linux/sound/soc/soc-core.c
<<
>>
Prefs
   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);
  61
  62/*
  63 * This is a timeout to do a DAPM powerdown after a stream is closed().
  64 * It can be used to eliminate pops between different playback streams, e.g.
  65 * between two audio tracks.
  66 */
  67static int pmdown_time = 5000;
  68module_param(pmdown_time, int, 0);
  69MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
  70
  71/* returns the minimum number of bytes needed to represent
  72 * a particular given value */
  73static int min_bytes_needed(unsigned long val)
  74{
  75        int c = 0;
  76        int i;
  77
  78        for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
  79                if (val & (1UL << i))
  80                        break;
  81        c = (sizeof val * 8) - c;
  82        if (!c || (c % 8))
  83                c = (c + 8) / 8;
  84        else
  85                c /= 8;
  86        return c;
  87}
  88
  89/* fill buf which is 'len' bytes with a formatted
  90 * string of the form 'reg: value\n' */
  91static int format_register_str(struct snd_soc_codec *codec,
  92                               unsigned int reg, char *buf, size_t len)
  93{
  94        int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
  95        int regsize = codec->driver->reg_word_size * 2;
  96        int ret;
  97        char tmpbuf[len + 1];
  98        char regbuf[regsize + 1];
  99
 100        /* since tmpbuf is allocated on the stack, warn the callers if they
 101         * try to abuse this function */
 102        WARN_ON(len > 63);
 103
 104        /* +2 for ': ' and + 1 for '\n' */
 105        if (wordsize + regsize + 2 + 1 != len)
 106                return -EINVAL;
 107
 108        ret = snd_soc_read(codec, reg);
 109        if (ret < 0) {
 110                memset(regbuf, 'X', regsize);
 111                regbuf[regsize] = '\0';
 112        } else {
 113                snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
 114        }
 115
 116        /* prepare the buffer */
 117        snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
 118        /* copy it back to the caller without the '\0' */
 119        memcpy(buf, tmpbuf, len);
 120
 121        return 0;
 122}
 123
 124/* codec register dump */
 125static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
 126                                  size_t count, loff_t pos)
 127{
 128        int i, step = 1;
 129        int wordsize, regsize;
 130        int len;
 131        size_t total = 0;
 132        loff_t p = 0;
 133
 134        wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
 135        regsize = codec->driver->reg_word_size * 2;
 136
 137        len = wordsize + regsize + 2 + 1;
 138
 139        if (!codec->driver->reg_cache_size)
 140                return 0;
 141
 142        if (codec->driver->reg_cache_step)
 143                step = codec->driver->reg_cache_step;
 144
 145        for (i = 0; i < codec->driver->reg_cache_size; i += step) {
 146                if (!snd_soc_codec_readable_register(codec, i))
 147                        continue;
 148                if (codec->driver->display_register) {
 149                        count += codec->driver->display_register(codec, buf + count,
 150                                                         PAGE_SIZE - count, i);
 151                } else {
 152                        /* only support larger than PAGE_SIZE bytes debugfs
 153                         * entries for the default case */
 154                        if (p >= pos) {
 155                                if (total + len >= count - 1)
 156                                        break;
 157                                format_register_str(codec, i, buf + total, len);
 158                                total += len;
 159                        }
 160                        p += len;
 161                }
 162        }
 163
 164        total = min(total, count - 1);
 165
 166        return total;
 167}
 168
 169static ssize_t codec_reg_show(struct device *dev,
 170        struct device_attribute *attr, char *buf)
 171{
 172        struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 173
 174        return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
 175}
 176
 177static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
 178
 179static ssize_t pmdown_time_show(struct device *dev,
 180                                struct device_attribute *attr, char *buf)
 181{
 182        struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 183
 184        return sprintf(buf, "%ld\n", rtd->pmdown_time);
 185}
 186
 187static ssize_t pmdown_time_set(struct device *dev,
 188                               struct device_attribute *attr,
 189                               const char *buf, size_t count)
 190{
 191        struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
 192        int ret;
 193
 194        ret = strict_strtol(buf, 10, &rtd->pmdown_time);
 195        if (ret)
 196                return ret;
 197
 198        return count;
 199}
 200
 201static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
 202
 203#ifdef CONFIG_DEBUG_FS
 204static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
 205                                   size_t count, loff_t *ppos)
 206{
 207        ssize_t ret;
 208        struct snd_soc_codec *codec = file->private_data;
 209        char *buf;
 210
 211        if (*ppos < 0 || !count)
 212                return -EINVAL;
 213
 214        buf = kmalloc(count, GFP_KERNEL);
 215        if (!buf)
 216                return -ENOMEM;
 217
 218        ret = soc_codec_reg_show(codec, buf, count, *ppos);
 219        if (ret >= 0) {
 220                if (copy_to_user(user_buf, buf, ret)) {
 221                        kfree(buf);
 222                        return -EFAULT;
 223                }
 224                *ppos += ret;
 225        }
 226
 227        kfree(buf);
 228        return ret;
 229}
 230
 231static ssize_t codec_reg_write_file(struct file *file,
 232                const char __user *user_buf, size_t count, loff_t *ppos)
 233{
 234        char buf[32];
 235        size_t buf_size;
 236        char *start = buf;
 237        unsigned long reg, value;
 238        struct snd_soc_codec *codec = file->private_data;
 239
 240        buf_size = min(count, (sizeof(buf)-1));
 241        if (copy_from_user(buf, user_buf, buf_size))
 242                return -EFAULT;
 243        buf[buf_size] = 0;
 244
 245        while (*start == ' ')
 246                start++;
 247        reg = simple_strtoul(start, &start, 16);
 248        while (*start == ' ')
 249                start++;
 250        if (strict_strtoul(start, 16, &value))
 251                return -EINVAL;
 252
 253        /* Userspace has been fiddling around behind the kernel's back */
 254        add_taint(TAINT_USER);
 255
 256        snd_soc_write(codec, reg, value);
 257        return buf_size;
 258}
 259
 260static const struct file_operations codec_reg_fops = {
 261        .open = simple_open,
 262        .read = codec_reg_read_file,
 263        .write = codec_reg_write_file,
 264        .llseek = default_llseek,
 265};
 266
 267static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 268{
 269        struct dentry *debugfs_card_root = codec->card->debugfs_card_root;
 270
 271        codec->debugfs_codec_root = debugfs_create_dir(codec->name,
 272                                                       debugfs_card_root);
 273        if (!codec->debugfs_codec_root) {
 274                dev_warn(codec->dev, "Failed to create codec debugfs directory\n");
 275                return;
 276        }
 277
 278        debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
 279                            &codec->cache_sync);
 280        debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
 281                            &codec->cache_only);
 282
 283        codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
 284                                                 codec->debugfs_codec_root,
 285                                                 codec, &codec_reg_fops);
 286        if (!codec->debugfs_reg)
 287                dev_warn(codec->dev, "Failed to create codec register debugfs file\n");
 288
 289        snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
 290}
 291
 292static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 293{
 294        debugfs_remove_recursive(codec->debugfs_codec_root);
 295}
 296
 297static void soc_init_platform_debugfs(struct snd_soc_platform *platform)
 298{
 299        struct dentry *debugfs_card_root = platform->card->debugfs_card_root;
 300
 301        platform->debugfs_platform_root = debugfs_create_dir(platform->name,
 302                                                       debugfs_card_root);
 303        if (!platform->debugfs_platform_root) {
 304                dev_warn(platform->dev,
 305                        "Failed to create platform debugfs directory\n");
 306                return;
 307        }
 308
 309        snd_soc_dapm_debugfs_init(&platform->dapm,
 310                platform->debugfs_platform_root);
 311}
 312
 313static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
 314{
 315        debugfs_remove_recursive(platform->debugfs_platform_root);
 316}
 317
 318static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
 319                                    size_t count, loff_t *ppos)
 320{
 321        char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 322        ssize_t len, ret = 0;
 323        struct snd_soc_codec *codec;
 324
 325        if (!buf)
 326                return -ENOMEM;
 327
 328        list_for_each_entry(codec, &codec_list, list) {
 329                len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 330                               codec->name);
 331                if (len >= 0)
 332                        ret += len;
 333                if (ret > PAGE_SIZE) {
 334                        ret = PAGE_SIZE;
 335                        break;
 336                }
 337        }
 338
 339        if (ret >= 0)
 340                ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 341
 342        kfree(buf);
 343
 344        return ret;
 345}
 346
 347static const struct file_operations codec_list_fops = {
 348        .read = codec_list_read_file,
 349        .llseek = default_llseek,/* read accesses f_pos */
 350};
 351
 352static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
 353                                  size_t count, loff_t *ppos)
 354{
 355        char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 356        ssize_t len, ret = 0;
 357        struct snd_soc_dai *dai;
 358
 359        if (!buf)
 360                return -ENOMEM;
 361
 362        list_for_each_entry(dai, &dai_list, list) {
 363                len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
 364                if (len >= 0)
 365                        ret += len;
 366                if (ret > PAGE_SIZE) {
 367                        ret = PAGE_SIZE;
 368                        break;
 369                }
 370        }
 371
 372        ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 373
 374        kfree(buf);
 375
 376        return ret;
 377}
 378
 379static const struct file_operations dai_list_fops = {
 380        .read = dai_list_read_file,
 381        .llseek = default_llseek,/* read accesses f_pos */
 382};
 383
 384static ssize_t platform_list_read_file(struct file *file,
 385                                       char __user *user_buf,
 386                                       size_t count, loff_t *ppos)
 387{
 388        char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 389        ssize_t len, ret = 0;
 390        struct snd_soc_platform *platform;
 391
 392        if (!buf)
 393                return -ENOMEM;
 394
 395        list_for_each_entry(platform, &platform_list, list) {
 396                len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
 397                               platform->name);
 398                if (len >= 0)
 399                        ret += len;
 400                if (ret > PAGE_SIZE) {
 401                        ret = PAGE_SIZE;
 402                        break;
 403                }
 404        }
 405
 406        ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 407
 408        kfree(buf);
 409
 410        return ret;
 411}
 412
 413static const struct file_operations platform_list_fops = {
 414        .read = platform_list_read_file,
 415        .llseek = default_llseek,/* read accesses f_pos */
 416};
 417
 418static void soc_init_card_debugfs(struct snd_soc_card *card)
 419{
 420        card->debugfs_card_root = debugfs_create_dir(card->name,
 421                                                     snd_soc_debugfs_root);
 422        if (!card->debugfs_card_root) {
 423                dev_warn(card->dev,
 424                         "ASoC: Failed to create card debugfs directory\n");
 425                return;
 426        }
 427
 428        card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
 429                                                    card->debugfs_card_root,
 430                                                    &card->pop_time);
 431        if (!card->debugfs_pop_time)
 432                dev_warn(card->dev,
 433                       "Failed to create pop time debugfs file\n");
 434}
 435
 436static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 437{
 438        debugfs_remove_recursive(card->debugfs_card_root);
 439}
 440
 441#else
 442
 443static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
 444{
 445}
 446
 447static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
 448{
 449}
 450
 451static inline void soc_init_platform_debugfs(struct snd_soc_platform *platform)
 452{
 453}
 454
 455static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
 456{
 457}
 458
 459static inline void soc_init_card_debugfs(struct snd_soc_card *card)
 460{
 461}
 462
 463static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
 464{
 465}
 466#endif
 467
 468struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
 469                const char *dai_link, int stream)
 470{
 471        int i;
 472
 473        for (i = 0; i < card->num_links; i++) {
 474                if (card->rtd[i].dai_link->no_pcm &&
 475                        !strcmp(card->rtd[i].dai_link->name, dai_link))
 476                        return card->rtd[i].pcm->streams[stream].substream;
 477        }
 478        dev_dbg(card->dev, "failed to find dai link %s\n", dai_link);
 479        return NULL;
 480}
 481EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
 482
 483struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
 484                const char *dai_link)
 485{
 486        int i;
 487
 488        for (i = 0; i < card->num_links; i++) {
 489                if (!strcmp(card->rtd[i].dai_link->name, dai_link))
 490                        return &card->rtd[i];
 491        }
 492        dev_dbg(card->dev, "failed to find rtd %s\n", dai_link);
 493        return NULL;
 494}
 495EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
 496
 497#ifdef CONFIG_SND_SOC_AC97_BUS
 498/* unregister ac97 codec */
 499static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
 500{
 501        if (codec->ac97->dev.bus)
 502                device_unregister(&codec->ac97->dev);
 503        return 0;
 504}
 505
 506/* stop no dev release warning */
 507static void soc_ac97_device_release(struct device *dev){}
 508
 509/* register ac97 codec to bus */
 510static int soc_ac97_dev_register(struct snd_soc_codec *codec)
 511{
 512        int err;
 513
 514        codec->ac97->dev.bus = &ac97_bus_type;
 515        codec->ac97->dev.parent = codec->card->dev;
 516        codec->ac97->dev.release = soc_ac97_device_release;
 517
 518        dev_set_name(&codec->ac97->dev, "%d-%d:%s",
 519                     codec->card->snd_card->number, 0, codec->name);
 520        err = device_register(&codec->ac97->dev);
 521        if (err < 0) {
 522                snd_printk(KERN_ERR "Can't register ac97 bus\n");
 523                codec->ac97->dev.bus = NULL;
 524                return err;
 525        }
 526        return 0;
 527}
 528#endif
 529
 530#ifdef CONFIG_PM_SLEEP
 531/* powers down audio subsystem for suspend */
 532int snd_soc_suspend(struct device *dev)
 533{
 534        struct snd_soc_card *card = dev_get_drvdata(dev);
 535        struct snd_soc_codec *codec;
 536        int i;
 537
 538        /* If the initialization of this soc device failed, there is no codec
 539         * associated with it. Just bail out in this case.
 540         */
 541        if (list_empty(&card->codec_dev_list))
 542                return 0;
 543
 544        /* Due to the resume being scheduled into a workqueue we could
 545        * suspend before that's finished - wait for it to complete.
 546         */
 547        snd_power_lock(card->snd_card);
 548        snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
 549        snd_power_unlock(card->snd_card);
 550
 551        /* we're going to block userspace touching us until resume completes */
 552        snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
 553
 554        /* mute any active DACs */
 555        for (i = 0; i < card->num_rtd; i++) {
 556                struct snd_soc_dai *dai = card->rtd[i].codec_dai;
 557                struct snd_soc_dai_driver *drv = dai->driver;
 558
 559                if (card->rtd[i].dai_link->ignore_suspend)
 560                        continue;
 561
 562                if (drv->ops->digital_mute && dai->playback_active)
 563                        drv->ops->digital_mute(dai, 1);
 564        }
 565
 566        /* suspend all pcms */
 567        for (i = 0; i < card->num_rtd; i++) {
 568                if (card->rtd[i].dai_link->ignore_suspend)
 569                        continue;
 570
 571                snd_pcm_suspend_all(card->rtd[i].pcm);
 572        }
 573
 574        if (card->suspend_pre)
 575                card->suspend_pre(card);
 576
 577        for (i = 0; i < card->num_rtd; i++) {
 578                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 579                struct snd_soc_platform *platform = card->rtd[i].platform;
 580
 581                if (card->rtd[i].dai_link->ignore_suspend)
 582                        continue;
 583
 584                if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
 585                        cpu_dai->driver->suspend(cpu_dai);
 586                if (platform->driver->suspend && !platform->suspended) {
 587                        platform->driver->suspend(cpu_dai);
 588                        platform->suspended = 1;
 589                }
 590        }
 591
 592        /* close any waiting streams and save state */
 593        for (i = 0; i < card->num_rtd; i++) {
 594                flush_delayed_work(&card->rtd[i].delayed_work);
 595                card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
 596        }
 597
 598        for (i = 0; i < card->num_rtd; i++) {
 599
 600                if (card->rtd[i].dai_link->ignore_suspend)
 601                        continue;
 602
 603                snd_soc_dapm_stream_event(&card->rtd[i],
 604                                          SNDRV_PCM_STREAM_PLAYBACK,
 605                                          SND_SOC_DAPM_STREAM_SUSPEND);
 606
 607                snd_soc_dapm_stream_event(&card->rtd[i],
 608                                          SNDRV_PCM_STREAM_CAPTURE,
 609                                          SND_SOC_DAPM_STREAM_SUSPEND);
 610        }
 611
 612        /* Recheck all analogue paths too */
 613        dapm_mark_io_dirty(&card->dapm);
 614        snd_soc_dapm_sync(&card->dapm);
 615
 616        /* suspend all CODECs */
 617        list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 618                /* If there are paths active then the CODEC will be held with
 619                 * bias _ON and should not be suspended. */
 620                if (!codec->suspended && codec->driver->suspend) {
 621                        switch (codec->dapm.bias_level) {
 622                        case SND_SOC_BIAS_STANDBY:
 623                                /*
 624                                 * If the CODEC is capable of idle
 625                                 * bias off then being in STANDBY
 626                                 * means it's doing something,
 627                                 * otherwise fall through.
