/*
* TAS571x amplifier audio driver
*
* Copyright (C) 2015 Google, Inc.
* Copyright (c) 2013 Daniel Mack <zonque@gmail.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/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/stddef.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "tas571x.h"
#define TAS571X_MAX_SUPPLIES 6
struct tas571x_chip {
const char *const *supply_names;
int num_supply_names;
const struct snd_kcontrol_new *controls;
int num_controls;
const struct regmap_config *regmap_config;
int vol_reg_size;
};
struct tas571x_private {
const struct tas571x_chip *chip;
struct regmap *regmap;
struct regulator_bulk_data supplies[TAS571X_MAX_SUPPLIES];
struct clk *mclk;
unsigned int format;
struct gpio_desc *reset_gpio;
struct gpio_desc *pdn_gpio;
struct snd_soc_codec_driver codec_driver;
};
static int tas571x_register_size(struct tas571x_private *priv, unsigned int reg)
{
switch (reg) {
case TAS571X_MVOL_REG:
case TAS571X_CH1_VOL_REG:
case TAS571X_CH2_VOL_REG:
return priv->chip->vol_reg_size;
default:
return 1;
}
}
static int tas571x_reg_write(void *context, unsigned int reg,
unsigned int value)
{
struct i2c_client *client = context;
struct tas571x_private *priv = i2c_get_clientdata(client);
unsigned int i, size;
uint8_t buf[5];
int ret;
size = tas571x_register_size(priv, reg);
buf[0] = reg;
for (i = size; i >= 1; --i) {
buf[i] = value;
value >>= 8;
}
ret = i2c_master_send(client, buf, size + 1);
if (ret == size + 1)
return 0;
else if (ret < 0)
return ret;
else
return -EIO;
}
static int tas571x_reg_read(void *context, unsigned int reg,
unsigned int *value)
{
struct i2c_client *client = context;
struct tas571x_private *priv = i2c_get_clientdata(client);
uint8_t send_buf, recv_buf[4];
struct i2c_msg msgs[2];
unsigned int size;
unsigned int i;
int ret;
size = tas571x_register_size(priv, reg);
send_buf = reg;
msgs[0].addr = client->addr;
msgs[0].len = sizeof(send_buf);
msgs[0].buf = &send_buf;
msgs[0].flags = 0;
msgs[1].addr = client->addr;
msgs[1].len = size;
msgs[1].buf = recv_buf;
msgs[1].flags = I2C_M_RD;
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret < 0)
return ret;
else if (ret != ARRAY_SIZE(msgs))
return -EIO;
*value = 0;
for (i = 0; i < size; i++) {
*value <<= 8;
*value |= recv_buf[i];
}
return 0;
}
static int tas571x_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format)
{
struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec);
priv->format = format;
return 0;
}
static int tas571x_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec);
u32 val;
switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
val = 0x00;
break;
case SND_SOC_DAIFMT_I2S:
val = 0x03;
break;
case SND_SOC_DAIFMT_LEFT_J:
val = 0x06;
break;
default:
return -EINVAL;
}
if (params_width(params) >= 24)
val += 2;
else if (params_width(params) >= 20)
val += 1;
return regmap_update_bits(priv->regmap, TAS571X_SDI_REG,
TAS571X_SDI_FMT_MASK, val);
}
static int tas571x_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct tas571x_private *priv = snd_soc_codec_get_drvdata(codec);
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
if (!IS_ERR(priv->mclk)) {
ret = clk_prepare_enable(priv->mclk);
if (ret) {
dev_err(codec->dev,
"Failed to enable master clock: %d\n",
ret);
return ret;
}
}
gpiod_set_value(priv->pdn_gpio, 0);
usleep_range(5000, 6000);
regcache_cache_only(priv->regmap, false);
ret = regcache_sync(priv->regmap);
if (ret)
return ret;
}
break;
case SND_SOC_BIAS_OFF:
regcache_cache_only(priv->regmap, true);
gpiod_set_value(priv->pdn_gpio, 1);
if (!IS_ERR(priv->mclk))
clk_disable_unprepare(priv->mclk);
break;
}
return 0;
}
static const struct snd_soc_dai_ops tas571x_dai_ops = {
.set_fmt = tas571x_set_dai_fmt,
.hw_params = tas571x_hw_params,
};
