/*
* ICP Wafer 5823 Single Board Computer WDT driver
- * http://www.icpamerica.com/wafer_5823.php
- * May also work on other similar models
+ * http://www.icpamerica.com/wafer_5823.php
+ * May also work on other similar models
*
* (c) Copyright 2002 Justin Cormack <justin@street-vision.com>
*
- * Release 0.02
+ * Release 0.02
*
* Based on advantechwdt.c which is based on wdt.c.
* Original copyright messages:
*
- * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
+ * (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>,
+ * All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/spinlock.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#define WATCHDOG_NAME "Wafer 5823 WDT"
#define PFX WATCHDOG_NAME ": "
/*
* You must set these - there is no sane way to probe for this board.
*
- * To enable, write the timeout value in seconds (1 to 255) to I/O
- * port WDT_START, then read the port to start the watchdog. To pat
- * the dog, read port WDT_STOP to stop the timer, then read WDT_START
- * to restart it again.
+ * To enable, write the timeout value in seconds (1 to 255) to I/O
+ * port WDT_START, then read the port to start the watchdog. To pat
+ * the dog, read port WDT_STOP to stop the timer, then read WDT_START
+ * to restart it again.
*/
static int wdt_stop = 0x843;
static int timeout = WD_TIMO; /* in seconds */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WD_TIMO) ".");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. 1 <= timeout <= 255, default="
+ __MODULE_STRING(WD_TIMO) ".");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static void wafwdt_ping(void)
{
inb_p(wdt_start);
}
-static void
-wafwdt_stop(void)
+static void wafwdt_stop(void)
{
/* stop watchdog */
inb_p(wdt_stop);
}
-static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
+static ssize_t wafwdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
if (count) {
/* In case it was set long ago */
expect_close = 0;
- /* scan to see whether or not we got the magic character */
+ /* scan to see whether or not we got the magic
+ character */
for (i = 0; i != count; i++) {
char c;
if (get_user(c, buf + i))
expect_close = 42;
}
}
- /* Well, anyhow someone wrote to us, we should return that favour */
+ /* Well, anyhow someone wrote to us, we should
+ return that favour */
wafwdt_ping();
}
return count;
}
-static int wafwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long wafwdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int new_timeout;
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ static const struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "Wafer 5823 WDT",
};
switch (cmd) {
case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof (ident)))
+ if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
break;
case WDIOC_GETBOOTSTATUS:
return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wafwdt_ping();
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if ((new_timeout < 1) || (new_timeout > 255))
- return -EINVAL;
- timeout = new_timeout;
- wafwdt_stop();
- wafwdt_start();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
case WDIOC_SETOPTIONS:
{
int options, retval = -EINVAL;
return retval;
}
+ case WDIOC_KEEPALIVE:
+ wafwdt_ping();
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if ((new_timeout < 1) || (new_timeout > 255))
+ return -EINVAL;
+ timeout = new_timeout;
+ wafwdt_stop();
+ wafwdt_start();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+
default:
return -ENOTTY;
}
return nonseekable_open(inode, file);
}
-static int
-wafwdt_close(struct inode *inode, struct file *file)
+static int wafwdt_close(struct inode *inode, struct file *file)
{
- if (expect_close == 42) {
+ if (expect_close == 42)
wafwdt_stop();
- } else {
- printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
+ else {
+ printk(KERN_CRIT PFX
+ "WDT device closed unexpectedly. WDT will not stop!\n");
wafwdt_ping();
}
clear_bit(0, &wafwdt_is_open);
* Notifier for system down
*/
-static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Turn the WDT off */
+ if (code == SYS_DOWN || code == SYS_HALT)
wafwdt_stop();
- }
return NOTIFY_DONE;
}
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wafwdt_write,
- .ioctl = wafwdt_ioctl,
+ .unlocked_ioctl = wafwdt_ioctl,
.open = wafwdt_open,
.release = wafwdt_close,
};
{
int ret;
- printk(KERN_INFO "WDT driver for Wafer 5823 single board computer initialising.\n");
+ printk(KERN_INFO
+ "WDT driver for Wafer 5823 single board computer initialising.\n");
if (timeout < 1 || timeout > 255) {
timeout = WD_TIMO;
- printk (KERN_INFO PFX "timeout value must be 1<=x<=255, using %d\n",
- timeout);
+ printk(KERN_INFO PFX
+ "timeout value must be 1 <= x <= 255, using %d\n",
+ timeout);
}
if (wdt_stop != wdt_start) {
- if(!request_region(wdt_stop, 1, "Wafer 5823 WDT")) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
+ if (!request_region(wdt_stop, 1, "Wafer 5823 WDT")) {
+ printk(KERN_ERR PFX
+ "I/O address 0x%04x already in use\n",
+ wdt_stop);
ret = -EIO;
goto error;
}
}
- if(!request_region(wdt_start, 1, "Wafer 5823 WDT")) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ if (!request_region(wdt_start, 1, "Wafer 5823 WDT")) {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
wdt_start);
ret = -EIO;
goto error2;
ret = register_reboot_notifier(&wafwdt_notifier);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
goto error3;
}
ret = misc_register(&wafwdt_miscdev);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto error4;
}
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
return ret;
{
misc_deregister(&wafwdt_miscdev);
unregister_reboot_notifier(&wafwdt_notifier);
- if(wdt_stop != wdt_start)
+ if (wdt_stop != wdt_start)
release_region(wdt_stop, 1);
release_region(wdt_start, 1);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff