home *** CD-ROM | disk | FTP | other *** search
- /*
- * 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.
- *
- * @(#)dca.c 7.3 (Berkeley) 5/7/91
- */
-
- #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
-