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                 .owner          = THIS_MODULE,
1776                 .pm             = &snd_soc_pm_ops,
1777         },
1778         .probe          = soc_probe,
1779         .remove         = soc_remove,
1780 };
1781
1782 /**
1783  * snd_soc_cnew - create new control
1784  * @_template: control template
1785  * @data: control private data
1786  * @long_name: control long name
1787  * @prefix: control name prefix
1788  *
1789  * Create a new mixer control from a template control.
1790  *
1791  * Returns 0 for success, else error.
1792  */
1793 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1794                                   void *data, const char *long_name,
1795                                   const char *prefix)
1796 {
1797         struct snd_kcontrol_new template;
1798         struct snd_kcontrol *kcontrol;
1799         char *name = NULL;
1800
1801         memcpy(&template, _template, sizeof(template));
1802         template.index = 0;
1803
1804         if (!long_name)
1805                 long_name = template.name;
1806
1807         if (prefix) {
1808                 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1809                 if (!name)
1810                         return NULL;
1811
1812                 template.name = name;
1813         } else {
1814                 template.name = long_name;
1815         }
1816
1817         kcontrol = snd_ctl_new1(&template, data);
1818
1819         kfree(name);
1820
1821         return kcontrol;
1822 }
1823 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1824
1825 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1826         const struct snd_kcontrol_new *controls, int num_controls,
1827         const char *prefix, void *data)
1828 {
1829         int err, i;
1830
1831         for (i = 0; i < num_controls; i++) {
1832                 const struct snd_kcontrol_new *control = &controls[i];
1833                 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1834                                                      control->name, prefix));
1835                 if (err < 0) {
1836                         dev_err(dev, "ASoC: Failed to add %s: %d\n",
1837                                 control->name, err);
1838                         return err;
1839                 }
1840         }
1841
1842         return 0;
1843 }
1844
1845 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1846                                                const char *name)
1847 {
1848         struct snd_card *card = soc_card->snd_card;
1849         struct snd_kcontrol *kctl;
1850
1851         if (unlikely(!name))
1852                 return NULL;
1853
1854         list_for_each_entry(kctl, &card->controls, list)
1855                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1856                         return kctl;
1857         return NULL;
1858 }
1859 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1860
1861 /**
1862  * snd_soc_add_component_controls - Add an array of controls to a component.
1863  *
1864  * @component: Component to add controls to
1865  * @controls: Array of controls to add
1866  * @num_controls: Number of elements in the array
1867  *
1868  * Return: 0 for success, else error.
1869  */
1870 int snd_soc_add_component_controls(struct snd_soc_component *component,
1871         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1872 {
1873         struct snd_card *card = component->card->snd_card;
1874
1875         return snd_soc_add_controls(card, component->dev, controls,
1876                         num_controls, component->name_prefix, component);
1877 }
1878 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1879
1880 /**
1881  * snd_soc_add_codec_controls - add an array of controls to a codec.
1882  * Convenience function to add a list of controls. Many codecs were
1883  * duplicating this code.
1884  *
1885  * @codec: codec to add controls to
1886  * @controls: array of controls to add
1887  * @num_controls: number of elements in the array
1888  *
1889  * Return 0 for success, else error.
1890  */
1891 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1892         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1893 {
1894         return snd_soc_add_component_controls(&codec->component, controls,
1895                 num_controls);
1896 }
1897 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1898
1899 /**
1900  * snd_soc_add_platform_controls - add an array of controls to a platform.
1901  * Convenience function to add a list of controls.
1902  *
1903  * @platform: platform to add controls to
1904  * @controls: array of controls to add
1905  * @num_controls: number of elements in the array
1906  *
1907  * Return 0 for success, else error.
1908  */
1909 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1910         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1911 {
1912         return snd_soc_add_component_controls(&platform->component, controls,
1913                 num_controls);
1914 }
1915 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1916
1917 /**
1918  * snd_soc_add_card_controls - add an array of controls to a SoC card.
1919  * Convenience function to add a list of controls.
1920  *
1921  * @soc_card: SoC card to add controls to
1922  * @controls: array of controls to add
1923  * @num_controls: number of elements in the array
1924  *
1925  * Return 0 for success, else error.
1926  */
1927 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1928         const struct snd_kcontrol_new *controls, int num_controls)
1929 {
1930         struct snd_card *card = soc_card->snd_card;
1931
1932         return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
1933                         NULL, soc_card);
1934 }
1935 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
1936
1937 /**
1938  * snd_soc_add_dai_controls - add an array of controls to a DAI.
1939  * Convienience function to add a list of controls.
1940  *
1941  * @dai: DAI to add controls to
1942  * @controls: array of controls to add
1943  * @num_controls: number of elements in the array
1944  *
1945  * Return 0 for success, else error.
1946  */
1947 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
1948         const struct snd_kcontrol_new *controls, int num_controls)
1949 {
1950         struct snd_card *card = dai->component->card->snd_card;
1951
1952         return snd_soc_add_controls(card, dai->dev, controls, num_controls,
1953                         NULL, dai);
1954 }
1955 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
1956
1957 /**
1958  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
1959  * @dai: DAI
1960  * @clk_id: DAI specific clock ID
1961  * @freq: new clock frequency in Hz
1962  * @dir: new clock direction - input/output.
1963  *
1964  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
1965  */
1966 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
1967         unsigned int freq, int dir)
1968 {
1969         if (dai->driver && dai->driver->ops->set_sysclk)
1970                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
1971         else if (dai->codec && dai->codec->driver->set_sysclk)
1972                 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
1973                                                       freq, dir);
1974         else
1975                 return -ENOTSUPP;
1976 }
1977 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
1978
1979 /**
1980  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
1981  * @codec: CODEC
1982  * @clk_id: DAI specific clock ID
1983  * @source: Source for the clock
1984  * @freq: new clock frequency in Hz
1985  * @dir: new clock direction - input/output.
1986  *
1987  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
1988  */
1989 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
1990                              int source, unsigned int freq, int dir)
1991 {
1992         if (codec->driver->set_sysclk)
1993                 return codec->driver->set_sysclk(codec, clk_id, source,
1994                                                  freq, dir);
1995         else
1996                 return -ENOTSUPP;
1997 }
1998 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
1999
2000 /**
2001  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2002  * @dai: DAI
2003  * @div_id: DAI specific clock divider ID
2004  * @div: new clock divisor.
2005  *
2006  * Configures the clock dividers. This is used to derive the best DAI bit and
2007  * frame clocks from the system or master clock. It's best to set the DAI bit
2008  * and frame clocks as low as possible to save system power.
2009  */
2010 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2011         int div_id, int div)
2012 {
2013         if (dai->driver && dai->driver->ops->set_clkdiv)
2014                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2015         else
2016                 return -EINVAL;
2017 }
2018 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2019
2020 /**
2021  * snd_soc_dai_set_pll - configure DAI PLL.
