/*
* Watchdog driver for the SA11x0/PXA2xx
*
- * (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
- * Based on SoftDog driver by Alan Cox <alan@redhat.com>
+ * (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
+ * Based on SoftDog driver by Alan Cox <alan@lxorguk.ukuu.org.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
*
* (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
*
- * 27/11/2000 Initial release
+ * 27/11/2000 Initial release
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/watchdog.h>
#include <linux/init.h>
#include <linux/bitops.h>
+#include <linux/uaccess.h>
+#include <linux/timex.h>
#ifdef CONFIG_ARCH_PXA
-#include <asm/arch/pxa-regs.h>
+#include <mach/regs-ost.h>
#endif
-#include <asm/hardware.h>
-#include <asm/uaccess.h>
-
-#define OSCR_FREQ CLOCK_TICK_RATE
+#include <mach/reset.h>
+#include <mach/hardware.h>
+static unsigned long oscr_freq;
static unsigned long sa1100wdt_users;
-static int pre_margin;
+static unsigned int pre_margin;
static int boot_status;
/*
*/
static int sa1100dog_open(struct inode *inode, struct file *file)
{
- if (test_and_set_bit(1,&sa1100wdt_users))
+ if (test_and_set_bit(1, &sa1100wdt_users))
return -EBUSY;
/* Activate SA1100 Watchdog timer */
static int sa1100dog_release(struct inode *inode, struct file *file)
{
printk(KERN_CRIT "WATCHDOG: Device closed - timer will not stop\n");
-
clear_bit(1, &sa1100wdt_users);
-
return 0;
}
-static ssize_t sa1100dog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+static ssize_t sa1100dog_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
{
if (len)
/* Refresh OSMR3 timer. */
OSMR3 = OSCR + pre_margin;
-
return len;
}
-static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+static const struct watchdog_info ident = {
+ .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT
+ | WDIOF_KEEPALIVEPING,
.identity = "SA1100/PXA255 Watchdog",
+ .firmware_version = 1,
};
-static int sa1100dog_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long sa1100dog_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int ret = -ENOTTY;
int time;
ret = put_user(boot_status, p);
break;
+ case WDIOC_KEEPALIVE:
+ OSMR3 = OSCR + pre_margin;
+ ret = 0;
+ break;
+
case WDIOC_SETTIMEOUT:
ret = get_user(time, p);
if (ret)
break;
- if (time <= 0 || time > 255) {
+ if (time <= 0 || (oscr_freq * (long long)time >= 0xffffffff)) {
ret = -EINVAL;
break;
}
- pre_margin = OSCR_FREQ * time;
+ pre_margin = oscr_freq * time;
OSMR3 = OSCR + pre_margin;
/*fall through*/
case WDIOC_GETTIMEOUT:
- ret = put_user(pre_margin / OSCR_FREQ, p);
- break;
-
- case WDIOC_KEEPALIVE:
- OSMR3 = OSCR + pre_margin;
- ret = 0;
+ ret = put_user(pre_margin / oscr_freq, p);
break;
}
return ret;
}
-static const struct file_operations sa1100dog_fops =
-{
+static const struct file_operations sa1100dog_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = sa1100dog_write,
- .ioctl = sa1100dog_ioctl,
+ .unlocked_ioctl = sa1100dog_ioctl,
.open = sa1100dog_open,
.release = sa1100dog_release,
};
-static struct miscdevice sa1100dog_miscdev =
-{
+static struct miscdevice sa1100dog_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &sa1100dog_fops,
{
int ret;
+ oscr_freq = get_clock_tick_rate();
+
/*
* Read the reset status, and save it for later. If
* we suspend, RCSR will be cleared, and the watchdog
* reset reason will be lost.
*/
- boot_status = (RCSR & RCSR_WDR) ? WDIOF_CARDRESET : 0;
- pre_margin = OSCR_FREQ * margin;
+ boot_status = (reset_status & RESET_STATUS_WATCHDOG) ?
+ WDIOF_CARDRESET : 0;
+ pre_margin = oscr_freq * margin;
ret = misc_register(&sa1100dog_miscdev);
if (ret == 0)
- printk("SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n",
- margin);
+ printk(KERN_INFO
+ "SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n",
+ margin);
return ret;
}