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/tlv.h>
  30 #include <sound/initval.h>
  31 #include <sound/pcm_params.h>
  32 #include <sound/pcm.h>
  33 #include <linux/i2c.h>
  34
  35 #include "cs42l51.h"
  36
  37 enum master_slave_mode {
  38         MODE_SLAVE,
  39         MODE_SLAVE_AUTO,
  40         MODE_MASTER,
  41 };
  42
  43 struct cs42l51_private {
  44         enum snd_soc_control_type control_type;
  45         unsigned int mclk;
  46         unsigned int audio_mode;        /* The mode (I2S or left-justified) */
  47         enum master_slave_mode func;
  48 };
  49
  50 #define CS42L51_FORMATS ( \
  51                 SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
  52                 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
  53                 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
  54                 SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE)
  55
  56 static int cs42l51_fill_cache(struct snd_soc_codec *codec)
  57 {
  58         u8 *cache = codec->reg_cache + 1;
  59         struct i2c_client *i2c_client = to_i2c_client(codec->dev);
  60         s32 length;
  61
  62         length = i2c_smbus_read_i2c_block_data(i2c_client,
  63                         CS42L51_FIRSTREG | 0x80, CS42L51_NUMREGS, cache);
  64         if (length != CS42L51_NUMREGS) {
  65                 dev_err(&i2c_client->dev,
  66                                 "I2C read failure, addr=0x%x (ret=%d vs %d)\n",
  67                                 i2c_client->addr, length, CS42L51_NUMREGS);
  68                 return -EIO;
  69         }
  70
  71         return 0;
  72 }
  73
  74 static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
  75                         struct snd_ctl_elem_value *ucontrol)
  76 {
  77         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
  78         unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
  79
  80         switch (value) {
  81         default:
  82         case 0:
  83                 ucontrol->value.integer.value[0] = 0;
  84                 break;
  85         /* same value : (L+R)/2 and (R+L)/2 */
  86         case 1:
  87         case 2:
  88                 ucontrol->value.integer.value[0] = 1;
  89                 break;
  90         case 3:
  91                 ucontrol->value.integer.value[0] = 2;
  92                 break;
  93         }
  94
  95         return 0;
  96 }
  97
  98 #define CHAN_MIX_NORMAL 0x00
  99 #define CHAN_MIX_BOTH   0x55
 100 #define CHAN_MIX_SWAP   0xFF
 101
 102 static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
 103                         struct snd_ctl_elem_value *ucontrol)
 104 {
 105         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 106         unsigned char val;
 107
 108         switch (ucontrol->value.integer.value[0]) {
 109         default:
 110         case 0:
 111                 val = CHAN_MIX_NORMAL;
 112                 break;
 113         case 1:
 114                 val = CHAN_MIX_BOTH;
 115                 break;
 116         case 2:
 117                 val = CHAN_MIX_SWAP;
 118                 break;
 119         }
 120
 121         snd_soc_write(codec, CS42L51_PCM_MIXER, val);
 122
 123         return 1;
 124 }
 125
 126 static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
 127 static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
 128 /* This is a lie. after -102 db, it stays at -102 */
 129 /* maybe a range would be better */
 130 static const DECLARE_TLV_DB_SCALE(aout_tlv, -11550, 50, 0);
 131
 132 static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
 133 static const char *chan_mix[] = {
 134         "L R",
 135         "L+R",
 136         "R L",
 137 };
 138
 139 static const struct soc_enum cs42l51_chan_mix =
 140         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);
 141
 142 static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
 143         SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
 144                         CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
 145                         7, 0xffffff99, 0x18, adc_pcm_tlv),
 146         SOC_DOUBLE_R("PCM Playback Switch",
 147                         CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
 148         SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
 149                         CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
 150                         8, 0xffffff19, 0x18, aout_tlv),
 151         SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
 152                         CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
 153                         7, 0xffffff99, 0x18, adc_pcm_tlv),
 154         SOC_DOUBLE_R("ADC Mixer Switch",
 155                         CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
 156         SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
 157         SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
 158         SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
 159         SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
 160         SOC_DOUBLE_TLV("Mic Boost Volume",
 161                         CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
 162         SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
 163         SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
 164         SOC_ENUM_EXT("PCM channel mixer",
 165                         cs42l51_chan_mix,
 166                         cs42l51_get_chan_mix, cs42l51_set_chan_mix),
 167 };
 168
 169 /*
 170  * to power down, one must:
 171  * 1.) Enable the PDN bit
 172  * 2.) enable power-down for the select channels
 173  * 3.) disable the PDN bit.