2022  * @dai: DAI
2023  * @pll_id: DAI specific PLL ID
2024  * @source: DAI specific source for the PLL
2025  * @freq_in: PLL input clock frequency in Hz
2026  * @freq_out: requested PLL output clock frequency in Hz
2027  *
2028  * Configures and enables PLL to generate output clock based on input clock.
2029  */
2030 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2031         unsigned int freq_in, unsigned int freq_out)
2032 {
2033         if (dai->driver && dai->driver->ops->set_pll)
2034                 return dai->driver->ops->set_pll(dai, pll_id, source,
2035                                          freq_in, freq_out);
2036         else if (dai->codec && dai->codec->driver->set_pll)
2037                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2038                                                    freq_in, freq_out);
2039         else
2040                 return -EINVAL;
2041 }
2042 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2043
2044 /*
2045  * snd_soc_codec_set_pll - configure codec PLL.
2046  * @codec: CODEC
2047  * @pll_id: DAI specific PLL ID
2048  * @source: DAI specific source for the PLL
2049  * @freq_in: PLL input clock frequency in Hz
2050  * @freq_out: requested PLL output clock frequency in Hz
2051  *
2052  * Configures and enables PLL to generate output clock based on input clock.
2053  */
2054 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2055                           unsigned int freq_in, unsigned int freq_out)
2056 {
2057         if (codec->driver->set_pll)
2058                 return codec->driver->set_pll(codec, pll_id, source,
2059                                               freq_in, freq_out);
2060         else
2061                 return -EINVAL;
2062 }
2063 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2064
2065 /**
2066  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2067  * @dai: DAI
2068  * @ratio Ratio of BCLK to Sample rate.
2069  *
2070  * Configures the DAI for a preset BCLK to sample rate ratio.
2071  */
2072 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2073 {
2074         if (dai->driver && dai->driver->ops->set_bclk_ratio)
2075                 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2076         else
2077                 return -EINVAL;
2078 }
2079 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2080
2081 /**
2082  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2083  * @dai: DAI
2084  * @fmt: SND_SOC_DAIFMT_ format value.
2085  *
2086  * Configures the DAI hardware format and clocking.
2087  */
2088 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2089 {
2090         if (dai->driver == NULL)
2091                 return -EINVAL;
2092         if (dai->driver->ops->set_fmt == NULL)
2093                 return -ENOTSUPP;
2094         return dai->driver->ops->set_fmt(dai, fmt);
2095 }
2096 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2097
2098 /**
2099  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2100  * @slots: Number of slots in use.
2101  * @tx_mask: bitmask representing active TX slots.
2102  * @rx_mask: bitmask representing active RX slots.
2103  *
2104  * Generates the TDM tx and rx slot default masks for DAI.
2105  */
2106 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2107                                           unsigned int *tx_mask,
2108                                           unsigned int *rx_mask)
2109 {
2110         if (*tx_mask || *rx_mask)
2111                 return 0;
2112
2113         if (!slots)
2114                 return -EINVAL;
2115
2116         *tx_mask = (1 << slots) - 1;
2117         *rx_mask = (1 << slots) - 1;
2118
2119         return 0;
2120 }
2121
2122 /**
2123  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2124  * @dai: DAI
2125  * @tx_mask: bitmask representing active TX slots.
2126  * @rx_mask: bitmask representing active RX slots.
2127  * @slots: Number of slots in use.
2128  * @slot_width: Width in bits for each slot.
2129  *
2130  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2131  * specific.
2132  */
2133 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2134         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2135 {
2136         if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2137                 dai->driver->ops->xlate_tdm_slot_mask(slots,
2138                                                 &tx_mask, &rx_mask);
2139         else
2140                 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2141
2142         dai->tx_mask = tx_mask;
2143         dai->rx_mask = rx_mask;
2144
2145         if (dai->driver && dai->driver->ops->set_tdm_slot)
2146                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2147                                 slots, slot_width);
2148         else
2149                 return -ENOTSUPP;
2150 }
2151 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2152
2153 /**
2154  * snd_soc_dai_set_channel_map - configure DAI audio channel map
2155  * @dai: DAI
2156  * @tx_num: how many TX channels
2157  * @tx_slot: pointer to an array which imply the TX slot number channel
2158  *           0~num-1 uses
2159  * @rx_num: how many RX channels
2160  * @rx_slot: pointer to an array which imply the RX slot number channel
2161  *           0~num-1 uses
2162  *
2163  * configure the relationship between channel number and TDM slot number.
2164  */
2165 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2166         unsigned int tx_num, unsigned int *tx_slot,
2167         unsigned int rx_num, unsigned int *rx_slot)
2168 {
2169         if (dai->driver && dai->driver->ops->set_channel_map)
2170                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2171                         rx_num, rx_slot);
2172         else
2173                 return -EINVAL;
2174 }
2175 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2176
2177 /**
2178  * snd_soc_dai_set_tristate - configure DAI system or master clock.
2179  * @dai: DAI
2180  * @tristate: tristate enable
2181  *
2182  * Tristates the DAI so that others can use it.
2183  */
2184 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2185 {
2186         if (dai->driver && dai->driver->ops->set_tristate)
2187                 return dai->driver->ops->set_tristate(dai, tristate);
2188         else
2189                 return -EINVAL;
2190 }
2191 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2192
2193 /**
2194  * snd_soc_dai_digital_mute - configure DAI system or master clock.
2195  * @dai: DAI
2196  * @mute: mute enable
2197  * @direction: stream to mute
2198  *
2199  * Mutes the DAI DAC.
