include/uapi/linux/userio.h

   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 */