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/pinctrl/consumer.h>
  34 #include <linux/ctype.h>
  35 #include <linux/slab.h>
  36 #include <linux/of.h>
  37 #include <sound/core.h>
  38 #include <sound/jack.h>
  39 #include <sound/pcm.h>
  40 #include <sound/pcm_params.h>
  41 #include <sound/soc.h>
  42 #include <sound/soc-dpcm.h>
  43 #include <sound/initval.h>
  44
  45 #define CREATE_TRACE_POINTS
  46 #include <trace/events/asoc.h>
  47
  48 #define NAME_SIZE       32
  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(platform_list);
  57 static LIST_HEAD(codec_list);
  58 static LIST_HEAD(component_list);
  59
  60 /*
  61  * This is a timeout to do a DAPM powerdown after a stream is closed().
  62  * It can be used to eliminate pops between different playback streams, e.g.
  63  * between two audio tracks.
  64  */
  65 static int pmdown_time = 5000;
  66 module_param(pmdown_time, int, 0);
  67 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
  68
  69 /* returns the minimum number of bytes needed to represent
  70  * a particular given value */
  71 static int min_bytes_needed(unsigned long val)
  72 {
  73         int c = 0;
  74         int i;
  75
  76         for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
  77                 if (val & (1UL << i))
  78                         break;
  79         c = (sizeof val * 8) - c;
  80         if (!c || (c % 8))
  81                 c = (c + 8) / 8;
  82         else
  83                 c /= 8;
  84         return c;
  85 }
  86
  87 /* fill buf which is 'len' bytes with a formatted
  88  * string of the form 'reg: value\n' */
  89 static int format_register_str(struct snd_soc_codec *codec,
  90                                unsigned int reg, char *buf, size_t len)
  91 {
  92         int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
  93         int regsize = codec->driver->reg_word_size * 2;
  94         int ret;
  95         char tmpbuf[len + 1];
  96         char regbuf[regsize + 1];
  97
  98         /* since tmpbuf is allocated on the stack, warn the callers if they
  99          * try to abuse this function */
 100         WARN_ON(len > 63);
 101
 102         /* +2 for ': ' and + 1 for '\n' */
 103         if (wordsize + regsize + 2 + 1 != len)
 104                 return -EINVAL;
 105
 106         ret = snd_soc_read(codec, reg);
 107         if (ret < 0) {
 108                 memset(regbuf, 'X', regsize);
 109                 regbuf[regsize] = '\0';
 110         } else {
 111                 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
 112         }
 113
 114         /* prepare the buffer */
 115         snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
 116         /* copy it back to the caller without the '\0' */
 117         memcpy(buf, tmpbuf, len);
 118
 119         return 0;
 120 }
 121
 122 /* codec register dump */
 123 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
 124                                   size_t count, loff_t pos)
 125 {
 126         int i, step = 1;
 127         int wordsize, regsize;
 128         int len;
 129         size_t total = 0;
 130         loff_t p = 0;
 131
 132         wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
 133         regsize = codec->driver->reg_word_size * 2;
 134
 135         len = wordsize + regsize + 2 + 1;
 136
 137         if (!codec->driver->reg_cache_size)
 138                 return 0;
 139
 140         if (codec->driver->reg_cache_step)
 141                 step = codec->driver->reg_cache_step;
 142
 143         for (i = 0; i < codec->driver->reg_cache_size; i += step) {
 144                 /* only support larger than PAGE_SIZE bytes debugfs
 145                  * entries for the default case */
 146                 if (p >= pos) {
 147                         if (total + len >= count - 1)
 148                                 break;
 149                         format_register_str(codec, i, buf + total, len);
 150                         total += len;
 151                 }
 152                 p += len;
 153         }
 154
 155         total = min(total, count - 1);
 156
 157         return total;
 158 }
 159
 160 static ssize_t codec_reg_show(struct device *dev,
 161         struct device_attribute *attr, char *buf)
 162 {
 163         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 164
 165         return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
 166 }
 167
 168 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
 169
 170 static ssize_t pmdown_time_show(struct device *dev,
 171                                 struct device_attribute *attr, char *buf)
 172 {
 173         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 174
 175         return sprintf(buf, "%ld\n", rtd->pmdown_time);
 176 }
 177
 178 static ssize_t pmdown_time_set(struct device *dev,
 179                                struct device_attribute *attr,
 180                                const char *buf, size_t count)
 181 {
 182         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 183         int ret;
 184
 185         ret = kstrtol(buf, 10, &rtd->pmdown_time);
 186         if (ret)
 187                 return ret;
 188
 189         return count;
 190 }
 191
 192 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
 193
 194 #ifdef CONFIG_DEBUG_FS
 195 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 196                                    size_t count, loff_t *ppos)
 197 {
 198         ssize_t ret;
 199         struct snd_soc_codec *codec = file->private_data;
 200         char *buf;
 201
 202         if (*ppos < 0 || !count)
 203                 return -EINVAL;
 204
 205         buf = kmalloc(count, GFP_KERNEL);
 206         if (!buf)
 207                 return -ENOMEM;
 208
 209         ret = soc_codec_reg_show(codec, buf, count, *ppos);
 210         if (ret >= 0) {
 211                 if (copy_to_user(user_buf, buf, ret)) {
 212                         kfree(buf);
 213                         return -EFAULT;
 214                 }
 215                 *ppos += ret;
 216         }
 217
 218         kfree(buf);
 219         return ret;
 220 }
 221
 222 static ssize_t codec_reg_write_file(struct file *file,
 223                 const char __user *user_buf, size_t count, loff_t *ppos)
 224 {
 225         char buf[32];
 226         size_t buf_size;
 227         char *start = buf;
 228         unsigned long reg, value;
 229         struct snd_soc_codec *codec = file->private_data;
 230         int ret;
 231
 232         buf_size = min(count, (sizeof(buf)-1));
 233         if (copy_from_user(buf, user_buf, buf_size))
 234                 return -EFAULT;
 235         buf[buf_size] = 0;
 236
 237         while (*start == ' ')
 238                 start++;
 239         reg = simple_strtoul(start, &start, 16);
 240         while (*start == ' ')
 241                 start++;
 242         ret = kstrtoul(start, 16, &value);
 243         if (ret)
 244                 return ret;
 245
 246         /* Userspace has been fiddling around behind the kernel's back */
 247         add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
 248
 249         snd_soc_write(codec, reg, value);
 250         return buf_size;
 251 }
 252
 253 static const struct file_operations codec_reg_fops = {
 254         .open = simple_open,
 255         .read = codec_reg_read_file,
 256         .write = codec_reg_write_file,
 257         .llseek = default_llseek,
 258 };
 259
 260 static void soc_init_component_debugfs(struct snd_soc_component *component)
 261 {
 262         if (component->debugfs_prefix) {
 263                 char *name;
 264
 265                 name = kasprintf(GFP_KERNEL, "%s:%s",
 266                         component->debugfs_prefix, component->name);
 267                 if (name) {
 268                         component->debugfs_root = debugfs_create_dir(name,
 269                                 component->card->debugfs_card_root);
 270                         kfree(name);
 271                 }
 272         } else {
 273                 component->debugfs_root = debugfs_create_dir(component->name,
 274                                 component->card->debugfs_card_root);
 275         }
 276
 277         if (!component->debugfs_root) {
 278                 dev_warn(component->dev,
 279                         "ASoC: Failed to create component debugfs directory\n");
 280                 return;
 281         }
 282
 283         snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
 284                 component->debugfs_root);
 285
 286         if (component->init_debugfs)
 287                 component->init_debugfs(component);
 288 }
 289
 290 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
 291 {
 292         debugfs_remove_recursive(component->debugfs_root);
 293 }
 294
 295 static void soc_init_codec_debugfs(struct snd_soc_component *component)
 296 {
 297         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
 298
 299         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 300                                                  codec->component.debugfs_root,
 301                                                  codec, &codec_reg_fops);
 302         if (!codec->debugfs_reg)
 303                 dev_warn(codec->dev,
 304                         "ASoC: Failed to create codec register debugfs file\n");
 305 }
 306
 307 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 308                                     size_t count, loff_t *ppos)
 309 {
 310         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 311         ssize_t len, ret = 0;
 312         struct snd_soc_codec *codec;
 313
 314         if (!buf)
 315                 return -ENOMEM;
 316
 317         list_for_each_entry(codec, &codec_list, list) {
 318                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 319                                codec->component.name);
 320                 if (len >= 0)
 321                         ret += len;
 322                 if (ret > PAGE_SIZE) {
 323                         ret = PAGE_SIZE;
 324                         break;
 325                 }
 326         }
 327
 328         if (ret >= 0)
 329                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 330
 331         kfree(buf);
 332
 333         return ret;
 334 }
 335
 336 static const struct file_operations codec_list_fops = {
 337         .read = codec_list_read_file,
 338         .llseek = default_llseek,/* read accesses f_pos */
 339 };
 340
 341 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 342                                   size_t count, loff_t *ppos)
 343 {
 344         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 345         ssize_t len, ret = 0;
 346         struct snd_soc_component *component;
 347         struct snd_soc_dai *dai;
 348
 349         if (!buf)
 350                 return -ENOMEM;
 351
 352         list_for_each_entry(component, &component_list, list) {
 353                 list_for_each_entry(dai, &component->dai_list, list) {
 354                         len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 355                                 dai->name);
 356                         if (len >= 0)
 357                                 ret += len;
 358                         if (ret > PAGE_SIZE) {
 359                                 ret = PAGE_SIZE;
 360                                 break;
 361                         }
 362                 }
 363         }
 364
 365         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 366
 367         kfree(buf);
 368
 369         return ret;
 370 }
 371
 372 static const struct file_operations dai_list_fops = {
 373         .read = dai_list_read_file,
 374         .llseek = default_llseek,/* read accesses f_pos */
 375 };
 376
 377 static ssize_t platform_list_read_file(struct file *file,
 378                                        char __user *user_buf,
 379                                        size_t count, loff_t *ppos)
 380 {
 381         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 382         ssize_t len, ret = 0;
 383         struct snd_soc_platform *platform;
 384
 385         if (!buf)
 386                 return -ENOMEM;
 387
 388         list_for_each_entry(platform, &platform_list, list) {
 389                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 390                                platform->component.name);
 391                 if (len >= 0)
 392                         ret += len;
 393                 if (ret > PAGE_SIZE) {
 394                         ret = PAGE_SIZE;
 395                         break;
 396                 }
 397         }
 398
 399         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 400
 401         kfree(buf);
 402
 403         return ret;
 404 }
 405
 406 static const struct file_operations platform_list_fops = {
 407         .read = platform_list_read_file,
 408         .llseek = default_llseek,/* read accesses f_pos */
 409 };
 410
 411 static void soc_init_card_debugfs(struct snd_soc_card *card)
 412 {
 413         card->debugfs_card_root = debugfs_create_dir(card->name,
 414                                                      snd_soc_debugfs_root);
 415         if (!card->debugfs_card_root) {
 416                 dev_warn(card->dev,
 417                          "ASoC: Failed to create card debugfs directory\n");
 418                 return;
 419         }
 420
 421         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 422                                                     card->debugfs_card_root,
 423                                                     &card->pop_time);
 424         if (!card->debugfs_pop_time)
 425                 dev_warn(card->dev,
 426                        "ASoC: Failed to create pop time debugfs file\n");
 427 }
 428
 429 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 430 {
 431         debugfs_remove_recursive(card->debugfs_card_root);
 432 }
 433
 434 #else
 435
 436 #define soc_init_codec_debugfs NULL
 437
 438 static inline void soc_init_component_debugfs(
 439         struct snd_soc_component *component)
 440 {
 441 }
 442
 443 static inline void soc_cleanup_component_debugfs(
 444         struct snd_soc_component *component)
 445 {
 446 }
 447
 448 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 449 {
 450 }
 451
 452 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 453 {
 454 }
 455 #endif
 456
 457 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
 458                 const char *dai_link, int stream)
 459 {
 460         int i;
 461
 462         for (i = 0; i < card->num_links; i++) {
 463                 if (card->rtd[i].dai_link->no_pcm &&
 464                         !strcmp(card->rtd[i].dai_link->name, dai_link))
 465                         return card->rtd[i].pcm->streams[stream].substream;
 466         }
 467         dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
 468         return NULL;
 469 }
 470 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
 471
 472 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
 473                 const char *dai_link)
 474 {
 475         int i;
 476
 477         for (i = 0; i < card->num_links; i++) {
 478                 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
 479                         return &card->rtd[i];
 480         }
 481         dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
 482         return NULL;
 483 }
 484 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
 485
 486 static void codec2codec_close_delayed_work(struct work_struct *work)
 487 {
 488         /* Currently nothing to do for c2c links
 489          * Since c2c links are internal nodes in the DAPM graph and
 490          * don't interface with the outside world or application layer
 491          * we don't have to do any special handling on close.
 492          */
 493 }
 494
 495 #ifdef CONFIG_PM_SLEEP
 496 /* powers down audio subsystem for suspend */
 497 int snd_soc_suspend(struct device *dev)
 498 {
 499         struct snd_soc_card *card = dev_get_drvdata(dev);
 500         struct snd_soc_codec *codec;
 501         int i, j;
 502
 503         /* If the card is not initialized yet there is nothing to do */
 504         if (!card->instantiated)
 505                 return 0;
 506
 507         /* Due to the resume being scheduled into a workqueue we could
 508         * suspend before that's finished - wait for it to complete.
