xref: /openbmc/u-boot/include/w1.h (revision 33a6c8d4)
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 
11 #include <dm.h>
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 
18 struct w1_device {
19 	u64	id;
20 };
21 
22 struct w1_ops {
23 	u8	(*read_byte)(struct udevice *dev);
24 	bool	(*reset)(struct udevice *dev);
25 	u8	(*triplet)(struct udevice *dev, bool bdir);
26 	void	(*write_byte)(struct udevice *dev, u8 byte);
27 };
28 
29 int w1_get_bus(int busnum, struct udevice **busp);
30 u8 w1_get_device_family(struct udevice *dev);
31 
32 int w1_read_buf(struct udevice *dev, u8 *buf, unsigned int count);
33 int w1_read_byte(struct udevice *dev);
34 int w1_reset_select(struct udevice *dev);
35 int w1_write_buf(struct udevice *dev, u8 *buf, unsigned int count);
36 int w1_write_byte(struct udevice *dev, u8 byte);
37 
38 #endif
39