/*
* max98927.c -- MAX98927 ALSA Soc Audio driver
*
* Copyright (C) 2016 Maxim Integrated Products
* Author: Ryan Lee <ryans.lee@maximintegrated.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/cdev.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <sound/tlv.h>
#include "max98927.h"
static struct reg_default max98927_reg[] = {
{MAX98927_R0001_INT_RAW1, 0x00},
{MAX98927_R0002_INT_RAW2, 0x00},
{MAX98927_R0003_INT_RAW3, 0x00},
{MAX98927_R0004_INT_STATE1, 0x00},
{MAX98927_R0005_INT_STATE2, 0x00},
{MAX98927_R0006_INT_STATE3, 0x00},
{MAX98927_R0007_INT_FLAG1, 0x00},
{MAX98927_R0008_INT_FLAG2, 0x00},
{MAX98927_R0009_INT_FLAG3, 0x00},
{MAX98927_R000A_INT_EN1, 0x00},
{MAX98927_R000B_INT_EN2, 0x00},
{MAX98927_R000C_INT_EN3, 0x00},
{MAX98927_R000D_INT_FLAG_CLR1, 0x00},
{MAX98927_R000E_INT_FLAG_CLR2, 0x00},
{MAX98927_R000F_INT_FLAG_CLR3, 0x00},
{MAX98927_R0010_IRQ_CTRL, 0x00},
{MAX98927_R0011_CLK_MON, 0x00},
{MAX98927_R0012_WDOG_CTRL, 0x00},
{MAX98927_R0013_WDOG_RST, 0x00},
{MAX98927_R0014_MEAS_ADC_THERM_WARN_THRESH, 0x00},
{MAX98927_R0015_MEAS_ADC_THERM_SHDN_THRESH, 0x00},
{MAX98927_R0016_MEAS_ADC_THERM_HYSTERESIS, 0x00},
{MAX98927_R0017_PIN_CFG, 0x55},
{MAX98927_R0018_PCM_RX_EN_A, 0x00},
{MAX98927_R0019_PCM_RX_EN_B, 0x00},
{MAX98927_R001A_PCM_TX_EN_A, 0x00},
{MAX98927_R001B_PCM_TX_EN_B, 0x00},
{MAX98927_R001C_PCM_TX_HIZ_CTRL_A, 0x00},
{MAX98927_R001D_PCM_TX_HIZ_CTRL_B, 0x00},
{MAX98927_R001E_PCM_TX_CH_SRC_A, 0x00},
{MAX98927_R001F_PCM_TX_CH_SRC_B, 0x00},
{MAX98927_R0020_PCM_MODE_CFG, 0x40},
{MAX98927_R0021_PCM_MASTER_MODE, 0x00},
{MAX98927_R0022_PCM_CLK_SETUP, 0x22},
{MAX98927_R0023_PCM_SR_SETUP1, 0x00},
{MAX98927_R0024_PCM_SR_SETUP2, 0x00},
{MAX98927_R0025_PCM_TO_SPK_MONOMIX_A, 0x00},
{MAX98927_R0026_PCM_TO_SPK_MONOMIX_B, 0x00},
{MAX98927_R0027_ICC_RX_EN_A, 0x00},
{MAX98927_R0028_ICC_RX_EN_B, 0x00},
{MAX98927_R002B_ICC_TX_EN_A, 0x00},
{MAX98927_R002C_ICC_TX_EN_B, 0x00},
{MAX98927_R002E_ICC_HIZ_MANUAL_MODE, 0x00},
{MAX98927_R002F_ICC_TX_HIZ_EN_A, 0x00},
{MAX98927_R0030_ICC_TX_HIZ_EN_B, 0x00},
{MAX98927_R0031_ICC_LNK_EN, 0x00},
{MAX98927_R0032_PDM_TX_EN, 0x00},
{MAX98927_R0033_PDM_TX_HIZ_CTRL, 0x00},
{MAX98927_R0034_PDM_TX_CTRL, 0x00},
{MAX98927_R0035_PDM_RX_CTRL, 0x00},
{MAX98927_R0036_AMP_VOL_CTRL, 0x00},
{MAX98927_R0037_AMP_DSP_CFG, 0x02},
{MAX98927_R0038_TONE_GEN_DC_CFG, 0x00},
{MAX98927_R0039_DRE_CTRL, 0x01},
{MAX98927_R003A_AMP_EN, 0x00},
{MAX98927_R003B_SPK_SRC_SEL, 0x00},
{MAX98927_R003C_SPK_GAIN, 0x00},
{MAX98927_R003D_SSM_CFG, 0x01},
{MAX98927_R003E_MEAS_EN, 0x00},
{MAX98927_R003F_MEAS_DSP_CFG, 0x04},
{MAX98927_R0040_BOOST_CTRL0, 0x00},
{MAX98927_R0041_BOOST_CTRL3, 0x00},
{MAX98927_R0042_BOOST_CTRL1, 0x00},
{MAX98927_R0043_MEAS_ADC_CFG, 0x00},
{MAX98927_R0044_MEAS_ADC_BASE_MSB, 0x00},
{MAX98927_R0045_MEAS_ADC_BASE_LSB, 0x00},
{MAX98927_R0046_ADC_CH0_DIVIDE, 0x00},
