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- /*
- * 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.
- *
- * @(#)dcm.c 7.3 (Berkeley) 5/7/91
- */
-
- #ifdef DCMCONSOLE
- #include "sys/param.h"
- #include "../hp300/cons.h"
- #include "../dev/device.h"
- #include "../dev/dcmreg.h"
-
- struct dcmdevice *dcmcnaddr = NULL;
-
- dcmprobe(cp)
- struct consdev *cp;
- {
- extern struct hp_hw sc_table[];
- register struct hp_hw *hw;
- register struct dcmdevice *dcm;
-
- for (hw = sc_table; hw < &sc_table[MAXCTLRS]; hw++)
- if (HW_ISDEV(hw, D_COMMDCM) && !badaddr((caddr_t)hw->hw_kva))
- break;
- if (!HW_ISDEV(hw, D_COMMDCM)) {
- cp->cn_pri = CN_DEAD;
- return;
- }
- dcmcnaddr = (struct dcmdevice *) hw->hw_kva;
-
- dcm = dcmcnaddr;
- switch (dcm->dcm_rsid) {
- case DCMID:
- cp->cn_pri = CN_NORMAL;
- break;
- case DCMID|DCMCON:
- cp->cn_pri = CN_REMOTE;
- break;
- default:
- cp->cn_pri = CN_DEAD;
- break;
- }
- }
-
- dcminit(cp)
- struct consdev *cp;
- {
- register struct dcmdevice *dcm = dcmcnaddr;
- register int port = CONUNIT;
-
- dcm->dcm_ic = IC_ID;
- while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr)
- ;
- dcm->dcm_data[port].dcm_baud = BR_9600;
- dcm->dcm_data[port].dcm_conf = LC_8BITS | LC_1STOP;
- SEM_LOCK(dcm);
- dcm->dcm_cmdtab[port].dcm_data |= CT_CON;
- dcm->dcm_cr |= (1 << port);
- SEM_UNLOCK(dcm);
- DELAY(15000);
- }
-
- #ifndef SMALL
- dcmgetchar()
- {
- register struct dcmdevice *dcm = dcmcnaddr;
- register struct dcmrfifo *fifo;
- register struct dcmpreg *pp;
- register unsigned head;
- int c, stat, port;
-
- port = CONUNIT;
- pp = dcm_preg(dcm, port);
- head = pp->r_head & RX_MASK;
- if (head == (pp->r_tail & RX_MASK))
- return(0);
- fifo = &dcm->dcm_rfifos[3-port][head>>1];
- c = fifo->data_char;
- stat = fifo->data_stat;
- pp->r_head = (head + 2) & RX_MASK;
- SEM_LOCK(dcm);
- stat = dcm->dcm_iir;
- SEM_UNLOCK(dcm);
- return(c);
- }
- #else
- dcmgetchar()
- {
- return(0);
- }
- #endif
-
- dcmputchar(c)
- register int c;
- {
- register struct dcmdevice *dcm = dcmcnaddr;
- register struct dcmpreg *pp;
- register int timo;
- unsigned tail;
- int port, stat;
-
- port = CONUNIT;
- pp = dcm_preg(dcm, port);
- tail = pp->t_tail & TX_MASK;
- timo = 50000;
- while (tail != (pp->t_head & TX_MASK) && --timo)
- ;
- dcm->dcm_tfifos[3-port][tail].data_char = c;
- pp->t_tail = tail = (tail + 1) & TX_MASK;
- SEM_LOCK(dcm);
- dcm->dcm_cmdtab[port].dcm_data |= CT_TX;
- dcm->dcm_cr |= (1 << port);
- SEM_UNLOCK(dcm);
- timo = 1000000;
- while (tail != (pp->t_head & TX_MASK) && --timo)
- ;
- SEM_LOCK(dcm);
- stat = dcm->dcm_iir;
- SEM_UNLOCK(dcm);
- }
- #endif
-