 509          */
 510         snd_power_lock(card->snd_card);
 511         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
 512         snd_power_unlock(card->snd_card);
 513
 514         /* we're going to block userspace touching us until resume completes */
 515         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
 516
 517         /* mute any active DACs */
 518         for (i = 0; i < card->num_rtd; i++) {
 519
 520                 if (card->rtd[i].dai_link->ignore_suspend)
 521                         continue;
 522
 523                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
 524                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
 525                         struct snd_soc_dai_driver *drv = dai->driver;
 526
 527                         if (drv->ops->digital_mute && dai->playback_active)
 528                                 drv->ops->digital_mute(dai, 1);
 529                 }
 530         }
 531
 532         /* suspend all pcms */
 533         for (i = 0; i < card->num_rtd; i++) {
 534                 if (card->rtd[i].dai_link->ignore_suspend)
 535                         continue;
 536
 537                 snd_pcm_suspend_all(card->rtd[i].pcm);
 538         }
 539
 540         if (card->suspend_pre)
 541                 card->suspend_pre(card);
 542
 543         for (i = 0; i < card->num_rtd; i++) {
 544                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 545
 546                 if (card->rtd[i].dai_link->ignore_suspend)
 547                         continue;
 548
 549                 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
 550                         cpu_dai->driver->suspend(cpu_dai);
 551         }
 552
 553         /* close any waiting streams and save state */
 554         for (i = 0; i < card->num_rtd; i++) {
 555                 struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais;
 556                 flush_delayed_work(&card->rtd[i].delayed_work);
 557                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
 558                         codec_dais[j]->codec->dapm.suspend_bias_level =
 559                                         codec_dais[j]->codec->dapm.bias_level;
 560                 }
 561         }
 562
 563         for (i = 0; i < card->num_rtd; i++) {
 564
 565                 if (card->rtd[i].dai_link->ignore_suspend)
 566                         continue;
 567
 568                 snd_soc_dapm_stream_event(&card->rtd[i],
 569                                           SNDRV_PCM_STREAM_PLAYBACK,
 570                                           SND_SOC_DAPM_STREAM_SUSPEND);
 571
 572                 snd_soc_dapm_stream_event(&card->rtd[i],
 573                                           SNDRV_PCM_STREAM_CAPTURE,
 574                                           SND_SOC_DAPM_STREAM_SUSPEND);
 575         }
 576
 577         /* Recheck all endpoints too, their state is affected by suspend */
 578         dapm_mark_endpoints_dirty(card);
 579         snd_soc_dapm_sync(&card->dapm);
 580
 581         /* suspend all CODECs */
 582         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 583                 /* If there are paths active then the CODEC will be held with
 584                  * bias _ON and should not be suspended. */
 585                 if (!codec->suspended) {
 586                         switch (codec->dapm.bias_level) {
 587                         case SND_SOC_BIAS_STANDBY:
 588                                 /*
 589                                  * If the CODEC is capable of idle
 590                                  * bias off then being in STANDBY
 591                                  * means it's doing something,
 592                                  * otherwise fall through.
 593                                  */
 594                                 if (codec->dapm.idle_bias_off) {
 595                                         dev_dbg(codec->dev,
 596                                                 "ASoC: idle_bias_off CODEC on over suspend\n");
 597                                         break;
 598                                 }
 599
 600                         case SND_SOC_BIAS_OFF:
 601                                 if (codec->driver->suspend)
 602                                         codec->driver->suspend(codec);
 603                                 codec->suspended = 1;
 604                                 if (codec->component.regmap)
 605                                         regcache_mark_dirty(codec->component.regmap);
 606                                 /* deactivate pins to sleep state */
 607                                 pinctrl_pm_select_sleep_state(codec->dev);
 608                                 break;
 609                         default:
 610                                 dev_dbg(codec->dev,
 611                                         "ASoC: CODEC is on over suspend\n");
 612                                 break;
 613                         }
 614                 }
 615         }
 616
 617         for (i = 0; i < card->num_rtd; i++) {
 618                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 619
 620                 if (card->rtd[i].dai_link->ignore_suspend)
 621                         continue;
 622
 623                 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
 624                         cpu_dai->driver->suspend(cpu_dai);
 625
 626                 /* deactivate pins to sleep state */
 627                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 628         }
 629
 630         if (card->suspend_post)
 631                 card->suspend_post(card);
 632
 633         return 0;
 634 }
 635 EXPORT_SYMBOL_GPL(snd_soc_suspend);
 636
 637 /* deferred resume work, so resume can complete before we finished
 638  * setting our codec back up, which can be very slow on I2C
 639  */
 640 static void soc_resume_deferred(struct work_struct *work)
 641 {
 642         struct snd_soc_card *card =
 643                         container_of(work, struct snd_soc_card, deferred_resume_work);
 644         struct snd_soc_codec *codec;
 645         int i, j;
 646
 647         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
 648          * so userspace apps are blocked from touching us
 649          */
 650
 651         dev_dbg(card->dev, "ASoC: starting resume work\n");
 652
 653         /* Bring us up into D2 so that DAPM starts enabling things */
 654         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
 655
 656         if (card->resume_pre)
 657                 card->resume_pre(card);
 658
 659         /* resume control bus DAIs */
 660         for (i = 0; i < card->num_rtd; i++) {
 661                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 662
 663                 if (card->rtd[i].dai_link->ignore_suspend)
 664                         continue;
 665
 666                 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
 667                         cpu_dai->driver->resume(cpu_dai);
 668         }
 669
 670         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 671                 /* If the CODEC was idle over suspend then it will have been
 672                  * left with bias OFF or STANDBY and suspended so we must now
 673                  * resume.  Otherwise the suspend was suppressed.
 674                  */
 675                 if (codec->suspended) {
 676                         switch (codec->dapm.bias_level) {
 677                         case SND_SOC_BIAS_STANDBY:
 678                         case SND_SOC_BIAS_OFF:
 679                                 if (codec->driver->resume)
 680                                         codec->driver->resume(codec);
 681                                 codec->suspended = 0;
 682                                 break;
 683                         default:
 684                                 dev_dbg(codec->dev,
 685                                         "ASoC: CODEC was on over suspend\n");
 686                                 break;
 687                         }
 688                 }
 689         }
 690
 691         for (i = 0; i < card->num_rtd; i++) {
 692
 693                 if (card->rtd[i].dai_link->ignore_suspend)
 694                         continue;
 695
 696                 snd_soc_dapm_stream_event(&card->rtd[i],
 697                                           SNDRV_PCM_STREAM_PLAYBACK,
 698                                           SND_SOC_DAPM_STREAM_RESUME);
 699
 700                 snd_soc_dapm_stream_event(&card->rtd[i],
 701                                           SNDRV_PCM_STREAM_CAPTURE,
 702                                           SND_SOC_DAPM_STREAM_RESUME);
 703         }
 704
 705         /* unmute any active DACs */
 706         for (i = 0; i < card->num_rtd; i++) {
 707
 708                 if (card->rtd[i].dai_link->ignore_suspend)
 709                         continue;
 710
 711                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
 712                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
 713                         struct snd_soc_dai_driver *drv = dai->driver;
 714
 715                         if (drv->ops->digital_mute && dai->playback_active)
 716                                 drv->ops->digital_mute(dai, 0);
 717                 }
 718         }
 719
 720         for (i = 0; i < card->num_rtd; i++) {
 721                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 722
 723                 if (card->rtd[i].dai_link->ignore_suspend)
 724                         continue;
 725
 726                 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
 727                         cpu_dai->driver->resume(cpu_dai);
 728         }
 729
 730         if (card->resume_post)
 731                 card->resume_post(card);
 732
 733         dev_dbg(card->dev, "ASoC: resume work completed\n");
 734
 735         /* userspace can access us now we are back as we were before */
 736         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
 737
 738         /* Recheck all endpoints too, their state is affected by suspend */
 739         dapm_mark_endpoints_dirty(card);
 740         snd_soc_dapm_sync(&card->dapm);
 741 }
 742
 743 /* powers up audio subsystem after a suspend */
 744 int snd_soc_resume(struct device *dev)
 745 {
 746         struct snd_soc_card *card = dev_get_drvdata(dev);
 747         bool bus_control = false;
 748         int i;
 749
 750         /* If the card is not initialized yet there is nothing to do */
 751         if (!card->instantiated)
 752                 return 0;
 753
 754         /* activate pins from sleep state */
 755         for (i = 0; i < card->num_rtd; i++) {
 756                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
 757                 struct snd_soc_dai **codec_dais = rtd->codec_dais;
 758                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 759                 int j;
 760
 761                 if (cpu_dai->active)
 762                         pinctrl_pm_select_default_state(cpu_dai->dev);
 763
 764                 for (j = 0; j < rtd->num_codecs; j++) {
 765                         struct snd_soc_dai *codec_dai = codec_dais[j];
 766                         if (codec_dai->active)
 767                                 pinctrl_pm_select_default_state(codec_dai->dev);
 768                 }
 769         }
 770
 771         /*
 772          * DAIs that also act as the control bus master might have other drivers
 773          * hanging off them so need to resume immediately. Other drivers don't
 774          * have that problem and may take a substantial amount of time to resume
 775          * due to I/O costs and anti-pop so handle them out of line.
