diff options
Diffstat (limited to 'drivers/char/watchdog')
32 files changed, 761 insertions, 218 deletions
diff --git a/drivers/char/watchdog/Kconfig b/drivers/char/watchdog/Kconfig index 06a31da2381..b53e2e2b5ae 100644 --- a/drivers/char/watchdog/Kconfig +++ b/drivers/char/watchdog/Kconfig @@ -414,6 +414,16 @@ config WATCHDOG_RIO machines. The watchdog timeout period is normally one minute but can be changed with a boot-time parameter. +# ppc64 RTAS watchdog +config WATCHDOG_RTAS + tristate "RTAS watchdog" + depends on WATCHDOG && PPC_RTAS + help + This driver adds watchdog support for the RTAS watchdog. + + To compile this driver as a module, choose M here. The module + will be called wdrtas. + # # ISA-based Watchdog Cards # diff --git a/drivers/char/watchdog/Makefile b/drivers/char/watchdog/Makefile index 1cd27efa35c..c1838834ea7 100644 --- a/drivers/char/watchdog/Makefile +++ b/drivers/char/watchdog/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o obj-$(CONFIG_8xx_WDT) += mpc8xx_wdt.o +obj-$(CONFIG_WATCHDOG_RTAS) += wdrtas.o # Only one watchdog can succeed. We probe the hardware watchdog # drivers first, then the softdog driver. This means if your hardware diff --git a/drivers/char/watchdog/acquirewdt.c b/drivers/char/watchdog/acquirewdt.c index 8f302121741..7289f4af93d 100644 --- a/drivers/char/watchdog/acquirewdt.c +++ b/drivers/char/watchdog/acquirewdt.c @@ -82,12 +82,7 @@ static int wdt_start = 0x443; module_param(wdt_start, int, 0); MODULE_PARM_DESC(wdt_start, "Acquire WDT 'start' io port (default 0x443)"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/advantechwdt.c b/drivers/char/watchdog/advantechwdt.c index ea73c8379bd..194a3fd36b9 100644 --- a/drivers/char/watchdog/advantechwdt.c +++ b/drivers/char/watchdog/advantechwdt.c @@ -73,12 +73,7 @@ static int timeout = WATCHDOG_TIMEOUT; /* in seconds */ module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=63, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) "."); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/alim1535_wdt.c b/drivers/char/watchdog/alim1535_wdt.c index 35dcbf8be7d..8338ca300e2 100644 --- a/drivers/char/watchdog/alim1535_wdt.c +++ b/drivers/char/watchdog/alim1535_wdt.c @@ -38,12 +38,7 @@ static int timeout = WATCHDOG_TIMEOUT; module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (0<timeout<18000, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); @@ -317,7 +312,7 @@ static int ali_notify_sys(struct notifier_block *this, unsigned long code, void */ static struct pci_device_id ali_pci_tbl[] = { - { PCI_VENDOR_ID_AL, 1535, PCI_ANY_ID, PCI_ANY_ID,}, + { PCI_VENDOR_ID_AL, 0x1535, PCI_ANY_ID, PCI_ANY_ID,}, { 0, }, }; MODULE_DEVICE_TABLE(pci, ali_pci_tbl); diff --git a/drivers/char/watchdog/alim7101_wdt.c b/drivers/char/watchdog/alim7101_wdt.c index 90c091d9e0f..c05ac188a4d 100644 --- a/drivers/char/watchdog/alim7101_wdt.c +++ b/drivers/char/watchdog/alim7101_wdt.c @@ -75,12 +75,7 @@ static unsigned long wdt_is_open; static char wdt_expect_close; static struct pci_dev *alim7101_pmu; -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/eurotechwdt.c b/drivers/char/watchdog/eurotechwdt.c index d10e554a14d..25c2f257561 100644 --- a/drivers/char/watchdog/eurotechwdt.c +++ b/drivers/char/watchdog/eurotechwdt.c @@ -72,12 +72,7 @@ static char *ev = "int"; #define WDT_TIMEOUT 60 /* 1 minute */ -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); @@ -167,7 +162,7 @@ static irqreturn_t eurwdt_interrupt(int irq, void *dev_id, struct pt_regs *regs) printk(KERN_CRIT "Would Reboot.\n"); #else printk(KERN_CRIT "Initiating system reboot.\n"); - machine_restart(NULL); + emergency_restart(); #endif return IRQ_HANDLED; } diff --git a/drivers/char/watchdog/i8xx_tco.c b/drivers/char/watchdog/i8xx_tco.c index b14d642439e..f975dab1ddf 100644 --- a/drivers/char/watchdog/i8xx_tco.c +++ b/drivers/char/watchdog/i8xx_tco.c @@ -105,12 +105,7 @@ static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */ module_param(heartbeat, int, 0); MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<heartbeat<39, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); @@ -401,7 +396,7 @@ static unsigned char __init i8xx_tco_getdevice (void) */ while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { - if (pci_match_device(i8xx_tco_pci_tbl, dev)) { + if (pci_match_id(i8xx_tco_pci_tbl, dev)) { i8xx_tco_pci = dev; break; } diff --git a/drivers/char/watchdog/ib700wdt.c b/drivers/char/watchdog/ib700wdt.c index d974f16e84d..cf60329eec8 100644 --- a/drivers/char/watchdog/ib700wdt.c +++ b/drivers/char/watchdog/ib700wdt.c @@ -117,12 +117,7 @@ static int wd_times[] = { static int wd_margin = WD_TIMO; -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/indydog.c b/drivers/char/watchdog/indydog.c index 6af2c799b57..b4b94daba67 100644 --- a/drivers/char/watchdog/indydog.c +++ b/drivers/char/watchdog/indydog.c @@ -29,14 +29,9 @@ #define PFX "indydog: " static int indydog_alive; -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - #define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */ +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/ixp2000_wdt.c b/drivers/char/watchdog/ixp2000_wdt.c index ab659d37b4d..e7640bc4904 100644 --- a/drivers/char/watchdog/ixp2000_wdt.c +++ b/drivers/char/watchdog/ixp2000_wdt.c @@ -30,11 +30,7 @@ #include <asm/hardware.h> #include <asm/uaccess.h> -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif +static int nowayout = WATCHDOG_NOWAYOUT; static unsigned int heartbeat = 60; /* (secs) Default is 1 minute */ static unsigned long wdt_status; @@ -162,7 +158,7 @@ ixp2000_wdt_release(struct inode *inode, struct file *file) if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) { wdt_disable(); } else { - printk(KERN_CRIT "WATCHDOG: Device closed unexpectdly - " + printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - " "timer will not stop\n"); } @@ -192,7 +188,12 @@ static struct miscdevice ixp2000_wdt_miscdev = static int __init ixp2000_wdt_init(void) { - wdt_tick_rate = (*IXP2000_T1_CLD * HZ)/ 256;; + if ((*IXP2000_PRODUCT_ID & 0x001ffef0) == 0x00000000) { + printk(KERN_INFO "Unable to use IXP2000 watchdog due to IXP2800 erratum #25.\n"); + return -EIO; + } + + wdt_tick_rate = (*IXP2000_T1_CLD * HZ) / 256; return misc_register(&ixp2000_wdt_miscdev); } diff --git a/drivers/char/watchdog/ixp4xx_wdt.c b/drivers/char/watchdog/ixp4xx_wdt.c index 82396e06c8a..8d916afbf4f 100644 --- a/drivers/char/watchdog/ixp4xx_wdt.c +++ b/drivers/char/watchdog/ixp4xx_wdt.c @@ -27,11 +27,7 @@ #include <asm/hardware.h> #include <asm/uaccess.h> -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif +static int nowayout = WATCHDOG_NOWAYOUT; static int heartbeat = 60; /* (secs) Default is 1 minute */ static unsigned long wdt_status; static unsigned long boot_status; @@ -156,7 +152,7 @@ ixp4xx_wdt_release(struct inode *inode, struct file *file) if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) { wdt_disable(); } else { - printk(KERN_CRIT "WATCHDOG: Device closed unexpectdly - " + printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - " "timer will not stop\n"); } diff --git a/drivers/char/watchdog/machzwd.c b/drivers/char/watchdog/machzwd.c index 9da395fa779..a9a20aad61e 100644 --- a/drivers/char/watchdog/machzwd.c +++ b/drivers/char/watchdog/machzwd.c @@ -94,12 +94,7 @@ MODULE_DESCRIPTION("MachZ ZF-Logic Watchdog driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/mixcomwd.c b/drivers/char/watchdog/mixcomwd.c index 3143e4a0753..c9b301dccec 100644 --- a/drivers/char/watchdog/mixcomwd.c +++ b/drivers/char/watchdog/mixcomwd.c @@ -62,12 +62,7 @@ static int mixcomwd_timer_alive; static struct timer_list mixcomwd_timer = TIMER_INITIALIZER(NULL, 0, 0); static char expect_close; -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/pcwd.c b/drivers/char/watchdog/pcwd.c index 592dca10886..427ad51b7a3 100644 --- a/drivers/char/watchdog/pcwd.c +++ b/drivers/char/watchdog/pcwd.c @@ -146,12 +146,7 @@ static int heartbeat = WATCHDOG_HEARTBEAT; module_param(heartbeat, int, 0); MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<=heartbeat<=7200, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); @@ -344,7 +339,7 @@ static int pcwd_get_status(int *status) *status |= WDIOF_OVERHEAT; if (temp_panic) { printk (KERN_INFO PFX "Temperature overheat trip!\n"); - machine_power_off(); + kernel_power_off(); } } } else { @@ -355,7 +350,7 @@ static int pcwd_get_status(int *status) *status |= WDIOF_OVERHEAT; if (temp_panic) { printk (KERN_INFO PFX "Temperature overheat trip!