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/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/i2c.h>
  33
  34 #include "cs42l51.h"
  35
  36 enum master_slave_mode {
  37         MODE_SLAVE,
  38         MODE_SLAVE_AUTO,
  39         MODE_MASTER,
  40 };
  41
  42 struct cs42l51_private {
  43         enum snd_soc_control_type control_type;
  44         unsigned int mclk;
  45         unsigned int audio_mode;        /* The mode (I2S or left-justified) */
  46         enum master_slave_mode func;
  47 };
  48
  49 #define CS42L51_FORMATS ( \
  50                 SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
  51                 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
  52                 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
  53                 SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE)
  54
  55 static int cs42l51_fill_cache(struct snd_soc_codec *codec)
  56 {
  57         u8 *cache = codec->reg_cache + 1;
  58         struct i2c_client *i2c_client = to_i2c_client(codec->dev);
  59         s32 length;
  60
  61         length = i2c_smbus_read_i2c_block_data(i2c_client,
  62                         CS42L51_FIRSTREG | 0x80, CS42L51_NUMREGS, cache);
  63         if (length != CS42L51_NUMREGS) {
  64                 dev_err(&i2c_client->dev,
  65                                 "I2C read failure, addr=0x%x (ret=%d vs %d)\n",
  66                                 i2c_client->addr, length, CS42L51_NUMREGS);
  67                 return -EIO;
  68         }
  69
  70         return 0;
  71 }
  72
  73 static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
  74                         struct snd_ctl_elem_value *ucontrol)
  75 {
  76         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  77         unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
  78
  79         switch (value) {
  80         default:
  81         case 0:
  82                 ucontrol->value.integer.value[0] = 0;
  83                 break;
  84         /* same value : (L+R)/2 and (R+L)/2 */
  85         case 1:
  86         case 2:
  87                 ucontrol->value.integer.value[0] = 1;
  88                 break;
  89         case 3:
  90                 ucontrol->value.integer.value[0] = 2;
  91                 break;
  92         }
  93
  94         return 0;
  95 }
  96
  97 #define CHAN_MIX_NORMAL 0x00
  98 #define CHAN_MIX_BOTH   0x55
  99 #define CHAN_MIX_SWAP   0xFF
 100
 101 static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
 102                         struct snd_ctl_elem_value *ucontrol)
 103 {
 104         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 105         unsigned char val;
 106
 107         switch (ucontrol->value.integer.value[0]) {
 108         default:
 109         case 0:
 110                 val = CHAN_MIX_NORMAL;
 111                 break;
 112         case 1:
 113                 val = CHAN_MIX_BOTH;
 114                 break;
 115         case 2:
 116                 val = CHAN_MIX_SWAP;
 117                 break;
 118         }
 119
 120         snd_soc_write(codec, CS42L51_PCM_MIXER, val);
 121
 122         return 1;
 123 }
 124
 125 static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
 126 static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
 127
 128 static const DECLARE_TLV_DB_SCALE(aout_tlv, -10200, 50, 0);
 129
 130 static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
 131 static const char *chan_mix[] = {
 132         "L R",
 133         "L+R",
 134         "R L",
 135 };
 136
 137 static const struct soc_enum cs42l51_chan_mix =
 138         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);
 139
 140 static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
 141         SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
 142                         CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
 143                         0, 0x19, 0x7F, adc_pcm_tlv),
 144         SOC_DOUBLE_R("PCM Playback Switch",
 145                         CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
 146         SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
 147                         CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
 148                         0, 0x34, 0xE4, aout_tlv),
 149         SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
 150                         CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
 151                         0, 0x19, 0x7F, adc_pcm_tlv),
 152         SOC_DOUBLE_R("ADC Mixer Switch",
 153                         CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
 154         SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
 155         SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
 156         SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
 157         SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
 158         SOC_DOUBLE_TLV("Mic Boost Volume",
 159                         CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
 160         SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
 161         SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
 162         SOC_ENUM_EXT("PCM channel mixer",
 163                         cs42l51_chan_mix,
 164                         cs42l51_get_chan_mix, cs42l51_set_chan_mix),
 165 };
 166
 167 /*
 168  * to power down, one must:
 169  * 1.) Enable the PDN bit
 170  * 2.) enable power-down for the select channels
 171  * 3.) disable the PDN bit.
