diff options
-rw-r--r-- | drivers/watchdog/wdt.c | 176 | ||||
-rw-r--r-- | drivers/watchdog/wdt_pci.c | 300 |
2 files changed, 265 insertions, 211 deletions
diff --git a/drivers/watchdog/wdt.c b/drivers/watchdog/wdt.c index 756fb15fdce7..53a6b18bcb9a 100644 --- a/drivers/watchdog/wdt.c +++ b/drivers/watchdog/wdt.c @@ -24,9 +24,10 @@ * 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 */ @@ -42,9 +43,9 @@ #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" @@ -60,15 +61,19 @@ static char expect_close; 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); @@ -82,7 +87,8 @@ MODULE_PARM_DESC(irq, "WDT irq (default=11)"); static int tachometer; module_param(tachometer, int, 0); -MODULE_PARM_DESC(tachometer, "WDT501-P Fan Tachometer support (0=disable, default=0)"); +MODULE_PARM_DESC(tachometer, + "WDT501-P Fan Tachometer support (0=disable, default=0)"); #endif /* CONFIG_WDT_501 */ /* @@ -91,9 +97,9 @@ MODULE_PARM_DESC(tachometer, "WDT501-P Fan Tachometer support (0=disable, defaul 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); } @@ -114,12 +120,15 @@ 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; @@ -131,13 +140,13 @@ static int wdt_start(void) * 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; } @@ -145,8 +154,8 @@ static int wdt_stop (void) /** * 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) @@ -155,8 +164,9 @@ static int wdt_ping(void) 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 */ spin_unlock_irqrestore(&wdt_lock, flags); return 0; @@ -166,13 +176,14 @@ static int wdt_ping(void) * 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; @@ -200,7 +211,7 @@ static int wdt_get_status(int *status) new_status = inb_p(WDT_SR); spin_unlock_irqrestore(&wdt_lock, flags); - *status=0; + *status = 0; if (new_status & WDC_SR_ISOI0) *status |= WDIOF_EXTERN1; if (new_status & WDC_SR_ISII1) @@ -266,7 +277,7 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id) #ifdef CONFIG_WDT_501 if (!(status & WDC_SR_TGOOD)) - printk(KERN_CRIT "Overheat alarm.(%d)\n",inb_p(WDT_RT)); + 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)) @@ -304,9 +315,10 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id) * 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; @@ -328,7 +340,6 @@ static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count /** * wdt_ioctl: - * @inode: inode of the device * @file: file handle to the device * @cmd: watchdog command * @arg: argument pointer @@ -338,8 +349,7 @@ static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count * 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; @@ -362,32 +372,28 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, 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); + 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); } } @@ -405,7 +411,7 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, 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 @@ -432,7 +438,8 @@ static int wdt_release(struct inode *inode, struct file *file) 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; @@ -451,14 +458,15 @@ static int wdt_release(struct inode *inode, struct file *file) * 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; - if (copy_to_user (buf, &temperature, 1)) + if (copy_to_user(buf, &temperature, 1)) return -EFAULT; return 1; @@ -506,10 +514,8 @@ static int wdt_temp_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) { - /* Turn the card off */ + if (code == SYS_DOWN || code == SYS_HALT) wdt_stop(); - } return NOTIFY_DONE; } @@ -522,7 +528,7 @@ static const struct file_operations wdt_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .write = wdt_write, - .ioctl = wdt_ioctl, + .unlocked_ioctl = wdt_ioctl, .open = wdt_open, .release = wdt_release, }; @@ -576,7 +582,7 @@ static void __exit wdt_exit(void) #endif /* CONFIG_WDT_501 */ unregister_reboot_notifier(&wdt_notifier); free_irq(irq, NULL); - release_region(io,8); + release_region(io, 8); } /** @@ -591,44 +597,49 @@ static int __init wdt_init(void) { int ret; - /* Check that the heartbeat value is within it's range ; if not reset to the default */ + /* 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", + 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); + 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; } @@ -636,7 +647,8 @@ static int __init wdt_init(void) 