1 | /* SPDX-License-Identifier: LGPL-2.0+ WITH Linux-syscall-note */ |
2 | /* |
3 | * userio: virtual serio device support |
4 | * Copyright (C) 2015 Red Hat |
5 | * Copyright (C) 2015 Lyude (Stephen Chandler Paul) <cpaul@redhat.com> |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it |
8 | * under the terms of the GNU Lesser General Public License as published by the |
9 | * Free Software Foundation; either version 2 of the License, or (at your |
10 | * option) any later version. |
11 | * |
12 | * This program is distributed in the hope that it will be useful, but WITHOUT |
13 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
14 | * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
15 | * details. |
16 | * |
17 | * This is the public header used for user-space communication with the userio |
18 | * driver. __attribute__((__packed__)) is used for all structs to keep ABI |
19 | * compatibility between all architectures. |
20 | */ |
21 | |
22 | #ifndef _USERIO_H |
23 | #define _USERIO_H |
24 | |
25 | #include <linux/types.h> |
26 | |
27 | enum userio_cmd_type { |
28 | USERIO_CMD_REGISTER = 0, |
29 | USERIO_CMD_SET_PORT_TYPE = 1, |
30 | USERIO_CMD_SEND_INTERRUPT = 2 |
31 | }; |
32 | |
33 | /* |
34 | * userio Commands |
35 | * All commands sent to /dev/userio are encoded using this structure. The type |
36 | * field should contain a USERIO_CMD* value that indicates what kind of command |
37 | * is being sent to userio. The data field should contain the accompanying |
38 | * argument for the command, if there is one. |
39 | */ |
40 | struct userio_cmd { |
41 | __u8 type; |
42 | __u8 data; |
43 | } __attribute__((__packed__)); |
44 | |
45 | #endif /* !_USERIO_H */ |
46 | |