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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
/*
* Industrial Computer Source WDT500/501 driver for Linux 2.1.x
* Industrial Computer Source WDT500/501 driver
*
* (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
* http://www.redhat.com
......@@ -15,7 +15,7 @@
*
* (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
*
* Release 0.09.
* Release 0.10.
*
* Fixes
* Dave Gregorich : Modularisation and minor bugs
......@@ -53,17 +53,15 @@ static unsigned long wdt_is_open;
static char expect_close;
/*
* You must set these - there is no sane way to probe for this board.
* You can use wdt=x,y to set these now.
* Module parameters
*/
static int io=0x240;
static int irq=11;
#define WD_TIMO 60 /* Default heartbeat = 60 seconds */
/* Default margin */
#define WD_TIMO (100*60) /* 1 minute */
static int wd_margin = WD_TIMO;
static int heartbeat = WD_TIMO;
static int wd_heartbeat;
module_param(heartbeat, int, 0);
MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
static int nowayout = 1;
......@@ -74,11 +72,23 @@ static int nowayout = 0;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
/* You must set these - there is no sane way to probe for this board. */
static int io=0x240;
static int irq=11;
module_param(io, int, 0);
MODULE_PARM_DESC(io, "WDT io port (default=0x240)");
module_param(irq, int, 0);
MODULE_PARM_DESC(irq, "WDT irq (default=11)");
#ifdef CONFIG_WDT_501
/* Support for the Fan Tachometer on the WDT501-P */
static int tachometer;
module_param(tachometer, int, 0);
MODULE_PARM_DESC(tachometer, "WDT501-P Fan Tachometer support (0=disable, default=0)");
#endif /* CONFIG_WDT_501 */
/*
* Programming support
*/
......@@ -97,13 +107,77 @@ static void wdt_ctr_load(int ctr, int val)
outb_p(val>>8, WDT_COUNT0+ctr);
}
/*
* Kernel methods.
/**
* wdt_start:
*
* Start the watchdog driver.
*/
static int wdt_start(void)
{
inb_p(WDT_DC); /* Disable watchdog */
wdt_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
wdt_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
wdt_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
wdt_ctr_load(0, 8948); /* Count at 100Hz */
wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
wdt_ctr_load(2,65535); /* Length of reset pulse */
outb_p(0, WDT_DC); /* Enable watchdog */
return 0;
}
/**
* wdt_stop:
*
* Stop the watchdog driver.
*/
static int wdt_stop (void)
{
/* Turn the card off */
inb_p(WDT_DC); /* Disable watchdog */
wdt_ctr_load(2,0); /* 0 length reset pulses now */
return 0;
}
/**
* wdt_ping:
*
* Reload counter one with the watchdog heartbeat. We don't bother reloading
* the cascade counter.
*/
static int wdt_ping(void)
{
/* Write a watchdog value */
inb_p(WDT_DC); /* Disable watchdog */
wdt_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
outb_p(0, WDT_DC); /* Enable watchdog */
return 0;
}
/**
* wdt_set_heartbeat:
* @t: the new heartbeat value that needs to be set.
*
* Set a new heartbeat value for the watchdog device. If the heartbeat value is
* incorrect we keep the old value and return -EINVAL. If successfull we
* return 0.
*/
static int wdt_set_heartbeat(int t)
{
if ((t < 1) || (t > 65535))
return -EINVAL;
heartbeat = t;
wd_heartbeat = t * 100;
return 0;
}
/**
* wdt_status:
* wdt_get_status:
* @status: the new 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
......@@ -112,31 +186,46 @@ static void wdt_ctr_load(int ctr, int val)
* we then map the bits onto the status ioctl flags.
*/
static int wdt_status(void)
static int wdt_get_status(int *status)
{
/*
* Status register to bit flags
unsigned char new_status=inb_p(WDT_SR);
*status=0;
if (new_status & WDC_SR_ISOI0)
*status |= WDIOF_EXTERN1;
if (new_status & WDC_SR_ISII1)
*status |= WDIOF_EXTERN2;
#ifdef CONFIG_WDT_501
if (!(new_status & WDC_SR_TGOOD))
*status |= WDIOF_OVERHEAT;
if (!(new_status & WDC_SR_PSUOVER))
*status |= WDIOF_POWEROVER;
if (!(new_status & WDC_SR_PSUUNDR))
*status |= WDIOF_POWERUNDER;
if (tachometer) {
if (!(new_status & WDC_SR_FANGOOD))
*status |= WDIOF_FANFAULT;
}
#endif /* CONFIG_WDT_501 */
return 0;
}
#ifdef CONFIG_WDT_501
/**
* wdt_get_temperature:
*
* Reports the temperature in degrees Fahrenheit. The API is in
* farenheit. It was designed by an imperial measurement luddite.
