linux/sound/soc/codecs/ak4641.c
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   1/*
   2 * ak4641.c  --  AK4641 ALSA Soc Audio driver
   3 *
   4 * Copyright (C) 2008 Harald Welte <laforge@gnufiish.org>
   5 * Copyright (C) 2011 Dmitry Artamonow <mad_soft@inbox.ru>
   6 *
   7 * Based on ak4535.c by Richard Purdie
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License version 2 as
  11 * published by the Free Software Foundation.
  12 */
  13
  14#include <linux/module.h>
  15#include <linux/init.h>
  16#include <linux/delay.h>
  17#include <linux/gpio.h>
  18#include <linux/pm.h>
  19#include <linux/i2c.h>
  20#include <linux/regmap.h>
  21#include <linux/slab.h>
  22#include <sound/core.h>
  23#include <sound/pcm.h>
  24#include <sound/pcm_params.h>
  25#include <sound/soc.h>
  26#include <sound/initval.h>
  27#include <sound/tlv.h>
  28#include <sound/ak4641.h>
  29
  30#include "ak4641.h"
  31
  32/* codec private data */
  33struct ak4641_priv {
  34        struct regmap *regmap;
  35        unsigned int sysclk;
  36        int deemph;
  37        int playback_fs;
  38};
  39
  40/*
  41 * ak4641 register cache
  42 */
  43static const struct reg_default ak4641_reg_defaults[] = {
  44        {  0, 0x00 }, {  1, 0x80 }, {  2, 0x00 }, {  3, 0x80 },
  45        {  4, 0x02 }, {  5, 0x00 }, {  6, 0x11 }, {  7, 0x05 },
  46        {  8, 0x00 }, {  9, 0x00 }, { 10, 0x36 }, { 11, 0x10 },
  47        { 12, 0x00 }, { 13, 0x00 }, { 14, 0x57 }, { 15, 0x00 },
  48        { 16, 0x88 }, { 17, 0x88 }, { 18, 0x08 }, { 19, 0x08 }
  49};
  50
  51static const int deemph_settings[] = {44100, 0, 48000, 32000};
  52
  53static int ak4641_set_deemph(struct snd_soc_codec *codec)
  54{
  55        struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  56        int i, best = 0;
  57
  58        for (i = 0 ; i < ARRAY_SIZE(deemph_settings); i++) {
  59                /* if deemphasis is on, select the nearest available rate */
  60                if (ak4641->deemph && deemph_settings[i] != 0 &&
  61                    abs(deemph_settings[i] - ak4641->playback_fs) <
  62                    abs(deemph_settings[best] - ak4641->playback_fs))
  63                        best = i;
  64
  65                if (!ak4641->deemph && deemph_settings[i] == 0)
  66                        best = i;
  67        }
  68
  69        dev_dbg(codec->dev, "Set deemphasis %d\n", best);
  70
  71        return snd_soc_update_bits(codec, AK4641_DAC, 0x3, best);
  72}
  73
  74static int ak4641_put_deemph(struct snd_kcontrol *kcontrol,
  75                                struct snd_ctl_elem_value *ucontrol)
  76{
  77        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
  78        struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  79        int deemph = ucontrol->value.integer.value[0];
  80
  81        if (deemph > 1)
  82                return -EINVAL;
  83
  84        ak4641->deemph = deemph;
  85
  86        return ak4641_set_deemph(codec);
  87}
  88
  89static int ak4641_get_deemph(struct snd_kcontrol *kcontrol,
  90                                struct snd_ctl_elem_value *ucontrol)
  91{
  92        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
  93        struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
  94
  95        ucontrol->value.integer.value[0] = ak4641->deemph;
  96        return 0;
  97};
  98
  99static const char *ak4641_mono_out[] = {"(L + R)/2", "Hi-Z"};
 100static const char *ak4641_hp_out[] = {"Stereo", "Mono"};
