cf93780656
a dca-specific constant. For now, hardwire standalone DCA console at select code 9 (which is what the old constant expanded to). Really should make the way the bootblock console is probed look just like how the kernel console is probed.
154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/* $NetBSD: dca.c,v 1.9 1996/02/26 21:51:25 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/consdefs.h>
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#include <hp300/stand/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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}
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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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