/*
|
* Watchdog driver for the FTWDT010 Watch Dog Driver
|
*
|
* (c) Copyright 2004 Faraday Technology Corp. (www.faraday-tech.com)
|
* Based on sa1100_wdt.c by Oleg Drokin <green@crimea.edu>
|
* Based on SoftDog driver by Alan Cox <alan@redhat.com>
|
*
|
* Copyright (C) 2011 Andes Technology Corporation
|
* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
|
*
|
* SPDX-License-Identifier: GPL-2.0+
|
*
|
* 27/11/2004 Initial release, Faraday.
|
* 12/01/2011 Port to u-boot, Macpaul Lin.
|
*/
|
|
#include <common.h>
|
#include <watchdog.h>
|
#include <asm/io.h>
|
#include <faraday/ftwdt010_wdt.h>
|
|
/*
|
* Set the watchdog time interval.
|
* Counter is 32 bit.
|
*/
|
int ftwdt010_wdt_settimeout(unsigned int timeout)
|
{
|
unsigned int reg;
|
|
struct ftwdt010_wdt *wd = (struct ftwdt010_wdt *)CONFIG_FTWDT010_BASE;
|
|
debug("Activating WDT..\n");
|
|
/* Check if disabled */
|
if (readl(&wd->wdcr) & ~FTWDT010_WDCR_ENABLE) {
|
printf("sorry, watchdog is disabled\n");
|
return -1;
|
}
|
|
/*
|
* In a 66MHz system,
|
* if you set WDLOAD as 0x03EF1480 (66000000)
|
* the reset timer is 1 second.
|
*/
|
reg = FTWDT010_WDLOAD(timeout * FTWDT010_TIMEOUT_FACTOR);
|
|
writel(reg, &wd->wdload);
|
|
return 0;
|
}
|
|
void ftwdt010_wdt_reset(void)
|
{
|
struct ftwdt010_wdt *wd = (struct ftwdt010_wdt *)CONFIG_FTWDT010_BASE;
|
|
/* clear control register */
|
writel(0, &wd->wdcr);
|
|
/* Write Magic number */
|
writel(FTWDT010_WDRESTART_MAGIC, &wd->wdrestart);
|
|
/* Enable WDT */
|
writel((FTWDT010_WDCR_RST | FTWDT010_WDCR_ENABLE), &wd->wdcr);
|
}
|
|
void ftwdt010_wdt_disable(void)
|
{
|
struct ftwdt010_wdt *wd = (struct ftwdt010_wdt *)CONFIG_FTWDT010_BASE;
|
|
debug("Deactivating WDT..\n");
|
|
/*
|
* It was defined with CONFIG_WATCHDOG_NOWAYOUT in Linux
|
*
|
* Shut off the timer.
|
* Lock it in if it's a module and we defined ...NOWAYOUT
|
*/
|
writel(0, &wd->wdcr);
|
}
|
|
#if defined(CONFIG_HW_WATCHDOG)
|
void hw_watchdog_reset(void)
|
{
|
ftwdt010_wdt_reset();
|
}
|
|
void hw_watchdog_init(void)
|
{
|
/* set timer in ms */
|
ftwdt010_wdt_settimeout(CONFIG_FTWDT010_HW_TIMEOUT * 1000);
|
}
|
#endif
|
