#include <linux/kernel.h>
#include <linux/reset.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <sound/initval.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-component.h>
#include <sound/tlv.h>
#include "ntpfw.h"
#define NTP8918_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000)
#define NTP8918_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
#define NTP8918_INPUT_FMT 0x0
#define NTP8918_INPUT_FMT_MASTER_MODE BIT(0)
#define NTP8918_INPUT_FMT_GSA_MODE BIT(1)
#define NTP8918_GSA_FMT 0x1
#define NTP8918_GSA_BS_MASK GENMASK(3, 2)
#define NTP8918_GSA_BS(x) ((x) << 2)
#define NTP8918_GSA_RIGHT_J BIT(0)
#define NTP8918_GSA_LSB BIT(1)
#define NTP8918_MCLK_FREQ_CTRL 0x2
#define NTP8918_MCLK_FREQ_MCF GENMASK(1, 0)
#define NTP8918_MASTER_VOL 0x0C
#define NTP8918_CHNL_A_VOL 0x17
#define NTP8918_CHNL_B_VOL 0x18
#define NTP8918_SOFT_MUTE 0x33
#define NTP8918_SOFT_MUTE_SM1 BIT(0)
#define NTP8918_SOFT_MUTE_SM2 BIT(1)
#define NTP8918_PWM_SWITCH 0x34
#define NTP8918_PWM_MASK_CTRL0 0x35
#define REG_MAX NTP8918_PWM_MASK_CTRL0
#define NTP8918_FW_NAME "eq_8918.bin"
#define NTP8918_FW_MAGIC 0x38393138
struct ntp8918_priv {
struct i2c_client *i2c;
struct clk *bck;
struct reset_control *reset;
unsigned int format;
};
static const DECLARE_TLV_DB_SCALE(ntp8918_master_vol_scale, -12550, 50, 0);
static const struct snd_kcontrol_new ntp8918_vol_control[] = {
SOC_SINGLE_RANGE_TLV("Playback Volume", NTP8918_MASTER_VOL, 0,
0x04, 0xff, 0, ntp8918_master_vol_scale),
SOC_SINGLE("Playback Switch", NTP8918_PWM_MASK_CTRL0, 1, 1, 1),
};
static void ntp8918_reset_gpio(struct ntp8918_priv *ntp8918)
{
reset_control_deassert(ntp8918->reset);
fsleep(1000);
reset_control_assert(ntp8918->reset);
fsleep(1);
reset_control_deassert(ntp8918->reset);
fsleep(500);
}
static const struct reg_sequence ntp8918_sound_off[] = {
{ NTP8918_MASTER_VOL, 0 },
};
static const struct reg_sequence ntp8918_sound_on[] = {
{ NTP8918_MASTER_VOL, 0b11 },
};
static int ntp8918_load_firmware(struct ntp8918_priv *ntp8918)
{
int ret;
ret = ntpfw_load(ntp8918->i2c, NTP8918_FW_NAME, NTP8918_FW_MAGIC);
if (ret == -ENOENT) {
dev_warn_once(&ntp8918->i2c->dev, "Could not find firmware %s\n",
NTP8918_FW_NAME);
return 0;
}
return ret;
}
static int ntp8918_snd_suspend(struct snd_soc_component *component)
{
struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
regcache_cache_only(component->regmap, true);
regmap_multi_reg_write_bypassed(component->regmap,
ntp8918_sound_off,
ARRAY_SIZE(ntp8918_sound_off));
fsleep(500);
reset_control_assert(ntp8918->reset);
regcache_mark_dirty(component->regmap);
clk_disable_unprepare(ntp8918->bck);
return 0;
}
static int ntp8918_snd_resume(struct snd_soc_component *component)
{
struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
int ret;
ret = clk_prepare_enable(ntp8918->bck);
if (ret)
return ret;
ntp8918_reset_gpio(ntp8918);
regmap_multi_reg_write_bypassed(component->regmap,
ntp8918_sound_on,
ARRAY_SIZE(ntp8918_sound_on));
ret = ntp8918_load_firmware(ntp8918);
if (ret) {
dev_err(&ntp8918->i2c->dev, "Failed to load firmware\n");
return ret;
}
regcache_cache_only(component->regmap, false);
snd_soc_component_cache_sync(component);
return 0;
}
static int ntp8918_probe(struct snd_soc_component *component)
{
int ret;
struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
struct device *dev = component->dev;
ret = snd_soc_add_component_controls(component, ntp8918_vol_control,
ARRAY_SIZE(ntp8918_vol_control));
if (ret)
return dev_err_probe(dev, ret, "Failed to add controls\n");
ret = ntp8918_load_firmware(ntp8918);
if (ret)
return dev_err_probe(dev, ret, "Failed to load firmware\n");
return 0;
}
static const struct snd_soc_dapm_widget ntp8918_dapm_widgets[] = {
SND_SOC_DAPM_DAC("AIFIN", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("OUT1"),
SND_SOC_DAPM_OUTPUT("OUT2"),
};
static const struct snd_soc_dapm_route ntp8918_dapm_routes[] = {
{ "OUT1", NULL, "AIFIN" },
{ "OUT2", NULL, "AIFIN" },
};
static const struct snd_soc_component_driver soc_component_ntp8918 = {
.probe = ntp8918_probe,
.suspend = ntp8918_snd_suspend,
.resume = ntp8918_snd_resume,
.dapm_widgets = ntp8918_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ntp8918_dapm_widgets),
