sound/soc/codecs/max98927.c

   1 /*
   2  * max98927.c  --  MAX98927 ALSA Soc Audio driver
   3  *
   4  * Copyright (C) 2016 Maxim Integrated Products
   5  * Author: Ryan Lee <ryans.lee@maximintegrated.com>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  */
  12
  13 #include <linux/acpi.h>
  14 #include <linux/i2c.h>
  15 #include <linux/module.h>
  16 #include <linux/regmap.h>
  17 #include <linux/slab.h>
  18 #include <linux/cdev.h>
  19 #include <sound/pcm.h>
  20 #include <sound/pcm_params.h>
  21 #include <sound/soc.h>
  22 #include <linux/gpio.h>
  23 #include <linux/of_gpio.h>
  24 #include <sound/tlv.h>
  25 #include "max98927.h"
  26
  27 static struct reg_default max98927_reg[] = {
  28         {MAX98927_R0001_INT_RAW1,  0x00},
  29         {MAX98927_R0002_INT_RAW2,  0x00},
  30         {MAX98927_R0003_INT_RAW3,  0x00},
  31         {MAX98927_R0004_INT_STATE1,  0x00},
  32         {MAX98927_R0005_INT_STATE2,  0x00},
  33         {MAX98927_R0006_INT_STATE3,  0x00},
  34         {MAX98927_R0007_INT_FLAG1,  0x00},
  35         {MAX98927_R0008_INT_FLAG2,  0x00},
  36         {MAX98927_R0009_INT_FLAG3,  0x00},
  37         {MAX98927_R000A_INT_EN1,  0x00},
  38         {MAX98927_R000B_INT_EN2,  0x00},
  39         {MAX98927_R000C_INT_EN3,  0x00},
  40         {MAX98927_R000D_INT_FLAG_CLR1,  0x00},
  41         {MAX98927_R000E_INT_FLAG_CLR2,  0x00},
  42         {MAX98927_R000F_INT_FLAG_CLR3,  0x00},
  43         {MAX98927_R0010_IRQ_CTRL,  0x00},
  44         {MAX98927_R0011_CLK_MON,  0x00},
  45         {MAX98927_R0012_WDOG_CTRL,  0x00},
  46         {MAX98927_R0013_WDOG_RST,  0x00},
  47         {MAX98927_R0014_MEAS_ADC_THERM_WARN_THRESH,  0x00},
  48         {MAX98927_R0015_MEAS_ADC_THERM_SHDN_THRESH,  0x00},
  49         {MAX98927_R0016_MEAS_ADC_THERM_HYSTERESIS,  0x00},
  50         {MAX98927_R0017_PIN_CFG,  0x55},
  51         {MAX98927_R0018_PCM_RX_EN_A,  0x00},
  52         {MAX98927_R0019_PCM_RX_EN_B,  0x00},
  53         {MAX98927_R001A_PCM_TX_EN_A,  0x00},
  54         {MAX98927_R001B_PCM_TX_EN_B,  0x00},
  55         {MAX98927_R001C_PCM_TX_HIZ_CTRL_A,  0x00},
  56         {MAX98927_R001D_PCM_TX_HIZ_CTRL_B,  0x00},
  57         {MAX98927_R001E_PCM_TX_CH_SRC_A,  0x00},
  58         {MAX98927_R001F_PCM_TX_CH_SRC_B,  0x00},
  59         {MAX98927_R0020_PCM_MODE_CFG,  0x40},
  60         {MAX98927_R0021_PCM_MASTER_MODE,  0x00},
  61         {MAX98927_R0022_PCM_CLK_SETUP,  0x22},
  62         {MAX98927_R0023_PCM_SR_SETUP1,  0x00},
  63         {MAX98927_R0024_PCM_SR_SETUP2,  0x00},
  64         {MAX98927_R0025_PCM_TO_SPK_MONOMIX_A,  0x00},
  65         {MAX98927_R0026_PCM_TO_SPK_MONOMIX_B,  0x00},
  66         {MAX98927_R0027_ICC_RX_EN_A,  0x00},
  67         {MAX98927_R0028_ICC_RX_EN_B,  0x00},
  68         {MAX98927_R002B_ICC_TX_EN_A,  0x00},
  69         {MAX98927_R002C_ICC_TX_EN_B,  0x00},
  70         {MAX98927_R002E_ICC_HIZ_MANUAL_MODE,  0x00},
  71         {MAX98927_R002F_ICC_TX_HIZ_EN_A,  0x00},
  72         {MAX98927_R0030_ICC_TX_HIZ_EN_B,  0x00},
  73         {MAX98927_R0031_ICC_LNK_EN,  0x00},
  74         {MAX98927_R0032_PDM_TX_EN,  0x00},
  75         {MAX98927_R0033_PDM_TX_HIZ_CTRL,  0x00},
  76         {MAX98927_R0034_PDM_TX_CTRL,  0x00},
  77         {MAX98927_R0035_PDM_RX_CTRL,  0x00},
  78         {MAX98927_R0036_AMP_VOL_CTRL,  0x00},
  79         {MAX98927_R0037_AMP_DSP_CFG,  0x02},
  80         {MAX98927_R0038_TONE_GEN_DC_CFG,  0x00},
  81         {MAX98927_R0039_DRE_CTRL,  0x01},
  82         {MAX98927_R003A_AMP_EN,  0x00},
  83         {MAX98927_R003B_SPK_SRC_SEL,  0x00},
  84         {MAX98927_R003C_SPK_GAIN,  0x00},
  85         {MAX98927_R003D_SSM_CFG,  0x01},
  86         {MAX98927_R003E_MEAS_EN,  0x00},
  87         {MAX98927_R003F_MEAS_DSP_CFG,  0x04},
  88         {MAX98927_R0040_BOOST_CTRL0,  0x00},
  89         {MAX98927_R0041_BOOST_CTRL3,  0x00},
  90         {MAX98927_R0042_BOOST_CTRL1,  0x00},
  91         {MAX98927_R0043_MEAS_ADC_CFG,  0x00},
  92         {MAX98927_R0044_MEAS_ADC_BASE_MSB,  0x00},
  93         {MAX98927_R0045_MEAS_ADC_BASE_LSB,  0x00},
  94         {MAX98927_R0046_ADC_CH0_DIVIDE,  0x00},
  95         {MAX98927_R0047_ADC_CH1_DIVIDE,  0x00},
  96         {MAX98927_R0048_ADC_CH2_DIVIDE,  0x00},
  97         {MAX98927_R0049_ADC_CH0_FILT_CFG,  0x00},
  98         {MAX98927_R004A_ADC_CH1_FILT_CFG,  0x00},
  99         {MAX98927_R004B_ADC_CH2_FILT_CFG,  0x00},
 100         {MAX98927_R004C_MEAS_ADC_CH0_READ,  0x00},
 101         {MAX98927_R004D_MEAS_ADC_CH1_READ,  0x00},
