#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "max98371.h"
static const char *const monomix_text[] = {
"Left", "Right", "LeftRightDiv2",
};
static const char *const hpf_cutoff_txt[] = {
"Disable", "DC Block", "50Hz",
"100Hz", "200Hz", "400Hz", "800Hz",
};
static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0,
monomix_text);
static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0,
hpf_cutoff_txt);
static const DECLARE_TLV_DB_RANGE(max98371_dht_min_gain,
0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
10, 11, TLV_DB_SCALE_ITEM(1699, 101, 0),
);
static const DECLARE_TLV_DB_RANGE(max98371_dht_max_gain,
0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
10, 11, TLV_DB_SCALE_ITEM(1699, 208, 0),
);
static const DECLARE_TLV_DB_RANGE(max98371_dht_rot_gain,
0, 1, TLV_DB_SCALE_ITEM(-50, -50, 0),
2, 6, TLV_DB_SCALE_ITEM(-100, -100, 0),
7, 8, TLV_DB_SCALE_ITEM(-800, -200, 0),
9, 11, TLV_DB_SCALE_ITEM(-1200, -300, 0),
12, 13, TLV_DB_SCALE_ITEM(-2000, -200, 0),
14, 15, TLV_DB_SCALE_ITEM(-2500, -500, 0),
);
static const struct reg_default max98371_reg[] = {
{ 0x01, 0x00 },
{ 0x02, 0x00 },
{ 0x03, 0x00 },
{ 0x04, 0x00 },
{ 0x05, 0x00 },
{ 0x06, 0x00 },
{ 0x07, 0x00 },
{ 0x08, 0x00 },
{ 0x09, 0x00 },
{ 0x0A, 0x00 },
{ 0x10, 0x06 },
{ 0x11, 0x08 },
{ 0x14, 0x80 },
{ 0x15, 0x00 },
{ 0x16, 0x00 },
{ 0x18, 0x00 },
{ 0x19, 0x00 },
{ 0x1C, 0x00 },
{ 0x1D, 0x00 },
{ 0x1E, 0x00 },
{ 0x1F, 0x00 },
{ 0x20, 0x00 },
{ 0x21, 0x00 },
{ 0x22, 0x00 },
{ 0x23, 0x00 },
{ 0x24, 0x00 },
{ 0x25, 0x00 },
{ 0x26, 0x00 },
{ 0x27, 0x00 },
{ 0x28, 0x00 },
{ 0x29, 0x00 },
{ 0x2A, 0x00 },
{ 0x2B, 0x00 },
{ 0x2C, 0x00 },
{ 0x2D, 0x00 },
{ 0x2E, 0x0B },
{ 0x31, 0x00 },
{ 0x32, 0x18 },
{ 0x33, 0x00 },
{ 0x34, 0x00 },
{ 0x36, 0x00 },
{ 0x37, 0x00 },
{ 0x38, 0x00 },
{ 0x39, 0x00 },
{ 0x3A, 0x00 },
{ 0x3B, 0x00 },
{ 0x3C, 0x00 },
{ 0x3D, 0x00 },
{ 0x3E, 0x00 },
{ 0x3F, 0x00 },
{ 0x40, 0x00 },
{ 0x41, 0x00 },
{ 0x42, 0x00 },
{ 0x43, 0x00 },
{ 0x4A, 0x00 },
{ 0x4B, 0x00 },
{ 0x4C, 0x00 },
{ 0x4D, 0x00 },
{ 0x4E, 0x00 },
{ 0x50, 0x00 },
{ 0x51, 0x00 },
{ 0x55, 0x00 },
{ 0x58, 0x00 },
{ 0x59, 0x00 },
{ 0x5C, 0x00 },
{ 0xFF, 0x43 },
};
static bool max98371_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX98371_IRQ_CLEAR1:
case MAX98371_IRQ_CLEAR2:
case MAX98371_IRQ_CLEAR3:
case MAX98371_VERSION:
return true;
default:
return false;
}
}
static bool max98371_readable_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX98371_SOFT_RESET:
return false;
default:
return true;
}
};
static const DECLARE_TLV_DB_RANGE(max98371_gain_tlv,
0, 7, TLV_DB_SCALE_ITEM(0, 50, 0),
8, 10, TLV_DB_SCALE_ITEM(400, 100, 0)
);
static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1);
static const struct snd_kcontrol_new max98371_snd_controls[] = {
SOC_SINGLE_TLV("Speaker Volume", MAX98371_GAIN,
MAX98371_GAIN_SHIFT, (1<<MAX98371_GAIN_WIDTH)-1, 0,
max98371_gain_tlv),
SOC_SINGLE_TLV("Digital Volume", MAX98371_DIGITAL_GAIN, 0,
(1<<MAX98371_DIGITAL_GAIN_WIDTH)-1, 1, digital_tlv),
SOC_SINGLE_TLV("Speaker DHT Max Volume", MAX98371_GAIN,
0, (1<<MAX98371_DHT_MAX_WIDTH)-1, 0,
max98371_dht_max_gain),
SOC_SINGLE_TLV("Speaker DHT Min Volume", MAX98371_DHT_GAIN,
