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TsiChung Liew8e585f02007-06-18 13:50:13 -05001/*
2 *
3 * (C) Copyright 2000-2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
6 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
7 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
8 *
9 * See file CREDITS for list of people who contributed to this
10 * project.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * MA 02111-1307 USA
26 */
27
28#include <common.h>
29#include <watchdog.h>
30#include <command.h>
31
TsiChungLiew7a17e752007-07-05 23:01:22 -050032#include <asm/immap.h>
TsiChung Liew8e585f02007-06-18 13:50:13 -050033
Wolfgang Denk1218abf2007-09-15 20:48:41 +020034DECLARE_GLOBAL_DATA_PTR;
35
TsiChung Liew8e585f02007-06-18 13:50:13 -050036int do_reset(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
37{
38 volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
39
40 wdp->cr = 0;
41 udelay(1000);
42
43 /* enable watchdog, set timeout to 0 and wait */
44 wdp->cr = WTM_WCR_EN;
45 while (1) ;
46
47 /* we don't return! */
48 return 0;
49};
50
51int checkcpu(void)
52{
TsiChung Liew8e585f02007-06-18 13:50:13 -050053 volatile ccm_t *ccm = (ccm_t *) MMAP_CCM;
54 u16 msk;
55 u16 id = 0;
56 u8 ver;
57
58 puts("CPU: ");
59 msk = (ccm->cir >> 6);
60 ver = (ccm->cir & 0x003f);
61 switch (msk) {
62 case 0x54:
63 id = 5329;
64 break;
65 case 0x59:
66 id = 5328;
67 break;
68 case 0x61:
69 id = 5327;
70 break;
71 }
72
73 if (id) {
74 printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk,
75 ver);
76 printf(" CPU CLK %d Mhz BUS CLK %d Mhz\n",
77 (int)(gd->cpu_clk / 1000000),
78 (int)(gd->bus_clk / 1000000));
79 }
80
81 return 0;
82};
83
84#if defined(CONFIG_WATCHDOG)
85/* Called by macro WATCHDOG_RESET */
86void watchdog_reset(void)
87{
88 volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
89
90 wdp->sr = 0x5555; /* Count register */
91}
92
93int watchdog_disable(void)
94{
95 volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
96
97 /* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
98 wdp->cr |= WTM_WCR_HALTED; /* halted watchdog timer */
99
100 puts("WATCHDOG:disabled\n");
101 return (0);
102}
103
104int watchdog_init(void)
105{
106 volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
107 u32 wdog_module = 0;
108
109 /* set timeout and enable watchdog */
110 wdog_module = ((CFG_CLK / 1000) * CONFIG_WATCHDOG_TIMEOUT);
111 wdog_module |= (wdog_module / 8192);
112 wdp->mr = wdog_module;
113
114 wdp->cr = WTM_WCR_EN;
115 puts("WATCHDOG:enabled\n");
116
117 return (0);
118}
TsiChungLiew7a17e752007-07-05 23:01:22 -0500119#endif /* CONFIG_WATCHDOG */