 101static const char *ak4641_mic_select[] = {"Internal", "External"};
 102static const char *ak4641_mic_or_dac[] = {"Microphone", "Voice DAC"};
 103
 104
 105static const DECLARE_TLV_DB_SCALE(mono_gain_tlv, -1700, 2300, 0);
 106static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 2000, 0);
 107static const DECLARE_TLV_DB_SCALE(eq_tlv, -1050, 150, 0);
 108static const DECLARE_TLV_DB_SCALE(master_tlv, -12750, 50, 0);
 109static const DECLARE_TLV_DB_SCALE(mic_stereo_sidetone_tlv, -2700, 300, 0);
 110static const DECLARE_TLV_DB_SCALE(mic_mono_sidetone_tlv, -400, 400, 0);
 111static const DECLARE_TLV_DB_SCALE(capture_tlv, -800, 50, 0);
 112static const DECLARE_TLV_DB_SCALE(alc_tlv, -800, 50, 0);
 113static const DECLARE_TLV_DB_SCALE(aux_in_tlv, -2100, 300, 0);
 114
 115
 116static SOC_ENUM_SINGLE_DECL(ak4641_mono_out_enum,
 117                            AK4641_SIG1, 6, ak4641_mono_out);
 118static SOC_ENUM_SINGLE_DECL(ak4641_hp_out_enum,
 119                            AK4641_MODE2, 2, ak4641_hp_out);
 120static SOC_ENUM_SINGLE_DECL(ak4641_mic_select_enum,
 121                            AK4641_MIC, 1, ak4641_mic_select);
 122static SOC_ENUM_SINGLE_DECL(ak4641_mic_or_dac_enum,
 123                            AK4641_BTIF, 4, ak4641_mic_or_dac);
 124
 125static const struct snd_kcontrol_new ak4641_snd_controls[] = {
 126        SOC_ENUM("Mono 1 Output", ak4641_mono_out_enum),
 127        SOC_SINGLE_TLV("Mono 1 Gain Volume", AK4641_SIG1, 7, 1, 1,
 128                                                        mono_gain_tlv),
 129        SOC_ENUM("Headphone Output", ak4641_hp_out_enum),
 130        SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 131                                        ak4641_get_deemph, ak4641_put_deemph),
 132
 133        SOC_SINGLE_TLV("Mic Boost Volume", AK4641_MIC, 0, 1, 0, mic_boost_tlv),
 134
 135        SOC_SINGLE("ALC Operation Time", AK4641_TIMER, 0, 3, 0),
 136        SOC_SINGLE("ALC Recovery Time", AK4641_TIMER, 2, 3, 0),
 137        SOC_SINGLE("ALC ZC Time", AK4641_TIMER, 4, 3, 0),
 138
 139        SOC_SINGLE("ALC 1 Switch", AK4641_ALC1, 5, 1, 0),
 140
 141        SOC_SINGLE_TLV("ALC Volume", AK4641_ALC2, 0, 71, 0, alc_tlv),
 142        SOC_SINGLE("Left Out Enable Switch", AK4641_SIG2, 1, 1, 0),
 143        SOC_SINGLE("Right Out Enable Switch", AK4641_SIG2, 0, 1, 0),
 144
 145        SOC_SINGLE_TLV("Capture Volume", AK4641_PGA, 0, 71, 0, capture_tlv),
 146
 147        SOC_DOUBLE_R_TLV("Master Playback Volume", AK4641_LATT,
 148                                AK4641_RATT, 0, 255, 1, master_tlv),
 149
 150        SOC_SINGLE_TLV("AUX In Volume", AK4641_VOL, 0, 15, 0, aux_in_tlv),
 151
 152        SOC_SINGLE("Equalizer Switch", AK4641_DAC, 2, 1, 0),
 153        SOC_SINGLE_TLV("EQ1 100 Hz Volume", AK4641_EQLO, 0, 15, 1, eq_tlv),
 154        SOC_SINGLE_TLV("EQ2 250 Hz Volume", AK4641_EQLO, 4, 15, 1, eq_tlv),
 155        SOC_SINGLE_TLV("EQ3 1 kHz Volume", AK4641_EQMID, 0, 15, 1, eq_tlv),
 156        SOC_SINGLE_TLV("EQ4 3.5 kHz Volume", AK4641_EQMID, 4, 15, 1, eq_tlv),
 157        SOC_SINGLE_TLV("EQ5 10 kHz Volume", AK4641_EQHI, 0, 15, 1, eq_tlv),
 158};
 159
 160/* Mono 1 Mixer */
 161static const struct snd_kcontrol_new ak4641_mono1_mixer_controls[] = {
 162        SOC_DAPM_SINGLE_TLV("Mic Mono Sidetone Volume", AK4641_VOL, 7, 1, 0,
 163                                                mic_mono_sidetone_tlv),
 164        SOC_DAPM_SINGLE("Mic Mono Sidetone Switch", AK4641_SIG1, 4, 1, 0),
