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gerrit-public.fairphone.software / kernel / msm-4.9 / 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 / . / drivers / w1 / w1.h
blob: abbddaf3f8e287eb3329eb6c6b58360980103bf1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame^]1/*
2 * w1.h
3 *
4 * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef __W1_H
23#define __W1_H
24
25struct w1_reg_num
26{
27#if defined(__LITTLE_ENDIAN_BITFIELD)
28 __u64 family:8,
29 id:48,
30 crc:8;
31#elif defined(__BIG_ENDIAN_BITFIELD)
32 __u64 crc:8,
33 id:48,
34 family:8;
35#else
36#error "Please fix <asm/byteorder.h>"
37#endif
38};
39
40#ifdef __KERNEL__
41
42#include <linux/completion.h>
43#include <linux/device.h>
44
45#include <net/sock.h>
46
47#include <asm/semaphore.h>
48
49#include "w1_family.h"
50
51#define W1_MAXNAMELEN 32
52#define W1_SLAVE_DATA_SIZE 128
53
54#define W1_SEARCH 0xF0
55#define W1_CONDITIONAL_SEARCH 0xEC
56#define W1_CONVERT_TEMP 0x44
57#define W1_SKIP_ROM 0xCC
58#define W1_READ_SCRATCHPAD 0xBE
59#define W1_READ_ROM 0x33
60#define W1_READ_PSUPPLY 0xB4
61#define W1_MATCH_ROM 0x55
62
63#define W1_SLAVE_ACTIVE (1<<0)
64
65struct w1_slave
66{
67 struct module *owner;
68 unsigned char name[W1_MAXNAMELEN];
69 struct list_head w1_slave_entry;
70 struct w1_reg_num reg_num;
71 atomic_t refcnt;
72 u8 rom[9];
73 u32 flags;
74 int ttl;
75
76 struct w1_master *master;
77 struct w1_family *family;
78 struct device dev;
79 struct completion dev_released;
80
81 struct bin_attribute attr_bin;
82 struct device_attribute attr_name, attr_val;
83};
84
85typedef void (* w1_slave_found_callback)(unsigned long, u64);
86
87struct w1_bus_master
88{
89 unsigned long data;
90
91 u8 (*read_bit)(unsigned long);
92 void (*write_bit)(unsigned long, u8);
93
94 u8 (*read_byte)(unsigned long);
95 void (*write_byte)(unsigned long, u8);
96
97 u8 (*read_block)(unsigned long, u8 *, int);
98 void (*write_block)(unsigned long, u8 *, int);
99
100 u8 (*touch_bit)(unsigned long, u8);
101
102 u8 (*reset_bus)(unsigned long);
103
104 void (*search)(unsigned long, w1_slave_found_callback);
105};
106
107struct w1_master
108{
109 struct list_head w1_master_entry;
110 struct module *owner;
111 unsigned char name[W1_MAXNAMELEN];
112 struct list_head slist;
113 int max_slave_count, slave_count;
114 unsigned long attempts;
115 int slave_ttl;
116 int initialized;
117 u32 id;
118
119 atomic_t refcnt;
120
121 void *priv;
122 int priv_size;
123
124 int need_exit;
125 pid_t kpid;
126 struct semaphore mutex;
127
128 struct device_driver *driver;
129 struct device dev;
130 struct completion dev_released;
131 struct completion dev_exited;
132
133 struct w1_bus_master *bus_master;
134
135 u32 seq, groups;
136 struct sock *nls;
137};
138
139int w1_create_master_attributes(struct w1_master *);
140void w1_destroy_master_attributes(struct w1_master *);
141void w1_search(struct w1_master *dev);
142
143#endif /* __KERNEL__ */
144
145#endif /* __W1_H */