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Commit 72f7e48f authored by Linus Torvalds's avatar Linus Torvalds
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Merge http://linux-watchdog.bkbits.net/linux-2.6-watchdog 

into ppc970.osdl.org:/home/torvalds/v2.6/linux
parents cfc615f2 84d1e7b7
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Showing with 868 additions and 579 deletions
drivers/char/watchdog/pcwd.c
View file @ 72f7e48f
......@@ -71,7 +71,7 @@
*/
static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 };
#define WD_VER "1.12 (12/14/2001)"
#define WD_VER "1.14 (03/12/2004)"
/*
* It should be noted that PCWD_REVISION_B was removed because A and B
......@@ -227,6 +227,45 @@ void pcwd_showprevstate(void)
}
}
static int pcwd_start(void)
{
int stat_reg;
/* Enable the port */
if (revision == PCWD_REVISION_C) {
spin_lock(&io_lock);
outb_p(0x00, current_readport + 3);
stat_reg = inb_p(current_readport + 2);
spin_unlock(&io_lock);
if (stat_reg & 0x10)
{
printk(KERN_INFO "pcwd: Could not start watchdog.\n");
return -EIO;
}
}
return 0;
}
static int pcwd_stop(void)
{
int stat_reg;
/* Disable the board */
if (revision == PCWD_REVISION_C) {
spin_lock(&io_lock);
outb_p(0xA5, current_readport + 3);
outb_p(0xA5, current_readport + 3);
stat_reg = inb_p(current_readport + 2);
spin_unlock(&io_lock);
if ((stat_reg & 0x10) == 0)
{
printk(KERN_INFO "pcwd: Could not stop watchdog.\n");
return -EIO;
}
}
return 0;
}
static void pcwd_send_heartbeat(void)
{
int wdrst_stat;
......@@ -242,13 +281,41 @@ static void pcwd_send_heartbeat(void)
outb_p(wdrst_stat, current_readport);
}
static int pcwd_get_temperature(int *temperature)
{
/* check that port 0 gives temperature info and no command results */
if (mode_debug)
return -1;
*temperature = 0;
if (!supports_temp)
return -ENODEV;
/*
* Convert celsius to fahrenheit, since this was
* the decided 'standard' for this return value.
*/
spin_lock(&io_lock);
*temperature = ((inb(current_readport)) * 9 / 5) + 32;
spin_unlock(&io_lock);
return 0;
}
/*
* /dev/watchdog handling
*/
static int pcwd_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int cdat, rv;
int temperature;
static struct watchdog_info ident=
{
.options = WDIOF_OVERHEAT|WDIOF_CARDRESET,
.options = WDIOF_OVERHEAT |
WDIOF_CARDRESET |
WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "PCWD",
};
......@@ -332,17 +399,10 @@ static int pcwd_ioctl(struct inode *inode, struct file *file,
case WDIOC_GETTEMP:
rv = 0;
if ((supports_temp) && (mode_debug == 0))
{
spin_lock(&io_lock);
rv = inb(current_readport);
spin_unlock(&io_lock);
if(put_user(rv, (int*) arg))
if (pcwd_get_temperature(&temperature))
return -EFAULT;
} else if(put_user(rv, (int*) arg))
return -EFAULT;
return 0;
return put_user(temperature, (int *) arg);
case WDIOC_SETOPTIONS:
if (revision == PCWD_REVISION_C)
......@@ -352,32 +412,12 @@ static int pcwd_ioctl(struct inode *inode, struct file *file,
if (rv & WDIOS_DISABLECARD)
{
spin_lock(&io_lock);
outb_p(0xA5, current_readport + 3);
outb_p(0xA5, current_readport + 3);
cdat = inb_p(current_readport + 2);
spin_unlock(&io_lock);
if ((cdat & 0x10) == 0)
{
printk(KERN_INFO "pcwd: Could not disable card.\n");