 776          */
 777         for (i = 0; i < card->num_rtd; i++) {
 778                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 779                 bus_control |= cpu_dai->driver->bus_control;
 780         }
 781         if (bus_control) {
 782                 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
 783                 soc_resume_deferred(&card->deferred_resume_work);
 784         } else {
 785                 dev_dbg(dev, "ASoC: Scheduling resume work\n");
 786                 if (!schedule_work(&card->deferred_resume_work))
 787                         dev_err(dev, "ASoC: resume work item may be lost\n");
 788         }
 789
 790         return 0;
 791 }
 792 EXPORT_SYMBOL_GPL(snd_soc_resume);
 793 #else
 794 #define snd_soc_suspend NULL
 795 #define snd_soc_resume NULL
 796 #endif
 797
 798 static const struct snd_soc_dai_ops null_dai_ops = {
 799 };
 800
 801 static struct snd_soc_component *soc_find_component(
 802         const struct device_node *of_node, const char *name)
 803 {
 804         struct snd_soc_component *component;
 805
 806         list_for_each_entry(component, &component_list, list) {
 807                 if (of_node) {
 808                         if (component->dev->of_node == of_node)
 809                                 return component;
 810                 } else if (strcmp(component->name, name) == 0) {
 811                         return component;
 812                 }
 813         }
 814
 815         return NULL;
 816 }
 817
 818 static struct snd_soc_dai *snd_soc_find_dai(
 819         const struct snd_soc_dai_link_component *dlc)
 820 {
 821         struct snd_soc_component *component;
 822         struct snd_soc_dai *dai;
 823
 824         /* Find CPU DAI from registered DAIs*/
 825         list_for_each_entry(component, &component_list, list) {
 826                 if (dlc->of_node && component->dev->of_node != dlc->of_node)
 827                         continue;
 828                 if (dlc->name && strcmp(component->name, dlc->name))
 829                         continue;
 830                 list_for_each_entry(dai, &component->dai_list, list) {
 831                         if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
 832                                 continue;
 833
 834                         return dai;
 835                 }
 836         }
 837
 838         return NULL;
 839 }
 840
 841 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
 842 {
 843         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
 844         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 845         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
 846         struct snd_soc_dai_link_component cpu_dai_component;
 847         struct snd_soc_dai **codec_dais = rtd->codec_dais;
 848         struct snd_soc_platform *platform;
 849         const char *platform_name;
 850         int i;
 851
 852         dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
 853
 854         cpu_dai_component.name = dai_link->cpu_name;
 855         cpu_dai_component.of_node = dai_link->cpu_of_node;
 856         cpu_dai_component.dai_name = dai_link->cpu_dai_name;
 857         rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
 858         if (!rtd->cpu_dai) {
 859                 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
 860                         dai_link->cpu_dai_name);
 861                 return -EPROBE_DEFER;
 862         }
 863
 864         rtd->num_codecs = dai_link->num_codecs;
 865
 866         /* Find CODEC from registered CODECs */
 867         for (i = 0; i < rtd->num_codecs; i++) {
 868                 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
 869                 if (!codec_dais[i]) {
 870                         dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
 871                                 codecs[i].dai_name);
 872                         return -EPROBE_DEFER;
 873                 }
 874         }
 875
 876         /* Single codec links expect codec and codec_dai in runtime data */
 877         rtd->codec_dai = codec_dais[0];
 878         rtd->codec = rtd->codec_dai->codec;
 879
 880         /* if there's no platform we match on the empty platform */
 881         platform_name = dai_link->platform_name;
 882         if (!platform_name && !dai_link->platform_of_node)
 883                 platform_name = "snd-soc-dummy";
 884
 885         /* find one from the set of registered platforms */
 886         list_for_each_entry(platform, &platform_list, list) {
 887                 if (dai_link->platform_of_node) {
 888                         if (platform->dev->of_node !=
 889                             dai_link->platform_of_node)
 890                                 continue;
 891                 } else {
 892                         if (strcmp(platform->component.name, platform_name))
 893                                 continue;
 894                 }
 895
 896                 rtd->platform = platform;
 897         }
 898         if (!rtd->platform) {
 899                 dev_err(card->dev, "ASoC: platform %s not registered\n",
 900                         dai_link->platform_name);
 901                 return -EPROBE_DEFER;
 902         }
 903
 904         card->num_rtd++;
 905
 906         return 0;
 907 }
 908
 909 static void soc_remove_component(struct snd_soc_component *component)
 910 {
 911         if (!component->probed)
 912                 return;
 913
 914         /* This is a HACK and will be removed soon */
 915         if (component->codec)
 916                 list_del(&component->codec->card_list);
 917
 918         if (component->remove)
 919                 component->remove(component);
 920
 921         snd_soc_dapm_free(snd_soc_component_get_dapm(component));
 922
 923         soc_cleanup_component_debugfs(component);
 924         component->probed = 0;
 925         module_put(component->dev->driver->owner);
 926 }
 927
 928 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
 929 {
 930         int err;
 931
 932         if (dai && dai->probed &&
 933                         dai->driver->remove_order == order) {
 934                 if (dai->driver->remove) {
 935                         err = dai->driver->remove(dai);
 936                         if (err < 0)
 937                                 dev_err(dai->dev,
 938                                         "ASoC: failed to remove %s: %d\n",
 939                                         dai->name, err);
 940                 }
 941                 dai->probed = 0;
 942         }
 943 }
 944
 945 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
 946 {
 947         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 948         int i;
 949
 950         /* unregister the rtd device */
 951         if (rtd->dev_registered) {
 952                 device_remove_file(rtd->dev, &dev_attr_pmdown_time);
 953                 device_remove_file(rtd->dev, &dev_attr_codec_reg);
 954                 device_unregister(rtd->dev);
 955                 rtd->dev_registered = 0;
 956         }
 957
 958         /* remove the CODEC DAI */
 959         for (i = 0; i < rtd->num_codecs; i++)
 960                 soc_remove_dai(rtd->codec_dais[i], order);
 961
 962         soc_remove_dai(rtd->cpu_dai, order);
 963 }
 964
 965 static void soc_remove_link_components(struct snd_soc_card *card, int num,
 966                                        int order)
 967 {
 968         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 969         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 970         struct snd_soc_platform *platform = rtd->platform;
 971         struct snd_soc_component *component;
 972         int i;
 973
 974         /* remove the platform */
 975         if (platform && platform->component.driver->remove_order == order)
 976                 soc_remove_component(&platform->component);
 977
 978         /* remove the CODEC-side CODEC */
 979         for (i = 0; i < rtd->num_codecs; i++) {
 980                 component = rtd->codec_dais[i]->component;
 981                 if (component->driver->remove_order == order)
 982                         soc_remove_component(component);
 983         }
 984
 985         /* remove any CPU-side CODEC */
 986         if (cpu_dai) {
 987                 if (cpu_dai->component->driver->remove_order == order)
 988                         soc_remove_component(cpu_dai->component);
 989         }
 990 }
 991
 992 static void soc_remove_dai_links(struct snd_soc_card *card)
 993 {
 994         int dai, order;
 995
 996         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
 997                         order++) {
 998                 for (dai = 0; dai < card->num_rtd; dai++)
 999                         soc_remove_link_dais(card, dai, order);
1000         }
1001
1002         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1003                         order++) {
1004                 for (dai = 0; dai < card->num_rtd; dai++)
1005                         soc_remove_link_components(card, dai, order);
1006         }
1007
1008         card->num_rtd = 0;
1009 }
1010
1011 static void soc_set_name_prefix(struct snd_soc_card *card,
1012                                 struct snd_soc_component *component)
1013 {
1014         int i;
1015
1016         if (card->codec_conf == NULL)
1017                 return;
1018
1019         for (i = 0; i < card->num_configs; i++) {
1020                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1021                 if (map->of_node && component->dev->of_node != map->of_node)
1022                         continue;
1023                 if (map->dev_name && strcmp(component->name, map->dev_name))
1024                         continue;
1025                 component->name_prefix = map->name_prefix;
1026                 break;
1027         }
1028 }
1029
1030 static int soc_probe_component(struct snd_soc_card *card,
1031         struct snd_soc_component *component)
1032 {
1033         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1034         struct snd_soc_dai *dai;
1035         int ret;
1036
1037         if (component->probed)
1038                 return 0;
1039
1040         component->card = card;
1041         dapm->card = card;
1042         soc_set_name_prefix(card, component);
1043
1044         if (!try_module_get(component->dev->driver->owner))
1045                 return -ENODEV;
1046
1047         soc_init_component_debugfs(component);
1048
1049         if (component->dapm_widgets) {
1050                 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1051                         component->num_dapm_widgets);
1052
1053                 if (ret != 0) {
1054                         dev_err(component->dev,
1055                                 "Failed to create new controls %d\n", ret);
1056                         goto err_probe;
1057                 }
1058         }
1059
1060         list_for_each_entry(dai, &component->dai_list, list) {
1061                 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1062                 if (ret != 0) {
1063                         dev_err(component->dev,
1064                                 "Failed to create DAI widgets %d\n", ret);
1065                         goto err_probe;
1066                 }
1067         }
1068
1069         if (component->probe) {
1070                 ret = component->probe(component);
1071                 if (ret < 0) {
1072                         dev_err(component->dev,
1073                                 "ASoC: failed to probe component %d\n", ret);
1074                         goto err_probe;
1075                 }
1076
1077                 WARN(dapm->idle_bias_off &&
1078                         dapm->bias_level != SND_SOC_BIAS_OFF,
1079                         "codec %s can not start from non-off bias with idle_bias_off==1\n",
1080                         component->name);
1081         }
1082
1083         if (component->controls)
1084                 snd_soc_add_component_controls(component, component->controls,
1085                                      component->num_controls);
1086         if (component->dapm_routes)
1087                 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1088                                         component->num_dapm_routes);
1089
1090         component->probed = 1;
1091         list_add(&dapm->list, &card->dapm_list);
1092
1093         /* This is a HACK and will be removed soon */
1094         if (component->codec)
1095                 list_add(&component->codec->card_list, &card->codec_dev_list);
1096
1097         return 0;
1098
1099 err_probe:
1100         soc_cleanup_component_debugfs(component);
1101         module_put(component->dev->driver->owner);
1102
1103         return ret;
1104 }
1105
1106 static void rtd_release(struct device *dev)
1107 {
1108         kfree(dev);
1109 }
1110
1111 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1112         const char *name)
1113 {
1114         int ret = 0;
1115
1116         /* register the rtd device */
1117         rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1118         if (!rtd->dev)
1119                 return -ENOMEM;
1120         device_initialize(rtd->dev);
1121         rtd->dev->parent = rtd->card->dev;
1122         rtd->dev->release = rtd_release;
1123         dev_set_name(rtd->dev, "%s", name);
1124         dev_set_drvdata(rtd->dev, rtd);
1125         mutex_init(&rtd->pcm_mutex);
1126         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1127         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1128         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1129         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1130         ret = device_add(rtd->dev);
1131         if (ret < 0) {
1132                 /* calling put_device() here to free the rtd->dev */
1133                 put_device(rtd->dev);
1134                 dev_err(rtd->card->dev,
1135                         "ASoC: failed to register runtime device: %d\n", ret);
1136                 return ret;
1137         }
1138         rtd->dev_registered = 1;
1139
1140         if (rtd->codec) {
1141                 /* add DAPM sysfs entries for this codec */
1142                 ret = snd_soc_dapm_sys_add(rtd->dev);
1143                 if (ret < 0)
1144                         dev_err(rtd->dev,
1145                                 "ASoC: failed to add codec dapm sysfs entries: %d\n",
1146                                 ret);
1147
1148                 /* add codec sysfs entries */
1149                 ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1150                 if (ret < 0)
1151                         dev_err(rtd->dev,
1152                                 "ASoC: failed to add codec sysfs files: %d\n",
1153                                 ret);
1154         }
1155
1156         return 0;
1157 }
1158
1159 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1160                                      int order)
1161 {
1162         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1163         struct snd_soc_platform *platform = rtd->platform;
1164         struct snd_soc_component *component;
1165         int i, ret;
1166
1167         /* probe the CPU-side component, if it is a CODEC */
1168         component = rtd->cpu_dai->component;
1169         if (component->driver->probe_order == order) {
1170                 ret = soc_probe_component(card, component);
1171                 if (ret < 0)
1172                         return ret;
1173         }
1174
1175         /* probe the CODEC-side components */
1176         for (i = 0; i < rtd->num_codecs; i++) {
1177                 component = rtd->codec_dais[i]->component;
1178                 if (component->driver->probe_order == order) {
1179                         ret = soc_probe_component(card, component);
1180                         if (ret < 0)
1181                                 return ret;
1182                 }
1183         }
1184
1185         /* probe the platform */
1186         if (platform->component.driver->probe_order == order) {
1187                 ret = soc_probe_component(card, &platform->component);
1188                 if (ret < 0)
1189                         return ret;
1190         }
1191
1192         return 0;
1193 }
1194
1195 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1196 {
1197         int ret;
1198
1199         if (!dai->probed && dai->driver->probe_order == order) {
1200                 if (dai->driver->probe) {
1201                         ret = dai->driver->probe(dai);
1202                         if (ret < 0) {
1203                                 dev_err(dai->dev,
1204                                         "ASoC: failed to probe DAI %s: %d\n",
1205                                         dai->name, ret);
1206                                 return ret;
1207                         }
1208                 }
1209
1210                 dai->probed = 1;
1211         }
1212
1213         return 0;
1214 }
1215
1216 static int soc_link_dai_widgets(struct snd_soc_card *card,
1217                                 struct snd_soc_dai_link *dai_link,
1218                                 struct snd_soc_pcm_runtime *rtd)
1219 {
1220         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1221         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1222         struct snd_soc_dapm_widget *play_w, *capture_w;
1223         int ret;
1224
1225         if (rtd->num_codecs > 1)
1226                 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1227
1228         /* link the DAI widgets */
1229         play_w = codec_dai->playback_widget;
1230         capture_w = cpu_dai->capture_widget;
1231         if (play_w && capture_w) {
1232                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1233                                            capture_w, play_w);
1234                 if (ret != 0) {
1235                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1236                                 play_w->name, capture_w->name, ret);
1237                         return ret;
1238                 }
1239         }
1240
1241         play_w = cpu_dai->playback_widget;
1242         capture_w = codec_dai->capture_widget;
1243         if (play_w && capture_w) {
1244                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1245                                            capture_w, play_w);
1246                 if (ret != 0) {
1247                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1248                                 play_w->name, capture_w->name, ret);
1249                         return ret;
1250                 }
1251         }
1252
1253         return 0;
1254 }
1255
1256 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1257 {
1258         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1259         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1260         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1261         int i, ret;
1262
1263         dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1264                         card->name, num, order);
1265
1266         /* set default power off timeout */
1267         rtd->pmdown_time = pmdown_time;
1268
1269         ret = soc_probe_dai(cpu_dai, order);
1270         if (ret)
1271                 return ret;
1272
1273         /* probe the CODEC DAI */
1274         for (i = 0; i < rtd->num_codecs; i++) {
1275                 ret = soc_probe_dai(rtd->codec_dais[i], order);
1276                 if (ret)
1277                         return ret;
1278         }
1279
1280         /* complete DAI probe during last probe */
1281         if (order != SND_SOC_COMP_ORDER_LAST)
1282                 return 0;
1283
1284         /* do machine specific initialization */
1285         if (dai_link->init) {
1286                 ret = dai_link->init(rtd);
1287                 if (ret < 0) {
1288                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1289                                 dai_link->name, ret);
1290                         return ret;
1291                 }
1292         }
1293
1294         ret = soc_post_component_init(rtd, dai_link->name);
1295         if (ret)
1296                 return ret;
1297
1298 #ifdef CONFIG_DEBUG_FS
1299         /* add DPCM sysfs entries */
1300         if (dai_link->dynamic) {
1301                 ret = soc_dpcm_debugfs_add(rtd);
1302                 if (ret < 0) {
1303                         dev_err(rtd->dev,
1304                                 "ASoC: failed to add dpcm sysfs entries: %d\n",
1305                                 ret);
1306                         return ret;
1307                 }
1308         }
1309 #endif
1310
1311         ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1312         if (ret < 0)
1313                 dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
1314                         ret);
1315
1316         if (cpu_dai->driver->compress_dai) {
1317                 /*create compress_device"*/
1318                 ret = soc_new_compress(rtd, num);
1319                 if (ret < 0) {
1320                         dev_err(card->dev, "ASoC: can't create compress %s\n",
1321                                          dai_link->stream_name);
1322                         return ret;
1323                 }
1324         } else {
1325
1326                 if (!dai_link->params) {
1327                         /* create the pcm */
1328                         ret = soc_new_pcm(rtd, num);
1329                         if (ret < 0) {
1330                                 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1331                                        dai_link->stream_name, ret);
1332                                 return ret;
1333                         }
1334                 } else {
1335                         INIT_DELAYED_WORK(&rtd->delayed_work,
1336                                                 codec2codec_close_delayed_work);
1337
1338                         /* link the DAI widgets */
1339                         ret = soc_link_dai_widgets(card, dai_link, rtd);
1340                         if (ret)
1341                                 return ret;
1342                 }
1343         }
1344
1345         return 0;
1346 }
1347
1348 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1349 {
1350         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1351         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1352         const char *name = aux_dev->codec_name;
1353
1354         rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1355         if (!rtd->component) {
1356                 if (aux_dev->codec_of_node)
1357                         name = of_node_full_name(aux_dev->codec_of_node);
1358
1359                 dev_err(card->dev, "ASoC: %s not registered\n", name);
1360                 return -EPROBE_DEFER;
1361         }
1362
1363         /*
1364          * Some places still reference rtd->codec, so we have to keep that
1365          * initialized if the component is a CODEC. Once all those references
1366          * have been removed, this code can be removed as well.
