// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#define BLOCK_EN 0x00
#define LORN_EN 0
#define LORP_EN 1
#define LOLN_EN 2
#define LOLP_EN 3
#define DACR_EN 4
#define DACL_EN 5
#define DACR_INV 20
#define DACL_INV 21
#define DACR_SRC 22
#define DACL_SRC 23
#define REFP_BUF_EN BIT(12)
#define BIAS_CURRENT_EN BIT(13)
#define VMID_GEN_FAST BIT(14)
#define VMID_GEN_EN BIT(15)
#define I2S_MODE BIT(30)
#define VOL_CTRL0 0x04
#define GAIN_H 31
#define GAIN_L 23
#define VOL_CTRL1 0x08
#define DAC_MONO 8
#define RAMP_RATE 10
#define VC_RAMP_MODE 12
#define MUTE_MODE 13
#define UNMUTE_MODE 14
#define DAC_SOFT_MUTE 15
#define DACR_VC 16
#define DACL_VC 24
#define LINEOUT_CFG 0x0c
#define LORN_POL 0
#define LORP_POL 4
#define LOLN_POL 8
#define LOLP_POL 12
#define POWER_CFG 0x10
struct t9015 {
struct clk *pclk;
struct regulator *avdd;
};
static int t9015_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component = dai->component;
unsigned int val;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
val = I2S_MODE;
break;
case SND_SOC_DAIFMT_CBS_CFS:
val = 0;
break;
default:
return -EINVAL;
}
snd_soc_component_update_bits(component, BLOCK_EN, I2S_MODE, val);
if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S) &&
((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_LEFT_J))
return -EINVAL;
return 0;
}
static const struct snd_soc_dai_ops t9015_dai_ops = {
.set_fmt = t9015_dai_set_fmt,
};
static struct snd_soc_dai_driver t9015_dai = {
.name = "t9015-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = (SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_LE |
SNDRV_PCM_FMTBIT_S24_LE),
},
.ops = &t9015_dai_ops,
};
static const DECLARE_TLV_DB_MINMAX_MUTE(dac_vol_tlv, -9525, 0);
static const char * const ramp_rate_txt[] = { "Fast", "Slow" };
static SOC_ENUM_SINGLE_DECL(ramp_rate_enum, VOL_CTRL1, RAMP_RATE,
ramp_rate_txt);
static const char * const dacr_in_txt[] = { "Right", "Left" };
static SOC_ENUM_SINGLE_DECL(dacr_in_enum, BLOCK_EN, DACR_SRC, dacr_in_txt);
static const char * const dacl_in_txt[] = { "Left", "Right" };
static SOC_ENUM_SINGLE_DECL(dacl_in_enum, BLOCK_EN, DACL_SRC, dacl_in_txt);
static const char * const mono_txt[] = { "Stereo", "Mono"};
static SOC_ENUM_SINGLE_DECL(mono_enum, VOL_CTRL1, DAC_MONO, mono_txt);
static const struct snd_kcontrol_new t9015_snd_controls[] = {
/* Volume Controls */
SOC_ENUM("Playback Channel Mode", mono_enum),
SOC_SINGLE("Playback Switch", VOL_CTRL1, DAC_SOFT_MUTE, 1, 1),
SOC_DOUBLE_TLV("Playback Volume", VOL_CTRL1, DACL_VC, DACR_VC,
0xff, 0, dac_vol_tlv),
/* Ramp Controls */
SOC_ENUM("Ramp Rate", ramp_rate_enum),
SOC_SINGLE("Volume Ramp Switch", VOL_CTRL1, VC_RAMP_MODE, 1, 0),
SOC_SINGLE("Mute Ramp Switch", VOL_CTRL1, MUTE_MODE, 1, 0),
SOC_SINGLE("Unmute Ramp Switch", VOL_CTRL1, UNMUTE_MODE, 1, 0),
};
static const struct snd_kcontrol_new t9015_right_dac_mux =
SOC_DAPM_ENUM("Right DAC Source", dacr_in_enum);
static const struct snd_kcontrol_new t9015_left_dac_mux =
SOC_DAPM_ENUM("Left DAC Source", dacl_in_enum);
static const struct snd_soc_dapm_widget t9015_dapm_widgets[] = {
SND_SOC_DAPM_AIF_IN("Right IN", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("Left IN", NULL, 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_MUX("Right DAC Sel", SND_SOC_NOPM, 0, 0,
&t9015_right_dac_mux),
SND_SOC_DAPM_MUX("Left DAC Sel", SND_SOC_NOPM, 0, 0,
&t9015_left_dac_mux),
SND_SOC_DAPM_DAC("Right DAC", NULL, BLOCK_EN, DACR_EN, 0),
SND_SOC_DAPM_DAC("Left DAC", NULL, BLOCK_EN, DACL_EN, 0),
SND_SOC_DAPM_OUT_DRV("Right- Driver", BLOCK_EN, LORN_EN, 0,
NULL, 0),
SND_SOC_DAPM_OUT_DRV("Right+ Driver", BLOCK_EN, LORP_EN, 0,
NULL, 0),
SND_SOC_DAPM_OUT_DRV("Left- Driver", BLOCK_EN, LOLN_EN, 0,
NULL, 0),
SND_SOC_DAPM_OUT_DRV("Left+ Driver", BLOCK_EN, LOLP_EN, 0,
NULL, 0),
SND_SOC_DAPM_OUTPUT("LORN"),
SND_SOC_DAPM_OUTPUT("LORP"),
SND_SOC_DAPM_OUTPUT("LOLN"),
SND_SOC_DAPM_OUTPUT("LOLP"),
};
static const struct snd_soc_dapm_route t9015_dapm_routes[] = {
{ "Right IN", NULL, "Playback" },
{ "Left IN", NULL, "Playback" },