 628                                 */
 629                                if (codec->dapm.idle_bias_off) {
 630                                        dev_dbg(codec->dev,
 631                                                "idle_bias_off CODEC on over suspend\n");
 632                                        break;
 633                                }
 634                        case SND_SOC_BIAS_OFF:
 635                                codec->driver->suspend(codec);
 636                                codec->suspended = 1;
 637                                codec->cache_sync = 1;
 638                                if (codec->using_regmap)
 639                                        regcache_mark_dirty(codec->control_data);
 640                                break;
 641                        default:
 642                                dev_dbg(codec->dev, "CODEC is on over suspend\n");
 643                                break;
 644                        }
 645                }
 646        }
 647
 648        for (i = 0; i < card->num_rtd; i++) {
 649                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 650
 651                if (card->rtd[i].dai_link->ignore_suspend)
 652                        continue;
 653
 654                if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
 655                        cpu_dai->driver->suspend(cpu_dai);
 656        }
 657
 658        if (card->suspend_post)
 659                card->suspend_post(card);
 660
 661        return 0;
 662}
 663EXPORT_SYMBOL_GPL(snd_soc_suspend);
 664
 665/* deferred resume work, so resume can complete before we finished
 666 * setting our codec back up, which can be very slow on I2C
 667 */
 668static void soc_resume_deferred(struct work_struct *work)
 669{
 670        struct snd_soc_card *card =
 671                        container_of(work, struct snd_soc_card, deferred_resume_work);
 672        struct snd_soc_codec *codec;
 673        int i;
 674
 675        /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
 676         * so userspace apps are blocked from touching us
 677         */
 678
 679        dev_dbg(card->dev, "starting resume work\n");
 680
 681        /* Bring us up into D2 so that DAPM starts enabling things */
 682        snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
 683
 684        if (card->resume_pre)
 685                card->resume_pre(card);
 686
 687        /* resume AC97 DAIs */
 688        for (i = 0; i < card->num_rtd; i++) {
 689                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 690
 691                if (card->rtd[i].dai_link->ignore_suspend)
 692                        continue;
 693
 694                if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
 695                        cpu_dai->driver->resume(cpu_dai);
 696        }
 697
 698        list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 699                /* If the CODEC was idle over suspend then it will have been
 700                 * left with bias OFF or STANDBY and suspended so we must now
 701                 * resume.  Otherwise the suspend was suppressed.
 702                 */
 703                if (codec->driver->resume && codec->suspended) {
 704                        switch (codec->dapm.bias_level) {
 705                        case SND_SOC_BIAS_STANDBY:
 706                        case SND_SOC_BIAS_OFF:
 707                                codec->driver->resume(codec);
 708                                codec->suspended = 0;
 709                                break;
 710                        default:
 711                                dev_dbg(codec->dev, "CODEC was on over suspend\n");
 712                                break;
 713                        }
 714                }
 715        }
 716
 717        for (i = 0; i < card->num_rtd; i++) {
 718
 719                if (card->rtd[i].dai_link->ignore_suspend)
 720                        continue;
 721
 722                snd_soc_dapm_stream_event(&card->rtd[i],
 723                                          SNDRV_PCM_STREAM_PLAYBACK,
 724                                          SND_SOC_DAPM_STREAM_RESUME);
 725
 726                snd_soc_dapm_stream_event(&card->rtd[i],
 727                                          SNDRV_PCM_STREAM_CAPTURE,
 728                                          SND_SOC_DAPM_STREAM_RESUME);
 729        }
 730
 731        /* unmute any active DACs */
 732        for (i = 0; i < card->num_rtd; i++) {
 733                struct snd_soc_dai *dai = card->rtd[i].codec_dai;
 734                struct snd_soc_dai_driver *drv = dai->driver;
 735
 736                if (card->rtd[i].dai_link->ignore_suspend)
 737                        continue;
 738
 739                if (drv->ops->digital_mute && dai->playback_active)
 740                        drv->ops->digital_mute(dai, 0);
 741        }
 742
 743        for (i = 0; i < card->num_rtd; i++) {
 744                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 745                struct snd_soc_platform *platform = card->rtd[i].platform;
 746
 747                if (card->rtd[i].dai_link->ignore_suspend)
 748                        continue;
 749
 750                if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
 751                        cpu_dai->driver->resume(cpu_dai);
 752                if (platform->driver->resume && platform->suspended) {
 753                        platform->driver->resume(cpu_dai);
 754                        platform->suspended = 0;
 755                }
 756        }
 757
 758        if (card->resume_post)
 759                card->resume_post(card);
 760
 761        dev_dbg(card->dev, "resume work completed\n");
 762
 763        /* userspace can access us now we are back as we were before */
 764        snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
 765
 766        /* Recheck all analogue paths too */
 767        dapm_mark_io_dirty(&card->dapm);
 768        snd_soc_dapm_sync(&card->dapm);
 769}
 770
 771/* powers up audio subsystem after a suspend */
 772int snd_soc_resume(struct device *dev)
 773{
 774        struct snd_soc_card *card = dev_get_drvdata(dev);
 775        int i, ac97_control = 0;
 776
 777        /* If the initialization of this soc device failed, there is no codec
 778         * associated with it. Just bail out in this case.
 779         */
 780        if (list_empty(&card->codec_dev_list))
 781                return 0;
 782
 783        /* AC97 devices might have other drivers hanging off them so
 784         * need to resume immediately.  Other drivers don't have that
 785         * problem and may take a substantial amount of time to resume
 786         * due to I/O costs and anti-pop so handle them out of line.
 787         */
 788        for (i = 0; i < card->num_rtd; i++) {
 789                struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
 790                ac97_control |= cpu_dai->driver->ac97_control;
 791        }
 792        if (ac97_control) {
 793                dev_dbg(dev, "Resuming AC97 immediately\n");
 794                soc_resume_deferred(&card->deferred_resume_work);
 795        } else {
 796                dev_dbg(dev, "Scheduling resume work\n");
 797                if (!schedule_work(&card->deferred_resume_work))
 798                        dev_err(dev, "resume work item may be lost\n");
 799        }
 800
 801        return 0;
 802}
 803EXPORT_SYMBOL_GPL(snd_soc_resume);
 804#else
 805#define snd_soc_suspend NULL
 806#define snd_soc_resume NULL
 807#endif
 808
 809static const struct snd_soc_dai_ops null_dai_ops = {
 810};
 811
 812static int soc_bind_dai_link(struct snd_soc_card *card, int num)
 813{
 814        struct snd_soc_dai_link *dai_link = &card->dai_link[num];
 815        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 816        struct snd_soc_codec *codec;
 817        struct snd_soc_platform *platform;
 818        struct snd_soc_dai *codec_dai, *cpu_dai;
 819        const char *platform_name;
 820
 821        dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
 822
 823        /* Find CPU DAI from registered DAIs*/
 824        list_for_each_entry(cpu_dai, &dai_list, list) {
 825                if (dai_link->cpu_of_node &&
 826                    (cpu_dai->dev->of_node != dai_link->cpu_of_node))
 827                        continue;
 828                if (dai_link->cpu_name &&
 829                    strcmp(dev_name(cpu_dai->dev), dai_link->cpu_name))
 830                        continue;
 831                if (dai_link->cpu_dai_name &&
 832                    strcmp(cpu_dai->name, dai_link->cpu_dai_name))
 833                        continue;
 834
 835                rtd->cpu_dai = cpu_dai;
 836        }
 837
 838        if (!rtd->cpu_dai) {
 839                dev_err(card->dev, "CPU DAI %s not registered\n",
 840                        dai_link->cpu_dai_name);
 841                return -EPROBE_DEFER;
 842        }
 843
 844        /* Find CODEC from registered CODECs */
 845        list_for_each_entry(codec, &codec_list, list) {
 846                if (dai_link->codec_of_node) {
 847                        if (codec->dev->of_node != dai_link->codec_of_node)
 848                                continue;
 849                } else {
 850                        if (strcmp(codec->name, dai_link->codec_name))
 851                                continue;
 852                }
 853
 854                rtd->codec = codec;
 855
 856                /*
 857                 * CODEC found, so find CODEC DAI from registered DAIs from
 858                 * this CODEC
 859                 */
 860                list_for_each_entry(codec_dai, &dai_list, list) {
 861                        if (codec->dev == codec_dai->dev &&
 862                                !strcmp(codec_dai->name,
 863                                        dai_link->codec_dai_name)) {
 864
 865                                rtd->codec_dai = codec_dai;
 866                        }
 867                }
 868
 869                if (!rtd->codec_dai) {
 870                        dev_err(card->dev, "CODEC DAI %s not registered\n",
 871                                dai_link->codec_dai_name);
 872                        return -EPROBE_DEFER;
 873                }
 874        }
 875
 876        if (!rtd->codec) {
 877                dev_err(card->dev, "CODEC %s not registered\n",
 878                        dai_link->codec_name);
 879                return -EPROBE_DEFER;
 880        }
 881
 882        /* if there's no platform we match on the empty platform */
 883        platform_name = dai_link->platform_name;
 884        if (!platform_name && !dai_link->platform_of_node)
 885                platform_name = "snd-soc-dummy";
 886
 887        /* find one from the set of registered platforms */
 888        list_for_each_entry(platform, &platform_list, list) {
 889                if (dai_link->platform_of_node) {
 890                        if (platform->dev->of_node !=
 891                            dai_link->platform_of_node)
 892                                continue;
 893                } else {
 894                        if (strcmp(platform->name, platform_name))
 895                                continue;
 896                }
 897
 898                rtd->platform = platform;
 899        }
 900        if (!rtd->platform) {
 901                dev_err(card->dev, "platform %s not registered\n",
 902                        dai_link->platform_name);
 903                return -EPROBE_DEFER;
 904        }
 905
 906        card->num_rtd++;
 907
 908        return 0;
 909}
 910
 911static int soc_remove_platform(struct snd_soc_platform *platform)
 912{
 913        int ret;
 914
 915        if (platform->driver->remove) {
 916                ret = platform->driver->remove(platform);
 917                if (ret < 0)
 918                        pr_err("asoc: failed to remove %s: %d\n",
 919                                platform->name, ret);
 920        }
 921
 922        /* Make sure all DAPM widgets are freed */
 923        snd_soc_dapm_free(&platform->dapm);
 924
 925        soc_cleanup_platform_debugfs(platform);
 926        platform->probed = 0;
 927        list_del(&platform->card_list);
 928        module_put(platform->dev->driver->owner);
 929
 930        return 0;
 931}
 932
 933static void soc_remove_codec(struct snd_soc_codec *codec)
 934{
 935        int err;
 936
 937        if (codec->driver->remove) {
 938                err = codec->driver->remove(codec);
 939                if (err < 0)
 940                        dev_err(codec->dev,
 941                                "asoc: failed to remove %s: %d\n",
 942                                codec->name, err);
 943        }
 944
 945        /* Make sure all DAPM widgets are freed */
 946        snd_soc_dapm_free(&codec->dapm);
 947
 948        soc_cleanup_codec_debugfs(codec);
 949        codec->probed = 0;
 950        list_del(&codec->card_list);
 951        module_put(codec->dev->driver->owner);
 952}
 953
 954static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
 955{
 956        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
 957        struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
 958        int err;
 959
 960        /* unregister the rtd device */
 961        if (rtd->dev_registered) {
 962                device_remove_file(rtd->dev, &dev_attr_pmdown_time);
 963                device_remove_file(rtd->dev, &dev_attr_codec_reg);
 964                device_unregister(rtd->dev);
 965                rtd->dev_registered = 0;
 966        }
 967
 968        /* remove the CODEC DAI */
 969        if (codec_dai && codec_dai->probed &&
 970                        codec_dai->driver->remove_order == order) {
 971                if (codec_dai->driver->remove) {
 972                        err = codec_dai->driver->remove(codec_dai);
 973                        if (err < 0)
 974                                pr_err("asoc: failed to remove %s: %d\n",
 975                                                        codec_dai->name, err);
 976                }
 977                codec_dai->probed = 0;
 978                list_del(&codec_dai->card_list);
 979        }
 980
 981        /* remove the cpu_dai */
 982        if (cpu_dai && cpu_dai->probed &&
 983                        cpu_dai->driver->remove_order == order) {
 984                if (cpu_dai->driver->remove) {
 985                        err = cpu_dai->driver->remove(cpu_dai);
 986                        if (err < 0)
 987                                pr_err("asoc: failed to remove %s: %d\n",
 988                                                        cpu_dai->name, err);
 989                }
 990                cpu_dai->probed = 0;
 991                list_del(&cpu_dai->card_list);
 992
 993                if (!cpu_dai->codec) {
 994                        snd_soc_dapm_free(&cpu_dai->dapm);
 995                        module_put(cpu_dai->dev->driver->owner);
 996                }
 997        }
 998}
 999
1000static void soc_remove_link_components(struct snd_soc_card *card, int num,
1001                                       int order)
1002{
1003        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1004        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1005        struct snd_soc_dai *codec_dai = rtd->codec_dai;
1006        struct snd_soc_platform *platform = rtd->platform;
1007        struct snd_soc_codec *codec;
1008
1009        /* remove the platform */
1010        if (platform && platform->probed &&
1011            platform->driver->remove_order == order) {
1012                soc_remove_platform(platform);
1013        }
1014
1015        /* remove the CODEC-side CODEC */
1016        if (codec_dai) {
1017                codec = codec_dai->codec;
1018                if (codec && codec->probed &&
1019                    codec->driver->remove_order == order)
1020                        soc_remove_codec(codec);
1021        }
1022
1023        /* remove any CPU-side CODEC */
1024        if (cpu_dai) {
1025                codec = cpu_dai->codec;
1026                if (codec && codec->probed &&
1027                    codec->driver->remove_order == order)
1028                        soc_remove_codec(codec);
1029        }
1030}
1031
1032static void soc_remove_dai_links(struct snd_soc_card *card)
1033{
1034        int dai, order;
1035
1036        for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1037                        order++) {
1038                for (dai = 0; dai < card->num_rtd; dai++)
1039                        soc_remove_link_dais(card, dai, order);
1040        }
1041
1042        for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1043                        order++) {
1044                for (dai = 0; dai < card->num_rtd; dai++)
1045                        soc_remove_link_components(card, dai, order);
1046        }
1047
