sys/arch/landisk/include/button.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2003 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #ifndef _MACHINE_BUTTON_H_
  39 #define _MACHINE_BUTTON_H_
  40
  41 #include <sys/ioccom.h>
  42
  43 #define BUTTON_EVENT_PRESSED    0       /* button pressed */
  44 #define BUTTON_EVENT_RELEASED   1       /* button released */
  45
  46 #define BUTTON_STATE_PRESSED    0       /* button pressed */
  47 #define BUTTON_STATE_RELEASED   1       /* button released */
  48 #define BUTTON_STATE_UNKNOWN    -1
  49
  50 /*
  51  * This structure describes the state of a button.  It is used
  52  * by the BUTTON_IOC_GET_SWSTATE ioctl, as well as in button
  53  * event messages.
  54  */
  55 struct button_state {
  56         char    bs_name[32];            /* button name */
  57         int32_t bs_state;               /* state of the switch/event */
  58 };
  59
  60 /*
  61  * button event messages:
  62  *
  63  * We ensure that a message is always exactly 32 bytes long, so that
  64  * userland doesn't need to issue multiple reads to get a single event.
  65  */
  66 #define BUTTON_EVENT_MSG_SIZE   32
  67
  68 #define BUTTON_EVENT_STATE_CHANGE               0
  69
  70 typedef struct {
  71         int32_t         bev_type;       /* button event type */
  72         union {
  73                 int32_t _bev_d_space[(BUTTON_EVENT_MSG_SIZE /
  74                                       sizeof(int32_t)) - 1];
  75
  76                 /*
  77                  * This field is used for:
  78                  *
  79                  *      BUTTON_EVENT_STATE_CHANGE
  80                  */
  81                 struct button_state _bev_d_event;
  82         } _bev_data;
  83 } button_event_t;
  84
  85 #define bev_event       _bev_data._bev_d_event
  86
  87 /*
  88  * BUTTON_IOC_GET_TYPE:
  89  *
  90  *      Get the button back-end type.
  91  */
  92 struct button_type {
  93         char    button_type[32];
  94 };
  95 #define BUTTON_IOC_GET_TYPE      _IOR('P', 1, sizeof(struct button_type))
  96
  97 #endif /* _MACHINE_BUTTON_H_ */