imx2_wdt.c File Reference

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/watchdog.h>
#include <linux/clk.h>
#include <linux/fs.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <mach/hardware.h>

Go to the source code of this file.

Macros
#define	DRIVER_NAME   "imx2-wdt"
#define	IMX2_WDT_WCR   0x00 /* Control Register */
#define	IMX2_WDT_WCR_WT   (0xFF << 8) /* -> Watchdog Timeout Field */
#define	IMX2_WDT_WCR_WRE   (1 << 3) /* -> WDOG Reset Enable */
#define	IMX2_WDT_WCR_WDE   (1 << 2) /* -> Watchdog Enable */
#define	IMX2_WDT_WSR   0x02 /* Service Register */
#define	IMX2_WDT_SEQ1   0x5555 /* -> service sequence 1 */
#define	IMX2_WDT_SEQ2   0xAAAA /* -> service sequence 2 */
#define	IMX2_WDT_WRSR   0x04 /* Reset Status Register */
#define	IMX2_WDT_WRSR_TOUT   (1 << 1) /* -> Reset due to Timeout */
#define	IMX2_WDT_MAX_TIME   128
#define	IMX2_WDT_DEFAULT_TIME   60 /* in seconds */
#define	WDOG_SEC_TO_COUNT(s)   ((s * 2 - 1) << 8)
#define	IMX2_WDT_STATUS_OPEN   0
#define	IMX2_WDT_STATUS_STARTED   1
#define	IMX2_WDT_EXPECT_CLOSE   2

Functions
	module_param (nowayout, bool, 0)
	MODULE_PARM_DESC (nowayout,"Watchdog cannot be stopped once started (default="__MODULE_STRING(WATCHDOG_NOWAYOUT)")")
	module_param (timeout, uint, 0)
	MODULE_PARM_DESC (timeout,"Watchdog timeout in seconds (default="__MODULE_STRING(IMX2_WDT_DEFAULT_TIME)")")
	module_init (imx2_wdt_init)
	module_exit (imx2_wdt_exit)
	MODULE_AUTHOR ("Wolfram Sang")
	MODULE_DESCRIPTION ("Watchdog driver for IMX2 and later")
	MODULE_LICENSE ("GPL v2")
	MODULE_ALIAS_MISCDEV (WATCHDOG_MINOR)
	MODULE_ALIAS ("platform:"DRIVER_NAME)

Macro Definition Documentation

#define DRIVER_NAME   "imx2-wdt"

Definition at line 38 of file imx2_wdt.c.

#define IMX2_WDT_DEFAULT_TIME   60 /* in seconds */

Definition at line 53 of file imx2_wdt.c.

#define IMX2_WDT_EXPECT_CLOSE   2

Definition at line 59 of file imx2_wdt.c.

#define IMX2_WDT_MAX_TIME   128

Definition at line 52 of file imx2_wdt.c.

#define IMX2_WDT_SEQ1   0x5555 /* -> service sequence 1 */

Definition at line 46 of file imx2_wdt.c.

#define IMX2_WDT_SEQ2   0xAAAA /* -> service sequence 2 */

Definition at line 47 of file imx2_wdt.c.

#define IMX2_WDT_STATUS_OPEN   0

Definition at line 57 of file imx2_wdt.c.

#define IMX2_WDT_STATUS_STARTED   1

Definition at line 58 of file imx2_wdt.c.

#define IMX2_WDT_WCR   0x00 /* Control Register */

Definition at line 40 of file imx2_wdt.c.

#define IMX2_WDT_WCR_WDE   (1 << 2) /* -> Watchdog Enable */

Definition at line 43 of file imx2_wdt.c.

#define IMX2_WDT_WCR_WRE   (1 << 3) /* -> WDOG Reset Enable */

Definition at line 42 of file imx2_wdt.c.

#define IMX2_WDT_WCR_WT   (0xFF << 8) /* -> Watchdog Timeout Field */

Definition at line 41 of file imx2_wdt.c.

#define IMX2_WDT_WRSR   0x04 /* Reset Status Register */

Definition at line 49 of file imx2_wdt.c.

#define IMX2_WDT_WRSR_TOUT   (1 << 1) /* -> Reset due to Timeout */

Definition at line 50 of file imx2_wdt.c.

#define IMX2_WDT_WSR   0x02 /* Service Register */

Definition at line 45 of file imx2_wdt.c.

#define WDOG_SEC_TO_COUNT

(

s

)

((s * 2 - 1) << 8)

Definition at line 55 of file imx2_wdt.c.

Function Documentation

MODULE_ALIAS

(

"platform:"

DRIVER_NAME

)

MODULE_ALIAS_MISCDEV

(

WATCHDOG_MINOR

)

MODULE_AUTHOR

(

"Wolfram Sang"

)

MODULE_DESCRIPTION

(

"Watchdog driver for IMX2 and later"

)

module_exit

(

imx2_wdt_exit

)

module_init

(

imx2_wdt_init

)

MODULE_LICENSE

(

"GPL v2"

)

module_param	(	nowayout	,
		bool	,
		0
	)

module_param	(	timeout	,
		uint	,
		0
	)

MODULE_PARM_DESC	(	nowayout	,
		"Watchdog cannot be stopped once started (default="__MODULE_STRING(WATCHDOG_NOWAYOUT)")"
	)

MODULE_PARM_DESC	(	timeout	,
		"Watchdog timeout in seconds (default="__MODULE_STRING(IMX2_WDT_DEFAULT_TIME)")"
	)

Variable Documentation

void __iomem* base

Definition at line 63 of file imx2_wdt.c.

struct clk* clk

Definition at line 62 of file imx2_wdt.c.

unsigned long status

Definition at line 65 of file imx2_wdt.c.

unsigned timeout = IMX2_WDT_DEFAULT_TIME

Definition at line 64 of file imx2_wdt.c.

struct timer_list timer

Definition at line 66 of file imx2_wdt.c.