416 lines
10 KiB
C
416 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Audio driver for AK5558 ADC
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//
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// Copyright (C) 2015 Asahi Kasei Microdevices Corporation
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// Copyright 2018 NXP
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <sound/initval.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <sound/tlv.h>
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#include "ak5558.h"
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/* AK5558 Codec Private Data */
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struct ak5558_priv {
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struct snd_soc_component component;
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struct regmap *regmap;
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struct i2c_client *i2c;
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struct gpio_desc *reset_gpiod; /* Reset & Power down GPIO */
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int slots;
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int slot_width;
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};
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/* ak5558 register cache & default register settings */
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static const struct reg_default ak5558_reg[] = {
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{ 0x0, 0xFF }, /* 0x00 AK5558_00_POWER_MANAGEMENT1 */
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{ 0x1, 0x01 }, /* 0x01 AK5558_01_POWER_MANAGEMENT2 */
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{ 0x2, 0x01 }, /* 0x02 AK5558_02_CONTROL1 */
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{ 0x3, 0x00 }, /* 0x03 AK5558_03_CONTROL2 */
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{ 0x4, 0x00 }, /* 0x04 AK5558_04_CONTROL3 */
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{ 0x5, 0x00 } /* 0x05 AK5558_05_DSD */
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};
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static const char * const mono_texts[] = {
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"8 Slot", "2 Slot", "4 Slot", "1 Slot",
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};
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static const struct soc_enum ak5558_mono_enum[] = {
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SOC_ENUM_SINGLE(AK5558_01_POWER_MANAGEMENT2, 1,
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ARRAY_SIZE(mono_texts), mono_texts),
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};
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static const char * const digfil_texts[] = {
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"Sharp Roll-Off", "Show Roll-Off",
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"Short Delay Sharp Roll-Off", "Short Delay Show Roll-Off",
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};
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static const struct soc_enum ak5558_adcset_enum[] = {
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SOC_ENUM_SINGLE(AK5558_04_CONTROL3, 0,
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ARRAY_SIZE(digfil_texts), digfil_texts),
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};
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static const struct snd_kcontrol_new ak5558_snd_controls[] = {
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SOC_ENUM("AK5558 Monaural Mode", ak5558_mono_enum[0]),
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SOC_ENUM("AK5558 Digital Filter", ak5558_adcset_enum[0]),
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};
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static const struct snd_soc_dapm_widget ak5558_dapm_widgets[] = {
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/* Analog Input */
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SND_SOC_DAPM_INPUT("AIN1"),
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SND_SOC_DAPM_INPUT("AIN2"),
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SND_SOC_DAPM_INPUT("AIN3"),
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SND_SOC_DAPM_INPUT("AIN4"),
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SND_SOC_DAPM_INPUT("AIN5"),
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SND_SOC_DAPM_INPUT("AIN6"),
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SND_SOC_DAPM_INPUT("AIN7"),
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SND_SOC_DAPM_INPUT("AIN8"),
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SND_SOC_DAPM_ADC("ADC Ch1", NULL, AK5558_00_POWER_MANAGEMENT1, 0, 0),
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SND_SOC_DAPM_ADC("ADC Ch2", NULL, AK5558_00_POWER_MANAGEMENT1, 1, 0),
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SND_SOC_DAPM_ADC("ADC Ch3", NULL, AK5558_00_POWER_MANAGEMENT1, 2, 0),
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SND_SOC_DAPM_ADC("ADC Ch4", NULL, AK5558_00_POWER_MANAGEMENT1, 3, 0),
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SND_SOC_DAPM_ADC("ADC Ch5", NULL, AK5558_00_POWER_MANAGEMENT1, 4, 0),
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SND_SOC_DAPM_ADC("ADC Ch6", NULL, AK5558_00_POWER_MANAGEMENT1, 5, 0),
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SND_SOC_DAPM_ADC("ADC Ch7", NULL, AK5558_00_POWER_MANAGEMENT1, 6, 0),
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SND_SOC_DAPM_ADC("ADC Ch8", NULL, AK5558_00_POWER_MANAGEMENT1, 7, 0),
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SND_SOC_DAPM_AIF_OUT("SDTO", "Capture", 0, SND_SOC_NOPM, 0, 0),
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};
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static const struct snd_soc_dapm_route ak5558_intercon[] = {
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{"ADC Ch1", NULL, "AIN1"},
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{"SDTO", NULL, "ADC Ch1"},
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{"ADC Ch2", NULL, "AIN2"},
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{"SDTO", NULL, "ADC Ch2"},
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{"ADC Ch3", NULL, "AIN3"},
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{"SDTO", NULL, "ADC Ch3"},
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{"ADC Ch4", NULL, "AIN4"},
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{"SDTO", NULL, "ADC Ch4"},
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{"ADC Ch5", NULL, "AIN5"},
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{"SDTO", NULL, "ADC Ch5"},
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{"ADC Ch6", NULL, "AIN6"},
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{"SDTO", NULL, "ADC Ch6"},
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{"ADC Ch7", NULL, "AIN7"},
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{"SDTO", NULL, "ADC Ch7"},
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{"ADC Ch8", NULL, "AIN8"},
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{"SDTO", NULL, "ADC Ch8"},
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};
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static int ak5558_set_mcki(struct snd_soc_component *component)
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{
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return snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_CKS,
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AK5558_CKS_AUTO);
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}
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static int ak5558_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_component *component = dai->component;
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struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
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u8 bits;
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int pcm_width = max(params_physical_width(params), ak5558->slot_width);
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/* set master/slave audio interface */
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bits = snd_soc_component_read32(component, AK5558_02_CONTROL1);
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bits &= ~AK5558_BITS;
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switch (pcm_width) {