 165        SOC_DAPM_SINGLE("Mono Playback Switch", AK4641_SIG1, 5, 1, 0),
 166};
 167
 168/* Stereo Mixer */
 169static const struct snd_kcontrol_new ak4641_stereo_mixer_controls[] = {
 170        SOC_DAPM_SINGLE_TLV("Mic Sidetone Volume", AK4641_VOL, 4, 7, 0,
 171                                                mic_stereo_sidetone_tlv),
 172        SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4641_SIG2, 4, 1, 0),
 173        SOC_DAPM_SINGLE("Playback Switch", AK4641_SIG2, 7, 1, 0),
 174        SOC_DAPM_SINGLE("Aux Bypass Switch", AK4641_SIG2, 5, 1, 0),
 175};
 176
 177/* Input Mixer */
 178static const struct snd_kcontrol_new ak4641_input_mixer_controls[] = {
 179        SOC_DAPM_SINGLE("Mic Capture Switch", AK4641_MIC, 2, 1, 0),
 180        SOC_DAPM_SINGLE("Aux Capture Switch", AK4641_MIC, 5, 1, 0),
 181};
 182
 183/* Mic mux */
 184static const struct snd_kcontrol_new ak4641_mic_mux_control =
 185        SOC_DAPM_ENUM("Mic Select", ak4641_mic_select_enum);
 186
 187/* Input mux */
 188static const struct snd_kcontrol_new ak4641_input_mux_control =
 189        SOC_DAPM_ENUM("Input Select", ak4641_mic_or_dac_enum);
 190
 191/* mono 2 switch */
 192static const struct snd_kcontrol_new ak4641_mono2_control =
 193        SOC_DAPM_SINGLE("Switch", AK4641_SIG1, 0, 1, 0);
 194
 195/* ak4641 dapm widgets */
 196static const struct snd_soc_dapm_widget ak4641_dapm_widgets[] = {
 197        SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
 198                &ak4641_stereo_mixer_controls[0],
 199                ARRAY_SIZE(ak4641_stereo_mixer_controls)),
 200        SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
 201                &ak4641_mono1_mixer_controls[0],
 202                ARRAY_SIZE(ak4641_mono1_mixer_controls)),
 203        SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
 204                &ak4641_input_mixer_controls[0],
 205                ARRAY_SIZE(ak4641_input_mixer_controls)),
 206        SND_SOC_DAPM_MUX("Mic Mux", SND_SOC_NOPM, 0, 0,
 207                &ak4641_mic_mux_control),
 208        SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
 209                &ak4641_input_mux_control),
 210        SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
 211                &ak4641_mono2_control),
 212
 213        SND_SOC_DAPM_OUTPUT("LOUT"),
 214        SND_SOC_DAPM_OUTPUT("ROUT"),
 215        SND_SOC_DAPM_OUTPUT("MOUT1"),
 216        SND_SOC_DAPM_OUTPUT("MOUT2"),
 217        SND_SOC_DAPM_OUTPUT("MICOUT"),
 218
 219        SND_SOC_DAPM_ADC("ADC", "HiFi Capture", AK4641_PM1, 0, 0),
 220        SND_SOC_DAPM_PGA("Mic", AK4641_PM1, 1, 0, NULL, 0),
 221        SND_SOC_DAPM_PGA("AUX In", AK4641_PM1, 2, 0, NULL, 0),
 222        SND_SOC_DAPM_PGA("Mono Out", AK4641_PM1, 3, 0, NULL, 0),
 223        SND_SOC_DAPM_PGA("Line Out", AK4641_PM1, 4, 0, NULL, 0),
 224
 225        SND_SOC_DAPM_DAC("DAC", "HiFi Playback", AK4641_PM2, 0, 0),
 226        SND_SOC_DAPM_PGA("Mono Out 2", AK4641_PM2, 3, 0, NULL, 0),
 227
 228        SND_SOC_DAPM_ADC("Voice ADC", "Voice Capture", AK4641_BTIF, 0, 0),
 229        SND_SOC_DAPM_DAC("Voice DAC", "Voice Playback", AK4641_BTIF, 1, 0),
 230
 231        SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4641_MIC, 3, 0),
 232        SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4641_MIC, 4, 0),
 233
 234        SND_SOC_DAPM_INPUT("MICIN"),
 235        SND_SOC_DAPM_INPUT("MICEXT"),
 236        SND_SOC_DAPM_INPUT("AUX"),
 237        SND_SOC_DAPM_INPUT("AIN"),
 238};
 239
 240static const struct snd_soc_dapm_route ak4641_audio_map[] = {
