linux/sound/soc/codecs/cs42l51.c
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   1/*
   2 * cs42l51.c
   3 *
   4 * ASoC Driver for Cirrus Logic CS42L51 codecs
   5 *
   6 * Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
   7 *
   8 * Based on cs4270.c - Copyright (c) Freescale Semiconductor
   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 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * For now:
  20 *  - Only I2C is support. Not SPI
  21 *  - master mode *NOT* supported
  22 */
  23
  24#include <linux/module.h>
  25#include <linux/slab.h>
  26#include <sound/core.h>
  27#include <sound/soc.h>
  28#include <sound/tlv.h>
  29#include <sound/initval.h>
  30#include <sound/pcm_params.h>
  31#include <sound/pcm.h>
  32#include <linux/regmap.h>
  33
  34#include "cs42l51.h"
  35
  36enum master_slave_mode {
  37        MODE_SLAVE,
  38        MODE_SLAVE_AUTO,
  39        MODE_MASTER,
  40};
  41
  42struct cs42l51_private {
  43        unsigned int mclk;
  44        unsigned int audio_mode;        /* The mode (I2S or left-justified) */
  45        enum master_slave_mode func;
  46};
  47
  48#define CS42L51_FORMATS ( \
  49                SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
  50                SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
  51                SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
  52                SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE)
  53
  54static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
  55                        struct snd_ctl_elem_value *ucontrol)
  56{
  57        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
  58        unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
  59
  60        switch (value) {
  61        default:
  62        case 0:
  63                ucontrol->value.integer.value[0] = 0;
  64                break;
  65        /* same value : (L+R)/2 and (R+L)/2 */
  66        case 1:
  67        case 2:
  68                ucontrol->value.integer.value[0] = 1;
  69                break;
  70        case 3:
  71                ucontrol->value.integer.value[0] = 2;
  72                break;
  73        }
  74
  75        return 0;
  76}
  77
  78#define CHAN_MIX_NORMAL 0x00
  79#define CHAN_MIX_BOTH   0x55
  80#define CHAN_MIX_SWAP   0xFF
  81
  82static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
  83                        struct snd_ctl_elem_value *ucontrol)
  84{
  85        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
  86        unsigned char val;
  87
  88        switch (ucontrol->value.integer.value[0]) {
  89        default:
  90        case 0:
  91                val = CHAN_MIX_NORMAL;
  92                break;
  93        case 1:
  94                val = CHAN_MIX_BOTH;
  95                break;
  96        case 2:
  97                val = CHAN_MIX_SWAP;
  98                break;
  99        }
 100
 101        snd_soc_write(codec, CS42L51_PCM_MIXER, val);
 102
 103        return 1;
 104}
 105
 106static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
 107static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
 108
 109static const DECLARE_TLV_DB_SCALE(aout_tlv, -10200, 50, 0);
 110
 111static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
 112static const char *chan_mix[] = {
 113        "L R",
 114        "L+R",
 115        "R L",
 116};
 117
 118static SOC_ENUM_SINGLE_EXT_DECL(cs42l51_chan_mix, chan_mix);
 119
 120static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
 121        SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
 122                        CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
 123                        0, 0x19, 0x7F, adc_pcm_tlv),
 124        SOC_DOUBLE_R("PCM Playback Switch",
 125                        CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
 126        SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
 127                        CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
 128                        0, 0x34, 0xE4, aout_tlv),
 129        SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
 130                        CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
 131                        0, 0x19, 0x7F, adc_pcm_tlv),
 132        SOC_DOUBLE_R("ADC Mixer Switch",
 133                        CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
 134        SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
 135        SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
 136        SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
 137        SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
 138        SOC_DOUBLE_TLV("Mic Boost Volume",
 139                        CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
 140        SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
 141        SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
 142        SOC_ENUM_EXT("PCM channel mixer",
 143                        cs42l51_chan_mix,
 144                        cs42l51_get_chan_mix, cs42l51_set_chan_mix),
 145};
 146
 147/*
 148 * to power down, one must:
 149 * 1.) Enable the PDN bit
 150 * 2.) enable power-down for the select channels
 151 * 3.) disable the PDN bit.
