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/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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 <watchdog.h>
#ifdef CONFIG_M5272
#include <asm/m5272.h>
#endif
#ifdef CONFIG_M5282
#include <asm/m5282.h>
#endif
#include <asm/mcftimer.h>
#include <asm/processor.h>
#include <commproc.h>
static ulong timestamp;
static unsigned short lastinc;
void coldfire_timer_init (void)
{
volatile unsigned short *timerp;
timerp = (volatile unsigned short *) (MCF_MBAR + MCFTIMER_BASE4);
timestamp = 0;
#ifdef CONFIG_M5272
/* Set up TIMER 4 as poll clock */
timerp[MCFTIMER_TMR] = MCFTIMER_TMR_DISABLE;
timerp[MCFTIMER_TRR] = lastinc = 0;
timerp[MCFTIMER_TMR] = (65 << 8) | MCFTIMER_TMR_CLK1 |
MCFTIMER_TMR_FREERUN | MCFTIMER_TMR_ENABLE;
#endif
#ifdef CONFIG_M5282
/* Set up TIMER 4 as poll clock */
timerp[MCFTIMER_PCSR] = MCFTIMER_PCSR_OVW;
timerp[MCFTIMER_PMR] = lastinc = 0;
timerp[MCFTIMER_PCSR] =
(5 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
#endif
}
void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
{
}
void irq_free_handler (int vec)
{
}
int interrupt_init (void)
{
coldfire_timer_init ();
return 0;
}
void enable_interrupts ()
{
}
int disable_interrupts ()
{
return 0;
}
void set_timer (ulong t)
{
volatile unsigned short *timerp;
timerp = (volatile unsigned short *) (MCF_MBAR + MCFTIMER_BASE4);
timestamp = 0;
#ifdef CONFIG_M5272
timerp[MCFTIMER_TRR] = lastinc = 0;
#endif
#ifdef CONFIG_M5282
timerp[MCFTIMER_PMR] = lastinc = 0;
#endif
}
ulong get_timer (ulong base)
{
unsigned short now, diff;
volatile unsigned short *timerp;
timerp = (volatile unsigned short *) (MCF_MBAR + MCFTIMER_BASE4);
#ifdef CONFIG_M5272
now = timerp[MCFTIMER_TCN];
diff = (now - lastinc);
#endif
#ifdef CONFIG_M5282
now = timerp[MCFTIMER_PCNTR];
diff = -(now - lastinc);
#endif
timestamp += diff;
lastinc = now;
return timestamp - base;
}
void wait_ticks (unsigned long ticks)
{
set_timer (0);
while (get_timer (0) < ticks);
}
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