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 static struct attribute *soc_dev_attrs[] = {
 195         &dev_attr_codec_reg.attr,
 196         &dev_attr_pmdown_time.attr,
 197         NULL
 198 };
 199
 200 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
 201                                        struct attribute *attr, int idx)
 202 {
 203         struct device *dev = kobj_to_dev(kobj);
 204         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 205
 206         if (attr == &dev_attr_pmdown_time.attr)
 207                 return attr->mode; /* always visible */
 208         return rtd->codec ? attr->mode : 0; /* enabled only with codec */
 209 }
 210
 211 static const struct attribute_group soc_dapm_dev_group = {
 212         .attrs = soc_dapm_dev_attrs,
 213         .is_visible = soc_dev_attr_is_visible,
 214 };
 215
 216 static const struct attribute_group soc_dev_roup = {
 217         .attrs = soc_dev_attrs,
 218         .is_visible = soc_dev_attr_is_visible,
 219 };
 220
 221 static const struct attribute_group *soc_dev_attr_groups[] = {
 222         &soc_dapm_dev_group,
 223         &soc_dev_roup,
 224         NULL
 225 };
 226
 227 #ifdef CONFIG_DEBUG_FS
 228 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 229                                    size_t count, loff_t *ppos)
 230 {
 231         ssize_t ret;
 232         struct snd_soc_codec *codec = file->private_data;
 233         char *buf;
 234
 235         if (*ppos < 0 || !count)
 236                 return -EINVAL;
 237
 238         buf = kmalloc(count, GFP_KERNEL);
 239         if (!buf)
 240                 return -ENOMEM;
 241
 242         ret = soc_codec_reg_show(codec, buf, count, *ppos);
 243         if (ret >= 0) {
 244                 if (copy_to_user(user_buf, buf, ret)) {
 245                         kfree(buf);
 246                         return -EFAULT;
 247                 }
 248                 *ppos += ret;
 249         }
 250
 251         kfree(buf);
 252         return ret;
 253 }
 254
 255 static ssize_t codec_reg_write_file(struct file *file,
 256                 const char __user *user_buf, size_t count, loff_t *ppos)
 257 {
 258         char buf[32];
 259         size_t buf_size;
 260         char *start = buf;
 261         unsigned long reg, value;
 262         struct snd_soc_codec *codec = file->private_data;
 263         int ret;
 264
 265         buf_size = min(count, (sizeof(buf)-1));
 266         if (copy_from_user(buf, user_buf, buf_size))
 267                 return -EFAULT;
 268         buf[buf_size] = 0;
 269
 270         while (*start == ' ')
 271                 start++;
 272         reg = simple_strtoul(start, &start, 16);
 273         while (*start == ' ')
 274                 start++;
 275         ret = kstrtoul(start, 16, &value);
 276         if (ret)
 277                 return ret;
 278
 279         /* Userspace has been fiddling around behind the kernel's back */
 280         add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
 281
 282         snd_soc_write(codec, reg, value);
 283         return buf_size;
 284 }
 285
 286 static const struct file_operations codec_reg_fops = {
 287         .open = simple_open,
 288         .read = codec_reg_read_file,
 289         .write = codec_reg_write_file,
 290         .llseek = default_llseek,
 291 };
 292
 293 static void soc_init_component_debugfs(struct snd_soc_component *component)
 294 {
 295         if (component->debugfs_prefix) {
 296                 char *name;
 297
 298                 name = kasprintf(GFP_KERNEL, "%s:%s",
 299                         component->debugfs_prefix, component->name);
 300                 if (name) {
 301                         component->debugfs_root = debugfs_create_dir(name,
 302                                 component->card->debugfs_card_root);
 303                         kfree(name);
 304                 }
 305         } else {
 306                 component->debugfs_root = debugfs_create_dir(component->name,
 307                                 component->card->debugfs_card_root);
 308         }
 309
 310         if (!component->debugfs_root) {
 311                 dev_warn(component->dev,
 312                         "ASoC: Failed to create component debugfs directory\n");
 313                 return;
 314         }
 315
 316         snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
 317                 component->debugfs_root);
 318
 319         if (component->init_debugfs)
 320                 component->init_debugfs(component);
 321 }
 322
 323 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
 324 {
 325         debugfs_remove_recursive(component->debugfs_root);
 326 }
 327
 328 static void soc_init_codec_debugfs(struct snd_soc_component *component)
 329 {
 330         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
 331
 332         codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 333                                                  codec->component.debugfs_root,
 334                                                  codec, &codec_reg_fops);
 335         if (!codec->debugfs_reg)
 336                 dev_warn(codec->dev,
 337                         "ASoC: Failed to create codec register debugfs file\n");
 338 }
 339
 340 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 341                                     size_t count, loff_t *ppos)
 342 {
 343         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 344         ssize_t len, ret = 0;
 345         struct snd_soc_codec *codec;
 346
 347         if (!buf)
 348                 return -ENOMEM;
 349
 350         list_for_each_entry(codec, &codec_list, list) {
 351                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 352                                codec->component.name);
 353                 if (len >= 0)
 354                         ret += len;
 355                 if (ret > PAGE_SIZE) {
 356                         ret = PAGE_SIZE;
 357                         break;
 358                 }
 359         }
 360
 361         if (ret >= 0)
 362                 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 363
 364         kfree(buf);
 365
 366         return ret;
 367 }
 368
 369 static const struct file_operations codec_list_fops = {
 370         .read = codec_list_read_file,
 371         .llseek = default_llseek,/* read accesses f_pos */
 372 };
 373
 374 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 375                                   size_t count, loff_t *ppos)
 376 {
 377         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 378         ssize_t len, ret = 0;
 379         struct snd_soc_component *component;
 380         struct snd_soc_dai *dai;
 381
 382         if (!buf)
 383                 return -ENOMEM;
 384
 385         list_for_each_entry(component, &component_list, list) {
 386                 list_for_each_entry(dai, &component->dai_list, list) {
 387                         len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 388                                 dai->name);
 389                         if (len >= 0)
 390                                 ret += len;
 391                         if (ret > PAGE_SIZE) {
 392                                 ret = PAGE_SIZE;
 393                                 break;
 394                         }
 395                 }
 396         }
 397
 398         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 399
 400         kfree(buf);
 401
 402         return ret;
 403 }
 404
 405 static const struct file_operations dai_list_fops = {
 406         .read = dai_list_read_file,
 407         .llseek = default_llseek,/* read accesses f_pos */
 408 };
 409
 410 static ssize_t platform_list_read_file(struct file *file,
 411                                        char __user *user_buf,
 412                                        size_t count, loff_t *ppos)
 413 {
 414         char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 415         ssize_t len, ret = 0;
 416         struct snd_soc_platform *platform;
 417
 418         if (!buf)
 419                 return -ENOMEM;
 420
 421         list_for_each_entry(platform, &platform_list, list) {
 422                 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 423                                platform->component.name);
 424                 if (len >= 0)
 425                         ret += len;
 426                 if (ret > PAGE_SIZE) {
 427                         ret = PAGE_SIZE;
 428                         break;
 429                 }
 430         }
 431
 432         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 433
 434         kfree(buf);
 435
 436         return ret;
 437 }
 438
 439 static const struct file_operations platform_list_fops = {
 440         .read = platform_list_read_file,
 441         .llseek = default_llseek,/* read accesses f_pos */
 442 };
 443
 444 static void soc_init_card_debugfs(struct snd_soc_card *card)
 445 {
 446         card->debugfs_card_root = debugfs_create_dir(card->name,
 447                                                      snd_soc_debugfs_root);
 448         if (!card->debugfs_card_root) {
 449                 dev_warn(card->dev,
 450                          "ASoC: Failed to create card debugfs directory\n");
 451                 return;
 452         }
 453
 454         card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 455                                                     card->debugfs_card_root,
 456                                                     &card->pop_time);
 457         if (!card->debugfs_pop_time)
 458                 dev_warn(card->dev,
 459                        "ASoC: Failed to create pop time debugfs file\n");
 460 }
 461
 462 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 463 {
 464         debugfs_remove_recursive(card->debugfs_card_root);
 465 }
 466
 467 #else
 468
 469 #define soc_init_codec_debugfs NULL
 470
 471 static inline void soc_init_component_debugfs(
 472         struct snd_soc_component *component)
 473 {
 474 }
 475
 476 static inline void soc_cleanup_component_debugfs(
 477         struct snd_soc_component *component)
 478 {
 479 }
 480
 481 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 482 {
 483 }
 484
 485 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 486 {
 487 }
 488 #endif
 489
 490 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
 491                 const char *dai_link, int stream)
 492 {
 493         int i;
 494
 495         for (i = 0; i < card->num_links; i++) {
 496                 if (card->rtd[i].dai_link->no_pcm &&
 497                         !strcmp(card->rtd[i].dai_link->name, dai_link))
 498                         return card->rtd[i].pcm->streams[stream].substream;
 499         }
 500         dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
 501         return NULL;
 502 }
 503 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
 504
 505 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
 506                 const char *dai_link)
 507 {
 508         int i;
 509
 510         for (i = 0; i < card->num_links; i++) {
 511                 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
 512                         return &card->rtd[i];
 513         }
 514         dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
 515         return NULL;
 516 }
 517 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
 518
 519 static void codec2codec_close_delayed_work(struct work_struct *work)
 520 {
 521         /* Currently nothing to do for c2c links
 522          * Since c2c links are internal nodes in the DAPM graph and
 523          * don't interface with the outside world or application layer
 524          * we don't have to do any special handling on close.
 525          */
 526 }
 527
 528 #ifdef CONFIG_PM_SLEEP
 529 /* powers down audio subsystem for suspend */
 530 int snd_soc_suspend(struct device *dev)
 531 {
 532         struct snd_soc_card *card = dev_get_drvdata(dev);
 533         struct snd_soc_codec *codec;
 534         int i, j;
 535
 536         /* If the card is not initialized yet there is nothing to do */
 537         if (!card->instantiated)
 538                 return 0;
 539
 540         /* Due to the resume being scheduled into a workqueue we could
 541         * suspend before that's finished - wait for it to complete.
 542          */
 543         snd_power_lock(card->snd_card);
 544         snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
 545         snd_power_unlock(card->snd_card);
 546
 547         /* we're going to block userspace touching us until resume completes */
 548         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
 549
 550         /* mute any active DACs */
 551         for (i = 0; i < card->num_rtd; i++) {
 552
 553                 if (card->rtd[i].dai_link->ignore_suspend)
 554                         continue;
 555
 556                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
 557                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
 558                         struct snd_soc_dai_driver *drv = dai->driver;
 559
 560                         if (drv->ops->digital_mute && dai->playback_active)
 561                                 drv->ops->digital_mute(dai, 1);
 562                 }
 563         }
 564
 565         /* suspend all pcms */
 566         for (i = 0; i < card->num_rtd; i++) {
 567                 if (card->rtd[i].dai_link->ignore_suspend)
 568                         continue;
 569
 570                 snd_pcm_suspend_all(card->rtd[i].pcm);
 571         }
 572
 573         if (card->suspend_pre)
 574                 card->suspend_pre(card);
 575
 576         for (i = 0; i < card->num_rtd; i++) {
 577                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 578
 579                 if (card->rtd[i].dai_link->ignore_suspend)
 580                         continue;
 581
 582                 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
 583                         cpu_dai->driver->suspend(cpu_dai);
 584         }
 585
 586         /* close any waiting streams and save state */
 587         for (i = 0; i < card->num_rtd; i++) {
 588                 struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais;
 589                 flush_delayed_work(&card->rtd[i].delayed_work);
 590                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
 591                         codec_dais[j]->codec->dapm.suspend_bias_level =
 592                                         codec_dais[j]->codec->dapm.bias_level;
 593                 }
 594         }
 595
 596         for (i = 0; i < card->num_rtd; i++) {
 597
 598                 if (card->rtd[i].dai_link->ignore_suspend)
 599                         continue;
 600
 601                 snd_soc_dapm_stream_event(&card->rtd[i],
 602                                           SNDRV_PCM_STREAM_PLAYBACK,
 603                                           SND_SOC_DAPM_STREAM_SUSPEND);
 604
 605                 snd_soc_dapm_stream_event(&card->rtd[i],
 606                                           SNDRV_PCM_STREAM_CAPTURE,
 607                                           SND_SOC_DAPM_STREAM_SUSPEND);
 608         }
 609
 610         /* Recheck all endpoints too, their state is affected by suspend */
 611         dapm_mark_endpoints_dirty(card);
 612         snd_soc_dapm_sync(&card->dapm);
 613
 614         /* suspend all CODECs */
 615         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 616                 /* If there are paths active then the CODEC will be held with
 617                  * bias _ON and should not be suspended. */
 618                 if (!codec->suspended) {
 619                         switch (codec->dapm.bias_level) {
 620                         case SND_SOC_BIAS_STANDBY:
 621                                 /*
 622                                  * If the CODEC is capable of idle
 623                                  * bias off then being in STANDBY
 624                                  * means it's doing something,
 625                                  * otherwise fall through.
