linux/sound/soc/codecs/ak4535.c
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   1/*
   2 * ak4535.c  --  AK4535 ALSA Soc Audio driver
   3 *
   4 * Copyright 2005 Openedhand Ltd.
   5 *
   6 * Author: Richard Purdie <richard@openedhand.com>
   7 *
   8 * Based on wm8753.c by Liam Girdwood
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13 */
  14
  15#include <linux/module.h>
  16#include <linux/moduleparam.h>
  17#include <linux/init.h>
  18#include <linux/delay.h>
  19#include <linux/pm.h>
  20#include <linux/i2c.h>
  21#include <linux/regmap.h>
  22#include <linux/slab.h>
  23#include <sound/core.h>
  24#include <sound/pcm.h>
  25#include <sound/pcm_params.h>
  26#include <sound/soc.h>
  27#include <sound/initval.h>
  28
  29#include "ak4535.h"
  30
  31/* codec private data */
  32struct ak4535_priv {
  33        struct regmap *regmap;
  34        unsigned int sysclk;
  35};
  36
  37/*
  38 * ak4535 register cache
  39 */
  40static const struct reg_default ak4535_reg_defaults[] = {
  41        { 0, 0x00 },
  42        { 1, 0x80 },
  43        { 2, 0x00 },
  44        { 3, 0x03 },
  45        { 4, 0x02 },
  46        { 5, 0x00 },
  47        { 6, 0x11 },
  48        { 7, 0x01 },
  49        { 8, 0x00 },
  50        { 9, 0x40 },
  51        { 10, 0x36 },
  52        { 11, 0x10 },
  53        { 12, 0x00 },
  54        { 13, 0x00 },
  55        { 14, 0x57 },
  56};
  57
  58static bool ak4535_volatile(struct device *dev, unsigned int reg)
  59{
  60        switch (reg) {
  61        case AK4535_STATUS:
  62                return true;
  63        default:
  64                return false;
  65        }
  66}
  67
  68static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
  69static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
  70static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
  71static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
  72static const char *ak4535_mic_select[] = {"Internal", "External"};
  73
  74static const struct soc_enum ak4535_enum[] = {
  75        SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
  76        SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
  77        SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
  78        SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
  79        SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
  80};
  81
  82static const struct snd_kcontrol_new ak4535_snd_controls[] = {
  83        SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
  84        SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
  85        SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
  86        SOC_ENUM("Headphone Output", ak4535_enum[2]),
  87        SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
  88        SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
  89        SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
  90        SOC_ENUM("Mic Select", ak4535_enum[4]),
  91        SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
  92        SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
  93        SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
  94        SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
  95        SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
  96        SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
  97        SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
  98        SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
  99        SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
 100        SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
 101        SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
 102};
 103
 104/* Mono 1 Mixer */
 105static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
 106        SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
 107        SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
 108};
 109
 110/* Stereo Mixer */
 111static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
 112        SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
 113        SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
 114        SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
 115};
 116
 117/* Input Mixer */
