[unix-history] / usr / src / sys / hp300 / dev / nhpib.c

/*
 * Copyright (c) 1982, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)nhpib.c	8.1 (Berkeley) %G%
 */

/*
 * Internal/98624 HPIB driver
 */
#include "hpib.h"
#if NHPIB > 0

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>

#include <hp/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)
{
	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);
}

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
Commit	Line	Data
60f56dfc	1	/*
030a8056 KB	2	* Copyright (c) 1982, 1990, 1993
030a8056 KB	3	* The Regents of the University of California. All rights reserved.
60f56dfc KM	4	*
	5	* %sccs.include.redist.c%
	6	*
030a8056	7	* @(#)nhpib.c 8.1 (Berkeley) %G%
60f56dfc KM	8	*/
	9
	10	/*
	11	* Internal/98624 HPIB driver
	12	*/
	13	#include "hpib.h"
	14	#if NHPIB > 0
	15
38a01dbe KB	16	#include <sys/param.h>
	17	#include <sys/systm.h>
	18	#include <sys/buf.h>
b28b3a13	19
38a01dbe KB	20	#include <hp/dev/device.h>
	21	#include <hp300/dev/nhpibreg.h>
	22	#include <hp300/dev/hpibvar.h>
	23	#include <hp300/dev/dmavar.h>
60f56dfc KM	24
	25	nhpibtype(hc)
	26	register struct hp_ctlr *hc;
	27	{
	28	register struct hpib_softc *hs = &hpib_softc[hc->hp_unit];
	29	register struct nhpibdevice hd = (struct nhpibdevice )hc->hp_addr;
	30
7a5fd5d5	31	if (hc->hp_addr == internalhpib) {
60f56dfc KM	32	hs->sc_type = HPIBA;
	33	hs->sc_ba = HPIBA_BA;
	34	hc->hp_ipl = HPIBA_IPL;
	35	}
	36	else if (hd->hpib_cid == HPIBB) {
	37	hs->sc_type = HPIBB;
	38	hs->sc_ba = hd->hpib_csa & CSA_BA;
	39	hc->hp_ipl = HPIB_IPL(hd->hpib_ids);
	40	}
	41	else
	42	return(0);
	43	return(1);
	44	}
	45
	46	nhpibreset(unit)
	47	{
	48	register struct hpib_softc *hs = &hpib_softc[unit];
	49	register struct nhpibdevice *hd;
	50
	51	hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
	52	hd->hpib_acr = AUX_SSWRST;
	53	hd->hpib_ar = hs->sc_ba;
	54	hd->hpib_lim = LIS_ERR;
	55	hd->hpib_mim = 0;
	56	hd->hpib_acr = AUX_CDAI;
	57	hd->hpib_acr = AUX_CSHDW;
	58	hd->hpib_acr = AUX_SSTD1;
	59	hd->hpib_acr = AUX_SVSTD1;
	60	hd->hpib_acr = AUX_CPP;
	61	hd->hpib_acr = AUX_CHDFA;
	62	hd->hpib_acr = AUX_CHDFE;
	63	hd->hpib_acr = AUX_RHDF;
	64	hd->hpib_acr = AUX_CSWRST;
	65	nhpibifc(hd);
	66	hd->hpib_ie = IDS_IE;
	67	hd->hpib_data = C_DCL;
	68	DELAY(100000);
	69	}
	70
	71	nhpibifc(hd)
	72	register struct nhpibdevice *hd;
	73	{
	74	hd->hpib_acr = AUX_TCA;
	75	hd->hpib_acr = AUX_CSRE;
	76	hd->hpib_acr = AUX_SSIC;
	77	DELAY(100);
	78	hd->hpib_acr = AUX_CSIC;
	79	hd->hpib_acr = AUX_SSRE;
	80	}
	81
