| /* |
| * INCA-IP Watchdog timer management code. |
| * |
| * Copyright (c) 2003 Wolfgang Denk <wd@denx.de> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| |
| #include <config.h> |
| #include <asm/regdef.h> |
| |
| |
| #define WD_BASE 0xb8000000 |
| #define WD_CON0(value) 0x0020(value) |
| #define WD_CON1(value) 0x0024(value) |
| #define WD_DISABLE 0x00000008 |
| #define WD_ENABLE 0x00000000 |
| #define WD_WRITE_PW 0xFFFC00F8 |
| #define WD_WRITE_ENDINIT 0xFFFC00F3 |
| #define WD_WRITE_INIT 0xFFFC00F2 |
| |
| |
| .globl disable_incaip_wdt |
| disable_incaip_wdt: |
| li t0, WD_BASE |
| |
| /* Calculate password. |
| */ |
| lw t2, WD_CON1(t0) |
| and t2, 0xC |
| |
| lw t3, WD_CON0(t0) |
| and t3, 0xFFFFFF01 |
| |
| or t3, t2 |
| or t3, 0xF0 |
| |
| sw t3, WD_CON0(t0) /* write password */ |
| |
| /* Clear ENDINIT. |
| */ |
| li t1, WD_WRITE_INIT |
| sw t1, WD_CON0(t0) |
| |
| |
| li t1, WD_DISABLE |
| sw t1, WD_CON1(t0) /* disable watchdog */ |
| li t1, WD_WRITE_PW |
| sw t1, WD_CON0(t0) /* write password */ |
| li t1, WD_WRITE_ENDINIT |
| sw t1, WD_CON0(t0) /* end command */ |
| |
| jr ra |
| nop |