 626                                  */
 627                                 if (codec->dapm.idle_bias_off) {
 628                                         dev_dbg(codec->dev,
 629                                                 "ASoC: idle_bias_off CODEC on over suspend\n");
 630                                         break;
 631                                 }
 632
 633                         case SND_SOC_BIAS_OFF:
 634                                 if (codec->driver->suspend)
 635                                         codec->driver->suspend(codec);
 636                                 codec->suspended = 1;
 637                                 if (codec->component.regmap)
 638                                         regcache_mark_dirty(codec->component.regmap);
 639                                 /* deactivate pins to sleep state */
 640                                 pinctrl_pm_select_sleep_state(codec->dev);
 641                                 break;
 642                         default:
 643                                 dev_dbg(codec->dev,
 644                                         "ASoC: CODEC is on over suspend\n");
 645                                 break;
 646                         }
 647                 }
 648         }
 649
 650         for (i = 0; i < card->num_rtd; i++) {
 651                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 652
 653                 if (card->rtd[i].dai_link->ignore_suspend)
 654                         continue;
 655
 656                 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
 657                         cpu_dai->driver->suspend(cpu_dai);
 658
 659                 /* deactivate pins to sleep state */
 660                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 661         }
 662
 663         if (card->suspend_post)
 664                 card->suspend_post(card);
 665
 666         return 0;
 667 }
 668 EXPORT_SYMBOL_GPL(snd_soc_suspend);
 669
 670 /* deferred resume work, so resume can complete before we finished
 671  * setting our codec back up, which can be very slow on I2C
 672  */
 673 static void soc_resume_deferred(struct work_struct *work)
 674 {
 675         struct snd_soc_card *card =
 676                         container_of(work, struct snd_soc_card, deferred_resume_work);
 677         struct snd_soc_codec *codec;
 678         int i, j;
 679
 680         /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
 681          * so userspace apps are blocked from touching us
 682          */
 683
 684         dev_dbg(card->dev, "ASoC: starting resume work\n");
 685
 686         /* Bring us up into D2 so that DAPM starts enabling things */
 687         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
 688
 689         if (card->resume_pre)
 690                 card->resume_pre(card);
 691
 692         /* resume control bus DAIs */
 693         for (i = 0; i < card->num_rtd; i++) {
 694                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 695
 696                 if (card->rtd[i].dai_link->ignore_suspend)
 697                         continue;
 698
 699                 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
 700                         cpu_dai->driver->resume(cpu_dai);
 701         }
 702
 703         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 704                 /* If the CODEC was idle over suspend then it will have been
 705                  * left with bias OFF or STANDBY and suspended so we must now
 706                  * resume.  Otherwise the suspend was suppressed.
 707                  */
 708                 if (codec->suspended) {
 709                         switch (codec->dapm.bias_level) {
 710                         case SND_SOC_BIAS_STANDBY:
 711                         case SND_SOC_BIAS_OFF:
 712                                 if (codec->driver->resume)
 713                                         codec->driver->resume(codec);
 714                                 codec->suspended = 0;
 715                                 break;
 716                         default:
 717                                 dev_dbg(codec->dev,
 718                                         "ASoC: CODEC was on over suspend\n");
 719                                 break;
 720                         }
 721                 }
 722         }
 723
 724         for (i = 0; i < card->num_rtd; i++) {
 725
 726                 if (card->rtd[i].dai_link->ignore_suspend)
 727                         continue;
 728
 729                 snd_soc_dapm_stream_event(&card->rtd[i],
 730                                           SNDRV_PCM_STREAM_PLAYBACK,
 731                                           SND_SOC_DAPM_STREAM_RESUME);
 732
 733                 snd_soc_dapm_stream_event(&card->rtd[i],
 734                                           SNDRV_PCM_STREAM_CAPTURE,
 735                                           SND_SOC_DAPM_STREAM_RESUME);
 736         }
 737
 738         /* unmute any active DACs */
 739         for (i = 0; i < card->num_rtd; i++) {
 740
 741                 if (card->rtd[i].dai_link->ignore_suspend)
 742                         continue;
 743
 744                 for (j = 0; j < card->rtd[i].num_codecs; j++) {
 745                         struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
 746                         struct snd_soc_dai_driver *drv = dai->driver;
 747
 748                         if (drv->ops->digital_mute && dai->playback_active)
 749                                 drv->ops->digital_mute(dai, 0);
 750                 }
 751         }
 752
 753         for (i = 0; i < card->num_rtd; i++) {
 754                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 755
 756                 if (card->rtd[i].dai_link->ignore_suspend)
 757                         continue;
 758
 759                 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
 760                         cpu_dai->driver->resume(cpu_dai);
 761         }
 762
 763         if (card->resume_post)
 764                 card->resume_post(card);
 765
 766         dev_dbg(card->dev, "ASoC: resume work completed\n");
 767
 768         /* userspace can access us now we are back as we were before */
 769         snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
 770
 771         /* Recheck all endpoints too, their state is affected by suspend */
 772         dapm_mark_endpoints_dirty(card);
 773         snd_soc_dapm_sync(&card->dapm);
 774 }
 775
 776 /* powers up audio subsystem after a suspend */
 777 int snd_soc_resume(struct device *dev)
 778 {
 779         struct snd_soc_card *card = dev_get_drvdata(dev);
 780         bool bus_control = false;
 781         int i;
 782
 783         /* If the card is not initialized yet there is nothing to do */
 784         if (!card->instantiated)
 785                 return 0;
 786
 787         /* activate pins from sleep state */
 788         for (i = 0; i < card->num_rtd; i++) {
 789                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
 790                 struct snd_soc_dai **codec_dais = rtd->codec_dais;
 791                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 792                 int j;
 793
 794                 if (cpu_dai->active)
 795                         pinctrl_pm_select_default_state(cpu_dai->dev);
 796
 797                 for (j = 0; j < rtd->num_codecs; j++) {
 798                         struct snd_soc_dai *codec_dai = codec_dais[j];
 799                         if (codec_dai->active)
 800                                 pinctrl_pm_select_default_state(codec_dai->dev);
 801                 }
 802         }
 803
 804         /*
 805          * DAIs that also act as the control bus master might have other drivers
 806          * hanging off them so need to resume immediately. Other drivers don't
 807          * have that problem and may take a substantial amount of time to resume
 808          * due to I/O costs and anti-pop so handle them out of line.
 809          */
 810         for (i = 0; i < card->num_rtd; i++) {
 811                 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 812                 bus_control |= cpu_dai->driver->bus_control;
 813         }
 814         if (bus_control) {
 815                 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
 816                 soc_resume_deferred(&card->deferred_resume_work);
 817         } else {
 818                 dev_dbg(dev, "ASoC: Scheduling resume work\n");
 819                 if (!schedule_work(&card->deferred_resume_work))
 820                         dev_err(dev, "ASoC: resume work item may be lost\n");
 821         }
 822
 823         return 0;
 824 }
 825 EXPORT_SYMBOL_GPL(snd_soc_resume);
 826 #else
 827 #define snd_soc_suspend NULL
 828 #define snd_soc_resume NULL
 829 #endif
 830
 831 static const struct snd_soc_dai_ops null_dai_ops = {
 832 };
 833
 834 static struct snd_soc_component *soc_find_component(
 835         const struct device_node *of_node, const char *name)
 836 {
 837         struct snd_soc_component *component;
 838
 839         list_for_each_entry(component, &component_list, list) {
 840                 if (of_node) {
 841                         if (component->dev->of_node == of_node)
 842                                 return component;
 843                 } else if (strcmp(component->name, name) == 0) {
 844                         return component;
 845                 }
 846         }
 847
 848         return NULL;
 849 }
 850
 851 static struct snd_soc_dai *snd_soc_find_dai(
 852         const struct snd_soc_dai_link_component *dlc)
 853 {
 854         struct snd_soc_component *component;
 855         struct snd_soc_dai *dai;
 856
 857         /* Find CPU DAI from registered DAIs*/
 858         list_for_each_entry(component, &component_list, list) {
 859                 if (dlc->of_node && component->dev->of_node != dlc->of_node)
 860                         continue;
 861                 if (dlc->name && strcmp(component->name, dlc->name))
 862                         continue;
 863                 list_for_each_entry(dai, &component->dai_list, list) {
 864                         if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
 865                                 continue;
 866
 867                         return dai;
 868                 }
 869         }
 870
 871         return NULL;
 872 }
 873
 874 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
 875 {
 876         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
 877         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 878         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
 879         struct snd_soc_dai_link_component cpu_dai_component;
 880         struct snd_soc_dai **codec_dais = rtd->codec_dais;
 881         struct snd_soc_platform *platform;
 882         const char *platform_name;
 883         int i;
 884
 885         dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
 886
 887         cpu_dai_component.name = dai_link->cpu_name;
 888         cpu_dai_component.of_node = dai_link->cpu_of_node;
 889         cpu_dai_component.dai_name = dai_link->cpu_dai_name;
 890         rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
 891         if (!rtd->cpu_dai) {
 892                 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
 893                         dai_link->cpu_dai_name);
 894                 return -EPROBE_DEFER;
 895         }
 896
 897         rtd->num_codecs = dai_link->num_codecs;
 898
 899         /* Find CODEC from registered CODECs */
 900         for (i = 0; i < rtd->num_codecs; i++) {
 901                 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
 902                 if (!codec_dais[i]) {
 903                         dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
 904                                 codecs[i].dai_name);
 905                         return -EPROBE_DEFER;
 906                 }
 907         }
 908
 909         /* Single codec links expect codec and codec_dai in runtime data */
 910         rtd->codec_dai = codec_dais[0];
 911         rtd->codec = rtd->codec_dai->codec;
 912
 913         /* if there's no platform we match on the empty platform */
 914         platform_name = dai_link->platform_name;
 915         if (!platform_name && !dai_link->platform_of_node)
 916                 platform_name = "snd-soc-dummy";
 917
 918         /* find one from the set of registered platforms */
 919         list_for_each_entry(platform, &platform_list, list) {
 920                 if (dai_link->platform_of_node) {
 921                         if (platform->dev->of_node !=
 922                             dai_link->platform_of_node)
 923                                 continue;
 924                 } else {
 925                         if (strcmp(platform->component.name, platform_name))
 926                                 continue;
 927                 }
 928
 929                 rtd->platform = platform;
 930         }
 931         if (!rtd->platform) {
 932                 dev_err(card->dev, "ASoC: platform %s not registered\n",
 933                         dai_link->platform_name);
 934                 return -EPROBE_DEFER;
 935         }
 936
 937         card->num_rtd++;
 938
 939         return 0;
 940 }
 941
 942 static void soc_remove_component(struct snd_soc_component *component)
 943 {
 944         if (!component->probed)
 945                 return;
 946
 947         /* This is a HACK and will be removed soon */
 948         if (component->codec)
 949                 list_del(&component->codec->card_list);
 950
 951         if (component->remove)
 952                 component->remove(component);
 953
 954         snd_soc_dapm_free(snd_soc_component_get_dapm(component));
 955
 956         soc_cleanup_component_debugfs(component);
 957         component->probed = 0;
 958         module_put(component->dev->driver->owner);
 959 }
 960
 961 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
 962 {
 963         int err;
 964
 965         if (dai && dai->probed &&
 966                         dai->driver->remove_order == order) {
 967                 if (dai->driver->remove) {
 968                         err = dai->driver->remove(dai);
 969                         if (err < 0)
 970                                 dev_err(dai->dev,
 971                                         "ASoC: failed to remove %s: %d\n",
 972                                         dai->name, err);
 973                 }
 974                 dai->probed = 0;
 975         }
 976 }
 977
 978 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
 979 {
 980         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 981         int i;
 982
 983         /* unregister the rtd device */
 984         if (rtd->dev_registered) {
 985                 device_unregister(rtd->dev);
 986                 rtd->dev_registered = 0;
 987         }
 988
 989         /* remove the CODEC DAI */
 990         for (i = 0; i < rtd->num_codecs; i++)
 991                 soc_remove_dai(rtd->codec_dais[i], order);
