551 lines
13 KiB
C
551 lines
13 KiB
C
/* $NetBSD: nhpib.c,v 1.14 1997/01/30 09:06:54 thorpej Exp $ */
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/*
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* Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved.
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* Copyright (c) 1982, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nhpib.c 8.2 (Berkeley) 1/12/94
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*/
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/*
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* Internal/98624 HPIB driver
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/buf.h>
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#include <sys/device.h>
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#include <machine/autoconf.h>
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#include <hp300/hp300/isr.h>
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#include <hp300/dev/dioreg.h>
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#include <hp300/dev/diovar.h>
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#include <hp300/dev/diodevs.h>
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#include <hp300/dev/dmavar.h>
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#include <hp300/dev/nhpibreg.h>
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#include <hp300/dev/hpibvar.h>
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/*
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* ODD parity table for listen and talk addresses and secondary commands.
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* The TI9914A doesn't produce the parity bit.
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*/
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static u_char listnr_par[] = {
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0040,0241,0242,0043,0244,0045,0046,0247,
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0250,0051,0052,0253,0054,0255,0256,0057,
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0260,0061,0062,0263,0064,0265,0266,0067,
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0070,0271,0272,0073,0274,0075,0076,0277,
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};
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static u_char talker_par[] = {
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0100,0301,0302,0103,0304,0105,0106,0307,
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0310,0111,0112,0313,0114,0315,0316,0117,
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0320,0121,0122,0323,0124,0325,0326,0127,
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0130,0331,0332,0133,0334,0135,0136,0337,
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};
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static u_char sec_par[] = {
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0340,0141,0142,0343,0144,0345,0346,0147,
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0150,0351,0352,0153,0354,0155,0156,0357,
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0160,0361,0362,0163,0364,0165,0166,0367,
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0370,0171,0172,0373,0174,0375,0376,0177
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};
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void nhpibifc __P((struct nhpibdevice *));
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void nhpibreadtimo __P((void *));
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int nhpibwait __P((struct nhpibdevice *, int));
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void nhpibreset __P((struct hpibbus_softc *));
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int nhpibsend __P((struct hpibbus_softc *, int, int, void *, int));
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int nhpibrecv __P((struct hpibbus_softc *, int, int, void *, int));
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int nhpibppoll __P((struct hpibbus_softc *));
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void nhpibppwatch __P((void *));
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void nhpibgo __P((struct hpibbus_softc *, int, int, void *, int, int, int));
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void nhpibdone __P((struct hpibbus_softc *));
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int nhpibintr __P((void *));
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/*
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* Our controller ops structure.
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*/
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struct hpib_controller nhpib_controller = {
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nhpibreset,
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nhpibsend,
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nhpibrecv,
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nhpibppoll,
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nhpibppwatch,
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nhpibgo,
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nhpibdone,
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nhpibintr
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};
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struct nhpib_softc {
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struct device sc_dev; /* generic device glue */
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struct nhpibdevice *sc_regs; /* device registers */
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struct hpibbus_softc *sc_hpibbus; /* XXX */
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};
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int nhpibmatch __P((struct device *, struct cfdata *, void *));
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void nhpibattach __P((struct device *, struct device *, void *));
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struct cfattach nhpib_ca = {
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sizeof(struct nhpib_softc), nhpibmatch, nhpibattach
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};
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struct cfdriver nhpib_cd = {
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NULL, "nhpib", DV_DULL
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};
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int
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nhpibmatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct dio_attach_args *da = aux;
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/*
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* Internal HP-IB doesn't always return a device ID,
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* so we rely on the sysflags.