 174  */
 175 static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
 176                 struct snd_kcontrol *kcontrol, int event)
 177 {
 178         unsigned long value;
 179
 180         value = snd_soc_read(w->codec, CS42L51_POWER_CTL1);
 181         value &= ~CS42L51_POWER_CTL1_PDN;
 182
 183         switch (event) {
 184         case SND_SOC_DAPM_PRE_PMD:
 185                 value |= CS42L51_POWER_CTL1_PDN;
 186                 break;
 187         default:
 188         case SND_SOC_DAPM_POST_PMD:
 189                 break;
 190         }
 191         snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
 192                 CS42L51_POWER_CTL1_PDN, value);
 193
 194         return 0;
 195 }
 196
 197 static const char *cs42l51_dac_names[] = {"Direct PCM",
 198         "DSP PCM", "ADC"};
 199 static const struct soc_enum cs42l51_dac_mux_enum =
 200         SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
 201 static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
 202         SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
 203
 204 static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
 205         "MIC Left", "MIC+preamp Left"};
 206 static const struct soc_enum cs42l51_adcl_mux_enum =
 207         SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
 208 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
 209         SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
 210
 211 static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
 212         "MIC Right", "MIC+preamp Right"};
 213 static const struct soc_enum cs42l51_adcr_mux_enum =
 214         SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
 215 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
 216         SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
 217
 218 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
 219         SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
 220         SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
 221                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 222         SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
 223                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 224         SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
 225                 CS42L51_POWER_CTL1, 1, 1,
 226                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 227         SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
 228                 CS42L51_POWER_CTL1, 2, 1,
 229                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 230         SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
 231                 CS42L51_POWER_CTL1, 5, 1,
 232                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 233         SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
 234                 CS42L51_POWER_CTL1, 6, 1,
 235                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
 236
 237         /* analog/mic */
 238         SND_SOC_DAPM_INPUT("AIN1L"),
 239         SND_SOC_DAPM_INPUT("AIN1R"),
 240         SND_SOC_DAPM_INPUT("AIN2L"),
 241         SND_SOC_DAPM_INPUT("AIN2R"),
 242         SND_SOC_DAPM_INPUT("MICL"),
 243         SND_SOC_DAPM_INPUT("MICR"),
 244
 245         SND_SOC_DAPM_MIXER("Mic Preamp Left",
 246                 CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
 247         SND_SOC_DAPM_MIXER("Mic Preamp Right",
 248                 CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
 249
 250         /* HP */
 251         SND_SOC_DAPM_OUTPUT("HPL"),
 252         SND_SOC_DAPM_OUTPUT("HPR"),
 253
 254         /* mux */
 255         SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
 256                 &cs42l51_dac_mux_controls),
 257         SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
 258                 &cs42l51_adcl_mux_controls),
 259         SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
 260                 &cs42l51_adcr_mux_controls),
 261 };
 262
 263 static const struct snd_soc_dapm_route cs42l51_routes[] = {
 264         {"HPL", NULL, "Left DAC"},
 265         {"HPR", NULL, "Right DAC"},
 266
 267         {"Left ADC", NULL, "Left PGA"},
 268         {"Right ADC", NULL, "Right PGA"},
 269
 270         {"Mic Preamp Left",  NULL,  "MICL"},
 271         {"Mic Preamp Right", NULL,  "MICR"},
 272
 273         {"PGA-ADC Mux Left",  "AIN1 Left",        "AIN1L" },
 274         {"PGA-ADC Mux Left",  "AIN2 Left",        "AIN2L" },
 275         {"PGA-ADC Mux Left",  "MIC Left",         "MICL"  },
 276         {"PGA-ADC Mux Left",  "MIC+preamp Left",  "Mic Preamp Left" },
 277         {"PGA-ADC Mux Right", "AIN1 Right",       "AIN1R" },