*/
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;
static int wdt_get_temperature(int *temperature)
{
unsigned short c=inb_p(WDT_RT);
*temperature = (c * 11 / 15) + 7;
return 0;
}
#endif /* CONFIG_WDT_501 */
/**
* wdt_interrupt:
......@@ -155,23 +244,23 @@ static irqreturn_t 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))
#ifdef CONFIG_WDT_501
if (!(status & WDC_SR_TGOOD))
printk(KERN_CRIT "Overheat alarm.(%d)\n",inb_p(WDT_RT));
if(!(status&WDC_SR_PSUOVER))
if (!(status & WDC_SR_PSUOVER))
printk(KERN_CRIT "PSU over voltage.\n");
if(!(status&WDC_SR_PSUUNDR))
if (!(status & WDC_SR_PSUUNDR))
printk(KERN_CRIT "PSU under voltage.\n");
if(!(status&WDC_SR_FANGOOD))
if (tachometer) {
if (!(status & WDC_SR_FANGOOD))
printk(KERN_CRIT "Possible fan fault.\n");
if(!(status&WDC_SR_WCCR))
}
#endif /* CONFIG_WDT_501 */
if (!(status & WDC_SR_WCCR))
#ifdef SOFTWARE_REBOOT
#ifdef ONLY_TESTING
printk(KERN_CRIT "Would Reboot.\n");
......@@ -186,22 +275,6 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id, struct pt_regs *regs)
}
/**
* 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_margin); /* Timeout */
outb_p(0, WDT_DC);
}
/**
* wdt_write:
* @file: file handle to the watchdog
......@@ -239,40 +312,6 @@ static ssize_t wdt_write(struct file *file, const char *buf, size_t count, loff_
return count;
}
/**
* 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(iminor(file->f_dentry->d_inode))
{
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
......@@ -288,18 +327,25 @@ static ssize_t wdt_read(struct file *file, char *buf, size_t count, loff_t *ptr)
static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
int new_margin;
int new_heartbeat;
int status;
static struct watchdog_info ident=
{
.options = WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER
|WDIOF_EXTERN1|WDIOF_EXTERN2|WDIOF_FANFAULT
|WDIOF_SETTIMEOUT|WDIOF_MAGICCLOSE,
static struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT|
WDIOF_MAGICCLOSE|
WDIOF_KEEPALIVEPING,
.firmware_version = 1,
.identity = "WDT500/501",
};
ident.options&=WDT_OPTION_MASK; /* Mask down to the card we have */
/* Add options according to the card we have */
ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2);
#ifdef CONFIG_WDT_501
ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER);
if (tachometer)
ident.options |= WDIOF_FANFAULT;
#endif /* CONFIG_WDT_501 */
switch(cmd)
{
default:
......@@ -308,23 +354,24 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
return copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident))?-EFAULT:0;
case WDIOC_GETSTATUS:
return put_user(wdt_status(),(int *)arg);
wdt_get_status(&status);
return put_user(status,(int *)arg);
case WDIOC_GETBOOTSTATUS:
return put_user(0, (int *)arg);
case WDIOC_KEEPALIVE:
wdt_ping();
return 0;
case WDIOC_SETTIMEOUT:
if (get_user(new_margin, (int *)arg))
if (get_user(new_heartbeat, (int *)arg))
return -EFAULT;
/* Arbitrary, can't find the card's limits */
if ((new_margin < 0) || (new_margin > 60))
if (wdt_set_heartbeat(new_heartbeat))
return -EINVAL;
wd_margin = new_margin * 100;
wdt_ping();
/* Fall */
case WDIOC_GETTIMEOUT:
return put_user(wd_margin / 100, (int *)arg);
return put_user(heartbeat, (int *)arg);
}
}
......@@ -333,43 +380,26 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
* @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.
