#ifndef AT91TWI_H_
#define AT91TWI_H_

#include <stdint.h>

/* TWI slave addresses */
#define TWI_ADDR_BL1		0x21
#define TWI_ADDR_BL2		0x22
#define TWI_ADDR_BL3		0x23
#define TWI_ADDR_BL4		0x24
#define TWI_ADDR_EEPROM		0x40

/* TWIBOOT commands */
#define CMD_WAIT		0x00
#define CMD_GET_INFO		0x10
#define CMD_GET_SIGNATURE	0x11
#define CMD_WRITE_FLASH		0x12
#define CMD_READ_FLASH		0x13
#define CMD_WRITE_EEPROM	0x14
#define CMD_READ_EEPROM		0x15
#define CMD_BOOT_APPLICATION	0x1F

/* blctrl commands */
//#define CMD_WAIT		0x00
//#define CMD_GET_INFO		0x10
#define CMD_SET_PWM		0x21
#define CMD_GET_STATUS		0x22
//#define CMD_SET_PARAM		0x23
//#define CMD_GET_PARAM		0x24
#define CMD_BOOT_LOADER		0x2F


struct blmc_cmd {
	uint32_t cmd;		/* cmd byte(s) */
	uint8_t mode;		/* read/write, cmdlen (1-3 bytes) */
	uint16_t size;		/* data size */
	uint8_t *data;		/* read/write data */
};

/* same bits as TWI_MMR[8..15] */
#define BLMC_CMD_READ		0x10
#define BLMC_CMD_WRITE		0x00
#define BLMC_CMD_0_ARG		0x01
#define BLMC_CMD_1_ARG		0x02
#define BLMC_CMD_2_ARG		0x03

uint32_t twi_read_eeprom(uint32_t addr, uint8_t *buf, uint32_t size);
uint32_t twi_write_eeprom(uint32_t addr, uint8_t *buf, uint32_t size);

uint32_t twi_setpwm(uint8_t *values);

uint32_t twi_cmd(uint8_t addr, struct blmc_cmd *cmd);

void at91_twi_init(void);
void at91_twi_test(void);

#endif /*AT91TWI_H_*/