// SPDX-License-Identifier: GPL-2.0-only
/*
* max98926.c -- ALSA SoC MAX98926 driver
* Copyright 2013-15 Maxim Integrated Products
*/
#include <linux/delay.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 <sound/tlv.h>
#include "max98926.h"
static const char * const max98926_boost_voltage_txt[] = {
"8.5V", "8.25V", "8.0V", "7.75V", "7.5V", "7.25V", "7.0V", "6.75V",
"6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V"
};
static const char *const max98926_pdm_ch_text[] = {
"Current", "Voltage",
};
static const char *const max98926_hpf_cutoff_txt[] = {
"Disable", "DC Block", "100Hz",
"200Hz", "400Hz", "800Hz",
};
static const struct reg_default max98926_reg[] = {
{ 0x0B, 0x00 }, /* IRQ Enable0 */
{ 0x0C, 0x00 }, /* IRQ Enable1 */
{ 0x0D, 0x00 }, /* IRQ Enable2 */
{ 0x0E, 0x00 }, /* IRQ Clear0 */
{ 0x0F, 0x00 }, /* IRQ Clear1 */
{ 0x10, 0x00 }, /* IRQ Clear2 */
{ 0x11, 0xC0 }, /* Map0 */
{ 0x12, 0x00 }, /* Map1 */
{ 0x13, 0x00 }, /* Map2 */
{ 0x14, 0xF0 }, /* Map3 */
{ 0x15, 0x00 }, /* Map4 */
{ 0x16, 0xAB }, /* Map5 */
{ 0x17, 0x89 }, /* Map6 */
{ 0x18, 0x00 }, /* Map7 */
{ 0x19, 0x00 }, /* Map8 */
{ 0x1A, 0x04 }, /* DAI Clock Mode 1 */
{ 0x1B, 0x00 }, /* DAI Clock Mode 2 */
{ 0x1C, 0x00 }, /* DAI Clock Divider Denominator MSBs */
{ 0x1D, 0x00 }, /* DAI Clock Divider Denominator LSBs */
{ 0x1E, 0xF0 }, /* DAI Clock Divider Numerator MSBs */
{ 0x1F, 0x00 }, /* DAI Clock Divider Numerator LSBs */
{ 0x20, 0x50 }, /* Format */
{ 0x21, 0x00 }, /* TDM Slot Select */
{ 0x22, 0x00 }, /* DOUT Configuration VMON */
{ 0x23, 0x00 }, /* DOUT Configuration IMON */
{ 0x24, 0x00 }, /* DOUT Configuration VBAT */
{ 0x25, 0x00 }, /* DOUT Configuration VBST */
{ 0x26, 0x00 }, /* DOUT Configuration FLAG */
{ 0x27, 0xFF }, /* DOUT HiZ Configuration 1 */
{ 0x28, 0xFF }, /* DOUT HiZ Configuration 2 */
{ 0x29, 0xFF }, /* DOUT HiZ Configuration 3 */
{ 0x2A, 0xFF }, /* DOUT HiZ Configuration 4 */
{ 0x2B, 0x02 }, /* DOUT Drive Strength */
{ 0x2C, 0x90 }, /* Filters */
{ 0x2D, 0x00 }, /* Gain */
{ 0x2E, 0x02 }, /* Gain Ramping */
{ 0x2F, 0x00 }, /* Speaker Amplifier */
{ 0x30, 0x0A }, /* Threshold */
{ 0x31, 0x00 }, /* ALC Attack */
{ 0x32, 0x80 }, /* ALC Atten and Release */
{ 0x33, 0x00 }, /* ALC Infinite Hold Release */
{ 0x34, 0x92 }, /* ALC Configuration */
{ 0x35, 0x01 }, /* Boost Converter */
{ 0x36, 0x00 }, /* Block Enable */
{ 0x37, 0x00 }, /* Configuration */
{ 0x38, 0x00 }, /* Global Enable */
{ 0x3A, 0x00 }, /* Boost Limiter */
};
static const struct soc_enum max98926_voltage_enum[] = {
SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS, 0,
ARRAY_SIZE(max98926_pdm_ch_text),
max98926_pdm_ch_text),
};
static const struct snd_kcontrol_new max98926_voltage_control =
SOC_DAPM_ENUM("Route", max98926_voltage_enum);
static const struct soc_enum max98926_current_enum[] = {
SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS,
MAX98926_PDM_SOURCE_1_SHIFT,
ARRAY_SIZE(max98926_pdm_ch_text),
max98926_pdm_ch_text),
};
static const struct snd_kcontrol_new max98926_current_control =