* The watchdog device 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(iminor(inode))
{
case WATCHDOG_MINOR:
if(test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
/*
* Activate
*/
wdt_is_open=1;
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_margin); /* Timeout 120 seconds */
wdt_ctr_load(2,65535);
outb_p(0, WDT_DC); /* Enable */
return 0;
case TEMP_MINOR:
wdt_start();
return 0;
default:
return -ENODEV;
}
}
/**
* wdt_close:
* wdt_release:
* @inode: inode to board
* @file: file handle to board
*
......@@ -382,20 +412,73 @@ static int wdt_open(struct inode *inode, struct file *file)
static int wdt_release(struct inode *inode, struct file *file)
{
if(iminor(inode)==WATCHDOG_MINOR)
{
if (expect_close == 42) {
inb_p(WDT_DC); /* Disable counters */
wdt_ctr_load(2,0); /* 0 length reset pulses now */
wdt_stop();
clear_bit(0, &wdt_is_open);
} else {
printk(KERN_CRIT "wdt: WDT device closed unexpectedly. WDT will not stop!\n");
wdt_ping();
}
clear_bit(0, &wdt_is_open);
expect_close = 0;
}
return 0;
}
#ifdef CONFIG_WDT_501
/**
* wdt_temp_read:
* @file: file handle to the watchdog board
* @buf: buffer to write 1 byte into
* @count: length of buffer
* @ptr: offset (no seek allowed)
*
* Temp_read reports the temperature in degrees Fahrenheit. The API is in
* farenheit. It was designed by an imperial measurement luddite.
*/
static ssize_t wdt_temp_read(struct file *file, char *buf, size_t count, loff_t *ptr)
{
int temperature;
/* Can't seek (pread) on this device */
if (ptr != &file->f_pos)
return -ESPIPE;
if (wdt_get_temperature(&temperature))
return -EFAULT;
if (copy_to_user (buf, &temperature, 1))
return -EFAULT;
return 1;
}
/**
* wdt_temp_open:
* @inode: inode of device
* @file: file handle to device
*
* The temperature device has been opened.
*/
static int wdt_temp_open(struct inode *inode, struct file *file)
{
return 0;
}
/**
* wdt_temp_release:
* @inode: inode to board
* @file: file handle to board
*
* The temperature device has been closed.
*/
static int wdt_temp_release(struct inode *inode, struct file *file)
{
return 0;
}
#endif /* CONFIG_WDT_501 */
/**
* notify_sys:
* @this: our notifier block
......@@ -411,11 +494,9 @@ static int wdt_release(struct inode *inode, struct file *file)
static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
if(code==SYS_DOWN || code==SYS_HALT)
{
if(code==SYS_DOWN || code==SYS_HALT) {
/* Turn the card off */
inb_p(WDT_DC);
wdt_ctr_load(2,0);
wdt_stop();
}
return NOTIFY_DONE;
}
......@@ -428,36 +509,40 @@ static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
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=
{
static struct miscdevice wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &wdt_fops,
};
#ifdef CONFIG_WDT_501
static struct miscdevice temp_miscdev=
{
static struct file_operations wdt_temp_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = wdt_temp_read,
.open = wdt_temp_open,
.release = wdt_temp_release,
};
static struct miscdevice temp_miscdev = {
.minor = TEMP_MINOR,
.name = "temperature",
.fops = &wdt_fops,
.fops = &wdt_temp_fops,
};
#endif
#endif /* CONFIG_WDT_501 */
/*
* The WDT card needs to learn about soft shutdowns in order to
* turn the timebomb registers off.
*/
static struct notifier_block wdt_notifier=
{
static struct notifier_block wdt_notifier = {
.notifier_call = wdt_notify_sys,
};
......@@ -476,10 +561,10 @@ static void __exit wdt_exit(void)
misc_deregister(&wdt_miscdev);
#ifdef CONFIG_WDT_501
misc_deregister(&temp_miscdev);
#endif
#endif /* CONFIG_WDT_501 */
unregister_reboot_notifier(&wdt_notifier);
release_region(io,8);
free_irq(irq, NULL);
release_region(io,8);
}
/**
......@@ -494,51 +579,67 @@ 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);
/* Check that the heartbeat value is within it's range ; if not reset to the default */
if (wdt_set_heartbeat(heartbeat)) {
wdt_set_heartbeat(WD_TIMO);
printk(KERN_INFO "wdt: heartbeat value must be 0<heartbeat<65536, using %d\n",
WD_TIMO);
}
if (!request_region(io, 8, "wdt501p")) {
printk(KERN_ERR "wdt: I/O address 0x%04x already in use\n", io);
ret = -EBUSY;
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;
goto outreg;
}
ret = register_reboot_notifier(&wdt_notifier);
if(ret) {
printk(KERN_ERR "wdt: can't register reboot notifier (err=%d)\n", ret);
goto outreg;
printk(KERN_ERR "wdt: cannot register reboot notifier (err=%d)\n", ret);
goto outirq;
}
#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);
printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
TEMP_MINOR, ret);
goto outrbt;
}
#endif
#endif /* CONFIG_WDT_501 */
ret = misc_register(&wdt_miscdev);
if (ret) {
printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
goto outmisc;
}
ret = 0;
printk(KERN_INFO "WDT500/501-P driver 0.07 at %X (Interrupt %d)\n", io, irq);
printk(KERN_INFO "WDT500/501-P driver 0.10 at 0x%04x (Interrupt %d). heartbeat=%d sec (nowayout=%d)\n",
io, irq, heartbeat, nowayout);
#ifdef CONFIG_WDT_501
printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
#endif /* CONFIG_WDT_501 */
out:
return ret;
outmisc:
#ifdef CONFIG_WDT_501
misc_deregister(&temp_miscdev);
#endif /* 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);
outreg:
release_region(io,8);
goto out;
}
......