 278         {"PGA-ADC Mux Right", "AIN2 Right",       "AIN2R" },
 279         {"PGA-ADC Mux Right", "MIC Right",        "MICR" },
 280         {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
 281
 282         {"Left PGA", NULL, "PGA-ADC Mux Left"},
 283         {"Right PGA", NULL, "PGA-ADC Mux Right"},
 284 };
 285
 286 static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
 287                 unsigned int format)
 288 {
 289         struct snd_soc_codec *codec = codec_dai->codec;
 290         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 291
 292         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
 293         case SND_SOC_DAIFMT_I2S:
 294         case SND_SOC_DAIFMT_LEFT_J:
 295         case SND_SOC_DAIFMT_RIGHT_J:
 296                 cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
 297                 break;
 298         default:
 299                 dev_err(codec->dev, "invalid DAI format\n");
 300                 return -EINVAL;
 301         }
 302
 303         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
 304         case SND_SOC_DAIFMT_CBM_CFM:
 305                 cs42l51->func = MODE_MASTER;
 306                 break;
 307         case SND_SOC_DAIFMT_CBS_CFS:
 308                 cs42l51->func = MODE_SLAVE_AUTO;
 309                 break;
 310         default:
 311                 dev_err(codec->dev, "Unknown master/slave configuration\n");
 312                 return -EINVAL;
 313         }
 314
 315         return 0;
 316 }
 317
 318 struct cs42l51_ratios {
 319         unsigned int ratio;
 320         unsigned char speed_mode;
 321         unsigned char mclk;
 322 };
 323
 324 static struct cs42l51_ratios slave_ratios[] = {
 325         {  512, CS42L51_QSM_MODE, 0 }, {  768, CS42L51_QSM_MODE, 0 },
 326         { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 327         { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
 328         {  256, CS42L51_HSM_MODE, 0 }, {  384, CS42L51_HSM_MODE, 0 },
 329         {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 330         { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
 331         {  128, CS42L51_SSM_MODE, 0 }, {  192, CS42L51_SSM_MODE, 0 },
 332         {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 333         {  512, CS42L51_SSM_MODE, 0 }, {  768, CS42L51_SSM_MODE, 0 },
 334         {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 335         {  256, CS42L51_DSM_MODE, 0 }, {  384, CS42L51_DSM_MODE, 0 },
 336 };
 337
 338 static struct cs42l51_ratios slave_auto_ratios[] = {
 339         { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
 340         { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
 341         {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
 342         { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
 343         {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
 344         {  512, CS42L51_SSM_MODE, 1 }, {  768, CS42L51_SSM_MODE, 1 },
 345         {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
 346         {  256, CS42L51_DSM_MODE, 1 }, {  384, CS42L51_DSM_MODE, 1 },
 347 };
 348
 349 static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 350                 int clk_id, unsigned int freq, int dir)
 351 {
 352         struct snd_soc_codec *codec = codec_dai->codec;
 353         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 354
 355         cs42l51->mclk = freq;
 356         return 0;
 357 }
 358
 359 static int cs42l51_hw_params(struct snd_pcm_substream *substream,
 360                 struct snd_pcm_hw_params *params,
 361                 struct snd_soc_dai *dai)
 362 {
 363         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 364         struct snd_soc_codec *codec = rtd->codec;
 365         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 366         int ret;
 367         unsigned int i;
 368         unsigned int rate;
 369         unsigned int ratio;
 370         struct cs42l51_ratios *ratios = NULL;
 371         int nr_ratios = 0;
 372         int intf_ctl, power_ctl, fmt;
 373
 374         switch (cs42l51->func) {
 375         case MODE_MASTER:
 376                 return -EINVAL;
 377         case MODE_SLAVE:
 378                 ratios = slave_ratios;
 379                 nr_ratios = ARRAY_SIZE(slave_ratios);
 380                 break;
 381         case MODE_SLAVE_AUTO:
 382                 ratios = slave_auto_ratios;
 383                 nr_ratios = ARRAY_SIZE(slave_auto_ratios);
 384                 break;
 385         }
 386
 387         /* Figure out which MCLK/LRCK ratio to use */
 388         rate = params_rate(params);     /* Sampling rate, in Hz */
 389         ratio = cs42l51->mclk / rate;    /* MCLK/LRCK ratio */