{ "Right DAC Sel", "Right", "Right IN" },
{ "Right DAC Sel", "Left", "Left IN" },
{ "Left DAC Sel", "Right", "Right IN" },
{ "Left DAC Sel", "Left", "Left IN" },
{ "Right DAC", NULL, "Right DAC Sel" },
{ "Left DAC", NULL, "Left DAC Sel" },
{ "Right- Driver", NULL, "Right DAC" },
{ "Right+ Driver", NULL, "Right DAC" },
{ "Left- Driver", NULL, "Left DAC" },
{ "Left+ Driver", NULL, "Left DAC" },
{ "LORN", NULL, "Right- Driver", },
{ "LORP", NULL, "Right+ Driver", },
{ "LOLN", NULL, "Left- Driver", },
{ "LOLP", NULL, "Left+ Driver", },
};
static int t9015_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct t9015 *priv = snd_soc_component_get_drvdata(component);
enum snd_soc_bias_level now =
snd_soc_component_get_bias_level(component);
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
snd_soc_component_update_bits(component, BLOCK_EN,
BIAS_CURRENT_EN,
BIAS_CURRENT_EN);
break;
case SND_SOC_BIAS_PREPARE:
snd_soc_component_update_bits(component, BLOCK_EN,
BIAS_CURRENT_EN,
0);
break;
case SND_SOC_BIAS_STANDBY:
ret = regulator_enable(priv->avdd);
if (ret) {
dev_err(component->dev, "AVDD enable failed\n");
return ret;
}
if (now == SND_SOC_BIAS_OFF) {
snd_soc_component_update_bits(component, BLOCK_EN,
VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN,
VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN);
mdelay(200);
snd_soc_component_update_bits(component, BLOCK_EN,
VMID_GEN_FAST,
0);
}
break;
case SND_SOC_BIAS_OFF:
snd_soc_component_update_bits(component, BLOCK_EN,
VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN,
0);
regulator_disable(priv->avdd);
break;
}
return 0;
}
static const struct snd_soc_component_driver t9015_codec_driver = {
.set_bias_level = t9015_set_bias_level,
.controls = t9015_snd_controls,
.num_controls = ARRAY_SIZE(t9015_snd_controls),
.dapm_widgets = t9015_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(t9015_dapm_widgets),
.dapm_routes = t9015_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(t9015_dapm_routes),
.suspend_bias_off = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static const struct regmap_config t9015_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = POWER_CFG,
};
static int t9015_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct t9015 *priv;
void __iomem *regs;
struct regmap *regmap;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
priv->pclk = devm_clk_get(dev, "pclk");
if (IS_ERR(priv->pclk)) {
if (PTR_ERR(priv->pclk) != -EPROBE_DEFER)
dev_err(dev, "failed to get core clock\n");
return PTR_ERR(priv->pclk);
}
priv->avdd = devm_regulator_get(dev, "AVDD");
if (IS_ERR(priv->avdd)) {
if (PTR_ERR(priv->avdd) != -EPROBE_DEFER)
dev_err(dev, "failed to AVDD\n");
return PTR_ERR(priv->avdd);
}
ret = clk_prepare_enable(priv->pclk);
if (ret) {
dev_err(dev, "core clock enable failed\n");
return ret;
}
ret = devm_add_action_or_reset(dev,
(void(*)(void *))clk_disable_unprepare,
priv->pclk);
if (ret)
return ret;
ret = device_reset(dev);
if (ret) {
dev_err(dev, "reset failed\n");
return ret;
}
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs)) {
dev_err(dev, "register map failed\n");
return PTR_ERR(regs);
}
regmap = devm_regmap_init_mmio(dev, regs, &t9015_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(regmap);
}
/*
* Initialize output polarity:
* ATM the output polarity is fixed but in the future it might useful
* to add DT property to set this depending on the platform needs
*/
regmap_write(regmap, LINEOUT_CFG, 0x1111);
return devm_snd_soc_register_component(dev, &t9015_codec_driver,
&t9015_dai, 1);
}
static const struct of_device_id t9015_ids[] __maybe_unused = {
{ .compatible = "amlogic,t9015", },
{ }
};
MODULE_DEVICE_TABLE(of, t9015_ids);
static struct platform_driver t9015_driver = {
.driver = {
.name = "t9015-codec",
.of_match_table = of_match_ptr(t9015_ids),
},
.probe = t9015_probe,
};
module_platform_driver(t9015_driver);
MODULE_DESCRIPTION("ASoC Amlogic T9015 codec driver");
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_LICENSE("GPL");
