diff options
Diffstat (limited to 'drivers/watchdog/iTCO_wdt.c')
| -rw-r--r-- | drivers/watchdog/iTCO_wdt.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c index 8da88603537..69de8713b8e 100644 --- a/drivers/watchdog/iTCO_wdt.c +++ b/drivers/watchdog/iTCO_wdt.c @@ -40,7 +40,7 @@ /* Module and version information */ #define DRV_NAME "iTCO_wdt" -#define DRV_VERSION "1.05" +#define DRV_VERSION "1.06" #define PFX DRV_NAME ": " /* Includes */ @@ -391,8 +391,8 @@ static struct platform_device *iTCO_wdt_platform_device; #define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */ static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */ module_param(heartbeat, int, 0); -MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. " - "(2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=" +MODULE_PARM_DESC(heartbeat, "Watchdog timeout in seconds. " + "5..76 (TCO v1) or 3..614 (TCO v2), default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); static int nowayout = WATCHDOG_NOWAYOUT; @@ -523,8 +523,13 @@ static int iTCO_wdt_keepalive(void) /* Reload the timer by writing to the TCO Timer Counter register */ if (iTCO_wdt_private.iTCO_version == 2) outw(0x01, TCO_RLD); - else if (iTCO_wdt_private.iTCO_version == 1) + else if (iTCO_wdt_private.iTCO_version == 1) { + /* Reset the timeout status bit so that the timer + * needs to count down twice again before rebooting */ + outw(0x0008, TCO1_STS); /* write 1 to clear bit */ + outb(0x01, TCO_RLD); + } spin_unlock(&iTCO_wdt_private.io_lock); return 0; @@ -537,6 +542,11 @@ static int iTCO_wdt_set_heartbeat(int t) unsigned int tmrval; tmrval = seconds_to_ticks(t); + + /* For TCO v1 the timer counts down twice before rebooting */ + if (iTCO_wdt_private.iTCO_version == 1) + tmrval /= 2; + /* from the specs: */ /* "Values of 0h-3h are ignored and should not be attempted" */ if (tmrval < 0x04) @@ -593,6 +603,8 @@ static int iTCO_wdt_get_timeleft(int *time_left) spin_lock(&iTCO_wdt_private.io_lock); val8 = inb(TCO_RLD); val8 &= 0x3f; + if (!(inw(TCO1_STS) & 0x0008)) + val8 += (inb(TCOv1_TMR) & 0x3f); spin_unlock(&iTCO_wdt_private.io_lock); *time_left = (val8 * 6) / 10; @@ -832,9 +844,9 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev, TCOBASE); /* Clear out the (probably old) status */ - outb(8, TCO1_STS); /* Clear the Time Out Status bit */ - outb(2, TCO2_STS); /* Clear SECOND_TO_STS bit */ - outb(4, TCO2_STS); /* Clear BOOT_STS bit */ + outw(0x0008, TCO1_STS); /* Clear the Time Out Status bit */ + outw(0x0002, TCO2_STS); /* Clear SECOND_TO_STS bit */ + outw(0x0004, TCO2_STS); /* Clear BOOT_STS bit */ /* Make sure the watchdog is not running */ iTCO_wdt_stop(); @@ -844,8 +856,7 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev, if (iTCO_wdt_set_heartbeat(heartbeat)) { iTCO_wdt_set_heartbeat(WATCHDOG_HEARTBEAT); printk(KERN_INFO PFX - "heartbeat value must be 2 < heartbeat < 39 (TCO v1) " - "or 613 (TCO v2), using %d\n", heartbeat); + "timeout value out of range, using %d\n", heartbeat); } ret = misc_register(&iTCO_wdt_miscdev); |