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
11struct udevice;
12
13#define W1_FAMILY_DS24B33	0x23
14#define W1_FAMILY_DS2431	0x2d
15#define W1_FAMILY_DS2502	0x09
16#define W1_FAMILY_EEP_SANDBOX	0xfe
17
18struct 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
35struct w1_device {
36	u64	id;
37};
38
39struct 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
46int w1_get_bus(int busnum, struct udevice **busp);
47u8 w1_get_device_family(struct udevice *dev);
48
49int w1_read_buf(struct udevice *dev, u8 *buf, unsigned int count);
50int w1_read_byte(struct udevice *dev);
51int w1_reset_select(struct udevice *dev);
52int w1_write_buf(struct udevice *dev, u8 *buf, unsigned int count);
53int w1_write_byte(struct udevice *dev, u8 byte);
54
55#endif
56