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/*
* (C) Copyright 2009
* Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
* (C) Copyright 2007-2012
* Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <sh_tmu.h>
#define TCR_TPSC 0x07
static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
unsigned long get_tbclk(void)
{
u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
return get_tmu0_clk_rate() >> ((tmu_bit + 1) * 2);
}
unsigned long timer_read_counter(void)
{
return ~readl(&tmu->tcnt0);
}
static void tmu_timer_start(unsigned int timer)
{
if (timer > 2)
return;
writeb(readb(&tmu->tstr) | (1 << timer), &tmu->tstr);
}
static void tmu_timer_stop(unsigned int timer)
{
if (timer > 2)
return;
writeb(readb(&tmu->tstr) & ~(1 << timer), &tmu->tstr);
}
int timer_init(void)
{
u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
writew((readw(&tmu->tcr0) & ~TCR_TPSC) | tmu_bit, &tmu->tcr0);
tmu_timer_stop(0);
tmu_timer_start(0);
return 0;
}
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