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