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,  0x75},
  48         {MAX98927_R0015_MEAS_ADC_THERM_SHDN_THRESH,  0x8c},
  49         {MAX98927_R0016_MEAS_ADC_THERM_HYSTERESIS,  0x08},
  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,  0x04},
  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,  0x01},
  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\n");
 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\n");
 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\n",
 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                 regmap_update_bits(max98927->regmap,
 422                         MAX98927_R00FF_GLOBAL_SHDN,
 423                         MAX98927_GLOBAL_EN_MASK, 1);
 424                 break;
 425         case SND_SOC_DAPM_POST_PMD:
 426                 regmap_update_bits(max98927->regmap,
 427                         MAX98927_R00FF_GLOBAL_SHDN,
 428                         MAX98927_GLOBAL_EN_MASK, 0);
 429                 regmap_update_bits(max98927->regmap,
 430                         MAX98927_R003A_AMP_EN,
 431                         MAX98927_AMP_EN_MASK, 0);
 432                 break;
 433         default:
 434                 return 0;
 435         }
 436         return 0;
 437 }
 438
 439 static const char * const max98927_switch_text[] = {
 440         "Left", "Right", "LeftRight"};
 441
 442 static const struct soc_enum dai_sel_enum =
 443         SOC_ENUM_SINGLE(MAX98927_R0025_PCM_TO_SPK_MONOMIX_A,
 444                 MAX98927_PCM_TO_SPK_MONOMIX_CFG_SHIFT,
 445                 3, max98927_switch_text);
 446
 447 static const struct snd_kcontrol_new max98927_dai_controls =
 448         SOC_DAPM_ENUM("DAI Sel", dai_sel_enum);
 449
 450 static const struct snd_kcontrol_new max98927_vi_control =
 451         SOC_DAPM_SINGLE("Switch", MAX98927_R003F_MEAS_DSP_CFG, 2, 1, 0);
 452
 453 static const struct snd_soc_dapm_widget max98927_dapm_widgets[] = {
 454         SND_SOC_DAPM_DAC_E("Amp Enable", "HiFi Playback", MAX98927_R003A_AMP_EN,
 455                 0, 0, max98927_dac_event,
 456                 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 457         SND_SOC_DAPM_MUX("DAI Sel Mux", SND_SOC_NOPM, 0, 0,
 458                 &max98927_dai_controls),
 459         SND_SOC_DAPM_OUTPUT("BE_OUT"),
 460         SND_SOC_DAPM_AIF_OUT("Voltage Sense", "HiFi Capture",  0,
 461                 MAX98927_R003E_MEAS_EN, 0, 0),
 462         SND_SOC_DAPM_AIF_OUT("Current Sense", "HiFi Capture",  0,
 463                 MAX98927_R003E_MEAS_EN, 1, 0),
 464         SND_SOC_DAPM_SWITCH("VI Sense", SND_SOC_NOPM, 0, 0,
 465                 &max98927_vi_control),
 466         SND_SOC_DAPM_SIGGEN("VMON"),
 467         SND_SOC_DAPM_SIGGEN("IMON"),
 468 };
 469
 470 static DECLARE_TLV_DB_SCALE(max98927_spk_tlv, 300, 300, 0);
 471 static DECLARE_TLV_DB_SCALE(max98927_digital_tlv, -1600, 25, 0);
 472
 473 static bool max98927_readable_register(struct device *dev, unsigned int reg)
 474 {
 475         switch (reg) {
 476         case MAX98927_R0001_INT_RAW1 ... MAX98927_R0028_ICC_RX_EN_B:
 477         case MAX98927_R002B_ICC_TX_EN_A ... MAX98927_R002C_ICC_TX_EN_B:
 478         case MAX98927_R002E_ICC_HIZ_MANUAL_MODE
 479                 ... MAX98927_R004E_MEAS_ADC_CH2_READ:
 480         case MAX98927_R0051_BROWNOUT_STATUS
 481                 ... MAX98927_R0055_BROWNOUT_LVL_HOLD:
 482         case MAX98927_R005A_BROWNOUT_LVL1_THRESH
 483                 ... MAX98927_R0061_BROWNOUT_AMP1_CLIP_MODE:
 484         case MAX98927_R0072_BROWNOUT_LVL1_CUR_LIMIT
 485                 ... MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ:
 486         case MAX98927_R00FF_GLOBAL_SHDN:
 487         case MAX98927_R0100_SOFT_RESET:
 488         case MAX98927_R01FF_REV_ID:
 489                 return true;
 490         default:
 491                 return false;
 492         }
 493 };
 494
 495 static bool max98927_volatile_reg(struct device *dev, unsigned int reg)
