3f43f68e29
Add min_timeout (minimum timeout) and max_timeout values so that the framework can check if the new timeout value is between the minimum and maximum timeout values. If both values are 0, then the framework will leave the check for the watchdog device driver itself. Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
143 lines
5.1 KiB
C
143 lines
5.1 KiB
C
/*
|
|
* 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__
|
|
|
|
#ifdef CONFIG_WATCHDOG_NOWAYOUT
|
|
#define WATCHDOG_NOWAYOUT 1
|
|
#else
|
|
#define WATCHDOG_NOWAYOUT 0
|
|
#endif
|
|
|
|
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 ? */
|
|
};
|
|
|
|
/* 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 */
|