#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/bits.h>
#include <linux/reset.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.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 NTP8835_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
#define NTP8835_INPUT_FMT 0x0
#define NTP8835_INPUT_FMT_MASTER_MODE BIT(0)
#define NTP8835_INPUT_FMT_GSA_MODE BIT(1)
#define NTP8835_GSA_FMT 0x1
#define NTP8835_GSA_BS_MASK GENMASK(3, 2)
#define NTP8835_GSA_BS(x) ((x) << 2)
#define NTP8835_GSA_RIGHT_J BIT(0)
#define NTP8835_GSA_LSB BIT(1)
#define NTP8835_MCLK_FREQ_CTRL 0x2
#define NTP8835_MCLK_FREQ_MCF GENMASK(1, 0)
#define NTP8835_SOFT_MUTE 0x26
#define NTP8835_SOFT_MUTE_SM1 BIT(0)
#define NTP8835_SOFT_MUTE_SM2 BIT(1)
#define NTP8835_SOFT_MUTE_SM3 BIT(2)
#define NTP8835_PWM_SWITCH 0x27
#define NTP8835_PWM_SWITCH_POF1 BIT(0)
#define NTP8835_PWM_SWITCH_POF2 BIT(1)
#define NTP8835_PWM_SWITCH_POF3 BIT(2)
#define NTP8835_PWM_MASK_CTRL0 0x28
#define NTP8835_PWM_MASK_CTRL0_OUT_LOW BIT(1)
#define NTP8835_PWM_MASK_CTRL0_FPMLD BIT(2)
#define NTP8835_MASTER_VOL 0x2e
#define NTP8835_CHNL_A_VOL 0x2f
#define NTP8835_CHNL_B_VOL 0x30
#define NTP8835_CHNL_C_VOL 0x31
#define REG_MAX NTP8835_CHNL_C_VOL
#define NTP8835_FW_NAME "eq_8835.bin"
#define NTP8835_FW_MAGIC 0x38383335
struct ntp8835_priv {
struct i2c_client *i2c;
struct reset_control *reset;
unsigned int format;
struct clk *mclk;
unsigned int mclk_rate;
};
static const DECLARE_TLV_DB_RANGE(ntp8835_vol_scale,
0, 1, TLV_DB_SCALE_ITEM(-15000, 0, 0),
2, 6, TLV_DB_SCALE_ITEM(-15000, 1000, 0),
7, 0xff, TLV_DB_SCALE_ITEM(-10000, 50, 0),
);
static int ntp8835_mute_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
uinfo->access =
(SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE);
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 1;
uinfo->value.integer.step = 1;
return 0;
}
static int ntp8835_mute_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
unsigned int val;
val = snd_soc_component_read(component, NTP8835_SOFT_MUTE);
ucontrol->value.integer.value[0] = val ? 0 : 1;
return 0;
}
static int ntp8835_mute_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
unsigned int val;
val = ucontrol->value.integer.value[0] ? 0 : 7;
snd_soc_component_write(component, NTP8835_SOFT_MUTE, val);
return 0;
}
static const struct snd_kcontrol_new ntp8835_vol_control[] = {
SOC_SINGLE_TLV("Playback Volume", NTP8835_MASTER_VOL, 0,
0xff, 0, ntp8835_vol_scale),
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Playback Switch",
.info = ntp8835_mute_info,
.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE,
.get = ntp8835_mute_get,
.put = ntp8835_mute_put,
},
};
static void ntp8835_reset_gpio(struct ntp8835_priv *ntp8835)
{
reset_control_deassert(ntp8835->reset);
fsleep(1000);
reset_control_assert(ntp8835->reset);
fsleep(1);
reset_control_deassert(ntp8835->reset);
fsleep(500);
}
static const struct reg_sequence ntp8835_sound_on[] = {
{ NTP8835_PWM_MASK_CTRL0, NTP8835_PWM_MASK_CTRL0_FPMLD },
{ NTP8835_PWM_SWITCH, 0x00 },
{ NTP8835_SOFT_MUTE, 0x00 },
};
static const struct reg_sequence ntp8835_sound_off[] = {
{ NTP8835_SOFT_MUTE, NTP8835_SOFT_MUTE_SM1 |
NTP8835_SOFT_MUTE_SM2 |
NTP8835_SOFT_MUTE_SM3 },
{ NTP8835_PWM_SWITCH, NTP8835_PWM_SWITCH_POF1 |
NTP8835_PWM_SWITCH_POF2 |
