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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.
- *
- * @(#)nhpib.c 7.4 (Berkeley) 5/7/91
- */
-
- /*
- * Internal/98624 HPIB driver
- */
- #include "hpib.h"
- #if NHPIB > 0
-
- #include "sys/param.h"
- #include "sys/systm.h"
- #include "sys/buf.h"
-
- #include "device.h"
- #include "nhpibreg.h"
- #include "hpibvar.h"
- #include "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)
- {
- 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)
- 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)
- 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;
- 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;
- {
- register int timo = hpibtimeout;
-
- while ((hd->hpib_mis & x) == 0 && --timo)
- DELAY(1);
- if (timo == 0)
- return(-1);
- return(0);
- }
-
- nhpibppwatch(unit)
- register int unit;
- {
- register struct hpib_softc *hs = &hpib_softc[unit];
-
- if ((hs->sc_flags & HPIBF_PPOLL) == 0)
- return;
- if (nhpibppoll(unit) & (0x80 >> hs->sc_sq.dq_forw->dq_slave))
- ((struct nhpibdevice *)hs->sc_hc->hp_addr)->hpib_mim = MIS_BO;
- else
- timeout(nhpibppwatch, unit, 1);
- }
- #endif
-