diff options
Diffstat (limited to 'include/atsha204a-i2c.h')
| -rw-r--r-- | include/atsha204a-i2c.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/atsha204a-i2c.h b/include/atsha204a-i2c.h new file mode 100644 index 0000000..344fd8a --- /dev/null +++ b/include/atsha204a-i2c.h @@ -0,0 +1,69 @@ +/* + * 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_ */ |