/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2018 MediaTek Inc.
 *
 * Author: Sean Wang <sean.wang@mediatek.com>
 *
 */

#ifndef __PINCTRL_MTK_COMMON_V2_H
#define __PINCTRL_MTK_COMMON_V2_H

#include <linux/gpio/driver.h>

#define MTK_INPUT      0
#define MTK_OUTPUT     1
#define MTK_DISABLE    0
#define MTK_ENABLE     1
#define MTK_PULLDOWN   0
#define MTK_PULLUP     1

#define EINT_NA U16_MAX
#define NO_EINT_SUPPORT EINT_NA

#define PIN_FIELD_CALC(_s_pin, _e_pin, _i_base, _s_addr, _x_addrs,      \
                       _s_bit, _x_bits, _sz_reg, _fixed) {              \
                .s_pin = _s_pin,                                        \
                .e_pin = _e_pin,                                        \
                .i_base = _i_base,                                      \
                .s_addr = _s_addr,                                      \
                .x_addrs = _x_addrs,                                    \
                .s_bit = _s_bit,                                        \
                .x_bits = _x_bits,                                      \
                .sz_reg = _sz_reg,                                      \
                .fixed = _fixed,                                        \
        }

#define PIN_FIELD(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, _x_bits)   \
        PIN_FIELD_CALC(_s_pin, _e_pin, 0, _s_addr, _x_addrs, _s_bit,    \
                       _x_bits, 32, 0)

#define PINS_FIELD(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, _x_bits)  \
        PIN_FIELD_CALC(_s_pin, _e_pin, 0, _s_addr, _x_addrs, _s_bit,    \
                       _x_bits, 32, 1)

/* List these attributes which could be modified for the pin */
enum {
        PINCTRL_PIN_REG_MODE,
        PINCTRL_PIN_REG_DIR,
        PINCTRL_PIN_REG_DI,
        PINCTRL_PIN_REG_DO,
        PINCTRL_PIN_REG_SR,
        PINCTRL_PIN_REG_SMT,
        PINCTRL_PIN_REG_PD,
        PINCTRL_PIN_REG_PU,
        PINCTRL_PIN_REG_E4,
        PINCTRL_PIN_REG_E8,
        PINCTRL_PIN_REG_TDSEL,
        PINCTRL_PIN_REG_RDSEL,
        PINCTRL_PIN_REG_DRV,
        PINCTRL_PIN_REG_PUPD,
        PINCTRL_PIN_REG_R0,
        PINCTRL_PIN_REG_R1,
        PINCTRL_PIN_REG_IES,
        PINCTRL_PIN_REG_PULLEN,
        PINCTRL_PIN_REG_PULLSEL,
        PINCTRL_PIN_REG_DRV_EN,
        PINCTRL_PIN_REG_DRV_E0,
        PINCTRL_PIN_REG_DRV_E1,
        PINCTRL_PIN_REG_MAX,
};

/* Group the pins by the driving current */
enum {
        DRV_FIXED,
        DRV_GRP0,
        DRV_GRP1,
        DRV_GRP2,
        DRV_GRP3,
        DRV_GRP4,
        DRV_GRP_MAX,
};

static const char * const mtk_default_register_base_names[] = {
        "base",
};

/* struct mtk_pin_field - the structure that holds the information of the field
 *                        used to describe the attribute for the pin
 * @base:               the index pointing to the entry in base address list
 * @offset:             the register offset relative to the base address
 * @mask:               the mask used to filter out the field from the register
 * @bitpos:             the start bit relative to the register
 * @next:               the indication that the field would be extended to the
                        next register
 */
struct mtk_pin_field {
        u8  index;
        u32 offset;
        u32 mask;
        u8  bitpos;
        u8  next;
};

/* struct mtk_pin_field_calc - the structure that holds the range providing
 *                             the guide used to look up the relevant field
 * @s_pin:              the start pin within the range
 * @e_pin:              the end pin within the range
 * @i_base:             the index pointing to the entry in base address list
 * @s_addr:             the start address for the range
 * @x_addrs:            the address distance between two consecutive registers
 *                      within the range
 * @s_bit:              the start bit for the first register within the range
 * @x_bits:             the bit distance between two consecutive pins within
 *                      the range
 * @sz_reg:             the size of bits in a register
 * @fixed:              the consecutive pins share the same bits with the 1st
 *                      pin
 */
struct mtk_pin_field_calc {
        u16 s_pin;
        u16 e_pin;
        u8  i_base;
        u32 s_addr;
        u8  x_addrs;
        u8  s_bit;
        u8  x_bits;
        u8  sz_reg;
        u8  fixed;
};

/* struct mtk_pin_reg_calc - the structure that holds all ranges used to
 *                           determine which register the pin would make use of
 *                           for certain pin attribute.
 * @range:                   the start address for the range
 * @nranges:                 the number of items in the range
 */
struct mtk_pin_reg_calc {
        const struct mtk_pin_field_calc *range;
        unsigned int nranges;
};

/**
 * struct mtk_func_desc - the structure that providing information
 *                        all the funcs for this pin
 * @name:               the name of function
 * @muxval:             the mux to the function
 */
struct mtk_func_desc {
        const char *name;
        u8 muxval;
};

/**
 * struct mtk_eint_desc - the structure that providing information
 *                             for eint data per pin
 * @eint_m:             the eint mux for this pin
 * @eitn_n:             the eint number for this pin
 */
struct mtk_eint_desc {
        u16 eint_m;
        u16 eint_n;
};