 496 {
 497         switch (reg) {
 498         case MAX98927_R0001_INT_RAW1 ... MAX98927_R0009_INT_FLAG3:
 499         case MAX98927_R004C_MEAS_ADC_CH0_READ:
 500         case MAX98927_R004D_MEAS_ADC_CH1_READ:
 501         case MAX98927_R004E_MEAS_ADC_CH2_READ:
 502         case MAX98927_R0051_BROWNOUT_STATUS:
 503         case MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ:
 504         case MAX98927_R01FF_REV_ID:
 505         case MAX98927_R0100_SOFT_RESET:
 506                 return true;
 507         default:
 508                 return false;
 509         }
 510 }
 511
 512 static const char * const max98927_boost_voltage_text[] = {
 513         "6.5V", "6.625V", "6.75V", "6.875V", "7V", "7.125V", "7.25V", "7.375V",
 514         "7.5V", "7.625V", "7.75V", "7.875V", "8V", "8.125V", "8.25V", "8.375V",
 515         "8.5V", "8.625V", "8.75V", "8.875V", "9V", "9.125V", "9.25V", "9.375V",
 516         "9.5V", "9.625V", "9.75V", "9.875V", "10V"
 517 };
 518
 519 static SOC_ENUM_SINGLE_DECL(max98927_boost_voltage,
 520                 MAX98927_R0040_BOOST_CTRL0, 0,
 521                 max98927_boost_voltage_text);
 522
 523 static const char * const max98927_current_limit_text[] = {
 524         "1.00A", "1.10A", "1.20A", "1.30A", "1.40A", "1.50A", "1.60A", "1.70A",
 525         "1.80A", "1.90A", "2.00A", "2.10A", "2.20A", "2.30A", "2.40A", "2.50A",
 526         "2.60A", "2.70A", "2.80A", "2.90A", "3.00A", "3.10A", "3.20A", "3.30A",
 527         "3.40A", "3.50A", "3.60A", "3.70A", "3.80A", "3.90A", "4.00A", "4.10A"
 528 };
 529
 530 static SOC_ENUM_SINGLE_DECL(max98927_current_limit,
 531                 MAX98927_R0042_BOOST_CTRL1, 1,
 532                 max98927_current_limit_text);
 533
 534 static const struct snd_kcontrol_new max98927_snd_controls[] = {
 535         SOC_SINGLE_TLV("Speaker Volume", MAX98927_R003C_SPK_GAIN,
 536                 0, 6, 0,
 537                 max98927_spk_tlv),
 538         SOC_SINGLE_TLV("Digital Volume", MAX98927_R0036_AMP_VOL_CTRL,
 539                 0, (1<<MAX98927_AMP_VOL_WIDTH)-1, 0,
 540                 max98927_digital_tlv),
 541         SOC_SINGLE("Amp DSP Switch", MAX98927_R0052_BROWNOUT_EN,
 542                 MAX98927_BROWNOUT_DSP_SHIFT, 1, 0),
 543         SOC_SINGLE("Ramp Switch", MAX98927_R0037_AMP_DSP_CFG,
 544                 MAX98927_AMP_DSP_CFG_RMP_SHIFT, 1, 0),
 545         SOC_SINGLE("DRE Switch", MAX98927_R0039_DRE_CTRL,
 546                 MAX98927_DRE_EN_SHIFT, 1, 0),
 547         SOC_SINGLE("Volume Location Switch", MAX98927_R0036_AMP_VOL_CTRL,
 548                 MAX98927_AMP_VOL_SEL_SHIFT, 1, 0),
 549         SOC_ENUM("Boost Output Voltage", max98927_boost_voltage),
 550         SOC_ENUM("Current Limit", max98927_current_limit),
 551 };
 552
 553 static const struct snd_soc_dapm_route max98927_audio_map[] = {
 554         /* Plabyack */
 555         {"DAI Sel Mux", "Left", "Amp Enable"},
 556         {"DAI Sel Mux", "Right", "Amp Enable"},
 557         {"DAI Sel Mux", "LeftRight", "Amp Enable"},
 558         {"BE_OUT", NULL, "DAI Sel Mux"},
 559         /* Capture */
 560         { "VI Sense", "Switch", "VMON" },
 561         { "VI Sense", "Switch", "IMON" },
 562         { "Voltage Sense", NULL, "VI Sense" },
 563         { "Current Sense", NULL, "VI Sense" },
 564 };
 565
 566 static struct snd_soc_dai_driver max98927_dai[] = {
 567         {
 568                 .name = "max98927-aif1",
 569                 .playback = {
 570                         .stream_name = "HiFi Playback",
 571                         .channels_min = 1,
 572                         .channels_max = 2,
 573                         .rates = MAX98927_RATES,
 574                         .formats = MAX98927_FORMATS,
 575                 },
 576                 .capture = {
 577                         .stream_name = "HiFi Capture",
 578                         .channels_min = 1,