 992
 993         soc_remove_dai(rtd->cpu_dai, order);
 994 }
 995
 996 static void soc_remove_link_components(struct snd_soc_card *card, int num,
 997                                        int order)
 998 {
 999         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1000         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001         struct snd_soc_platform *platform = rtd->platform;
1002         struct snd_soc_component *component;
1003         int i;
1004
1005         /* remove the platform */
1006         if (platform && platform->component.driver->remove_order == order)
1007                 soc_remove_component(&platform->component);
1008
1009         /* remove the CODEC-side CODEC */
1010         for (i = 0; i < rtd->num_codecs; i++) {
1011                 component = rtd->codec_dais[i]->component;
1012                 if (component->driver->remove_order == order)
1013                         soc_remove_component(component);
1014         }
1015
1016         /* remove any CPU-side CODEC */
1017         if (cpu_dai) {
1018                 if (cpu_dai->component->driver->remove_order == order)
1019                         soc_remove_component(cpu_dai->component);
1020         }
1021 }
1022
1023 static void soc_remove_dai_links(struct snd_soc_card *card)
1024 {
1025         int dai, order;
1026
1027         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1028                         order++) {
1029                 for (dai = 0; dai < card->num_rtd; dai++)
1030                         soc_remove_link_dais(card, dai, order);
1031         }
1032
1033         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1034                         order++) {
1035                 for (dai = 0; dai < card->num_rtd; dai++)
1036                         soc_remove_link_components(card, dai, order);
1037         }
1038
1039         card->num_rtd = 0;
1040 }
1041
1042 static void soc_set_name_prefix(struct snd_soc_card *card,
1043                                 struct snd_soc_component *component)
1044 {
1045         int i;
1046
1047         if (card->codec_conf == NULL)
1048                 return;
1049
1050         for (i = 0; i < card->num_configs; i++) {
1051                 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1052                 if (map->of_node && component->dev->of_node != map->of_node)
1053                         continue;
1054                 if (map->dev_name && strcmp(component->name, map->dev_name))
1055                         continue;
1056                 component->name_prefix = map->name_prefix;
1057                 break;
1058         }
1059 }
1060
1061 static int soc_probe_component(struct snd_soc_card *card,
1062         struct snd_soc_component *component)
1063 {
1064         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1065         struct snd_soc_dai *dai;
1066         int ret;
1067
1068         if (component->probed)
1069                 return 0;
1070
1071         component->card = card;
1072         dapm->card = card;
1073         soc_set_name_prefix(card, component);
1074
1075         if (!try_module_get(component->dev->driver->owner))
1076                 return -ENODEV;
1077
1078         soc_init_component_debugfs(component);
1079
1080         if (component->dapm_widgets) {
1081                 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1082                         component->num_dapm_widgets);
1083
1084                 if (ret != 0) {
1085                         dev_err(component->dev,
1086                                 "Failed to create new controls %d\n", ret);
1087                         goto err_probe;
1088                 }
1089         }
1090
1091         list_for_each_entry(dai, &component->dai_list, list) {
1092                 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1093                 if (ret != 0) {
1094                         dev_err(component->dev,
1095                                 "Failed to create DAI widgets %d\n", ret);
1096                         goto err_probe;
1097                 }
1098         }
1099
1100         if (component->probe) {
1101                 ret = component->probe(component);
1102                 if (ret < 0) {
1103                         dev_err(component->dev,
1104                                 "ASoC: failed to probe component %d\n", ret);
1105                         goto err_probe;
1106                 }
1107
1108                 WARN(dapm->idle_bias_off &&
1109                         dapm->bias_level != SND_SOC_BIAS_OFF,
1110                         "codec %s can not start from non-off bias with idle_bias_off==1\n",
1111                         component->name);
1112         }
1113
1114         if (component->controls)
1115                 snd_soc_add_component_controls(component, component->controls,
1116                                      component->num_controls);
1117         if (component->dapm_routes)
1118                 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1119                                         component->num_dapm_routes);
1120
1121         component->probed = 1;
1122         list_add(&dapm->list, &card->dapm_list);
1123
1124         /* This is a HACK and will be removed soon */
1125         if (component->codec)
1126                 list_add(&component->codec->card_list, &card->codec_dev_list);
1127
1128         return 0;
1129
1130 err_probe:
1131         soc_cleanup_component_debugfs(component);
1132         module_put(component->dev->driver->owner);
1133
1134         return ret;
1135 }
1136
1137 static void rtd_release(struct device *dev)
1138 {
1139         kfree(dev);
1140 }
1141
1142 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1143         const char *name)
1144 {
1145         int ret = 0;
1146
1147         /* register the rtd device */
1148         rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1149         if (!rtd->dev)
1150                 return -ENOMEM;
1151         device_initialize(rtd->dev);
1152         rtd->dev->parent = rtd->card->dev;
1153         rtd->dev->release = rtd_release;
1154         rtd->dev->groups = soc_dev_attr_groups;
1155         dev_set_name(rtd->dev, "%s", name);
1156         dev_set_drvdata(rtd->dev, rtd);
1157         mutex_init(&rtd->pcm_mutex);
1158         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1159         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1160         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1161         INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1162         ret = device_add(rtd->dev);
1163         if (ret < 0) {
1164                 /* calling put_device() here to free the rtd->dev */
1165                 put_device(rtd->dev);
1166                 dev_err(rtd->card->dev,
1167                         "ASoC: failed to register runtime device: %d\n", ret);
1168                 return ret;
1169         }
1170         rtd->dev_registered = 1;
1171         return 0;
1172 }
1173
1174 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1175                                      int order)
1176 {
1177         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1178         struct snd_soc_platform *platform = rtd->platform;
1179         struct snd_soc_component *component;
1180         int i, ret;
1181
1182         /* probe the CPU-side component, if it is a CODEC */
1183         component = rtd->cpu_dai->component;
1184         if (component->driver->probe_order == order) {
1185                 ret = soc_probe_component(card, component);
1186                 if (ret < 0)
1187                         return ret;
1188         }
1189
1190         /* probe the CODEC-side components */
1191         for (i = 0; i < rtd->num_codecs; i++) {
1192                 component = rtd->codec_dais[i]->component;
1193                 if (component->driver->probe_order == order) {
1194                         ret = soc_probe_component(card, component);
1195                         if (ret < 0)
1196                                 return ret;
1197                 }
1198         }
1199
1200         /* probe the platform */
1201         if (platform->component.driver->probe_order == order) {
1202                 ret = soc_probe_component(card, &platform->component);
1203                 if (ret < 0)
1204                         return ret;
1205         }
1206
1207         return 0;
1208 }
1209
1210 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1211 {
1212         int ret;
1213
1214         if (!dai->probed && dai->driver->probe_order == order) {
1215                 if (dai->driver->probe) {
1216                         ret = dai->driver->probe(dai);
1217                         if (ret < 0) {
1218                                 dev_err(dai->dev,
1219                                         "ASoC: failed to probe DAI %s: %d\n",
1220                                         dai->name, ret);
1221                                 return ret;
1222                         }
1223                 }
1224
1225                 dai->probed = 1;
1226         }
1227
1228         return 0;
1229 }
1230
1231 static int soc_link_dai_widgets(struct snd_soc_card *card,
1232                                 struct snd_soc_dai_link *dai_link,
1233                                 struct snd_soc_pcm_runtime *rtd)
1234 {
1235         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1236         struct snd_soc_dai *codec_dai = rtd->codec_dai;
1237         struct snd_soc_dapm_widget *play_w, *capture_w;
1238         int ret;
1239
1240         if (rtd->num_codecs > 1)
1241                 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1242
1243         /* link the DAI widgets */
1244         play_w = codec_dai->playback_widget;
1245         capture_w = cpu_dai->capture_widget;
1246         if (play_w && capture_w) {
1247                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1248                                            capture_w, play_w);
1249                 if (ret != 0) {
1250                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1251                                 play_w->name, capture_w->name, ret);
1252                         return ret;
1253                 }
1254         }
1255
1256         play_w = cpu_dai->playback_widget;
1257         capture_w = codec_dai->capture_widget;
1258         if (play_w && capture_w) {
1259                 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1260                                            capture_w, play_w);
1261                 if (ret != 0) {
1262                         dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1263                                 play_w->name, capture_w->name, ret);
1264                         return ret;
1265                 }
1266         }
1267
1268         return 0;
1269 }
1270
1271 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1272 {
1273         struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1274         struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1275         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1276         int i, ret;
1277
1278         dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1279                         card->name, num, order);
1280
1281         /* set default power off timeout */
1282         rtd->pmdown_time = pmdown_time;
1283
1284         ret = soc_probe_dai(cpu_dai, order);
1285         if (ret)
1286                 return ret;
1287
1288         /* probe the CODEC DAI */
1289         for (i = 0; i < rtd->num_codecs; i++) {
1290                 ret = soc_probe_dai(rtd->codec_dais[i], order);
1291                 if (ret)
1292                         return ret;
1293         }
1294
1295         /* complete DAI probe during last probe */
1296         if (order != SND_SOC_COMP_ORDER_LAST)
1297                 return 0;
1298
1299         /* do machine specific initialization */
1300         if (dai_link->init) {
1301                 ret = dai_link->init(rtd);
1302                 if (ret < 0) {
1303                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1304                                 dai_link->name, ret);
1305                         return ret;
1306                 }
1307         }
1308
1309         ret = soc_post_component_init(rtd, dai_link->name);
1310         if (ret)
1311                 return ret;
1312
1313 #ifdef CONFIG_DEBUG_FS
1314         /* add DPCM sysfs entries */
1315         if (dai_link->dynamic) {
1316                 ret = soc_dpcm_debugfs_add(rtd);
1317                 if (ret < 0) {
1318                         dev_err(rtd->dev,
1319                                 "ASoC: failed to add dpcm sysfs entries: %d\n",
1320                                 ret);
1321                         return ret;
1322                 }
1323         }
1324 #endif
1325
1326         if (cpu_dai->driver->compress_dai) {
1327                 /*create compress_device"*/
1328                 ret = soc_new_compress(rtd, num);
1329                 if (ret < 0) {
1330                         dev_err(card->dev, "ASoC: can't create compress %s\n",
1331                                          dai_link->stream_name);
1332                         return ret;
1333                 }
1334         } else {
1335
1336                 if (!dai_link->params) {
1337                         /* create the pcm */
1338                         ret = soc_new_pcm(rtd, num);
1339                         if (ret < 0) {
1340                                 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1341                                        dai_link->stream_name, ret);
1342                                 return ret;
1343                         }
1344                 } else {
1345                         INIT_DELAYED_WORK(&rtd->delayed_work,
1346                                                 codec2codec_close_delayed_work);
1347
1348                         /* link the DAI widgets */
1349                         ret = soc_link_dai_widgets(card, dai_link, rtd);
1350                         if (ret)
1351                                 return ret;
1352                 }
1353         }
1354
1355         return 0;
1356 }
1357
1358 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1359 {
1360         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1361         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1362         const char *name = aux_dev->codec_name;
1363
1364         rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1365         if (!rtd->component) {
1366                 if (aux_dev->codec_of_node)
1367                         name = of_node_full_name(aux_dev->codec_of_node);
1368
1369                 dev_err(card->dev, "ASoC: %s not registered\n", name);
1370                 return -EPROBE_DEFER;
1371         }
1372
1373         /*
1374          * Some places still reference rtd->codec, so we have to keep that
1375          * initialized if the component is a CODEC. Once all those references
1376          * have been removed, this code can be removed as well.
