1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
diff -Nur linux-2.6.15.1/drivers/char/watchdog/wdt_merlot.c linux-2.6.15.1-openwrt/drivers/char/watchdog/wdt_merlot.c
--- linux-2.6.15.1/drivers/char/watchdog/wdt_merlot.c 2006-01-26 21:14:02.204626250 -0800
+++ linux-2.6.15.1-openwrt/drivers/char/watchdog/wdt_merlot.c 2006-02-02 20:31:43.000000000 -0800
@@ -0,0 +1,141 @@
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/bootinfo.h>
+
+// refresh the watchdog timer for this many seconds in kernel
+// before letting the watchdog process take over.
+#define WDT_COUNT 60
+
+extern unsigned long mips_machtype;
+
+static unsigned long wdt_is_open;
+static struct timer_list wdt_timer;
+static int wdt_count = WDT_COUNT;
+
+static void wdt_merlot_refresh(void){
+ volatile __u32 *wdt;
+ switch (mips_machtype) {
+ case MACH_ARUBA_AP70:
+ wdt = (__u32 *)0xb8030034;
+ *wdt = 0x10000000;
+ break;
+ default:
+ wdt = (__u32 *)0xbc00300c;
+ *wdt = 0x40000000;
+ break;
+ }
+}
+
+static void wdt_merlot_disable()
+{
+ volatile __u32 *wdt_errcs;
+ volatile __u32 *wdt_wtc;
+ volatile __u32 *wdt_ctl;
+ volatile __u32 val ;
+
+ switch (mips_machtype) {
+ case MACH_ARUBA_AP70:
+ wdt_errcs = (__u32 *)0xb8030030 ;
+ wdt_wtc = (__u32 *)0xb803003c ;
+ val = *wdt_errcs ;
+ val &= ~0x201 ;
+ *wdt_errcs = val ;
+ val = *wdt_wtc ;
+ val &= ~0x1 ;
+ *wdt_wtc = val ;
+ break;
+ default:
+ wdt_ctl = (__u32 *)0xbc003008;
+ *wdt_ctl = 0 ;
+ break;
+ }
+}
+
+static void wdt_merlot_timer_fn(unsigned long data){
+
+ wdt_merlot_refresh();
+ if (--wdt_count >= 0)
+ mod_timer(&wdt_timer, jiffies + HZ);
+ else
+ wdt_merlot_disable();
+
+}
+
+static int wdt_merlot_setup_timer(void){
+
+ init_timer(&wdt_timer);
+ wdt_timer.function = wdt_merlot_timer_fn;
+ wdt_timer.data = 0;
+ wdt_timer.expires = jiffies + HZ;
+ add_timer(&wdt_timer);
+ return 0;
+}
+
+static int wdt_open(struct inode *inode, struct file *file)
+{
+ if(test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+ wdt_count=0;
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ if (count) { /* something was written */
+ wdt_merlot_refresh();
+ }
+ return count;
+}
+
+static int wdt_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &wdt_is_open);
+ return 0;
+}
+
+static struct file_operations wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wdt_write,
+ .open = wdt_open,
+ .release = wdt_release,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+static void __exit wdt_exit(void)
+{
+ misc_deregister(&wdt_miscdev);
+}
+
+static int __init wdt_init(void)
+{
+ int ret;
+ ret = misc_register(&wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ misc_deregister(&wdt_miscdev);
+ goto out;
+ }
+ printk("wdt: registered with refresh\n");
+ wdt_merlot_refresh();
+ wdt_merlot_setup_timer();
+out:
+ return ret;
+}
+
+module_init(wdt_init);
+module_exit(wdt_exit);
diff -Nur linux-2.6.15.3/drivers/char/watchdog/Makefile linux-2.6.15.3-openwrt/drivers/char/watchdog/Makefile
--- linux-2.6.15.3/drivers/char/watchdog/Makefile 2006-02-22 10:04:18.596278000 -0800
+++ linux-2.6.15.3-openwrt/drivers/char/watchdog/Makefile 2006-02-22 10:06:21.400960000 -0800
@@ -71,5 +71,8 @@
# SPARC64 Architecture
+# Aruba Architecture
+obj-$(CONFIG_MACH_ARUBA) += wdt_merlot.o
+
# Architecture Independant
obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
|