 152 */
 153static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
 154                struct snd_kcontrol *kcontrol, int event)
 155{
 156        struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
 157
 158        switch (event) {
 159        case SND_SOC_DAPM_PRE_PMD:
 160                snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
 161                                    CS42L51_POWER_CTL1_PDN,
 162                                    CS42L51_POWER_CTL1_PDN);
 163                break;
 164        default:
 165        case SND_SOC_DAPM_POST_PMD:
 166                snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
 167                                    CS42L51_POWER_CTL1_PDN, 0);
 168                break;
 169        }
 170
 171        return 0;
 172}
 173
 174static const char *cs42l51_dac_names[] = {"Direct PCM",
 175        "DSP PCM", "ADC"};
 176static SOC_ENUM_SINGLE_DECL(cs42l51_dac_mux_enum,
 177                            CS42L51_DAC_CTL, 6, cs42l51_dac_names);
 178static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
 179        SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
 180
 181static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
 182        "MIC Left", "MIC+preamp Left"};
 183static SOC_ENUM_SINGLE_DECL(cs42l51_adcl_mux_enum,
 184                            CS42L51_ADC_INPUT, 4, cs42l51_adcl_names);
 185static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
 186        SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
 187
 188static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
 189        "MIC Right", "MIC+preamp Right"};
 190static SOC_ENUM_SINGLE_DECL(cs42l51_adcr_mux_enum,
 191                            CS42L51_ADC_INPUT, 6, cs42l51_adcr_names);
 192static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
 193        SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
 194
 195static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
 196        SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
 197        SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
 198                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 199        SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
 200                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 201        SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
 202                CS42L51_POWER_CTL1, 1, 1,
 203                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 204        SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
 205                CS42L51_POWER_CTL1, 2, 1,
 206                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 207        SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
 208                CS42L51_POWER_CTL1, 5, 1,
 209                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 210        SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
 211                CS42L51_POWER_CTL1, 6, 1,
 212                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 213
 214        /* analog/mic */
 215        SND_SOC_DAPM_INPUT("AIN1L"),
 216        SND_SOC_DAPM_INPUT("AIN1R"),
 217        SND_SOC_DAPM_INPUT("AIN2L"),
 218        SND_SOC_DAPM_INPUT("AIN2R"),
 219        SND_SOC_DAPM_INPUT("MICL"),
 220        SND_SOC_DAPM_INPUT("MICR"),
 221
 222        SND_SOC_DAPM_MIXER("Mic Preamp Left",
 223                CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
 224        SND_SOC_DAPM_MIXER("Mic Preamp Right",
 225                CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
 226
 227        /* HP */
 228        SND_SOC_DAPM_OUTPUT("HPL"),
 229        SND_SOC_DAPM_OUTPUT("HPR"),
 230
 231        /* mux */
 232        SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
 233                &cs42l51_dac_mux_controls),
 234        SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
 235                &cs42l51_adcl_mux_controls),
 236        SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
 237                &cs42l51_adcr_mux_controls),
 238};
 239
 240static const struct snd_soc_dapm_route cs42l51_routes[] = {
 241        {"HPL", NULL, "Left DAC"},
 242        {"HPR", NULL, "Right DAC"},
 243
 244        {"Left ADC", NULL, "Left PGA"},
 245        {"Right ADC", NULL, "Right PGA"},
 246
 247        {"Mic Preamp Left",  NULL,  "MICL"},
 248        {"Mic Preamp Right", NULL,  "MICR"},
 249
 250        {"PGA-ADC Mux Left",  "AIN1 Left",        "AIN1L" },
 251        {"PGA-ADC Mux Left",  "AIN2 Left",        "AIN2L" },
 252        {"PGA-ADC Mux Left",  "MIC Left",         "MICL"  },
 253        {"PGA-ADC Mux Left",  "MIC+preamp Left",  "Mic Preamp Left" },
 254        {"PGA-ADC Mux Right", "AIN1 Right",       "AIN1R" },
 255        {"PGA-ADC Mux Right", "AIN2 Right",       "AIN2R" },
 256        {"PGA-ADC Mux Right", "MIC Right",        "MICR" },
 257        {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
 258
 259        {"Left PGA", NULL, "PGA-ADC Mux Left"},
 260        {"Right PGA", NULL, "PGA-ADC Mux Right"},
 261};
 262
 263static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
 264                unsigned int format)
 265{
 266        struct snd_soc_codec *codec = codec_dai->codec;
 267        struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 268
 269        switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 270        case SND_SOC_DAIFMT_I2S:
 271        case SND_SOC_DAIFMT_LEFT_J:
 272        case SND_SOC_DAIFMT_RIGHT_J:
 273                cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
 274                break;
 275        default:
 276                dev_err(codec->dev, "invalid DAI format\n");
 277                return -EINVAL;
 278        }
 279
 280        switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 281        case SND_SOC_DAIFMT_CBM_CFM:
 282                cs42l51->func = MODE_MASTER;
 283                break;
 284        case SND_SOC_DAIFMT_CBS_CFS:
 285                cs42l51->func = MODE_SLAVE_AUTO;
 286                break;
 287        default:
 288                dev_err(codec->dev, "Unknown master/slave configuration\n");
 289                return -EINVAL;
 290        }
 291
 292        return 0;
 293}
 294
 295struct cs42l51_ratios {
 296        unsigned int ratio;
 297        unsigned char speed_mode;
 298        unsigned char mclk;
 299};
 300
 301static struct cs42l51_ratios slave_ratios[] = {
 302        {  512, CS42L51_QSM_MODE, 0 }, {  768, CS42L51_QSM_MODE, 0 },
 303        { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 304        { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
 305        {  256, CS42L51_HSM_MODE, 0 }, {  384, CS42L51_HSM_MODE, 0 },
 306        {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 307        { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
 308        {  128, CS42L51_SSM_MODE, 0 }, {  192, CS42L51_SSM_MODE, 0 },
 309        {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 310        {  512, CS42L51_SSM_MODE, 0 }, {  768, CS42L51_SSM_MODE, 0 },
 311        {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 312        {  256, CS42L51_DSM_MODE, 0 }, {  384, CS42L51_DSM_MODE, 0 },
 313};
 314
 315static struct cs42l51_ratios slave_auto_ratios[] = {
 316        { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 317        { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
 318        {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 319        { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
 320        {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 321        {  512, CS42L51_SSM_MODE, 1 }, {  768, CS42L51_SSM_MODE, 1 },
 322        {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 323        {  256, CS42L51_DSM_MODE, 1 }, {  384, CS42L51_DSM_MODE, 1 },
 324};
 325
 326static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 327                int clk_id, unsigned int freq, int dir)
 328{
 329        struct snd_soc_codec *codec = codec_dai->codec;
 330        struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 331
 332        cs42l51->mclk = freq;
 333        return 0;
 334}
 335
 336static int cs42l51_hw_params(struct snd_pcm_substream *substream,
 337                struct snd_pcm_hw_params *params,
 338                struct snd_soc_dai *dai)
 339{
 340        struct snd_soc_codec *codec = dai->codec;
 341        struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 342        int ret;
 343        unsigned int i;
 344        unsigned int rate;
 345        unsigned int ratio;
 346        struct cs42l51_ratios *ratios = NULL;
 347        int nr_ratios = 0;
 348        int intf_ctl, power_ctl, fmt;
 349
 350        switch (cs42l51->func) {
 351        case MODE_MASTER:
 352                return -EINVAL;
 353        case MODE_SLAVE:
 354                ratios = slave_ratios;
 355                nr_ratios = ARRAY_SIZE(slave_ratios);
 356                break;
 357        case MODE_SLAVE_AUTO:
 358                ratios = slave_auto_ratios;
 359                nr_ratios = ARRAY_SIZE(slave_auto_ratios);
 360                break;
 361        }
 362
 363        /* Figure out which MCLK/LRCK ratio to use */
 364        rate = params_rate(params);     /* Sampling rate, in Hz */
 365        ratio = cs42l51->mclk / rate;    /* MCLK/LRCK ratio */
 366        for (i = 0; i < nr_ratios; i++) {
 367                if (ratios[i].ratio == ratio)
 368                        break;
 369        }
 370
 371        if (i == nr_ratios) {
 372                /* We did not find a matching ratio */
 373                dev_err(codec->dev, "could not find matching ratio\n");
 374                return -EINVAL;
 375        }
 376
 377        intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
 378        power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
 379
 380        intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
 381                        | CS42L51_INTF_CTL_DAC_FORMAT(7));
 382        power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
 383                        | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
 384
 385        switch (cs42l51->func) {
 386        case MODE_MASTER:
 387                intf_ctl |= CS42L51_INTF_CTL_MASTER;
 388                power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 389                break;
 390        case MODE_SLAVE:
 391                power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 392                break;
 393        case MODE_SLAVE_AUTO:
 394                power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
 395                break;
 396        }
 397
 398        switch (cs42l51->audio_mode) {
 399        case SND_SOC_DAIFMT_I2S:
 400                intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
 401                intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
 402                break;
 403        case SND_SOC_DAIFMT_LEFT_J:
 404                intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
 405                break;
 406        case SND_SOC_DAIFMT_RIGHT_J:
 407                switch (params_width(params)) {
 408                case 16:
 409                        fmt = CS42L51_DAC_DIF_RJ16;