 102         {MAX98927_R004E_MEAS_ADC_CH2_READ,  0x00},
 103         {MAX98927_R0051_BROWNOUT_STATUS,  0x00},
 104         {MAX98927_R0052_BROWNOUT_EN,  0x00},
 105         {MAX98927_R0053_BROWNOUT_INFINITE_HOLD,  0x00},
 106         {MAX98927_R0054_BROWNOUT_INFINITE_HOLD_CLR,  0x00},
 107         {MAX98927_R0055_BROWNOUT_LVL_HOLD,  0x00},
 108         {MAX98927_R005A_BROWNOUT_LVL1_THRESH,  0x00},
 109         {MAX98927_R005B_BROWNOUT_LVL2_THRESH,  0x00},
 110         {MAX98927_R005C_BROWNOUT_LVL3_THRESH,  0x00},
 111         {MAX98927_R005D_BROWNOUT_LVL4_THRESH,  0x00},
 112         {MAX98927_R005E_BROWNOUT_THRESH_HYSTERYSIS,  0x00},
 113         {MAX98927_R005F_BROWNOUT_AMP_LIMITER_ATK_REL,  0x00},
 114         {MAX98927_R0060_BROWNOUT_AMP_GAIN_ATK_REL,  0x00},
 115         {MAX98927_R0061_BROWNOUT_AMP1_CLIP_MODE,  0x00},
 116         {MAX98927_R0072_BROWNOUT_LVL1_CUR_LIMIT,  0x00},
 117         {MAX98927_R0073_BROWNOUT_LVL1_AMP1_CTRL1,  0x00},
 118         {MAX98927_R0074_BROWNOUT_LVL1_AMP1_CTRL2,  0x00},
 119         {MAX98927_R0075_BROWNOUT_LVL1_AMP1_CTRL3,  0x00},
 120         {MAX98927_R0076_BROWNOUT_LVL2_CUR_LIMIT,  0x00},
 121         {MAX98927_R0077_BROWNOUT_LVL2_AMP1_CTRL1,  0x00},
 122         {MAX98927_R0078_BROWNOUT_LVL2_AMP1_CTRL2,  0x00},
 123         {MAX98927_R0079_BROWNOUT_LVL2_AMP1_CTRL3,  0x00},
 124         {MAX98927_R007A_BROWNOUT_LVL3_CUR_LIMIT,  0x00},
 125         {MAX98927_R007B_BROWNOUT_LVL3_AMP1_CTRL1,  0x00},
 126         {MAX98927_R007C_BROWNOUT_LVL3_AMP1_CTRL2,  0x00},
 127         {MAX98927_R007D_BROWNOUT_LVL3_AMP1_CTRL3,  0x00},
 128         {MAX98927_R007E_BROWNOUT_LVL4_CUR_LIMIT,  0x00},
 129         {MAX98927_R007F_BROWNOUT_LVL4_AMP1_CTRL1,  0x00},
 130         {MAX98927_R0080_BROWNOUT_LVL4_AMP1_CTRL2,  0x00},
 131         {MAX98927_R0081_BROWNOUT_LVL4_AMP1_CTRL3,  0x00},
 132         {MAX98927_R0082_ENV_TRACK_VOUT_HEADROOM,  0x00},
 133         {MAX98927_R0083_ENV_TRACK_BOOST_VOUT_DELAY,  0x00},
 134         {MAX98927_R0084_ENV_TRACK_REL_RATE,  0x00},
 135         {MAX98927_R0085_ENV_TRACK_HOLD_RATE,  0x00},
 136         {MAX98927_R0086_ENV_TRACK_CTRL,  0x00},
 137         {MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ,  0x00},
 138         {MAX98927_R00FF_GLOBAL_SHDN,  0x00},
 139         {MAX98927_R0100_SOFT_RESET,  0x00},
 140         {MAX98927_R01FF_REV_ID,  0x40},
 141 };
 142
 143 static int max98927_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 144 {
 145         struct snd_soc_codec *codec = codec_dai->codec;
 146         struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
 147         unsigned int mode = 0;
 148         unsigned int format = 0;
 149         unsigned int invert = 0;
 150
 151         dev_dbg(codec->dev, "%s: fmt 0x%08X\n", __func__, fmt);
 152
 153         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 154         case SND_SOC_DAIFMT_CBS_CFS:
 155                 mode = MAX98927_PCM_MASTER_MODE_SLAVE;
 156                 break;
 157         case SND_SOC_DAIFMT_CBM_CFM:
 158                 max98927->master = true;
 159                 mode = MAX98927_PCM_MASTER_MODE_MASTER;
 160                 break;
 161         default:
 162                 dev_err(codec->dev, "DAI clock mode unsupported");
 163                 return -EINVAL;
 164         }
 165
 166         regmap_update_bits(max98927->regmap,
 167                 MAX98927_R0021_PCM_MASTER_MODE,
 168                 MAX98927_PCM_MASTER_MODE_MASK,
 169                 mode);
 170
 171         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 172         case SND_SOC_DAIFMT_NB_NF:
 173                 break;
 174         case SND_SOC_DAIFMT_IB_NF:
 175                 invert = MAX98927_PCM_MODE_CFG_PCM_BCLKEDGE;
 176                 break;
 177         default:
 178                 dev_err(codec->dev, "DAI invert mode unsupported");
 179                 return -EINVAL;
 180         }
 181
 182         regmap_update_bits(max98927->regmap,
 183                 MAX98927_R0020_PCM_MODE_CFG,
 184                 MAX98927_PCM_MODE_CFG_PCM_BCLKEDGE,
 185                 invert);
 186
 187         /* interface format */
 188         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 189         case SND_SOC_DAIFMT_I2S:
 190                 max98927->iface |= SND_SOC_DAIFMT_I2S;
 191                 format = MAX98927_PCM_FORMAT_I2S;
 192                 break;
 193         case SND_SOC_DAIFMT_LEFT_J:
 194                 max98927->iface |= SND_SOC_DAIFMT_LEFT_J;
