ASoC: codecs: Add support for PCM1789 (4ae340d1) · Commits · e / devices / android_kernel_teracube_emerald

sound/soc/codecs/Kconfig

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		@@ -108,6 +108,7 @@ config SND_SOC_ALL_CODECS
		select SND_SOC_NAU8825 if I2C
		select SND_SOC_HDMI_CODEC
		select SND_SOC_PCM1681 if I2C
		select SND_SOC_PCM1789_I2C if I2C
		select SND_SOC_PCM179X_I2C if I2C
		select SND_SOC_PCM179X_SPI if SPI_MASTER
		select SND_SOC_PCM186X_I2C if I2C
		@@ -650,6 +651,17 @@ config SND_SOC_PCM1681
		tristate "Texas Instruments PCM1681 CODEC"
		depends on I2C

		config SND_SOC_PCM1789
		tristate

		config SND_SOC_PCM1789_I2C
		tristate "Texas Instruments PCM1789 CODEC (I2C)"
		depends on I2C
		select SND_SOC_PCM1789
		help
		Enable support for Texas Instruments PCM1789 CODEC.
		Select this if your PCM1789 is connected via an I2C bus.

		config SND_SOC_PCM179X
		tristate

sound/soc/codecs/Makefile

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		@@ -103,6 +103,8 @@ snd-soc-nau8824-objs := nau8824.o
		snd-soc-nau8825-objs := nau8825.o
		snd-soc-hdmi-codec-objs := hdmi-codec.o
		snd-soc-pcm1681-objs := pcm1681.o
		snd-soc-pcm1789-codec-objs := pcm1789.o
		snd-soc-pcm1789-i2c-objs := pcm1789-i2c.o
		snd-soc-pcm179x-codec-objs := pcm179x.o
		snd-soc-pcm179x-i2c-objs := pcm179x-i2c.o
		snd-soc-pcm179x-spi-objs := pcm179x-spi.o
		@@ -349,6 +351,8 @@ obj-$(CONFIG_SND_SOC_NAU8825) += snd-soc-nau8825.o
		obj-$(CONFIG_SND_SOC_HDMI_CODEC) += snd-soc-hdmi-codec.o
		obj-$(CONFIG_SND_SOC_PCM1681) += snd-soc-pcm1681.o
		obj-$(CONFIG_SND_SOC_PCM179X) += snd-soc-pcm179x-codec.o
		obj-$(CONFIG_SND_SOC_PCM1789_I2C) += snd-soc-pcm1789-i2c.o
		obj-$(CONFIG_SND_SOC_PCM1789) += snd-soc-pcm1789-codec.o
		obj-$(CONFIG_SND_SOC_PCM179X_I2C) += snd-soc-pcm179x-i2c.o
		obj-$(CONFIG_SND_SOC_PCM179X_SPI) += snd-soc-pcm179x-spi.o
		obj-$(CONFIG_SND_SOC_PCM186X) += snd-soc-pcm186x.o

sound/soc/codecs/pcm1789-i2c.c

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		// SPDX-License-Identifier: GPL-2.0
		// Audio driver for PCM1789 I2C
		// Copyright (C) 2018 Bootlin
		// Mylène Josserand <mylene.josserand@bootlin.com>

		#include <linux/clk.h>
		#include <linux/delay.h>
		#include <linux/i2c.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/regmap.h>

		#include "pcm1789.h"

		static int pcm1789_i2c_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct regmap *regmap;
		int ret;

		regmap = devm_regmap_init_i2c(client, &pcm1789_regmap_config);
		if (IS_ERR(regmap)) {
		ret = PTR_ERR(regmap);
		dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret);
		return ret;
		}

		return pcm1789_common_init(&client->dev, regmap);
		}

		static int pcm1789_i2c_remove(struct i2c_client *client)
		{
		return pcm1789_common_exit(&client->dev);
		}

		static const struct of_device_id pcm1789_of_match[] = {
		{ .compatible = "ti,pcm1789", },
		{ }
		};
		MODULE_DEVICE_TABLE(of, pcm1789_of_match);

		static const struct i2c_device_id pcm1789_i2c_ids[] = {
		{ "pcm1789", 0 },
		{ }
		};
		MODULE_DEVICE_TABLE(i2c, pcm1789_i2c_ids);

		static struct i2c_driver pcm1789_i2c_driver = {
		.driver = {
		.name = "pcm1789",
		.of_match_table = of_match_ptr(pcm1789_of_match),
		},
		.id_table = pcm1789_i2c_ids,
		.probe = pcm1789_i2c_probe,
		.remove = pcm1789_i2c_remove,
		};

		module_i2c_driver(pcm1789_i2c_driver);