2200  */
2201 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2202                              int direction)
2203 {
2204         if (!dai->driver)
2205                 return -ENOTSUPP;
2206
2207         if (dai->driver->ops->mute_stream)
2208                 return dai->driver->ops->mute_stream(dai, mute, direction);
2209         else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2210                  dai->driver->ops->digital_mute)
2211                 return dai->driver->ops->digital_mute(dai, mute);
2212         else
2213                 return -ENOTSUPP;
2214 }
2215 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2216
2217 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2218                                    struct snd_soc_dai_link *dai_link)
2219 {
2220         /* Legacy codec/codec_dai link is a single entry in multicodec */
2221         if (dai_link->codec_name || dai_link->codec_of_node ||
2222             dai_link->codec_dai_name) {
2223                 dai_link->num_codecs = 1;
2224
2225                 dai_link->codecs = devm_kzalloc(card->dev,
2226                                 sizeof(struct snd_soc_dai_link_component),
2227                                 GFP_KERNEL);
2228                 if (!dai_link->codecs)
2229                         return -ENOMEM;
2230
2231                 dai_link->codecs[0].name = dai_link->codec_name;
2232                 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2233                 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2234         }
2235
2236         if (!dai_link->codecs) {
2237                 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2238                 return -EINVAL;
2239         }
2240
2241         return 0;
2242 }
2243
2244 /**
2245  * snd_soc_register_card - Register a card with the ASoC core
2246  *
2247  * @card: Card to register
2248  *
2249  */
2250 int snd_soc_register_card(struct snd_soc_card *card)
2251 {
2252         int i, j, ret;
2253
2254         if (!card->name || !card->dev)
2255                 return -EINVAL;
2256
2257         for (i = 0; i < card->num_links; i++) {
2258                 struct snd_soc_dai_link *link = &card->dai_link[i];
2259
2260                 ret = snd_soc_init_multicodec(card, link);
2261                 if (ret) {
2262                         dev_err(card->dev, "ASoC: failed to init multicodec\n");
2263                         return ret;
2264                 }
2265
2266                 for (j = 0; j < link->num_codecs; j++) {
2267                         /*
2268                          * Codec must be specified by 1 of name or OF node,
2269                          * not both or neither.
2270                          */
2271                         if (!!link->codecs[j].name ==
2272                             !!link->codecs[j].of_node) {
2273                                 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2274                                         link->name);
2275                                 return -EINVAL;
2276                         }
2277                         /* Codec DAI name must be specified */
2278                         if (!link->codecs[j].dai_name) {
2279                                 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2280                                         link->name);
2281                                 return -EINVAL;
2282                         }
2283                 }
2284
2285                 /*
2286                  * Platform may be specified by either name or OF node, but
2287                  * can be left unspecified, and a dummy platform will be used.
2288                  */
2289                 if (link->platform_name && link->platform_of_node) {
2290                         dev_err(card->dev,
2291                                 "ASoC: Both platform name/of_node are set for %s\n",
2292                                 link->name);
2293                         return -EINVAL;
2294                 }
2295
2296                 /*
2297                  * CPU device may be specified by either name or OF node, but
2298                  * can be left unspecified, and will be matched based on DAI
2299                  * name alone..
2300                  */
2301                 if (link->cpu_name && link->cpu_of_node) {
2302                         dev_err(card->dev,
2303                                 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2304                                 link->name);
2305                         return -EINVAL;
2306                 }
2307                 /*
2308                  * At least one of CPU DAI name or CPU device name/node must be
2309                  * specified
2310                  */
2311                 if (!link->cpu_dai_name &&
2312                     !(link->cpu_name || link->cpu_of_node)) {
2313                         dev_err(card->dev,
2314                                 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2315                                 link->name);
2316                         return -EINVAL;
2317                 }
2318         }
2319
2320         dev_set_drvdata(card->dev, card);
2321
2322         snd_soc_initialize_card_lists(card);
2323
2324         soc_init_card_debugfs(card);
2325
2326         card->rtd = devm_kzalloc(card->dev,
2327                                  sizeof(struct snd_soc_pcm_runtime) *
2328                                  (card->num_links + card->num_aux_devs),
2329                                  GFP_KERNEL);
2330         if (card->rtd == NULL)
2331                 return -ENOMEM;
2332         card->num_rtd = 0;
2333         card->rtd_aux = &card->rtd[card->num_links];
2334
2335         for (i = 0; i < card->num_links; i++) {
2336                 card->rtd[i].card = card;
2337                 card->rtd[i].dai_link = &card->dai_link[i];
2338                 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2339                                         sizeof(struct snd_soc_dai *) *
2340                                         (card->rtd[i].dai_link->num_codecs),
2341                                         GFP_KERNEL);
2342                 if (card->rtd[i].codec_dais == NULL)
2343                         return -ENOMEM;
2344         }
2345
2346         for (i = 0; i < card->num_aux_devs; i++)
2347                 card->rtd_aux[i].card = card;
2348
2349         INIT_LIST_HEAD(&card->dapm_dirty);
2350         card->instantiated = 0;
2351         mutex_init(&card->mutex);
2352         mutex_init(&card->dapm_mutex);
2353
2354         ret = snd_soc_instantiate_card(card);
2355         if (ret != 0)
2356                 soc_cleanup_card_debugfs(card);
2357
2358         /* deactivate pins to sleep state */
2359         for (i = 0; i < card->num_rtd; i++) {
2360                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2361                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2362                 int j;
2363
2364                 for (j = 0; j < rtd->num_codecs; j++) {
2365                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2366                         if (!codec_dai->active)
2367                                 pinctrl_pm_select_sleep_state(codec_dai->dev);
2368                 }
2369
2370                 if (!cpu_dai->active)
2371                         pinctrl_pm_select_sleep_state(cpu_dai->dev);
2372         }
2373
2374         return ret;
2375 }
2376 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2377
2378 /**
2379  * snd_soc_unregister_card - Unregister a card with the ASoC core
2380  *
2381  * @card: Card to unregister
2382  *
2383  */
2384 int snd_soc_unregister_card(struct snd_soc_card *card)
2385 {
2386         if (card->instantiated) {
2387                 card->instantiated = false;
2388                 snd_soc_dapm_shutdown(card);
2389                 soc_cleanup_card_resources(card);
2390         }
2391         dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2392
2393         return 0;
2394 }
2395 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2396
2397 /*
2398  * Simplify DAI link configuration by removing ".-1" from device names
2399  * and sanitizing names.
2400  */
2401 static char *fmt_single_name(struct device *dev, int *id)
2402 {
2403         char *found, name[NAME_SIZE];
2404         int id1, id2;
2405
2406         if (dev_name(dev) == NULL)
2407                 return NULL;
2408
2409         strlcpy(name, dev_name(dev), NAME_SIZE);
2410
2411         /* are we a "%s.%d" name (platform and SPI components) */
2412         found = strstr(name, dev->driver->name);
2413         if (found) {
2414                 /* get ID */
2415                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2416
2417                         /* discard ID from name if ID == -1 */
2418                         if (*id == -1)
2419                                 found[strlen(dev->driver->name)] = '\0';
2420                 }
2421
2422         } else {
2423                 /* I2C component devices are named "bus-addr"  */
2424                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2425                         char tmp[NAME_SIZE];
2426
2427                         /* create unique ID number from I2C addr and bus */
2428                         *id = ((id1 & 0xffff) << 16) + id2;
2429
2430                         /* sanitize component name for DAI link creation */
2431                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2432                         strlcpy(name, tmp, NAME_SIZE);
2433                 } else
2434                         *id = 0;
2435         }
2436
2437         return kstrdup(name, GFP_KERNEL);
2438 }
2439
2440 /*
2441  * Simplify DAI link naming for single devices with multiple DAIs by removing
2442  * any ".-1" and using the DAI name (instead of device name).