 195                 format = MAX98927_PCM_FORMAT_LJ;
 196                 break;
 197         case SND_SOC_DAIFMT_PDM:
 198                 max98927->iface |= SND_SOC_DAIFMT_PDM;
 199                 break;
 200         default:
 201                 return -EINVAL;
 202         }
 203
 204         /* pcm channel configuration */
 205         if (max98927->iface & (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_LEFT_J)) {
 206                 regmap_update_bits(max98927->regmap,
 207                         MAX98927_R0018_PCM_RX_EN_A,
 208                         MAX98927_PCM_RX_CH0_EN | MAX98927_PCM_RX_CH1_EN,
 209                         MAX98927_PCM_RX_CH0_EN | MAX98927_PCM_RX_CH1_EN);
 210
 211                 regmap_update_bits(max98927->regmap,
 212                         MAX98927_R0020_PCM_MODE_CFG,
 213                         MAX98927_PCM_MODE_CFG_FORMAT_MASK,
 214                         format << MAX98927_PCM_MODE_CFG_FORMAT_SHIFT);
 215
 216                 regmap_update_bits(max98927->regmap,
 217                         MAX98927_R003B_SPK_SRC_SEL,
 218                         MAX98927_SPK_SRC_MASK, 0);
 219
 220         } else
 221                 regmap_update_bits(max98927->regmap,
 222                         MAX98927_R0018_PCM_RX_EN_A,
 223                         MAX98927_PCM_RX_CH0_EN | MAX98927_PCM_RX_CH1_EN, 0);
 224
 225         /* pdm channel configuration */
 226         if (max98927->iface & SND_SOC_DAIFMT_PDM) {
 227                 regmap_update_bits(max98927->regmap,
 228                         MAX98927_R0035_PDM_RX_CTRL,
 229                         MAX98927_PDM_RX_EN_MASK, 1);
 230
 231                 regmap_update_bits(max98927->regmap,
 232                         MAX98927_R003B_SPK_SRC_SEL,
 233                         MAX98927_SPK_SRC_MASK, 3);
 234         } else
 235                 regmap_update_bits(max98927->regmap,
 236                         MAX98927_R0035_PDM_RX_CTRL,
 237                         MAX98927_PDM_RX_EN_MASK, 0);
 238         return 0;
 239 }
 240
 241 /* codec MCLK rate in master mode */
 242 static const int rate_table[] = {
 243         5644800, 6000000, 6144000, 6500000,
 244         9600000, 11289600, 12000000, 12288000,
 245         13000000, 19200000,
 246 };
 247
 248 static int max98927_set_clock(struct max98927_priv *max98927,
 249         struct snd_pcm_hw_params *params)
 250 {
 251         struct snd_soc_codec *codec = max98927->codec;
 252         /* BCLK/LRCLK ratio calculation */
 253         int blr_clk_ratio = params_channels(params) * max98927->ch_size;
 254         int value;
 255
 256         if (max98927->master) {
 257                 int i;
 258                 /* match rate to closest value */
 259                 for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
 260                         if (rate_table[i] >= max98927->sysclk)
 261                                 break;
 262                 }
 263                 if (i == ARRAY_SIZE(rate_table)) {
 264                         dev_err(codec->dev, "failed to find proper clock rate.\n");
 265                         return -EINVAL;
 266                 }
 267                 regmap_update_bits(max98927->regmap,
 268                         MAX98927_R0021_PCM_MASTER_MODE,
 269                         MAX98927_PCM_MASTER_MODE_MCLK_MASK,
 270                         i << MAX98927_PCM_MASTER_MODE_MCLK_RATE_SHIFT);
 271         }
 272
 273         switch (blr_clk_ratio) {
 274         case 32:
 275                 value = 2;
 276                 break;
 277         case 48:
 278                 value = 3;
 279                 break;
 280         case 64:
 281                 value = 4;
 282                 break;
 283         default:
 284                 return -EINVAL;
 285         }
 286         regmap_update_bits(max98927->regmap,
 287                 MAX98927_R0022_PCM_CLK_SETUP,
 288                 MAX98927_PCM_CLK_SETUP_BSEL_MASK,
 289                 value);
 290         return 0;
 291 }
 292
 293 static int max98927_dai_hw_params(struct snd_pcm_substream *substream,
 294         struct snd_pcm_hw_params *params,
 295         struct snd_soc_dai *dai)
 296 {
 297         struct snd_soc_codec *codec = dai->codec;
 298         struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
 299         unsigned int sampling_rate = 0;
 300         unsigned int chan_sz = 0;
 301
 302         /* pcm mode configuration */
 303         switch (snd_pcm_format_width(params_format(params))) {