1048        card->num_rtd = 0;
1049}
1050
1051static void soc_set_name_prefix(struct snd_soc_card *card,
1052                                struct snd_soc_codec *codec)
1053{
1054        int i;
1055
1056        if (card->codec_conf == NULL)
1057                return;
1058
1059        for (i = 0; i < card->num_configs; i++) {
1060                struct snd_soc_codec_conf *map = &card->codec_conf[i];
1061                if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
1062                        codec->name_prefix = map->name_prefix;
1063                        break;
1064                }
1065        }
1066}
1067
1068static int soc_probe_codec(struct snd_soc_card *card,
1069                           struct snd_soc_codec *codec)
1070{
1071        int ret = 0;
1072        const struct snd_soc_codec_driver *driver = codec->driver;
1073        struct snd_soc_dai *dai;
1074
1075        codec->card = card;
1076        codec->dapm.card = card;
1077        soc_set_name_prefix(card, codec);
1078
1079        if (!try_module_get(codec->dev->driver->owner))
1080                return -ENODEV;
1081
1082        soc_init_codec_debugfs(codec);
1083
1084        if (driver->dapm_widgets)
1085                snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
1086                                          driver->num_dapm_widgets);
1087
1088        /* Create DAPM widgets for each DAI stream */
1089        list_for_each_entry(dai, &dai_list, list) {
1090                if (dai->dev != codec->dev)
1091                        continue;
1092
1093                snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
1094        }
1095
1096        codec->dapm.idle_bias_off = driver->idle_bias_off;
1097
1098        if (driver->probe) {
1099                ret = driver->probe(codec);
1100                if (ret < 0) {
1101                        dev_err(codec->dev,
1102                                "asoc: failed to probe CODEC %s: %d\n",
1103                                codec->name, ret);
1104                        goto err_probe;
1105                }
1106        }
1107
1108        /* If the driver didn't set I/O up try regmap */
1109        if (!codec->write && dev_get_regmap(codec->dev, NULL))
1110                snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
1111
1112        if (driver->controls)
1113                snd_soc_add_codec_controls(codec, driver->controls,
1114                                     driver->num_controls);
1115        if (driver->dapm_routes)
1116                snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
1117                                        driver->num_dapm_routes);
1118
1119        /* mark codec as probed and add to card codec list */
1120        codec->probed = 1;
1121        list_add(&codec->card_list, &card->codec_dev_list);
1122        list_add(&codec->dapm.list, &card->dapm_list);
1123
1124        return 0;
1125
1126err_probe:
1127        soc_cleanup_codec_debugfs(codec);
1128        module_put(codec->dev->driver->owner);
1129
1130        return ret;
1131}
1132
1133static int soc_probe_platform(struct snd_soc_card *card,
1134                           struct snd_soc_platform *platform)
1135{
1136        int ret = 0;
1137        const struct snd_soc_platform_driver *driver = platform->driver;
1138        struct snd_soc_dai *dai;
1139
1140        platform->card = card;
1141        platform->dapm.card = card;
1142
1143        if (!try_module_get(platform->dev->driver->owner))
1144                return -ENODEV;
1145
1146        soc_init_platform_debugfs(platform);
1147
1148        if (driver->dapm_widgets)
1149                snd_soc_dapm_new_controls(&platform->dapm,
1150                        driver->dapm_widgets, driver->num_dapm_widgets);
1151
1152        /* Create DAPM widgets for each DAI stream */
1153        list_for_each_entry(dai, &dai_list, list) {
1154                if (dai->dev != platform->dev)
1155                        continue;
1156
1157                snd_soc_dapm_new_dai_widgets(&platform->dapm, dai);
1158        }
1159
1160        platform->dapm.idle_bias_off = 1;
1161
1162        if (driver->probe) {
1163                ret = driver->probe(platform);
1164                if (ret < 0) {
1165                        dev_err(platform->dev,
1166                                "asoc: failed to probe platform %s: %d\n",
1167                                platform->name, ret);
1168                        goto err_probe;
1169                }
1170        }
1171
1172        if (driver->controls)
1173                snd_soc_add_platform_controls(platform, driver->controls,
1174                                     driver->num_controls);
1175        if (driver->dapm_routes)
1176                snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
1177                                        driver->num_dapm_routes);
1178
1179        /* mark platform as probed and add to card platform list */
1180        platform->probed = 1;
1181        list_add(&platform->card_list, &card->platform_dev_list);
1182        list_add(&platform->dapm.list, &card->dapm_list);
1183
1184        return 0;
1185
1186err_probe:
1187        soc_cleanup_platform_debugfs(platform);
1188        module_put(platform->dev->driver->owner);
1189
1190        return ret;
1191}
1192
1193static void rtd_release(struct device *dev)
1194{
1195        kfree(dev);
1196}
1197
1198static int soc_post_component_init(struct snd_soc_card *card,
1199                                   struct snd_soc_codec *codec,
1200                                   int num, int dailess)
1201{
1202        struct snd_soc_dai_link *dai_link = NULL;
1203        struct snd_soc_aux_dev *aux_dev = NULL;
1204        struct snd_soc_pcm_runtime *rtd;
1205        const char *temp, *name;
1206        int ret = 0;
1207
1208        if (!dailess) {
1209                dai_link = &card->dai_link[num];
1210                rtd = &card->rtd[num];
1211                name = dai_link->name;
1212        } else {
1213                aux_dev = &card->aux_dev[num];
1214                rtd = &card->rtd_aux[num];
1215                name = aux_dev->name;
1216        }
1217        rtd->card = card;
1218
1219        /* Make sure all DAPM widgets are instantiated */
1220        snd_soc_dapm_new_widgets(&codec->dapm);
1221
1222        /* machine controls, routes and widgets are not prefixed */
1223        temp = codec->name_prefix;
1224        codec->name_prefix = NULL;
1225
1226        /* do machine specific initialization */
1227        if (!dailess && dai_link->init)
1228                ret = dai_link->init(rtd);
1229        else if (dailess && aux_dev->init)
1230                ret = aux_dev->init(&codec->dapm);
1231        if (ret < 0) {
1232                dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
1233                return ret;
1234        }
1235        codec->name_prefix = temp;
1236
1237        /* register the rtd device */
1238        rtd->codec = codec;
1239
1240        rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1241        if (!rtd->dev)
1242                return -ENOMEM;
1243        device_initialize(rtd->dev);
1244        rtd->dev->parent = card->dev;
1245        rtd->dev->release = rtd_release;
1246        rtd->dev->init_name = name;
1247        dev_set_drvdata(rtd->dev, rtd);
1248        mutex_init(&rtd->pcm_mutex);
1249        INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1250        INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1251        INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1252        INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1253        ret = device_add(rtd->dev);
1254        if (ret < 0) {
1255                dev_err(card->dev,
1256                        "asoc: failed to register runtime device: %d\n", ret);
1257                return ret;
1258        }
1259        rtd->dev_registered = 1;
1260
1261        /* add DAPM sysfs entries for this codec */
1262        ret = snd_soc_dapm_sys_add(rtd->dev);
1263        if (ret < 0)
1264                dev_err(codec->dev,
1265                        "asoc: failed to add codec dapm sysfs entries: %d\n",
1266                        ret);
1267
1268        /* add codec sysfs entries */
1269        ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1270        if (ret < 0)
1271                dev_err(codec->dev,
1272                        "asoc: failed to add codec sysfs files: %d\n", ret);
1273
1274#ifdef CONFIG_DEBUG_FS
1275        /* add DPCM sysfs entries */
1276        if (!dailess && !dai_link->dynamic)
1277                goto out;
1278
1279        ret = soc_dpcm_debugfs_add(rtd);
1280        if (ret < 0)
1281                dev_err(rtd->dev, "asoc: failed to add dpcm sysfs entries: %d\n", ret);
1282
1283out:
1284#endif
1285        return 0;
1286}
1287
1288static int soc_probe_link_components(struct snd_soc_card *card, int num,
1289                                     int order)
1290{
1291        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1292        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1293        struct snd_soc_dai *codec_dai = rtd->codec_dai;
1294        struct snd_soc_platform *platform = rtd->platform;
1295        int ret;
1296
1297        /* probe the CPU-side component, if it is a CODEC */
1298        if (cpu_dai->codec &&
1299            !cpu_dai->codec->probed &&
1300            cpu_dai->codec->driver->probe_order == order) {
1301                ret = soc_probe_codec(card, cpu_dai->codec);
1302                if (ret < 0)
1303                        return ret;
1304        }
1305
1306        /* probe the CODEC-side component */
1307        if (!codec_dai->codec->probed &&
1308            codec_dai->codec->driver->probe_order == order) {
1309                ret = soc_probe_codec(card, codec_dai->codec);
1310                if (ret < 0)
1311                        return ret;
1312        }
1313
1314        /* probe the platform */
1315        if (!platform->probed &&
1316            platform->driver->probe_order == order) {
1317                ret = soc_probe_platform(card, platform);
1318                if (ret < 0)
1319                        return ret;
1320        }
1321
1322        return 0;
1323}
1324
1325static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1326{
1327        struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1328        struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1329        struct snd_soc_codec *codec = rtd->codec;
1330        struct snd_soc_platform *platform = rtd->platform;
1331        struct snd_soc_dai *codec_dai = rtd->codec_dai;
1332        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1333        struct snd_soc_dapm_widget *play_w, *capture_w;
1334        int ret;
1335
1336        dev_dbg(card->dev, "probe %s dai link %d late %d\n",
1337                        card->name, num, order);
1338
1339        /* config components */
1340        cpu_dai->platform = platform;
1341        codec_dai->card = card;
1342        cpu_dai->card = card;
1343
1344        /* set default power off timeout */
1345        rtd->pmdown_time = pmdown_time;
1346
1347        /* probe the cpu_dai */
1348        if (!cpu_dai->probed &&
1349                        cpu_dai->driver->probe_order == order) {
1350                if (!cpu_dai->codec) {
1351                        cpu_dai->dapm.card = card;
1352                        if (!try_module_get(cpu_dai->dev->driver->owner))
1353                                return -ENODEV;
1354
1355                        list_add(&cpu_dai->dapm.list, &card->dapm_list);
1356                        snd_soc_dapm_new_dai_widgets(&cpu_dai->dapm, cpu_dai);
1357                }
1358
1359                if (cpu_dai->driver->probe) {
1360                        ret = cpu_dai->driver->probe(cpu_dai);
1361                        if (ret < 0) {
1362                                pr_err("asoc: failed to probe CPU DAI %s: %d\n",
1363                                                        cpu_dai->name, ret);
1364                                module_put(cpu_dai->dev->driver->owner);
1365                                return ret;
1366                        }
1367                }
1368                cpu_dai->probed = 1;
1369                /* mark cpu_dai as probed and add to card dai list */
1370                list_add(&cpu_dai->card_list, &card->dai_dev_list);
1371        }
1372
1373        /* probe the CODEC DAI */
1374        if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1375                if (codec_dai->driver->probe) {
1376                        ret = codec_dai->driver->probe(codec_dai);
1377                        if (ret < 0) {
1378                                pr_err("asoc: failed to probe CODEC DAI %s: %d\n",
1379                                                        codec_dai->name, ret);
1380                                return ret;
1381                        }
1382                }
1383
1384                /* mark codec_dai as probed and add to card dai list */
1385                codec_dai->probed = 1;
1386                list_add(&codec_dai->card_list, &card->dai_dev_list);
1387        }
1388
1389        /* complete DAI probe during last probe */
1390        if (order != SND_SOC_COMP_ORDER_LAST)
1391                return 0;
1392
1393        ret = soc_post_component_init(card, codec, num, 0);
1394        if (ret)
1395                return ret;
1396
1397        ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1398        if (ret < 0)
1399                pr_warn("asoc: failed to add pmdown_time sysfs:%d\n", ret);
1400
1401        if (cpu_dai->driver->compress_dai) {
1402                /*create compress_device"*/
1403                ret = soc_new_compress(rtd, num);
1404                if (ret < 0) {
1405                        pr_err("asoc: can't create compress %s\n",
1406                                         dai_link->stream_name);
1407                        return ret;
1408                }
1409        } else {
1410
1411                if (!dai_link->params) {
1412                        /* create the pcm */
1413                        ret = soc_new_pcm(rtd, num);
1414                        if (ret < 0) {
1415                                pr_err("asoc: can't create pcm %s :%d\n",
1416                                       dai_link->stream_name, ret);
1417                                return ret;
1418                        }
1419                } else {
1420                        /* link the DAI widgets */
1421                        play_w = codec_dai->playback_widget;
1422                        capture_w = cpu_dai->capture_widget;
1423                        if (play_w && capture_w) {
1424                                ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1425                                                   capture_w, play_w);
1426                                if (ret != 0) {
1427                                        dev_err(card->dev, "Can't link %s to %s: %d\n",
1428                                                play_w->name, capture_w->name, ret);
1429                                        return ret;
1430                                }
1431                        }
1432
1433                        play_w = cpu_dai->playback_widget;
1434                        capture_w = codec_dai->capture_widget;
1435                        if (play_w && capture_w) {
1436                                ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1437                                                   capture_w, play_w);
1438                                if (ret != 0) {
1439                                        dev_err(card->dev, "Can't link %s to %s: %d\n",
1440                                                play_w->name, capture_w->name, ret);
1441                                        return ret;
1442                                }
1443                        }
1444                }
1445        }
1446
1447        /* add platform data for AC97 devices */
1448        if (rtd->codec_dai->driver->ac97_control)
1449                snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);
1450
1451        return 0;
1452}
1453
1454#ifdef CONFIG_SND_SOC_AC97_BUS
1455static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
1456{
1457        int ret;
1458
1459        /* Only instantiate AC97 if not already done by the adaptor
1460         * for the generic AC97 subsystem.
1461         */
1462        if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1463                /*
1464                 * It is possible that the AC97 device is already registered to
1465                 * the device subsystem. This happens when the device is created
1466                 * via snd_ac97_mixer(). Currently only SoC codec that does so
1467                 * is the generic AC97 glue but others migh emerge.
1468                 *
1469                 * In those cases we don't try to register the device again.
