#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <sound/soc.h>
#include "max98504.h"
static const char * const max98504_supply_names[] = {
"DVDD",
"DIOVDD",
"PVDD",
};
#define MAX98504_NUM_SUPPLIES ARRAY_SIZE(max98504_supply_names)
struct max98504_priv {
struct regmap *regmap;
struct regulator_bulk_data supplies[MAX98504_NUM_SUPPLIES];
unsigned int pcm_rx_channels;
bool brownout_enable;
unsigned int brownout_threshold;
unsigned int brownout_attenuation;
unsigned int brownout_attack_hold;
unsigned int brownout_timed_hold;
unsigned int brownout_release_rate;
};
static const struct reg_default max98504_reg_defaults[] = {
{ 0x01, 0},
{ 0x02, 0},
{ 0x03, 0},
{ 0x04, 0},
{ 0x10, 0},
{ 0x11, 0},
{ 0x12, 0},
{ 0x13, 0},
{ 0x14, 0},
{ 0x15, 0},
{ 0x16, 0},
{ 0x17, 0},
{ 0x18, 0},
{ 0x19, 0},
{ 0x1A, 0},
{ 0x20, 0},
{ 0x21, 0},
{ 0x22, 0},
{ 0x23, 0},
{ 0x24, 0},
{ 0x25, 0},
{ 0x26, 0},
{ 0x27, 0},
{ 0x28, 0},
{ 0x30, 0},
{ 0x31, 0},
{ 0x32, 0},
{ 0x33, 0},
{ 0x34, 0},
{ 0x35, 0},
{ 0x36, 0},
{ 0x37, 0},
{ 0x38, 0},
{ 0x39, 0},
{ 0x40, 0},
{ 0x41, 0},
};
static bool max98504_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX98504_INTERRUPT_STATUS:
case MAX98504_INTERRUPT_FLAGS:
case MAX98504_INTERRUPT_FLAG_CLEARS:
case MAX98504_WATCHDOG_CLEAR:
case MAX98504_GLOBAL_ENABLE:
case MAX98504_SOFTWARE_RESET:
return true;
default:
return false;
}
}
static bool max98504_readable_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX98504_SOFTWARE_RESET:
case MAX98504_WATCHDOG_CLEAR:
case MAX98504_INTERRUPT_FLAG_CLEARS:
return false;
default:
return true;
}
}
static int max98504_pcm_rx_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE,
max98504->pcm_rx_channels);
break;
case SND_SOC_DAPM_POST_PMD:
regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, 0);
break;
}
return 0;
}
static int max98504_component_probe(struct snd_soc_component *c)
{
struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
struct regmap *map = max98504->regmap;
int ret;
ret = regulator_bulk_enable(MAX98504_NUM_SUPPLIES, max98504->supplies);
if (ret < 0)
return ret;
regmap_write(map, MAX98504_SOFTWARE_RESET, 0x1);
msleep(20);
if (!max98504->brownout_enable)
return 0;
regmap_write(map, MAX98504_PVDD_BROWNOUT_ENABLE, 0x1);
regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_1,
(max98504->brownout_threshold & 0x1f) << 3 |
(max98504->brownout_attenuation & 0x3));
regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_2,
max98504->brownout_attack_hold & 0xff);
regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_3,
max98504->brownout_timed_hold & 0xff);
regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_4,
max98504->brownout_release_rate & 0xff);
return 0;
}
static void max98504_component_remove(struct snd_soc_component *c)
{
struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
regulator_bulk_disable(MAX98504_NUM_SUPPLIES, max98504->supplies);
}
static const char *spk_source_mux_text[] = {
"PCM Monomix", "Analog In", "PDM Left", "PDM Right"
};
static const struct soc_enum spk_source_mux_enum =
SOC_ENUM_SINGLE(MAX98504_SPEAKER_SOURCE_SELECT,
0, ARRAY_SIZE(spk_source_mux_text),
spk_source_mux_text);
static const struct snd_kcontrol_new spk_source_mux =
SOC_DAPM_ENUM("SPK Source", spk_source_mux_enum);
static const struct snd_soc_dapm_route max98504_dapm_routes[] = {
{ "SPKOUT", NULL, "Global Enable" },
{ "SPK Source", "PCM Monomix", "DAC PCM" },
{ "SPK Source", "Analog In", "AIN" },
{ "SPK Source", "PDM Left", "DAC PDM" },
{ "SPK Source", "PDM Right", "DAC PDM" },
};
static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = {
SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_GLOBAL_ENABLE,
0, 0, NULL, 0),
SND_SOC_DAPM_INPUT("AIN"),
SND_SOC_DAPM_AIF_OUT("AIF2OUTL", "AIF2 Capture", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_OUT("AIF2OUTR", "AIF2 Capture", 1, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC_E("DAC PCM", NULL, SND_SOC_NOPM, 0, 0,
max98504_pcm_rx_ev,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_DAC("DAC PDM", NULL, MAX98504_PDM_RX_ENABLE, 0, 0),
SND_SOC_DAPM_MUX("SPK Source", SND_SOC_NOPM, 0, 0, &spk_source_mux),
SND_SOC_DAPM_REG(snd_soc_dapm_spk, "SPKOUT",
MAX98504_SPEAKER_ENABLE, 0, 1, 1, 0),
};
static int max98504_set_tdm_slot(struct snd_soc_dai *dai,
unsigned int tx_mask, unsigned int rx_mask,
int slots, int slot_width)
{
struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
struct regmap *map = max98504->regmap;
switch (dai->id) {
