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/* $OpenBSD: dca.c,v 1.1 1997/07/14 08:14:10 downsj Exp $ */
/* $NetBSD: dca.c,v 1.10 1996/10/06 01:42:48 mycroft 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 "consdefs.h"
#include "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;
#define DCACONSCODE 9 /* XXX */
void
dcaprobe(cp)
struct consdev *cp;
{
register struct dcadevice *dca;
dcacnaddr = (struct dcadevice *) sctoaddr(DCACONSCODE);
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 = DCACONSCODE;
}
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;
dca->dca_fifo =
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1;
dca->dca_mcr = MCR_DTR | MCR_RTS;
}
/* 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
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