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pckbd_encode.c revision 1.4 
      1 /*	$NetBSD: pckbd_encode.c,v 1.4 2005/12/11 12:21:22 christos 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 1.4 2005/12/11 12:21:22 christos 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 */
     77