mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 17:07:38 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/*
|
|
* (C) Copyright 2009 Faraday Technology
|
|
* Po-Yu Chuang <ratbert@faraday-tech.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <div64.h>
|
|
#include <asm/io.h>
|
|
#include <faraday/ftpmu010.h>
|
|
#include <faraday/fttmr010.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define TIMER_CLOCK 32768
|
|
#define TIMER_LOAD_VAL 0xffffffff
|
|
|
|
static inline unsigned long long tick_to_time(unsigned long long tick)
|
|
{
|
|
tick *= CONFIG_SYS_HZ;
|
|
do_div(tick, gd->arch.timer_rate_hz);
|
|
|
|
return tick;
|
|
}
|
|
|
|
static inline unsigned long long usec_to_tick(unsigned long long usec)
|
|
{
|
|
usec *= gd->arch.timer_rate_hz;
|
|
do_div(usec, 1000000);
|
|
|
|
return usec;
|
|
}
|
|
|
|
int timer_init(void)
|
|
{
|
|
struct fttmr010 *tmr = (struct fttmr010 *)CONFIG_FTTMR010_BASE;
|
|
unsigned int cr;
|
|
|
|
debug("%s()\n", __func__);
|
|
|
|
/* disable timers */
|
|
writel(0, &tmr->cr);
|
|
|
|
/* use 32768Hz oscillator for RTC, WDT, TIMER */
|
|
ftpmu010_32768osc_enable();
|
|
|
|
/* setup timer */
|
|
writel(TIMER_LOAD_VAL, &tmr->timer3_load);
|
|
writel(TIMER_LOAD_VAL, &tmr->timer3_counter);
|
|
writel(0, &tmr->timer3_match1);
|
|
writel(0, &tmr->timer3_match2);
|
|
|
|
/* we don't want timer to issue interrupts */
|
|
writel(FTTMR010_TM3_MATCH1 |
|
|
FTTMR010_TM3_MATCH2 |
|
|
FTTMR010_TM3_OVERFLOW,
|
|
&tmr->interrupt_mask);
|
|
|
|
cr = readl(&tmr->cr);
|
|
cr |= FTTMR010_TM3_CLOCK; /* use external clock */
|
|
cr |= FTTMR010_TM3_ENABLE;
|
|
writel(cr, &tmr->cr);
|
|
|
|
gd->arch.timer_rate_hz = TIMER_CLOCK;
|
|
gd->arch.tbu = gd->arch.tbl = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Get the current 64 bit timer tick count
|
|
*/
|
|
unsigned long long get_ticks(void)
|
|
{
|
|
struct fttmr010 *tmr = (struct fttmr010 *)CONFIG_FTTMR010_BASE;
|
|
ulong now = TIMER_LOAD_VAL - readl(&tmr->timer3_counter);
|
|
|
|
/* increment tbu if tbl has rolled over */
|
|
if (now < gd->arch.tbl)
|
|
gd->arch.tbu++;
|
|
gd->arch.tbl = now;
|
|
return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl;
|
|
}
|
|
|
|
void __udelay(unsigned long usec)
|
|
{
|
|
unsigned long long start;
|
|
ulong tmo;
|
|
|
|
start = get_ticks(); /* get current timestamp */
|
|
tmo = usec_to_tick(usec); /* convert usecs to ticks */
|
|
while ((get_ticks() - start) < tmo)
|
|
; /* loop till time has passed */
|
|
}
|
|
|
|
/*
|
|
* get_timer(base) can be used to check for timeouts or
|
|
* to measure elasped time relative to an event:
|
|
*
|
|
* ulong start_time = get_timer(0) sets start_time to the current
|
|
* time value.
|
|
* get_timer(start_time) returns the time elapsed since then.
|
|
*
|
|
* The time is used in CONFIG_SYS_HZ units!
|
|
*/
|
|
ulong get_timer(ulong base)
|
|
{
|
|
return tick_to_time(get_ticks()) - base;
|
|
}
|
|
|
|
/*
|
|
* Return the number of timer ticks per second.
|
|
*/
|
|
ulong get_tbclk(void)
|
|
{
|
|
return gd->arch.timer_rate_hz;
|
|
}
|