static const char *const tas5711_supply_names[] = {
"AVDD",
"DVDD",
"PVDD_A",
"PVDD_B",
"PVDD_C",
"PVDD_D",
};
static const DECLARE_TLV_DB_SCALE(tas5711_volume_tlv, -10350, 50, 1);
static const struct snd_kcontrol_new tas5711_controls[] = {
SOC_SINGLE_TLV("Master Volume",
TAS571X_MVOL_REG,
0, 0xff, 1, tas5711_volume_tlv),
SOC_DOUBLE_R_TLV("Speaker Volume",
TAS571X_CH1_VOL_REG,
TAS571X_CH2_VOL_REG,
0, 0xff, 1, tas5711_volume_tlv),
SOC_DOUBLE("Speaker Switch",
TAS571X_SOFT_MUTE_REG,
TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,
1, 1),
};
static const struct reg_default tas5711_reg_defaults[] = {
{ 0x04, 0x05 },
{ 0x05, 0x40 },
{ 0x06, 0x00 },
{ 0x07, 0xff },
{ 0x08, 0x30 },
{ 0x09, 0x30 },
{ 0x1b, 0x82 },
};
static const struct regmap_config tas5711_regmap_config = {
.reg_bits = 8,
.val_bits = 32,
.max_register = 0xff,
.reg_read = tas571x_reg_read,
.reg_write = tas571x_reg_write,
.reg_defaults = tas5711_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(tas5711_reg_defaults),
.cache_type = REGCACHE_RBTREE,
};
static const struct tas571x_chip tas5711_chip = {
.supply_names = tas5711_supply_names,
.num_supply_names = ARRAY_SIZE(tas5711_supply_names),
.controls = tas5711_controls,
.num_controls = ARRAY_SIZE(tas5711_controls),
.regmap_config = &tas5711_regmap_config,
.vol_reg_size = 1,
};
static const char *const tas5717_supply_names[] = {
"AVDD",
"DVDD",
"HPVDD",
"PVDD_AB",
"PVDD_CD",
};
static const DECLARE_TLV_DB_SCALE(tas5717_volume_tlv, -10375, 25, 0);
static const struct snd_kcontrol_new tas5717_controls[] = {
/* MVOL LSB is ignored - see comments in tas571x_i2c_probe() */
SOC_SINGLE_TLV("Master Volume",
TAS571X_MVOL_REG, 1, 0x1ff, 1,
tas5717_volume_tlv),
SOC_DOUBLE_R_TLV("Speaker Volume",
TAS571X_CH1_VOL_REG, TAS571X_CH2_VOL_REG,
1, 0x1ff, 1, tas5717_volume_tlv),
SOC_DOUBLE("Speaker Switch",
TAS571X_SOFT_MUTE_REG,
TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,
1, 1),
};
static const struct reg_default tas5717_reg_defaults[] = {
{ 0x04, 0x05 },
{ 0x05, 0x40 },
{ 0x06, 0x00 },
{ 0x07, 0x03ff },
{ 0x08, 0x00c0 },
{ 0x09, 0x00c0 },
{ 0x1b, 0x82 },
};
static const struct regmap_config tas5717_regmap_config = {
.reg_bits = 8,
.val_bits = 32,
.max_register = 0xff,
.reg_read = tas571x_reg_read,
.reg_write = tas571x_reg_write,
.reg_defaults = tas5717_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(tas5717_reg_defaults),
.cache_type = REGCACHE_RBTREE,
};
/* This entry is reused for tas5719 as the software interface is identical. */
static const struct tas571x_chip tas5717_chip = {
.supply_names = tas5717_supply_names,
.num_supply_names = ARRAY_SIZE(tas5717_supply_names),
.controls = tas5717_controls,
.num_controls = ARRAY_SIZE(tas5717_controls),
.regmap_config = &tas5717_regmap_config,
.vol_reg_size = 2,
};
static const struct snd_soc_dapm_widget tas571x_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("OUT_A"),
SND_SOC_DAPM_OUTPUT("OUT_B"),
SND_SOC_DAPM_OUTPUT("OUT_C"),
SND_SOC_DAPM_OUTPUT("OUT_D"),
};
static const struct snd_soc_dapm_route tas571x_dapm_routes[] = {
{ "DACL", NULL, "Playback" },
{ "DACR", NULL, "Playback" },
{ "OUT_A", NULL, "DACL" },
{ "OUT_B", NULL, "DACL" },
{ "OUT_C", NULL, "DACR" },
{ "OUT_D", NULL, "DACR" },
};
static const struct snd_soc_codec_driver tas571x_codec = {
.set_bias_level = tas571x_set_bias_level,
.idle_bias_off = true,
.dapm_widgets = tas571x_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(tas571x_dapm_widgets),
.dapm_routes = tas571x_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(tas571x_dapm_routes),
};
static struct snd_soc_dai_driver tas571x_dai = {
.name = "tas571x-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S32_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &tas571x_dai_ops,
};
