linux/sound/soc/soc-core.c
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   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/ctype.h>
  34#include <linux/slab.h>
  35#include <linux/of.h>
  36#include <sound/ac97_codec.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
  50static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
  51
  52#ifdef CONFIG_DEBUG_FS
  53struct dentry *snd_soc_debugfs_root;
  54EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
  55#endif
  56
  57static DEFINE_MUTEX(client_mutex);
  58static LIST_HEAD(dai_list);
  59static LIST_HEAD(platform_list);
  60static LIST_HEAD(codec_list);
  61static LIST_HEAD(component_list);
  62
  63/*
  64 * This is a timeout to do a DAPM powerdown after a stream is closed().
  65 * It can be used to eliminate pops between different playback streams, e.g.
  66 * between two audio tracks.
  67 */
  68static int pmdown_time = 5000;
  69module_param(pmdown_time, int, 0);
  70MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
  71
  72/* returns the minimum number of bytes needed to represent
  73 * a particular given value */
  74static int min_bytes_needed(unsigned long val)
  75{
  76        int c = 0;
  77        int i;
  78
  79        for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
  80                if (val & (1UL << i))
  81                        break;
  82        c = (sizeof val * 8) - c;
  83        if (!c || (c % 8))
  84                c = (c + 8) / 8;
  85        else
  86                c /= 8;
  87        return c;
  88}
  89
  90/* fill buf which is 'len' bytes with a formatted
  91 * string of the form 'reg: value\n' */
  92static int format_register_str(struct snd_soc_codec *codec,
  93                               unsigned int reg, char *buf, size_t len)
  94{
  95        int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
  96        int regsize = codec->driver->reg_word_size * 2;
  97        int ret;
  98        char tmpbuf[len + 1];
  99        char regbuf[regsize + 1];
 100
 101        /* since tmpbuf is allocated on the stack, warn the callers if they
 102         * try to abuse this function */
 103        WARN_ON(len > 63);
 104
 105        /* +2 for ': ' and + 1 for '\n' */
 106        if (wordsize + regsize + 2 + 1 != len)
 107                return -EINVAL;
 108
 109        ret = snd_soc_read(codec, reg);
 110        if (ret < 0) {
 111                memset(regbuf, 'X', regsize);
 112                regbuf[regsize] = '\0';
 113        } else {
 114                snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
 115        }
 116
 117        /* prepare the buffer */
 118        snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
 119        /* copy it back to the caller without the '\0' */
 120        memcpy(buf, tmpbuf, len);
 121
 122        return 0;
 123}
 124
 125/* codec register dump */
 126static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
 127                                  size_t count, loff_t pos)
 128{
 129        int i, step = 1;
 130        int wordsize, regsize;
 131        int len;
 132        size_t total = 0;
 133        loff_t p = 0;
 134
 135        wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
 136        regsize = codec->driver->reg_word_size * 2;
 137
 138        len = wordsize + regsize + 2 + 1;
 139
 140        if (!codec->driver->reg_cache_size)
 141                return 0;
 142
 143        if (codec->driver->reg_cache_step)
 144                step = codec->driver->reg_cache_step;
 145
 146        for (i = 0; i < codec->driver->reg_cache_size; i += step) {
 147                if (!snd_soc_codec_readable_register(codec, i))
 148                        continue;
 149                if (codec->driver->display_register) {
 150                        count += codec->driver->display_register(codec, buf + count,
 151                                                         PAGE_SIZE - count, i);
 152                } else {
 153                        /* only support larger than PAGE_SIZE bytes debugfs
 154                         * entries for the default case */
 155                        if (p >= pos) {
 156                                if (total + len >= count - 1)
 157                                        break;
 158                                format_register_str(codec, i, buf + total, len);
 159                                total += len;
 160                        }
 161                        p += len;
 162                }
 163        }
 164
 165        total = min(total, count - 1);
 166
 167        return total;
 168}
 169
 170static ssize_t codec_reg_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 soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
 176}
 177
 178static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
 179
 180static ssize_t pmdown_time_show(struct device *dev,
 181                                struct device_attribute *attr, char *buf)
 182{
 183        struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 184
 185        return sprintf(buf, "%ld\n", rtd->pmdown_time);
 186}
 187
 188static ssize_t pmdown_time_set(struct device *dev,
 189                               struct device_attribute *attr,
 190                               const char *buf, size_t count)
 191{
 192        struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 193        int ret;
 194
 195        ret = strict_strtol(buf, 10, &rtd->pmdown_time);
 196        if (ret)
 197                return ret;
 198
 199        return count;
 200}
 201
 202static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
 203
 204#ifdef CONFIG_DEBUG_FS
 205static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 206                                   size_t count, loff_t *ppos)
 207{
 208        ssize_t ret;
 209        struct snd_soc_codec *codec = file->private_data;
 210        char *buf;
 211
 212        if (*ppos < 0 || !count)
 213                return -EINVAL;
 214
 215        buf = kmalloc(count, GFP_KERNEL);
 216        if (!buf)
 217                return -ENOMEM;
 218
 219        ret = soc_codec_reg_show(codec, buf, count, *ppos);
 220        if (ret >= 0) {
 221                if (copy_to_user(user_buf, buf, ret)) {
 222                        kfree(buf);
 223                        return -EFAULT;
 224                }
 225                *ppos += ret;
 226        }
 227
 228        kfree(buf);
 229        return ret;
 230}
 231
 232static ssize_t codec_reg_write_file(struct file *file,
 233                const char __user *user_buf, size_t count, loff_t *ppos)
 234{
 235        char buf[32];
 236        size_t buf_size;
 237        char *start = buf;
 238        unsigned long reg, value;
 239        struct snd_soc_codec *codec = file->private_data;
 240
 241        buf_size = min(count, (sizeof(buf)-1));
 242        if (copy_from_user(buf, user_buf, buf_size))
 243                return -EFAULT;
 244        buf[buf_size] = 0;
 245
 246        while (*start == ' ')
 247                start++;
 248        reg = simple_strtoul(start, &start, 16);
 249        while (*start == ' ')
 250                start++;
 251        if (strict_strtoul(start, 16, &value))
 252                return -EINVAL;
 253
 254        /* Userspace has been fiddling around behind the kernel's back */
 255        add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
 256
 257        snd_soc_write(codec, reg, value);
 258        return buf_size;
 259}
 260
 261static const struct file_operations codec_reg_fops = {
 262        .open = simple_open,
 263        .read = codec_reg_read_file,
 264        .write = codec_reg_write_file,
 265        .llseek = default_llseek,
 266};
 267
 268static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 269{
 270        struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
 271
 272        codec->debugfs_codec_root = debugfs_create_dir(codec->name,
 273                                                       debugfs_card_root);
 274        if (!codec->debugfs_codec_root) {
 275                dev_warn(codec->dev,
 276                        "ASoC: Failed to create codec debugfs directory\n");
 277                return;
 278        }
 279
 280        debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
 281                            &codec->cache_sync);
 282        debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
 283                            &codec->cache_only);
 284
 285        codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 286                                                 codec->debugfs_codec_root,
 287                                                 codec, &codec_reg_fops);
 288        if (!codec->debugfs_reg)
 289                dev_warn(codec->dev,
 290                        "ASoC: Failed to create codec register debugfs file\n");
 291
 292        snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
 293}
 294
 295static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 296{
 297        debugfs_remove_recursive(codec->debugfs_codec_root);
 298}
 299
 300static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
 301{
 302        struct dentry *debugfs_card_root = platform->card->debugfs_card_root;
 303
 304        platform->debugfs_platform_root = debugfs_create_dir(platform->name,
 305                                                       debugfs_card_root);
 306        if (!platform->debugfs_platform_root) {
 307                dev_warn(platform->dev,
 308                        "ASoC: Failed to create platform debugfs directory\n");
 309                return;
 310        }
 311
 312        snd_soc_dapm_debugfs_init(&platform->dapm,
 313                platform->debugfs_platform_root);
 314}
 315
 316static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
 317{
 318        debugfs_remove_recursive(platform->debugfs_platform_root);
 319}
 320
 321static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 322                                    size_t count, loff_t *ppos)
 323{
 324        char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 325        ssize_t len, ret = 0;
 326        struct snd_soc_codec *codec;
 327
 328        if (!buf)
 329                return -ENOMEM;
 330
 331        list_for_each_entry(codec, &codec_list, list) {
 332                len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 333                               codec->name);
 334                if (len >= 0)
 335                        ret += len;
 336                if (ret > PAGE_SIZE) {
 337                        ret = PAGE_SIZE;
 338                        break;
 339                }
 340        }
 341
 342        if (ret >= 0)
 343                ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 344
 345        kfree(buf);
 346
 347        return ret;
 348}
 349
 350static const struct file_operations codec_list_fops = {
 351        .read = codec_list_read_file,
 352        .llseek = default_llseek,/* read accesses f_pos */
 353};
 354
 355static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 356                                  size_t count, loff_t *ppos)
 357{
 358        char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 359        ssize_t len, ret = 0;
 360        struct snd_soc_dai *dai;
 361
 362        if (!buf)
 363                return -ENOMEM;
 364
 365        list_for_each_entry(dai, &dai_list, list) {
 366                len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
 367                if (len >= 0)
 368                        ret += len;
 369                if (ret > PAGE_SIZE) {
 370                        ret = PAGE_SIZE;
 371                        break;
 372                }
 373        }
 374
 375        ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 376
 377        kfree(buf);
 378
 379        return ret;
 380}
 381
 382static const struct file_operations dai_list_fops = {
 383        .read = dai_list_read_file,
 384        .llseek = default_llseek,/* read accesses f_pos */
 385};
 386
 387static ssize_t platform_list_read_file(struct file *file,
 388                                       char __user *user_buf,
 389                                       size_t count, loff_t *ppos)
 390{
 391        char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 392        ssize_t len, ret = 0;
 393        struct snd_soc_platform *platform;
 394
 395        if (!buf)
 396                return -ENOMEM;
 397
 398        list_for_each_entry(platform, &platform_list, list) {
 399                len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 400                               platform->name);
 401                if (len >= 0)
 402                        ret += len;
 403                if (ret > PAGE_SIZE) {
 404                        ret = PAGE_SIZE;
 405                        break;
 406                }
 407        }
 408
 409        ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 410
 411        kfree(buf);
 412
 413        return ret;
 414}
 415
 416static const struct file_operations platform_list_fops = {
 417        .read = platform_list_read_file,
 418        .llseek = default_llseek,/* read accesses f_pos */
 419};
 420
 421static void soc_init_card_debugfs(struct snd_soc_card *card)
 422{
 423        card->debugfs_card_root = debugfs_create_dir(card->name,
 424                                                     snd_soc_debugfs_root);
 425        if (!card->debugfs_card_root) {
 426                dev_warn(card->dev,
 427                         "ASoC: Failed to create card debugfs directory\n");
 428                return;
 429        }
 430
 431        card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 432                                                    card->debugfs_card_root,
 433                                                    &card->pop_time);
 434        if (!card->debugfs_pop_time)
 435                dev_warn(card->dev,
 436                       "ASoC: Failed to create pop time debugfs file\n");
 437}
 438
 439static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 440{
 441        debugfs_remove_recursive(card->debugfs_card_root);
 442}
 443
 444#else
 445
 446static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 447{
 448}
 449
 450static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 451{
 452}
 453
 454static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform)
 455{
 456}
 457
 458static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
 459{
 460}
 461
 462static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 463{
 464}
 465
 466static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 467{
 468}
 469#endif
 470
 471struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
 472                const char *dai_link, int stream)
 473{
 474        int i;
 475
 476        for (i = 0; i < card->num_links; i++) {
 477                if (card->rtd[i].dai_link->no_pcm &&
 478                        !strcmp(card->rtd[i].dai_link->name, dai_link))
 479                        return card->rtd[i].pcm->streams[stream].substream;
 480        }
 481        dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
 482        return NULL;
 483}
 484EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
 485
 486struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
 487                const char *dai_link)
 488{
 489        int i;
 490
 491        for (i = 0; i < card->num_links; i++) {
 492                if (!strcmp(card->rtd[i].dai_link->name, dai_link))
 493                        return &card->rtd[i];
 494        }
 495        dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
 496        return NULL;
 497}
 498EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
 499
 500#ifdef CONFIG_SND_SOC_AC97_BUS
 501/* unregister ac97 codec */
 502static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
 503{
 504        if (codec->ac97->dev.bus)
 505                device_unregister(&codec->ac97->dev);
 506        return 0;
 507}
 508
 509/* stop no dev release warning */
 510static void soc_ac97_device_release(struct device *dev){}
 511
 512/* register ac97 codec to bus */
 513static int soc_ac97_dev_register(struct snd_soc_codec *codec)
 514{
 515        int err;
 516
 517        codec->ac97->dev.bus = &ac97_bus_type;
 518        codec->ac97->dev.parent = codec->card->dev;
 519        codec->ac97->dev.release = soc_ac97_device_release;
 520
 521        dev_set_name(&codec->ac97->dev, "%d-%d:%s",
 522                     codec->card->snd_card->number, 0, codec->name);
 523        err = device_register(&codec->ac97->dev);
 524        if (err < 0) {
 525                dev_err(codec->dev, "ASoC: Can't register ac97 bus\n");
 526                codec->ac97->dev.bus = NULL;
 527                return err;
 528        }
 529        return 0;
 530}
 531#endif
 532
 533#ifdef CONFIG_PM_SLEEP
 534/* powers down audio subsystem for suspend */
 535int snd_soc_suspend(struct device *dev)
 536{
 537        struct snd_soc_card *card = dev_get_drvdata(dev);
 538        struct snd_soc_codec *codec;
 539        int i;
 540
 541        /* If the initialization of this soc device failed, there is no codec
 542         * associated with it. Just bail out in this case.
 543         */
 544        if (list_empty(&card->codec_dev_list))
 545                return 0;
 546
 547        /* Due to the resume being scheduled into a workqueue we could
 548        * suspend before that's finished - wait for it to complete.
 549         */
 550        snd_power_lock(card->snd_card);
 551        snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
 552        snd_power_unlock(card->snd_card);
 553
 554        /* we're going to block userspace touching us until resume completes */
 555        snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
 556
 557        /* mute any active DACs */
 558        for (i = 0; i < card->num_rtd; i++) {
 559                struct snd_soc_dai *dai = card->rtd[i].codec_dai;
 560                struct snd_soc_dai_driver *drv = dai->driver;
 561
 562                if (card->rtd[i].dai_link->ignore_suspend)
 563                        continue;
 564
 565                if (drv->ops->digital_mute && dai->playback_active)
 566                        drv->ops->digital_mute(dai, 1);
 567        }
 568
 569        /* suspend all pcms */
 570        for (i = 0; i < card->num_rtd; i++) {
 571                if (card->rtd[i].dai_link->ignore_suspend)
 572                        continue;
 573
 574                snd_pcm_suspend_all(card->rtd[i].pcm);
 575        }
 576
 577        if (card->suspend_pre)
 578                card->suspend_pre(card);
 579
 580        for (i = 0; i < card->num_rtd; i++) {
 581                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 582                struct snd_soc_platform *platform = card->rtd[i].platform;
 583
 584                if (card->rtd[i].dai_link->ignore_suspend)
 585                        continue;
 586
 587                if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
 588                        cpu_dai->driver->suspend(cpu_dai);
 589                if (platform->driver->suspend && !platform->suspended) {
 590                        platform->driver->suspend(cpu_dai);
 591                        platform->suspended = 1;
 592                }
 593        }
 594
 595        /* close any waiting streams and save state */
 596        for (i = 0; i < card->num_rtd; i++) {
 597                flush_delayed_work(&card->rtd[i].delayed_work);
 598                card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
 599        }
 600
 601        for (i = 0; i < card->num_rtd; i++) {
 602
 603                if (card->rtd[i].dai_link->ignore_suspend)
 604                        continue;
 605
 606                snd_soc_dapm_stream_event(&card->rtd[i],
 607                                          SNDRV_PCM_STREAM_PLAYBACK,
 608                                          SND_SOC_DAPM_STREAM_SUSPEND);
 609
 610                snd_soc_dapm_stream_event(&card->rtd[i],
 611                                          SNDRV_PCM_STREAM_CAPTURE,
 612                                          SND_SOC_DAPM_STREAM_SUSPEND);
 613        }
 614
 615        /* Recheck all analogue paths too */
 616        dapm_mark_io_dirty(&card->dapm);
 617        snd_soc_dapm_sync(&card->dapm);
 618
 619        /* suspend all CODECs */
 620        list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 621                /* If there are paths active then the CODEC will be held with
 622                 * bias _ON and should not be suspended. */
 623                if (!codec->suspended && codec->driver->suspend) {
 624                        switch (codec->dapm.bias_level) {
 625                        case SND_SOC_BIAS_STANDBY:
 626                                /*
 627                                 * If the CODEC is capable of idle
 628                                 * bias off then being in STANDBY
 629                                 * means it's doing something,
 630                                 * otherwise fall through.
