sound/soc/codecs/cs42l51.c

   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/platform_device.h>
  26 #include <linux/slab.h>
  27 #include <sound/core.h>
  28 #include <sound/soc.h>
  29 #include <sound/soc-dapm.h>
  30 #include <sound/tlv.h>
  31 #include <sound/initval.h>
  32 #include <sound/pcm_params.h>
  33 #include <sound/pcm.h>
  34 #include <linux/i2c.h>
  35
  36 #include "cs42l51.h"
  37
  38 enum master_slave_mode {
  39         MODE_SLAVE,
  40         MODE_SLAVE_AUTO,
  41         MODE_MASTER,
  42 };
  43
  44 struct cs42l51_private {
  45         enum snd_soc_control_type control_type;
  46         void *control_data;
  47         unsigned int mclk;
  48         unsigned int audio_mode;        /* The mode (I2S or left-justified) */
  49         enum master_slave_mode func;
  50         u8 reg_cache[CS42L51_NUMREGS];
  51 };
  52
  53 #define CS42L51_FORMATS ( \
  54                 SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
  55                 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
  56                 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
  57                 SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE)
  58
  59 static int cs42l51_fill_cache(struct snd_soc_codec *codec)
  60 {
  61         u8 *cache = codec->reg_cache + 1;
  62         struct i2c_client *i2c_client = codec->control_data;
  63         s32 length;
  64
  65         length = i2c_smbus_read_i2c_block_data(i2c_client,
  66                         CS42L51_FIRSTREG | 0x80, CS42L51_NUMREGS, cache);
  67         if (length != CS42L51_NUMREGS) {
  68                 dev_err(&i2c_client->dev,
  69                                 "I2C read failure, addr=0x%x (ret=%d vs %d)\n",
  70                                 i2c_client->addr, length, CS42L51_NUMREGS);
  71                 return -EIO;
  72         }
  73
  74         return 0;
  75 }
  76
  77 static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
  78                         struct snd_ctl_elem_value *ucontrol)
  79 {
  80         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  81         unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
  82
  83         switch (value) {
  84         default:
  85         case 0:
  86                 ucontrol->value.integer.value[0] = 0;
  87                 break;
  88         /* same value : (L+R)/2 and (R+L)/2 */
  89         case 1:
  90         case 2:
  91                 ucontrol->value.integer.value[0] = 1;
  92                 break;
  93         case 3:
  94                 ucontrol->value.integer.value[0] = 2;
  95                 break;
  96         }
  97
  98         return 0;
  99 }
 100
 101 #define CHAN_MIX_NORMAL 0x00
 102 #define CHAN_MIX_BOTH   0x55
 103 #define CHAN_MIX_SWAP   0xFF
 104
 105 static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
 106                         struct snd_ctl_elem_value *ucontrol)
 107 {
 108         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 109         unsigned char val;
 110
 111         switch (ucontrol->value.integer.value[0]) {
 112         default:
 113         case 0:
 114                 val = CHAN_MIX_NORMAL;
 115                 break;
 116         case 1:
 117                 val = CHAN_MIX_BOTH;
 118                 break;
 119         case 2:
 120                 val = CHAN_MIX_SWAP;
 121                 break;
 122         }
 123
 124         snd_soc_write(codec, CS42L51_PCM_MIXER, val);
 125
 126         return 1;
 127 }
 128
 129 static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
 130 static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
 131 /* This is a lie. after -102 db, it stays at -102 */
 132 /* maybe a range would be better */
 133 static const DECLARE_TLV_DB_SCALE(aout_tlv, -11550, 50, 0);
 134
 135 static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
 136 static const char *chan_mix[] = {
 137         "L R",
 138         "L+R",
 139         "R L",
 140 };
 141
 142 static const struct soc_enum cs42l51_chan_mix =
 143         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);
 144
 145 static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
 146         SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
 147                         CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
 148                         7, 0xffffff99, 0x18, adc_pcm_tlv),
 149         SOC_DOUBLE_R("PCM Playback Switch",
 150                         CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
 151         SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
 152                         CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
 153                         8, 0xffffff19, 0x18, aout_tlv),
 154         SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
 155                         CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
 156                         7, 0xffffff99, 0x18, adc_pcm_tlv),
 157         SOC_DOUBLE_R("ADC Mixer Switch",
 158                         CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
 159         SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
 160         SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
 161         SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
 162         SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
 163         SOC_DOUBLE_TLV("Mic Boost Volume",
 164                         CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
 165         SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
 166         SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
 167         SOC_ENUM_EXT("PCM channel mixer",
 168                         cs42l51_chan_mix,
 169                         cs42l51_get_chan_mix, cs42l51_set_chan_mix),
 170 };
 171
 172 /*
 173  * to power down, one must:
 174  * 1.) Enable the PDN bit
 175  * 2.) enable power-down for the select channels
 176  * 3.) disable the PDN bit.
