| // 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/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" |
| |
| /* AK5558 Codec Private Data */ |
| struct ak5558_priv { |
| 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); |
| |
| /* set master/slave audio interface */ |
| bits = snd_soc_component_read32(component, AK5558_02_CONTROL1); |
| bits &= ~AK5558_BITS; |
| |
| 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 */ |
| format = snd_soc_component_read32(component, AK5558_02_CONTROL1); |
| format &= ~AK5558_DIF; |
| |
| 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 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); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused ak5558_runtime_resume(struct device *dev) |
| { |
| struct ak5558_priv *ak5558 = dev_get_drvdata(dev); |
| |
| ak5558_power_off(ak5558); |
| ak5558_power_on(ak5558); |
| |
| regcache_cache_only(ak5558->regmap, false); |
| regcache_mark_dirty(ak5558->regmap); |
| |
| return regcache_sync(ak5558->regmap); |
| } |
| |
| 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) |
| }; |
| |
| 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; |
| |
| 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); |
| |
| ret = devm_snd_soc_register_component(&i2c->dev, |
| &soc_codec_dev_ak5558, |
| &ak5558_dai, 1); |
| if (ret) |
| return ret; |
| |
| pm_runtime_enable(&i2c->dev); |
| |
| 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"); |