drivers/char/watchdog/wdt_pci.c
View file @ 72f7e48f
/*
* Industrial Computer Source WDT500/501 driver for Linux 2.1.x
* Industrial Computer Source PCI-WDT500/501 driver
*
* (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
* http://www.redhat.com
......@@ -15,7 +15,7 @@
*
* (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
*
* Release 0.09.
* Release 0.10.
*
* Fixes
* Dave Gregorich : Modularisation and minor bugs
......@@ -46,6 +46,7 @@
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/pci.h>
#include <asm/io.h>
......@@ -70,6 +71,9 @@
#define PCI_DEVICE_ID_WDG_CSM 0x22c0
#endif
/* We can only use 1 card due to the /dev/watchdog restriction */
static int dev_count;
static struct semaphore open_sem;
static spinlock_t wdtpci_lock;
static char expect_close;
......@@ -78,10 +82,12 @@ static int io;
static int irq;
/* Default timeout */
#define WD_TIMO (100*60) /* 1 minute */
#define WD_TIMO_MAX (WD_TIMO*60) /* 1 hour(?) */
#define WD_TIMO 60 /* Default heartbeat = 60 seconds */
static int wd_margin = WD_TIMO;
static int heartbeat = WD_TIMO;
static int wd_heartbeat;
module_param(heartbeat, int, 0);
MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
static int nowayout = 1;
......@@ -92,6 +98,14 @@ static int nowayout = 0;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
#ifdef CONFIG_WDT_501_PCI
/* Support for the Fan Tachometer on the PCI-WDT501 */
static int tachometer;
module_param(tachometer, int, 0);
MODULE_PARM_DESC(tachometer, "PCI-WDT501 Fan Tachometer support (0=disable, default=0)");
#endif /* CONFIG_WDT_501_PCI */
/*
* Programming support
*/
......@@ -110,13 +124,105 @@ static void wdtpci_ctr_load(int ctr, int val)
outb_p(val>>8, WDT_COUNT0+ctr);
}
/*
* Kernel methods.
/**
* wdtpci_start:
*
* Start the watchdog driver.
*/
static int wdtpci_start(void)
{
unsigned long flags;
spin_lock_irqsave(&wdtpci_lock, flags);
/*
* "pet" the watchdog, as Access says.
* This resets the clock outputs.
*/
inb_p(WDT_DC); /* Disable watchdog */
wdtpci_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
outb_p(0, WDT_DC); /* Enable watchdog */
inb_p(WDT_DC); /* Disable watchdog */
outb_p(0, WDT_CLOCK); /* 2.0833MHz clock */
inb_p(WDT_BUZZER); /* disable */
inb_p(WDT_OPTONOTRST); /* disable */
inb_p(WDT_OPTORST); /* disable */
inb_p(WDT_PROGOUT); /* disable */
wdtpci_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
wdtpci_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
wdtpci_ctr_mode(2,1); /* Program CTR2 for Mode 1: Retriggerable One-Shot */
wdtpci_ctr_load(0,20833); /* count at 100Hz */
wdtpci_ctr_load(1,wd_heartbeat);/* Heartbeat */
/* DO NOT LOAD CTR2 on PCI card! -- JPN */
outb_p(0, WDT_DC); /* Enable watchdog */
spin_unlock_irqrestore(&wdtpci_lock, flags);
return 0;
}
/**
* wdtpci_stop:
*
* Stop the watchdog driver.
*/
static int wdtpci_stop (void)
{
unsigned long flags;
/* Turn the card off */
spin_lock_irqsave(&wdtpci_lock, flags);
inb_p(WDT_DC); /* Disable watchdog */
wdtpci_ctr_load(2,0); /* 0 length reset pulses now */
spin_unlock_irqrestore(&wdtpci_lock, flags);
return 0;
}
/**
* wdtpci_ping:
*
* Reload counter one with the watchdog heartbeat. We don't bother reloading
* the cascade counter.
