173 lines
4.6 KiB
C
173 lines
4.6 KiB
C
/* $NetBSD: dcm.c,v 1.8 1995/10/04 06:54:45 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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* @(#)dcm.c 8.1 (Berkeley) 6/10/93
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*/
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#ifdef DCMCONSOLE
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#include <sys/param.h>
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#include <dev/cons.h>
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#include <hp300/dev/device.h>
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#include <hp300/dev/dcmreg.h>
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#include <hp300/stand/consdefs.h>
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#include <hp300/stand/samachdep.h>
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struct dcmdevice *dcmcnaddr = NULL;
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void
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dcmprobe(cp)
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struct consdev *cp;
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{
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extern struct hp_hw sc_table[];
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register struct hp_hw *hw;
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register struct dcmdevice *dcm;
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for (hw = sc_table; hw < &sc_table[MAXCTLRS]; hw++)
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if (HW_ISDEV(hw, D_COMMDCM) && !badaddr((caddr_t)hw->hw_kva))
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break;
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if (!HW_ISDEV(hw, D_COMMDCM)) {
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cp->cn_pri = CN_DEAD;
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return;
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}
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dcmcnaddr = (struct dcmdevice *) hw->hw_kva;
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dcm = dcmcnaddr;
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switch (dcm->dcm_rsid) {
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case DCMID:
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cp->cn_pri = CN_NORMAL;
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break;
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case DCMID|DCMCON:
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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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curcons_scode = hw->hw_sc;
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}
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void
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dcminit(cp)
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struct consdev *cp;
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{
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register struct dcmdevice *dcm = dcmcnaddr;
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register int port = CONUNIT;
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dcm->dcm_ic = IC_ID;
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while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr)
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;
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dcm->dcm_data[port].dcm_baud = BR_9600;
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dcm->dcm_data[port].dcm_conf = LC_8BITS | LC_1STOP;
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SEM_LOCK(dcm);
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dcm->dcm_cmdtab[port].dcm_data |= CT_CON;
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dcm->dcm_cr |= (1 << port);
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SEM_UNLOCK(dcm);
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DELAY(15000);
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}
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/* ARGSUSED */
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#ifndef SMALL
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int
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dcmgetchar(dev)
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dev_t dev;
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{
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register struct dcmdevice *dcm = dcmcnaddr;
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register struct dcmrfifo *fifo;
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register struct dcmpreg *pp;
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register unsigned head;
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int c, stat, port;
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port = CONUNIT;
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pp = dcm_preg(dcm, port);
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head = pp->r_head & RX_MASK;
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if (head == (pp->r_tail & RX_MASK))
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return(0);
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fifo = &dcm->dcm_rfifos[3-port][head>>1];
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c = fifo->data_char;
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stat = fifo->data_stat;
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pp->r_head = (head + 2) & RX_MASK;
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SEM_LOCK(dcm);
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stat = dcm->dcm_iir;
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SEM_UNLOCK(dcm);
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return(c);
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}
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#else
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int
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dcmgetchar(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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dcmputchar(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 dcmdevice *dcm = dcmcnaddr;
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register struct dcmpreg *pp;
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register int timo;
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unsigned tail;
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int port, stat;
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port = CONUNIT;
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pp = dcm_preg(dcm, port);
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tail = pp->t_tail & TX_MASK;
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timo = 50000;
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while (tail != (pp->t_head & TX_MASK) && --timo)
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;
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dcm->dcm_tfifos[3-port][tail].data_char = c;
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pp->t_tail = tail = (tail + 1) & TX_MASK;
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SEM_LOCK(dcm);
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dcm->dcm_cmdtab[port].dcm_data |= CT_TX;
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dcm->dcm_cr |= (1 << port);
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SEM_UNLOCK(dcm);
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timo = 1000000;
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while (tail != (pp->t_head & TX_MASK) && --timo)
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;
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SEM_LOCK(dcm);
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stat = dcm->dcm_iir;
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SEM_UNLOCK(dcm);
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}
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#endif
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