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126 lines
3.1 KiB
126 lines
3.1 KiB
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
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--- linux-2.6.15.1/drivers/char/watchdog/wdt_merlot.c 2006-01-26 21:14:02.204626250 -0800
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+++ linux-2.6.15.1-openwrt/drivers/char/watchdog/wdt_merlot.c 2006-02-02 20:31:43.000000000 -0800
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@@ -0,0 +1,110 @@
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+#include <linux/autoconf.h>
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/miscdevice.h>
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+#include <linux/watchdog.h>
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+#include <linux/fs.h>
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+
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+#include <asm/io.h>
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+#include <asm/uaccess.h>
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+#include <asm/system.h>
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+#include <asm/bootinfo.h>
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+
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+extern unsigned long mips_machtype;
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+
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+static unsigned long wdt_is_open;
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+static struct timer_list wdt_timer;
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+
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+static void wdt_merlot_refresh(void)
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+{
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+ volatile __u32 *wdt;
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+ switch (mips_machtype) {
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+ case MACH_ARUBA_AP70:
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+ wdt = (__u32 *) 0xb8030034;
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+ *wdt = 0x10000000;
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+ break;
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+ default:
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+ wdt = (__u32 *) 0xbc00300c;
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+ *wdt = 0x40000000;
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+ break;
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+ }
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+}
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+
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+static void wdt_merlot_timer_fn(unsigned long data)
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+{
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+ wdt_merlot_refresh();
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+ if (!test_bit(1, &wdt_is_open))
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+ mod_timer(&wdt_timer, jiffies + HZ);
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+}
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+
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+static int wdt_merlot_setup_timer(void)
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+{
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+
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+ init_timer(&wdt_timer);
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+ wdt_timer.function = wdt_merlot_timer_fn;
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+ wdt_timer.data = 0;
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+ wdt_timer.expires = jiffies + HZ;
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+ add_timer(&wdt_timer);
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+ return 0;
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+}
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+
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+static int wdt_open(struct inode *inode, struct file *file)
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+{
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+ if (test_and_set_bit(0, &wdt_is_open))
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+ return -EBUSY;
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+ set_bit(1, &wdt_is_open);
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+ return nonseekable_open(inode, file);
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+}
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+
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+static ssize_t wdt_write(struct file *file, const char __user * buf, size_t count, loff_t * ppos)
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+{
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+ if (count) /* something was written */
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+ wdt_merlot_refresh();
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+ return count;
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+}
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+
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+static int wdt_release(struct inode *inode, struct file *file)
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+{
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+ clear_bit(0, &wdt_is_open);
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+ return 0;
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+}
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+
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+static struct file_operations wdt_fops = {
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+ .owner = THIS_MODULE,
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+ .llseek = no_llseek,
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+ .write = wdt_write,
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+ .open = wdt_open,
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+ .release = wdt_release,
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+};
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+
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+static struct miscdevice wdt_miscdev = {
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+ .minor = WATCHDOG_MINOR,
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+ .name = "watchdog",
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+ .fops = &wdt_fops,
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+};
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+
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+static void __exit wdt_exit(void)
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+{
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+ misc_deregister(&wdt_miscdev);
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+}
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+
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+static int __init wdt_init(void)
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+{
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+ int ret;
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+ ret = misc_register(&wdt_miscdev);
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+ if (ret) {
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+ printk(KERN_ERR
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+ "wdt: cannot register miscdev on minor=%d (err=%d)\n",
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+ WATCHDOG_MINOR, ret);
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+ misc_deregister(&wdt_miscdev);
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+ goto out;
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+ }
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+ printk("wdt: registered with refresh\n");
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+ wdt_merlot_refresh();
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+ wdt_merlot_setup_timer();
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+ out:
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+ return ret;
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+}
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+
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+module_init(wdt_init);
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+module_exit(wdt_exit);
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diff -Nur linux-2.6.15.3/drivers/char/watchdog/Makefile linux-2.6.15.3-openwrt/drivers/char/watchdog/Makefile
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--- linux-2.6.15.3/drivers/char/watchdog/Makefile 2006-02-22 10:04:18.596278000 -0800
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+++ linux-2.6.15.3-openwrt/drivers/char/watchdog/Makefile 2006-02-22 10:06:21.400960000 -0800
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@@ -71,5 +71,8 @@
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# SPARC64 Architecture
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+# Aruba Architecture
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+obj-$(CONFIG_MACH_ARUBA) += wdt_merlot.o
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+
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# Architecture Independant
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obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
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