*/
static int wdtpci_ping(void)
{
unsigned long flags;
/* Write a watchdog value */
spin_lock_irqsave(&wdtpci_lock, flags);
inb_p(WDT_DC); /* Disable watchdog */
wdtpci_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
wdtpci_ctr_load(1,wd_heartbeat);/* Heartbeat */
outb_p(0, WDT_DC); /* Enable watchdog */
spin_unlock_irqrestore(&wdtpci_lock, flags);
return 0;
}
/**
* wdtpci_set_heartbeat:
* @t: the new heartbeat value that needs to be set.
*
* Set a new heartbeat value for the watchdog device. If the heartbeat value is
* incorrect we keep the old value and return -EINVAL. If successfull we
* return 0.
*/
static int wdtpci_set_heartbeat(int t)
{
/* Arbitrary, can't find the card's limits */
if ((t < 1) || (t > 65535))
return -EINVAL;
heartbeat = t;
wd_heartbeat = t * 100;
return 0;
}
/**
* wdtpci_status:
* wdtpci_get_status:
* @status: the new 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
......@@ -125,31 +231,46 @@ static void wdtpci_ctr_load(int ctr, int val)
* we then map the bits onto the status ioctl flags.
*/
static int wdtpci_status(void)
static int wdtpci_get_status(int *status)
{
/*
* Status register to bit flags
unsigned char new_status=inb_p(WDT_SR);
*status=0;
if (new_status & WDC_SR_ISOI0)
*status |= WDIOF_EXTERN1;
if (new_status & WDC_SR_ISII1)
*status |= WDIOF_EXTERN2;
#ifdef CONFIG_WDT_501_PCI
if (!(new_status & WDC_SR_TGOOD))
*status |= WDIOF_OVERHEAT;
if (!(new_status & WDC_SR_PSUOVER))
*status |= WDIOF_POWEROVER;
if (!(new_status & WDC_SR_PSUUNDR))
*status |= WDIOF_POWERUNDER;
if (tachometer) {
if (!(new_status & WDC_SR_FANGOOD))
*status |= WDIOF_FANFAULT;
}
#endif /* CONFIG_WDT_501_PCI */
return 0;
}
#ifdef CONFIG_WDT_501_PCI
/**
* wdtpci_get_temperature:
*
* Reports the temperature in degrees Fahrenheit. The API is in
* farenheit. It was designed by an imperial measurement luddite.
*/
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;
static int wdtpci_get_temperature(int *temperature)
{
unsigned short c=inb_p(WDT_RT);
*temperature = (c * 11 / 15) + 7;
return 0;
}
#endif /* CONFIG_WDT_501_PCI */
/**
* wdtpci_interrupt:
......@@ -168,57 +289,37 @@ static irqreturn_t wdtpci_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 PFX "status %d\n", status);
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 CONFIG_WDT_501_PCI
if (!(status & WDC_SR_TGOOD))
printk(KERN_CRIT PFX "Overheat alarm.(%d)\n",inb_p(WDT_RT));
if (!(status & WDC_SR_PSUOVER))
printk(KERN_CRIT PFX "PSU over voltage.\n");
if (!(status & WDC_SR_PSUUNDR))
printk(KERN_CRIT PFX "PSU under voltage.\n");
if (tachometer) {
if (!(status & WDC_SR_FANGOOD))
printk(KERN_CRIT PFX "Possible fan fault.\n");
}
#endif /* CONFIG_WDT_501_PCI */
if (!(status&WDC_SR_WCCR))
#ifdef SOFTWARE_REBOOT
#ifdef ONLY_TESTING
printk(KERN_CRIT "Would Reboot.\n");
printk(KERN_CRIT PFX "Would Reboot.\n");
#else
printk(KERN_CRIT "Initiating system reboot.\n");
printk(KERN_CRIT PFX "Initiating system reboot.\n");
machine_restart(NULL);
#endif
#else
printk(KERN_CRIT "Reset in 5ms.\n");
printk(KERN_CRIT PFX "Reset in 5ms.\n");
#endif
return IRQ_HANDLED;
}
/**
* wdtpci_ping:
*
* Reload counter one with the watchdog timeout. We don't bother reloading
* the cascade counter.
*/
static void wdtpci_ping(void)
{
unsigned long flags;
/* Write a watchdog value */
spin_lock_irqsave(&wdtpci_lock, flags);
inb_p(WDT_DC);
wdtpci_ctr_mode(1,2);
wdtpci_ctr_load(1,wd_margin); /* Timeout */
outb_p(0, WDT_DC);
spin_unlock_irqrestore(&wdtpci_lock, flags);
}
/**
* wdtpci_write:
* @file: file handle to the watchdog
......@@ -256,40 +357,6 @@ static ssize_t wdtpci_write(struct file *file, const char *buf, size_t count, lo
return count;
}
/**
* wdtpci_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
* fahrenheit. It was designed by an imperial measurement luddite.