0, (1<<MAX98371_DHT_GAIN_WIDTH)-1, 0,
max98371_dht_min_gain),
SOC_SINGLE_TLV("Speaker DHT Rotation Volume", MAX98371_DHT_GAIN,
0, (1<<MAX98371_DHT_ROT_WIDTH)-1, 0,
max98371_dht_rot_gain),
SOC_SINGLE("DHT Attack Step", MAX98371_DHT, MAX98371_DHT_STEP, 3, 0),
SOC_SINGLE("DHT Attack Rate", MAX98371_DHT, 0, 7, 0),
SOC_ENUM("Monomix Select", max98371_monomix),
SOC_ENUM("HPF Cutoff", max98371_hpf_cutoff),
};
static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component);
unsigned int val = 0;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_CBC_CFC:
break;
default:
dev_err(component->dev, "DAI clock mode unsupported");
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
val |= 0;
break;
case SND_SOC_DAIFMT_RIGHT_J:
val |= MAX98371_DAI_RIGHT;
break;
case SND_SOC_DAIFMT_LEFT_J:
val |= MAX98371_DAI_LEFT;
break;
default:
dev_err(component->dev, "DAI wrong mode unsupported");
return -EINVAL;
}
regmap_update_bits(max98371->regmap, MAX98371_FMT,
MAX98371_FMT_MODE_MASK, val);
return 0;
}
static int max98371_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component);
int blr_clk_ratio, ch_size, channels = params_channels(params);
int rate = params_rate(params);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
regmap_update_bits(max98371->regmap, MAX98371_FMT,
MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
ch_size = 8;
break;
case SNDRV_PCM_FORMAT_S16_LE:
regmap_update_bits(max98371->regmap, MAX98371_FMT,
MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
ch_size = 16;
break;
case SNDRV_PCM_FORMAT_S24_LE:
regmap_update_bits(max98371->regmap, MAX98371_FMT,
MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
ch_size = 24;
break;
case SNDRV_PCM_FORMAT_S32_LE:
regmap_update_bits(max98371->regmap, MAX98371_FMT,
MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
ch_size = 32;
break;
default:
return -EINVAL;
}
blr_clk_ratio = channels * ch_size;
switch (blr_clk_ratio) {
case 32:
regmap_update_bits(max98371->regmap,
MAX98371_DAI_CLK,
MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32);
break;
case 48:
regmap_update_bits(max98371->regmap,
MAX98371_DAI_CLK,
MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48);
break;
case 64:
regmap_update_bits(max98371->regmap,
MAX98371_DAI_CLK,
MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64);
break;
default:
return -EINVAL;
}
switch (rate) {
case 32000:
regmap_update_bits(max98371->regmap,
MAX98371_SPK_SR,
MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32);
break;
case 44100:
regmap_update_bits(max98371->regmap,
MAX98371_SPK_SR,
MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44);
break;
case 48000:
regmap_update_bits(max98371->regmap,
MAX98371_SPK_SR,
MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48);
break;
case 88200:
regmap_update_bits(max98371->regmap,
MAX98371_SPK_SR,
MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88);
break;
case 96000:
regmap_update_bits(max98371->regmap,
MAX98371_SPK_SR,
MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96);
break;
default:
return -EINVAL;
}
regmap_update_bits(max98371->regmap, MAX98371_MONOMIX_SRC,
MAX98371_MONOMIX_SRC_MASK, MONOMIX_RX_0_1);
