| Marek Behún | ef2b6b1 | 2017-06-09 19:28:44 +0200 | [diff] [blame] | 1 | /* |
| 2 | * I2C Driver for Atmel ATSHA204 over I2C |
| 3 | * |
| 4 | * Copyright (C) 2014 Josh Datko, Cryptotronix, jbd@cryptotronix.com |
| 5 | * 2016 Tomas Hlavacek, CZ.NIC, tmshlvck@gmail.com |
| 6 | * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | #ifndef _ATSHA204_I2C_H_ |
| 13 | #define _ATSHA204_I2C_H_ |
| 14 | |
| 15 | enum atsha204a_zone |
| 16 | { |
| 17 | ATSHA204A_ZONE_CONFIG = 0, |
| 18 | ATSHA204A_ZONE_OTP = 1, |
| 19 | ATSHA204A_ZONE_DATA = 2, |
| 20 | }; |
| 21 | |
| 22 | enum atsha204a_status |
| 23 | { |
| 24 | ATSHA204A_STATUS_SUCCESS = 0x00, |
| 25 | ATSHA204A_STATUS_MISCOMPARE = 0x01, |
| 26 | ATSHA204A_STATUS_PARSE_ERROR = 0x03, |
| 27 | ATSHA204A_STATUS_EXEC_ERROR = 0x0F, |
| 28 | ATSHA204A_STATUS_AFTER_WAKE = 0x11, |
| 29 | ATSHA204A_STATUS_CRC_ERROR = 0xFF, |
| 30 | }; |
| 31 | |
| 32 | enum atsha204a_func |
| 33 | { |
| 34 | ATSHA204A_FUNC_RESET = 0x00, |
| 35 | ATSHA204A_FUNC_SLEEP = 0x01, |
| 36 | ATSHA204A_FUNC_IDLE = 0x02, |
| 37 | ATSHA204A_FUNC_COMMAND = 0x03, |
| 38 | }; |
| 39 | |
| 40 | enum atsha204a_cmd |
| 41 | { |
| 42 | ATSHA204A_CMD_READ = 0x02, |
| 43 | ATSHA204A_CMD_RANDOM = 0x1B, |
| 44 | }; |
| 45 | |
| 46 | struct atsha204a_resp |
| 47 | { |
| 48 | u8 length; |
| 49 | u8 code; |
| 50 | u8 data[82]; |
| 51 | } __attribute__ ((packed)); |
| 52 | |
| 53 | struct atsha204a_req |
| 54 | { |
| 55 | u8 function; |
| 56 | u8 length; |
| 57 | u8 command; |
| 58 | u8 param1; |
| 59 | u16 param2; |
| 60 | u8 data[78]; |
| 61 | } __attribute__ ((packed)); |
| 62 | |
| 63 | int atsha204a_wakeup(struct udevice *); |
| 64 | int atsha204a_idle(struct udevice *); |
| 65 | int atsha204a_sleep(struct udevice *); |
| 66 | int atsha204a_read(struct udevice *, enum atsha204a_zone, bool, u16, u8 *); |
| 67 | int atsha204a_get_random(struct udevice *, u8 *, size_t); |
| 68 | |
| 69 | #endif /* _ATSHA204_I2C_H_ */ |