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*/
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if (da->da_scode == 7 && internalhpib)
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return (1);
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if (da->da_id == DIO_DEVICE_ID_NHPIB)
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return (1);
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return (0);
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}
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void
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nhpibattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct nhpib_softc *sc = (struct nhpib_softc *)self;
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struct dio_attach_args *da = aux;
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struct hpibdev_attach_args ha;
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const char *desc;
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int ipl, type = HPIBA;
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sc->sc_regs = (struct nhpibdevice *)iomap(dio_scodetopa(da->da_scode),
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da->da_size);
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if (sc->sc_regs == NULL) {
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printf("\n%s: can't map registers\n", self->dv_xname);
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return;
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}
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ipl = DIO_IPL(sc->sc_regs);
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if (da->da_scode == 7 && internalhpib)
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desc = DIO_DEVICE_DESC_IHPIB;
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else if (da->da_id == DIO_DEVICE_ID_NHPIB) {
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type = HPIBB;
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desc = DIO_DEVICE_DESC_NHPIB;
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} else
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desc = "unknown HP-IB!";
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printf(" ipl %d: %s\n", ipl, desc);
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/* Establish the interrupt handler. */
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(void) isrlink(nhpibintr, sc, ipl, ISRPRI_BIO);
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dmacomputeipl();
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ha.ha_ops = &nhpib_controller;
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ha.ha_type = type; /* XXX */
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ha.ha_ba = (type == HPIBA) ? HPIBA_BA :
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(sc->sc_regs->hpib_csa & CSA_BA);
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ha.ha_softcpp = &sc->sc_hpibbus; /* XXX */
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(void)config_found(self, &ha, hpibdevprint);
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}
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void
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nhpibreset(hs)
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struct hpibbus_softc *hs;
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{
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struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
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struct nhpibdevice *hd = sc->sc_regs;
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hd->hpib_acr = AUX_SSWRST;
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hd->hpib_ar = hs->sc_ba;
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hd->hpib_lim = LIS_ERR;
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hd->hpib_mim = 0;
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hd->hpib_acr = AUX_CDAI;
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hd->hpib_acr = AUX_CSHDW;
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hd->hpib_acr = AUX_SSTD1;
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hd->hpib_acr = AUX_SVSTD1;
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hd->hpib_acr = AUX_CPP;
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hd->hpib_acr = AUX_CHDFA;
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hd->hpib_acr = AUX_CHDFE;
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hd->hpib_acr = AUX_RHDF;
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hd->hpib_acr = AUX_CSWRST;
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nhpibifc(hd);
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hd->hpib_ie = IDS_IE;
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hd->hpib_data = C_DCL_P;
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DELAY(100000);
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}
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void
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nhpibifc(hd)
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register struct nhpibdevice *hd;
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{
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hd->hpib_acr = AUX_TCA;
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hd->hpib_acr = AUX_CSRE;
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hd->hpib_acr = AUX_SSIC;
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DELAY(100);
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hd->hpib_acr = AUX_CSIC;
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hd->hpib_acr = AUX_SSRE;
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}
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int
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nhpibsend(hs, slave, sec, ptr, origcnt)
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struct hpibbus_softc *hs;
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int slave, sec, origcnt;
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void *ptr;
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{
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struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
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struct nhpibdevice *hd = sc->sc_regs;
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int cnt = origcnt;
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char *addr = ptr;
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hd->hpib_acr = AUX_TCA;
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hd->hpib_data = C_UNL_P;
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if (nhpibwait(hd, MIS_BO))
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goto senderror;
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hd->hpib_data = talker_par[hs->sc_ba];
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hd->hpib_acr = AUX_STON;
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if (nhpibwait(hd, MIS_BO))
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goto senderror;
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hd->hpib_data = listnr_par[slave];
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if (nhpibwait(hd, MIS_BO))
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goto senderror;
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if (sec >= 0 || sec == -2) {
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if (sec == -2) /* selected device clear KLUDGE */
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hd->hpib_data = C_SDC_P;
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else
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hd->hpib_data = sec_par[sec];
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if (nhpibwait(hd, MIS_BO))
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goto senderror;
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}
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hd->hpib_acr = AUX_GTS;
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if (cnt) {
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while (--cnt > 0) {
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hd->hpib_data = *addr++;
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if (nhpibwait(hd, MIS_BO))
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goto senderror;
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}
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hd->hpib_acr = AUX_EOI;
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hd->hpib_data = *addr;
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if (nhpibwait(hd, MIS_BO))
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goto senderror;
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hd->hpib_acr = AUX_TCA;
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#if 0
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/*
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* May be causing 345 disks to hang due to interference
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* with PPOLL mechanism.
