| /* |
| * Generic watchdog defines. Derived from.. |
| * |
| * Berkshire PC Watchdog Defines |
| * by Ken Hollis <khollis@bitgate.com> |
| * |
| */ |
| |
| #ifndef _LINUX_WATCHDOG_H |
| #define _LINUX_WATCHDOG_H |
| |
| #include <linux/ioctl.h> |
| #include <linux/types.h> |
| |
| #define WATCHDOG_IOCTL_BASE 'W' |
| |
| struct watchdog_info { |
| __u32 options; /* Options the card/driver supports */ |
| __u32 firmware_version; /* Firmware version of the card */ |
| __u8 identity[32]; /* Identity of the board */ |
| }; |
| |
| #define WDIOC_GETSUPPORT _IOR(WATCHDOG_IOCTL_BASE, 0, struct watchdog_info) |
| #define WDIOC_GETSTATUS _IOR(WATCHDOG_IOCTL_BASE, 1, int) |
| #define WDIOC_GETBOOTSTATUS _IOR(WATCHDOG_IOCTL_BASE, 2, int) |
| #define WDIOC_GETTEMP _IOR(WATCHDOG_IOCTL_BASE, 3, int) |
| #define WDIOC_SETOPTIONS _IOR(WATCHDOG_IOCTL_BASE, 4, int) |
| #define WDIOC_KEEPALIVE _IOR(WATCHDOG_IOCTL_BASE, 5, int) |
| #define WDIOC_SETTIMEOUT _IOWR(WATCHDOG_IOCTL_BASE, 6, int) |
| #define WDIOC_GETTIMEOUT _IOR(WATCHDOG_IOCTL_BASE, 7, int) |
| #define WDIOC_SETPRETIMEOUT _IOWR(WATCHDOG_IOCTL_BASE, 8, int) |
| #define WDIOC_GETPRETIMEOUT _IOR(WATCHDOG_IOCTL_BASE, 9, int) |
| #define WDIOC_GETTIMELEFT _IOR(WATCHDOG_IOCTL_BASE, 10, int) |
| |
| #define WDIOF_UNKNOWN -1 /* Unknown flag error */ |
| #define WDIOS_UNKNOWN -1 /* Unknown status error */ |
| |
| #define WDIOF_OVERHEAT 0x0001 /* Reset due to CPU overheat */ |
| #define WDIOF_FANFAULT 0x0002 /* Fan failed */ |
| #define WDIOF_EXTERN1 0x0004 /* External relay 1 */ |
| #define WDIOF_EXTERN2 0x0008 /* External relay 2 */ |
| #define WDIOF_POWERUNDER 0x0010 /* Power bad/power fault */ |
| #define WDIOF_CARDRESET 0x0020 /* Card previously reset the CPU */ |
| #define WDIOF_POWEROVER 0x0040 /* Power over voltage */ |
| #define WDIOF_SETTIMEOUT 0x0080 /* Set timeout (in seconds) */ |
| #define WDIOF_MAGICCLOSE 0x0100 /* Supports magic close char */ |
| #define WDIOF_PRETIMEOUT 0x0200 /* Pretimeout (in seconds), get/set */ |
| #define WDIOF_KEEPALIVEPING 0x8000 /* Keep alive ping reply */ |
| |
| #define WDIOS_DISABLECARD 0x0001 /* Turn off the watchdog timer */ |
| #define WDIOS_ENABLECARD 0x0002 /* Turn on the watchdog timer */ |
| #define WDIOS_TEMPPANIC 0x0004 /* Kernel panic on temperature trip */ |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/bitops.h> |
| |
| struct watchdog_ops; |
| struct watchdog_device; |
| |
| /** struct watchdog_ops - The watchdog-devices operations |
| * |
| * @owner: The module owner. |
| * @start: The routine for starting the watchdog device. |
| * @stop: The routine for stopping the watchdog device. |
| * @ping: The routine that sends a keepalive ping to the watchdog device. |
| * @status: The routine that shows the status of the watchdog device. |
| * @set_timeout:The routine for setting the watchdog devices timeout value. |
| * @ioctl: The routines that handles extra ioctl calls. |
| * |
| * The watchdog_ops structure contains a list of low-level operations |
| * that control a watchdog device. It also contains the module that owns |