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")); + printk(KERN_INFO "wdt: Fan Tachometer is %s\n", + (tachometer ? "Enabled" : "Disabled")); #endif /* CONFIG_WDT_501 */ out: @@ -651,7 +663,7 @@ outrbt: outirq: free_irq(irq, NULL); outreg: - release_region(io,8); + release_region(io, 8); goto out; } diff --git a/drivers/watchdog/wdt_pci.c b/drivers/watchdog/wdt_pci.c index 1355608683e4..078f37f80383 100644 --- a/drivers/watchdog/wdt_pci.c +++ b/drivers/watchdog/wdt_pci.c @@ -29,9 +29,11 @@ * JP Nollmann : Added support for PCI wdt501p * Alan Cox : Split ISA and PCI cards into two drivers * Jeff Garzik : PCI cleanups - * Tigran Aivazian : Restructured wdtpci_init_one() to handle failures + * Tigran Aivazian : Restructured wdtpci_init_one() to handle + * failures * Joel Becker : Added WDIOC_GET/SETTIMEOUT - * Zwane Mwaikambo : Magic char closing, locking changes, cleanups + * Zwane Mwaikambo : Magic char closing, locking changes, + * cleanups * Matt Domsch : nowayout module option */ @@ -47,9 +49,9 @@ #include <linux/init.h> #include <linux/fs.h> #include <linux/pci.h> +#include <linux/io.h> +#include <linux/uaccess.h> -#include <asm/io.h> -#include <asm/uaccess.h> #include <asm/system.h> #define WDT_IS_PCI @@ -73,7 +75,7 @@ /* We can only use 1 card due to the /dev/watchdog restriction */ static int dev_count; -static struct semaphore open_sem; +static unsigned long open_lock; static DEFINE_SPINLOCK(wdtpci_lock); static char expect_close; @@ -86,18 +88,23 @@ static int irq; 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) ")"); #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)"); +MODULE_PARM_DESC(tachometer, + "PCI-WDT501 Fan Tachometer support (0=disable, default=0)"); #endif /* CONFIG_WDT_501_PCI */ /* @@ -106,16 +113,19 @@ MODULE_PARM_DESC(tachometer, "PCI-WDT501 Fan Tachometer support (0=disable, defa static void wdtpci_ctr_mode(int ctr, int mode) { - ctr<<=6; - ctr|=0x30; - ctr|=(mode<<1); - outb_p(ctr, WDT_CR); + ctr <<= 6; + ctr |= 0x30; + ctr |= (mode << 1); + outb(ctr, WDT_CR); + udelay(8); } static void wdtpci_ctr_load(int ctr, int val) { - outb_p(val&0xFF, WDT_COUNT0+ctr); - outb_p(val>>8, WDT_COUNT0+ctr); + outb(val & 0xFF, WDT_COUNT0 + ctr); + udelay(8); + outb(val >> 8, WDT_COUNT0 + ctr); + udelay(8); } /** @@ -134,23 +144,35 @@ static int wdtpci_start(void) * "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 */ + inb(WDT_DC); /* Disable watchdog */ + udelay(8); + wdtpci_ctr_mode(2, 0); /* Program CTR2 for Mode 0: + Pulse on Terminal Count */ + outb(0, WDT_DC); /* Enable watchdog */ + udelay(8); + inb(WDT_DC); /* Disable watchdog */ + udelay(8); + outb(0, WDT_CLOCK); /* 2.0833MHz clock */ + udelay(8); + inb(WDT_BUZZER); /* disable */ + udelay(8); + inb(WDT_OPTONOTRST); /* disable */ + udelay(8); + inb(WDT_OPTORST); /* disable */ + udelay(8); + inb(WDT_PROGOUT); /* disable */ + udelay(8); + 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 */ + outb(0, WDT_DC); /* Enable watchdog */ + udelay(8); spin_unlock_irqrestore(&wdtpci_lock, flags); return 0; @@ -162,14 +184,15 @@ static int wdtpci_start(void) * Stop the watchdog driver. */ -static int wdtpci_stop (void) +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 */ + inb(WDT_DC); /* Disable watchdog */ + udelay(8); + wdtpci_ctr_load(2, 0); /* 0 length reset pulses now */ spin_unlock_irqrestore(&wdtpci_lock, flags); return 0; } @@ -177,20 +200,23 @@ static int wdtpci_stop (void) /** * wdtpci_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 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 */ + /* Write a watchdog value */ + inb(WDT_DC); /* Disable watchdog */ + udelay(8); + wdtpci_ctr_mode(1, 2); /* Re-Program CTR1 for Mode 2: + Rate Generator */ + wdtpci_ctr_load(1, wd_heartbeat);/* Heartbeat */ + outb(0, WDT_DC); /* Enable watchdog */ + udelay(8); spin_unlock_irqrestore(&wdtpci_lock, flags); return 0; } @@ -199,14 +225,14 @@ static int wdtpci_ping(void) * 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. + * 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 wdtpci_set_heartbeat(int t) { /* Arbitrary, can't find the card's limits */ - if ((t < 1) || (t > 65535)) + if (t < 1 || t > 65535) return -EINVAL; heartbeat = t; @@ -227,9 +253,14 @@ static int wdtpci_set_heartbeat(int t) static int wdtpci_get_status(int *status) { - unsigned char new_status=inb_p(WDT_SR); + unsigned