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*/
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hd->hpib_data = C_UNL_P;
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(void) nhpibwait(hd, MIS_BO);
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#endif
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}
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return(origcnt);
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senderror:
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nhpibifc(hd);
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return(origcnt - cnt - 1);
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}
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int
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nhpibrecv(hs, slave, sec, ptr, origcnt)
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struct hpibbus_softc *hs;
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int slave, sec, origcnt;
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void *ptr;
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{
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struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
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struct nhpibdevice *hd = sc->sc_regs;
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int cnt = origcnt;
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char *addr = ptr;
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/*
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* Slave < 0 implies continuation of a previous receive
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* that probably timed out.
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*/
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if (slave >= 0) {
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hd->hpib_acr = AUX_TCA;
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hd->hpib_data = C_UNL_P;
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if (nhpibwait(hd, MIS_BO))
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goto recverror;
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hd->hpib_data = listnr_par[hs->sc_ba];
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hd->hpib_acr = AUX_SLON;
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if (nhpibwait(hd, MIS_BO))
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goto recverror;
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hd->hpib_data = talker_par[slave];
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if (nhpibwait(hd, MIS_BO))
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goto recverror;
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if (sec >= 0) {
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hd->hpib_data = sec_par[sec];
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if (nhpibwait(hd, MIS_BO))
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goto recverror;
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}
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hd->hpib_acr = AUX_RHDF;
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hd->hpib_acr = AUX_GTS;
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}
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if (cnt) {
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while (--cnt >= 0) {
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if (nhpibwait(hd, MIS_BI))
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goto recvbyteserror;
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*addr++ = hd->hpib_data;
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}
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hd->hpib_acr = AUX_TCA;
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hd->hpib_data = (slave == 31) ? C_UNA_P : C_UNT_P;
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(void) nhpibwait(hd, MIS_BO);
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}
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return(origcnt);
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recverror:
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nhpibifc(hd);
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recvbyteserror:
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return(origcnt - cnt - 1);
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}
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void
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nhpibgo(hs, slave, sec, ptr, count, rw, timo)
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struct hpibbus_softc *hs;
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int slave, sec, count, rw, timo;
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void *ptr;
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{
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struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
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struct nhpibdevice *hd = sc->sc_regs;
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char *addr = ptr;
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hs->sc_flags |= HPIBF_IO;
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if (timo)
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hs->sc_flags |= HPIBF_TIMO;
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if (rw == B_READ)
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hs->sc_flags |= HPIBF_READ;
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#ifdef DEBUG
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else if (hs->sc_flags & HPIBF_READ) {
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printf("nhpibgo: HPIBF_READ still set\n");
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hs->sc_flags &= ~HPIBF_READ;
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}
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#endif
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hs->sc_count = count;
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hs->sc_addr = addr;
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if (hs->sc_flags & HPIBF_READ) {
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hs->sc_curcnt = count;
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dmago(hs->sc_dq->dq_chan, addr, count, DMAGO_BYTE|DMAGO_READ);
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nhpibrecv(hs, slave, sec, 0, 0);
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hd->hpib_mim = MIS_END;
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} else {
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hd->hpib_mim = 0;
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if (count < hpibdmathresh) {
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hs->sc_curcnt = count;
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nhpibsend(hs, slave, sec, addr, count);
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nhpibdone(hs);
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return;
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}
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hs->sc_curcnt = --count;
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dmago(hs->sc_dq->dq_chan, addr, count, DMAGO_BYTE);
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nhpibsend(hs, slave, sec, 0, 0);
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}
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hd->hpib_ie = IDS_IE | IDS_DMA(hs->sc_dq->dq_chan);
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}
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/*
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* This timeout can only happen if a DMA read finishes DMAing with the read
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* still pending (more data in read transaction than the driver was prepared
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* to accept). At the moment, variable-record tape drives are the only things
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* capabale of doing this. We repeat the necessary code from nhpibintr() -
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* easier and quicker than calling nhpibintr() for this special case.
