NetBSD/sys/arch/hp300/stand/fhpib.c

193 lines
5.2 KiB
C

/* $NetBSD: fhpib.c,v 1.5 1995/08/05 16:47:42 thorpej Exp $ */
/*
* Copyright (c) 1982, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*
* @(#)fhpib.c 8.1 (Berkeley) 6/10/93
*/
/*
* 98625A/B HPIB driver
*/
#include <sys/param.h>
#include <hp300/dev/fhpibreg.h>
#include <hp300/stand/hpibvar.h>
#include <hp300/stand/samachdep.h>
fhpibinit(unit)
register int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct fhpibdevice *hd = (struct fhpibdevice *)hs->sc_addr;
if (hd->hpib_cid != HPIBC)
return(0);
hs->sc_type = HPIBC;
hs->sc_ba = HPIBC_BA;
fhpibreset(unit);
return(1);
}
fhpibreset(unit)
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct fhpibdevice *hd;
hd = (struct fhpibdevice *)hs->sc_addr;
hd->hpib_cid = 0xFF;
DELAY(100);
hd->hpib_cmd = CT_8BIT;
hd->hpib_ar = AR_ARONC;
hd->hpib_cmd |= CT_IFC;
hd->hpib_cmd |= CT_INITFIFO;
DELAY(100);
hd->hpib_cmd &= ~CT_IFC;
hd->hpib_cmd |= CT_REN;
hd->hpib_stat = ST_ATN;
hd->hpib_data = C_DCL;
DELAY(100000);
}
fhpibsend(unit, slave, sec, buf, cnt)
register char *buf;
register int cnt;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct fhpibdevice *hd;
int origcnt = cnt;
hd = (struct fhpibdevice *)hs->sc_addr;
hd->hpib_stat = 0;
hd->hpib_imask = IM_IDLE | IM_ROOM;
fhpibwait(hd, IM_IDLE);
hd->hpib_stat = ST_ATN;
hd->hpib_data = C_UNL;
hd->hpib_data = C_TAG + hs->sc_ba;
hd->hpib_data = C_LAG + slave;
if (sec != -1)
hd->hpib_data = C_SCG + sec;
fhpibwait(hd, IM_IDLE);
hd->hpib_stat = ST_WRITE;
if (cnt) {
while (--cnt) {
hd->hpib_data = *buf++;
if (fhpibwait(hd, IM_ROOM) < 0)
break;
}
hd->hpib_stat = ST_EOI;
hd->hpib_data = *buf;
if (fhpibwait(hd, IM_ROOM) < 0)
cnt++;
hd->hpib_stat = ST_ATN;
/* XXX: HP-UX claims bug with CS80 transparent messages */
if (sec == 0x12)
DELAY(150);
hd->hpib_data = C_UNL;
fhpibwait(hd, IM_IDLE);
}
hd->hpib_imask = 0;
return(origcnt - cnt);
}
fhpibrecv(unit, slave, sec, buf, cnt)
register char *buf;
register int cnt;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct fhpibdevice *hd;
int origcnt = cnt;
hd = (struct fhpibdevice *)hs->sc_addr;
hd->hpib_stat = 0;
hd->hpib_imask = IM_IDLE | IM_ROOM | IM_BYTE;
fhpibwait(hd, IM_IDLE);
hd->hpib_stat = ST_ATN;
hd->hpib_data = C_UNL;
hd->hpib_data = C_LAG + hs->sc_ba;
hd->hpib_data = C_TAG + slave;
if (sec != -1)
hd->hpib_data = C_SCG + sec;
fhpibwait(hd, IM_IDLE);
hd->hpib_stat = ST_READ0;
hd->hpib_data = 0;
if (cnt) {
while (--cnt >= 0) {
if (fhpibwait(hd, IM_BYTE) < 0)
break;
*buf++ = hd->hpib_data;
}
cnt++;
fhpibwait(hd, IM_ROOM);
hd->hpib_stat = ST_ATN;
hd->hpib_data = (slave == 31) ? C_UNA : C_UNT;
fhpibwait(hd, IM_IDLE);
}
hd->hpib_imask = 0;
return(origcnt - cnt);
}
fhpibppoll(unit)
register int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct fhpibdevice *hd;
register int ppoll;
hd = (struct fhpibdevice *)hs->sc_addr;
hd->hpib_stat = 0;
hd->hpib_psense = 0;
hd->hpib_pmask = 0xFF;
hd->hpib_imask = IM_PPRESP | IM_PABORT;
DELAY(25);
hd->hpib_intr = IM_PABORT;
ppoll = hd->hpib_data;
if (hd->hpib_intr & IM_PABORT)
ppoll = 0;
hd->hpib_imask = 0;
hd->hpib_pmask = 0;
hd->hpib_stat = ST_IENAB;
return(ppoll);
}
fhpibwait(hd, x)
register struct fhpibdevice *hd;
{
register int timo = 100000;
while ((hd->hpib_intr & x) == 0 && --timo)
;
if (timo == 0)
return(-1);
return(0);
}