*/
static ssize_t wdtpci_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(iminor(file->f_dentry->d_inode))
{
case TEMP_MINOR:
c*=11;
c/=15;
cp=c+7;
if(copy_to_user(buf,&cp,1))
return -EFAULT;
return 1;
default:
return -EINVAL;
}
}
/**
* wdtpci_ioctl:
* @inode: inode of the device
......@@ -305,17 +372,25 @@ static ssize_t wdtpci_read(struct file *file, char *buf, size_t count, loff_t *p
static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
int new_margin;
int new_heartbeat;
int status;
static struct watchdog_info ident = {
.options = WDIOF_OVERHEAT | WDIOF_POWERUNDER |
WDIOF_POWEROVER | WDIOF_EXTERN1 |
WDIOF_EXTERN2 | WDIOF_FANFAULT |
WDIOF_SETTIMEOUT|WDIOF_MAGICCLOSE,
.options = WDIOF_SETTIMEOUT|
WDIOF_MAGICCLOSE|
WDIOF_KEEPALIVEPING,
.firmware_version = 1,
.identity = "WDT500/501PCI",
.identity = "PCI-WDT500/501",
};
ident.options&=WDT_OPTION_MASK; /* Mask down to the card we have */
/* Add options according to the card we have */
ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2);
#ifdef CONFIG_WDT_501_PCI
ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER);
if (tachometer)
ident.options |= WDIOF_FANFAULT;
#endif /* CONFIG_WDT_501_PCI */
switch(cmd)
{
default:
......@@ -324,24 +399,24 @@ static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd
return copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident))?-EFAULT:0;
case WDIOC_GETSTATUS:
return put_user(wdtpci_status(),(int *)arg);
wdtpci_get_status(&status);
return put_user(status,(int *)arg);
case WDIOC_GETBOOTSTATUS:
return put_user(0, (int *)arg);
case WDIOC_KEEPALIVE:
wdtpci_ping();
return 0;
case WDIOC_SETTIMEOUT:
if (get_user(new_margin, (int *)arg))
if (get_user(new_heartbeat, (int *)arg))
return -EFAULT;
/* Arbitrary, can't find the card's limits */
new_margin *= 100;
if ((new_margin < 0) || (new_margin > WD_TIMO_MAX))
if (wdtpci_set_heartbeat(new_heartbeat))
return -EINVAL;
wd_margin = new_margin;
wdtpci_ping();
/* Fall */
case WDIOC_GETTIMEOUT:
return put_user(wd_margin / 100, (int *)arg);
return put_user(heartbeat, (int *)arg);
}
}
......@@ -350,20 +425,15 @@ static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd
* @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.
* The watchdog device 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 wdtpci_open(struct inode *inode, struct file *file)
{
unsigned long flags;
switch(iminor(inode))
{
case WATCHDOG_MINOR:
if (down_trylock(&open_sem))
return -EBUSY;
......@@ -373,43 +443,12 @@ static int wdtpci_open(struct inode *inode, struct file *file)
/*
* Activate
*/
spin_lock_irqsave(&wdtpci_lock, flags);
inb_p(WDT_DC); /* Disable */
/*
* "pet" the watchdog, as Access says.
* This resets the clock outputs.
*/
wdtpci_ctr_mode(2,0);
outb_p(0, WDT_DC);
inb_p(WDT_DC);
outb_p(0, WDT_CLOCK); /* 2.0833MHz clock */
inb_p(WDT_BUZZER); /* disable */
inb_p(WDT_OPTONOTRST); /* disable */
inb_p(WDT_OPTORST); /* disable */
inb_p(WDT_PROGOUT); /* disable */
wdtpci_ctr_mode(0,3);
wdtpci_ctr_mode(1,2);
wdtpci_ctr_mode(2,1);
wdtpci_ctr_load(0,20833); /* count at 100Hz */
wdtpci_ctr_load(1,wd_margin);/* Timeout 60 seconds */
/* DO NOT LOAD CTR2 on PCI card! -- JPN */
outb_p(0, WDT_DC); /* Enable */
spin_unlock_irqrestore(&wdtpci_lock, flags);
wdtpci_start();
return 0;
case TEMP_MINOR:
return 0;
default:
return -ENODEV;
}
}
/**
* wdtpci_close:
* wdtpci_release:
* @inode: inode to board
* @file: file handle to board
*
......@@ -422,24 +461,73 @@ static int wdtpci_open(struct inode *inode, struct file *file)
static int wdtpci_release(struct inode *inode, struct file *file)
{
if (iminor(inode)==WATCHDOG_MINOR) {
unsigned long flags;
if (expect_close == 42) {
spin_lock_irqsave(&wdtpci_lock, flags);
inb_p(WDT_DC); /* Disable counters */
wdtpci_ctr_load(2,0); /* 0 length reset pulses now */
spin_unlock_irqrestore(&wdtpci_lock, flags);
wdtpci_stop();
} else {
printk(KERN_CRIT PFX "Unexpected close, not stopping timer!");
wdtpci_ping();
}
expect_close = 0;
up(&open_sem);
}
return 0;
}
#ifdef CONFIG_WDT_501_PCI
/**
* wdtpci_temp_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
* fahrenheit. It was designed by an imperial measurement luddite.
