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

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/* $NetBSD: nhpib.c,v 1.14 1997/01/30 09:06:54 thorpej Exp $ */
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/*
* Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved.
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* 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.
*
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* @(#)nhpib.c 8.2 (Berkeley) 1/12/94
*/
/*
* Internal/98624 HPIB driver
*/
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#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
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#include <sys/buf.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <hp300/hp300/isr.h>
#include <hp300/dev/dioreg.h>
#include <hp300/dev/diovar.h>
#include <hp300/dev/diodevs.h>
#include <hp300/dev/dmavar.h>
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#include <hp300/dev/nhpibreg.h>
#include <hp300/dev/hpibvar.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 nhpibifc __P((struct nhpibdevice *));
void nhpibreadtimo __P((void *));
int nhpibwait __P((struct nhpibdevice *, int));
void nhpibreset __P((struct hpibbus_softc *));
int nhpibsend __P((struct hpibbus_softc *, int, int, void *, int));
int nhpibrecv __P((struct hpibbus_softc *, int, int, void *, int));
int nhpibppoll __P((struct hpibbus_softc *));
void nhpibppwatch __P((void *));
void nhpibgo __P((struct hpibbus_softc *, int, int, void *, int, int, int));
void nhpibdone __P((struct hpibbus_softc *));
int nhpibintr __P((void *));
/*
* Our controller ops structure.
*/
struct hpib_controller nhpib_controller = {
nhpibreset,
nhpibsend,
nhpibrecv,
nhpibppoll,
nhpibppwatch,
nhpibgo,
nhpibdone,
nhpibintr
};
struct nhpib_softc {
struct device sc_dev; /* generic device glue */
struct nhpibdevice *sc_regs; /* device registers */
struct hpibbus_softc *sc_hpibbus; /* XXX */
};
int nhpibmatch __P((struct device *, struct cfdata *, void *));
void nhpibattach __P((struct device *, struct device *, void *));
struct cfattach nhpib_ca = {
sizeof(struct nhpib_softc), nhpibmatch, nhpibattach
};
struct cfdriver nhpib_cd = {
NULL, "nhpib", DV_DULL
};
int
nhpibmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct dio_attach_args *da = aux;
/*
* Internal HP-IB doesn't always return a device ID,
* so we rely on the sysflags.
*/
if (da->da_scode == 7 && internalhpib)
return (1);
if (da->da_id == DIO_DEVICE_ID_NHPIB)
return (1);
return (0);
}
void
nhpibattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct nhpib_softc *sc = (struct nhpib_softc *)self;
struct dio_attach_args *da = aux;
struct hpibdev_attach_args ha;
const char *desc;
int ipl, type = HPIBA;
sc->sc_regs = (struct nhpibdevice *)iomap(dio_scodetopa(da->da_scode),
da->da_size);
if (sc->sc_regs == NULL) {
printf("\n%s: can't map registers\n", self->dv_xname);
return;
}
ipl = DIO_IPL(sc->sc_regs);
if (da->da_scode == 7 && internalhpib)
desc = DIO_DEVICE_DESC_IHPIB;
else if (da->da_id == DIO_DEVICE_ID_NHPIB) {
type = HPIBB;
desc = DIO_DEVICE_DESC_NHPIB;
} else
desc = "unknown HP-IB!";
printf(" ipl %d: %s\n", ipl, desc);
/* Establish the interrupt handler. */
(void) isrlink(nhpibintr, sc, ipl, ISRPRI_BIO);
dmacomputeipl();
ha.ha_ops = &nhpib_controller;
ha.ha_type = type; /* XXX */
ha.ha_ba = (type == HPIBA) ? HPIBA_BA :
(sc->sc_regs->hpib_csa & CSA_BA);
ha.ha_softcpp = &sc->sc_hpibbus; /* XXX */
(void)config_found(self, &ha, hpibdevprint);
}
void
nhpibreset(hs)
struct hpibbus_softc *hs;
{
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
struct nhpibdevice *hd = sc->sc_regs;
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);
}
void
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(hs, slave, sec, ptr, origcnt)
struct hpibbus_softc *hs;
int slave, sec, origcnt;
void *ptr;
{
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
struct nhpibdevice *hd = sc->sc_regs;
int cnt = origcnt;