 118static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
 119        SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
 120        SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
 121};
 122
 123/* Input mux */
 124static const struct snd_kcontrol_new ak4535_input_mux_control =
 125        SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
 126
 127/* HP L switch */
 128static const struct snd_kcontrol_new ak4535_hpl_control =
 129        SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
 130
 131/* HP R switch */
 132static const struct snd_kcontrol_new ak4535_hpr_control =
 133        SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
 134
 135/* mono 2 switch */
 136static const struct snd_kcontrol_new ak4535_mono2_control =
 137        SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
 138
 139/* Line out switch */
 140static const struct snd_kcontrol_new ak4535_line_control =
 141        SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
 142
 143/* ak4535 dapm widgets */
 144static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
 145        SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
 146                &ak4535_stereo_mixer_controls[0],
 147                ARRAY_SIZE(ak4535_stereo_mixer_controls)),
 148        SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
 149                &ak4535_mono1_mixer_controls[0],
 150                ARRAY_SIZE(ak4535_mono1_mixer_controls)),
 151        SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
 152                &ak4535_input_mixer_controls[0],
 153                ARRAY_SIZE(ak4535_input_mixer_controls)),
 154        SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
 155                &ak4535_input_mux_control),
 156        SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
 157        SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
 158                &ak4535_mono2_control),
 159        /* speaker powersave bit */
 160        SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
 161        SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
 162                &ak4535_line_control),
 163        SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
 164                &ak4535_hpl_control),
 165        SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
 166                &ak4535_hpr_control),
 167        SND_SOC_DAPM_OUTPUT("LOUT"),
 168        SND_SOC_DAPM_OUTPUT("HPL"),
 169        SND_SOC_DAPM_OUTPUT("ROUT"),
 170        SND_SOC_DAPM_OUTPUT("HPR"),
 171        SND_SOC_DAPM_OUTPUT("SPP"),
 172        SND_SOC_DAPM_OUTPUT("SPN"),
 173        SND_SOC_DAPM_OUTPUT("MOUT1"),
 174        SND_SOC_DAPM_OUTPUT("MOUT2"),
 175        SND_SOC_DAPM_OUTPUT("MICOUT"),
 176        SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
 177        SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
 178        SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
 179        SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
 180        SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
 181        SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
 182        SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
 183        SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
 184
 185        SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
 186        SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
 187        SND_SOC_DAPM_INPUT("MICIN"),
 188        SND_SOC_DAPM_INPUT("MICEXT"),
 189        SND_SOC_DAPM_INPUT("AUX"),
 190        SND_SOC_DAPM_INPUT("MIN"),
 191        SND_SOC_DAPM_INPUT("AIN"),
 192};
 193
 194static const struct snd_soc_dapm_route ak4535_audio_map[] = {
 195        /*stereo mixer */
 196        {"Stereo Mixer", "Playback Switch", "DAC"},
 197        {"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
 198        {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
 199
 200        /* mono1 mixer */
 201        {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
 202        {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
 203
 204        /* Mic */
 205        {"Mic", NULL, "AIN"},
 206        {"Input Mux", "Internal", "Mic Int Bias"},
 207        {"Input Mux", "External", "Mic Ext Bias"},
 208        {"Mic Int Bias", NULL, "MICIN"},