 631                                 */
 632                                if (codec->dapm.idle_bias_off) {
 633                                        dev_dbg(codec->dev,
 634                                                "ASoC: idle_bias_off CODEC on over suspend\n");
 635                                        break;
 636                                }
 637                        case SND_SOC_BIAS_OFF:
 638                                codec->driver->suspend(codec);
 639                                codec->suspended = 1;
 640                                codec->cache_sync = 1;
 641                                if (codec->using_regmap)
 642                                        regcache_mark_dirty(codec->control_data);
 643                                break;
 644                        default:
 645                                dev_dbg(codec->dev,
 646                                        "ASoC: CODEC is on over suspend\n");
 647                                break;
 648                        }
 649                }
 650        }
 651
 652        for (i = 0; i < card->num_rtd; i++) {
 653                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 654
 655                if (card->rtd[i].dai_link->ignore_suspend)
 656                        continue;
 657
 658                if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
 659                        cpu_dai->driver->suspend(cpu_dai);
 660        }
 661
 662        if (card->suspend_post)
 663                card->suspend_post(card);
 664
 665        return 0;
 666}
 667EXPORT_SYMBOL_GPL(snd_soc_suspend);
 668
 669/* deferred resume work, so resume can complete before we finished
 670 * setting our codec back up, which can be very slow on I2C
 671 */
 672static void soc_resume_deferred(struct work_struct *work)
 673{
 674        struct snd_soc_card *card =
 675                        container_of(work, struct snd_soc_card, deferred_resume_work);
 676        struct snd_soc_codec *codec;
 677        int i;
 678
 679        /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
 680         * so userspace apps are blocked from touching us
 681         */
 682
 683        dev_dbg(card->dev, "ASoC: starting resume work\n");
 684
 685        /* Bring us up into D2 so that DAPM starts enabling things */
 686        snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
 687
 688        if (card->resume_pre)
 689                card->resume_pre(card);
 690
 691        /* resume AC97 DAIs */
 692        for (i = 0; i < card->num_rtd; i++) {
 693                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 694
 695                if (card->rtd[i].dai_link->ignore_suspend)
 696                        continue;
 697
 698                if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
 699                        cpu_dai->driver->resume(cpu_dai);
 700        }
 701
 702        list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 703                /* If the CODEC was idle over suspend then it will have been
 704                 * left with bias OFF or STANDBY and suspended so we must now
 705                 * resume.  Otherwise the suspend was suppressed.
 706                 */
 707                if (codec->driver->resume && codec->suspended) {
 708                        switch (codec->dapm.bias_level) {
 709                        case SND_SOC_BIAS_STANDBY:
 710                        case SND_SOC_BIAS_OFF:
 711                                codec->driver->resume(codec);
 712                                codec->suspended = 0;
 713                                break;
 714                        default:
 715                                dev_dbg(codec->dev,
 716                                        "ASoC: CODEC was on over suspend\n");
 717                                break;
 718                        }
 719                }
 720        }
 721
 722        for (i = 0; i < card->num_rtd; i++) {
 723
 724                if (card->rtd[i].dai_link->ignore_suspend)
 725                        continue;
 726
 727                snd_soc_dapm_stream_event(&card->rtd[i],
 728                                          SNDRV_PCM_STREAM_PLAYBACK,
 729                                          SND_SOC_DAPM_STREAM_RESUME);
 730
 731                snd_soc_dapm_stream_event(&card->rtd[i],
 732                                          SNDRV_PCM_STREAM_CAPTURE,
 733                                          SND_SOC_DAPM_STREAM_RESUME);
 734        }
 735
 736        /* unmute any active DACs */
 737        for (i = 0; i < card->num_rtd; i++) {
 738                struct snd_soc_dai *dai = card->rtd[i].codec_dai;
 739                struct snd_soc_dai_driver *drv = dai->driver;
 740
 741                if (card->rtd[i].dai_link->ignore_suspend)
 742                        continue;
 743
 744                if (drv->ops->digital_mute && dai->playback_active)
 745                        drv->ops->digital_mute(dai, 0);
 746        }
 747
 748        for (i = 0; i < card->num_rtd; i++) {
 749                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 750                struct snd_soc_platform *platform = card->rtd[i].platform;
 751
 752                if (card->rtd[i].dai_link->ignore_suspend)
 753                        continue;
 754
 755                if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
 756                        cpu_dai->driver->resume(cpu_dai);
 757                if (platform->driver->resume && platform->suspended) {
 758                        platform->driver->resume(cpu_dai);
 759                        platform->suspended = 0;
 760                }
 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 analogue paths too */
 772        dapm_mark_io_dirty(&card->dapm);
 773        snd_soc_dapm_sync(&card->dapm);
 774}
 775
 776/* powers up audio subsystem after a suspend */
 777int snd_soc_resume(struct device *dev)
 778{
 779        struct snd_soc_card *card = dev_get_drvdata(dev);
 780        int i, ac97_control = 0;
 781
 782        /* If the initialization of this soc device failed, there is no codec
 783         * associated with it. Just bail out in this case.
 784         */
 785        if (list_empty(&card->codec_dev_list))
 786                return 0;
 787
 788        /* AC97 devices might have other drivers hanging off them so
 789         * need to resume immediately.  Other drivers don't have that
 790         * problem and may take a substantial amount of time to resume
 791         * due to I/O costs and anti-pop so handle them out of line.
 792         */
 793        for (i = 0; i < card->num_rtd; i++) {
 794                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 795                ac97_control |= cpu_dai->driver->ac97_control;
 796        }
 797        if (ac97_control) {
 798                dev_dbg(dev, "ASoC: Resuming AC97 immediately\n");
 799                soc_resume_deferred(&card->deferred_resume_work);
 800        } else {
 801                dev_dbg(dev, "ASoC: Scheduling resume work\n");
 802                if (!schedule_work(&card->deferred_resume_work))
 803                        dev_err(dev, "ASoC: resume work item may be lost\n");
 804        }
 805
 806        return 0;
 807}
 808EXPORT_SYMBOL_GPL(snd_soc_resume);
 809#else
 810#define snd_soc_suspend NULL
 811#define snd_soc_resume NULL
 812#endif
 813
 814static const struct snd_soc_dai_ops null_dai_ops = {
 815};
 816
 817static int soc_bind_dai_link(struct snd_soc_card *card, int num)
 818{
 819        struct snd_soc_dai_link *dai_link = &card->dai_link[num];
 820        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 821        struct snd_soc_codec *codec;
 822        struct snd_soc_platform *platform;
 823        struct snd_soc_dai *codec_dai, *cpu_dai;
 824        const char *platform_name;
 825
 826        dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
 827
 828        /* Find CPU DAI from registered DAIs*/
 829        list_for_each_entry(cpu_dai, &dai_list, list) {
 830                if (dai_link->cpu_of_node &&
 831                    (cpu_dai->dev->of_node != dai_link->cpu_of_node))
 832                        continue;
 833                if (dai_link->cpu_name &&
 834                    strcmp(dev_name(cpu_dai->dev), dai_link->cpu_name))
 835                        continue;
 836                if (dai_link->cpu_dai_name &&
 837                    strcmp(cpu_dai->name, dai_link->cpu_dai_name))
 838                        continue;
 839
 840                rtd->cpu_dai = cpu_dai;
 841        }
 842
 843        if (!rtd->cpu_dai) {
 844                dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
 845                        dai_link->cpu_dai_name);
 846                return -EPROBE_DEFER;
 847        }
 848
 849        /* Find CODEC from registered CODECs */
 850        list_for_each_entry(codec, &codec_list, list) {
 851                if (dai_link->codec_of_node) {
 852                        if (codec->dev->of_node != dai_link->codec_of_node)
 853                                continue;
 854                } else {
 855                        if (strcmp(codec->name, dai_link->codec_name))
 856                                continue;
 857                }
 858
 859                rtd->codec = codec;
 860
 861                /*
 862                 * CODEC found, so find CODEC DAI from registered DAIs from
 863                 * this CODEC
 864                 */
 865                list_for_each_entry(codec_dai, &dai_list, list) {
 866                        if (codec->dev == codec_dai->dev &&
 867                                !strcmp(codec_dai->name,
 868                                        dai_link->codec_dai_name)) {
 869
 870                                rtd->codec_dai = codec_dai;
 871                        }
 872                }
 873
 874                if (!rtd->codec_dai) {
 875                        dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
 876                                dai_link->codec_dai_name);
 877                        return -EPROBE_DEFER;
 878                }
 879        }
 880
 881        if (!rtd->codec) {
 882                dev_err(card->dev, "ASoC: CODEC %s not registered\n",
 883                        dai_link->codec_name);
 884                return -EPROBE_DEFER;
 885        }
 886
 887        /* if there's no platform we match on the empty platform */
 888        platform_name = dai_link->platform_name;
 889        if (!platform_name && !dai_link->platform_of_node)
 890                platform_name = "snd-soc-dummy";
 891
 892        /* find one from the set of registered platforms */
 893        list_for_each_entry(platform, &platform_list, list) {
 894                if (dai_link->platform_of_node) {
 895                        if (platform->dev->of_node !=
 896                            dai_link->platform_of_node)
 897                                continue;
 898                } else {
 899                        if (strcmp(platform->name, platform_name))
 900                                continue;
 901                }
 902
 903                rtd->platform = platform;
 904        }
 905        if (!rtd->platform) {
 906                dev_err(card->dev, "ASoC: platform %s not registered\n",
 907                        dai_link->platform_name);
 908                return -EPROBE_DEFER;
 909        }
 910
 911        card->num_rtd++;
 912
 913        return 0;
 914}
 915
 916static int soc_remove_platform(struct snd_soc_platform *platform)
 917{
 918        int ret;
 919
 920        if (platform->driver->remove) {
 921                ret = platform->driver->remove(platform);
 922                if (ret < 0)
 923                        dev_err(platform->dev, "ASoC: failed to remove %d\n",
 924                                ret);
 925        }
 926
 927        /* Make sure all DAPM widgets are freed */
 928        snd_soc_dapm_free(&platform->dapm);
 929
 930        soc_cleanup_platform_debugfs(platform);
 931        platform->probed = 0;
 932        list_del(&platform->card_list);
 933        module_put(platform->dev->driver->owner);
 934
 935        return 0;
 936}
 937
 938static void soc_remove_codec(struct snd_soc_codec *codec)
 939{
 940        int err;
 941
 942        if (codec->driver->remove) {
 943                err = codec->driver->remove(codec);
 944                if (err < 0)
 945                        dev_err(codec->dev, "ASoC: failed to remove %d\n", err);
 946        }
 947
 948        /* Make sure all DAPM widgets are freed */
 949        snd_soc_dapm_free(&codec->dapm);
 950
 951        soc_cleanup_codec_debugfs(codec);
 952        codec->probed = 0;
 953        list_del(&codec->card_list);
 954        module_put(codec->dev->driver->owner);
 955}
 956
 957static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
 958{
 959        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 960        struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
 961        int err;
 962
 963        /* unregister the rtd device */
 964        if (rtd->dev_registered) {
 965                device_remove_file(rtd->dev, &dev_attr_pmdown_time);
 966                device_remove_file(rtd->dev, &dev_attr_codec_reg);
 967                device_unregister(rtd->dev);
 968                rtd->dev_registered = 0;
 969        }
 970
 971        /* remove the CODEC DAI */
 972        if (codec_dai && codec_dai->probed &&
 973                        codec_dai->driver->remove_order == order) {
 974                if (codec_dai->driver->remove) {
 975                        err = codec_dai->driver->remove(codec_dai);
 976                        if (err < 0)
 977                                dev_err(codec_dai->dev,
 978                                        "ASoC: failed to remove %s: %d\n",
 979                                        codec_dai->name, err);
 980                }
 981                codec_dai->probed = 0;
 982                list_del(&codec_dai->card_list);
 983        }
 984
 985        /* remove the cpu_dai */
 986        if (cpu_dai && cpu_dai->probed &&
 987                        cpu_dai->driver->remove_order == order) {
 988                if (cpu_dai->driver->remove) {
 989                        err = cpu_dai->driver->remove(cpu_dai);
 990                        if (err < 0)
 991                                dev_err(cpu_dai->dev,
 992                                        "ASoC: failed to remove %s: %d\n",
 993                                        cpu_dai->name, err);
 994                }
 995                cpu_dai->probed = 0;
 996                list_del(&cpu_dai->card_list);
 997
 998                if (!cpu_dai->codec) {
 999                        snd_soc_dapm_free(&cpu_dai->dapm);
1000                        module_put(cpu_dai->dev->driver->owner);
1001                }
1002        }
1003}
1004
1005static void soc_remove_link_components(struct snd_soc_card *card, int num,
1006                                       int order)
1007{
1008        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1009        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1010        struct snd_soc_dai *codec_dai = rtd->codec_dai;
1011        struct snd_soc_platform *platform = rtd->platform;
1012        struct snd_soc_codec *codec;
1013
1014        /* remove the platform */
1015        if (platform && platform->probed &&
1016            platform->driver->remove_order == order) {
1017                soc_remove_platform(platform);
1018        }
1019
1020        /* remove the CODEC-side CODEC */
1021        if (codec_dai) {
1022                codec = codec_dai->codec;
1023                if (codec && codec->probed &&
1024                    codec->driver->remove_order == order)
1025                        soc_remove_codec(codec);
1026        }
1027
1028        /* remove any CPU-side CODEC */
1029        if (cpu_dai) {
1030                codec = cpu_dai->codec;
1031                if (codec && codec->probed &&
1032                    codec->driver->remove_order == order)
1033                        soc_remove_codec(codec);
1034        }
1035}
1036
1037static void soc_remove_dai_links(struct snd_soc_card *card)
1038{
1039        int dai, order;
1040
1041        for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1042                        order++) {
1043                for (dai = 0; dai < card->num_rtd; dai++)
1044                        soc_remove_link_dais(card, dai, order);
1045        }
1046
1047        for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1048                        order++) {
1049                for (dai = 0; dai < card->num_rtd; dai++)
1050                        soc_remove_link_components(card, dai, order);
1051        }
1052
1053        card->num_rtd = 0;
1054}
1055
1056static void soc_set_name_prefix(struct snd_soc_card *card,
1057                                struct snd_soc_codec *codec)
1058{
1059        int i;
1060
1061        if (card->codec_conf == NULL)
1062                return;
1063
1064        for (i = 0; i < card->num_configs; i++) {
1065                struct snd_soc_codec_conf *map = &card->codec_conf[i];
1066                if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1067                        codec->name_prefix = map->name_prefix;
1068                        break;
1069                }
1070        }
1071}
1072
1073static int soc_probe_codec(struct snd_soc_card *card,
1074                           struct snd_soc_codec *codec)
1075{
1076        int ret = 0;
1077        const struct snd_soc_codec_driver *driver = codec->driver;
1078        struct snd_soc_dai *dai;
1079
1080        codec->card = card;
1081        codec->dapm.card = card;
1082        soc_set_name_prefix(card, codec);
1083
1084        if (!try_module_get(codec->dev->driver->owner))
1085                return -ENODEV;
1086
1087        soc_init_codec_debugfs(codec);
1088
1089        if (driver->dapm_widgets)
1090                snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1091                                          driver->num_dapm_widgets);
1092
1093        /* Create DAPM widgets for each DAI stream */
1094        list_for_each_entry(dai, &dai_list, list) {
1095                if (dai->dev != codec->dev)
1096                        continue;
1097
1098                snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
1099        }
1100
1101        codec->dapm.idle_bias_off = driver->idle_bias_off;
1102
1103        if (driver->probe) {
1104                ret = driver->probe(codec);
1105                if (ret < 0) {
1106                        dev_err(codec->dev,
1107                                "ASoC: failed to probe CODEC %d\n", ret);
1108                        goto err_probe;
1109                }
1110                WARN(codec->dapm.idle_bias_off &&
1111                        codec->dapm.bias_level != SND_SOC_BIAS_OFF,
1112                        "codec %s can not start from non-off bias with idle_bias_off==1\n",
1113                        codec->name);
1114        }
1115
1116        /* If the driver didn't set I/O up try regmap */
1117        if (!codec->write && dev_get_regmap(codec->dev, NULL))
1118                snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
1119
1120        if (driver->controls)
1121                snd_soc_add_codec_controls(codec, driver->controls,
1122                                     driver->num_controls);
1123        if (driver->dapm_routes)
1124                snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1125                                        driver->num_dapm_routes);
1126
1127        /* mark codec as probed and add to card codec list */
1128        codec->probed = 1;
1129        list_add(&codec->card_list, &card->codec_dev_list);
1130        list_add(&codec->dapm.list, &card->dapm_list);
1131
1132        return 0;
1133
1134err_probe:
1135        soc_cleanup_codec_debugfs(codec);
1136        module_put(codec->dev->driver->owner);
1137
1138        return ret;
1139}
1140
1141static int soc_probe_platform(struct snd_soc_card *card,
1142                           struct snd_soc_platform *platform)
1143{
1144        int ret = 0;
1145        const struct snd_soc_platform_driver *driver = platform->driver;
1146        struct snd_soc_dai *dai;
1147
1148        platform->card = card;
1149        platform->dapm.card = card;
1150
1151        if (!try_module_get(platform->dev->driver->owner))
1152                return -ENODEV;
1153
1154        soc_init_platform_debugfs(platform);
1155