1377          */
1378          rtd->codec = rtd->component->codec;
1379
1380         return 0;
1381 }
1382
1383 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1384 {
1385         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1386         struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1387         int ret;
1388
1389         ret = soc_probe_component(card, rtd->component);
1390         if (ret < 0)
1391                 return ret;
1392
1393         /* do machine specific initialization */
1394         if (aux_dev->init) {
1395                 ret = aux_dev->init(rtd->component);
1396                 if (ret < 0) {
1397                         dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1398                                 aux_dev->name, ret);
1399                         return ret;
1400                 }
1401         }
1402
1403         return soc_post_component_init(rtd, aux_dev->name);
1404 }
1405
1406 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1407 {
1408         struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1409         struct snd_soc_component *component = rtd->component;
1410
1411         /* unregister the rtd device */
1412         if (rtd->dev_registered) {
1413                 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1414                 device_unregister(rtd->dev);
1415                 rtd->dev_registered = 0;
1416         }
1417
1418         if (component && component->probed)
1419                 soc_remove_component(component);
1420 }
1421
1422 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1423 {
1424         int ret;
1425
1426         if (codec->cache_init)
1427                 return 0;
1428
1429         ret = snd_soc_cache_init(codec);
1430         if (ret < 0) {
1431                 dev_err(codec->dev,
1432                         "ASoC: Failed to set cache compression type: %d\n",
1433                         ret);
1434                 return ret;
1435         }
1436         codec->cache_init = 1;
1437         return 0;
1438 }
1439
1440 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1441 {
1442         struct snd_soc_codec *codec;
1443         struct snd_soc_dai_link *dai_link;
1444         int ret, i, order, dai_fmt;
1445
1446         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1447
1448         /* bind DAIs */
1449         for (i = 0; i < card->num_links; i++) {
1450                 ret = soc_bind_dai_link(card, i);
1451                 if (ret != 0)
1452                         goto base_error;
1453         }
1454
1455         /* bind aux_devs too */
1456         for (i = 0; i < card->num_aux_devs; i++) {
1457                 ret = soc_bind_aux_dev(card, i);
1458                 if (ret != 0)
1459                         goto base_error;
1460         }
1461
1462         /* initialize the register cache for each available codec */
1463         list_for_each_entry(codec, &codec_list, list) {
1464                 if (codec->cache_init)
1465                         continue;
1466                 ret = snd_soc_init_codec_cache(codec);
1467                 if (ret < 0)
1468                         goto base_error;
1469         }
1470
1471         /* card bind complete so register a sound card */
1472         ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1473                         card->owner, 0, &card->snd_card);
1474         if (ret < 0) {
1475                 dev_err(card->dev,
1476                         "ASoC: can't create sound card for card %s: %d\n",
1477                         card->name, ret);
1478                 goto base_error;
1479         }
1480
1481         card->dapm.bias_level = SND_SOC_BIAS_OFF;
1482         card->dapm.dev = card->dev;
1483         card->dapm.card = card;
1484         list_add(&card->dapm.list, &card->dapm_list);
1485
1486 #ifdef CONFIG_DEBUG_FS
1487         snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1488 #endif
1489
1490 #ifdef CONFIG_PM_SLEEP
1491         /* deferred resume work */
1492         INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1493 #endif
1494
1495         if (card->dapm_widgets)
1496                 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1497                                           card->num_dapm_widgets);
1498
1499         /* initialise the sound card only once */
1500         if (card->probe) {
1501                 ret = card->probe(card);
1502                 if (ret < 0)
1503                         goto card_probe_error;
1504         }
1505
1506         /* probe all components used by DAI links on this card */
1507         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1508                         order++) {
1509                 for (i = 0; i < card->num_links; i++) {
1510                         ret = soc_probe_link_components(card, i, order);
1511                         if (ret < 0) {
1512                                 dev_err(card->dev,
1513                                         "ASoC: failed to instantiate card %d\n",
1514                                         ret);
1515                                 goto probe_dai_err;
1516                         }
1517                 }
1518         }
1519
1520         /* probe all DAI links on this card */
1521         for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1522                         order++) {
1523                 for (i = 0; i < card->num_links; i++) {
1524                         ret = soc_probe_link_dais(card, i, order);
1525                         if (ret < 0) {
1526                                 dev_err(card->dev,
1527                                         "ASoC: failed to instantiate card %d\n",
1528                                         ret);
1529                                 goto probe_dai_err;
1530                         }
1531                 }
1532         }
1533
1534         for (i = 0; i < card->num_aux_devs; i++) {
1535                 ret = soc_probe_aux_dev(card, i);
1536                 if (ret < 0) {
1537                         dev_err(card->dev,
1538                                 "ASoC: failed to add auxiliary devices %d\n",
1539                                 ret);
1540                         goto probe_aux_dev_err;
1541                 }
1542         }
1543
1544         snd_soc_dapm_link_dai_widgets(card);
1545         snd_soc_dapm_connect_dai_link_widgets(card);
1546
1547         if (card->controls)
1548                 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1549
1550         if (card->dapm_routes)
1551                 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1552                                         card->num_dapm_routes);
1553
1554         for (i = 0; i < card->num_links; i++) {
1555                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1556                 dai_link = &card->dai_link[i];
1557                 dai_fmt = dai_link->dai_fmt;
1558
1559                 if (dai_fmt) {
1560                         struct snd_soc_dai **codec_dais = rtd->codec_dais;
1561                         int j;
1562
1563                         for (j = 0; j < rtd->num_codecs; j++) {
1564                                 struct snd_soc_dai *codec_dai = codec_dais[j];
1565
1566                                 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1567                                 if (ret != 0 && ret != -ENOTSUPP)
1568                                         dev_warn(codec_dai->dev,
1569                                                  "ASoC: Failed to set DAI format: %d\n",
1570                                                  ret);
1571                         }
1572                 }
1573
1574                 /* If this is a regular CPU link there will be a platform */
1575                 if (dai_fmt &&
1576                     (dai_link->platform_name || dai_link->platform_of_node)) {
1577                         ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1578                                                   dai_fmt);
1579                         if (ret != 0 && ret != -ENOTSUPP)
1580                                 dev_warn(card->rtd[i].cpu_dai->dev,
1581                                          "ASoC: Failed to set DAI format: %d\n",
1582                                          ret);
1583                 } else if (dai_fmt) {
1584                         /* Flip the polarity for the "CPU" end */
1585                         dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1586                         switch (dai_link->dai_fmt &
1587                                 SND_SOC_DAIFMT_MASTER_MASK) {
1588                         case SND_SOC_DAIFMT_CBM_CFM:
1589                                 dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1590                                 break;
1591                         case SND_SOC_DAIFMT_CBM_CFS:
1592                                 dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1593                                 break;
1594                         case SND_SOC_DAIFMT_CBS_CFM:
1595                                 dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1596                                 break;
1597                         case SND_SOC_DAIFMT_CBS_CFS:
1598                                 dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1599                                 break;
1600                         }
1601
1602                         ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1603                                                   dai_fmt);
1604                         if (ret != 0 && ret != -ENOTSUPP)
1605                                 dev_warn(card->rtd[i].cpu_dai->dev,
1606                                          "ASoC: Failed to set DAI format: %d\n",
1607                                          ret);
1608                 }
1609         }
1610
1611         snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1612                  "%s", card->name);
1613         snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1614                  "%s", card->long_name ? card->long_name : card->name);
1615         snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1616                  "%s", card->driver_name ? card->driver_name : card->name);
1617         for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1618                 switch (card->snd_card->driver[i]) {
1619                 case '_':
1620                 case '-':
1621                 case '\0':
1622                         break;
1623                 default:
1624                         if (!isalnum(card->snd_card->driver[i]))
1625                                 card->snd_card->driver[i] = '_';
1626                         break;
1627                 }
1628         }
1629
1630         if (card->late_probe) {
1631                 ret = card->late_probe(card);
1632                 if (ret < 0) {
1633                         dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1634                                 card->name, ret);
1635                         goto probe_aux_dev_err;
1636                 }
1637         }
1638
1639         snd_soc_dapm_new_widgets(card);
1640
1641         ret = snd_card_register(card->snd_card);
1642         if (ret < 0) {
1643                 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1644                                 ret);
1645                 goto probe_aux_dev_err;
1646         }
1647
1648         card->instantiated = 1;
1649         snd_soc_dapm_sync(&card->dapm);
1650         mutex_unlock(&card->mutex);
1651
1652         return 0;
1653
1654 probe_aux_dev_err:
1655         for (i = 0; i < card->num_aux_devs; i++)
1656                 soc_remove_aux_dev(card, i);
1657
1658 probe_dai_err:
1659         soc_remove_dai_links(card);
1660
1661 card_probe_error:
1662         if (card->remove)
1663                 card->remove(card);
1664
1665         snd_card_free(card->snd_card);
1666
1667 base_error:
1668         mutex_unlock(&card->mutex);
1669
1670         return ret;
1671 }
1672
1673 /* probes a new socdev */
1674 static int soc_probe(struct platform_device *pdev)
1675 {
1676         struct snd_soc_card *card = platform_get_drvdata(pdev);
1677
1678         /*
1679          * no card, so machine driver should be registering card
1680          * we should not be here in that case so ret error
1681          */
1682         if (!card)
1683                 return -EINVAL;
1684
1685         dev_warn(&pdev->dev,
1686                  "ASoC: machine %s should use snd_soc_register_card()\n",
1687                  card->name);
1688
1689         /* Bodge while we unpick instantiation */
1690         card->dev = &pdev->dev;
1691
1692         return snd_soc_register_card(card);
1693 }
1694
1695 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1696 {
1697         int i;
1698
1699         /* make sure any delayed work runs */
1700         for (i = 0; i < card->num_rtd; i++) {
1701                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1702                 flush_delayed_work(&rtd->delayed_work);
1703         }
1704
1705         /* remove auxiliary devices */
1706         for (i = 0; i < card->num_aux_devs; i++)
1707                 soc_remove_aux_dev(card, i);
1708
1709         /* remove and free each DAI */
1710         soc_remove_dai_links(card);
1711
1712         soc_cleanup_card_debugfs(card);
1713
1714         /* remove the card */
1715         if (card->remove)
1716                 card->remove(card);
1717
1718         snd_soc_dapm_free(&card->dapm);
1719
1720         snd_card_free(card->snd_card);
1721         return 0;
1722
1723 }
1724
1725 /* removes a socdev */
1726 static int soc_remove(struct platform_device *pdev)
1727 {
1728         struct snd_soc_card *card = platform_get_drvdata(pdev);
1729
1730         snd_soc_unregister_card(card);
1731         return 0;
1732 }
1733
1734 int snd_soc_poweroff(struct device *dev)
1735 {
1736         struct snd_soc_card *card = dev_get_drvdata(dev);
1737         int i;
1738
1739         if (!card->instantiated)
1740                 return 0;
1741
1742         /* Flush out pmdown_time work - we actually do want to run it
1743          * now, we're shutting down so no imminent restart. */
1744         for (i = 0; i < card->num_rtd; i++) {
1745                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1746                 flush_delayed_work(&rtd->delayed_work);
1747         }
1748
1749         snd_soc_dapm_shutdown(card);
1750
1751         /* deactivate pins to sleep state */
1752         for (i = 0; i < card->num_rtd; i++) {
1753                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1754                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1755                 int j;
1756
1757                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1758                 for (j = 0; j < rtd->num_codecs; j++) {
1759                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1760                         pinctrl_pm_select_sleep_state(codec_dai->dev);
1761                 }
1762         }
1763
1764         return 0;
1765 }
1766 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1767
1768 const struct dev_pm_ops snd_soc_pm_ops = {
1769         .suspend = snd_soc_suspend,
1770         .resume = snd_soc_resume,
1771         .freeze = snd_soc_suspend,
1772         .thaw = snd_soc_resume,
1773         .poweroff = snd_soc_poweroff,
1774         .restore = snd_soc_resume,
1775 };
1776 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1777
1778 /* ASoC platform driver */
1779 static struct platform_driver soc_driver = {
1780         .driver         = {
1781                 .name           = "soc-audio",
1782                 .pm             = &snd_soc_pm_ops,
1783         },
1784         .probe          = soc_probe,
1785         .remove         = soc_remove,
1786 };
1787
1788 /**
1789  * snd_soc_cnew - create new control
1790  * @_template: control template
1791  * @data: control private data
1792  * @long_name: control long name
1793  * @prefix: control name prefix
1794  *
1795  * Create a new mixer control from a template control.
1796  *
1797  * Returns 0 for success, else error.
1798  */
1799 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1800                                   void *data, const char *long_name,
1801                                   const char *prefix)
1802 {
1803         struct snd_kcontrol_new template;
1804         struct snd_kcontrol *kcontrol;
1805         char *name = NULL;
1806
1807         memcpy(&template, _template, sizeof(template));
1808         template.index = 0;
1809
1810         if (!long_name)
1811                 long_name = template.name;
1812
1813         if (prefix) {
1814                 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1815                 if (!name)
1816                         return NULL;
1817
1818                 template.name = name;
1819         } else {
1820                 template.name = long_name;
1821         }
1822
1823         kcontrol = snd_ctl_new1(&template, data);
1824
1825         kfree(name);
1826
1827         return kcontrol;
1828 }
1829 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1830
1831 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1832         const struct snd_kcontrol_new *controls, int num_controls,
1833         const char *prefix, void *data)
1834 {
1835         int err, i;
1836
1837         for (i = 0; i < num_controls; i++) {
1838                 const struct snd_kcontrol_new *control = &controls[i];
1839                 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1840                                                      control->name, prefix));
1841                 if (err < 0) {
1842                         dev_err(dev, "ASoC: Failed to add %s: %d\n",
1843                                 control->name, err);
1844                         return err;
1845                 }
1846         }
1847
1848         return 0;
1849 }
1850
1851 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1852                                                const char *name)
1853 {
1854         struct snd_card *card = soc_card->snd_card;
1855         struct snd_kcontrol *kctl;
1856
1857         if (unlikely(!name))
1858                 return NULL;
1859
1860         list_for_each_entry(kctl, &card->controls, list)
1861                 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1862                         return kctl;
1863         return NULL;
1864 }
1865 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1866
1867 /**
1868  * snd_soc_add_component_controls - Add an array of controls to a component.
