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

364 lines
8.9 KiB
C

/*
* Copyright (c) 1982, 1990, 1993
* 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: @(#)nhpib.c 8.2 (Berkeley) 1/12/94
* $Id: nhpib.c,v 1.4 1994/05/23 05:59:10 mycroft Exp $
*/
/*
* Internal/98624 HPIB driver
*/
#include "hpib.h"
#if NHPIB > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <hp300/dev/device.h>
#include <hp300/dev/nhpibreg.h>
#include <hp300/dev/hpibvar.h>
#include <hp300/dev/dmavar.h>
nhpibtype(hc)
register struct hp_ctlr *hc;
{
register struct hpib_softc *hs = &hpib_softc[hc->hp_unit];
register struct nhpibdevice *hd = (struct nhpibdevice *)hc->hp_addr;
if (hc->hp_addr == internalhpib) {
hs->sc_type = HPIBA;
hs->sc_ba = HPIBA_BA;
hc->hp_ipl = HPIBA_IPL;
}
else if (hd->hpib_cid == HPIBB) {
hs->sc_type = HPIBB;
hs->sc_ba = hd->hpib_csa & CSA_BA;
hc->hp_ipl = HPIB_IPL(hd->hpib_ids);
}
else
return(0);
return(1);
}
nhpibreset(unit)
int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hd->hpib_acr = AUX_SSWRST;
hd->hpib_ar = hs->sc_ba;
hd->hpib_lim = LIS_ERR;
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;
nhpibifc(hd);
hd->hpib_ie = IDS_IE;
hd->hpib_data = C_DCL;
DELAY(100000);
}
nhpibifc(hd)
register struct nhpibdevice *hd;
{
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;
}
nhpibsend(unit, slave, sec, addr, origcnt)
int unit, slave, sec, origcnt;
register char *addr;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int cnt = origcnt;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL;
if (nhpibwait(hd, MIS_BO))
goto senderror;
hd->hpib_data = C_TAG + hs->sc_ba;
hd->hpib_acr = AUX_STON;
if (nhpibwait(hd, MIS_BO))
goto senderror;
hd->hpib_data = C_LAG + slave;
if (nhpibwait(hd, MIS_BO))
goto senderror;
if (sec != -1) {
hd->hpib_data = C_SCG + sec;
if (nhpibwait(hd, MIS_BO))
goto senderror;
}
hd->hpib_acr = AUX_GTS;
if (cnt) {
while (--cnt > 0) {
hd->hpib_data = *addr++;
if (nhpibwait(hd, MIS_BO))
goto senderror;
}
hd->hpib_acr = AUX_EOI;
hd->hpib_data = *addr;
if (nhpibwait(hd, MIS_BO))
goto senderror;
hd->hpib_acr = AUX_TCA;
#if 0
/*
* May be causing 345 disks to hang due to interference
* with PPOLL mechanism.
*/
hd->hpib_data = C_UNL;
(void) nhpibwait(hd, MIS_BO);
#endif
}
return(origcnt);
senderror:
nhpibifc(hd);
return(origcnt - cnt - 1);
}
nhpibrecv(unit, slave, sec, addr, origcnt)
int unit, slave, sec, origcnt;
register char *addr;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int cnt = origcnt;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL;
if (nhpibwait(hd, MIS_BO))
goto recverror;
hd->hpib_data = C_LAG + hs->sc_ba;
hd->hpib_acr = AUX_SLON;
if (nhpibwait(hd, MIS_BO))
goto recverror;
hd->hpib_data = C_TAG + slave;
if (nhpibwait(hd, MIS_BO))
goto recverror;
if (sec != -1) {
hd->hpib_data = C_SCG + sec;
if (nhpibwait(hd, MIS_BO))
goto recverror;
}
hd->hpib_acr = AUX_RHDF;
hd->hpib_acr = AUX_GTS;
if (cnt) {
while (--cnt >= 0) {
if (nhpibwait(hd, MIS_BI))
goto recvbyteserror;
*addr++ = hd->hpib_data;
}
hd->hpib_acr = AUX_TCA;
hd->hpib_data = (slave == 31) ? C_UNA : C_UNT;
(void) nhpibwait(hd, MIS_BO);
}
return(origcnt);
recverror:
nhpibifc(hd);
recvbyteserror:
