/*
 * Copyright (c) 2020 - 2021 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include "platform/nrf_802154_gpiote.h"

#include "hal/nrf_gpio.h"
#include "nrf_802154_sl_utils.h"
#include "platform/nrf_802154_irq.h"

static volatile bool m_gpiote_irq_enabled;
static volatile uint32_t m_gpiote_irq_disabled_cnt;

void nrf_802154_gpiote_critical_section_enter(void)
{
	nrf_802154_sl_mcu_critical_state_t mcu_cs;
	uint32_t cnt;

	nrf_802154_sl_mcu_critical_enter(mcu_cs);
	cnt = m_gpiote_irq_disabled_cnt;

	if (cnt == 0U) {
		m_gpiote_irq_enabled = nrf_802154_irq_is_enabled(GPIOTE_IRQn);
		nrf_802154_irq_disable(GPIOTE_IRQn);
	}

	cnt++;
	m_gpiote_irq_disabled_cnt = cnt;

	nrf_802154_sl_mcu_critical_exit(mcu_cs);
}

void nrf_802154_gpiote_critical_section_exit(void)
{
	nrf_802154_sl_mcu_critical_state_t mcu_cs;
	uint32_t cnt;

	nrf_802154_sl_mcu_critical_enter(mcu_cs);

	cnt = m_gpiote_irq_disabled_cnt;
	cnt--;

	if (cnt == 0U) {
		if (m_gpiote_irq_enabled) {
			nrf_802154_irq_enable(GPIOTE_IRQn);
		}
	}

	m_gpiote_irq_disabled_cnt = cnt;

	nrf_802154_sl_mcu_critical_exit(mcu_cs);
}