\n"); - machine_power_off(); + kernel_power_off(); } } } diff --git a/drivers/char/watchdog/pcwd_pci.c b/drivers/char/watchdog/pcwd_pci.c index 8ce06662732..2b13afb09c5 100644 --- a/drivers/char/watchdog/pcwd_pci.c +++ b/drivers/char/watchdog/pcwd_pci.c @@ -103,12 +103,7 @@ static int heartbeat = WATCHDOG_HEARTBEAT; module_param(heartbeat, int, 0); MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/pcwd_usb.c b/drivers/char/watchdog/pcwd_usb.c index 1127201d73b..092e9b13375 100644 --- a/drivers/char/watchdog/pcwd_usb.c +++ b/drivers/char/watchdog/pcwd_usb.c @@ -79,12 +79,7 @@ static int heartbeat = WATCHDOG_HEARTBEAT; module_param(heartbeat, int, 0); MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/s3c2410_wdt.c b/drivers/char/watchdog/s3c2410_wdt.c index 1699d2c28ce..f85ac898a49 100644 --- a/drivers/char/watchdog/s3c2410_wdt.c +++ b/drivers/char/watchdog/s3c2410_wdt.c @@ -62,12 +62,7 @@ #define CONFIG_S3C2410_WATCHDOG_ATBOOT (0) #define CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME (15) -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; static int tmr_margin = CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME; static int tmr_atboot = CONFIG_S3C2410_WATCHDOG_ATBOOT; static int soft_noboot = 0; diff --git a/drivers/char/watchdog/sa1100_wdt.c b/drivers/char/watchdog/sa1100_wdt.c index 34e8f7b15e3..fb88b4041dc 100644 --- a/drivers/char/watchdog/sa1100_wdt.c +++ b/drivers/char/watchdog/sa1100_wdt.c @@ -36,17 +36,10 @@ #include <asm/uaccess.h> #define OSCR_FREQ CLOCK_TICK_RATE -#define SA1100_CLOSE_MAGIC (0x5afc4453) static unsigned long sa1100wdt_users; -static int expect_close; static int pre_margin; static int boot_status; -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif /* * Allow only one person to hold it open @@ -66,55 +59,33 @@ static int sa1100dog_open(struct inode *inode, struct file *file) } /* - * Shut off the timer. - * Lock it in if it's a module and we defined ...NOWAYOUT - * Oddly, the watchdog can only be enabled, but we can turn off - * the interrupt, which appears to prevent the watchdog timing out. + * The watchdog cannot be disabled. + * + * Previous comments suggested that turning off the interrupt by + * clearing OIER[E3] would prevent the watchdog timing out but this + * does not appear to be true (at least on the PXA255). */ static int sa1100dog_release(struct inode *inode, struct file *file) { - OSMR3 = OSCR + pre_margin; - - if (expect_close == SA1100_CLOSE_MAGIC) { - OIER &= ~OIER_E3; - } else { - printk(KERN_CRIT "WATCHDOG: WDT device closed unexpectedly. WDT will not stop!\n"); - } + printk(KERN_CRIT "WATCHDOG: Device closed - timer will not stop\n"); clear_bit(1, &sa1100wdt_users); - expect_close = 0; return 0; } static ssize_t sa1100dog_write(struct file *file, const char *data, size_t len, loff_t *ppos) { - if (len) { - if (!nowayout) { - size_t i; - - expect_close = 0; - - for (i = 0; i != len; i++) { - char c; - - if (get_user(c, data + i)) - return -EFAULT; - if (c == 'V') - expect_close = SA1100_CLOSE_MAGIC; - } - } + if (len) /* Refresh OSMR3 timer. */ OSMR3 = OSCR + pre_margin; - } return len; } static struct watchdog_info ident = { - .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE | - WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, - .identity = "SA1100 Watchdog", + .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, + .identity = "SA1100/PXA255 Watchdog", }; static int sa1100dog_ioctl(struct inode *inode, struct file *file, @@ -176,7 +147,7 @@ static struct file_operations sa1100dog_fops = static struct miscdevice sa1100dog_miscdev = { .minor = WATCHDOG_MINOR, - .name = "SA1100/PXA2xx watchdog", + .name = "watchdog", .fops = &sa1100dog_fops, }; @@ -198,7 +169,6 @@ static int __init sa1100dog_init(void) if (ret == 0) printk("SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n", margin); - return ret; } @@ -216,8 +186,5 @@ MODULE_DESCRIPTION("SA1100/PXA2xx Watchdog"); module_param(margin, int, 0); MODULE_PARM_DESC(margin, "Watchdog margin in seconds (default 60s)"); -module_param(nowayout, int, 0); -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started"); - MODULE_LICENSE("GPL"); MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); diff --git a/drivers/char/watchdog/sbc60xxwdt.c b/drivers/char/watchdog/sbc60xxwdt.c index d7de9880605..ed0bd55fbfc 100644 --- a/drivers/char/watchdog/sbc60xxwdt.c +++ b/drivers/char/watchdog/sbc60xxwdt.c @@ -98,12 +98,7 @@ static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ t module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/sc1200wdt.c