 410                        break;
 411                case 18:
 412                        fmt = CS42L51_DAC_DIF_RJ18;
 413                        break;
 414                case 20:
 415                        fmt = CS42L51_DAC_DIF_RJ20;
 416                        break;
 417                case 24:
 418                        fmt = CS42L51_DAC_DIF_RJ24;
 419                        break;
 420                default:
 421                        dev_err(codec->dev, "unknown format\n");
 422                        return -EINVAL;
 423                }
 424                intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
 425                break;
 426        default:
 427                dev_err(codec->dev, "unknown format\n");
 428                return -EINVAL;
 429        }
 430
 431        if (ratios[i].mclk)
 432                power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
 433
 434        ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
 435        if (ret < 0)
 436                return ret;
 437
 438        ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
 439        if (ret < 0)
 440                return ret;
 441
 442        return 0;
 443}
 444
 445static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
 446{
 447        struct snd_soc_codec *codec = dai->codec;
 448        int reg;
 449        int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
 450
 451        reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
 452
 453        if (mute)
 454                reg |= mask;
 455        else
 456                reg &= ~mask;
 457
 458        return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
 459}
 460
 461static const struct snd_soc_dai_ops cs42l51_dai_ops = {
 462        .hw_params      = cs42l51_hw_params,
 463        .set_sysclk     = cs42l51_set_dai_sysclk,
 464        .set_fmt        = cs42l51_set_dai_fmt,
 465        .digital_mute   = cs42l51_dai_mute,
 466};
 467
 468static struct snd_soc_dai_driver cs42l51_dai = {
 469        .name = "cs42l51-hifi",
 470        .playback = {
 471                .stream_name = "Playback",
 472                .channels_min = 1,
 473                .channels_max = 2,
 474                .rates = SNDRV_PCM_RATE_8000_96000,
 475                .formats = CS42L51_FORMATS,
 476        },
 477        .capture = {
 478                .stream_name = "Capture",
 479                .channels_min = 1,
 480                .channels_max = 2,
 481                .rates = SNDRV_PCM_RATE_8000_96000,
 482                .formats = CS42L51_FORMATS,
 483        },
 484        .ops = &cs42l51_dai_ops,
 485};
 486
 487static int cs42l51_codec_probe(struct snd_soc_codec *codec)
 488{
 489        int ret, reg;
 490
 491        /*
 492         * DAC configuration
 493         * - Use signal processor
 494         * - auto mute
 495         * - vol changes immediate
 496         * - no de-emphasize
 497         */
 498        reg = CS42L51_DAC_CTL_DATA_SEL(1)
 499                | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
 500        ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
 501        if (ret < 0)
 502                return ret;
 503
 504        return 0;
 505}
 506
 507static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
 508        .probe = cs42l51_codec_probe,
 509
 510        .controls = cs42l51_snd_controls,
 511        .num_controls = ARRAY_SIZE(cs42l51_snd_controls),
 512        .dapm_widgets = cs42l51_dapm_widgets,
 513        .num_dapm_widgets = ARRAY_SIZE(cs42l51_dapm_widgets),
 514        .dapm_routes = cs42l51_routes,
 515        .num_dapm_routes = ARRAY_SIZE(cs42l51_routes),
 516};
 517
 518const struct regmap_config cs42l51_regmap = {
 519        .max_register = CS42L51_CHARGE_FREQ,
 520        .cache_type = REGCACHE_RBTREE,
 521};
 522EXPORT_SYMBOL_GPL(cs42l51_regmap);
 523
 524int cs42l51_probe(struct device *dev, struct regmap *regmap)
 525{
 526        struct cs42l51_private *cs42l51;
 527        unsigned int val;
 528        int ret;
 529
 530        if (IS_ERR(regmap))
 531                return PTR_ERR(regmap);
 532
 533        cs42l51 = devm_kzalloc(dev, sizeof(struct cs42l51_private),
 534                               GFP_KERNEL);
 535        if (!cs42l51)
 536                return -ENOMEM;
 537
 538        dev_set_drvdata(dev, cs42l51);
 539
 540        /* Verify that we have a CS42L51 */
 541        ret = regmap_read(regmap, CS42L51_CHIP_REV_ID, &val);
 542        if (ret < 0) {
 543                dev_err(dev, "failed to read I2C\n");
 544                goto error;
 545        }
 546
 547        if ((val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
 548            (val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
 549                dev_err(dev, "Invalid chip id: %x\n", val);
 550                ret = -ENODEV;
 551                goto error;
 552        }
 553        dev_info(dev, "Cirrus Logic CS42L51, Revision: %02X\n",
 554                 val & CS42L51_CHIP_REV_MASK);
 555
 556        ret =  snd_soc_register_codec(dev,
 557                        &soc_codec_device_cs42l51, &cs42l51_dai, 1);
 558error:
 559        return ret;
 560}
 561EXPORT_SYMBOL_GPL(cs42l51_probe);
 562
 563const struct of_device_id cs42l51_of_match[] = {
 564        { .compatible = "cirrus,cs42l51", },
 565        { }
 566};
 567MODULE_DEVICE_TABLE(of, cs42l51_of_match);
 568EXPORT_SYMBOL_GPL(cs42l51_of_match);
 569
 570MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 571MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
 572MODULE_LICENSE("GPL");
 573
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