/* 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 */