 304         case 16:
 305                 chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_16;
 306                 break;
 307         case 24:
 308                 chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_24;
 309                 break;
 310         case 32:
 311                 chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_32;
 312                 break;
 313         default:
 314                 dev_err(codec->dev, "format unsupported %d",
 315                         params_format(params));
 316                 goto err;
 317         }
 318
 319         max98927->ch_size = snd_pcm_format_width(params_format(params));
 320
 321         regmap_update_bits(max98927->regmap,
 322                 MAX98927_R0020_PCM_MODE_CFG,
 323                 MAX98927_PCM_MODE_CFG_CHANSZ_MASK, chan_sz);
 324
 325         dev_dbg(codec->dev, "format supported %d",
 326                 params_format(params));
 327
 328         /* sampling rate configuration */
 329         switch (params_rate(params)) {
 330         case 8000:
 331                 sampling_rate = MAX98927_PCM_SR_SET1_SR_8000;
 332                 break;
 333         case 11025:
 334                 sampling_rate = MAX98927_PCM_SR_SET1_SR_11025;
 335                 break;
 336         case 12000:
 337                 sampling_rate = MAX98927_PCM_SR_SET1_SR_12000;
 338                 break;
 339         case 16000:
 340                 sampling_rate = MAX98927_PCM_SR_SET1_SR_16000;
 341                 break;
 342         case 22050:
 343                 sampling_rate = MAX98927_PCM_SR_SET1_SR_22050;
 344                 break;
 345         case 24000:
 346                 sampling_rate = MAX98927_PCM_SR_SET1_SR_24000;
 347                 break;
 348         case 32000:
 349                 sampling_rate = MAX98927_PCM_SR_SET1_SR_32000;
 350                 break;
 351         case 44100:
 352                 sampling_rate = MAX98927_PCM_SR_SET1_SR_44100;
 353                 break;
 354         case 48000:
 355                 sampling_rate = MAX98927_PCM_SR_SET1_SR_48000;
 356                 break;
 357         default:
 358                 dev_err(codec->dev, "rate %d not supported\n",
 359                         params_rate(params));
 360                 goto err;
 361         }
 362         /* set DAI_SR to correct LRCLK frequency */
 363         regmap_update_bits(max98927->regmap,
 364                 MAX98927_R0023_PCM_SR_SETUP1,
 365                 MAX98927_PCM_SR_SET1_SR_MASK,
 366                 sampling_rate);
 367         regmap_update_bits(max98927->regmap,
 368                 MAX98927_R0024_PCM_SR_SETUP2,
 369                 MAX98927_PCM_SR_SET2_SR_MASK,
 370                 sampling_rate << MAX98927_PCM_SR_SET2_SR_SHIFT);
 371
 372         /* set sampling rate of IV */
 373         if (max98927->interleave_mode &&
 374             sampling_rate > MAX98927_PCM_SR_SET1_SR_16000)
 375                 regmap_update_bits(max98927->regmap,
 376                         MAX98927_R0024_PCM_SR_SETUP2,
 377                         MAX98927_PCM_SR_SET2_IVADC_SR_MASK,
 378                         sampling_rate - 3);
 379         else
 380                 regmap_update_bits(max98927->regmap,
 381                         MAX98927_R0024_PCM_SR_SETUP2,
 382                         MAX98927_PCM_SR_SET2_IVADC_SR_MASK,
 383                         sampling_rate);
 384         return max98927_set_clock(max98927, params);
 385 err:
 386         return -EINVAL;
 387 }
 388
 389 #define MAX98927_RATES SNDRV_PCM_RATE_8000_48000
 390
 391 #define MAX98927_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
 392         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 393
 394 static int max98927_dai_set_sysclk(struct snd_soc_dai *dai,
 395         int clk_id, unsigned int freq, int dir)
 396 {
 397         struct snd_soc_codec *codec = dai->codec;
 398         struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
 399
 400         max98927->sysclk = freq;
 401         return 0;
 402 }
 403
 404 static const struct snd_soc_dai_ops max98927_dai_ops = {
 405         .set_sysclk = max98927_dai_set_sysclk,
 406         .set_fmt = max98927_dai_set_fmt,
 407         .hw_params = max98927_dai_hw_params,
 408 };
 409
 410 static int max98927_dac_event(struct snd_soc_dapm_widget *w,
 411         struct snd_kcontrol *kcontrol, int event)
 412 {
 413         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
