[unix-history] / .ref-BSD-4_3_Net_2 / usr / src / sys / hp300 / dev / fhpib.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.
 *
 *	@(#)fhpib.c	7.3 (Berkeley) 12/16/90
 */

/*
 * 98625A/B HPIB driver
 */
#include "hpib.h"
#if NHPIB > 0

#include "sys/param.h"
#include "sys/systm.h"
#include "sys/buf.h"
#include "device.h"
#include "fhpibreg.h"
#include "hpibvar.h"
#include "dmavar.h"

/*
 * Inline version of fhpibwait to be used in places where
 * we don't worry about getting hung.
 */
#define	FHPIBWAIT(hd, m)	while (((hd)->hpib_intr & (m)) == 0) DELAY(1)

#ifdef DEBUG
int	fhpibdebugunit = -1;
int	fhpibdebug = 0;
#define FDB_FAIL	0x01
#define FDB_DMA		0x02
#define FDB_WAIT	0x04
#define FDB_PPOLL	0x08

int	dopriodma = 0;	/* use high priority DMA */
int	doworddma = 1;	/* non-zero if we should attempt word dma */
int	doppollint = 1;	/* use ppoll interrupts instead of watchdog */

long	fhpibbadint[2] = { 0 };
long	fhpibtransfer[NHPIB] = { 0 };
long	fhpibnondma[NHPIB] = { 0 };
long	fhpibworddma[NHPIB] = { 0 };
#endif

int	fhpibcmd[NHPIB];

fhpibtype(hc)
	register struct hp_ctlr *hc;
{
	register struct hpib_softc *hs = &hpib_softc[hc->hp_unit];
	register struct fhpibdevice *hd = (struct fhpibdevice *)hc->hp_addr;

	if (hd->hpib_cid != HPIBC)
		return(0);
	hs->sc_type = HPIBC;
	hs->sc_ba = HPIBC_BA;
	hc->hp_ipl = HPIB_IPL(hd->hpib_ids);
	return(1);
}

fhpibreset(unit)
{
	register struct hpib_softc *hs = &hpib_softc[unit];
	register struct fhpibdevice *hd;

	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	hd->hpib_cid = 0xFF;
	DELAY(100);
	hd->hpib_cmd = CT_8BIT;
	hd->hpib_ar = AR_ARONC;
	fhpibifc(hd);
	hd->hpib_ie = IDS_IE;
	hd->hpib_data = C_DCL;
	DELAY(100000);
	/*
	 * See if we can do word dma.
	 * If so, we should be able to write and read back the appropos bit.
	 */
	hd->hpib_ie |= IDS_WDMA;
	if (hd->hpib_ie & IDS_WDMA) {
		hd->hpib_ie &= ~IDS_WDMA;
		hs->sc_flags |= HPIBF_DMA16;
#ifdef DEBUG
		if (fhpibdebug & FDB_DMA)
			printf("fhpibtype: unit %d has word dma\n", unit);

#endif
	}
}

fhpibifc(hd)
	register struct fhpibdevice *hd;
{
	hd->hpib_cmd |= CT_IFC;
	hd->hpib_cmd |= CT_INITFIFO;
	DELAY(100);
	hd->hpib_cmd &= ~CT_IFC;
	hd->hpib_cmd |= CT_REN;
	hd->hpib_stat = ST_ATN;
}

fhpibsend(unit, slave, sec, addr, origcnt)
	register char *addr;
{
	register struct hpib_softc *hs = &hpib_softc[unit];
	register struct fhpibdevice *hd;
	register int cnt = origcnt;
	register int timo;

	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	hd->hpib_stat = 0;
	hd->hpib_imask = IM_IDLE | IM_ROOM;
	if (fhpibwait(hd, IM_IDLE) < 0)
		goto senderr;
	hd->hpib_stat = ST_ATN;
	hd->hpib_data = C_UNL;
	hd->hpib_data = C_TAG + hs->sc_ba;
	hd->hpib_data = C_LAG + slave;
	if (sec != -1)
		hd->hpib_data = C_SCG + sec;
	if (fhpibwait(hd, IM_IDLE) < 0)
		goto senderr;
	if (cnt) {
		hd->hpib_stat = ST_WRITE;
		while (--cnt) {
			hd->hpib_data = *addr++;
			timo = hpibtimeout;
			while ((hd->hpib_intr & IM_ROOM) == 0) {
				if (--timo <= 0)
					goto senderr;
				DELAY(1);
			}
		}
		hd->hpib_stat = ST_EOI;
		hd->hpib_data = *addr;
		FHPIBWAIT(hd, IM_ROOM);
		hd->hpib_stat = ST_ATN;
		/* XXX: HP-UX claims bug with CS80 transparent messages */
		if (sec == 0x12)
			DELAY(150);
		hd->hpib_data = C_UNL;
		(void) fhpibwait(hd, IM_IDLE);
	}
	hd->hpib_imask = 0;
	return (origcnt);
senderr:
	hd->hpib_imask = 0;
	fhpibifc(hd);
#ifdef DEBUG
	if (fhpibdebug & FDB_FAIL) {
		printf("hpib%d: fhpibsend failed: slave %d, sec %x, ",
			unit, slave, sec);
		printf("sent %d of %d bytes\n", origcnt-cnt-1, origcnt);
	}
#endif
	return(origcnt - cnt - 1);
}