 177  */
 178 static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
 179                 struct snd_kcontrol *kcontrol, int event)
 180 {
 181         unsigned long value;
 182
 183         value = snd_soc_read(w->codec, CS42L51_POWER_CTL1);
 184         value &= ~CS42L51_POWER_CTL1_PDN;
 185
 186         switch (event) {
 187         case SND_SOC_DAPM_PRE_PMD:
 188                 value |= CS42L51_POWER_CTL1_PDN;
 189                 break;
 190         default:
 191         case SND_SOC_DAPM_POST_PMD:
 192                 break;
 193         }
 194         snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
 195                 CS42L51_POWER_CTL1_PDN, value);
 196
 197         return 0;
 198 }
 199
 200 static const char *cs42l51_dac_names[] = {"Direct PCM",
 201         "DSP PCM", "ADC"};
 202 static const struct soc_enum cs42l51_dac_mux_enum =
 203         SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
 204 static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
 205         SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
 206
 207 static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
 208         "MIC Left", "MIC+preamp Left"};
 209 static const struct soc_enum cs42l51_adcl_mux_enum =
 210         SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
 211 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
 212         SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
 213
 214 static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
 215         "MIC Right", "MIC+preamp Right"};
 216 static const struct soc_enum cs42l51_adcr_mux_enum =
 217         SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
 218 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
 219         SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
 220
 221 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
 222         SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
 223         SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
 224                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 225         SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
 226                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 227         SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
 228                 CS42L51_POWER_CTL1, 1, 1,
 229                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 230         SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
 231                 CS42L51_POWER_CTL1, 2, 1,
 232                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 233         SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
 234                 CS42L51_POWER_CTL1, 5, 1,
 235                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 236         SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
 237                 CS42L51_POWER_CTL1, 6, 1,
 238                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 239
 240         /* analog/mic */
 241         SND_SOC_DAPM_INPUT("AIN1L"),
 242         SND_SOC_DAPM_INPUT("AIN1R"),
 243         SND_SOC_DAPM_INPUT("AIN2L"),
 244         SND_SOC_DAPM_INPUT("AIN2R"),
 245         SND_SOC_DAPM_INPUT("MICL"),
 246         SND_SOC_DAPM_INPUT("MICR"),
 247
 248         SND_SOC_DAPM_MIXER("Mic Preamp Left",
 249                 CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
 250         SND_SOC_DAPM_MIXER("Mic Preamp Right",
 251                 CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
 252
 253         /* HP */
 254         SND_SOC_DAPM_OUTPUT("HPL"),
 255         SND_SOC_DAPM_OUTPUT("HPR"),
 256
 257         /* mux */
 258         SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
 259                 &cs42l51_dac_mux_controls),
 260         SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
 261                 &cs42l51_adcl_mux_controls),
 262         SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
 263                 &cs42l51_adcr_mux_controls),
 264 };
 265
 266 static const struct snd_soc_dapm_route cs42l51_routes[] = {
 267         {"HPL", NULL, "Left DAC"},
 268         {"HPR", NULL, "Right DAC"},
 269
 270         {"Left ADC", NULL, "Left PGA"},
 271         {"Right ADC", NULL, "Right PGA"},
 272
 273         {"Mic Preamp Left",  NULL,  "MICL"},
 274         {"Mic Preamp Right", NULL,  "MICR"},
 275
 276         {"PGA-ADC Mux Left",  "AIN1 Left",        "AIN1L" },
 277         {"PGA-ADC Mux Left",  "AIN2 Left",        "AIN2L" },
 278         {"PGA-ADC Mux Left",  "MIC Left",         "MICL"  },
 279         {"PGA-ADC Mux Left",  "MIC+preamp Left",  "Mic Preamp Left" },
 280         {"PGA-ADC Mux Right", "AIN1 Right",       "AIN1R" },
 281         {"PGA-ADC Mux Right", "AIN2 Right",       "AIN2R" },