case MAX98504_DAI_ID_PCM:
regmap_write(map, MAX98504_PCM_TX_ENABLE, tx_mask);
max98504->pcm_rx_channels = rx_mask;
break;
case MAX98504_DAI_ID_PDM:
regmap_write(map, MAX98504_PDM_TX_ENABLE, tx_mask);
break;
default:
WARN_ON(1);
}
return 0;
}
static int max98504_set_channel_map(struct snd_soc_dai *dai,
unsigned int tx_num,
const unsigned int *tx_slot,
unsigned int rx_num,
const unsigned int *rx_slot)
{
struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
struct regmap *map = max98504->regmap;
unsigned int i, sources = 0;
for (i = 0; i < tx_num; i++)
if (tx_slot[i])
sources |= (1 << i);
switch (dai->id) {
case MAX98504_DAI_ID_PCM:
regmap_write(map, MAX98504_PCM_TX_CHANNEL_SOURCES,
sources);
break;
case MAX98504_DAI_ID_PDM:
regmap_write(map, MAX98504_PDM_TX_CONTROL, sources);
break;
default:
WARN_ON(1);
}
regmap_write(map, MAX98504_MEASUREMENT_ENABLE, sources ? 0x3 : 0x01);
return 0;
}
static const struct snd_soc_dai_ops max98504_dai_ops = {
.set_tdm_slot = max98504_set_tdm_slot,
.set_channel_map = max98504_set_channel_map,
};
#define MAX98504_FORMATS (SNDRV_PCM_FMTBIT_S8|SNDRV_PCM_FMTBIT_S16_LE|\
SNDRV_PCM_FMTBIT_S24_LE|SNDRV_PCM_FMTBIT_S32_LE)
#define MAX98504_PDM_RATES (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|\
SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100|\
SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|\
SNDRV_PCM_RATE_96000)
static struct snd_soc_dai_driver max98504_dai[] = {
{
.name = "max98504-aif2",
.id = MAX98504_DAI_ID_PDM,
.playback = {
.stream_name = "AIF2 Playback",
.channels_min = 1,
.channels_max = 2,
.rates = MAX98504_PDM_RATES,
.formats = MAX98504_FORMATS,
},
.capture = {
.stream_name = "AIF2 Capture",
.channels_min = 1,
.channels_max = 2,
.rates = MAX98504_PDM_RATES,
.formats = MAX98504_FORMATS,
},
.ops = &max98504_dai_ops,
},
};
static const struct snd_soc_component_driver max98504_component_driver = {
.probe = max98504_component_probe,
.remove = max98504_component_remove,
.dapm_widgets = max98504_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(max98504_dapm_widgets),
.dapm_routes = max98504_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(max98504_dapm_routes),
.endianness = 1,
};
static const struct regmap_config max98504_regmap = {
.reg_bits = 16,
.val_bits = 8,
.max_register = MAX98504_MAX_REGISTER,
.reg_defaults = max98504_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(max98504_reg_defaults),
.volatile_reg = max98504_volatile_register,
.readable_reg = max98504_readable_register,
.cache_type = REGCACHE_RBTREE,
};
static int max98504_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *node = dev->of_node;
struct max98504_priv *max98504;
int i, ret;
max98504 = devm_kzalloc(dev, sizeof(*max98504), GFP_KERNEL);
if (!max98504)
return -ENOMEM;
if (node) {
if (!of_property_read_u32(node, "maxim,brownout-threshold",
&max98504->brownout_threshold))
max98504->brownout_enable = true;
of_property_read_u32(node, "maxim,brownout-attenuation",
&max98504->brownout_attenuation);
of_property_read_u32(node, "maxim,brownout-attack-hold-ms",
&max98504->brownout_attack_hold);
of_property_read_u32(node, "maxim,brownout-timed-hold-ms",
&max98504->brownout_timed_hold);
of_property_read_u32(node, "maxim,brownout-release-rate-ms",
&max98504->brownout_release_rate);
}
max98504->regmap = devm_regmap_init_i2c(client, &max98504_regmap);
if (IS_ERR(max98504->regmap)) {
ret = PTR_ERR(max98504->regmap);
dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
return ret;
}
for (i = 0; i < MAX98504_NUM_SUPPLIES; i++)
max98504->supplies[i].supply = max98504_supply_names[i];
ret = devm_regulator_bulk_get(dev, MAX98504_NUM_SUPPLIES,
max98504->supplies);
if (ret < 0)
return ret;
i2c_set_clientdata(client, max98504);
return devm_snd_soc_register_component(dev, &max98504_component_driver,
max98504_dai, ARRAY_SIZE(max98504_dai));
}
#ifdef CONFIG_OF
static const struct of_device_id max98504_of_match[] = {
{ .compatible = "maxim,max98504" },
{ },
};
MODULE_DEVICE_TABLE(of, max98504_of_match);
#endif
static const struct i2c_device_id max98504_i2c_id[] = {
{ .name = "max98504" },
{ }
};
MODULE_DEVICE_TABLE(i2c, max98504_i2c_id);
static struct i2c_driver max98504_i2c_driver = {
.driver = {
.name = "max98504",
.of_match_table = of_match_ptr(max98504_of_match),
},
.probe = max98504_i2c_probe,
.id_table = max98504_i2c_id,
};
module_i2c_driver(max98504_i2c_driver);
MODULE_DESCRIPTION("ASoC MAX98504 driver");
MODULE_LICENSE("GPL");
