NetBSD/sys/arch/amiga/dev/kbd.c

143 lines
3.9 KiB
C

/*
* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: kbd.c,v 1.3 1993/09/02 18:08:06 mw Exp $
*/
#include "ite.h"
#if NITE > 0
#include "sys/param.h"
#include "sys/systm.h"
#include "sys/ioctl.h"
#include "sys/tty.h"
#include "sys/proc.h"
#include "sys/conf.h"
#include "sys/file.h"
#include "sys/uio.h"
#include "sys/kernel.h"
#include "sys/syslog.h"
#include "device.h"
#include "kbdreg.h"
#include "itevar.h"
#include "machine/cpu.h"
#include "../amiga/custom.h"
#include "../amiga/cia.h"
void
kbdenable ()
{
int s = spltty();
/* collides with external ints from SCSI, watch out for this when
enabling/disabling interrupts there !! */
custom.intena = INTF_SETCLR | INTF_PORTS;
ciaa.icr = CIA_ICR_IR_SC | CIA_ICR_SP; /* SP interrupt enable */
ciaa.cra &= ~(1<<6); /* serial line == input */
splx (s);
}
int
kbdintr (mask)
int mask;
{
u_char c, in;
/* now only invoked from generic CIA interrupt handler if there *is*
a keyboard interrupt pending */
in = ciaa.sdr;
/* ack */
ciaa.cra |= (1 << 6); /* serial line output */
/* wait 85 microseconds */
DELAY(85);
ciaa.cra &= ~(1 << 6);
c = ~in; /* keyboard data is inverted */
/* process the character.
Should implement RAW mode for X11 later here !! */
c = (c >> 1) | (c << 7); /* rotate right once */
itefilter (c, ITEFILT_TTY);
/* XXX THIS IS WRONG!!! The screenblanker should route thru ite.c, which
should call thru it's driver table, ie. we need a new driver-dependant
function for this feature! */
cc_unblank ();
}
int
kbdbell()
{
/* nice, mykes provided audio-support! */
cc_bell ();
}
int
kbdgetcn ()
{
int s = spltty ();
u_char ints, mask, c, in;
for (ints = 0; ! ((mask = ciaa.icr) & CIA_ICR_SP); ints |= mask) ;
in = ciaa.sdr;
c = ~in;
/* ack */
ciaa.cra |= (1 << 6); /* serial line output */
ciaa.sdr = 0xff; /* ack */
/* wait 85 microseconds */
DELAY(85); /* XXXX only works as long as DELAY doesn't use a timer and waits.. */
ciaa.cra &= ~(1 << 6);
ciaa.sdr = in;
splx (s);
c = (c >> 1) | (c << 7);
/* take care that no CIA-interrupts are lost */
if (mask)
dispatch_cia_ints (0, mask);
return c;
}
#endif