a47d912d	82	nhpibsend(unit, slave, sec, addr, origcnt)
60f56dfc	83	register char *addr;
60f56dfc KM	84	{
	85	register struct hpib_softc *hs = &hpib_softc[unit];
	86	register struct nhpibdevice *hd;
a47d912d	87	register int cnt = origcnt;
60f56dfc KM	88
	89	hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
	90	hd->hpib_acr = AUX_TCA;
	91	hd->hpib_data = C_UNL;
a47d912d KM	92	if (nhpibwait(hd, MIS_BO))
a47d912d KM	93	goto senderror;
60f56dfc KM	94	hd->hpib_data = C_TAG + hs->sc_ba;
60f56dfc KM	95	hd->hpib_acr = AUX_STON;
a47d912d KM	96	if (nhpibwait(hd, MIS_BO))
a47d912d KM	97	goto senderror;
60f56dfc	98	hd->hpib_data = C_LAG + slave;
a47d912d KM	99	if (nhpibwait(hd, MIS_BO))
a47d912d KM	100	goto senderror;
60f56dfc KM	101	if (sec != -1) {
60f56dfc KM	102	hd->hpib_data = C_SCG + sec;
a47d912d KM	103	if (nhpibwait(hd, MIS_BO))
a47d912d KM	104	goto senderror;
60f56dfc KM	105	}
	106	hd->hpib_acr = AUX_GTS;
	107	if (cnt) {
a47d912d	108	while (--cnt > 0) {
60f56dfc	109	hd->hpib_data = *addr++;
a47d912d KM	110	if (nhpibwait(hd, MIS_BO))
a47d912d KM	111	goto senderror;
60f56dfc KM	112	}
	113	hd->hpib_acr = AUX_EOI;
	114	hd->hpib_data = *addr;
a47d912d KM	115	if (nhpibwait(hd, MIS_BO))
	116	goto senderror;
	117	hd->hpib_acr = AUX_TCA;
	118	#if 0
	119	/*
	120	* May be causing 345 disks to hang due to interference
	121	* with PPOLL mechanism.
	122	*/
	123	hd->hpib_data = C_UNL;
	124	(void) nhpibwait(hd, MIS_BO);
	125	#endif
60f56dfc	126	}
a47d912d KM	127	return(origcnt);
	128	senderror:
	129	nhpibifc(hd);
	130	return(origcnt - cnt - 1);
60f56dfc KM	131	}
60f56dfc KM	132
a47d912d	133	nhpibrecv(unit, slave, sec, addr, origcnt)
60f56dfc	134	register char *addr;
60f56dfc KM	135	{
	136	register struct hpib_softc *hs = &hpib_softc[unit];
	137	register struct nhpibdevice *hd;
a47d912d	138	register int cnt = origcnt;
60f56dfc KM	139
	140	hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
	141	hd->hpib_acr = AUX_TCA;
	142	hd->hpib_data = C_UNL;
a47d912d KM	143	if (nhpibwait(hd, MIS_BO))
a47d912d KM	144	goto recverror;
60f56dfc KM	145	hd->hpib_data = C_LAG + hs->sc_ba;
60f56dfc KM	146	hd->hpib_acr = AUX_SLON;
a47d912d KM	147	if (nhpibwait(hd, MIS_BO))
a47d912d KM	148	goto recverror;
60f56dfc	149	hd->hpib_data = C_TAG + slave;
a47d912d KM	150	if (nhpibwait(hd, MIS_BO))
a47d912d KM	151	goto recverror;
60f56dfc KM	152	if (sec != -1) {
60f56dfc KM	153	hd->hpib_data = C_SCG + sec;
a47d912d KM	154	if (nhpibwait(hd, MIS_BO))
a47d912d KM	155	goto recverror;
60f56dfc KM	156	}
	157	hd->hpib_acr = AUX_RHDF;
	158	hd->hpib_acr = AUX_GTS;
