]>
git.ipfire.org Git - people/ms/u-boot.git/blob - board/ssv/common/wd_pio.c
2 * (C) Copyright 2004, Li-Pro.Net <www.li-pro.net>
3 * Stephan Linz <linz@li-pro.net>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #if defined(CONFIG_HW_WATCHDOG)
31 #if !defined(CONFIG_HW_WDENA_BASE)
32 #error "*** CONFIG_HW_WDENA_BASE not defined ***"
33 #if !defined(CONFIG_HW_WDENA_BIT)
34 #error "*** CONFIG_HW_WDENA_BIT not defined ***"
38 #if !defined(CONFIG_HW_WDTOG_BASE)
39 #error "*** CONFIG_HW_WDTOG_BASE not defined ***"
40 #if !defined(CONFIG_HW_WDTOG_BIT)
41 #error "*** CONFIG_HW_WDTOG_BIT not defined ***"
45 #ifdef CONFIG_HW_WDPORT_WRONLY /* emulate read access */
46 static unsigned __wd_ena_pio_portval
= 0;
49 #define WD_PIO_INIT_DONE(V) ((V) & (1 << CONFIG_HW_WDENA_BIT))
51 void ssv_wd_pio_init(void)
53 nios_pio_t
*ena_piop
= (nios_pio_t
*)CONFIG_HW_WDENA_BASE
;
54 nios_pio_t
*trg_piop
= (nios_pio_t
*)CONFIG_HW_WDTOG_BASE
;
56 trg_piop
->data
&= ~(1 << CONFIG_HW_WDTOG_BIT
);
58 #ifdef CONFIG_HW_WDPORT_WRONLY /* emulate read access */
60 __wd_ena_pio_portval
|= (1 << CONFIG_HW_WDENA_BIT
);
61 ena_piop
->data
= __wd_ena_pio_portval
;
63 #else /* !CONFIG_HW_WDPORT_WRONLY */
65 trg_piop
->direction
|= (1 << CONFIG_HW_WDTOG_BIT
);
67 ena_piop
->data
|= (1 << CONFIG_HW_WDENA_BIT
);
68 ena_piop
->direction
|= (1 << CONFIG_HW_WDENA_BIT
);
70 #endif /* CONFIG_HW_WDPORT_WRONLY */
73 void ssv_wd_pio_done(void)
75 nios_pio_t
*piop
= (nios_pio_t
*)CONFIG_HW_WDENA_BASE
;
77 #ifdef CONFIG_HW_WDPORT_WRONLY /* emulate read access */
79 __wd_ena_pio_portval
&= ~(1 << CONFIG_HW_WDENA_BIT
);
80 piop
->data
= __wd_ena_pio_portval
;
82 #else /* !CONFIG_HW_WDPORT_WRONLY */
84 piop
->data
&= ~(1 << CONFIG_HW_WDENA_BIT
);
86 #endif /* CONFIG_HW_WDPORT_WRONLY */
89 void ssv_wd_pio_reset(void)
91 nios_pio_t
*trg_piop
= (nios_pio_t
*)CONFIG_HW_WDTOG_BASE
;
93 #ifdef CONFIG_HW_WDPORT_WRONLY
94 if (WD_PIO_INIT_DONE(__wd_ena_pio_portval
))
96 nios_pio_t
*ena_piop
= (nios_pio_t
*)CONFIG_HW_WDENA_BASE
;
98 if (WD_PIO_INIT_DONE(ena_piop
->data
))
101 trg_piop
->data
|= (1 << CONFIG_HW_WDTOG_BIT
);
102 trg_piop
->data
&= ~(1 << CONFIG_HW_WDTOG_BIT
);
106 void hw_watchdog_reset(void)
108 int re_enable
= disable_interrupts ();
112 enable_interrupts ();
115 #if defined(CONFIG_CMD_BSP)
116 int do_wd (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
118 nios_pio_t
*ena_piop
= (nios_pio_t
*)CONFIG_HW_WDENA_BASE
;
123 printf ("Watchdog timer status is %s\n",
124 #ifdef CONFIG_HW_WDPORT_WRONLY
125 WD_PIO_INIT_DONE(__wd_ena_pio_portval
)
127 WD_PIO_INIT_DONE(ena_piop
->data
)
132 if (!strcmp(argv
[1],"on"))
135 printf("Watchdog timer now is on\n");
138 else if (!strcmp(argv
[1],"off"))
141 printf("Watchdog timer now is off\n");
148 printf ("Usage:\n%s\n", cmdtp
->usage
);
154 "wd - check and set watchdog\n",
155 "on - switch watchDog on\n"
156 "wd off - switch watchdog off\n"
157 "wd - print current status\n"
160 #endif /* CONFIG_HW_WATCHDOG */