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
|
/*
* Axis and button map support functions.
* Copyright © 2009 Stephen Kitt <steve@sk2.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __AXBTNMAP_H__
#define __AXBTNMAP_H__
#include <stdint.h>
#include <linux/input.h>
/* The following values come from include/input.h in the kernel
source; the small variant is used up to version 2.6.27, the large
one from 2.6.28 onwards. We need to handle both values because the
kernel doesn't; it only expects one of the values, and we need to
determine which one at run-time. */
#define KEY_MAX_LARGE 0x2FF
#define KEY_MAX_SMALL 0x1FF
/* Axis map size. */
#define AXMAP_SIZE (ABS_MAX + 1)
/* Button map size. */
#define BTNMAP_SIZE (KEY_MAX_LARGE - BTN_MISC + 1)
/* Retrieves the current axis map in the given array, which must
contain at least AXMAP_SIZE elements. Returns the result of the
ioctl(): negative in case of an error, 0 otherwise for kernels up
to 2.6.30, the length of the array actually copied for later
kernels. */
int getaxmap(int fd, uint8_t *axmap);
/* Uses the given array as the axis map. The array must contain at
least AXMAP_SIZE elements. Returns the result of the ioctl():
negative in case of an error, 0 otherwise. */
int setaxmap(int fd, uint8_t *axmap);
/* Retrieves the current button map in the given array, which must
contain at least BTNMAP_SIZE elements. Returns the result of the
ioctl(): negative in case of an error, 0 otherwise for kernels up
to 2.6.30, the length of the array actually copied for later
kernels. */
int getbtnmap(int fd, uint16_t *btnmap);
/* Uses the given array as the button map. The array must contain at
least BTNMAP_SIZE elements. Returns the result of the ioctl():
negative in case of an error, 0 otherwise. */
int setbtnmap(int fd, uint16_t *btnmap);
#endif
|