char *addr = ptr;
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(hs, slave, sec, ptr, origcnt)
struct hpibbus_softc *hs;
int slave, sec, origcnt;
void *ptr;
{
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
struct nhpibdevice *hd = sc->sc_regs;
int cnt = origcnt;
char *addr = ptr;
/*
* 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(hs, slave, sec, ptr, count, rw, timo)
struct hpibbus_softc *hs;
int slave, sec, count, rw, timo;
void *ptr;
{
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
struct nhpibdevice *hd = sc->sc_regs;
char *addr = ptr;
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) {
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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_chan, addr, count, DMAGO_BYTE|DMAGO_READ);
nhpibrecv(hs, slave, sec, 0, 0);
hd->hpib_mim = MIS_END;
} else {
hd->hpib_mim = 0;
if (count < hpibdmathresh) {
hs->sc_curcnt = count;
nhpibsend(hs, slave, sec, addr, count);
nhpibdone(hs);
return;
}
hs->sc_curcnt = --count;
dmago(hs->sc_dq->dq_chan, addr, count, DMAGO_BYTE);
nhpibsend(hs, slave, sec, 0, 0);
}
hd->hpib_ie = IDS_IE | IDS_DMA(hs->sc_dq->dq_chan);
}
/*
* 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;
{
struct hpibbus_softc *hs = arg;
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
int s = splbio();
if (hs->sc_flags & HPIBF_IO) {
register struct nhpibdevice *hd = sc->sc_regs;
register struct hpibqueue *hq;
hd->hpib_mim = 0;
hd->hpib_acr = AUX_TCA;
hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO);
dmafree(hs->sc_dq);
hq = hs->sc_queue.tqh_first;
(hq->hq_intr)(hq->hq_softc);
}
splx(s);
}
void
nhpibdone(hs)
struct hpibbus_softc *hs;
{
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
struct nhpibdevice *hd = sc->sc_regs;
int cnt;
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, hs, 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(arg)
void *arg;
{
struct nhpib_softc *sc = arg;
struct hpibbus_softc *hs = sc->sc_hpibbus;
struct nhpibdevice *hd = sc->sc_regs;
struct hpibqueue *hq;
int stat0;
int stat1;
#ifdef lint
if (stat1 = unit) return(1);
#endif
if ((hd->hpib_ids & IDS_IR) == 0)
return(0);
stat0 = hd->hpib_mis;
stat1 = hd->hpib_lis;
hq = hs->sc_queue.tqh_first;
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_chan);
} else if (hs->sc_flags & HPIBF_TIMO)
untimeout(nhpibreadtimo, hs);
hd->hpib_acr = AUX_TCA;
hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO);
dmafree(hs->sc_dq);
(hq->hq_intr)(hq->hq_softc);
} else if (hs->sc_flags & HPIBF_PPOLL) {
hd->hpib_mim = 0;
stat0 = nhpibppoll(hs);
if (stat0 & (0x80 >> hq->hq_slave)) {
hs->sc_flags &= ~HPIBF_PPOLL;
(hq->hq_intr)(hq->hq_softc);
}
#ifdef DEBUG
else
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printf("%s: PPOLL intr bad status %x\n",
hs->sc_dev.dv_xname, stat0);
#endif
}
return(1);
}
int
nhpibppoll(hs)
struct hpibbus_softc *hs;
{
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
struct nhpibdevice *hd = sc->sc_regs;
int ppoll;
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;
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int x;
{
register int timo = hpibtimeout;
while ((hd->hpib_mis & x) == 0 && --timo)
DELAY(1);
if (timo == 0) {
#ifdef DEBUG
if (nhpibreporttimo)
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printf("hpib0: %s timo\n", x==MIS_BO?"OUT":"IN");
#endif
return(-1);
}
return(0);
}
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void
nhpibppwatch(arg)
void *arg;
{
struct hpibbus_softc *hs = arg;
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
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extern int cold;
if ((hs->sc_flags & HPIBF_PPOLL) == 0)
return;
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again:
if (nhpibppoll(hs) & (0x80 >> hs->sc_queue.tqh_first->hq_slave))
sc->sc_regs->hpib_mim = MIS_BO;
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else if (cold)
/* timeouts not working yet */
goto again;
else
timeout(nhpibppwatch, hs, 1);
}