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case 16:
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bits |= AK5558_DIF_24BIT_MODE;
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break;
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case 32:
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bits |= AK5558_DIF_32BIT_MODE;
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break;
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default:
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return -EINVAL;
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}
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snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_BITS, bits);
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return 0;
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}
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static int ak5558_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct snd_soc_component *component = dai->component;
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u8 format;
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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break;
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case SND_SOC_DAIFMT_CBM_CFM:
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break;
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case SND_SOC_DAIFMT_CBS_CFM:
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case SND_SOC_DAIFMT_CBM_CFS:
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default:
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dev_err(dai->dev, "Clock mode unsupported");
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return -EINVAL;
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}
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/* set master/slave audio interface */
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format = snd_soc_component_read32(component, AK5558_02_CONTROL1);
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format &= ~AK5558_DIF;
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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format |= AK5558_DIF_I2S_MODE;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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format |= AK5558_DIF_MSB_MODE;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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format |= AK5558_DIF_MSB_MODE;
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break;
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default:
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return -EINVAL;
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}
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snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_DIF, format);
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return 0;
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}
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static int ak5558_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
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unsigned int rx_mask, int slots,
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int slot_width)
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{
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struct snd_soc_component *component = dai->component;
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struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
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int tdm_mode;
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ak5558->slots = slots;
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ak5558->slot_width = slot_width;
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switch (slots * slot_width) {
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case 128:
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tdm_mode = AK5558_MODE_TDM128;
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break;
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case 256:
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tdm_mode = AK5558_MODE_TDM256;
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break;
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case 512:
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tdm_mode = AK5558_MODE_TDM512;
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break;
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default:
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tdm_mode = AK5558_MODE_NORMAL;
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break;
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}
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snd_soc_component_update_bits(component, AK5558_03_CONTROL2, AK5558_MODE_BITS,
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tdm_mode);
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return 0;
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}
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#define AK5558_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
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SNDRV_PCM_FMTBIT_S24_LE |\
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SNDRV_PCM_FMTBIT_S32_LE)
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static const unsigned int ak5558_rates[] = {
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8000, 11025, 16000, 22050,
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32000, 44100, 48000, 88200,
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96000, 176400, 192000, 352800,
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384000, 705600, 768000, 1411200,
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2822400,
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};
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static const struct snd_pcm_hw_constraint_list ak5558_rate_constraints = {
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.count = ARRAY_SIZE(ak5558_rates),
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.list = ak5558_rates,
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};
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static int ak5558_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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return snd_pcm_hw_constraint_list(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_RATE,
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&ak5558_rate_constraints);
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}
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static struct snd_soc_dai_ops ak5558_dai_ops = {
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.startup = ak5558_startup,
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.hw_params = ak5558_hw_params,
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.set_fmt = ak5558_set_dai_fmt,
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.set_tdm_slot = ak5558_set_tdm_slot,
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};
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static struct snd_soc_dai_driver ak5558_dai = {
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.name = "ak5558-aif",
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 8,
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.rates = SNDRV_PCM_RATE_KNOT,
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.formats = AK5558_FORMATS,
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},
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.ops = &ak5558_dai_ops,
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};
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static void ak5558_power_off(struct ak5558_priv *ak5558)
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{
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if (!ak5558->reset_gpiod)
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return;
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gpiod_set_value_cansleep(ak5558->reset_gpiod, 0);
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usleep_range(1000, 2000);
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}
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static void ak5558_power_on(struct ak5558_priv *ak5558)
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{
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if (!ak5558->reset_gpiod)