{MAX98927_R0047_ADC_CH1_DIVIDE, 0x00},
{MAX98927_R0048_ADC_CH2_DIVIDE, 0x00},
{MAX98927_R0049_ADC_CH0_FILT_CFG, 0x00},
{MAX98927_R004A_ADC_CH1_FILT_CFG, 0x00},
{MAX98927_R004B_ADC_CH2_FILT_CFG, 0x00},
{MAX98927_R004C_MEAS_ADC_CH0_READ, 0x00},
{MAX98927_R004D_MEAS_ADC_CH1_READ, 0x00},
{MAX98927_R004E_MEAS_ADC_CH2_READ, 0x00},
{MAX98927_R0051_BROWNOUT_STATUS, 0x00},
{MAX98927_R0052_BROWNOUT_EN, 0x00},
{MAX98927_R0053_BROWNOUT_INFINITE_HOLD, 0x00},
{MAX98927_R0054_BROWNOUT_INFINITE_HOLD_CLR, 0x00},
{MAX98927_R0055_BROWNOUT_LVL_HOLD, 0x00},
{MAX98927_R005A_BROWNOUT_LVL1_THRESH, 0x00},
{MAX98927_R005B_BROWNOUT_LVL2_THRESH, 0x00},
{MAX98927_R005C_BROWNOUT_LVL3_THRESH, 0x00},
{MAX98927_R005D_BROWNOUT_LVL4_THRESH, 0x00},
{MAX98927_R005E_BROWNOUT_THRESH_HYSTERYSIS, 0x00},
{MAX98927_R005F_BROWNOUT_AMP_LIMITER_ATK_REL, 0x00},
{MAX98927_R0060_BROWNOUT_AMP_GAIN_ATK_REL, 0x00},
{MAX98927_R0061_BROWNOUT_AMP1_CLIP_MODE, 0x00},
{MAX98927_R0072_BROWNOUT_LVL1_CUR_LIMIT, 0x00},
{MAX98927_R0073_BROWNOUT_LVL1_AMP1_CTRL1, 0x00},
{MAX98927_R0074_BROWNOUT_LVL1_AMP1_CTRL2, 0x00},
{MAX98927_R0075_BROWNOUT_LVL1_AMP1_CTRL3, 0x00},
{MAX98927_R0076_BROWNOUT_LVL2_CUR_LIMIT, 0x00},
{MAX98927_R0077_BROWNOUT_LVL2_AMP1_CTRL1, 0x00},
{MAX98927_R0078_BROWNOUT_LVL2_AMP1_CTRL2, 0x00},
{MAX98927_R0079_BROWNOUT_LVL2_AMP1_CTRL3, 0x00},
{MAX98927_R007A_BROWNOUT_LVL3_CUR_LIMIT, 0x00},
{MAX98927_R007B_BROWNOUT_LVL3_AMP1_CTRL1, 0x00},
{MAX98927_R007C_BROWNOUT_LVL3_AMP1_CTRL2, 0x00},
{MAX98927_R007D_BROWNOUT_LVL3_AMP1_CTRL3, 0x00},
{MAX98927_R007E_BROWNOUT_LVL4_CUR_LIMIT, 0x00},
{MAX98927_R007F_BROWNOUT_LVL4_AMP1_CTRL1, 0x00},
{MAX98927_R0080_BROWNOUT_LVL4_AMP1_CTRL2, 0x00},
{MAX98927_R0081_BROWNOUT_LVL4_AMP1_CTRL3, 0x00},
{MAX98927_R0082_ENV_TRACK_VOUT_HEADROOM, 0x00},
{MAX98927_R0083_ENV_TRACK_BOOST_VOUT_DELAY, 0x00},
{MAX98927_R0084_ENV_TRACK_REL_RATE, 0x00},
{MAX98927_R0085_ENV_TRACK_HOLD_RATE, 0x00},
{MAX98927_R0086_ENV_TRACK_CTRL, 0x00},
{MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ, 0x00},
{MAX98927_R00FF_GLOBAL_SHDN, 0x00},
{MAX98927_R0100_SOFT_RESET, 0x00},
{MAX98927_R01FF_REV_ID, 0x40},
};
static int max98927_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
unsigned int mode = 0;
unsigned int format = 0;
unsigned int invert = 0;
dev_dbg(codec->dev, "%s: fmt 0x%08X\n", __func__, fmt);
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
mode = MAX98927_PCM_MASTER_MODE_SLAVE;
break;
case SND_SOC_DAIFMT_CBM_CFM:
max98927->master = true;
mode = MAX98927_PCM_MASTER_MODE_MASTER;
break;
default:
dev_err(codec->dev, "DAI clock mode unsupported");
return -EINVAL;
}
regmap_update_bits(max98927->regmap,
MAX98927_R0021_PCM_MASTER_MODE,
MAX98927_PCM_MASTER_MODE_MASK,
mode);
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_NF:
invert = MAX98927_PCM_MODE_CFG_PCM_BCLKEDGE;
break;
default:
dev_err(codec->dev, "DAI invert mode unsupported");