 579                         .channels_max = 2,
 580                         .rates = MAX98927_RATES,
 581                         .formats = MAX98927_FORMATS,
 582                 },
 583                 .ops = &max98927_dai_ops,
 584         }
 585 };
 586
 587 static int max98927_probe(struct snd_soc_codec *codec)
 588 {
 589         struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
 590
 591         max98927->codec = codec;
 592         codec->control_data = max98927->regmap;
 593
 594         /* Software Reset */
 595         regmap_write(max98927->regmap,
 596                 MAX98927_R0100_SOFT_RESET, MAX98927_SOFT_RESET);
 597
 598         /* IV default slot configuration */
 599         regmap_write(max98927->regmap,
 600                 MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
 601                 0xFF);
 602         regmap_write(max98927->regmap,
 603                 MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
 604                 0xFF);
 605         regmap_write(max98927->regmap,
 606                 MAX98927_R0025_PCM_TO_SPK_MONOMIX_A,
 607                 0x80);
 608         regmap_write(max98927->regmap,
 609                 MAX98927_R0026_PCM_TO_SPK_MONOMIX_B,
 610                 0x1);
 611         /* Set inital volume (+13dB) */
 612         regmap_write(max98927->regmap,
 613                 MAX98927_R0036_AMP_VOL_CTRL,
 614                 0x38);
 615         regmap_write(max98927->regmap,
 616                 MAX98927_R003C_SPK_GAIN,
 617                 0x05);
 618         /* Enable DC blocker */
 619         regmap_write(max98927->regmap,
 620                 MAX98927_R0037_AMP_DSP_CFG,
 621                 0x03);
 622         /* Enable IMON VMON DC blocker */
 623         regmap_write(max98927->regmap,
 624                 MAX98927_R003F_MEAS_DSP_CFG,
 625                 0xF7);
 626         /* Boost Output Voltage & Current limit */
 627         regmap_write(max98927->regmap,
 628                 MAX98927_R0040_BOOST_CTRL0,
 629                 0x1C);
 630         regmap_write(max98927->regmap,
 631                 MAX98927_R0042_BOOST_CTRL1,
 632                 0x3E);
 633         /* Measurement ADC config */
 634         regmap_write(max98927->regmap,
 635                 MAX98927_R0043_MEAS_ADC_CFG,
 636                 0x04);
 637         regmap_write(max98927->regmap,
 638                 MAX98927_R0044_MEAS_ADC_BASE_MSB,
 639                 0x00);
 640         regmap_write(max98927->regmap,
 641                 MAX98927_R0045_MEAS_ADC_BASE_LSB,
 642                 0x24);
 643         /* Brownout Level */
 644         regmap_write(max98927->regmap,
 645                 MAX98927_R007F_BROWNOUT_LVL4_AMP1_CTRL1,
 646                 0x06);
 647         /* Envelope Tracking configuration */
 648         regmap_write(max98927->regmap,
 649                 MAX98927_R0082_ENV_TRACK_VOUT_HEADROOM,
 650                 0x08);
 651         regmap_write(max98927->regmap,
 652                 MAX98927_R0086_ENV_TRACK_CTRL,
 653                 0x01);
 654         regmap_write(max98927->regmap,
 655                 MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ,
 656                 0x10);
 657
 658         /* voltage, current slot configuration */
 659         regmap_write(max98927->regmap,
 660                 MAX98927_R001E_PCM_TX_CH_SRC_A,
 661                 (max98927->i_l_slot<<MAX98927_PCM_TX_CH_SRC_A_I_SHIFT|
 662                 max98927->v_l_slot)&0xFF);
 663
 664         if (max98927->v_l_slot < 8) {
 665                 regmap_update_bits(max98927->regmap,
 666                         MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
 667                         1 << max98927->v_l_slot, 0);
 668                 regmap_update_bits(max98927->regmap,
 669                         MAX98927_R001A_PCM_TX_EN_A,
 670                         1 << max98927->v_l_slot,
 671                         1 << max98927->v_l_slot);