return -EIO;
}
return 0;
return pcwd_stop();
}
if (rv & WDIOS_ENABLECARD)
{
spin_lock(&io_lock);
outb_p(0x00, current_readport + 3);
cdat = inb_p(current_readport + 2);
spin_unlock(&io_lock);
if (cdat & 0x10)
{
printk(KERN_INFO "pcwd: Could not enable card.\n");
return -EIO;
}
return 0;
return pcwd_start();
}
if (rv & WDIOS_TEMPPANIC)
......@@ -423,72 +463,66 @@ static ssize_t pcwd_write(struct file *file, const char *buf, size_t len,
return len;
}
static int pcwd_open(struct inode *ino, struct file *filep)
static int pcwd_open(struct inode *inode, struct file *file)
{
switch (iminor(ino)) {
case WATCHDOG_MINOR:
if (!atomic_dec_and_test(&open_allowed) ) {
atomic_inc( &open_allowed );
return -EBUSY;
}
if (nowayout)
__module_get(THIS_MODULE);
/* Enable the port */
if (revision == PCWD_REVISION_C) {
spin_lock(&io_lock);
outb_p(0x00, current_readport + 3);
spin_unlock(&io_lock);
}
return(0);
case TEMP_MINOR:
/* Activate */
pcwd_start();
return(0);
default:
return (-ENODEV);
}
static int pcwd_close(struct inode *inode, struct file *file)
{
if (expect_close == 42) {
pcwd_stop();
atomic_inc( &open_allowed );
} else {
printk(KERN_CRIT "pcwd: Unexpected close, not stopping watchdog!\n");
pcwd_send_heartbeat();
}
expect_close = 0;
return 0;
}
static ssize_t pcwd_read(struct file *file, char *buf, size_t count,
/*
* /dev/temperature handling
*/
static ssize_t pcwd_temp_read(struct file *file, char *buf, size_t count,
loff_t *ppos)
{
unsigned short c;
unsigned char cp;
int temperature;
/* Can't seek (pread) on this device */
if (ppos != &file->f_pos)
return -ESPIPE;
switch(iminor(file->f_dentry->d_inode))
{
case TEMP_MINOR:
/*
* Convert metric to Fahrenheit, since this was
* the decided 'standard' for this return value.
*/
c = inb(current_readport);
cp = (c * 9 / 5) + 32;
if(copy_to_user(buf, &cp, 1))
if (pcwd_get_temperature(&temperature))
return -EFAULT;
if (copy_to_user(buf, &temperature, 1))
return -EFAULT;
return 1;
default:
return -EINVAL;
}
}
static int pcwd_close(struct inode *ino, struct file *filep)
static int pcwd_temp_open(struct inode *inode, struct file *file)
{
if (!supports_temp)
return -ENODEV;
return 0;
}
static int pcwd_temp_close(struct inode *inode, struct file *file)
{
if (iminor(ino)==WATCHDOG_MINOR) {
if (expect_close == 42) {
/* Disable the board */
if (revision == PCWD_REVISION_C) {
spin_lock(&io_lock);
outb_p(0xA5, current_readport + 3);
outb_p(0xA5, current_readport + 3);
spin_unlock(&io_lock);
}
atomic_inc( &open_allowed );
}
}
expect_close = 0;
return 0;
}
......@@ -569,7 +603,7 @@ static void debug_off(void)
static struct file_operations pcwd_fops = {
.owner = THIS_MODULE,
.read = pcwd_read,
.llseek = no_llseek,
.write = pcwd_write,
.ioctl = pcwd_ioctl,
.open = pcwd_open,
......@@ -582,10 +616,18 @@ static struct miscdevice pcwd_miscdev = {
.fops = &pcwd_fops,
};
static struct file_operations pcwd_temp_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = pcwd_temp_read,
.open = pcwd_temp_open,
.release = pcwd_temp_close,
};
static struct miscdevice temp_miscdev = {
.minor = TEMP_MINOR,
.name = "temperature",
.fops = &pcwd_fops,
.fops = &pcwd_temp_fops,
};
static void __init pcwd_validate_timeout(void)
......