1156        if (driver->dapm_widgets)
1157                snd_soc_dapm_new_controls(&platform->dapm,
1158                        driver->dapm_widgets, driver->num_dapm_widgets);
1159
1160        /* Create DAPM widgets for each DAI stream */
1161        list_for_each_entry(dai, &dai_list, list) {
1162                if (dai->dev != platform->dev)
1163                        continue;
1164
1165                snd_soc_dapm_new_dai_widgets(&platform->dapm, dai);
1166        }
1167
1168        platform->dapm.idle_bias_off = 1;
1169
1170        if (driver->probe) {
1171                ret = driver->probe(platform);
1172                if (ret < 0) {
1173                        dev_err(platform->dev,
1174                                "ASoC: failed to probe platform %d\n", ret);
1175                        goto err_probe;
1176                }
1177        }
1178
1179        if (driver->controls)
1180                snd_soc_add_platform_controls(platform, driver->controls,
1181                                     driver->num_controls);
1182        if (driver->dapm_routes)
1183                snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1184                                        driver->num_dapm_routes);
1185
1186        /* mark platform as probed and add to card platform list */
1187        platform->probed = 1;
1188        list_add(&platform->card_list, &card->platform_dev_list);
1189        list_add(&platform->dapm.list, &card->dapm_list);
1190
1191        return 0;
1192
1193err_probe:
1194        soc_cleanup_platform_debugfs(platform);
1195        module_put(platform->dev->driver->owner);
1196
1197        return ret;
1198}
1199
1200static void rtd_release(struct device *dev)
1201{
1202        kfree(dev);
1203}
1204
1205static int soc_post_component_init(struct snd_soc_card *card,
1206                                   struct snd_soc_codec *codec,
1207                                   int num, int dailess)
1208{
1209        struct snd_soc_dai_link *dai_link = NULL;
1210        struct snd_soc_aux_dev *aux_dev = NULL;
1211        struct snd_soc_pcm_runtime *rtd;
1212        const char *temp, *name;
1213        int ret = 0;
1214
1215        if (!dailess) {
1216                dai_link = &card->dai_link[num];
1217                rtd = &card->rtd[num];
1218                name = dai_link->name;
1219        } else {
1220                aux_dev = &card->aux_dev[num];
1221                rtd = &card->rtd_aux[num];
1222                name = aux_dev->name;
1223        }
1224        rtd->card = card;
1225
1226        /* Make sure all DAPM widgets are instantiated */
1227        snd_soc_dapm_new_widgets(&codec->dapm);
1228
1229        /* machine controls, routes and widgets are not prefixed */
1230        temp = codec->name_prefix;
1231        codec->name_prefix = NULL;
1232
1233        /* do machine specific initialization */
1234        if (!dailess && dai_link->init)
1235                ret = dai_link->init(rtd);
1236        else if (dailess && aux_dev->init)
1237                ret = aux_dev->init(&codec->dapm);
1238        if (ret < 0) {
1239                dev_err(card->dev, "ASoC: failed to init %s: %d\n", name, ret);
1240                return ret;
1241        }
1242        codec->name_prefix = temp;
1243
1244        /* register the rtd device */
1245        rtd->codec = codec;
1246
1247        rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1248        if (!rtd->dev)
1249                return -ENOMEM;
1250        device_initialize(rtd->dev);
1251        rtd->dev->parent = card->dev;
1252        rtd->dev->release = rtd_release;
1253        rtd->dev->init_name = name;
1254        dev_set_drvdata(rtd->dev, rtd);
1255        mutex_init(&rtd->pcm_mutex);
1256        INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1257        INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1258        INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1259        INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1260        ret = device_add(rtd->dev);
1261        if (ret < 0) {
1262                /* calling put_device() here to free the rtd->dev */
1263                put_device(rtd->dev);
1264                dev_err(card->dev,
1265                        "ASoC: failed to register runtime device: %d\n", ret);
1266                return ret;
1267        }
1268        rtd->dev_registered = 1;
1269
1270        /* add DAPM sysfs entries for this codec */
1271        ret = snd_soc_dapm_sys_add(rtd->dev);
1272        if (ret < 0)
1273                dev_err(codec->dev,
1274                        "ASoC: failed to add codec dapm sysfs entries: %d\n", ret);
1275
1276        /* add codec sysfs entries */
1277        ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1278        if (ret < 0)
1279                dev_err(codec->dev,
1280                        "ASoC: failed to add codec sysfs files: %d\n", ret);
1281
1282#ifdef CONFIG_DEBUG_FS
1283        /* add DPCM sysfs entries */
1284        if (!dailess && !dai_link->dynamic)
1285                goto out;
1286
1287        ret = soc_dpcm_debugfs_add(rtd);
1288        if (ret < 0)
1289                dev_err(rtd->dev, "ASoC: failed to add dpcm sysfs entries: %d\n", ret);
1290
1291out:
1292#endif
1293        return 0;
1294}
1295
1296static int soc_probe_link_components(struct snd_soc_card *card, int num,
1297                                     int order)
1298{
1299        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1300        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1301        struct snd_soc_dai *codec_dai = rtd->codec_dai;
1302        struct snd_soc_platform *platform = rtd->platform;
1303        int ret;
1304
1305        /* probe the CPU-side component, if it is a CODEC */
1306        if (cpu_dai->codec &&
1307            !cpu_dai->codec->probed &&
1308            cpu_dai->codec->driver->probe_order == order) {
1309                ret = soc_probe_codec(card, cpu_dai->codec);
1310                if (ret < 0)
1311                        return ret;
1312        }
1313
1314        /* probe the CODEC-side component */
1315        if (!codec_dai->codec->probed &&
1316            codec_dai->codec->driver->probe_order == order) {
1317                ret = soc_probe_codec(card, codec_dai->codec);
1318                if (ret < 0)
1319                        return ret;
1320        }
1321
1322        /* probe the platform */
1323        if (!platform->probed &&
1324            platform->driver->probe_order == order) {
1325                ret = soc_probe_platform(card, platform);
1326                if (ret < 0)
1327                        return ret;
1328        }
1329
1330        return 0;
1331}
1332
1333static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1334{
1335        struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1336        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1337        struct snd_soc_codec *codec = rtd->codec;
1338        struct snd_soc_platform *platform = rtd->platform;
1339        struct snd_soc_dai *codec_dai = rtd->codec_dai;
1340        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1341        struct snd_soc_dapm_widget *play_w, *capture_w;
1342        int ret;
1343
1344        dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1345                        card->name, num, order);
1346
1347        /* config components */
1348        cpu_dai->platform = platform;
1349        codec_dai->card = card;
1350        cpu_dai->card = card;
1351
1352        /* set default power off timeout */
1353        rtd->pmdown_time = pmdown_time;
1354
1355        /* probe the cpu_dai */
1356        if (!cpu_dai->probed &&
1357                        cpu_dai->driver->probe_order == order) {
1358                if (!cpu_dai->codec) {
1359                        cpu_dai->dapm.card = card;
1360                        if (!try_module_get(cpu_dai->dev->driver->owner))
1361                                return -ENODEV;
1362
1363                        list_add(&cpu_dai->dapm.list, &card->dapm_list);
1364                        snd_soc_dapm_new_dai_widgets(&cpu_dai->dapm, cpu_dai);
1365                }
1366
1367                if (cpu_dai->driver->probe) {
1368                        ret = cpu_dai->driver->probe(cpu_dai);
1369                        if (ret < 0) {
1370                                dev_err(cpu_dai->dev,
1371                                        "ASoC: failed to probe CPU DAI %s: %d\n",
1372                                        cpu_dai->name, ret);
1373                                module_put(cpu_dai->dev->driver->owner);
1374                                return ret;
1375                        }
1376                }
1377                cpu_dai->probed = 1;
1378                /* mark cpu_dai as probed and add to card dai list */
1379                list_add(&cpu_dai->card_list, &card->dai_dev_list);
1380        }
1381
1382        /* probe the CODEC DAI */
1383        if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1384                if (codec_dai->driver->probe) {
1385                        ret = codec_dai->driver->probe(codec_dai);
1386                        if (ret < 0) {
1387                                dev_err(codec_dai->dev,
1388                                        "ASoC: failed to probe CODEC DAI %s: %d\n",
1389                                        codec_dai->name, ret);
1390                                return ret;
1391                        }
1392                }
1393
1394                /* mark codec_dai as probed and add to card dai list */
1395                codec_dai->probed = 1;
1396                list_add(&codec_dai->card_list, &card->dai_dev_list);
1397        }
1398
1399        /* complete DAI probe during last probe */
1400        if (order != SND_SOC_COMP_ORDER_LAST)
1401                return 0;
1402
1403        ret = soc_post_component_init(card, codec, num, 0);
1404        if (ret)
1405                return ret;
1406
1407        ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1408        if (ret < 0)
1409                dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
1410                        ret);
1411
1412        if (cpu_dai->driver->compress_dai) {
1413                /*create compress_device"*/
1414                ret = soc_new_compress(rtd, num);
1415                if (ret < 0) {
1416                        dev_err(card->dev, "ASoC: can't create compress %s\n",
1417                                         dai_link->stream_name);
1418                        return ret;
1419                }
1420        } else {
1421
1422                if (!dai_link->params) {
1423                        /* create the pcm */
1424                        ret = soc_new_pcm(rtd, num);
1425                        if (ret < 0) {
1426                                dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1427                                       dai_link->stream_name, ret);
1428                                return ret;
1429                        }
1430                } else {
1431                        /* link the DAI widgets */
1432                        play_w = codec_dai->playback_widget;
1433                        capture_w = cpu_dai->capture_widget;
1434                        if (play_w && capture_w) {
1435                                ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1436                                                   capture_w, play_w);
1437                                if (ret != 0) {
1438                                        dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1439                                                play_w->name, capture_w->name, ret);
1440                                        return ret;
1441                                }
1442                        }
1443
1444                        play_w = cpu_dai->playback_widget;
1445                        capture_w = codec_dai->capture_widget;
1446                        if (play_w && capture_w) {
1447                                ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1448                                                   capture_w, play_w);
1449                                if (ret != 0) {
1450                                        dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1451                                                play_w->name, capture_w->name, ret);
1452                                        return ret;
1453                                }
1454                        }
1455                }
1456        }
1457
1458        /* add platform data for AC97 devices */
1459        if (rtd->codec_dai->driver->ac97_control)
1460                snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1461
1462        return 0;
1463}
1464
1465#ifdef CONFIG_SND_SOC_AC97_BUS
1466static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1467{
1468        int ret;
1469
1470        /* Only instantiate AC97 if not already done by the adaptor
1471         * for the generic AC97 subsystem.
1472         */
1473        if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1474                /*
1475                 * It is possible that the AC97 device is already registered to
1476                 * the device subsystem. This happens when the device is created
1477                 * via snd_ac97_mixer(). Currently only SoC codec that does so
1478                 * is the generic AC97 glue but others migh emerge.
1479                 *
1480                 * In those cases we don't try to register the device again.
1481                 */
1482                if (!rtd->codec->ac97_created)
1483                        return 0;
1484
1485                ret = soc_ac97_dev_register(rtd->codec);
1486                if (ret < 0) {
1487                        dev_err(rtd->codec->dev,
1488                                "ASoC: AC97 device register failed: %d\n", ret);
1489                        return ret;
1490                }
1491
1492                rtd->codec->ac97_registered = 1;
1493        }
1494        return 0;
1495}
1496
1497static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1498{
1499        if (codec->ac97_registered) {
1500                soc_ac97_dev_unregister(codec);
1501                codec->ac97_registered = 0;
1502        }
1503}
1504#endif
1505
1506static int soc_check_aux_dev(struct snd_soc_card *card, int num)
1507{
1508        struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1509        struct snd_soc_codec *codec;
1510
1511        /* find CODEC from registered CODECs*/
1512        list_for_each_entry(codec, &codec_list, list) {
1513                if (!strcmp(codec->name, aux_dev->codec_name))
1514                        return 0;
1515        }
1516
1517        dev_err(card->dev, "ASoC: %s not registered\n", aux_dev->codec_name);
1518
1519        return -EPROBE_DEFER;
1520}
1521
1522static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1523{
1524        struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1525        struct snd_soc_codec *codec;
1526        int ret = -ENODEV;
1527
1528        /* find CODEC from registered CODECs*/
1529        list_for_each_entry(codec, &codec_list, list) {
1530                if (!strcmp(codec->name, aux_dev->codec_name)) {
1531                        if (codec->probed) {
1532                                dev_err(codec->dev,
1533                                        "ASoC: codec already probed");
1534                                ret = -EBUSY;
1535                                goto out;
1536                        }
1537                        goto found;
1538                }
1539        }
1540        /* codec not found */
1541        dev_err(card->dev, "ASoC: codec %s not found", aux_dev->codec_name);
1542        return -EPROBE_DEFER;
1543
1544found:
1545        ret = soc_probe_codec(card, codec);
1546        if (ret < 0)
1547                return ret;
1548
1549        ret = soc_post_component_init(card, codec, num, 1);
1550
1551out:
1552        return ret;
1553}
1554
1555static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1556{
1557        struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1558        struct snd_soc_codec *codec = rtd->codec;
1559
1560        /* unregister the rtd device */
1561        if (rtd->dev_registered) {
1562                device_remove_file(rtd->dev, &dev_attr_codec_reg);
1563                device_unregister(rtd->dev);
1564                rtd->dev_registered = 0;
1565        }
1566
1567        if (codec && codec->probed)
1568                soc_remove_codec(codec);
1569}
1570
1571static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1572                                    enum snd_soc_compress_type compress_type)
1573{
1574        int ret;
1575
1576        if (codec->cache_init)
1577                return 0;
1578
1579        /* override the compress_type if necessary */
1580        if (compress_type && codec->compress_type != compress_type)
1581                codec->compress_type = compress_type;
1582        ret = snd_soc_cache_init(codec);
1583        if (ret < 0) {
1584                dev_err(codec->dev,
1585                        "ASoC: Failed to set cache compression type: %d\n",
1586                        ret);
1587                return ret;
1588        }
1589        codec->cache_init = 1;
1590        return 0;
1591}
1592
1593static int snd_soc_instantiate_card(struct snd_soc_card *card)
1594{
1595        struct snd_soc_codec *codec;
1596        struct snd_soc_codec_conf *codec_conf;
1597        enum snd_soc_compress_type compress_type;
1598        struct snd_soc_dai_link *dai_link;
1599        int ret, i, order, dai_fmt;
1600
1601        mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1602
1603        /* bind DAIs */
1604        for (i = 0; i < card->num_links; i++) {
1605                ret = soc_bind_dai_link(card, i);
1606                if (ret != 0)
1607                        goto base_error;
1608        }
1609
1610        /* check aux_devs too */
1611        for (i = 0; i < card->num_aux_devs; i++) {
1612                ret = soc_check_aux_dev(card, i);
1613                if (ret != 0)
1614                        goto base_error;
1615        }
1616
1617        /* initialize the register cache for each available codec */
1618        list_for_each_entry(codec, &codec_list, list) {
1619                if (codec->cache_init)
1620                        continue;
1621                /* by default we don't override the compress_type */
1622                compress_type = 0;
1623                /* check to see if we need to override the compress_type */
1624                for (i = 0; i < card->num_configs; ++i) {
1625                        codec_conf = &card->codec_conf[i];
1626                        if (!strcmp(codec->name, codec_conf->dev_name)) {
1627                                compress_type = codec_conf->compress_type;
1628                                if (compress_type && compress_type
1629                                    != codec->compress_type)
1630                                        break;
1631                        }
1632                }
1633                ret = snd_soc_init_codec_cache(codec, compress_type);
1634                if (ret < 0)
1635                        goto base_error;
1636        }
1637
1638        /* card bind complete so register a sound card */
1639        ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1640                        card->owner, 0, &card->snd_card);
1641        if (ret < 0) {
1642                dev_err(card->dev,
1643                        "ASoC: can't create sound card for card %s: %d\n",
1644                        card->name, ret);
1645                goto base_error;
1646        }
1647        card->snd_card->dev = card->dev;
1648
1649        card->dapm.bias_level = SND_SOC_BIAS_OFF;
1650        card->dapm.dev = card->dev;
1651        card->dapm.card = card;
1652        list_add(&card->dapm.list, &card->dapm_list);
1653
1654#ifdef CONFIG_DEBUG_FS
1655        snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1656#endif
1657
1658#ifdef CONFIG_PM_SLEEP
1659        /* deferred resume work */
1660        INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1661#endif
1662
1663        if (card->dapm_widgets)
1664                snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1665                                          card->num_dapm_widgets);
1666
1667        /* initialise the sound card only once */
1668        if (card->probe) {
1669                ret = card->probe(card);
