projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| d3e19cf9 MR |
1 | /* SPDX-License-Identifier: GPL-2.0+ |
| 2 | * | |
| 3 | * Copyright (c) 2015 Free Electrons | |
| 4 | * Copyright (c) 2015 NextThing Co | |
| 5 | * | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef __W1_H | |
| 9 | #define __W1_H | |
| 10 | ||
| 411e9eb8 | 11 | struct udevice; |
| d3e19cf9 MR |
12 | |
| 13 | #define W1_FAMILY_DS24B33 0x23 | |
| 14 | #define W1_FAMILY_DS2431 0x2d | |
| f9c87adc | 15 | #define W1_FAMILY_DS2502 0x09 |
| 84e55bdd | 16 | #define W1_FAMILY_EEP_SANDBOX 0xfe |
| d3e19cf9 | 17 | |
| c9dffc97 KM |
18 | struct w1_driver_entry { |
| 19 | struct driver *driver; | |
| 20 | u8 *family; | |
| 21 | }; | |
| 22 | ||
| 23 | /* U_BOOT_W1_DEVICE() tells U-Boot to create a one-wire device. | |
| 24 | * | |
| 25 | * @__name: Device name (C identifier, not a string. E.g. gpio7_at_ff7e0000) | |
| 26 | * @__driver: Driver name (C identifier, not a string. E.g. gpio7_at_ff7e0000) | |
| 27 | * @__family: Family code number of the one-wire | |
| 28 | */ | |
| 29 | #define U_BOOT_W1_DEVICE(__name, __family) \ | |
| 30 | ll_entry_declare(struct w1_driver_entry, __name, w1_driver_entry) = { \ | |
| 31 | .driver = llsym(struct driver, __name, driver), \ | |
| 32 | .family = __family, \ | |
| 33 | } | |
| 34 | ||
| d3e19cf9 MR |
35 | struct w1_device { |
| 36 | u64 id; | |
| 37 | }; | |
| 38 | ||
| 39 | struct w1_ops { | |
| 40 | u8 (*read_byte)(struct udevice *dev); | |
| 41 | bool (*reset)(struct udevice *dev); | |
| 42 | u8 (*triplet)(struct udevice *dev, bool bdir); | |
| 43 | void (*write_byte)(struct udevice *dev, u8 byte); | |
| 44 | }; | |
| 45 | ||
| 46 | int w1_get_bus(int busnum, struct udevice **busp); | |
| 47 | u8 w1_get_device_family(struct udevice *dev); | |
| 48 | ||
| 49 | int w1_read_buf(struct udevice *dev, u8 *buf, unsigned int count); | |
| 50 | int w1_read_byte(struct udevice *dev); | |
| 51 | int w1_reset_select(struct udevice *dev); | |
| 52 | int w1_write_buf(struct udevice *dev, u8 *buf, unsigned int count); | |
| 53 | int w1_write_byte(struct udevice *dev, u8 byte); | |
| 54 | ||
| 55 | #endif |