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linux/sound/soc/codecs/mt6660.c
Jeff Chang f289e55c6e
ASoC: Add MediaTek MT6660 Speaker Amp Driver 
The MT6660 is a boosted BTL class-D amplifier with V/I sensing.
A built-in DC-DC step-up converter is used to provide efficient
power for class-D amplifier with multi-level class-G operation.
The digital audio interface supports I2S, left-justified,
right-justified, TDM and DSP A/B format for audio in with a data
out used for chip information like voltage sense and current
sense, which are able to be monitored via DATAO through proper

Signed-off-by: Jeff Chang <jeff_chang@richtek.com>
Link: https://lore.kernel.org/r/1579153597-23286-1-git-send-email-richtek.jeff.chang@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-01-21 18:26:41 +00:00

510 lines
13 KiB
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// SPDX-License-Identifier: GPL-2.0 //
// Copyright (c) 2019 MediaTek Inc.
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/debugfs.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/pcm_params.h>
#include "mt6660.h"
struct reg_size_table {
u32 addr;
u8 size;
};
static const struct reg_size_table mt6660_reg_size_table[] = {
{ MT6660_REG_HPF1_COEF, 4 },
{ MT6660_REG_HPF2_COEF, 4 },
{ MT6660_REG_TDM_CFG3, 2 },
{ MT6660_REG_RESV17, 2 },
{ MT6660_REG_RESV23, 2 },
{ MT6660_REG_SIGMAX, 2 },
{ MT6660_REG_DEVID, 2 },
{ MT6660_REG_HCLIP_CTRL, 2 },
{ MT6660_REG_DA_GAIN, 2 },
};
static int mt6660_get_reg_size(uint32_t addr)
{
int i;
for (i = 0; i < ARRAY_SIZE(mt6660_reg_size_table); i++) {
if (mt6660_reg_size_table[i].addr == addr)
return mt6660_reg_size_table[i].size;
}
return 1;
}
static int mt6660_reg_write(void *context, unsigned int reg, unsigned int val)
{
struct mt6660_chip *chip = context;
int size = mt6660_get_reg_size(reg);
u8 reg_data[4];
int i, ret;
for (i = 0; i < size; i++)
reg_data[size - i - 1] = (val >> (8 * i)) & 0xff;
ret = i2c_smbus_write_i2c_block_data(chip->i2c, reg, size, reg_data);
return ret;
}
static int mt6660_reg_read(void *context, unsigned int reg, unsigned int *val)
{
struct mt6660_chip *chip = context;
int size = mt6660_get_reg_size(reg);
int i, ret;
u8 data[4];
u32 reg_data = 0;
ret = i2c_smbus_read_i2c_block_data(chip->i2c, reg, size, data);
if (ret < 0)
return ret;
for (i = 0; i < size; i++) {
reg_data <<= 8;
reg_data |= data[i];
}
*val = reg_data;
return 0;
}
static const struct regmap_config mt6660_regmap_config = {
.reg_bits = 8,
.val_bits = 32,
.reg_write = mt6660_reg_write,
.reg_read = mt6660_reg_read,
};
static int mt6660_codec_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
if (event == SND_SOC_DAPM_POST_PMU)
usleep_range(1000, 1100);
return 0;
}
static int mt6660_codec_classd_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component =
snd_soc_dapm_to_component(w->dapm);
int ret;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
dev_dbg(component->dev,
"%s: before classd turn on\n", __func__);
/* config to adaptive mode */
ret = snd_soc_component_update_bits(component,
MT6660_REG_BST_CTRL, 0x03, 0x03);
if (ret < 0) {
dev_err(component->dev, "config mode adaptive fail\n");
return ret;
}
break;
case SND_SOC_DAPM_POST_PMU:
/* voltage sensing enable */
ret = snd_soc_component_update_bits(component,
MT6660_REG_RESV7, 0x04, 0x04);
if (ret < 0) {
dev_err(component->dev,