1670                if (ret < 0)
1671                        goto card_probe_error;
1672        }
1673
1674        /* probe all components used by DAI links on this card */
1675        for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1676                        order++) {
1677                for (i = 0; i < card->num_links; i++) {
1678                        ret = soc_probe_link_components(card, i, order);
1679                        if (ret < 0) {
1680                                dev_err(card->dev,
1681                                        "ASoC: failed to instantiate card %d\n",
1682                                        ret);
1683                                goto probe_dai_err;
1684                        }
1685                }
1686        }
1687
1688        /* probe all DAI links on this card */
1689        for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1690                        order++) {
1691                for (i = 0; i < card->num_links; i++) {
1692                        ret = soc_probe_link_dais(card, i, order);
1693                        if (ret < 0) {
1694                                dev_err(card->dev,
1695                                        "ASoC: failed to instantiate card %d\n",
1696                                        ret);
1697                                goto probe_dai_err;
1698                        }
1699                }
1700        }
1701
1702        for (i = 0; i < card->num_aux_devs; i++) {
1703                ret = soc_probe_aux_dev(card, i);
1704                if (ret < 0) {
1705                        dev_err(card->dev,
1706                                "ASoC: failed to add auxiliary devices %d\n",
1707                                ret);
1708                        goto probe_aux_dev_err;
1709                }
1710        }
1711
1712        snd_soc_dapm_link_dai_widgets(card);
1713
1714        if (card->controls)
1715                snd_soc_add_card_controls(card, card->controls, card->num_controls);
1716
1717        if (card->dapm_routes)
1718                snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1719                                        card->num_dapm_routes);
1720
1721        snd_soc_dapm_new_widgets(&card->dapm);
1722
1723        for (i = 0; i < card->num_links; i++) {
1724                dai_link = &card->dai_link[i];
1725                dai_fmt = dai_link->dai_fmt;
1726
1727                if (dai_fmt) {
1728                        ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1729                                                  dai_fmt);
1730                        if (ret != 0 && ret != -ENOTSUPP)
1731                                dev_warn(card->rtd[i].codec_dai->dev,
1732                                         "ASoC: Failed to set DAI format: %d\n",
1733                                         ret);
1734                }
1735
1736                /* If this is a regular CPU link there will be a platform */
1737                if (dai_fmt &&
1738                    (dai_link->platform_name || dai_link->platform_of_node)) {
1739                        ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1740                                                  dai_fmt);
1741                        if (ret != 0 && ret != -ENOTSUPP)
1742                                dev_warn(card->rtd[i].cpu_dai->dev,
1743                                         "ASoC: Failed to set DAI format: %d\n",
1744                                         ret);
1745                } else if (dai_fmt) {
1746                        /* Flip the polarity for the "CPU" end */
1747                        dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1748                        switch (dai_link->dai_fmt &
1749                                SND_SOC_DAIFMT_MASTER_MASK) {
1750                        case SND_SOC_DAIFMT_CBM_CFM:
1751                                dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1752                                break;
1753                        case SND_SOC_DAIFMT_CBM_CFS:
1754                                dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1755                                break;
1756                        case SND_SOC_DAIFMT_CBS_CFM:
1757                                dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1758                                break;
1759                        case SND_SOC_DAIFMT_CBS_CFS:
1760                                dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1761                                break;
1762                        }
1763
1764                        ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1765                                                  dai_fmt);
1766                        if (ret != 0 && ret != -ENOTSUPP)
1767                                dev_warn(card->rtd[i].cpu_dai->dev,
1768                                         "ASoC: Failed to set DAI format: %d\n",
1769                                         ret);
1770                }
1771        }
1772
1773        snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1774                 "%s", card->name);
1775        snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1776                 "%s", card->long_name ? card->long_name : card->name);
1777        snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1778                 "%s", card->driver_name ? card->driver_name : card->name);
1779        for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1780                switch (card->snd_card->driver[i]) {
1781                case '_':
1782                case '-':
1783                case '\0':
1784                        break;
1785                default:
1786                        if (!isalnum(card->snd_card->driver[i]))
1787                                card->snd_card->driver[i] = '_';
1788                        break;
1789                }
1790        }
1791
1792        if (card->late_probe) {
1793                ret = card->late_probe(card);
1794                if (ret < 0) {
1795                        dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1796                                card->name, ret);
1797                        goto probe_aux_dev_err;
1798                }
1799        }
1800
1801        snd_soc_dapm_new_widgets(&card->dapm);
1802
1803        if (card->fully_routed)
1804                list_for_each_entry(codec, &card->codec_dev_list, card_list)
1805                        snd_soc_dapm_auto_nc_codec_pins(codec);
1806
1807        ret = snd_card_register(card->snd_card);
1808        if (ret < 0) {
1809                dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1810                                ret);
1811                goto probe_aux_dev_err;
1812        }
1813
1814#ifdef CONFIG_SND_SOC_AC97_BUS
1815        /* register any AC97 codecs */
1816        for (i = 0; i < card->num_rtd; i++) {
1817                ret = soc_register_ac97_dai_link(&card->rtd[i]);
1818                if (ret < 0) {
1819                        dev_err(card->dev,
1820                                "ASoC: failed to register AC97: %d\n", ret);
1821                        while (--i >= 0)
1822                                soc_unregister_ac97_dai_link(card->rtd[i].codec);
1823                        goto probe_aux_dev_err;
1824                }
1825        }
1826#endif
1827
1828        card->instantiated = 1;
1829        snd_soc_dapm_sync(&card->dapm);
1830        mutex_unlock(&card->mutex);
1831
1832        return 0;
1833
1834probe_aux_dev_err:
1835        for (i = 0; i < card->num_aux_devs; i++)
1836                soc_remove_aux_dev(card, i);
1837
1838probe_dai_err:
1839        soc_remove_dai_links(card);
1840
1841card_probe_error:
1842        if (card->remove)
1843                card->remove(card);
1844
1845        snd_card_free(card->snd_card);
1846
1847base_error:
1848        mutex_unlock(&card->mutex);
1849
1850        return ret;
1851}
1852
1853/* probes a new socdev */
1854static int soc_probe(struct platform_device *pdev)
1855{
1856        struct snd_soc_card *card = platform_get_drvdata(pdev);
1857
1858        /*
1859         * no card, so machine driver should be registering card
1860         * we should not be here in that case so ret error
1861         */
1862        if (!card)
1863                return -EINVAL;
1864
1865        dev_warn(&pdev->dev,
1866                 "ASoC: machine %s should use snd_soc_register_card()\n",
1867                 card->name);
1868
1869        /* Bodge while we unpick instantiation */
1870        card->dev = &pdev->dev;
1871
1872        return snd_soc_register_card(card);
1873}
1874
1875static int soc_cleanup_card_resources(struct snd_soc_card *card)
1876{
1877        int i;
1878
1879        /* make sure any delayed work runs */
1880        for (i = 0; i < card->num_rtd; i++) {
1881                struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1882                flush_delayed_work(&rtd->delayed_work);
1883        }
1884
1885        /* remove auxiliary devices */
1886        for (i = 0; i < card->num_aux_devs; i++)
1887                soc_remove_aux_dev(card, i);
1888
1889        /* remove and free each DAI */
1890        soc_remove_dai_links(card);
1891
1892        soc_cleanup_card_debugfs(card);
1893
1894        /* remove the card */
1895        if (card->remove)
1896                card->remove(card);
1897
1898        snd_soc_dapm_free(&card->dapm);
1899
1900        snd_card_free(card->snd_card);
1901        return 0;
1902
1903}
1904
1905/* removes a socdev */
1906static int soc_remove(struct platform_device *pdev)
1907{
1908        struct snd_soc_card *card = platform_get_drvdata(pdev);
1909
1910        snd_soc_unregister_card(card);
1911        return 0;
1912}
1913
1914int snd_soc_poweroff(struct device *dev)
1915{
1916        struct snd_soc_card *card = dev_get_drvdata(dev);
1917        int i;
1918
1919        if (!card->instantiated)
1920                return 0;
1921
1922        /* Flush out pmdown_time work - we actually do want to run it
1923         * now, we're shutting down so no imminent restart. */
1924        for (i = 0; i < card->num_rtd; i++) {
1925                struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1926                flush_delayed_work(&rtd->delayed_work);
1927        }
1928
1929        snd_soc_dapm_shutdown(card);
1930
1931        return 0;
1932}
1933EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1934
1935const struct dev_pm_ops snd_soc_pm_ops = {
1936        .suspend = snd_soc_suspend,
1937        .resume = snd_soc_resume,
1938        .freeze = snd_soc_suspend,
1939        .thaw = snd_soc_resume,
1940        .poweroff = snd_soc_poweroff,
1941        .restore = snd_soc_resume,
1942};
1943EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1944
1945/* ASoC platform driver */
1946static struct platform_driver soc_driver = {
1947        .driver         = {
1948                .name           = "soc-audio",
1949                .owner          = THIS_MODULE,
1950                .pm             = &snd_soc_pm_ops,
1951        },
1952        .probe          = soc_probe,
1953        .remove         = soc_remove,
1954};
1955
1956/**
1957 * snd_soc_codec_volatile_register: Report if a register is volatile.
1958 *
1959 * @codec: CODEC to query.
1960 * @reg: Register to query.
1961 *
1962 * Boolean function indiciating if a CODEC register is volatile.
1963 */
1964int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1965                                    unsigned int reg)
1966{
1967        if (codec->volatile_register)
1968                return codec->volatile_register(codec, reg);
1969        else
1970                return 0;
1971}
1972EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1973
1974/**
1975 * snd_soc_codec_readable_register: Report if a register is readable.
1976 *
1977 * @codec: CODEC to query.
1978 * @reg: Register to query.
1979 *
1980 * Boolean function indicating if a CODEC register is readable.
1981 */
1982int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1983                                    unsigned int reg)
1984{
1985        if (codec->readable_register)
1986                return codec->readable_register(codec, reg);
1987        else
1988                return 1;
1989}
1990EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1991
1992/**
1993 * snd_soc_codec_writable_register: Report if a register is writable.
1994 *
1995 * @codec: CODEC to query.
1996 * @reg: Register to query.
1997 *
1998 * Boolean function indicating if a CODEC register is writable.
1999 */
2000int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
2001                                    unsigned int reg)
2002{
2003        if (codec->writable_register)
2004                return codec->writable_register(codec, reg);
2005        else
2006                return 1;
2007}
2008EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
2009
2010int snd_soc_platform_read(struct snd_soc_platform *platform,
2011                                        unsigned int reg)
2012{
2013        unsigned int ret;
2014
2015        if (!platform->driver->read) {
2016                dev_err(platform->dev, "ASoC: platform has no read back\n");
2017                return -1;
2018        }
2019
2020        ret = platform->driver->read(platform, reg);
2021        dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
2022        trace_snd_soc_preg_read(platform, reg, ret);
2023
2024        return ret;
2025}
2026EXPORT_SYMBOL_GPL(snd_soc_platform_read);
2027
2028int snd_soc_platform_write(struct snd_soc_platform *platform,
2029                                         unsigned int reg, unsigned int val)
2030{
2031        if (!platform->driver->write) {
2032                dev_err(platform->dev, "ASoC: platform has no write back\n");
2033                return -1;
2034        }
2035
2036        dev_dbg(platform->dev, "write %x = %x\n", reg, val);
2037        trace_snd_soc_preg_write(platform, reg, val);
2038        return platform->driver->write(platform, reg, val);
2039}
2040EXPORT_SYMBOL_GPL(snd_soc_platform_write);
2041
2042/**
2043 * snd_soc_new_ac97_codec - initailise AC97 device
2044 * @codec: audio codec
2045 * @ops: AC97 bus operations
2046 * @num: AC97 codec number
2047 *
2048 * Initialises AC97 codec resources for use by ad-hoc devices only.
2049 */
2050int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2051        struct snd_ac97_bus_ops *ops, int num)
2052{
2053        mutex_lock(&codec->mutex);
2054
2055        codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2056        if (codec->ac97 == NULL) {
2057                mutex_unlock(&codec->mutex);
2058                return -ENOMEM;
2059        }
2060
2061        codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2062        if (codec->ac97->bus == NULL) {
2063                kfree(codec->ac97);
2064                codec->ac97 = NULL;
2065                mutex_unlock(&codec->mutex);
2066                return -ENOMEM;
2067        }
2068
2069        codec->ac97->bus->ops = ops;
2070        codec->ac97->num = num;
2071
2072        /*
2073         * Mark the AC97 device to be created by us. This way we ensure that the
2074         * device will be registered with the device subsystem later on.
2075         */
2076        codec->ac97_created = 1;
2077
2078        mutex_unlock(&codec->mutex);
2079        return 0;
2080}
2081EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2082
2083struct snd_ac97_bus_ops *soc_ac97_ops;
2084EXPORT_SYMBOL_GPL(soc_ac97_ops);
2085
2086int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)
2087{
2088        if (ops == soc_ac97_ops)
2089                return 0;
2090
2091        if (soc_ac97_ops && ops)
2092                return -EBUSY;
2093
2094        soc_ac97_ops = ops;
2095
2096        return 0;
2097}
2098EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);
2099
2100/**
2101 * snd_soc_free_ac97_codec - free AC97 codec device
2102 * @codec: audio codec
2103 *
2104 * Frees AC97 codec device resources.
2105 */
2106void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2107{
2108        mutex_lock(&codec->mutex);
2109#ifdef CONFIG_SND_SOC_AC97_BUS
2110        soc_unregister_ac97_dai_link(codec);
2111#endif
2112        kfree(codec->ac97->bus);
2113        kfree(codec->ac97);
2114        codec->ac97 = NULL;
2115        codec->ac97_created = 0;
2116        mutex_unlock(&codec->mutex);
2117}
2118EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2119
2120unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2121{
2122        unsigned int ret;
2123
2124        ret = codec->read(codec, reg);
2125        dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2126        trace_snd_soc_reg_read(codec, reg, ret);
2127
2128        return ret;
2129}
2130EXPORT_SYMBOL_GPL(snd_soc_read);
2131
2132unsigned int snd_soc_write(struct snd_soc_codec *codec,
2133                           unsigned int reg, unsigned int val)
2134{
2135        dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2136        trace_snd_soc_reg_write(codec, reg, val);
2137        return codec->write(codec, reg, val);
2138}
2139EXPORT_SYMBOL_GPL(snd_soc_write);
2140
2141unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2142                                    unsigned int reg, const void *data, size_t len)
2143{
2144        return codec->bulk_write_raw(codec, reg, data, len);
2145}
2146EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2147
2148/**
2149 * snd_soc_update_bits - update codec register bits
2150 * @codec: audio codec
2151 * @reg: codec register
2152 * @mask: register mask
2153 * @value: new value
2154 *
2155 * Writes new register value.
2156 *
2157 * Returns 1 for change, 0 for no change, or negative error code.
2158 */
2159int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2160                                unsigned int mask, unsigned int value)
2161{
2162        bool change;
2163        unsigned int old, new;
2164        int ret;
2165
2166        if (codec->using_regmap) {
2167                ret = regmap_update_bits_check(codec->control_data, reg,
2168                                               mask, value, &change);
2169        } else {
2170                ret = snd_soc_read(codec, reg);
2171                if (ret < 0)
2172                        return ret;
2173
2174                old = ret;
2175                new = (old & ~mask) | (value & mask);
2176                change = old != new;
2177                if (change)
2178                        ret = snd_soc_write(codec, reg, new);
2179        }
2180
2181        if (ret < 0)
2182                return ret;
2183
2184        return change;
2185}
2186EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2187
2188/**
2189 * snd_soc_update_bits_locked - update codec register bits
2190 * @codec: audio codec
2191 * @reg: codec register
2192 * @mask: register mask
2193 * @value: new value
2194 *
2195 * Writes new register value, and takes the codec mutex.
2196 *
2197 * Returns 1 for change else 0.
2198 */
2199int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2200                               unsigned short reg, unsigned int mask,
2201                               unsigned int value)
2202{
2203        int change;
2204
2205        mutex_lock(&codec->mutex);
2206        change = snd_soc_update_bits(codec, reg, mask, value);
2207        mutex_unlock(&codec->mutex);
2208
2209        return change;
2210}
2211EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2212
2213/**
2214 * snd_soc_test_bits - test register for change
2215 * @codec: audio codec
2216 * @reg: codec register
2217 * @mask: register mask
2218 * @value: new value
2219 *
2220 * Tests a register with a new value and checks if the new value is
2221 * different from the old value.
2222 *
2223 * Returns 1 for change else 0.
2224 */
2225int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2226                                unsigned int mask, unsigned int value)
2227{
2228        int change;
2229        unsigned int old, new;
2230
2231        old = snd_soc_read(codec, reg);
2232        new = (old & ~mask) | value;
2233        change = old != new;
2234
2235        return change;
2236}
2237EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2238
2239/**
2240 * snd_soc_cnew - create new control
2241 * @_template: control template
2242 * @data: control private data
2243 * @long_name: control long name
2244 * @prefix: control name prefix
2245 *
2246 * Create a new mixer control from a template control.
2247 *
2248 * Returns 0 for success, else error.
