ir.c

键盘设备驱动,只需修改代码里的功能码和系统码即可使用

#include <linux/kernel.h>
#include <linux/module.h>
#include "iop.h"
void init_ir(void);

#define	UINT32	u32
#define	UINT16	u16
UINT32 *iop_data=(UINT32 *)0xbffe8720;

#define IR_PHILIPS
#define  IR_IDcode                      0x0007

#ifdef IR_PHILIPS       
#define IOP_IR_DATA()		((iop_data[6]>>6)&0x5f)  //((iop_data[6]>>6)&0x5f)
#define TRANS_IR_CODE(rx)	(rx&0x003f)
#else
#define IOP_IR_DATA()		(iop_data[6])
#define TRANS_IR_CODE(rx)	reverse_fun(rx)
#endif
int ir_flag = 0;

void reset_ir(void)
{
	iop_data[IR_PORT]|=IrRepeatRate(4);
}

void init_ir()
{
	reset_ir();
}

int read_ir(void)
{
	UINT16 rx;    
	UINT16 unCustId;

	rx = iop_data[IR_PORT];
	if (!(rx & IR_RDY)) {
		return /*IRC_NULL*/-1;
	}
	else {
		unCustId = IOP_IR_DATA();        
		iop_data[IR_PORT] = rx & (~IR_RDY);  
		rx = rx & 0x0ff;
		
		 if(unCustId==IR_IDcode)
		 {  
		 	//printk("unCustId=%x\n",unCustId);
			ir_flag = 0;
		  	return rx;
		 }
		else if(unCustId == 0x0003)
		 {
		 	ir_flag = 1;
		   	return rx;
		}
		else
		{
			rx=0x007f;   // return none      huang
		   	return rx;
		}
	
		/*
		printk("unCustId=%x\n",unCustId);
		printk("rx = %x\n",rx);
		return rx;
		*/
	
	}
}