 172  */
 173 static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
 174                 struct snd_kcontrol *kcontrol, int event)
 175 {
 176         switch (event) {
 177         case SND_SOC_DAPM_PRE_PMD:
 178                 snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
 179                                     CS42L51_POWER_CTL1_PDN,
 180                                     CS42L51_POWER_CTL1_PDN);
 181                 break;
 182         default:
 183         case SND_SOC_DAPM_POST_PMD:
 184                 snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
 185                                     CS42L51_POWER_CTL1_PDN, 0);
 186                 break;
 187         }
 188
 189         return 0;
 190 }
 191
 192 static const char *cs42l51_dac_names[] = {"Direct PCM",
 193         "DSP PCM", "ADC"};
 194 static const struct soc_enum cs42l51_dac_mux_enum =
 195         SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
 196 static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
 197         SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
 198
 199 static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
 200         "MIC Left", "MIC+preamp Left"};
 201 static const struct soc_enum cs42l51_adcl_mux_enum =
 202         SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
 203 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
 204         SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
 205
 206 static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
 207         "MIC Right", "MIC+preamp Right"};
 208 static const struct soc_enum cs42l51_adcr_mux_enum =
 209         SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
 210 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
 211         SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
 212
 213 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
 214         SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
 215         SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
 216                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 217         SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
 218                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 219         SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
 220                 CS42L51_POWER_CTL1, 1, 1,
 221                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 222         SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
 223                 CS42L51_POWER_CTL1, 2, 1,
 224                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 225         SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
 226                 CS42L51_POWER_CTL1, 5, 1,
 227                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 228         SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
 229                 CS42L51_POWER_CTL1, 6, 1,
 230                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 231
 232         /* analog/mic */
 233         SND_SOC_DAPM_INPUT("AIN1L"),
 234         SND_SOC_DAPM_INPUT("AIN1R"),
 235         SND_SOC_DAPM_INPUT("AIN2L"),
 236         SND_SOC_DAPM_INPUT("AIN2R"),
 237         SND_SOC_DAPM_INPUT("MICL"),
 238         SND_SOC_DAPM_INPUT("MICR"),
 239
 240         SND_SOC_DAPM_MIXER("Mic Preamp Left",
 241                 CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
 242         SND_SOC_DAPM_MIXER("Mic Preamp Right",
 243                 CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
 244
 245         /* HP */
 246         SND_SOC_DAPM_OUTPUT("HPL"),
 247         SND_SOC_DAPM_OUTPUT("HPR"),
 248
 249         /* mux */
 250         SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
 251                 &cs42l51_dac_mux_controls),
 252         SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
 253                 &cs42l51_adcl_mux_controls),
 254         SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
 255                 &cs42l51_adcr_mux_controls),
 256 };
 257
 258 static const struct snd_soc_dapm_route cs42l51_routes[] = {
 259         {"HPL", NULL, "Left DAC"},
 260         {"HPR", NULL, "Right DAC"},
 261
 262         {"Left ADC", NULL, "Left PGA"},
 263         {"Right ADC", NULL, "Right PGA"},
 264
 265         {"Mic Preamp Left",  NULL,  "MICL"},
 266         {"Mic Preamp Right", NULL,  "MICR"},
 267
 268         {"PGA-ADC Mux Left",  "AIN1 Left",        "AIN1L" },
 269         {"PGA-ADC Mux Left",  "AIN2 Left",        "AIN2L" },
 270         {"PGA-ADC Mux Left",  "MIC Left",         "MICL"  },
