158 lines
4.0 KiB
C
158 lines
4.0 KiB
C
/* $NetBSD: dca.c,v 1.1 1997/02/04 03:52:20 thorpej Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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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* @(#)dca.c 8.1 (Berkeley) 6/10/93
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*/
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#ifdef DCACONSOLE
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#include <sys/param.h>
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#include <dev/cons.h>
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#include <hp300/dev/dcareg.h>
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#include <hp300/stand/common/consdefs.h>
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#include <hp300/stand/common/samachdep.h>
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/* If not using 4.4 devs */
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#ifndef dca_reset
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#define dca_id dca_irid
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#define dca_reset dca_id
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#endif
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struct dcadevice *dcacnaddr = 0;
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#define DCACONSCODE 9 /* XXX */
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void
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dcaprobe(cp)
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struct consdev *cp;
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{
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register struct dcadevice *dca;
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dcacnaddr = (struct dcadevice *) sctoaddr(DCACONSCODE);
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if (badaddr((char *)dcacnaddr)) {
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cp->cn_pri = CN_DEAD;
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return;
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}
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#ifdef FORCEDCACONSOLE
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cp->cn_pri = CN_REMOTE;
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#else
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dca = dcacnaddr;
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switch (dca->dca_id) {
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case DCAID0:
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case DCAID1:
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cp->cn_pri = CN_NORMAL;
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break;
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case DCAREMID0:
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case DCAREMID1:
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cp->cn_pri = CN_REMOTE;
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break;
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default:
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cp->cn_pri = CN_DEAD;
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break;
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}
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#endif
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curcons_scode = DCACONSCODE;
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}
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void
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dcainit(cp)
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struct consdev *cp;
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{
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register struct dcadevice *dca = dcacnaddr;
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dca->dca_reset = 0xFF;
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DELAY(100);
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dca->dca_ic = 0;
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dca->dca_cfcr = CFCR_DLAB;
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dca->dca_data = DCABRD(9600) & 0xFF;
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dca->dca_ier = DCABRD(9600) >> 8;
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dca->dca_cfcr = CFCR_8BITS;
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dca->dca_fifo =
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FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1;
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dca->dca_mcr = MCR_DTR | MCR_RTS;
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}
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/* ARGSUSED */
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#ifndef SMALL
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int
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dcagetchar(dev)
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dev_t dev;
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{
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register struct dcadevice *dca = dcacnaddr;
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short stat;
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int c;
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if (((stat = dca->dca_lsr) & LSR_RXRDY) == 0)
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return(0);
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c = dca->dca_data;
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return(c);
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}
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#else
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int
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dcagetchar(dev)
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dev_t dev;
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{
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return(0);
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}
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#endif
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/* ARGSUSED */
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void
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dcaputchar(dev, c)
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dev_t dev;
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register int c;
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{
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register struct dcadevice *dca = dcacnaddr;
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register int timo;
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short stat;
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/* wait a reasonable time for the transmitter to come ready */
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timo = 50000;
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while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
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;
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dca->dca_data = c;
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/* wait for this transmission to complete */
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timo = 1000000;
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while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
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;
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}
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#endif
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