fhpibrecv(unit, slave, sec, addr, origcnt)
	register char *addr;
{
	register struct hpib_softc *hs = &hpib_softc[unit];
	register struct fhpibdevice *hd;
	register int cnt = origcnt;
	register int timo;

	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	hd->hpib_stat = 0;
	hd->hpib_imask = IM_IDLE | IM_ROOM | IM_BYTE;
	if (fhpibwait(hd, IM_IDLE) < 0)
		goto recverror;
	hd->hpib_stat = ST_ATN;
	hd->hpib_data = C_UNL;
	hd->hpib_data = C_LAG + hs->sc_ba;
	hd->hpib_data = C_TAG + slave;
	if (sec != -1)
		hd->hpib_data = C_SCG + sec;
	if (fhpibwait(hd, IM_IDLE) < 0)
		goto recverror;
	hd->hpib_stat = ST_READ0;
	hd->hpib_data = 0;
	if (cnt) {
		while (--cnt >= 0) {
			timo = hpibtimeout;
			while ((hd->hpib_intr & IM_BYTE) == 0) {
				if (--timo == 0)
					goto recvbyteserror;
				DELAY(1);
			}
			*addr++ = hd->hpib_data;
		}
		FHPIBWAIT(hd, IM_ROOM);
		hd->hpib_stat = ST_ATN;
		hd->hpib_data = (slave == 31) ? C_UNA : C_UNT;
		(void) fhpibwait(hd, IM_IDLE);
	}
	hd->hpib_imask = 0;
	return (origcnt);

recverror:
	fhpibifc(hd);
recvbyteserror:
	hd->hpib_imask = 0;
#ifdef DEBUG
	if (fhpibdebug & FDB_FAIL) {
		printf("hpib%d: fhpibrecv failed: slave %d, sec %x, ",
		       unit, slave, sec);
		printf("got %d of %d bytes\n", origcnt-cnt-1, origcnt);
	}
#endif
	return(origcnt - cnt - 1);
}

fhpibgo(unit, slave, sec, addr, count, rw)
	register int unit;
	char *addr;
{
	register struct hpib_softc *hs = &hpib_softc[unit];
	register struct fhpibdevice *hd;
	register int i;
	int flags = 0;

#ifdef lint
	i = unit; if (i) return;
#endif
	hd = (struct fhpibdevice *)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("fhpibgo: HPIBF_READ still set\n");
		hs->sc_flags &= ~HPIBF_READ;
	}
#endif
	hs->sc_count = count;
	hs->sc_addr = addr;
#ifdef DEBUG
	fhpibtransfer[unit]++;
#endif
	if ((hs->sc_flags & HPIBF_DMA16) &&
	    ((int)addr & 1) == 0 && count && (count & 1) == 0
#ifdef DEBUG
	    && doworddma
#endif
	    ) {
#ifdef DEBUG
		fhpibworddma[unit]++;
#endif
		flags |= DMAGO_WORD;
		hd->hpib_latch = 0;
	}
#ifdef DEBUG
	if (dopriodma)
		flags |= DMAGO_PRI;
#endif
	if (hs->sc_flags & HPIBF_READ) {
		fhpibcmd[unit] = CT_REN | CT_8BIT;
		hs->sc_curcnt = count;
		dmago(hs->sc_dq.dq_ctlr, addr, count, flags|DMAGO_READ);
		if (fhpibrecv(unit, slave, sec, 0, 0) < 0) {
#ifdef DEBUG
			printf("fhpibgo: recv failed, retrying...\n");
#endif
			(void) fhpibrecv(unit, slave, sec, 0, 0);
		}
		i = hd->hpib_cmd;
		hd->hpib_cmd = fhpibcmd[unit];
		hd->hpib_ie = IDS_DMA(hs->sc_dq.dq_ctlr) |
			((flags & DMAGO_WORD) ? IDS_WDMA : 0);
		return;
	}
	fhpibcmd[unit] = CT_REN | CT_8BIT | CT_FIFOSEL;
	if (count < hpibdmathresh) {
#ifdef DEBUG
		fhpibnondma[unit]++;
		if (flags & DMAGO_WORD)
			fhpibworddma[unit]--;
#endif
		hs->sc_curcnt = count;
		(void) fhpibsend(unit, slave, sec, addr, count);
		fhpibdone(unit);
		return;
	}
	count -= (flags & DMAGO_WORD) ? 2 : 1;
	hs->sc_curcnt = count;
	dmago(hs->sc_dq.dq_ctlr, addr, count, flags);
	if (fhpibsend(unit, slave, sec, 0, 0) < 0) {
#ifdef DEBUG
		printf("fhpibgo: send failed, retrying...\n");
#endif
		(void) fhpibsend(unit, slave, sec, 0, 0);
	}
	i = hd->hpib_cmd;
	hd->hpib_cmd = fhpibcmd[unit];
	hd->hpib_ie = IDS_DMA(hs->sc_dq.dq_ctlr) | IDS_WRITE |
		((flags & DMAGO_WORD) ? IDS_WDMA : 0);
}