2249 */
2250struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2251                                  void *data, const char *long_name,
2252                                  const char *prefix)
2253{
2254        struct snd_kcontrol_new template;
2255        struct snd_kcontrol *kcontrol;
2256        char *name = NULL;
2257
2258        memcpy(&template, _template, sizeof(template));
2259        template.index = 0;
2260
2261        if (!long_name)
2262                long_name = template.name;
2263
2264        if (prefix) {
2265                name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2266                if (!name)
2267                        return NULL;
2268
2269                template.name = name;
2270        } else {
2271                template.name = long_name;
2272        }
2273
2274        kcontrol = snd_ctl_new1(&template, data);
2275
2276        kfree(name);
2277
2278        return kcontrol;
2279}
2280EXPORT_SYMBOL_GPL(snd_soc_cnew);
2281
2282static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2283        const struct snd_kcontrol_new *controls, int num_controls,
2284        const char *prefix, void *data)
2285{
2286        int err, i;
2287
2288        for (i = 0; i < num_controls; i++) {
2289                const struct snd_kcontrol_new *control = &controls[i];
2290                err = snd_ctl_add(card, snd_soc_cnew(control, data,
2291                                                     control->name, prefix));
2292                if (err < 0) {
2293                        dev_err(dev, "ASoC: Failed to add %s: %d\n",
2294                                control->name, err);
2295                        return err;
2296                }
2297        }
2298
2299        return 0;
2300}
2301
2302/**
2303 * snd_soc_add_codec_controls - add an array of controls to a codec.
2304 * Convenience function to add a list of controls. Many codecs were
2305 * duplicating this code.
2306 *
2307 * @codec: codec to add controls to
2308 * @controls: array of controls to add
2309 * @num_controls: number of elements in the array
2310 *
2311 * Return 0 for success, else error.
2312 */
2313int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2314        const struct snd_kcontrol_new *controls, int num_controls)
2315{
2316        struct snd_card *card = codec->card->snd_card;
2317
2318        return snd_soc_add_controls(card, codec->dev, controls, num_controls,
2319                        codec->name_prefix, codec);
2320}
2321EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2322
2323/**
2324 * snd_soc_add_platform_controls - add an array of controls to a platform.
2325 * Convenience function to add a list of controls.
2326 *
2327 * @platform: platform to add controls to
2328 * @controls: array of controls to add
2329 * @num_controls: number of elements in the array
2330 *
2331 * Return 0 for success, else error.
2332 */
2333int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2334        const struct snd_kcontrol_new *controls, int num_controls)
2335{
2336        struct snd_card *card = platform->card->snd_card;
2337
2338        return snd_soc_add_controls(card, platform->dev, controls, num_controls,
2339                        NULL, platform);
2340}
2341EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2342
2343/**
2344 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2345 * Convenience function to add a list of controls.
2346 *
2347 * @soc_card: SoC card to add controls to
2348 * @controls: array of controls to add
2349 * @num_controls: number of elements in the array
2350 *
2351 * Return 0 for success, else error.
2352 */
2353int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2354        const struct snd_kcontrol_new *controls, int num_controls)
2355{
2356        struct snd_card *card = soc_card->snd_card;
2357
2358        return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2359                        NULL, soc_card);
2360}
2361EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2362
2363/**
2364 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2365 * Convienience function to add a list of controls.
2366 *
2367 * @dai: DAI to add controls to
2368 * @controls: array of controls to add
2369 * @num_controls: number of elements in the array
2370 *
2371 * Return 0 for success, else error.
2372 */
2373int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2374        const struct snd_kcontrol_new *controls, int num_controls)
2375{
2376        struct snd_card *card = dai->card->snd_card;
2377
2378        return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2379                        NULL, dai);
2380}
2381EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2382
2383/**
2384 * snd_soc_info_enum_double - enumerated double mixer info callback
2385 * @kcontrol: mixer control
2386 * @uinfo: control element information
2387 *
2388 * Callback to provide information about a double enumerated
2389 * mixer control.
2390 *
2391 * Returns 0 for success.
2392 */
2393int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2394        struct snd_ctl_elem_info *uinfo)
2395{
2396        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2397
2398        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2399        uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2400        uinfo->value.enumerated.items = e->max;
2401
2402        if (uinfo->value.enumerated.item > e->max - 1)
2403                uinfo->value.enumerated.item = e->max - 1;
2404        strcpy(uinfo->value.enumerated.name,
2405                e->texts[uinfo->value.enumerated.item]);
2406        return 0;
2407}
2408EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2409
2410/**
2411 * snd_soc_get_enum_double - enumerated double mixer get callback
2412 * @kcontrol: mixer control
2413 * @ucontrol: control element information
2414 *
2415 * Callback to get the value of a double enumerated mixer.
2416 *
2417 * Returns 0 for success.
2418 */
2419int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2420        struct snd_ctl_elem_value *ucontrol)
2421{
2422        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2423        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2424        unsigned int val;
2425
2426        val = snd_soc_read(codec, e->reg);
2427        ucontrol->value.enumerated.item[0]
2428                = (val >> e->shift_l) & e->mask;
2429        if (e->shift_l != e->shift_r)
2430                ucontrol->value.enumerated.item[1] =
2431                        (val >> e->shift_r) & e->mask;
2432
2433        return 0;
2434}
2435EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2436
2437/**
2438 * snd_soc_put_enum_double - enumerated double mixer put callback
2439 * @kcontrol: mixer control
2440 * @ucontrol: control element information
2441 *
2442 * Callback to set the value of a double enumerated mixer.
2443 *
2444 * Returns 0 for success.
2445 */
2446int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2447        struct snd_ctl_elem_value *ucontrol)
2448{
2449        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2450        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2451        unsigned int val;
2452        unsigned int mask;
2453
2454        if (ucontrol->value.enumerated.item[0] > e->max - 1)
2455                return -EINVAL;
2456        val = ucontrol->value.enumerated.item[0] << e->shift_l;
2457        mask = e->mask << e->shift_l;
2458        if (e->shift_l != e->shift_r) {
2459                if (ucontrol->value.enumerated.item[1] > e->max - 1)
2460                        return -EINVAL;
2461                val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2462                mask |= e->mask << e->shift_r;
2463        }
2464
2465        return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2466}
2467EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2468
2469/**
2470 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2471 * @kcontrol: mixer control
2472 * @ucontrol: control element information
2473 *
2474 * Callback to get the value of a double semi enumerated mixer.
2475 *
2476 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2477 * used for handling bitfield coded enumeration for example.
2478 *
2479 * Returns 0 for success.
2480 */
2481int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2482        struct snd_ctl_elem_value *ucontrol)
2483{
2484        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2485        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2486        unsigned int reg_val, val, mux;
2487
2488        reg_val = snd_soc_read(codec, e->reg);
2489        val = (reg_val >> e->shift_l) & e->mask;
2490        for (mux = 0; mux < e->max; mux++) {
2491                if (val == e->values[mux])
2492                        break;
2493        }
2494        ucontrol->value.enumerated.item[0] = mux;
2495        if (e->shift_l != e->shift_r) {
2496                val = (reg_val >> e->shift_r) & e->mask;
2497                for (mux = 0; mux < e->max; mux++) {
2498                        if (val == e->values[mux])
2499                                break;
2500                }
2501                ucontrol->value.enumerated.item[1] = mux;
2502        }
2503
2504        return 0;
2505}
2506EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2507
2508/**
2509 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2510 * @kcontrol: mixer control
2511 * @ucontrol: control element information
2512 *
2513 * Callback to set the value of a double semi enumerated mixer.
2514 *
2515 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2516 * used for handling bitfield coded enumeration for example.
2517 *
2518 * Returns 0 for success.
2519 */
2520int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2521        struct snd_ctl_elem_value *ucontrol)
2522{
2523        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2524        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2525        unsigned int val;
2526        unsigned int mask;
2527
2528        if (ucontrol->value.enumerated.item[0] > e->max - 1)
2529                return -EINVAL;
2530        val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2531        mask = e->mask << e->shift_l;
2532        if (e->shift_l != e->shift_r) {
2533                if (ucontrol->value.enumerated.item[1] > e->max - 1)
2534                        return -EINVAL;
2535                val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2536                mask |= e->mask << e->shift_r;
2537        }
2538
2539        return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2540}
2541EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2542
2543/**
2544 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2545 * @kcontrol: mixer control
2546 * @uinfo: control element information
2547 *
2548 * Callback to provide information about an external enumerated
2549 * single mixer.
2550 *
2551 * Returns 0 for success.
2552 */
2553int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2554        struct snd_ctl_elem_info *uinfo)
2555{
2556        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2557
2558        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2559        uinfo->count = 1;
2560        uinfo->value.enumerated.items = e->max;
2561
2562        if (uinfo->value.enumerated.item > e->max - 1)
2563                uinfo->value.enumerated.item = e->max - 1;
2564        strcpy(uinfo->value.enumerated.name,
2565                e->texts[uinfo->value.enumerated.item]);
2566        return 0;
2567}
2568EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2569
2570/**
2571 * snd_soc_info_volsw_ext - external single mixer info callback
2572 * @kcontrol: mixer control
2573 * @uinfo: control element information
2574 *
2575 * Callback to provide information about a single external mixer control.
2576 *
2577 * Returns 0 for success.
2578 */
2579int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2580        struct snd_ctl_elem_info *uinfo)
2581{
2582        int max = kcontrol->private_value;
2583
2584        if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2585                uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2586        else
2587                uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2588
2589        uinfo->count = 1;
2590        uinfo->value.integer.min = 0;
2591        uinfo->value.integer.max = max;
2592        return 0;
2593}
2594EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2595
2596/**
2597 * snd_soc_info_volsw - single mixer info callback
2598 * @kcontrol: mixer control
2599 * @uinfo: control element information
2600 *
2601 * Callback to provide information about a single mixer control, or a double
2602 * mixer control that spans 2 registers.
2603 *
2604 * Returns 0 for success.
2605 */
2606int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2607        struct snd_ctl_elem_info *uinfo)
2608{
2609        struct soc_mixer_control *mc =
2610                (struct soc_mixer_control *)kcontrol->private_value;
2611        int platform_max;
2612
2613        if (!mc->platform_max)
2614                mc->platform_max = mc->max;
2615        platform_max = mc->platform_max;
2616
2617        if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2618                uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2619        else
2620                uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2621
2622        uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2623        uinfo->value.integer.min = 0;
2624        uinfo->value.integer.max = platform_max;
2625        return 0;
2626}
2627EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2628
2629/**
2630 * snd_soc_get_volsw - single mixer get callback
2631 * @kcontrol: mixer control
2632 * @ucontrol: control element information
2633 *
2634 * Callback to get the value of a single mixer control, or a double mixer
2635 * control that spans 2 registers.
2636 *
2637 * Returns 0 for success.
2638 */
2639int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2640        struct snd_ctl_elem_value *ucontrol)
2641{
2642        struct soc_mixer_control *mc =
2643                (struct soc_mixer_control *)kcontrol->private_value;
2644        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2645        unsigned int reg = mc->reg;
2646        unsigned int reg2 = mc->rreg;
2647        unsigned int shift = mc->shift;
2648        unsigned int rshift = mc->rshift;
2649        int max = mc->max;
2650        unsigned int mask = (1 << fls(max)) - 1;
2651        unsigned int invert = mc->invert;
2652
2653        ucontrol->value.integer.value[0] =
2654                (snd_soc_read(codec, reg) >> shift) & mask;
2655        if (invert)
2656                ucontrol->value.integer.value[0] =
2657                        max - ucontrol->value.integer.value[0];
2658
2659        if (snd_soc_volsw_is_stereo(mc)) {
2660                if (reg == reg2)
2661                        ucontrol->value.integer.value[1] =
2662                                (snd_soc_read(codec, reg) >> rshift) & mask;
2663                else
2664                        ucontrol->value.integer.value[1] =
2665                                (snd_soc_read(codec, reg2) >> shift) & mask;
2666                if (invert)
2667                        ucontrol->value.integer.value[1] =
2668                                max - ucontrol->value.integer.value[1];
2669        }
2670
2671        return 0;
2672}
2673EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2674
2675/**
2676 * snd_soc_put_volsw - single mixer put callback
2677 * @kcontrol: mixer control
2678 * @ucontrol: control element information
2679 *
2680 * Callback to set the value of a single mixer control, or a double mixer
2681 * control that spans 2 registers.
2682 *
2683 * Returns 0 for success.
2684 */
2685int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2686        struct snd_ctl_elem_value *ucontrol)
2687{
2688        struct soc_mixer_control *mc =
2689                (struct soc_mixer_control *)kcontrol->private_value;
2690        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2691        unsigned int reg = mc->reg;
2692        unsigned int reg2 = mc->rreg;
2693        unsigned int shift = mc->shift;
2694        unsigned int rshift = mc->rshift;
2695        int max = mc->max;
2696        unsigned int mask = (1 << fls(max)) - 1;
2697        unsigned int invert = mc->invert;
2698        int err;
2699        bool type_2r = 0;
2700        unsigned int val2 = 0;
2701        unsigned int val, val_mask;
2702
2703        val = (ucontrol->value.integer.value[0] & mask);
2704        if (invert)
2705                val = max - val;
2706        val_mask = mask << shift;
2707        val = val << shift;
2708        if (snd_soc_volsw_is_stereo(mc)) {
2709                val2 = (ucontrol->value.integer.value[1] & mask);
2710                if (invert)
2711                        val2 = max - val2;
2712                if (reg == reg2) {
2713                        val_mask |= mask << rshift;
2714                        val |= val2 << rshift;
2715                } else {
2716                        val2 = val2 << shift;
2717                        type_2r = 1;
2718                }
2719        }
2720        err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2721        if (err < 0)
2722                return err;
2723
2724        if (type_2r)
2725                err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2726
2727        return err;
2728}
2729EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2730
2731/**
2732 * snd_soc_get_volsw_sx - single mixer get callback
2733 * @kcontrol: mixer control
2734 * @ucontrol: control element information
2735 *
2736 * Callback to get the value of a single mixer control, or a double mixer
2737 * control that spans 2 registers.
2738 *
2739 * Returns 0 for success.
2740 */
2741int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
2742                      struct snd_ctl_elem_value *ucontrol)
2743{
2744        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2745        struct soc_mixer_control *mc =
2746            (struct soc_mixer_control *)kcontrol->private_value;
2747
2748        unsigned int reg = mc->reg;
2749        unsigned int reg2 = mc->rreg;
2750        unsigned int shift = mc->shift;
2751        unsigned int rshift = mc->rshift;
2752        int max = mc->max;
2753        int min = mc->min;
2754        int mask = (1 << (fls(min + max) - 1)) - 1;
2755
2756        ucontrol->value.integer.value[0] =
2757            ((snd_soc_read(codec, reg) >> shift) - min) & mask;
2758
2759        if (snd_soc_volsw_is_stereo(mc))
2760                ucontrol->value.integer.value[1] =
2761                        ((snd_soc_read(codec, reg2) >> rshift) - min) & mask;
2762
2763        return 0;
2764}
2765EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);
2766
2767/**
2768 * snd_soc_put_volsw_sx - double mixer set callback
2769 * @kcontrol: mixer control
2770 * @uinfo: control element information
2771 *
2772 * Callback to set the value of a double mixer control that spans 2 registers.
2773 *
2774 * Returns 0 for success.
2775 */
2776int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
2777                         struct snd_ctl_elem_value *ucontrol)
2778{
2779        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2780        struct soc_mixer_control *mc =
2781            (struct soc_mixer_control *)kcontrol->private_value;
2782
2783        unsigned int reg = mc->reg;
2784        unsigned int reg2 = mc->rreg;
2785        unsigned int shift = mc->shift;
2786        unsigned int rshift = mc->rshift;
2787        int max = mc->max;
2788        int min = mc->min;
2789        int mask = (1 << (fls(min + max) - 1)) - 1;
2790        int err = 0;
2791        unsigned short val, val_mask, val2 = 0;
2792
2793        val_mask = mask << shift;
2794        val = (ucontrol->value.integer.value[0] + min) & mask;
2795        val = val << shift;
2796
2797        err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2798        if (err < 0)
2799                return err;
2800
2801        if (snd_soc_volsw_is_stereo(mc)) {
2802                val_mask = mask << rshift;
2803                val2 = (ucontrol->value.integer.value[1] + min) & mask;
2804                val2 = val2 << rshift;
2805
2806                if (snd_soc_update_bits_locked(codec, reg2, val_mask, val2))
2807                        return err;
2808        }
2809        return 0;
2810}
2811EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);
2812
2813/**
2814 * snd_soc_info_volsw_s8 - signed mixer info callback
2815 * @kcontrol: mixer control
2816 * @uinfo: control element information
2817 *
2818 * Callback to provide information about a signed mixer control.
2819 *
2820 * Returns 0 for success.