2443  */
2444 static inline char *fmt_multiple_name(struct device *dev,
2445                 struct snd_soc_dai_driver *dai_drv)
2446 {
2447         if (dai_drv->name == NULL) {
2448                 dev_err(dev,
2449                         "ASoC: error - multiple DAI %s registered with no name\n",
2450                         dev_name(dev));
2451                 return NULL;
2452         }
2453
2454         return kstrdup(dai_drv->name, GFP_KERNEL);
2455 }
2456
2457 /**
2458  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2459  *
2460  * @component: The component for which the DAIs should be unregistered
2461  */
2462 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2463 {
2464         struct snd_soc_dai *dai, *_dai;
2465
2466         list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2467                 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2468                         dai->name);
2469                 list_del(&dai->list);
2470                 kfree(dai->name);
2471                 kfree(dai);
2472         }
2473 }
2474
2475 /**
2476  * snd_soc_register_dais - Register a DAI with the ASoC core
2477  *
2478  * @component: The component the DAIs are registered for
2479  * @dai_drv: DAI driver to use for the DAIs
2480  * @count: Number of DAIs
2481  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2482  *                     parent's name.
2483  */
2484 static int snd_soc_register_dais(struct snd_soc_component *component,
2485         struct snd_soc_dai_driver *dai_drv, size_t count,
2486         bool legacy_dai_naming)
2487 {
2488         struct device *dev = component->dev;
2489         struct snd_soc_dai *dai;
2490         unsigned int i;
2491         int ret;
2492
2493         dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2494
2495         component->dai_drv = dai_drv;
2496         component->num_dai = count;
2497
2498         for (i = 0; i < count; i++) {
2499
2500                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2501                 if (dai == NULL) {
2502                         ret = -ENOMEM;
2503                         goto err;
2504                 }
2505
2506                 /*
2507                  * Back in the old days when we still had component-less DAIs,
2508                  * instead of having a static name, component-less DAIs would
2509                  * inherit the name of the parent device so it is possible to
2510                  * register multiple instances of the DAI. We still need to keep
2511                  * the same naming style even though those DAIs are not
2512                  * component-less anymore.
2513                  */
2514                 if (count == 1 && legacy_dai_naming) {
2515                         dai->name = fmt_single_name(dev, &dai->id);
2516                 } else {
2517                         dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2518                         if (dai_drv[i].id)
2519                                 dai->id = dai_drv[i].id;
2520                         else
2521                                 dai->id = i;
2522                 }
2523                 if (dai->name == NULL) {
2524                         kfree(dai);
2525                         ret = -ENOMEM;
2526                         goto err;
2527                 }
2528
2529                 dai->component = component;
2530                 dai->dev = dev;
2531                 dai->driver = &dai_drv[i];
2532                 if (!dai->driver->ops)
2533                         dai->driver->ops = &null_dai_ops;
2534
2535                 list_add(&dai->list, &component->dai_list);
2536
2537                 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2538         }
2539
2540         return 0;
2541
2542 err:
2543         snd_soc_unregister_dais(component);
2544
2545         return ret;
2546 }
2547
2548 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2549         enum snd_soc_dapm_type type, int subseq)
2550 {
2551         struct snd_soc_component *component = dapm->component;
2552
2553         component->driver->seq_notifier(component, type, subseq);
2554 }
2555
2556 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2557         int event)
2558 {
2559         struct snd_soc_component *component = dapm->component;
2560
2561         return component->driver->stream_event(component, event);
2562 }
2563
2564 static int snd_soc_component_initialize(struct snd_soc_component *component,
2565         const struct snd_soc_component_driver *driver, struct device *dev)
2566 {
2567         struct snd_soc_dapm_context *dapm;
2568
2569         component->name = fmt_single_name(dev, &component->id);
2570         if (!component->name) {
2571                 dev_err(dev, "ASoC: Failed to allocate name\n");
2572                 return -ENOMEM;
2573         }
2574
2575         component->dev = dev;
2576         component->driver = driver;
2577         component->probe = component->driver->probe;
2578         component->remove = component->driver->remove;
2579
2580         if (!component->dapm_ptr)
2581                 component->dapm_ptr = &component->dapm;
2582
2583         dapm = component->dapm_ptr;
2584         dapm->dev = dev;
2585         dapm->component = component;
2586         dapm->bias_level = SND_SOC_BIAS_OFF;
2587         dapm->idle_bias_off = true;
2588         if (driver->seq_notifier)
2589                 dapm->seq_notifier = snd_soc_component_seq_notifier;
2590         if (driver->stream_event)
2591                 dapm->stream_event = snd_soc_component_stream_event;
2592
2593         component->controls = driver->controls;
2594         component->num_controls = driver->num_controls;
2595         component->dapm_widgets = driver->dapm_widgets;
2596         component->num_dapm_widgets = driver->num_dapm_widgets;
2597         component->dapm_routes = driver->dapm_routes;
2598         component->num_dapm_routes = driver->num_dapm_routes;
2599
2600         INIT_LIST_HEAD(&component->dai_list);
2601         mutex_init(&component->io_mutex);
2602
2603         return 0;
2604 }
2605
2606 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2607 {
2608         int val_bytes = regmap_get_val_bytes(component->regmap);
2609
2610         /* Errors are legitimate for non-integer byte multiples */
2611         if (val_bytes > 0)
2612                 component->val_bytes = val_bytes;
2613 }
2614
2615 #ifdef CONFIG_REGMAP
2616
2617 /**
2618  * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2619  * @component: The component for which to initialize the regmap instance
2620  * @regmap: The regmap instance that should be used by the component
2621  *
2622  * This function allows deferred assignment of the regmap instance that is
2623  * associated with the component. Only use this if the regmap instance is not
2624  * yet ready when the component is registered. The function must also be called
2625  * before the first IO attempt of the component.
2626  */
2627 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2628         struct regmap *regmap)
2629 {
2630         component->regmap = regmap;
2631         snd_soc_component_setup_regmap(component);
2632 }
2633 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2634
2635 /**
2636  * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2637  * @component: The component for which to de-initialize the regmap instance
2638  *
2639  * Calls regmap_exit() on the regmap instance associated to the component and
2640  * removes the regmap instance from the component.
2641  *
2642  * This function should only be used if snd_soc_component_init_regmap() was used
2643  * to initialize the regmap instance.