char new_status; + unsigned long flags; + + spin_lock_irqsave(&wdtpci_lock, flags); + new_status = inb(WDT_SR); + spin_unlock_irqrestore(&wdtpci_lock, flags); - *status=0; + *status = 0; if (new_status & WDC_SR_ISOI0) *status |= WDIOF_EXTERN1; if (new_status & WDC_SR_ISII1) @@ -259,8 +290,12 @@ static int wdtpci_get_status(int *status) static int wdtpci_get_temperature(int *temperature) { - unsigned short c=inb_p(WDT_RT); - + unsigned short c; + unsigned long flags; + spin_lock_irqsave(&wdtpci_lock, flags); + c = inb(WDT_RT); + udelay(8); + spin_unlock_irqrestore(&wdtpci_lock, flags); *temperature = (c * 11 / 15) + 7; return 0; } @@ -282,17 +317,25 @@ static irqreturn_t wdtpci_interrupt(int irq, void *dev_id) * Read the status register see what is up and * then printk it. */ - unsigned char status=inb_p(WDT_SR); + unsigned char status; + + spin_lock(&wdtpci_lock); + + status = inb(WDT_SR); + udelay(8); printk(KERN_CRIT PFX "status %d\n", status); #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_TGOOD)) { + u8 alarm = inb(WDT_RT); + printk(KERN_CRIT PFX "Overheat alarm.(%d)\n", alarm); + udelay(8); + } if (!(status & WDC_SR_PSUOVER)) - printk(KERN_CRIT PFX "PSU over voltage.\n"); + printk(KERN_CRIT PFX "PSU over voltage.\n"); if (!(status & WDC_SR_PSUUNDR)) - printk(KERN_CRIT PFX "PSU under voltage.\n"); + printk(KERN_CRIT PFX "PSU under voltage.\n"); if (tachometer) { if (!(status & WDC_SR_FANGOOD)) printk(KERN_CRIT PFX "Possible fan fault.\n"); @@ -310,6 +353,7 @@ static irqreturn_t wdtpci_interrupt(int irq, void *dev_id) printk(KERN_CRIT PFX "Reset in 5ms.\n"); #endif } + spin_unlock(&wdtpci_lock); return IRQ_HANDLED; } @@ -325,7 +369,8 @@ static irqreturn_t wdtpci_interrupt(int irq, void *dev_id) * write of data will do, as we we don't define content meaning. */ -static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) +static ssize_t wdtpci_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) { if (count) { if (!nowayout) { @@ -335,7 +380,7 @@ static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t co for (i = 0; i != count; i++) { char c; - if(get_user(c, buf+i)) + if (get_user(c, buf+i)) return -EFAULT; if (c == 'V') expect_close = 42; @@ -343,13 +388,11 @@ static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t co } wdtpci_ping(); } - return count; } /** * wdtpci_ioctl: - * @inode: inode of the device * @file: file handle to the device * @cmd: watchdog command * @arg: argument pointer @@ -359,8 +402,8 @@ static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t co * querying capabilities and current status. */ -static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd, - unsigned long arg) +static long wdtpci_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) { int new_heartbeat; int status; @@ -383,33 +426,29 @@ static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd ident.options |= WDIOF_FANFAULT; #endif /* CONFIG_WDT_501_PCI */ - switch(cmd) - { - default: - return -ENOTTY; - case WDIOC_GETSUPPORT: - return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0; - - case WDIOC_GETSTATUS: - wdtpci_get_status(&status); - return put_user(status, p); - case WDIOC_GETBOOTSTATUS: - return put_user(0, p); - case WDIOC_KEEPALIVE: - wdtpci_ping(); - return 0; - case WDIOC_SETTIMEOUT: - if (get_user(new_heartbeat, p)) - return -EFAULT; - - if (wdtpci_set_heartbeat(new_heartbeat)) - return -EINVAL; - - wdtpci_ping(); - /* Fall */ - case WDIOC_GETTIMEOUT: - return put_user(heartbeat, p); - } + switch (cmd) { + default: + return -ENOTTY; + case WDIOC_GETSUPPORT: + return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; + case WDIOC_GETSTATUS: + wdtpci_get_status(&status); + return put_user(status, p); + case WDIOC_GETBOOTSTATUS: + return put_user(0, p); + case WDIOC_KEEPALIVE: + wdtpci_ping(); + return 0; + case WDIOC_SETTIMEOUT: + if (get_user(new_heartbeat, p)) + return -EFAULT; + if (wdtpci_set_heartbeat(new_heartbeat)) + return -EINVAL; + wdtpci_ping(); + /* Fall */ + case WDIOC_GETTIMEOUT: + return put_user(heartbeat, p); + } } /** @@ -426,12 +465,11 @@ static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd static int wdtpci_open(struct inode *inode, struct file *file) { - if (down_trylock(&open_sem)) + if (test_and_set_bit(0, &open_lock)) return -EBUSY; - if (nowayout) { + if (nowayout) __module_get(THIS_MODULE); - } /* * Activate */ @@ -460,7 +498,7 @@ static int wdtpci_release(struct inode *inode, struct file *file) wdtpci_ping(); } expect_close = 0; - up(&open_sem); + clear_bit(0, &open_lock); return 0; } @@ -476,14 +514,15 @@ static int wdtpci_release(struct inode *inode, struct file *file) * fahrenheit. It was designed by an imperial measurement luddite. */ -static ssize_t wdtpci_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr) +static ssize_t wdtpci_temp_read(struct file *file, char __user *buf, + size_t count, loff_t *ptr) { int temperature; if (wdtpci_get_temperature(&temperature)) return -EFAULT; - if (copy_to_user (buf, &temperature, 1)) + if (copy_to_user(buf, &temperature, 1)) return -EFAULT; return 1; @@ -529,12 +568,10 @@ static int wdtpci_temp_release(struct inode *inode, struct file *file) */ static int wdtpci_notify_sys(struct notifier_block *this, unsigned long code, - void *unused) + void *unused) { - if (code==SYS_DOWN || code==SYS_HALT) { - /* Turn the card off */ + if (code == SYS_DOWN || code == SYS_HALT) wdtpci_stop(); - } return NOTIFY_DONE; } @@ -547,7 +584,7 @@ static const struct file_operations wdtpci_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .write = wdtpci_write, - .ioctl = wdtpci_ioctl, + .unlocked_ioctl = wdtpci_ioctl, .open = wdtpci_open, .release = wdtpci_release, }; @@ -584,80 +621,85 @@ static struct notifier_block wdtpci_notifier = { }; -static int __devinit wdtpci_init_one (struct pci_dev *dev, - const struct pci_device_id *ent) +static int __devinit wdtpci_init_one(struct pci_dev *dev, + const struct pci_device_id *ent) { 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 one device\n"); return -ENODEV; } - if (pci_enable_device (dev)) { - printk (KERN_ERR PFX "Not possible to enable PCI Device\n"); + 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"); + 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); - irq = dev->irq; - io = pci_resource_start (dev, 2); + io = pci_resource_start(dev, 2); - if (request_region (io, 16, "wdt_pci") == NULL) { - printk (KERN_ERR PFX "I/O address 0x%04x already in use\n", io); + 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, IRQF_DISABLED | IRQF_SHARED, + if (request_irq(irq, wdtpci_interrupt, IRQF_DISABLED | IRQF_SHARED, "wdt_pci", &wdtpci_miscdev)) { - printk (KERN_ERR PFX "IRQ %d is not free\n", irq); + printk(KERN_ERR PFX "IRQ %d is not free\n", irq); goto out_reg; } - printk ("PCI-WDT500/501 (PCI-WDG-CSM) driver 0.10 at 0x%04x (Interrupt %d)\n", - io, irq); + printk(KERN_INFO + "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 */ + /* Check that the heartbeat value is within its 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); + printk(KERN_INFO PFX + "heartbeat value must be 0 < heartbeat < 65536, using %d\n", + WD_TIMO); } - ret = register_reboot_notifier (&wdtpci_notifier); + ret = register_reboot_notifier(&wdtpci_notifier); if (ret) { - printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret); + 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); + ret = misc_register(&temp_miscdev); if (ret) { - printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - TEMP_MINOR, ret); + printk(KERN_ERR PFX + "cannot register miscdev on minor=%d (err=%d)\n", + TEMP_MINOR, ret); goto out_rbt; } #endif /* CONFIG_WDT_501_PCI */ - ret = misc_register (&wdtpci_miscdev); + ret = misc_register(&wdtpci_miscdev); if (ret) { - printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - WATCHDOG_MINOR, 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")); + printk(KERN_INFO "wdt: Fan Tachometer is %s\n", + (tachometer ? "Enabled" : "Disabled")); #endif /* CONFIG_WDT_501_PCI */ ret = 0; @@ -673,14 +715,14 @@ out_rbt: out_irq: free_irq(irq, &wdtpci_miscdev); out_reg: - release_region (io, 16); + release_region(io, 16); out_pci: pci_disable_device(dev); goto out; } -static void __devexit wdtpci_remove_one (struct pci_dev *pdev) +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 */ @@ -728,7 +770,7 @@ static struct pci_driver wdtpci_driver = { static void __exit wdtpci_cleanup(void) { - pci_unregister_driver (&wdtpci_driver); + pci_unregister_driver(&wdtpci_driver); } @@ -742,7 +784,7 @@ static void __exit wdtpci_cleanup(void) static int __init wdtpci_init(void) { - return pci_register_driver (&wdtpci_driver); + return pci_register_driver(&wdtpci_driver); } |