2821 */
2822int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2823        struct snd_ctl_elem_info *uinfo)
2824{
2825        struct soc_mixer_control *mc =
2826                (struct soc_mixer_control *)kcontrol->private_value;
2827        int platform_max;
2828        int min = mc->min;
2829
2830        if (!mc->platform_max)
2831                mc->platform_max = mc->max;
2832        platform_max = mc->platform_max;
2833
2834        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2835        uinfo->count = 2;
2836        uinfo->value.integer.min = 0;
2837        uinfo->value.integer.max = platform_max - min;
2838        return 0;
2839}
2840EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2841
2842/**
2843 * snd_soc_get_volsw_s8 - signed mixer get callback
2844 * @kcontrol: mixer control
2845 * @ucontrol: control element information
2846 *
2847 * Callback to get the value of a signed mixer control.
2848 *
2849 * Returns 0 for success.
2850 */
2851int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2852        struct snd_ctl_elem_value *ucontrol)
2853{
2854        struct soc_mixer_control *mc =
2855                (struct soc_mixer_control *)kcontrol->private_value;
2856        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2857        unsigned int reg = mc->reg;
2858        int min = mc->min;
2859        int val = snd_soc_read(codec, reg);
2860
2861        ucontrol->value.integer.value[0] =
2862                ((signed char)(val & 0xff))-min;
2863        ucontrol->value.integer.value[1] =
2864                ((signed char)((val >> 8) & 0xff))-min;
2865        return 0;
2866}
2867EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2868
2869/**
2870 * snd_soc_put_volsw_sgn - signed mixer put callback
2871 * @kcontrol: mixer control
2872 * @ucontrol: control element information
2873 *
2874 * Callback to set the value of a signed mixer control.
2875 *
2876 * Returns 0 for success.
2877 */
2878int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2879        struct snd_ctl_elem_value *ucontrol)
2880{
2881        struct soc_mixer_control *mc =
2882                (struct soc_mixer_control *)kcontrol->private_value;
2883        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2884        unsigned int reg = mc->reg;
2885        int min = mc->min;
2886        unsigned int val;
2887
2888        val = (ucontrol->value.integer.value[0]+min) & 0xff;
2889        val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2890
2891        return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2892}
2893EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2894
2895/**
2896 * snd_soc_info_volsw_range - single mixer info callback with range.
2897 * @kcontrol: mixer control
2898 * @uinfo: control element information
2899 *
2900 * Callback to provide information, within a range, about a single
2901 * mixer control.
2902 *
2903 * returns 0 for success.
2904 */
2905int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
2906        struct snd_ctl_elem_info *uinfo)
2907{
2908        struct soc_mixer_control *mc =
2909                (struct soc_mixer_control *)kcontrol->private_value;
2910        int platform_max;
2911        int min = mc->min;
2912
2913        if (!mc->platform_max)
2914                mc->platform_max = mc->max;
2915        platform_max = mc->platform_max;
2916
2917        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2918        uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2919        uinfo->value.integer.min = 0;
2920        uinfo->value.integer.max = platform_max - min;
2921
2922        return 0;
2923}
2924EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);
2925
2926/**
2927 * snd_soc_put_volsw_range - single mixer put value callback with range.
2928 * @kcontrol: mixer control
2929 * @ucontrol: control element information
2930 *
2931 * Callback to set the value, within a range, for a single mixer control.
2932 *
2933 * Returns 0 for success.
2934 */
2935int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
2936        struct snd_ctl_elem_value *ucontrol)
2937{
2938        struct soc_mixer_control *mc =
2939                (struct soc_mixer_control *)kcontrol->private_value;
2940        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2941        unsigned int reg = mc->reg;
2942        unsigned int rreg = mc->rreg;
2943        unsigned int shift = mc->shift;
2944        int min = mc->min;
2945        int max = mc->max;
2946        unsigned int mask = (1 << fls(max)) - 1;
2947        unsigned int invert = mc->invert;
2948        unsigned int val, val_mask;
2949        int ret;
2950
2951        val = ((ucontrol->value.integer.value[0] + min) & mask);
2952        if (invert)
2953                val = max - val;
2954        val_mask = mask << shift;
2955        val = val << shift;
2956
2957        ret = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2958        if (ret < 0)
2959                return ret;
2960
2961        if (snd_soc_volsw_is_stereo(mc)) {
2962                val = ((ucontrol->value.integer.value[1] + min) & mask);
2963                if (invert)
2964                        val = max - val;
2965                val_mask = mask << shift;
2966                val = val << shift;
2967
2968                ret = snd_soc_update_bits_locked(codec, rreg, val_mask, val);
2969        }
2970
2971        return ret;
2972}
2973EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);
2974
2975/**
2976 * snd_soc_get_volsw_range - single mixer get callback with range
2977 * @kcontrol: mixer control
2978 * @ucontrol: control element information
2979 *
2980 * Callback to get the value, within a range, of a single mixer control.
2981 *
2982 * Returns 0 for success.
2983 */
2984int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
2985        struct snd_ctl_elem_value *ucontrol)
2986{
2987        struct soc_mixer_control *mc =
2988                (struct soc_mixer_control *)kcontrol->private_value;
2989        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2990        unsigned int reg = mc->reg;
2991        unsigned int rreg = mc->rreg;
2992        unsigned int shift = mc->shift;
2993        int min = mc->min;
2994        int max = mc->max;
2995        unsigned int mask = (1 << fls(max)) - 1;
2996        unsigned int invert = mc->invert;
2997
2998        ucontrol->value.integer.value[0] =
2999                (snd_soc_read(codec, reg) >> shift) & mask;
3000        if (invert)
3001                ucontrol->value.integer.value[0] =
3002                        max - ucontrol->value.integer.value[0];
3003        ucontrol->value.integer.value[0] =
3004                ucontrol->value.integer.value[0] - min;
3005
3006        if (snd_soc_volsw_is_stereo(mc)) {
3007                ucontrol->value.integer.value[1] =
3008                        (snd_soc_read(codec, rreg) >> shift) & mask;
3009                if (invert)
3010                        ucontrol->value.integer.value[1] =
3011                                max - ucontrol->value.integer.value[1];
3012                ucontrol->value.integer.value[1] =
3013                        ucontrol->value.integer.value[1] - min;
3014        }
3015
3016        return 0;
3017}
3018EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
3019
3020/**
3021 * snd_soc_limit_volume - Set new limit to an existing volume control.
3022 *
3023 * @codec: where to look for the control
3024 * @name: Name of the control
3025 * @max: new maximum limit
3026 *
3027 * Return 0 for success, else error.
3028 */
3029int snd_soc_limit_volume(struct snd_soc_codec *codec,
3030        const char *name, int max)
3031{
3032        struct snd_card *card = codec->card->snd_card;
3033        struct snd_kcontrol *kctl;
3034        struct soc_mixer_control *mc;
3035        int found = 0;
3036        int ret = -EINVAL;
3037
3038        /* Sanity check for name and max */
3039        if (unlikely(!name || max <= 0))
3040                return -EINVAL;
3041
3042        list_for_each_entry(kctl, &card->controls, list) {
3043                if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3044                        found = 1;
3045                        break;
3046                }
3047        }
3048        if (found) {
3049                mc = (struct soc_mixer_control *)kctl->private_value;
3050                if (max <= mc->max) {
3051                        mc->platform_max = max;
3052                        ret = 0;
3053                }
3054        }
3055        return ret;
3056}
3057EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3058
3059int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
3060                       struct snd_ctl_elem_info *uinfo)
3061{
3062        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3063        struct soc_bytes *params = (void *)kcontrol->private_value;
3064
3065        uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
3066        uinfo->count = params->num_regs * codec->val_bytes;
3067
3068        return 0;
3069}
3070EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
3071
3072int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
3073                      struct snd_ctl_elem_value *ucontrol)
3074{
3075        struct soc_bytes *params = (void *)kcontrol->private_value;
3076        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3077        int ret;
3078
3079        if (codec->using_regmap)
3080                ret = regmap_raw_read(codec->control_data, params->base,
3081                                      ucontrol->value.bytes.data,
3082                                      params->num_regs * codec->val_bytes);
3083        else
3084                ret = -EINVAL;
3085
3086        /* Hide any masked bytes to ensure consistent data reporting */
3087        if (ret == 0 && params->mask) {
3088                switch (codec->val_bytes) {
3089                case 1:
3090                        ucontrol->value.bytes.data[0] &= ~params->mask;
3091                        break;
3092                case 2:
3093                        ((u16 *)(&ucontrol->value.bytes.data))[0]
3094                                &= ~params->mask;
3095                        break;
3096                case 4:
3097                        ((u32 *)(&ucontrol->value.bytes.data))[0]
3098                                &= ~params->mask;
3099                        break;
3100                default:
3101                        return -EINVAL;
3102                }
3103        }
3104
3105        return ret;
3106}
3107EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
3108
3109int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
3110                      struct snd_ctl_elem_value *ucontrol)
3111{
3112        struct soc_bytes *params = (void *)kcontrol->private_value;
3113        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3114        int ret, len;
3115        unsigned int val;
3116        void *data;
3117
3118        if (!codec->using_regmap)
3119                return -EINVAL;
3120
3121        len = params->num_regs * codec->val_bytes;
3122
3123        data = kmemdup(ucontrol->value.bytes.data, len, GFP_KERNEL | GFP_DMA);
3124        if (!data)
3125                return -ENOMEM;
3126
3127        /*
3128         * If we've got a mask then we need to preserve the register
3129         * bits.  We shouldn't modify the incoming data so take a
3130         * copy.
3131         */
3132        if (params->mask) {
3133                ret = regmap_read(codec->control_data, params->base, &val);
3134                if (ret != 0)
3135                        goto out;
3136
3137                val &= params->mask;
3138
3139                switch (codec->val_bytes) {
3140                case 1:
3141                        ((u8 *)data)[0] &= ~params->mask;
3142                        ((u8 *)data)[0] |= val;
3143                        break;
3144                case 2:
3145                        ((u16 *)data)[0] &= cpu_to_be16(~params->mask);
3146                        ((u16 *)data)[0] |= cpu_to_be16(val);
3147                        break;
3148                case 4:
3149                        ((u32 *)data)[0] &= cpu_to_be32(~params->mask);
3150                        ((u32 *)data)[0] |= cpu_to_be32(val);
3151                        break;
3152                default:
3153                        ret = -EINVAL;
3154                        goto out;
3155                }
3156        }
3157
3158        ret = regmap_raw_write(codec->control_data, params->base,
3159                               data, len);
3160
3161out:
3162        kfree(data);
3163
3164        return ret;
3165}
3166EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
3167
3168/**
3169 * snd_soc_info_xr_sx - signed multi register info callback
3170 * @kcontrol: mreg control
3171 * @uinfo: control element information
3172 *
3173 * Callback to provide information of a control that can
3174 * span multiple codec registers which together
3175 * forms a single signed value in a MSB/LSB manner.
3176 *
3177 * Returns 0 for success.
3178 */
3179int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
3180        struct snd_ctl_elem_info *uinfo)
3181{
3182        struct soc_mreg_control *mc =
3183                (struct soc_mreg_control *)kcontrol->private_value;
3184        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3185        uinfo->count = 1;
3186        uinfo->value.integer.min = mc->min;
3187        uinfo->value.integer.max = mc->max;
3188
3189        return 0;
3190}
3191EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);
3192
3193/**
3194 * snd_soc_get_xr_sx - signed multi register get callback
3195 * @kcontrol: mreg control
3196 * @ucontrol: control element information
3197 *
3198 * Callback to get the value of a control that can span
3199 * multiple codec registers which together forms a single
3200 * signed value in a MSB/LSB manner. The control supports
3201 * specifying total no of bits used to allow for bitfields
3202 * across the multiple codec registers.
3203 *
3204 * Returns 0 for success.
3205 */
3206int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
3207        struct snd_ctl_elem_value *ucontrol)
3208{
3209        struct soc_mreg_control *mc =
3210                (struct soc_mreg_control *)kcontrol->private_value;
3211        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3212        unsigned int regbase = mc->regbase;
3213        unsigned int regcount = mc->regcount;
3214        unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3215        unsigned int regwmask = (1<<regwshift)-1;
3216        unsigned int invert = mc->invert;
3217        unsigned long mask = (1UL<<mc->nbits)-1;
3218        long min = mc->min;
3219        long max = mc->max;
3220        long val = 0;
3221        unsigned long regval;
3222        unsigned int i;
3223
3224        for (i = 0; i < regcount; i++) {
3225                regval = snd_soc_read(codec, regbase+i) & regwmask;
3226                val |= regval << (regwshift*(regcount-i-1));
3227        }
3228        val &= mask;
3229        if (min < 0 && val > max)
3230                val |= ~mask;
3231        if (invert)
3232                val = max - val;
3233        ucontrol->value.integer.value[0] = val;
3234
3235        return 0;
3236}
3237EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);
3238
3239/**
3240 * snd_soc_put_xr_sx - signed multi register get callback
3241 * @kcontrol: mreg control
3242 * @ucontrol: control element information
3243 *
3244 * Callback to set the value of a control that can span
3245 * multiple codec registers which together forms a single
3246 * signed value in a MSB/LSB manner. The control supports
3247 * specifying total no of bits used to allow for bitfields
3248 * across the multiple codec registers.
3249 *
3250 * Returns 0 for success.
3251 */
3252int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
3253        struct snd_ctl_elem_value *ucontrol)
3254{
3255        struct soc_mreg_control *mc =
3256                (struct soc_mreg_control *)kcontrol->private_value;
3257        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3258        unsigned int regbase = mc->regbase;
3259        unsigned int regcount = mc->regcount;
3260        unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3261        unsigned int regwmask = (1<<regwshift)-1;
3262        unsigned int invert = mc->invert;
3263        unsigned long mask = (1UL<<mc->nbits)-1;
3264        long max = mc->max;
3265        long val = ucontrol->value.integer.value[0];
3266        unsigned int i, regval, regmask;
3267        int err;
3268
3269        if (invert)
3270                val = max - val;
3271        val &= mask;
3272        for (i = 0; i < regcount; i++) {
3273                regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
3274                regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
3275                err = snd_soc_update_bits_locked(codec, regbase+i,
3276                                regmask, regval);
3277                if (err < 0)
3278                        return err;
3279        }
3280
3281        return 0;
3282}
3283EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);
3284
3285/**
3286 * snd_soc_get_strobe - strobe get callback
3287 * @kcontrol: mixer control
3288 * @ucontrol: control element information
3289 *
3290 * Callback get the value of a strobe mixer control.
3291 *
3292 * Returns 0 for success.
3293 */
3294int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
3295        struct snd_ctl_elem_value *ucontrol)
3296{
3297        struct soc_mixer_control *mc =
3298                (struct soc_mixer_control *)kcontrol->private_value;
3299        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3300        unsigned int reg = mc->reg;
3301        unsigned int shift = mc->shift;
3302        unsigned int mask = 1 << shift;
3303        unsigned int invert = mc->invert != 0;
3304        unsigned int val = snd_soc_read(codec, reg) & mask;
3305
3306        if (shift != 0 && val != 0)
3307                val = val >> shift;
3308        ucontrol->value.enumerated.item[0] = val ^ invert;
3309
3310        return 0;
3311}
3312EXPORT_SYMBOL_GPL(snd_soc_get_strobe);
3313
3314/**
3315 * snd_soc_put_strobe - strobe put callback
3316 * @kcontrol: mixer control
3317 * @ucontrol: control element information
3318 *
3319 * Callback strobe a register bit to high then low (or the inverse)
3320 * in one pass of a single mixer enum control.
3321 *
3322 * Returns 1 for success.
3323 */
3324int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
3325        struct snd_ctl_elem_value *ucontrol)
3326{
3327        struct soc_mixer_control *mc =
3328                (struct soc_mixer_control *)kcontrol->private_value;
3329        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3330        unsigned int reg = mc->reg;
3331        unsigned int shift = mc->shift;
3332        unsigned int mask = 1 << shift;
3333        unsigned int invert = mc->invert != 0;
3334        unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
3335        unsigned int val1 = (strobe ^ invert) ? mask : 0;
3336        unsigned int val2 = (strobe ^ invert) ? 0 : mask;
3337        int err;
3338
3339        err = snd_soc_update_bits_locked(codec, reg, mask, val1);
3340        if (err < 0)
3341                return err;
3342
3343        err = snd_soc_update_bits_locked(codec, reg, mask, val2);
3344        return err;
3345}
3346EXPORT_SYMBOL_GPL(snd_soc_put_strobe);
3347
3348/**
3349 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3350 * @dai: DAI
3351 * @clk_id: DAI specific clock ID
3352 * @freq: new clock frequency in Hz
3353 * @dir: new clock direction - input/output.
3354 *
3355 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3356 */
3357int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3358        unsigned int freq, int dir)
3359{
3360        if (dai->driver && dai->driver->ops->set_sysclk)
3361                return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3362        else if (dai->codec && dai->codec->driver->set_sysclk)
3363                return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
3364                                                      freq, dir);
3365        else
3366                return -EINVAL;
3367}
3368EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3369
3370/**
3371 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3372 * @codec: CODEC
3373 * @clk_id: DAI specific clock ID
3374 * @source: Source for the clock
3375 * @freq: new clock frequency in Hz
3376 * @dir: new clock direction - input/output.