 672         } else {
 673                 regmap_update_bits(max98927->regmap,
 674                         MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
 675                         1 << (max98927->v_l_slot - 8), 0);
 676                 regmap_update_bits(max98927->regmap,
 677                         MAX98927_R001B_PCM_TX_EN_B,
 678                         1 << (max98927->v_l_slot - 8),
 679                         1 << (max98927->v_l_slot - 8));
 680         }
 681
 682         if (max98927->i_l_slot < 8) {
 683                 regmap_update_bits(max98927->regmap,
 684                         MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
 685                         1 << max98927->i_l_slot, 0);
 686                 regmap_update_bits(max98927->regmap,
 687                         MAX98927_R001A_PCM_TX_EN_A,
 688                         1 << max98927->i_l_slot,
 689                         1 << max98927->i_l_slot);
 690         } else {
 691                 regmap_update_bits(max98927->regmap,
 692                         MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
 693                         1 << (max98927->i_l_slot - 8), 0);
 694                 regmap_update_bits(max98927->regmap,
 695                         MAX98927_R001B_PCM_TX_EN_B,
 696                         1 << (max98927->i_l_slot - 8),
 697                         1 << (max98927->i_l_slot - 8));
 698         }
 699
 700         /* Set interleave mode */
 701         if (max98927->interleave_mode)
 702                 regmap_update_bits(max98927->regmap,
 703                         MAX98927_R001F_PCM_TX_CH_SRC_B,
 704                         MAX98927_PCM_TX_CH_INTERLEAVE_MASK,
 705                         MAX98927_PCM_TX_CH_INTERLEAVE_MASK);
 706         return 0;
 707 }
 708
 709 #ifdef CONFIG_PM_SLEEP
 710 static int max98927_suspend(struct device *dev)
 711 {
 712         struct max98927_priv *max98927 = dev_get_drvdata(dev);
 713
 714         regcache_cache_only(max98927->regmap, true);
 715         regcache_mark_dirty(max98927->regmap);
 716         return 0;
 717 }
 718 static int max98927_resume(struct device *dev)
 719 {
 720         struct max98927_priv *max98927 = dev_get_drvdata(dev);
 721
 722         regmap_write(max98927->regmap,
 723                 MAX98927_R0100_SOFT_RESET, MAX98927_SOFT_RESET);
 724         regcache_cache_only(max98927->regmap, false);
 725         regcache_sync(max98927->regmap);
 726         return 0;
 727 }
 728 #endif
 729
 730 static const struct dev_pm_ops max98927_pm = {
 731         SET_SYSTEM_SLEEP_PM_OPS(max98927_suspend, max98927_resume)
 732 };
 733
 734 static const struct snd_soc_codec_driver soc_codec_dev_max98927 = {
 735         .probe = max98927_probe,
 736         .component_driver = {
 737                 .controls = max98927_snd_controls,
 738                 .num_controls = ARRAY_SIZE(max98927_snd_controls),
 739                 .dapm_widgets = max98927_dapm_widgets,
 740                 .num_dapm_widgets = ARRAY_SIZE(max98927_dapm_widgets),
 741                 .dapm_routes = max98927_audio_map,
 742                 .num_dapm_routes = ARRAY_SIZE(max98927_audio_map),
 743         },
 744 };
 745
 746 static const struct regmap_config max98927_regmap = {
 747         .reg_bits         = 16,
 748         .val_bits         = 8,
 749         .max_register     = MAX98927_R01FF_REV_ID,
 750         .reg_defaults     = max98927_reg,
 751         .num_reg_defaults = ARRAY_SIZE(max98927_reg),
 752         .readable_reg     = max98927_readable_register,
 753         .volatile_reg     = max98927_volatile_reg,
 754         .cache_type       = REGCACHE_RBTREE,
 755 };
 756
 757 static void max98927_slot_config(struct i2c_client *i2c,
 758         struct max98927_priv *max98927)
 759 {
 760         int value;
 761         struct device *dev = &i2c->dev;
 762
 763         if (!device_property_read_u32(dev, "vmon-slot-no", &value))