fhpibdone(unit)
{
	register struct hpib_softc *hs = &hpib_softc[unit];
	register struct fhpibdevice *hd;
	register char *addr;
	register int cnt;

	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	cnt = hs->sc_curcnt;
	hs->sc_addr += cnt;
	hs->sc_count -= cnt;
#ifdef DEBUG
	if ((fhpibdebug & FDB_DMA) && fhpibdebugunit == unit)
		printf("fhpibdone: addr %x cnt %d\n",
		       hs->sc_addr, hs->sc_count);
#endif
	if (hs->sc_flags & HPIBF_READ)
		hd->hpib_imask = IM_IDLE | IM_BYTE;
	else {
		cnt = hs->sc_count;
		if (cnt) {
			addr = hs->sc_addr;
			hd->hpib_imask = IM_IDLE | IM_ROOM;
			FHPIBWAIT(hd, IM_IDLE);
			hd->hpib_stat = ST_WRITE;
			while (--cnt) {
				hd->hpib_data = *addr++;
				FHPIBWAIT(hd, IM_ROOM);
			}
			hd->hpib_stat = ST_EOI;
			hd->hpib_data = *addr;
		}
		hd->hpib_imask = IM_IDLE;
	}
	hs->sc_flags |= HPIBF_DONE;
	hd->hpib_stat = ST_IENAB;
	hd->hpib_ie = IDS_IE;
}

fhpibintr(unit)
	register int unit;
{
	register struct hpib_softc *hs = &hpib_softc[unit];
	register struct fhpibdevice *hd;
	register struct devqueue *dq;
	register int stat0;

	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	stat0 = hd->hpib_ids;
	if ((stat0 & (IDS_IE|IDS_IR)) != (IDS_IE|IDS_IR)) {
#ifdef DEBUG
		if ((fhpibdebug & FDB_FAIL) && (stat0 & IDS_IR) &&
		    (hs->sc_flags & (HPIBF_IO|HPIBF_DONE)) != HPIBF_IO)
			printf("hpib%d: fhpibintr: bad status %x\n",
			       unit, stat0);
		fhpibbadint[0]++;
#endif
		return(0);
	}
	if ((hs->sc_flags & (HPIBF_IO|HPIBF_DONE)) == HPIBF_IO) {
#ifdef DEBUG
		fhpibbadint[1]++;
#endif
		return(0);
	}
#ifdef DEBUG
	if ((fhpibdebug & FDB_DMA) && fhpibdebugunit == unit)
		printf("fhpibintr: flags %x\n", hs->sc_flags);
#endif
	dq = hs->sc_sq.dq_forw;
	if (hs->sc_flags & HPIBF_IO) {
		stat0 = hd->hpib_cmd;
		hd->hpib_cmd = fhpibcmd[unit] & ~CT_8BIT;
		hd->hpib_stat = 0;
		hd->hpib_cmd = CT_REN | CT_8BIT;
		stat0 = hd->hpib_intr;
		hd->hpib_imask = 0;
		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) {
		stat0 = hd->hpib_intr;
#ifdef DEBUG
		if ((fhpibdebug & FDB_FAIL) &&
		    doppollint && (stat0 & IM_PPRESP) == 0)
			printf("hpib%d: fhpibintr: bad intr reg %x\n",
			       unit, stat0);
#endif
		hd->hpib_stat = 0;
		hd->hpib_imask = 0;
#ifdef DEBUG
		stat0 = fhpibppoll(unit);
		if ((fhpibdebug & FDB_PPOLL) && unit == fhpibdebugunit)
			printf("fhpibintr: got PPOLL status %x\n", stat0);
		if ((stat0 & (0x80 >> dq->dq_slave)) == 0) {
			printf("fhpibintr: PPOLL: unit %d slave %d stat %x\n",
			       unit, dq->dq_slave, stat0);
			return(1);
		}
#endif
		hs->sc_flags &= ~HPIBF_PPOLL;
		(dq->dq_driver->d_intr)(dq->dq_unit);
	}
	return(1);
}