SOC_DAPM_ENUM("Route", max98926_current_enum);
static const struct snd_kcontrol_new max98926_mixer_controls[] = {
SOC_DAPM_SINGLE("PCM Single Switch", MAX98926_SPK_AMP,
MAX98926_INSELECT_MODE_SHIFT, 0, 0),
SOC_DAPM_SINGLE("PDM Single Switch", MAX98926_SPK_AMP,
MAX98926_INSELECT_MODE_SHIFT, 1, 0),
};
static const struct snd_kcontrol_new max98926_dai_controls[] = {
SOC_DAPM_SINGLE("Left", MAX98926_GAIN,
MAX98926_DAC_IN_SEL_SHIFT, 0, 0),
SOC_DAPM_SINGLE("Right", MAX98926_GAIN,
MAX98926_DAC_IN_SEL_SHIFT, 1, 0),
SOC_DAPM_SINGLE("LeftRight", MAX98926_GAIN,
MAX98926_DAC_IN_SEL_SHIFT, 2, 0),
SOC_DAPM_SINGLE("(Left+Right)/2 Switch", MAX98926_GAIN,
MAX98926_DAC_IN_SEL_SHIFT, 3, 0),
};
static const struct snd_soc_dapm_widget max98926_dapm_widgets[] = {
SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0,
SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("Amp Enable", NULL, MAX98926_BLOCK_ENABLE,
MAX98926_SPK_EN_SHIFT, 0),
SND_SOC_DAPM_SUPPLY("Global Enable", MAX98926_GLOBAL_ENABLE,
MAX98926_EN_SHIFT, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("VI Enable", MAX98926_BLOCK_ENABLE,
MAX98926_ADC_IMON_EN_WIDTH |
MAX98926_ADC_VMON_EN_SHIFT,
0, NULL, 0),
SND_SOC_DAPM_PGA("BST Enable", MAX98926_BLOCK_ENABLE,
MAX98926_BST_EN_SHIFT, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("BE_OUT"),
SND_SOC_DAPM_MIXER("PCM Sel", MAX98926_SPK_AMP,
MAX98926_INSELECT_MODE_SHIFT, 0,
&max98926_mixer_controls[0],
ARRAY_SIZE(max98926_mixer_controls)),
SND_SOC_DAPM_MIXER("DAI Sel",
MAX98926_GAIN, MAX98926_DAC_IN_SEL_SHIFT, 0,
&max98926_dai_controls[0],
ARRAY_SIZE(max98926_dai_controls)),
SND_SOC_DAPM_MUX("PDM CH1 Source",
MAX98926_DAI_CLK_DIV_N_LSBS,
MAX98926_PDM_CURRENT_SHIFT,
0, &max98926_current_control),
SND_SOC_DAPM_MUX("PDM CH0 Source",
MAX98926_DAI_CLK_DIV_N_LSBS,
MAX98926_PDM_VOLTAGE_SHIFT,
0, &max98926_voltage_control),
};
static const struct snd_soc_dapm_route max98926_audio_map[] = {
{"VI Enable", NULL, "DAI_OUT"},
{"DAI Sel", "Left", "VI Enable"},
{"DAI Sel", "Right", "VI Enable"},
{"DAI Sel", "LeftRight", "VI Enable"},
{"DAI Sel", "LeftRightDiv2", "VI Enable"},
{"PCM Sel", "PCM", "DAI Sel"},
{"PDM CH1 Source", "Current", "DAI_OUT"},
{"PDM CH1 Source", "Voltage", "DAI_OUT"},
{"PDM CH0 Source", "Current", "DAI_OUT"},
{"PDM CH0 Source", "Voltage", "DAI_OUT"},
{"PCM Sel", "Analog", "PDM CH1 Source"},
{"PCM Sel", "Analog", "PDM CH0 Source"},
{"Amp Enable", NULL, "PCM Sel"},
{"BST Enable", NULL, "Amp Enable"},
{"BE_OUT", NULL, "BST Enable"},
};
static bool max98926_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX98926_VBAT_DATA:
case MAX98926_VBST_DATA:
case MAX98926_LIVE_STATUS0:
case MAX98926_LIVE_STATUS1:
case MAX98926_LIVE_STATUS2:
case MAX98926_STATE0:
case MAX98926_STATE1:
case MAX98926_STATE2:
case MAX98926_FLAG0:
case MAX98926_FLAG1:
case MAX98926_FLAG2:
case MAX98926_VERSION:
return true;
default:
return false;
}
}
static bool max98926_readable_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX98926_IRQ_CLEAR0:
case MAX98926_IRQ_CLEAR1:
case MAX98926_IRQ_CLEAR2:
case MAX98926_ALC_HOLD_RLS:
return false;
default:
return true;
}
};
static DECLARE_TLV_DB_SCALE(max98926_spk_tlv, -600, 100, 0);
static DECLARE_TLV_DB_RANGE(max98926_current_tlv,
0, 11, TLV_DB_SCALE_ITEM(20, 20, 0),
12, 15, TLV_DB_SCALE_ITEM(320, 40, 0),
);
static SOC_ENUM_SINGLE_DECL(max98926_dac_hpf_cutoff,
MAX98926_FILTERS, MAX98926_DAC_HPF_SHIFT,
max98926_hpf_cutoff_txt);
static SOC_ENUM_SINGLE_DECL(max98926_boost_voltage,
MAX98926_CONFIGURATION, MAX98926_BST_VOUT_SHIFT,
max98926_boost_voltage_txt);
static const struct snd_kcontrol_new max98926_snd_controls[] = {
SOC_SINGLE_TLV("Speaker Volume", MAX98926_GAIN,
MAX98926_SPK_GAIN_SHIFT,
(1<<MAX98926_SPK_GAIN_WIDTH)-1, 0,
max98926_spk_tlv),
SOC_SINGLE("Ramp Switch", MAX98926_GAIN_RAMPING,
MAX98926_SPK_RMP_EN_SHIFT, 1, 0),
SOC_SINGLE("ZCD Switch", MAX98926_GAIN_RAMPING,
MAX98926_SPK_ZCD_EN_SHIFT, 1, 0),
SOC_SINGLE("ALC Switch", MAX98926_THRESHOLD,
MAX98926_ALC_EN_SHIFT, 1, 0),
SOC_SINGLE("ALC Threshold", MAX98926_THRESHOLD,
MAX98926_ALC_TH_SHIFT,
(1<<MAX98926_ALC_TH_WIDTH)-1, 0),
SOC_ENUM("Boost Output Voltage", max98926_boost_voltage),
SOC_SINGLE_TLV("Boost Current Limit", MAX98926_BOOST_LIMITER,
MAX98926_BST_ILIM_SHIFT,
(1<<MAX98926_BST_ILIM_SHIFT)-1, 0,
max98926_current_tlv),
SOC_ENUM("DAC HPF Cutoff", max98926_dac_hpf_cutoff),
SOC_DOUBLE("PDM Channel One", MAX98926_DAI_CLK_DIV_N_LSBS,
MAX98926_PDM_CHANNEL_1_SHIFT,
MAX98926_PDM_CHANNEL_1_HIZ, 1, 0),
SOC_DOUBLE("PDM Channel Zero", MAX98926_DAI_CLK_DIV_N_LSBS,
MAX98926_PDM_CHANNEL_0_SHIFT,
MAX98926_PDM_CHANNEL_0_HIZ, 1, 0),
};
static const struct {
int rate;
int sr;
} rate_table[] = {
{
.rate = 8000,
.sr = 0,
},
{
.rate = 11025,
.sr = 1,
},
{
.rate = 12000,
.sr = 2,
},
{
.rate = 16000,
.sr = 3,
},
{
.rate = 22050,
.sr = 4,
},
{
.rate = 24000,
.sr = 5,
},
{
.rate = 32000,
.sr = 6,
},
{
.rate = 44100,
.sr = 7,
},
{
.rate = 48000,
.sr = 8,
},
};
static void max98926_set_sense_data(struct max98926_priv *max98926)
{
regmap_update_bits(max98926->regmap,
MAX98926_DOUT_CFG_VMON,
MAX98926_DAI_VMON_EN_MASK,
MAX98926_DAI_VMON_EN_MASK);
regmap_update_bits(max98926->regmap,
MAX98926_DOUT_CFG_IMON,
MAX98926_DAI_IMON_EN_MASK,
MAX98926_DAI_IMON_EN_MASK);
if (!max98926->interleave_mode) {
/* set VMON slots */
regmap_update_bits(max98926->regmap,
MAX98926_DOUT_CFG_VMON,
MAX98926_DAI_VMON_SLOT_MASK,
max98926->v_slot);
/* set IMON slots */
regmap_update_bits(max98926->regmap,
MAX98926_DOUT_CFG_IMON,
MAX98926_DAI_IMON_SLOT_MASK,
max98926->i_slot);
} else {
/* enable interleave mode */
regmap_update_bits(max98926->regmap,
MAX98926_FORMAT,
MAX98926_DAI_INTERLEAVE_MASK,
MAX98926_DAI_INTERLEAVE_MASK);
/* set interleave slots */
regmap_update_bits(max98926->regmap,
MAX98926_DOUT_CFG_VBAT,
MAX98926_DAI_INTERLEAVE_SLOT_MASK,
max98926->v_slot);
}
}
static int max98926_dai_set_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
unsigned int invert = 0;
dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_CBC_CFC:
max98926_set_sense_data(max98926);