	159	if (cnt) {
	160	while (--cnt >= 0) {
a47d912d KM	161	if (nhpibwait(hd, MIS_BI))
a47d912d KM	162	goto recvbyteserror;
60f56dfc KM	163	*addr++ = hd->hpib_data;
60f56dfc KM	164	}
60f56dfc	165	hd->hpib_acr = AUX_TCA;
a47d912d KM	166	hd->hpib_data = (slave == 31) ? C_UNA : C_UNT;
a47d912d KM	167	(void) nhpibwait(hd, MIS_BO);
60f56dfc	168	}
a47d912d KM	169	return(origcnt);
	170	recverror:
	171	nhpibifc(hd);
	172	recvbyteserror:
	173	return(origcnt - cnt - 1);
60f56dfc KM	174	}
	175
	176	nhpibgo(unit, slave, sec, addr, count, rw)
	177	register int unit, slave;
	178	char *addr;
	179	{
	180	register struct hpib_softc *hs = &hpib_softc[unit];
	181	register struct nhpibdevice *hd;
	182
	183	hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
	184	hs->sc_flags \|= HPIBF_IO;
	185	if (rw == B_READ)
	186	hs->sc_flags \|= HPIBF_READ;
	187	#ifdef DEBUG
	188	else if (hs->sc_flags & HPIBF_READ) {
	189	printf("nhpibgo: HPIBF_READ still set\n");
	190	hs->sc_flags &= ~HPIBF_READ;
	191	}
	192	#endif
	193	hs->sc_count = count;
	194	hs->sc_addr = addr;
	195	if (hs->sc_flags & HPIBF_READ) {
	196	hs->sc_curcnt = count;
	197	dmago(hs->sc_dq.dq_ctlr, addr, count, DMAGO_BYTE\|DMAGO_READ);
	198	nhpibrecv(unit, slave, sec, 0, 0);
	199	hd->hpib_mim = MIS_END;
a47d912d KM	200	} else {
	201	hd->hpib_mim = 0;
	202	if (count < hpibdmathresh) {
	203	hs->sc_curcnt = count;
	204	nhpibsend(unit, slave, sec, addr, count);
	205	nhpibdone(unit);
	206	return;
60f56dfc	207	}
a47d912d KM	208	hs->sc_curcnt = --count;
	209	dmago(hs->sc_dq.dq_ctlr, addr, count, DMAGO_BYTE);
	210	nhpibsend(unit, slave, sec, 0, 0);
60f56dfc KM	211	}
	212	hd->hpib_ie = IDS_IE \| IDS_DMA(hs->sc_dq.dq_ctlr);
	213	}
	214
	215	nhpibdone(unit)
	216	register int unit;
	217	{
	218	register struct hpib_softc *hs = &hpib_softc[unit];
	219	register struct nhpibdevice *hd;
	220	register int cnt;
	221
	222	hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
	223	cnt = hs->sc_curcnt;
	224	hs->sc_addr += cnt;
	225	hs->sc_count -= cnt;
a47d912d KM	226	hs->sc_flags \|= HPIBF_DONE;
	227	hd->hpib_ie = IDS_IE;
	228	if ((hs->sc_flags & HPIBF_READ) == 0) {
60f56dfc	229	if (hs->sc_count == 1) {
a47d912d	230	(void) nhpibwait(hd, MIS_BO);
60f56dfc	231	hd->hpib_acr = AUX_EOI;
a47d912d KM	232	hd->hpib_data = *hs->sc_addr;
a47d912d KM	233	hd->hpib_mim = MIS_BO;
60f56dfc	234	}
a47d912d KM	235	#ifdef DEBUG
	236	else if (hs->sc_count)
	237	panic("nhpibdone");
	238	#endif
60f56dfc KM	239	}
	240	}
	241
	242	nhpibintr(unit)
	243	register int unit;
	244	{
	245	register struct hpib_softc *hs = &hpib_softc[unit];