1470                 */
1471                if (!rtd->codec->ac97_created)
1472                        return 0;
1473
1474                ret = soc_ac97_dev_register(rtd->codec);
1475                if (ret < 0) {
1476                        pr_err("asoc: AC97 device register failed:%d\n", ret);
1477                        return ret;
1478                }
1479
1480                rtd->codec->ac97_registered = 1;
1481        }
1482        return 0;
1483}
1484
1485static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
1486{
1487        if (codec->ac97_registered) {
1488                soc_ac97_dev_unregister(codec);
1489                codec->ac97_registered = 0;
1490        }
1491}
1492#endif
1493
1494static int soc_check_aux_dev(struct snd_soc_card *card, int num)
1495{
1496        struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1497        struct snd_soc_codec *codec;
1498
1499        /* find CODEC from registered CODECs*/
1500        list_for_each_entry(codec, &codec_list, list) {
1501                if (!strcmp(codec->name, aux_dev->codec_name))
1502                        return 0;
1503        }
1504
1505        dev_err(card->dev, "%s not registered\n", aux_dev->codec_name);
1506
1507        return -EPROBE_DEFER;
1508}
1509
1510static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1511{
1512        struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1513        struct snd_soc_codec *codec;
1514        int ret = -ENODEV;
1515
1516        /* find CODEC from registered CODECs*/
1517        list_for_each_entry(codec, &codec_list, list) {
1518                if (!strcmp(codec->name, aux_dev->codec_name)) {
1519                        if (codec->probed) {
1520                                dev_err(codec->dev,
1521                                        "asoc: codec already probed");
1522                                ret = -EBUSY;
1523                                goto out;
1524                        }
1525                        goto found;
1526                }
1527        }
1528        /* codec not found */
1529        dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
1530        return -EPROBE_DEFER;
1531
1532found:
1533        ret = soc_probe_codec(card, codec);
1534        if (ret < 0)
1535                return ret;
1536
1537        ret = soc_post_component_init(card, codec, num, 1);
1538
1539out:
1540        return ret;
1541}
1542
1543static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1544{
1545        struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1546        struct snd_soc_codec *codec = rtd->codec;
1547
1548        /* unregister the rtd device */
1549        if (rtd->dev_registered) {
1550                device_remove_file(rtd->dev, &dev_attr_codec_reg);
1551                device_del(rtd->dev);
1552                rtd->dev_registered = 0;
1553        }
1554
1555        if (codec && codec->probed)
1556                soc_remove_codec(codec);
1557}
1558
1559static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
1560                                    enum snd_soc_compress_type compress_type)
1561{
1562        int ret;
1563
1564        if (codec->cache_init)
1565                return 0;
1566
1567        /* override the compress_type if necessary */
1568        if (compress_type && codec->compress_type != compress_type)
1569                codec->compress_type = compress_type;
1570        ret = snd_soc_cache_init(codec);
1571        if (ret < 0) {
1572                dev_err(codec->dev, "Failed to set cache compression type: %d\n",
1573                        ret);
1574                return ret;
1575        }
1576        codec->cache_init = 1;
1577        return 0;
1578}
1579
1580static int snd_soc_instantiate_card(struct snd_soc_card *card)
1581{
1582        struct snd_soc_codec *codec;
1583        struct snd_soc_codec_conf *codec_conf;
1584        enum snd_soc_compress_type compress_type;
1585        struct snd_soc_dai_link *dai_link;
1586        int ret, i, order, dai_fmt;
1587
1588        mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1589
1590        /* bind DAIs */
1591        for (i = 0; i < card->num_links; i++) {
1592                ret = soc_bind_dai_link(card, i);
1593                if (ret != 0)
1594                        goto base_error;
1595        }
1596
1597        /* check aux_devs too */
1598        for (i = 0; i < card->num_aux_devs; i++) {
1599                ret = soc_check_aux_dev(card, i);
1600                if (ret != 0)
1601                        goto base_error;
1602        }
1603
1604        /* initialize the register cache for each available codec */
1605        list_for_each_entry(codec, &codec_list, list) {
1606                if (codec->cache_init)
1607                        continue;
1608                /* by default we don't override the compress_type */
1609                compress_type = 0;
1610                /* check to see if we need to override the compress_type */
1611                for (i = 0; i < card->num_configs; ++i) {
1612                        codec_conf = &card->codec_conf[i];
1613                        if (!strcmp(codec->name, codec_conf->dev_name)) {
1614                                compress_type = codec_conf->compress_type;
1615                                if (compress_type && compress_type
1616                                    != codec->compress_type)
1617                                        break;
1618                        }
1619                }
1620                ret = snd_soc_init_codec_cache(codec, compress_type);
1621                if (ret < 0)
1622                        goto base_error;
1623        }
1624
1625        /* card bind complete so register a sound card */
1626        ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1627                        card->owner, 0, &card->snd_card);
1628        if (ret < 0) {
1629                pr_err("asoc: can't create sound card for card %s: %d\n",
1630                        card->name, ret);
1631                goto base_error;
1632        }
1633        card->snd_card->dev = card->dev;
1634
1635        card->dapm.bias_level = SND_SOC_BIAS_OFF;
1636        card->dapm.dev = card->dev;
1637        card->dapm.card = card;
1638        list_add(&card->dapm.list, &card->dapm_list);
1639
1640#ifdef CONFIG_DEBUG_FS
1641        snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1642#endif
1643
1644#ifdef CONFIG_PM_SLEEP
1645        /* deferred resume work */
1646        INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1647#endif
1648
1649        if (card->dapm_widgets)
1650                snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1651                                          card->num_dapm_widgets);
1652
1653        /* initialise the sound card only once */
1654        if (card->probe) {
1655                ret = card->probe(card);
1656                if (ret < 0)
1657                        goto card_probe_error;
1658        }
1659
1660        /* probe all components used by DAI links on this card */
1661        for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1662                        order++) {
1663                for (i = 0; i < card->num_links; i++) {
1664                        ret = soc_probe_link_components(card, i, order);
1665                        if (ret < 0) {
1666                                pr_err("asoc: failed to instantiate card %s: %d\n",
1667                                       card->name, ret);
1668                                goto probe_dai_err;
1669                        }
1670                }
1671        }
1672
1673        /* probe all DAI links on this card */
1674        for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1675                        order++) {
1676                for (i = 0; i < card->num_links; i++) {
1677                        ret = soc_probe_link_dais(card, i, order);
1678                        if (ret < 0) {
1679                                pr_err("asoc: failed to instantiate card %s: %d\n",
1680                                       card->name, ret);
1681                                goto probe_dai_err;
1682                        }
1683                }
1684        }
1685
1686        for (i = 0; i < card->num_aux_devs; i++) {
1687                ret = soc_probe_aux_dev(card, i);
1688                if (ret < 0) {
1689                        pr_err("asoc: failed to add auxiliary devices %s: %d\n",
1690                               card->name, ret);
1691                        goto probe_aux_dev_err;
1692                }
1693        }
1694
1695        snd_soc_dapm_link_dai_widgets(card);
1696
1697        if (card->controls)
1698                snd_soc_add_card_controls(card, card->controls, card->num_controls);
1699
1700        if (card->dapm_routes)
1701                snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1702                                        card->num_dapm_routes);
1703
1704        snd_soc_dapm_new_widgets(&card->dapm);
1705
1706        for (i = 0; i < card->num_links; i++) {
1707                dai_link = &card->dai_link[i];
1708                dai_fmt = dai_link->dai_fmt;
1709
1710                if (dai_fmt) {
1711                        ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1712                                                  dai_fmt);
1713                        if (ret != 0 && ret != -ENOTSUPP)
1714                                dev_warn(card->rtd[i].codec_dai->dev,
1715                                         "Failed to set DAI format: %d\n",
1716                                         ret);
1717                }
1718
1719                /* If this is a regular CPU link there will be a platform */
1720                if (dai_fmt &&
1721                    (dai_link->platform_name || dai_link->platform_of_node)) {
1722                        ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1723                                                  dai_fmt);
1724                        if (ret != 0 && ret != -ENOTSUPP)
1725                                dev_warn(card->rtd[i].cpu_dai->dev,
1726                                         "Failed to set DAI format: %d\n",
1727                                         ret);
1728                } else if (dai_fmt) {
1729                        /* Flip the polarity for the "CPU" end */
1730                        dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
1731                        switch (dai_link->dai_fmt &
1732                                SND_SOC_DAIFMT_MASTER_MASK) {
1733                        case SND_SOC_DAIFMT_CBM_CFM:
1734                                dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1735                                break;
1736                        case SND_SOC_DAIFMT_CBM_CFS:
1737                                dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1738                                break;
1739                        case SND_SOC_DAIFMT_CBS_CFM:
1740                                dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1741                                break;
1742                        case SND_SOC_DAIFMT_CBS_CFS:
1743                                dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1744                                break;
1745                        }
1746
1747                        ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1748                                                  dai_fmt);
1749                        if (ret != 0 && ret != -ENOTSUPP)
1750                                dev_warn(card->rtd[i].cpu_dai->dev,
1751                                         "Failed to set DAI format: %d\n",
1752                                         ret);
1753                }
1754        }
1755
1756        snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1757                 "%s", card->name);
1758        snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1759                 "%s", card->long_name ? card->long_name : card->name);
1760        snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1761                 "%s", card->driver_name ? card->driver_name : card->name);
1762        for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1763                switch (card->snd_card->driver[i]) {
1764                case '_':
1765                case '-':
1766                case '\0':
1767                        break;
1768                default:
1769                        if (!isalnum(card->snd_card->driver[i]))
1770                                card->snd_card->driver[i] = '_';
1771                        break;
1772                }
1773        }
1774
1775        if (card->late_probe) {
1776                ret = card->late_probe(card);
1777                if (ret < 0) {
1778                        dev_err(card->dev, "%s late_probe() failed: %d\n",
1779                                card->name, ret);
1780                        goto probe_aux_dev_err;
1781                }
1782        }
1783
1784        snd_soc_dapm_new_widgets(&card->dapm);
1785
1786        if (card->fully_routed)
1787                list_for_each_entry(codec, &card->codec_dev_list, card_list)
1788                        snd_soc_dapm_auto_nc_codec_pins(codec);
1789
1790        ret = snd_card_register(card->snd_card);
1791        if (ret < 0) {
1792                pr_err("asoc: failed to register soundcard for %s: %d\n",
1793                                                        card->name, ret);
1794                goto probe_aux_dev_err;
1795        }
1796
1797#ifdef CONFIG_SND_SOC_AC97_BUS
1798        /* register any AC97 codecs */
1799        for (i = 0; i < card->num_rtd; i++) {
1800                ret = soc_register_ac97_dai_link(&card->rtd[i]);
1801                if (ret < 0) {
1802                        pr_err("asoc: failed to register AC97 %s: %d\n",
1803                                                        card->name, ret);
1804                        while (--i >= 0)
1805                                soc_unregister_ac97_dai_link(card->rtd[i].codec);
1806                        goto probe_aux_dev_err;
1807                }
1808        }
1809#endif
1810
1811        card->instantiated = 1;
1812        snd_soc_dapm_sync(&card->dapm);
1813        mutex_unlock(&card->mutex);
1814
1815        return 0;
1816
1817probe_aux_dev_err:
1818        for (i = 0; i < card->num_aux_devs; i++)
1819                soc_remove_aux_dev(card, i);
1820
1821probe_dai_err:
1822        soc_remove_dai_links(card);
1823
1824card_probe_error:
1825        if (card->remove)
1826                card->remove(card);
1827
1828        snd_card_free(card->snd_card);
1829
1830base_error:
1831        mutex_unlock(&card->mutex);
1832
1833        return ret;
1834}
1835
1836/* probes a new socdev */
1837static int soc_probe(struct platform_device *pdev)
1838{
1839        struct snd_soc_card *card = platform_get_drvdata(pdev);
1840
1841        /*
1842         * no card, so machine driver should be registering card
1843         * we should not be here in that case so ret error
1844         */
1845        if (!card)
1846                return -EINVAL;
1847
1848        dev_warn(&pdev->dev,
1849                 "ASoC machine %s should use snd_soc_register_card()\n",
1850                 card->name);
1851
1852        /* Bodge while we unpick instantiation */
1853        card->dev = &pdev->dev;
1854
1855        return snd_soc_register_card(card);
1856}
1857
1858static int soc_cleanup_card_resources(struct snd_soc_card *card)
1859{
1860        int i;
1861
1862        /* make sure any delayed work runs */
1863        for (i = 0; i < card->num_rtd; i++) {
1864                struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1865                flush_delayed_work(&rtd->delayed_work);
1866        }
1867
1868        /* remove auxiliary devices */
1869        for (i = 0; i < card->num_aux_devs; i++)
1870                soc_remove_aux_dev(card, i);
1871
1872        /* remove and free each DAI */
1873        soc_remove_dai_links(card);
1874
1875        soc_cleanup_card_debugfs(card);
1876
1877        /* remove the card */
1878        if (card->remove)
1879                card->remove(card);
1880
1881        snd_soc_dapm_free(&card->dapm);
1882
1883        snd_card_free(card->snd_card);
1884        return 0;
1885
1886}
1887
1888/* removes a socdev */
1889static int soc_remove(struct platform_device *pdev)
1890{
1891        struct snd_soc_card *card = platform_get_drvdata(pdev);
1892
1893        snd_soc_unregister_card(card);
1894        return 0;
1895}
1896
1897int snd_soc_poweroff(struct device *dev)
1898{
1899        struct snd_soc_card *card = dev_get_drvdata(dev);
1900        int i;
1901
1902        if (!card->instantiated)
1903                return 0;
1904
1905        /* Flush out pmdown_time work - we actually do want to run it
1906         * now, we're shutting down so no imminent restart. */
1907        for (i = 0; i < card->num_rtd; i++) {
1908                struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1909                flush_delayed_work(&rtd->delayed_work);
1910        }
1911
1912        snd_soc_dapm_shutdown(card);
1913
1914        return 0;
1915}
1916EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1917
1918const struct dev_pm_ops snd_soc_pm_ops = {
1919        .suspend = snd_soc_suspend,
1920        .resume = snd_soc_resume,
1921        .freeze = snd_soc_suspend,
1922        .thaw = snd_soc_resume,
1923        .poweroff = snd_soc_poweroff,
1924        .restore = snd_soc_resume,
1925};
1926EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1927
1928/* ASoC platform driver */
1929static struct platform_driver soc_driver = {
1930        .driver         = {
1931                .name           = "soc-audio",
1932                .owner          = THIS_MODULE,
1933                .pm             = &snd_soc_pm_ops,
1934        },
1935        .probe          = soc_probe,
1936        .remove         = soc_remove,
1937};
1938
1939/**
1940 * snd_soc_codec_volatile_register: Report if a register is volatile.
1941 *
1942 * @codec: CODEC to query.
1943 * @reg: Register to query.
1944 *
1945 * Boolean function indiciating if a CODEC register is volatile.
1946 */
1947int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
1948                                    unsigned int reg)
1949{
1950        if (codec->volatile_register)
1951                return codec->volatile_register(codec, reg);
1952        else
1953                return 0;
1954}
1955EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);
1956
1957/**
1958 * snd_soc_codec_readable_register: Report if a register is readable.
1959 *
1960 * @codec: CODEC to query.
1961 * @reg: Register to query.
1962 *
1963 * Boolean function indicating if a CODEC register is readable.
1964 */
1965int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
1966                                    unsigned int reg)
1967{
1968        if (codec->readable_register)
1969                return codec->readable_register(codec, reg);
1970        else
1971                return 1;
1972}
1973EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);
1974
1975/**
1976 * snd_soc_codec_writable_register: Report if a register is writable.
1977 *
1978 * @codec: CODEC to query.
1979 * @reg: Register to query.
1980 *
1981 * Boolean function indicating if a CODEC register is writable.
1982 */
1983int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
1984                                    unsigned int reg)
1985{
1986        if (codec->writable_register)
1987                return codec->writable_register(codec, reg);
1988        else
1989                return 1;
1990}
1991EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
1992
1993int snd_soc_platform_read(struct snd_soc_platform *platform,
1994                                        unsigned int reg)
1995{
1996        unsigned int ret;
1997
1998        if (!platform->driver->read) {
1999                dev_err(platform->dev, "platform has no read back\n");
2000                return -1;
2001        }
2002
2003        ret = platform->driver->read(platform, reg);
2004        dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
2005        trace_snd_soc_preg_read(platform, reg, ret);
2006
2007        return ret;
2008}
2009EXPORT_SYMBOL_GPL(snd_soc_platform_read);
2010
2011int snd_soc_platform_write(struct snd_soc_platform *platform,
2012                                         unsigned int reg, unsigned int val)
2013{
2014        if (!platform->driver->write) {
2015                dev_err(platform->dev, "platform has no write back\n");
2016                return -1;
2017        }
2018
2019        dev_dbg(platform->dev, "write %x = %x\n", reg, val);
2020        trace_snd_soc_preg_write(platform, reg, val);
2021        return platform->driver->write(platform, reg, val);
2022}
2023EXPORT_SYMBOL_GPL(snd_soc_platform_write);
2024
2025/**
2026 * snd_soc_new_ac97_codec - initailise AC97 device
2027 * @codec: audio codec
2028 * @ops: AC97 bus operations
2029 * @num: AC97 codec number
2030 *
2031 * Initialises AC97 codec resources for use by ad-hoc devices only.
2032 */
2033int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
2034        struct snd_ac97_bus_ops *ops, int num)
2035{
2036        mutex_lock(&codec->mutex);
2037
2038        codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
2039        if (codec->ac97 == NULL) {
2040                mutex_unlock(&codec->mutex);
2041                return -ENOMEM;
2042        }
2043
2044        codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
2045        if (codec->ac97->bus == NULL) {
2046                kfree(codec->ac97);
2047                codec->ac97 = NULL;
2048                mutex_unlock(&codec->mutex);
2049                return -ENOMEM;
2050        }
2051
2052        codec->ac97->bus->ops = ops;
2053        codec->ac97->num = num;
2054
2055        /*
2056         * Mark the AC97 device to be created by us. This way we ensure that the
2057         * device will be registered with the device subsystem later on.
2058         */
2059        codec->ac97_created = 1;
2060
2061        mutex_unlock(&codec->mutex);
2062        return 0;
2063}
2064EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);
2065
2066/**
2067 * snd_soc_free_ac97_codec - free AC97 codec device
2068 * @codec: audio codec
2069 *
2070 * Frees AC97 codec device resources.
