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Diffstat (limited to 'drivers/watchdog/wdt.c')
-rw-r--r--drivers/watchdog/wdt.c152
1 files changed, 74 insertions, 78 deletions
diff --git a/drivers/watchdog/wdt.c b/drivers/watchdog/wdt.c
index eddb9187e7b6..3bbefe9a2634 100644
--- a/drivers/watchdog/wdt.c
+++ b/drivers/watchdog/wdt.c
@@ -1,5 +1,5 @@
/*
- * Industrial Computer Source WDT500/501 driver
+ * Industrial Computer Source WDT501 driver
*
* (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>,
* All Rights Reserved.
@@ -82,14 +82,16 @@ 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 */
+
+static int type = 500;
+module_param(type, int, 0);
+MODULE_PARM_DESC(type,
+ "WDT501-P Card type (500 or 501 , default=500)");
/*
* Programming support
@@ -158,7 +160,7 @@ static int wdt_stop(void)
* reloading the cascade counter.
*/
-static int wdt_ping(void)
+static void wdt_ping(void)
{
unsigned long flags;
spin_lock_irqsave(&wdt_lock, flags);
@@ -169,7 +171,6 @@ static int wdt_ping(void)
wdt_ctr_load(1, wd_heartbeat); /* Heartbeat */
outb_p(0, WDT_DC); /* Enable watchdog */
spin_unlock_irqrestore(&wdt_lock, flags);
- return 0;
}
/**
@@ -193,7 +194,6 @@ static int wdt_set_heartbeat(int t)
/**
* 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
@@ -202,36 +202,35 @@ static int wdt_set_heartbeat(int t)
* we then map the bits onto the status ioctl flags.
*/
-static int wdt_get_status(int *status)
+static int wdt_get_status(void)
{
unsigned char new_status;
+ int status = 0;
unsigned long flags;
spin_lock_irqsave(&wdt_lock, flags);
new_status = inb_p(WDT_SR);
spin_unlock_irqrestore(&wdt_lock, flags);
- *status = 0;
if (new_status & WDC_SR_ISOI0)
- *status |= WDIOF_EXTERN1;
+ 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;
+ status |= WDIOF_EXTERN2;
+ if (type == 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;
+ return status;
}
-#ifdef CONFIG_WDT_501
/**
* wdt_get_temperature:
*
@@ -239,7 +238,7 @@ static int wdt_get_status(int *status)
* farenheit. It was designed by an imperial measurement luddite.
*/
-static int wdt_get_temperature(int *temperature)
+static int wdt_get_temperature(void)
{
unsigned short c;
unsigned long flags;
@@ -247,10 +246,18 @@ static int wdt_get_temperature(int *temperature)
spin_lock_irqsave(&wdt_lock, flags);
c = inb_p(WDT_RT);
spin_unlock_irqrestore(&wdt_lock, flags);
- *temperature = (c * 11 / 15) + 7;
- return 0;
+ return (c * 11 / 15) + 7;
+}
+
+static void wdt_decode_501(int 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");
}
-#endif /* CONFIG_WDT_501 */
/**
* wdt_interrupt:
@@ -275,18 +282,13 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id)
printk(KERN_CRIT "WDT status %d\n", status);
-#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))
- printk(KERN_CRIT "PSU over voltage.\n");
- if (!(status & WDC_SR_PSUUNDR))
- printk(KERN_CRIT "PSU under voltage.\n");
- if (tachometer) {
- if (!(status & WDC_SR_FANGOOD))
- printk(KERN_CRIT "Possible fan fault.\n");
+ if (type == 501) {
+ wdt_decode_501(status);
+ if (tachometer) {
+ if (!(status & WDC_SR_FANGOOD))
+ printk(KERN_CRIT "Possible fan fault.\n");
+ }
}
-#endif /* CONFIG_WDT_501 */
if (!(status & WDC_SR_WCCR)) {
#ifdef SOFTWARE_REBOOT
#ifdef ONLY_TESTING
@@ -366,17 +368,18 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
/* 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 */
+ if (type == 501) {
+ ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|
