#include <linux/bits.h>
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#define RT9120_REG_DEVID 0x00
#define RT9120_REG_I2SFMT 0x02
#define RT9120_REG_I2SWL 0x03
#define RT9120_REG_SDIOSEL 0x04
#define RT9120_REG_SYSCTL 0x05
#define RT9120_REG_SPKGAIN 0x07
#define RT9120_REG_VOLRAMP 0x0A
#define RT9120_REG_ERRRPT 0x10
#define RT9120_REG_MSVOL 0x20
#define RT9120_REG_SWRESET 0x40
#define RT9120_REG_INTERCFG 0x63
#define RT9120_REG_INTERNAL0 0x65
#define RT9120_REG_INTERNAL1 0x69
#define RT9120_REG_UVPOPT 0x6C
#define RT9120_REG_DIGCFG 0xF8
#define RT9120_VID_MASK GENMASK(15, 8)
#define RT9120_SWRST_MASK BIT(7)
#define RT9120_MUTE_MASK GENMASK(5, 4)
#define RT9120_I2SFMT_MASK GENMASK(4, 2)
#define RT9120_I2SFMT_SHIFT 2
#define RT9120_CFG_FMT_I2S 0
#define RT9120_CFG_FMT_LEFTJ 1
#define RT9120_CFG_FMT_RIGHTJ 2
#define RT9120_CFG_FMT_DSPA 3
#define RT9120_CFG_FMT_DSPB 7
#define RT9120_AUDBIT_MASK GENMASK(1, 0)
#define RT9120_CFG_AUDBIT_16 0
#define RT9120_CFG_AUDBIT_20 1
#define RT9120_CFG_AUDBIT_24 2
#define RT9120_AUDWL_MASK GENMASK(5, 0)
#define RT9120_CFG_WORDLEN_16 16
#define RT9120_CFG_WORDLEN_24 24
#define RT9120_CFG_WORDLEN_32 32
#define RT9120_DVDD_UVSEL_MASK GENMASK(5, 4)
#define RT9120_AUTOSYNC_MASK BIT(6)
#define RT9120_VENDOR_ID 0x42
#define RT9120S_VENDOR_ID 0x43
#define RT9120_RESET_WAITMS 20
#define RT9120_CHIPON_WAITMS 20
#define RT9120_AMPON_WAITMS 50
#define RT9120_AMPOFF_WAITMS 100
#define RT9120_LVAPP_THRESUV 2000000
#define RT9120_RATES_MASK (SNDRV_PCM_RATE_8000_192000 &\
~SNDRV_PCM_RATE_176400)
#define RT9120_FMTS_MASK (SNDRV_PCM_FMTBIT_S16_LE |\
SNDRV_PCM_FMTBIT_S24_LE |\
SNDRV_PCM_FMTBIT_S32_LE)
enum {
CHIP_IDX_RT9120 = 0,
CHIP_IDX_RT9120S,
CHIP_IDX_MAX
};
struct rt9120_data {
struct device *dev;
struct regmap *regmap;
struct gpio_desc *pwdnn_gpio;
int chip_idx;
};
static const DECLARE_TLV_DB_SCALE(digital_tlv, -1039375, 625, 1);
static const DECLARE_TLV_DB_RANGE(classd_tlv,
0, 3, TLV_DB_SCALE_ITEM(600, 200, 0),
4, 7, TLV_DB_SCALE_ITEM(1300, 100, 0)
);
static const char * const sdo_select_text[] = {
"None", "INTF", "Final", "RMS Detect"
};
static const struct soc_enum sdo_select_enum =
SOC_ENUM_SINGLE(RT9120_REG_SDIOSEL, 4, ARRAY_SIZE(sdo_select_text),
sdo_select_text);
static const struct snd_kcontrol_new rt9120_snd_controls[] = {
SOC_SINGLE_TLV("MS Volume", RT9120_REG_MSVOL, 0, 2047, 1, digital_tlv),
SOC_SINGLE_TLV("SPK Gain Volume", RT9120_REG_SPKGAIN, 0, 7, 0, classd_tlv),
SOC_SINGLE("PBTL Switch", RT9120_REG_SYSCTL, 3, 1, 0),
SOC_ENUM("SDO Select", sdo_select_enum),
};
static int internal_power_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
snd_soc_component_write(comp, RT9120_REG_ERRRPT, 0);
break;
case SND_SOC_DAPM_POST_PMU:
msleep(RT9120_AMPON_WAITMS);
break;
case SND_SOC_DAPM_POST_PMD:
msleep(RT9120_AMPOFF_WAITMS);
break;
default:
break;
}
return 0;
}