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return;
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gpiod_set_value_cansleep(ak5558->reset_gpiod, 1);
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usleep_range(1000, 2000);
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}
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static int ak5558_probe(struct snd_soc_component *component)
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{
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struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
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ak5558_power_on(ak5558);
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return ak5558_set_mcki(component);
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}
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static void ak5558_remove(struct snd_soc_component *component)
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{
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struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
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ak5558_power_off(ak5558);
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}
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static int __maybe_unused ak5558_runtime_suspend(struct device *dev)
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{
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struct ak5558_priv *ak5558 = dev_get_drvdata(dev);
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regcache_cache_only(ak5558->regmap, true);
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ak5558_power_off(ak5558);
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return 0;
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}
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static int __maybe_unused ak5558_runtime_resume(struct device *dev)
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{
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struct ak5558_priv *ak5558 = dev_get_drvdata(dev);
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ak5558_power_off(ak5558);
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ak5558_power_on(ak5558);
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regcache_cache_only(ak5558->regmap, false);
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regcache_mark_dirty(ak5558->regmap);
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return regcache_sync(ak5558->regmap);
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}
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static const struct dev_pm_ops ak5558_pm = {
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SET_RUNTIME_PM_OPS(ak5558_runtime_suspend, ak5558_runtime_resume, NULL)
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SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
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pm_runtime_force_resume)
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};
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static const struct snd_soc_component_driver soc_codec_dev_ak5558 = {
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.probe = ak5558_probe,
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.remove = ak5558_remove,
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.controls = ak5558_snd_controls,
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.num_controls = ARRAY_SIZE(ak5558_snd_controls),
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.dapm_widgets = ak5558_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(ak5558_dapm_widgets),
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.dapm_routes = ak5558_intercon,
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.num_dapm_routes = ARRAY_SIZE(ak5558_intercon),
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.idle_bias_on = 1,
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.use_pmdown_time = 1,
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.endianness = 1,
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.non_legacy_dai_naming = 1,
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};
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static const struct regmap_config ak5558_regmap = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = AK5558_05_DSD,
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.reg_defaults = ak5558_reg,
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.num_reg_defaults = ARRAY_SIZE(ak5558_reg),
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.cache_type = REGCACHE_RBTREE,
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};
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static int ak5558_i2c_probe(struct i2c_client *i2c)
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{
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struct ak5558_priv *ak5558;
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int ret = 0;
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ak5558 = devm_kzalloc(&i2c->dev, sizeof(*ak5558), GFP_KERNEL);
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if (!ak5558)
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return -ENOMEM;
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ak5558->regmap = devm_regmap_init_i2c(i2c, &ak5558_regmap);
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if (IS_ERR(ak5558->regmap))
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return PTR_ERR(ak5558->regmap);
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i2c_set_clientdata(i2c, ak5558);
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ak5558->i2c = i2c;
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ak5558->reset_gpiod = devm_gpiod_get_optional(&i2c->dev, "reset",
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GPIOD_OUT_LOW);
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if (IS_ERR(ak5558->reset_gpiod))
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return PTR_ERR(ak5558->reset_gpiod);
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ret = devm_snd_soc_register_component(&i2c->dev,
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&soc_codec_dev_ak5558,
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&ak5558_dai, 1);
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if (ret)
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return ret;
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pm_runtime_enable(&i2c->dev);
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return 0;
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}
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static int ak5558_i2c_remove(struct i2c_client *i2c)
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{
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pm_runtime_disable(&i2c->dev);
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return 0;
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}
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static const struct of_device_id ak5558_i2c_dt_ids[] = {
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{ .compatible = "asahi-kasei,ak5558"},
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{ }
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};
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static struct i2c_driver ak5558_i2c_driver = {
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.driver = {
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.name = "ak5558",
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.of_match_table = of_match_ptr(ak5558_i2c_dt_ids),
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.pm = &ak5558_pm,
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},
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.probe_new = ak5558_i2c_probe,
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.remove = ak5558_i2c_remove,
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};
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module_i2c_driver(ak5558_i2c_driver);
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MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>");
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MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
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MODULE_DESCRIPTION("ASoC AK5558 ADC driver");
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MODULE_LICENSE("GPL v2");
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