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linux/sound/soc/codecs/ak5558.c
Shengjiu Wang 2ff6d5a108
ASoC: ak5558: Add regulator support 
"AVDD" is for analog power supply,  "DVDD" is for digital power
supply, they can improve the power management.

As the regulator is enabled in pm runtime resume, which is
behind the component driver probe, so accessing registers in
component driver probe will fail. Fix this issue by enabling
regcache_cache_only after pm_runtime_enable.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1598190877-9213-2-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-08-24 13:59:45 +01:00

439 lines
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// SPDX-License-Identifier: GPL-2.0
//
// Audio driver for AK5558 ADC
//
// Copyright (C) 2015 Asahi Kasei Microdevices Corporation
// Copyright 2018 NXP
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>
#include "ak5558.h"
#define AK5558_NUM_SUPPLIES 2
static const char *ak5558_supply_names[AK5558_NUM_SUPPLIES] = {
"DVDD",
"AVDD",
};
/* AK5558 Codec Private Data */
struct ak5558_priv {
struct regulator_bulk_data supplies[AK5558_NUM_SUPPLIES];
struct snd_soc_component component;
struct regmap *regmap;
struct i2c_client *i2c;
struct gpio_desc *reset_gpiod; /* Reset & Power down GPIO */
int slots;
int slot_width;
};
/* ak5558 register cache & default register settings */
static const struct reg_default ak5558_reg[] = {
{ 0x0, 0xFF }, /* 0x00 AK5558_00_POWER_MANAGEMENT1 */
{ 0x1, 0x01 }, /* 0x01 AK5558_01_POWER_MANAGEMENT2 */
{ 0x2, 0x01 }, /* 0x02 AK5558_02_CONTROL1 */
{ 0x3, 0x00 }, /* 0x03 AK5558_03_CONTROL2 */
{ 0x4, 0x00 }, /* 0x04 AK5558_04_CONTROL3 */
{ 0x5, 0x00 } /* 0x05 AK5558_05_DSD */
};
static const char * const mono_texts[] = {
"8 Slot", "2 Slot", "4 Slot", "1 Slot",
};
static const struct soc_enum ak5558_mono_enum[] = {
SOC_ENUM_SINGLE(AK5558_01_POWER_MANAGEMENT2, 1,
ARRAY_SIZE(mono_texts), mono_texts),
};
static const char * const digfil_texts[] = {
"Sharp Roll-Off", "Show Roll-Off",
"Short Delay Sharp Roll-Off", "Short Delay Show Roll-Off",
};
static const struct soc_enum ak5558_adcset_enum[] = {
SOC_ENUM_SINGLE(AK5558_04_CONTROL3, 0,
ARRAY_SIZE(digfil_texts), digfil_texts),
};
static const struct snd_kcontrol_new ak5558_snd_controls[] = {
SOC_ENUM("AK5558 Monaural Mode", ak5558_mono_enum[0]),
SOC_ENUM("AK5558 Digital Filter", ak5558_adcset_enum[0]),
};
static const struct snd_soc_dapm_widget ak5558_dapm_widgets[] = {
/* Analog Input */
SND_SOC_DAPM_INPUT("AIN1"),
SND_SOC_DAPM_INPUT("AIN2"),
SND_SOC_DAPM_INPUT("AIN3"),
SND_SOC_DAPM_INPUT("AIN4"),
SND_SOC_DAPM_INPUT("AIN5"),
SND_SOC_DAPM_INPUT("AIN6"),
SND_SOC_DAPM_INPUT("AIN7"),
SND_SOC_DAPM_INPUT("AIN8"),
SND_SOC_DAPM_ADC("ADC Ch1", NULL, AK5558_00_POWER_MANAGEMENT1, 0, 0),
SND_SOC_DAPM_ADC("ADC Ch2", NULL, AK5558_00_POWER_MANAGEMENT1, 1, 0),
SND_SOC_DAPM_ADC("ADC Ch3", NULL, AK5558_00_POWER_MANAGEMENT1, 2, 0),
SND_SOC_DAPM_ADC("ADC Ch4", NULL, AK5558_00_POWER_MANAGEMENT1, 3, 0),
SND_SOC_DAPM_ADC("ADC Ch5", NULL, AK5558_00_POWER_MANAGEMENT1, 4, 0),
SND_SOC_DAPM_ADC("ADC Ch6", NULL, AK5558_00_POWER_MANAGEMENT1, 5, 0),
SND_SOC_DAPM_ADC("ADC Ch7", NULL, AK5558_00_POWER_MANAGEMENT1, 6, 0),
SND_SOC_DAPM_ADC("ADC Ch8", NULL, AK5558_00_POWER_MANAGEMENT1, 7, 0),
SND_SOC_DAPM_AIF_OUT("SDTO", "Capture", 0, SND_SOC_NOPM, 0, 0),
};
static const struct snd_soc_dapm_route ak5558_intercon[] = {
{"ADC Ch1", NULL, "AIN1"},
{"SDTO", NULL, "ADC Ch1"},
{"ADC Ch2", NULL, "AIN2"},
{"SDTO", NULL, "ADC Ch2"},