3377 *
3378 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3379 */
3380int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3381                             int source, unsigned int freq, int dir)
3382{
3383        if (codec->driver->set_sysclk)
3384                return codec->driver->set_sysclk(codec, clk_id, source,
3385                                                 freq, dir);
3386        else
3387                return -EINVAL;
3388}
3389EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3390
3391/**
3392 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3393 * @dai: DAI
3394 * @div_id: DAI specific clock divider ID
3395 * @div: new clock divisor.
3396 *
3397 * Configures the clock dividers. This is used to derive the best DAI bit and
3398 * frame clocks from the system or master clock. It's best to set the DAI bit
3399 * and frame clocks as low as possible to save system power.
3400 */
3401int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3402        int div_id, int div)
3403{
3404        if (dai->driver && dai->driver->ops->set_clkdiv)
3405                return dai->driver->ops->set_clkdiv(dai, div_id, div);
3406        else
3407                return -EINVAL;
3408}
3409EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3410
3411/**
3412 * snd_soc_dai_set_pll - configure DAI PLL.
3413 * @dai: DAI
3414 * @pll_id: DAI specific PLL ID
3415 * @source: DAI specific source for the PLL
3416 * @freq_in: PLL input clock frequency in Hz
3417 * @freq_out: requested PLL output clock frequency in Hz
3418 *
3419 * Configures and enables PLL to generate output clock based on input clock.
3420 */
3421int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3422        unsigned int freq_in, unsigned int freq_out)
3423{
3424        if (dai->driver && dai->driver->ops->set_pll)
3425                return dai->driver->ops->set_pll(dai, pll_id, source,
3426                                         freq_in, freq_out);
3427        else if (dai->codec && dai->codec->driver->set_pll)
3428                return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3429                                                   freq_in, freq_out);
3430        else
3431                return -EINVAL;
3432}
3433EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3434
3435/*
3436 * snd_soc_codec_set_pll - configure codec PLL.
3437 * @codec: CODEC
3438 * @pll_id: DAI specific PLL ID
3439 * @source: DAI specific source for the PLL
3440 * @freq_in: PLL input clock frequency in Hz
3441 * @freq_out: requested PLL output clock frequency in Hz
3442 *
3443 * Configures and enables PLL to generate output clock based on input clock.
3444 */
3445int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3446                          unsigned int freq_in, unsigned int freq_out)
3447{
3448        if (codec->driver->set_pll)
3449                return codec->driver->set_pll(codec, pll_id, source,
3450                                              freq_in, freq_out);
3451        else
3452                return -EINVAL;
3453}
3454EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3455
3456/**
3457 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3458 * @dai: DAI
3459 * @fmt: SND_SOC_DAIFMT_ format value.
3460 *
3461 * Configures the DAI hardware format and clocking.
3462 */
3463int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3464{
3465        if (dai->driver == NULL)
3466                return -EINVAL;
3467        if (dai->driver->ops->set_fmt == NULL)
3468                return -ENOTSUPP;
3469        return dai->driver->ops->set_fmt(dai, fmt);
3470}
3471EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3472
3473/**
3474 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3475 * @dai: DAI
3476 * @tx_mask: bitmask representing active TX slots.
3477 * @rx_mask: bitmask representing active RX slots.
3478 * @slots: Number of slots in use.
3479 * @slot_width: Width in bits for each slot.
3480 *
3481 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3482 * specific.
3483 */
3484int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3485        unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3486{
3487        if (dai->driver && dai->driver->ops->set_tdm_slot)
3488                return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3489                                slots, slot_width);
3490        else
3491                return -EINVAL;
3492}
3493EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3494
3495/**
3496 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3497 * @dai: DAI
3498 * @tx_num: how many TX channels
3499 * @tx_slot: pointer to an array which imply the TX slot number channel
3500 *           0~num-1 uses
3501 * @rx_num: how many RX channels
3502 * @rx_slot: pointer to an array which imply the RX slot number channel
3503 *           0~num-1 uses
3504 *
3505 * configure the relationship between channel number and TDM slot number.
3506 */
3507int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3508        unsigned int tx_num, unsigned int *tx_slot,
3509        unsigned int rx_num, unsigned int *rx_slot)
3510{
3511        if (dai->driver && dai->driver->ops->set_channel_map)
3512                return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3513                        rx_num, rx_slot);
3514        else
3515                return -EINVAL;
3516}
3517EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3518
3519/**
3520 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3521 * @dai: DAI
3522 * @tristate: tristate enable
3523 *
3524 * Tristates the DAI so that others can use it.
3525 */
3526int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3527{
3528        if (dai->driver && dai->driver->ops->set_tristate)
3529                return dai->driver->ops->set_tristate(dai, tristate);
3530        else
3531                return -EINVAL;
3532}
3533EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3534
3535/**
3536 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3537 * @dai: DAI
3538 * @mute: mute enable
3539 * @direction: stream to mute
3540 *
3541 * Mutes the DAI DAC.
3542 */
3543int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
3544                             int direction)
3545{
3546        if (!dai->driver)
3547                return -ENOTSUPP;
3548
3549        if (dai->driver->ops->mute_stream)
3550                return dai->driver->ops->mute_stream(dai, mute, direction);
3551        else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
3552                 dai->driver->ops->digital_mute)
3553                return dai->driver->ops->digital_mute(dai, mute);
3554        else
3555                return -ENOTSUPP;
3556}
3557EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3558
3559/**
3560 * snd_soc_register_card - Register a card with the ASoC core
3561 *
3562 * @card: Card to register
3563 *
3564 */
3565int snd_soc_register_card(struct snd_soc_card *card)
3566{
3567        int i, ret;
3568
3569        if (!card->name || !card->dev)
3570                return -EINVAL;
3571
3572        for (i = 0; i < card->num_links; i++) {
3573                struct snd_soc_dai_link *link = &card->dai_link[i];
3574
3575                /*
3576                 * Codec must be specified by 1 of name or OF node,
3577                 * not both or neither.
3578                 */
3579                if (!!link->codec_name == !!link->codec_of_node) {
3580                        dev_err(card->dev,
3581                                "ASoC: Neither/both codec name/of_node are set for %s\n",
3582                                link->name);
3583                        return -EINVAL;
3584                }
3585                /* Codec DAI name must be specified */
3586                if (!link->codec_dai_name) {
3587                        dev_err(card->dev,
3588                                "ASoC: codec_dai_name not set for %s\n",
3589                                link->name);
3590                        return -EINVAL;
3591                }
3592
3593                /*
3594                 * Platform may be specified by either name or OF node, but
3595                 * can be left unspecified, and a dummy platform will be used.
3596                 */
3597                if (link->platform_name && link->platform_of_node) {
3598                        dev_err(card->dev,
3599                                "ASoC: Both platform name/of_node are set for %s\n",
3600                                link->name);
3601                        return -EINVAL;
3602                }
3603
3604                /*
3605                 * CPU device may be specified by either name or OF node, but
3606                 * can be left unspecified, and will be matched based on DAI
3607                 * name alone..
3608                 */
3609                if (link->cpu_name && link->cpu_of_node) {
3610                        dev_err(card->dev,
3611                                "ASoC: Neither/both cpu name/of_node are set for %s\n",
3612                                link->name);
3613                        return -EINVAL;
3614                }
3615                /*
3616                 * At least one of CPU DAI name or CPU device name/node must be
3617                 * specified
3618                 */
3619                if (!link->cpu_dai_name &&
3620                    !(link->cpu_name || link->cpu_of_node)) {
3621                        dev_err(card->dev,
3622                                "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
3623                                link->name);
3624                        return -EINVAL;
3625                }
3626        }
3627
3628        dev_set_drvdata(card->dev, card);
3629
3630        snd_soc_initialize_card_lists(card);
3631
3632        soc_init_card_debugfs(card);
3633
3634        card->rtd = devm_kzalloc(card->dev,
3635                                 sizeof(struct snd_soc_pcm_runtime) *
3636                                 (card->num_links + card->num_aux_devs),
3637                                 GFP_KERNEL);
3638        if (card->rtd == NULL)
3639                return -ENOMEM;
3640        card->num_rtd = 0;
3641        card->rtd_aux = &card->rtd[card->num_links];
3642
3643        for (i = 0; i < card->num_links; i++)
3644                card->rtd[i].dai_link = &card->dai_link[i];
3645
3646        INIT_LIST_HEAD(&card->list);
3647        INIT_LIST_HEAD(&card->dapm_dirty);
3648        card->instantiated = 0;
3649        mutex_init(&card->mutex);
3650        mutex_init(&card->dapm_mutex);
3651
3652        ret = snd_soc_instantiate_card(card);
3653        if (ret != 0)
3654                soc_cleanup_card_debugfs(card);
3655
3656        return ret;
3657}
3658EXPORT_SYMBOL_GPL(snd_soc_register_card);
3659
3660/**
3661 * snd_soc_unregister_card - Unregister a card with the ASoC core
3662 *
3663 * @card: Card to unregister
3664 *
3665 */
3666int snd_soc_unregister_card(struct snd_soc_card *card)
3667{
3668        if (card->instantiated)
3669                soc_cleanup_card_resources(card);
3670        dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
3671
3672        return 0;
3673}
3674EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3675
3676/*
3677 * Simplify DAI link configuration by removing ".-1" from device names
3678 * and sanitizing names.
3679 */
3680static char *fmt_single_name(struct device *dev, int *id)
3681{
3682        char *found, name[NAME_SIZE];
3683        int id1, id2;
3684
3685        if (dev_name(dev) == NULL)
3686                return NULL;
3687
3688        strlcpy(name, dev_name(dev), NAME_SIZE);
3689
3690        /* are we a "%s.%d" name (platform and SPI components) */
3691        found = strstr(name, dev->driver->name);
3692        if (found) {
3693                /* get ID */
3694                if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3695
3696                        /* discard ID from name if ID == -1 */
3697                        if (*id == -1)
3698                                found[strlen(dev->driver->name)] = '\0';
3699                }
3700
3701        } else {
3702                /* I2C component devices are named "bus-addr"  */
3703                if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3704                        char tmp[NAME_SIZE];
3705
3706                        /* create unique ID number from I2C addr and bus */
3707                        *id = ((id1 & 0xffff) << 16) + id2;
3708
3709                        /* sanitize component name for DAI link creation */
3710                        snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3711                        strlcpy(name, tmp, NAME_SIZE);
3712                } else
3713                        *id = 0;
3714        }
3715
3716        return kstrdup(name, GFP_KERNEL);
3717}
3718
3719/*
3720 * Simplify DAI link naming for single devices with multiple DAIs by removing
3721 * any ".-1" and using the DAI name (instead of device name).
3722 */
3723static inline char *fmt_multiple_name(struct device *dev,
3724                struct snd_soc_dai_driver *dai_drv)
3725{
3726        if (dai_drv->name == NULL) {
3727                dev_err(dev,
3728                        "ASoC: error - multiple DAI %s registered with no name\n",
3729                        dev_name(dev));
3730                return NULL;
3731        }
3732
3733        return kstrdup(dai_drv->name, GFP_KERNEL);
3734}
3735
3736/**
3737 * snd_soc_register_dai - Register a DAI with the ASoC core
3738 *
3739 * @dai: DAI to register
3740 */
3741static int snd_soc_register_dai(struct device *dev,
3742                struct snd_soc_dai_driver *dai_drv)
3743{
3744        struct snd_soc_codec *codec;
3745        struct snd_soc_dai *dai;
3746
3747        dev_dbg(dev, "ASoC: dai register %s\n", dev_name(dev));
3748
3749        dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3750        if (dai == NULL)
3751                return -ENOMEM;
3752
3753        /* create DAI component name */
3754        dai->name = fmt_single_name(dev, &dai->id);
3755        if (dai->name == NULL) {
3756                kfree(dai);
3757                return -ENOMEM;
3758        }
3759
3760        dai->dev = dev;
3761        dai->driver = dai_drv;
3762        dai->dapm.dev = dev;
3763        if (!dai->driver->ops)
3764                dai->driver->ops = &null_dai_ops;
3765
3766        mutex_lock(&client_mutex);
3767
3768        list_for_each_entry(codec, &codec_list, list) {
3769                if (codec->dev == dev) {
3770                        dev_dbg(dev, "ASoC: Mapped DAI %s to CODEC %s\n",
3771                                dai->name, codec->name);
3772                        dai->codec = codec;
3773                        break;
3774                }
3775        }
3776
3777        if (!dai->codec)
3778                dai->dapm.idle_bias_off = 1;
3779
3780        list_add(&dai->list, &dai_list);
3781
3782        mutex_unlock(&client_mutex);
3783
3784        dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3785
3786        return 0;
3787}
3788
3789/**
3790 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3791 *
3792 * @dai: DAI to unregister
3793 */
3794static void snd_soc_unregister_dai(struct device *dev)
3795{
3796        struct snd_soc_dai *dai;
3797
3798        list_for_each_entry(dai, &dai_list, list) {
3799                if (dev == dai->dev)
3800                        goto found;
3801        }
3802        return;
3803
3804found:
3805        mutex_lock(&client_mutex);
3806        list_del(&dai->list);
3807        mutex_unlock(&client_mutex);
3808
3809        dev_dbg(dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
3810        kfree(dai->name);
3811        kfree(dai);
3812}
3813
3814/**
3815 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3816 *
3817 * @dai: Array of DAIs to register
3818 * @count: Number of DAIs
3819 */
3820static int snd_soc_register_dais(struct device *dev,
3821                struct snd_soc_dai_driver *dai_drv, size_t count)
3822{
3823        struct snd_soc_codec *codec;
3824        struct snd_soc_dai *dai;
3825        int i, ret = 0;
3826
3827        dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
3828
3829        for (i = 0; i < count; i++) {
3830
3831                dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3832                if (dai == NULL) {
3833                        ret = -ENOMEM;
3834                        goto err;
3835                }
3836
3837                /* create DAI component name */
3838                dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3839                if (dai->name == NULL) {
3840                        kfree(dai);
3841                        ret = -EINVAL;
3842                        goto err;
3843                }
3844
3845                dai->dev = dev;
3846                dai->driver = &dai_drv[i];
3847                if (dai->driver->id)
3848                        dai->id = dai->driver->id;
3849                else
3850                        dai->id = i;
3851                dai->dapm.dev = dev;
3852                if (!dai->driver->ops)
3853                        dai->driver->ops = &null_dai_ops;
3854
3855                mutex_lock(&client_mutex);
3856
3857                list_for_each_entry(codec, &codec_list, list) {
3858                        if (codec->dev == dev) {
3859                                dev_dbg(dev,
3860                                        "ASoC: Mapped DAI %s to CODEC %s\n",
3861                                        dai->name, codec->name);
3862                                dai->codec = codec;
3863                                break;
3864                        }
3865                }
3866
3867                if (!dai->codec)
3868                        dai->dapm.idle_bias_off = 1;
3869
3870                list_add(&dai->list, &dai_list);
3871
3872                mutex_unlock(&client_mutex);
3873
3874                dev_dbg(dai->dev, "ASoC: Registered DAI '%s'\n", dai->name);
3875        }
3876
3877        return 0;
3878
3879err:
3880        for (i--; i >= 0; i--)
3881                snd_soc_unregister_dai(dev);
3882
3883        return ret;
3884}
3885
3886/**
3887 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3888 *
3889 * @dai: Array of DAIs to unregister
3890 * @count: Number of DAIs
3891 */
3892static void snd_soc_unregister_dais(struct device *dev, size_t count)
3893{
3894        int i;
3895
3896        for (i = 0; i < count; i++)
3897                snd_soc_unregister_dai(dev);
3898}
3899
3900/**
3901 * snd_soc_add_platform - Add a platform to the ASoC core
3902 * @dev: The parent device for the platform
3903 * @platform: The platform to add
3904 * @platform_driver: The driver for the platform
3905 */
3906int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3907                const struct snd_soc_platform_driver *platform_drv)
3908{
3909        /* create platform component name */
3910        platform->name = fmt_single_name(dev, &platform->id);
3911        if (platform->name == NULL)
3912                return -ENOMEM;
3913
3914        platform->dev = dev;
3915        platform->driver = platform_drv;
3916        platform->dapm.dev = dev;
3917        platform->dapm.platform = platform;
3918        platform->dapm.stream_event = platform_drv->stream_event;
3919        mutex_init(&platform->mutex);
3920
3921        mutex_lock(&client_mutex);
3922        list_add(&platform->list, &platform_list);
3923        mutex_unlock(&client_mutex);
3924
3925        dev_dbg(dev, "ASoC: Registered platform '%s'\n", platform->name);
3926
3927        return 0;
3928}
3929EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3930
3931/**
3932 * snd_soc_register_platform - Register a platform with the ASoC core
3933 *
3934 * @platform: platform to register
3935 */
3936int snd_soc_register_platform(struct device *dev,
3937                const struct snd_soc_platform_driver *platform_drv)
3938{
3939        struct snd_soc_platform *platform;
3940        int ret;
3941
3942        dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3943
3944        platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3945        if (platform == NULL)
3946                return -ENOMEM;
3947
3948        ret = snd_soc_add_platform(dev, platform, platform_drv);
3949        if (ret)
3950                kfree(platform);
3951
3952        return ret;
3953}
3954EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3955
3956/**
3957 * snd_soc_remove_platform - Remove a platform from the ASoC core
3958 * @platform: the platform to remove
3959 */
3960void snd_soc_remove_platform(struct snd_soc_platform *platform)
3961{
3962        mutex_lock(&client_mutex);
3963        list_del(&platform->list);
3964        mutex_unlock(&client_mutex);
3965
3966        dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3967                platform->name);
3968        kfree(platform->name);
3969}
3970EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3971
3972struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3973{
3974        struct snd_soc_platform *platform;
3975
3976        list_for_each_entry(platform, &platform_list, list) {
3977                if (dev == platform->dev)
3978                        return platform;
3979        }
3980
3981        return NULL;
3982}
3983EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3984
3985/**
3986 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3987 *
3988 * @platform: platform to unregister
3989 */
3990void snd_soc_unregister_platform(struct device *dev)
3991{
3992        struct snd_soc_platform *platform;
3993
3994        platform = snd_soc_lookup_platform(dev);
3995        if (!platform)
3996                return;
3997
3998        snd_soc_remove_platform(platform);
3999        kfree(platform);
4000}
4001EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
4002
4003static u64 codec_format_map[] = {
4004        SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
4005        SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
4006        SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
4007        SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
4008        SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
4009        SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
4010        SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4011        SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
4012        SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
4013        SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
4014        SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
4015        SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
4016        SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
4017        SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
4018        SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
4019        | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
4020};
4021
4022/* Fix up the DAI formats for endianness: codecs don't actually see
4023 * the endianness of the data but we're using the CPU format
4024 * definitions which do need to include endianness so we ensure that
4025 * codec DAIs always have both big and little endian variants set.
