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Subject[PATCH] WDIOC_SETTIMEOUT for 2.5.2
Folks,
Here's the WDIOC_SETTIMEOUT patch against 2.5.2.

Joel


diff -uNr linux-2.5.2/drivers/char/advantechwdt.c linux-2.5.2-wd/drivers/char/advantechwdt.c
--- linux-2.5.2/drivers/char/advantechwdt.c Thu Jan 3 12:20:10 2002
+++ linux-2.5.2-wd/drivers/char/advantechwdt.c Mon Jan 21 16:51:19 2002
@@ -64,6 +64,7 @@
#define WDT_START 0x443

#define WD_TIMO 60 /* 1 minute */
+static int wd_margin = WD_TIMO;

/*
* Kernel methods.
@@ -73,7 +74,7 @@
advwdt_ping(void)
{
/* Write a watchdog value */
- outb_p(WD_TIMO, WDT_START);
+ outb_p(wd_margin, WDT_START);
}

static ssize_t
@@ -100,8 +101,9 @@
advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
+ int new_margin;
static struct watchdog_info ident = {
- WDIOF_KEEPALIVEPING, 1, "Advantech WDT"
+ WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT, 1, "Advantech WDT"
};

switch (cmd) {
@@ -117,6 +119,19 @@

case WDIOC_KEEPALIVE:
advwdt_ping();
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int *)arg))
+ return -EFAULT;
+ if ((new_margin < 1) || (new_margin > 63))
+ return -EINVAL;
+ wd_margin = new_margin;
+ advwdt_ping();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(wd_margin, (int *)arg);
break;

default:
diff -uNr linux-2.5.2/drivers/char/eurotechwdt.c linux-2.5.2-wd/drivers/char/eurotechwdt.c
--- linux-2.5.2/drivers/char/eurotechwdt.c Thu Jan 3 12:20:10 2002
+++ linux-2.5.2-wd/drivers/char/eurotechwdt.c Mon Jan 21 16:51:19 2002
@@ -233,7 +233,7 @@
unsigned int cmd, unsigned long arg)
{
static struct watchdog_info ident = {
- options : WDIOF_CARDRESET,
+ options : WDIOF_CARDRESET | WDIOF_SETTIMEOUT,
firmware_version : 1,
identity : "WDT Eurotech CPU-1220/1410"
};
@@ -265,7 +265,10 @@

eurwdt_timeout = time;
eurwdt_set_timeout(time);
- return 0;
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(eurwdt_timeout, (int *)arg);
}
}

diff -uNr linux-2.5.2/drivers/char/i810-tco.c linux-2.5.2-wd/drivers/char/i810-tco.c
--- linux-2.5.2/drivers/char/i810-tco.c Thu Sep 13 15:21:32 2001
+++ linux-2.5.2-wd/drivers/char/i810-tco.c Mon Jan 21 16:51:19 2002
@@ -181,7 +181,7 @@
/*
* Shut off the timer.
*/
-#ifdef CONFIG_WATCHDOG_NOWAYOUT
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
tco_timer_stop ();
timer_alive = 0;
#endif
@@ -208,8 +208,10 @@
static int i810tco_ioctl (struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
+ int new_margin, u_margin;
+
static struct watchdog_info ident = {
- 0,
+ WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
0,
"i810 TCO timer"
};
@@ -229,6 +231,19 @@
case WDIOC_KEEPALIVE:
tco_timer_reload ();
return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(u_margin, (int *) arg))
+ return -EFAULT;
+ new_margin = (u_margin * 10 + 5) / 6;
+ if ((new_margin < 3) || (new_margin > 63))
+ return -EINVAL;
+ if (tco_timer_settimer((unsigned char)new_margin))
+ return -EINVAL;
+ i810_margin = new_margin;
+ tco_timer_reload();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user((int)(i810_margin * 6 / 10), (int *) arg);
}
}

diff -uNr linux-2.5.2/drivers/char/ib700wdt.c linux-2.5.2-wd/drivers/char/ib700wdt.c
--- linux-2.5.2/drivers/char/ib700wdt.c Thu Jan 3 12:20:10 2002
+++ linux-2.5.2-wd/drivers/char/ib700wdt.c Mon Jan 21 16:51:19 2002
@@ -87,11 +87,34 @@
*
*/

+static int wd_times[] = {
+ 30, /* 0x0 */
+ 28, /* 0x1 */
+ 26, /* 0x2 */
+ 24, /* 0x3 */
+ 22, /* 0x4 */
+ 20, /* 0x5 */
+ 18, /* 0x6 */
+ 16, /* 0x7 */
+ 14, /* 0x8 */
+ 12, /* 0x9 */
+ 10, /* 0xA */
+ 8, /* 0xB */
+ 6, /* 0xC */
+ 4, /* 0xD */
+ 2, /* 0xE */
+ 0, /* 0xF */
+};
+
#define WDT_STOP 0x441
#define WDT_START 0x443

+/* Default timeout */
#define WD_TIMO 0 /* 30 seconds +/- 20%, from table */

+static int wd_margin = WD_TIMO;
+
+
/*
* Kernel methods.
*/
@@ -100,7 +123,7 @@
ibwdt_ping(void)
{
/* Write a watchdog value */
- outb_p(WD_TIMO, WDT_START);
+ outb_p(wd_times[wd_margin], WDT_START);
}

static ssize_t
@@ -127,8 +150,10 @@
ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
+ int i, new_margin;
+
static struct watchdog_info ident = {
- WDIOF_KEEPALIVEPING, 1, "IB700 WDT"
+ WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT, 1, "IB700 WDT"
};

switch (cmd) {
@@ -146,6 +171,22 @@
ibwdt_ping();
break;

