coreboot-kgpe-d16/src/soc/rockchip/rk3288/timer.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright 2014 Rockchip Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <arch/io.h>
#include <delay.h>
#include <soc/timer.h>
#include <stdint.h>
#include <timer.h>

static uint64_t timer_raw_value(void)
{
	uint64_t value0;
	uint64_t value1;

	value0 = (uint64_t)read32(&timer7_ptr->timer_curr_value0);
	value1 = (uint64_t)read32(&timer7_ptr->timer_curr_value1);
	value0 = value0 | value1<<32;
	return value0;
}

void timer_monotonic_get(struct mono_time *mt)
{
	mono_time_set_usecs(mt, timer_raw_value() / clocks_per_usec);
}

void init_timer(void)
{
	writel(TIMER_LOAD_VAL, &timer7_ptr->timer_load_count0);
	writel(TIMER_LOAD_VAL, &timer7_ptr->timer_load_count1);
	writel(1, &timer7_ptr->timer_ctrl_reg);
}