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