+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int *)arg))
+ return -EFAULT;
+ if ((new_margin < 0) || (new_margin > 30))
+ return -EINVAL;
+ for (i = 0x0F; i > -1; i--)
+ if (wd_times[i] > new_margin)
+ break;
+ wd_margin = i;
+ ibwdt_ping();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(wd_times[wd_margin], (int *)arg);
+ break;
+
default:
return -ENOTTY;
}
@@ -182,7 +223,7 @@
if (minor(inode->i_rdev) == WATCHDOG_MINOR) {
spin_lock(&ibwdt_lock);
#ifndef CONFIG_WATCHDOG_NOWAYOUT
- outb_p(WD_TIMO, WDT_STOP);
+ outb_p(wd_times[wd_margin], WDT_STOP);
#endif
ibwdt_is_open = 0;
spin_unlock(&ibwdt_lock);
@@ -201,7 +242,7 @@
{
if (code == SYS_DOWN || code == SYS_HALT) {
/* Turn the WDT off */
- outb_p(WD_TIMO, WDT_STOP);
+ outb_p(wd_times[wd_margin], WDT_STOP);
}
return NOTIFY_DONE;
}
diff -uNr linux-2.5.2/drivers/char/ib700wdt.c~ linux-2.5.2-wd/drivers/char/ib700wdt.c~
--- linux-2.5.2/drivers/char/ib700wdt.c~ Wed Dec 31 16:00:00 1969
+++ linux-2.5.2-wd/drivers/char/ib700wdt.c~ Thu Jan 3 12:20:10 2002
@@ -0,0 +1,272 @@
+/*
+ * IB700 Single Board Computer WDT driver for Linux 2.4.x
+ *
+ * (c) Copyright 2001 Charles Howes <chowes@vsol.net>
+ *
+ * Based on advantechwdt.c which is based on acquirewdt.c which
+ * is based on wdt.c.
+ *
+ * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
+ *
+ * Based on acquirewdt.c which is based on wdt.c.
+ * Original copyright messages:
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * 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.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@redhat.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/fcntl.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+
+static int ibwdt_is_open;
+static spinlock_t ibwdt_lock;
+
+/*
+ *
+ * Watchdog Timer Configuration
+ *
+ * The function of the watchdog timer is to reset the system
+ * automatically and is defined at I/O port 0443H. To enable the
+ * watchdog timer and allow the system to reset, write I/O port 0443H.
+ * To disable the timer, write I/O port 0441H for the system to stop the
+ * watchdog function. The timer has a tolerance of 20% for its
+ * intervals.
+ *
+ * The following describes how the timer should be programmed.
+ *
+ * Enabling Watchdog:
+ * MOV AX,000FH (Choose the values from 0 to F)
+ * MOV DX,0443H
+ * OUT DX,AX
+ *
+ * Disabling Watchdog:
+ * MOV AX,000FH (Any value is fine.)
+ * MOV DX,0441H
+ * OUT DX,AX
+ *
+ * Watchdog timer control table:
+ * Level Value Time/sec | Level Value Time/sec
+ * 1 F 0 | 9 7 16
+ * 2 E 2 | 10 6 18
+ * 3 D 4 | 11 5 20
+ * 4 C 6 | 12 4 22
+ * 5 B 8 | 13 3 24
+ * 6 A 10 | 14 2 26
+ * 7 9 12 | 15 1 28
+ * 8 8 14 | 16 0 30
+ *
+ */
+
+#define WDT_STOP 0x441
+#define WDT_START 0x443
+
+#define WD_TIMO 0 /* 30 seconds +/- 20%, from table */
+
+/*
+ * Kernel methods.
+ */
+
+static void
+ibwdt_ping(void)
+{
+ /* Write a watchdog value */
+ outb_p(WD_TIMO, WDT_START);
+}
+
+static ssize_t
+ibwdt_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
+{
+ /* Can't seek (pwrite) on this device */
+ if (ppos != &file->f_pos)
+ return -ESPIPE;
+
+ if (count) {
+ ibwdt_ping();
+ return 1;
+ }
+ return 0;
+}
+
+static ssize_t
+ibwdt_read(struct file *file, char *buf, size_t count, loff_t *ppos)
+{
+ return -EINVAL;
+}
+
+static int
+ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ static struct watchdog_info ident = {
+ WDIOF_KEEPALIVEPING, 1, "IB700 WDT"
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ if (copy_to_user((int *)arg, &ibwdt_is_open, sizeof(int)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_KEEPALIVE:
+ ibwdt_ping();
+ break;
+
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static int
+ibwdt_open(struct inode *inode, struct file *file)
+{
+ switch (minor(inode->i_rdev)) {
+ case WATCHDOG_MINOR:
+ spin_lock(&ibwdt_lock);
+ if (ibwdt_is_open) {
+ spin_unlock(&ibwdt_lock);
+ return -EBUSY;
+ }
+ /*
+ * Activate
+ */
+
+ ibwdt_is_open = 1;
+ ibwdt_ping();
+ spin_unlock(&ibwdt_lock);
+ return 0;
+ default:
+ return -ENODEV;
+ }
+}
+
+static int
+ibwdt_close(struct inode *inode, struct file *file)
+{
+ lock_kernel();
+ if (minor(inode->i_rdev) == WATCHDOG_MINOR) {
+ spin_lock(&ibwdt_lock);
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
+ outb_p(WD_TIMO, WDT_STOP);
+#endif
+ ibwdt_is_open = 0;
+ spin_unlock(&ibwdt_lock);
+ }
+ unlock_kernel();
+ return 0;
+}
+
+/*
+ * Notifier for system down
+ */
+
+static int
+ibwdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT) {
+ /* Turn the WDT off */
+ outb_p(WD_TIMO, WDT_STOP);
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static struct file_operations ibwdt_fops = {
+ owner: THIS_MODULE,
+ read: ibwdt_read,
+ write: ibwdt_write,
+ ioctl: ibwdt_ioctl,
+ open: ibwdt_open,
+ release: ibwdt_close,
+};
+
+static struct miscdevice ibwdt_miscdev = {
+ WATCHDOG_MINOR,
+ "watchdog",
+ &ibwdt_fops
+};
+
+/*
+ * The WDT needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block ibwdt_notifier = {
+ ibwdt_notify_sys,
+ NULL,
+ 0
+};
+
+static int __init
+ibwdt_init(void)
+{
+ printk("WDT driver for IB700 single board computer initialising.\n");
+
+ spin_lock_init(&ibwdt_lock);
+ misc_register(&ibwdt_miscdev);
+#if WDT_START != WDT_STOP
+ request_region(WDT_STOP, 1, "IB700 WDT");
+#endif
+ request_region(WDT_START, 1, "IB700 WDT");
+ register_reboot_notifier(&ibwdt_notifier);
+ return 0;
+}
+
+static void __exit
+ibwdt_exit(void)
+{
+ misc_deregister(&ibwdt_miscdev);
+ unregister_reboot_notifier(&ibwdt_notifier);
+#if WDT_START != WDT_STOP
+ release_region(WDT_STOP,1);
+#endif
+ release_region(WDT_START,1);
+}
+
+module_init(ibwdt_init);
+module_exit(ibwdt_exit);
+
+MODULE_AUTHOR("Charles Howes <chowes@vsol.net>");
+MODULE_DESCRIPTION("IB700 SBC watchdog driver");
+MODULE_LICENSE("GPL");
+
+/* end of ib700wdt.c */
diff -uNr linux-2.5.2/drivers/char/softdog.c linux-2.5.2-wd/drivers/char/softdog.c
--- linux-2.5.2/drivers/char/softdog.c Fri Nov 30 08:26:04 2001
+++ linux-2.5.2-wd/drivers/char/softdog.c Mon Jan 21 16:51:19 2002
@@ -26,6 +26,11 @@
*
* 19980911 Alan Cox
* Made SMP safe for 2.3.x
+ *
+ * 20011127 Joel Becker (jlbec@evilplan.org>
+ * Added soft_noboot; Allows testing the softdog trigger without
+ * requiring a recompile.
+ * Added WDIOC_GETTIMEOUT and WDIOC_SETTIMOUT.
*/

