#include "smbus.h"

smbus_callback_t smbus_ds2460_write;
smbus_callback_t smbus_ds2460_read;

// Specification
#define DS2460_EEPROM_SIZE 112
#define DS2460_INPUT_BUFFER_SIZE 64

#define DS2460_MAC_LEN 20

// Registers
#define DS2460_MEM_SHA 0x00
#define DS2460_MEM_MAC 0x40
#define DS2460_MEM_SSECRET 0x54
#define DS2460_MEM_CMD 0x5C
#define DS2460_MEM_MATCHMAC 0x5E
#define DS2460_MEM_ESECRET1 0x60
#define DS2460_MEM_ESECRET2 0x68
#define DS2460_MEM_ESECRET3 0x70
#define DS2460_MEM_EEPROM 0x80
#define DS2460_MEM_SERIAL 0xF0

#define DS2460_CMD_COMPUTE 0x80
#define DS2460_CMD_COMPUTE_GP_SHA 0x20
#define DS2460_CMD_COMPUTE_TO_MAC_BUFFER 0x04

#define DS2460_CMD_TXSECRET 0x40

// Consts
#define DS2460_REQUEST_COMPUTE_MAC 0x94

// Wiring
#define DS2460_GND 0
#define DS2460_VCC 1

#define DS2460_PIN_AD0 DS2460_GND
#define DS2460_PIN_AD1 DS2460_VCC
#define DS2460_PIN_AD2 DS2460_VCC

#define DS2460_ADDRESS \
    (0b10'0'0'0'0'0 | DS2460_PIN_AD0 | (DS2460_PIN_AD1 << 2) | (DS2460_PIN_AD2 << 4))