static const struct snd_soc_dapm_widget rt9120_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("DMIX", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_DAC("LDAC", NULL, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("RDAC", NULL, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_SUPPLY("PWND", RT9120_REG_SYSCTL, 6, 1,
internal_power_event, SND_SOC_DAPM_PRE_PMU |
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_PGA("SPKL PA", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_PGA("SPKR PA", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("SPKL"),
SND_SOC_DAPM_OUTPUT("SPKR"),
};
static const struct snd_soc_dapm_route rt9120_dapm_routes[] = {
{ "DMIX", NULL, "AIF Playback" },
{ "LDAC", NULL, "PWND" },
{ "LDAC", NULL, "DMIX" },
{ "SPKL PA", NULL, "LDAC" },
{ "SPKL", NULL, "SPKL PA" },
{ "RDAC", NULL, "PWND" },
{ "RDAC", NULL, "DMIX" },
{ "SPKR PA", NULL, "RDAC" },
{ "SPKR", NULL, "SPKR PA" },
{ "AIF Capture", NULL, "LDAC" },
{ "AIF Capture", NULL, "RDAC" },
};
static int rt9120_codec_probe(struct snd_soc_component *comp)
{
struct rt9120_data *data = snd_soc_component_get_drvdata(comp);
snd_soc_component_init_regmap(comp, data->regmap);
pm_runtime_get_sync(comp->dev);
if (data->chip_idx == CHIP_IDX_RT9120S) {
snd_soc_component_write(comp, RT9120_REG_INTERCFG, 0xde);
snd_soc_component_write(comp, RT9120_REG_INTERNAL0, 0x66);
} else
snd_soc_component_write(comp, RT9120_REG_INTERNAL0, 0x04);
pm_runtime_mark_last_busy(comp->dev);
pm_runtime_put(comp->dev);
return 0;
}
static int rt9120_codec_suspend(struct snd_soc_component *comp)
{
return pm_runtime_force_suspend(comp->dev);
}
static int rt9120_codec_resume(struct snd_soc_component *comp)
{
return pm_runtime_force_resume(comp->dev);
}
static const struct snd_soc_component_driver rt9120_component_driver = {
.probe = rt9120_codec_probe,
.suspend = rt9120_codec_suspend,
.resume = rt9120_codec_resume,
.controls = rt9120_snd_controls,
.num_controls = ARRAY_SIZE(rt9120_snd_controls),
.dapm_widgets = rt9120_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(rt9120_dapm_widgets),
.dapm_routes = rt9120_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(rt9120_dapm_routes),
.endianness = 1,
};
static int rt9120_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *comp = dai->component;
unsigned int format;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
format = RT9120_CFG_FMT_I2S;
break;
case SND_SOC_DAIFMT_LEFT_J:
format = RT9120_CFG_FMT_LEFTJ;
break;
case SND_SOC_DAIFMT_RIGHT_J:
format = RT9120_CFG_FMT_RIGHTJ;
break;
case SND_SOC_DAIFMT_DSP_A:
format = RT9120_CFG_FMT_DSPA;
break;
case SND_SOC_DAIFMT_DSP_B:
format = RT9120_CFG_FMT_DSPB;
break;
default:
dev_err(dai->dev, "Unknown dai format\n");
return -EINVAL;
}
snd_soc_component_update_bits(comp, RT9120_REG_I2SFMT,
RT9120_I2SFMT_MASK,
format << RT9120_I2SFMT_SHIFT);
return 0;
}
static int rt9120_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *param,
struct snd_soc_dai *dai)
{
struct snd_soc_component *comp = dai->component;
unsigned int param_width, param_slot_width, auto_sync;
int width, fs;
switch (width = params_width(param)) {
case 16:
param_width = RT9120_CFG_AUDBIT_16;