1367          */
1368          rtd->codec = rtd->component->codec;
1369
1370         return 0;
1371 }
1372
1373 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1374 {
1375         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1376         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1377         int ret;
1378
1379         ret = soc_probe_component(card, rtd->component);
1380         if (ret < 0)
1381                 return ret;
1382
1383         /* do machine specific initialization */
1384         if (aux_dev->init) {
1385                 ret = aux_dev->init(rtd->component);
1386                 if (ret < 0) {
1387                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1388                                 aux_dev->name, ret);
1389                         return ret;
1390                 }
1391         }
1392
1393         return soc_post_component_init(rtd, aux_dev->name);
1394 }
1395
1396 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1397 {
1398         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1399         struct snd_soc_component *component = rtd->component;
1400
1401         /* unregister the rtd device */
1402         if (rtd->dev_registered) {
1403                 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1404                 device_unregister(rtd->dev);
1405                 rtd->dev_registered = 0;
1406         }
1407
1408         if (component && component->probed)
1409                 soc_remove_component(component);
1410 }
1411
1412 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1413 {
1414         int ret;
1415
1416         if (codec->cache_init)
1417                 return 0;
1418
1419         ret = snd_soc_cache_init(codec);
1420         if (ret < 0) {
1421                 dev_err(codec->dev,
1422                         "ASoC: Failed to set cache compression type: %d\n",
1423                         ret);
1424                 return ret;
1425         }
1426         codec->cache_init = 1;
1427         return 0;
1428 }
1429
1430 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1431 {
1432         struct snd_soc_codec *codec;
1433         struct snd_soc_dai_link *dai_link;
1434         int ret, i, order, dai_fmt;
1435
1436         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1437
1438         /* bind DAIs */
1439         for (i = 0; i < card->num_links; i++) {
1440                 ret = soc_bind_dai_link(card, i);
1441                 if (ret != 0)
1442                         goto base_error;
1443         }
1444
1445         /* bind aux_devs too */
1446         for (i = 0; i < card->num_aux_devs; i++) {
1447                 ret = soc_bind_aux_dev(card, i);
1448                 if (ret != 0)
1449                         goto base_error;
1450         }
1451
1452         /* initialize the register cache for each available codec */
1453         list_for_each_entry(codec, &codec_list, list) {
1454                 if (codec->cache_init)
1455                         continue;
1456                 ret = snd_soc_init_codec_cache(codec);
1457                 if (ret < 0)
1458                         goto base_error;
1459         }
1460
1461         /* card bind complete so register a sound card */
1462         ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1463                         card->owner, 0, &card->snd_card);
1464         if (ret < 0) {
1465                 dev_err(card->dev,
1466                         "ASoC: can't create sound card for card %s: %d\n",
1467                         card->name, ret);
1468                 goto base_error;
1469         }
1470
1471         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1472         card->dapm.dev = card->dev;
1473         card->dapm.card = card;
1474         list_add(&card->dapm.list, &card->dapm_list);
1475
1476 #ifdef CONFIG_DEBUG_FS
1477         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1478 #endif
1479
1480 #ifdef CONFIG_PM_SLEEP
1481         /* deferred resume work */
1482         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1483 #endif
1484
1485         if (card->dapm_widgets)
1486                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1487                                           card->num_dapm_widgets);
1488
1489         /* initialise the sound card only once */
1490         if (card->probe) {
1491                 ret = card->probe(card);
1492                 if (ret < 0)
1493                         goto card_probe_error;
1494         }
1495
1496         /* probe all components used by DAI links on this card */
1497         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1498                         order++) {
1499                 for (i = 0; i < card->num_links; i++) {
1500                         ret = soc_probe_link_components(card, i, order);
1501                         if (ret < 0) {
1502                                 dev_err(card->dev,
1503                                         "ASoC: failed to instantiate card %d\n",
1504                                         ret);
1505                                 goto probe_dai_err;
1506                         }
1507                 }
1508         }
1509
1510         /* probe all DAI links on this card */
1511         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1512                         order++) {
1513                 for (i = 0; i < card->num_links; i++) {
1514                         ret = soc_probe_link_dais(card, i, order);
1515                         if (ret < 0) {
1516                                 dev_err(card->dev,
1517                                         "ASoC: failed to instantiate card %d\n",
1518                                         ret);
1519                                 goto probe_dai_err;
1520                         }
1521                 }
1522         }
1523
1524         for (i = 0; i < card->num_aux_devs; i++) {
1525                 ret = soc_probe_aux_dev(card, i);
1526                 if (ret < 0) {
1527                         dev_err(card->dev,
1528                                 "ASoC: failed to add auxiliary devices %d\n",
1529                                 ret);
1530                         goto probe_aux_dev_err;
1531                 }
1532         }
1533
1534         snd_soc_dapm_link_dai_widgets(card);
1535         snd_soc_dapm_connect_dai_link_widgets(card);
1536
1537         if (card->controls)
1538                 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1539
1540         if (card->dapm_routes)
1541                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1542                                         card->num_dapm_routes);
1543
1544         for (i = 0; i < card->num_links; i++) {
1545                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1546                 dai_link = &card->dai_link[i];
1547                 dai_fmt = dai_link->dai_fmt;
1548
1549                 if (dai_fmt) {
1550                         struct snd_soc_dai **codec_dais = rtd->codec_dais;
1551                         int j;
1552
1553                         for (j = 0; j < rtd->num_codecs; j++) {
1554                                 struct snd_soc_dai *codec_dai = codec_dais[j];
1555
1556                                 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1557                                 if (ret != 0 && ret != -ENOTSUPP)
1558                                         dev_warn(codec_dai->dev,
1559                                                  "ASoC: Failed to set DAI format: %d\n",
1560                                                  ret);
1561                         }
1562                 }
1563
1564                 /* If this is a regular CPU link there will be a platform */
1565                 if (dai_fmt &&
1566                     (dai_link->platform_name || dai_link->platform_of_node)) {
1567                         ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1568                                                   dai_fmt);
1569                         if (ret != 0 && ret != -ENOTSUPP)
1570                                 dev_warn(card->rtd[i].cpu_dai->dev,
1571                                          "ASoC: Failed to set DAI format: %d\n",
1572                                          ret);
1573                 } else if (dai_fmt) {
1574                         /* Flip the polarity for the "CPU" end */
1575                         dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1576                         switch (dai_link->dai_fmt &
1577                                 SND_SOC_DAIFMT_MASTER_MASK) {
1578                         case SND_SOC_DAIFMT_CBM_CFM:
1579                                 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1580                                 break;
1581                         case SND_SOC_DAIFMT_CBM_CFS:
1582                                 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1583                                 break;
1584                         case SND_SOC_DAIFMT_CBS_CFM:
1585                                 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1586                                 break;
1587                         case SND_SOC_DAIFMT_CBS_CFS:
1588                                 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1589                                 break;
1590                         }
1591
1592                         ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1593                                                   dai_fmt);
1594                         if (ret != 0 && ret != -ENOTSUPP)
1595                                 dev_warn(card->rtd[i].cpu_dai->dev,
1596                                          "ASoC: Failed to set DAI format: %d\n",
1597                                          ret);
1598                 }
1599         }
1600
1601         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1602                  "%s", card->name);
1603         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1604                  "%s", card->long_name ? card->long_name : card->name);
1605         snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1606                  "%s", card->driver_name ? card->driver_name : card->name);
1607         for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1608                 switch (card->snd_card->driver[i]) {
1609                 case '_':
1610                 case '-':
1611                 case '\0':
1612                         break;
1613                 default:
1614                         if (!isalnum(card->snd_card->driver[i]))
1615                                 card->snd_card->driver[i] = '_';
1616                         break;
1617                 }
1618         }
1619
1620         if (card->late_probe) {
1621                 ret = card->late_probe(card);
1622                 if (ret < 0) {
1623                         dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1624                                 card->name, ret);
1625                         goto probe_aux_dev_err;
1626                 }
1627         }
1628
1629         if (card->fully_routed)
1630                 snd_soc_dapm_auto_nc_pins(card);
1631
1632         snd_soc_dapm_new_widgets(card);
1633
1634         ret = snd_card_register(card->snd_card);
1635         if (ret < 0) {
1636                 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1637                                 ret);
1638                 goto probe_aux_dev_err;
1639         }
1640
1641         card->instantiated = 1;
1642         snd_soc_dapm_sync(&card->dapm);
1643         mutex_unlock(&card->mutex);
1644
1645         return 0;
1646
1647 probe_aux_dev_err:
1648         for (i = 0; i < card->num_aux_devs; i++)
1649                 soc_remove_aux_dev(card, i);
1650
1651 probe_dai_err:
1652         soc_remove_dai_links(card);
1653
1654 card_probe_error:
1655         if (card->remove)
1656                 card->remove(card);
1657
1658         snd_card_free(card->snd_card);
1659
1660 base_error:
1661         mutex_unlock(&card->mutex);
1662
1663         return ret;
1664 }
1665
1666 /* probes a new socdev */
1667 static int soc_probe(struct platform_device *pdev)
1668 {
1669         struct snd_soc_card *card = platform_get_drvdata(pdev);
1670
1671         /*
1672          * no card, so machine driver should be registering card
1673          * we should not be here in that case so ret error
1674          */
1675         if (!card)
1676                 return -EINVAL;
1677
1678         dev_warn(&pdev->dev,
1679                  "ASoC: machine %s should use snd_soc_register_card()\n",
1680                  card->name);
1681
1682         /* Bodge while we unpick instantiation */
1683         card->dev = &pdev->dev;
1684
1685         return snd_soc_register_card(card);
1686 }
1687
1688 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1689 {
1690         int i;
1691
1692         /* make sure any delayed work runs */
1693         for (i = 0; i < card->num_rtd; i++) {
1694                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1695                 flush_delayed_work(&rtd->delayed_work);
1696         }
1697
1698         /* remove auxiliary devices */
1699         for (i = 0; i < card->num_aux_devs; i++)
1700                 soc_remove_aux_dev(card, i);
1701
1702         /* remove and free each DAI */
1703         soc_remove_dai_links(card);
1704
1705         soc_cleanup_card_debugfs(card);
1706
1707         /* remove the card */
1708         if (card->remove)
1709                 card->remove(card);
1710
1711         snd_soc_dapm_free(&card->dapm);
1712
1713         snd_card_free(card->snd_card);
1714         return 0;
1715
1716 }
1717
1718 /* removes a socdev */
1719 static int soc_remove(struct platform_device *pdev)
1720 {
1721         struct snd_soc_card *card = platform_get_drvdata(pdev);
1722
1723         snd_soc_unregister_card(card);
1724         return 0;
1725 }
1726
1727 int snd_soc_poweroff(struct device *dev)
1728 {
1729         struct snd_soc_card *card = dev_get_drvdata(dev);
1730         int i;
1731
1732         if (!card->instantiated)
1733                 return 0;
1734
1735         /* Flush out pmdown_time work - we actually do want to run it
1736          * now, we're shutting down so no imminent restart. */
1737         for (i = 0; i < card->num_rtd; i++) {
1738                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1739                 flush_delayed_work(&rtd->delayed_work);
1740         }
1741
1742         snd_soc_dapm_shutdown(card);
1743
1744         /* deactivate pins to sleep state */
1745         for (i = 0; i < card->num_rtd; i++) {
1746                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1747                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1748                 int j;
1749
1750                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1751                 for (j = 0; j < rtd->num_codecs; j++) {
1752                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1753                         pinctrl_pm_select_sleep_state(codec_dai->dev);
1754                 }
1755         }
1756
1757         return 0;
1758 }
1759 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1760
1761 const struct dev_pm_ops snd_soc_pm_ops = {
1762         .suspend = snd_soc_suspend,
1763         .resume = snd_soc_resume,
1764         .freeze = snd_soc_suspend,
1765         .thaw = snd_soc_resume,
1766         .poweroff = snd_soc_poweroff,
1767         .restore = snd_soc_resume,
1768 };
1769 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1770
1771 /* ASoC platform driver */
1772 static struct platform_driver soc_driver = {
1773         .driver         = {
1774                 .name           = "soc-audio",
1775                 .pm             = &snd_soc_pm_ops,
1776         },
1777         .probe          = soc_probe,
1778         .remove         = soc_remove,
1779 };
1780
1781 /**
1782  * snd_soc_cnew - create new control
1783  * @_template: control template
1784  * @data: control private data
1785  * @long_name: control long name
1786  * @prefix: control name prefix
1787  *
1788  * Create a new mixer control from a template control.
