#include<linux/fs.h>#include<linux/kernel.h>#include<linux/module.h>#include<linux/configfs.h>#include<linux/init.h>#include<linux/types.h>#include<linux/ioctl.h>#include<asm/io.h>#include<asm/uaccess.h>#define	TIMER_IOC_LL		0xdc#define	TIMER_OPEN		_IOW(TIMER_IOC_LL,0,int)#define	TIMER			_IOW(TIMER_IOC_LL,1,int)#define	TIMER_CLOSE		_IOW(TIMER_IOC_LL,2,int)#define	TIMER_GET		_IOW(TIMER_IOC_LL,4,int)#define	MAJOR_MINOR	252
#define	DEVICE_NAME		"lltimer"int	timer_open(struct inode *node,struct file *fop){	outb_p(0x80,0x63);	return 0;}int	timer_close(struct inode *node,struct file *fop){	return 0;}static int timer_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg){	unsigned char data;	switch(cmd)	{		case 	TIMER_OPEN:			outb_p(0x03,0x61);			outb_p(0xbe,0x43);			break;		case 	TIMER:			data=arg&0xff;			outb_p(data,0x42);			data=(arg>>8)&0xff;			outb_p(data,0x42);			break;		case 	TIMER_CLOSE:			outb_p(0x00,0x61);			break;		case		TIMER_GET:			outb_p(0x60,arg);			//inb_p(0x60,arg);			break;		default:				break;	}	return 0;}struct file_operations fop={			open:	timer_open,	release:	timer_close,	ioctl:	timer_ioctl,};int init_module(){	register_chrdev(MAJOR_MINOR,DEVICE_NAME,&fop);	return 0;}void cleanup_module(){	unregister_chrdev(MAJOR_MINOR,DEVICE_NAME);}