2644  */
2645 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2646 {
2647         regmap_exit(component->regmap);
2648         component->regmap = NULL;
2649 }
2650 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2651
2652 #endif
2653
2654 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2655 {
2656         if (!component->write && !component->read) {
2657                 if (!component->regmap)
2658                         component->regmap = dev_get_regmap(component->dev, NULL);
2659                 if (component->regmap)
2660                         snd_soc_component_setup_regmap(component);
2661         }
2662
2663         list_add(&component->list, &component_list);
2664 }
2665
2666 static void snd_soc_component_add(struct snd_soc_component *component)
2667 {
2668         mutex_lock(&client_mutex);
2669         snd_soc_component_add_unlocked(component);
2670         mutex_unlock(&client_mutex);
2671 }
2672
2673 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2674 {
2675         snd_soc_unregister_dais(component);
2676         kfree(component->name);
2677 }
2678
2679 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2680 {
2681         list_del(&component->list);
2682 }
2683
2684 static void snd_soc_component_del(struct snd_soc_component *component)
2685 {
2686         mutex_lock(&client_mutex);
2687         snd_soc_component_del_unlocked(component);
2688         mutex_unlock(&client_mutex);
2689 }
2690
2691 int snd_soc_register_component(struct device *dev,
2692                                const struct snd_soc_component_driver *cmpnt_drv,
2693                                struct snd_soc_dai_driver *dai_drv,
2694                                int num_dai)
2695 {
2696         struct snd_soc_component *cmpnt;
2697         int ret;
2698
2699         cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2700         if (!cmpnt) {
2701                 dev_err(dev, "ASoC: Failed to allocate memory\n");
2702                 return -ENOMEM;
2703         }
2704
2705         ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2706         if (ret)
2707                 goto err_free;
2708
2709         cmpnt->ignore_pmdown_time = true;
2710         cmpnt->registered_as_component = true;
2711
2712         ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2713         if (ret < 0) {
2714                 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
2715                 goto err_cleanup;
2716         }
2717
2718         snd_soc_component_add(cmpnt);
2719
2720         return 0;
2721
2722 err_cleanup:
2723         snd_soc_component_cleanup(cmpnt);
2724 err_free:
2725         kfree(cmpnt);
2726         return ret;
2727 }
2728 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2729
2730 /**
2731  * snd_soc_unregister_component - Unregister a component from the ASoC core
2732  *
2733  */
2734 void snd_soc_unregister_component(struct device *dev)
2735 {
2736         struct snd_soc_component *cmpnt;
2737
2738         list_for_each_entry(cmpnt, &component_list, list) {
2739                 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2740                         goto found;
2741         }
2742         return;
2743
2744 found:
2745         snd_soc_component_del(cmpnt);
2746         snd_soc_component_cleanup(cmpnt);
2747         kfree(cmpnt);
2748 }
2749 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2750
2751 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2752 {
2753         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2754
2755         return platform->driver->probe(platform);
2756 }
2757
2758 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2759 {
2760         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2761
2762         platform->driver->remove(platform);
2763 }
2764
2765 /**
2766  * snd_soc_add_platform - Add a platform to the ASoC core
2767  * @dev: The parent device for the platform
2768  * @platform: The platform to add
2769  * @platform_driver: The driver for the platform
2770  */
2771 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2772                 const struct snd_soc_platform_driver *platform_drv)
2773 {
2774         int ret;
2775
2776         ret = snd_soc_component_initialize(&platform->component,
2777                         &platform_drv->component_driver, dev);
2778         if (ret)
2779                 return ret;
2780
2781         platform->dev = dev;
2782         platform->driver = platform_drv;
2783
2784         if (platform_drv->probe)
2785                 platform->component.probe = snd_soc_platform_drv_probe;
2786         if (platform_drv->remove)
2787                 platform->component.remove = snd_soc_platform_drv_remove;
2788
2789 #ifdef CONFIG_DEBUG_FS
2790         platform->component.debugfs_prefix = "platform";
2791 #endif
2792
2793         mutex_lock(&client_mutex);
2794         snd_soc_component_add_unlocked(&platform->component);
2795         list_add(&platform->list, &platform_list);
2796         mutex_unlock(&client_mutex);
2797
2798         dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2799                 platform->component.name);
2800
2801         return 0;
2802 }
2803 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2804
2805 /**
2806  * snd_soc_register_platform - Register a platform with the ASoC core
2807  *
2808  * @platform: platform to register
2809  */
2810 int snd_soc_register_platform(struct device *dev,
2811                 const struct snd_soc_platform_driver *platform_drv)
2812 {
2813         struct snd_soc_platform *platform;
2814         int ret;
2815
2816         dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2817
2818         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2819         if (platform == NULL)
2820                 return -ENOMEM;
2821
2822         ret = snd_soc_add_platform(dev, platform, platform_drv);
2823         if (ret)
2824                 kfree(platform);
2825
2826         return ret;
2827 }
2828 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2829
2830 /**
2831  * snd_soc_remove_platform - Remove a platform from the ASoC core
2832  * @platform: the platform to remove
2833  */
2834 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2835 {
2836
2837         mutex_lock(&client_mutex);
2838         list_del(&platform->list);
2839         snd_soc_component_del_unlocked(&platform->component);
2840         mutex_unlock(&client_mutex);
2841
2842         dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2843                 platform->component.name);
2844
2845         snd_soc_component_cleanup(&platform->component);
2846 }
2847 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2848
2849 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2850 {
2851         struct snd_soc_platform *platform;
2852
2853         list_for_each_entry(platform, &platform_list, list) {
2854                 if (dev == platform->dev)
2855                         return platform;
2856         }
2857
2858         return NULL;
2859 }
2860 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2861
2862 /**
2863  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2864  *
2865  * @platform: platform to unregister
2866  */
2867 void snd_soc_unregister_platform(struct device *dev)
2868 {
2869         struct snd_soc_platform *platform;
2870
2871         platform = snd_soc_lookup_platform(dev);
2872         if (!platform)
2873                 return;
2874
2875         snd_soc_remove_platform(platform);
2876         kfree(platform);
2877 }
2878 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2879
2880 static u64 codec_format_map[] = {
2881         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2882         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2883         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2884         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2885         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2886         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2887         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2888         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2889         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2890         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2891         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2892         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2893         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2894         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2895         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2896         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2897 };
2898
2899 /* Fix up the DAI formats for endianness: codecs don't actually see
2900  * the endianness of the data but we're using the CPU format
2901  * definitions which do need to include endianness so we ensure that
2902  * codec DAIs always have both big and little endian variants set.