1869  *
1870  * @component: Component to add controls to
1871  * @controls: Array of controls to add
1872  * @num_controls: Number of elements in the array
1873  *
1874  * Return: 0 for success, else error.
1875  */
1876 int snd_soc_add_component_controls(struct snd_soc_component *component,
1877         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1878 {
1879         struct snd_card *card = component->card->snd_card;
1880
1881         return snd_soc_add_controls(card, component->dev, controls,
1882                         num_controls, component->name_prefix, component);
1883 }
1884 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1885
1886 /**
1887  * snd_soc_add_codec_controls - add an array of controls to a codec.
1888  * Convenience function to add a list of controls. Many codecs were
1889  * duplicating this code.
1890  *
1891  * @codec: codec to add controls to
1892  * @controls: array of controls to add
1893  * @num_controls: number of elements in the array
1894  *
1895  * Return 0 for success, else error.
1896  */
1897 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1898         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1899 {
1900         return snd_soc_add_component_controls(&codec->component, controls,
1901                 num_controls);
1902 }
1903 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1904
1905 /**
1906  * snd_soc_add_platform_controls - add an array of controls to a platform.
1907  * Convenience function to add a list of controls.
1908  *
1909  * @platform: platform to add controls to
1910  * @controls: array of controls to add
1911  * @num_controls: number of elements in the array
1912  *
1913  * Return 0 for success, else error.
1914  */
1915 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1916         const struct snd_kcontrol_new *controls, unsigned int num_controls)
1917 {
1918         return snd_soc_add_component_controls(&platform->component, controls,
1919                 num_controls);
1920 }
1921 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1922
1923 /**
1924  * snd_soc_add_card_controls - add an array of controls to a SoC card.
1925  * Convenience function to add a list of controls.
1926  *
1927  * @soc_card: SoC card to add controls to
1928  * @controls: array of controls to add
1929  * @num_controls: number of elements in the array
1930  *
1931  * Return 0 for success, else error.
1932  */
1933 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1934         const struct snd_kcontrol_new *controls, int num_controls)
1935 {
1936         struct snd_card *card = soc_card->snd_card;
1937
1938         return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
1939                         NULL, soc_card);
1940 }
1941 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
1942
1943 /**
1944  * snd_soc_add_dai_controls - add an array of controls to a DAI.
1945  * Convienience function to add a list of controls.
1946  *
1947  * @dai: DAI to add controls to
1948  * @controls: array of controls to add
1949  * @num_controls: number of elements in the array
1950  *
1951  * Return 0 for success, else error.
1952  */
1953 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
1954         const struct snd_kcontrol_new *controls, int num_controls)
1955 {
1956         struct snd_card *card = dai->component->card->snd_card;
1957
1958         return snd_soc_add_controls(card, dai->dev, controls, num_controls,
1959                         NULL, dai);
1960 }
1961 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
1962
1963 /**
1964  * snd_soc_dai_set_sysclk - configure DAI system or master clock.
1965  * @dai: DAI
1966  * @clk_id: DAI specific clock ID
1967  * @freq: new clock frequency in Hz
1968  * @dir: new clock direction - input/output.
1969  *
1970  * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
1971  */
1972 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
1973         unsigned int freq, int dir)
1974 {
1975         if (dai->driver && dai->driver->ops->set_sysclk)
1976                 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
1977         else if (dai->codec && dai->codec->driver->set_sysclk)
1978                 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
1979                                                       freq, dir);
1980         else
1981                 return -ENOTSUPP;
1982 }
1983 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
1984
1985 /**
1986  * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
1987  * @codec: CODEC
1988  * @clk_id: DAI specific clock ID
1989  * @source: Source for the clock
1990  * @freq: new clock frequency in Hz
1991  * @dir: new clock direction - input/output.
1992  *
1993  * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
1994  */
1995 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
1996                              int source, unsigned int freq, int dir)
1997 {
1998         if (codec->driver->set_sysclk)
1999                 return codec->driver->set_sysclk(codec, clk_id, source,
2000                                                  freq, dir);
2001         else
2002                 return -ENOTSUPP;
2003 }
2004 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2005
2006 /**
2007  * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2008  * @dai: DAI
2009  * @div_id: DAI specific clock divider ID
2010  * @div: new clock divisor.
2011  *
2012  * Configures the clock dividers. This is used to derive the best DAI bit and
2013  * frame clocks from the system or master clock. It's best to set the DAI bit
2014  * and frame clocks as low as possible to save system power.
2015  */
2016 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2017         int div_id, int div)
2018 {
2019         if (dai->driver && dai->driver->ops->set_clkdiv)
2020                 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2021         else
2022                 return -EINVAL;
2023 }
2024 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2025
2026 /**
2027  * snd_soc_dai_set_pll - configure DAI PLL.
2028  * @dai: DAI
2029  * @pll_id: DAI specific PLL ID
2030  * @source: DAI specific source for the PLL
2031  * @freq_in: PLL input clock frequency in Hz
2032  * @freq_out: requested PLL output clock frequency in Hz
2033  *
2034  * Configures and enables PLL to generate output clock based on input clock.
2035  */
2036 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2037         unsigned int freq_in, unsigned int freq_out)
2038 {
2039         if (dai->driver && dai->driver->ops->set_pll)
2040                 return dai->driver->ops->set_pll(dai, pll_id, source,
2041                                          freq_in, freq_out);
2042         else if (dai->codec && dai->codec->driver->set_pll)
2043                 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2044                                                    freq_in, freq_out);
2045         else
2046                 return -EINVAL;
2047 }
2048 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2049
2050 /*
2051  * snd_soc_codec_set_pll - configure codec PLL.
2052  * @codec: CODEC
2053  * @pll_id: DAI specific PLL ID
2054  * @source: DAI specific source for the PLL
2055  * @freq_in: PLL input clock frequency in Hz
2056  * @freq_out: requested PLL output clock frequency in Hz
2057  *
2058  * Configures and enables PLL to generate output clock based on input clock.
2059  */
2060 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2061                           unsigned int freq_in, unsigned int freq_out)
2062 {
2063         if (codec->driver->set_pll)
2064                 return codec->driver->set_pll(codec, pll_id, source,
2065                                               freq_in, freq_out);
2066         else
2067                 return -EINVAL;
2068 }
2069 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2070
2071 /**
2072  * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2073  * @dai: DAI
2074  * @ratio Ratio of BCLK to Sample rate.
2075  *
2076  * Configures the DAI for a preset BCLK to sample rate ratio.
2077  */
2078 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2079 {
2080         if (dai->driver && dai->driver->ops->set_bclk_ratio)
2081                 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2082         else
2083                 return -EINVAL;
2084 }
2085 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2086
2087 /**
2088  * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2089  * @dai: DAI
2090  * @fmt: SND_SOC_DAIFMT_ format value.
2091  *
2092  * Configures the DAI hardware format and clocking.
2093  */
2094 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2095 {
2096         if (dai->driver == NULL)
2097                 return -EINVAL;
2098         if (dai->driver->ops->set_fmt == NULL)
2099                 return -ENOTSUPP;
2100         return dai->driver->ops->set_fmt(dai, fmt);
2101 }
2102 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2103
2104 /**
2105  * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2106  * @slots: Number of slots in use.
2107  * @tx_mask: bitmask representing active TX slots.
2108  * @rx_mask: bitmask representing active RX slots.
2109  *
2110  * Generates the TDM tx and rx slot default masks for DAI.
2111  */
2112 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2113                                           unsigned int *tx_mask,
2114                                           unsigned int *rx_mask)
2115 {
2116         if (*tx_mask || *rx_mask)
2117                 return 0;
2118
2119         if (!slots)
2120                 return -EINVAL;
2121
2122         *tx_mask = (1 << slots) - 1;
2123         *rx_mask = (1 << slots) - 1;
2124
2125         return 0;
2126 }
2127
2128 /**
2129  * snd_soc_dai_set_tdm_slot - configure DAI TDM.
2130  * @dai: DAI
2131  * @tx_mask: bitmask representing active TX slots.
2132  * @rx_mask: bitmask representing active RX slots.
2133  * @slots: Number of slots in use.
2134  * @slot_width: Width in bits for each slot.
2135  *
2136  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
2137  * specific.
2138  */
2139 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2140         unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2141 {
2142         if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2143                 dai->driver->ops->xlate_tdm_slot_mask(slots,
2144                                                 &tx_mask, &rx_mask);
2145         else
2146                 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2147
2148         dai->tx_mask = tx_mask;
2149         dai->rx_mask = rx_mask;
2150
2151         if (dai->driver && dai->driver->ops->set_tdm_slot)
2152                 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2153                                 slots, slot_width);
2154         else
2155                 return -ENOTSUPP;
2156 }
2157 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2158
2159 /**
2160  * snd_soc_dai_set_channel_map - configure DAI audio channel map
2161  * @dai: DAI
2162  * @tx_num: how many TX channels
2163  * @tx_slot: pointer to an array which imply the TX slot number channel
2164  *           0~num-1 uses
2165  * @rx_num: how many RX channels
2166  * @rx_slot: pointer to an array which imply the RX slot number channel
2167  *           0~num-1 uses
2168  *
2169  * configure the relationship between channel number and TDM slot number.
2170  */
2171 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2172         unsigned int tx_num, unsigned int *tx_slot,
2173         unsigned int rx_num, unsigned int *rx_slot)
2174 {
2175         if (dai->driver && dai->driver->ops->set_channel_map)
2176                 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2177                         rx_num, rx_slot);
2178         else
2179                 return -EINVAL;
2180 }
2181 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2182
2183 /**
2184  * snd_soc_dai_set_tristate - configure DAI system or master clock.
2185  * @dai: DAI
2186  * @tristate: tristate enable
2187  *
2188  * Tristates the DAI so that others can use it.
2189  */
2190 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2191 {
2192         if (dai->driver && dai->driver->ops->set_tristate)
2193                 return dai->driver->ops->set_tristate(dai, tristate);
2194         else
2195                 return -EINVAL;
2196 }
2197 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2198
2199 /**
2200  * snd_soc_dai_digital_mute - configure DAI system or master clock.
2201  * @dai: DAI
2202  * @mute: mute enable
2203  * @direction: stream to mute
2204  *
2205  * Mutes the DAI DAC.
2206  */
2207 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2208                              int direction)
2209 {
2210         if (!dai->driver)
2211                 return -ENOTSUPP;
2212
2213         if (dai->driver->ops->mute_stream)
2214                 return dai->driver->ops->mute_stream(dai, mute, direction);
2215         else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2216                  dai->driver->ops->digital_mute)
2217                 return dai->driver->ops->digital_mute(dai, mute);
2218         else
2219                 return -ENOTSUPP;
2220 }
2221 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2222
2223 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2224                                    struct snd_soc_dai_link *dai_link)
2225 {
2226         /* Legacy codec/codec_dai link is a single entry in multicodec */
2227         if (dai_link->codec_name || dai_link->codec_of_node ||
2228             dai_link->codec_dai_name) {
2229                 dai_link->num_codecs = 1;
2230
2231                 dai_link->codecs = devm_kzalloc(card->dev,
2232                                 sizeof(struct snd_soc_dai_link_component),
2233                                 GFP_KERNEL);
2234                 if (!dai_link->codecs)
2235                         return -ENOMEM;
2236
2237                 dai_link->codecs[0].name = dai_link->codec_name;
2238                 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2239                 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2240         }
2241
2242         if (!dai_link->codecs) {
2243                 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2244                 return -EINVAL;
2245         }
2246
2247         return 0;
2248 }
2249
2250 /**
2251  * snd_soc_register_card - Register a card with the ASoC core
2252  *
2253  * @card: Card to register
2254  *
2255  */
2256 int snd_soc_register_card(struct snd_soc_card *card)
2257 {
2258         int i, j, ret;
2259
2260         if (!card->name || !card->dev)
2261                 return -EINVAL;
2262
2263         for (i = 0; i < card->num_links; i++) {
2264                 struct snd_soc_dai_link *link = &card->dai_link[i];
2265
2266                 ret = snd_soc_init_multicodec(card, link);
2267                 if (ret) {
2268                         dev_err(card->dev, "ASoC: failed to init multicodec\n");
2269                         return ret;
2270                 }
2271
2272                 for (j = 0; j < link->num_codecs; j++) {
2273                         /*
2274                          * Codec must be specified by 1 of name or OF node,
2275                          * not both or neither.
2276                          */
2277                         if (!!link->codecs[j].name ==
2278                             !!link->codecs[j].of_node) {
2279                                 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2280                                         link->name);
2281                                 return -EINVAL;
2282                         }
2283                         /* Codec DAI name must be specified */
2284                         if (!link->codecs[j].dai_name) {
2285                                 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2286                                         link->name);
2287                                 return -EINVAL;
2288                         }
2289                 }
2290
2291                 /*
2292                  * Platform may be specified by either name or OF node, but
2293                  * can be left unspecified, and a dummy platform will be used.
