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[unix-history] / usr / src / sys / hp300 / dev / nhpib.c
/*
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
* @(#)nhpib.c 7.1 (Berkeley) %G%
*/
/*
* Internal/98624 HPIB driver
*/
#include "hpib.h"
#if NHPIB > 0
#include "param.h"
#include "systm.h"
#include "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 ((int)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, cnt)
register char *addr;
register int cnt;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int origcnt = cnt;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL;
nhpibowait(hd);
hd->hpib_data = C_TAG + hs->sc_ba;
hd->hpib_acr = AUX_STON;
nhpibowait(hd);
hd->hpib_data = C_LAG + slave;
nhpibowait(hd);
if (sec != -1) {
hd->hpib_data = C_SCG + sec;
nhpibowait(hd);
}
hd->hpib_acr = AUX_GTS;
if (cnt) {
while (--cnt) {
hd->hpib_data = *addr++;
if (nhpibowait(hd) < 0) {
nhpibifc(hd);
cnt++;
goto out;
}
}
hd->hpib_acr = AUX_EOI;
hd->hpib_data = *addr;
if (nhpibowait(hd) < 0) {
nhpibifc(hd);
cnt++;
}
else
hd->hpib_acr = AUX_TCA;
}
out:
return(origcnt - cnt);
}
nhpibrecv(unit, slave, sec, addr, cnt)
register char *addr;
register int cnt;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int origcnt = cnt;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL;
nhpibowait(hd);
hd->hpib_data = C_LAG + hs->sc_ba;
hd->hpib_acr = AUX_SLON;
nhpibowait(hd);
hd->hpib_data = C_TAG + slave;
nhpibowait(hd);
if (sec != -1) {
hd->hpib_data = C_SCG + sec;
nhpibowait(hd);
}
hd->hpib_acr = AUX_RHDF;
hd->hpib_acr = AUX_GTS;
if (cnt) {
while (--cnt >= 0) {
if (nhpibiwait(hd) < 0) {
nhpibifc(hd);
break;
}
*addr++ = hd->hpib_data;
}
cnt++;
hd->hpib_acr = AUX_TCA;
}
return(origcnt - cnt);
}
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 {
if (count == 1) {
hs->sc_curcnt = 1;
dmago(hs->sc_dq.dq_ctlr, addr, 1, DMAGO_BYTE);
nhpibsend(unit, slave, sec, 0, 0);
hd->hpib_acr = AUX_EOI;
}
else {
hs->sc_curcnt = count - 1;
dmago(hs->sc_dq.dq_ctlr, addr, count - 1, 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;
if (hs->sc_flags & HPIBF_READ) {
hs->sc_flags |= HPIBF_DONE;
hd->hpib_ie = IDS_IE;
} else {
if (hs->sc_count == 1) {
hs->sc_curcnt = 1;
hd->hpib_acr = AUX_EOI;
dmago(hs->sc_dq.dq_ctlr, hs->sc_addr, 1, DMAGO_BYTE);
return;
}
hs->sc_flags |= HPIBF_DONE;
hd->hpib_ie = IDS_IE;
hd->hpib_mim = MIS_BO;
}
}
nhpibintr(unit)
register int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register struct devqueue *dq = hs->sc_sq.dq_forw;
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;
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);
return(1);
}
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);
}
return(1);
}
return(1);
}
nhpibppoll(unit)
register int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int ppoll;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hd->hpib_acr = AUX_SPP;
DELAY(25);
ppoll = hd->hpib_cpt;
hd->hpib_acr = AUX_CPP;
return(ppoll);
}
nhpibowait(hd)
register struct nhpibdevice *hd;
{
extern int hpibtimeout;
register int timo = hpibtimeout;
while ((hd->hpib_mis & MIS_BO) == 0 && --timo)
;
if (timo == 0)
return(-1);
return(0);
}
nhpibiwait(hd)
register struct nhpibdevice *hd;
{
extern int hpibtimeout;
register int timo = hpibtimeout;
while ((hd->hpib_mis & MIS_BI) == 0 && --timo)
;
if (timo == 0)
return(-1);
return(0);
}
nhpibppwatch(unit)
register int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct devqueue *dq = hs->sc_sq.dq_forw;
register int slave = 0x80 >> dq->dq_slave;
if ((hs->sc_flags & HPIBF_PPOLL) == 0)
return;
if (nhpibppoll(unit) & slave)
((struct nhpibdevice *)hs->sc_hc->hp_addr)->hpib_mim = MIS_BO;
else
timeout(nhpibppwatch, unit, 1);
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.