	246	register struct nhpibdevice *hd;
a47d912d	247	register struct devqueue *dq;
60f56dfc KM	248	register int stat0;
	249	int stat1;
	250
	251	#ifdef lint
	252	if (stat1 = unit) return(1);
	253	#endif
	254	hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
	255	if ((hd->hpib_ids & IDS_IR) == 0)
	256	return(0);
	257	stat0 = hd->hpib_mis;
	258	stat1 = hd->hpib_lis;
a47d912d	259	dq = hs->sc_sq.dq_forw;
60f56dfc KM	260	if (hs->sc_flags & HPIBF_IO) {
	261	hd->hpib_mim = 0;
	262	if ((hs->sc_flags & HPIBF_DONE) == 0)
	263	dmastop(hs->sc_dq.dq_ctlr);
	264	hd->hpib_acr = AUX_TCA;
	265	hs->sc_flags &= ~(HPIBF_DONE\|HPIBF_IO\|HPIBF_READ);
	266	dmafree(&hs->sc_dq);
	267	(dq->dq_driver->d_intr)(dq->dq_unit);
a47d912d	268	} else if (hs->sc_flags & HPIBF_PPOLL) {
60f56dfc KM	269	hd->hpib_mim = 0;
	270	stat0 = nhpibppoll(unit);
	271	if (stat0 & (0x80 >> dq->dq_slave)) {
	272	hs->sc_flags &= ~HPIBF_PPOLL;
	273	(dq->dq_driver->d_intr)(dq->dq_unit);
	274	}
a47d912d KM	275	#ifdef DEBUG
	276	else
	277	printf("hpib%d: PPOLL intr bad status %x\n",
	278	unit, stat0);
	279	#endif
60f56dfc KM	280	}
	281	return(1);
	282	}
	283
	284	nhpibppoll(unit)
a47d912d	285	int unit;
60f56dfc	286	{
60f56dfc KM	287	register struct nhpibdevice *hd;
	288	register int ppoll;
	289
a47d912d	290	hd = (struct nhpibdevice *)hpib_softc[unit].sc_hc->hp_addr;
60f56dfc KM	291	hd->hpib_acr = AUX_SPP;
	292	DELAY(25);
	293	ppoll = hd->hpib_cpt;
	294	hd->hpib_acr = AUX_CPP;
	295	return(ppoll);
	296	}
	297
a47d912d	298	nhpibwait(hd, x)
60f56dfc KM	299	register struct nhpibdevice *hd;
60f56dfc KM	300	{
60f56dfc KM	301	register int timo = hpibtimeout;
60f56dfc KM	302
a47d912d KM	303	while ((hd->hpib_mis & x) == 0 && --timo)
a47d912d KM	304	DELAY(1);
60f56dfc KM	305	if (timo == 0)
	306	return(-1);
	307	return(0);
	308	}
	309
88a0c57a CT	310	void
	311	nhpibppwatch(arg)
	312	void *arg;
60f56dfc	313	{
88a0c57a CT	314	register struct hpib_softc *hs;
88a0c57a CT	315	register int unit;
d1a1d388	316	extern int cold;
60f56dfc	317
88a0c57a CT	318	unit = (int)arg;
88a0c57a CT	319	hs = &hpib_softc[unit];
60f56dfc KM	320	if ((hs->sc_flags & HPIBF_PPOLL) == 0)
60f56dfc KM	321	return;
d1a1d388	322	again:
a47d912d	323	if (nhpibppoll(unit) & (0x80 >> hs->sc_sq.dq_forw->dq_slave))
60f56dfc	324	((struct nhpibdevice *)hs->sc_hc->hp_addr)->hpib_mim = MIS_BO;
d1a1d388 MH	325	else if (cold)
	326	/* timeouts not working yet */
	327	goto again;
60f56dfc	328	else
88a0c57a	329	timeout(nhpibppwatch, (void *)unit, 1);
60f56dfc KM	330	}
60f56dfc KM	331	#endif