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1 | /* |
2 | * User level driver support for input subsystem | |
3 | * | |
4 | * Heavily based on evdev.c by Vojtech Pavlik | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org> | |
21 | * | |
22 | * Changes/Revisions: | |
23 | * 0.3 24/05/2006 (Anssi Hannula <anssi.hannulagmail.com>) | |
24 | * - update ff support for the changes in kernel interface | |
25 | * - add UINPUT_VERSION | |
26 | * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>) | |
27 | * - added force feedback support | |
28 | * - added UI_SET_PHYS | |
29 | * 0.1 20/06/2002 | |
30 | * - first public version | |
31 | */ | |
32 | #ifndef _UAPI__UINPUT_H_ | |
33 | #define _UAPI__UINPUT_H_ | |
34 | ||
35 | #include <linux/types.h> | |
36 | #include <linux/input.h> | |
37 | ||
38 | #define UINPUT_VERSION 3 | |
39 | ||
40 | ||
41 | struct uinput_ff_upload { | |
42 | __u32 request_id; | |
43 | __s32 retval; | |
44 | struct ff_effect effect; | |
45 | struct ff_effect old; | |
46 | }; | |
47 | ||
48 | struct uinput_ff_erase { | |
49 | __u32 request_id; | |
50 | __s32 retval; | |
51 | __u32 effect_id; | |
52 | }; | |
53 | ||
54 | /* ioctl */ | |
55 | #define UINPUT_IOCTL_BASE 'U' | |
56 | #define UI_DEV_CREATE _IO(UINPUT_IOCTL_BASE, 1) | |
57 | #define UI_DEV_DESTROY _IO(UINPUT_IOCTL_BASE, 2) | |
58 | ||
59 | #define UI_SET_EVBIT _IOW(UINPUT_IOCTL_BASE, 100, int) | |
60 | #define UI_SET_KEYBIT _IOW(UINPUT_IOCTL_BASE, 101, int) | |
61 | #define UI_SET_RELBIT _IOW(UINPUT_IOCTL_BASE, 102, int) | |
62 | #define UI_SET_ABSBIT _IOW(UINPUT_IOCTL_BASE, 103, int) | |
63 | #define UI_SET_MSCBIT _IOW(UINPUT_IOCTL_BASE, 104, int) | |
64 | #define UI_SET_LEDBIT _IOW(UINPUT_IOCTL_BASE, 105, int) | |
65 | #define UI_SET_SNDBIT _IOW(UINPUT_IOCTL_BASE, 106, int) | |
66 | #define UI_SET_FFBIT _IOW(UINPUT_IOCTL_BASE, 107, int) | |
67 | #define UI_SET_PHYS _IOW(UINPUT_IOCTL_BASE, 108, char*) | |
68 | #define UI_SET_SWBIT _IOW(UINPUT_IOCTL_BASE, 109, int) | |
69 | #define UI_SET_PROPBIT _IOW(UINPUT_IOCTL_BASE, 110, int) | |
70 | ||
71 | #define UI_BEGIN_FF_UPLOAD _IOWR(UINPUT_IOCTL_BASE, 200, struct uinput_ff_upload) | |
72 | #define UI_END_FF_UPLOAD _IOW(UINPUT_IOCTL_BASE, 201, struct uinput_ff_upload) | |
73 | #define UI_BEGIN_FF_ERASE _IOWR(UINPUT_IOCTL_BASE, 202, struct uinput_ff_erase) | |
74 | #define UI_END_FF_ERASE _IOW(UINPUT_IOCTL_BASE, 203, struct uinput_ff_erase) | |
75 | ||
76 | /* | |
77 | * To write a force-feedback-capable driver, the upload_effect | |
78 | * and erase_effect callbacks in input_dev must be implemented. | |
79 | * The uinput driver will generate a fake input event when one of | |
80 | * these callbacks are invoked. The userspace code then uses | |
81 | * ioctls to retrieve additional parameters and send the return code. | |
82 | * The callback blocks until this return code is sent. | |
83 | * | |
84 | * The described callback mechanism is only used if ff_effects_max | |
85 | * is set. | |
86 | * | |
87 | * To implement upload_effect(): | |
88 | * 1. Wait for an event with type == EV_UINPUT and code == UI_FF_UPLOAD. | |
89 | * A request ID will be given in 'value'. | |
90 | * 2. Allocate a uinput_ff_upload struct, fill in request_id with | |
91 | * the 'value' from the EV_UINPUT event. | |
92 | * 3. Issue a UI_BEGIN_FF_UPLOAD ioctl, giving it the | |
93 | * uinput_ff_upload struct. It will be filled in with the | |
94 | * ff_effects passed to upload_effect(). | |
95 | * 4. Perform the effect upload, and place a return code back into | |
96 | the uinput_ff_upload struct. | |
97 | * 5. Issue a UI_END_FF_UPLOAD ioctl, also giving it the | |
98 | * uinput_ff_upload_effect struct. This will complete execution | |
99 | * of our upload_effect() handler. | |
100 | * | |
101 | * To implement erase_effect(): | |
102 | * 1. Wait for an event with type == EV_UINPUT and code == UI_FF_ERASE. | |
103 | * A request ID will be given in 'value'. | |
104 | * 2. Allocate a uinput_ff_erase struct, fill in request_id with | |
105 | * the 'value' from the EV_UINPUT event. | |
106 | * 3. Issue a UI_BEGIN_FF_ERASE ioctl, giving it the | |
107 | * uinput_ff_erase struct. It will be filled in with the | |
108 | * effect ID passed to erase_effect(). | |
109 | * 4. Perform the effect erasure, and place a return code back | |
110 | * into the uinput_ff_erase struct. | |
111 | * 5. Issue a UI_END_FF_ERASE ioctl, also giving it the | |
112 | * uinput_ff_erase_effect struct. This will complete execution | |
113 | * of our erase_effect() handler. | |
114 | */ | |
115 | ||
116 | /* | |
117 | * This is the new event type, used only by uinput. | |
118 | * 'code' is UI_FF_UPLOAD or UI_FF_ERASE, and 'value' | |
119 | * is the unique request ID. This number was picked | |
120 | * arbitrarily, above EV_MAX (since the input system | |
121 | * never sees it) but in the range of a 16-bit int. | |
122 | */ | |
123 | #define EV_UINPUT 0x0101 | |
124 | #define UI_FF_UPLOAD 1 | |
125 | #define UI_FF_ERASE 2 | |
126 | ||
127 | #define UINPUT_MAX_NAME_SIZE 80 | |
128 | struct uinput_user_dev { | |
129 | char name[UINPUT_MAX_NAME_SIZE]; | |
130 | struct input_id id; | |
131 | __u32 ff_effects_max; | |
132 | __s32 absmax[ABS_CNT]; | |
133 | __s32 absmin[ABS_CNT]; | |
134 | __s32 absfuzz[ABS_CNT]; | |
135 | __s32 absflat[ABS_CNT]; | |
136 | }; | |
137 | #endif /* _UAPI__UINPUT_H_ */ |