 282         {"PGA-ADC Mux Right", "MIC Right",        "MICR" },
 283         {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
 284
 285         {"Left PGA", NULL, "PGA-ADC Mux Left"},
 286         {"Right PGA", NULL, "PGA-ADC Mux Right"},
 287 };
 288
 289 static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
 290                 unsigned int format)
 291 {
 292         struct snd_soc_codec *codec = codec_dai->codec;
 293         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 294         int ret = 0;
 295
 296         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 297         case SND_SOC_DAIFMT_I2S:
 298         case SND_SOC_DAIFMT_LEFT_J:
 299         case SND_SOC_DAIFMT_RIGHT_J:
 300                 cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
 301                 break;
 302         default:
 303                 dev_err(codec->dev, "invalid DAI format\n");
 304                 ret = -EINVAL;
 305         }
 306
 307         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 308         case SND_SOC_DAIFMT_CBM_CFM:
 309                 cs42l51->func = MODE_MASTER;
 310                 break;
 311         case SND_SOC_DAIFMT_CBS_CFS:
 312                 cs42l51->func = MODE_SLAVE_AUTO;
 313                 break;
 314         default:
 315                 ret = -EINVAL;
 316                 break;
 317         }
 318
 319         return ret;
 320 }
 321
 322 struct cs42l51_ratios {
 323         unsigned int ratio;
 324         unsigned char speed_mode;
 325         unsigned char mclk;
 326 };
 327
 328 static struct cs42l51_ratios slave_ratios[] = {
 329         {  512, CS42L51_QSM_MODE, 0 }, {  768, CS42L51_QSM_MODE, 0 },
 330         { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 331         { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
 332         {  256, CS42L51_HSM_MODE, 0 }, {  384, CS42L51_HSM_MODE, 0 },
 333         {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 334         { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
 335         {  128, CS42L51_SSM_MODE, 0 }, {  192, CS42L51_SSM_MODE, 0 },
 336         {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 337         {  512, CS42L51_SSM_MODE, 0 }, {  768, CS42L51_SSM_MODE, 0 },
 338         {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 339         {  256, CS42L51_DSM_MODE, 0 }, {  384, CS42L51_DSM_MODE, 0 },
 340 };
 341
 342 static struct cs42l51_ratios slave_auto_ratios[] = {
 343         { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 344         { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
 345         {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 346         { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
 347         {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 348         {  512, CS42L51_SSM_MODE, 1 }, {  768, CS42L51_SSM_MODE, 1 },
 349         {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 350         {  256, CS42L51_DSM_MODE, 1 }, {  384, CS42L51_DSM_MODE, 1 },
 351 };
 352
 353 static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 354                 int clk_id, unsigned int freq, int dir)
 355 {
 356         struct snd_soc_codec *codec = codec_dai->codec;
 357         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 358
 359         cs42l51->mclk = freq;
 360         return 0;
 361 }
 362
 363 static int cs42l51_hw_params(struct snd_pcm_substream *substream,
 364                 struct snd_pcm_hw_params *params,
 365                 struct snd_soc_dai *dai)
 366 {
 367         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 368         struct snd_soc_codec *codec = rtd->codec;
 369         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 370         int ret;
 371         unsigned int i;
 372         unsigned int rate;
 373         unsigned int ratio;
 374         struct cs42l51_ratios *ratios = NULL;
 375         int nr_ratios = 0;
 376         int intf_ctl, power_ctl, fmt;
 377
 378         switch (cs42l51->func) {
 379         case MODE_MASTER:
 380                 return -EINVAL;
 381         case MODE_SLAVE:
 382                 ratios = slave_ratios;
 383                 nr_ratios = ARRAY_SIZE(slave_ratios);
 384                 break;
 385         case MODE_SLAVE_AUTO:
 386                 ratios = slave_auto_ratios;
 387                 nr_ratios = ARRAY_SIZE(slave_auto_ratios);
 388                 break;
 389         }
 390
 391         /* Figure out which MCLK/LRCK ratio to use */
 392         rate = params_rate(params);     /* Sampling rate, in Hz */
 393         ratio = cs42l51->mclk / rate;    /* MCLK/LRCK ratio */
 394         for (i = 0; i < nr_ratios; i++) {
 395                 if (ratios[i].ratio == ratio)
