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        switch (event) {
 157        case SND_SOC_DAPM_PRE_PMD:
 158                snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
 159                                    CS42L51_POWER_CTL1_PDN,
 160                                    CS42L51_POWER_CTL1_PDN);
 161                break;
 162        default:
 163        case SND_SOC_DAPM_POST_PMD:
 164                snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
 165                                    CS42L51_POWER_CTL1_PDN, 0);
 166                break;
 167        }
 168
 169        return 0;
 170}
 171
 172static const char *cs42l51_dac_names[] = {"Direct PCM",
 173        "DSP PCM", "ADC"};
 174static SOC_ENUM_SINGLE_DECL(cs42l51_dac_mux_enum,
 175                            CS42L51_DAC_CTL, 6, cs42l51_dac_names);
 176static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
 177        SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
 178
 179static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
 180        "MIC Left", "MIC+preamp Left"};
 181static SOC_ENUM_SINGLE_DECL(cs42l51_adcl_mux_enum,
 182                            CS42L51_ADC_INPUT, 4, cs42l51_adcl_names);
 183static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
 184        SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
 185
 186static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
 187        "MIC Right", "MIC+preamp Right"};
 188static SOC_ENUM_SINGLE_DECL(cs42l51_adcr_mux_enum,
 189                            CS42L51_ADC_INPUT, 6, cs42l51_adcr_names);
 190static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
 191        SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
 192
 193static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
 194        SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
 195        SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
 196                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 197        SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
 198                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 199        SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
 200                CS42L51_POWER_CTL1, 1, 1,
 201                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 202        SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
 203                CS42L51_POWER_CTL1, 2, 1,
 204                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 205        SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
 206                CS42L51_POWER_CTL1, 5, 1,
 207                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 208        SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
 209                CS42L51_POWER_CTL1, 6, 1,
 210                cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 211
 212        /* analog/mic */
 213        SND_SOC_DAPM_INPUT("AIN1L"),
 214        SND_SOC_DAPM_INPUT("AIN1R"),
 215        SND_SOC_DAPM_INPUT("AIN2L"),
 216        SND_SOC_DAPM_INPUT("AIN2R"),
 217        SND_SOC_DAPM_INPUT("MICL"),
 218        SND_SOC_DAPM_INPUT("MICR"),
 219
 220        SND_SOC_DAPM_MIXER("Mic Preamp Left",
 221                CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
 222        SND_SOC_DAPM_MIXER("Mic Preamp Right",
 223                CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
 224
 225        /* HP */
 226        SND_SOC_DAPM_OUTPUT("HPL"),
 227        SND_SOC_DAPM_OUTPUT("HPR"),
 228
 229        /* mux */
 230        SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
 231                &cs42l51_dac_mux_controls),
 232        SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
 233                &cs42l51_adcl_mux_controls),
 234        SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
 235                &cs42l51_adcr_mux_controls),
 236};
 237
 238static const struct snd_soc_dapm_route cs42l51_routes[] = {
 239        {"HPL", NULL, "Left DAC"},
 240        {"HPR", NULL, "Right DAC"},
 241
 242        {"Left ADC", NULL, "Left PGA"},
 243        {"Right ADC", NULL, "Right PGA"},
 244
 245        {"Mic Preamp Left",  NULL,  "MICL"},
 246        {"Mic Preamp Right", NULL,  "MICR"},
 247
 248        {"PGA-ADC Mux Left",  "AIN1 Left",        "AIN1L" },
 249        {"PGA-ADC Mux Left",  "AIN2 Left",        "AIN2L" },
 250        {"PGA-ADC Mux Left",  "MIC Left",         "MICL"  },
 251        {"PGA-ADC Mux Left",  "MIC+preamp Left",  "Mic Preamp Left" },
 252        {"PGA-ADC Mux Right", "AIN1 Right",       "AIN1R" },
 253        {"PGA-ADC Mux Right", "AIN2 Right",       "AIN2R" },
 254        {"PGA-ADC Mux Right", "MIC Right",        "MICR" },
 255        {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
 256
 257        {"Left PGA", NULL, "PGA-ADC Mux Left"},
 258        {"Right PGA", NULL, "PGA-ADC Mux Right"},
 259};
 260
 261static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
 262                unsigned int format)
 263{
 264        struct snd_soc_codec *codec = codec_dai->codec;
 265        struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 266
 267        switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 268        case SND_SOC_DAIFMT_I2S:
 269        case SND_SOC_DAIFMT_LEFT_J:
 270        case SND_SOC_DAIFMT_RIGHT_J:
 271                cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
 272                break;
 273        default:
 274                dev_err(codec->dev, "invalid DAI format\n");
 275                return -EINVAL;
