+Index: linux-2.6.30.8/drivers/watchdog/ifxmips_wdt.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.8/drivers/watchdog/ifxmips_wdt.c 2009-10-19 21:40:17.000000000 +0200
+@@ -0,0 +1,195 @@
++/*
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Copyright (C) 2008 John Crispin <blogic@openwrt.org>
++ * Based on EP93xx wdt driver
++ */
++
++#include <linux/module.h>
++#include <linux/fs.h>
++#include <linux/miscdevice.h>
++#include <linux/miscdevice.h>
++#include <linux/watchdog.h>
++#include <linux/platform_device.h>
++#include <linux/uaccess.h>
++
++#include <ifxmips.h>
++#include <ifxmips_cgu.h>
++
++#define IFXMIPS_WDT_PW1 0x00BE0000
++#define IFXMIPS_WDT_PW2 0x00DC0000
++
++#ifndef CONFIG_WATCHDOG_NOWAYOUT
++static int wdt_ok_to_close;
++#endif
++
++static int wdt_timeout = 30;
++
++int ifxmips_wdt_enable(unsigned int timeout)
++{
++ u32 fpi;
++ fpi = cgu_get_io_region_clock();
++ ifxmips_w32(IFXMIPS_WDT_PW1, IFXMIPS_BIU_WDT_CR);
++ ifxmips_w32(IFXMIPS_WDT_PW2 |
++ (0x3 << 26) | /* PWL */
++ (0x3 << 24) | /* CLKDIV */
++ (0x1 << 31) | /* enable */
++ ((timeout * (fpi / 0x40000)) + 0x1000), /* reload */
++ IFXMIPS_BIU_WDT_CR);
++ return 0;
++}
++
++void ifxmips_wdt_disable(void)
++{
++#ifndef CONFIG_WATCHDOG_NOWAYOUT
++ wdt_ok_to_close = 0;
++#endif
++ ifxmips_w32(IFXMIPS_WDT_PW1, IFXMIPS_BIU_WDT_CR);
++ ifxmips_w32(IFXMIPS_WDT_PW2, IFXMIPS_BIU_WDT_CR);
++}
++
++static ssize_t ifxmips_wdt_write(struct file *file, const char __user *data,
++ size_t len, loff_t *ppos)
++{
++ size_t i;
++
++ if (!len)
++ return 0;
++
++#ifndef CONFIG_WATCHDOG_NOWAYOUT
++ for (i = 0; i != len; i++) {
++ char c;
++ if (get_user(c, data + i))
++ return -EFAULT;
++ if (c == 'V')
++ wdt_ok_to_close = 1;
++ }
++#endif
++ ifxmips_wdt_enable(wdt_timeout);
++ return len;
++}
++
++static struct watchdog_info ident = {
++ .options = WDIOF_MAGICCLOSE,
++ .identity = "ifxmips Watchdog",
++};
++
++static int ifxmips_wdt_ioctl(struct inode *inode, struct file *file,
++ unsigned int cmd, unsigned long arg)
++{
++ int ret = -ENOTTY;
++
++ switch (cmd) {
++ case WDIOC_GETSUPPORT:
++ ret = copy_to_user((struct watchdog_info __user *)arg, &ident,
++ sizeof(ident)) ? -EFAULT : 0;
++ break;
++
++ case WDIOC_GETTIMEOUT:
++ ret = put_user(wdt_timeout, (int __user *)arg);
++ break;
++
++ case WDIOC_SETTIMEOUT:
++ ret = get_user(wdt_timeout, (int __user *)arg);
++ break;
++
++ case WDIOC_KEEPALIVE:
++ ifxmips_wdt_enable(wdt_timeout);
++ ret = 0;
++ break;
++ }
++ return ret;
++}
++
++static int ifxmips_wdt_open(struct inode *inode, struct file *file)
++{
++ ifxmips_wdt_enable(wdt_timeout);
++ return nonseekable_open(inode, file);
++}
++
++static int ifxmips_wdt_release(struct inode *inode, struct file *file)
++{
++#ifndef CONFIG_WATCHDOG_NOWAYOUT
++ if (wdt_ok_to_close)
++ ifxmips_wdt_disable();
++ else
++#endif
++ printk(KERN_ERR "ifxmips_wdt: watchdog closed without warning,"
++ " rebooting system\n");
++ return 0;
++}
++
++static const struct file_operations ifxmips_wdt_fops = {
++ .owner = THIS_MODULE,
++ .write = ifxmips_wdt_write,
++ .ioctl = ifxmips_wdt_ioctl,
++ .open = ifxmips_wdt_open,
++ .release = ifxmips_wdt_release,
++};
++
++static struct miscdevice ifxmips_wdt_miscdev = {
++ .minor = WATCHDOG_MINOR,
++ .name = "watchdog",
++ .fops = &ifxmips_wdt_fops,
++};
++
++static int ifxmips_wdt_probe(struct platform_device *dev)
++{
++ int err;
++ err = misc_register(&ifxmips_wdt_miscdev);
++ if (err)
++ printk(KERN_INFO "ifxmips_wdt: error creating device\n");
++ else
++ printk(KERN_INFO "ifxmips_wdt: loaded\n");
++ return err;
++}
++
++static int ifxmips_wdt_remove(struct platform_device *dev)
++{
++ ifxmips_wdt_disable();
++ misc_deregister(&ifxmips_wdt_miscdev);
++ return 0;
++}
++
++
++static struct platform_driver ifxmips_wdt_driver = {
++ .probe = ifxmips_wdt_probe,
++ .remove = ifxmips_wdt_remove,
++ .driver = {
++ .name = "ifxmips_wdt",
++ .owner = THIS_MODULE,
++ },
++};
++
++static int __init init_ifxmips_wdt(void)
++{
++ int ret = platform_driver_register(&ifxmips_wdt_driver);
++ if (ret)
++ printk(KERN_INFO "ifxmips_wdt: error registering platfom driver!");
++ return ret;
++}
++
++static void __exit exit_ifxmips_wdt(void)
++{
++ platform_driver_unregister(&ifxmips_wdt_driver);
++}
++
++module_init(init_ifxmips_wdt);
++module_exit(exit_ifxmips_wdt);
++
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
++MODULE_DESCRIPTION("ifxmips Watchdog");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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