1789  *
1790  * Returns 0 for success, else error.
1791  */
1792 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1793                                   void *data, const char *long_name,
1794                                   const char *prefix)
1795 {
1796         struct snd_kcontrol_new template;
1797         struct snd_kcontrol *kcontrol;
1798         char *name = NULL;
1799
1800         memcpy(&template, _template, sizeof(template));
1801         template.index = 0;
1802
1803         if (!long_name)
1804                 long_name = template.name;
1805
1806         if (prefix) {
1807                 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1808                 if (!name)
1809                         return NULL;
1810
1811                 template.name = name;
1812         } else {
1813                 template.name = long_name;
1814         }
1815
1816         kcontrol = snd_ctl_new1(&template, data);
1817
1818         kfree(name);
1819
1820         return kcontrol;
1821 }
1822 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1823
1824 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1825         const struct snd_kcontrol_new *controls, int num_controls,
1826         const char *prefix, void *data)
1827 {
1828         int err, i;
1829
1830         for (i = 0; i < num_controls; i++) {
1831                 const struct snd_kcontrol_new *control = &controls[i];
1832                 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1833                                                      control->name, prefix));
1834                 if (err < 0) {
1835                         dev_err(dev, "ASoC: Failed to add %s: %d\n",
1836                                 control->name, err);
1837                         return err;
1838                 }
1839         }
1840
1841         return 0;
1842 }
1843
1844 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1845                                                const char *name)
1846 {
1847         struct snd_card *card = soc_card->snd_card;
1848         struct snd_kcontrol *kctl;
1849
1850         if (unlikely(!name))
1851                 return NULL;
1852
1853         list_for_each_entry(kctl, &card->controls, list)
1854                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1855                         return kctl;
1856         return NULL;
1857 }
1858 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1859
1860 /**
1861  * snd_soc_add_component_controls - Add an array of controls to a component.
1862  *
1863  * @component: Component to add controls to
1864  * @controls: Array of controls to add
1865  * @num_controls: Number of elements in the array
1866  *
1867  * Return: 0 for success, else error.
1868  */
1869 int snd_soc_add_component_controls(struct snd_soc_component *component,
1870         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1871 {
1872         struct snd_card *card = component->card->snd_card;
1873
1874         return snd_soc_add_controls(card, component->dev, controls,
1875                         num_controls, component->name_prefix, component);
1876 }
1877 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1878
1879 /**
1880  * snd_soc_add_codec_controls - add an array of controls to a codec.
1881  * Convenience function to add a list of controls. Many codecs were
1882  * duplicating this code.
1883  *
1884  * @codec: codec to add controls to
1885  * @controls: array of controls to add
1886  * @num_controls: number of elements in the array
1887  *
1888  * Return 0 for success, else error.
1889  */
1890 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1891         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1892 {
1893         return snd_soc_add_component_controls(&codec->component, controls,
1894                 num_controls);
1895 }
1896 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1897
1898 /**
1899  * snd_soc_add_platform_controls - add an array of controls to a platform.
1900  * Convenience function to add a list of controls.
1901  *
1902  * @platform: platform to add controls to
1903  * @controls: array of controls to add
1904  * @num_controls: number of elements in the array
1905  *
1906  * Return 0 for success, else error.
1907  */
1908 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1909         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1910 {
1911         return snd_soc_add_component_controls(&platform->component, controls,
1912                 num_controls);
1913 }
1914 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1915
1916 /**
1917  * snd_soc_add_card_controls - add an array of controls to a SoC card.
1918  * Convenience function to add a list of controls.
1919  *
1920  * @soc_card: SoC card to add controls to
1921  * @controls: array of controls to add
1922  * @num_controls: number of elements in the array
1923  *
1924  * Return 0 for success, else error.
1925  */
1926 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1927         const struct snd_kcontrol_new *controls, int num_controls)
1928 {
1929         struct snd_card *card = soc_card->snd_card;
1930
1931         return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
1932                         NULL, soc_card);
1933 }
1934 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
1935
1936 /**
1937  * snd_soc_add_dai_controls - add an array of controls to a DAI.
1938  * Convienience function to add a list of controls.
1939  *
1940  * @dai: DAI to add controls to
1941  * @controls: array of controls to add
1942  * @num_controls: number of elements in the array
1943  *
1944  * Return 0 for success, else error.
1945  */
1946 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
1947         const struct snd_kcontrol_new *controls, int num_controls)
1948 {
1949         struct snd_card *card = dai->component->card->snd_card;
1950
1951         return snd_soc_add_controls(card, dai->dev, controls, num_controls,
1952                         NULL, dai);
1953 }
1954 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
1955
1956 /**
1957  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
1958  * @dai: DAI
1959  * @clk_id: DAI specific clock ID
1960  * @freq: new clock frequency in Hz
1961  * @dir: new clock direction - input/output.
1962  *
1963  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
1964  */
1965 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
1966         unsigned int freq, int dir)
1967 {
1968         if (dai->driver && dai->driver->ops->set_sysclk)
1969                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
1970         else if (dai->codec && dai->codec->driver->set_sysclk)
1971                 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
1972                                                       freq, dir);
1973         else
1974                 return -ENOTSUPP;
1975 }
1976 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
1977
1978 /**
1979  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
1980  * @codec: CODEC
1981  * @clk_id: DAI specific clock ID
1982  * @source: Source for the clock
1983  * @freq: new clock frequency in Hz
1984  * @dir: new clock direction - input/output.
1985  *
1986  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
1987  */
1988 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
1989                              int source, unsigned int freq, int dir)
1990 {
1991         if (codec->driver->set_sysclk)
1992                 return codec->driver->set_sysclk(codec, clk_id, source,
1993                                                  freq, dir);
1994         else
1995                 return -ENOTSUPP;
1996 }
1997 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
1998
1999 /**
2000  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2001  * @dai: DAI
2002  * @div_id: DAI specific clock divider ID
2003  * @div: new clock divisor.
2004  *
2005  * Configures the clock dividers. This is used to derive the best DAI bit and
2006  * frame clocks from the system or master clock. It's best to set the DAI bit
2007  * and frame clocks as low as possible to save system power.
2008  */
2009 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2010         int div_id, int div)
2011 {
2012         if (dai->driver && dai->driver->ops->set_clkdiv)
2013                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2014         else
2015                 return -EINVAL;
2016 }
2017 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2018
2019 /**
2020  * snd_soc_dai_set_pll - configure DAI PLL.
2021  * @dai: DAI
2022  * @pll_id: DAI specific PLL ID
2023  * @source: DAI specific source for the PLL
2024  * @freq_in: PLL input clock frequency in Hz
2025  * @freq_out: requested PLL output clock frequency in Hz
2026  *
2027  * Configures and enables PLL to generate output clock based on input clock.
2028  */
2029 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2030         unsigned int freq_in, unsigned int freq_out)
2031 {
2032         if (dai->driver && dai->driver->ops->set_pll)
2033                 return dai->driver->ops->set_pll(dai, pll_id, source,
2034                                          freq_in, freq_out);
2035         else if (dai->codec && dai->codec->driver->set_pll)
2036                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2037                                                    freq_in, freq_out);
2038         else
2039                 return -EINVAL;
2040 }
2041 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2042
2043 /*
2044  * snd_soc_codec_set_pll - configure codec PLL.
2045  * @codec: CODEC
2046  * @pll_id: DAI specific PLL ID
2047  * @source: DAI specific source for the PLL
2048  * @freq_in: PLL input clock frequency in Hz
2049  * @freq_out: requested PLL output clock frequency in Hz
2050  *
2051  * Configures and enables PLL to generate output clock based on input clock.
2052  */
2053 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2054                           unsigned int freq_in, unsigned int freq_out)
2055 {
2056         if (codec->driver->set_pll)
2057                 return codec->driver->set_pll(codec, pll_id, source,
2058                                               freq_in, freq_out);
2059         else
2060                 return -EINVAL;
2061 }
2062 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2063
2064 /**
2065  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2066  * @dai: DAI
2067  * @ratio Ratio of BCLK to Sample rate.
2068  *
2069  * Configures the DAI for a preset BCLK to sample rate ratio.
2070  */
2071 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2072 {
2073         if (dai->driver && dai->driver->ops->set_bclk_ratio)
2074                 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2075         else
2076                 return -EINVAL;
2077 }
2078 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2079
2080 /**
2081  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2082  * @dai: DAI
2083  * @fmt: SND_SOC_DAIFMT_ format value.
2084  *
2085  * Configures the DAI hardware format and clocking.
2086  */
2087 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2088 {
2089         if (dai->driver == NULL)
2090                 return -EINVAL;
2091         if (dai->driver->ops->set_fmt == NULL)
2092                 return -ENOTSUPP;
2093         return dai->driver->ops->set_fmt(dai, fmt);
2094 }
2095 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2096
2097 /**
2098  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2099  * @slots: Number of slots in use.
2100  * @tx_mask: bitmask representing active TX slots.
2101  * @rx_mask: bitmask representing active RX slots.
2102  *
2103  * Generates the TDM tx and rx slot default masks for DAI.
2104  */
2105 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2106                                           unsigned int *tx_mask,
2107                                           unsigned int *rx_mask)
2108 {
2109         if (*tx_mask || *rx_mask)
2110                 return 0;
2111
2112         if (!slots)
2113                 return -EINVAL;
2114
2115         *tx_mask = (1 << slots) - 1;
2116         *rx_mask = (1 << slots) - 1;
2117
2118         return 0;
2119 }
2120
2121 /**
2122  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2123  * @dai: DAI
2124  * @tx_mask: bitmask representing active TX slots.
2125  * @rx_mask: bitmask representing active RX slots.
2126  * @slots: Number of slots in use.
2127  * @slot_width: Width in bits for each slot.
2128  *
2129  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2130  * specific.
2131  */
2132 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2133         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2134 {
2135         if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2136                 dai->driver->ops->xlate_tdm_slot_mask(slots,
2137                                                 &tx_mask, &rx_mask);
2138         else
2139                 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2140
2141         dai->tx_mask = tx_mask;
2142         dai->rx_mask = rx_mask;
2143
2144         if (dai->driver && dai->driver->ops->set_tdm_slot)
2145                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2146                                 slots, slot_width);
2147         else
2148                 return -ENOTSUPP;
2149 }
2150 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2151
2152 /**
2153  * snd_soc_dai_set_channel_map - configure DAI audio channel map
2154  * @dai: DAI
2155  * @tx_num: how many TX channels
2156  * @tx_slot: pointer to an array which imply the TX slot number channel
2157  *           0~num-1 uses
2158  * @rx_num: how many RX channels
2159  * @rx_slot: pointer to an array which imply the RX slot number channel
2160  *           0~num-1 uses
2161  *
2162  * configure the relationship between channel number and TDM slot number.
2163  */
2164 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2165         unsigned int tx_num, unsigned int *tx_slot,
2166         unsigned int rx_num, unsigned int *rx_slot)
2167 {
2168         if (dai->driver && dai->driver->ops->set_channel_map)
2169                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2170                         rx_num, rx_slot);
2171         else
2172                 return -EINVAL;
2173 }
2174 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2175
2176 /**
2177  * snd_soc_dai_set_tristate - configure DAI system or master clock.
2178  * @dai: DAI
2179  * @tristate: tristate enable
2180  *
2181  * Tristates the DAI so that others can use it.
2182  */
2183 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2184 {
2185         if (dai->driver && dai->driver->ops->set_tristate)
2186                 return dai->driver->ops->set_tristate(dai, tristate);
2187         else
2188                 return -EINVAL;
2189 }
2190 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2191
2192 /**
2193  * snd_soc_dai_digital_mute - configure DAI system or master clock.
2194  * @dai: DAI
2195  * @mute: mute enable
2196  * @direction: stream to mute
2197  *
2198  * Mutes the DAI DAC.
2199  */
2200 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2201                              int direction)
2202 {
2203         if (!dai->driver)
2204                 return -ENOTSUPP;
2205
2206         if (dai->driver->ops->mute_stream)
2207                 return dai->driver->ops->mute_stream(dai, mute, direction);
2208         else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2209                  dai->driver->ops->digital_mute)
2210                 return dai->driver->ops->digital_mute(dai, mute);
2211         else
2212                 return -ENOTSUPP;
2213 }
2214 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2215
2216 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2217                                    struct snd_soc_dai_link *dai_link)
2218 {
2219         /* Legacy codec/codec_dai link is a single entry in multicodec */
2220         if (dai_link->codec_name || dai_link->codec_of_node ||
2221             dai_link->codec_dai_name) {
2222                 dai_link->num_codecs = 1;
2223
2224                 dai_link->codecs = devm_kzalloc(card->dev,
2225                                 sizeof(struct snd_soc_dai_link_component),
2226                                 GFP_KERNEL);
2227                 if (!dai_link->codecs)
2228                         return -ENOMEM;
2229
2230                 dai_link->codecs[0].name = dai_link->codec_name;
2231                 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2232                 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2233         }
2234
2235         if (!dai_link->codecs) {
2236                 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2237                 return -EINVAL;
2238         }
2239
2240         return 0;
2241 }
2242
2243 /**
2244  * snd_soc_register_card - Register a card with the ASoC core
2245  *
2246  * @card: Card to register
2247  *
2248  */
2249 int snd_soc_register_card(struct snd_soc_card *card)
2250 {
2251         int i, j, ret;
2252
2253         if (!card->name || !card->dev)
2254                 return -EINVAL;
2255
2256         for (i = 0; i < card->num_links; i++) {
2257                 struct snd_soc_dai_link *link = &card->dai_link[i];
2258
2259                 ret = snd_soc_init_multicodec(card, link);
2260                 if (ret) {
2261                         dev_err(card->dev, "ASoC: failed to init multicodec\n");
2262                         return ret;
2263                 }
2264
2265                 for (j = 0; j < link->num_codecs; j++) {
2266                         /*
2267                          * Codec must be specified by 1 of name or OF node,
2268                          * not both or neither.