fhpibppoll(unit)
{
	register struct fhpibdevice *hd;
	register int ppoll;

	hd = (struct fhpibdevice *)hpib_softc[unit].sc_hc->hp_addr;
	hd->hpib_stat = 0;
	hd->hpib_psense = 0;
	hd->hpib_pmask = 0xFF;
	hd->hpib_imask = IM_PPRESP | IM_PABORT;
	DELAY(25);
	hd->hpib_intr = IM_PABORT;
	ppoll = hd->hpib_data;
	if (hd->hpib_intr & IM_PABORT)
		ppoll = 0;
	hd->hpib_imask = 0;
	hd->hpib_pmask = 0;
	hd->hpib_stat = ST_IENAB;
	return(ppoll);
}

fhpibwait(hd, x)
	register struct fhpibdevice *hd;
{
	register int timo = hpibtimeout;

	while ((hd->hpib_intr & x) == 0 && --timo)
		DELAY(1);
	if (timo == 0) {
#ifdef DEBUG
		if (fhpibdebug & FDB_FAIL)
			printf("fhpibwait(%x, %x) timeout\n", hd, x);
#endif
		return(-1);
	}
	return(0);
}

/*
 * XXX: this will have to change if we every allow more than one
 * pending operation per HP-IB.
 */
fhpibppwatch(unit)
{
	register struct hpib_softc *hs = &hpib_softc[unit];
	register struct fhpibdevice *hd;
	register int slave;