#include <linux/module.h>
@@ -44,8 +49,14 @@
#define TIMER_MARGIN 60 /* (secs) Default is 1 minute */

static int soft_margin = TIMER_MARGIN; /* in seconds */
+#ifdef ONLY_TESTING
+static int soft_noboot = 1;
+#else
+static int soft_noboot = 0;
+#endif /* ONLY_TESTING */

MODULE_PARM(soft_margin,"i");
+MODULE_PARM(soft_noboot,"i");
MODULE_LICENSE("GPL");

/*
@@ -66,13 +77,14 @@

static void watchdog_fire(unsigned long data)
{
-#ifdef ONLY_TESTING
- printk(KERN_CRIT "SOFTDOG: Would Reboot.\n");
-#else
- printk(KERN_CRIT "SOFTDOG: Initiating system reboot.\n");
- machine_restart(NULL);
- printk("WATCHDOG: Reboot didn't ?????\n");
-#endif
+ if (soft_noboot)
+ printk(KERN_CRIT "SOFTDOG: Triggered - Reboot ignored.\n");
+ else
+ {
+ printk(KERN_CRIT "SOFTDOG: Initiating system reboot.\n");
+ machine_restart(NULL);
+ printk("SOFTDOG: Reboot didn't ?????\n");
+ }
}

/*
@@ -126,8 +138,11 @@
static int softdog_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
+ int new_margin;
static struct watchdog_info ident = {
- identity: "Software Watchdog",
+ WDIOF_SETTIMEOUT,
+ 0,
+ "Software Watchdog"
};
switch (cmd) {
default:
@@ -142,6 +157,16 @@
case WDIOC_KEEPALIVE:
mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int *)arg))
+ return -EFAULT;
+ if (new_margin < 1)
+ return -EINVAL;
+ soft_margin = new_margin;
+ mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(soft_margin, (int *)arg);
}
}

diff -uNr linux-2.5.2/drivers/char/softdog.c~ linux-2.5.2-wd/drivers/char/softdog.c~
--- linux-2.5.2/drivers/char/softdog.c~ Wed Dec 31 16:00:00 1969
+++ linux-2.5.2-wd/drivers/char/softdog.c~ Fri Nov 30 08:26:04 2001
@@ -0,0 +1,184 @@
+/*
+ * SoftDog 0.05: A Software Watchdog Device
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * 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.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * Software only watchdog driver. Unlike its big brother the WDT501P
+ * driver this won't always recover a failed machine.
+ *
+ * 03/96: Angelo Haritsis <ah@doc.ic.ac.uk> :
+ * Modularised.
+ * Added soft_margin; use upon insmod to change the timer delay.
+ * NB: uses same minor as wdt (WATCHDOG_MINOR); we could use separate
+ * minors.
+ *
+ * 19980911 Alan Cox
+ * Made SMP safe for 2.3.x
+ */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/reboot.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+
+#define TIMER_MARGIN 60 /* (secs) Default is 1 minute */
+
+static int soft_margin = TIMER_MARGIN; /* in seconds */
+
+MODULE_PARM(soft_margin,"i");
+MODULE_LICENSE("GPL");
+
+/*
+ * Our timer
+ */
+
+static void watchdog_fire(unsigned long);
+
+static struct timer_list watchdog_ticktock = {
+ function: watchdog_fire,
+};
+static int timer_alive;
+
+
+/*
+ * If the timer expires..
+ */
+
+static void watchdog_fire(unsigned long data)
+{
+#ifdef ONLY_TESTING
+ printk(KERN_CRIT "SOFTDOG: Would Reboot.\n");
+#else
+ printk(KERN_CRIT "SOFTDOG: Initiating system reboot.\n");
+ machine_restart(NULL);
+ printk("WATCHDOG: Reboot didn't ?????\n");
+#endif
+}
+
+/*
+ * Allow only one person to hold it open
+ */
+
+static int softdog_open(struct inode *inode, struct file *file)
+{
+ if(timer_alive)
+ return -EBUSY;
+#ifdef CONFIG_WATCHDOG_NOWAYOUT
+ MOD_INC_USE_COUNT;
+#endif
+ /*
+ * Activate timer
+ */
+ mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
+ timer_alive=1;
+ return 0;
+}
+
+static int softdog_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ * Lock it in if it's a module and we defined ...NOWAYOUT
+ */
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
+ del_timer(&watchdog_ticktock);
+#endif
+ timer_alive=0;
+ return 0;
+}
+
+static ssize_t softdog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ /* Can't seek (pwrite) on this device */
+ if (ppos != &file->f_pos)
+ return -ESPIPE;
+
+ /*
+ * Refresh the timer.
+ */
+ if(len) {
+ mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
+ return 1;
+ }
+ return 0;
+}
+
+static int softdog_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ static struct watchdog_info ident = {
+ identity: "Software Watchdog",
+ };
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ if(copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0,(int *)arg);
+ case WDIOC_KEEPALIVE:
+ mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
+ return 0;
+ }
+}
+
+static struct file_operations softdog_fops = {
+ owner: THIS_MODULE,
+ write: softdog_write,
+ ioctl: softdog_ioctl,
+ open: softdog_open,
+ release: softdog_release,
+};
+
+static struct miscdevice softdog_miscdev = {
+ minor: WATCHDOG_MINOR,
+ name: "watchdog",
+ fops: &softdog_fops,
+};
+
+static char banner[] __initdata = KERN_INFO "Software Watchdog Timer: 0.05, timer margin: %d sec\n";
+
+static int __init watchdog_init(void)
+{
+ int ret;
+
+ ret = misc_register(&softdog_miscdev);
+
+ if (ret)
+ return ret;
+
+ printk(banner, soft_margin);
+
+ return 0;
+}
+
+static void __exit watchdog_exit(void)
+{
+ misc_deregister(&softdog_miscdev);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
diff -uNr linux-2.5.2/drivers/char/wdt.c linux-2.5.2-wd/drivers/char/wdt.c
--- linux-2.5.2/drivers/char/wdt.c Thu Jan 3 12:20:10 2002
+++ linux-2.5.2-wd/drivers/char/wdt.c Mon Jan 21 16:51:19 2002
@@ -27,6 +27,7 @@
* Tim Hockin : Added insmod parameters, comment cleanup
* Parameterized timeout
* Tigran Aivazian : Restructured wdt_init() to handle failures
+ * Joel Becker : Added WDIOC_GET/SETTIMEOUT
*/