regmap_update_bits(max98371->regmap, MAX98371_DAI_CHANNEL,
MAX98371_CHANNEL_MASK, MAX98371_CHANNEL_MASK);
return 0;
}
static const struct snd_soc_dapm_widget max98371_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", NULL, MAX98371_SPK_ENABLE, 0, 0),
SND_SOC_DAPM_SUPPLY("Global Enable", MAX98371_GLOBAL_ENABLE,
0, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("SPK_OUT"),
};
static const struct snd_soc_dapm_route max98371_audio_map[] = {
{"DAC", NULL, "HiFi Playback"},
{"SPK_OUT", NULL, "DAC"},
{"SPK_OUT", NULL, "Global Enable"},
};
#define MAX98371_RATES SNDRV_PCM_RATE_8000_48000
#define MAX98371_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
static const struct snd_soc_dai_ops max98371_dai_ops = {
.set_fmt = max98371_dai_set_fmt,
.hw_params = max98371_dai_hw_params,
};
static struct snd_soc_dai_driver max98371_dai[] = {
{
.name = "max98371-aif1",
.playback = {
.stream_name = "HiFi Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = MAX98371_FORMATS,
},
.ops = &max98371_dai_ops,
}
};
static const struct snd_soc_component_driver max98371_component = {
.controls = max98371_snd_controls,
.num_controls = ARRAY_SIZE(max98371_snd_controls),
.dapm_routes = max98371_audio_map,
.num_dapm_routes = ARRAY_SIZE(max98371_audio_map),
.dapm_widgets = max98371_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max98371_dapm_widgets),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static const struct regmap_config max98371_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX98371_VERSION,
.reg_defaults = max98371_reg,
.num_reg_defaults = ARRAY_SIZE(max98371_reg),
.volatile_reg = max98371_volatile_register,
.readable_reg = max98371_readable_register,
.cache_type = REGCACHE_RBTREE,
};
static int max98371_i2c_probe(struct i2c_client *i2c)
{
struct max98371_priv *max98371;
int ret, reg;
max98371 = devm_kzalloc(&i2c->dev,
sizeof(*max98371), GFP_KERNEL);
if (!max98371)
return -ENOMEM;
i2c_set_clientdata(i2c, max98371);
max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap);
if (IS_ERR(max98371->regmap)) {
ret = PTR_ERR(max98371->regmap);
dev_err(&i2c->dev,
"Failed to allocate regmap: %d\n", ret);
return ret;
}
ret = regmap_read(max98371->regmap, MAX98371_VERSION, ®);
if (ret < 0) {
dev_info(&i2c->dev, "device error %d\n", ret);
return ret;
}
dev_info(&i2c->dev, "device version %x\n", reg);
ret = devm_snd_soc_register_component(&i2c->dev, &max98371_component,
max98371_dai, ARRAY_SIZE(max98371_dai));
if (ret < 0) {
dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
return ret;
}
return ret;
}
static const struct i2c_device_id max98371_i2c_id[] = {
{ .name = "max98371" },
{ }
};
MODULE_DEVICE_TABLE(i2c, max98371_i2c_id);
#ifdef CONFIG_OF
static const struct of_device_id max98371_of_match[] = {
{ .compatible = "maxim,max98371", },
{ }
};
MODULE_DEVICE_TABLE(of, max98371_of_match);
#endif
static struct i2c_driver max98371_i2c_driver = {
.driver = {
.name = "max98371",
.of_match_table = of_match_ptr(max98371_of_match),
},
.probe = max98371_i2c_probe,
.id_table = max98371_i2c_id,
};
module_i2c_driver(max98371_i2c_driver);
MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC MAX98371 driver");
MODULE_LICENSE("GPL");