+ WDIOF_POWEROVER);
+ if (tachometer)
+ ident.options |= WDIOF_FANFAULT;
+ }
switch (cmd) {
case WDIOC_GETSUPPORT:
return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
- wdt_get_status(&status);
+ status = wdt_get_status();
return put_user(status, p);
case WDIOC_GETBOOTSTATUS:
return put_user(0, p);
@@ -446,7 +449,6 @@ static int wdt_release(struct inode *inode, struct file *file)
return 0;
}
-#ifdef CONFIG_WDT_501
/**
* wdt_temp_read:
* @file: file handle to the watchdog board
@@ -461,10 +463,7 @@ static int wdt_release(struct inode *inode, struct file *file)
static ssize_t wdt_temp_read(struct file *file, char __user *buf,
size_t count, loff_t *ptr)
{
- int temperature;
-
- if (wdt_get_temperature(&temperature))
- return -EFAULT;
+ int temperature = wdt_get_temperature();
if (copy_to_user(buf, &temperature, 1))
return -EFAULT;
@@ -497,7 +496,6 @@ static int wdt_temp_release(struct inode *inode, struct file *file)
{
return 0;
}
-#endif /* CONFIG_WDT_501 */
/**
* notify_sys:
@@ -539,7 +537,6 @@ static struct miscdevice wdt_miscdev = {
.fops = &wdt_fops,
};
-#ifdef CONFIG_WDT_501
static const struct file_operations wdt_temp_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -553,7 +550,6 @@ static struct miscdevice temp_miscdev = {
.name = "temperature",
.fops = &wdt_temp_fops,
};
-#endif /* CONFIG_WDT_501 */
/*
* The WDT card needs to learn about soft shutdowns in order to
@@ -577,9 +573,8 @@ static struct notifier_block wdt_notifier = {
static void __exit wdt_exit(void)
{
misc_deregister(&wdt_miscdev);
-#ifdef CONFIG_WDT_501
- misc_deregister(&temp_miscdev);
-#endif /* CONFIG_WDT_501 */
+ if (type == 501)
+ misc_deregister(&temp_miscdev);
unregister_reboot_notifier(&wdt_notifier);
free_irq(irq, NULL);
release_region(io, 8);
@@ -597,12 +592,17 @@ static int __init wdt_init(void)
{
int ret;
+ if (type != 500 && type != 501) {
+ printk(KERN_ERR "wdt: unknown card type '%d'.\n", type);
+ return -ENODEV;
+ }
+
/* 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);
+ printk(KERN_INFO "wdt: heartbeat value must be "
+ "0 < heartbeat < 65536, using %d\n", WD_TIMO);
}
if (!request_region(io, 8, "wdt501p")) {
@@ -625,15 +625,14 @@ static int __init wdt_init(void)
goto outirq;
}
-#ifdef CONFIG_WDT_501
- ret = misc_register(&temp_miscdev);
- if (ret) {
- printk(KERN_ERR
- "wdt: cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, ret);
- goto outrbt;
+ if (type == 501) {
+ ret = misc_register(&temp_miscdev);
+ if (ret) {
+ printk(KERN_ERR "wdt: cannot register miscdev "
+ "on minor=%d (err=%d)\n", TEMP_MINOR, ret);
+ goto outrbt;
+ }
}
-#endif /* CONFIG_WDT_501 */
ret = misc_register(&wdt_miscdev);
if (ret) {
@@ -643,28 +642,25 @@ static int __init wdt_init(void)
goto outmisc;
}
- ret = 0;
- printk(KERN_INFO "WDT500/501-P driver 0.10 at 0x%04x (Interrupt %d). heartbeat=%d sec (nowayout=%d)\n",
+ 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",
+ if (type == 501)
+ printk(KERN_INFO "wdt: Fan Tachometer is %s\n",
(tachometer ? "Enabled" : "Disabled"));
-#endif /* CONFIG_WDT_501 */
-
-out:
- return ret;
+ return 0;
outmisc:
-#ifdef CONFIG_WDT_501
- misc_deregister(&temp_miscdev);
+ if (type == 501)
+ misc_deregister(&temp_miscdev);
outrbt:
-#endif /* CONFIG_WDT_501 */
unregister_reboot_notifier(&wdt_notifier);
outirq:
free_irq(irq, NULL);
outreg:
release_region(io, 8);
- goto out;
+out:
+ return ret;
}
module_init(wdt_init);
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