#include <linux/config.h>
@@ -60,8 +61,11 @@
static int io=0x240;
static int irq=11;

+/* Default margin */
#define WD_TIMO (100*60) /* 1 minute */

+static int wd_margin = WD_TIMO;
+
#ifndef MODULE

/**
@@ -216,7 +220,7 @@
/* Write a watchdog value */
inb_p(WDT_DC);
wdt_ctr_mode(1,2);
- wdt_ctr_load(1,WD_TIMO); /* Timeout */
+ wdt_ctr_load(1,wd_margin); /* Timeout */
outb_p(0, WDT_DC);
}

@@ -294,10 +298,13 @@
static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
+ int new_margin;
+
static struct watchdog_info ident=
{
WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER
- |WDIOF_EXTERN1|WDIOF_EXTERN2|WDIOF_FANFAULT,
+ |WDIOF_EXTERN1|WDIOF_EXTERN2|WDIOF_FANFAULT
+ |WDIOF_SETTIMEOUT,
1,
"WDT500/501"
};
@@ -317,6 +324,17 @@
case WDIOC_KEEPALIVE:
wdt_ping();
return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int *)arg))
+ return -EFAULT;
+ /* Arbitrary, can't find the card's limits */
+ if ((new_margin < 0) || (new_margin > 60))
+ return -EINVAL;
+ wd_margin = new_margin * 100;
+ wdt_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(wd_margin / 100, (int *)arg);
}
}

