| Stephen Chandler Paul | 5523662e | 2015-10-24 13:10:29 -0700 | [diff] [blame] | 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 */ |