 241        /* Stereo Mixer */
 242        {"Stereo Mixer", "Playback Switch", "DAC"},
 243        {"Stereo Mixer", "Mic Sidetone Switch", "Input Mux"},
 244        {"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
 245
 246        /* Mono 1 Mixer */
 247        {"Mono1 Mixer", "Mic Mono Sidetone Switch", "Input Mux"},
 248        {"Mono1 Mixer", "Mono Playback Switch", "DAC"},
 249
 250        /* Mic */
 251        {"Mic", NULL, "AIN"},
 252        {"Mic Mux", "Internal", "Mic Int Bias"},
 253        {"Mic Mux", "External", "Mic Ext Bias"},
 254        {"Mic Int Bias", NULL, "MICIN"},
 255        {"Mic Ext Bias", NULL, "MICEXT"},
 256        {"MICOUT", NULL, "Mic Mux"},
 257
 258        /* Input Mux */
 259        {"Input Mux", "Microphone", "Mic"},
 260        {"Input Mux", "Voice DAC", "Voice DAC"},
 261
 262        /* Line Out */
 263        {"LOUT", NULL, "Line Out"},
 264        {"ROUT", NULL, "Line Out"},
 265        {"Line Out", NULL, "Stereo Mixer"},
 266
 267        /* Mono 1 Out */
 268        {"MOUT1", NULL, "Mono Out"},
 269        {"Mono Out", NULL, "Mono1 Mixer"},
 270
 271        /* Mono 2 Out */
 272        {"MOUT2", NULL, "Mono 2 Enable"},
 273        {"Mono 2 Enable", "Switch", "Mono Out 2"},
 274        {"Mono Out 2", NULL, "Stereo Mixer"},
 275
 276        {"Voice ADC", NULL, "Mono 2 Enable"},
 277
 278        /* Aux In */
 279        {"AUX In", NULL, "AUX"},
 280
 281        /* ADC */
 282        {"ADC", NULL, "Input Mixer"},
 283        {"Input Mixer", "Mic Capture Switch", "Mic"},
 284        {"Input Mixer", "Aux Capture Switch", "AUX In"},
 285};
 286
 287static int ak4641_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 288        int clk_id, unsigned int freq, int dir)
 289{
 290        struct snd_soc_codec *codec = codec_dai->codec;
 291        struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
 292
 293        ak4641->sysclk = freq;
 294        return 0;
 295}
 296
 297static int ak4641_i2s_hw_params(struct snd_pcm_substream *substream,
 298                                 struct snd_pcm_hw_params *params,
 299                                 struct snd_soc_dai *dai)
 300{
 301        struct snd_soc_codec *codec = dai->codec;
 302        struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
 303        int rate = params_rate(params), fs = 256;
 304        u8 mode2;
 305
 306        if (rate)
 307                fs = ak4641->sysclk / rate;
 308        else
 309                return -EINVAL;
 310
 311        /* set fs */
 312        switch (fs) {
 313        case 1024:
 314                mode2 = (0x2 << 5);
 315                break;
 316        case 512:
 317                mode2 = (0x1 << 5);
 318                break;
 319        case 256:
 320                mode2 = (0x0 << 5);
 321                break;
 322        default:
 323                dev_err(codec->dev, "Error: unsupported fs=%d\n", fs);
 324                return -EINVAL;
 325        }
 326
 327        snd_soc_update_bits(codec, AK4641_MODE2, (0x3 << 5), mode2);
 328
 329        /* Update de-emphasis filter for the new rate */
 330        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 331                ak4641->playback_fs = rate;
 332                ak4641_set_deemph(codec);
 333        }
 334
 335        return 0;
 336}
 337
 338static int ak4641_pcm_set_dai_fmt(struct snd_soc_dai *codec_dai,
 339                                  unsigned int fmt)
 340{
 341        struct snd_soc_codec *codec = codec_dai->codec;