 390         for (i = 0; i < nr_ratios; i++) {
 391                 if (ratios[i].ratio == ratio)
 392                         break;
 393         }
 394
 395         if (i == nr_ratios) {
 396                 /* We did not find a matching ratio */
 397                 dev_err(codec->dev, "could not find matching ratio\n");
 398                 return -EINVAL;
 399         }
 400
 401         intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
 402         power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
 403
 404         intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
 405                         | CS42L51_INTF_CTL_DAC_FORMAT(7));
 406         power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
 407                         | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
 408
 409         switch (cs42l51->func) {
 410         case MODE_MASTER:
 411                 intf_ctl |= CS42L51_INTF_CTL_MASTER;
 412                 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 413                 break;
 414         case MODE_SLAVE:
 415                 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
 416                 break;
 417         case MODE_SLAVE_AUTO:
 418                 power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
 419                 break;
 420         }
 421
 422         switch (cs42l51->audio_mode) {
 423         case SND_SOC_DAIFMT_I2S:
 424                 intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
 425                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
 426                 break;
 427         case SND_SOC_DAIFMT_LEFT_J:
 428                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
 429                 break;
 430         case SND_SOC_DAIFMT_RIGHT_J:
 431                 switch (params_format(params)) {
 432                 case SNDRV_PCM_FORMAT_S16_LE:
 433                 case SNDRV_PCM_FORMAT_S16_BE:
 434                         fmt = CS42L51_DAC_DIF_RJ16;
 435                         break;
 436                 case SNDRV_PCM_FORMAT_S18_3LE:
 437                 case SNDRV_PCM_FORMAT_S18_3BE:
 438                         fmt = CS42L51_DAC_DIF_RJ18;
 439                         break;
 440                 case SNDRV_PCM_FORMAT_S20_3LE:
 441                 case SNDRV_PCM_FORMAT_S20_3BE:
 442                         fmt = CS42L51_DAC_DIF_RJ20;
 443                         break;
 444                 case SNDRV_PCM_FORMAT_S24_LE:
 445                 case SNDRV_PCM_FORMAT_S24_BE:
 446                         fmt = CS42L51_DAC_DIF_RJ24;
 447                         break;
 448                 default:
 449                         dev_err(codec->dev, "unknown format\n");
 450                         return -EINVAL;
 451                 }
 452                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
 453                 break;
 454         default:
 455                 dev_err(codec->dev, "unknown format\n");
 456                 return -EINVAL;
 457         }
 458
 459         if (ratios[i].mclk)
 460                 power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
 461
 462         ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
 463         if (ret < 0)
 464                 return ret;
 465
 466         ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
 467         if (ret < 0)
 468                 return ret;
 469
 470         return 0;
 471 }
 472
 473 static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
 474 {
 475         struct snd_soc_codec *codec = dai->codec;
 476         int reg;
 477         int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
 478
 479         reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
 480
 481         if (mute)
 482                 reg |= mask;
 483         else
 484                 reg &= ~mask;
 485
 486         return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
 487 }
 488
 489 static struct snd_soc_dai_ops cs42l51_dai_ops = {
 490         .hw_params      = cs42l51_hw_params,
 491         .set_sysclk     = cs42l51_set_dai_sysclk,
 492         .set_fmt        = cs42l51_set_dai_fmt,
 493         .digital_mute   = cs42l51_dai_mute,
 494 };
 495
 496 static struct snd_soc_dai_driver cs42l51_dai = {
 497         .name = "cs42l51-hifi",
 498         .playback = {
 499                 .stream_name = "Playback",
 500                 .channels_min = 1,
 501                 .channels_max = 2,
 502                 .rates = SNDRV_PCM_RATE_8000_96000,
 503                 .formats = CS42L51_FORMATS,
 504         },
 505         .capture = {
 506                 .stream_name = "Capture",
 507                 .channels_min = 1,
 508                 .channels_max = 2,
