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/*
* (C) Copyright 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
* (C) Copyright 2012 Renesas Solutions Corp.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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; either version 2 of
* the License, or (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch-armv7/globaltimer.h>
#include <asm/arch/rmobile.h>
static struct globaltimer *global_timer = \
(struct globaltimer *)GLOBAL_TIMER_BASE_ADDR;
#define CLK2MHZ(clk) (clk / 1000 / 1000)
static u64 get_cpu_global_timer(void)
{
u32 low, high;
u64 timer;
u32 old = readl(&global_timer->cnt_h);
while (1) {
low = readl(&global_timer->cnt_l);
high = readl(&global_timer->cnt_h);
if (old == high)
break;
else
old = high;
}
timer = high;
return (u64)((timer << 32) | low);
}
static u64 get_time_us(void)
{
u64 timer = get_cpu_global_timer();
timer = ((timer << 2) + (CLK2MHZ(CONFIG_SYS_CPU_CLK) >> 1));
timer /= (u64)CLK2MHZ(CONFIG_SYS_CPU_CLK);
return timer;
}
static ulong get_time_ms(void)
{
return (ulong)(get_time_us() / 1000);
}
int timer_init(void)
{
writel(0x01, &global_timer->ctl);
return 0;
}
void __udelay(unsigned long usec)
{
u64 start, current;
u64 wait;
start = get_cpu_global_timer();
wait = (u64)((usec * CLK2MHZ(CONFIG_SYS_CPU_CLK)) >> 2);
do {
current = get_cpu_global_timer();
} while ((current - start) < wait);
}
ulong get_timer(ulong base)
{
return get_time_ms() - base;
}
unsigned long long get_ticks(void)
{
return get_cpu_global_timer();
}
ulong get_tbclk(void)
{
return (ulong)(CONFIG_SYS_CPU_CLK >> 2);
}
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