#include <sys/i2ceeprom.h>
#include <sys/assert.h>

#include <stdint.h>

#include <rb2/regbus.h>
#include <hwo/i2c.h>

struct _i2cee i2cee;

int32_t	eeptr;
int32_t	eevalue;
int32_t	eestatus;


void i2cee_identify(void){
	uint8_t i;
	uint8_t buffer[4];
	uint16_t result;
	
	for (i=0;i<8;i++){
		buffer[0] = 0x00;
		buffer[1] = 0x00;
		
		result = (i2c_transfer( 0xA0 + (i<<1), buffer, 2 ));
		if (result == 2){
			i2cee.emask |= (1<<i);
			i2cee.size += 1L<<16;
		};
	};
};

uint8_t	i2cee_register_proc(RB2_REGISTER *reg,RB2_TELEGRAM *telegram){
	
	if (telegram->flags.read){
		switch (telegram->regno){
			case 0x9000:
				telegram->i32 = i2cee_size();
				return 0;
			case 0x9001:
				telegram->i32 = i2cee.emask;
				return 0;
				
			case 0x9010:
				telegram->i32 = eeptr;
				return 0;
			case 0x9011:
				telegram->i32 = eevalue;
				return 0;				
			case 0x9012:
				telegram->i32 = eestatus;
				return 0;
		};
	} else {
		switch (telegram->regno){
			case 0x9010:
				eeptr = telegram->i32;
				i2cee_load(eeptr,&eevalue,4);
				return 0;
			case 0x9011:
				eevalue = telegram->i32;
				eestatus = i2cee_save(eeptr,&eevalue,4);
				return 0;
			case 0x9012:
				return 0;
		};
	};
	
	return -1;
};