xref: /openbmc/u-boot/include/w1.h (revision b6cba297)
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