| * these operations. The start and stop function are mandatory, all other |
| * functions are optonal. |
| */ |
| struct watchdog_ops { |
| struct module *owner; |
| /* mandatory operations */ |
| int (*start)(struct watchdog_device *); |
| int (*stop)(struct watchdog_device *); |
| /* optional operations */ |
| int (*ping)(struct watchdog_device *); |
| unsigned int (*status)(struct watchdog_device *); |
| int (*set_timeout)(struct watchdog_device *, unsigned int); |
| long (*ioctl)(struct watchdog_device *, unsigned int, unsigned long); |
| }; |
| |
| /** struct watchdog_device - The structure that defines a watchdog device |
| * |
| * @info: Pointer to a watchdog_info structure. |
| * @ops: Pointer to the list of watchdog operations. |
| * @bootstatus: Status of the watchdog device at boot. |
| * @timeout: The watchdog devices timeout value. |
| * @min_timeout:The watchdog devices minimum timeout value. |
| * @max_timeout:The watchdog devices maximum timeout value. |
| * @driver-data:Pointer to the drivers private data. |
| * @status: Field that contains the devices internal status bits. |
| * |
| * The watchdog_device structure contains all information about a |
| * watchdog timer device. |
| * |
| * The driver-data field may not be accessed directly. It must be accessed |
| * via the watchdog_set_drvdata and watchdog_get_drvdata helpers. |
| */ |
| struct watchdog_device { |
| const struct watchdog_info *info; |
| const struct watchdog_ops *ops; |
| unsigned int bootstatus; |
| unsigned int timeout; |
| unsigned int min_timeout; |
| unsigned int max_timeout; |
| void *driver_data; |
| unsigned long status; |
| /* Bit numbers for status flags */ |
| #define WDOG_ACTIVE 0 /* Is the watchdog running/active */ |
| #define WDOG_DEV_OPEN 1 /* Opened via /dev/watchdog ? */ |
| #define WDOG_ALLOW_RELEASE 2 /* Did we receive the magic char ? */ |
| #define WDOG_NO_WAY_OUT 3 /* Is 'nowayout' feature set ? */ |
| }; |
| |
| #ifdef CONFIG_WATCHDOG_NOWAYOUT |
| #define WATCHDOG_NOWAYOUT 1 |
| #define WATCHDOG_NOWAYOUT_INIT_STATUS (1 << WDOG_NO_WAY_OUT) |
| #else |
| #define WATCHDOG_NOWAYOUT 0 |
| #define WATCHDOG_NOWAYOUT_INIT_STATUS 0 |
| #endif |
| |
| /* Use the following function to set the nowayout feature */ |
| static inline void watchdog_set_nowayout(struct watchdog_device *wdd, bool nowayout) |
| { |
| if (nowayout) |
| set_bit(WDOG_NO_WAY_OUT, &wdd->status); |
| } |
| |
| /* Use the following functions to manipulate watchdog driver specific data */ |
| static inline void watchdog_set_drvdata(struct watchdog_device *wdd, void *data) |
| { |
| wdd->driver_data = data; |
| } |
| |
| static inline void *watchdog_get_drvdata(struct watchdog_device *wdd) |
| { |
| return wdd->driver_data; |
| } |
| |
| /* drivers/watchdog/core/watchdog_core.c */ |
| extern int watchdog_register_device(struct watchdog_device *); |
| extern void watchdog_unregister_device(struct watchdog_device *); |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* ifndef _LINUX_WATCHDOG_H */ |