drivers/char/watchdog/softdog.c
View file @ 72f7e48f
/*
* SoftDog 0.06: A Software Watchdog Device
* SoftDog 0.07: A Software Watchdog Device
*
* (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
* http://www.redhat.com
......@@ -40,26 +40,21 @@
#include <linux/moduleparam.h>
#include <linux/config.h>
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/fs.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#define TIMER_MARGIN 60 /* (secs) Default is 1 minute */
#define PFX "SoftDog: "
static char expect_close;
#define TIMER_MARGIN 60 /* Default is 60 seconds */
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_param(soft_margin, int, 0);
module_param(soft_noboot, int, 0);
MODULE_LICENSE("GPL");
MODULE_PARM_DESC(soft_margin, "Watchdog soft_margin in seconds. (0<soft_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
static int nowayout = 1;
......@@ -70,6 +65,15 @@ static int nowayout = 0;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
#ifdef ONLY_TESTING
static int soft_noboot = 1;
#else
static int soft_noboot = 0;
#endif /* ONLY_TESTING */
module_param(soft_noboot, int, 0);
MODULE_PARM_DESC(soft_noboot, "Softdog action, set to 1 to ignore reboots, 0 to reboot (default depends on ONLY_TESTING)");
/*
* Our timer
*/
......@@ -79,6 +83,7 @@ static void watchdog_fire(unsigned long);
static struct timer_list watchdog_ticktock =
TIMER_INITIALIZER(watchdog_fire, 0, 0);
static unsigned long timer_alive;
static char expect_close;
/*
......@@ -88,17 +93,42 @@ static unsigned long timer_alive;
static void watchdog_fire(unsigned long data)
{
if (soft_noboot)
printk(KERN_CRIT "SOFTDOG: Triggered - Reboot ignored.\n");
printk(KERN_CRIT PFX "Triggered - Reboot ignored.\n");
else
{
printk(KERN_CRIT "SOFTDOG: Initiating system reboot.\n");
printk(KERN_CRIT PFX "Initiating system reboot.\n");
machine_restart(NULL);
printk("SOFTDOG: Reboot didn't ?????\n");
printk(KERN_CRIT PFX "Reboot didn't ?????\n");
}
}
/*
* Allow only one person to hold it open
* Softdog operations
*/
static int softdog_keepalive(void)
{
mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
return 0;
}
static int softdog_stop(void)
{
del_timer(&watchdog_ticktock);
return 0;
}
static int softdog_set_heartbeat(int t)
{
if ((t < 0x0001) || (t > 0xFFFF))
return -EINVAL;
soft_margin = t;
return 0;
}
/*
* /dev/watchdog handling
*/
static int softdog_open(struct inode *inode, struct file *file)
......@@ -110,7 +140,7 @@ static int softdog_open(struct inode *inode, struct file *file)
/*
* Activate timer
*/
mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
softdog_keepalive();
return 0;
}
......@@ -121,9 +151,10 @@ static int softdog_release(struct inode *inode, struct file *file)
* Lock it in if it's a module and we set nowayout
*/
if (expect_close == 42) {
del_timer(&watchdog_ticktock);
softdog_stop();
} else {
printk(KERN_CRIT "SOFTDOG: WDT device closed unexpectedly. WDT will not stop!\n");
printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
softdog_keepalive();
}
clear_bit(0, &timer_alive);
expect_close = 0;
......@@ -155,7 +186,7 @@ static ssize_t softdog_write(struct file *file, const char *data, size_t len, lo
expect_close = 42;
}
}
mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
softdog_keepalive();
}
return len;
}
......@@ -165,37 +196,57 @@ static int softdog_ioctl(struct inode *inode, struct file *file,
{
int new_margin;
static struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
.options = WDIOF_SETTIMEOUT |
WDIOF_KEEPALIVEPING |
WDIOF_MAGICCLOSE,
.firmware_version = 0,
.identity = "Software Watchdog",
};
switch (cmd) {
default:
return -ENOIOCTLCMD;
case WDIOC_GETSUPPORT:
if(copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident)))
return -EFAULT;
return 0;
return copy_to_user((struct watchdog_info *)arg, &ident,
sizeof(ident)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
return put_user(0,(int *)arg);
case WDIOC_KEEPALIVE:
mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
softdog_keepalive();
return 0;
case WDIOC_SETTIMEOUT:
if (get_user(new_margin, (int *)arg))
return -EFAULT;
if (new_margin < 1)
if (softdog_set_heartbeat(new_margin))
return -EINVAL;
soft_margin = new_margin;
mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
softdog_keepalive();
/* Fall */
case WDIOC_GETTIMEOUT:
return put_user(soft_margin, (int *)arg);
}
}
/*
* Notifier for system down
*/
static int softdog_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
if(code==SYS_DOWN || code==SYS_HALT) {
/* Turn the WDT off */
softdog_stop();
}
return NOTIFY_DONE;
}
/*
* Kernel Interfaces
*/
static struct file_operations softdog_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = softdog_write,
.ioctl = softdog_ioctl,
.open = softdog_open,
......@@ -208,18 +259,39 @@ static struct miscdevice softdog_miscdev = {
.fops = &softdog_fops,
};
static char banner[] __initdata = KERN_INFO "Software Watchdog Timer: 0.06, soft_margin: %d sec, nowayout: %d\n";
static struct notifier_block softdog_notifier = {
.notifier_call = softdog_notify_sys,
};
static char banner[] __initdata = KERN_INFO "Software Watchdog Timer: 0.07 initialized. soft_noboot=%d soft_margin=%d sec (nowayout= %d)\n";
static int __init watchdog_init(void)
{
int ret;
ret = misc_register(&softdog_miscdev);
/* Check that the soft_margin value is within it's range ; if not reset to the default */
if (softdog_set_heartbeat(soft_margin)) {
softdog_set_heartbeat(TIMER_MARGIN);
printk(KERN_INFO PFX "soft_margin value must be 0<soft_margin<65536, using %d\n",
TIMER_MARGIN);
}
if (ret)
ret = register_reboot_notifier(&softdog_notifier);
if (ret) {
printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
ret);
return ret;
}
ret = misc_register(&softdog_miscdev);
if (ret) {
printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
unregister_reboot_notifier(&softdog_notifier);
return ret;
}
printk(banner, soft_margin, nowayout);
printk(banner, soft_noboot, soft_margin, nowayout);
return 0;
}
......@@ -227,6 +299,7 @@ static int __init watchdog_init(void)
static void __exit watchdog_exit(void)
{
misc_deregister(&softdog_miscdev);
unregister_reboot_notifier(&softdog_notifier);
}
module_init(watchdog_init);
......
