NetBSD/sys/arch/hp300/dev/hpib.c

238 lines
5.8 KiB
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.
*
* from: @(#)hpib.c 7.3 (Berkeley) 12/16/90
* $Id: hpib.c,v 1.2 1993/05/22 07:56:20 cgd Exp $
*/
/*
* 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