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/* $OpenBSD: dcm.c,v 1.5 1997/04/16 11:56:37 downsj Exp $ */
/* $NetBSD: dcm.c,v 1.2 1997/04/14 05:58:32 scottr Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990, 1993
* 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 8.1 (Berkeley) 6/10/93
*/
#ifdef DCMCONSOLE
#include <sys/param.h>
#include <dev/cons.h>
#include <hp300/dev/dcmreg.h>
#include <hp300/stand/consdefs.h>
#include <hp300/stand/samachdep.h>
#include <hp300/stand/device.h>
struct dcmdevice *dcmcnaddr = NULL;
#define DCMCONUNIT 1 /* XXX */
void
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;
#ifdef FORCEDCMCONSOLE
cp->cn_pri = CN_REMOTE;
#else
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;
}
curcons_scode = hw->hw_sc;
#endif
}
void
dcminit(cp)
struct consdev *cp;
{
register struct dcmdevice *dcm = dcmcnaddr;
register int port = DCMCONUNIT;
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);
}
/* ARGSUSED */
#ifndef SMALL
int
dcmgetchar(dev)
dev_t dev;
{
register struct dcmdevice *dcm = dcmcnaddr;
register struct dcmrfifo *fifo;
register struct dcmpreg *pp;
register unsigned head;
int c, stat, port;
port = DCMCONUNIT;
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
int
dcmgetchar(dev)
dev_t dev;
{
return(0);
}
#endif
/* ARGSUSED */
void
dcmputchar(dev, c)
dev_t dev;
register int c;
{
register struct dcmdevice *dcm = dcmcnaddr;
register struct dcmpreg *pp;
register int timo;
unsigned tail;
int port, stat;
port = DCMCONUNIT;
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
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