450 lines
11 KiB
C
450 lines
11 KiB
C
/* $NetBSD: nhpib.c,v 1.6 1995/01/07 10:30:14 mycroft Exp $ */
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/*
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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 "hpib.h"
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#if NHPIB > 0
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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 <hp300/dev/device.h>
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#include <hp300/dev/nhpibreg.h>
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#include <hp300/dev/hpibvar.h>
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#include <hp300/dev/dmavar.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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nhpibtype(hc)
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register struct hp_ctlr *hc;
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{
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register struct hpib_softc *hs = &hpib_softc[hc->hp_unit];
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register struct nhpibdevice *hd = (struct nhpibdevice *)hc->hp_addr;
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if (hc->hp_addr == internalhpib) {
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hs->sc_type = HPIBA;
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hs->sc_ba = HPIBA_BA;
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hc->hp_ipl = HPIBA_IPL;
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}
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else if (hd->hpib_cid == HPIBB) {
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hs->sc_type = HPIBB;
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hs->sc_ba = hd->hpib_csa & CSA_BA;
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hc->hp_ipl = HPIB_IPL(hd->hpib_ids);
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}
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else
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return(0);
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return(1);
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}
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nhpibreset(unit)
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int unit;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
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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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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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nhpibsend(unit, slave, sec, addr, origcnt)
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int unit, slave, sec, origcnt;
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register char *addr;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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register int cnt = origcnt;
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hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
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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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nhpibrecv(unit, slave, sec, addr, origcnt)
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int unit, slave, sec, origcnt;
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register char *addr;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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register int cnt = origcnt;
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hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
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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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nhpibgo(unit, slave, sec, addr, count, rw, timo)
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register int unit, slave;
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int sec, count, rw;
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char *addr;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
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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_ctlr, addr, count, DMAGO_BYTE|DMAGO_READ);
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nhpibrecv(unit, 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(unit, slave, sec, addr, count);
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nhpibdone(unit);
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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_ctlr, addr, count, DMAGO_BYTE);
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nhpibsend(unit, slave, sec, 0, 0);
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}
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hd->hpib_ie = IDS_IE | IDS_DMA(hs->sc_dq.dq_ctlr);
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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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int unit;
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register struct hpib_softc *hs;
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int s = splbio();
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unit = (int)arg;
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hs = &hpib_softc[unit];
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if (hs->sc_flags & HPIBF_IO) {
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register struct nhpibdevice *hd;
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register struct devqueue *dq;
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hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
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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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dq = hs->sc_sq.dq_forw;
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(dq->dq_driver->d_intr)(dq->dq_unit);
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}
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(void) splx(s);
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}
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nhpibdone(unit)
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register int unit;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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register int cnt;
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hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
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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, (void *)unit, 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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nhpibintr(unit)
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register int unit;
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{
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register struct hpib_softc *hs = &hpib_softc[unit];
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register struct nhpibdevice *hd;
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register struct devqueue *dq;
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register 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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hd = (struct nhpibdevice *)hs->sc_hc->hp_addr;
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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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dq = hs->sc_sq.dq_forw;
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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_ctlr);
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} else if (hs->sc_flags & HPIBF_TIMO)
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untimeout(nhpibreadtimo, (void *)unit);
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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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(dq->dq_driver->d_intr)(dq->dq_unit);
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} else if (hs->sc_flags & HPIBF_PPOLL) {
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hd->hpib_mim = 0;
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stat0 = nhpibppoll(unit);
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if (stat0 & (0x80 >> dq->dq_slave)) {
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hs->sc_flags &= ~HPIBF_PPOLL;
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(dq->dq_driver->d_intr)(dq->dq_unit);
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}
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#ifdef DEBUG
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else
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printf("hpib%d: PPOLL intr bad status %x\n",
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unit, stat0);
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#endif
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}
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return(1);
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}
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nhpibppoll(unit)
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int unit;
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{
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register struct nhpibdevice *hd;
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register int ppoll;
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hd = (struct nhpibdevice *)hpib_softc[unit].sc_hc->hp_addr;
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hd->hpib_acr = AUX_SPP;
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DELAY(25);
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ppoll = hd->hpib_cpt;
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hd->hpib_acr = AUX_CPP;
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return(ppoll);
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}
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#ifdef DEBUG
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int nhpibreporttimo = 0;
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#endif
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nhpibwait(hd, x)
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register struct nhpibdevice *hd;
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int x;
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{
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register int timo = hpibtimeout;
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while ((hd->hpib_mis & x) == 0 && --timo)
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DELAY(1);
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if (timo == 0) {
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#ifdef DEBUG
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if (nhpibreporttimo)
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printf("hpib0: %s timo\n", x==MIS_BO?"OUT":"IN");
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#endif
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return(-1);
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}
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return(0);
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}
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void
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nhpibppwatch(arg)
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void *arg;
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{
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register struct hpib_softc *hs;
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register int unit;
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extern int cold;
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unit = (int)arg;
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hs = &hpib_softc[unit];
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if ((hs->sc_flags & HPIBF_PPOLL) == 0)
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return;
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again:
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if (nhpibppoll(unit) & (0x80 >> hs->sc_sq.dq_forw->dq_slave))
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((struct nhpibdevice *)hs->sc_hc->hp_addr)->hpib_mim = MIS_BO;
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else if (cold)
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/* timeouts not working yet */
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goto again;
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else
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timeout(nhpibppwatch, (void *)unit, 1);
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}
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#endif
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