 271         {"PGA-ADC Mux Left",  "MIC+preamp Left",  "Mic Preamp Left" },
 272         {"PGA-ADC Mux Right", "AIN1 Right",       "AIN1R" },
 273         {"PGA-ADC Mux Right", "AIN2 Right",       "AIN2R" },
 274         {"PGA-ADC Mux Right", "MIC Right",        "MICR" },
 275         {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
 276
 277         {"Left PGA", NULL, "PGA-ADC Mux Left"},
 278         {"Right PGA", NULL, "PGA-ADC Mux Right"},
 279 };
 280
 281 static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
 282                 unsigned int format)
 283 {
 284         struct snd_soc_codec *codec = codec_dai->codec;
 285         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 286
 287         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 288         case SND_SOC_DAIFMT_I2S:
 289         case SND_SOC_DAIFMT_LEFT_J:
 290         case SND_SOC_DAIFMT_RIGHT_J:
 291                 cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
 292                 break;
 293         default:
 294                 dev_err(codec->dev, "invalid DAI format\n");
 295                 return -EINVAL;
 296         }
 297
 298         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 299         case SND_SOC_DAIFMT_CBM_CFM:
 300                 cs42l51->func = MODE_MASTER;
 301                 break;
 302         case SND_SOC_DAIFMT_CBS_CFS:
 303                 cs42l51->func = MODE_SLAVE_AUTO;
 304                 break;
 305         default:
 306                 dev_err(codec->dev, "Unknown master/slave configuration\n");
 307                 return -EINVAL;
 308         }
 309
 310         return 0;
 311 }
 312
 313 struct cs42l51_ratios {
 314         unsigned int ratio;
 315         unsigned char speed_mode;
 316         unsigned char mclk;
 317 };
 318
 319 static struct cs42l51_ratios slave_ratios[] = {
 320         {  512, CS42L51_QSM_MODE, 0 }, {  768, CS42L51_QSM_MODE, 0 },
 321         { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 322         { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
 323         {  256, CS42L51_HSM_MODE, 0 }, {  384, CS42L51_HSM_MODE, 0 },
 324         {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 325         { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
 326         {  128, CS42L51_SSM_MODE, 0 }, {  192, CS42L51_SSM_MODE, 0 },
 327         {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 328         {  512, CS42L51_SSM_MODE, 0 }, {  768, CS42L51_SSM_MODE, 0 },
 329         {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 330         {  256, CS42L51_DSM_MODE, 0 }, {  384, CS42L51_DSM_MODE, 0 },
 331 };
 332
 333 static struct cs42l51_ratios slave_auto_ratios[] = {
 334         { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 335         { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
 336         {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 337         { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
 338         {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 339         {  512, CS42L51_SSM_MODE, 1 }, {  768, CS42L51_SSM_MODE, 1 },
 340         {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 341         {  256, CS42L51_DSM_MODE, 1 }, {  384, CS42L51_DSM_MODE, 1 },
 342 };
 343
 344 static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 345                 int clk_id, unsigned int freq, int dir)
 346 {
 347         struct snd_soc_codec *codec = codec_dai->codec;
 348         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 349
 350         cs42l51->mclk = freq;
 351         return 0;
 352 }
 353
 354 static int cs42l51_hw_params(struct snd_pcm_substream *substream,
 355                 struct snd_pcm_hw_params *params,
 356                 struct snd_soc_dai *dai)
 357 {
 358         struct snd_soc_codec *codec = dai->codec;
 359         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 360         int ret;
 361         unsigned int i;
 362         unsigned int rate;
 363         unsigned int ratio;
 364         struct cs42l51_ratios *ratios = NULL;
 365         int nr_ratios = 0;
 366         int intf_ctl, power_ctl, fmt;
 367
 368         switch (cs42l51->func) {
 369         case MODE_MASTER:
 370                 return -EINVAL;
 371         case MODE_SLAVE:
 372                 ratios = slave_ratios;
 373                 nr_ratios = ARRAY_SIZE(slave_ratios);
 374                 break;
 375         case MODE_SLAVE_AUTO:
 376                 ratios = slave_auto_ratios;
 377                 nr_ratios = ARRAY_SIZE(slave_auto_ratios);