2294                  */
2295                 if (link->platform_name && link->platform_of_node) {
2296                         dev_err(card->dev,
2297                                 "ASoC: Both platform name/of_node are set for %s\n",
2298                                 link->name);
2299                         return -EINVAL;
2300                 }
2301
2302                 /*
2303                  * CPU device may be specified by either name or OF node, but
2304                  * can be left unspecified, and will be matched based on DAI
2305                  * name alone..
2306                  */
2307                 if (link->cpu_name && link->cpu_of_node) {
2308                         dev_err(card->dev,
2309                                 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2310                                 link->name);
2311                         return -EINVAL;
2312                 }
2313                 /*
2314                  * At least one of CPU DAI name or CPU device name/node must be
2315                  * specified
2316                  */
2317                 if (!link->cpu_dai_name &&
2318                     !(link->cpu_name || link->cpu_of_node)) {
2319                         dev_err(card->dev,
2320                                 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2321                                 link->name);
2322                         return -EINVAL;
2323                 }
2324         }
2325
2326         dev_set_drvdata(card->dev, card);
2327
2328         snd_soc_initialize_card_lists(card);
2329
2330         soc_init_card_debugfs(card);
2331
2332         card->rtd = devm_kzalloc(card->dev,
2333                                  sizeof(struct snd_soc_pcm_runtime) *
2334                                  (card->num_links + card->num_aux_devs),
2335                                  GFP_KERNEL);
2336         if (card->rtd == NULL)
2337                 return -ENOMEM;
2338         card->num_rtd = 0;
2339         card->rtd_aux = &card->rtd[card->num_links];
2340
2341         for (i = 0; i < card->num_links; i++) {
2342                 card->rtd[i].card = card;
2343                 card->rtd[i].dai_link = &card->dai_link[i];
2344                 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2345                                         sizeof(struct snd_soc_dai *) *
2346                                         (card->rtd[i].dai_link->num_codecs),
2347                                         GFP_KERNEL);
2348                 if (card->rtd[i].codec_dais == NULL)
2349                         return -ENOMEM;
2350         }
2351
2352         for (i = 0; i < card->num_aux_devs; i++)
2353                 card->rtd_aux[i].card = card;
2354
2355         INIT_LIST_HEAD(&card->dapm_dirty);
2356         card->instantiated = 0;
2357         mutex_init(&card->mutex);
2358         mutex_init(&card->dapm_mutex);
2359
2360         ret = snd_soc_instantiate_card(card);
2361         if (ret != 0)
2362                 soc_cleanup_card_debugfs(card);
2363
2364         /* deactivate pins to sleep state */
2365         for (i = 0; i < card->num_rtd; i++) {
2366                 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2367                 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2368                 int j;
2369
2370                 for (j = 0; j < rtd->num_codecs; j++) {
2371                         struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2372                         if (!codec_dai->active)
2373                                 pinctrl_pm_select_sleep_state(codec_dai->dev);
2374                 }
2375
2376                 if (!cpu_dai->active)
2377                         pinctrl_pm_select_sleep_state(cpu_dai->dev);
2378         }
2379
2380         return ret;
2381 }
2382 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2383
2384 /**
2385  * snd_soc_unregister_card - Unregister a card with the ASoC core
2386  *
2387  * @card: Card to unregister
2388  *
2389  */
2390 int snd_soc_unregister_card(struct snd_soc_card *card)
2391 {
2392         if (card->instantiated) {
2393                 card->instantiated = false;
2394                 snd_soc_dapm_shutdown(card);
2395                 soc_cleanup_card_resources(card);
2396         }
2397         dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2398
2399         return 0;
2400 }
2401 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2402
2403 /*
2404  * Simplify DAI link configuration by removing ".-1" from device names
2405  * and sanitizing names.
2406  */
2407 static char *fmt_single_name(struct device *dev, int *id)
2408 {
2409         char *found, name[NAME_SIZE];
2410         int id1, id2;
2411
2412         if (dev_name(dev) == NULL)
2413                 return NULL;
2414
2415         strlcpy(name, dev_name(dev), NAME_SIZE);
2416
2417         /* are we a "%s.%d" name (platform and SPI components) */
2418         found = strstr(name, dev->driver->name);
2419         if (found) {
2420                 /* get ID */
2421                 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2422
2423                         /* discard ID from name if ID == -1 */
2424                         if (*id == -1)
2425                                 found[strlen(dev->driver->name)] = '\0';
2426                 }
2427
2428         } else {
2429                 /* I2C component devices are named "bus-addr"  */
2430                 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2431                         char tmp[NAME_SIZE];
2432
2433                         /* create unique ID number from I2C addr and bus */
2434                         *id = ((id1 & 0xffff) << 16) + id2;
2435
2436                         /* sanitize component name for DAI link creation */
2437                         snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2438                         strlcpy(name, tmp, NAME_SIZE);
2439                 } else
2440                         *id = 0;
2441         }
2442
2443         return kstrdup(name, GFP_KERNEL);
2444 }
2445
2446 /*
2447  * Simplify DAI link naming for single devices with multiple DAIs by removing
2448  * any ".-1" and using the DAI name (instead of device name).
2449  */
2450 static inline char *fmt_multiple_name(struct device *dev,
2451                 struct snd_soc_dai_driver *dai_drv)
2452 {
2453         if (dai_drv->name == NULL) {
2454                 dev_err(dev,
2455                         "ASoC: error - multiple DAI %s registered with no name\n",
2456                         dev_name(dev));
2457                 return NULL;
2458         }
2459
2460         return kstrdup(dai_drv->name, GFP_KERNEL);
2461 }
2462
2463 /**
2464  * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2465  *
2466  * @component: The component for which the DAIs should be unregistered
2467  */
2468 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2469 {
2470         struct snd_soc_dai *dai, *_dai;
2471
2472         list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2473                 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2474                         dai->name);
2475                 list_del(&dai->list);
2476                 kfree(dai->name);
2477                 kfree(dai);
2478         }
2479 }
2480
2481 /**
2482  * snd_soc_register_dais - Register a DAI with the ASoC core
2483  *
2484  * @component: The component the DAIs are registered for
2485  * @dai_drv: DAI driver to use for the DAIs
2486  * @count: Number of DAIs
2487  * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2488  *                     parent's name.
2489  */
2490 static int snd_soc_register_dais(struct snd_soc_component *component,
2491         struct snd_soc_dai_driver *dai_drv, size_t count,
2492         bool legacy_dai_naming)
2493 {
2494         struct device *dev = component->dev;
2495         struct snd_soc_dai *dai;
2496         unsigned int i;
2497         int ret;
2498
2499         dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2500
2501         component->dai_drv = dai_drv;
2502         component->num_dai = count;
2503
2504         for (i = 0; i < count; i++) {
2505
2506                 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2507                 if (dai == NULL) {
2508                         ret = -ENOMEM;
2509                         goto err;
2510                 }
2511
2512                 /*
2513                  * Back in the old days when we still had component-less DAIs,
2514                  * instead of having a static name, component-less DAIs would
2515                  * inherit the name of the parent device so it is possible to
2516                  * register multiple instances of the DAI. We still need to keep
2517                  * the same naming style even though those DAIs are not
2518                  * component-less anymore.
2519                  */
2520                 if (count == 1 && legacy_dai_naming) {
2521                         dai->name = fmt_single_name(dev, &dai->id);
2522                 } else {
2523                         dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2524                         if (dai_drv[i].id)
2525                                 dai->id = dai_drv[i].id;
2526                         else
2527                                 dai->id = i;
2528                 }
2529                 if (dai->name == NULL) {
2530                         kfree(dai);
2531                         ret = -ENOMEM;
2532                         goto err;
2533                 }
2534
2535                 dai->component = component;
2536                 dai->dev = dev;
2537                 dai->driver = &dai_drv[i];
2538                 if (!dai->driver->ops)
2539                         dai->driver->ops = &null_dai_ops;
2540
2541                 list_add(&dai->list, &component->dai_list);
2542
2543                 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2544         }
2545
2546         return 0;
2547
2548 err:
2549         snd_soc_unregister_dais(component);
2550
2551         return ret;
2552 }
2553
2554 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2555         enum snd_soc_dapm_type type, int subseq)
2556 {
2557         struct snd_soc_component *component = dapm->component;
2558
2559         component->driver->seq_notifier(component, type, subseq);
2560 }
2561
2562 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2563         int event)
2564 {
2565         struct snd_soc_component *component = dapm->component;
2566
2567         return component->driver->stream_event(component, event);
2568 }
2569
2570 static int snd_soc_component_initialize(struct snd_soc_component *component,
2571         const struct snd_soc_component_driver *driver, struct device *dev)
2572 {
2573         struct snd_soc_dapm_context *dapm;
2574
2575         component->name = fmt_single_name(dev, &component->id);
2576         if (!component->name) {
2577                 dev_err(dev, "ASoC: Failed to allocate name\n");
2578                 return -ENOMEM;
2579         }
2580
2581         component->dev = dev;
2582         component->driver = driver;
2583         component->probe = component->driver->probe;
2584         component->remove = component->driver->remove;
2585
2586         if (!component->dapm_ptr)
2587                 component->dapm_ptr = &component->dapm;
2588
2589         dapm = component->dapm_ptr;
2590         dapm->dev = dev;
2591         dapm->component = component;
2592         dapm->bias_level = SND_SOC_BIAS_OFF;
2593         dapm->idle_bias_off = true;
2594         if (driver->seq_notifier)
2595                 dapm->seq_notifier = snd_soc_component_seq_notifier;
2596         if (driver->stream_event)
2597                 dapm->stream_event = snd_soc_component_stream_event;
2598
2599         component->controls = driver->controls;
2600         component->num_controls = driver->num_controls;
2601         component->dapm_widgets = driver->dapm_widgets;
2602         component->num_dapm_widgets = driver->num_dapm_widgets;
2603         component->dapm_routes = driver->dapm_routes;
2604         component->num_dapm_routes = driver->num_dapm_routes;
2605
2606         INIT_LIST_HEAD(&component->dai_list);
2607         mutex_init(&component->io_mutex);
2608
2609         return 0;
2610 }
2611
2612 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2613 {
2614         int val_bytes = regmap_get_val_bytes(component->regmap);
2615
2616         /* Errors are legitimate for non-integer byte multiples */
2617         if (val_bytes > 0)
2618                 component->val_bytes = val_bytes;
2619 }
2620
2621 #ifdef CONFIG_REGMAP
2622
2623 /**
2624  * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2625  * @component: The component for which to initialize the regmap instance
2626  * @regmap: The regmap instance that should be used by the component
2627  *
2628  * This function allows deferred assignment of the regmap instance that is
2629  * associated with the component. Only use this if the regmap instance is not
2630  * yet ready when the component is registered. The function must also be called
2631  * before the first IO attempt of the component.
2632  */
2633 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2634         struct regmap *regmap)
2635 {
2636         component->regmap = regmap;
2637         snd_soc_component_setup_regmap(component);
2638 }
2639 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2640
2641 /**
2642  * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2643  * @component: The component for which to de-initialize the regmap instance
2644  *
2645  * Calls regmap_exit() on the regmap instance associated to the component and
2646  * removes the regmap instance from the component.
2647  *
2648  * This function should only be used if snd_soc_component_init_regmap() was used
2649  * to initialize the regmap instance.