2071 */
2072void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
2073{
2074        mutex_lock(&codec->mutex);
2075#ifdef CONFIG_SND_SOC_AC97_BUS
2076        soc_unregister_ac97_dai_link(codec);
2077#endif
2078        kfree(codec->ac97->bus);
2079        kfree(codec->ac97);
2080        codec->ac97 = NULL;
2081        codec->ac97_created = 0;
2082        mutex_unlock(&codec->mutex);
2083}
2084EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);
2085
2086unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
2087{
2088        unsigned int ret;
2089
2090        ret = codec->read(codec, reg);
2091        dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2092        trace_snd_soc_reg_read(codec, reg, ret);
2093
2094        return ret;
2095}
2096EXPORT_SYMBOL_GPL(snd_soc_read);
2097
2098unsigned int snd_soc_write(struct snd_soc_codec *codec,
2099                           unsigned int reg, unsigned int val)
2100{
2101        dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2102        trace_snd_soc_reg_write(codec, reg, val);
2103        return codec->write(codec, reg, val);
2104}
2105EXPORT_SYMBOL_GPL(snd_soc_write);
2106
2107unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
2108                                    unsigned int reg, const void *data, size_t len)
2109{
2110        return codec->bulk_write_raw(codec, reg, data, len);
2111}
2112EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);
2113
2114/**
2115 * snd_soc_update_bits - update codec register bits
2116 * @codec: audio codec
2117 * @reg: codec register
2118 * @mask: register mask
2119 * @value: new value
2120 *
2121 * Writes new register value.
2122 *
2123 * Returns 1 for change, 0 for no change, or negative error code.
2124 */
2125int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2126                                unsigned int mask, unsigned int value)
2127{
2128        bool change;
2129        unsigned int old, new;
2130        int ret;
2131
2132        if (codec->using_regmap) {
2133                ret = regmap_update_bits_check(codec->control_data, reg,
2134                                               mask, value, &change);
2135        } else {
2136                ret = snd_soc_read(codec, reg);
2137                if (ret < 0)
2138                        return ret;
2139
2140                old = ret;
2141                new = (old & ~mask) | (value & mask);
2142                change = old != new;
2143                if (change)
2144                        ret = snd_soc_write(codec, reg, new);
2145        }
2146
2147        if (ret < 0)
2148                return ret;
2149
2150        return change;
2151}
2152EXPORT_SYMBOL_GPL(snd_soc_update_bits);
2153
2154/**
2155 * snd_soc_update_bits_locked - update codec register bits
2156 * @codec: audio codec
2157 * @reg: codec register
2158 * @mask: register mask
2159 * @value: new value
2160 *
2161 * Writes new register value, and takes the codec mutex.
2162 *
2163 * Returns 1 for change else 0.
2164 */
2165int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
2166                               unsigned short reg, unsigned int mask,
2167                               unsigned int value)
2168{
2169        int change;
2170
2171        mutex_lock(&codec->mutex);
2172        change = snd_soc_update_bits(codec, reg, mask, value);
2173        mutex_unlock(&codec->mutex);
2174
2175        return change;
2176}
2177EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2178
2179/**
2180 * snd_soc_test_bits - test register for change
2181 * @codec: audio codec
2182 * @reg: codec register
2183 * @mask: register mask
2184 * @value: new value
2185 *
2186 * Tests a register with a new value and checks if the new value is
2187 * different from the old value.
2188 *
2189 * Returns 1 for change else 0.
2190 */
2191int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2192                                unsigned int mask, unsigned int value)
2193{
2194        int change;
2195        unsigned int old, new;
2196
2197        old = snd_soc_read(codec, reg);
2198        new = (old & ~mask) | value;
2199        change = old != new;
2200
2201        return change;
2202}
2203EXPORT_SYMBOL_GPL(snd_soc_test_bits);
2204
2205/**
2206 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
2207 * @substream: the pcm substream
2208 * @hw: the hardware parameters
2209 *
2210 * Sets the substream runtime hardware parameters.
2211 */
2212int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
2213        const struct snd_pcm_hardware *hw)
2214{
2215        struct snd_pcm_runtime *runtime = substream->runtime;
2216        runtime->hw.info = hw->info;
2217        runtime->hw.formats = hw->formats;
2218        runtime->hw.period_bytes_min = hw->period_bytes_min;
2219        runtime->hw.period_bytes_max = hw->period_bytes_max;
2220        runtime->hw.periods_min = hw->periods_min;
2221        runtime->hw.periods_max = hw->periods_max;
2222        runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
2223        runtime->hw.fifo_size = hw->fifo_size;
2224        return 0;
2225}
2226EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
2227
2228/**
2229 * snd_soc_cnew - create new control
2230 * @_template: control template
2231 * @data: control private data
2232 * @long_name: control long name
2233 * @prefix: control name prefix
2234 *
2235 * Create a new mixer control from a template control.
2236 *
2237 * Returns 0 for success, else error.
2238 */
2239struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2240                                  void *data, const char *long_name,
2241                                  const char *prefix)
2242{
2243        struct snd_kcontrol_new template;
2244        struct snd_kcontrol *kcontrol;
2245        char *name = NULL;
2246        int name_len;
2247
2248        memcpy(&template, _template, sizeof(template));
2249        template.index = 0;
2250
2251        if (!long_name)
2252                long_name = template.name;
2253
2254        if (prefix) {
2255                name_len = strlen(long_name) + strlen(prefix) + 2;
2256                name = kmalloc(name_len, GFP_KERNEL);
2257                if (!name)
2258                        return NULL;
2259
2260                snprintf(name, name_len, "%s %s", prefix, long_name);
2261
2262                template.name = name;
2263        } else {
2264                template.name = long_name;
2265        }
2266
2267        kcontrol = snd_ctl_new1(&template, data);
2268
2269        kfree(name);
2270
2271        return kcontrol;
2272}
2273EXPORT_SYMBOL_GPL(snd_soc_cnew);
2274
2275static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2276        const struct snd_kcontrol_new *controls, int num_controls,
2277        const char *prefix, void *data)
2278{
2279        int err, i;
2280
2281        for (i = 0; i < num_controls; i++) {
2282                const struct snd_kcontrol_new *control = &controls[i];
2283                err = snd_ctl_add(card, snd_soc_cnew(control, data,
2284                                                     control->name, prefix));
2285                if (err < 0) {
2286                        dev_err(dev, "Failed to add %s: %d\n", control->name, err);
2287                        return err;
2288                }
2289        }
2290
2291        return 0;
2292}
2293
2294/**
2295 * snd_soc_add_codec_controls - add an array of controls to a codec.
2296 * Convenience function to add a list of controls. Many codecs were
2297 * duplicating this code.
2298 *
2299 * @codec: codec to add controls to
2300 * @controls: array of controls to add
2301 * @num_controls: number of elements in the array
2302 *
2303 * Return 0 for success, else error.
2304 */
2305int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2306        const struct snd_kcontrol_new *controls, int num_controls)
2307{
2308        struct snd_card *card = codec->card->snd_card;
2309
2310        return snd_soc_add_controls(card, codec->dev, controls, num_controls,
2311                        codec->name_prefix, codec);
2312}
2313EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2314
2315/**
2316 * snd_soc_add_platform_controls - add an array of controls to a platform.
2317 * Convenience function to add a list of controls.
2318 *
2319 * @platform: platform to add controls to
2320 * @controls: array of controls to add
2321 * @num_controls: number of elements in the array
2322 *
2323 * Return 0 for success, else error.
2324 */
2325int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2326        const struct snd_kcontrol_new *controls, int num_controls)
2327{
2328        struct snd_card *card = platform->card->snd_card;
2329
2330        return snd_soc_add_controls(card, platform->dev, controls, num_controls,
2331                        NULL, platform);
2332}
2333EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2334
2335/**
2336 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2337 * Convenience function to add a list of controls.
2338 *
2339 * @soc_card: SoC card to add controls to
2340 * @controls: array of controls to add
2341 * @num_controls: number of elements in the array
2342 *
2343 * Return 0 for success, else error.
2344 */
2345int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2346        const struct snd_kcontrol_new *controls, int num_controls)
2347{
2348        struct snd_card *card = soc_card->snd_card;
2349
2350        return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2351                        NULL, soc_card);
2352}
2353EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2354
2355/**
2356 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2357 * Convienience function to add a list of controls.
2358 *
2359 * @dai: DAI to add controls to
2360 * @controls: array of controls to add
2361 * @num_controls: number of elements in the array
2362 *
2363 * Return 0 for success, else error.
2364 */
2365int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2366        const struct snd_kcontrol_new *controls, int num_controls)
2367{
2368        struct snd_card *card = dai->card->snd_card;
2369
2370        return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2371                        NULL, dai);
2372}
2373EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2374
2375/**
2376 * snd_soc_info_enum_double - enumerated double mixer info callback
2377 * @kcontrol: mixer control
2378 * @uinfo: control element information
2379 *
2380 * Callback to provide information about a double enumerated
2381 * mixer control.
2382 *
2383 * Returns 0 for success.
2384 */
2385int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
2386        struct snd_ctl_elem_info *uinfo)
2387{
2388        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2389
2390        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2391        uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2392        uinfo->value.enumerated.items = e->max;
2393
2394        if (uinfo->value.enumerated.item > e->max - 1)
2395                uinfo->value.enumerated.item = e->max - 1;
2396        strcpy(uinfo->value.enumerated.name,
2397                e->texts[uinfo->value.enumerated.item]);
2398        return 0;
2399}
2400EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
2401
2402/**
2403 * snd_soc_get_enum_double - enumerated double mixer get callback
2404 * @kcontrol: mixer control
2405 * @ucontrol: control element information
2406 *
2407 * Callback to get the value of a double enumerated mixer.
2408 *
2409 * Returns 0 for success.
2410 */
2411int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
2412        struct snd_ctl_elem_value *ucontrol)
2413{
2414        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2415        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2416        unsigned int val;
2417
2418        val = snd_soc_read(codec, e->reg);
2419        ucontrol->value.enumerated.item[0]
2420                = (val >> e->shift_l) & e->mask;
2421        if (e->shift_l != e->shift_r)
2422                ucontrol->value.enumerated.item[1] =
2423                        (val >> e->shift_r) & e->mask;
2424
2425        return 0;
2426}
2427EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
2428
2429/**
2430 * snd_soc_put_enum_double - enumerated double mixer put callback
2431 * @kcontrol: mixer control
2432 * @ucontrol: control element information
2433 *
2434 * Callback to set the value of a double enumerated mixer.
2435 *
2436 * Returns 0 for success.
2437 */
2438int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
2439        struct snd_ctl_elem_value *ucontrol)
2440{
2441        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2442        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2443        unsigned int val;
2444        unsigned int mask;
2445
2446        if (ucontrol->value.enumerated.item[0] > e->max - 1)
2447                return -EINVAL;
2448        val = ucontrol->value.enumerated.item[0] << e->shift_l;
2449        mask = e->mask << e->shift_l;
2450        if (e->shift_l != e->shift_r) {
2451                if (ucontrol->value.enumerated.item[1] > e->max - 1)
2452                        return -EINVAL;
2453                val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2454                mask |= e->mask << e->shift_r;
2455        }
2456
2457        return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2458}
2459EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
2460
2461/**
2462 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
2463 * @kcontrol: mixer control
2464 * @ucontrol: control element information
2465 *
2466 * Callback to get the value of a double semi enumerated mixer.
2467 *
2468 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2469 * used for handling bitfield coded enumeration for example.
2470 *
2471 * Returns 0 for success.
2472 */
2473int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
2474        struct snd_ctl_elem_value *ucontrol)
2475{
2476        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2477        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2478        unsigned int reg_val, val, mux;
2479
2480        reg_val = snd_soc_read(codec, e->reg);
2481        val = (reg_val >> e->shift_l) & e->mask;
2482        for (mux = 0; mux < e->max; mux++) {
2483                if (val == e->values[mux])
2484                        break;
2485        }
2486        ucontrol->value.enumerated.item[0] = mux;
2487        if (e->shift_l != e->shift_r) {
2488                val = (reg_val >> e->shift_r) & e->mask;
2489                for (mux = 0; mux < e->max; mux++) {
2490                        if (val == e->values[mux])
2491                                break;
2492                }
2493                ucontrol->value.enumerated.item[1] = mux;
2494        }
2495
2496        return 0;
2497}
2498EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);
2499
2500/**
2501 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
2502 * @kcontrol: mixer control
2503 * @ucontrol: control element information
2504 *
2505 * Callback to set the value of a double semi enumerated mixer.
2506 *
2507 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2508 * used for handling bitfield coded enumeration for example.
2509 *
2510 * Returns 0 for success.
2511 */
2512int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
2513        struct snd_ctl_elem_value *ucontrol)
2514{
2515        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2516        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2517        unsigned int val;
2518        unsigned int mask;
2519
2520        if (ucontrol->value.enumerated.item[0] > e->max - 1)
2521                return -EINVAL;
2522        val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2523        mask = e->mask << e->shift_l;
2524        if (e->shift_l != e->shift_r) {
2525                if (ucontrol->value.enumerated.item[1] > e->max - 1)
2526                        return -EINVAL;
2527                val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2528                mask |= e->mask << e->shift_r;
2529        }
2530
2531        return snd_soc_update_bits_locked(codec, e->reg, mask, val);
2532}
2533EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);
2534
2535/**
2536 * snd_soc_info_enum_ext - external enumerated single mixer info callback
2537 * @kcontrol: mixer control
2538 * @uinfo: control element information
2539 *
2540 * Callback to provide information about an external enumerated
2541 * single mixer.
2542 *
2543 * Returns 0 for success.
2544 */
2545int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
2546        struct snd_ctl_elem_info *uinfo)
2547{
2548        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2549
2550        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
2551        uinfo->count = 1;
2552        uinfo->value.enumerated.items = e->max;
2553
2554        if (uinfo->value.enumerated.item > e->max - 1)
2555                uinfo->value.enumerated.item = e->max - 1;
2556        strcpy(uinfo->value.enumerated.name,
2557                e->texts[uinfo->value.enumerated.item]);
2558        return 0;
2559}
2560EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);
2561
2562/**
2563 * snd_soc_info_volsw_ext - external single mixer info callback
2564 * @kcontrol: mixer control
2565 * @uinfo: control element information
2566 *
2567 * Callback to provide information about a single external mixer control.
2568 *
2569 * Returns 0 for success.
2570 */
2571int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
2572        struct snd_ctl_elem_info *uinfo)
2573{
2574        int max = kcontrol->private_value;
2575
2576        if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
2577                uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2578        else
2579                uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2580
2581        uinfo->count = 1;
2582        uinfo->value.integer.min = 0;
2583        uinfo->value.integer.max = max;
2584        return 0;
2585}
2586EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
2587
2588/**
2589 * snd_soc_info_volsw - single mixer info callback
2590 * @kcontrol: mixer control
2591 * @uinfo: control element information
2592 *
2593 * Callback to provide information about a single mixer control, or a double
2594 * mixer control that spans 2 registers.
2595 *
2596 * Returns 0 for success.
2597 */
2598int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
2599        struct snd_ctl_elem_info *uinfo)
2600{
2601        struct soc_mixer_control *mc =
2602                (struct soc_mixer_control *)kcontrol->private_value;
2603        int platform_max;
2604
2605        if (!mc->platform_max)
2606                mc->platform_max = mc->max;
2607        platform_max = mc->platform_max;
2608
2609        if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
2610                uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2611        else
2612                uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2613
2614        uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
2615        uinfo->value.integer.min = 0;
2616        uinfo->value.integer.max = platform_max;
2617        return 0;
2618}
2619EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
2620
2621/**
2622 * snd_soc_get_volsw - single mixer get callback
2623 * @kcontrol: mixer control
2624 * @ucontrol: control element information
2625 *
2626 * Callback to get the value of a single mixer control, or a double mixer
2627 * control that spans 2 registers.
2628 *
2629 * Returns 0 for success.
2630 */
2631int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
2632        struct snd_ctl_elem_value *ucontrol)
2633{
2634        struct soc_mixer_control *mc =
2635                (struct soc_mixer_control *)kcontrol->private_value;
2636        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2637        unsigned int reg = mc->reg;
2638        unsigned int reg2 = mc->rreg;
2639        unsigned int shift = mc->shift;
2640        unsigned int rshift = mc->rshift;
2641        int max = mc->max;
2642        unsigned int mask = (1 << fls(max)) - 1;
2643        unsigned int invert = mc->invert;
2644
2645        ucontrol->value.integer.value[0] =
2646                (snd_soc_read(codec, reg) >> shift) & mask;
2647        if (invert)
2648                ucontrol->value.integer.value[0] =
2649                        max - ucontrol->value.integer.value[0];
2650
2651        if (snd_soc_volsw_is_stereo(mc)) {
2652                if (reg == reg2)
2653                        ucontrol->value.integer.value[1] =
2654                                (snd_soc_read(codec, reg) >> rshift) & mask;
2655                else
2656                        ucontrol->value.integer.value[1] =
2657                                (snd_soc_read(codec, reg2) >> shift) & mask;
2658                if (invert)
2659                        ucontrol->value.integer.value[1] =
2660                                max - ucontrol->value.integer.value[1];
2661        }
2662
2663        return 0;
2664}
2665EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
2666
2667/**
2668 * snd_soc_put_volsw - single mixer put callback
2669 * @kcontrol: mixer control
2670 * @ucontrol: control element information
2671 *
2672 * Callback to set the value of a single mixer control, or a double mixer
2673 * control that spans 2 registers.