 209        {"Mic Ext Bias", NULL, "MICEXT"},
 210        {"MICOUT", NULL, "Input Mux"},
 211
 212        /* line out */
 213        {"LOUT", NULL, "Line Out Enable"},
 214        {"ROUT", NULL, "Line Out Enable"},
 215        {"Line Out Enable", "Switch", "Line Out"},
 216        {"Line Out", NULL, "Stereo Mixer"},
 217
 218        /* mono1 out */
 219        {"MOUT1", NULL, "Mono Out"},
 220        {"Mono Out", NULL, "Mono1 Mixer"},
 221
 222        /* left HP */
 223        {"HPL", NULL, "Left HP Enable"},
 224        {"Left HP Enable", "Switch", "HP L Amp"},
 225        {"HP L Amp", NULL, "Stereo Mixer"},
 226
 227        /* right HP */
 228        {"HPR", NULL, "Right HP Enable"},
 229        {"Right HP Enable", "Switch", "HP R Amp"},
 230        {"HP R Amp", NULL, "Stereo Mixer"},
 231
 232        /* speaker */
 233        {"SPP", NULL, "Speaker Enable"},
 234        {"SPN", NULL, "Speaker Enable"},
 235        {"Speaker Enable", "Switch", "Spk Amp"},
 236        {"Spk Amp", NULL, "MIN"},
 237
 238        /* mono 2 */
 239        {"MOUT2", NULL, "Mono 2 Enable"},
 240        {"Mono 2 Enable", "Switch", "Stereo Mixer"},
 241
 242        /* Aux In */
 243        {"Aux In", NULL, "AUX"},
 244
 245        /* ADC */
 246        {"ADC", NULL, "Input Mixer"},
 247        {"Input Mixer", "Mic Capture Switch", "Mic"},
 248        {"Input Mixer", "Aux Capture Switch", "Aux In"},
 249};
 250
 251static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 252        int clk_id, unsigned int freq, int dir)
 253{
 254        struct snd_soc_codec *codec = codec_dai->codec;
 255        struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
 256
 257        ak4535->sysclk = freq;
 258        return 0;
 259}
 260
 261static int ak4535_hw_params(struct snd_pcm_substream *substream,
 262                            struct snd_pcm_hw_params *params,
 263                            struct snd_soc_dai *dai)
 264{
 265        struct snd_soc_codec *codec = dai->codec;
 266        struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
 267        u8 mode2 = snd_soc_read(codec, AK4535_MODE2) & ~(0x3 << 5);
 268        int rate = params_rate(params), fs = 256;
 269
 270        if (rate)
 271                fs = ak4535->sysclk / rate;
 272
 273        /* set fs */
 274        switch (fs) {
 275        case 1024:
 276                mode2 |= (0x2 << 5);
 277                break;
 278        case 512:
 279                mode2 |= (0x1 << 5);
 280                break;
 281        case 256:
 282                break;
 283        }
 284
 285        /* set rate */
 286        snd_soc_write(codec, AK4535_MODE2, mode2);
 287        return 0;
 288}
 289
 290static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
 291                unsigned int fmt)
 292{
 293        struct snd_soc_codec *codec = codec_dai->codec;
 294        u8 mode1 = 0;
 295
 296        /* interface format */
 297        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 298        case SND_SOC_DAIFMT_I2S:
 299                mode1 = 0x0002;
 300                break;
 301        case SND_SOC_DAIFMT_LEFT_J:
 302                mode1 = 0x0001;
 303                break;
 304        default:
 305                return -EINVAL;
 306        }
 307
 308        /* use 32 fs for BCLK to save power */
 309        mode1 |= 0x4;
 310
 311        snd_soc_write(codec, AK4535_MODE1, mode1);
 312        return 0;
 313}
 314
 315static int ak4535_mute(struct snd_soc_dai *dai, int mute)
 316{
 317        struct snd_soc_codec *codec = dai->codec;
 318        u16 mute_reg = snd_soc_read(codec, AK4535_DAC);
 319        if (!mute)
 320                snd_soc_write(codec, AK4535_DAC, mute_reg & ~0x20);
 321        else
 322                snd_soc_write(codec, AK4535_DAC, mute_reg | 0x20);
 323        return 0;
 324}
 325
 326static int ak4535_set_bias_level(struct snd_soc_codec *codec,
 327        enum snd_soc_bias_level level)
 328{
 329        switch (level) {
 330        case SND_SOC_BIAS_ON:
 331                snd_soc_update_bits(codec, AK4535_DAC, 0x20, 0);
 332                break;
 333        case SND_SOC_BIAS_PREPARE:
 334                snd_soc_update_bits(codec, AK4535_DAC, 0x20, 0x20);
 335                break;
 336        case SND_SOC_BIAS_STANDBY:
 337                snd_soc_update_bits(codec, AK4535_PM1, 0x80, 0x80);