break;
case 20:
param_width = RT9120_CFG_AUDBIT_20;
break;
case 24:
case 32:
param_width = RT9120_CFG_AUDBIT_24;
break;
default:
dev_err(dai->dev, "Unsupported data width [%d]\n", width);
return -EINVAL;
}
snd_soc_component_update_bits(comp, RT9120_REG_I2SFMT,
RT9120_AUDBIT_MASK, param_width);
switch (width = params_physical_width(param)) {
case 16:
param_slot_width = RT9120_CFG_WORDLEN_16;
break;
case 24:
param_slot_width = RT9120_CFG_WORDLEN_24;
break;
case 32:
param_slot_width = RT9120_CFG_WORDLEN_32;
break;
default:
dev_err(dai->dev, "Unsupported slot width [%d]\n", width);
return -EINVAL;
}
snd_soc_component_update_bits(comp, RT9120_REG_I2SWL,
RT9120_AUDWL_MASK, param_slot_width);
fs = width * params_channels(param);
if (fs % 48 == 0)
auto_sync = 0;
else
auto_sync = RT9120_AUTOSYNC_MASK;
snd_soc_component_update_bits(comp, RT9120_REG_DIGCFG,
RT9120_AUTOSYNC_MASK, auto_sync);
return 0;
}
static const struct snd_soc_dai_ops rt9120_dai_ops = {
.set_fmt = rt9120_set_fmt,
.hw_params = rt9120_hw_params,
};
static struct snd_soc_dai_driver rt9120_dai = {
.name = "rt9120_aif",
.playback = {
.stream_name = "AIF Playback",
.rates = RT9120_RATES_MASK,
.formats = RT9120_FMTS_MASK,
.rate_max = 192000,
.rate_min = 8000,
.channels_min = 1,
.channels_max = 2,
},
.capture = {
.stream_name = "AIF Capture",
.rates = RT9120_RATES_MASK,
.formats = RT9120_FMTS_MASK,
.rate_max = 192000,
.rate_min = 8000,
.channels_min = 1,
.channels_max = 2,
},
.ops = &rt9120_dai_ops,
.symmetric_rate = 1,
.symmetric_sample_bits = 1,
};
static const struct regmap_range rt9120_rd_yes_ranges[] = {
regmap_reg_range(0x00, 0x0C),
regmap_reg_range(0x10, 0x15),
regmap_reg_range(0x20, 0x27),
regmap_reg_range(0x30, 0x38),
regmap_reg_range(0x3A, 0x40),
regmap_reg_range(0x63, 0x63),
regmap_reg_range(0x65, 0x65),
regmap_reg_range(0x69, 0x69),
regmap_reg_range(0x6C, 0x6C),
regmap_reg_range(0xF8, 0xF8)
};
static const struct regmap_access_table rt9120_rd_table = {
.yes_ranges = rt9120_rd_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(rt9120_rd_yes_ranges),
};
static const struct regmap_range rt9120_wr_yes_ranges[] = {
regmap_reg_range(0x00, 0x00),
regmap_reg_range(0x02, 0x0A),
regmap_reg_range(0x10, 0x15),
regmap_reg_range(0x20, 0x27),
regmap_reg_range(0x30, 0x38),
regmap_reg_range(0x3A, 0x3D),
regmap_reg_range(0x40, 0x40),
regmap_reg_range(0x63, 0x63),
regmap_reg_range(0x65, 0x65),
regmap_reg_range(0x69, 0x69),
regmap_reg_range(0x6C, 0x6C),
regmap_reg_range(0xF8, 0xF8)
};
static const struct regmap_access_table rt9120_wr_table = {
.yes_ranges = rt9120_wr_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(rt9120_wr_yes_ranges),
};
static bool rt9120_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x00 ... 0x01:
case 0x10:
case 0x30 ... 0x40:
return true;
default:
return false;
}
}
static int rt9120_get_reg_size(unsigned int reg)
{
switch (reg) {
case 0x00:
case 0x20 ... 0x27:
return 2;
case 0x30 ... 0x3D:
return 3;
case 0x3E ... 0x3F:
return 4;
default:
return 1;
}
}
