208 lines
5.2 KiB
C
208 lines
5.2 KiB
C
/* $NetBSD: nhpib.c,v 1.1 1997/02/04 03:52:43 thorpej Exp $ */
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/*
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* Copyright (c) 1982, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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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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* @(#)nhpib.c 8.1 (Berkeley) 6/10/93
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*/
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/*
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* Internal/98624 HPIB driver
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*/
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#include <sys/param.h>
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#include <hp300/dev/nhpibreg.h>
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#include <hp300/stand/common/hpibvar.h>
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#include <hp300/stand/common/samachdep.h>
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nhpibinit(unit)
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd = (struct nhpibdevice *)hs->sc_addr;
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extern int internalhpib;
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if ((int)hd == internalhpib) {
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hs->sc_type = HPIBA;
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hs->sc_ba = HPIBA_BA;
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}
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else if (hd->hpib_cid == HPIBB) {
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hs->sc_type = HPIBB;
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hs->sc_ba = hd->hpib_csa & CSA_BA;
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}
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else
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return(0);
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nhpibreset(unit);
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return(1);
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}
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nhpibreset(unit)
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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hd = (struct nhpibdevice *)hs->sc_addr;
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hd->hpib_acr = AUX_SSWRST;
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hd->hpib_ar = hs->sc_ba;
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hd->hpib_lim = 0;
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hd->hpib_mim = 0;
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hd->hpib_acr = AUX_CDAI;
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hd->hpib_acr = AUX_CSHDW;
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hd->hpib_acr = AUX_SSTD1;
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hd->hpib_acr = AUX_SVSTD1;
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hd->hpib_acr = AUX_CPP;
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hd->hpib_acr = AUX_CHDFA;
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hd->hpib_acr = AUX_CHDFE;
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hd->hpib_acr = AUX_RHDF;
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hd->hpib_acr = AUX_CSWRST;
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hd->hpib_acr = AUX_TCA;
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hd->hpib_acr = AUX_CSRE;
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hd->hpib_acr = AUX_SSIC;
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DELAY(100);
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hd->hpib_acr = AUX_CSIC;
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hd->hpib_acr = AUX_SSRE;
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hd->hpib_data = C_DCL;
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DELAY(100000);
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}
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nhpibsend(unit, slave, sec, buf, cnt)
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register char *buf;
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register int cnt;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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register int origcnt = cnt;
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hd = (struct nhpibdevice *)hs->sc_addr;
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hd->hpib_acr = AUX_TCA;
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hd->hpib_data = C_UNL;
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nhpibowait(hd);
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hd->hpib_data = C_TAG + hs->sc_ba;
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hd->hpib_acr = AUX_STON;
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nhpibowait(hd);
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hd->hpib_data = C_LAG + slave;
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nhpibowait(hd);
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if (sec != -1) {
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hd->hpib_data = C_SCG + sec;
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nhpibowait(hd);
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}
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hd->hpib_acr = AUX_GTS;
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if (cnt) {
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while (--cnt) {
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hd->hpib_data = *buf++;
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if (nhpibowait(hd) < 0)
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break;
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}
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hd->hpib_acr = AUX_EOI;
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hd->hpib_data = *buf;
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if (nhpibowait(hd) < 0)
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cnt++;
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hd->hpib_acr = AUX_TCA;
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}
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return(origcnt - cnt);
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}
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nhpibrecv(unit, slave, sec, buf, cnt)
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register char *buf;
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register int cnt;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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register int origcnt = cnt;
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hd = (struct nhpibdevice *)hs->sc_addr;
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hd->hpib_acr = AUX_TCA;
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hd->hpib_data = C_UNL;
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nhpibowait(hd);
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hd->hpib_data = C_LAG + hs->sc_ba;
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hd->hpib_acr = AUX_SLON;
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nhpibowait(hd);
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hd->hpib_data = C_TAG + slave;
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nhpibowait(hd);
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if (sec != -1) {
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hd->hpib_data = C_SCG + sec;
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nhpibowait(hd);
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}
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hd->hpib_acr = AUX_RHDF;
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hd->hpib_acr = AUX_GTS;
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if (cnt) {
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while (--cnt >= 0) {
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if (nhpibiwait(hd) < 0)
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break;
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*buf++ = hd->hpib_data;
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}
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cnt++;
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hd->hpib_acr = AUX_TCA;
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}
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return(origcnt - cnt);
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}
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nhpibppoll(unit)
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register int unit;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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register int ppoll;
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hd = (struct nhpibdevice *)hs->sc_addr;
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hd->hpib_acr = AUX_SPP;
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DELAY(25);
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ppoll = hd->hpib_cpt;
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hd->hpib_acr = AUX_CPP;
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return(ppoll);
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}
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nhpibowait(hd)
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register struct nhpibdevice *hd;
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{
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register int timo = 100000;
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while ((hd->hpib_mis & MIS_BO) == 0 && --timo)
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;
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if (timo == 0)
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return(-1);
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return(0);
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}
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nhpibiwait(hd)
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register struct nhpibdevice *hd;
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{
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register int timo = 100000;
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while ((hd->hpib_mis & MIS_BI) == 0 && --timo)
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;
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if (timo == 0)
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return(-1);
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return(0);
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}
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