138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
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/*
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* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* kbd.c
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*/
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#include "ite.h"
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#if NITE > 0
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#include "sys/param.h"
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#include "sys/systm.h"
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#include "sys/ioctl.h"
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#include "sys/tty.h"
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#include "sys/proc.h"
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#include "sys/conf.h"
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#include "sys/file.h"
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#include "sys/uio.h"
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#include "sys/kernel.h"
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#include "sys/syslog.h"
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#include "device.h"
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#include "kbdreg.h"
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#include "itevar.h"
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#include "machine/cpu.h"
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#include "../amiga/custom.h"
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#include "../amiga/cia.h"
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void
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kbdenable ()
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{
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int s = spltty();
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/* collides with external ints from SCSI, watch out for this when
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enabling/disabling interrupts there !! */
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custom.intena = INTF_SETCLR | INTF_PORTS;
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ciaa.icr = (1<<7) | (1<<3); /* SP interrupt enable */
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ciaa.cra &= ~(1<<6); /* serial line == input */
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splx (s);
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}
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int
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kbdintr ()
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{
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/* THIS CLEARS ALL INTERRUPTS FROM CIAA! Will need a special cia
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interrupt handler to be able to use the ciaa timers besides driving
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the keyboard !! */
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u_char ints = ciaa.icr;
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u_char c, in;
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if (! (ints & (1<<3)))
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return 0;
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in = ciaa.sdr;
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/* ack */
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ciaa.cra |= (1 << 6); /* serial line output */
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/* wait 85 microseconds */
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DELAY(85);
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ciaa.cra &= ~(1 << 6);
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c = ~in; /* keyboard data is inverted */
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/* process the character.
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Should implement RAW mode for X11 later here !! */
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c = (c >> 1) | (c << 7); /* rotate right once */
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itefilter (c, ITEFILT_TTY);
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}
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int
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kbdbell()
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{
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/* not yet.. */
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}
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int
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kbdgetcn ()
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{
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int s = spltty ();
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u_char ints, c, in;
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/* this is very very nasty... */
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while (! (ciaa.icr & (1<<3))) ;
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in = ciaa.sdr;
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c = ~in;
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/* ack */
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ciaa.cra |= (1 << 6); /* serial line output */
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ciaa.sdr = 0xff; /* ack */
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/* wait 85 microseconds */
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DELAY(85); /* XXXX only works as long as DELAY doesn't use a timer and waits.. */
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ciaa.cra &= ~(1 << 6);
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ciaa.sdr = in;
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splx (s);
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c = (c >> 1) | (c << 7);
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return c;
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}
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#endif
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