*/
static ssize_t wdtpci_temp_read(struct file *file, char *buf, size_t count, loff_t *ptr)
{
int temperature;
/* Can't seek (pread) on this device */
if (ptr != &file->f_pos)
return -ESPIPE;
if (wdtpci_get_temperature(&temperature))
return -EFAULT;
if (copy_to_user (buf, &temperature, 1))
return -EFAULT;
return 1;
}
/**
* wdtpci_temp_open:
* @inode: inode of device
* @file: file handle to device
*
* The temperature device has been opened.
*/
static int wdtpci_temp_open(struct inode *inode, struct file *file)
{
return 0;
}
/**
* wdtpci_temp_release:
* @inode: inode to board
* @file: file handle to board
*
* The temperature device has been closed.
*/
static int wdtpci_temp_release(struct inode *inode, struct file *file)
{
return 0;
}
#endif /* CONFIG_WDT_501_PCI */
/**
* notify_sys:
* @this: our notifier block
......@@ -455,14 +543,9 @@ static int wdtpci_release(struct inode *inode, struct file *file)
static int wdtpci_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
unsigned long flags;
if (code==SYS_DOWN || code==SYS_HALT) {
/* Turn the card off */
spin_lock_irqsave(&wdtpci_lock, flags);
inb_p(WDT_DC);
wdtpci_ctr_load(2,0);
spin_unlock_irqrestore(&wdtpci_lock, flags);
wdtpci_stop();
}
return NOTIFY_DONE;
}
......@@ -475,7 +558,6 @@ static int wdtpci_notify_sys(struct notifier_block *this, unsigned long code,
static struct file_operations wdtpci_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = wdtpci_read,
.write = wdtpci_write,
.ioctl = wdtpci_ioctl,
.open = wdtpci_open,
......@@ -489,12 +571,20 @@ static struct miscdevice wdtpci_miscdev = {
};
#ifdef CONFIG_WDT_501_PCI
static struct file_operations wdtpci_temp_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = wdtpci_temp_read,
.open = wdtpci_temp_open,
.release = wdtpci_temp_release,
};
static struct miscdevice temp_miscdev = {
.minor = TEMP_MINOR,
.name = "temperature",
.fops = &wdtpci_fops,
.fops = &wdtpci_temp_fops,
};
#endif
#endif /* CONFIG_WDT_501_PCI */
/*
* The WDT card needs to learn about soft shutdowns in order to
......@@ -509,71 +599,96 @@ static struct notifier_block wdtpci_notifier = {
static int __devinit wdtpci_init_one (struct pci_dev *dev,
const struct pci_device_id *ent)
{
static int dev_count = 0;
int ret = -EIO;
dev_count++;
if (dev_count > 1) {
printk (KERN_ERR PFX
"this driver only supports 1 device\n");
printk (KERN_ERR PFX "this driver only supports 1 device\n");
return -ENODEV;
}
if (pci_enable_device (dev))
goto out;
if (pci_enable_device (dev)) {
printk (KERN_ERR PFX "Not possible to enable PCI Device\n");
return -ENODEV;
}
if (pci_resource_start (dev, 2) == 0x0000) {
printk (KERN_ERR PFX "No I/O-Address for card detected\n");
ret = -ENODEV;
goto out_pci;
}
sema_init(&open_sem, 1);
spin_lock_init(&wdtpci_lock);
irq = dev->irq;
io = pci_resource_start (dev, 2);
printk ("WDT501-P(PCI-WDG-CSM) driver 0.07 at %X "
"(Interrupt %d)\n", io, irq);
if (request_region (io, 16, "wdt-pci") == NULL) {
printk (KERN_ERR PFX "I/O %d is not free.\n", io);
goto out;
if (request_region (io, 16, "wdt_pci") == NULL) {
printk (KERN_ERR PFX "I/O address 0x%04x already in use\n", io);
goto out_pci;
}
if (request_irq (irq, wdtpci_interrupt, SA_INTERRUPT | SA_SHIRQ,
"wdt-pci", &wdtpci_miscdev)) {
printk (KERN_ERR PFX "IRQ %d is not free.\n", irq);
"wdt_pci", &wdtpci_miscdev)) {