2674 *
2675 * Returns 0 for success.
2676 */
2677int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
2678        struct snd_ctl_elem_value *ucontrol)
2679{
2680        struct soc_mixer_control *mc =
2681                (struct soc_mixer_control *)kcontrol->private_value;
2682        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2683        unsigned int reg = mc->reg;
2684        unsigned int reg2 = mc->rreg;
2685        unsigned int shift = mc->shift;
2686        unsigned int rshift = mc->rshift;
2687        int max = mc->max;
2688        unsigned int mask = (1 << fls(max)) - 1;
2689        unsigned int invert = mc->invert;
2690        int err;
2691        bool type_2r = 0;
2692        unsigned int val2 = 0;
2693        unsigned int val, val_mask;
2694
2695        val = (ucontrol->value.integer.value[0] & mask);
2696        if (invert)
2697                val = max - val;
2698        val_mask = mask << shift;
2699        val = val << shift;
2700        if (snd_soc_volsw_is_stereo(mc)) {
2701                val2 = (ucontrol->value.integer.value[1] & mask);
2702                if (invert)
2703                        val2 = max - val2;
2704                if (reg == reg2) {
2705                        val_mask |= mask << rshift;
2706                        val |= val2 << rshift;
2707                } else {
2708                        val2 = val2 << shift;
2709                        type_2r = 1;
2710                }
2711        }
2712        err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2713        if (err < 0)
2714                return err;
2715
2716        if (type_2r)
2717                err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
2718
2719        return err;
2720}
2721EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
2722
2723/**
2724 * snd_soc_get_volsw_sx - single mixer get callback
2725 * @kcontrol: mixer control
2726 * @ucontrol: control element information
2727 *
2728 * Callback to get the value of a single mixer control, or a double mixer
2729 * control that spans 2 registers.
2730 *
2731 * Returns 0 for success.
2732 */
2733int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
2734                      struct snd_ctl_elem_value *ucontrol)
2735{
2736        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2737        struct soc_mixer_control *mc =
2738            (struct soc_mixer_control *)kcontrol->private_value;
2739
2740        unsigned int reg = mc->reg;
2741        unsigned int reg2 = mc->rreg;
2742        unsigned int shift = mc->shift;
2743        unsigned int rshift = mc->rshift;
2744        int max = mc->max;
2745        int min = mc->min;
2746        int mask = (1 << (fls(min + max) - 1)) - 1;
2747
2748        ucontrol->value.integer.value[0] =
2749            ((snd_soc_read(codec, reg) >> shift) - min) & mask;
2750
2751        if (snd_soc_volsw_is_stereo(mc))
2752                ucontrol->value.integer.value[1] =
2753                        ((snd_soc_read(codec, reg2) >> rshift) - min) & mask;
2754
2755        return 0;
2756}
2757EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);
2758
2759/**
2760 * snd_soc_put_volsw_sx - double mixer set callback
2761 * @kcontrol: mixer control
2762 * @uinfo: control element information
2763 *
2764 * Callback to set the value of a double mixer control that spans 2 registers.
2765 *
2766 * Returns 0 for success.
2767 */
2768int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
2769                         struct snd_ctl_elem_value *ucontrol)
2770{
2771        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2772        struct soc_mixer_control *mc =
2773            (struct soc_mixer_control *)kcontrol->private_value;
2774
2775        unsigned int reg = mc->reg;
2776        unsigned int reg2 = mc->rreg;
2777        unsigned int shift = mc->shift;
2778        unsigned int rshift = mc->rshift;
2779        int max = mc->max;
2780        int min = mc->min;
2781        int mask = (1 << (fls(min + max) - 1)) - 1;
2782        int err = 0;
2783        unsigned short val, val_mask, val2 = 0;
2784
2785        val_mask = mask << shift;
2786        val = (ucontrol->value.integer.value[0] + min) & mask;
2787        val = val << shift;
2788
2789        err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2790        if (err < 0)
2791                return err;
2792
2793        if (snd_soc_volsw_is_stereo(mc)) {
2794                val_mask = mask << rshift;
2795                val2 = (ucontrol->value.integer.value[1] + min) & mask;
2796                val2 = val2 << rshift;
2797
2798                if (snd_soc_update_bits_locked(codec, reg2, val_mask, val2))
2799                        return err;
2800        }
2801        return 0;
2802}
2803EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);
2804
2805/**
2806 * snd_soc_info_volsw_s8 - signed mixer info callback
2807 * @kcontrol: mixer control
2808 * @uinfo: control element information
2809 *
2810 * Callback to provide information about a signed mixer control.
2811 *
2812 * Returns 0 for success.
2813 */
2814int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
2815        struct snd_ctl_elem_info *uinfo)
2816{
2817        struct soc_mixer_control *mc =
2818                (struct soc_mixer_control *)kcontrol->private_value;
2819        int platform_max;
2820        int min = mc->min;
2821
2822        if (!mc->platform_max)
2823                mc->platform_max = mc->max;
2824        platform_max = mc->platform_max;
2825
2826        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2827        uinfo->count = 2;
2828        uinfo->value.integer.min = 0;
2829        uinfo->value.integer.max = platform_max - min;
2830        return 0;
2831}
2832EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);
2833
2834/**
2835 * snd_soc_get_volsw_s8 - signed mixer get callback
2836 * @kcontrol: mixer control
2837 * @ucontrol: control element information
2838 *
2839 * Callback to get the value of a signed mixer control.
2840 *
2841 * Returns 0 for success.
2842 */
2843int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
2844        struct snd_ctl_elem_value *ucontrol)
2845{
2846        struct soc_mixer_control *mc =
2847                (struct soc_mixer_control *)kcontrol->private_value;
2848        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2849        unsigned int reg = mc->reg;
2850        int min = mc->min;
2851        int val = snd_soc_read(codec, reg);
2852
2853        ucontrol->value.integer.value[0] =
2854                ((signed char)(val & 0xff))-min;
2855        ucontrol->value.integer.value[1] =
2856                ((signed char)((val >> 8) & 0xff))-min;
2857        return 0;
2858}
2859EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);
2860
2861/**
2862 * snd_soc_put_volsw_sgn - signed mixer put callback
2863 * @kcontrol: mixer control
2864 * @ucontrol: control element information
2865 *
2866 * Callback to set the value of a signed mixer control.
2867 *
2868 * Returns 0 for success.
2869 */
2870int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
2871        struct snd_ctl_elem_value *ucontrol)
2872{
2873        struct soc_mixer_control *mc =
2874                (struct soc_mixer_control *)kcontrol->private_value;
2875        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2876        unsigned int reg = mc->reg;
2877        int min = mc->min;
2878        unsigned int val;
2879
2880        val = (ucontrol->value.integer.value[0]+min) & 0xff;
2881        val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;
2882
2883        return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2884}
2885EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);
2886
2887/**
2888 * snd_soc_info_volsw_range - single mixer info callback with range.
2889 * @kcontrol: mixer control
2890 * @uinfo: control element information
2891 *
2892 * Callback to provide information, within a range, about a single
2893 * mixer control.
2894 *
2895 * returns 0 for success.
2896 */
2897int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
2898        struct snd_ctl_elem_info *uinfo)
2899{
2900        struct soc_mixer_control *mc =
2901                (struct soc_mixer_control *)kcontrol->private_value;
2902        int platform_max;
2903        int min = mc->min;
2904
2905        if (!mc->platform_max)
2906                mc->platform_max = mc->max;
2907        platform_max = mc->platform_max;
2908
2909        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2910        uinfo->count = 1;
2911        uinfo->value.integer.min = 0;
2912        uinfo->value.integer.max = platform_max - min;
2913
2914        return 0;
2915}
2916EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);
2917
2918/**
2919 * snd_soc_put_volsw_range - single mixer put value callback with range.
2920 * @kcontrol: mixer control
2921 * @ucontrol: control element information
2922 *
2923 * Callback to set the value, within a range, for a single mixer control.
2924 *
2925 * Returns 0 for success.
2926 */
2927int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
2928        struct snd_ctl_elem_value *ucontrol)
2929{
2930        struct soc_mixer_control *mc =
2931                (struct soc_mixer_control *)kcontrol->private_value;
2932        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2933        unsigned int reg = mc->reg;
2934        unsigned int shift = mc->shift;
2935        int min = mc->min;
2936        int max = mc->max;
2937        unsigned int mask = (1 << fls(max)) - 1;
2938        unsigned int invert = mc->invert;
2939        unsigned int val, val_mask;
2940
2941        val = ((ucontrol->value.integer.value[0] + min) & mask);
2942        if (invert)
2943                val = max - val;
2944        val_mask = mask << shift;
2945        val = val << shift;
2946
2947        return snd_soc_update_bits_locked(codec, reg, val_mask, val);
2948}
2949EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);
2950
2951/**
2952 * snd_soc_get_volsw_range - single mixer get callback with range
2953 * @kcontrol: mixer control
2954 * @ucontrol: control element information
2955 *
2956 * Callback to get the value, within a range, of a single mixer control.
2957 *
2958 * Returns 0 for success.
2959 */
2960int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
2961        struct snd_ctl_elem_value *ucontrol)
2962{
2963        struct soc_mixer_control *mc =
2964                (struct soc_mixer_control *)kcontrol->private_value;
2965        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2966        unsigned int reg = mc->reg;
2967        unsigned int shift = mc->shift;
2968        int min = mc->min;
2969        int max = mc->max;
2970        unsigned int mask = (1 << fls(max)) - 1;
2971        unsigned int invert = mc->invert;
2972
2973        ucontrol->value.integer.value[0] =
2974                (snd_soc_read(codec, reg) >> shift) & mask;
2975        if (invert)
2976                ucontrol->value.integer.value[0] =
2977                        max - ucontrol->value.integer.value[0];
2978        ucontrol->value.integer.value[0] =
2979                ucontrol->value.integer.value[0] - min;
2980
2981        return 0;
2982}
2983EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
2984
2985/**
2986 * snd_soc_limit_volume - Set new limit to an existing volume control.
2987 *
2988 * @codec: where to look for the control
2989 * @name: Name of the control
2990 * @max: new maximum limit
2991 *
2992 * Return 0 for success, else error.
2993 */
2994int snd_soc_limit_volume(struct snd_soc_codec *codec,
2995        const char *name, int max)
2996{
2997        struct snd_card *card = codec->card->snd_card;
2998        struct snd_kcontrol *kctl;
2999        struct soc_mixer_control *mc;
3000        int found = 0;
3001        int ret = -EINVAL;
3002
3003        /* Sanity check for name and max */
3004        if (unlikely(!name || max <= 0))
3005                return -EINVAL;
3006
3007        list_for_each_entry(kctl, &card->controls, list) {
3008                if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
3009                        found = 1;
3010                        break;
3011                }
3012        }
3013        if (found) {
3014                mc = (struct soc_mixer_control *)kctl->private_value;
3015                if (max <= mc->max) {
3016                        mc->platform_max = max;
3017                        ret = 0;
3018                }
3019        }
3020        return ret;
3021}
3022EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
3023
3024int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
3025                       struct snd_ctl_elem_info *uinfo)
3026{
3027        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3028        struct soc_bytes *params = (void *)kcontrol->private_value;
3029
3030        uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
3031        uinfo->count = params->num_regs * codec->val_bytes;
3032
3033        return 0;
3034}
3035EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
3036
3037int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
3038                      struct snd_ctl_elem_value *ucontrol)
3039{
3040        struct soc_bytes *params = (void *)kcontrol->private_value;
3041        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3042        int ret;
3043
3044        if (codec->using_regmap)
3045                ret = regmap_raw_read(codec->control_data, params->base,
3046                                      ucontrol->value.bytes.data,
3047                                      params->num_regs * codec->val_bytes);
3048        else
3049                ret = -EINVAL;
3050
3051        /* Hide any masked bytes to ensure consistent data reporting */
3052        if (ret == 0 && params->mask) {
3053                switch (codec->val_bytes) {
3054                case 1:
3055                        ucontrol->value.bytes.data[0] &= ~params->mask;
3056                        break;
3057                case 2:
3058                        ((u16 *)(&ucontrol->value.bytes.data))[0]
3059                                &= ~params->mask;
3060                        break;
3061                case 4:
3062                        ((u32 *)(&ucontrol->value.bytes.data))[0]
3063                                &= ~params->mask;
3064                        break;
3065                default:
3066                        return -EINVAL;
3067                }
3068        }
3069
3070        return ret;
3071}
3072EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
3073
3074int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
3075                      struct snd_ctl_elem_value *ucontrol)
3076{
3077        struct soc_bytes *params = (void *)kcontrol->private_value;
3078        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3079        int ret, len;
3080        unsigned int val;
3081        void *data;
3082
3083        if (!codec->using_regmap)
3084                return -EINVAL;
3085
3086        data = ucontrol->value.bytes.data;
3087        len = params->num_regs * codec->val_bytes;
3088
3089        /*
3090         * If we've got a mask then we need to preserve the register
3091         * bits.  We shouldn't modify the incoming data so take a
3092         * copy.
3093         */
3094        if (params->mask) {
3095                ret = regmap_read(codec->control_data, params->base, &val);
3096                if (ret != 0)
3097                        return ret;
3098
3099                val &= params->mask;
3100
3101                data = kmemdup(data, len, GFP_KERNEL);
3102                if (!data)
3103                        return -ENOMEM;
3104
3105                switch (codec->val_bytes) {
3106                case 1:
3107                        ((u8 *)data)[0] &= ~params->mask;
3108                        ((u8 *)data)[0] |= val;
3109                        break;
3110                case 2:
3111                        ((u16 *)data)[0] &= cpu_to_be16(~params->mask);
3112                        ((u16 *)data)[0] |= cpu_to_be16(val);
3113                        break;
3114                case 4:
3115                        ((u32 *)data)[0] &= cpu_to_be32(~params->mask);
3116                        ((u32 *)data)[0] |= cpu_to_be32(val);
3117                        break;
3118                default:
3119                        return -EINVAL;
3120                }
3121        }
3122
3123        ret = regmap_raw_write(codec->control_data, params->base,
3124                               data, len);
3125
3126        if (params->mask)
3127                kfree(data);
3128
3129        return ret;
3130}
3131EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
3132
3133/**
3134 * snd_soc_info_xr_sx - signed multi register info callback
3135 * @kcontrol: mreg control
3136 * @uinfo: control element information
3137 *
3138 * Callback to provide information of a control that can
3139 * span multiple codec registers which together
3140 * forms a single signed value in a MSB/LSB manner.
3141 *
3142 * Returns 0 for success.
3143 */
3144int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
3145        struct snd_ctl_elem_info *uinfo)
3146{
3147        struct soc_mreg_control *mc =
3148                (struct soc_mreg_control *)kcontrol->private_value;
3149        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3150        uinfo->count = 1;
3151        uinfo->value.integer.min = mc->min;
3152        uinfo->value.integer.max = mc->max;
3153
3154        return 0;
3155}
3156EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);
3157
3158/**
3159 * snd_soc_get_xr_sx - signed multi register get callback
3160 * @kcontrol: mreg control
3161 * @ucontrol: control element information
3162 *
3163 * Callback to get the value of a control that can span
3164 * multiple codec registers which together forms a single
3165 * signed value in a MSB/LSB manner. The control supports
3166 * specifying total no of bits used to allow for bitfields
3167 * across the multiple codec registers.
3168 *
3169 * Returns 0 for success.