 396                         break;
 397         }
 398
 399         if (i == nr_ratios) {
 400                 /* We did not find a matching ratio */
 401                 dev_err(codec->dev, "could not find matching ratio\n");
 402                 return -EINVAL;
 403         }
 404
 405         intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
 406         power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
 407
 408         intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
 409                         | CS42L51_INTF_CTL_DAC_FORMAT(7));
 410         power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
 411                         | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
 412
 413         switch (cs42l51->func) {
 414         case MODE_MASTER:
 415                 intf_ctl |= CS42L51_INTF_CTL_MASTER;
 416                 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 417                 break;
 418         case MODE_SLAVE:
 419                 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 420                 break;
 421         case MODE_SLAVE_AUTO:
 422                 power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
 423                 break;
 424         }
 425
 426         switch (cs42l51->audio_mode) {
 427         case SND_SOC_DAIFMT_I2S:
 428                 intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
 429                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
 430                 break;
 431         case SND_SOC_DAIFMT_LEFT_J:
 432                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
 433                 break;
 434         case SND_SOC_DAIFMT_RIGHT_J:
 435                 switch (params_format(params)) {
 436                 case SNDRV_PCM_FORMAT_S16_LE:
 437                 case SNDRV_PCM_FORMAT_S16_BE:
 438                         fmt = CS42L51_DAC_DIF_RJ16;
 439                         break;
 440                 case SNDRV_PCM_FORMAT_S18_3LE:
 441                 case SNDRV_PCM_FORMAT_S18_3BE:
 442                         fmt = CS42L51_DAC_DIF_RJ18;
 443                         break;
 444                 case SNDRV_PCM_FORMAT_S20_3LE:
 445                 case SNDRV_PCM_FORMAT_S20_3BE:
 446                         fmt = CS42L51_DAC_DIF_RJ20;
 447                         break;
 448                 case SNDRV_PCM_FORMAT_S24_LE:
 449                 case SNDRV_PCM_FORMAT_S24_BE:
 450                         fmt = CS42L51_DAC_DIF_RJ24;
 451                         break;
 452                 default:
 453                         dev_err(codec->dev, "unknown format\n");
 454                         return -EINVAL;
 455                 }
 456                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
 457                 break;
 458         default:
 459                 dev_err(codec->dev, "unknown format\n");
 460                 return -EINVAL;
 461         }
 462
 463         if (ratios[i].mclk)
 464                 power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
 465
 466         ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
 467         if (ret < 0)
 468                 return ret;
 469
 470         ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
 471         if (ret < 0)
 472                 return ret;
 473
 474         return 0;
 475 }
 476
 477 static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
 478 {
 479         struct snd_soc_codec *codec = dai->codec;
 480         int reg;
 481         int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
 482
 483         reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
 484
 485         if (mute)
 486                 reg |= mask;
 487         else
 488                 reg &= ~mask;
 489
 490         return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
 491 }
 492
 493 static struct snd_soc_dai_ops cs42l51_dai_ops = {
 494         .hw_params      = cs42l51_hw_params,
 495         .set_sysclk     = cs42l51_set_dai_sysclk,
 496         .set_fmt        = cs42l51_set_dai_fmt,
 497         .digital_mute   = cs42l51_dai_mute,
 498 };
 499
 500 static struct snd_soc_dai_driver cs42l51_dai = {
 501         .name = "cs42l51-hifi",
 502         .playback = {
 503                 .stream_name = "Playback",
 504                 .channels_min = 1,
 505                 .channels_max = 2,
 506                 .rates = SNDRV_PCM_RATE_8000_96000,
 507                 .formats = CS42L51_FORMATS,
 508         },
 509         .capture = {
 510                 .stream_name = "Capture",
 511                 .channels_min = 1,
 512                 .channels_max = 2,
 513                 .rates = SNDRV_PCM_RATE_8000_96000,
 514                 .formats = CS42L51_FORMATS,