NTP8835_PWM_SWITCH_POF3 },
{ NTP8835_PWM_MASK_CTRL0, NTP8835_PWM_MASK_CTRL0_OUT_LOW |
NTP8835_PWM_MASK_CTRL0_FPMLD },
};
static int ntp8835_load_firmware(struct ntp8835_priv *ntp8835)
{
int ret;
ret = ntpfw_load(ntp8835->i2c, NTP8835_FW_NAME, NTP8835_FW_MAGIC);
if (ret == -ENOENT) {
dev_warn_once(&ntp8835->i2c->dev,
"Could not find firmware %s\n", NTP8835_FW_NAME);
return 0;
}
return ret;
}
static int ntp8835_snd_suspend(struct snd_soc_component *component)
{
struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
regcache_cache_only(component->regmap, true);
regmap_multi_reg_write_bypassed(component->regmap,
ntp8835_sound_off,
ARRAY_SIZE(ntp8835_sound_off));
fsleep(500);
reset_control_assert(ntp8835->reset);
regcache_mark_dirty(component->regmap);
clk_disable_unprepare(ntp8835->mclk);
return 0;
}
static int ntp8835_snd_resume(struct snd_soc_component *component)
{
struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
int ret;
ntp8835_reset_gpio(ntp8835);
ret = clk_prepare_enable(ntp8835->mclk);
if (ret)
return ret;
regmap_multi_reg_write_bypassed(component->regmap,
ntp8835_sound_on,
ARRAY_SIZE(ntp8835_sound_on));
ret = ntp8835_load_firmware(ntp8835);
if (ret) {
dev_err(&ntp8835->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 ntp8835_probe(struct snd_soc_component *component)
{
int ret;
struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
struct device *dev = component->dev;
ret = snd_soc_add_component_controls(component, ntp8835_vol_control,
ARRAY_SIZE(ntp8835_vol_control));
if (ret)
return dev_err_probe(dev, ret, "Failed to add controls\n");
ret = ntp8835_load_firmware(ntp8835);
if (ret)
return dev_err_probe(dev, ret, "Failed to load firmware\n");
return 0;
}
static const struct snd_soc_dapm_widget ntp8835_dapm_widgets[] = {
SND_SOC_DAPM_DAC("AIFIN", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("OUT1"),
SND_SOC_DAPM_OUTPUT("OUT2"),
SND_SOC_DAPM_OUTPUT("OUT3"),
};
static const struct snd_soc_dapm_route ntp8835_dapm_routes[] = {
{ "OUT1", NULL, "AIFIN" },
{ "OUT2", NULL, "AIFIN" },
{ "OUT3", NULL, "AIFIN" },
};
static int ntp8835_set_component_sysclk(struct snd_soc_component *component,
int clk_id, int source,
unsigned int freq, int dir)
{
struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
switch (freq) {
case 12288000:
case 24576000:
case 18432000:
ntp8835->mclk_rate = freq;
break;
default:
ntp8835->mclk_rate = 0;
dev_err(component->dev, "Unsupported MCLK value: %u", freq);
return -EINVAL;
}
return 0;
}
static const struct snd_soc_component_driver soc_component_ntp8835 = {
.probe = ntp8835_probe,
.suspend = ntp8835_snd_suspend,
.resume = ntp8835_snd_resume,
.dapm_widgets = ntp8835_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ntp8835_dapm_widgets),
.dapm_routes = ntp8835_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(ntp8835_dapm_routes),
.set_sysclk = ntp8835_set_component_sysclk,
};
static int ntp8835_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 ntp8835_priv *ntp8835 = 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 ret;
switch (ntp8835->mclk_rate) {
case 12288000:
mcf = 0;
break;
case 24576000:
mcf = 1;
break;
case 18432000:
mcf = 2;
break;
default:
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, NTP8835_MCLK_FREQ_CTRL,
NTP8835_MCLK_FREQ_MCF, mcf);
