gpio_common.h

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#ifndef SOC_MEDIATEK_COMMON_GPIO_H
#define SOC_MEDIATEK_COMMON_GPIO_H
 
#include <soc/addressmap.h>
#include <soc/gpio_base.h>
#include <stddef.h>
#include <stdint.h>
 
enum pull_enable {
        GPIO_PULL_DISABLE = 0,
        GPIO_PULL_ENABLE = 1,
};
 
enum pull_select {
        GPIO_PULL_DOWN = 0,
        GPIO_PULL_UP = 1,
};
 
/*
 * GPIO DRIVING
 * Special IO(I2C, HDMI...) advanced drive strength:
 * GPIO_DRV_ADV_125_UA: 0.125mA
 * GPIO_DRV_ADV_250_UA: 0.25mA
 * GPIO_DRV_ADV_500_UA: 0.5mA
 * GPIO_DRV_ADV_1_MA: 1mA
 */
enum gpio_drv_adv {
        GPIO_DRV_ADV_125_UA = 0,
        GPIO_DRV_ADV_250_UA = 1,
        GPIO_DRV_ADV_500_UA = 2,
        GPIO_DRV_ADV_1_MA = 3,
};
 
struct gpio_drv_info {
        uint32_t offset;
        uint8_t shift;
        uint8_t width;
};
 
void gpio_set_pull(gpio_t gpio, enum pull_enable enable,
                   enum pull_select select);
void gpio_set_mode(gpio_t gpio, int mode);
 
/* Normal driving function */
int gpio_set_driving(gpio_t gpio, uint8_t drv);
int gpio_get_driving(gpio_t gpio);
 
/* Advanced driving function */
int gpio_set_driving_adv(gpio_t gpio, enum gpio_drv_adv drv);
int gpio_get_driving_adv(gpio_t gpio);
 
enum gpio_irq_type {
        IRQ_TYPE_EDGE_RISING,
        IRQ_TYPE_EDGE_FALLING,
        IRQ_TYPE_LEVEL_HIGH,
        IRQ_TYPE_LEVEL_LOW,
};
 
struct eint_section {
        uint32_t        regs[7];
        uint32_t        align1[9];
};
 
struct eint_regs {
        struct eint_section sta;
        struct eint_section ack;
        struct eint_section mask;
        struct eint_section mask_set;
        struct eint_section mask_clr;
        struct eint_section sens;
        struct eint_section sens_set;
        struct eint_section sens_clr;
        struct eint_section soft;
        struct eint_section soft_set;
        struct eint_section soft_clr;
        struct eint_section rsv00;
        struct eint_section pol;
        struct eint_section pol_set;
        struct eint_section pol_clr;
        struct eint_section rsv01;
        uint32_t            d0en[7];
        uint32_t            rsv02;
        uint32_t            d1en[7];
};
 
check_member(eint_regs, d1en, 0x420);
 
static struct eint_regs *const mtk_eint = (void *)(EINT_BASE);
 
/*
 * Firmware never enables interrupts on this platform.  This function
 * reads current EINT status and clears the pending interrupt.
 *
 * Returns 1 if the interrupt was pending, else 0.
 */
int gpio_eint_poll(gpio_t gpio);
 
/*
 * Configure a GPIO to handle external interrupts (EINT) of given irq type.
 */
void gpio_eint_configure(gpio_t gpio, enum gpio_irq_type type);
 
#endif