@@ -348,7 +366,7 @@
wdt_ctr_mode(1,2);
wdt_ctr_mode(2,0);
wdt_ctr_load(0, 8948); /* count at 100Hz */
- wdt_ctr_load(1,WD_TIMO); /* Timeout 120 seconds */
+ wdt_ctr_load(1,wd_margin); /* Timeout 120 seconds */
wdt_ctr_load(2,65535);
outb_p(0, WDT_DC); /* Enable */
return 0;
diff -uNr linux-2.5.2/drivers/char/wdt.c~ linux-2.5.2-wd/drivers/char/wdt.c~
--- linux-2.5.2/drivers/char/wdt.c~ Wed Dec 31 16:00:00 1969
+++ linux-2.5.2-wd/drivers/char/wdt.c~ Thu Jan 3 12:20:10 2002
@@ -0,0 +1,541 @@
+/*
+ * Industrial Computer Source WDT500/501 driver for Linux 2.1.x
+ *
+ * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * 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.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * Release 0.08.
+ *
+ * Fixes
+ * Dave Gregorich : Modularisation and minor bugs
+ * Alan Cox : Added the watchdog ioctl() stuff
+ * Alan Cox : Fixed the reboot problem (as noted by
+ * Matt Crocker).
+ * Alan Cox : Added wdt= boot option
+ * Alan Cox : Cleaned up copy/user stuff
+ * Tim Hockin : Added insmod parameters, comment cleanup
+ * Parameterized timeout
+ * Tigran Aivazian : Restructured wdt_init() to handle failures
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include "wd501p.h"
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/fcntl.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+
+static unsigned long wdt_is_open;
+
+/*
+ * You must set these - there is no sane way to probe for this board.
+ * You can use wdt=x,y to set these now.
+ */
+
+static int io=0x240;
+static int irq=11;
+
+#define WD_TIMO (100*60) /* 1 minute */
+
+#ifndef MODULE
+
+/**
+ * wdt_setup:
+ * @str: command line string
+ *
+ * Setup options. The board isn't really probe-able so we have to
+ * get the user to tell us the configuration. Sane people build it
+ * modular but the others come here.
+ */
+
+static int __init wdt_setup(char *str)
+{
+ int ints[4];
+
+ str = get_options (str, ARRAY_SIZE(ints), ints);
+
+ if (ints[0] > 0)
+ {
+ io = ints[1];
+ if(ints[0] > 1)
+ irq = ints[2];
+ }
+
+ return 1;
+}
+
+__setup("wdt=", wdt_setup);
+
+#endif /* !MODULE */
+
+MODULE_PARM(io, "i");
+MODULE_PARM_DESC(io, "WDT io port (default=0x240)");
+MODULE_PARM(irq, "i");
+MODULE_PARM_DESC(irq, "WDT irq (default=11)");
+
+/*
+ * Programming support
+ */
+
+static void wdt_ctr_mode(int ctr, int mode)
+{
+ ctr<<=6;
+ ctr|=0x30;
+ ctr|=(mode<<1);
+ outb_p(ctr, WDT_CR);
+}
+
+static void wdt_ctr_load(int ctr, int val)
+{
+ outb_p(val&0xFF, WDT_COUNT0+ctr);
+ outb_p(val>>8, WDT_COUNT0+ctr);
+}
+
+/*
+ * Kernel methods.
+ */
+
+
+/**
+ * wdt_status:
+ *
+ * Extract the status information from a WDT watchdog device. There are
+ * several board variants so we have to know which bits are valid. Some
+ * bits default to one and some to zero in order to be maximally painful.
+ *
+ * we then map the bits onto the status ioctl flags.
+ */
+
+static int wdt_status(void)
+{
+ /*
+ * Status register to bit flags
+ */
+
+ int flag=0;
+ unsigned char status=inb_p(WDT_SR);
+ status|=FEATUREMAP1;
+ status&=~FEATUREMAP2;
+
+ if(!(status&WDC_SR_TGOOD))
+ flag|=WDIOF_OVERHEAT;
+ if(!(status&WDC_SR_PSUOVER))
+ flag|=WDIOF_POWEROVER;
+ if(!(status&WDC_SR_PSUUNDR))
+ flag|=WDIOF_POWERUNDER;
+ if(!(status&WDC_SR_FANGOOD))
+ flag|=WDIOF_FANFAULT;
+ if(status&WDC_SR_ISOI0)
+ flag|=WDIOF_EXTERN1;
+ if(status&WDC_SR_ISII1)
+ flag|=WDIOF_EXTERN2;
+ return flag;
+}
+
+/**
+ * wdt_interrupt:
+ * @irq: Interrupt number
+ * @dev_id: Unused as we don't allow multiple devices.
+ * @regs: Unused.
+ *
+ * Handle an interrupt from the board. These are raised when the status
+ * map changes in what the board considers an interesting way. That means
+ * a failure condition occuring.
+ */
+
+void wdt_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ /*
+ * Read the status register see what is up and
+ * then printk it.
+ */
+
+ unsigned char status=inb_p(WDT_SR);
+
+ status|=FEATUREMAP1;
+ status&=~FEATUREMAP2;
+
+ printk(KERN_CRIT "WDT status %d\n", status);
+
+ if(!(status&WDC_SR_TGOOD))
+ printk(KERN_CRIT "Overheat alarm.(%d)\n",inb_p(WDT_RT));
+ if(!(status&WDC_SR_PSUOVER))
+ printk(KERN_CRIT "PSU over voltage.\n");
+ if(!(status&WDC_SR_PSUUNDR))
+ printk(KERN_CRIT "PSU under voltage.\n");
+ if(!(status&WDC_SR_FANGOOD))
+ printk(KERN_CRIT "Possible fan fault.\n");
+ if(!(status&WDC_SR_WCCR))
+#ifdef SOFTWARE_REBOOT
+#ifdef ONLY_TESTING
+ printk(KERN_CRIT "Would Reboot.\n");
+#else
+ printk(KERN_CRIT "Initiating system reboot.\n");
+ machine_restart(NULL);
+#endif
+#else
+ printk(KERN_CRIT "Reset in 5ms.\n");
+#endif
+}
+
+
+/**
+ * wdt_ping:
+ *
+ * Reload counter one with the watchdog timeout. We don't bother reloading
+ * the cascade counter.
+ */
+
+static void wdt_ping(void)
+{
+ /* Write a watchdog value */
+ inb_p(WDT_DC);
+ wdt_ctr_mode(1,2);
+ wdt_ctr_load(1,WD_TIMO); /* Timeout */
+ outb_p(0, WDT_DC);
+}
+
+/**
+ * wdt_write:
+ * @file: file handle to the watchdog
+ * @buf: buffer to write (unused as data does not matter here
+ * @count: count of bytes
+ * @ppos: pointer to the position to write. No seeks allowed
+ *
+ * A write to a watchdog device is defined as a keepalive signal. Any
+ * write of data will do, as we we don't define content meaning.
+ */
+
+static ssize_t wdt_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
+{
+ /* Can't seek (pwrite) on this device */
+ if (ppos != &file->f_pos)
+ return -ESPIPE;
+
+ if(count)
+ {
+ wdt_ping();
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * wdt_read:
+ * @file: file handle to the watchdog board
+ * @buf: buffer to write 1 byte into
+ * @count: length of buffer
+ * @ptr: offset (no seek allowed)
+ *
+ * Read reports the temperature in degrees Fahrenheit. The API is in
+ * farenheit. It was designed by an imperial measurement luddite.
+ */
+
+static ssize_t wdt_read(struct file *file, char *buf, size_t count, loff_t *ptr)
+{
+ unsigned short c=inb_p(WDT_RT);
+ unsigned char cp;
+
+ /* Can't seek (pread) on this device */
+ if (ptr != &file->f_pos)
+ return -ESPIPE;
+
+ switch(minor(file->f_dentry->d_inode->i_rdev))
+ {
+ case TEMP_MINOR:
+ c*=11;
+ c/=15;
+ cp=c+7;
+ if(copy_to_user(buf,&cp,1))
+ return -EFAULT;
+ return 1;
+ default:
+ return -EINVAL;
+ }
+}
+
+/**
+ * wdt_ioctl:
+ * @inode: inode of the device
+ * @file: file handle to the device
+ * @cmd: watchdog command
+ * @arg: argument pointer
+ *
+ * The watchdog API defines a common set of functions for all watchdogs