2903  */
2904 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2905 {
2906         int i;
2907
2908         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2909                 if (stream->formats & codec_format_map[i])
2910                         stream->formats |= codec_format_map[i];
2911 }
2912
2913 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2914 {
2915         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2916
2917         return codec->driver->probe(codec);
2918 }
2919
2920 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
2921 {
2922         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2923
2924         codec->driver->remove(codec);
2925 }
2926
2927 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
2928         unsigned int reg, unsigned int val)
2929 {
2930         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2931
2932         return codec->driver->write(codec, reg, val);
2933 }
2934
2935 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
2936         unsigned int reg, unsigned int *val)
2937 {
2938         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2939
2940         *val = codec->driver->read(codec, reg);
2941
2942         return 0;
2943 }
2944
2945 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
2946         enum snd_soc_bias_level level)
2947 {
2948         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
2949
2950         return codec->driver->set_bias_level(codec, level);
2951 }
2952
2953 /**
2954  * snd_soc_register_codec - Register a codec with the ASoC core
2955  *
2956  * @codec: codec to register
2957  */
2958 int snd_soc_register_codec(struct device *dev,
2959                            const struct snd_soc_codec_driver *codec_drv,
2960                            struct snd_soc_dai_driver *dai_drv,
2961                            int num_dai)
2962 {
2963         struct snd_soc_codec *codec;
2964         struct snd_soc_dai *dai;
2965         int ret, i;
2966
2967         dev_dbg(dev, "codec register %s\n", dev_name(dev));
2968
2969         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
2970         if (codec == NULL)
2971                 return -ENOMEM;
2972
2973         codec->component.dapm_ptr = &codec->dapm;
2974         codec->component.codec = codec;
2975
2976         ret = snd_soc_component_initialize(&codec->component,
2977                         &codec_drv->component_driver, dev);
2978         if (ret)
2979                 goto err_free;
2980
2981         if (codec_drv->controls) {
2982                 codec->component.controls = codec_drv->controls;
2983                 codec->component.num_controls = codec_drv->num_controls;
2984         }
2985         if (codec_drv->dapm_widgets) {
2986                 codec->component.dapm_widgets = codec_drv->dapm_widgets;
2987                 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
2988         }
2989         if (codec_drv->dapm_routes) {
2990                 codec->component.dapm_routes = codec_drv->dapm_routes;
2991                 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
2992         }
2993
2994         if (codec_drv->probe)
2995                 codec->component.probe = snd_soc_codec_drv_probe;
2996         if (codec_drv->remove)
2997                 codec->component.remove = snd_soc_codec_drv_remove;
2998         if (codec_drv->write)
2999                 codec->component.write = snd_soc_codec_drv_write;
3000         if (codec_drv->read)
3001                 codec->component.read = snd_soc_codec_drv_read;
3002         codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3003         codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3004         codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3005         if (codec_drv->seq_notifier)
3006                 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3007         if (codec_drv->set_bias_level)
3008                 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3009         codec->dev = dev;
3010         codec->driver = codec_drv;
3011         codec->component.val_bytes = codec_drv->reg_word_size;
3012
3013 #ifdef CONFIG_DEBUG_FS
3014         codec->component.init_debugfs = soc_init_codec_debugfs;
3015         codec->component.debugfs_prefix = "codec";
3016 #endif
3017
3018         if (codec_drv->get_regmap)
3019                 codec->component.regmap = codec_drv->get_regmap(dev);
3020
3021         for (i = 0; i < num_dai; i++) {
3022                 fixup_codec_formats(&dai_drv[i].playback);
3023                 fixup_codec_formats(&dai_drv[i].capture);
3024         }
3025
3026         ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3027         if (ret < 0) {
3028                 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
3029                 goto err_cleanup;
3030         }
3031
3032         list_for_each_entry(dai, &codec->component.dai_list, list)
3033                 dai->codec = codec;
3034
3035         mutex_lock(&client_mutex);
3036         snd_soc_component_add_unlocked(&codec->component);
3037         list_add(&codec->list, &codec_list);
3038         mutex_unlock(&client_mutex);
3039
3040         dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3041                 codec->component.name);
3042         return 0;
3043
3044 err_cleanup:
3045         snd_soc_component_cleanup(&codec->component);
3046 err_free:
3047         kfree(codec);
3048         return ret;
3049 }
3050 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3051
3052 /**
3053  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3054  *
3055  * @codec: codec to unregister
3056  */
3057 void snd_soc_unregister_codec(struct device *dev)
3058 {
3059         struct snd_soc_codec *codec;
3060
3061         list_for_each_entry(codec, &codec_list, list) {
3062                 if (dev == codec->dev)
3063                         goto found;
3064         }
3065         return;
3066
3067 found:
3068
3069         mutex_lock(&client_mutex);
3070         list_del(&codec->list);
3071         snd_soc_component_del_unlocked(&codec->component);
3072         mutex_unlock(&client_mutex);
3073
3074         dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3075                         codec->component.name);
3076
3077         snd_soc_component_cleanup(&codec->component);
3078         snd_soc_cache_exit(codec);
3079         kfree(codec);
3080 }
3081 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3082
3083 /* Retrieve a card's name from device tree */
3084 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3085                                const char *propname)
3086 {
3087         struct device_node *np;
3088         int ret;
3089
3090         if (!card->dev) {
3091                 pr_err("card->dev is not set before calling %s\n", __func__);
3092                 return -EINVAL;
3093         }
3094
3095         np = card->dev->of_node;
3096
3097         ret = of_property_read_string_index(np, propname, 0, &card->name);
3098         /*
3099          * EINVAL means the property does not exist. This is fine providing
3100          * card->name was previously set, which is checked later in
3101          * snd_soc_register_card.
3102          */
3103         if (ret < 0 && ret != -EINVAL) {
3104                 dev_err(card->dev,
3105                         "ASoC: Property '%s' could not be read: %d\n",
3106                         propname, ret);
3107                 return ret;
3108         }
3109
3110         return 0;
3111 }
3112 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3113
3114 static const struct snd_soc_dapm_widget simple_widgets[] = {
3115         SND_SOC_DAPM_MIC("Microphone", NULL),
3116         SND_SOC_DAPM_LINE("Line", NULL),
3117         SND_SOC_DAPM_HP("Headphone", NULL),
3118         SND_SOC_DAPM_SPK("Speaker", NULL),
3119 };
3120
3121 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3122                                           const char *propname)
3123 {
3124         struct device_node *np = card->dev->of_node;
3125         struct snd_soc_dapm_widget *widgets;
3126         const char *template, *wname;
3127         int i, j, num_widgets, ret;
3128
3129         num_widgets = of_property_count_strings(np, propname);
3130         if (num_widgets < 0) {
3131                 dev_err(card->dev,
3132                         "ASoC: Property '%s' does not exist\n", propname);
3133                 return -EINVAL;
3134         }
3135         if (num_widgets & 1) {
3136                 dev_err(card->dev,
3137                         "ASoC: Property '%s' length is not even\n", propname);
3138                 return -EINVAL;
3139         }
3140
3141         num_widgets /= 2;
3142         if (!num_widgets) {
3143                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3144                         propname);
3145                 return -EINVAL;
3146         }
3147
3148         widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3149                                GFP_KERNEL);
3150         if (!widgets) {
3151                 dev_err(card->dev,
3152                         "ASoC: Could not allocate memory for widgets\n");
3153                 return -ENOMEM;
3154         }
3155
3156         for (i = 0; i < num_widgets; i++) {
3157                 ret = of_property_read_string_index(np, propname,
3158                         2 * i, &template);
3159                 if (ret) {
3160                         dev_err(card->dev,
3161                                 "ASoC: Property '%s' index %d read error:%d\n",
3162                                 propname, 2 * i, ret);
3163                         return -EINVAL;
3164                 }
3165
3166                 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3167                         if (!strncmp(template, simple_widgets[j].name,
3168                                      strlen(simple_widgets[j].name))) {
3169                                 widgets[i] = simple_widgets[j];
3170                                 break;
3171                         }
3172                 }
3173
3174                 if (j >= ARRAY_SIZE(simple_widgets)) {
3175                         dev_err(card->dev,
3176                                 "ASoC: DAPM widget '%s' is not supported\n",
3177                                 template);
3178                         return -EINVAL;
3179                 }
3180
3181                 ret = of_property_read_string_index(np, propname,
3182                                                     (2 * i) + 1,
3183                                                     &wname);
3184                 if (ret) {
3185                         dev_err(card->dev,
3186                                 "ASoC: Property '%s' index %d read error:%d\n",
3187                                 propname, (2 * i) + 1, ret);
3188                         return -EINVAL;
3189                 }
3190
3191                 widgets[i].name = wname;
3192         }
3193
3194         card->dapm_widgets = widgets;
3195         card->num_dapm_widgets = num_widgets;
3196
3197         return 0;
3198 }
3199 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3200
3201 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3202                               unsigned int *slots,
3203                               unsigned int *slot_width)
3204 {
3205         u32 val;
3206         int ret;
3207
3208         if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3209                 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3210                 if (ret)
3211                         return ret;
3212
3213                 if (slots)
3214                         *slots = val;
3215         }
3216
3217         if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3218                 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3219                 if (ret)
3220                         return ret;
3221
3222                 if (slot_width)
3223                         *slot_width = val;
3224         }
3225
3226         return 0;
3227 }
3228 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3229
3230 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3231                                    const char *propname)
3232 {
3233         struct device_node *np = card->dev->of_node;
3234         int num_routes, old_routes;
3235         struct snd_soc_dapm_route *routes;
3236         int i, ret;
3237
3238         num_routes = of_property_count_strings(np, propname);
3239         if (num_routes < 0 || num_routes & 1) {
3240                 dev_err(card->dev,
3241                         "ASoC: Property '%s' does not exist or its length is not even\n",
3242                         propname);
3243                 return -EINVAL;
3244         }
3245         num_routes /= 2;
3246         if (!num_routes) {
3247                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3248                         propname);
3249                 return -EINVAL;
3250         }
3251
3252         old_routes = card->num_dapm_routes;
3253         routes = devm_kzalloc(card->dev,
3254                               (old_routes + num_routes) * sizeof(*routes),
3255                               GFP_KERNEL);
3256         if (!routes) {
3257                 dev_err(card->dev,
3258                         "ASoC: Could not allocate DAPM route table\n");
3259                 return -EINVAL;
3260         }
3261
3262         memcpy(routes, card->dapm_routes, old_routes * sizeof(*routes));
3263
3264         for (i = 0; i < num_routes; i++) {
3265                 ret = of_property_read_string_index(np, propname,
3266                         2 * i, &routes[old_routes + i].sink);
3267                 if (ret) {
3268                         dev_err(card->dev,
3269                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3270                                 propname, 2 * i, ret);
3271                         return -EINVAL;
3272                 }
3273                 ret = of_property_read_string_index(np, propname,
3274                         (2 * i) + 1, &routes[old_routes + i].source);
3275                 if (ret) {
3276                         dev_err(card->dev,
3277                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3278                                 propname, (2 * i) + 1, ret);
3279                         return -EINVAL;
3280                 }
3281         }
3282
3283         card->num_dapm_routes += num_routes;
3284         card->dapm_routes = routes;
3285
3286         return 0;
3287 }
3288 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3289
3290 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3291                                      const char *prefix,
3292                                      struct device_node **bitclkmaster,
3293                                      struct device_node **framemaster)
3294 {
3295         int ret, i;
3296         char prop[128];
3297         unsigned int format = 0;
3298         int bit, frame;
3299         const char *str;
3300         struct {
3301                 char *name;
3302                 unsigned int val;
3303         } of_fmt_table[] = {
3304                 { "i2s",        SND_SOC_DAIFMT_I2S },
3305                 { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
3306                 { "left_j",     SND_SOC_DAIFMT_LEFT_J },
3307                 { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
3308                 { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
3309                 { "ac97",       SND_SOC_DAIFMT_AC97 },
3310                 { "pdm",        SND_SOC_DAIFMT_PDM},
3311                 { "msb",        SND_SOC_DAIFMT_MSB },
3312                 { "lsb",        SND_SOC_DAIFMT_LSB },
3313         };
3314
3315         if (!prefix)
3316                 prefix = "";
3317
3318         /*
3319          * check "[prefix]format = xxx"
3320          * SND_SOC_DAIFMT_FORMAT_MASK area
3321          */
3322         snprintf(prop, sizeof(prop), "%sformat", prefix);
3323         ret = of_property_read_string(np, prop, &str);
3324         if (ret == 0) {
3325                 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3326                         if (strcmp(str, of_fmt_table[i].name) == 0) {
3327                                 format |= of_fmt_table[i].val;
3328                                 break;
3329                         }
3330                 }
3331         }
3332
3333         /*
3334          * check "[prefix]continuous-clock"
3335          * SND_SOC_DAIFMT_CLOCK_MASK area
3336          */