static const struct of_device_id tas571x_of_match[];
static int tas571x_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tas571x_private *priv;
struct device *dev = &client->dev;
const struct of_device_id *of_id;
int i, ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
i2c_set_clientdata(client, priv);
of_id = of_match_device(tas571x_of_match, dev);
if (!of_id) {
dev_err(dev, "Unknown device type\n");
return -EINVAL;
}
priv->chip = of_id->data;
priv->mclk = devm_clk_get(dev, "mclk");
if (IS_ERR(priv->mclk) && PTR_ERR(priv->mclk) != -ENOENT) {
dev_err(dev, "Failed to request mclk: %ld\n",
PTR_ERR(priv->mclk));
return PTR_ERR(priv->mclk);
}
BUG_ON(priv->chip->num_supply_names > TAS571X_MAX_SUPPLIES);
for (i = 0; i < priv->chip->num_supply_names; i++)
priv->supplies[i].supply = priv->chip->supply_names[i];
ret = devm_regulator_bulk_get(dev, priv->chip->num_supply_names,
priv->supplies);
if (ret) {
dev_err(dev, "Failed to get supplies: %d\n", ret);
return ret;
}
ret = regulator_bulk_enable(priv->chip->num_supply_names,
priv->supplies);
if (ret) {
dev_err(dev, "Failed to enable supplies: %d\n", ret);
return ret;
}
priv->regmap = devm_regmap_init(dev, NULL, client,
priv->chip->regmap_config);
if (IS_ERR(priv->regmap))
return PTR_ERR(priv->regmap);
priv->pdn_gpio = devm_gpiod_get_optional(dev, "pdn", GPIOD_OUT_LOW);
if (IS_ERR(priv->pdn_gpio)) {
dev_err(dev, "error requesting pdn_gpio: %ld\n",
PTR_ERR(priv->pdn_gpio));
return PTR_ERR(priv->pdn_gpio);
}
priv->reset_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(priv->reset_gpio)) {
dev_err(dev, "error requesting reset_gpio: %ld\n",
PTR_ERR(priv->reset_gpio));
return PTR_ERR(priv->reset_gpio);
} else if (priv->reset_gpio) {
/* pulse the active low reset line for ~100us */
usleep_range(100, 200);
gpiod_set_value(priv->reset_gpio, 0);
usleep_range(12000, 20000);
}
ret = regmap_write(priv->regmap, TAS571X_OSC_TRIM_REG, 0);
if (ret)
return ret;
ret = regmap_update_bits(priv->regmap, TAS571X_SYS_CTRL_2_REG,
TAS571X_SYS_CTRL_2_SDN_MASK, 0);
if (ret)
return ret;
memcpy(&priv->codec_driver, &tas571x_codec, sizeof(priv->codec_driver));
priv->codec_driver.controls = priv->chip->controls;
priv->codec_driver.num_controls = priv->chip->num_controls;
if (priv->chip->vol_reg_size == 2) {
/*
* The master volume defaults to 0x3ff (mute), but we ignore
* (zero) the LSB because the hardware step size is 0.125 dB
* and TLV_DB_SCALE_ITEM has a resolution of 0.01 dB.
*/
ret = regmap_update_bits(priv->regmap, TAS571X_MVOL_REG, 1, 0);
if (ret)
return ret;
}
regcache_cache_only(priv->regmap, true);
gpiod_set_value(priv->pdn_gpio, 1);
return snd_soc_register_codec(&client->dev, &priv->codec_driver,
&tas571x_dai, 1);
}
static int tas571x_i2c_remove(struct i2c_client *client)
{
struct tas571x_private *priv = i2c_get_clientdata(client);
snd_soc_unregister_codec(&client->dev);
regulator_bulk_disable(priv->chip->num_supply_names, priv->supplies);
return 0;
}
static const struct of_device_id tas571x_of_match[] = {
{ .compatible = "ti,tas5711", .data = &tas5711_chip, },
{ .compatible = "ti,tas5717", .data = &tas5717_chip, },
{ .compatible = "ti,tas5719", .data = &tas5717_chip, },
{ }
};
MODULE_DEVICE_TABLE(of, tas571x_of_match);
static const struct i2c_device_id tas571x_i2c_id[] = {
{ "tas5711", 0 },
{ "tas5717", 0 },
{ "tas5719", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tas571x_i2c_id);
static struct i2c_driver tas571x_i2c_driver = {
.driver = {
.name = "tas571x",
.of_match_table = of_match_ptr(tas571x_of_match),
},
.probe = tas571x_i2c_probe,
.remove = tas571x_i2c_remove,
.id_table = tas571x_i2c_id,
};
module_i2c_driver(tas571x_i2c_driver);
MODULE_DESCRIPTION("ASoC TAS571x driver");
MODULE_AUTHOR("Kevin Cernekee <cernekee@chromium.org>");
MODULE_LICENSE("GPL");