+ * according to their available features. We only actually usefully support
+ * querying capabilities and current status.
+ */
+
+static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ static struct watchdog_info ident=
+ {
+ WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER
+ |WDIOF_EXTERN1|WDIOF_EXTERN2|WDIOF_FANFAULT,
+ 1,
+ "WDT500/501"
+ };
+
+ ident.options&=WDT_OPTION_MASK; /* Mask down to the card we have */
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident))?-EFAULT:0;
+
+ case WDIOC_GETSTATUS:
+ return put_user(wdt_status(),(int *)arg);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, (int *)arg);
+ case WDIOC_KEEPALIVE:
+ wdt_ping();
+ return 0;
+ }
+}
+
+/**
+ * wdt_open:
+ * @inode: inode of device
+ * @file: file handle to device
+ *
+ * One of our two misc devices has been opened. The watchdog device is
+ * single open and on opening we load the counters. Counter zero is a
+ * 100Hz cascade, into counter 1 which downcounts to reboot. When the
+ * counter triggers counter 2 downcounts the length of the reset pulse
+ * which set set to be as long as possible.
+ */
+
+static int wdt_open(struct inode *inode, struct file *file)
+{
+ switch(minor(inode->i_rdev))
+ {
+ case WATCHDOG_MINOR:
+ if(test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+ /*
+ * Activate
+ */
+
+ inb_p(WDT_DC); /* Disable */
+ wdt_ctr_mode(0,3);
+ wdt_ctr_mode(1,2);
+ wdt_ctr_mode(2,0);
+ wdt_ctr_load(0, 8948); /* count at 100Hz */
+ wdt_ctr_load(1,WD_TIMO); /* Timeout 120 seconds */
+ wdt_ctr_load(2,65535);
+ outb_p(0, WDT_DC); /* Enable */
+ return 0;
+ case TEMP_MINOR:
+ return 0;
+ default:
+ return -ENODEV;
+ }
+}
+
+/**
+ * wdt_close:
+ * @inode: inode to board
+ * @file: file handle to board
+ *
+ * The watchdog has a configurable API. There is a religious dispute
+ * between people who want their watchdog to be able to shut down and
+ * those who want to be sure if the watchdog manager dies the machine
+ * reboots. In the former case we disable the counters, in the latter
+ * case you have to open it again very soon.
+ */
+
+static int wdt_release(struct inode *inode, struct file *file)
+{
+ if(minor(inode->i_rdev)==WATCHDOG_MINOR)
+ {
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
+ inb_p(WDT_DC); /* Disable counters */
+ wdt_ctr_load(2,0); /* 0 length reset pulses now */
+#endif
+ clear_bit(0, &wdt_is_open);
+ }
+ return 0;
+}
+
+/**
+ * notify_sys:
+ * @this: our notifier block
+ * @code: the event being reported
+ * @unused: unused
+ *
+ * Our notifier is called on system shutdowns. We want to turn the card
+ * off at reboot otherwise the machine will reboot again during memory
+ * test or worse yet during the following fsck. This would suck, in fact
+ * trust me - if it happens it does suck.
+ */
+
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if(code==SYS_DOWN || code==SYS_HALT)
+ {
+ /* Turn the card off */
+ inb_p(WDT_DC);
+ wdt_ctr_load(2,0);
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+
+static struct file_operations wdt_fops = {
+ owner: THIS_MODULE,
+ llseek: no_llseek,
+ read: wdt_read,
+ write: wdt_write,
+ ioctl: wdt_ioctl,
+ open: wdt_open,
+ release: wdt_release,
+};
+
+static struct miscdevice wdt_miscdev=
+{
+ WATCHDOG_MINOR,
+ "watchdog",
+ &wdt_fops
+};
+
+#ifdef CONFIG_WDT_501
+static struct miscdevice temp_miscdev=
+{
+ TEMP_MINOR,
+ "temperature",
+ &wdt_fops
+};
+#endif
+
+/*
+ * The WDT card needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdt_notifier=
+{
+ wdt_notify_sys,
+ NULL,
+ 0
+};
+
+/**
+ * cleanup_module:
+ *
+ * Unload the watchdog. You cannot do this with any file handles open.
+ * If your watchdog is set to continue ticking on close and you unload
+ * it, well it keeps ticking. We won't get the interrupt but the board
+ * will not touch PC memory so all is fine. You just have to load a new
+ * module in 60 seconds or reboot.
+ */
+
+static void __exit wdt_exit(void)
+{
+ misc_deregister(&wdt_miscdev);
+#ifdef CONFIG_WDT_501
+ misc_deregister(&temp_miscdev);
+#endif
+ unregister_reboot_notifier(&wdt_notifier);
+ release_region(io,8);
+ free_irq(irq, NULL);
+}
+
+/**
+ * wdt_init:
+ *
+ * Set up the WDT watchdog board. All we have to do is grab the
+ * resources we require and bitch if anyone beat us to them.
+ * The open() function will actually kick the board off.
+ */
+
+static int __init wdt_init(void)
+{
+ int ret;
+
+ ret = misc_register(&wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR "wdt: can't misc_register on minor=%d\n", WATCHDOG_MINOR);
+ goto out;
+ }
+ ret = request_irq(irq, wdt_interrupt, SA_INTERRUPT, "wdt501p", NULL);
+ if(ret) {
+ printk(KERN_ERR "wdt: IRQ %d is not free.\n", irq);
+ goto outmisc;
+ }
+ if (!request_region(io, 8, "wdt501p")) {
+ printk(KERN_ERR "wdt: IO %X is not free.\n", io);
+ ret = -EBUSY;
+ goto outirq;
+ }
+ ret = register_reboot_notifier(&wdt_notifier);
+ if(ret) {
+ printk(KERN_ERR "wdt: can't register reboot notifier (err=%d)\n", ret);
+ goto outreg;
+ }
+
+#ifdef CONFIG_WDT_501
+ ret = misc_register(&temp_miscdev);
+ if (ret) {
+ printk(KERN_ERR "wdt: can't misc_register (temp) on minor=%d\n", TEMP_MINOR);
+ goto outrbt;
+ }
+#endif
+
+ ret = 0;
+ printk(KERN_INFO "WDT500/501-P driver 0.07 at %X (Interrupt %d)\n", io, irq);
+out:
+ return ret;
+
+#ifdef CONFIG_WDT_501
+outrbt:
+ unregister_reboot_notifier(&wdt_notifier);
+#endif
+
+outreg:
+ release_region(io,8);
+outirq:
+ free_irq(irq, NULL);
+outmisc:
+ misc_deregister(&wdt_miscdev);
+ goto out;
+}
+
+module_init(wdt_init);
+module_exit(wdt_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("Driver for ISA ICS watchdog cards (WDT500/501)");
+MODULE_LICENSE("GPL");
+EXPORT_NO_SYMBOLS;
diff -uNr linux-2.5.2/drivers/char/wdt285.c linux-2.5.2-wd/drivers/char/wdt285.c
--- linux-2.5.2/drivers/char/wdt285.c Fri Nov 30 08:26:04 2001
+++ linux-2.5.2-wd/drivers/char/wdt285.c Mon Jan 21 16:51:19 2002
@@ -124,10 +124,10 @@
static int watchdog_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- int i;
+ int i, new_margin;
static struct watchdog_info ident=
{
- 0,
+ WDIOF_SETTIMEOUT,
0,
"Footbridge Watchdog"
};
@@ -147,6 +147,17 @@
case WDIOC_KEEPALIVE:
watchdog_ping();
return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int *)arg))
+ return -EFAULT;
+ /* Arbitrary, can't find the card's limits */
+ if ((new_marg < 0) || (new_margin > 60))
+ return -EINVAL;
+ soft_margin = new_margin;
+ watchdog_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(soft_margin, (int *)arg);
}
}