 338                snd_soc_update_bits(codec, AK4535_PM2, 0x80, 0);
 339                break;
 340        case SND_SOC_BIAS_OFF:
 341                snd_soc_update_bits(codec, AK4535_PM1, 0x80, 0);
 342                break;
 343        }
 344        return 0;
 345}
 346
 347#define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 348                SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
 349                SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
 350
 351static const struct snd_soc_dai_ops ak4535_dai_ops = {
 352        .hw_params      = ak4535_hw_params,
 353        .set_fmt        = ak4535_set_dai_fmt,
 354        .digital_mute   = ak4535_mute,
 355        .set_sysclk     = ak4535_set_dai_sysclk,
 356};
 357
 358static struct snd_soc_dai_driver ak4535_dai = {
 359        .name = "ak4535-hifi",
 360        .playback = {
 361                .stream_name = "Playback",
 362                .channels_min = 1,
 363                .channels_max = 2,
 364                .rates = AK4535_RATES,
 365                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 366        .capture = {
 367                .stream_name = "Capture",
 368                .channels_min = 1,
 369                .channels_max = 2,
 370                .rates = AK4535_RATES,
 371                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 372        .ops = &ak4535_dai_ops,
 373};
 374
 375static int ak4535_resume(struct snd_soc_codec *codec)
 376{
 377        snd_soc_cache_sync(codec);
 378        return 0;
 379}
 380
 381static const struct regmap_config ak4535_regmap = {
 382        .reg_bits = 8,
 383        .val_bits = 8,
 384
 385        .max_register = AK4535_STATUS,
 386        .volatile_reg = ak4535_volatile,
 387
 388        .cache_type = REGCACHE_RBTREE,
 389        .reg_defaults = ak4535_reg_defaults,
 390        .num_reg_defaults = ARRAY_SIZE(ak4535_reg_defaults),
 391};
 392
 393static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
 394        .resume =       ak4535_resume,
 395        .set_bias_level = ak4535_set_bias_level,
 396        .suspend_bias_off = true,
 397
 398        .component_driver = {
 399                .controls               = ak4535_snd_controls,
 400                .num_controls           = ARRAY_SIZE(ak4535_snd_controls),
 401                .dapm_widgets           = ak4535_dapm_widgets,
 402                .num_dapm_widgets       = ARRAY_SIZE(ak4535_dapm_widgets),
 403                .dapm_routes            = ak4535_audio_map,
 404                .num_dapm_routes        = ARRAY_SIZE(ak4535_audio_map),
 405        },
 406};
 407
 408static int ak4535_i2c_probe(struct i2c_client *i2c,
 409                            const struct i2c_device_id *id)
 410{
 411        struct ak4535_priv *ak4535;
 412        int ret;
 413
 414        ak4535 = devm_kzalloc(&i2c->dev, sizeof(struct ak4535_priv),
 415                              GFP_KERNEL);
 416        if (ak4535 == NULL)
 417                return -ENOMEM;
 418
 419        ak4535->regmap = devm_regmap_init_i2c(i2c, &ak4535_regmap);
 420        if (IS_ERR(ak4535->regmap)) {
 421                ret = PTR_ERR(ak4535->regmap);
 422                dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
 423                return ret;
 424        }
 425
 426        i2c_set_clientdata(i2c, ak4535);
 427
 428        ret = snd_soc_register_codec(&i2c->dev,
 429                        &soc_codec_dev_ak4535, &ak4535_dai, 1);
 430
 431        return ret;
 432}
 433
 434static int ak4535_i2c_remove(struct i2c_client *client)
 435{
 436        snd_soc_unregister_codec(&client->dev);
 437        return 0;
 438}
 439
 440static const struct i2c_device_id ak4535_i2c_id[] = {
 441        { "ak4535", 0 },
 442        { }
 443};
 444MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
 445
 446static struct i2c_driver ak4535_i2c_driver = {
 447        .driver = {
 448                .name = "ak4535",
 449        },
 450        .probe =    ak4535_i2c_probe,
 451        .remove =   ak4535_i2c_remove,
 452        .id_table = ak4535_i2c_id,
 453};
 454
 455module_i2c_driver(ak4535_i2c_driver);
 456
 457MODULE_DESCRIPTION("Soc AK4535 driver");
 458MODULE_AUTHOR("Richard Purdie");
 459MODULE_LICENSE("GPL");
 460