"enable voltage sensing fail\n");
return ret;
}
dev_dbg(component->dev, "Amp on\n");
break;
case SND_SOC_DAPM_PRE_PMD:
dev_dbg(component->dev, "Amp off\n");
/* voltage sensing disable */
ret = snd_soc_component_update_bits(component,
MT6660_REG_RESV7, 0x04, 0x00);
if (ret < 0) {
dev_err(component->dev,
"disable voltage sensing fail\n");
return ret;
}
/* pop-noise improvement 1 */
ret = snd_soc_component_update_bits(component,
MT6660_REG_RESV10, 0x10, 0x10);
if (ret < 0) {
dev_err(component->dev,
"pop-noise improvement 1 fail\n");
return ret;
}
break;
case SND_SOC_DAPM_POST_PMD:
dev_dbg(component->dev,
"%s: after classd turn off\n", __func__);
/* pop-noise improvement 2 */
ret = snd_soc_component_update_bits(component,
MT6660_REG_RESV10, 0x10, 0x00);
if (ret < 0) {
dev_err(component->dev,
"pop-noise improvement 2 fail\n");
return ret;
}
/* config to off mode */
ret = snd_soc_component_update_bits(component,
MT6660_REG_BST_CTRL, 0x03, 0x00);
if (ret < 0) {
dev_err(component->dev, "config mode off fail\n");
return ret;
}
break;
}
return 0;
}
static const struct snd_soc_dapm_widget mt6660_component_dapm_widgets[] = {
SND_SOC_DAPM_DAC_E("DAC", NULL, MT6660_REG_PLL_CFG1,
0, 1, mt6660_codec_dac_event, SND_SOC_DAPM_POST_PMU),
SND_SOC_DAPM_ADC("VI ADC", NULL, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_PGA("PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_OUT_DRV_E("ClassD", MT6660_REG_SYSTEM_CTRL, 2, 0,
NULL, 0, mt6660_codec_classd_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_OUTPUT("OUTP"),
SND_SOC_DAPM_OUTPUT("OUTN"),
};
static const struct snd_soc_dapm_route mt6660_component_dapm_routes[] = {
{ "DAC", NULL, "aif_playback" },
{ "PGA", NULL, "DAC" },
{ "ClassD", NULL, "PGA" },
{ "OUTP", NULL, "ClassD" },
{ "OUTN", NULL, "ClassD" },
{ "VI ADC", NULL, "ClassD" },
{ "aif_capture", NULL, "VI ADC" },
};
static int mt6660_component_get_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component =
snd_soc_kcontrol_component(kcontrol);
struct mt6660_chip *chip = (struct mt6660_chip *)
snd_soc_component_get_drvdata(component);
ucontrol->value.integer.value[0] = chip->chip_rev & 0x0f;
return 0;
}
static const DECLARE_TLV_DB_SCALE(vol_ctl_tlv, -1155, 5, 0);
static const struct snd_kcontrol_new mt6660_component_snd_controls[] = {
SOC_SINGLE_TLV("Digital Volume", MT6660_REG_VOL_CTRL, 0, 255,
1, vol_ctl_tlv),
SOC_SINGLE("Hard Clip Switch", MT6660_REG_HCLIP_CTRL, 8, 1, 0),
SOC_SINGLE("Clip Switch", MT6660_REG_SPS_CTRL, 0, 1, 0),
SOC_SINGLE("Boost Mode", MT6660_REG_BST_CTRL, 0, 3, 0),
SOC_SINGLE("DRE Switch", MT6660_REG_DRE_CTRL, 0, 1, 0),
SOC_SINGLE("DC Protect Switch", MT6660_REG_DC_PROTECT_CTRL, 3, 1, 0),
SOC_SINGLE("Data Output Left Channel Selection",
MT6660_REG_DATAO_SEL, 3, 7, 0),
SOC_SINGLE("Data Output Right Channel Selection",
MT6660_REG_DATAO_SEL, 0, 7, 0),
SOC_SINGLE_EXT("T0 SEL", MT6660_REG_CALI_T0, 0, 7, 0,
snd_soc_get_volsw, NULL),
SOC_SINGLE_EXT("Chip Rev", MT6660_REG_DEVID, 8, 15, 0,
mt6660_component_get_volsw, NULL),
};
static int _mt6660_chip_power_on(struct mt6660_chip *chip, int on_off)
{
return regmap_write_bits(chip->regmap, MT6660_REG_SYSTEM_CTRL,
0x01, on_off ? 0x00 : 0x01);
}
static int mt6660_component_probe(struct snd_soc_component *component)
{
struct mt6660_chip *chip = snd_soc_component_get_drvdata(component);
