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- /*
- * 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.
- *
- * @(#)hpib.c 7.3 (Berkeley) 12/16/90
- */
-
- /*
- * HPIB driver
- */
- #include "hpib.h"
- #if NHPIB > 0
-
- #include "sys/param.h"
- #include "sys/systm.h"
- #include "sys/buf.h"
- #include "device.h"
- #include "hpibvar.h"
- #include "dmavar.h"
-
- #include "../include/cpu.h"
- #include "../hp300/isr.h"
-
- int hpibinit(), hpibstart(), hpibgo(), hpibintr(), hpibdone();
- struct driver hpibdriver = {
- hpibinit, "hpib", hpibstart, hpibgo, hpibintr, hpibdone,
- };
-
- struct hpib_softc hpib_softc[NHPIB];
- struct isr hpib_isr[NHPIB];
- int nhpibppoll(), fhpibppoll();
-
- int hpibtimeout = 100000; /* # of status tests before we give up */
- int hpibidtimeout = 20000; /* # of status tests for hpibid() calls */
- int hpibdmathresh = 3; /* byte count beyond which to attempt dma */
-
- hpibinit(hc)
- register struct hp_ctlr *hc;
- {
- register struct hpib_softc *hs = &hpib_softc[hc->hp_unit];
-
- if (!nhpibtype(hc) && !fhpibtype(hc))
- return(0);
- hs->sc_hc = hc;
- hs->sc_dq.dq_unit = hc->hp_unit;
- hs->sc_dq.dq_driver = &hpibdriver;
- hs->sc_sq.dq_forw = hs->sc_sq.dq_back = &hs->sc_sq;
- hpib_isr[hc->hp_unit].isr_intr = hpibintr;
- hpib_isr[hc->hp_unit].isr_ipl = hc->hp_ipl;
- hpib_isr[hc->hp_unit].isr_arg = hc->hp_unit;
- isrlink(&hpib_isr[hc->hp_unit]);
- hpibreset(hc->hp_unit);
- return(1);
- }
-
- hpibreset(unit)
- register int unit;
- {
- if (hpib_softc[unit].sc_type == HPIBC)
- fhpibreset(unit);
- else
- nhpibreset(unit);
- }
-
- hpibreq(dq)
- register struct devqueue *dq;
- {
- register struct devqueue *hq;
-
- hq = &hpib_softc[dq->dq_ctlr].sc_sq;
- insque(dq, hq->dq_back);
- if (dq->dq_back == hq)
- return(1);
- return(0);
- }
-
- hpibfree(dq)
- register struct devqueue *dq;
- {
- register struct devqueue *hq;
-
- hq = &hpib_softc[dq->dq_ctlr].sc_sq;
- remque(dq);
- if ((dq = hq->dq_forw) != hq)
- (dq->dq_driver->d_start)(dq->dq_unit);
- }
-
- hpibid(unit, slave)
- {
- short id;
- int ohpibtimeout;
-
- /*
- * XXX: shorten timeout value (so autoconfig doesn't take forever)
- */
- ohpibtimeout = hpibtimeout;
- hpibtimeout = hpibidtimeout;
- if (hpibrecv(unit, 31, slave, &id, 2) != 2)
- id = 0;
- hpibtimeout = ohpibtimeout;
- return(id);
- }
-
- hpibsend(unit, slave, sec, addr, cnt)
- register int unit;
- {
- if (hpib_softc[unit].sc_type == HPIBC)
- return(fhpibsend(unit, slave, sec, addr, cnt));
- else
- return(nhpibsend(unit, slave, sec, addr, cnt));
- }
-
- hpibrecv(unit, slave, sec, addr, cnt)
- register int unit;
- {
- if (hpib_softc[unit].sc_type == HPIBC)
- return(fhpibrecv(unit, slave, sec, addr, cnt));
- else
- return(nhpibrecv(unit, slave, sec, addr, cnt));
- }
-
- hpibpptest(unit, slave)
- register int unit;
- {
- int (*ppoll)();
-
- ppoll = (hpib_softc[unit].sc_type == HPIBC) ? fhpibppoll : nhpibppoll;
- return((*ppoll)(unit) & (0x80 >> slave));
- }
-
- hpibawait(unit)
- {
- register struct hpib_softc *hs = &hpib_softc[unit];
-
- hs->sc_flags |= HPIBF_PPOLL;
- if (hs->sc_type == HPIBC)
- fhpibppwatch(unit);
- else
- nhpibppwatch(unit);
- }
-
- hpibswait(unit, slave)
- register int unit;
- {
- register int timo = hpibtimeout;
- register int mask, (*ppoll)();
-
- ppoll = (hpib_softc[unit].sc_type == HPIBC) ? fhpibppoll : nhpibppoll;
- mask = 0x80 >> slave;
- while (((ppoll)(unit) & mask) == 0)
- if (--timo == 0) {
- printf("hpib%d: swait timeout\n", unit);
- return(-1);
- }
- return(0);
- }
-
- hpibustart(unit)
- {
- register struct hpib_softc *hs = &hpib_softc[unit];
-
- if (hs->sc_type == HPIBA)
- hs->sc_dq.dq_ctlr = DMA0;
- else
- hs->sc_dq.dq_ctlr = DMA0 | DMA1;
- if (dmareq(&hs->sc_dq))
- return(1);
- return(0);
- }
-
- hpibstart(unit)
- {
- register struct devqueue *dq;
-
- dq = hpib_softc[unit].sc_sq.dq_forw;
- (dq->dq_driver->d_go)(dq->dq_unit);
- }
-
- hpibgo(unit, slave, sec, addr, count, rw)
- register int unit;
- {
- if (hpib_softc[unit].sc_type == HPIBC)
- fhpibgo(unit, slave, sec, addr, count, rw);
- else
- nhpibgo(unit, slave, sec, addr, count, rw);
- }
-
- hpibdone(unit)
- register int unit;
- {
- if (hpib_softc[unit].sc_type == HPIBC)
- fhpibdone(unit);
- else
- nhpibdone(unit);
- }
-
- hpibintr(unit)
- register int unit;
- {
- int found;
-
- if (hpib_softc[unit].sc_type == HPIBC)
- found = fhpibintr(unit);
- else
- found = nhpibintr(unit);
- return(found);
- }
- #endif
-