/*
- * Industrial Computer Source WDT500/501 driver
+ * Industrial Computer Source WDT501 driver
*
- * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
+ * (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>,
+ * 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
* 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
+ * Tim Hockin : Added insmod parameters, comment
+ * cleanup, parameterized timeout
+ * Tigran Aivazian : Restructured wdt_init() to handle
+ * failures
* Joel Becker : Added WDIOC_GET/SETTIMEOUT
* Matt Domsch : Added nowayout module option
*/
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#include "wd501p.h"
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) ")");
+MODULE_PARM_DESC(heartbeat,
+ "Watchdog heartbeat in seconds. (0 < heartbeat < 65536, default="
+ __MODULE_STRING(WD_TIMO) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/* You must set these - there is no sane way to probe for this board. */
-static int io=0x240;
-static int irq=11;
+static int io = 0x240;
+static int irq = 11;
+
+static DEFINE_SPINLOCK(wdt_lock);
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 */
+MODULE_PARM_DESC(tachometer,
+ "WDT501-P Fan Tachometer support (0=disable, default=0)");
+
+static int type = 500;
+module_param(type, int, 0);
+MODULE_PARM_DESC(type,
+ "WDT501-P Card type (500 or 501 , default=500)");
/*
* Programming support
static void wdt_ctr_mode(int ctr, int mode)
{
- ctr<<=6;
- ctr|=0x30;
- ctr|=(mode<<1);
+ ctr <<= 6;
+ ctr |= 0x30;
+ ctr |= (mode << 1);
outb_p(ctr, WDT_CR);
}
static int wdt_start(void)
{
+ unsigned long flags;
+ spin_lock_irqsave(&wdt_lock, flags);
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_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 */
+ wdt_ctr_load(1, wd_heartbeat); /* Heartbeat */
+ wdt_ctr_load(2, 65535); /* Length of reset pulse */
outb_p(0, WDT_DC); /* Enable watchdog */
+ spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
}
* Stop the watchdog driver.
*/
-static int wdt_stop (void)
+static int wdt_stop(void)
{
+ unsigned long flags;
+ spin_lock_irqsave(&wdt_lock, flags);
/* Turn the card off */
inb_p(WDT_DC); /* Disable watchdog */
- wdt_ctr_load(2,0); /* 0 length reset pulses now */
+ wdt_ctr_load(2, 0); /* 0 length reset pulses now */
+ spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
}
/**
* wdt_ping:
*
- * Reload counter one with the watchdog heartbeat. We don't bother reloading
- * the cascade counter.
+ * Reload counter one with the watchdog heartbeat. We don't bother
+ * reloading the cascade counter.
*/
-static int wdt_ping(void)
+static void wdt_ping(void)
{
+ unsigned long flags;
+ spin_lock_irqsave(&wdt_lock, flags);
/* 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 */
+ 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;
+ spin_unlock_irqrestore(&wdt_lock, flags);
}
/**
* 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.
+ * Set a new heartbeat value for the watchdog device. If the heartbeat
+ * value is incorrect we keep the old value and return -EINVAL. If
+ * successful we return 0.
*/
+
static int wdt_set_heartbeat(int t)
{
- if ((t < 1) || (t > 65535))
+ if (t < 1 || t > 65535)
return -EINVAL;
heartbeat = 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
* 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=inb_p(WDT_SR);
+ 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:
*
* 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=inb_p(WDT_RT);
+ unsigned short c;
+ unsigned long flags;
- *temperature = (c * 11 / 15) + 7;
- return 0;
+ spin_lock_irqsave(&wdt_lock, flags);
+ c = inb_p(WDT_RT);
+ spin_unlock_irqrestore(&wdt_lock, flags);
+ 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:
* Read the status register see what is up and
* then printk it.
*/
- unsigned char status=inb_p(WDT_SR);
+ unsigned char status;
+
+ spin_lock(&wdt_lock);
+ status = inb_p(WDT_SR);
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))
+ if (!(status & WDC_SR_WCCR)) {
#ifdef SOFTWARE_REBOOT
#ifdef ONLY_TESTING
printk(KERN_CRIT "Would Reboot.\n");
#else
printk(KERN_CRIT "Reset in 5ms.\n");
#endif
+ }
+ spin_unlock(&wdt_lock);
return IRQ_HANDLED;
}
* write of data will do, as we we don't define content meaning.
*/
-static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- if(count) {
+ if (count) {
if (!nowayout) {
size_t i;
/**
* wdt_ioctl:
- * @inode: inode of the device
* @file: file handle to the device
* @cmd: watchdog command
* @arg: argument pointer
* querying capabilities and current status.
*/
-static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
/* 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:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
-
- case WDIOC_GETSTATUS:
- wdt_get_status(&status);
- return put_user(status, p);
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- wdt_ping();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
+ 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:
+ status = wdt_get_status();
+ return put_user(status, p);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+ if (wdt_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+ wdt_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+ default:
+ return -ENOTTY;
}
}
static int wdt_open(struct inode *inode, struct file *file)
{
- if(test_and_set_bit(0, &wdt_is_open))
+ if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
/*
* Activate
wdt_stop();
clear_bit(0, &wdt_is_open);
} else {
- printk(KERN_CRIT "wdt: WDT device closed unexpectedly. WDT will not stop!\n");
+ printk(KERN_CRIT
+ "wdt: WDT device closed unexpectedly. WDT will not stop!\n");
wdt_ping();
}
expect_close = 0;
return 0;
}
-#ifdef CONFIG_WDT_501
/**
* wdt_temp_read:
* @file: file handle to the watchdog board
* farenheit. It was designed by an imperial measurement luddite.
*/
-static ssize_t wdt_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
+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))
+ if (copy_to_user(buf, &temperature, 1))
return -EFAULT;
return 1;
{
return 0;
}
-#endif /* CONFIG_WDT_501 */
/**
* notify_sys:
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 */
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt_stop();
- }
return NOTIFY_DONE;
}
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdt_write,
- .ioctl = wdt_ioctl,
+ .unlocked_ioctl = wdt_ioctl,
.open = wdt_open,
.release = wdt_release,
};
.fops = &wdt_fops,
};
-#ifdef CONFIG_WDT_501
static const struct file_operations wdt_temp_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.name = "temperature",
.fops = &wdt_temp_fops,
};
-#endif /* CONFIG_WDT_501 */
/*
* The WDT card needs to learn about soft shutdowns in order to
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);
+ release_region(io, 8);
}
/**
{
int ret;
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ 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")) {
- printk(KERN_ERR "wdt: I/O address 0x%04x already in use\n", io);
+ printk(KERN_ERR
+ "wdt: I/O address 0x%04x already in use\n", io);
ret = -EBUSY;
goto out;
}
ret = request_irq(irq, wdt_interrupt, IRQF_DISABLED, "wdt501p", NULL);
- if(ret) {
+ if (ret) {
printk(KERN_ERR "wdt: IRQ %d is not free.\n", irq);
goto outreg;
}
ret = register_reboot_notifier(&wdt_notifier);
- if(ret) {
- printk(KERN_ERR "wdt: cannot register reboot notifier (err=%d)\n", ret);
+ if (ret) {
+ 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: 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) {
- printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, 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 0.10 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", (tachometer ? "Enabled" : "Disabled"));
-#endif /* CONFIG_WDT_501 */
-
-out:
- return ret;
+ if (type == 501)
+ printk(KERN_INFO "wdt: Fan Tachometer is %s\n",
+ (tachometer ? "Enabled" : "Disabled"));
+ 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;
+ release_region(io, 8);
+out:
+ return ret;
}
module_init(wdt_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff