/*
 * Copyright (C) 2023 Gunar Schorcht <gunar@schorcht.net>
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */

/**
 * @ingroup     cpu_gd32v
 * @ingroup     drivers_periph_gpio_ll
 * @{
 *
 * @file
 * @brief       GPIO Low-level API implementation for the GD32V GPIO peripheral
 *
 * @author      Gunar Schorcht <gunar@schorcht.net>
 */

#ifndef GPIO_LL_ARCH_H
#define GPIO_LL_ARCH_H

#include "architecture.h"
#include "periph/gpio_ll.h"
#include "periph_cpu.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifndef DOXYGEN /* hide implementation specific details from Doxygen */

/**
 * @brief   Number of ports available on GD32VF103
 */
#define GPIO_PORT_NUMOF 5

/**
 * @brief   Get a GPIO port by number
 */
#define GPIO_PORT(num)      (GPIOA_BASE + ((num) << 10))

/**
 * @brief   Get a GPIO port number by gpio_t value
 */
#define GPIO_PORT_NUM(port) (((port) - GPIOA_BASE) >> 10)

static inline uword_t gpio_ll_read(gpio_port_t port)
{
    return ((GPIO_Type *)port)->ISTAT;
}

static inline uword_t gpio_ll_read_output(gpio_port_t port)
{
    return ((GPIO_Type *)port)->OCTL;
}

static inline void gpio_ll_set(gpio_port_t port, uword_t mask)
{
    ((GPIO_Type *)port)->BOP = mask;
}

static inline void gpio_ll_clear(gpio_port_t port, uword_t mask)
{
    ((GPIO_Type *)port)->BOP = mask << 16;
}

static inline void gpio_ll_toggle(gpio_port_t port, uword_t mask)
{
    unsigned irq_state = irq_disable();
    ((GPIO_Type *)port)->OCTL ^= mask;
    irq_restore(irq_state);
}

static inline void gpio_ll_write(gpio_port_t port, uword_t value)
{
    ((GPIO_Type *)port)->OCTL = value;
}

static inline gpio_port_t gpio_get_port(gpio_t pin)
{
    return pin & 0xfffffff0UL;
}

static inline uint8_t gpio_get_pin_num(gpio_t pin)
{
    return pin & 0xfUL;
}

static inline gpio_port_t gpio_port_pack_addr(void *addr)
{
    return (gpio_port_t)addr;
}

static inline void * gpio_port_unpack_addr(gpio_port_t port)
{
    if (port < GPIOA_BASE) {
        return (void *)port;
    }

    return NULL;
}

static inline bool is_gpio_port_num_valid(uint_fast8_t num)
{
    return num < GPIO_PORT_NUMOF;
}

#endif /* DOXYGEN */

#ifdef __cplusplus
}
#endif

#endif /* GPIO_LL_ARCH_H */
/** @} */