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/* 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
#define MTK_INPUT 0
#define MTK_OUTPUT 1
#define MTK_DISABLE 0
#define MTK_ENABLE 1
#define EINT_NA -1
#define PIN_FIELD_CALC(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, \
_x_bits, _sz_reg, _fixed) { \
.s_pin = _s_pin, \
.e_pin = _e_pin, \
.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, _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, _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_MAX,
};
/* Group the pins by the driving current */
enum {
DRV_FIXED,
DRV_GRP0,
DRV_GRP1,
DRV_GRP2,
DRV_GRP3,
DRV_GRP4,
DRV_GRP_MAX,
};
/* struct mtk_pin_field - the structure that holds the information of the field
* used to describe the attribute for the pin
* @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 {
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
* @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;
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_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_n: the eint number for this pin
* @drv_n: the index with the driving group
*/
struct mtk_pin_desc {
unsigned int number;
const char *name;
u16 eint_n;
u8 drv_n;
};
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 pinctrl_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;
u8 eint_m;
/* Specific pinconfig operations */
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);
};
struct mtk_pinctrl {
struct pinctrl_dev *pctrl;
void __iomem *base;
struct device *dev;
struct gpio_chip chip;
const struct mtk_pin_soc *soc;
struct mtk_eint *eint;
};
void mtk_rmw(struct mtk_pinctrl *pctl, u32 reg, u32 mask, u32 set);
int mtk_hw_set_value(struct mtk_pinctrl *hw, int pin, int field, int value);
int mtk_hw_get_value(struct mtk_pinctrl *hw, int pin, int field, int *value);
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);
#endif /* __PINCTRL_MTK_COMMON_V2_H */
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