/*
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2019 Western Digital Corporation or its affiliates.
 *
 * Authors:
 *   Damien Le Moal <damien.lemoal@wdc.com>
 */

#include <sbi/riscv_encoding.h>
#include <sbi/sbi_const.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_console.h>
#include <plat/irqchip/plic.h>
#include <plat/sys/clint.h>
#include "platform.h"
#include "uarths.h"

#define K210_UART_BAUDRATE		115200

static int k210_console_init(void)
{
	uarths_init(K210_UART_BAUDRATE, UARTHS_STOP_1);

	return 0;
}

static void k210_console_putc(char c)
{
	uarths_putc(c);
}

static int k210_console_getc(void)
{
	return uarths_getc();
}

static int k210_irqchip_init(bool cold_boot)
{
	int rc;
	u32 hartid = sbi_current_hartid();

	if (cold_boot) {
		rc = plic_cold_irqchip_init(PLIC_BASE_ADDR,
					    PLIC_NUM_SOURCES,
					    K210_HART_COUNT);
		if (rc)
			return rc;
	}

	return plic_warm_irqchip_init(hartid,
				      (2 * hartid),
				      (2 * hartid + 1));
}

static int k210_ipi_init(bool cold_boot)
{
	int rc;

	if (cold_boot) {
		rc = clint_cold_ipi_init(CLINT_BASE_ADDR,
					 K210_HART_COUNT);
		if (rc)
			return rc;
	}

	return clint_warm_ipi_init();
}

static int k210_timer_init(bool cold_boot)
{
	int rc;

	if (cold_boot) {
		rc = clint_cold_timer_init(CLINT_BASE_ADDR,
					   K210_HART_COUNT);
		if (rc)
			return rc;
	}

	return clint_warm_timer_init();
}

static int k210_system_reboot(u32 type)
{
	/* For now nothing to do. */
	sbi_printf("System reboot\n");

	return 0;
}

static int k210_system_shutdown(u32 type)
{
	/* For now nothing to do. */
	sbi_printf("System shutdown\n");

	return 0;
}

struct sbi_platform platform = {

	.name = "Kendryte K210",
	.features = SBI_PLATFORM_HAS_TIMER_VALUE,

	.hart_count = K210_HART_COUNT,
	.hart_stack_size = K210_HART_STACK_SIZE,
	.disabled_hart_mask = 0,

	.console_init = k210_console_init,
	.console_putc = k210_console_putc,
	.console_getc = k210_console_getc,

	.irqchip_init = k210_irqchip_init,

	.ipi_init = k210_ipi_init,
	.ipi_send = clint_ipi_send,
	.ipi_sync = clint_ipi_sync,
	.ipi_clear = clint_ipi_clear,

	.timer_init = k210_timer_init,
	.timer_value = clint_timer_value,
	.timer_event_stop = clint_timer_event_stop,
	.timer_event_start = clint_timer_event_start,

	.system_reboot = k210_system_reboot,
	.system_shutdown = k210_system_shutdown
};