 276        }
 277
 278        switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 279        case SND_SOC_DAIFMT_CBM_CFM:
 280                cs42l51->func = MODE_MASTER;
 281                break;
 282        case SND_SOC_DAIFMT_CBS_CFS:
 283                cs42l51->func = MODE_SLAVE_AUTO;
 284                break;
 285        default:
 286                dev_err(codec->dev, "Unknown master/slave configuration\n");
 287                return -EINVAL;
 288        }
 289
 290        return 0;
 291}
 292
 293struct cs42l51_ratios {
 294        unsigned int ratio;
 295        unsigned char speed_mode;
 296        unsigned char mclk;
 297};
 298
 299static struct cs42l51_ratios slave_ratios[] = {
 300        {  512, CS42L51_QSM_MODE, 0 }, {  768, CS42L51_QSM_MODE, 0 },
 301        { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 302        { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
 303        {  256, CS42L51_HSM_MODE, 0 }, {  384, CS42L51_HSM_MODE, 0 },
 304        {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 305        { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
 306        {  128, CS42L51_SSM_MODE, 0 }, {  192, CS42L51_SSM_MODE, 0 },
 307        {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 308        {  512, CS42L51_SSM_MODE, 0 }, {  768, CS42L51_SSM_MODE, 0 },
 309        {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 310        {  256, CS42L51_DSM_MODE, 0 }, {  384, CS42L51_DSM_MODE, 0 },
 311};
 312
 313static struct cs42l51_ratios slave_auto_ratios[] = {
 314        { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 315        { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
 316        {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 317        { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
 318        {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 319        {  512, CS42L51_SSM_MODE, 1 }, {  768, CS42L51_SSM_MODE, 1 },
 320        {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 321        {  256, CS42L51_DSM_MODE, 1 }, {  384, CS42L51_DSM_MODE, 1 },
 322};
 323
 324static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 325                int clk_id, unsigned int freq, int dir)
 326{
 327        struct snd_soc_codec *codec = codec_dai->codec;
 328        struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 329
 330        cs42l51->mclk = freq;
 331        return 0;
 332}
 333
 334static int cs42l51_hw_params(struct snd_pcm_substream *substream,
 335                struct snd_pcm_hw_params *params,
 336                struct snd_soc_dai *dai)
 337{
 338        struct snd_soc_codec *codec = dai->codec;
 339        struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 340        int ret;
 341        unsigned int i;
 342        unsigned int rate;
 343        unsigned int ratio;
 344        struct cs42l51_ratios *ratios = NULL;
 345        int nr_ratios = 0;
 346        int intf_ctl, power_ctl, fmt;
 347
 348        switch (cs42l51->func) {
 349        case MODE_MASTER:
 350                return -EINVAL;
 351        case MODE_SLAVE:
 352                ratios = slave_ratios;
 353                nr_ratios = ARRAY_SIZE(slave_ratios);
 354                break;
 355        case MODE_SLAVE_AUTO:
 356                ratios = slave_auto_ratios;
 357                nr_ratios = ARRAY_SIZE(slave_auto_ratios);
 358                break;
 359        }
 360
 361        /* Figure out which MCLK/LRCK ratio to use */
 362        rate = params_rate(params);     /* Sampling rate, in Hz */
 363        ratio = cs42l51->mclk / rate;    /* MCLK/LRCK ratio */
 364        for (i = 0; i < nr_ratios; i++) {
 365                if (ratios[i].ratio == ratio)
 366                        break;
 367        }
 368
 369        if (i == nr_ratios) {
 370                /* We did not find a matching ratio */
 371                dev_err(codec->dev, "could not find matching ratio\n");
 372                return -EINVAL;
 373        }
 374
 375        intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
 376        power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
 377
 378        intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
 379                        | CS42L51_INTF_CTL_DAC_FORMAT(7));
 380        power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
 381                        | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
 382
 383        switch (cs42l51->func) {
 384        case MODE_MASTER:
 385                intf_ctl |= CS42L51_INTF_CTL_MASTER;
 386                power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 387                break;
 388        case MODE_SLAVE:
 389                power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 390                break;
 391        case MODE_SLAVE_AUTO:
 392                power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
 393                break;
 394        }
 395
 396        switch (cs42l51->audio_mode) {
 397        case SND_SOC_DAIFMT_I2S:
 398                intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
 399                intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
 400                break;
 401        case SND_SOC_DAIFMT_LEFT_J:
 402                intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
 403                break;
 404        case SND_SOC_DAIFMT_RIGHT_J:
 405                switch (params_width(params)) {
 406                case 16:
 407                        fmt = CS42L51_DAC_DIF_RJ16;
 408                        break;
