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/*
* (C) Copyright 2004, Li-Pro.Net <www.li-pro.net>
* Stephan Linz <linz@li-pro.net>
*
* 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 <command.h>
#include <nios.h>
#include <nios-io.h>
#if defined(CONFIG_HW_WATCHDOG)
#if !defined(CONFIG_HW_WDENA_BASE)
#error "*** CONFIG_HW_WDENA_BASE not defined ***"
#if !defined(CONFIG_HW_WDENA_BIT)
#error "*** CONFIG_HW_WDENA_BIT not defined ***"
#endif
#endif
#if !defined(CONFIG_HW_WDTOG_BASE)
#error "*** CONFIG_HW_WDTOG_BASE not defined ***"
#if !defined(CONFIG_HW_WDTOG_BIT)
#error "*** CONFIG_HW_WDTOG_BIT not defined ***"
#endif
#endif
#ifdef CONFIG_HW_WDPORT_WRONLY /* emulate read access */
static unsigned __wd_ena_pio_portval = 0;
#endif
#define WD_PIO_INIT_DONE(V) ((V) & (1 << CONFIG_HW_WDENA_BIT))
void ssv_wd_pio_init(void)
{
nios_pio_t *ena_piop = (nios_pio_t*)CONFIG_HW_WDENA_BASE;
nios_pio_t *trg_piop = (nios_pio_t*)CONFIG_HW_WDTOG_BASE;
trg_piop->data &= ~(1 << CONFIG_HW_WDTOG_BIT);
#ifdef CONFIG_HW_WDPORT_WRONLY /* emulate read access */
__wd_ena_pio_portval |= (1 << CONFIG_HW_WDENA_BIT);
ena_piop->data = __wd_ena_pio_portval;
#else /* !CONFIG_HW_WDPORT_WRONLY */
trg_piop->direction |= (1 << CONFIG_HW_WDTOG_BIT);
ena_piop->data |= (1 << CONFIG_HW_WDENA_BIT);
ena_piop->direction |= (1 << CONFIG_HW_WDENA_BIT);
#endif /* CONFIG_HW_WDPORT_WRONLY */
}
void ssv_wd_pio_done(void)
{
nios_pio_t *piop = (nios_pio_t*)CONFIG_HW_WDENA_BASE;
#ifdef CONFIG_HW_WDPORT_WRONLY /* emulate read access */
__wd_ena_pio_portval &= ~(1 << CONFIG_HW_WDENA_BIT);
piop->data = __wd_ena_pio_portval;
#else /* !CONFIG_HW_WDPORT_WRONLY */
piop->data &= ~(1 << CONFIG_HW_WDENA_BIT);
#endif /* CONFIG_HW_WDPORT_WRONLY */
}
void ssv_wd_pio_reset(void)
{
nios_pio_t *trg_piop = (nios_pio_t*)CONFIG_HW_WDTOG_BASE;
#ifdef CONFIG_HW_WDPORT_WRONLY
if (WD_PIO_INIT_DONE(__wd_ena_pio_portval))
#else
nios_pio_t *ena_piop = (nios_pio_t*)CONFIG_HW_WDENA_BASE;
if (WD_PIO_INIT_DONE(ena_piop->data))
#endif
{
trg_piop->data |= (1 << CONFIG_HW_WDTOG_BIT);
trg_piop->data &= ~(1 << CONFIG_HW_WDTOG_BIT);
}
}
void hw_watchdog_reset(void)
{
int re_enable = disable_interrupts ();
ssv_wd_pio_reset();
if (re_enable)
enable_interrupts ();
}
#if defined(CONFIG_CMD_BSP)
int do_wd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
nios_pio_t *ena_piop = (nios_pio_t*)CONFIG_HW_WDENA_BASE;
switch (argc)
{
case 1:
printf ("Watchdog timer status is %s\n",
#ifdef CONFIG_HW_WDPORT_WRONLY
WD_PIO_INIT_DONE(__wd_ena_pio_portval)
#else
WD_PIO_INIT_DONE(ena_piop->data)
#endif
? "on" : "off");
return 0;
case 2:
if (!strcmp(argv[1],"on"))
{
ssv_wd_pio_init();
printf("Watchdog timer now is on\n");
return 0;
}
else if (!strcmp(argv[1],"off"))
{
ssv_wd_pio_done();
printf("Watchdog timer now is off\n");
return 0;
}
break;
default:
break;
}
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
U_BOOT_CMD(
wd, 2, 1, do_wd,
"wd - check and set watchdog\n",
"on - switch watchDog on\n"
"wd off - switch watchdog off\n"
"wd - print current status\n"
);
#endif /* CFG_CMD_BSP */
#endif /* CONFIG_HW_WATCHDOG */
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