		MODULE_DESCRIPTION("ASoC PCM1789 I2C driver");
		MODULE_AUTHOR("Mylène Josserand <mylene.josserand@bootlin.com>");
		MODULE_LICENSE("GPL");

sound/soc/codecs/pcm1789.c

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		// SPDX-License-Identifier: GPL-2.0
		// Audio driver for PCM1789
		// Copyright (C) 2018 Bootlin
		// Mylène Josserand <mylene.josserand@bootlin.com>

		#include <linux/gpio.h>
		#include <linux/module.h>
		#include <linux/workqueue.h>

		#include <sound/pcm_params.h>
		#include <sound/soc.h>
		#include <sound/tlv.h>

		#include "pcm1789.h"

		#define PCM1789_MUTE_CONTROL 0x10
		#define PCM1789_FMT_CONTROL 0x11
		#define PCM1789_SOFT_MUTE 0x14
		#define PCM1789_DAC_VOL_LEFT 0x18
		#define PCM1789_DAC_VOL_RIGHT 0x19

		#define PCM1789_FMT_MASK 0x07
		#define PCM1789_MUTE_MASK 0x03
		#define PCM1789_MUTE_SRET 0x06

		struct pcm1789_private {
		struct regmap *regmap;
		unsigned int format;
		unsigned int rate;
		struct gpio_desc *reset;
		struct work_struct work;
		struct device *dev;
		};

		static const struct reg_default pcm1789_reg_defaults[] = {
		{ PCM1789_FMT_CONTROL, 0x00 },
		{ PCM1789_SOFT_MUTE, 0x00 },
		{ PCM1789_DAC_VOL_LEFT, 0xff },
		{ PCM1789_DAC_VOL_RIGHT, 0xff },
		};

		static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg)
		{
		return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT;
		}

		static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg)
		{
		return pcm1789_accessible_reg(dev, reg);
		}

		static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int format)
		{
		struct snd_soc_component *component = codec_dai->component;
		struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);

		priv->format = format;

		return 0;
		}

		static int pcm1789_digital_mute(struct snd_soc_dai *codec_dai, int mute)
		{
		struct snd_soc_component *component = codec_dai->component;
		struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);

		return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,
		PCM1789_MUTE_MASK,
		mute ? 0 : PCM1789_MUTE_MASK);
		}

		static int pcm1789_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params,
		struct snd_soc_dai *codec_dai)
		{
		struct snd_soc_component *component = codec_dai->component;
		struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
		int val = 0, ret;

		priv->rate = params_rate(params);

		switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
		case SND_SOC_DAIFMT_RIGHT_J:
		switch (params_width(params)) {
		case 24:
		val = 2;
		break;
		case 16:
		val = 3;
		break;
		default:
		return -EINVAL;
		}
		break;
		case SND_SOC_DAIFMT_I2S:
		switch (params_width(params)) {
		case 16:
		case 24:
		case 32:
		val = 0;
		break;
		default:
		return -EINVAL;
		}
		break;
		case SND_SOC_DAIFMT_LEFT_J:
		switch (params_width(params)) {
		case 16:
		case 24:
		case 32:
		val = 1;
		break;
		default:
		return -EINVAL;
		}
		break;
		default:
		dev_err(component->dev, "Invalid DAI format\n");
		return -EINVAL;
		}

		ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL,
		PCM1789_FMT_MASK, val);
		if (ret < 0)
		return ret;

		return 0;
		}

		static void pcm1789_work_queue(struct work_struct *work)
		{
		struct pcm1789_private *priv = container_of(work,
		struct pcm1789_private,
		work);

