#include <sys/param.h>
#include <fcntl.h>
#include <stdio.h>
#include <err.h>

#include "/sys/dev/iicbus/iic.h"
#define EEPROM_WR_ADDR	0xA0
#define EEPROM_RD_ADDR	0xA1
#define COUNT		256

int
main(int argc, char **argv)
{
	int fd;
	struct iiccmd cmd;
	char buf[256];
	int i;

	if (argc != 2)
		errx(1, "Usage: %s <iic device>", argv[0]);
	if ( (fd = open(argv[1], O_RDWR)) < 0)
		err(1, "Opening device: %s", argv[1]);
	if (ioctl(fd, I2CRSTCARD, &cmd) != 0)
		err(1, "Ioctl I2CRSTCARD error");

	/* WRITE 0*/
	cmd.slave = EEPROM_WR_ADDR;
	cmd.count = 1;
	cmd.buf = buf; 
	cmd.last = 0;
	buf[0] = buf[1] = buf[2] = buf[3] = 0;
	if (ioctl(fd, I2CSTART, &cmd) != 0)
		err(1, "Ioctl I2CSTART error");
	cmd.slave = EEPROM_WR_ADDR;
	cmd.count = 1;
	cmd.buf = buf; 
	cmd.last = 0;
	if (ioctl(fd, I2CWRITE, &cmd) != 0)
		err(1, "Write Error");
	if (ioctl(fd, I2CSTOP) != 0)
		err(1, "Ioctl I2CSTOP error");

	/* Read COUNT Bytes */	
	cmd.slave = EEPROM_RD_ADDR;
	cmd.count = COUNT;
	cmd.buf = 0; 
	cmd.last = 0;
	buf[0] = buf[1] = buf[2] = buf[3] = 0;
	if (ioctl(fd, I2CSTART, &cmd) != 0)
		err(1, "Ioctl I2CSTART error");
	cmd.slave = EEPROM_RD_ADDR;
	cmd.count = COUNT;
	cmd.buf = buf; 
	cmd.last = 0;
	if (ioctl(fd, I2CREAD, &cmd) != 0)
		err(1, "Read Error");
	if (ioctl(fd, I2CSTOP) != 0)
		err(1, "Ioctl I2CSTOP error");
	for (i=0; i < COUNT; ++i)
		printf("%c", buf[i]);
	return 0;
}