 515         },
 516         .ops = &cs42l51_dai_ops,
 517 };
 518
 519 static int cs42l51_probe(struct snd_soc_codec *codec)
 520 {
 521         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 522         struct snd_soc_dapm_context *dapm = &codec->dapm;
 523         int ret, reg;
 524
 525         codec->control_data = cs42l51->control_data;
 526
 527         ret = cs42l51_fill_cache(codec);
 528         if (ret < 0) {
 529                 dev_err(codec->dev, "failed to fill register cache\n");
 530                 return ret;
 531         }
 532
 533         ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
 534         if (ret < 0) {
 535                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 536                 return ret;
 537         }
 538
 539         /*
 540          * DAC configuration
 541          * - Use signal processor
 542          * - auto mute
 543          * - vol changes immediate
 544          * - no de-emphasize
 545          */
 546         reg = CS42L51_DAC_CTL_DATA_SEL(1)
 547                 | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
 548         ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
 549         if (ret < 0)
 550                 return ret;
 551
 552         snd_soc_add_controls(codec, cs42l51_snd_controls,
 553                 ARRAY_SIZE(cs42l51_snd_controls));
 554         snd_soc_dapm_new_controls(dapm, cs42l51_dapm_widgets,
 555                 ARRAY_SIZE(cs42l51_dapm_widgets));
 556         snd_soc_dapm_add_routes(dapm, cs42l51_routes,
 557                 ARRAY_SIZE(cs42l51_routes));
 558
 559         return 0;
 560 }
 561
 562 static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
 563         .probe =        cs42l51_probe,
 564         .reg_cache_size = CS42L51_NUMREGS,
 565         .reg_word_size = sizeof(u8),
 566 };
 567
 568 static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
 569         const struct i2c_device_id *id)
 570 {
 571         struct cs42l51_private *cs42l51;
 572         int ret;
 573
 574         /* Verify that we have a CS42L51 */
 575         ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
 576         if (ret < 0) {
 577                 dev_err(&i2c_client->dev, "failed to read I2C\n");
 578                 goto error;
 579         }
 580
 581         if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
 582             (ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
 583                 dev_err(&i2c_client->dev, "Invalid chip id\n");
 584                 ret = -ENODEV;
 585                 goto error;
 586         }
 587
 588         dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
 589                                 ret & 7);
 590
 591         cs42l51 = kzalloc(sizeof(struct cs42l51_private), GFP_KERNEL);
 592         if (!cs42l51) {
 593                 dev_err(&i2c_client->dev, "could not allocate codec\n");
 594                 return -ENOMEM;
 595         }
 596
 597         i2c_set_clientdata(i2c_client, cs42l51);
 598         cs42l51->control_data = i2c_client;
 599         cs42l51->control_type = SND_SOC_I2C;
 600
 601         ret =  snd_soc_register_codec(&i2c_client->dev,
 602                         &soc_codec_device_cs42l51, &cs42l51_dai, 1);
 603         if (ret < 0)
 604                 kfree(cs42l51);
 605 error:
 606         return ret;
 607 }
 608
 609 static int cs42l51_i2c_remove(struct i2c_client *client)
 610 {
 611         struct cs42l51_private *cs42l51 = i2c_get_clientdata(client);
 612
 613         snd_soc_unregister_codec(&client->dev);
 614         kfree(cs42l51);
 615         return 0;
 616 }
 617
 618 static const struct i2c_device_id cs42l51_id[] = {
 619         {"cs42l51", 0},
 620         {}
 621 };
 622 MODULE_DEVICE_TABLE(i2c, cs42l51_id);
 623
 624 static struct i2c_driver cs42l51_i2c_driver = {
 625         .driver = {
 626                 .name = "cs42l51-codec",
 627                 .owner = THIS_MODULE,
 628         },
 629         .id_table = cs42l51_id,
 630         .probe = cs42l51_i2c_probe,
 631         .remove = cs42l51_i2c_remove,
 632 };
 633
 634 static int __init cs42l51_init(void)
 635 {
 636         int ret;
 637
 638         ret = i2c_add_driver(&cs42l51_i2c_driver);
 639         if (ret != 0) {
 640                 printk(KERN_ERR "%s: can't add i2c driver\n", __func__);
 641                 return ret;
 642         }
 643         return 0;
 644 }
 645 module_init(cs42l51_init);
 646
 647 static void __exit cs42l51_exit(void)
 648 {
 649         i2c_del_driver(&cs42l51_i2c_driver);
 650 }
 651 module_exit(cs42l51_exit);
 652
 653 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 654 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
 655 MODULE_LICENSE("GPL");