 414         struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
 415
 416         switch (event) {
 417         case SND_SOC_DAPM_POST_PMU:
 418                 regmap_update_bits(max98927->regmap,
 419                         MAX98927_R003A_AMP_EN,
 420                         MAX98927_AMP_EN_MASK, 1);
 421                 /* enable VMON and IMON */
 422                 regmap_update_bits(max98927->regmap,
 423                         MAX98927_R003E_MEAS_EN,
 424                         MAX98927_MEAS_V_EN | MAX98927_MEAS_I_EN,
 425                         MAX98927_MEAS_V_EN | MAX98927_MEAS_I_EN);
 426                 regmap_update_bits(max98927->regmap,
 427                         MAX98927_R00FF_GLOBAL_SHDN,
 428                         MAX98927_GLOBAL_EN_MASK, 1);
 429                 break;
 430         case SND_SOC_DAPM_POST_PMD:
 431                 regmap_update_bits(max98927->regmap,
 432                         MAX98927_R00FF_GLOBAL_SHDN,
 433                         MAX98927_GLOBAL_EN_MASK, 0);
 434                 regmap_update_bits(max98927->regmap,
 435                         MAX98927_R003A_AMP_EN,
 436                         MAX98927_AMP_EN_MASK, 0);
 437                 /* disable VMON and IMON */
 438                 regmap_update_bits(max98927->regmap,
 439                         MAX98927_R003E_MEAS_EN,
 440                         MAX98927_MEAS_V_EN | MAX98927_MEAS_I_EN, 0);
 441                 break;
 442         default:
 443                 return 0;
 444         }
 445         return 0;
 446 }
 447
 448 static const char * const max98927_switch_text[] = {
 449         "Left", "Right", "LeftRight"};
 450
 451 static const struct soc_enum dai_sel_enum =
 452         SOC_ENUM_SINGLE(MAX98927_R0025_PCM_TO_SPK_MONOMIX_A,
 453                 MAX98927_PCM_TO_SPK_MONOMIX_CFG_SHIFT,
 454                 3, max98927_switch_text);
 455
 456 static const struct snd_kcontrol_new max98927_dai_controls =
 457         SOC_DAPM_ENUM("DAI Sel", dai_sel_enum);
 458
 459 static const struct snd_soc_dapm_widget max98927_dapm_widgets[] = {
 460         SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
 461         SND_SOC_DAPM_DAC_E("Amp Enable", "HiFi Playback", MAX98927_R003A_AMP_EN,
 462                 0, 0, max98927_dac_event,
 463                 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 464         SND_SOC_DAPM_MUX("DAI Sel Mux", SND_SOC_NOPM, 0, 0,
 465                 &max98927_dai_controls),
 466         SND_SOC_DAPM_OUTPUT("BE_OUT"),
 467 };
 468
 469 static DECLARE_TLV_DB_SCALE(max98927_spk_tlv, 300, 300, 0);
 470 static DECLARE_TLV_DB_SCALE(max98927_digital_tlv, -1600, 25, 0);
 471
 472 static bool max98927_readable_register(struct device *dev, unsigned int reg)
 473 {
 474         switch (reg) {
 475         case MAX98927_R0001_INT_RAW1 ... MAX98927_R0028_ICC_RX_EN_B:
 476         case MAX98927_R002B_ICC_TX_EN_A ... MAX98927_R002C_ICC_TX_EN_B:
 477         case MAX98927_R002E_ICC_HIZ_MANUAL_MODE
 478                 ... MAX98927_R004E_MEAS_ADC_CH2_READ:
 479         case MAX98927_R0051_BROWNOUT_STATUS
 480                 ... MAX98927_R0055_BROWNOUT_LVL_HOLD:
 481         case MAX98927_R005A_BROWNOUT_LVL1_THRESH
 482                 ... MAX98927_R0061_BROWNOUT_AMP1_CLIP_MODE:
 483         case MAX98927_R0072_BROWNOUT_LVL1_CUR_LIMIT
 484                 ... MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ:
 485         case MAX98927_R00FF_GLOBAL_SHDN:
 486         case MAX98927_R0100_SOFT_RESET:
 487         case MAX98927_R01FF_REV_ID:
 488                 return true;
 489         default:
 490                 return false;
 491         }
 492 };
 493
 494 static bool max98927_volatile_reg(struct device *dev, unsigned int reg)
 495 {
 496         switch (reg) {
 497         case MAX98927_R0001_INT_RAW1 ... MAX98927_R0009_INT_FLAG3:
 498                 return true;
 499         default:
 500                 return false;
 501         }
 502 }
 503
 504 static const char * const max98927_boost_voltage_text[] = {
 505         "6.5V", "6.625V", "6.75V", "6.875V", "7V", "7.125V", "7.25V", "7.375V",
 506         "7.5V", "7.625V", "7.75V", "7.875V", "8V", "8.125V", "8.25V", "8.375V",
 507         "8.5V", "8.625V", "8.75V", "8.875V", "9V", "9.125V", "9.25V", "9.375V",
 508         "9.5V", "9.625V", "9.75V", "9.875V", "10V"
 509 };
 510
 511 static SOC_ENUM_SINGLE_DECL(max98927_boost_voltage,
 512                 MAX98927_R0040_BOOST_CTRL0, 0,
 513                 max98927_boost_voltage_text);
 514
