diff options
Diffstat (limited to 'board/ssv/common/wd_pio.c')
| -rw-r--r-- | board/ssv/common/wd_pio.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/board/ssv/common/wd_pio.c b/board/ssv/common/wd_pio.c new file mode 100644 index 0000000..3215ac9 --- /dev/null +++ b/board/ssv/common/wd_pio.c @@ -0,0 +1,160 @@ +/* + * (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 (CONFIG_COMMANDS & CFG_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 */ |