keydriver.h

uClinux 基于S3C44B0X 键盘驱动

#ifndef _KEYDRIVER_H
#define _KEYDRIVER_H

#include <linux/version.h>
#include <linux/kernel.h>     /* We're doing kernel work */
#include <linux/module.h>     /* Specifically, a module */ 
#include <linux/interrupt.h>  /* We want interrupts */

#include <linux/miscdevice.h> /* for misc_register() and misc_deregister() */
#include <linux/fs.h>         /* for struct 'file_operations' */
#include <linux/timer.h>     /* for timeout interrupts */
#include <linux/param.h>     /* for HZ. HZ = 100 and the timer step is 1/100 */
#include <linux/sched.h>     /* for jiffies definition. jiffies is incremented
                              * once for each clock tick; thus it's incremented*/
#include <linux/mm.h>        /* for verify_area */
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/init.h>

//#include <string.h>
//#include <stdlib.h>

#include <asm/irq.h>         /* For IRQ_MACHSPEC */
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/arch/irqs.h>
#include <asm/arch/hardware.h>
#include <asm/arch/44b.h>
#include <asm/arch/def.h>

#include "key.h"


#define DEVICE_NAME    "s3c44b0key"
#define KEY_MAJOR      123 
#define KEY_MINOR       0
#define KEY_BUF_SIZE		 16 // key buffer size


#define KEY_TIMER_DELAY   (HZ/10)   /*100ms*/
#define KEY_TIMER_DELAY1  (HZ/50)  /*10ms*/

#define delayLoopCount (400)

#ifdef CONFIG_DEVFS_FS 
	static devfs_handle_t devfs_kbd_dir,devfs_kbdraw;
#endif
//struct KEYDEV;
//****************************************
//****************************************
/*static struct file_operations key_fops=
{
		owner:    THIS_MODULE,
		read :    key_read,
		ioctl:    key_ioctl,
		open :    key_open,
		release:  key_release,	
};
*/

typedef struct _KBDDEV{
//static struct KBDDEV{
	unsigned int head;
	unsigned int tail;
	//unsigned int keystatus;
	unsigned char buf[KEY_BUF_SIZE];
	wait_queue_head_t wq;
	struct fasync_struct *fasync_queue;
} KBDDEV,*PKBDDEV;
//}

static KBDDEV *keydev;

#define BUF_HEAD  			(keydev->buf[keydev->head])  //缓冲区头
#define BUF_TAIL  			(keydev->buf[keydev->tail])  //缓冲区尾
#define INCBUF(x,mod)		((++(x)&(mod)-1))	         //移动缓冲区指针


//static U16 key;
//static struct timer_list key_timer;

#endif