linux/sound/soc/tegra/tegra210_amx.c

// SPDX-License-Identifier: GPL-2.0-only
//
// tegra210_amx.c - Tegra210 AMX driver
//
// Copyright (c) 2021-2023 NVIDIA CORPORATION.  All rights reserved.

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "tegra210_amx.h"
#include "tegra_cif.h"

/*
 * The counter is in terms of AHUB clock cycles. If a frame is not
 * received within these clock cycles, the AMX input channel gets
 * automatically disabled. For now the counter is calculated as a
 * function of sample rate (8 kHz) and AHUB clock (49.152 MHz).
 * If later an accurate number is needed, the counter needs to be
 * calculated at runtime.
 *
 *     count = ahub_clk / sample_rate
 */
#define TEGRA194_MAX_FRAME_IDLE_COUNT …

#define AMX_CH_REG(id, reg) …

static const struct reg_default tegra210_amx_reg_defaults[] = …;

static void tegra210_amx_write_map_ram(struct tegra210_amx *amx)
{ … }

static int tegra210_amx_startup(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{ … }

static int __maybe_unused tegra210_amx_runtime_suspend(struct device *dev)
{ … }

static int __maybe_unused tegra210_amx_runtime_resume(struct device *dev)
{ … }

static int tegra210_amx_set_audio_cif(struct snd_soc_dai *dai,
				      struct snd_pcm_hw_params *params,
				      unsigned int reg)
{ … }

static int tegra210_amx_in_hw_params(struct snd_pcm_substream *substream,
				     struct snd_pcm_hw_params *params,
				     struct snd_soc_dai *dai)
{ … }

static int tegra210_amx_out_hw_params(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params *params,
				      struct snd_soc_dai *dai)
{ … }

static int tegra210_amx_get_byte_map(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_value *ucontrol)
{ … }

static int tegra210_amx_put_byte_map(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_value *ucontrol)
{ … }

static const struct snd_soc_dai_ops tegra210_amx_out_dai_ops = …;

static const struct snd_soc_dai_ops tegra210_amx_in_dai_ops = …;

#define IN_DAI(id) …

#define OUT_DAI …

static struct snd_soc_dai_driver tegra210_amx_dais[] = …;

static const struct snd_soc_dapm_widget tegra210_amx_widgets[] = …;

#define STREAM_ROUTES(id, sname) …

#define AMX_ROUTES(id) …

static const struct snd_soc_dapm_route tegra210_amx_routes[] = …;

#define TEGRA210_AMX_BYTE_MAP_CTRL(reg) …

static struct snd_kcontrol_new tegra210_amx_controls[] = …;

static const struct snd_soc_component_driver tegra210_amx_cmpnt = …;

static bool tegra210_amx_wr_reg(struct device *dev, unsigned int reg)
{ … }

static bool tegra194_amx_wr_reg(struct device *dev, unsigned int reg)
{ … }

static bool tegra210_amx_rd_reg(struct device *dev, unsigned int reg)
{ … }

static bool tegra194_amx_rd_reg(struct device *dev, unsigned int reg)
{ … }

static bool tegra210_amx_volatile_reg(struct device *dev, unsigned int reg)
{ … }

static const struct regmap_config tegra210_amx_regmap_config = …;

static const struct regmap_config tegra194_amx_regmap_config = …;

static const struct tegra210_amx_soc_data soc_data_tegra210 = …;

static const struct tegra210_amx_soc_data soc_data_tegra194 = …;

static const struct of_device_id tegra210_amx_of_match[] = …;
MODULE_DEVICE_TABLE(of, tegra210_amx_of_match);

static int tegra210_amx_platform_probe(struct platform_device *pdev)
{ … }

static void tegra210_amx_platform_remove(struct platform_device *pdev)
{ … }

static const struct dev_pm_ops tegra210_amx_pm_ops = …;

static struct platform_driver tegra210_amx_driver = …;
module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;