.dapm_routes = ntp8918_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(ntp8918_dapm_routes),
};
static int ntp8918_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
unsigned int input_fmt = 0;
unsigned int gsa_fmt = 0;
unsigned int gsa_fmt_mask;
unsigned int mcf;
int bclk;
int ret;
bclk = snd_soc_params_to_bclk(params);
switch (bclk) {
case 3072000:
case 2822400:
mcf = 0;
break;
case 6144000:
mcf = 1;
break;
case 2048000:
mcf = 2;
break;
default:
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, NTP8918_MCLK_FREQ_CTRL,
NTP8918_MCLK_FREQ_MCF, mcf);
if (ret)
return ret;
switch (ntp8918->format) {
case SND_SOC_DAIFMT_I2S:
break;
case SND_SOC_DAIFMT_RIGHT_J:
input_fmt |= NTP8918_INPUT_FMT_GSA_MODE;
gsa_fmt |= NTP8918_GSA_RIGHT_J;
break;
case SND_SOC_DAIFMT_LEFT_J:
input_fmt |= NTP8918_INPUT_FMT_GSA_MODE;
break;
}
ret = snd_soc_component_update_bits(component, NTP8918_INPUT_FMT,
NTP8918_INPUT_FMT_MASTER_MODE |
NTP8918_INPUT_FMT_GSA_MODE,
input_fmt);
if (!(input_fmt & NTP8918_INPUT_FMT_GSA_MODE) || ret < 0)
return ret;
switch (params_width(params)) {
case 24:
gsa_fmt |= NTP8918_GSA_BS(0);
break;
case 20:
gsa_fmt |= NTP8918_GSA_BS(1);
break;
case 18:
gsa_fmt |= NTP8918_GSA_BS(2);
break;
case 16:
gsa_fmt |= NTP8918_GSA_BS(3);
break;
default:
return -EINVAL;
}
gsa_fmt_mask = NTP8918_GSA_BS_MASK |
NTP8918_GSA_RIGHT_J |
NTP8918_GSA_LSB;
return snd_soc_component_update_bits(component, NTP8918_GSA_FMT,
gsa_fmt_mask, gsa_fmt);
}
static int ntp8918_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component = dai->component;
struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_RIGHT_J:
case SND_SOC_DAIFMT_LEFT_J:
ntp8918->format = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
break;
default:
return -EINVAL;
}
return 0;
}
static int ntp8918_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
{
unsigned int mute_mask = NTP8918_SOFT_MUTE_SM1 |
NTP8918_SOFT_MUTE_SM2;
return snd_soc_component_update_bits(dai->component, NTP8918_SOFT_MUTE,
mute_mask, mute ? mute_mask : 0);
}
static const struct snd_soc_dai_ops ntp8918_dai_ops = {
.hw_params = ntp8918_hw_params,
.set_fmt = ntp8918_set_fmt,
.mute_stream = ntp8918_digital_mute,
};
static struct snd_soc_dai_driver ntp8918_dai = {
.name = "ntp8918-amplifier",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = NTP8918_RATES,
.formats = NTP8918_FORMATS,
},
.ops = &ntp8918_dai_ops,
};
static const struct regmap_config ntp8918_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = REG_MAX,
.cache_type = REGCACHE_MAPLE,
};
static int ntp8918_i2c_probe(struct i2c_client *i2c)
{
struct ntp8918_priv *ntp8918;
int ret;
struct regmap *regmap;
ntp8918 = devm_kzalloc(&i2c->dev, sizeof(*ntp8918), GFP_KERNEL);
if (!ntp8918)
return -ENOMEM;
ntp8918->i2c = i2c;
ntp8918->reset = devm_reset_control_get_shared(&i2c->dev, NULL);
if (IS_ERR(ntp8918->reset))
return dev_err_probe(&i2c->dev, PTR_ERR(ntp8918->reset), "Failed to get reset\n");
dev_set_drvdata(&i2c->dev, ntp8918);
ntp8918_reset_gpio(ntp8918);
regmap = devm_regmap_init_i2c(i2c, &ntp8918_regmap);
if (IS_ERR(regmap))
return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
"Failed to allocate regmap\n");
ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_ntp8918,
&ntp8918_dai, 1);
if (ret)
return dev_err_probe(&i2c->dev, ret,
"Failed to register component\n");
ntp8918->bck = devm_clk_get_enabled(&i2c->dev, "bck");
if (IS_ERR(ntp8918->bck))
return dev_err_probe(&i2c->dev, PTR_ERR(ntp8918->bck), "failed to get bck clock\n");
return 0;
}
static const struct i2c_device_id ntp8918_i2c_id[] = {
{ "ntp8918" },
{}
};
MODULE_DEVICE_TABLE(i2c, ntp8918_i2c_id);
static const struct of_device_id ntp8918_of_match[] = {
{.compatible = "neofidelity,ntp8918"},
{}
};
MODULE_DEVICE_TABLE(of, ntp8918_of_match);
static struct i2c_driver ntp8918_i2c_driver = {
.probe = ntp8918_i2c_probe,
.id_table = ntp8918_i2c_id,
.driver = {
.name = "ntp8918",
.of_match_table = ntp8918_of_match,
},
};
module_i2c_driver(ntp8918_i2c_driver);
MODULE_AUTHOR("Igor Prusov <ivprusov@salutedevices.com>");
MODULE_DESCRIPTION("NTP8918 Audio Amplifier Driver");
MODULE_LICENSE("GPL");
