mirror of
https://github.com/u-boot/u-boot.git
synced 2025-04-24 14:25:56 +00:00
6b7e092793
The davinci_hw_watchdog_ functions are defined but never called from
anywhere. Commit 881ae794b9 ("calimain: remove board") eliminated the
last call to these functions.
Signed-off-by: Emil Kronborg <emil.kronborg@protonmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2003
|
|
* Texas Instruments <www.ti.com>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002-2004
|
|
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
|
|
*
|
|
* (C) Copyright 2004
|
|
* Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
|
|
*
|
|
* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <init.h>
|
|
#include <time.h>
|
|
#include <asm/global_data.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/timer_defs.h>
|
|
#include <div64.h>
|
|
#include <linux/delay.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static struct davinci_timer * const timer =
|
|
(struct davinci_timer *)CFG_SYS_TIMERBASE;
|
|
|
|
#define TIMER_LOAD_VAL 0xffffffff
|
|
|
|
#define TIM_CLK_DIV 16
|
|
|
|
int timer_init(void)
|
|
{
|
|
/* We are using timer34 in unchained 32-bit mode, full speed */
|
|
writel(0x0, &timer->tcr);
|
|
writel(0x0, &timer->tgcr);
|
|
writel(0x06 | ((TIM_CLK_DIV - 1) << 8), &timer->tgcr);
|
|
writel(0x0, &timer->tim34);
|
|
writel(TIMER_LOAD_VAL, &timer->prd34);
|
|
writel(2 << 22, &timer->tcr);
|
|
gd->arch.timer_rate_hz = CFG_SYS_HZ_CLOCK / TIM_CLK_DIV;
|
|
gd->arch.timer_reset_value = 0;
|
|
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Get the current 64 bit timer tick count
|
|
*/
|
|
unsigned long long get_ticks(void)
|
|
{
|
|
unsigned long now = readl(&timer->tim34);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
ulong get_timer(ulong base)
|
|
{
|
|
unsigned long long timer_diff;
|
|
|
|
timer_diff = get_ticks() - gd->arch.timer_reset_value;
|
|
|
|
return lldiv(timer_diff,
|
|
(gd->arch.timer_rate_hz / CONFIG_SYS_HZ)) - base;
|
|
}
|
|
|
|
void __udelay(unsigned long usec)
|
|
{
|
|
unsigned long long endtime;
|
|
|
|
endtime = lldiv((unsigned long long)usec * gd->arch.timer_rate_hz,
|
|
1000000UL);
|
|
endtime += get_ticks();
|
|
|
|
while (get_ticks() < endtime)
|
|
;
|
|
}
|
|
|
|
/*
|
|
* This function is derived from PowerPC code (timebase clock frequency).
|
|
* On ARM it returns the number of timer ticks per second.
|
|
*/
|
|
ulong get_tbclk(void)
|
|
{
|
|
return gd->arch.timer_rate_hz;
|
|
}
|