return -EINVAL;
}
regmap_update_bits(max98927->regmap,
MAX98927_R0020_PCM_MODE_CFG,
MAX98927_PCM_MODE_CFG_PCM_BCLKEDGE,
invert);
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
max98927->iface |= SND_SOC_DAIFMT_I2S;
format = MAX98927_PCM_FORMAT_I2S;
break;
case SND_SOC_DAIFMT_LEFT_J:
max98927->iface |= SND_SOC_DAIFMT_LEFT_J;
format = MAX98927_PCM_FORMAT_LJ;
break;
case SND_SOC_DAIFMT_PDM:
max98927->iface |= SND_SOC_DAIFMT_PDM;
break;
default:
return -EINVAL;
}
/* pcm channel configuration */
if (max98927->iface & (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_LEFT_J)) {
regmap_update_bits(max98927->regmap,
MAX98927_R0018_PCM_RX_EN_A,
MAX98927_PCM_RX_CH0_EN | MAX98927_PCM_RX_CH1_EN,
MAX98927_PCM_RX_CH0_EN | MAX98927_PCM_RX_CH1_EN);
regmap_update_bits(max98927->regmap,
MAX98927_R0020_PCM_MODE_CFG,
MAX98927_PCM_MODE_CFG_FORMAT_MASK,
format << MAX98927_PCM_MODE_CFG_FORMAT_SHIFT);
regmap_update_bits(max98927->regmap,
MAX98927_R003B_SPK_SRC_SEL,
MAX98927_SPK_SRC_MASK, 0);
} else
regmap_update_bits(max98927->regmap,
MAX98927_R0018_PCM_RX_EN_A,
MAX98927_PCM_RX_CH0_EN | MAX98927_PCM_RX_CH1_EN, 0);
/* pdm channel configuration */
if (max98927->iface & SND_SOC_DAIFMT_PDM) {
regmap_update_bits(max98927->regmap,
MAX98927_R0035_PDM_RX_CTRL,
MAX98927_PDM_RX_EN_MASK, 1);
regmap_update_bits(max98927->regmap,
MAX98927_R003B_SPK_SRC_SEL,
MAX98927_SPK_SRC_MASK, 3);
} else
regmap_update_bits(max98927->regmap,
MAX98927_R0035_PDM_RX_CTRL,
MAX98927_PDM_RX_EN_MASK, 0);
return 0;
}
/* codec MCLK rate in master mode */
static const int rate_table[] = {
5644800, 6000000, 6144000, 6500000,
9600000, 11289600, 12000000, 12288000,
13000000, 19200000,
};
static int max98927_set_clock(struct max98927_priv *max98927,
struct snd_pcm_hw_params *params)
{
struct snd_soc_codec *codec = max98927->codec;
/* BCLK/LRCLK ratio calculation */
int blr_clk_ratio = params_channels(params) * max98927->ch_size;
int value;
if (max98927->master) {
int i;
/* match rate to closest value */
for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
if (rate_table[i] >= max98927->sysclk)
break;
}
if (i == ARRAY_SIZE(rate_table)) {
dev_err(codec->dev, "failed to find proper clock rate.\n");
return -EINVAL;
}
regmap_update_bits(max98927->regmap,
MAX98927_R0021_PCM_MASTER_MODE,
MAX98927_PCM_MASTER_MODE_MCLK_MASK,
i << MAX98927_PCM_MASTER_MODE_MCLK_RATE_SHIFT);
}
switch (blr_clk_ratio) {
case 32:
value = 2;
break;
case 48:
value = 3;
break;
case 64:
value = 4;
break;
default:
return -EINVAL;
}
regmap_update_bits(max98927->regmap,
MAX98927_R0022_PCM_CLK_SETUP,
MAX98927_PCM_CLK_SETUP_BSEL_MASK,
value);
return 0;
}
static int max98927_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
unsigned int sampling_rate = 0;
unsigned int chan_sz = 0;
/* pcm mode configuration */
switch (snd_pcm_format_width(params_format(params))) {
