merge in hp300 support from Utah

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

/*
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
*      @(#)fhpib.c     7.1 (Berkeley) %G%
*/

/*
* 98625A/B HPIB driver
*/

#include "param.h"
#include "../hpdev/fhpibreg.h"
#include "hpibvar.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);
}