b/drivers/char/watchdog/sc1200wdt.c index 24401e84729..515ce757204 100644 --- a/drivers/char/watchdog/sc1200wdt.c +++ b/drivers/char/watchdog/sc1200wdt.c @@ -91,12 +91,7 @@ MODULE_PARM_DESC(io, "io port"); module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "range is 0-255 minutes, default is 1"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/sc520_wdt.c b/drivers/char/watchdog/sc520_wdt.c index f6d143e1900..72501be79b0 100644 --- a/drivers/char/watchdog/sc520_wdt.c +++ b/drivers/char/watchdog/sc520_wdt.c @@ -94,12 +94,7 @@ static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ t module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/scx200_wdt.c b/drivers/char/watchdog/scx200_wdt.c index b569670e4ed..c4568569f3a 100644 --- a/drivers/char/watchdog/scx200_wdt.c +++ b/drivers/char/watchdog/scx200_wdt.c @@ -39,15 +39,11 @@ MODULE_DESCRIPTION("NatSemi SCx200 Watchdog Driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); -#ifndef CONFIG_WATCHDOG_NOWAYOUT -#define CONFIG_WATCHDOG_NOWAYOUT 0 -#endif - static int margin = 60; /* in seconds */ module_param(margin, int, 0); MODULE_PARM_DESC(margin, "Watchdog margin in seconds"); -static int nowayout = CONFIG_WATCHDOG_NOWAYOUT; +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close"); diff --git a/drivers/char/watchdog/shwdt.c b/drivers/char/watchdog/shwdt.c index 3bc9272a474..1f4cab55b2e 100644 --- a/drivers/char/watchdog/shwdt.c +++ b/drivers/char/watchdog/shwdt.c @@ -75,11 +75,7 @@ static unsigned long next_heartbeat; #define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */ static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */ -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif +static int nowayout = WATCHDOG_NOWAYOUT; /** * sh_wdt_start - Start the Watchdog diff --git a/drivers/char/watchdog/softdog.c b/drivers/char/watchdog/softdog.c index 117903498a0..4d7ed931f5c 100644 --- a/drivers/char/watchdog/softdog.c +++ b/drivers/char/watchdog/softdog.c @@ -56,12 +56,7 @@ static int soft_margin = TIMER_MARGIN; /* in seconds */ module_param(soft_margin, int, 0); MODULE_PARM_DESC(soft_margin, "Watchdog soft_margin in seconds. (0<soft_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); @@ -97,7 +92,7 @@ static void watchdog_fire(unsigned long data) else { printk(KERN_CRIT PFX "Initiating system reboot.\n"); - machine_restart(NULL); + emergency_restart(); printk(KERN_CRIT PFX "Reboot didn't ?????\n"); } } diff --git a/drivers/char/watchdog/w83627hf_wdt.c b/drivers/char/watchdog/w83627hf_wdt.c index 813c97038f8..465e0fd0423 100644 --- a/drivers/char/watchdog/w83627hf_wdt.c +++ b/drivers/char/watchdog/w83627hf_wdt.c @@ -54,12 +54,7 @@ static int timeout = WATCHDOG_TIMEOUT; /* in seconds */ module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=63, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) "."); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/w83877f_wdt.c b/drivers/char/watchdog/w83877f_wdt.c index bccbd4d6ac2..52a8bd0a598 100644 --- a/drivers/char/watchdog/w83877f_wdt.c +++ b/drivers/char/watchdog/w83877f_wdt.c @@ -85,12 +85,7 @@ module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/wafer5823wdt.c b/drivers/char/watchdog/wafer5823wdt.c index abb0bea45c0..7cf6c9bbf48 100644 --- a/drivers/char/watchdog/wafer5823wdt.c +++ b/drivers/char/watchdog/wafer5823wdt.c @@ -63,12 +63,7 @@ static int timeout = WD_TIMO; /* in seconds */ module_param(timeout, int, 0); MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WD_TIMO) "."); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/wdrtas.c b/drivers/char/watchdog/wdrtas.c new file mode 100644 index 00000000000..619e2ffca33 --- /dev/null +++ b/drivers/char/watchdog/wdrtas.c @@ -0,0 +1,696 @@ +/* + * FIXME: add wdrtas_get_status and wdrtas_get_boot_status as soon as + * RTAS calls are available + */ + +/* + * RTAS watchdog driver + * + * (C) Copyright IBM Corp. 2005 + * device driver to exploit watchdog RTAS functions + * + * Authors : Utz Bacher <utz.bacher@de.ibm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/config.h> +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/miscdevice.h> +#include <linux/module.h> +#include <linux/notifier.h> +#include <linux/reboot.h> +#include <linux/types.h> +#include <linux/watchdog.h> + +#include <asm/rtas.h> +#include <asm/uaccess.h> + +#define WDRTAS_MAGIC_CHAR 42 +#define WDRTAS_SUPPORTED_MASK (WDIOF_SETTIMEOUT | \ + WDIOF_MAGICCLOSE) + +MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>"); +MODULE_DESCRIPTION("RTAS watchdog driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); +MODULE_ALIAS_MISCDEV(TEMP_MINOR); + +#ifdef CONFIG_WATCHDOG_NOWAYOUT +static int wdrtas_nowayout = 1; +#else +static int wdrtas_nowayout = 0; +#endif + +static atomic_t wdrtas_miscdev_open = ATOMIC_INIT(0); +static char wdrtas_expect_close = 0; + +static int wdrtas_interval; + +#define WDRTAS_THERMAL_SENSOR 3 +static int wdrtas_token_get_sensor_state; +#define WDRTAS_SURVEILLANCE_IND 9000 +static int wdrtas_token_set_indicator; +#define WDRTAS_SP_SPI 28 +static int wdrtas_token_get_sp; +static int wdrtas_token_event_scan; + +#define WDRTAS_DEFAULT_INTERVAL 300 + +#define WDRTAS_LOGBUFFER_LEN 128 +static char wdrtas_logbuffer[WDRTAS_LOGBUFFER_LEN]; + + +/*** watchdog access functions */ + +/** + * wdrtas_set_interval - sets the watchdog interval + * @interval: new interval + * + * returns 0 on success, <0 on failures + * + * wdrtas_set_interval sets the watchdog keepalive interval by calling the + * RTAS function set-indicator (surveillance). The unit of interval is + * seconds. + */ +static int +wdrtas_set_interval(int interval) +{ + long result; + static int print_msg = 10; + + /* rtas uses minutes */ + interval = (interval + 59) / 60; + + result = rtas_call(wdrtas_token_set_indicator, 3, 1, NULL, + WDRTAS_SURVEILLANCE_IND, 0, interval); + if ( (result < 0) && (print_msg) ) { + printk(KERN_ERR "wdrtas: setting the watchdog to %i " + "timeout failed: %li\n", interval, result); + print_msg--; + } + + return result; +} + +/** + * wdrtas_get_interval - returns the current watchdog interval + * @fallback_value: value (in seconds) to use, if the RTAS call fails + * + * returns the interval + * + * wdrtas_get_interval returns the current watchdog keepalive interval + * as reported by the RTAS function ibm,get-system-parameter. The unit + * of the return value is seconds. + */ +static int +wdrtas_get_interval(int fallback_value) +{ + long result; + char value[4]; + + result = rtas_call(wdrtas_token_get_sp, 3, 1, NULL, + WDRTAS_SP_SPI, (void *)__pa(&value), 4); + if ( (value[0] != 0) || (value[1] != 2) || (value[3] != 0) || + (result < 0) ) { + printk(KERN_WARNING "wdrtas: could not get sp_spi watchdog " + "timeout (%li). Continuing\n", result); + return fallback_value; + } + + /* rtas uses minutes */ + return ((int)value[2]) * 60; +} + +/** + * wdrtas_timer_start - starts watchdog + * + * wdrtas_timer_start starts the watchdog by calling the RTAS function + * set-interval (surveillance) + */ +static void +wdrtas_timer_start(void) +{ + wdrtas_set_interval(wdrtas_interval); +} + +/** + * wdrtas_timer_stop - stops watchdog + * + * wdrtas_timer_stop stops the watchdog timer by calling the RTAS function + * set-interval (surveillance) + */ +static void +wdrtas_timer_stop(void) +{ + wdrtas_set_interval(0); +} + +/** + * wdrtas_log_scanned_event - logs an event we received during keepalive + * + * wdrtas_log_scanned_event prints a message to the log buffer dumping + * the results of the last event-scan call + */ +static void +wdrtas_log_scanned_event(void) +{ + int i; + + for (i = 0; i < WDRTAS_LOGBUFFER_LEN; i += 16) + printk(KERN_INFO "wdrtas: dumping event (line %i/%i), data = " + "%02x %02x %02x %02x %02x %02x %02x %02x " + "%02x %02x %02x %02x %02x %02x %02x %02x\n", + (i / 16) + 1, (WDRTAS_LOGBUFFER_LEN / 16), + wdrtas_logbuffer[i + 0], wdrtas_logbuffer[i + 1], + wdrtas_logbuffer[i + 2], wdrtas_logbuffer[i + 3], + wdrtas_logbuffer[i + 4], wdrtas_logbuffer[i + 5], + wdrtas_logbuffer[i + 6], wdrtas_logbuffer[i + 7], + wdrtas_logbuffer[i + 8], wdrtas_logbuffer[i + 9], + wdrtas_logbuffer[i + 10], wdrtas_logbuffer[i + 11], + wdrtas_logbuffer[i + 12], wdrtas_logbuffer[i + 13], + wdrtas_logbuffer[i + 14], wdrtas_logbuffer[i + 15]); +} + +/** + * wdrtas_timer_keepalive - resets watchdog timer to keep system alive + * + * wdrtas_timer_keepalive restarts the watchdog timer by calling the + * RTAS function event-scan and repeats these calls as long as there are + * events available. All events will be dumped. + */ +static void +wdrtas_timer_keepalive(void) +{ + long result; + + do { + result = rtas_call(wdrtas_token_event_scan, 4, 1, NULL, + RTAS_EVENT_SCAN_ALL_EVENTS, 0, + (void *)__pa(wdrtas_logbuffer), + WDRTAS_LOGBUFFER_LEN); + if (result < 0) + printk(KERN_ERR "wdrtas: event-scan failed: %li\n", + result); + if (result == 0) + wdrtas_log_scanned_event(); + } while (result == 0); +} + +/** + * wdrtas_get_temperature - returns current temperature + * + * returns temperature or <0 on failures + * + * wdrtas_get_temperature returns the current temperature in Fahrenheit. It + * uses the RTAS call get-sensor-state, token 3 to do so + */ +static int +wdrtas_get_temperature(void) +{ + long result; + int temperature = 0; + + result = rtas_call(wdrtas_token_get_sensor_state, 2, 2, + (void *)__pa(&temperature), + WDRTAS_THERMAL_SENSOR, 0); + + if (result < 0) + printk(KERN_WARNING "wdrtas: reading the thermal sensor " + "faild: %li\n", result); + else + temperature = ((temperature * 9) / 5) + 32; /* fahrenheit */ + + return temperature; +} + +/** + * wdrtas_get_status - returns the status of the watchdog + * + * returns a bitmask of defines WDIOF_... as defined in + * include/linux/watchdog.h + */ +static int +wdrtas_get_status(void) +{ + return 0; /* TODO */ +} + +/** + * wdrtas_get_boot_status - returns the reason for the last boot + * + * returns a bitmask of defines WDIOF_... as defined in + * include/linux/watchdog.h, indicating why the watchdog rebooted the system + */ +static int +wdrtas_get_boot_status(void) +{ + return 0; /* TODO */ +} + +/*** watchdog API and operations stuff */ + +/* wdrtas_write - called when watchdog device is written to + * @file: file structure + * @buf: user buffer with data + * @len: amount to data written + * @ppos: position in file + * + * returns the number of successfully processed characters, which is always + * the number of bytes passed to this function + * + * wdrtas_write processes all the data given to it and looks for the magic + * character 'V'. This character allows the watchdog device to be closed + * properly. + */ +static ssize_t +wdrtas_write(struct file *file, const char __user *buf, + size_t len, loff_t *ppos) +{ + int i; + char c; + + if (!len) + goto out; + + if (!wdrtas_nowayout) { + wdrtas_expect_close = 0; + /* look for 'V' */ + for (i = 0; i < len; i++) { + if (get_user(c, buf + i)) + return -EFAULT; + /* allow to close device */ + if (c == 'V') + wdrtas_expect_close = WDRTAS_MAGIC_CHAR; + } + } + + wdrtas_timer_keepalive(); + +out: + return len; +} + +/** + * wdrtas_ioctl - ioctl function for the watchdog device + * @inode: inode structure + * @file: file structure + * @cmd: command for ioctl + * @arg: argument pointer + * + * returns 0 on success, <0 on failure + * + * wdrtas_ioctl implements the watchdog API ioctls + */ +static int +wdrtas_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + int __user *argp = (void *)arg; + int i; + static struct watchdog_info wdinfo = { + .options = WDRTAS_SUPPORTED_MASK, + .firmware_version = 0, + .identity = "wdrtas" + }; + + switch (cmd) { + case WDIOC_GETSUPPORT: + if (copy_to_user(argp, &wdinfo, sizeof(wdinfo))) + return -EFAULT; + return 0; + + case WDIOC_GETSTATUS: + i = wdrtas_get_status(); + return put_user(i, argp); + + case WDIOC_GETBOOTSTATUS: + i = wdrtas_get_boot_status(); + return put_user(i, argp); + + case WDIOC_GETTEMP: + if (wdrtas_token_get_sensor_state == RTAS_UNKNOWN_SERVICE) + return -EOPNOTSUPP; + + i = wdrtas_get_temperature(); + return put_user(i, argp); + + case WDIOC_SETOPTIONS: + if (get_user(i, argp)) + return -EFAULT; + if (i & WDIOS_DISABLECARD) + wdrtas_timer_stop(); + if (i & WDIOS_ENABLECARD) { + wdrtas_timer_keepalive(); + wdrtas_timer_start(); + } + if (i & WDIOS_TEMPPANIC) { + /* not implemented. Done by H8 */ + } + return 0; + + case WDIOC_KEEPALIVE: + wdrtas_timer_keepalive(); + return 0; + + case WDIOC_SETTIMEOUT: + if (get_user(i, argp)) + return -EFAULT; + + if (wdrtas_set_interval(i)) + return -EINVAL; + + wdrtas_timer_keepalive(); + + if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE) + wdrtas_interval = i; + else + wdrtas_interval = wdrtas_get_interval(i); + /* fallthrough */ + + case WDIOC_GETTIMEOUT: + return put_user(wdrtas_interval, argp); + + default: + return -ENOIOCTLCMD; + } +} + +/** + * wdrtas_open - open function of watchdog device + * @inode: inode structure + * @file: file structure + * + * returns 0 on success, -EBUSY if the file has been opened already, <0 on + * other failures + * + * function called when watchdog device is