aboutsummaryrefslogtreecommitdiff
path: root/drivers/w1/w1.h
blob: 90a2e737d2ca4ab528a2f07ca6a369a2e5ce2486 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 *	w1.h
 *
 * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef __W1_H
#define __W1_H

struct w1_reg_num
{
#if defined(__LITTLE_ENDIAN_BITFIELD)
  	__u64	family:8,
  		id:48,
  		crc:8;
#elif defined(__BIG_ENDIAN_BITFIELD)
	__u64	crc:8,
		id:48,
		family:8;
#else
#error "Please fix <asm/byteorder.h>"
#endif
};

#ifdef __KERNEL__

#include <linux/completion.h>
#include <linux/device.h>

#include <net/sock.h>

#include <asm/semaphore.h>

#include "w1_family.h"

#define W1_MAXNAMELEN		32
#define W1_SLAVE_DATA_SIZE	128

#define W1_SEARCH		0xF0
#define W1_CONDITIONAL_SEARCH	0xEC
#define W1_CONVERT_TEMP		0x44
#define W1_SKIP_ROM		0xCC
#define W1_READ_SCRATCHPAD	0xBE
#define W1_READ_ROM		0x33
#define W1_READ_PSUPPLY		0xB4
#define W1_MATCH_ROM		0x55

#define W1_SLAVE_ACTIVE		(1<<0)

struct w1_slave
{
	struct module		*owner;
	unsigned char		name[W1_MAXNAMELEN];
	struct list_head	w1_slave_entry;
	struct w1_reg_num	reg_num;
	atomic_t		refcnt;
	u8			rom[9];
	u32			flags;
	int			ttl;

	struct w1_master	*master;
	struct w1_family	*family;
	struct device		dev;
	struct completion	dev_released;

	struct bin_attribute	attr_bin;
	struct device_attribute	attr_name, attr_val;
};

typedef void (* w1_slave_found_callback)(unsigned long, u64);

struct w1_bus_master
{
	unsigned long		data;

	u8			(*read_bit)(unsigned long);
	void			(*write_bit)(unsigned long, u8);

	u8			(*read_byte)(unsigned long);
	void			(*write_byte)(unsigned long, u8);

	u8			(*read_block)(unsigned long, u8 *, int);
	void			(*write_block)(unsigned long, u8 *, int);

	u8			(*touch_bit)(unsigned long, u8);

	u8			(*reset_bus)(unsigned long);

	void			(*search)(unsigned long, w1_slave_found_callback);
};

struct w1_master
{
	struct list_head	w1_master_entry;
	struct module		*owner;
	unsigned char		name[W1_MAXNAMELEN];
	struct list_head	slist;
	int			max_slave_count, slave_count;
	unsigned long		attempts;
	int			slave_ttl;
	int			initialized;
	u32			id;

	atomic_t		refcnt;

	void			*priv;
	int			priv_size;

	int			need_exit;
	pid_t			kpid;
	struct semaphore	mutex;

	struct device_driver	*driver;
	struct device		dev;
	struct completion	dev_released;
	struct completion	dev_exited;

	struct w1_bus_master	*bus_master;

	u32			seq, groups;
	struct sock		*nls;
};

int w1_create_master_attributes(struct w1_master *);
void w1_search(struct w1_master *dev);

#endif /* __KERNEL__ */

#endif /* __W1_H */