break;
default:
dev_err(component->dev, "DAI clock mode unsupported\n");
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_NB_IF:
invert = MAX98926_DAI_WCI_MASK;
break;
case SND_SOC_DAIFMT_IB_NF:
invert = MAX98926_DAI_BCI_MASK;
break;
case SND_SOC_DAIFMT_IB_IF:
invert = MAX98926_DAI_BCI_MASK | MAX98926_DAI_WCI_MASK;
break;
default:
dev_err(component->dev, "DAI invert mode unsupported\n");
return -EINVAL;
}
regmap_write(max98926->regmap,
MAX98926_FORMAT, MAX98926_DAI_DLY_MASK);
regmap_update_bits(max98926->regmap, MAX98926_FORMAT,
MAX98926_DAI_BCI_MASK, invert);
return 0;
}
static int max98926_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
int dai_sr = -EINVAL;
int rate = params_rate(params), i;
struct snd_soc_component *component = dai->component;
struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
int blr_clk_ratio;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
regmap_update_bits(max98926->regmap,
MAX98926_FORMAT,
MAX98926_DAI_CHANSZ_MASK,
MAX98926_DAI_CHANSZ_16);
max98926->ch_size = 16;
break;
case SNDRV_PCM_FORMAT_S24_LE:
regmap_update_bits(max98926->regmap,
MAX98926_FORMAT,
MAX98926_DAI_CHANSZ_MASK,
MAX98926_DAI_CHANSZ_24);
max98926->ch_size = 24;
break;
case SNDRV_PCM_FORMAT_S32_LE:
regmap_update_bits(max98926->regmap,
MAX98926_FORMAT,
MAX98926_DAI_CHANSZ_MASK,
MAX98926_DAI_CHANSZ_32);
max98926->ch_size = 32;
break;
default:
dev_dbg(component->dev, "format unsupported %d\n",
params_format(params));
return -EINVAL;
}
/* BCLK/LRCLK ratio calculation */
blr_clk_ratio = params_channels(params) * max98926->ch_size;
switch (blr_clk_ratio) {
case 32:
regmap_update_bits(max98926->regmap,
MAX98926_DAI_CLK_MODE2,
MAX98926_DAI_BSEL_MASK,
MAX98926_DAI_BSEL_32);
break;
case 48:
regmap_update_bits(max98926->regmap,
MAX98926_DAI_CLK_MODE2,
MAX98926_DAI_BSEL_MASK,
MAX98926_DAI_BSEL_48);
break;
case 64:
regmap_update_bits(max98926->regmap,
MAX98926_DAI_CLK_MODE2,
MAX98926_DAI_BSEL_MASK,
MAX98926_DAI_BSEL_64);
break;
default:
return -EINVAL;
}
/* find the closest rate */
for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
if (rate_table[i].rate >= rate) {
dai_sr = rate_table[i].sr;
break;
}
}
if (dai_sr < 0)
return -EINVAL;
/* set DAI_SR to correct LRCLK frequency */
regmap_update_bits(max98926->regmap,
MAX98926_DAI_CLK_MODE2,
MAX98926_DAI_SR_MASK, dai_sr << MAX98926_DAI_SR_SHIFT);
return 0;
}
#define MAX98926_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static const struct snd_soc_dai_ops max98926_dai_ops = {
.set_fmt = max98926_dai_set_fmt,
.hw_params = max98926_dai_hw_params,
};
static struct snd_soc_dai_driver max98926_dai[] = {
{
.name = "max98926-aif1",
.playback = {
.stream_name = "HiFi Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = MAX98926_FORMATS,
},
.capture = {
.stream_name = "HiFi Capture",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = MAX98926_FORMATS,
},
.ops = &max98926_dai_ops,
}
};
static int max98926_probe(struct snd_soc_component *component)
{
struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