 764                 max98927->v_l_slot = value & 0xF;
 765         else
 766                 max98927->v_l_slot = 0;
 767
 768         if (!device_property_read_u32(dev, "imon-slot-no", &value))
 769                 max98927->i_l_slot = value & 0xF;
 770         else
 771                 max98927->i_l_slot = 1;
 772 }
 773
 774 static int max98927_i2c_probe(struct i2c_client *i2c,
 775         const struct i2c_device_id *id)
 776 {
 777
 778         int ret = 0, value;
 779         int reg = 0;
 780         struct max98927_priv *max98927 = NULL;
 781
 782         max98927 = devm_kzalloc(&i2c->dev,
 783                 sizeof(*max98927), GFP_KERNEL);
 784
 785         if (!max98927) {
 786                 ret = -ENOMEM;
 787                 return ret;
 788         }
 789         i2c_set_clientdata(i2c, max98927);
 790
 791         /* update interleave mode info */
 792         if (!of_property_read_u32(i2c->dev.of_node,
 793                 "interleave_mode", &value)) {
 794                 if (value > 0)
 795                         max98927->interleave_mode = 1;
 796                 else
 797                         max98927->interleave_mode = 0;
 798         } else
 799                 max98927->interleave_mode = 0;
 800
 801         /* regmap initialization */
 802         max98927->regmap
 803                 = devm_regmap_init_i2c(i2c, &max98927_regmap);
 804         if (IS_ERR(max98927->regmap)) {
 805                 ret = PTR_ERR(max98927->regmap);
 806                 dev_err(&i2c->dev,
 807                         "Failed to allocate regmap: %d\n", ret);
 808                 return ret;
 809         }
 810
 811         /* Check Revision ID */
 812         ret = regmap_read(max98927->regmap,
 813                 MAX98927_R01FF_REV_ID, &reg);
 814         if (ret < 0) {
 815                 dev_err(&i2c->dev,
 816                         "Failed to read: 0x%02X\n", MAX98927_R01FF_REV_ID);
 817                 return ret;
 818         }
 819         dev_info(&i2c->dev, "MAX98927 revisionID: 0x%02X\n", reg);
 820
 821         /* voltage/current slot configuration */
 822         max98927_slot_config(i2c, max98927);
 823
 824         /* codec registeration */
 825         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_max98927,
 826                 max98927_dai, ARRAY_SIZE(max98927_dai));
 827         if (ret < 0)
 828                 dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
 829
 830         return ret;
 831 }
 832
 833 static int max98927_i2c_remove(struct i2c_client *client)
 834 {
 835         snd_soc_unregister_codec(&client->dev);
 836         return 0;
 837 }
 838
 839 static const struct i2c_device_id max98927_i2c_id[] = {
 840         { "max98927", 0},
 841         { },
 842 };
 843
 844 MODULE_DEVICE_TABLE(i2c, max98927_i2c_id);
 845
 846 #if defined(CONFIG_OF)
 847 static const struct of_device_id max98927_of_match[] = {
 848         { .compatible = "maxim,max98927", },
 849         { }
 850 };
 851 MODULE_DEVICE_TABLE(of, max98927_of_match);
 852 #endif
 853
 854 #ifdef CONFIG_ACPI
 855 static const struct acpi_device_id max98927_acpi_match[] = {
 856         { "MX98927", 0 },
 857         {},
 858 };
 859 MODULE_DEVICE_TABLE(acpi, max98927_acpi_match);
 860 #endif
 861
 862 static struct i2c_driver max98927_i2c_driver = {
 863         .driver = {
 864                 .name = "max98927",
 865                 .of_match_table = of_match_ptr(max98927_of_match),
 866                 .acpi_match_table = ACPI_PTR(max98927_acpi_match),
 867                 .pm = &max98927_pm,
 868         },
 869         .probe  = max98927_i2c_probe,
 870         .remove = max98927_i2c_remove,
 871         .id_table = max98927_i2c_id,
 872 };
 873
 874 module_i2c_driver(max98927_i2c_driver)
 875
 876 MODULE_DESCRIPTION("ALSA SoC MAX98927 driver");
 877 MODULE_AUTHOR("Ryan Lee <ryans.lee@maximintegrated.com>");
 878 MODULE_LICENSE("GPL");