2269                          */
2270                         if (!!link->codecs[j].name ==
2271                             !!link->codecs[j].of_node) {
2272                                 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2273                                         link->name);
2274                                 return -EINVAL;
2275                         }
2276                         /* Codec DAI name must be specified */
2277                         if (!link->codecs[j].dai_name) {
2278                                 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2279                                         link->name);
2280                                 return -EINVAL;
2281                         }
2282                 }
2283
2284                 /*
2285                  * Platform may be specified by either name or OF node, but
2286                  * can be left unspecified, and a dummy platform will be used.
2287                  */
2288                 if (link->platform_name && link->platform_of_node) {
2289                         dev_err(card->dev,
2290                                 "ASoC: Both platform name/of_node are set for %s\n",
2291                                 link->name);
2292                         return -EINVAL;
2293                 }
2294
2295                 /*
2296                  * CPU device may be specified by either name or OF node, but
2297                  * can be left unspecified, and will be matched based on DAI
2298                  * name alone..
2299                  */
2300                 if (link->cpu_name && link->cpu_of_node) {
2301                         dev_err(card->dev,
2302                                 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2303                                 link->name);
2304                         return -EINVAL;
2305                 }
2306                 /*
2307                  * At least one of CPU DAI name or CPU device name/node must be
2308                  * specified
2309                  */
2310                 if (!link->cpu_dai_name &&
2311                     !(link->cpu_name || link->cpu_of_node)) {
2312                         dev_err(card->dev,
2313                                 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2314                                 link->name);
2315                         return -EINVAL;
2316                 }
2317         }
2318
2319         dev_set_drvdata(card->dev, card);
2320
2321         snd_soc_initialize_card_lists(card);
2322
2323         soc_init_card_debugfs(card);
2324
2325         card->rtd = devm_kzalloc(card->dev,
2326                                  sizeof(struct snd_soc_pcm_runtime) *
2327                                  (card->num_links + card->num_aux_devs),
2328                                  GFP_KERNEL);
2329         if (card->rtd == NULL)
2330                 return -ENOMEM;
2331         card->num_rtd = 0;
2332         card->rtd_aux = &card->rtd[card->num_links];
2333
2334         for (i = 0; i < card->num_links; i++) {
2335                 card->rtd[i].card = card;
2336                 card->rtd[i].dai_link = &card->dai_link[i];
2337                 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2338                                         sizeof(struct snd_soc_dai *) *
2339                                         (card->rtd[i].dai_link->num_codecs),
2340                                         GFP_KERNEL);
2341                 if (card->rtd[i].codec_dais == NULL)
2342                         return -ENOMEM;
2343         }
2344
2345         for (i = 0; i < card->num_aux_devs; i++)
2346                 card->rtd_aux[i].card = card;
2347
2348         INIT_LIST_HEAD(&card->dapm_dirty);
2349         card->instantiated = 0;
2350         mutex_init(&card->mutex);
2351         mutex_init(&card->dapm_mutex);
2352
2353         ret = snd_soc_instantiate_card(card);
2354         if (ret != 0)
2355                 soc_cleanup_card_debugfs(card);
2356
2357         /* deactivate pins to sleep state */
2358         for (i = 0; i < card->num_rtd; i++) {
2359                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2360                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2361                 int j;
2362
2363                 for (j = 0; j < rtd->num_codecs; j++) {
2364                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2365                         if (!codec_dai->active)
2366                                 pinctrl_pm_select_sleep_state(codec_dai->dev);
2367                 }
2368
2369                 if (!cpu_dai->active)
2370                         pinctrl_pm_select_sleep_state(cpu_dai->dev);
2371         }
2372
2373         return ret;
2374 }
2375 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2376
2377 /**
2378  * snd_soc_unregister_card - Unregister a card with the ASoC core
2379  *
2380  * @card: Card to unregister
2381  *
2382  */
2383 int snd_soc_unregister_card(struct snd_soc_card *card)
2384 {
2385         if (card->instantiated) {
2386                 card->instantiated = false;
2387                 snd_soc_dapm_shutdown(card);
2388                 soc_cleanup_card_resources(card);
2389         }
2390         dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2391
2392         return 0;
2393 }
2394 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2395
2396 /*
2397  * Simplify DAI link configuration by removing ".-1" from device names
2398  * and sanitizing names.
2399  */
2400 static char *fmt_single_name(struct device *dev, int *id)
2401 {
2402         char *found, name[NAME_SIZE];
2403         int id1, id2;
2404
2405         if (dev_name(dev) == NULL)
2406                 return NULL;
2407
2408         strlcpy(name, dev_name(dev), NAME_SIZE);
2409
2410         /* are we a "%s.%d" name (platform and SPI components) */
2411         found = strstr(name, dev->driver->name);
2412         if (found) {
2413                 /* get ID */
2414                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2415
2416                         /* discard ID from name if ID == -1 */
2417                         if (*id == -1)
2418                                 found[strlen(dev->driver->name)] = '\0';
2419                 }
2420
2421         } else {
2422                 /* I2C component devices are named "bus-addr"  */
2423                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2424                         char tmp[NAME_SIZE];
2425
2426                         /* create unique ID number from I2C addr and bus */
2427                         *id = ((id1 & 0xffff) << 16) + id2;
2428
2429                         /* sanitize component name for DAI link creation */
2430                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2431                         strlcpy(name, tmp, NAME_SIZE);
2432                 } else
2433                         *id = 0;
2434         }
2435
2436         return kstrdup(name, GFP_KERNEL);
2437 }
2438
2439 /*
2440  * Simplify DAI link naming for single devices with multiple DAIs by removing
2441  * any ".-1" and using the DAI name (instead of device name).
2442  */
2443 static inline char *fmt_multiple_name(struct device *dev,
2444                 struct snd_soc_dai_driver *dai_drv)
2445 {
2446         if (dai_drv->name == NULL) {
2447                 dev_err(dev,
2448                         "ASoC: error - multiple DAI %s registered with no name\n",
2449                         dev_name(dev));
2450                 return NULL;
2451         }
2452
2453         return kstrdup(dai_drv->name, GFP_KERNEL);
2454 }
2455
2456 /**
2457  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2458  *
2459  * @component: The component for which the DAIs should be unregistered
2460  */
2461 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2462 {
2463         struct snd_soc_dai *dai, *_dai;
2464
2465         list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2466                 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2467                         dai->name);
2468                 list_del(&dai->list);
2469                 kfree(dai->name);
2470                 kfree(dai);
2471         }
2472 }
2473
2474 /**
2475  * snd_soc_register_dais - Register a DAI with the ASoC core
2476  *
2477  * @component: The component the DAIs are registered for
2478  * @dai_drv: DAI driver to use for the DAIs
2479  * @count: Number of DAIs
2480  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2481  *                     parent's name.
2482  */
2483 static int snd_soc_register_dais(struct snd_soc_component *component,
2484         struct snd_soc_dai_driver *dai_drv, size_t count,
2485         bool legacy_dai_naming)
2486 {
2487         struct device *dev = component->dev;
2488         struct snd_soc_dai *dai;
2489         unsigned int i;
2490         int ret;
2491
2492         dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2493
2494         component->dai_drv = dai_drv;
2495         component->num_dai = count;
2496
2497         for (i = 0; i < count; i++) {
2498
2499                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2500                 if (dai == NULL) {
2501                         ret = -ENOMEM;
2502                         goto err;
2503                 }
2504
2505                 /*
2506                  * Back in the old days when we still had component-less DAIs,
2507                  * instead of having a static name, component-less DAIs would
2508                  * inherit the name of the parent device so it is possible to
2509                  * register multiple instances of the DAI. We still need to keep
2510                  * the same naming style even though those DAIs are not
2511                  * component-less anymore.
2512                  */
2513                 if (count == 1 && legacy_dai_naming) {
2514                         dai->name = fmt_single_name(dev, &dai->id);
2515                 } else {
2516                         dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2517                         if (dai_drv[i].id)
2518                                 dai->id = dai_drv[i].id;
2519                         else
2520                                 dai->id = i;
2521                 }
2522                 if (dai->name == NULL) {
2523                         kfree(dai);
2524                         ret = -ENOMEM;
2525                         goto err;
2526                 }
2527
2528                 dai->component = component;
2529                 dai->dev = dev;
2530                 dai->driver = &dai_drv[i];
2531                 if (!dai->driver->ops)
2532                         dai->driver->ops = &null_dai_ops;
2533
2534                 list_add(&dai->list, &component->dai_list);
2535
2536                 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2537         }
2538
2539         return 0;
2540
2541 err:
2542         snd_soc_unregister_dais(component);
2543
2544         return ret;
2545 }
2546
2547 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2548         enum snd_soc_dapm_type type, int subseq)
2549 {
2550         struct snd_soc_component *component = dapm->component;
2551
2552         component->driver->seq_notifier(component, type, subseq);
2553 }
2554
2555 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2556         int event)
2557 {
2558         struct snd_soc_component *component = dapm->component;
2559
2560         return component->driver->stream_event(component, event);
2561 }
2562
2563 static int snd_soc_component_initialize(struct snd_soc_component *component,
2564         const struct snd_soc_component_driver *driver, struct device *dev)
2565 {
2566         struct snd_soc_dapm_context *dapm;
2567
2568         component->name = fmt_single_name(dev, &component->id);
2569         if (!component->name) {
2570                 dev_err(dev, "ASoC: Failed to allocate name\n");
2571                 return -ENOMEM;
2572         }
2573
2574         component->dev = dev;
2575         component->driver = driver;
2576         component->probe = component->driver->probe;
2577         component->remove = component->driver->remove;
2578
2579         if (!component->dapm_ptr)
2580                 component->dapm_ptr = &component->dapm;
2581
2582         dapm = component->dapm_ptr;
2583         dapm->dev = dev;
2584         dapm->component = component;
2585         dapm->bias_level = SND_SOC_BIAS_OFF;
2586         dapm->idle_bias_off = true;
2587         if (driver->seq_notifier)
2588                 dapm->seq_notifier = snd_soc_component_seq_notifier;
2589         if (driver->stream_event)
2590                 dapm->stream_event = snd_soc_component_stream_event;
2591
2592         component->controls = driver->controls;
2593         component->num_controls = driver->num_controls;
2594         component->dapm_widgets = driver->dapm_widgets;
2595         component->num_dapm_widgets = driver->num_dapm_widgets;
2596         component->dapm_routes = driver->dapm_routes;
2597         component->num_dapm_routes = driver->num_dapm_routes;
2598
2599         INIT_LIST_HEAD(&component->dai_list);
2600         mutex_init(&component->io_mutex);
2601
2602         return 0;
2603 }
2604
2605 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2606 {
2607         int val_bytes = regmap_get_val_bytes(component->regmap);
2608
2609         /* Errors are legitimate for non-integer byte multiples */
2610         if (val_bytes > 0)
2611                 component->val_bytes = val_bytes;
2612 }
2613
2614 #ifdef CONFIG_REGMAP
2615
2616 /**
2617  * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2618  * @component: The component for which to initialize the regmap instance
2619  * @regmap: The regmap instance that should be used by the component
2620  *
2621  * This function allows deferred assignment of the regmap instance that is
2622  * associated with the component. Only use this if the regmap instance is not
2623  * yet ready when the component is registered. The function must also be called
2624  * before the first IO attempt of the component.
2625  */
2626 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2627         struct regmap *regmap)
2628 {
2629         component->regmap = regmap;
2630         snd_soc_component_setup_regmap(component);
2631 }
2632 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2633
2634 /**
2635  * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2636  * @component: The component for which to de-initialize the regmap instance
2637  *
2638  * Calls regmap_exit() on the regmap instance associated to the component and
2639  * removes the regmap instance from the component.
2640  *
2641  * This function should only be used if snd_soc_component_init_regmap() was used
2642  * to initialize the regmap instance.
