/*
 * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @file
 * ESP32 SoC specific helpers for pinctrl driver
 */

#ifndef ZEPHYR_SOC_XTENSA_ESP32_PINCTRL_SOC_H_
#define ZEPHYR_SOC_XTENSA_ESP32_PINCTRL_SOC_H_

#include <zephyr/devicetree.h>
#include <zephyr/types.h>

#include <zephyr/dt-bindings/pinctrl/esp-pinctrl-common.h>

/** @cond INTERNAL_HIDDEN */

/** Type for ESP32 pin. */
typedef struct pinctrl_soc_pin {
	/** Pinmux settings (pin, direction and signal). */
	uint32_t pinmux;
	/** Pincfg settings (bias). */
	uint32_t pincfg;
} pinctrl_soc_pin_t;

/**
 * @brief Utility macro to initialize pinmux field in #pinctrl_pin_t.
 *
 * @param node_id Node identifier.
 */
#define Z_PINCTRL_ESP32_PINMUX_INIT(node_id, prop, idx) \
	DT_PROP_BY_IDX(node_id, prop, idx)

/**
 * @brief Utility macro to initialize pincfg field in #pinctrl_pin_t.
 *
 * @param node_id Node identifier.
 */
#define Z_PINCTRL_ESP32_PINCFG_INIT(node_id)							\
	(((ESP32_NO_PULL * DT_PROP(node_id, bias_disable)) << ESP32_PIN_BIAS_SHIFT) |		\
	 ((ESP32_PULL_UP * DT_PROP(node_id, bias_pull_up)) << ESP32_PIN_BIAS_SHIFT) |		\
	 ((ESP32_PULL_DOWN * DT_PROP(node_id, bias_pull_down)) << ESP32_PIN_BIAS_SHIFT) |	\
	 ((ESP32_PUSH_PULL * DT_PROP(node_id, drive_push_pull)) << ESP32_PIN_DRV_SHIFT) |	\
	 ((ESP32_OPEN_DRAIN * DT_PROP(node_id, drive_open_drain)) << ESP32_PIN_DRV_SHIFT) |	\
	 ((ESP32_PIN_OUT_HIGH * DT_PROP(node_id, output_high)) << ESP32_PIN_OUT_SHIFT) |	\
	 ((ESP32_PIN_OUT_LOW * DT_PROP(node_id, output_low)) << ESP32_PIN_OUT_SHIFT))

/**
 * @brief Utility macro to initialize each pin.
 *
 * @param node_id Node identifier.
 * @param prop Property name.
 * @param idx Property entry index.
 */
#define Z_PINCTRL_STATE_PIN_INIT(node_id, prop, idx)				\
	{ .pinmux = Z_PINCTRL_ESP32_PINMUX_INIT(node_id, prop, idx),		\
	  .pincfg = Z_PINCTRL_ESP32_PINCFG_INIT(node_id) },

/**
 * @brief Utility macro to initialize state pins contained in a given property.
 *
 * @param node_id Node identifier.
 * @param prop Property name describing state pins.
 */
#define Z_PINCTRL_STATE_PINS_INIT(node_id, prop)			       \
	{DT_FOREACH_CHILD_VARGS(DT_PHANDLE(node_id, prop),		       \
				DT_FOREACH_PROP_ELEM, pinmux,		       \
				Z_PINCTRL_STATE_PIN_INIT)}

/** @endcond */

#endif /* ZEPHYR_SOC_XTENSA_ESP32_PINCTRL_SOC_H_ */