152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/* $NetBSD: dca.c,v 1.8 1995/10/04 06:54:44 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1988 University of Utah.
|
|
* Copyright (c) 1990, 1993
|
|
* 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.
|
|
*
|
|
* @(#)dca.c 8.1 (Berkeley) 6/10/93
|
|
*/
|
|
|
|
#ifdef DCACONSOLE
|
|
#include <sys/param.h>
|
|
#include <dev/cons.h>
|
|
|
|
#include <hp300/dev/dcareg.h>
|
|
#include <hp300/stand/consdefs.h>
|
|
#include <hp300/stand/samachdep.h>
|
|
|
|
/* If not using 4.4 devs */
|
|
#ifndef dca_reset
|
|
#define dca_id dca_irid
|
|
#define dca_reset dca_id
|
|
#endif
|
|
|
|
struct dcadevice *dcacnaddr = 0;
|
|
|
|
void
|
|
dcaprobe(cp)
|
|
struct consdev *cp;
|
|
{
|
|
register struct dcadevice *dca;
|
|
|
|
dcacnaddr = (struct dcadevice *) sctoaddr(CONSCODE);
|
|
if (badaddr((char *)dcacnaddr)) {
|
|
cp->cn_pri = CN_DEAD;
|
|
return;
|
|
}
|
|
#ifdef FORCEDCACONSOLE
|
|
cp->cn_pri = CN_REMOTE;
|
|
#else
|
|
dca = dcacnaddr;
|
|
switch (dca->dca_id) {
|
|
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;
|
|
}
|
|
|
|
#endif
|
|
curcons_scode = CONSCODE;
|
|
}
|
|
|
|
void
|
|
dcainit(cp)
|
|
struct consdev *cp;
|
|
{
|
|
register struct dcadevice *dca = dcacnaddr;
|
|
|
|
dca->dca_reset = 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;
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
#ifndef SMALL
|
|
int
|
|
dcagetchar(dev)
|
|
dev_t dev;
|
|
{
|
|
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
|
|
int
|
|
dcagetchar(dev)
|
|
dev_t dev;
|
|
{
|
|
return(0);
|
|
}
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
void
|
|
dcaputchar(dev, c)
|
|
dev_t dev;
|
|
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
|