3337         snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3338         if (of_get_property(np, prop, NULL))
3339                 format |= SND_SOC_DAIFMT_CONT;
3340         else
3341                 format |= SND_SOC_DAIFMT_GATED;
3342
3343         /*
3344          * check "[prefix]bitclock-inversion"
3345          * check "[prefix]frame-inversion"
3346          * SND_SOC_DAIFMT_INV_MASK area
3347          */
3348         snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3349         bit = !!of_get_property(np, prop, NULL);
3350
3351         snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3352         frame = !!of_get_property(np, prop, NULL);
3353
3354         switch ((bit << 4) + frame) {
3355         case 0x11:
3356                 format |= SND_SOC_DAIFMT_IB_IF;
3357                 break;
3358         case 0x10:
3359                 format |= SND_SOC_DAIFMT_IB_NF;
3360                 break;
3361         case 0x01:
3362                 format |= SND_SOC_DAIFMT_NB_IF;
3363                 break;
3364         default:
3365                 /* SND_SOC_DAIFMT_NB_NF is default */
3366                 break;
3367         }
3368
3369         /*
3370          * check "[prefix]bitclock-master"
3371          * check "[prefix]frame-master"
3372          * SND_SOC_DAIFMT_MASTER_MASK area
3373          */
3374         snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3375         bit = !!of_get_property(np, prop, NULL);
3376         if (bit && bitclkmaster)
3377                 *bitclkmaster = of_parse_phandle(np, prop, 0);
3378
3379         snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3380         frame = !!of_get_property(np, prop, NULL);
3381         if (frame && framemaster)
3382                 *framemaster = of_parse_phandle(np, prop, 0);
3383
3384         switch ((bit << 4) + frame) {
3385         case 0x11:
3386                 format |= SND_SOC_DAIFMT_CBM_CFM;
3387                 break;
3388         case 0x10:
3389                 format |= SND_SOC_DAIFMT_CBM_CFS;
3390                 break;
3391         case 0x01:
3392                 format |= SND_SOC_DAIFMT_CBS_CFM;
3393                 break;
3394         default:
3395                 format |= SND_SOC_DAIFMT_CBS_CFS;
3396                 break;
3397         }
3398
3399         return format;
3400 }
3401 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3402
3403 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3404                                 const char **dai_name)
3405 {
3406         struct snd_soc_component *pos;
3407         int ret = -EPROBE_DEFER;
3408
3409         mutex_lock(&client_mutex);
3410         list_for_each_entry(pos, &component_list, list) {
3411                 if (pos->dev->of_node != args->np)
3412                         continue;
3413
3414                 if (pos->driver->of_xlate_dai_name) {
3415                         ret = pos->driver->of_xlate_dai_name(pos,
3416                                                              args,
3417                                                              dai_name);
3418                 } else {
3419                         int id = -1;
3420
3421                         switch (args->args_count) {
3422                         case 0:
3423                                 id = 0; /* same as dai_drv[0] */
3424                                 break;
3425                         case 1:
3426                                 id = args->args[0];
3427                                 break;
3428                         default:
3429                                 /* not supported */
3430                                 break;
3431                         }
3432
3433                         if (id < 0 || id >= pos->num_dai) {
3434                                 ret = -EINVAL;
3435                                 continue;
3436                         }
3437
3438                         ret = 0;
3439
3440                         *dai_name = pos->dai_drv[id].name;
3441                         if (!*dai_name)
3442                                 *dai_name = pos->name;
3443                 }
3444
3445                 break;
3446         }
3447         mutex_unlock(&client_mutex);
3448         return ret;
3449 }
3450
3451 int snd_soc_of_get_dai_name(struct device_node *of_node,
3452                             const char **dai_name)
3453 {
3454         struct of_phandle_args args;
3455         int ret;
3456
3457         ret = of_parse_phandle_with_args(of_node, "sound-dai",
3458                                          "#sound-dai-cells", 0, &args);
3459         if (ret)
3460                 return ret;
3461
3462         ret = snd_soc_get_dai_name(&args, dai_name);
3463
3464         of_node_put(args.np);
3465
3466         return ret;
3467 }
3468 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3469
3470 /*
3471  * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3472  * @dev: Card device
3473  * @of_node: Device node
3474  * @dai_link: DAI link
3475  *
3476  * Builds an array of CODEC DAI components from the DAI link property
3477  * 'sound-dai'.
3478  * The array is set in the DAI link and the number of DAIs is set accordingly.
3479  * The device nodes in the array (of_node) must be dereferenced by the caller.
3480  *
3481  * Returns 0 for success
3482  */
3483 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3484                                    struct device_node *of_node,
3485                                    struct snd_soc_dai_link *dai_link)
3486 {
3487         struct of_phandle_args args;
3488         struct snd_soc_dai_link_component *component;
3489         char *name;
3490         int index, num_codecs, ret;
3491
3492         /* Count the number of CODECs */
3493         name = "sound-dai";
3494         num_codecs = of_count_phandle_with_args(of_node, name,
3495                                                 "#sound-dai-cells");
3496         if (num_codecs <= 0) {
3497                 if (num_codecs == -ENOENT)
3498                         dev_err(dev, "No 'sound-dai' property\n");
3499                 else
3500                         dev_err(dev, "Bad phandle in 'sound-dai'\n");
3501                 return num_codecs;
3502         }
3503         component = devm_kzalloc(dev,
3504                                  sizeof *component * num_codecs,
3505                                  GFP_KERNEL);
3506         if (!component)
3507                 return -ENOMEM;
3508         dai_link->codecs = component;
3509         dai_link->num_codecs = num_codecs;
3510
3511         /* Parse the list */
3512         for (index = 0, component = dai_link->codecs;
3513              index < dai_link->num_codecs;
3514              index++, component++) {
3515                 ret = of_parse_phandle_with_args(of_node, name,
3516                                                  "#sound-dai-cells",
3517                                                   index, &args);
3518                 if (ret)
3519                         goto err;
3520                 component->of_node = args.np;
3521                 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3522                 if (ret < 0)
3523                         goto err;
3524         }
3525         return 0;
3526 err:
3527         for (index = 0, component = dai_link->codecs;
3528              index < dai_link->num_codecs;
3529              index++, component++) {
3530                 if (!component->of_node)
3531                         break;
3532                 of_node_put(component->of_node);
3533                 component->of_node = NULL;
3534         }
3535         dai_link->codecs = NULL;
3536         dai_link->num_codecs = 0;
3537         return ret;
3538 }
3539 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3540
3541 static int __init snd_soc_init(void)
3542 {
3543 #ifdef CONFIG_DEBUG_FS
3544         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3545         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3546                 pr_warn("ASoC: Failed to create debugfs directory\n");
3547                 snd_soc_debugfs_root = NULL;
3548         }
3549
3550         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3551                                  &codec_list_fops))
3552                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3553
3554         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3555                                  &dai_list_fops))
3556                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3557
3558         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3559                                  &platform_list_fops))
3560                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3561 #endif
3562
3563         snd_soc_util_init();
3564
3565         return platform_driver_register(&soc_driver);
3566 }
3567 module_init(snd_soc_init);
3568
3569 static void __exit snd_soc_exit(void)
3570 {
3571         snd_soc_util_exit();
3572
3573 #ifdef CONFIG_DEBUG_FS
3574         debugfs_remove_recursive(snd_soc_debugfs_root);
3575 #endif
3576         platform_driver_unregister(&soc_driver);
3577 }
3578 module_exit(snd_soc_exit);
3579
3580 /* Module information */
3581 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3582 MODULE_DESCRIPTION("ALSA SoC Core");
3583 MODULE_LICENSE("GPL");
3584 MODULE_ALIAS("platform:soc-audio");