return(origcnt - cnt - 1);
}
nhpibgo(unit, slave, sec, addr, count, rw)
register int unit, slave;
int sec, count, rw;
char *addr;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hs->sc_flags |= HPIBF_IO;
if (rw == B_READ)
hs->sc_flags |= HPIBF_READ;
#ifdef DEBUG
else if (hs->sc_flags & HPIBF_READ) {
printf("nhpibgo: HPIBF_READ still set\n");
hs->sc_flags &= ~HPIBF_READ;
}
#endif
hs->sc_count = count;
hs->sc_addr = addr;
if (hs->sc_flags & HPIBF_READ) {
hs->sc_curcnt = count;
dmago(hs->sc_dq.dq_ctlr, addr, count, DMAGO_BYTE|DMAGO_READ);
nhpibrecv(unit, slave, sec, 0, 0);
hd->hpib_mim = MIS_END;
} else {
hd->hpib_mim = 0;
if (count < hpibdmathresh) {
hs->sc_curcnt = count;
nhpibsend(unit, slave, sec, addr, count);
nhpibdone(unit);
return;
}
hs->sc_curcnt = --count;
dmago(hs->sc_dq.dq_ctlr, addr, count, DMAGO_BYTE);
nhpibsend(unit, slave, sec, 0, 0);
}
hd->hpib_ie = IDS_IE | IDS_DMA(hs->sc_dq.dq_ctlr);
}
nhpibdone(unit)
register int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int cnt;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
cnt = hs->sc_curcnt;
hs->sc_addr += cnt;
hs->sc_count -= cnt;
hs->sc_flags |= HPIBF_DONE;
hd->hpib_ie = IDS_IE;
if ((hs->sc_flags & HPIBF_READ) == 0) {
if (hs->sc_count == 1) {
(void) nhpibwait(hd, MIS_BO);
hd->hpib_acr = AUX_EOI;
hd->hpib_data = *hs->sc_addr;
hd->hpib_mim = MIS_BO;
}
#ifdef DEBUG
else if (hs->sc_count)
panic("nhpibdone");
#endif
}
}
nhpibintr(unit)
register int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register struct devqueue *dq;
register int stat0;
int stat1;
#ifdef lint
if (stat1 = unit) return(1);
#endif
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
if ((hd->hpib_ids & IDS_IR) == 0)
return(0);
stat0 = hd->hpib_mis;
stat1 = hd->hpib_lis;
dq = hs->sc_sq.dq_forw;
if (hs->sc_flags & HPIBF_IO) {
hd->hpib_mim = 0;
if ((hs->sc_flags & HPIBF_DONE) == 0)
dmastop(hs->sc_dq.dq_ctlr);
hd->hpib_acr = AUX_TCA;
hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ);
dmafree(&hs->sc_dq);
(dq->dq_driver->d_intr)(dq->dq_unit);
} else if (hs->sc_flags & HPIBF_PPOLL) {
hd->hpib_mim = 0;
stat0 = nhpibppoll(unit);
if (stat0 & (0x80 >> dq->dq_slave)) {
hs->sc_flags &= ~HPIBF_PPOLL;
(dq->dq_driver->d_intr)(dq->dq_unit);
}
#ifdef DEBUG
else
printf("hpib%d: PPOLL intr bad status %x\n",
unit, stat0);
#endif
}
return(1);
}
nhpibppoll(unit)
int unit;
{
register struct nhpibdevice *hd;
register int ppoll;
hd = (struct nhpibdevice *)hpib_softc[unit].sc_hc->hp_addr;
hd->hpib_acr = AUX_SPP;
DELAY(25);
ppoll = hd->hpib_cpt;
hd->hpib_acr = AUX_CPP;
return(ppoll);
}
nhpibwait(hd, x)
register struct nhpibdevice *hd;
int x;
{
register int timo = hpibtimeout;
while ((hd->hpib_mis & x) == 0 && --timo)
DELAY(1);
if (timo == 0)
return(-1);
return(0);
}
void
nhpibppwatch(arg)
void *arg;
{
register struct hpib_softc *hs;
register int unit;
extern int cold;
unit = (int)arg;
hs = &hpib_softc[unit];
if ((hs->sc_flags & HPIBF_PPOLL) == 0)
return;
again:
if (nhpibppoll(unit) & (0x80 >> hs->sc_sq.dq_forw->dq_slave))
((struct nhpibdevice *)hs->sc_hc->hp_addr)->hpib_mim = MIS_BO;
else if (cold)
/* timeouts not working yet */
goto again;
else
timeout(nhpibppwatch, (void *)unit, 1);
}
#endif