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 Beh��n, CZ.NIC, kabel@kernel.org
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
15enum atsha204a_zone
16{
17	ATSHA204A_ZONE_CONFIG	= 0,
18	ATSHA204A_ZONE_OTP	= 1,
19	ATSHA204A_ZONE_DATA	= 2,
20};
21
22enum 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
32enum 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
40enum atsha204a_cmd
41{
42	ATSHA204A_CMD_READ	= 0x02,
43	ATSHA204A_CMD_RANDOM	= 0x1B,
44};
45
46struct atsha204a_resp
47{
48	u8 length;
49	u8 code;
50	u8 data[82];
51} __attribute__ ((packed));
52
53struct 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
63int atsha204a_wakeup(struct udevice *);
64int atsha204a_idle(struct udevice *);
65int atsha204a_sleep(struct udevice *);
66int atsha204a_read(struct udevice *, enum atsha204a_zone, bool, u16, u8 *);
67int atsha204a_get_random(struct udevice *, u8 *, size_t);
68
69#endif /* _ATSHA204_I2C_H_ */
70