 409                case 18:
 410                        fmt = CS42L51_DAC_DIF_RJ18;
 411                        break;
 412                case 20:
 413                        fmt = CS42L51_DAC_DIF_RJ20;
 414                        break;
 415                case 24:
 416                        fmt = CS42L51_DAC_DIF_RJ24;
 417                        break;
 418                default:
 419                        dev_err(codec->dev, "unknown format\n");
 420                        return -EINVAL;
 421                }
 422                intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
 423                break;
 424        default:
 425                dev_err(codec->dev, "unknown format\n");
 426                return -EINVAL;
 427        }
 428
 429        if (ratios[i].mclk)
 430                power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
 431
 432        ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
 433        if (ret < 0)
 434                return ret;
 435
 436        ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
 437        if (ret < 0)
 438                return ret;
 439
 440        return 0;
 441}
 442
 443static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
 444{
 445        struct snd_soc_codec *codec = dai->codec;
 446        int reg;
 447        int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
 448
 449        reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
 450
 451        if (mute)
 452                reg |= mask;
 453        else
 454                reg &= ~mask;
 455
 456        return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
 457}
 458
 459static const struct snd_soc_dai_ops cs42l51_dai_ops = {
 460        .hw_params      = cs42l51_hw_params,
 461        .set_sysclk     = cs42l51_set_dai_sysclk,
 462        .set_fmt        = cs42l51_set_dai_fmt,
 463        .digital_mute   = cs42l51_dai_mute,
 464};
 465
 466static struct snd_soc_dai_driver cs42l51_dai = {
 467        .name = "cs42l51-hifi",
 468        .playback = {
 469                .stream_name = "Playback",
 470                .channels_min = 1,
 471                .channels_max = 2,
 472                .rates = SNDRV_PCM_RATE_8000_96000,
 473                .formats = CS42L51_FORMATS,
 474        },
 475        .capture = {
 476                .stream_name = "Capture",
 477                .channels_min = 1,
 478                .channels_max = 2,
 479                .rates = SNDRV_PCM_RATE_8000_96000,
 480                .formats = CS42L51_FORMATS,
 481        },
 482        .ops = &cs42l51_dai_ops,
 483};
 484
 485static int cs42l51_codec_probe(struct snd_soc_codec *codec)
 486{
 487        int ret, reg;
 488
 489        /*
 490         * DAC configuration
 491         * - Use signal processor
 492         * - auto mute
 493         * - vol changes immediate
 494         * - no de-emphasize
 495         */
 496        reg = CS42L51_DAC_CTL_DATA_SEL(1)
 497                | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
 498        ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
 499        if (ret < 0)
 500                return ret;
 501
 502        return 0;
 503}
 504
 505static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
 506        .probe = cs42l51_codec_probe,
 507
 508        .controls = cs42l51_snd_controls,
 509        .num_controls = ARRAY_SIZE(cs42l51_snd_controls),
 510        .dapm_widgets = cs42l51_dapm_widgets,
 511        .num_dapm_widgets = ARRAY_SIZE(cs42l51_dapm_widgets),
 512        .dapm_routes = cs42l51_routes,
 513        .num_dapm_routes = ARRAY_SIZE(cs42l51_routes),
 514};
 515
 516const struct regmap_config cs42l51_regmap = {
 517        .max_register = CS42L51_CHARGE_FREQ,
 518        .cache_type = REGCACHE_RBTREE,
 519};
 520EXPORT_SYMBOL_GPL(cs42l51_regmap);
 521
 522int cs42l51_probe(struct device *dev, struct regmap *regmap)
 523{
 524        struct cs42l51_private *cs42l51;
 525        unsigned int val;
 526        int ret;
 527
 528        if (IS_ERR(regmap))
 529                return PTR_ERR(regmap);
 530
 531        cs42l51 = devm_kzalloc(dev, sizeof(struct cs42l51_private),
 532                               GFP_KERNEL);
 533        if (!cs42l51)
 534                return -ENOMEM;
 535
 536        dev_set_drvdata(dev, cs42l51);
 537
 538        /* Verify that we have a CS42L51 */
 539        ret = regmap_read(regmap, CS42L51_CHIP_REV_ID, &val);
 540        if (ret < 0) {
 541                dev_err(dev, "failed to read I2C\n");
 542                goto error;
 543        }
 544
 545        if ((val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
 546            (val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
 547                dev_err(dev, "Invalid chip id: %x\n", val);
 548                ret = -ENODEV;
 549                goto error;
 550        }
 551        dev_info(dev, "Cirrus Logic CS42L51, Revision: %02X\n",
 552                 val & CS42L51_CHIP_REV_MASK);
 553
 554        ret =  snd_soc_register_codec(dev,
 555                        &soc_codec_device_cs42l51, &cs42l51_dai, 1);
 556error:
 557        return ret;
 558}
 559EXPORT_SYMBOL_GPL(cs42l51_probe);
 560
 561static const struct of_device_id cs42l51_of_match[] = {
 562        { .compatible = "cirrus,cs42l51", },
 563        { }
 564};
 565MODULE_DEVICE_TABLE(of, cs42l51_of_match);
 566MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 567MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
 568MODULE_LICENSE("GPL");
 569
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