2643  */
2644 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2645 {
2646         regmap_exit(component->regmap);
2647         component->regmap = NULL;
2648 }
2649 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2650
2651 #endif
2652
2653 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2654 {
2655         if (!component->write && !component->read) {
2656                 if (!component->regmap)
2657                         component->regmap = dev_get_regmap(component->dev, NULL);
2658                 if (component->regmap)
2659                         snd_soc_component_setup_regmap(component);
2660         }
2661
2662         list_add(&component->list, &component_list);
2663 }
2664
2665 static void snd_soc_component_add(struct snd_soc_component *component)
2666 {
2667         mutex_lock(&client_mutex);
2668         snd_soc_component_add_unlocked(component);
2669         mutex_unlock(&client_mutex);
2670 }
2671
2672 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2673 {
2674         snd_soc_unregister_dais(component);
2675         kfree(component->name);
2676 }
2677
2678 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2679 {
2680         list_del(&component->list);
2681 }
2682
2683 static void snd_soc_component_del(struct snd_soc_component *component)
2684 {
2685         mutex_lock(&client_mutex);
2686         snd_soc_component_del_unlocked(component);
2687         mutex_unlock(&client_mutex);
2688 }
2689
2690 int snd_soc_register_component(struct device *dev,
2691                                const struct snd_soc_component_driver *cmpnt_drv,
2692                                struct snd_soc_dai_driver *dai_drv,
2693                                int num_dai)
2694 {
2695         struct snd_soc_component *cmpnt;
2696         int ret;
2697
2698         cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2699         if (!cmpnt) {
2700                 dev_err(dev, "ASoC: Failed to allocate memory\n");
2701                 return -ENOMEM;
2702         }
2703
2704         ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2705         if (ret)
2706                 goto err_free;
2707
2708         cmpnt->ignore_pmdown_time = true;
2709         cmpnt->registered_as_component = true;
2710
2711         ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2712         if (ret < 0) {
2713                 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
2714                 goto err_cleanup;
2715         }
2716
2717         snd_soc_component_add(cmpnt);
2718
2719         return 0;
2720
2721 err_cleanup:
2722         snd_soc_component_cleanup(cmpnt);
2723 err_free:
2724         kfree(cmpnt);
2725         return ret;
2726 }
2727 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2728
2729 /**
2730  * snd_soc_unregister_component - Unregister a component from the ASoC core
2731  *
2732  */
2733 void snd_soc_unregister_component(struct device *dev)
2734 {
2735         struct snd_soc_component *cmpnt;
2736
2737         list_for_each_entry(cmpnt, &component_list, list) {
2738                 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2739                         goto found;
2740         }
2741         return;
2742
2743 found:
2744         snd_soc_component_del(cmpnt);
2745         snd_soc_component_cleanup(cmpnt);
2746         kfree(cmpnt);
2747 }
2748 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2749
2750 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2751 {
2752         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2753
2754         return platform->driver->probe(platform);
2755 }
2756
2757 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2758 {
2759         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2760
2761         platform->driver->remove(platform);
2762 }
2763
2764 /**
2765  * snd_soc_add_platform - Add a platform to the ASoC core
2766  * @dev: The parent device for the platform
2767  * @platform: The platform to add
2768  * @platform_driver: The driver for the platform
2769  */
2770 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2771                 const struct snd_soc_platform_driver *platform_drv)
2772 {
2773         int ret;
2774
2775         ret = snd_soc_component_initialize(&platform->component,
2776                         &platform_drv->component_driver, dev);
2777         if (ret)
2778                 return ret;
2779
2780         platform->dev = dev;
2781         platform->driver = platform_drv;
2782
2783         if (platform_drv->probe)
2784                 platform->component.probe = snd_soc_platform_drv_probe;
2785         if (platform_drv->remove)
2786                 platform->component.remove = snd_soc_platform_drv_remove;
2787
2788 #ifdef CONFIG_DEBUG_FS
2789         platform->component.debugfs_prefix = "platform";
2790 #endif
2791
2792         mutex_lock(&client_mutex);
2793         snd_soc_component_add_unlocked(&platform->component);
2794         list_add(&platform->list, &platform_list);
2795         mutex_unlock(&client_mutex);
2796
2797         dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2798                 platform->component.name);
2799
2800         return 0;
2801 }
2802 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2803
2804 /**
2805  * snd_soc_register_platform - Register a platform with the ASoC core
2806  *
2807  * @platform: platform to register
2808  */
2809 int snd_soc_register_platform(struct device *dev,
2810                 const struct snd_soc_platform_driver *platform_drv)
2811 {
2812         struct snd_soc_platform *platform;
2813         int ret;
2814
2815         dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2816
2817         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2818         if (platform == NULL)
2819                 return -ENOMEM;
2820
2821         ret = snd_soc_add_platform(dev, platform, platform_drv);
2822         if (ret)
2823                 kfree(platform);
2824
2825         return ret;
2826 }
2827 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2828
2829 /**
2830  * snd_soc_remove_platform - Remove a platform from the ASoC core
2831  * @platform: the platform to remove
2832  */
2833 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2834 {
2835
2836         mutex_lock(&client_mutex);
2837         list_del(&platform->list);
2838         snd_soc_component_del_unlocked(&platform->component);
2839         mutex_unlock(&client_mutex);
2840
2841         dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2842                 platform->component.name);
2843
2844         snd_soc_component_cleanup(&platform->component);
2845 }
2846 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2847
2848 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2849 {
2850         struct snd_soc_platform *platform;
2851
2852         list_for_each_entry(platform, &platform_list, list) {
2853                 if (dev == platform->dev)
2854                         return platform;
2855         }
2856
2857         return NULL;
2858 }
2859 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2860
2861 /**
2862  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2863  *
2864  * @platform: platform to unregister
2865  */
2866 void snd_soc_unregister_platform(struct device *dev)
2867 {
2868         struct snd_soc_platform *platform;
2869
2870         platform = snd_soc_lookup_platform(dev);
2871         if (!platform)
2872                 return;
2873
2874         snd_soc_remove_platform(platform);
2875         kfree(platform);
2876 }
2877 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2878
2879 static u64 codec_format_map[] = {
2880         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2881         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2882         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2883         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2884         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2885         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2886         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2887         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2888         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2889         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2890         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2891         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2892         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2893         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2894         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2895         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2896 };
2897
2898 /* Fix up the DAI formats for endianness: codecs don't actually see
2899  * the endianness of the data but we're using the CPU format
2900  * definitions which do need to include endianness so we ensure that
2901  * codec DAIs always have both big and little endian variants set.
2902  */
2903 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2904 {
2905         int i;
2906
2907         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2908                 if (stream->formats & codec_format_map[i])
2909                         stream->formats |= codec_format_map[i];
2910 }
2911
2912 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2913 {
2914         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2915
2916         return codec->driver->probe(codec);
2917 }
2918
2919 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
2920 {
2921         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2922
2923         codec->driver->remove(codec);
2924 }
2925
2926 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
2927         unsigned int reg, unsigned int val)
2928 {
2929         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2930
2931         return codec->driver->write(codec, reg, val);
2932 }
2933
2934 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
2935         unsigned int reg, unsigned int *val)
2936 {
2937         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2938
2939         *val = codec->driver->read(codec, reg);
2940
2941         return 0;
2942 }
2943
2944 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
2945         enum snd_soc_bias_level level)
2946 {
2947         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
2948
2949         return codec->driver->set_bias_level(codec, level);
2950 }
2951
2952 /**
2953  * snd_soc_register_codec - Register a codec with the ASoC core
2954  *
2955  * @codec: codec to register
2956  */
2957 int snd_soc_register_codec(struct device *dev,
2958                            const struct snd_soc_codec_driver *codec_drv,
2959                            struct snd_soc_dai_driver *dai_drv,
2960                            int num_dai)
2961 {
2962         struct snd_soc_codec *codec;
2963         struct snd_soc_dai *dai;
2964         int ret, i;
2965
2966         dev_dbg(dev, "codec register %s\n", dev_name(dev));
2967
2968         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
2969         if (codec == NULL)
2970                 return -ENOMEM;
2971
2972         codec->component.dapm_ptr = &codec->dapm;
2973         codec->component.codec = codec;
2974
2975         ret = snd_soc_component_initialize(&codec->component,
2976                         &codec_drv->component_driver, dev);
2977         if (ret)
2978                 goto err_free;
2979
2980         if (codec_drv->controls) {
2981                 codec->component.controls = codec_drv->controls;
2982                 codec->component.num_controls = codec_drv->num_controls;
2983         }
2984         if (codec_drv->dapm_widgets) {
2985                 codec->component.dapm_widgets = codec_drv->dapm_widgets;
2986                 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
2987         }
2988         if (codec_drv->dapm_routes) {
2989                 codec->component.dapm_routes = codec_drv->dapm_routes;
2990                 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
2991         }
2992
2993         if (codec_drv->probe)
2994                 codec->component.probe = snd_soc_codec_drv_probe;
2995         if (codec_drv->remove)
2996                 codec->component.remove = snd_soc_codec_drv_remove;
2997         if (codec_drv->write)
2998                 codec->component.write = snd_soc_codec_drv_write;
2999         if (codec_drv->read)
3000                 codec->component.read = snd_soc_codec_drv_read;
3001         codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3002         codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3003         codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3004         if (codec_drv->seq_notifier)
3005                 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3006         if (codec_drv->set_bias_level)
3007                 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3008         codec->dev = dev;
3009         codec->driver = codec_drv;
3010         codec->component.val_bytes = codec_drv->reg_word_size;
3011
3012 #ifdef CONFIG_DEBUG_FS
3013         codec->component.init_debugfs = soc_init_codec_debugfs;
3014         codec->component.debugfs_prefix = "codec";
3015 #endif
3016
3017         if (codec_drv->get_regmap)
3018                 codec->component.regmap = codec_drv->get_regmap(dev);
3019
3020         for (i = 0; i < num_dai; i++) {
3021                 fixup_codec_formats(&dai_drv[i].playback);
3022                 fixup_codec_formats(&dai_drv[i].capture);
3023         }
3024
3025         ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3026         if (ret < 0) {
3027                 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
3028                 goto err_cleanup;
3029         }
3030
3031         list_for_each_entry(dai, &codec->component.dai_list, list)
3032                 dai->codec = codec;
3033
3034         mutex_lock(&client_mutex);
3035         snd_soc_component_add_unlocked(&codec->component);
3036         list_add(&codec->list, &codec_list);
3037         mutex_unlock(&client_mutex);
3038
3039         dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3040                 codec->component.name);
3041         return 0;
3042
3043 err_cleanup:
3044         snd_soc_component_cleanup(&codec->component);
3045 err_free:
3046         kfree(codec);
3047         return ret;
3048 }
3049 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3050
3051 /**
3052  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3053  *
3054  * @codec: codec to unregister
3055  */
3056 void snd_soc_unregister_codec(struct device *dev)
3057 {
3058         struct snd_soc_codec *codec;
3059
3060         list_for_each_entry(codec, &codec_list, list) {
3061                 if (dev == codec->dev)
3062                         goto found;
3063         }
3064         return;
3065
3066 found:
3067
3068         mutex_lock(&client_mutex);
3069         list_del(&codec->list);
3070         snd_soc_component_del_unlocked(&codec->component);
3071         mutex_unlock(&client_mutex);
3072
3073         dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3074                         codec->component.name);
3075
3076         snd_soc_component_cleanup(&codec->component);
3077         snd_soc_cache_exit(codec);
3078         kfree(codec);
3079 }
3080 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3081
3082 /* Retrieve a card's name from device tree */
3083 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3084                                const char *propname)
3085 {
3086         struct device_node *np;
3087         int ret;
3088
3089         if (!card->dev) {
3090                 pr_err("card->dev is not set before calling %s\n", __func__);
3091                 return -EINVAL;
3092         }
3093
3094         np = card->dev->of_node;
3095
3096         ret = of_property_read_string_index(np, propname, 0, &card->name);
3097         /*
3098          * EINVAL means the property does not exist. This is fine providing
3099          * card->name was previously set, which is checked later in
3100          * snd_soc_register_card.