 515 static const char * const max98927_current_limit_text[] = {
 516         "1.00A", "1.10A", "1.20A", "1.30A", "1.40A", "1.50A", "1.60A", "1.70A",
 517         "1.80A", "1.90A", "2.00A", "2.10A", "2.20A", "2.30A", "2.40A", "2.50A",
 518         "2.60A", "2.70A", "2.80A", "2.90A", "3.00A", "3.10A", "3.20A", "3.30A",
 519         "3.40A", "3.50A", "3.60A", "3.70A", "3.80A", "3.90A", "4.00A", "4.10A"
 520 };
 521
 522 static SOC_ENUM_SINGLE_DECL(max98927_current_limit,
 523                 MAX98927_R0042_BOOST_CTRL1, 1,
 524                 max98927_current_limit_text);
 525
 526 static const struct snd_kcontrol_new max98927_snd_controls[] = {
 527         SOC_SINGLE_TLV("Speaker Volume", MAX98927_R003C_SPK_GAIN,
 528                 0, 6, 0,
 529                 max98927_spk_tlv),
 530         SOC_SINGLE_TLV("Digital Volume", MAX98927_R0036_AMP_VOL_CTRL,
 531                 0, (1<<MAX98927_AMP_VOL_WIDTH)-1, 0,
 532                 max98927_digital_tlv),
 533         SOC_SINGLE("Amp DSP Switch", MAX98927_R0052_BROWNOUT_EN,
 534                 MAX98927_BROWNOUT_DSP_SHIFT, 1, 0),
 535         SOC_SINGLE("Ramp Switch", MAX98927_R0037_AMP_DSP_CFG,
 536                 MAX98927_AMP_DSP_CFG_RMP_SHIFT, 1, 0),
 537         SOC_SINGLE("DRE Switch", MAX98927_R0039_DRE_CTRL,
 538                 MAX98927_DRE_EN_SHIFT, 1, 0),
 539         SOC_SINGLE("Volume Location Switch", MAX98927_R0036_AMP_VOL_CTRL,
 540                 MAX98927_AMP_VOL_SEL_SHIFT, 1, 0),
 541         SOC_ENUM("Boost Output Voltage", max98927_boost_voltage),
 542         SOC_ENUM("Current Limit", max98927_current_limit),
 543 };
 544
 545 static const struct snd_soc_dapm_route max98927_audio_map[] = {
 546         {"Amp Enable", NULL, "DAI_OUT"},
 547         {"DAI Sel Mux", "Left", "Amp Enable"},
 548         {"DAI Sel Mux", "Right", "Amp Enable"},
 549         {"DAI Sel Mux", "LeftRight", "Amp Enable"},
 550         {"BE_OUT", NULL, "DAI Sel Mux"},
 551 };
 552
 553 static struct snd_soc_dai_driver max98927_dai[] = {
 554         {
 555                 .name = "max98927-aif1",
 556                 .playback = {
 557                         .stream_name = "HiFi Playback",
 558                         .channels_min = 1,
 559                         .channels_max = 2,
 560                         .rates = MAX98927_RATES,
 561                         .formats = MAX98927_FORMATS,
 562                 },
 563                 .capture = {
 564                         .stream_name = "HiFi Capture",
 565                         .channels_min = 1,
 566                         .channels_max = 2,
 567                         .rates = MAX98927_RATES,
 568                         .formats = MAX98927_FORMATS,
 569                 },
 570                 .ops = &max98927_dai_ops,
 571         }
 572 };
 573
 574 static int max98927_probe(struct snd_soc_codec *codec)
 575 {
 576         struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
 577
 578         max98927->codec = codec;
 579         codec->control_data = max98927->regmap;
 580
 581         /* Software Reset */
 582         regmap_write(max98927->regmap,
 583                 MAX98927_R0100_SOFT_RESET, MAX98927_SOFT_RESET);
 584
 585         /* IV default slot configuration */
 586         regmap_write(max98927->regmap,
 587                 MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
 588                 0xFF);
 589         regmap_write(max98927->regmap,
 590                 MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
 591                 0xFF);
 592         regmap_write(max98927->regmap,
 593                 MAX98927_R0025_PCM_TO_SPK_MONOMIX_A,
 594                 0x80);
 595         regmap_write(max98927->regmap,
 596                 MAX98927_R0026_PCM_TO_SPK_MONOMIX_B,
 597                 0x1);
 598         /* Set inital volume (+13dB) */
 599         regmap_write(max98927->regmap,
 600                 MAX98927_R0036_AMP_VOL_CTRL,
 601                 0x38);
 602         regmap_write(max98927->regmap,
 603                 MAX98927_R003C_SPK_GAIN,
 604                 0x05);
 605         /* Enable DC blocker */
 606         regmap_write(max98927->regmap,
 607                 MAX98927_R0037_AMP_DSP_CFG,
 608                 0x03);
 609         /* Enable IMON VMON DC blocker */
 610         regmap_write(max98927->regmap,
 611                 MAX98927_R003F_MEAS_DSP_CFG,
 612                 0xF7);
 613         /* Boost Output Voltage & Current limit */
 614         regmap_write(max98927->regmap,
