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Code

cleanup watchdog

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@3666 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
mbm 2006-04-17 18:39:32 +00:00
parent 7d4f5a1aef
commit 69de0f2992
1 changed files with 59 additions and 90 deletions
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149
openwrt/target/linux/aruba-2.6/patches/004-wdt.patch
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@ -1,7 +1,7 @@
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 @@
@@ -0,0 +1,110 @@
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
@ -14,131 +14,100 @@ diff -Nur linux-2.6.15.1/drivers/char/watchdog/wdt_merlot.c linux-2.6.15.1-openw
+#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()
+static void wdt_merlot_refresh(void)
+{
+ 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;
+ }
+ 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_timer_fn(unsigned long data){
+
+ wdt_merlot_refresh();
+ if (--wdt_count >= 0)
+ mod_timer(&wdt_timer, jiffies + HZ);
+ else
+ wdt_merlot_disable();
+
+static void wdt_merlot_timer_fn(unsigned long data)
+{
+ wdt_merlot_refresh();
+ if (!test_bit(1, &wdt_is_open))
+ mod_timer(&wdt_timer, jiffies + HZ);
+}
+
+static int wdt_merlot_setup_timer(void){
+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;
+ 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);
+ if (test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+ set_bit(1, &wdt_is_open);
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+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;
+ 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;
+ 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,
+ .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,
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+static void __exit wdt_exit(void)
+{
+ misc_deregister(&wdt_miscdev);
+ 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;
+ 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);