3170 */
3171int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
3172        struct snd_ctl_elem_value *ucontrol)
3173{
3174        struct soc_mreg_control *mc =
3175                (struct soc_mreg_control *)kcontrol->private_value;
3176        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3177        unsigned int regbase = mc->regbase;
3178        unsigned int regcount = mc->regcount;
3179        unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3180        unsigned int regwmask = (1<<regwshift)-1;
3181        unsigned int invert = mc->invert;
3182        unsigned long mask = (1UL<<mc->nbits)-1;
3183        long min = mc->min;
3184        long max = mc->max;
3185        long val = 0;
3186        unsigned long regval;
3187        unsigned int i;
3188
3189        for (i = 0; i < regcount; i++) {
3190                regval = snd_soc_read(codec, regbase+i) & regwmask;
3191                val |= regval << (regwshift*(regcount-i-1));
3192        }
3193        val &= mask;
3194        if (min < 0 && val > max)
3195                val |= ~mask;
3196        if (invert)
3197                val = max - val;
3198        ucontrol->value.integer.value[0] = val;
3199
3200        return 0;
3201}
3202EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);
3203
3204/**
3205 * snd_soc_put_xr_sx - signed multi register get callback
3206 * @kcontrol: mreg control
3207 * @ucontrol: control element information
3208 *
3209 * Callback to set the value of a control that can span
3210 * multiple codec registers which together forms a single
3211 * signed value in a MSB/LSB manner. The control supports
3212 * specifying total no of bits used to allow for bitfields
3213 * across the multiple codec registers.
3214 *
3215 * Returns 0 for success.
3216 */
3217int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
3218        struct snd_ctl_elem_value *ucontrol)
3219{
3220        struct soc_mreg_control *mc =
3221                (struct soc_mreg_control *)kcontrol->private_value;
3222        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3223        unsigned int regbase = mc->regbase;
3224        unsigned int regcount = mc->regcount;
3225        unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
3226        unsigned int regwmask = (1<<regwshift)-1;
3227        unsigned int invert = mc->invert;
3228        unsigned long mask = (1UL<<mc->nbits)-1;
3229        long max = mc->max;
3230        long val = ucontrol->value.integer.value[0];
3231        unsigned int i, regval, regmask;
3232        int err;
3233
3234        if (invert)
3235                val = max - val;
3236        val &= mask;
3237        for (i = 0; i < regcount; i++) {
3238                regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
3239                regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
3240                err = snd_soc_update_bits_locked(codec, regbase+i,
3241                                regmask, regval);
3242                if (err < 0)
3243                        return err;
3244        }
3245
3246        return 0;
3247}
3248EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);
3249
3250/**
3251 * snd_soc_get_strobe - strobe get callback
3252 * @kcontrol: mixer control
3253 * @ucontrol: control element information
3254 *
3255 * Callback get the value of a strobe mixer control.
3256 *
3257 * Returns 0 for success.
3258 */
3259int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
3260        struct snd_ctl_elem_value *ucontrol)
3261{
3262        struct soc_mixer_control *mc =
3263                (struct soc_mixer_control *)kcontrol->private_value;
3264        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3265        unsigned int reg = mc->reg;
3266        unsigned int shift = mc->shift;
3267        unsigned int mask = 1 << shift;
3268        unsigned int invert = mc->invert != 0;
3269        unsigned int val = snd_soc_read(codec, reg) & mask;
3270
3271        if (shift != 0 && val != 0)
3272                val = val >> shift;
3273        ucontrol->value.enumerated.item[0] = val ^ invert;
3274
3275        return 0;
3276}
3277EXPORT_SYMBOL_GPL(snd_soc_get_strobe);
3278
3279/**
3280 * snd_soc_put_strobe - strobe put callback
3281 * @kcontrol: mixer control
3282 * @ucontrol: control element information
3283 *
3284 * Callback strobe a register bit to high then low (or the inverse)
3285 * in one pass of a single mixer enum control.
3286 *
3287 * Returns 1 for success.
3288 */
3289int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
3290        struct snd_ctl_elem_value *ucontrol)
3291{
3292        struct soc_mixer_control *mc =
3293                (struct soc_mixer_control *)kcontrol->private_value;
3294        struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3295        unsigned int reg = mc->reg;
3296        unsigned int shift = mc->shift;
3297        unsigned int mask = 1 << shift;
3298        unsigned int invert = mc->invert != 0;
3299        unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
3300        unsigned int val1 = (strobe ^ invert) ? mask : 0;
3301        unsigned int val2 = (strobe ^ invert) ? 0 : mask;
3302        int err;
3303
3304        err = snd_soc_update_bits_locked(codec, reg, mask, val1);
3305        if (err < 0)
3306                return err;
3307
3308        err = snd_soc_update_bits_locked(codec, reg, mask, val2);
3309        return err;
3310}
3311EXPORT_SYMBOL_GPL(snd_soc_put_strobe);
3312
3313/**
3314 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
3315 * @dai: DAI
3316 * @clk_id: DAI specific clock ID
3317 * @freq: new clock frequency in Hz
3318 * @dir: new clock direction - input/output.
3319 *
3320 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
3321 */
3322int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
3323        unsigned int freq, int dir)
3324{
3325        if (dai->driver && dai->driver->ops->set_sysclk)
3326                return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3327        else if (dai->codec && dai->codec->driver->set_sysclk)
3328                return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
3329                                                      freq, dir);
3330        else
3331                return -EINVAL;
3332}
3333EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
3334
3335/**
3336 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
3337 * @codec: CODEC
3338 * @clk_id: DAI specific clock ID
3339 * @source: Source for the clock
3340 * @freq: new clock frequency in Hz
3341 * @dir: new clock direction - input/output.
3342 *
3343 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
3344 */
3345int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
3346                             int source, unsigned int freq, int dir)
3347{
3348        if (codec->driver->set_sysclk)
3349                return codec->driver->set_sysclk(codec, clk_id, source,
3350                                                 freq, dir);
3351        else
3352                return -EINVAL;
3353}
3354EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
3355
3356/**
3357 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
3358 * @dai: DAI
3359 * @div_id: DAI specific clock divider ID
3360 * @div: new clock divisor.
3361 *
3362 * Configures the clock dividers. This is used to derive the best DAI bit and
3363 * frame clocks from the system or master clock. It's best to set the DAI bit
3364 * and frame clocks as low as possible to save system power.
3365 */
3366int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
3367        int div_id, int div)
3368{
3369        if (dai->driver && dai->driver->ops->set_clkdiv)
3370                return dai->driver->ops->set_clkdiv(dai, div_id, div);
3371        else
3372                return -EINVAL;
3373}
3374EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
3375
3376/**
3377 * snd_soc_dai_set_pll - configure DAI PLL.
3378 * @dai: DAI
3379 * @pll_id: DAI specific PLL ID
3380 * @source: DAI specific source for the PLL
3381 * @freq_in: PLL input clock frequency in Hz
3382 * @freq_out: requested PLL output clock frequency in Hz
3383 *
3384 * Configures and enables PLL to generate output clock based on input clock.
3385 */
3386int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
3387        unsigned int freq_in, unsigned int freq_out)
3388{
3389        if (dai->driver && dai->driver->ops->set_pll)
3390                return dai->driver->ops->set_pll(dai, pll_id, source,
3391                                         freq_in, freq_out);
3392        else if (dai->codec && dai->codec->driver->set_pll)
3393                return dai->codec->driver->set_pll(dai->codec, pll_id, source,
3394                                                   freq_in, freq_out);
3395        else
3396                return -EINVAL;
3397}
3398EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
3399
3400/*
3401 * snd_soc_codec_set_pll - configure codec PLL.
3402 * @codec: CODEC
3403 * @pll_id: DAI specific PLL ID
3404 * @source: DAI specific source for the PLL
3405 * @freq_in: PLL input clock frequency in Hz
3406 * @freq_out: requested PLL output clock frequency in Hz
3407 *
3408 * Configures and enables PLL to generate output clock based on input clock.
3409 */
3410int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
3411                          unsigned int freq_in, unsigned int freq_out)
3412{
3413        if (codec->driver->set_pll)
3414                return codec->driver->set_pll(codec, pll_id, source,
3415                                              freq_in, freq_out);
3416        else
3417                return -EINVAL;
3418}
3419EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
3420
3421/**
3422 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
3423 * @dai: DAI
3424 * @fmt: SND_SOC_DAIFMT_ format value.
3425 *
3426 * Configures the DAI hardware format and clocking.
3427 */
3428int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
3429{
3430        if (dai->driver == NULL)
3431                return -EINVAL;
3432        if (dai->driver->ops->set_fmt == NULL)
3433                return -ENOTSUPP;
3434        return dai->driver->ops->set_fmt(dai, fmt);
3435}
3436EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
3437
3438/**
3439 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
3440 * @dai: DAI
3441 * @tx_mask: bitmask representing active TX slots.
3442 * @rx_mask: bitmask representing active RX slots.
3443 * @slots: Number of slots in use.
3444 * @slot_width: Width in bits for each slot.
3445 *
3446 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
3447 * specific.
3448 */
3449int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3450        unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3451{
3452        if (dai->driver && dai->driver->ops->set_tdm_slot)
3453                return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3454                                slots, slot_width);
3455        else
3456                return -EINVAL;
3457}
3458EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
3459
3460/**
3461 * snd_soc_dai_set_channel_map - configure DAI audio channel map
3462 * @dai: DAI
3463 * @tx_num: how many TX channels
3464 * @tx_slot: pointer to an array which imply the TX slot number channel
3465 *           0~num-1 uses
3466 * @rx_num: how many RX channels
3467 * @rx_slot: pointer to an array which imply the RX slot number channel
3468 *           0~num-1 uses
3469 *
3470 * configure the relationship between channel number and TDM slot number.
3471 */
3472int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
3473        unsigned int tx_num, unsigned int *tx_slot,
3474        unsigned int rx_num, unsigned int *rx_slot)
3475{
3476        if (dai->driver && dai->driver->ops->set_channel_map)
3477                return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3478                        rx_num, rx_slot);
3479        else
3480                return -EINVAL;
3481}
3482EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
3483
3484/**
3485 * snd_soc_dai_set_tristate - configure DAI system or master clock.
3486 * @dai: DAI
3487 * @tristate: tristate enable
3488 *
3489 * Tristates the DAI so that others can use it.
3490 */
3491int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
3492{
3493        if (dai->driver && dai->driver->ops->set_tristate)
3494                return dai->driver->ops->set_tristate(dai, tristate);
3495        else
3496                return -EINVAL;
3497}
3498EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
3499
3500/**
3501 * snd_soc_dai_digital_mute - configure DAI system or master clock.
3502 * @dai: DAI
3503 * @mute: mute enable
3504 *
3505 * Mutes the DAI DAC.
3506 */
3507int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
3508{
3509        if (dai->driver && dai->driver->ops->digital_mute)
3510                return dai->driver->ops->digital_mute(dai, mute);
3511        else
3512                return -ENOTSUPP;
3513}
3514EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
3515
3516/**
3517 * snd_soc_register_card - Register a card with the ASoC core
3518 *
3519 * @card: Card to register
3520 *
3521 */
3522int snd_soc_register_card(struct snd_soc_card *card)
3523{
3524        int i, ret;
3525
3526        if (!card->name || !card->dev)
3527                return -EINVAL;
3528
3529        for (i = 0; i < card->num_links; i++) {
3530                struct snd_soc_dai_link *link = &card->dai_link[i];
3531
3532                /*
3533                 * Codec must be specified by 1 of name or OF node,
3534                 * not both or neither.
3535                 */
3536                if (!!link->codec_name == !!link->codec_of_node) {
3537                        dev_err(card->dev,
3538                                "Neither/both codec name/of_node are set for %s\n",
3539                                link->name);
3540                        return -EINVAL;
3541                }
3542                /* Codec DAI name must be specified */
3543                if (!link->codec_dai_name) {
3544                        dev_err(card->dev, "codec_dai_name not set for %s\n",
3545                                link->name);
3546                        return -EINVAL;
3547                }
3548
3549                /*
3550                 * Platform may be specified by either name or OF node, but
3551                 * can be left unspecified, and a dummy platform will be used.
3552                 */
3553                if (link->platform_name && link->platform_of_node) {
3554                        dev_err(card->dev,
3555                                "Both platform name/of_node are set for %s\n", link->name);
3556                        return -EINVAL;
3557                }
3558
3559                /*
3560                 * CPU device may be specified by either name or OF node, but
3561                 * can be left unspecified, and will be matched based on DAI
3562                 * name alone..
3563                 */
3564                if (link->cpu_name && link->cpu_of_node) {
3565                        dev_err(card->dev,
3566                                "Neither/both cpu name/of_node are set for %s\n",
3567                                link->name);
3568                        return -EINVAL;
3569                }
3570                /*
3571                 * At least one of CPU DAI name or CPU device name/node must be
3572                 * specified
3573                 */
3574                if (!link->cpu_dai_name &&
3575                    !(link->cpu_name || link->cpu_of_node)) {
3576                        dev_err(card->dev,
3577                                "Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
3578                                link->name);
3579                        return -EINVAL;
3580                }
3581        }
3582
3583        dev_set_drvdata(card->dev, card);
3584
3585        snd_soc_initialize_card_lists(card);
3586
3587        soc_init_card_debugfs(card);
3588
3589        card->rtd = devm_kzalloc(card->dev,
3590                                 sizeof(struct snd_soc_pcm_runtime) *
3591                                 (card->num_links + card->num_aux_devs),
3592                                 GFP_KERNEL);
3593        if (card->rtd == NULL)
3594                return -ENOMEM;
3595        card->num_rtd = 0;
3596        card->rtd_aux = &card->rtd[card->num_links];
3597
3598        for (i = 0; i < card->num_links; i++)
3599                card->rtd[i].dai_link = &card->dai_link[i];
3600
3601        INIT_LIST_HEAD(&card->list);
3602        INIT_LIST_HEAD(&card->dapm_dirty);
3603        card->instantiated = 0;
3604        mutex_init(&card->mutex);
3605        mutex_init(&card->dapm_mutex);
3606
3607        ret = snd_soc_instantiate_card(card);
3608        if (ret != 0)
3609                soc_cleanup_card_debugfs(card);
3610
3611        return ret;
3612}
3613EXPORT_SYMBOL_GPL(snd_soc_register_card);
3614
3615/**
3616 * snd_soc_unregister_card - Unregister a card with the ASoC core
3617 *
3618 * @card: Card to unregister
3619 *
3620 */
3621int snd_soc_unregister_card(struct snd_soc_card *card)
3622{
3623        if (card->instantiated)
3624                soc_cleanup_card_resources(card);
3625        dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);
3626
3627        return 0;
3628}
3629EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3630
3631/*
3632 * Simplify DAI link configuration by removing ".-1" from device names
3633 * and sanitizing names.
3634 */
3635static char *fmt_single_name(struct device *dev, int *id)
3636{
3637        char *found, name[NAME_SIZE];
3638        int id1, id2;
3639
3640        if (dev_name(dev) == NULL)
3641                return NULL;
3642
3643        strlcpy(name, dev_name(dev), NAME_SIZE);
3644
3645        /* are we a "%s.%d" name (platform and SPI components) */
3646        found = strstr(name, dev->driver->name);
3647        if (found) {
3648                /* get ID */
3649                if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3650
3651                        /* discard ID from name if ID == -1 */
3652                        if (*id == -1)
3653                                found[strlen(dev->driver->name)] = '\0';
3654                }
3655
3656        } else {
3657                /* I2C component devices are named "bus-addr"  */
3658                if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3659                        char tmp[NAME_SIZE];
3660
3661                        /* create unique ID number from I2C addr and bus */
3662                        *id = ((id1 & 0xffff) << 16) + id2;
3663
3664                        /* sanitize component name for DAI link creation */
3665                        snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3666                        strlcpy(name, tmp, NAME_SIZE);
3667                } else
3668                        *id = 0;
3669        }
3670
3671        return kstrdup(name, GFP_KERNEL);
3672}
3673
3674/*
3675 * Simplify DAI link naming for single devices with multiple DAIs by removing
3676 * any ".-1" and using the DAI name (instead of device name).