case 16:
chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_16;
break;
case 24:
chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_24;
break;
case 32:
chan_sz = MAX98927_PCM_MODE_CFG_CHANSZ_32;
break;
default:
dev_err(codec->dev, "format unsupported %d",
params_format(params));
goto err;
}
max98927->ch_size = snd_pcm_format_width(params_format(params));
regmap_update_bits(max98927->regmap,
MAX98927_R0020_PCM_MODE_CFG,
MAX98927_PCM_MODE_CFG_CHANSZ_MASK, chan_sz);
dev_dbg(codec->dev, "format supported %d",
params_format(params));
/* sampling rate configuration */
switch (params_rate(params)) {
case 8000:
sampling_rate = MAX98927_PCM_SR_SET1_SR_8000;
break;
case 11025:
sampling_rate = MAX98927_PCM_SR_SET1_SR_11025;
break;
case 12000:
sampling_rate = MAX98927_PCM_SR_SET1_SR_12000;
break;
case 16000:
sampling_rate = MAX98927_PCM_SR_SET1_SR_16000;
break;
case 22050:
sampling_rate = MAX98927_PCM_SR_SET1_SR_22050;
break;
case 24000:
sampling_rate = MAX98927_PCM_SR_SET1_SR_24000;
break;
case 32000:
sampling_rate = MAX98927_PCM_SR_SET1_SR_32000;
break;
case 44100:
sampling_rate = MAX98927_PCM_SR_SET1_SR_44100;
break;
case 48000:
sampling_rate = MAX98927_PCM_SR_SET1_SR_48000;
break;
default:
dev_err(codec->dev, "rate %d not supported\n",
params_rate(params));
goto err;
}
/* set DAI_SR to correct LRCLK frequency */
regmap_update_bits(max98927->regmap,
MAX98927_R0023_PCM_SR_SETUP1,
MAX98927_PCM_SR_SET1_SR_MASK,
sampling_rate);
regmap_update_bits(max98927->regmap,
MAX98927_R0024_PCM_SR_SETUP2,
MAX98927_PCM_SR_SET2_SR_MASK,
sampling_rate << MAX98927_PCM_SR_SET2_SR_SHIFT);
/* set sampling rate of IV */
if (max98927->interleave_mode &&
sampling_rate > MAX98927_PCM_SR_SET1_SR_16000)
regmap_update_bits(max98927->regmap,
MAX98927_R0024_PCM_SR_SETUP2,
MAX98927_PCM_SR_SET2_IVADC_SR_MASK,
sampling_rate - 3);
else
regmap_update_bits(max98927->regmap,
MAX98927_R0024_PCM_SR_SETUP2,
MAX98927_PCM_SR_SET2_IVADC_SR_MASK,
sampling_rate);
return max98927_set_clock(max98927, params);
err:
return -EINVAL;
}
#define MAX98927_RATES SNDRV_PCM_RATE_8000_48000
#define MAX98927_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static int max98927_dai_set_sysclk(struct snd_soc_dai *dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = dai->codec;
struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
max98927->sysclk = freq;
return 0;
}
static const struct snd_soc_dai_ops max98927_dai_ops = {
.set_sysclk = max98927_dai_set_sysclk,
.set_fmt = max98927_dai_set_fmt,
.hw_params = max98927_dai_hw_params,
};
static int max98927_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
switch (event) {
case SND_SOC_DAPM_POST_PMU:
regmap_update_bits(max98927->regmap,
MAX98927_R003A_AMP_EN,
MAX98927_AMP_EN_MASK, 1);
/* enable VMON and IMON */
regmap_update_bits(max98927->regmap,
MAX98927_R003E_MEAS_EN,
MAX98927_MEAS_V_EN | MAX98927_MEAS_I_EN,
MAX98927_MEAS_V_EN | MAX98927_MEAS_I_EN);
regmap_update_bits(max98927->regmap,
MAX98927_R00FF_GLOBAL_SHDN,
MAX98927_GLOBAL_EN_MASK, 1);
break;
case SND_SOC_DAPM_POST_PMD:
regmap_update_bits(max98927->regmap,
MAX98927_R00FF_GLOBAL_SHDN,
MAX98927_GLOBAL_EN_MASK, 0);
regmap_update_bits(max98927->regmap,
MAX98927_R003A_AMP_EN,
MAX98927_AMP_EN_MASK, 0);
/* disable VMON and IMON */
regmap_update_bits(max98927->regmap,
MAX98927_R003E_MEAS_EN,
MAX98927_MEAS_V_EN | MAX98927_MEAS_I_EN, 0);
break;
default:
return 0;
}
return 0;
}
static const char * const max98927_switch_text[] = {
"Left", "Right", "LeftRight"};
static const struct soc_enum dai_sel_enum =
SOC_ENUM_SINGLE(MAX98927_R0025_PCM_TO_SPK_MONOMIX_A,
MAX98927_PCM_TO_SPK_MONOMIX_CFG_SHIFT,
3, max98927_switch_text);
static const struct snd_kcontrol_new max98927_dai_controls =
SOC_DAPM_ENUM("DAI Sel", dai_sel_enum);
static const struct snd_soc_dapm_widget max98927_dapm_widgets[] = {
SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC_E("Amp Enable", "HiFi Playback", MAX98927_R003A_AMP_EN,
0, 0, max98927_dac_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_MUX("DAI Sel Mux", SND_SOC_NOPM, 0, 0,
&max98927_dai_controls),
SND_SOC_DAPM_OUTPUT("BE_OUT"),
};
static DECLARE_TLV_DB_SCALE(max98927_spk_tlv, 300, 300, 0);
static DECLARE_TLV_DB_SCALE(max98927_digital_tlv, -1600, 25, 0);
static bool max98927_readable_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX98927_R0001_INT_RAW1 ... MAX98927_R0028_ICC_RX_EN_B:
case MAX98927_R002B_ICC_TX_EN_A ... MAX98927_R002C_ICC_TX_EN_B:
case MAX98927_R002E_ICC_HIZ_MANUAL_MODE
... MAX98927_R004E_MEAS_ADC_CH2_READ:
case MAX98927_R0051_BROWNOUT_STATUS
... MAX98927_R0055_BROWNOUT_LVL_HOLD:
case MAX98927_R005A_BROWNOUT_LVL1_THRESH
... MAX98927_R0061_BROWNOUT_AMP1_CLIP_MODE:
case MAX98927_R0072_BROWNOUT_LVL1_CUR_LIMIT
... MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ:
case MAX98927_R00FF_GLOBAL_SHDN:
case MAX98927_R0100_SOFT_RESET:
case MAX98927_R01FF_REV_ID:
return true;
default:
return false;
}
};
static bool max98927_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX98927_R0001_INT_RAW1 ... MAX98927_R0009_INT_FLAG3:
case MAX98927_R004C_MEAS_ADC_CH0_READ:
case MAX98927_R004D_MEAS_ADC_CH1_READ:
case MAX98927_R004E_MEAS_ADC_CH2_READ:
case MAX98927_R0051_BROWNOUT_STATUS:
case MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ:
case MAX98927_R01FF_REV_ID:
case MAX98927_R0100_SOFT_RESET:
return true;
default:
return false;
}
}
static const char * const max98927_boost_voltage_text[] = {
"6.5V", "6.625V", "6.75V", "6.875V", "7V", "7.125V", "7.25V", "7.375V",
"7.5V", "7.625V", "7.75V", "7.875V", "8V", "8.125V", "8.25V", "8.375V",
"8.5V", "8.625V", "8.75V", "8.875V", "9V", "9.125V", "9.25V", "9.375V",
"9.5V", "9.625V", "9.75V", "9.875V", "10V"
};
static SOC_ENUM_SINGLE_DECL(max98927_boost_voltage,
MAX98927_R0040_BOOST_CTRL0, 0,
max98927_boost_voltage_text);
static const char * const max98927_current_limit_text[] = {
"1.00A", "1.10A", "1.20A", "1.30A", "1.40A", "1.50A", "1.60A", "1.70A",
"1.80A", "1.90A", "2.00A", "2.10A", "2.20A", "2.30A", "2.40A", "2.50A",
"2.60A", "2.70A", "2.80A", "2.90A", "3.00A", "3.10A", "3.20A", "3.30A",
"3.40A", "3.50A", "3.60A", "3.70A", "3.80A", "3.90A", "4.00A", "4.10A"
};
static SOC_ENUM_SINGLE_DECL(max98927_current_limit,
MAX98927_R0042_BOOST_CTRL1, 1,
max98927_current_limit_text);
static const struct snd_kcontrol_new max98927_snd_controls[] = {
SOC_SINGLE_TLV("Speaker Volume", MAX98927_R003C_SPK_GAIN,
0, 6, 0,
max98927_spk_tlv),
SOC_SINGLE_TLV("Digital Volume", MAX98927_R0036_AMP_VOL_CTRL,
0, (1<<MAX98927_AMP_VOL_WIDTH)-1, 0,
max98927_digital_tlv),
SOC_SINGLE("Amp DSP Switch", MAX98927_R0052_BROWNOUT_EN,
MAX98927_BROWNOUT_DSP_SHIFT, 1, 0),
SOC_SINGLE("Ramp Switch", MAX98927_R0037_AMP_DSP_CFG,
MAX98927_AMP_DSP_CFG_RMP_SHIFT, 1, 0),
SOC_SINGLE("DRE Switch", MAX98927_R0039_DRE_CTRL,
MAX98927_DRE_EN_SHIFT, 1, 0),
SOC_SINGLE("Volume Location Switch", MAX98927_R0036_AMP_VOL_CTRL,
MAX98927_AMP_VOL_SEL_SHIFT, 1, 0),
SOC_ENUM("Boost Output Voltage", max98927_boost_voltage),
SOC_ENUM("Current Limit", max98927_current_limit),
};
static const struct snd_soc_dapm_route max98927_audio_map[] = {
{"Amp Enable", NULL, "DAI_OUT"},
{"DAI Sel Mux", "Left", "Amp Enable"},
{"DAI Sel Mux", "Right", "Amp Enable"},
{"DAI Sel Mux", "LeftRight", "Amp Enable"},
{"BE_OUT", NULL, "DAI Sel Mux"},
};
static struct snd_soc_dai_driver max98927_dai[] = {
{
.name = "max98927-aif1",
.playback = {
.stream_name = "HiFi Playback",
.channels_min = 1,
.channels_max = 2,
.rates = MAX98927_RATES,
.formats = MAX98927_FORMATS,
},
.capture = {
.stream_name = "HiFi Capture",
.channels_min = 1,
.channels_max = 2,
.rates = MAX98927_RATES,
.formats = MAX98927_FORMATS,
},
.ops = &max98927_dai_ops,
}
};
static int max98927_probe(struct snd_soc_codec *codec)
{
struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
max98927->codec = codec;
codec->control_data = max98927->regmap;
codec->cache_bypass = 1;
/* Software Reset */
regmap_write(max98927->regmap,
MAX98927_R0100_SOFT_RESET, MAX98927_SOFT_RESET);
/* IV default slot configuration */
regmap_write(max98927->regmap,
MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
0xFF);
regmap_write(max98927->regmap,
MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
0xFF);
regmap_write(max98927->regmap,
MAX98927_R0025_PCM_TO_SPK_MONOMIX_A,
0x80);
regmap_write(max98927->regmap,
MAX98927_R0026_PCM_TO_SPK_MONOMIX_B,
0x1);
/* Set inital volume (+13dB) */
regmap_write(max98927->regmap,
MAX98927_R0036_AMP_VOL_CTRL,
0x38);
regmap_write(max98927->regmap,
MAX98927_R003C_SPK_GAIN,
0x05);
/* Enable DC blocker */
regmap_write(max98927->regmap,
