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