	if ((hs->sc_flags & HPIBF_PPOLL) == 0)
		return;
	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	slave = (0x80 >> hs->sc_sq.dq_forw->dq_slave);
#ifdef DEBUG
	if (!doppollint) {
		if (fhpibppoll(unit) & slave) {
			hd->hpib_stat = ST_IENAB;
			hd->hpib_imask = IM_IDLE | IM_ROOM;
		} else
			timeout(fhpibppwatch, unit, 1);
		return;
	}
	if ((fhpibdebug & FDB_PPOLL) && unit == fhpibdebugunit)
		printf("fhpibppwatch: sense request on %d\n", unit);
#endif
	hd->hpib_psense = ~slave;
	hd->hpib_pmask = slave;
	hd->hpib_stat = ST_IENAB;
	hd->hpib_imask = IM_PPRESP | IM_PABORT;
	hd->hpib_ie = IDS_IE;
}
#endif
Commit	Line	Data
60f56dfc KM	1	/*
	2	* Copyright (c) 1982, 1990 The Regents of the University of California.
	3	* All rights reserved.
	4	*
af359dea C	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
60f56dfc	20	*
af359dea C	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
	33	* @(#)fhpib.c 7.3 (Berkeley) 12/16/90
60f56dfc KM	34	*/
	35
	36	/*
	37	* 98625A/B HPIB driver
	38	*/
	39	#include "hpib.h"
	40	#if NHPIB > 0
	41
b28b3a13 KB	42	#include "sys/param.h"
	43	#include "sys/systm.h"
	44	#include "sys/buf.h"
60f56dfc KM	45	#include "device.h"
	46	#include "fhpibreg.h"
	47	#include "hpibvar.h"
	48	#include "dmavar.h"
	49
	50	/*
	51	* Inline version of fhpibwait to be used in places where
	52	* we don't worry about getting hung.
	53	*/
da1e0abb	54	#define FHPIBWAIT(hd, m) while (((hd)->hpib_intr & (m)) == 0) DELAY(1)
60f56dfc KM	55
	56	#ifdef DEBUG
	57	int fhpibdebugunit = -1;
	58	int fhpibdebug = 0;
	59	#define FDB_FAIL 0x01
	60	#define FDB_DMA 0x02
	61	#define FDB_WAIT 0x04
	62	#define FDB_PPOLL 0x08
	63
	64	int dopriodma = 0; /* use high priority DMA */
	65	int doworddma = 1; /* non-zero if we should attempt word dma */
60f56dfc KM	66	int doppollint = 1; /* use ppoll interrupts instead of watchdog */
	67
	68	long fhpibbadint[2] = { 0 };
	69	long fhpibtransfer[NHPIB] = { 0 };
	70	long fhpibnondma[NHPIB] = { 0 };
	71	long fhpibworddma[NHPIB] = { 0 };
60f56dfc KM	72	#endif
	73
	74	int fhpibcmd[NHPIB];
60f56dfc KM	75
	76	fhpibtype(hc)
	77	register struct hp_ctlr *hc;
	78	{
	79	register struct hpib_softc *hs = &hpib_softc[hc->hp_unit];
	80	register struct fhpibdevice hd = (struct fhpibdevice )hc->hp_addr;
	81
	82	if (hd->hpib_cid != HPIBC)
	83	return(0);
	84	hs->sc_type = HPIBC;
	85	hs->sc_ba = HPIBC_BA;
	86	hc->hp_ipl = HPIB_IPL(hd->hpib_ids);
	87	return(1);
	88	}
	89
	90	fhpibreset(unit)
	91	{
	92	register struct hpib_softc *hs = &hpib_softc[unit];
	93	register struct fhpibdevice *hd;
	94
	95	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	96	hd->hpib_cid = 0xFF;
	97	DELAY(100);
	98	hd->hpib_cmd = CT_8BIT;
	99	hd->hpib_ar = AR_ARONC;
	100	fhpibifc(hd);
	101	hd->hpib_ie = IDS_IE;
	102	hd->hpib_data = C_DCL;
	103	DELAY(100000);
	104	/*
	105	* See if we can do word dma.
	106	* If so, we should be able to write and read back the appropos bit.
	107	*/
	108	hd->hpib_ie \|= IDS_WDMA;
	109	if (hd->hpib_ie & IDS_WDMA) {
	110	hd->hpib_ie &= ~IDS_WDMA;
	111	hs->sc_flags \|= HPIBF_DMA16;
	112	#ifdef DEBUG
	113	if (fhpibdebug & FDB_DMA)
	114	printf("fhpibtype: unit %d has word dma\n", unit);
	115
	116	#endif
	117	}
	118	}
	119
	120	fhpibifc(hd)
	121	register struct fhpibdevice *hd;
	122	{
	123	hd->hpib_cmd \|= CT_IFC;
	124	hd->hpib_cmd \|= CT_INITFIFO;
	125	DELAY(100);
	126	hd->hpib_cmd &= ~CT_IFC;
	127	hd->hpib_cmd \|= CT_REN;
	128	hd->hpib_stat = ST_ATN;
	129	}
	130
da1e0abb	131	fhpibsend(unit, slave, sec, addr, origcnt)
60f56dfc	132	register char *addr;
60f56dfc KM	133	{
	134	register struct hpib_softc *hs = &hpib_softc[unit];