 342        u8 btif;
 343        int ret;
 344
 345        /* interface format */
 346        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 347        case SND_SOC_DAIFMT_I2S:
 348                btif = (0x3 << 5);
 349                break;
 350        case SND_SOC_DAIFMT_LEFT_J:
 351                btif = (0x2 << 5);
 352                break;
 353        case SND_SOC_DAIFMT_DSP_A:      /* MSB after FRM */
 354                btif = (0x0 << 5);
 355                break;
 356        case SND_SOC_DAIFMT_DSP_B:      /* MSB during FRM */
 357                btif = (0x1 << 5);
 358                break;
 359        default:
 360                return -EINVAL;
 361        }
 362
 363        ret = snd_soc_update_bits(codec, AK4641_BTIF, (0x3 << 5), btif);
 364        if (ret < 0)
 365                return ret;
 366
 367        return 0;
 368}
 369
 370static int ak4641_i2s_set_dai_fmt(struct snd_soc_dai *codec_dai,
 371                unsigned int fmt)
 372{
 373        struct snd_soc_codec *codec = codec_dai->codec;
 374        u8 mode1 = 0;
 375
 376        /* interface format */
 377        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 378        case SND_SOC_DAIFMT_I2S:
 379                mode1 = 0x02;
 380                break;
 381        case SND_SOC_DAIFMT_LEFT_J:
 382                mode1 = 0x01;
 383                break;
 384        default:
 385                return -EINVAL;
 386        }
 387
 388        return snd_soc_write(codec, AK4641_MODE1, mode1);
 389}
 390
 391static int ak4641_mute(struct snd_soc_dai *dai, int mute)
 392{
 393        struct snd_soc_codec *codec = dai->codec;
 394
 395        return snd_soc_update_bits(codec, AK4641_DAC, 0x20, mute ? 0x20 : 0);
 396}
 397
 398static int ak4641_set_bias_level(struct snd_soc_codec *codec,
 399        enum snd_soc_bias_level level)
 400{
 401        struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
 402        struct ak4641_platform_data *pdata = codec->dev->platform_data;
 403        int ret;
 404
 405        switch (level) {
 406        case SND_SOC_BIAS_ON:
 407                /* unmute */
 408                snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0);
 409                break;
 410        case SND_SOC_BIAS_PREPARE:
 411                /* mute */
 412                snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0x20);
 413                break;
 414        case SND_SOC_BIAS_STANDBY:
 415                if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
 416                        if (pdata && gpio_is_valid(pdata->gpio_power))
 417                                gpio_set_value(pdata->gpio_power, 1);
 418                        mdelay(1);
 419                        if (pdata && gpio_is_valid(pdata->gpio_npdn))
 420                                gpio_set_value(pdata->gpio_npdn, 1);
 421                        mdelay(1);
 422
 423                        ret = regcache_sync(ak4641->regmap);
 424                        if (ret) {
 425                                dev_err(codec->dev,
 426                                        "Failed to sync cache: %d\n", ret);
 427                                return ret;
 428                        }
 429                }
 430                snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0x80);
 431                snd_soc_update_bits(codec, AK4641_PM2, 0x80, 0);
 432                break;
 433        case SND_SOC_BIAS_OFF:
 434                snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0);
 435                if (pdata && gpio_is_valid(pdata->gpio_npdn))
 436                        gpio_set_value(pdata->gpio_npdn, 0);
 437                if (pdata && gpio_is_valid(pdata->gpio_power))
 438                        gpio_set_value(pdata->gpio_power, 0);
 439                regcache_mark_dirty(ak4641->regmap);
 440                break;
 441        }
 442        return 0;
 443}
 444
 445#define AK4641_RATES    (SNDRV_PCM_RATE_8000_48000)
 446#define AK4641_RATES_BT (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 447                         SNDRV_PCM_RATE_16000)
 448#define AK4641_FORMATS  (SNDRV_PCM_FMTBIT_S16_LE)
 449
 450static const struct snd_soc_dai_ops ak4641_i2s_dai_ops = {
 451        .hw_params    = ak4641_i2s_hw_params,
 452        .set_fmt      = ak4641_i2s_set_dai_fmt,
 453        .digital_mute = ak4641_mute,
 454        .set_sysclk   = ak4641_set_dai_sysclk,
 455};
 456
 457static const struct snd_soc_dai_ops ak4641_pcm_dai_ops = {
 458        .hw_params    = NULL, /* rates are controlled by BT chip */
 459        .set_fmt      = ak4641_pcm_set_dai_fmt,
 460        .digital_mute = ak4641_mute,
 461        .set_sysclk   = ak4641_set_dai_sysclk,
 462};
 463
 464static struct snd_soc_dai_driver ak4641_dai[] = {
 465{
 466        .name = "ak4641-hifi",
 467        .id = 1,
 468        .playback = {
 469                .stream_name = "HiFi Playback",
 470                .channels_min = 1,
 471                .channels_max = 2,
 472                .rates = AK4641_RATES,
 473                .formats = AK4641_FORMATS,
 474        },
 475        .capture = {
 476                .stream_name = "HiFi Capture",
 477                .channels_min = 1,
 478                .channels_max = 2,
 479                .rates = AK4641_RATES,
 480                .formats = AK4641_FORMATS,
 481        },
 482        .ops = &ak4641_i2s_dai_ops,
 483        .symmetric_rates = 1,
 484},
 485{
 486        .name = "ak4641-voice",
 487        .id = 1,
 488        .playback = {
 489                .stream_name = "Voice Playback",
 490                .channels_min = 1,
 491                .channels_max = 1,
 492                .rates = AK4641_RATES_BT,
 493                .formats = AK4641_FORMATS,
 494        },
 495        .capture = {
 496                .stream_name = "Voice Capture",
 497                .channels_min = 1,
 498                .channels_max = 1,
 499                .rates = AK4641_RATES_BT,
 500                .formats = AK4641_FORMATS,
 501        },
 502        .ops = &ak4641_pcm_dai_ops,
 503        .symmetric_rates = 1,
 504},
 505};
 506
 507static struct snd_soc_codec_driver soc_codec_dev_ak4641 = {
 508        .component_driver = {
 509                .controls               = ak4641_snd_controls,
 510                .num_controls           = ARRAY_SIZE(ak4641_snd_controls),
 511                .dapm_widgets           = ak4641_dapm_widgets,
 512                .num_dapm_widgets       = ARRAY_SIZE(ak4641_dapm_widgets),
 513                .dapm_routes            = ak4641_audio_map,
 514                .num_dapm_routes        = ARRAY_SIZE(ak4641_audio_map),
 515        },
 516        .set_bias_level         = ak4641_set_bias_level,
 517        .suspend_bias_off       = true,
 518};
 519
 520static const struct regmap_config ak4641_regmap = {
 521        .reg_bits = 8,
 522        .val_bits = 8,
 523
 524        .max_register = AK4641_BTIF,
 525        .reg_defaults = ak4641_reg_defaults,
