static int flashpchar(struct airo_info *ai,int byte,int dwelltime) {
	int echo;
	int waittime;

	byte |= 0x8000;

	if(dwelltime == 0 )
		dwelltime = 200;

	waittime=dwelltime;

	/* Wait for busy bit d15 to go false indicating buffer empty */
	while ((IN4500 (ai, SWS0) & 0x8000) && waittime > 0) {
		udelay (50);
		waittime -= 50;
	}

	/* timeout for busy clear wait */
	if(waittime <= 0 ){
		airo_print_info(ai->dev->name, "flash putchar busywait timeout!");
		return -EBUSY;
	}

	/* Port is clear now write byte and wait for it to echo back */
	do {
		OUT4500(ai,SWS0,byte);
		udelay(50);
		dwelltime -= 50;
		echo = IN4500(ai,SWS1);
	} while (dwelltime >= 0 && echo != byte);

	OUT4500(ai,SWS1,0);

	return (echo == byte) ? 0 : -EIO;
}
static int flashpchar(struct airo_info *ai,int byte,int dwelltime) {
	int echo;
	int waittime;

	byte |= 0x8000;

	if(dwelltime == 0 )
		dwelltime = 200;

	waittime=dwelltime;

	 
	while ((IN4500 (ai, SWS0) & 0x8000) && waittime > 0) {
		udelay (50);
		waittime -= 50;
	}

	 
	if(waittime <= 0 ){
		airo_print_info(ai->dev->name, "flash putchar busywait timeout!");
		return -EBUSY;
	}

	 
	do {
		OUT4500(ai,SWS0,byte);
		udelay(50);
		dwelltime -= 50;
		echo = IN4500(ai,SWS1);
	} while (dwelltime >= 0 && echo != byte);

	OUT4500(ai,SWS1,0);

	return (echo == byte) ? 0 : -EIO;
}