	135	register struct fhpibdevice *hd;
da1e0abb	136	register int cnt = origcnt;
60f56dfc	137	register int timo;
60f56dfc KM	138
	139	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	140	hd->hpib_stat = 0;
	141	hd->hpib_imask = IM_IDLE \| IM_ROOM;
	142	if (fhpibwait(hd, IM_IDLE) < 0)
da1e0abb	143	goto senderr;
60f56dfc KM	144	hd->hpib_stat = ST_ATN;
	145	hd->hpib_data = C_UNL;
	146	hd->hpib_data = C_TAG + hs->sc_ba;
	147	hd->hpib_data = C_LAG + slave;
	148	if (sec != -1)
	149	hd->hpib_data = C_SCG + sec;
	150	if (fhpibwait(hd, IM_IDLE) < 0)
da1e0abb KM	151	goto senderr;
	152	if (cnt) {
	153	hd->hpib_stat = ST_WRITE;
60f56dfc KM	154	while (--cnt) {
	155	hd->hpib_data = *addr++;
	156	timo = hpibtimeout;
da1e0abb KM	157	while ((hd->hpib_intr & IM_ROOM) == 0) {
	158	if (--timo <= 0)
	159	goto senderr;
	160	DELAY(1);
	161	}
60f56dfc KM	162	}
	163	hd->hpib_stat = ST_EOI;
	164	hd->hpib_data = *addr;
	165	FHPIBWAIT(hd, IM_ROOM);
	166	hd->hpib_stat = ST_ATN;
	167	/* XXX: HP-UX claims bug with CS80 transparent messages */
	168	if (sec == 0x12)
	169	DELAY(150);
	170	hd->hpib_data = C_UNL;
da1e0abb	171	(void) fhpibwait(hd, IM_IDLE);
60f56dfc	172	}
da1e0abb KM	173	hd->hpib_imask = 0;
	174	return (origcnt);
	175	senderr:
	176	hd->hpib_imask = 0;
	177	fhpibifc(hd);
60f56dfc	178	#ifdef DEBUG
da1e0abb KM	179	if (fhpibdebug & FDB_FAIL) {
	180	printf("hpib%d: fhpibsend failed: slave %d, sec %x, ",
	181	unit, slave, sec);
	182	printf("sent %d of %d bytes\n", origcnt-cnt-1, origcnt);
60f56dfc	183	}
da1e0abb KM	184	#endif
da1e0abb KM	185	return(origcnt - cnt - 1);
60f56dfc KM	186	}
60f56dfc KM	187
da1e0abb	188	fhpibrecv(unit, slave, sec, addr, origcnt)
60f56dfc	189	register char *addr;
60f56dfc KM	190	{
	191	register struct hpib_softc *hs = &hpib_softc[unit];
	192	register struct fhpibdevice *hd;
da1e0abb	193	register int cnt = origcnt;
60f56dfc	194	register int timo;
60f56dfc KM	195
	196	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	197	hd->hpib_stat = 0;
	198	hd->hpib_imask = IM_IDLE \| IM_ROOM \| IM_BYTE;
	199	if (fhpibwait(hd, IM_IDLE) < 0)
da1e0abb	200	goto recverror;
60f56dfc KM	201	hd->hpib_stat = ST_ATN;
	202	hd->hpib_data = C_UNL;
	203	hd->hpib_data = C_LAG + hs->sc_ba;
	204	hd->hpib_data = C_TAG + slave;
	205	if (sec != -1)
	206	hd->hpib_data = C_SCG + sec;
	207	if (fhpibwait(hd, IM_IDLE) < 0)
da1e0abb	208	goto recverror;
60f56dfc KM	209	hd->hpib_stat = ST_READ0;
60f56dfc KM	210	hd->hpib_data = 0;
da1e0abb KM	211	if (cnt) {
da1e0abb KM	212	while (--cnt >= 0) {
60f56dfc	213	timo = hpibtimeout;
da1e0abb KM	214	while ((hd->hpib_intr & IM_BYTE) == 0) {
	215	if (--timo == 0)
	216	goto recvbyteserror;
	217	DELAY(1);
	218	}
60f56dfc	219	*addr++ = hd->hpib_data;
da1e0abb	220	}
60f56dfc KM	221	FHPIBWAIT(hd, IM_ROOM);
	222	hd->hpib_stat = ST_ATN;
	223	hd->hpib_data = (slave == 31) ? C_UNA : C_UNT;
da1e0abb	224	(void) fhpibwait(hd, IM_IDLE);
60f56dfc	225	}
da1e0abb KM	226	hd->hpib_imask = 0;
	227	return (origcnt);
	228
	229	recverror:
	230	fhpibifc(hd);
	231	recvbyteserror:
	232	hd->hpib_imask = 0;
60f56dfc	233	#ifdef DEBUG
da1e0abb KM	234	if (fhpibdebug & FDB_FAIL) {
	235	printf("hpib%d: fhpibrecv failed: slave %d, sec %x, ",
	236	unit, slave, sec);
	237	printf("got %d of %d bytes\n", origcnt-cnt-1, origcnt);
60f56dfc	238	}
da1e0abb KM	239	#endif
da1e0abb KM	240	return(origcnt - cnt - 1);
60f56dfc KM	241	}
	242
	243	fhpibgo(unit, slave, sec, addr, count, rw)
	244	register int unit;
	245	char *addr;
	246	{
	247	register struct hpib_softc *hs = &hpib_softc[unit];
	248	register struct fhpibdevice *hd;
	249	register int i;