{"ADC Ch3", NULL, "AIN3"},
{"SDTO", NULL, "ADC Ch3"},
{"ADC Ch4", NULL, "AIN4"},
{"SDTO", NULL, "ADC Ch4"},
{"ADC Ch5", NULL, "AIN5"},
{"SDTO", NULL, "ADC Ch5"},
{"ADC Ch6", NULL, "AIN6"},
{"SDTO", NULL, "ADC Ch6"},
{"ADC Ch7", NULL, "AIN7"},
{"SDTO", NULL, "ADC Ch7"},
{"ADC Ch8", NULL, "AIN8"},
{"SDTO", NULL, "ADC Ch8"},
};
static int ak5558_set_mcki(struct snd_soc_component *component)
{
return snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_CKS,
AK5558_CKS_AUTO);
}
static int ak5558_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 ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
u8 bits;
int pcm_width = max(params_physical_width(params), ak5558->slot_width);
switch (pcm_width) {
case 16:
bits = AK5558_DIF_24BIT_MODE;
break;
case 32:
bits = AK5558_DIF_32BIT_MODE;
break;
default:
return -EINVAL;
}
snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_BITS, bits);
return 0;
}
static int ak5558_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component = dai->component;
u8 format;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
case SND_SOC_DAIFMT_CBM_CFM:
break;
case SND_SOC_DAIFMT_CBS_CFM:
case SND_SOC_DAIFMT_CBM_CFS:
default:
dev_err(dai->dev, "Clock mode unsupported");
return -EINVAL;
}
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
format = AK5558_DIF_I2S_MODE;
break;
case SND_SOC_DAIFMT_LEFT_J:
format = AK5558_DIF_MSB_MODE;
break;
case SND_SOC_DAIFMT_DSP_B:
format = AK5558_DIF_MSB_MODE;
break;
default:
return -EINVAL;
}
snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_DIF, format);
return 0;
}
static int ak5558_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
unsigned int rx_mask, int slots,
int slot_width)
{
struct snd_soc_component *component = dai->component;
struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
int tdm_mode;
ak5558->slots = slots;
ak5558->slot_width = slot_width;
switch (slots * slot_width) {
case 128:
tdm_mode = AK5558_MODE_TDM128;
break;
case 256:
tdm_mode = AK5558_MODE_TDM256;
break;
case 512:
tdm_mode = AK5558_MODE_TDM512;
break;
default:
tdm_mode = AK5558_MODE_NORMAL;
break;
}
snd_soc_component_update_bits(component, AK5558_03_CONTROL2, AK5558_MODE_BITS,
tdm_mode);
return 0;
}
#define AK5558_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
SNDRV_PCM_FMTBIT_S24_LE |\
SNDRV_PCM_FMTBIT_S32_LE)
static const unsigned int ak5558_rates[] = {
8000, 11025, 16000, 22050,
32000, 44100, 48000, 88200,
96000, 176400, 192000, 352800,
384000, 705600, 768000, 1411200,
2822400,
};
static const struct snd_pcm_hw_constraint_list ak5558_rate_constraints = {
.count = ARRAY_SIZE(ak5558_rates),
.list = ak5558_rates,
};
static int ak5558_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
&ak5558_rate_constraints);
}
static const struct snd_soc_dai_ops ak5558_dai_ops = {
.startup = ak5558_startup,
.hw_params = ak5558_hw_params,
.set_fmt = ak5558_set_dai_fmt,
.set_tdm_slot = ak5558_set_tdm_slot,
};
static struct snd_soc_dai_driver ak5558_dai = {
.name = "ak5558-aif",
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = AK5558_FORMATS,
},
.ops = &ak5558_dai_ops,
};
static void ak5558_power_off(struct ak5558_priv *ak5558)
{
if (!ak5558->reset_gpiod)
return;
gpiod_set_value_cansleep(ak5558->reset_gpiod, 0);
usleep_range(1000, 2000);
}
static void ak5558_power_on(struct ak5558_priv *ak5558)
{
if (!ak5558->reset_gpiod)
return;
gpiod_set_value_cansleep(ak5558->reset_gpiod, 1);
usleep_range(1000, 2000);
}
static int ak5558_probe(struct snd_soc_component *component)
