w1.h 1.4 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+
  2. *
  3. * Copyright (c) 2015 Free Electrons
  4. * Copyright (c) 2015 NextThing Co
  5. *
  6. */
  7. #ifndef __W1_H
  8. #define __W1_H
  9. struct udevice;
  10. #define W1_FAMILY_DS24B33 0x23
  11. #define W1_FAMILY_DS2431 0x2d
  12. #define W1_FAMILY_DS2502 0x09
  13. #define W1_FAMILY_EEP_SANDBOX 0xfe
  14. struct w1_driver_entry {
  15. struct driver *driver;
  16. u8 *family;
  17. };
  18. /* U_BOOT_W1_DEVICE() tells U-Boot to create a one-wire device.
  19. *
  20. * @__name: Device name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
  21. * @__driver: Driver name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
  22. * @__family: Family code number of the one-wire
  23. */
  24. #define U_BOOT_W1_DEVICE(__name, __family) \
  25. ll_entry_declare(struct w1_driver_entry, __name, w1_driver_entry) = { \
  26. .driver = llsym(struct driver, __name, driver), \
  27. .family = __family, \
  28. }
  29. struct w1_device {
  30. u64 id;
  31. };
  32. struct w1_ops {
  33. u8 (*read_byte)(struct udevice *dev);
  34. bool (*reset)(struct udevice *dev);
  35. u8 (*triplet)(struct udevice *dev, bool bdir);
  36. void (*write_byte)(struct udevice *dev, u8 byte);
  37. };
  38. int w1_get_bus(int busnum, struct udevice **busp);
  39. u8 w1_get_device_family(struct udevice *dev);
  40. int w1_read_buf(struct udevice *dev, u8 *buf, unsigned int count);
  41. int w1_read_byte(struct udevice *dev);
  42. int w1_reset_select(struct udevice *dev);
  43. int w1_write_buf(struct udevice *dev, u8 *buf, unsigned int count);
  44. int w1_write_byte(struct udevice *dev, u8 byte);
  45. #endif