	250	int flags = 0;
	251
	252	#ifdef lint
	253	i = unit; if (i) return;
	254	#endif
	255	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	256	hs->sc_flags \|= HPIBF_IO;
	257	if (rw == B_READ)
	258	hs->sc_flags \|= HPIBF_READ;
	259	#ifdef DEBUG
	260	else if (hs->sc_flags & HPIBF_READ) {
	261	printf("fhpibgo: HPIBF_READ still set\n");
	262	hs->sc_flags &= ~HPIBF_READ;
	263	}
	264	#endif
	265	hs->sc_count = count;
	266	hs->sc_addr = addr;
	267	#ifdef DEBUG
	268	fhpibtransfer[unit]++;
	269	#endif
	270	if ((hs->sc_flags & HPIBF_DMA16) &&
	271	((int)addr & 1) == 0 && count && (count & 1) == 0
	272	#ifdef DEBUG
	273	&& doworddma
	274	#endif
	275	) {
	276	#ifdef DEBUG
	277	fhpibworddma[unit]++;
	278	#endif
	279	flags \|= DMAGO_WORD;
	280	hd->hpib_latch = 0;
	281	}
	282	#ifdef DEBUG
	283	if (dopriodma)
	284	flags \|= DMAGO_PRI;
	285	#endif
	286	if (hs->sc_flags & HPIBF_READ) {
	287	fhpibcmd[unit] = CT_REN \| CT_8BIT;
	288	hs->sc_curcnt = count;
	289	dmago(hs->sc_dq.dq_ctlr, addr, count, flags\|DMAGO_READ);
	290	if (fhpibrecv(unit, slave, sec, 0, 0) < 0) {
	291	#ifdef DEBUG
	292	printf("fhpibgo: recv failed, retrying...\n");
	293	#endif
	294	(void) fhpibrecv(unit, slave, sec, 0, 0);
	295	}
	296	i = hd->hpib_cmd;
	297	hd->hpib_cmd = fhpibcmd[unit];
	298	hd->hpib_ie = IDS_DMA(hs->sc_dq.dq_ctlr) \|
	299	((flags & DMAGO_WORD) ? IDS_WDMA : 0);
	300	return;
	301	}
	302	fhpibcmd[unit] = CT_REN \| CT_8BIT \| CT_FIFOSEL;
da1e0abb	303	if (count < hpibdmathresh) {
60f56dfc KM	304	#ifdef DEBUG
60f56dfc KM	305	fhpibnondma[unit]++;
da1e0abb KM	306	if (flags & DMAGO_WORD)
da1e0abb KM	307	fhpibworddma[unit]--;
60f56dfc KM	308	#endif
	309	hs->sc_curcnt = count;
	310	(void) fhpibsend(unit, slave, sec, addr, count);
	311	fhpibdone(unit);
	312	return;
	313	}
	314	count -= (flags & DMAGO_WORD) ? 2 : 1;
	315	hs->sc_curcnt = count;
	316	dmago(hs->sc_dq.dq_ctlr, addr, count, flags);
	317	if (fhpibsend(unit, slave, sec, 0, 0) < 0) {
	318	#ifdef DEBUG
	319	printf("fhpibgo: send failed, retrying...\n");
	320	#endif
	321	(void) fhpibsend(unit, slave, sec, 0, 0);
	322	}
	323	i = hd->hpib_cmd;
	324	hd->hpib_cmd = fhpibcmd[unit];
	325	hd->hpib_ie = IDS_DMA(hs->sc_dq.dq_ctlr) \| IDS_WRITE \|
	326	((flags & DMAGO_WORD) ? IDS_WDMA : 0);
	327	}
	328
	329	fhpibdone(unit)
	330	{
	331	register struct hpib_softc *hs = &hpib_softc[unit];
	332	register struct fhpibdevice *hd;
	333	register char *addr;
	334	register int cnt;
	335
	336	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	337	cnt = hs->sc_curcnt;
	338	hs->sc_addr += cnt;
	339	hs->sc_count -= cnt;
	340	#ifdef DEBUG
	341	if ((fhpibdebug & FDB_DMA) && fhpibdebugunit == unit)
	342	printf("fhpibdone: addr %x cnt %d\n",
	343	hs->sc_addr, hs->sc_count);
	344	#endif
	345	if (hs->sc_flags & HPIBF_READ)
	346	hd->hpib_imask = IM_IDLE \| IM_BYTE;
	347	else {
	348	cnt = hs->sc_count;
	349	if (cnt) {
	350	addr = hs->sc_addr;
	351	hd->hpib_imask = IM_IDLE \| IM_ROOM;
60f56dfc	352	FHPIBWAIT(hd, IM_IDLE);
60f56dfc KM	353	hd->hpib_stat = ST_WRITE;
	354	while (--cnt) {
	355	hd->hpib_data = *addr++;
	356	FHPIBWAIT(hd, IM_ROOM);
	357	}
	358	hd->hpib_stat = ST_EOI;
	359	hd->hpib_data = *addr;
	360	}
	361	hd->hpib_imask = IM_IDLE;
	362	}
	363	hs->sc_flags \|= HPIBF_DONE;
	364	hd->hpib_stat = ST_IENAB;
	365	hd->hpib_ie = IDS_IE;
	366	}
	367
	368	fhpibintr(unit)
	369	register int unit;
	370	{
	371	register struct hpib_softc *hs = &hpib_softc[unit];
	372	register struct fhpibdevice *hd;
	373	register struct devqueue *dq;
	374	register int stat0;
	375
	376	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	377	stat0 = hd->hpib_ids;