 615                 MAX98927_R0040_BOOST_CTRL0,
 616                 0x1C);
 617         regmap_write(max98927->regmap,
 618                 MAX98927_R0042_BOOST_CTRL1,
 619                 0x3E);
 620         /* Measurement ADC config */
 621         regmap_write(max98927->regmap,
 622                 MAX98927_R0043_MEAS_ADC_CFG,
 623                 0x04);
 624         regmap_write(max98927->regmap,
 625                 MAX98927_R0044_MEAS_ADC_BASE_MSB,
 626                 0x00);
 627         regmap_write(max98927->regmap,
 628                 MAX98927_R0045_MEAS_ADC_BASE_LSB,
 629                 0x24);
 630         /* Brownout Level */
 631         regmap_write(max98927->regmap,
 632                 MAX98927_R007F_BROWNOUT_LVL4_AMP1_CTRL1,
 633                 0x06);
 634         /* Envelope Tracking configuration */
 635         regmap_write(max98927->regmap,
 636                 MAX98927_R0082_ENV_TRACK_VOUT_HEADROOM,
 637                 0x08);
 638         regmap_write(max98927->regmap,
 639                 MAX98927_R0086_ENV_TRACK_CTRL,
 640                 0x01);
 641         regmap_write(max98927->regmap,
 642                 MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ,
 643                 0x10);
 644
 645         /* voltage, current slot configuration */
 646         regmap_write(max98927->regmap,
 647                 MAX98927_R001E_PCM_TX_CH_SRC_A,
 648                 (max98927->i_l_slot<<MAX98927_PCM_TX_CH_SRC_A_I_SHIFT|
 649                 max98927->v_l_slot)&0xFF);
 650
 651         if (max98927->v_l_slot < 8) {
 652                 regmap_update_bits(max98927->regmap,
 653                         MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
 654                         1 << max98927->v_l_slot, 0);
 655                 regmap_update_bits(max98927->regmap,
 656                         MAX98927_R001A_PCM_TX_EN_A,
 657                         1 << max98927->v_l_slot,
 658                         1 << max98927->v_l_slot);
 659         } else {
 660                 regmap_update_bits(max98927->regmap,
 661                         MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
 662                         1 << (max98927->v_l_slot - 8), 0);
 663                 regmap_update_bits(max98927->regmap,
 664                         MAX98927_R001B_PCM_TX_EN_B,
 665                         1 << (max98927->v_l_slot - 8),
 666                         1 << (max98927->v_l_slot - 8));
 667         }
 668
 669         if (max98927->i_l_slot < 8) {
 670                 regmap_update_bits(max98927->regmap,
 671                         MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
 672                         1 << max98927->i_l_slot, 0);
 673                 regmap_update_bits(max98927->regmap,
 674                         MAX98927_R001A_PCM_TX_EN_A,
 675                         1 << max98927->i_l_slot,
 676                         1 << max98927->i_l_slot);
 677         } else {
 678                 regmap_update_bits(max98927->regmap,
 679                         MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
 680                         1 << (max98927->i_l_slot - 8), 0);
 681                 regmap_update_bits(max98927->regmap,
 682                         MAX98927_R001B_PCM_TX_EN_B,
 683                         1 << (max98927->i_l_slot - 8),
 684                         1 << (max98927->i_l_slot - 8));
 685         }
 686
 687         /* Set interleave mode */
 688         if (max98927->interleave_mode)
 689                 regmap_update_bits(max98927->regmap,
 690                         MAX98927_R001F_PCM_TX_CH_SRC_B,
 691                         MAX98927_PCM_TX_CH_INTERLEAVE_MASK,
 692                         MAX98927_PCM_TX_CH_INTERLEAVE_MASK);
 693         return 0;
 694 }
 695
 696 static const struct snd_soc_codec_driver soc_codec_dev_max98927 = {
 697         .probe = max98927_probe,
 698         .component_driver = {
 699                 .controls = max98927_snd_controls,
 700                 .num_controls = ARRAY_SIZE(max98927_snd_controls),
 701                 .dapm_widgets = max98927_dapm_widgets,
 702                 .num_dapm_widgets = ARRAY_SIZE(max98927_dapm_widgets),
 703                 .dapm_routes = max98927_audio_map,
 704                 .num_dapm_routes = ARRAY_SIZE(max98927_audio_map),
 705         },
 706 };
 707
 708 static const struct regmap_config max98927_regmap = {
 709         .reg_bits         = 16,
 710         .val_bits         = 8,
