BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / hp300 / stand / nhpib.c

/*
* Copyright (c) 1982, 1990 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.
*
*      @(#)nhpib.c     7.2 (Berkeley) 12/16/90
*/

/*
* Internal/98624 HPIB driver
*/

#include "sys/param.h"
#include "../dev/nhpibreg.h"
#include "hpibvar.h"

nhpibinit(unit)
{
       register struct hpib_softc *hs = &hpib_softc[unit];
       register struct nhpibdevice *hd = (struct nhpibdevice *)hs->sc_addr;
       extern int internalhpib;

       if ((int)hd == internalhpib) {
               hs->sc_type = HPIBA;
               hs->sc_ba = HPIBA_BA;
       }
       else if (hd->hpib_cid == HPIBB) {
               hs->sc_type = HPIBB;
               hs->sc_ba = hd->hpib_csa & CSA_BA;
       }
       else
               return(0);
       nhpibreset(unit);
       return(1);
}

nhpibreset(unit)
{
       register struct hpib_softc *hs = &hpib_softc[unit];
       register struct nhpibdevice *hd;

       hd = (struct nhpibdevice *)hs->sc_addr;
       hd->hpib_acr = AUX_SSWRST;
       hd->hpib_ar = hs->sc_ba;
       hd->hpib_lim = 0;
       hd->hpib_mim = 0;
       hd->hpib_acr = AUX_CDAI;
       hd->hpib_acr = AUX_CSHDW;
       hd->hpib_acr = AUX_SSTD1;
       hd->hpib_acr = AUX_SVSTD1;
       hd->hpib_acr = AUX_CPP;
       hd->hpib_acr = AUX_CHDFA;
       hd->hpib_acr = AUX_CHDFE;
       hd->hpib_acr = AUX_RHDF;
       hd->hpib_acr = AUX_CSWRST;
       hd->hpib_acr = AUX_TCA;
       hd->hpib_acr = AUX_CSRE;
       hd->hpib_acr = AUX_SSIC;
       DELAY(100);
       hd->hpib_acr = AUX_CSIC;
       hd->hpib_acr = AUX_SSRE;
       hd->hpib_data = C_DCL;
       DELAY(100000);
}

nhpibsend(unit, slave, sec, buf, cnt)
       register char *buf;
       register int cnt;
{
       register struct hpib_softc *hs = &hpib_softc[unit];
       register struct nhpibdevice *hd;
       register int origcnt = cnt;

       hd = (struct nhpibdevice *)hs->sc_addr;
       hd->hpib_acr = AUX_TCA;
       hd->hpib_data = C_UNL;
       nhpibowait(hd);
       hd->hpib_data = C_TAG + hs->sc_ba;
       hd->hpib_acr = AUX_STON;
       nhpibowait(hd);
       hd->hpib_data = C_LAG + slave;
       nhpibowait(hd);
       if (sec != -1) {
               hd->hpib_data = C_SCG + sec;
               nhpibowait(hd);
       }
       hd->hpib_acr = AUX_GTS;
       if (cnt) {
               while (--cnt) {
                       hd->hpib_data = *buf++;
                       if (nhpibowait(hd) < 0)
                               break;
               }
               hd->hpib_acr = AUX_EOI;
               hd->hpib_data = *buf;
               if (nhpibowait(hd) < 0)
                       cnt++;
               hd->hpib_acr = AUX_TCA;
       }
       return(origcnt - cnt);
}

nhpibrecv(unit, slave, sec, buf, cnt)
       register char *buf;
       register int cnt;
{
       register struct hpib_softc *hs = &hpib_softc[unit];
       register struct nhpibdevice *hd;
       register int origcnt = cnt;

       hd = (struct nhpibdevice *)hs->sc_addr;
       hd->hpib_acr = AUX_TCA;
       hd->hpib_data = C_UNL;
       nhpibowait(hd);
       hd->hpib_data = C_LAG + hs->sc_ba;
       hd->hpib_acr = AUX_SLON;
       nhpibowait(hd);
       hd->hpib_data = C_TAG + slave;
       nhpibowait(hd);
       if (sec != -1) {
               hd->hpib_data = C_SCG + sec;
               nhpibowait(hd);
       }
       hd->hpib_acr = AUX_RHDF;
       hd->hpib_acr = AUX_GTS;
       if (cnt) {
               while (--cnt >= 0) {
                       if (nhpibiwait(hd) < 0)
                               break;
                       *buf++ = hd->hpib_data;
               }
               cnt++;
               hd->hpib_acr = AUX_TCA;
       }
       return(origcnt - cnt);
}

nhpibppoll(unit)
       register int unit;
{
       register struct hpib_softc *hs = &hpib_softc[unit];
       register struct nhpibdevice *hd;
       register int ppoll;

       hd = (struct nhpibdevice *)hs->sc_addr;
       hd->hpib_acr = AUX_SPP;
       DELAY(25);
       ppoll = hd->hpib_cpt;
       hd->hpib_acr = AUX_CPP;
       return(ppoll);
}

nhpibowait(hd)
       register struct nhpibdevice *hd;
{
       register int timo = 100000;

       while ((hd->hpib_mis & MIS_BO) == 0 && --timo)
               ;
       if (timo == 0)
               return(-1);
       return(0);
}

nhpibiwait(hd)
       register struct nhpibdevice *hd;
{
       register int timo = 100000;

       while ((hd->hpib_mis & MIS_BI) == 0 && --timo)
               ;
       if (timo == 0)
               return(-1);
       return(0);
}