/**
 * struct mtk_pin_desc - the structure that providing information
 *                             for each pin of chips
 * @number:             unique pin number from the global pin number space
 * @name:               name for this pin
 * @eint:               the eint data for this pin
 * @drv_n:              the index with the driving group
 * @funcs:              all available functions for this pins (only used in
 *                      those drivers compatible to pinctrl-mtk-common.c-like
 *                      ones)
 */
struct mtk_pin_desc {
        unsigned int number;
        const char *name;
        struct mtk_eint_desc eint;
        u8 drv_n;
        struct mtk_func_desc *funcs;
};

struct mtk_pinctrl_group {
        const char      *name;
        unsigned long   config;
        unsigned        pin;
};

struct mtk_pinctrl;

/* struct mtk_pin_soc - the structure that holds SoC-specific data */
struct mtk_pin_soc {
        const struct mtk_pin_reg_calc   *reg_cal;
        const struct mtk_pin_desc       *pins;
        unsigned int                    npins;
        const struct group_desc         *grps;
        unsigned int                    ngrps;
        const struct function_desc      *funcs;
        unsigned int                    nfuncs;
        const struct mtk_eint_regs      *eint_regs;
        const struct mtk_eint_hw        *eint_hw;

        /* Specific parameters per SoC */
        u8                              gpio_m;
        bool                            ies_present;
        const char * const              *base_names;
        unsigned int                    nbase_names;

        /* Specific pinconfig operations */
        int (*bias_disable_set)(struct mtk_pinctrl *hw,
                                const struct mtk_pin_desc *desc);
        int (*bias_disable_get)(struct mtk_pinctrl *hw,
                                const struct mtk_pin_desc *desc, int *res);
        int (*bias_set)(struct mtk_pinctrl *hw,
                        const struct mtk_pin_desc *desc, bool pullup);
        int (*bias_get)(struct mtk_pinctrl *hw,
                        const struct mtk_pin_desc *desc, bool pullup, int *res);

        int (*drive_set)(struct mtk_pinctrl *hw,
                         const struct mtk_pin_desc *desc, u32 arg);
        int (*drive_get)(struct mtk_pinctrl *hw,
                         const struct mtk_pin_desc *desc, int *val);

        int (*adv_pull_set)(struct mtk_pinctrl *hw,
                            const struct mtk_pin_desc *desc, bool pullup,
                            u32 arg);
        int (*adv_pull_get)(struct mtk_pinctrl *hw,
                            const struct mtk_pin_desc *desc, bool pullup,
                            u32 *val);
        int (*adv_drive_set)(struct mtk_pinctrl *hw,
                             const struct mtk_pin_desc *desc, u32 arg);
        int (*adv_drive_get)(struct mtk_pinctrl *hw,
                             const struct mtk_pin_desc *desc, u32 *val);

        /* Specific driver data */
        void                            *driver_data;
};

struct mtk_pinctrl {
        struct pinctrl_dev              *pctrl;
        void __iomem                    **base;
        u8                              nbase;
        struct device                   *dev;
        struct gpio_chip                chip;
        const struct mtk_pin_soc        *soc;
        struct mtk_eint                 *eint;
        struct mtk_pinctrl_group        *groups;
        const char          **grp_names;
};

void mtk_rmw(struct mtk_pinctrl *pctl, u8 i, u32 reg, u32 mask, u32 set);

int mtk_hw_set_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
                     int field, int value);
int mtk_hw_get_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
                     int field, int *value);

int mtk_build_eint(struct mtk_pinctrl *hw, struct platform_device *pdev);

int mtk_pinconf_bias_disable_set(struct mtk_pinctrl *hw,
                                 const struct mtk_pin_desc *desc);
int mtk_pinconf_bias_disable_get(struct mtk_pinctrl *hw,
                                 const struct mtk_pin_desc *desc, int *res);
int mtk_pinconf_bias_set(struct mtk_pinctrl *hw,
                         const struct mtk_pin_desc *desc, bool pullup);
int mtk_pinconf_bias_get(struct mtk_pinctrl *hw,
                         const struct mtk_pin_desc *desc, bool pullup,
                         int *res);

int mtk_pinconf_bias_disable_set_rev1(struct mtk_pinctrl *hw,
                                      const struct mtk_pin_desc *desc);
int mtk_pinconf_bias_disable_get_rev1(struct mtk_pinctrl *hw,
                                      const struct mtk_pin_desc *desc,
                                      int *res);
int mtk_pinconf_bias_set_rev1(struct mtk_pinctrl *hw,
                              const struct mtk_pin_desc *desc, bool pullup);
int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
                              const struct mtk_pin_desc *desc, bool pullup,
                              int *res);

int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
                          const struct mtk_pin_desc *desc, u32 arg);
int mtk_pinconf_drive_get(struct mtk_pinctrl *hw,
                          const struct mtk_pin_desc *desc, int *val);

int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw,
                               const struct mtk_pin_desc *desc, u32 arg);
int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
                               const struct mtk_pin_desc *desc, int *val);

int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
                             const struct mtk_pin_desc *desc, bool pullup,
                             u32 arg);
int mtk_pinconf_adv_pull_get(struct mtk_pinctrl *hw,
                             const struct mtk_pin_desc *desc, bool pullup,
                             u32 *val);
int mtk_pinconf_adv_drive_set(struct mtk_pinctrl *hw,
                              const struct mtk_pin_desc *desc, u32 arg);
int mtk_pinconf_adv_drive_get(struct mtk_pinctrl *hw,
                              const struct mtk_pin_desc *desc, u32 *val);

#endif /* __PINCTRL_MTK_COMMON_V2_H */