opened + */ +static int +wdrtas_open(struct inode *inode, struct file *file) +{ + /* only open once */ + if (atomic_inc_return(&wdrtas_miscdev_open) > 1) { + atomic_dec(&wdrtas_miscdev_open); + return -EBUSY; + } + + wdrtas_timer_start(); + wdrtas_timer_keepalive(); + + return nonseekable_open(inode, file); +} + +/** + * wdrtas_close - close function of watchdog device + * @inode: inode structure + * @file: file structure + * + * returns 0 on success + * + * close function. Always succeeds + */ +static int +wdrtas_close(struct inode *inode, struct file *file) +{ + /* only stop watchdog, if this was announced using 'V' before */ + if (wdrtas_expect_close == WDRTAS_MAGIC_CHAR) + wdrtas_timer_stop(); + else { + printk(KERN_WARNING "wdrtas: got unexpected close. Watchdog " + "not stopped.\n"); + wdrtas_timer_keepalive(); + } + + wdrtas_expect_close = 0; + atomic_dec(&wdrtas_miscdev_open); + return 0; +} + +/** + * wdrtas_temp_read - gives back the temperature in fahrenheit + * @file: file structure + * @buf: user buffer + * @count: number of bytes to be read + * @ppos: position in file + * + * returns always 1 or -EFAULT in case of user space copy failures, <0 on + * other failures + * + * wdrtas_temp_read gives the temperature to the users by copying this + * value as one byte into the user space buffer. The unit is Fahrenheit... + */ +static ssize_t +wdrtas_temp_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + int temperature = 0; + + temperature = wdrtas_get_temperature(); + if (temperature < 0) + return temperature; + + if (copy_to_user(buf, &temperature, 1)) + return -EFAULT; + + return 1; +} + +/** + * wdrtas_temp_open - open function of temperature device + * @inode: inode structure + * @file: file structure + * + * returns 0 on success, <0 on failure + * + * function called when temperature device is opened + */ +static int +wdrtas_temp_open(struct inode *inode, struct file *file) +{ + return nonseekable_open(inode, file); +} + +/** + * wdrtas_temp_close - close function of temperature device + * @inode: inode structure + * @file: file structure + * + * returns 0 on success + * + * close function. Always succeeds + */ +static int +wdrtas_temp_close(struct inode *inode, struct file *file) +{ + return 0; +} + +/** + * wdrtas_reboot - reboot notifier function + * @nb: notifier block structure + * @code: reboot code + * @ptr: unused + * + * returns NOTIFY_DONE + * + * wdrtas_reboot stops the watchdog in case of a reboot + */ +static int +wdrtas_reboot(struct notifier_block *this, unsigned long code, void *ptr) +{ + if ( (code==SYS_DOWN) || (code==SYS_HALT) ) + wdrtas_timer_stop(); + + return NOTIFY_DONE; +} + +/*** initialization stuff */ + +static struct file_operations wdrtas_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = wdrtas_write, + .ioctl = wdrtas_ioctl, + .open = wdrtas_open, + .release = wdrtas_close, +}; + +static struct miscdevice wdrtas_miscdev = { + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &wdrtas_fops, +}; + +static struct file_operations wdrtas_temp_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .read = wdrtas_temp_read, + .open = wdrtas_temp_open, + .release = wdrtas_temp_close, +}; + +static struct miscdevice wdrtas_tempdev = { + .minor = TEMP_MINOR, + .name = "temperature", + .fops = &wdrtas_temp_fops, +}; + +static struct notifier_block wdrtas_notifier = { + .notifier_call = wdrtas_reboot, +}; + +/** + * wdrtas_get_tokens - reads in RTAS tokens + * + * returns 0 on succes, <0 on failure + * + * wdrtas_get_tokens reads in the tokens for the RTAS calls used in + * this watchdog driver. It tolerates, if "get-sensor-state" and + * "ibm,get-system-parameter" are not available. + */ +static int +wdrtas_get_tokens(void) +{ + wdrtas_token_get_sensor_state = rtas_token("get-sensor-state"); + if (wdrtas_token_get_sensor_state == RTAS_UNKNOWN_SERVICE) { + printk(KERN_WARNING "wdrtas: couldn't get token for " + "get-sensor-state. Trying to continue without " + "temperature support.\n"); + } + + wdrtas_token_get_sp = rtas_token("ibm,get-system-parameter"); + if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE) { + printk(KERN_WARNING "wdrtas: couldn't get token for " + "ibm,get-system-parameter. Trying to continue with " + "a default timeout value of %i seconds.