3101          */
3102         if (ret < 0 && ret != -EINVAL) {
3103                 dev_err(card->dev,
3104                         "ASoC: Property '%s' could not be read: %d\n",
3105                         propname, ret);
3106                 return ret;
3107         }
3108
3109         return 0;
3110 }
3111 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3112
3113 static const struct snd_soc_dapm_widget simple_widgets[] = {
3114         SND_SOC_DAPM_MIC("Microphone", NULL),
3115         SND_SOC_DAPM_LINE("Line", NULL),
3116         SND_SOC_DAPM_HP("Headphone", NULL),
3117         SND_SOC_DAPM_SPK("Speaker", NULL),
3118 };
3119
3120 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3121                                           const char *propname)
3122 {
3123         struct device_node *np = card->dev->of_node;
3124         struct snd_soc_dapm_widget *widgets;
3125         const char *template, *wname;
3126         int i, j, num_widgets, ret;
3127
3128         num_widgets = of_property_count_strings(np, propname);
3129         if (num_widgets < 0) {
3130                 dev_err(card->dev,
3131                         "ASoC: Property '%s' does not exist\n", propname);
3132                 return -EINVAL;
3133         }
3134         if (num_widgets & 1) {
3135                 dev_err(card->dev,
3136                         "ASoC: Property '%s' length is not even\n", propname);
3137                 return -EINVAL;
3138         }
3139
3140         num_widgets /= 2;
3141         if (!num_widgets) {
3142                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3143                         propname);
3144                 return -EINVAL;
3145         }
3146
3147         widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3148                                GFP_KERNEL);
3149         if (!widgets) {
3150                 dev_err(card->dev,
3151                         "ASoC: Could not allocate memory for widgets\n");
3152                 return -ENOMEM;
3153         }
3154
3155         for (i = 0; i < num_widgets; i++) {
3156                 ret = of_property_read_string_index(np, propname,
3157                         2 * i, &template);
3158                 if (ret) {
3159                         dev_err(card->dev,
3160                                 "ASoC: Property '%s' index %d read error:%d\n",
3161                                 propname, 2 * i, ret);
3162                         return -EINVAL;
3163                 }
3164
3165                 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3166                         if (!strncmp(template, simple_widgets[j].name,
3167                                      strlen(simple_widgets[j].name))) {
3168                                 widgets[i] = simple_widgets[j];
3169                                 break;
3170                         }
3171                 }
3172
3173                 if (j >= ARRAY_SIZE(simple_widgets)) {
3174                         dev_err(card->dev,
3175                                 "ASoC: DAPM widget '%s' is not supported\n",
3176                                 template);
3177                         return -EINVAL;
3178                 }
3179
3180                 ret = of_property_read_string_index(np, propname,
3181                                                     (2 * i) + 1,
3182                                                     &wname);
3183                 if (ret) {
3184                         dev_err(card->dev,
3185                                 "ASoC: Property '%s' index %d read error:%d\n",
3186                                 propname, (2 * i) + 1, ret);
3187                         return -EINVAL;
3188                 }
3189
3190                 widgets[i].name = wname;
3191         }
3192
3193         card->dapm_widgets = widgets;
3194         card->num_dapm_widgets = num_widgets;
3195
3196         return 0;
3197 }
3198 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3199
3200 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3201                               unsigned int *slots,
3202                               unsigned int *slot_width)
3203 {
3204         u32 val;
3205         int ret;
3206
3207         if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3208                 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3209                 if (ret)
3210                         return ret;
3211
3212                 if (slots)
3213                         *slots = val;
3214         }
3215
3216         if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3217                 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3218                 if (ret)
3219                         return ret;
3220
3221                 if (slot_width)
3222                         *slot_width = val;
3223         }
3224
3225         return 0;
3226 }
3227 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3228
3229 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3230                                    const char *propname)
3231 {
3232         struct device_node *np = card->dev->of_node;
3233         int num_routes;
3234         struct snd_soc_dapm_route *routes;
3235         int i, ret;
3236
3237         num_routes = of_property_count_strings(np, propname);
3238         if (num_routes < 0 || num_routes & 1) {
3239                 dev_err(card->dev,
3240                         "ASoC: Property '%s' does not exist or its length is not even\n",
3241                         propname);
3242                 return -EINVAL;
3243         }
3244         num_routes /= 2;
3245         if (!num_routes) {
3246                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3247                         propname);
3248                 return -EINVAL;
3249         }
3250
3251         routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3252                               GFP_KERNEL);
3253         if (!routes) {
3254                 dev_err(card->dev,
3255                         "ASoC: Could not allocate DAPM route table\n");
3256                 return -EINVAL;
3257         }
3258
3259         for (i = 0; i < num_routes; i++) {
3260                 ret = of_property_read_string_index(np, propname,
3261                         2 * i, &routes[i].sink);
3262                 if (ret) {
3263                         dev_err(card->dev,
3264                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3265                                 propname, 2 * i, ret);
3266                         return -EINVAL;
3267                 }
3268                 ret = of_property_read_string_index(np, propname,
3269                         (2 * i) + 1, &routes[i].source);
3270                 if (ret) {
3271                         dev_err(card->dev,
3272                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3273                                 propname, (2 * i) + 1, ret);
3274                         return -EINVAL;
3275                 }
3276         }
3277
3278         card->num_dapm_routes = num_routes;
3279         card->dapm_routes = routes;
3280
3281         return 0;
3282 }
3283 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3284
3285 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3286                                      const char *prefix,
3287                                      struct device_node **bitclkmaster,
3288                                      struct device_node **framemaster)
3289 {
3290         int ret, i;
3291         char prop[128];
3292         unsigned int format = 0;
3293         int bit, frame;
3294         const char *str;
3295         struct {
3296                 char *name;
3297                 unsigned int val;
3298         } of_fmt_table[] = {
3299                 { "i2s",        SND_SOC_DAIFMT_I2S },
3300                 { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
3301                 { "left_j",     SND_SOC_DAIFMT_LEFT_J },
3302                 { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
3303                 { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
3304                 { "ac97",       SND_SOC_DAIFMT_AC97 },
3305                 { "pdm",        SND_SOC_DAIFMT_PDM},
3306                 { "msb",        SND_SOC_DAIFMT_MSB },
3307                 { "lsb",        SND_SOC_DAIFMT_LSB },
3308         };
3309
3310         if (!prefix)
3311                 prefix = "";
3312
3313         /*
3314          * check "[prefix]format = xxx"
3315          * SND_SOC_DAIFMT_FORMAT_MASK area
3316          */
3317         snprintf(prop, sizeof(prop), "%sformat", prefix);
3318         ret = of_property_read_string(np, prop, &str);
3319         if (ret == 0) {
3320                 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3321                         if (strcmp(str, of_fmt_table[i].name) == 0) {
3322                                 format |= of_fmt_table[i].val;
3323                                 break;
3324                         }
3325                 }
3326         }
3327
3328         /*
3329          * check "[prefix]continuous-clock"
3330          * SND_SOC_DAIFMT_CLOCK_MASK area
3331          */
3332         snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3333         if (of_get_property(np, prop, NULL))
3334                 format |= SND_SOC_DAIFMT_CONT;
3335         else
3336                 format |= SND_SOC_DAIFMT_GATED;
3337
3338         /*
3339          * check "[prefix]bitclock-inversion"
3340          * check "[prefix]frame-inversion"
3341          * SND_SOC_DAIFMT_INV_MASK area
3342          */
3343         snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3344         bit = !!of_get_property(np, prop, NULL);
3345
3346         snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3347         frame = !!of_get_property(np, prop, NULL);
3348
3349         switch ((bit << 4) + frame) {
3350         case 0x11:
3351                 format |= SND_SOC_DAIFMT_IB_IF;
3352                 break;
3353         case 0x10:
3354                 format |= SND_SOC_DAIFMT_IB_NF;
3355                 break;
3356         case 0x01:
3357                 format |= SND_SOC_DAIFMT_NB_IF;
3358                 break;
3359         default:
3360                 /* SND_SOC_DAIFMT_NB_NF is default */
3361                 break;
3362         }
3363
3364         /*
3365          * check "[prefix]bitclock-master"
3366          * check "[prefix]frame-master"
3367          * SND_SOC_DAIFMT_MASTER_MASK area
3368          */
3369         snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3370         bit = !!of_get_property(np, prop, NULL);
3371         if (bit && bitclkmaster)
3372                 *bitclkmaster = of_parse_phandle(np, prop, 0);
3373
3374         snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3375         frame = !!of_get_property(np, prop, NULL);
3376         if (frame && framemaster)
3377                 *framemaster = of_parse_phandle(np, prop, 0);
3378
3379         switch ((bit << 4) + frame) {
3380         case 0x11:
3381                 format |= SND_SOC_DAIFMT_CBM_CFM;
3382                 break;
3383         case 0x10:
3384                 format |= SND_SOC_DAIFMT_CBM_CFS;
3385                 break;
3386         case 0x01:
3387                 format |= SND_SOC_DAIFMT_CBS_CFM;
3388                 break;
3389         default:
3390                 format |= SND_SOC_DAIFMT_CBS_CFS;
3391                 break;
3392         }
3393
3394         return format;
3395 }
3396 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3397
3398 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3399                                 const char **dai_name)
3400 {
3401         struct snd_soc_component *pos;
3402         int ret = -EPROBE_DEFER;
3403
3404         mutex_lock(&client_mutex);
3405         list_for_each_entry(pos, &component_list, list) {
3406                 if (pos->dev->of_node != args->np)
3407                         continue;
3408
3409                 if (pos->driver->of_xlate_dai_name) {
3410                         ret = pos->driver->of_xlate_dai_name(pos,
3411                                                              args,
3412                                                              dai_name);
3413                 } else {
3414                         int id = -1;
3415
3416                         switch (args->args_count) {
3417                         case 0:
3418                                 id = 0; /* same as dai_drv[0] */
3419                                 break;
3420                         case 1:
3421                                 id = args->args[0];
3422                                 break;
3423                         default:
3424                                 /* not supported */
3425                                 break;
3426                         }
3427
3428                         if (id < 0 || id >= pos->num_dai) {
3429                                 ret = -EINVAL;
3430                                 continue;
3431                         }
3432
3433                         ret = 0;
3434
3435                         *dai_name = pos->dai_drv[id].name;
3436                         if (!*dai_name)
3437                                 *dai_name = pos->name;
3438                 }
3439
3440                 break;
3441         }
3442         mutex_unlock(&client_mutex);
3443         return ret;
3444 }
3445
3446 int snd_soc_of_get_dai_name(struct device_node *of_node,
3447                             const char **dai_name)
3448 {
3449         struct of_phandle_args args;
3450         int ret;
3451
3452         ret = of_parse_phandle_with_args(of_node, "sound-dai",
3453                                          "#sound-dai-cells", 0, &args);
3454         if (ret)
3455                 return ret;
3456
3457         ret = snd_soc_get_dai_name(&args, dai_name);
3458
3459         of_node_put(args.np);
3460
3461         return ret;
3462 }
3463 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3464
3465 /*
3466  * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3467  * @dev: Card device
3468  * @of_node: Device node
3469  * @dai_link: DAI link
3470  *
3471  * Builds an array of CODEC DAI components from the DAI link property
3472  * 'sound-dai'.
3473  * The array is set in the DAI link and the number of DAIs is set accordingly.
3474  * The device nodes in the array (of_node) must be dereferenced by the caller.
3475  *
3476  * Returns 0 for success
3477  */
3478 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3479                                    struct device_node *of_node,
3480                                    struct snd_soc_dai_link *dai_link)
3481 {
3482         struct of_phandle_args args;
3483         struct snd_soc_dai_link_component *component;
3484         char *name;
3485         int index, num_codecs, ret;
3486
3487         /* Count the number of CODECs */
3488         name = "sound-dai";
3489         num_codecs = of_count_phandle_with_args(of_node, name,
3490                                                 "#sound-dai-cells");
3491         if (num_codecs <= 0) {
3492                 if (num_codecs == -ENOENT)
3493                         dev_err(dev, "No 'sound-dai' property\n");
3494                 else
3495                         dev_err(dev, "Bad phandle in 'sound-dai'\n");
3496                 return num_codecs;
3497         }
3498         component = devm_kzalloc(dev,
3499                                  sizeof *component * num_codecs,
3500                                  GFP_KERNEL);
3501         if (!component)
3502                 return -ENOMEM;
3503         dai_link->codecs = component;
3504         dai_link->num_codecs = num_codecs;
3505
3506         /* Parse the list */
3507         for (index = 0, component = dai_link->codecs;
3508              index < dai_link->num_codecs;
3509              index++, component++) {
3510                 ret = of_parse_phandle_with_args(of_node, name,
3511                                                  "#sound-dai-cells",
3512                                                   index, &args);
3513                 if (ret)
3514                         goto err;
3515                 component->of_node = args.np;
3516                 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3517                 if (ret < 0)
3518                         goto err;
3519         }
3520         return 0;
3521 err:
3522         for (index = 0, component = dai_link->codecs;
3523              index < dai_link->num_codecs;
3524              index++, component++) {
3525                 if (!component->of_node)
3526                         break;
3527                 of_node_put(component->of_node);
3528                 component->of_node = NULL;
3529         }
3530         dai_link->codecs = NULL;
3531         dai_link->num_codecs = 0;
3532         return ret;
3533 }
3534 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3535
3536 static int __init snd_soc_init(void)
3537 {
3538 #ifdef CONFIG_DEBUG_FS
3539         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3540         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3541                 pr_warn("ASoC: Failed to create debugfs directory\n");
3542                 snd_soc_debugfs_root = NULL;
3543         }
3544
3545         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3546                                  &codec_list_fops))
3547                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3548
3549         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3550                                  &dai_list_fops))
3551                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3552
3553         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3554                                  &platform_list_fops))
3555                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3556 #endif
3557
3558         snd_soc_util_init();
3559
3560         return platform_driver_register(&soc_driver);
3561 }
3562 module_init(snd_soc_init);
3563
3564 static void __exit snd_soc_exit(void)
3565 {
3566         snd_soc_util_exit();
3567
3568 #ifdef CONFIG_DEBUG_FS
3569         debugfs_remove_recursive(snd_soc_debugfs_root);
3570 #endif
3571         platform_driver_unregister(&soc_driver);
3572 }
3573 module_exit(snd_soc_exit);
3574
3575 /* Module information */
3576 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3577 MODULE_DESCRIPTION("ALSA SoC Core");
3578 MODULE_LICENSE("GPL");
3579 MODULE_ALIAS("platform:soc-audio");