4026 */
4027static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
4028{
4029        int i;
4030
4031        for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
4032                if (stream->formats & codec_format_map[i])
4033                        stream->formats |= codec_format_map[i];
4034}
4035
4036/**
4037 * snd_soc_register_codec - Register a codec with the ASoC core
4038 *
4039 * @codec: codec to register
4040 */
4041int snd_soc_register_codec(struct device *dev,
4042                           const struct snd_soc_codec_driver *codec_drv,
4043                           struct snd_soc_dai_driver *dai_drv,
4044                           int num_dai)
4045{
4046        size_t reg_size;
4047        struct snd_soc_codec *codec;
4048        int ret, i;
4049
4050        dev_dbg(dev, "codec register %s\n", dev_name(dev));
4051
4052        codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
4053        if (codec == NULL)
4054                return -ENOMEM;
4055
4056        /* create CODEC component name */
4057        codec->name = fmt_single_name(dev, &codec->id);
4058        if (codec->name == NULL) {
4059                ret = -ENOMEM;
4060                goto fail_codec;
4061        }
4062
4063        if (codec_drv->compress_type)
4064                codec->compress_type = codec_drv->compress_type;
4065        else
4066                codec->compress_type = SND_SOC_FLAT_COMPRESSION;
4067
4068        codec->write = codec_drv->write;
4069        codec->read = codec_drv->read;
4070        codec->volatile_register = codec_drv->volatile_register;
4071        codec->readable_register = codec_drv->readable_register;
4072        codec->writable_register = codec_drv->writable_register;
4073        codec->ignore_pmdown_time = codec_drv->ignore_pmdown_time;
4074        codec->dapm.bias_level = SND_SOC_BIAS_OFF;
4075        codec->dapm.dev = dev;
4076        codec->dapm.codec = codec;
4077        codec->dapm.seq_notifier = codec_drv->seq_notifier;
4078        codec->dapm.stream_event = codec_drv->stream_event;
4079        codec->dev = dev;
4080        codec->driver = codec_drv;
4081        codec->num_dai = num_dai;
4082        mutex_init(&codec->mutex);
4083
4084        /* allocate CODEC register cache */
4085        if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
4086                reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
4087                codec->reg_size = reg_size;
4088                /* it is necessary to make a copy of the default register cache
4089                 * because in the case of using a compression type that requires
4090                 * the default register cache to be marked as the
4091                 * kernel might have freed the array by the time we initialize
4092                 * the cache.
4093                 */
4094                if (codec_drv->reg_cache_default) {
4095                        codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
4096                                                      reg_size, GFP_KERNEL);
4097                        if (!codec->reg_def_copy) {
4098                                ret = -ENOMEM;
4099                                goto fail_codec_name;
4100                        }
4101                }
4102        }
4103
4104        if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
4105                if (!codec->volatile_register)
4106                        codec->volatile_register = snd_soc_default_volatile_register;
4107                if (!codec->readable_register)
4108                        codec->readable_register = snd_soc_default_readable_register;
4109                if (!codec->writable_register)
4110                        codec->writable_register = snd_soc_default_writable_register;
4111        }
4112
4113        for (i = 0; i < num_dai; i++) {
4114                fixup_codec_formats(&dai_drv[i].playback);
4115                fixup_codec_formats(&dai_drv[i].capture);
4116        }
4117
4118        mutex_lock(&client_mutex);
4119        list_add(&codec->list, &codec_list);
4120        mutex_unlock(&client_mutex);
4121
4122        /* register any DAIs */
4123        ret = snd_soc_register_dais(dev, dai_drv, num_dai);
4124        if (ret < 0) {
4125                dev_err(codec->dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4126                goto fail_codec_name;
4127        }
4128
4129        dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", codec->name);
4130        return 0;
4131
4132fail_codec_name:
4133        mutex_lock(&client_mutex);
4134        list_del(&codec->list);
4135        mutex_unlock(&client_mutex);
4136
4137        kfree(codec->name);
4138fail_codec:
4139        kfree(codec);
4140        return ret;
4141}
4142EXPORT_SYMBOL_GPL(snd_soc_register_codec);
4143
4144/**
4145 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
4146 *
4147 * @codec: codec to unregister
4148 */
4149void snd_soc_unregister_codec(struct device *dev)
4150{
4151        struct snd_soc_codec *codec;
4152
4153        list_for_each_entry(codec, &codec_list, list) {
4154                if (dev == codec->dev)
4155                        goto found;
4156        }
4157        return;
4158
4159found:
4160        snd_soc_unregister_dais(dev, codec->num_dai);
4161
4162        mutex_lock(&client_mutex);
4163        list_del(&codec->list);
4164        mutex_unlock(&client_mutex);
4165
4166        dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", codec->name);
4167
4168        snd_soc_cache_exit(codec);
4169        kfree(codec->reg_def_copy);
4170        kfree(codec->name);
4171        kfree(codec);
4172}
4173EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
4174
4175
4176/**
4177 * snd_soc_register_component - Register a component with the ASoC core
4178 *
4179 */
4180int snd_soc_register_component(struct device *dev,
4181                         const struct snd_soc_component_driver *cmpnt_drv,
4182                         struct snd_soc_dai_driver *dai_drv,
4183                         int num_dai)
4184{
4185        struct snd_soc_component *cmpnt;
4186        int ret;
4187
4188        dev_dbg(dev, "component register %s\n", dev_name(dev));
4189
4190        cmpnt = devm_kzalloc(dev, sizeof(*cmpnt), GFP_KERNEL);
4191        if (!cmpnt) {
4192                dev_err(dev, "ASoC: Failed to allocate memory\n");
4193                return -ENOMEM;
4194        }
4195
4196        cmpnt->name = fmt_single_name(dev, &cmpnt->id);
4197        if (!cmpnt->name) {
4198                dev_err(dev, "ASoC: Failed to simplifying name\n");
4199                return -ENOMEM;
4200        }
4201
4202        cmpnt->dev      = dev;
4203        cmpnt->driver   = cmpnt_drv;
4204        cmpnt->num_dai  = num_dai;
4205
4206        /*
4207         * snd_soc_register_dai()  uses fmt_single_name(), and
4208         * snd_soc_register_dais() uses fmt_multiple_name()
4209         * for dai->name which is used for name based matching
4210         */
4211        if (1 == num_dai)
4212                ret = snd_soc_register_dai(dev, dai_drv);
4213        else
4214                ret = snd_soc_register_dais(dev, dai_drv, num_dai);
4215        if (ret < 0) {
4216                dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
4217                goto error_component_name;
4218        }
4219
4220        mutex_lock(&client_mutex);
4221        list_add(&cmpnt->list, &component_list);
4222        mutex_unlock(&client_mutex);
4223
4224        dev_dbg(cmpnt->dev, "ASoC: Registered component '%s'\n", cmpnt->name);
4225
4226        return ret;
4227
4228error_component_name:
4229        kfree(cmpnt->name);
4230
4231        return ret;
4232}
4233EXPORT_SYMBOL_GPL(snd_soc_register_component);
4234
4235/**
4236 * snd_soc_unregister_component - Unregister a component from the ASoC core
4237 *
4238 */
4239void snd_soc_unregister_component(struct device *dev)
4240{
4241        struct snd_soc_component *cmpnt;
4242
4243        list_for_each_entry(cmpnt, &component_list, list) {
4244                if (dev == cmpnt->dev)
4245                        goto found;
4246        }
4247        return;
4248
4249found:
4250        snd_soc_unregister_dais(dev, cmpnt->num_dai);
4251
4252        mutex_lock(&client_mutex);
4253        list_del(&cmpnt->list);
4254        mutex_unlock(&client_mutex);
4255
4256        dev_dbg(dev, "ASoC: Unregistered component '%s'\n", cmpnt->name);
4257        kfree(cmpnt->name);
4258}
4259EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
4260
4261/* Retrieve a card's name from device tree */
4262int snd_soc_of_parse_card_name(struct snd_soc_card *card,
4263                               const char *propname)
4264{
4265        struct device_node *np = card->dev->of_node;
4266        int ret;
4267
4268        ret = of_property_read_string_index(np, propname, 0, &card->name);
4269        /*
4270         * EINVAL means the property does not exist. This is fine providing
4271         * card->name was previously set, which is checked later in
4272         * snd_soc_register_card.
4273         */
4274        if (ret < 0 && ret != -EINVAL) {
4275                dev_err(card->dev,
4276                        "ASoC: Property '%s' could not be read: %d\n",
4277                        propname, ret);
4278                return ret;
4279        }
4280
4281        return 0;
4282}
4283EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
4284
4285int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4286                                   const char *propname)
4287{
4288        struct device_node *np = card->dev->of_node;
4289        int num_routes;
4290        struct snd_soc_dapm_route *routes;
4291        int i, ret;
4292
4293        num_routes = of_property_count_strings(np, propname);
4294        if (num_routes < 0 || num_routes & 1) {
4295                dev_err(card->dev,
4296                        "ASoC: Property '%s' does not exist or its length is not even\n",
4297                        propname);
4298                return -EINVAL;
4299        }
4300        num_routes /= 2;
4301        if (!num_routes) {
4302                dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4303                        propname);
4304                return -EINVAL;
4305        }
4306
4307        routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4308                              GFP_KERNEL);
4309        if (!routes) {
4310                dev_err(card->dev,
4311                        "ASoC: Could not allocate DAPM route table\n");
4312                return -EINVAL;
4313        }
4314
4315        for (i = 0; i < num_routes; i++) {
4316                ret = of_property_read_string_index(np, propname,
4317                        2 * i, &routes[i].sink);
4318                if (ret) {
4319                        dev_err(card->dev,
4320                                "ASoC: Property '%s' index %d could not be read: %d\n",
4321                                propname, 2 * i, ret);
4322                        return -EINVAL;
4323                }
4324                ret = of_property_read_string_index(np, propname,
4325                        (2 * i) + 1, &routes[i].source);
4326                if (ret) {
4327                        dev_err(card->dev,
4328                                "ASoC: Property '%s' index %d could not be read: %d\n",
4329                                propname, (2 * i) + 1, ret);
4330                        return -EINVAL;
4331                }
4332        }
4333
4334        card->num_dapm_routes = num_routes;
4335        card->dapm_routes = routes;
4336
4337        return 0;
4338}
4339EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4340
4341unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4342                                     const char *prefix)
4343{
4344        int ret, i;
4345        char prop[128];
4346        unsigned int format = 0;
4347        int bit, frame;
4348        const char *str;
4349        struct {
4350                char *name;
4351                unsigned int val;
4352        } of_fmt_table[] = {
4353                { "i2s",        SND_SOC_DAIFMT_I2S },
4354                { "right_j",    SND_SOC_DAIFMT_RIGHT_J },
4355                { "left_j",     SND_SOC_DAIFMT_LEFT_J },
4356                { "dsp_a",      SND_SOC_DAIFMT_DSP_A },
4357                { "dsp_b",      SND_SOC_DAIFMT_DSP_B },
4358                { "ac97",       SND_SOC_DAIFMT_AC97 },
4359                { "pdm",        SND_SOC_DAIFMT_PDM},
4360                { "msb",        SND_SOC_DAIFMT_MSB },
4361                { "lsb",        SND_SOC_DAIFMT_LSB },
4362        };
4363
4364        if (!prefix)
4365                prefix = "";
4366
4367        /*
4368         * check "[prefix]format = xxx"
4369         * SND_SOC_DAIFMT_FORMAT_MASK area
4370         */
4371        snprintf(prop, sizeof(prop), "%sformat", prefix);
4372        ret = of_property_read_string(np, prop, &str);
4373        if (ret == 0) {
4374                for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4375                        if (strcmp(str, of_fmt_table[i].name) == 0) {
4376                                format |= of_fmt_table[i].val;
4377                                break;
4378                        }
4379                }
4380        }
4381
4382        /*
4383         * check "[prefix]continuous-clock"
4384         * SND_SOC_DAIFMT_CLOCK_MASK area
4385         */
4386        snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4387        if (of_get_property(np, prop, NULL))
4388                format |= SND_SOC_DAIFMT_CONT;
4389        else
4390                format |= SND_SOC_DAIFMT_GATED;
4391
4392        /*
4393         * check "[prefix]bitclock-inversion"
4394         * check "[prefix]frame-inversion"
4395         * SND_SOC_DAIFMT_INV_MASK area
4396         */
4397        snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4398        bit = !!of_get_property(np, prop, NULL);
4399
4400        snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4401        frame = !!of_get_property(np, prop, NULL);
4402
4403        switch ((bit << 4) + frame) {
4404        case 0x11:
4405                format |= SND_SOC_DAIFMT_IB_IF;
4406                break;
4407        case 0x10:
4408                format |= SND_SOC_DAIFMT_IB_NF;
4409                break;
4410        case 0x01:
4411                format |= SND_SOC_DAIFMT_NB_IF;
4412                break;
4413        default:
4414                /* SND_SOC_DAIFMT_NB_NF is default */
4415                break;
4416        }
4417
4418        /*
4419         * check "[prefix]bitclock-master"
4420         * check "[prefix]frame-master"
4421         * SND_SOC_DAIFMT_MASTER_MASK area
4422         */
4423        snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4424        bit = !!of_get_property(np, prop, NULL);
4425
4426        snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4427        frame = !!of_get_property(np, prop, NULL);
4428
4429        switch ((bit << 4) + frame) {
4430        case 0x11:
4431                format |= SND_SOC_DAIFMT_CBM_CFM;
4432                break;
4433        case 0x10:
4434                format |= SND_SOC_DAIFMT_CBM_CFS;
4435                break;
4436        case 0x01:
4437                format |= SND_SOC_DAIFMT_CBS_CFM;
4438                break;
4439        default:
4440                format |= SND_SOC_DAIFMT_CBS_CFS;
4441                break;
4442        }
4443
4444        return format;
4445}
4446EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4447
4448static int __init snd_soc_init(void)
4449{
4450#ifdef CONFIG_DEBUG_FS
4451        snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
4452        if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
4453                pr_warn("ASoC: Failed to create debugfs directory\n");
4454                snd_soc_debugfs_root = NULL;
4455        }
4456
4457        if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
4458                                 &codec_list_fops))
4459                pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
4460
4461        if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
4462                                 &dai_list_fops))
4463                pr_warn("ASoC: Failed to create DAI list debugfs file\n");
4464
4465        if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
4466                                 &platform_list_fops))
4467                pr_warn("ASoC: Failed to create platform list debugfs file\n");
4468#endif
4469
4470        snd_soc_util_init();
4471
4472        return platform_driver_register(&soc_driver);
4473}
4474module_init(snd_soc_init);
4475
4476static void __exit snd_soc_exit(void)
4477{
4478        snd_soc_util_exit();
4479
4480#ifdef CONFIG_DEBUG_FS
4481        debugfs_remove_recursive(snd_soc_debugfs_root);
4482#endif
4483        platform_driver_unregister(&soc_driver);
4484}
4485module_exit(snd_soc_exit);
4486
4487/* Module information */
4488MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4489MODULE_DESCRIPTION("ALSA SoC Core");
4490MODULE_LICENSE("GPL");
4491MODULE_ALIAS("platform:soc-audio");
4492
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