/* Copyright (c) 2021 Intel Corporation
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/device.h>
#include <xtensa/xtruntime.h>
#include <zephyr/irq_nextlevel.h>
#include <xtensa/hal.h>
#include <zephyr/init.h>
#include <zephyr/logging/log.h>

#include <cavs-shim.h>
#include <cavs-idc.h>
#include "soc.h"

#ifdef CONFIG_DYNAMIC_INTERRUPTS
#include <zephyr/sw_isr_table.h>
#endif

LOG_MODULE_DECLARE(soc, CONFIG_SOC_LOG_LEVEL);

#define CAVS_INTC_NODE(n) DT_INST(n, intel_cavs_intc)

void z_soc_irq_enable(uint32_t irq)
{
	const struct device *dev_cavs;

	switch (XTENSA_IRQ_NUMBER(irq)) {
	case DT_IRQN(CAVS_INTC_NODE(0)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(0)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(1)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(1)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(2)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(2)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(3)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(3)));
		break;
	default:
		/* regular interrupt */
		z_xtensa_irq_enable(XTENSA_IRQ_NUMBER(irq));
		return;
	}

	if (!dev_cavs) {
		LOG_DBG("board: CAVS device binding failed");
		return;
	}

	/*
	 * The specified interrupt is in CAVS interrupt controller.
	 * So enable core interrupt first.
	 */
	z_xtensa_irq_enable(XTENSA_IRQ_NUMBER(irq));

	/* Then enable the interrupt in CAVS interrupt controller */
	irq_enable_next_level(dev_cavs, CAVS_IRQ_NUMBER(irq));
}

void z_soc_irq_disable(uint32_t irq)
{
	const struct device *dev_cavs;

	switch (XTENSA_IRQ_NUMBER(irq)) {
	case DT_IRQN(CAVS_INTC_NODE(0)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(0)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(1)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(1)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(2)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(2)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(3)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(3)));
		break;
	default:
		/* regular interrupt */
		z_xtensa_irq_disable(XTENSA_IRQ_NUMBER(irq));
		return;
	}

	if (!dev_cavs) {
		LOG_DBG("board: CAVS device binding failed");
		return;
	}

	/*
	 * The specified interrupt is in CAVS interrupt controller.
	 * So disable the interrupt in CAVS interrupt controller.
	 */
	irq_disable_next_level(dev_cavs, CAVS_IRQ_NUMBER(irq));

	/* Then disable the parent IRQ if all children are disabled */
	if (!irq_is_enabled_next_level(dev_cavs)) {
		z_xtensa_irq_disable(XTENSA_IRQ_NUMBER(irq));
	}
}

int z_soc_irq_is_enabled(unsigned int irq)
{
	const struct device *dev_cavs;
	int ret = 0;

	switch (XTENSA_IRQ_NUMBER(irq)) {
	case DT_IRQN(CAVS_INTC_NODE(0)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(0)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(1)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(1)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(2)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(2)));
		break;
	case DT_IRQN(CAVS_INTC_NODE(3)):
		dev_cavs = device_get_binding(DT_LABEL(CAVS_INTC_NODE(3)));
		break;
	default:
		/* regular interrupt */
		ret = z_xtensa_irq_is_enabled(XTENSA_IRQ_NUMBER(irq));
		goto out;
	}

	if (!dev_cavs) {
		LOG_DBG("board: CAVS device binding failed");
		ret = -ENODEV;
		goto out;
	}

	/* Then check the interrupt in CAVS interrupt controller */
	ret = irq_line_is_enabled_next_level(dev_cavs, CAVS_IRQ_NUMBER(irq));

out:
	return ret;
}

#ifdef CONFIG_DYNAMIC_INTERRUPTS
int z_soc_irq_connect_dynamic(unsigned int irq, unsigned int priority,
			      void (*routine)(const void *parameter),
			      const void *parameter, uint32_t flags)
{
	uint32_t table_idx;
	uint32_t cavs_irq, cavs_idx;
	int ret;

	ARG_UNUSED(flags);
	ARG_UNUSED(priority);

	/* extract 2nd level interrupt number */
	cavs_irq = CAVS_IRQ_NUMBER(irq);
	ret = irq;

	if (cavs_irq == 0) {
		/* Not affecting 2nd level interrupts */
		z_isr_install(irq, routine, parameter);
		goto irq_connect_out;
	}

	/* Figure out the base index. */
	switch (XTENSA_IRQ_NUMBER(irq)) {
	case DT_IRQN(CAVS_INTC_NODE(0)):
		cavs_idx = 0;
		break;
	case DT_IRQN(CAVS_INTC_NODE(1)):
		cavs_idx = 1;
		break;
	case DT_IRQN(CAVS_INTC_NODE(2)):
		cavs_idx = 2;
		break;
	case DT_IRQN(CAVS_INTC_NODE(3)):
		cavs_idx = 3;
		break;
	default:
		ret = -EINVAL;
		goto irq_connect_out;
	}

	table_idx = CONFIG_CAVS_ISR_TBL_OFFSET +
		CONFIG_MAX_IRQ_PER_AGGREGATOR * cavs_idx;
	table_idx += cavs_irq;

	_sw_isr_table[table_idx].arg = parameter;
	_sw_isr_table[table_idx].isr = routine;

irq_connect_out:
	return ret;
}
#endif