MAX98927_R0037_AMP_DSP_CFG,
0x03);
/* Enable IMON VMON DC blocker */
regmap_write(max98927->regmap,
MAX98927_R003F_MEAS_DSP_CFG,
0xF7);
/* Boost Output Voltage & Current limit */
regmap_write(max98927->regmap,
MAX98927_R0040_BOOST_CTRL0,
0x1C);
regmap_write(max98927->regmap,
MAX98927_R0042_BOOST_CTRL1,
0x3E);
/* Measurement ADC config */
regmap_write(max98927->regmap,
MAX98927_R0043_MEAS_ADC_CFG,
0x04);
regmap_write(max98927->regmap,
MAX98927_R0044_MEAS_ADC_BASE_MSB,
0x00);
regmap_write(max98927->regmap,
MAX98927_R0045_MEAS_ADC_BASE_LSB,
0x24);
/* Brownout Level */
regmap_write(max98927->regmap,
MAX98927_R007F_BROWNOUT_LVL4_AMP1_CTRL1,
0x06);
/* Envelope Tracking configuration */
regmap_write(max98927->regmap,
MAX98927_R0082_ENV_TRACK_VOUT_HEADROOM,
0x08);
regmap_write(max98927->regmap,
MAX98927_R0086_ENV_TRACK_CTRL,
0x01);
regmap_write(max98927->regmap,
MAX98927_R0087_ENV_TRACK_BOOST_VOUT_READ,
0x10);
/* voltage, current slot configuration */
regmap_write(max98927->regmap,
MAX98927_R001E_PCM_TX_CH_SRC_A,
(max98927->i_l_slot<<MAX98927_PCM_TX_CH_SRC_A_I_SHIFT|
max98927->v_l_slot)&0xFF);
if (max98927->v_l_slot < 8) {
regmap_update_bits(max98927->regmap,
MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
1 << max98927->v_l_slot, 0);
regmap_update_bits(max98927->regmap,
MAX98927_R001A_PCM_TX_EN_A,
1 << max98927->v_l_slot,
1 << max98927->v_l_slot);
} else {
regmap_update_bits(max98927->regmap,
MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
1 << (max98927->v_l_slot - 8), 0);
regmap_update_bits(max98927->regmap,
MAX98927_R001B_PCM_TX_EN_B,
1 << (max98927->v_l_slot - 8),
1 << (max98927->v_l_slot - 8));
}
if (max98927->i_l_slot < 8) {
regmap_update_bits(max98927->regmap,
MAX98927_R001C_PCM_TX_HIZ_CTRL_A,
1 << max98927->i_l_slot, 0);
regmap_update_bits(max98927->regmap,
MAX98927_R001A_PCM_TX_EN_A,
1 << max98927->i_l_slot,
1 << max98927->i_l_slot);
} else {
regmap_update_bits(max98927->regmap,
MAX98927_R001D_PCM_TX_HIZ_CTRL_B,
1 << (max98927->i_l_slot - 8), 0);
regmap_update_bits(max98927->regmap,
MAX98927_R001B_PCM_TX_EN_B,
1 << (max98927->i_l_slot - 8),
1 << (max98927->i_l_slot - 8));
}
/* Set interleave mode */
if (max98927->interleave_mode)
regmap_update_bits(max98927->regmap,
MAX98927_R001F_PCM_TX_CH_SRC_B,
MAX98927_PCM_TX_CH_INTERLEAVE_MASK,
MAX98927_PCM_TX_CH_INTERLEAVE_MASK);
return 0;
}
static const struct snd_soc_codec_driver soc_codec_dev_max98927 = {
.probe = max98927_probe,
.component_driver = {
.controls = max98927_snd_controls,
.num_controls = ARRAY_SIZE(max98927_snd_controls),
.dapm_widgets = max98927_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max98927_dapm_widgets),
.dapm_routes = max98927_audio_map,
.num_dapm_routes = ARRAY_SIZE(max98927_audio_map),
},
};
static const struct regmap_config max98927_regmap = {
.reg_bits = 16,
.val_bits = 8,
