blob: 37d147f0a13a72c873931c9f2e7eaf0bdf87c3c8 [file] [log] [blame]
Stephen Chandler Paul5523662e2015-10-24 13:10:29 -07001/*
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
26enum 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 */
39struct userio_cmd {
40 __u8 type;
41 __u8 data;
42} __attribute__((__packed__));
43
44#endif /* !_USERIO_H */