/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2014-2025 MediaTek Inc.
 *
 * Author: Maoguang Meng <maoguang.meng@mediatek.com>
 *	   Sean Wang <sean.wang@mediatek.com>
 *	   Hao Chang <ot_chhao.chang@mediatek.com>
 *	   Qingliang Li <qingliang.li@mediatek.com>
 */
#ifndef __MTK_EINT_H
#define __MTK_EINT_H

#include <linux/irqdomain.h>

struct mtk_eint_regs {
	unsigned int	stat;
	unsigned int	ack;
	unsigned int	mask;
	unsigned int	mask_set;
	unsigned int	mask_clr;
	unsigned int	sens;
	unsigned int	sens_set;
	unsigned int	sens_clr;
	unsigned int	soft;
	unsigned int	soft_set;
	unsigned int	soft_clr;
	unsigned int	pol;
	unsigned int	pol_set;
	unsigned int	pol_clr;
	unsigned int	dom_en;
	unsigned int	dbnc_ctrl;
	unsigned int	dbnc_set;
	unsigned int	dbnc_clr;
};

struct mtk_eint_hw {
	u8		port_mask;
	u8		ports;
	unsigned int	ap_num;
	unsigned int	db_cnt;
	const unsigned int *db_time;
};

struct mtk_eint_pin {
	u16 number;
	u8 instance;
	u8 index;
	bool debounce;
	bool dual_edge;
};

extern const unsigned int debounce_time_mt2701[];
extern const unsigned int debounce_time_mt6765[];
extern const unsigned int debounce_time_mt6795[];
extern const unsigned int debounce_time_mt6878[];

struct mtk_eint;

struct mtk_eint_xt {
	int (*get_gpio_n)(void *data, unsigned long eint_n,
			  unsigned int *gpio_n,
			  struct gpio_chip **gpio_chip);
	int (*get_gpio_state)(void *data, unsigned long eint_n);
	int (*set_gpio_as_eint)(void *data, unsigned long eint_n);
};

struct mtk_eint {
	struct device *dev;
	void __iomem **base;
	int nbase;
	u16 *base_pin_num;
	struct irq_domain *domain;
	int irq;

	int *dual_edge;
	u16 **pin_list;
	u32 **wake_mask;
	u32 **cur_mask;

	/* Used to fit into various EINT device */
	const struct mtk_eint_hw *hw;
	const struct mtk_eint_regs *regs;
	struct mtk_eint_pin *pins;
	u16 num_db_time;

	/* Used to fit into various pinctrl device */
	void *pctl;
	const struct mtk_eint_xt *gpio_xlate;
};

#if IS_ENABLED(CONFIG_EINT_MTK)
int mtk_eint_do_init(struct mtk_eint *eint, struct mtk_eint_pin *eint_pin);
int mtk_eint_do_suspend(struct mtk_eint *eint);
int mtk_eint_do_resume(struct mtk_eint *eint);
int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_n,
			  unsigned int debounce);
int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n);

#else
static inline int mtk_eint_do_init(struct mtk_eint *eint,
				   struct mtk_eint_pin *eint_pin)
{
	return -EOPNOTSUPP;
}

static inline int mtk_eint_do_suspend(struct mtk_eint *eint)
{
	return -EOPNOTSUPP;
}

static inline int mtk_eint_do_resume(struct mtk_eint *eint)
{
	return -EOPNOTSUPP;
}

static inline int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_n,
			  unsigned int debounce)
{
	return -EOPNOTSUPP;
}

static inline int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n)
{
	return -EOPNOTSUPP;
}
#endif
#endif /* __MTK_EINT_H */