sys/dev/hpc/pckbd_encode.c

   1 /*      $NetBSD: pckbd_encode.c,v 1.2.16.3 2004/09/21 13:27:37 skrll Exp $      */
   2
   3 /*-
   4  * Copyright (c) 2000 TAKEMRUA, Shin All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by the PocketBSD project
  17  *      and its contributors.
  18  * 4. Neither the name of the project nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: pckbd_encode.c,v 1.2.16.3 2004/09/21 13:27:37 skrll Exp $");
  38
  39 #include "opt_wsdisplay_compat.h"
  40
  41 #ifdef WSDISPLAY_COMPAT_RAWKBD
  42 #include <sys/param.h>
  43 #include <dev/wscons/wsconsio.h>
  44 #include <dev/pckbport/pckbdreg.h>
  45 #include <dev/hpc/pckbd_encode.h>
  46
  47 /*
  48  * pckbd_encode() is inverse function of pckbd_decode() in dev/pckbc/pckbd.c.
  49  */
  50 int
  51 pckbd_encode(u_int type, int datain, u_char *dataout)
  52 {
  53         int res;
  54         u_char updown;
  55
  56         res = 0;
  57         updown = (type == WSCONS_EVENT_KEY_UP) ? 0x80 : 0;
  58
  59         /* 0x7f means BREAK key */
  60         if (datain == 0x7f) {
  61                 dataout[res++] = KBR_EXTENDED1;
  62                 dataout[res++] = (0x1d | updown);
  63                 datain = 0x45;
  64         }
  65
  66         /* extended keys */
  67         if (datain & 0x80) {
  68                 dataout[res++] = KBR_EXTENDED0;
  69                 datain &= 0x7f;
  70         }
  71
  72         dataout[res++] = (datain | updown);
  73
  74         return (res);
  75 }
  76 #endif /* WSDISPLAY_COMPAT_RAWKBD */