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

508 lines
12 KiB
C

/* $NetBSD: nhpib.c,v 1.8 1995/12/02 18:22:06 thorpej Exp $ */
/*
* 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.
*
* @(#)nhpib.c 8.2 (Berkeley) 1/12/94
*/
/*
* Internal/98624 HPIB driver
*/
#include "hpib.h"
#if NHPIB > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.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>
/*
* ODD parity table for listen and talk addresses and secondary commands.
* The TI9914A doesn't produce the parity bit.
*/
static u_char listnr_par[] = {
0040,0241,0242,0043,0244,0045,0046,0247,
0250,0051,0052,0253,0054,0255,0256,0057,
0260,0061,0062,0263,0064,0265,0266,0067,
0070,0271,0272,0073,0274,0075,0076,0277,
};
static u_char talker_par[] = {
0100,0301,0302,0103,0304,0105,0106,0307,
0310,0111,0112,0313,0114,0315,0316,0117,
0320,0121,0122,0323,0124,0325,0326,0127,
0130,0331,0332,0133,0334,0135,0136,0337,
};
static u_char sec_par[] = {
0340,0141,0142,0343,0144,0345,0346,0147,
0150,0351,0352,0153,0354,0155,0156,0357,
0160,0361,0362,0163,0364,0165,0166,0367,
0370,0171,0172,0373,0174,0375,0376,0177
};
void nhpibreset __P((int));
int nhpibsend __P((int, int, int, void *, int));
int nhpibrecv __P((int, int, int, void *, int));
int nhpibppoll __P((int));
void nhpibppwatch __P((void *));
void nhpibgo __P((int, int, int, void *, int, int, int));
void nhpibdone __P((int));
int nhpibintr __P((int));
/*
* Our controller ops structure.
*/
struct hpib_controller nhpib_controller = {
nhpibreset,
nhpibsend,
nhpibrecv,
nhpibppoll,
nhpibppwatch,
nhpibgo,
nhpibdone,
nhpibintr
};
int
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;
hc->hp_ipl = HPIBA_IPL;
return (1);
} else if (hd->hpib_cid == HPIBB) {
hs->sc_type = HPIBB;
hc->hp_ipl = HPIB_IPL(hd->hpib_ids);
return (1);
}
return(0);
}
void
nhpibattach(hc)
register struct hp_ctlr *hc;
{
struct hpib_softc *hs = &hpib_softc[hc->hp_unit];
register struct nhpibdevice *hd = (struct nhpibdevice *)hc->hp_addr;
switch (hs->sc_type) {
case HPIBA:
hs->sc_ba = HPIBA_BA;
hs->sc_descrip = "Internal HP-IB";
break;
case HPIBB:
hs->sc_ba = hd->hpib_csa & CSA_BA;
hs->sc_descrip = "98624 HP-IB";
break;
default:
panic("nhpibattach: unknown type 0x%x", hs->sc_type);
/* NOTREACHED */
}
hs->sc_controller = &nhpib_controller;
}
void
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_P;
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;
}
int
nhpibsend(unit, slave, sec, ptr, origcnt)
int unit, slave, sec, origcnt;
void *ptr;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int cnt = origcnt;
char *addr = ptr;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL_P;
if (nhpibwait(hd, MIS_BO))
goto senderror;
hd->hpib_data = talker_par[hs->sc_ba];
hd->hpib_acr = AUX_STON;
if (nhpibwait(hd, MIS_BO))
goto senderror;
hd->hpib_data = listnr_par[slave];
if (nhpibwait(hd, MIS_BO))
goto senderror;
if (sec >= 0 || sec == -2) {
if (sec == -2) /* selected device clear KLUDGE */
hd->hpib_data = C_SDC_P;
else
hd->hpib_data = sec_par[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_P;
(void) nhpibwait(hd, MIS_BO);
#endif
}
return(origcnt);
senderror:
nhpibifc(hd);
return(origcnt - cnt - 1);
}
int
nhpibrecv(unit, slave, sec, ptr, origcnt)
int unit, slave, sec, origcnt;
void *ptr;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int cnt = origcnt;
char *addr = ptr;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
/*
* Slave < 0 implies continuation of a previous receive
* that probably timed out.
*/
if (slave >= 0) {
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL_P;
if (nhpibwait(hd, MIS_BO))
goto recverror;
hd->hpib_data = listnr_par[hs->sc_ba];
hd->hpib_acr = AUX_SLON;
if (nhpibwait(hd, MIS_BO))
goto recverror;
hd->hpib_data = talker_par[slave];
if (nhpibwait(hd, MIS_BO))
goto recverror;
if (sec >= 0) {
hd->hpib_data = sec_par[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_P : C_UNT_P;
(void) nhpibwait(hd, MIS_BO);
}
return(origcnt);
recverror:
nhpibifc(hd);
recvbyteserror:
return(origcnt - cnt - 1);
}
void
nhpibgo(unit, slave, sec, ptr, count, rw, timo)
int unit, slave, sec, count, rw, timo;
void *ptr;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
char *addr = ptr;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hs->sc_flags |= HPIBF_IO;
if (timo)
hs->sc_flags |= HPIBF_TIMO;
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);
}
/*
* This timeout can only happen if a DMA read finishes DMAing with the read
* still pending (more data in read transaction than the driver was prepared
* to accept). At the moment, variable-record tape drives are the only things
* capabale of doing this. We repeat the necessary code from nhpibintr() -
* easier and quicker than calling nhpibintr() for this special case.
*/
void
nhpibreadtimo(arg)
void *arg;
{
int unit;
register struct hpib_softc *hs;
int s = splbio();
unit = (int)arg;
hs = &hpib_softc[unit];
if (hs->sc_flags & HPIBF_IO) {
register struct nhpibdevice *hd;
register struct devqueue *dq;
hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
hd->hpib_mim = 0;
hd->hpib_acr = AUX_TCA;
hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO);
dmafree(&hs->sc_dq);
dq = hs->sc_sq.dq_forw;
(dq->dq_driver->d_intr)(dq->dq_unit);
}
(void) splx(s);
}
void
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) {
if ((hs->sc_flags & HPIBF_TIMO) &&
(hd->hpib_ids & IDS_IR) == 0)
timeout(nhpibreadtimo, (void *)unit, hz >> 2);
} else {
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
}
}
int
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) {
hs->sc_flags &= ~HPIBF_TIMO;
dmastop(hs->sc_dq.dq_ctlr);
} else if (hs->sc_flags & HPIBF_TIMO)
untimeout(nhpibreadtimo, (void *)unit);
hd->hpib_acr = AUX_TCA;
hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO);
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("%s: PPOLL intr bad status %x\n",
hs->sc_hc->hp_xname, stat0);
#endif
}
return(1);
}
int
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);
}
#ifdef DEBUG
int nhpibreporttimo = 0;
#endif
int
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) {
#ifdef DEBUG
if (nhpibreporttimo)
printf("hpib0: %s timo\n", x==MIS_BO?"OUT":"IN");
#endif
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 /* NHPIB > 0 */