 509                 .rates = SNDRV_PCM_RATE_8000_96000,
 510                 .formats = CS42L51_FORMATS,
 511         },
 512         .ops = &cs42l51_dai_ops,
 513 };
 514
 515 static int cs42l51_probe(struct snd_soc_codec *codec)
 516 {
 517         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 518         struct snd_soc_dapm_context *dapm = &codec->dapm;
 519         int ret, reg;
 520
 521         ret = cs42l51_fill_cache(codec);
 522         if (ret < 0) {
 523                 dev_err(codec->dev, "failed to fill register cache\n");
 524                 return ret;
 525         }
 526
 527         ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
 528         if (ret < 0) {
 529                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 530                 return ret;
 531         }
 532
 533         /*
 534          * DAC configuration
 535          * - Use signal processor
 536          * - auto mute
 537          * - vol changes immediate
 538          * - no de-emphasize
 539          */
 540         reg = CS42L51_DAC_CTL_DATA_SEL(1)
 541                 | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
 542         ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
 543         if (ret < 0)
 544                 return ret;
 545
 546         snd_soc_add_controls(codec, cs42l51_snd_controls,
 547                 ARRAY_SIZE(cs42l51_snd_controls));
 548         snd_soc_dapm_new_controls(dapm, cs42l51_dapm_widgets,
 549                 ARRAY_SIZE(cs42l51_dapm_widgets));
 550         snd_soc_dapm_add_routes(dapm, cs42l51_routes,
 551                 ARRAY_SIZE(cs42l51_routes));
 552
 553         return 0;
 554 }
 555
 556 static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
 557         .probe =        cs42l51_probe,
 558         .reg_cache_size = CS42L51_NUMREGS,
 559         .reg_word_size = sizeof(u8),
 560 };
 561
 562 static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
 563         const struct i2c_device_id *id)
 564 {
 565         struct cs42l51_private *cs42l51;
 566         int ret;
 567
 568         /* Verify that we have a CS42L51 */
 569         ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
 570         if (ret < 0) {
 571                 dev_err(&i2c_client->dev, "failed to read I2C\n");
 572                 goto error;
 573         }
 574
 575         if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
 576             (ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
 577                 dev_err(&i2c_client->dev, "Invalid chip id\n");
 578                 ret = -ENODEV;
 579                 goto error;
 580         }
 581
 582         dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
 583                                 ret & 7);
 584
 585         cs42l51 = kzalloc(sizeof(struct cs42l51_private), GFP_KERNEL);
 586         if (!cs42l51) {
 587                 dev_err(&i2c_client->dev, "could not allocate codec\n");
 588                 return -ENOMEM;
 589         }
 590
 591         i2c_set_clientdata(i2c_client, cs42l51);
 592         cs42l51->control_type = SND_SOC_I2C;
 593
 594         ret =  snd_soc_register_codec(&i2c_client->dev,
 595                         &soc_codec_device_cs42l51, &cs42l51_dai, 1);
 596         if (ret < 0)
 597                 kfree(cs42l51);
 598 error:
 599         return ret;
 600 }
 601
 602 static int cs42l51_i2c_remove(struct i2c_client *client)
 603 {
 604         struct cs42l51_private *cs42l51 = i2c_get_clientdata(client);
 605
 606         snd_soc_unregister_codec(&client->dev);
 607         kfree(cs42l51);
 608         return 0;
 609 }
 610
 611 static const struct i2c_device_id cs42l51_id[] = {
 612         {"cs42l51", 0},
 613         {}
 614 };
 615 MODULE_DEVICE_TABLE(i2c, cs42l51_id);
 616
 617 static struct i2c_driver cs42l51_i2c_driver = {
 618         .driver = {
 619                 .name = "cs42l51-codec",
 620                 .owner = THIS_MODULE,
 621         },
 622         .id_table = cs42l51_id,
 623         .probe = cs42l51_i2c_probe,
 624         .remove = cs42l51_i2c_remove,
 625 };
 626
 627 static int __init cs42l51_init(void)
 628 {
 629         int ret;
 630
 631         ret = i2c_add_driver(&cs42l51_i2c_driver);
 632         if (ret != 0) {
 633                 printk(KERN_ERR "%s: can't add i2c driver\n", __func__);
 634                 return ret;
 635         }
 636         return 0;
 637 }
 638 module_init(cs42l51_init);
 639
 640 static void __exit cs42l51_exit(void)
 641 {
 642         i2c_del_driver(&cs42l51_i2c_driver);
 643 }
 644 module_exit(cs42l51_exit);
 645
 646 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
 647 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
 648 MODULE_LICENSE("GPL");