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include/atsha204a-i2c.h
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/*
* I2C Driver for Atmel ATSHA204 over I2C
*
* Copyright (C) 2014 Josh Datko, Cryptotronix, jbd@cryptotronix.com
* 2016 Tomas Hlavacek, CZ.NIC, tmshlvck@gmail.com
* 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ATSHA204_I2C_H_
#define _ATSHA204_I2C_H_
enum atsha204a_zone
{
ATSHA204A_ZONE_CONFIG = 0,
ATSHA204A_ZONE_OTP = 1,
ATSHA204A_ZONE_DATA = 2,
};
enum atsha204a_status
{
ATSHA204A_STATUS_SUCCESS = 0x00,
ATSHA204A_STATUS_MISCOMPARE = 0x01,
ATSHA204A_STATUS_PARSE_ERROR = 0x03,
ATSHA204A_STATUS_EXEC_ERROR = 0x0F,
ATSHA204A_STATUS_AFTER_WAKE = 0x11,
ATSHA204A_STATUS_CRC_ERROR = 0xFF,
};
enum atsha204a_func
{
ATSHA204A_FUNC_RESET = 0x00,
ATSHA204A_FUNC_SLEEP = 0x01,
ATSHA204A_FUNC_IDLE = 0x02,
ATSHA204A_FUNC_COMMAND = 0x03,
};
enum atsha204a_cmd
{
ATSHA204A_CMD_READ = 0x02,
ATSHA204A_CMD_RANDOM = 0x1B,
};
struct atsha204a_resp
{
u8 length;
u8 code;
u8 data[82];
} __attribute__ ((packed));
struct atsha204a_req
{
u8 function;
u8 length;
u8 command;
u8 param1;
u16 param2;
u8 data[78];
} __attribute__ ((packed));
int atsha204a_wakeup(struct udevice *);
int atsha204a_idle(struct udevice *);
int atsha204a_sleep(struct udevice *);
int atsha204a_read(struct udevice *, enum atsha204a_zone, bool, u16, u8 *);
int atsha204a_get_random(struct udevice *, u8 *, size_t);
#endif /* _ATSHA204_I2C_H_ */
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