diff options
Diffstat (limited to 'drivers/watchdog')
-rw-r--r-- | drivers/watchdog/Kconfig | 15 | ||||
-rw-r--r-- | drivers/watchdog/wdt.c | 152 |
2 files changed, 74 insertions, 93 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 325c10ff6a2c..55f64af072a4 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -940,21 +940,6 @@ config WDT To compile this driver as a module, choose M here: the module will be called wdt. -config WDT_501 - bool "WDT501 features" - depends on WDT - help - Saying Y here and creating a character special file /dev/temperature - with major number 10 and minor number 131 ("man mknod") will give - you a thermometer inside your computer: reading from - /dev/temperature yields one byte, the temperature in degrees - Fahrenheit. This works only if you have a WDT501P watchdog board - installed. - - If you want to enable the Fan Tachometer on the WDT501P, then you - can do this via the tachometer parameter. Only do this if you have a - fan tachometer actually set up. - # # PCI-based Watchdog Cards # 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); |