 378                 break;
 379         }
 380
 381         /* Figure out which MCLK/LRCK ratio to use */
 382         rate = params_rate(params);     /* Sampling rate, in Hz */
 383         ratio = cs42l51->mclk / rate;    /* MCLK/LRCK ratio */
 384         for (i = 0; i < nr_ratios; i++) {
 385                 if (ratios[i].ratio == ratio)
 386                         break;
 387         }
 388
 389         if (i == nr_ratios) {
 390                 /* We did not find a matching ratio */
 391                 dev_err(codec->dev, "could not find matching ratio\n");
 392                 return -EINVAL;
 393         }
 394
 395         intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
 396         power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
 397
 398         intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
 399                         | CS42L51_INTF_CTL_DAC_FORMAT(7));
 400         power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
 401                         | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
 402
 403         switch (cs42l51->func) {
 404         case MODE_MASTER:
 405                 intf_ctl |= CS42L51_INTF_CTL_MASTER;
 406                 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 407                 break;
 408         case MODE_SLAVE:
 409                 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 410                 break;
 411         case MODE_SLAVE_AUTO:
 412                 power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
 413                 break;
 414         }
 415
 416         switch (cs42l51->audio_mode) {
 417         case SND_SOC_DAIFMT_I2S:
 418                 intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
 419                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
 420                 break;
 421         case SND_SOC_DAIFMT_LEFT_J:
 422                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
 423                 break;
 424         case SND_SOC_DAIFMT_RIGHT_J:
 425                 switch (params_format(params)) {
 426                 case SNDRV_PCM_FORMAT_S16_LE:
 427                 case SNDRV_PCM_FORMAT_S16_BE:
 428                         fmt = CS42L51_DAC_DIF_RJ16;
 429                         break;
 430                 case SNDRV_PCM_FORMAT_S18_3LE:
 431                 case SNDRV_PCM_FORMAT_S18_3BE:
 432                         fmt = CS42L51_DAC_DIF_RJ18;
 433                         break;
 434                 case SNDRV_PCM_FORMAT_S20_3LE:
 435                 case SNDRV_PCM_FORMAT_S20_3BE:
 436                         fmt = CS42L51_DAC_DIF_RJ20;
 437                         break;
 438                 case SNDRV_PCM_FORMAT_S24_LE:
 439                 case SNDRV_PCM_FORMAT_S24_BE:
 440                         fmt = CS42L51_DAC_DIF_RJ24;
 441                         break;
 442                 default:
 443                         dev_err(codec->dev, "unknown format\n");
 444                         return -EINVAL;
 445                 }
 446                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
 447                 break;
 448         default:
 449                 dev_err(codec->dev, "unknown format\n");
 450                 return -EINVAL;
 451         }
 452
 453         if (ratios[i].mclk)
 454                 power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
 455
 456         ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
 457         if (ret < 0)
 458                 return ret;
 459
 460         ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
 461         if (ret < 0)
 462                 return ret;
 463
 464         return 0;
 465 }
 466
 467 static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
 468 {
 469         struct snd_soc_codec *codec = dai->codec;
 470         int reg;
 471         int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
 472
 473         reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
 474
 475         if (mute)
 476                 reg |= mask;
 477         else
 478                 reg &= ~mask;
 479
 480         return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
 481 }
 482
 483 static const struct snd_soc_dai_ops cs42l51_dai_ops = {
 484         .hw_params      = cs42l51_hw_params,
 485         .set_sysclk     = cs42l51_set_dai_sysclk,
 486         .set_fmt        = cs42l51_set_dai_fmt,
 487         .digital_mute   = cs42l51_dai_mute,
 488 };
 489
 490 static struct snd_soc_dai_driver cs42l51_dai = {
 491         .name = "cs42l51-hifi",
 492         .playback = {
 493                 .stream_name = "Playback",
 494                 .channels_min = 1,
 495                 .channels_max = 2,
 496                 .rates = SNDRV_PCM_RATE_8000_96000,
 497                 .formats = CS42L51_FORMATS,
 498         },
 499         .capture = {
 500                 .stream_name = "Capture",
 501                 .channels_min = 1,
 502                 .channels_max = 2,
 503                 .rates = SNDRV_PCM_RATE_8000_96000,
 504                 .formats = CS42L51_FORMATS,
 505         },
 506         .ops = &cs42l51_dai_ops,
 507 };
 508
 509 static int cs42l51_probe(struct snd_soc_codec *codec)
 510 {
 511         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 512         int ret, reg;
 513
 514         ret = cs42l51_fill_cache(codec);
 515         if (ret < 0) {
 516                 dev_err(codec->dev, "failed to fill register cache\n");
 517                 return ret;
 518         }
 519
 520         ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
 521         if (ret < 0) {
 522                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 523                 return ret;
 524         }
 525
 526         /*
 527          * DAC configuration
 528          * - Use signal processor
 529          * - auto mute
 530          * - vol changes immediate
 531          * - no de-emphasize
 532          */
 533         reg = CS42L51_DAC_CTL_DATA_SEL(1)
 534                 | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
 535         ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
 536         if (ret < 0)
 537                 return ret;
 538
 539         return 0;
 540 }
 541
 542 static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
 543         .probe = cs42l51_probe,
 544         .reg_cache_size = CS42L51_NUMREGS + 1,
 545         .reg_word_size = sizeof(u8),
 546
 547         .controls = cs42l51_snd_controls,
 548         .num_controls = ARRAY_SIZE(cs42l51_snd_controls),
 549         .dapm_widgets = cs42l51_dapm_widgets,
 550         .num_dapm_widgets = ARRAY_SIZE(cs42l51_dapm_widgets),
 551         .dapm_routes = cs42l51_routes,
 552         .num_dapm_routes = ARRAY_SIZE(cs42l51_routes),
 553 };
 554
 555 static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
 556         const struct i2c_device_id *id)
 557 {
 558         struct cs42l51_private *cs42l51;
 559         int ret;
 560
 561         /* Verify that we have a CS42L51 */
 562         ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
 563         if (ret < 0) {
 564                 dev_err(&i2c_client->dev, "failed to read I2C\n");
 565                 goto error;
 566         }
 567
 568         if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
 569             (ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
 570                 dev_err(&i2c_client->dev, "Invalid chip id\n");
 571                 ret = -ENODEV;
 572                 goto error;
 573         }
 574
 575         dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
 576                                 ret & 7);
 577
 578         cs42l51 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs42l51_private),
 579                                GFP_KERNEL);
 580         if (!cs42l51) {
 581                 dev_err(&i2c_client->dev, "could not allocate codec\n");
 582                 return -ENOMEM;
 583         }
 584
 585         i2c_set_clientdata(i2c_client, cs42l51);
 586         cs42l51->control_type = SND_SOC_I2C;
 587
 588         ret =  snd_soc_register_codec(&i2c_client->dev,
 589                         &soc_codec_device_cs42l51, &cs42l51_dai, 1);
 590 error:
 591         return ret;
 592 }
 593
 594 static int cs42l51_i2c_remove(struct i2c_client *client)
 595 {
 596         snd_soc_unregister_codec(&client->dev);
 597         return 0;
 598 }
 599
 600 static const struct i2c_device_id cs42l51_id[] = {
 601         {"cs42l51", 0},
 602         {}
 603 };
 604 MODULE_DEVICE_TABLE(i2c, cs42l51_id);
 605
 606 static struct i2c_driver cs42l51_i2c_driver = {
 607         .driver = {
 608                 .name = "cs42l51-codec",
 609                 .owner = THIS_MODULE,
 610         },
 611         .id_table = cs42l51_id,
 612         .probe = cs42l51_i2c_probe,
 613         .remove = cs42l51_i2c_remove,
 614 };
 615
 616 module_i2c_driver(cs42l51_i2c_driver);
 617
 618 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 619 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
 620 MODULE_LICENSE("GPL");