if (ret)
return ret;
switch (ntp8835->format) {
case SND_SOC_DAIFMT_I2S:
break;
case SND_SOC_DAIFMT_RIGHT_J:
input_fmt |= NTP8835_INPUT_FMT_GSA_MODE;
gsa_fmt |= NTP8835_GSA_RIGHT_J;
break;
case SND_SOC_DAIFMT_LEFT_J:
input_fmt |= NTP8835_INPUT_FMT_GSA_MODE;
break;
}
ret = snd_soc_component_update_bits(component, NTP8835_INPUT_FMT,
NTP8835_INPUT_FMT_MASTER_MODE |
NTP8835_INPUT_FMT_GSA_MODE,
input_fmt);
if (!(input_fmt & NTP8835_INPUT_FMT_GSA_MODE) || ret < 0)
return ret;
switch (params_width(params)) {
case 24:
gsa_fmt |= NTP8835_GSA_BS(0);
break;
case 20:
gsa_fmt |= NTP8835_GSA_BS(1);
break;
case 18:
gsa_fmt |= NTP8835_GSA_BS(2);
break;
case 16:
gsa_fmt |= NTP8835_GSA_BS(3);
break;
default:
return -EINVAL;
}
gsa_fmt_mask = NTP8835_GSA_BS_MASK |
NTP8835_GSA_RIGHT_J |
NTP8835_GSA_LSB;
return snd_soc_component_update_bits(component, NTP8835_GSA_FMT,
gsa_fmt_mask, gsa_fmt);
}
static int ntp8835_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component = dai->component;
struct ntp8835_priv *ntp8835 = 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:
ntp8835->format = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
break;
default:
return -EINVAL;
}
return 0;
};
static const struct snd_soc_dai_ops ntp8835_dai_ops = {
.hw_params = ntp8835_hw_params,
.set_fmt = ntp8835_set_fmt,
};
static struct snd_soc_dai_driver ntp8835_dai = {
.name = "ntp8835-amplifier",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 3,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = NTP8835_FORMATS,
},
.ops = &ntp8835_dai_ops,
};
static const struct regmap_config ntp8835_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = REG_MAX,
.cache_type = REGCACHE_MAPLE,
};
static int ntp8835_i2c_probe(struct i2c_client *i2c)
{
struct ntp8835_priv *ntp8835;
struct regmap *regmap;
int ret;
ntp8835 = devm_kzalloc(&i2c->dev, sizeof(*ntp8835), GFP_KERNEL);
if (!ntp8835)
return -ENOMEM;
ntp8835->i2c = i2c;
ntp8835->reset = devm_reset_control_get_shared(&i2c->dev, NULL);
if (IS_ERR(ntp8835->reset))
return dev_err_probe(&i2c->dev, PTR_ERR(ntp8835->reset),
"Failed to get reset\n");
ret = reset_control_deassert(ntp8835->reset);
if (ret)
return dev_err_probe(&i2c->dev, ret,
"Failed to deassert reset\n");
dev_set_drvdata(&i2c->dev, ntp8835);
ntp8835_reset_gpio(ntp8835);
regmap = devm_regmap_init_i2c(i2c, &ntp8835_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_ntp8835,
&ntp8835_dai, 1);
if (ret)
return dev_err_probe(&i2c->dev, ret,
"Failed to register component\n");
ntp8835->mclk = devm_clk_get_enabled(&i2c->dev, "mclk");
if (IS_ERR(ntp8835->mclk))
return dev_err_probe(&i2c->dev, PTR_ERR(ntp8835->mclk), "failed to get mclk\n");
return 0;
}
static const struct i2c_device_id ntp8835_i2c_id[] = {
{ "ntp8835" },
{}
};
MODULE_DEVICE_TABLE(i2c, ntp8835_i2c_id);
static const struct of_device_id ntp8835_of_match[] = {
{.compatible = "neofidelity,ntp8835",},
{}
};
MODULE_DEVICE_TABLE(of, ntp8835_of_match);
static struct i2c_driver ntp8835_i2c_driver = {
.probe = ntp8835_i2c_probe,
.id_table = ntp8835_i2c_id,
.driver = {
.name = "ntp8835",
.of_match_table = ntp8835_of_match,
},
};
module_i2c_driver(ntp8835_i2c_driver);
MODULE_AUTHOR("Igor Prusov <ivprusov@salutedevices.com>");
MODULE_DESCRIPTION("NTP8835 Audio Amplifier Driver");
MODULE_LICENSE("GPL");