diff -uNr linux-2.5.2/drivers/char/wdt285.c~ linux-2.5.2-wd/drivers/char/wdt285.c~
--- linux-2.5.2/drivers/char/wdt285.c~ Wed Dec 31 16:00:00 1969
+++ linux-2.5.2-wd/drivers/char/wdt285.c~ Fri Nov 30 08:26:04 2001
@@ -0,0 +1,197 @@
+/*
+ * Intel 21285 watchdog driver
+ * Copyright (c) Phil Blundell <pb@nexus.co.uk>, 1998
+ *
+ * based on
+ *
+ * SoftDog 0.05: A Software Watchdog Device
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, 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
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/smp_lock.h>
+
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/hardware/dec21285.h>
+
+/*
+ * Define this to stop the watchdog actually rebooting the machine.
+ */
+#undef ONLY_TESTING
+
+#define TIMER_MARGIN 60 /* (secs) Default is 1 minute */
+
+#define FCLK (50*1000*1000) /* 50MHz */
+
+static int soft_margin = TIMER_MARGIN; /* in seconds */
+static int timer_alive;
+
+#ifdef ONLY_TESTING
+/*
+ * If the timer expires..
+ */
+
+static void watchdog_fire(int irq, void *dev_id, struct pt_regs *regs)
+{
+ printk(KERN_CRIT "Watchdog: Would Reboot.\n");
+ *CSR_TIMER4_CNTL = 0;
+ *CSR_TIMER4_CLR = 0;
+}
+#endif
+
+static void watchdog_ping(void)
+{
+ /*
+ * Refresh the timer.
+ */
+ *CSR_TIMER4_LOAD = soft_margin * (FCLK / 256);
+}
+
+/*
+ * Allow only one person to hold it open
+ */
+
+static int watchdog_open(struct inode *inode, struct file *file)
+{
+ if(timer_alive)
+ return -EBUSY;
+ /*
+ * Ahead watchdog factor ten, Mr Sulu
+ */
+ *CSR_TIMER4_CLR = 0;
+ watchdog_ping();
+ *CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_AUTORELOAD
+ | TIMER_CNTL_DIV256;
+#ifdef ONLY_TESTING
+ request_irq(IRQ_TIMER4, watchdog_fire, 0, "watchdog", NULL);
+#else
+ *CSR_SA110_CNTL |= 1 << 13;
+ MOD_INC_USE_COUNT;
+#endif
+ timer_alive = 1;
+ return 0;
+}
+
+static int watchdog_release(struct inode *inode, struct file *file)
+{
+#ifdef ONLY_TESTING
+ free_irq(IRQ_TIMER4, NULL);
+ timer_alive = 0;
+#else
+ /*
+ * It's irreversible!
+ */
+#endif
+ return 0;
+}
+
+static ssize_t watchdog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ /* Can't seek (pwrite) on this device */
+ if (ppos != &file->f_pos)
+ return -ESPIPE;
+
+ /*
+ * Refresh the timer.
+ */
+ if(len)
+ {
+ watchdog_ping();
+ return 1;
+ }
+ return 0;
+}
+
+static int watchdog_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int i;
+ static struct watchdog_info ident=
+ {
+ 0,
+ 0,
+ "Footbridge Watchdog"
+ };
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ i = verify_area(VERIFY_WRITE, (void*) arg, sizeof(struct watchdog_info));
+ if (i)
+ return i;
+ else
+ return copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident));
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0,(int *)arg);
+ case WDIOC_KEEPALIVE:
+ watchdog_ping();
+ return 0;
+ }
+}
+
+static struct file_operations watchdog_fops=
+{
+ owner: THIS_MODULE,
+ write: watchdog_write,
+ ioctl: watchdog_ioctl,
+ open: watchdog_open,
+ release: watchdog_release,
+};
+
+static struct miscdevice watchdog_miscdev=
+{
+ WATCHDOG_MINOR,
+ "watchdog",
+ &watchdog_fops
+};
+
+static int __init footbridge_watchdog_init(void)
+{
+ if (machine_is_netwinder())
+ return -ENODEV;
+
+ misc_register(&watchdog_miscdev);
+ printk("Footbridge Watchdog Timer: 0.01, timer margin: %d sec\n",
+ soft_margin);
+ if (machine_is_cats())
+ printk("Warning: Watchdog reset may not work on this machine.\n");
+ return 0;
+}
+
+static void __exit footbridge_watchdog_exit(void)
+{
+ misc_deregister(&watchdog_miscdev);
+}
+
+EXPORT_NO_SYMBOLS;
+
+MODULE_AUTHOR("Phil Blundell <pb@nexus.co.uk>");
+MODULE_DESCRIPTION("21285 watchdog driver");
+MODULE_LICENSE("GPL");
+
+MODULE_PARM(soft_margin,"i");
+MODULE_PARM_DESC(soft_margin,"Watchdog timeout in seconds");
+
+module_init(footbridge_watchdog_init);
+module_exit(footbridge_watchdog_exit);
diff -uNr linux-2.5.2/drivers/char/wdt_pci.c linux-2.5.2-wd/drivers/char/wdt_pci.c
--- linux-2.5.2/drivers/char/wdt_pci.c Thu Jan 3 12:20:10 2002
+++ linux-2.5.2-wd/drivers/char/wdt_pci.c Mon Jan 21 16:51:19 2002
@@ -30,6 +30,7 @@
* Alan Cox : Split ISA and PCI cards into two drivers
* Jeff Garzik : PCI cleanups
* Tigran Aivazian : Restructured wdtpci_init_one() to handle failures
+ * Joel Becker : Added WDIOC_GET/SETTIMEOUT
*/