dev_dbg(component->dev, "%s\n", __func__);
snd_soc_component_init_regmap(component, chip->regmap);
return 0;
}
static void mt6660_component_remove(struct snd_soc_component *component)
{
dev_dbg(component->dev, "%s\n", __func__);
snd_soc_component_exit_regmap(component);
}
static const struct snd_soc_component_driver mt6660_component_driver = {
.probe = mt6660_component_probe,
.remove = mt6660_component_remove,
.controls = mt6660_component_snd_controls,
.num_controls = ARRAY_SIZE(mt6660_component_snd_controls),
.dapm_widgets = mt6660_component_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(mt6660_component_dapm_widgets),
.dapm_routes = mt6660_component_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(mt6660_component_dapm_routes),
.idle_bias_on = false, /* idle_bias_off = true */
};
static int mt6660_component_aif_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params, struct snd_soc_dai *dai)
{
int word_len = params_physical_width(hw_params);
int aud_bit = params_width(hw_params);
u16 reg_data = 0;
int ret;
dev_dbg(dai->dev, "%s: ++\n", __func__);
dev_dbg(dai->dev, "format: 0x%08x\n", params_format(hw_params));
dev_dbg(dai->dev, "rate: 0x%08x\n", params_rate(hw_params));
dev_dbg(dai->dev, "word_len: %d, aud_bit: %d\n", word_len, aud_bit);
if (word_len > 32 || word_len < 16) {
dev_err(dai->dev, "not supported word length\n");
return -ENOTSUPP;
}
switch (aud_bit) {
case 16:
reg_data = 3;
break;
case 18:
reg_data = 2;
break;
case 20:
reg_data = 1;
break;
case 24:
case 32:
reg_data = 0;
break;
default:
return -ENOTSUPP;
}
ret = snd_soc_component_update_bits(dai->component,
MT6660_REG_SERIAL_CFG1, 0xc0, (reg_data << 6));
if (ret < 0) {
dev_err(dai->dev, "config aud bit fail\n");
return ret;
}
ret = snd_soc_component_update_bits(dai->component,
MT6660_REG_TDM_CFG3, 0x3f0, word_len << 4);
if (ret < 0) {
dev_err(dai->dev, "config word len fail\n");
return ret;
}
dev_dbg(dai->dev, "%s: --\n", __func__);
return 0;
}
static const struct snd_soc_dai_ops mt6660_component_aif_ops = {
.hw_params = mt6660_component_aif_hw_params,
};
#define STUB_RATES SNDRV_PCM_RATE_8000_192000
#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_U16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_U24_LE | \
SNDRV_PCM_FMTBIT_S32_LE | \
SNDRV_PCM_FMTBIT_U32_LE)
static struct snd_soc_dai_driver mt6660_codec_dai = {
.name = "mt6660-aif",
.playback = {
.stream_name = "aif_playback",
.channels_min = 1,
.channels_max = 2,
.rates = STUB_RATES,
.formats = STUB_FORMATS,
},
.capture = {
.stream_name = "aif_capture",
.channels_min = 1,
.channels_max = 2,
.rates = STUB_RATES,
.formats = STUB_FORMATS,
},
/* dai properties */
.symmetric_rates = 1,
.symmetric_channels = 1,
.symmetric_samplebits = 1,
/* dai operations */
.ops = &mt6660_component_aif_ops,
};
static int _mt6660_chip_id_check(struct mt6660_chip *chip)
{
int ret;
unsigned int val;
ret = regmap_read(chip->regmap, MT6660_REG_DEVID, &val);
if (ret < 0)
return ret;
val &= 0x0ff0;
if (val != 0x00e0 && val != 0x01e0) {
dev_err(chip->dev, "%s id(%x) not match\n", __func__, val);
return -ENODEV;
}
return 0;
}
static int _mt6660_chip_sw_reset(struct mt6660_chip *chip)
{
int ret;
/* turn on main pll first, then trigger reset */
ret = regmap_write(chip->regmap, MT6660_REG_SYSTEM_CTRL, 0x00);
if (ret < 0)
return ret;
ret = regmap_write(chip->regmap, MT6660_REG_SYSTEM_CTRL, 0x80);