 526        .num_reg_defaults = ARRAY_SIZE(ak4641_reg_defaults),
 527        .cache_type = REGCACHE_RBTREE,
 528};
 529
 530static int ak4641_i2c_probe(struct i2c_client *i2c,
 531                            const struct i2c_device_id *id)
 532{
 533        struct ak4641_platform_data *pdata = i2c->dev.platform_data;
 534        struct ak4641_priv *ak4641;
 535        int ret;
 536
 537        ak4641 = devm_kzalloc(&i2c->dev, sizeof(struct ak4641_priv),
 538                              GFP_KERNEL);
 539        if (!ak4641)
 540                return -ENOMEM;
 541
 542        ak4641->regmap = devm_regmap_init_i2c(i2c, &ak4641_regmap);
 543        if (IS_ERR(ak4641->regmap))
 544                return PTR_ERR(ak4641->regmap);
 545
 546        if (pdata) {
 547                if (gpio_is_valid(pdata->gpio_power)) {
 548                        ret = gpio_request_one(pdata->gpio_power,
 549                                        GPIOF_OUT_INIT_LOW, "ak4641 power");
 550                        if (ret)
 551                                goto err_out;
 552                }
 553                if (gpio_is_valid(pdata->gpio_npdn)) {
 554                        ret = gpio_request_one(pdata->gpio_npdn,
 555                                        GPIOF_OUT_INIT_LOW, "ak4641 npdn");
 556                        if (ret)
 557                                goto err_gpio;
 558
 559                        udelay(1); /* > 150 ns */
 560                        gpio_set_value(pdata->gpio_npdn, 1);
 561                }
 562        }
 563
 564        i2c_set_clientdata(i2c, ak4641);
 565
 566        ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_ak4641,
 567                                ak4641_dai, ARRAY_SIZE(ak4641_dai));
 568        if (ret != 0)
 569                goto err_gpio2;
 570
 571        return 0;
 572
 573err_gpio2:
 574        if (pdata) {
 575                if (gpio_is_valid(pdata->gpio_power))
 576                        gpio_set_value(pdata->gpio_power, 0);
 577                if (gpio_is_valid(pdata->gpio_npdn))
 578                        gpio_free(pdata->gpio_npdn);
 579        }
 580err_gpio:
 581        if (pdata && gpio_is_valid(pdata->gpio_power))
 582                gpio_free(pdata->gpio_power);
 583err_out:
 584        return ret;
 585}
 586
 587static int ak4641_i2c_remove(struct i2c_client *i2c)
 588{
 589        struct ak4641_platform_data *pdata = i2c->dev.platform_data;
 590
 591        snd_soc_unregister_codec(&i2c->dev);
 592
 593        if (pdata) {
 594                if (gpio_is_valid(pdata->gpio_power)) {
 595                        gpio_set_value(pdata->gpio_power, 0);
 596                        gpio_free(pdata->gpio_power);
 597                }
 598                if (gpio_is_valid(pdata->gpio_npdn))
 599                        gpio_free(pdata->gpio_npdn);
 600        }
 601
 602        return 0;
 603}
 604
 605static const struct i2c_device_id ak4641_i2c_id[] = {
 606        { "ak4641", 0 },
 607        { }
 608};
 609MODULE_DEVICE_TABLE(i2c, ak4641_i2c_id);
 610
 611static struct i2c_driver ak4641_i2c_driver = {
 612        .driver = {
 613                .name = "ak4641",
 614        },
 615        .probe =    ak4641_i2c_probe,
 616        .remove =   ak4641_i2c_remove,
 617        .id_table = ak4641_i2c_id,
 618};
 619
 620module_i2c_driver(ak4641_i2c_driver);
 621
 622MODULE_DESCRIPTION("SoC AK4641 driver");
 623MODULE_AUTHOR("Harald Welte <laforge@gnufiish.org>");
 624MODULE_LICENSE("GPL");
 625