		/* Perform a software reset to remove codec from desynchronized state */
		if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL,
		0x3 << PCM1789_MUTE_SRET, 0) < 0)
		dev_err(priv->dev, "Error while setting SRET");
		}

		static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd,
		struct snd_soc_dai *dai)
		{
		struct snd_soc_component *component = dai->component;
		struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
		int ret = 0;

		switch (cmd) {
		case SNDRV_PCM_TRIGGER_START:
		case SNDRV_PCM_TRIGGER_RESUME:
		case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		schedule_work(&priv->work);
		break;
		case SNDRV_PCM_TRIGGER_STOP:
		case SNDRV_PCM_TRIGGER_SUSPEND:
		case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		break;
		default:
		ret = -EINVAL;
		}

		return ret;
		}

		static const struct snd_soc_dai_ops pcm1789_dai_ops = {
		.set_fmt = pcm1789_set_dai_fmt,
		.hw_params = pcm1789_hw_params,
		.digital_mute = pcm1789_digital_mute,
		.trigger = pcm1789_trigger,
		};

		static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1);

		static const struct snd_kcontrol_new pcm1789_controls[] = {
		SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT,
		PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
		pcm1789_dac_tlv),
		};

		static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = {
		SND_SOC_DAPM_OUTPUT("IOUTL+"),
		SND_SOC_DAPM_OUTPUT("IOUTL-"),
		SND_SOC_DAPM_OUTPUT("IOUTR+"),
		SND_SOC_DAPM_OUTPUT("IOUTR-"),
		};

		static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = {
		{ "IOUTL+", NULL, "Playback" },
		{ "IOUTL-", NULL, "Playback" },
		{ "IOUTR+", NULL, "Playback" },
		{ "IOUTR-", NULL, "Playback" },
		};

		static struct snd_soc_dai_driver pcm1789_dai = {
		.name = "pcm1789-hifi",
		.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_CONTINUOUS,
		.rate_min = 10000,
		.rate_max = 200000,
		.formats = PCM1789_FORMATS,
		},
		.ops = &pcm1789_dai_ops,
		};

		const struct regmap_config pcm1789_regmap_config = {
		.reg_bits = 8,
		.val_bits = 8,
		.max_register = PCM1789_DAC_VOL_RIGHT,
		.reg_defaults = pcm1789_reg_defaults,
		.num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults),
		.writeable_reg = pcm1789_writeable_reg,
		.readable_reg = pcm1789_accessible_reg,
		};
		EXPORT_SYMBOL_GPL(pcm1789_regmap_config);

		static const struct snd_soc_component_driver soc_component_dev_pcm1789 = {
		.controls = pcm1789_controls,
		.num_controls = ARRAY_SIZE(pcm1789_controls),
		.dapm_widgets = pcm1789_dapm_widgets,
		.num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets),
		.dapm_routes = pcm1789_dapm_routes,
		.num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes),
		.idle_bias_on = 1,
		.use_pmdown_time = 1,
		.endianness = 1,
		.non_legacy_dai_naming = 1,
		};

		int pcm1789_common_init(struct device dev, struct regmap regmap)
		{
		struct pcm1789_private *pcm1789;

		pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private),
		GFP_KERNEL);
		if (!pcm1789)
		return -ENOMEM;

		pcm1789->regmap = regmap;
		pcm1789->dev = dev;
		dev_set_drvdata(dev, pcm1789);

		pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
		if (IS_ERR(pcm1789->reset))
		return PTR_ERR(pcm1789->reset);

		gpiod_set_value_cansleep(pcm1789->reset, 0);
		msleep(300);

		INIT_WORK(&pcm1789->work, pcm1789_work_queue);

		return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789,
		&pcm1789_dai, 1);
		}
		EXPORT_SYMBOL_GPL(pcm1789_common_init);

		int pcm1789_common_exit(struct device *dev)
		{
		struct pcm1789_private *priv = dev_get_drvdata(dev);

		if (&priv->work)
		flush_work(&priv->work);

		return 0;
		}
		EXPORT_SYMBOL_GPL(pcm1789_common_exit);

		MODULE_DESCRIPTION("ASoC PCM1789 driver");
		MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>");
		MODULE_LICENSE("GPL");

sound/soc/codecs/pcm1789.h

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		// SPDX-License-Identifier: GPL-2.0
		// Definitions for PCM1789 audio driver
		// Copyright (C) 2018 Bootlin
		// Mylène Josserand <mylene.josserand@bootlin.com>

		#ifndef __PCM1789_H__
		#define __PCM1789_H__

		#define PCM1789_FORMATS (SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S24_LE \| \
		SNDRV_PCM_FMTBIT_S16_LE)

		extern const struct regmap_config pcm1789_regmap_config;

		int pcm1789_common_init(struct device dev, struct regmap regmap);
		int pcm1789_common_exit(struct device *dev);

		#endif