2650  */
2651 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2652 {
2653         regmap_exit(component->regmap);
2654         component->regmap = NULL;
2655 }
2656 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2657
2658 #endif
2659
2660 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2661 {
2662         if (!component->write && !component->read) {
2663                 if (!component->regmap)
2664                         component->regmap = dev_get_regmap(component->dev, NULL);
2665                 if (component->regmap)
2666                         snd_soc_component_setup_regmap(component);
2667         }
2668
2669         list_add(&component->list, &component_list);
2670 }
2671
2672 static void snd_soc_component_add(struct snd_soc_component *component)
2673 {
2674         mutex_lock(&client_mutex);
2675         snd_soc_component_add_unlocked(component);
2676         mutex_unlock(&client_mutex);
2677 }
2678
2679 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2680 {
2681         snd_soc_unregister_dais(component);
2682         kfree(component->name);
2683 }
2684
2685 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2686 {
2687         list_del(&component->list);
2688 }
2689
2690 static void snd_soc_component_del(struct snd_soc_component *component)
2691 {
2692         mutex_lock(&client_mutex);
2693         snd_soc_component_del_unlocked(component);
2694         mutex_unlock(&client_mutex);
2695 }
2696
2697 int snd_soc_register_component(struct device *dev,
2698                                const struct snd_soc_component_driver *cmpnt_drv,
2699                                struct snd_soc_dai_driver *dai_drv,
2700                                int num_dai)
2701 {
2702         struct snd_soc_component *cmpnt;
2703         int ret;
2704
2705         cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2706         if (!cmpnt) {
2707                 dev_err(dev, "ASoC: Failed to allocate memory\n");
2708                 return -ENOMEM;
2709         }
2710
2711         ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2712         if (ret)
2713                 goto err_free;
2714
2715         cmpnt->ignore_pmdown_time = true;
2716         cmpnt->registered_as_component = true;
2717
2718         ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2719         if (ret < 0) {
2720                 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
2721                 goto err_cleanup;
2722         }
2723
2724         snd_soc_component_add(cmpnt);
2725
2726         return 0;
2727
2728 err_cleanup:
2729         snd_soc_component_cleanup(cmpnt);
2730 err_free:
2731         kfree(cmpnt);
2732         return ret;
2733 }
2734 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2735
2736 /**
2737  * snd_soc_unregister_component - Unregister a component from the ASoC core
2738  *
2739  */
2740 void snd_soc_unregister_component(struct device *dev)
2741 {
2742         struct snd_soc_component *cmpnt;
2743
2744         list_for_each_entry(cmpnt, &component_list, list) {
2745                 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2746                         goto found;
2747         }
2748         return;
2749
2750 found:
2751         snd_soc_component_del(cmpnt);
2752         snd_soc_component_cleanup(cmpnt);
2753         kfree(cmpnt);
2754 }
2755 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2756
2757 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2758 {
2759         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2760
2761         return platform->driver->probe(platform);
2762 }
2763
2764 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2765 {
2766         struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2767
2768         platform->driver->remove(platform);
2769 }
2770
2771 /**
2772  * snd_soc_add_platform - Add a platform to the ASoC core
2773  * @dev: The parent device for the platform
2774  * @platform: The platform to add
2775  * @platform_driver: The driver for the platform
2776  */
2777 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2778                 const struct snd_soc_platform_driver *platform_drv)
2779 {
2780         int ret;
2781
2782         ret = snd_soc_component_initialize(&platform->component,
2783                         &platform_drv->component_driver, dev);
2784         if (ret)
2785                 return ret;
2786
2787         platform->dev = dev;
2788         platform->driver = platform_drv;
2789
2790         if (platform_drv->probe)
2791                 platform->component.probe = snd_soc_platform_drv_probe;
2792         if (platform_drv->remove)
2793                 platform->component.remove = snd_soc_platform_drv_remove;
2794
2795 #ifdef CONFIG_DEBUG_FS
2796         platform->component.debugfs_prefix = "platform";
2797 #endif
2798
2799         mutex_lock(&client_mutex);
2800         snd_soc_component_add_unlocked(&platform->component);
2801         list_add(&platform->list, &platform_list);
2802         mutex_unlock(&client_mutex);
2803
2804         dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2805                 platform->component.name);
2806
2807         return 0;
2808 }
2809 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2810
2811 /**
2812  * snd_soc_register_platform - Register a platform with the ASoC core
2813  *
2814  * @platform: platform to register
2815  */
2816 int snd_soc_register_platform(struct device *dev,
2817                 const struct snd_soc_platform_driver *platform_drv)
2818 {
2819         struct snd_soc_platform *platform;
2820         int ret;
2821
2822         dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2823
2824         platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2825         if (platform == NULL)
2826                 return -ENOMEM;
2827
2828         ret = snd_soc_add_platform(dev, platform, platform_drv);
2829         if (ret)
2830                 kfree(platform);
2831
2832         return ret;
2833 }
2834 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2835
2836 /**
2837  * snd_soc_remove_platform - Remove a platform from the ASoC core
2838  * @platform: the platform to remove
2839  */
2840 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2841 {
2842
2843         mutex_lock(&client_mutex);
2844         list_del(&platform->list);
2845         snd_soc_component_del_unlocked(&platform->component);
2846         mutex_unlock(&client_mutex);
2847
2848         dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2849                 platform->component.name);
2850
2851         snd_soc_component_cleanup(&platform->component);
2852 }
2853 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2854
2855 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2856 {
2857         struct snd_soc_platform *platform;
2858
2859         list_for_each_entry(platform, &platform_list, list) {
2860                 if (dev == platform->dev)
2861                         return platform;
2862         }
2863
2864         return NULL;
2865 }
2866 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2867
2868 /**
2869  * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2870  *
2871  * @platform: platform to unregister
2872  */
2873 void snd_soc_unregister_platform(struct device *dev)
2874 {
2875         struct snd_soc_platform *platform;
2876
2877         platform = snd_soc_lookup_platform(dev);
2878         if (!platform)
2879                 return;
2880
2881         snd_soc_remove_platform(platform);
2882         kfree(platform);
2883 }
2884 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2885
2886 static u64 codec_format_map[] = {
2887         SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2888         SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2889         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2890         SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2891         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2892         SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2893         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2894         SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2895         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2896         SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2897         SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2898         SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2899         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2900         SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2901         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2902         | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2903 };
2904
2905 /* Fix up the DAI formats for endianness: codecs don't actually see
2906  * the endianness of the data but we're using the CPU format
2907  * definitions which do need to include endianness so we ensure that
2908  * codec DAIs always have both big and little endian variants set.
2909  */
2910 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2911 {
2912         int i;
2913
2914         for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2915                 if (stream->formats & codec_format_map[i])
2916                         stream->formats |= codec_format_map[i];
2917 }
2918
2919 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2920 {
2921         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2922
2923         return codec->driver->probe(codec);
2924 }
2925
2926 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
2927 {
2928         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2929
2930         codec->driver->remove(codec);
2931 }
2932
2933 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
2934         unsigned int reg, unsigned int val)
2935 {
2936         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2937
2938         return codec->driver->write(codec, reg, val);
2939 }
2940
2941 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
2942         unsigned int reg, unsigned int *val)
2943 {
2944         struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2945
2946         *val = codec->driver->read(codec, reg);
2947
2948         return 0;
2949 }
2950
2951 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
2952         enum snd_soc_bias_level level)
2953 {
2954         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
2955
2956         return codec->driver->set_bias_level(codec, level);
2957 }
2958
2959 /**
2960  * snd_soc_register_codec - Register a codec with the ASoC core
2961  *
2962  * @codec: codec to register
2963  */
2964 int snd_soc_register_codec(struct device *dev,
2965                            const struct snd_soc_codec_driver *codec_drv,
2966                            struct snd_soc_dai_driver *dai_drv,
2967                            int num_dai)
2968 {
2969         struct snd_soc_codec *codec;
2970         struct snd_soc_dai *dai;
2971         int ret, i;
2972
2973         dev_dbg(dev, "codec register %s\n", dev_name(dev));
2974
2975         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
2976         if (codec == NULL)
2977                 return -ENOMEM;
2978
2979         codec->component.dapm_ptr = &codec->dapm;
2980         codec->component.codec = codec;
2981
2982         ret = snd_soc_component_initialize(&codec->component,
2983                         &codec_drv->component_driver, dev);
2984         if (ret)
2985                 goto err_free;
2986
2987         if (codec_drv->controls) {
2988                 codec->component.controls = codec_drv->controls;
2989                 codec->component.num_controls = codec_drv->num_controls;
2990         }
2991         if (codec_drv->dapm_widgets) {
2992                 codec->component.dapm_widgets = codec_drv->dapm_widgets;
2993                 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
2994         }
2995         if (codec_drv->dapm_routes) {
2996                 codec->component.dapm_routes = codec_drv->dapm_routes;
2997                 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
2998         }
2999
3000         if (codec_drv->probe)
3001                 codec->component.probe = snd_soc_codec_drv_probe;
3002         if (codec_drv->remove)
3003                 codec->component.remove = snd_soc_codec_drv_remove;
3004         if (codec_drv->write)
3005                 codec->component.write = snd_soc_codec_drv_write;
3006         if (codec_drv->read)
3007                 codec->component.read = snd_soc_codec_drv_read;
3008         codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3009         codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3010         codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3011         if (codec_drv->seq_notifier)
3012                 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3013         if (codec_drv->set_bias_level)
3014                 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3015         codec->dev = dev;
3016         codec->driver = codec_drv;
3017         codec->component.val_bytes = codec_drv->reg_word_size;
3018
3019 #ifdef CONFIG_DEBUG_FS
3020         codec->component.init_debugfs = soc_init_codec_debugfs;
3021         codec->component.debugfs_prefix = "codec";
3022 #endif
3023
3024         if (codec_drv->get_regmap)
3025                 codec->component.regmap = codec_drv->get_regmap(dev);
3026
3027         for (i = 0; i < num_dai; i++) {
3028                 fixup_codec_formats(&dai_drv[i].playback);
3029                 fixup_codec_formats(&dai_drv[i].capture);
3030         }
3031
3032         ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3033         if (ret < 0) {
3034                 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
3035                 goto err_cleanup;
3036         }
3037
3038         list_for_each_entry(dai, &codec->component.dai_list, list)
3039                 dai->codec = codec;
3040
3041         mutex_lock(&client_mutex);
3042         snd_soc_component_add_unlocked(&codec->component);
3043         list_add(&codec->list, &codec_list);
3044         mutex_unlock(&client_mutex);
3045
3046         dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3047                 codec->component.name);
3048         return 0;
3049
3050 err_cleanup:
3051         snd_soc_component_cleanup(&codec->component);
3052 err_free:
3053         kfree(codec);
3054         return ret;
3055 }
3056 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3057
3058 /**
3059  * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3060  *
3061  * @codec: codec to unregister
3062  */
3063 void snd_soc_unregister_codec(struct device *dev)
3064 {
3065         struct snd_soc_codec *codec;
3066
3067         list_for_each_entry(codec, &codec_list, list) {
3068                 if (dev == codec->dev)
3069                         goto found;
3070         }
3071         return;
3072
3073 found:
3074
3075         mutex_lock(&client_mutex);
3076         list_del(&codec->list);
3077         snd_soc_component_del_unlocked(&codec->component);
3078         mutex_unlock(&client_mutex);
3079
3080         dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3081                         codec->component.name);
3082
3083         snd_soc_component_cleanup(&codec->component);
3084         snd_soc_cache_exit(codec);
3085         kfree(codec);
3086 }
3087 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3088
3089 /* Retrieve a card's name from device tree */
3090 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3091                                const char *propname)
3092 {
3093         struct device_node *np;
3094         int ret;
3095
3096         if (!card->dev) {
3097                 pr_err("card->dev is not set before calling %s\n", __func__);
3098                 return -EINVAL;
3099         }
3100
3101         np = card->dev->of_node;
3102
3103         ret = of_property_read_string_index(np, propname, 0, &card->name);
3104         /*
3105          * EINVAL means the property does not exist. This is fine providing
3106          * card->name was previously set, which is checked later in
3107          * snd_soc_register_card.