	378	if ((stat0 & (IDS_IE\|IDS_IR)) != (IDS_IE\|IDS_IR)) {
	379	#ifdef DEBUG
	380	if ((fhpibdebug & FDB_FAIL) && (stat0 & IDS_IR) &&
	381	(hs->sc_flags & (HPIBF_IO\|HPIBF_DONE)) != HPIBF_IO)
	382	printf("hpib%d: fhpibintr: bad status %x\n",
	383	unit, stat0);
	384	fhpibbadint[0]++;
	385	#endif
	386	return(0);
	387	}
	388	if ((hs->sc_flags & (HPIBF_IO\|HPIBF_DONE)) == HPIBF_IO) {
	389	#ifdef DEBUG
	390	fhpibbadint[1]++;
	391	#endif
	392	return(0);
	393	}
	394	#ifdef DEBUG
	395	if ((fhpibdebug & FDB_DMA) && fhpibdebugunit == unit)
	396	printf("fhpibintr: flags %x\n", hs->sc_flags);
	397	#endif
	398	dq = hs->sc_sq.dq_forw;
	399	if (hs->sc_flags & HPIBF_IO) {
	400	stat0 = hd->hpib_cmd;
	401	hd->hpib_cmd = fhpibcmd[unit] & ~CT_8BIT;
	402	hd->hpib_stat = 0;
	403	hd->hpib_cmd = CT_REN \| CT_8BIT;
	404	stat0 = hd->hpib_intr;
	405	hd->hpib_imask = 0;
	406	hs->sc_flags &= ~(HPIBF_DONE\|HPIBF_IO\|HPIBF_READ);
	407	dmafree(&hs->sc_dq);
	408	(dq->dq_driver->d_intr)(dq->dq_unit);
	409	} else if (hs->sc_flags & HPIBF_PPOLL) {
	410	stat0 = hd->hpib_intr;
	411	#ifdef DEBUG
	412	if ((fhpibdebug & FDB_FAIL) &&
	413	doppollint && (stat0 & IM_PPRESP) == 0)
	414	printf("hpib%d: fhpibintr: bad intr reg %x\n",
	415	unit, stat0);
	416	#endif
417	hd->hpib_stat = 0;
418	hd->hpib_imask = 0;
419	#ifdef DEBUG
420	stat0 = fhpibppoll(unit);
421	if ((fhpibdebug & FDB_PPOLL) && unit == fhpibdebugunit)
422	printf("fhpibintr: got PPOLL status %x\n", stat0);
423	if ((stat0 & (0x80 >> dq->dq_slave)) == 0) {
424	printf("fhpibintr: PPOLL: unit %d slave %d stat %x\n",
425	unit, dq->dq_slave, stat0);
426	return(1);
427	}
428	#endif
429	hs->sc_flags &= ~HPIBF_PPOLL;
430	(dq->dq_driver->d_intr)(dq->dq_unit);
431	}
432	return(1);
433	}
434
435	fhpibppoll(unit)
436	{
437	register struct fhpibdevice *hd;
438	register int ppoll;
439
440	hd = (struct fhpibdevice *)hpib_softc[unit].sc_hc->hp_addr;
441	hd->hpib_stat = 0;
442	hd->hpib_psense = 0;
443	hd->hpib_pmask = 0xFF;
444	hd->hpib_imask = IM_PPRESP \| IM_PABORT;
445	DELAY(25);
446	hd->hpib_intr = IM_PABORT;
447	ppoll = hd->hpib_data;
448	if (hd->hpib_intr & IM_PABORT)
449	ppoll = 0;
450	hd->hpib_imask = 0;
451	hd->hpib_pmask = 0;
452	hd->hpib_stat = ST_IENAB;
453	return(ppoll);
454	}
455
456	fhpibwait(hd, x)
457	register struct fhpibdevice *hd;
458	{
459	register int timo = hpibtimeout;
460
461	while ((hd->hpib_intr & x) == 0 && --timo)
da1e0abb	462	DELAY(1);
60f56dfc KM	463	if (timo == 0) {
	464	#ifdef DEBUG
	465	if (fhpibdebug & FDB_FAIL)
	466	printf("fhpibwait(%x, %x) timeout\n", hd, x);
	467	#endif
	468	return(-1);
	469	}
	470	return(0);
	471	}
	472
	473	/*
	474	* XXX: this will have to change if we every allow more than one
	475	* pending operation per HP-IB.
	476	*/
	477	fhpibppwatch(unit)
	478	{
	479	register struct hpib_softc *hs = &hpib_softc[unit];
	480	register struct fhpibdevice *hd;
	481	register int slave;
	482
	483	if ((hs->sc_flags & HPIBF_PPOLL) == 0)
	484	return;
	485	hd = (struct fhpibdevice *)hs->sc_hc->hp_addr;
	486	slave = (0x80 >> hs->sc_sq.dq_forw->dq_slave);
	487	#ifdef DEBUG
	488	if (!doppollint) {
	489	if (fhpibppoll(unit) & slave) {
	490	hd->hpib_stat = ST_IENAB;
	491	hd->hpib_imask = IM_IDLE \| IM_ROOM;
	492	} else
	493	timeout(fhpibppwatch, unit, 1);
	494	return;
	495	}
	496	if ((fhpibdebug & FDB_PPOLL) && unit == fhpibdebugunit)
	497	printf("fhpibppwatch: sense request on %d\n", unit);
	498	#endif
	499	hd->hpib_psense = ~slave;
	500	hd->hpib_pmask = slave;
	501	hd->hpib_stat = ST_IENAB;
	502	hd->hpib_imask = IM_PPRESP \| IM_PABORT;
	503	hd->hpib_ie = IDS_IE;
	504	}
	505	#endif