static int rt9120_reg_read(void *context, unsigned int reg, unsigned int *val)
{
struct rt9120_data *data = context;
struct i2c_client *i2c = to_i2c_client(data->dev);
int size = rt9120_get_reg_size(reg);
u8 raw[4] = {0};
int ret;
ret = i2c_smbus_read_i2c_block_data(i2c, reg, size, raw);
if (ret < 0)
return ret;
else if (ret != size)
return -EIO;
switch (size) {
case 4:
*val = be32_to_cpup((__be32 *)raw);
break;
case 3:
*val = raw[0] << 16 | raw[1] << 8 | raw[2];
break;
case 2:
*val = be16_to_cpup((__be16 *)raw);
break;
default:
*val = raw[0];
}
return 0;
}
static int rt9120_reg_write(void *context, unsigned int reg, unsigned int val)
{
struct rt9120_data *data = context;
struct i2c_client *i2c = to_i2c_client(data->dev);
int size = rt9120_get_reg_size(reg);
__be32 be32_val;
u8 *rawp = (u8 *)&be32_val;
int offs = 4 - size;
be32_val = cpu_to_be32(val);
return i2c_smbus_write_i2c_block_data(i2c, reg, size, rawp + offs);
}
static const struct reg_default rt9120_reg_defaults[] = {
{ .reg = 0x02, .def = 0x02 },
{ .reg = 0x03, .def = 0xf2 },
{ .reg = 0x04, .def = 0x01 },
{ .reg = 0x05, .def = 0xc0 },
{ .reg = 0x06, .def = 0x28 },
{ .reg = 0x07, .def = 0x04 },
{ .reg = 0x08, .def = 0xff },
{ .reg = 0x09, .def = 0x01 },
{ .reg = 0x0a, .def = 0x01 },
{ .reg = 0x0b, .def = 0x00 },
{ .reg = 0x0c, .def = 0x04 },
{ .reg = 0x11, .def = 0x30 },
{ .reg = 0x12, .def = 0x08 },
{ .reg = 0x13, .def = 0x12 },
{ .reg = 0x14, .def = 0x09 },
{ .reg = 0x15, .def = 0x00 },
{ .reg = 0x20, .def = 0x7ff },
{ .reg = 0x21, .def = 0x180 },
{ .reg = 0x22, .def = 0x180 },
{ .reg = 0x23, .def = 0x00 },
{ .reg = 0x24, .def = 0x80 },
{ .reg = 0x25, .def = 0x180 },
{ .reg = 0x26, .def = 0x640 },
{ .reg = 0x27, .def = 0x180 },
{ .reg = 0x63, .def = 0x5e },
{ .reg = 0x65, .def = 0x66 },
{ .reg = 0x6c, .def = 0xe0 },
{ .reg = 0xf8, .def = 0x44 },
};
static const struct regmap_config rt9120_regmap_config = {
.reg_bits = 8,
.val_bits = 32,
.max_register = RT9120_REG_DIGCFG,
.reg_defaults = rt9120_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(rt9120_reg_defaults),
.cache_type = REGCACHE_RBTREE,
.reg_read = rt9120_reg_read,
.reg_write = rt9120_reg_write,
.volatile_reg = rt9120_volatile_reg,
.wr_table = &rt9120_wr_table,
.rd_table = &rt9120_rd_table,
};
static int rt9120_check_vendor_info(struct rt9120_data *data)
{
unsigned int devid;
int ret;
ret = regmap_read(data->regmap, RT9120_REG_DEVID, &devid);
if (ret)
return ret;
devid = FIELD_GET(RT9120_VID_MASK, devid);
switch (devid) {
case RT9120_VENDOR_ID:
data->chip_idx = CHIP_IDX_RT9120;
break;
case RT9120S_VENDOR_ID:
data->chip_idx = CHIP_IDX_RT9120S;
break;
default:
dev_err(data->dev, "DEVID not correct [0x%0x]\n", devid);
return -ENODEV;
}
return 0;
}
static int rt9120_do_register_reset(struct rt9120_data *data)
{
int ret;
ret = regmap_write(data->regmap, RT9120_REG_SWRESET,
RT9120_SWRST_MASK);
if (ret)
return ret;
msleep(RT9120_RESET_WAITMS);
return 0;
}
static int rt9120_probe(struct i2c_client *i2c)
{
struct rt9120_data *data;
struct regulator *dvdd_supply;
int dvdd_supply_volt, ret;
data = devm_kzalloc(&i2c->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->dev = &i2c->dev;
i2c_set_clientdata(i2c, data);
data->pwdnn_gpio = devm_gpiod_get_optional(&i2c->dev, "pwdnn",
GPIOD_OUT_HIGH);
if (IS_ERR(data->pwdnn_gpio)) {
dev_err(&i2c->dev, "Failed to initialize 'pwdnn' gpio\n");
return PTR_ERR(data->pwdnn_gpio);
} else if (data->pwdnn_gpio) {
dev_dbg(&i2c->dev, "'pwdnn' from low to high, wait chip on\n");
msleep(RT9120_CHIPON_WAITMS);
}
data->regmap = devm_regmap_init(&i2c->dev, NULL, data,
&rt9120_regmap_config);
if (IS_ERR(data->regmap)) {
ret = PTR_ERR(data->regmap);
dev_err(&i2c->dev, "Failed to init regmap [%d]\n", ret);
return ret;
}
ret = rt9120_check_vendor_info(data);
if (ret) {
dev_err(&i2c->dev, "Failed to check vendor info\n");
return ret;
}
ret = rt9120_do_register_reset(data);
if (ret) {
dev_err(&i2c->dev, "Failed to do register reset\n");
return ret;
}
dvdd_supply = devm_regulator_get(&i2c->dev, "dvdd");
if (IS_ERR(dvdd_supply)) {
dev_err(&i2c->dev, "No dvdd regulator found\n");
return PTR_ERR(dvdd_supply);
}
dvdd_supply_volt = regulator_get_voltage(dvdd_supply);
if (dvdd_supply_volt <= RT9120_LVAPP_THRESUV) {
dev_dbg(&i2c->dev, "dvdd low voltage design\n");
ret = regmap_update_bits(data->regmap, RT9120_REG_UVPOPT,
RT9120_DVDD_UVSEL_MASK, 0);
if (ret) {
dev_err(&i2c->dev, "Failed to config dvdd uvsel\n");
return ret;
}
}
pm_runtime_set_autosuspend_delay(&i2c->dev, 1000);
pm_runtime_use_autosuspend(&i2c->dev);
pm_runtime_set_active(&i2c->dev);
pm_runtime_mark_last_busy(&i2c->dev);
pm_runtime_enable(&i2c->dev);
return devm_snd_soc_register_component(&i2c->dev,
&rt9120_component_driver,
&rt9120_dai, 1);
}
static void rt9120_remove(struct i2c_client *i2c)
{
pm_runtime_disable(&i2c->dev);
pm_runtime_set_suspended(&i2c->dev);
}
static int rt9120_runtime_suspend(struct device *dev)
{
struct rt9120_data *data = dev_get_drvdata(dev);
if (data->pwdnn_gpio) {
regcache_cache_only(data->regmap, true);
regcache_mark_dirty(data->regmap);
gpiod_set_value(data->pwdnn_gpio, 0);
}
return 0;
}
static int rt9120_runtime_resume(struct device *dev)
{
struct rt9120_data *data = dev_get_drvdata(dev);
if (data->pwdnn_gpio) {
gpiod_set_value(data->pwdnn_gpio, 1);
msleep(RT9120_CHIPON_WAITMS);
regcache_cache_only(data->regmap, false);
regcache_sync(data->regmap);
}
return 0;
}
static const struct dev_pm_ops rt9120_pm_ops = {
RUNTIME_PM_OPS(rt9120_runtime_suspend, rt9120_runtime_resume, NULL)
};
static const struct of_device_id __maybe_unused rt9120_device_table[] = {
{ .compatible = "richtek,rt9120", },
{ }
};
MODULE_DEVICE_TABLE(of, rt9120_device_table);
static struct i2c_driver rt9120_driver = {
.driver = {
.name = "rt9120",
.of_match_table = rt9120_device_table,
.pm = pm_ptr(&rt9120_pm_ops),
},
.probe = rt9120_probe,
.remove = rt9120_remove,
};
module_i2c_driver(rt9120_driver);
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
MODULE_DESCRIPTION("RT9120 Audio Amplifier Driver");
MODULE_LICENSE("GPL");