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*/
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void
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nhpibreadtimo(arg)
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void *arg;
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{
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struct hpibbus_softc *hs = arg;
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struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
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int s = splbio();
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if (hs->sc_flags & HPIBF_IO) {
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register struct nhpibdevice *hd = sc->sc_regs;
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register struct hpibqueue *hq;
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hd->hpib_mim = 0;
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hd->hpib_acr = AUX_TCA;
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hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO);
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dmafree(hs->sc_dq);
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hq = hs->sc_queue.tqh_first;
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(hq->hq_intr)(hq->hq_softc);
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}
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splx(s);
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}
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void
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nhpibdone(hs)
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struct hpibbus_softc *hs;
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{
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struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
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struct nhpibdevice *hd = sc->sc_regs;
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int cnt;
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cnt = hs->sc_curcnt;
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hs->sc_addr += cnt;
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hs->sc_count -= cnt;
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hs->sc_flags |= HPIBF_DONE;
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hd->hpib_ie = IDS_IE;
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if (hs->sc_flags & HPIBF_READ) {
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if ((hs->sc_flags & HPIBF_TIMO) &&
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(hd->hpib_ids & IDS_IR) == 0)
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timeout(nhpibreadtimo, hs, hz >> 2);
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} else {
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if (hs->sc_count == 1) {
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(void) nhpibwait(hd, MIS_BO);
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hd->hpib_acr = AUX_EOI;
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hd->hpib_data = *hs->sc_addr;
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hd->hpib_mim = MIS_BO;
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}
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#ifdef DEBUG
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else if (hs->sc_count)
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panic("nhpibdone");
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#endif
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}
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}
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int
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nhpibintr(arg)
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void *arg;
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{
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struct nhpib_softc *sc = arg;
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struct hpibbus_softc *hs = sc->sc_hpibbus;
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struct nhpibdevice *hd = sc->sc_regs;
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struct hpibqueue *hq;
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int stat0;
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int stat1;
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#ifdef lint
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if (stat1 = unit) return(1);
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#endif
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if ((hd->hpib_ids & IDS_IR) == 0)
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return(0);
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stat0 = hd->hpib_mis;
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stat1 = hd->hpib_lis;
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hq = hs->sc_queue.tqh_first;
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if (hs->sc_flags & HPIBF_IO) {
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hd->hpib_mim = 0;
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if ((hs->sc_flags & HPIBF_DONE) == 0) {
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hs->sc_flags &= ~HPIBF_TIMO;
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dmastop(hs->sc_dq->dq_chan);
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} else if (hs->sc_flags & HPIBF_TIMO)
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untimeout(nhpibreadtimo, hs);
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hd->hpib_acr = AUX_TCA;
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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
|
|
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;
|
|
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;
|
|
{
|
|
struct hpibbus_softc *hs = arg;
|
|
struct nhpib_softc *sc = (struct nhpib_softc *)hs->sc_dev.dv_parent;
|
|
extern int cold;
|
|
|
|
if ((hs->sc_flags & HPIBF_PPOLL) == 0)
|
|
return;
|
|
again:
|
|
if (nhpibppoll(hs) & (0x80 >> hs->sc_queue.tqh_first->hq_slave))
|
|
sc->sc_regs->hpib_mim = MIS_BO;
|
|
else if (cold)
|
|
/* timeouts not working yet */
|
|
goto again;
|
|
else
|
|
timeout(nhpibppwatch, hs, 1);
|
|
}
|