.max_register = MAX98927_R01FF_REV_ID,
.reg_defaults = max98927_reg,
.num_reg_defaults = ARRAY_SIZE(max98927_reg),
.readable_reg = max98927_readable_register,
.volatile_reg = max98927_volatile_reg,
.cache_type = REGCACHE_RBTREE,
};
static void max98927_slot_config(struct i2c_client *i2c,
struct max98927_priv *max98927)
{
int value;
if (!of_property_read_u32(i2c->dev.of_node,
"vmon-slot-no", &value))
max98927->v_l_slot = value & 0xF;
else
max98927->v_l_slot = 0;
if (!of_property_read_u32(i2c->dev.of_node,
"imon-slot-no", &value))
max98927->i_l_slot = value & 0xF;
else
max98927->i_l_slot = 1;
}
static int max98927_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
int ret = 0, value;
int reg = 0;
struct max98927_priv *max98927 = NULL;
max98927 = devm_kzalloc(&i2c->dev,
sizeof(*max98927), GFP_KERNEL);
if (!max98927) {
ret = -ENOMEM;
return ret;
}
i2c_set_clientdata(i2c, max98927);
/* update interleave mode info */
if (!of_property_read_u32(i2c->dev.of_node,
"interleave_mode", &value)) {
if (value > 0)
max98927->interleave_mode = 1;
else
max98927->interleave_mode = 0;
} else
max98927->interleave_mode = 0;
/* regmap initialization */
max98927->regmap
= devm_regmap_init_i2c(i2c, &max98927_regmap);
if (IS_ERR(max98927->regmap)) {
ret = PTR_ERR(max98927->regmap);
dev_err(&i2c->dev,
"Failed to allocate regmap: %d\n", ret);
return ret;
}
/* Check Revision ID */
ret = regmap_read(max98927->regmap,
MAX98927_R01FF_REV_ID, ®);
if (ret < 0) {
dev_err(&i2c->dev,
"Failed to read: 0x%02X\n", MAX98927_R01FF_REV_ID);
return ret;
}
dev_info(&i2c->dev, "MAX98927 revisionID: 0x%02X\n", reg);
/* voltage/current slot configuration */
max98927_slot_config(i2c, max98927);
/* codec registeration */
ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_max98927,
max98927_dai, ARRAY_SIZE(max98927_dai));
if (ret < 0)
dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
return ret;
}
static int max98927_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id max98927_i2c_id[] = {
{ "max98927", 0},
{ },
};
MODULE_DEVICE_TABLE(i2c, max98927_i2c_id);
#if defined(CONFIG_OF)
static const struct of_device_id max98927_of_match[] = {
{ .compatible = "maxim,max98927", },
{ }
};
MODULE_DEVICE_TABLE(of, max98927_of_match);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id max98927_acpi_match[] = {
{ "MX98927", 0 },
{},
};
MODULE_DEVICE_TABLE(acpi, max98927_acpi_match);
#endif
static struct i2c_driver max98927_i2c_driver = {
.driver = {
.name = "max98927",
.of_match_table = of_match_ptr(max98927_of_match),
.acpi_match_table = ACPI_PTR(max98927_acpi_match),
.pm = NULL,
},
.probe = max98927_i2c_probe,
.remove = max98927_i2c_remove,
.id_table = max98927_i2c_id,
};
module_i2c_driver(max98927_i2c_driver)
MODULE_DESCRIPTION("ALSA SoC MAX98927 driver");
MODULE_AUTHOR("Ryan Lee <ryans.lee@maximintegrated.com>");
MODULE_LICENSE("GPL");