 711         .max_register     = MAX98927_R01FF_REV_ID,
 712         .reg_defaults     = max98927_reg,
 713         .num_reg_defaults = ARRAY_SIZE(max98927_reg),
 714         .readable_reg     = max98927_readable_register,
 715         .volatile_reg     = max98927_volatile_reg,
 716         .cache_type       = REGCACHE_RBTREE,
 717 };
 718
 719 static void max98927_slot_config(struct i2c_client *i2c,
 720         struct max98927_priv *max98927)
 721 {
 722         int value;
 723
 724         if (!of_property_read_u32(i2c->dev.of_node,
 725                 "vmon-slot-no", &value))
 726                 max98927->v_l_slot = value & 0xF;
 727         else
 728                 max98927->v_l_slot = 0;
 729         if (!of_property_read_u32(i2c->dev.of_node,
 730                 "imon-slot-no", &value))
 731                 max98927->i_l_slot = value & 0xF;
 732         else
 733                 max98927->i_l_slot = 1;
 734 }
 735
 736 static int max98927_i2c_probe(struct i2c_client *i2c,
 737         const struct i2c_device_id *id)
 738 {
 739
 740         int ret = 0, value;
 741         int reg = 0;
 742         struct max98927_priv *max98927 = NULL;
 743
 744         max98927 = devm_kzalloc(&i2c->dev,
 745                 sizeof(*max98927), GFP_KERNEL);
 746
 747         if (!max98927) {
 748                 ret = -ENOMEM;
 749                 return ret;
 750         }
 751         i2c_set_clientdata(i2c, max98927);
 752
 753         /* update interleave mode info */
 754         if (!of_property_read_u32(i2c->dev.of_node,
 755                 "interleave_mode", &value)) {
 756                 if (value > 0)
 757                         max98927->interleave_mode = 1;
 758                 else
 759                         max98927->interleave_mode = 0;
 760         } else
 761                 max98927->interleave_mode = 0;
 762
 763         /* regmap initialization */
 764         max98927->regmap
 765                 = devm_regmap_init_i2c(i2c, &max98927_regmap);
 766         if (IS_ERR(max98927->regmap)) {
 767                 ret = PTR_ERR(max98927->regmap);
 768                 dev_err(&i2c->dev,
 769                         "Failed to allocate regmap: %d\n", ret);
 770                 return ret;
 771         }
 772
 773         /* Check Revision ID */
 774         ret = regmap_read(max98927->regmap,
 775                 MAX98927_R01FF_REV_ID, &reg);
 776         if (ret < 0) {
 777                 dev_err(&i2c->dev,
 778                         "Failed to read: 0x%02X\n", MAX98927_R01FF_REV_ID);
 779                 return ret;
 780         }
 781         dev_info(&i2c->dev, "MAX98927 revisionID: 0x%02X\n", reg);
 782
 783         /* voltage/current slot configuration */
 784         max98927_slot_config(i2c, max98927);
 785
 786         /* codec registeration */
 787         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_max98927,
 788                 max98927_dai, ARRAY_SIZE(max98927_dai));
 789         if (ret < 0)
 790                 dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
 791
 792         return ret;
 793 }
 794
 795 static int max98927_i2c_remove(struct i2c_client *client)
 796 {
 797         snd_soc_unregister_codec(&client->dev);
 798         return 0;
 799 }
 800
 801 static const struct i2c_device_id max98927_i2c_id[] = {
 802         { "max98927", 0},
 803         { },
 804 };
 805
 806 MODULE_DEVICE_TABLE(i2c, max98927_i2c_id);
 807
 808 #if defined(CONFIG_OF)
 809 static const struct of_device_id max98927_of_match[] = {
 810         { .compatible = "maxim,max98927", },
 811         { }
 812 };
 813 MODULE_DEVICE_TABLE(of, max98927_of_match);
 814 #endif
 815
 816 #ifdef CONFIG_ACPI
 817 static const struct acpi_device_id max98927_acpi_match[] = {
 818         { "MX98927", 0 },
 819         {},
 820 };
 821 MODULE_DEVICE_TABLE(acpi, max98927_acpi_match);
 822 #endif
 823
 824 static struct i2c_driver max98927_i2c_driver = {
 825         .driver = {
 826                 .name = "max98927",
 827                 .of_match_table = of_match_ptr(max98927_of_match),
 828                 .acpi_match_table = ACPI_PTR(max98927_acpi_match),
 829                 .pm = NULL,
 830         },
 831         .probe  = max98927_i2c_probe,
 832         .remove = max98927_i2c_remove,
 833         .id_table = max98927_i2c_id,
 834 };
 835
 836 module_i2c_driver(max98927_i2c_driver)
 837
 838 MODULE_DESCRIPTION("ALSA SoC MAX98927 driver");
 839 MODULE_AUTHOR("Ryan Lee <ryans.lee@maximintegrated.com>");
 840 MODULE_LICENSE("GPL");