X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fwatchdog%2Fwdt_pci.c;h=5d922fd6eafcddb60eb44ab948f56e86e28be82d;hb=cb55d282a0d2156e7d40ee81726ab16b569e96d7;hp=6baf4ae42c9d0e831cfa87e4470c72a7b2b15a4d;hpb=4800be295c34268fd3211d49828bfaa6bf62867f;p=linux-2.6 diff --git a/drivers/watchdog/wdt_pci.c b/drivers/watchdog/wdt_pci.c index 6baf4ae42c..5d922fd6ea 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 */ @@ -42,14 +44,15 @@ #include #include #include +#include #include #include #include #include #include +#include +#include -#include -#include #include #define WDT_IS_PCI @@ -73,8 +76,8 @@ /* 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 unsigned long open_lock; +static DEFINE_SPINLOCK(wdtpci_lock); static char expect_close; static int io; @@ -86,18 +89,23 @@ 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>8, WDT_COUNT0+ctr); + outb(val & 0xFF, WDT_COUNT0 + ctr); + udelay(8); + outb(val >> 8, WDT_COUNT0 + ctr); + udelay(8); } /** @@ -134,23 +145,35 @@ 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 +185,15 @@ 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 +201,23 @@ 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 +226,14 @@ 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 +254,14 @@ 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 +291,12 @@ 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; } @@ -282,23 +318,31 @@ 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"); } #endif /* CONFIG_WDT_501_PCI */ - if (!(status&WDC_SR_WCCR)) + if (!(status&WDC_SR_WCCR)) { #ifdef SOFTWARE_REBOOT #ifdef ONLY_TESTING printk(KERN_CRIT PFX "Would Reboot.\n"); @@ -309,6 +353,8 @@ static irqreturn_t wdtpci_interrupt(int irq, void *dev_id) #else printk(KERN_CRIT PFX "Reset in 5ms.\n"); #endif + } + spin_unlock(&wdtpci_lock); return IRQ_HANDLED; } @@ -324,7 +370,8 @@ 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) { @@ -334,7 +381,7 @@ 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; @@ -342,13 +389,11 @@ 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 @@ -358,8 +403,8 @@ 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; @@ -382,33 +427,29 @@ 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); + } } /** @@ -425,12 +466,11 @@ 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 */ @@ -459,7 +499,7 @@ 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; } @@ -475,14 +515,15 @@ 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; @@ -528,12 +569,10 @@ 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; } @@ -546,7 +585,7 @@ 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, }; @@ -583,81 +622,85 @@ 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); - spin_lock_init(&wdtpci_lock); - 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