atsha204a-i2c.h 1.5 KB

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  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. enum atsha204a_zone
  15. {
  16. ATSHA204A_ZONE_CONFIG = 0,
  17. ATSHA204A_ZONE_OTP = 1,
  18. ATSHA204A_ZONE_DATA = 2,
  19. };
  20. enum atsha204a_status
  21. {
  22. ATSHA204A_STATUS_SUCCESS = 0x00,
  23. ATSHA204A_STATUS_MISCOMPARE = 0x01,
  24. ATSHA204A_STATUS_PARSE_ERROR = 0x03,
  25. ATSHA204A_STATUS_EXEC_ERROR = 0x0F,
  26. ATSHA204A_STATUS_AFTER_WAKE = 0x11,
  27. ATSHA204A_STATUS_CRC_ERROR = 0xFF,
  28. };
  29. enum atsha204a_func
  30. {
  31. ATSHA204A_FUNC_RESET = 0x00,
  32. ATSHA204A_FUNC_SLEEP = 0x01,
  33. ATSHA204A_FUNC_IDLE = 0x02,
  34. ATSHA204A_FUNC_COMMAND = 0x03,
  35. };
  36. enum atsha204a_cmd
  37. {
  38. ATSHA204A_CMD_READ = 0x02,
  39. ATSHA204A_CMD_RANDOM = 0x1B,
  40. };
  41. struct atsha204a_resp
  42. {
  43. u8 length;
  44. u8 code;
  45. u8 data[82];
  46. } __attribute__ ((packed));
  47. struct atsha204a_req
  48. {
  49. u8 function;
  50. u8 length;
  51. u8 command;
  52. u8 param1;
  53. u16 param2;
  54. u8 data[78];
  55. } __attribute__ ((packed));
  56. int atsha204a_wakeup(struct udevice *);
  57. int atsha204a_idle(struct udevice *);
  58. int atsha204a_sleep(struct udevice *);
  59. int atsha204a_read(struct udevice *, enum atsha204a_zone, bool, u16, u8 *);
  60. int atsha204a_get_random(struct udevice *, u8 *, size_t);
  61. #endif /* _ATSHA204_I2C_H_ */