if (ret < 0)
return ret;
msleep(30);
return 0;
}
static int _mt6660_read_chip_revision(struct mt6660_chip *chip)
{
int ret;
unsigned int val;
ret = regmap_read(chip->regmap, MT6660_REG_DEVID, &val);
if (ret < 0) {
dev_err(chip->dev, "get chip revision fail\n");
return ret;
}
chip->chip_rev = val&0xff;
dev_info(chip->dev, "%s chip_rev = %x\n", __func__, chip->chip_rev);
return 0;
}
static int mt6660_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mt6660_chip *chip = NULL;
int ret;
dev_dbg(&client->dev, "%s\n", __func__);
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->i2c = client;
chip->dev = &client->dev;
mutex_init(&chip->io_lock);
i2c_set_clientdata(client, chip);
chip->regmap = devm_regmap_init(&client->dev,
NULL, chip, &mt6660_regmap_config);
if (IS_ERR(chip->regmap)) {
ret = PTR_ERR(chip->regmap);
dev_err(&client->dev, "failed to initialise regmap: %d\n", ret);
return ret;
}
/* chip reset first */
ret = _mt6660_chip_sw_reset(chip);
if (ret < 0) {
dev_err(chip->dev, "chip reset fail\n");
goto probe_fail;
}
/* chip power on */
ret = _mt6660_chip_power_on(chip, 1);
if (ret < 0) {
dev_err(chip->dev, "chip power on 2 fail\n");
goto probe_fail;
}
/* chip devid check */
ret = _mt6660_chip_id_check(chip);
if (ret < 0) {
dev_err(chip->dev, "chip id check fail\n");
goto probe_fail;
}
/* chip revision get */
ret = _mt6660_read_chip_revision(chip);
if (ret < 0) {
dev_err(chip->dev, "read chip revision fail\n");
goto probe_fail;
}
pm_runtime_set_active(chip->dev);
pm_runtime_enable(chip->dev);
ret = devm_snd_soc_register_component(chip->dev,
&mt6660_component_driver,
&mt6660_codec_dai, 1);
return ret;
probe_fail:
_mt6660_chip_power_on(chip, 0);
mutex_destroy(&chip->io_lock);
return ret;
}
static int mt6660_i2c_remove(struct i2c_client *client)
{
struct mt6660_chip *chip = i2c_get_clientdata(client);
pm_runtime_disable(chip->dev);
pm_runtime_set_suspended(chip->dev);
mutex_destroy(&chip->io_lock);
return 0;
}
static int __maybe_unused mt6660_i2c_runtime_suspend(struct device *dev)
{
struct mt6660_chip *chip = dev_get_drvdata(dev);
dev_dbg(dev, "enter low power mode\n");
return regmap_update_bits(chip->regmap,
MT6660_REG_SYSTEM_CTRL, 0x01, 0x01);
}
static int __maybe_unused mt6660_i2c_runtime_resume(struct device *dev)
{
struct mt6660_chip *chip = dev_get_drvdata(dev);
dev_dbg(dev, "exit low power mode\n");
return regmap_update_bits(chip->regmap,
MT6660_REG_SYSTEM_CTRL, 0x01, 0x00);
}
static const struct dev_pm_ops mt6660_dev_pm_ops = {
SET_RUNTIME_PM_OPS(mt6660_i2c_runtime_suspend,
mt6660_i2c_runtime_resume, NULL)
};
static const struct of_device_id __maybe_unused mt6660_of_id[] = {
{ .compatible = "mediatek,mt6660",},
{},
};
MODULE_DEVICE_TABLE(of, mt6660_of_id);
static const struct i2c_device_id mt6660_i2c_id[] = {
{"mt6660", 0 },
{},
};
MODULE_DEVICE_TABLE(i2c, mt6660_i2c_id);
static struct i2c_driver mt6660_i2c_driver = {
.driver = {
.name = "mt6660",
.of_match_table = of_match_ptr(mt6660_of_id),
.pm = &mt6660_dev_pm_ops,
},
.probe = mt6660_i2c_probe,
.remove = mt6660_i2c_remove,
.id_table = mt6660_i2c_id,
};
module_i2c_driver(mt6660_i2c_driver);
MODULE_AUTHOR("Jeff Chang <jeff_chang@richtek.com>");
MODULE_DESCRIPTION("MT6660 SPKAMP Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.7_G");
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