LXR linux/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
  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 */
  45