3108          */
3109         if (ret < 0 && ret != -EINVAL) {
3110                 dev_err(card->dev,
3111                         "ASoC: Property '%s' could not be read: %d\n",
3112                         propname, ret);
3113                 return ret;
3114         }
3115
3116         return 0;
3117 }
3118 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3119
3120 static const struct snd_soc_dapm_widget simple_widgets[] = {
3121         SND_SOC_DAPM_MIC("Microphone", NULL),
3122         SND_SOC_DAPM_LINE("Line", NULL),
3123         SND_SOC_DAPM_HP("Headphone", NULL),
3124         SND_SOC_DAPM_SPK("Speaker", NULL),
3125 };
3126
3127 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3128                                           const char *propname)
3129 {
3130         struct device_node *np = card->dev->of_node;
3131         struct snd_soc_dapm_widget *widgets;
3132         const char *template, *wname;
3133         int i, j, num_widgets, ret;
3134
3135         num_widgets = of_property_count_strings(np, propname);
3136         if (num_widgets < 0) {
3137                 dev_err(card->dev,
3138                         "ASoC: Property '%s' does not exist\n", propname);
3139                 return -EINVAL;
3140         }
3141         if (num_widgets & 1) {
3142                 dev_err(card->dev,
3143                         "ASoC: Property '%s' length is not even\n", propname);
3144                 return -EINVAL;
3145         }
3146
3147         num_widgets /= 2;
3148         if (!num_widgets) {
3149                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3150                         propname);
3151                 return -EINVAL;
3152         }
3153
3154         widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3155                                GFP_KERNEL);
3156         if (!widgets) {
3157                 dev_err(card->dev,
3158                         "ASoC: Could not allocate memory for widgets\n");
3159                 return -ENOMEM;
3160         }
3161
3162         for (i = 0; i < num_widgets; i++) {
3163                 ret = of_property_read_string_index(np, propname,
3164                         2 * i, &template);
3165                 if (ret) {
3166                         dev_err(card->dev,
3167                                 "ASoC: Property '%s' index %d read error:%d\n",
3168                                 propname, 2 * i, ret);
3169                         return -EINVAL;
3170                 }
3171
3172                 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3173                         if (!strncmp(template, simple_widgets[j].name,
3174                                      strlen(simple_widgets[j].name))) {
3175                                 widgets[i] = simple_widgets[j];
3176                                 break;
3177                         }
3178                 }
3179
3180                 if (j >= ARRAY_SIZE(simple_widgets)) {
3181                         dev_err(card->dev,
3182                                 "ASoC: DAPM widget '%s' is not supported\n",
3183                                 template);
3184                         return -EINVAL;
3185                 }
3186
3187                 ret = of_property_read_string_index(np, propname,
3188                                                     (2 * i) + 1,
3189                                                     &wname);
3190                 if (ret) {
3191                         dev_err(card->dev,
3192                                 "ASoC: Property '%s' index %d read error:%d\n",
3193                                 propname, (2 * i) + 1, ret);
3194                         return -EINVAL;
3195                 }
3196
3197                 widgets[i].name = wname;
3198         }
3199
3200         card->dapm_widgets = widgets;
3201         card->num_dapm_widgets = num_widgets;
3202
3203         return 0;
3204 }
3205 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3206
3207 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3208                               unsigned int *slots,
3209                               unsigned int *slot_width)
3210 {
3211         u32 val;
3212         int ret;
3213
3214         if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3215                 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3216                 if (ret)
3217                         return ret;
3218
3219                 if (slots)
3220                         *slots = val;
3221         }
3222
3223         if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3224                 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3225                 if (ret)
3226                         return ret;
3227
3228                 if (slot_width)
3229                         *slot_width = val;
3230         }
3231
3232         return 0;
3233 }
3234 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3235
3236 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3237                                    const char *propname)
3238 {
3239         struct device_node *np = card->dev->of_node;
3240         int num_routes;
3241         struct snd_soc_dapm_route *routes;
3242         int i, ret;
3243
3244         num_routes = of_property_count_strings(np, propname);
3245         if (num_routes < 0 || num_routes & 1) {
3246                 dev_err(card->dev,
3247                         "ASoC: Property '%s' does not exist or its length is not even\n",
3248                         propname);
3249                 return -EINVAL;
3250         }
3251         num_routes /= 2;
3252         if (!num_routes) {
3253                 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3254                         propname);
3255                 return -EINVAL;
3256         }
3257
3258         routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3259                               GFP_KERNEL);
3260         if (!routes) {
3261                 dev_err(card->dev,
3262                         "ASoC: Could not allocate DAPM route table\n");
3263                 return -EINVAL;
3264         }
3265
3266         for (i = 0; i < num_routes; i++) {
3267                 ret = of_property_read_string_index(np, propname,
3268                         2 * i, &routes[i].sink);
3269                 if (ret) {
3270                         dev_err(card->dev,
3271                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3272                                 propname, 2 * i, ret);
3273                         return -EINVAL;
3274                 }
3275                 ret = of_property_read_string_index(np, propname,
3276                         (2 * i) + 1, &routes[i].source);
3277                 if (ret) {
3278                         dev_err(card->dev,
3279                                 "ASoC: Property '%s' index %d could not be read: %d\n",
3280                                 propname, (2 * i) + 1, ret);
3281                         return -EINVAL;
3282                 }
3283         }
3284
3285         card->num_dapm_routes = num_routes;
3286         card->dapm_routes = routes;
3287
3288         return 0;
3289 }
3290 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3291
3292 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3293                                      const char *prefix,
3294                                      struct device_node **bitclkmaster,
3295                                      struct device_node **framemaster)
3296 {
3297         int ret, i;
3298         char prop[128];
3299         unsigned int format = 0;
3300         int bit, frame;
3301         const char *str;
3302         struct {
3303                 char *name;
3304                 unsigned int val;
3305         } of_fmt_table[] = {
3306                 { "i2s",        SND_SOC_DAIFMT_I2S },
3307                 { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
3308                 { "left_j",     SND_SOC_DAIFMT_LEFT_J },
3309                 { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
3310                 { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
3311                 { "ac97",       SND_SOC_DAIFMT_AC97 },
3312                 { "pdm",        SND_SOC_DAIFMT_PDM},
3313                 { "msb",        SND_SOC_DAIFMT_MSB },
3314                 { "lsb",        SND_SOC_DAIFMT_LSB },
3315         };
3316
3317         if (!prefix)
3318                 prefix = "";
3319
3320         /*
3321          * check "[prefix]format = xxx"
3322          * SND_SOC_DAIFMT_FORMAT_MASK area
3323          */
3324         snprintf(prop, sizeof(prop), "%sformat", prefix);
3325         ret = of_property_read_string(np, prop, &str);
3326         if (ret == 0) {
3327                 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3328                         if (strcmp(str, of_fmt_table[i].name) == 0) {
3329                                 format |= of_fmt_table[i].val;
3330                                 break;
3331                         }
3332                 }
3333         }
3334
3335         /*
3336          * check "[prefix]continuous-clock"
3337          * SND_SOC_DAIFMT_CLOCK_MASK area
3338          */
3339         snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3340         if (of_get_property(np, prop, NULL))
3341                 format |= SND_SOC_DAIFMT_CONT;
3342         else
3343                 format |= SND_SOC_DAIFMT_GATED;
3344
3345         /*
3346          * check "[prefix]bitclock-inversion"
3347          * check "[prefix]frame-inversion"
3348          * SND_SOC_DAIFMT_INV_MASK area
3349          */
3350         snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3351         bit = !!of_get_property(np, prop, NULL);
3352
3353         snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3354         frame = !!of_get_property(np, prop, NULL);
3355
3356         switch ((bit << 4) + frame) {
3357         case 0x11:
3358                 format |= SND_SOC_DAIFMT_IB_IF;
3359                 break;
3360         case 0x10:
3361                 format |= SND_SOC_DAIFMT_IB_NF;
3362                 break;
3363         case 0x01:
3364                 format |= SND_SOC_DAIFMT_NB_IF;
3365                 break;
3366         default:
3367                 /* SND_SOC_DAIFMT_NB_NF is default */
3368                 break;
3369         }
3370
3371         /*
3372          * check "[prefix]bitclock-master"
3373          * check "[prefix]frame-master"
3374          * SND_SOC_DAIFMT_MASTER_MASK area
3375          */
3376         snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3377         bit = !!of_get_property(np, prop, NULL);
3378         if (bit && bitclkmaster)
3379                 *bitclkmaster = of_parse_phandle(np, prop, 0);
3380
3381         snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3382         frame = !!of_get_property(np, prop, NULL);
3383         if (frame && framemaster)
3384                 *framemaster = of_parse_phandle(np, prop, 0);
3385
3386         switch ((bit << 4) + frame) {
3387         case 0x11:
3388                 format |= SND_SOC_DAIFMT_CBM_CFM;
3389                 break;
3390         case 0x10:
3391                 format |= SND_SOC_DAIFMT_CBM_CFS;
3392                 break;
3393         case 0x01:
3394                 format |= SND_SOC_DAIFMT_CBS_CFM;
3395                 break;
3396         default:
3397                 format |= SND_SOC_DAIFMT_CBS_CFS;
3398                 break;
3399         }
3400
3401         return format;
3402 }
3403 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3404
3405 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3406                                 const char **dai_name)
3407 {
3408         struct snd_soc_component *pos;
3409         int ret = -EPROBE_DEFER;
3410
3411         mutex_lock(&client_mutex);
3412         list_for_each_entry(pos, &component_list, list) {
3413                 if (pos->dev->of_node != args->np)
3414                         continue;
3415
3416                 if (pos->driver->of_xlate_dai_name) {
3417                         ret = pos->driver->of_xlate_dai_name(pos,
3418                                                              args,
3419                                                              dai_name);
3420                 } else {
3421                         int id = -1;
3422
3423                         switch (args->args_count) {
3424                         case 0:
3425                                 id = 0; /* same as dai_drv[0] */
3426                                 break;
3427                         case 1:
3428                                 id = args->args[0];
3429                                 break;
3430                         default:
3431                                 /* not supported */
3432                                 break;
3433                         }
3434
3435                         if (id < 0 || id >= pos->num_dai) {
3436                                 ret = -EINVAL;
3437                                 continue;
3438                         }
3439
3440                         ret = 0;
3441
3442                         *dai_name = pos->dai_drv[id].name;
3443                         if (!*dai_name)
3444                                 *dai_name = pos->name;
3445                 }
3446
3447                 break;
3448         }
3449         mutex_unlock(&client_mutex);
3450         return ret;
3451 }
3452
3453 int snd_soc_of_get_dai_name(struct device_node *of_node,
3454                             const char **dai_name)
3455 {
3456         struct of_phandle_args args;
3457         int ret;
3458
3459         ret = of_parse_phandle_with_args(of_node, "sound-dai",
3460                                          "#sound-dai-cells", 0, &args);
3461         if (ret)
3462                 return ret;
3463
3464         ret = snd_soc_get_dai_name(&args, dai_name);
3465
3466         of_node_put(args.np);
3467
3468         return ret;
3469 }
3470 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3471
3472 /*
3473  * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3474  * @dev: Card device
3475  * @of_node: Device node
3476  * @dai_link: DAI link
3477  *
3478  * Builds an array of CODEC DAI components from the DAI link property
3479  * 'sound-dai'.
3480  * The array is set in the DAI link and the number of DAIs is set accordingly.
3481  * The device nodes in the array (of_node) must be dereferenced by the caller.
3482  *
3483  * Returns 0 for success
3484  */
3485 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3486                                    struct device_node *of_node,
3487                                    struct snd_soc_dai_link *dai_link)
3488 {
3489         struct of_phandle_args args;
3490         struct snd_soc_dai_link_component *component;
3491         char *name;
3492         int index, num_codecs, ret;
3493
3494         /* Count the number of CODECs */
3495         name = "sound-dai";
3496         num_codecs = of_count_phandle_with_args(of_node, name,
3497                                                 "#sound-dai-cells");
3498         if (num_codecs <= 0) {
3499                 if (num_codecs == -ENOENT)
3500                         dev_err(dev, "No 'sound-dai' property\n");
3501                 else
3502                         dev_err(dev, "Bad phandle in 'sound-dai'\n");
3503                 return num_codecs;
3504         }
3505         component = devm_kzalloc(dev,
3506                                  sizeof *component * num_codecs,
3507                                  GFP_KERNEL);
3508         if (!component)
3509                 return -ENOMEM;
3510         dai_link->codecs = component;
3511         dai_link->num_codecs = num_codecs;
3512
3513         /* Parse the list */
3514         for (index = 0, component = dai_link->codecs;
3515              index < dai_link->num_codecs;
3516              index++, component++) {
3517                 ret = of_parse_phandle_with_args(of_node, name,
3518                                                  "#sound-dai-cells",
3519                                                   index, &args);
3520                 if (ret)
3521                         goto err;
3522                 component->of_node = args.np;
3523                 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3524                 if (ret < 0)
3525                         goto err;
3526         }
3527         return 0;
3528 err:
3529         for (index = 0, component = dai_link->codecs;
3530              index < dai_link->num_codecs;
3531              index++, component++) {
3532                 if (!component->of_node)
3533                         break;
3534                 of_node_put(component->of_node);
3535                 component->of_node = NULL;
3536         }
3537         dai_link->codecs = NULL;
3538         dai_link->num_codecs = 0;
3539         return ret;
3540 }
3541 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3542
3543 static int __init snd_soc_init(void)
3544 {
3545 #ifdef CONFIG_DEBUG_FS
3546         snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3547         if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3548                 pr_warn("ASoC: Failed to create debugfs directory\n");
3549                 snd_soc_debugfs_root = NULL;
3550         }
3551
3552         if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3553                                  &codec_list_fops))
3554                 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3555
3556         if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3557                                  &dai_list_fops))
3558                 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3559
3560         if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3561                                  &platform_list_fops))
3562                 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3563 #endif
3564
3565         snd_soc_util_init();
3566
3567         return platform_driver_register(&soc_driver);
3568 }
3569 module_init(snd_soc_init);
3570
3571 static void __exit snd_soc_exit(void)
3572 {
3573         snd_soc_util_exit();
3574
3575 #ifdef CONFIG_DEBUG_FS
3576         debugfs_remove_recursive(snd_soc_debugfs_root);
3577 #endif
3578         platform_driver_unregister(&soc_driver);
3579 }
3580 module_exit(snd_soc_exit);
3581
3582 /* Module information */
3583 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3584 MODULE_DESCRIPTION("ALSA SoC Core");
3585 MODULE_LICENSE("GPL");
3586 MODULE_ALIAS("platform:soc-audio");