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5523662e SCP |
1 | /* |
2 | * userio: virtual serio device support | |
3 | * Copyright (C) 2015 Red Hat | |
4 | * Copyright (C) 2015 Lyude (Stephen Chandler Paul) <cpaul@redhat.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU Lesser General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
13 | * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more | |
14 | * details. | |
15 | * | |
16 | * This is the public header used for user-space communication with the userio | |
17 | * driver. __attribute__((__packed__)) is used for all structs to keep ABI | |
18 | * compatibility between all architectures. | |
19 | */ | |
20 | ||
21 | #ifndef _USERIO_H | |
22 | #define _USERIO_H | |
23 | ||
24 | #include <linux/types.h> | |
25 | ||
26 | enum userio_cmd_type { | |
27 | USERIO_CMD_REGISTER = 0, | |
28 | USERIO_CMD_SET_PORT_TYPE = 1, | |
29 | USERIO_CMD_SEND_INTERRUPT = 2 | |
30 | }; | |
31 | ||
32 | /* | |
33 | * userio Commands | |
34 | * All commands sent to /dev/userio are encoded using this structure. The type | |
35 | * field should contain a USERIO_CMD* value that indicates what kind of command | |
36 | * is being sent to userio. The data field should contain the accompanying | |
37 | * argument for the command, if there is one. | |
38 | */ | |
39 | struct userio_cmd { | |
40 | __u8 type; | |
41 | __u8 data; | |
42 | } __attribute__((__packed__)); | |
43 | ||
44 | #endif /* !_USERIO_H */ |