{
struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
ak5558_power_on(ak5558);
return ak5558_set_mcki(component);
}
static void ak5558_remove(struct snd_soc_component *component)
{
struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
ak5558_power_off(ak5558);
}
static int __maybe_unused ak5558_runtime_suspend(struct device *dev)
{
struct ak5558_priv *ak5558 = dev_get_drvdata(dev);
regcache_cache_only(ak5558->regmap, true);
ak5558_power_off(ak5558);
regulator_bulk_disable(ARRAY_SIZE(ak5558->supplies),
ak5558->supplies);
return 0;
}
static int __maybe_unused ak5558_runtime_resume(struct device *dev)
{
struct ak5558_priv *ak5558 = dev_get_drvdata(dev);
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ak5558->supplies),
ak5558->supplies);
if (ret != 0) {
dev_err(dev, "Failed to enable supplies: %d\n", ret);
return ret;
}
ak5558_power_off(ak5558);
ak5558_power_on(ak5558);
regcache_cache_only(ak5558->regmap, false);
regcache_mark_dirty(ak5558->regmap);
return regcache_sync(ak5558->regmap);
}
static const struct dev_pm_ops ak5558_pm = {
SET_RUNTIME_PM_OPS(ak5558_runtime_suspend, ak5558_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static const struct snd_soc_component_driver soc_codec_dev_ak5558 = {
.probe = ak5558_probe,
.remove = ak5558_remove,
.controls = ak5558_snd_controls,
.num_controls = ARRAY_SIZE(ak5558_snd_controls),
.dapm_widgets = ak5558_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ak5558_dapm_widgets),
.dapm_routes = ak5558_intercon,
.num_dapm_routes = ARRAY_SIZE(ak5558_intercon),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static const struct regmap_config ak5558_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = AK5558_05_DSD,
.reg_defaults = ak5558_reg,
.num_reg_defaults = ARRAY_SIZE(ak5558_reg),
.cache_type = REGCACHE_RBTREE,
};
static int ak5558_i2c_probe(struct i2c_client *i2c)
{
struct ak5558_priv *ak5558;
int ret = 0;
int i;
ak5558 = devm_kzalloc(&i2c->dev, sizeof(*ak5558), GFP_KERNEL);
if (!ak5558)
return -ENOMEM;
ak5558->regmap = devm_regmap_init_i2c(i2c, &ak5558_regmap);
if (IS_ERR(ak5558->regmap))
return PTR_ERR(ak5558->regmap);
i2c_set_clientdata(i2c, ak5558);
ak5558->i2c = i2c;
ak5558->reset_gpiod = devm_gpiod_get_optional(&i2c->dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(ak5558->reset_gpiod))
return PTR_ERR(ak5558->reset_gpiod);
for (i = 0; i < ARRAY_SIZE(ak5558->supplies); i++)
ak5558->supplies[i].supply = ak5558_supply_names[i];
ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(ak5558->supplies),
ak5558->supplies);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
return ret;
}
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_codec_dev_ak5558,
&ak5558_dai, 1);
if (ret)
return ret;
pm_runtime_enable(&i2c->dev);
regcache_cache_only(ak5558->regmap, true);
return 0;
}
static int ak5558_i2c_remove(struct i2c_client *i2c)
{
pm_runtime_disable(&i2c->dev);
return 0;
}
static const struct of_device_id ak5558_i2c_dt_ids[] = {
{ .compatible = "asahi-kasei,ak5558"},
{ }
};
static struct i2c_driver ak5558_i2c_driver = {
.driver = {
.name = "ak5558",
.of_match_table = of_match_ptr(ak5558_i2c_dt_ids),
.pm = &ak5558_pm,
},
.probe_new = ak5558_i2c_probe,
.remove = ak5558_i2c_remove,
};
module_i2c_driver(ak5558_i2c_driver);
MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>");
MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
MODULE_DESCRIPTION("ASoC AK5558 ADC driver");
MODULE_LICENSE("GPL v2");
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