max98926->component = component;
/* Hi-Z all the slots */
regmap_write(max98926->regmap, MAX98926_DOUT_HIZ_CFG4, 0xF0);
return 0;
}
static const struct snd_soc_component_driver soc_component_dev_max98926 = {
.probe = max98926_probe,
.controls = max98926_snd_controls,
.num_controls = ARRAY_SIZE(max98926_snd_controls),
.dapm_routes = max98926_audio_map,
.num_dapm_routes = ARRAY_SIZE(max98926_audio_map),
.dapm_widgets = max98926_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max98926_dapm_widgets),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static const struct regmap_config max98926_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX98926_VERSION,
.reg_defaults = max98926_reg,
.num_reg_defaults = ARRAY_SIZE(max98926_reg),
.volatile_reg = max98926_volatile_register,
.readable_reg = max98926_readable_register,
.cache_type = REGCACHE_RBTREE,
};
static int max98926_i2c_probe(struct i2c_client *i2c)
{
int ret, reg;
u32 value;
struct max98926_priv *max98926;
max98926 = devm_kzalloc(&i2c->dev,
sizeof(*max98926), GFP_KERNEL);
if (!max98926)
return -ENOMEM;
i2c_set_clientdata(i2c, max98926);
max98926->regmap = devm_regmap_init_i2c(i2c, &max98926_regmap);
if (IS_ERR(max98926->regmap)) {
ret = PTR_ERR(max98926->regmap);
dev_err(&i2c->dev,
"Failed to allocate regmap: %d\n", ret);
goto err_out;
}
if (of_property_read_bool(i2c->dev.of_node, "maxim,interleave-mode") ||
of_property_read_bool(i2c->dev.of_node, "interleave-mode"))
max98926->interleave_mode = true;
if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) {
if (value > MAX98926_DAI_VMON_SLOT_1E_1F) {
dev_err(&i2c->dev, "vmon slot number is wrong:\n");
return -EINVAL;
}
max98926->v_slot = value;
}
if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) {
if (value > MAX98926_DAI_IMON_SLOT_1E_1F) {
dev_err(&i2c->dev, "imon slot number is wrong:\n");
return -EINVAL;
}
max98926->i_slot = value;
}
ret = regmap_read(max98926->regmap,
MAX98926_VERSION, ®);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to read: %x\n", reg);
return ret;
}
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_component_dev_max98926,
max98926_dai, ARRAY_SIZE(max98926_dai));
if (ret < 0)
dev_err(&i2c->dev,
"Failed to register component: %d\n", ret);
dev_info(&i2c->dev, "device version: %x\n", reg);
err_out:
return ret;
}
static const struct i2c_device_id max98926_i2c_id[] = {
{ "max98926" },
{ }
};
MODULE_DEVICE_TABLE(i2c, max98926_i2c_id);
#ifdef CONFIG_OF
static const struct of_device_id max98926_of_match[] = {
{ .compatible = "maxim,max98926", },
{ }
};
MODULE_DEVICE_TABLE(of, max98926_of_match);
#endif
static struct i2c_driver max98926_i2c_driver = {
.driver = {
.name = "max98926",
.of_match_table = of_match_ptr(max98926_of_match),
},
.probe = max98926_i2c_probe,
.id_table = max98926_i2c_id,
};
module_i2c_driver(max98926_i2c_driver)
MODULE_DESCRIPTION("ALSA SoC MAX98926 driver");
MODULE_AUTHOR("Anish kumar <[email protected]>");
MODULE_LICENSE("GPL");
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