printk (KERN_ERR PFX "IRQ %d is not free\n", irq);
goto out_reg;
}
ret = misc_register (&wdtpci_miscdev);
if (ret) {
printk (KERN_ERR PFX "can't misc_register on minor=%d\n", WATCHDOG_MINOR);
goto out_irq;
printk ("PCI-WDT500/501 (PCI-WDG-CSM) driver 0.10 at 0x%04x (Interrupt %d)\n",
io, irq);
/* Check that the heartbeat value is within it's range ; if not reset to the default */
if (wdtpci_set_heartbeat(heartbeat)) {
wdtpci_set_heartbeat(WD_TIMO);
printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
WD_TIMO);
}
ret = register_reboot_notifier (&wdtpci_notifier);
if (ret) {
printk (KERN_ERR PFX "can't misc_register on minor=%d\n", WATCHDOG_MINOR);
goto out_misc;
printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
goto out_irq;
}
#ifdef CONFIG_WDT_501_PCI
ret = misc_register (&temp_miscdev);
if (ret) {
printk (KERN_ERR PFX "can't misc_register (temp) on minor=%d\n", TEMP_MINOR);
printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
TEMP_MINOR, ret);
goto out_rbt;
}
#endif
#endif /* CONFIG_WDT_501_PCI */
ret = misc_register (&wdtpci_miscdev);
if (ret) {
printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
goto out_misc;
}
printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
heartbeat, nowayout);
#ifdef CONFIG_WDT_501_PCI
printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
#endif /* CONFIG_WDT_501_PCI */
ret = 0;
out:
return ret;
out_misc:
#ifdef CONFIG_WDT_501_PCI
misc_deregister(&temp_miscdev);
#endif /* CONFIG_WDT_501_PCI */
out_rbt:
unregister_reboot_notifier(&wdtpci_notifier);
#endif
out_misc:
misc_deregister(&wdtpci_miscdev);
out_irq:
free_irq(irq, &wdtpci_miscdev);
out_reg:
release_region (io, 16);
out_pci:
pci_disable_device(dev);
goto out;
}
......@@ -582,13 +697,15 @@ static void __devexit wdtpci_remove_one (struct pci_dev *pdev)
{
/* here we assume only one device will ever have
* been picked up and registered by probe function */
unregister_reboot_notifier(&wdtpci_notifier);
misc_deregister(&wdtpci_miscdev);
#ifdef CONFIG_WDT_501_PCI
misc_deregister(&temp_miscdev);
#endif
misc_deregister(&wdtpci_miscdev);
#endif /* CONFIG_WDT_501_PCI */
unregister_reboot_notifier(&wdtpci_notifier);
free_irq(irq, &wdtpci_miscdev);
release_region(io, 16);
pci_disable_device(pdev);
dev_count--;
}
......@@ -605,7 +722,7 @@ MODULE_DEVICE_TABLE(pci, wdtpci_pci_tbl);
static struct pci_driver wdtpci_driver = {
.name = "wdt-pci",
.name = "wdt_pci",
.id_table = wdtpci_pci_tbl,
.probe = wdtpci_init_one,
.remove = __devexit_p(wdtpci_remove_one),
......@@ -619,7 +736,7 @@ static struct pci_driver wdtpci_driver = {
* 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.
* module in xx seconds or reboot.
*/
static void __exit wdtpci_cleanup(void)
......@@ -638,12 +755,7 @@ static void __exit wdtpci_cleanup(void)
static int __init wdtpci_init(void)
{
int rc = pci_register_driver (&wdtpci_driver);
if (rc < 1)
return -ENODEV;
return 0;
return pci_register_driver (&wdtpci_driver);
}
......@@ -651,7 +763,7 @@ module_init(wdtpci_init);
module_exit(wdtpci_cleanup);
MODULE_AUTHOR("JP Nollmann, Alan Cox");
MODULE_DESCRIPTION("Driver for the ICS PCI watchdog cards");
MODULE_DESCRIPTION("Driver for the ICS PCI-WDT500/501 watchdog cards");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
MODULE_ALIAS_MISCDEV(TEMP_MINOR);
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