diff options
Diffstat (limited to 'drivers/watchdog/it87_wdt.c')
| -rw-r--r-- | drivers/watchdog/it87_wdt.c | 81 |
1 files changed, 58 insertions, 23 deletions
diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c index 455de77..dad2924 100644 --- a/drivers/watchdog/it87_wdt.c +++ b/drivers/watchdog/it87_wdt.c @@ -12,7 +12,7 @@ * http://www.ite.com.tw/ * * Support of the watchdog timers, which are available on - * IT8716, IT8718, IT8720, IT8726 and IT8712 (J,K version). + * IT8702, IT8712, IT8716, IT8718, IT8720 and IT8726. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -76,6 +76,7 @@ /* Chip Id numbers */ #define NO_DEV_ID 0xffff +#define IT8702_ID 0x8702 #define IT8705_ID 0x8705 #define IT8712_ID 0x8712 #define IT8716_ID 0x8716 @@ -133,7 +134,7 @@ #define WDTS_USE_GP 4 #define WDTS_EXPECTED 5 -static unsigned int base, gpact, ciract; +static unsigned int base, gpact, ciract, max_units; static unsigned long wdt_status; static DEFINE_SPINLOCK(spinlock); @@ -211,6 +212,33 @@ static inline void superio_outw(int val, int reg) outb(val, VAL); } +/* Internal function, should be called after superio_select(GPIO) */ +static void wdt_update_timeout(void) +{ + unsigned char cfg = WDT_KRST | WDT_PWROK; + int tm = timeout; + + if (testmode) + cfg = 0; + + if (tm <= max_units) + cfg |= WDT_TOV1; + else + tm /= 60; + + superio_outb(cfg, WDTCFG); + superio_outb(tm, WDTVALLSB); + if (max_units > 255) + superio_outb(tm>>8, WDTVALMSB); +} + +static int wdt_round_time(int t) +{ + t += 59; + t -= t % 60; + return t; +} + /* watchdog timer handling */ static void wdt_keepalive(void) @@ -235,12 +263,7 @@ static void wdt_start(void) superio_outb(WDT_GAMEPORT, WDTCTRL); else superio_outb(WDT_CIRINT, WDTCTRL); - if (!testmode) - superio_outb(WDT_TOV1 | WDT_KRST | WDT_PWROK, WDTCFG); - else - superio_outb(WDT_TOV1, WDTCFG); - superio_outb(timeout>>8, WDTVALMSB); - superio_outb(timeout, WDTVALLSB); + wdt_update_timeout(); superio_exit(); spin_unlock_irqrestore(&spinlock, flags); @@ -256,8 +279,9 @@ static void wdt_stop(void) superio_select(GPIO); superio_outb(0x00, WDTCTRL); superio_outb(WDT_TOV1, WDTCFG); - superio_outb(0x00, WDTVALMSB); superio_outb(0x00, WDTVALLSB); + if (max_units > 255) + superio_outb(0x00, WDTVALMSB); superio_exit(); spin_unlock_irqrestore(&spinlock, flags); @@ -267,8 +291,8 @@ static void wdt_stop(void) * wdt_set_timeout - set a new timeout value with watchdog ioctl * @t: timeout value in seconds * - * The hardware device has a 16 bit watchdog timer, thus the - * timeout time ranges between 1 and 65535 seconds. + * The hardware device has a 8 or 16 bit watchdog timer (depends on + * chip version) that can be configured to count seconds or minutes. * * Used within WDIOC_SETTIMEOUT watchdog device ioctl. */ @@ -277,19 +301,19 @@ static int wdt_set_timeout(int t) { unsigned long flags; - if (t < 1 || t > 65535) + if (t < 1 || t > max_units * 60) return -EINVAL; - timeout = t; + if (t > max_units) + timeout = wdt_round_time(t); + else + timeout = t; spin_lock_irqsave(&spinlock, flags); if (test_bit(WDTS_TIMER_RUN, &wdt_status)) { superio_enter(); - superio_select(GPIO); - superio_outb(t>>8, WDTVALMSB); - superio_outb(t, WDTVALLSB); - + wdt_update_timeout(); superio_exit(); } spin_unlock_irqrestore(&spinlock, flags); @@ -535,6 +559,8 @@ static int __init it87_wdt_init(void) u8 chip_rev; unsigned long flags; + wdt_status = 0; + spin_lock_irqsave(&spinlock, flags); superio_enter(); chip_type = superio_inw(CHIPID); @@ -543,16 +569,21 @@ static int __init it87_wdt_init(void) spin_unlock_irqrestore(&spinlock, flags); switch (chip_type) { + case IT8702_ID: + max_units = 255; + break; + case IT8712_ID: + max_units = (chip_rev < 8) ? 255 : 65535; + break; case IT8716_ID: case IT8726_ID: + max_units = 65535; break; case IT8718_ID: case IT8720_ID: + max_units = 65535; try_gameport = 0; break; - case IT8712_ID: - if (chip_rev > 7) - break; case IT8705_ID: printk(KERN_ERR PFX "Unsupported Chip found, Chip %04x Revision %02x\n", @@ -628,13 +659,16 @@ static int __init it87_wdt_init(void) spin_unlock_irqrestore(&spinlock, flags); } - if (timeout < 1 || timeout > 65535) { + if (timeout < 1 || timeout > max_units * 60) { timeout = DEFAULT_TIMEOUT; printk(KERN_WARNING PFX "Timeout value out of range, use default %d sec\n", DEFAULT_TIMEOUT); } + if (timeout > max_units) + timeout = wdt_round_time(timeout); + rc = register_reboot_notifier(&wdt_notifier); if (rc) { printk(KERN_ERR PFX @@ -661,7 +695,7 @@ static int __init it87_wdt_init(void) outb(0x09, CIR_IER(base)); } - printk(KERN_INFO PFX "Chip it%04x revision %d initialized. " + printk(KERN_INFO PFX "Chip IT%04x revision %d initialized. " "timeout=%d sec (nowayout=%d testmode=%d exclusive=%d " "nogameport=%d)\n", chip_type, chip_rev, timeout, nowayout, testmode, exclusive, nogameport); @@ -703,8 +737,9 @@ static void __exit it87_wdt_exit(void) superio_select(GPIO); superio_outb(0x00, WDTCTRL); superio_outb(0x00, WDTCFG); - superio_outb(0x00, WDTVALMSB); superio_outb(0x00, WDTVALLSB); + if (max_units > 255) + superio_outb(0x00, WDTVALMSB); if (test_bit(WDTS_USE_GP, &wdt_status)) { superio_select(GAMEPORT); superio_outb(gpact, ACTREG); |
