HID: uhid: implement feature requests
[linux-2.6.git] / include / linux / uhid.h
1 #ifndef __UHID_H_
2 #define __UHID_H_
3
4 /*
5  * User-space I/O driver support for HID subsystem
6  * Copyright (c) 2012 David Herrmann
7  */
8
9 /*
10  * This program is free software; you can redistribute it and/or modify it
11  * under the terms of the GNU General Public License as published by the Free
12  * Software Foundation; either version 2 of the License, or (at your option)
13  * any later version.
14  */
15
16 /*
17  * Public header for user-space communication. We try to keep every structure
18  * aligned but to be safe we also use __attribute__((__packed__)). Therefore,
19  * the communication should be ABI compatible even between architectures.
20  */
21
22 #include <linux/input.h>
23 #include <linux/types.h>
24
25 enum uhid_event_type {
26         UHID_CREATE,
27         UHID_DESTROY,
28         UHID_START,
29         UHID_STOP,
30         UHID_OPEN,
31         UHID_CLOSE,
32         UHID_OUTPUT,
33         UHID_OUTPUT_EV,
34         UHID_INPUT,
35         UHID_FEATURE,
36         UHID_FEATURE_ANSWER,
37 };
38
39 struct uhid_create_req {
40         __u8 name[128];
41         __u8 phys[64];
42         __u8 uniq[64];
43         __u8 __user *rd_data;
44         __u16 rd_size;
45
46         __u16 bus;
47         __u32 vendor;
48         __u32 product;
49         __u32 version;
50         __u32 country;
51 } __attribute__((__packed__));
52
53 #define UHID_DATA_MAX 4096
54
55 enum uhid_report_type {
56         UHID_FEATURE_REPORT,
57         UHID_OUTPUT_REPORT,
58         UHID_INPUT_REPORT,
59 };
60
61 struct uhid_input_req {
62         __u8 data[UHID_DATA_MAX];
63         __u16 size;
64 } __attribute__((__packed__));
65
66 struct uhid_output_req {
67         __u8 data[UHID_DATA_MAX];
68         __u16 size;
69         __u8 rtype;
70 } __attribute__((__packed__));
71
72 struct uhid_output_ev_req {
73         __u16 type;
74         __u16 code;
75         __s32 value;
76 } __attribute__((__packed__));
77
78 struct uhid_feature_req {
79         __u32 id;
80         __u8 rnum;
81         __u8 rtype;
82 } __attribute__((__packed__));
83
84 struct uhid_feature_answer_req {
85         __u32 id;
86         __u16 err;
87         __u16 size;
88         __u8 data[UHID_DATA_MAX];
89 };
90
91 struct uhid_event {
92         __u32 type;
93
94         union {
95                 struct uhid_create_req create;
96                 struct uhid_input_req input;
97                 struct uhid_output_req output;
98                 struct uhid_output_ev_req output_ev;
99                 struct uhid_feature_req feature;
100                 struct uhid_feature_answer_req feature_answer;
101         } u;
102 } __attribute__((__packed__));
103
104 #endif /* __UHID_H_ */