3677 */
3678static inline char *fmt_multiple_name(struct device *dev,
3679                struct snd_soc_dai_driver *dai_drv)
3680{
3681        if (dai_drv->name == NULL) {
3682                pr_err("asoc: error - multiple DAI %s registered with no name\n",
3683                                dev_name(dev));
3684                return NULL;
3685        }
3686
3687        return kstrdup(dai_drv->name, GFP_KERNEL);
3688}
3689
3690/**
3691 * snd_soc_register_dai - Register a DAI with the ASoC core
3692 *
3693 * @dai: DAI to register
3694 */
3695int snd_soc_register_dai(struct device *dev,
3696                struct snd_soc_dai_driver *dai_drv)
3697{
3698        struct snd_soc_codec *codec;
3699        struct snd_soc_dai *dai;
3700
3701        dev_dbg(dev, "dai register %s\n", dev_name(dev));
3702
3703        dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3704        if (dai == NULL)
3705                return -ENOMEM;
3706
3707        /* create DAI component name */
3708        dai->name = fmt_single_name(dev, &dai->id);
3709        if (dai->name == NULL) {
3710                kfree(dai);
3711                return -ENOMEM;
3712        }
3713
3714        dai->dev = dev;
3715        dai->driver = dai_drv;
3716        dai->dapm.dev = dev;
3717        if (!dai->driver->ops)
3718                dai->driver->ops = &null_dai_ops;
3719
3720        mutex_lock(&client_mutex);
3721
3722        list_for_each_entry(codec, &codec_list, list) {
3723                if (codec->dev == dev) {
3724                        dev_dbg(dev, "Mapped DAI %s to CODEC %s\n",
3725                                dai->name, codec->name);
3726                        dai->codec = codec;
3727                        break;
3728                }
3729        }
3730
3731        if (!dai->codec)
3732                dai->dapm.idle_bias_off = 1;
3733
3734        list_add(&dai->list, &dai_list);
3735
3736        mutex_unlock(&client_mutex);
3737
3738        pr_debug("Registered DAI '%s'\n", dai->name);
3739
3740        return 0;
3741}
3742EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3743
3744/**
3745 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
3746 *
3747 * @dai: DAI to unregister
3748 */
3749void snd_soc_unregister_dai(struct device *dev)
3750{
3751        struct snd_soc_dai *dai;
3752
3753        list_for_each_entry(dai, &dai_list, list) {
3754                if (dev == dai->dev)
3755                        goto found;
3756        }
3757        return;
3758
3759found:
3760        mutex_lock(&client_mutex);
3761        list_del(&dai->list);
3762        mutex_unlock(&client_mutex);
3763
3764        pr_debug("Unregistered DAI '%s'\n", dai->name);
3765        kfree(dai->name);
3766        kfree(dai);
3767}
3768EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
3769
3770/**
3771 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
3772 *
3773 * @dai: Array of DAIs to register
3774 * @count: Number of DAIs
3775 */
3776int snd_soc_register_dais(struct device *dev,
3777                struct snd_soc_dai_driver *dai_drv, size_t count)
3778{
3779        struct snd_soc_codec *codec;
3780        struct snd_soc_dai *dai;
3781        int i, ret = 0;
3782
3783        dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
3784
3785        for (i = 0; i < count; i++) {
3786
3787                dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3788                if (dai == NULL) {
3789                        ret = -ENOMEM;
3790                        goto err;
3791                }
3792
3793                /* create DAI component name */
3794                dai->name = fmt_multiple_name(dev, &dai_drv[i]);
3795                if (dai->name == NULL) {
3796                        kfree(dai);
3797                        ret = -EINVAL;
3798                        goto err;
3799                }
3800
3801                dai->dev = dev;
3802                dai->driver = &dai_drv[i];
3803                if (dai->driver->id)
3804                        dai->id = dai->driver->id;
3805                else
3806                        dai->id = i;
3807                dai->dapm.dev = dev;
3808                if (!dai->driver->ops)
3809                        dai->driver->ops = &null_dai_ops;
3810
3811                mutex_lock(&client_mutex);
3812
3813                list_for_each_entry(codec, &codec_list, list) {
3814                        if (codec->dev == dev) {
3815                                dev_dbg(dev, "Mapped DAI %s to CODEC %s\n",
3816                                        dai->name, codec->name);
3817                                dai->codec = codec;
3818                                break;
3819                        }
3820                }
3821
3822                if (!dai->codec)
3823                        dai->dapm.idle_bias_off = 1;
3824
3825                list_add(&dai->list, &dai_list);
3826
3827                mutex_unlock(&client_mutex);
3828
3829                pr_debug("Registered DAI '%s'\n", dai->name);
3830        }
3831
3832        return 0;
3833
3834err:
3835        for (i--; i >= 0; i--)
3836                snd_soc_unregister_dai(dev);
3837
3838        return ret;
3839}
3840EXPORT_SYMBOL_GPL(snd_soc_register_dais);
3841
3842/**
3843 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
3844 *
3845 * @dai: Array of DAIs to unregister
3846 * @count: Number of DAIs
3847 */
3848void snd_soc_unregister_dais(struct device *dev, size_t count)
3849{
3850        int i;
3851
3852        for (i = 0; i < count; i++)
3853                snd_soc_unregister_dai(dev);
3854}
3855EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);
3856
3857/**
3858 * snd_soc_register_platform - Register a platform with the ASoC core
3859 *
3860 * @platform: platform to register
3861 */
3862int snd_soc_register_platform(struct device *dev,
3863                struct snd_soc_platform_driver *platform_drv)
3864{
3865        struct snd_soc_platform *platform;
3866
3867        dev_dbg(dev, "platform register %s\n", dev_name(dev));
3868
3869        platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3870        if (platform == NULL)
3871                return -ENOMEM;
3872
3873        /* create platform component name */
3874        platform->name = fmt_single_name(dev, &platform->id);
3875        if (platform->name == NULL) {
3876                kfree(platform);
3877                return -ENOMEM;
3878        }
3879
3880        platform->dev = dev;
3881        platform->driver = platform_drv;
3882        platform->dapm.dev = dev;
3883        platform->dapm.platform = platform;
3884        platform->dapm.stream_event = platform_drv->stream_event;
3885        mutex_init(&platform->mutex);
3886
3887        mutex_lock(&client_mutex);
3888        list_add(&platform->list, &platform_list);
3889        mutex_unlock(&client_mutex);
3890
3891        pr_debug("Registered platform '%s'\n", platform->name);
3892
3893        return 0;
3894}
3895EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3896
3897/**
3898 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3899 *
3900 * @platform: platform to unregister
3901 */
3902void snd_soc_unregister_platform(struct device *dev)
3903{
3904        struct snd_soc_platform *platform;
3905
3906        list_for_each_entry(platform, &platform_list, list) {
3907                if (dev == platform->dev)
3908                        goto found;
3909        }
3910        return;
3911
3912found:
3913        mutex_lock(&client_mutex);
3914        list_del(&platform->list);
3915        mutex_unlock(&client_mutex);
3916
3917        pr_debug("Unregistered platform '%s'\n", platform->name);
3918        kfree(platform->name);
3919        kfree(platform);
3920}
3921EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3922
3923static u64 codec_format_map[] = {
3924        SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3925        SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3926        SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3927        SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3928        SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3929        SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3930        SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3931        SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3932        SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3933        SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3934        SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3935        SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3936        SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3937        SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3938        SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3939        | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3940};
3941
3942/* Fix up the DAI formats for endianness: codecs don't actually see
3943 * the endianness of the data but we're using the CPU format
3944 * definitions which do need to include endianness so we ensure that
3945 * codec DAIs always have both big and little endian variants set.
3946 */
3947static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3948{
3949        int i;
3950
3951        for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3952                if (stream->formats & codec_format_map[i])
3953                        stream->formats |= codec_format_map[i];
3954}
3955
3956/**
3957 * snd_soc_register_codec - Register a codec with the ASoC core
3958 *
3959 * @codec: codec to register
3960 */
3961int snd_soc_register_codec(struct device *dev,
3962                           const struct snd_soc_codec_driver *codec_drv,
3963                           struct snd_soc_dai_driver *dai_drv,
3964                           int num_dai)
3965{
3966        size_t reg_size;
3967        struct snd_soc_codec *codec;
3968        int ret, i;
3969
3970        dev_dbg(dev, "codec register %s\n", dev_name(dev));
3971
3972        codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3973        if (codec == NULL)
3974                return -ENOMEM;
3975
3976        /* create CODEC component name */
3977        codec->name = fmt_single_name(dev, &codec->id);
3978        if (codec->name == NULL) {
3979                kfree(codec);
3980                return -ENOMEM;
3981        }
3982
3983        if (codec_drv->compress_type)
3984                codec->compress_type = codec_drv->compress_type;
3985        else
3986                codec->compress_type = SND_SOC_FLAT_COMPRESSION;
3987
3988        codec->write = codec_drv->write;
3989        codec->read = codec_drv->read;
3990        codec->volatile_register = codec_drv->volatile_register;
3991        codec->readable_register = codec_drv->readable_register;
3992        codec->writable_register = codec_drv->writable_register;
3993        codec->ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3994        codec->dapm.bias_level = SND_SOC_BIAS_OFF;
3995        codec->dapm.dev = dev;
3996        codec->dapm.codec = codec;
3997        codec->dapm.seq_notifier = codec_drv->seq_notifier;
3998        codec->dapm.stream_event = codec_drv->stream_event;
3999        codec->dev = dev;
4000        codec->driver = codec_drv;
4001        codec->num_dai = num_dai;
4002        mutex_init(&codec->mutex);
4003
4004        /* allocate CODEC register cache */
4005        if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
4006                reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
4007                codec->reg_size = reg_size;
4008                /* it is necessary to make a copy of the default register cache
4009                 * because in the case of using a compression type that requires
4010                 * the default register cache to be marked as __devinitconst the
4011                 * kernel might have freed the array by the time we initialize
4012                 * the cache.
4013                 */
4014                if (codec_drv->reg_cache_default) {
4015                        codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
4016                                                      reg_size, GFP_KERNEL);
4017                        if (!codec->reg_def_copy) {
4018                                ret = -ENOMEM;
4019                                goto fail;
4020                        }
4021                }
4022        }
4023
4024        if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
4025                if (!codec->volatile_register)
4026                        codec->volatile_register = snd_soc_default_volatile_register;
4027                if (!codec->readable_register)
4028                        codec->readable_register = snd_soc_default_readable_register;
4029                if (!codec->writable_register)
4030                        codec->writable_register = snd_soc_default_writable_register;
4031        }
4032
4033        for (i = 0; i < num_dai; i++) {
4034                fixup_codec_formats(&dai_drv[i].playback);
4035                fixup_codec_formats(&dai_drv[i].capture);
4036        }
4037
4038        mutex_lock(&client_mutex);
4039        list_add(&codec->list, &codec_list);
4040        mutex_unlock(&client_mutex);
4041
4042        /* register any DAIs */
4043        if (num_dai) {
4044                ret = snd_soc_register_dais(dev, dai_drv, num_dai);
4045                if (ret < 0)
4046                        dev_err(codec->dev, "Failed to regster DAIs: %d\n",
4047                                ret);
4048        }
4049
4050        pr_debug("Registered codec '%s'\n", codec->name);
4051        return 0;
4052
4053fail:
4054        kfree(codec->name);
4055        kfree(codec);
4056        return ret;
4057}
4058EXPORT_SYMBOL_GPL(snd_soc_register_codec);
4059
4060/**
4061 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
4062 *
4063 * @codec: codec to unregister
4064 */
4065void snd_soc_unregister_codec(struct device *dev)
4066{
4067        struct snd_soc_codec *codec;
4068        int i;
4069
4070        list_for_each_entry(codec, &codec_list, list) {
4071                if (dev == codec->dev)
4072                        goto found;
4073        }
4074        return;
4075
4076found:
4077        if (codec->num_dai)
4078                for (i = 0; i < codec->num_dai; i++)
4079                        snd_soc_unregister_dai(dev);
4080
4081        mutex_lock(&client_mutex);
4082        list_del(&codec->list);
4083        mutex_unlock(&client_mutex);
4084
4085        pr_debug("Unregistered codec '%s'\n", codec->name);
4086
4087        snd_soc_cache_exit(codec);
4088        kfree(codec->reg_def_copy);
4089        kfree(codec->name);
4090        kfree(codec);
4091}
4092EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
4093
4094/* Retrieve a card's name from device tree */
4095int snd_soc_of_parse_card_name(struct snd_soc_card *card,
4096                               const char *propname)
4097{
4098        struct device_node *np = card->dev->of_node;
4099        int ret;
4100
4101        ret = of_property_read_string_index(np, propname, 0, &card->name);
4102        /*
4103         * EINVAL means the property does not exist. This is fine providing
4104         * card->name was previously set, which is checked later in
4105         * snd_soc_register_card.
4106         */
4107        if (ret < 0 && ret != -EINVAL) {
4108                dev_err(card->dev,
4109                        "Property '%s' could not be read: %d\n",
4110                        propname, ret);
4111                return ret;
4112        }
4113
4114        return 0;
4115}
4116EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
4117
4118int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4119                                   const char *propname)
4120{
4121        struct device_node *np = card->dev->of_node;
4122        int num_routes;
4123        struct snd_soc_dapm_route *routes;
4124        int i, ret;
4125
4126        num_routes = of_property_count_strings(np, propname);
4127        if (num_routes < 0 || num_routes & 1) {
4128                dev_err(card->dev,
4129                     "Property '%s' does not exist or its length is not even\n",
4130                     propname);
4131                return -EINVAL;
4132        }
4133        num_routes /= 2;
4134        if (!num_routes) {
4135                dev_err(card->dev,
4136                        "Property '%s's length is zero\n",
4137                        propname);
4138                return -EINVAL;
4139        }
4140
4141        routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4142                              GFP_KERNEL);
4143        if (!routes) {
4144                dev_err(card->dev,
4145                        "Could not allocate DAPM route table\n");
4146                return -EINVAL;
4147        }
4148
4149        for (i = 0; i < num_routes; i++) {
4150                ret = of_property_read_string_index(np, propname,
4151                        2 * i, &routes[i].sink);
4152                if (ret) {
4153                        dev_err(card->dev,
4154                                "Property '%s' index %d could not be read: %d\n",
4155                                propname, 2 * i, ret);
4156                        kfree(routes);
4157                        return -EINVAL;
4158                }
4159                ret = of_property_read_string_index(np, propname,
4160                        (2 * i) + 1, &routes[i].source);
4161                if (ret) {
4162                        dev_err(card->dev,
4163                                "Property '%s' index %d could not be read: %d\n",
4164                                propname, (2 * i) + 1, ret);
4165                        kfree(routes);
4166                        return -EINVAL;
4167                }
4168        }
4169
4170        card->num_dapm_routes = num_routes;
4171        card->dapm_routes = routes;
4172
4173        return 0;
4174}
4175EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4176
4177static int __init snd_soc_init(void)
4178{
4179#ifdef CONFIG_DEBUG_FS
4180        snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
4181        if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
4182                pr_warn("ASoC: Failed to create debugfs directory\n");
4183                snd_soc_debugfs_root = NULL;
4184        }
4185
4186        if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
4187                                 &codec_list_fops))
4188                pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
4189
4190        if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
4191                                 &dai_list_fops))
4192                pr_warn("ASoC: Failed to create DAI list debugfs file\n");
4193
4194        if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
4195                                 &platform_list_fops))
4196                pr_warn("ASoC: Failed to create platform list debugfs file\n");
4197#endif
4198
4199        snd_soc_util_init();
4200
4201        return platform_driver_register(&soc_driver);
4202}
4203module_init(snd_soc_init);
4204
4205static void __exit snd_soc_exit(void)
4206{
4207        snd_soc_util_exit();
4208
4209#ifdef CONFIG_DEBUG_FS
4210        debugfs_remove_recursive(snd_soc_debugfs_root);
4211#endif
4212        platform_driver_unregister(&soc_driver);
4213}
4214module_exit(snd_soc_exit);
4215
4216/* Module information */
4217MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4218MODULE_DESCRIPTION("ALSA SoC Core");
4219MODULE_LICENSE("GPL");
4220MODULE_ALIAS("platform:soc-audio");
4221
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.