#include <linux/config.h>
@@ -81,8 +82,11 @@
static int io=0x240;
static int irq=11;

+/* Default timeout */
#define WD_TIMO (100*60) /* 1 minute */

+static int wd_margin = WD_TIMO;
+
#ifndef MODULE

/**
@@ -232,7 +236,7 @@
/* Write a watchdog value */
inb_p(WDT_DC);
wdtpci_ctr_mode(1,2);
- wdtpci_ctr_load(1,WD_TIMO); /* Timeout */
+ wdtpci_ctr_load(1,wd_margin); /* Timeout */
outb_p(0, WDT_DC);
}

@@ -310,10 +314,12 @@
static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
+ int new_margin;
static struct watchdog_info ident=
{
WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER
- |WDIOF_EXTERN1|WDIOF_EXTERN2|WDIOF_FANFAULT,
+ |WDIOF_EXTERN1|WDIOF_EXTERN2|WDIOF_FANFAULT
+ |WDIOF_SETTIMEOUT,
1,
"WDT500/501PCI"
};
@@ -333,6 +339,17 @@
case WDIOC_KEEPALIVE:
wdtpci_ping();
return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int *)arg))
+ return -EFAULT;
+ /* Arbitrary, can't find the card's limits */
+ if ((new_margin < 0) || (new_margin > 60))
+ return -EINVAL;
+ wd_margin = new_margin * 100;
+ wdtpci_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(wd_margin, (int *)arg);
}
}

@@ -385,7 +402,7 @@
wdtpci_ctr_mode(1,2);
wdtpci_ctr_mode(2,1);
wdtpci_ctr_load(0,20833); /* count at 100Hz */
- wdtpci_ctr_load(1,WD_TIMO);/* Timeout 60 seconds */
+ wdtpci_ctr_load(1,wd_margin);/* Timeout 60 seconds */
/* DO NOT LOAD CTR2 on PCI card! -- JPN */
outb_p(0, WDT_DC); /* Enable */
return 0;
diff -uNr linux-2.5.2/drivers/sbus/char/riowatchdog.c linux-2.5.2-wd/drivers/sbus/char/riowatchdog.c
--- linux-2.5.2/drivers/sbus/char/riowatchdog.c Wed Oct 10 23:42:47 2001
+++ linux-2.5.2-wd/drivers/sbus/char/riowatchdog.c Mon Jan 21 16:51:19 2002
@@ -127,7 +127,9 @@
static int riowd_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
- static struct watchdog_info info = { 0, 0, "Natl. Semiconductor PC97317" };
+ static struct watchdog_info info = {
+ WDIOF_SETTIMEOUT, 0, "Natl. Semiconductor PC97317"
+ };
unsigned int options;

switch (cmd) {
@@ -158,6 +160,18 @@
return -EINVAL;

break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int *)arg))
+ return -EFAULT;
+ if ((new_margin < 60) || (new_margin > (255 * 60)))
+ return -EINVAL;
+ riowd_timeout = (new_margin + 59) / 60;
+ riowd_pingtimer();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(riowd_timeout * 60, (int *)arg);

default:
return -EINVAL;
diff -uNr linux-2.5.2/include/linux/watchdog.h linux-2.5.2-wd/include/linux/watchdog.h
--- linux-2.5.2/include/linux/watchdog.h Fri Nov 9 14:11:15 2001
+++ linux-2.5.2-wd/include/linux/watchdog.h Mon Jan 21 16:51:19 2002
@@ -25,7 +25,8 @@
#define WDIOC_GETTEMP _IOR(WATCHDOG_IOCTL_BASE, 3, int)
#define WDIOC_SETOPTIONS _IOR(WATCHDOG_IOCTL_BASE, 4, int)
#define WDIOC_KEEPALIVE _IOR(WATCHDOG_IOCTL_BASE, 5, int)
-#define WDIOC_SETTIMEOUT _IOW(WATCHDOG_IOCTL_BASE, 6, int)
+#define WDIOC_SETTIMEOUT _IOWR(WATCHDOG_IOCTL_BASE, 6, int)
+#define WDIOC_GETTIMEOUT _IOR(WATCHDOG_IOCTL_BASE, 7, int)

#define WDIOF_UNKNOWN -1 /* Unknown flag error */
#define WDIOS_UNKNOWN -1 /* Unknown status error */
@@ -37,6 +38,7 @@
#define WDIOF_POWERUNDER 0x0010 /* Power bad/power fault */
#define WDIOF_CARDRESET 0x0020 /* Card previously reset the CPU */
#define WDIOF_POWEROVER 0x0040 /* Power over voltage */
+#define WDIOF_SETTIMEOUT 0x0080 /* Set timeout (in seconds) */
#define WDIOF_KEEPALIVEPING 0x8000 /* Keep alive ping reply */

#define WDIOS_DISABLECARD 0x0001 /* Turn off the watchdog timer */
--

"Can any of you seriously say the Bill of Rights could get through
Congress today? It wouldn't even get out of committee."
- F. Lee Bailey

http://www.jlbec.org/
jlbec@evilplan.org
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