\n", + WDRTAS_DEFAULT_INTERVAL); + } + + wdrtas_token_set_indicator = rtas_token("set-indicator"); + if (wdrtas_token_set_indicator == RTAS_UNKNOWN_SERVICE) { + printk(KERN_ERR "wdrtas: couldn't get token for " + "set-indicator. Terminating watchdog code.\n"); + return -EIO; + } + + wdrtas_token_event_scan = rtas_token("event-scan"); + if (wdrtas_token_event_scan == RTAS_UNKNOWN_SERVICE) { + printk(KERN_ERR "wdrtas: couldn't get token for event-scan. " + "Terminating watchdog code.\n"); + return -EIO; + } + + return 0; +} + +/** + * wdrtas_unregister_devs - unregisters the misc dev handlers + * + * wdrtas_register_devs unregisters the watchdog and temperature watchdog + * misc devs + */ +static void +wdrtas_unregister_devs(void) +{ + misc_deregister(&wdrtas_miscdev); + if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE) + misc_deregister(&wdrtas_tempdev); +} + +/** + * wdrtas_register_devs - registers the misc dev handlers + * + * returns 0 on succes, <0 on failure + * + * wdrtas_register_devs registers the watchdog and temperature watchdog + * misc devs + */ +static int +wdrtas_register_devs(void) +{ + int result; + + result = misc_register(&wdrtas_miscdev); + if (result) { + printk(KERN_ERR "wdrtas: couldn't register watchdog misc " + "device. Terminating watchdog code.\n"); + return result; + } + + if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE) { + result = misc_register(&wdrtas_tempdev); + if (result) { + printk(KERN_WARNING "wdrtas: couldn't register " + "watchdog temperature misc device. Continuing " + "without temperature support.\n"); + wdrtas_token_get_sensor_state = RTAS_UNKNOWN_SERVICE; + } + } + + return 0; +} + +/** + * wdrtas_init - init function of the watchdog driver + * + * returns 0 on succes, <0 on failure + * + * registers the file handlers and the reboot notifier + */ +static int __init +wdrtas_init(void) +{ + if (wdrtas_get_tokens()) + return -ENODEV; + + if (wdrtas_register_devs()) + return -ENODEV; + + if (register_reboot_notifier(&wdrtas_notifier)) { + printk(KERN_ERR "wdrtas: could not register reboot notifier. " + "Terminating watchdog code.\n"); + wdrtas_unregister_devs(); + return -ENODEV; + } + + if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE) + wdrtas_interval = WDRTAS_DEFAULT_INTERVAL; + else + wdrtas_interval = wdrtas_get_interval(WDRTAS_DEFAULT_INTERVAL); + + return 0; +} + +/** + * wdrtas_exit - exit function of the watchdog driver + * + * unregisters the file handlers and the reboot notifier + */ +static void __exit +wdrtas_exit(void) +{ + if (!wdrtas_nowayout) + wdrtas_timer_stop(); + + wdrtas_unregister_devs(); + + unregister_reboot_notifier(&wdrtas_notifier); +} + +module_init(wdrtas_init); +module_exit(wdrtas_exit); diff --git a/drivers/char/watchdog/wdt.c b/drivers/char/watchdog/wdt.c index 5684aa37988..ec7e401228e 100644 --- a/drivers/char/watchdog/wdt.c +++ b/drivers/char/watchdog/wdt.c @@ -63,12 +63,7 @@ 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) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); @@ -266,7 +261,7 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id, struct pt_regs *regs) printk(KERN_CRIT "Would Reboot.\n"); #else printk(KERN_CRIT "Initiating system reboot.\n"); - machine_restart(NULL); + emergency_restart(); #endif #else printk(KERN_CRIT "Reset in 5ms.\n"); diff --git a/drivers/char/watchdog/wdt977.c b/drivers/char/watchdog/wdt977.c index 072e9b21475..44d49dfacbb 100644 --- a/drivers/char/watchdog/wdt977.c +++ b/drivers/char/watchdog/wdt977.c @@ -53,12 +53,7 @@ MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (60..15300), default=" __M module_param(testmode, int, 0); MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); diff --git a/drivers/char/watchdog/wdt_pci.c b/drivers/char/watchdog/wdt_pci.c index 7651deda928..4b3311993d4 100644 --- a/drivers/char/watchdog/wdt_pci.c +++ b/drivers/char/watchdog/wdt_pci.c @@ -89,12 +89,7 @@ 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) ")"); -#ifdef CONFIG_WATCHDOG_NOWAYOUT -static int nowayout = 1; -#else -static int nowayout = 0; -#endif - +static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)"); @@ -311,7 +306,7 @@ static irqreturn_t wdtpci_interrupt(int irq, void *dev_id, struct pt_regs *regs) printk(KERN_CRIT PFX "Would Reboot.\n"); #else printk(KERN_CRIT PFX "Initiating system reboot.\n"); - machine_restart(NULL); + emergency_restart(NULL); #endif #else printk(KERN_CRIT PFX "Reset in 5ms.\n"); |