NetBSD/sys/arch/hp300/stand/dca.c

127 lines
3.5 KiB
C

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
*
* from: @(#)dca.c 7.3 (Berkeley) 5/7/91
* $Id: dca.c,v 1.2 1993/05/22 07:58:50 cgd Exp $
*/
#ifdef DCACONSOLE
#include "sys/param.h"
#include "../dev/dcareg.h"
#include "../include/cpu.h"
#include "../hp300/cons.h"
struct dcadevice *dcacnaddr = 0;
dcaprobe(cp)
struct consdev *cp;
{
register struct dcadevice *dca;
dcacnaddr = (struct dcadevice *) sctoaddr(CONSCODE);
if (badaddr((char *)dcacnaddr)) {
cp->cn_pri = CN_DEAD;
return;
}
dca = dcacnaddr;
switch (dca->dca_irid) {
case DCAID0:
case DCAID1:
cp->cn_pri = CN_NORMAL;
break;
case DCAREMID0:
case DCAREMID1:
cp->cn_pri = CN_REMOTE;
break;
default:
cp->cn_pri = CN_DEAD;
break;
}
}
dcainit(cp)
struct consdev *cp;
{
register struct dcadevice *dca = dcacnaddr;
dca->dca_irid = 0xFF;
DELAY(100);
dca->dca_ic = 0;
dca->dca_cfcr = CFCR_DLAB;
dca->dca_data = DCABRD(9600) & 0xFF;
dca->dca_ier = DCABRD(9600) >> 8;
dca->dca_cfcr = CFCR_8BITS;
}
#ifndef SMALL
dcagetchar()
{
register struct dcadevice *dca = dcacnaddr;
short stat;
int c;
if (((stat = dca->dca_lsr) & LSR_RXRDY) == 0)
return(0);
c = dca->dca_data;
return(c);
}
#else
dcagetchar()
{
return(0);
}
#endif
dcaputchar(c)
register int c;
{
register struct dcadevice *dca = dcacnaddr;
register int timo;
short stat;
/* wait a reasonable time for the transmitter to come ready */
timo = 50000;
while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
;
dca->dca_data = c;
/* wait for this transmission to complete */
timo = 1000000;
while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
;
}
#endif