drivers/char/watchdog/wd501p.h
View file @ 72f7e48f
/*
* Industrial Computer Source WDT500/501 driver for Linux 1.3.x
* Industrial Computer Source WDT500/501 driver
*
* (c) Copyright 1995 CymruNET Ltd
* Innovation Centre
......@@ -40,52 +40,13 @@
/* programmable outputs: */
#define WDT_PROGOUT (io+15) /* wr=enable, rd=disable */
#define WDC_SR_WCCR 1 /* Active low */
#define WDC_SR_TGOOD 2
#define WDC_SR_ISOI0 4
#define WDC_SR_ISII1 8
#define WDC_SR_FANGOOD 16
#define WDC_SR_PSUOVER 32 /* Active low */
#define WDC_SR_PSUUNDR 64 /* Active low */
#define WDC_SR_IRQ 128 /* Active low */
/* FAN 501 500 */
#define WDC_SR_WCCR 1 /* Active low */ /* X X X */
#define WDC_SR_TGOOD 2 /* X X - */
#define WDC_SR_ISOI0 4 /* X X X */
#define WDC_SR_ISII1 8 /* X X X */
#define WDC_SR_FANGOOD 16 /* X - - */
#define WDC_SR_PSUOVER 32 /* Active low */ /* X X - */
#define WDC_SR_PSUUNDR 64 /* Active low */ /* X X - */
#define WDC_SR_IRQ 128 /* Active low */ /* X X X */
#ifndef WDT_IS_PCI
/*
* Feature Map 1 is the active high inputs not supported on your card.
* Feature Map 2 is the active low inputs not supported on your card.
*/
#ifdef CONFIG_WDT_501 /* Full board */
#ifdef CONFIG_WDT501_FAN /* Full board, Fan has no tachometer */
#define FEATUREMAP1 0
#define WDT_OPTION_MASK (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER|WDIOF_EXTERN1|WDIOF_EXTERN2|WDIOF_FANFAULT)
#else
#define FEATUREMAP1 WDC_SR_FANGOOD
#define WDT_OPTION_MASK (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER|WDIOF_EXTERN1|WDIOF_EXTERN2)
#endif
#define FEATUREMAP2 0
#endif
#ifndef CONFIG_WDT_501
#define CONFIG_WDT_500
#endif
#ifdef CONFIG_WDT_500 /* Minimal board */
#define FEATUREMAP1 (WDC_SR_TGOOD|WDC_SR_FANGOOD)
#define FEATUREMAP2 (WDC_SR_PSUOVER|WDC_SR_PSUUNDR)
#define WDT_OPTION_MASK (WDIOF_OVERHEAT)
#endif
#else
#define FEATUREMAP1 (WDC_SR_TGOOD|WDC_SR_FANGOOD)
#define FEATUREMAP2 (WDC_SR_PSUOVER|WDC_SR_PSUUNDR)
#define WDT_OPTION_MASK (WDIOF_OVERHEAT)
#endif
#ifndef FEATUREMAP1
#error "Config option not set"
#endif
drivers/char/watchdog/wdt.c
View file @ 72f7e48f
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drivers/char/watchdog/wdt_pci.c
View file @ 72f7e48f
This diff is collapsed.
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