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--- linux/arch/mips/au1000/mtx-1/mtx-1_watchdog.c.orig 2005-03-22 17:18:01.000000000 +0100
+++ linux/arch/mips/au1000/mtx-1/mtx-1_watchdog.c 2005-07-06 12:10:06.000000000 +0200
@@ -39,6 +39,7 @@
#include <linux/watchdog.h>
#include <linux/slab.h>
#include <linux/init.h>
+#include <asm/uaccess.h>
#include <asm/au1000.h>
@@ -115,6 +116,8 @@
//---------[ File Functions ]-----------------
+static char restart_after_close;
+
static int mtx1wd_open (struct inode *inode, struct file *file)
{
if (MINOR(inode->i_rdev)!=WATCHDOG_MINOR) return -ENODEV;
@@ -134,6 +137,10 @@
static int mtx1wd_release (struct inode *inode, struct file *file) {
if (MINOR(inode->i_rdev)==WATCHDOG_MINOR) {
+
+ if (restart_after_close)
+ start_wd_timer ();
+
}
MOD_DEC_USE_COUNT;
return 0;
@@ -141,22 +148,53 @@
static ssize_t mtx1wd_write (struct file *file, const char *buf, size_t count, loff_t *ppos) {
- if (ppos!=&file->f_pos)
- return -ESPIPE;
- if (count) {
mtx1_trigger_wd ();
- return 1;
+
+ if (count > 0) {
+ char buffer[10];
+ int n = (count>9)?9:count;
+
+ if (copy_from_user (&buffer, buf, n))
+ return -EFAULT;
+ buffer[n]=0;
+
+ if (count >= 4 && strncmp("auto", buffer, 4)==0)
+ restart_after_close = 1;
+
+ else if (count >= 6 && strncmp("manual", buffer, 6)==0)
+ restart_after_close = 0;
+
+ return n;
}
return 0;
}
+static ssize_t mtx1wd_read (struct file *file, char *buf, size_t count, loff_t *ppos)
+{
+ char * state = restart_after_close ? "auto\n" : "manual\n";
+ int n = strlen(state)+1;
+
+ if (file->f_pos >= n)
+ return 0;
+
+ if (count < n)
+ return -EINVAL;
+
+ if(copy_to_user(buf, state, n))
+ return -EFAULT;
+
+ file->f_pos += n;
+
+ return n;
+}
+
static struct file_operations mtx1wd_fops = {
.owner = THIS_MODULE,
.llseek = NULL,
- .read = NULL,
+ .read = mtx1wd_read,
.write = mtx1wd_write,
.readdir = NULL,
.poll = NULL,
@@ -194,6 +232,8 @@
{
printk("MTX-1 watchdog driver\n");
+ restart_after_close = 0;
+
mtx1_enable_wd ();
//-- trigger it for the first time.
|
