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Annotation of Net2/arch/hp300/stand/nhpib.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1990 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)nhpib.c     7.2 (Berkeley) 12/16/90
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * Internal/98624 HPIB driver
        !            38:  */
        !            39: 
        !            40: #include "sys/param.h"
        !            41: #include "../dev/nhpibreg.h"
        !            42: #include "hpibvar.h"
        !            43: 
        !            44: nhpibinit(unit)
        !            45: {
        !            46:        register struct hpib_softc *hs = &hpib_softc[unit];
        !            47:        register struct nhpibdevice *hd = (struct nhpibdevice *)hs->sc_addr;
        !            48:        extern int internalhpib;
        !            49: 
        !            50:        if ((int)hd == internalhpib) {
        !            51:                hs->sc_type = HPIBA;
        !            52:                hs->sc_ba = HPIBA_BA;
        !            53:        }
        !            54:        else if (hd->hpib_cid == HPIBB) {
        !            55:                hs->sc_type = HPIBB;
        !            56:                hs->sc_ba = hd->hpib_csa & CSA_BA;
        !            57:        }
        !            58:        else
        !            59:                return(0);
        !            60:        nhpibreset(unit);
        !            61:        return(1);
        !            62: }
        !            63: 
        !            64: nhpibreset(unit)
        !            65: {
        !            66:        register struct hpib_softc *hs = &hpib_softc[unit];
        !            67:        register struct nhpibdevice *hd;
        !            68: 
        !            69:        hd = (struct nhpibdevice *)hs->sc_addr;
        !            70:        hd->hpib_acr = AUX_SSWRST;
        !            71:        hd->hpib_ar = hs->sc_ba;
        !            72:        hd->hpib_lim = 0;
        !            73:        hd->hpib_mim = 0;
        !            74:        hd->hpib_acr = AUX_CDAI;
        !            75:        hd->hpib_acr = AUX_CSHDW;
        !            76:        hd->hpib_acr = AUX_SSTD1;
        !            77:        hd->hpib_acr = AUX_SVSTD1;
        !            78:        hd->hpib_acr = AUX_CPP;
        !            79:        hd->hpib_acr = AUX_CHDFA;
        !            80:        hd->hpib_acr = AUX_CHDFE;
        !            81:        hd->hpib_acr = AUX_RHDF;
        !            82:        hd->hpib_acr = AUX_CSWRST;
        !            83:        hd->hpib_acr = AUX_TCA;
        !            84:        hd->hpib_acr = AUX_CSRE;
        !            85:        hd->hpib_acr = AUX_SSIC;
        !            86:        DELAY(100);
        !            87:        hd->hpib_acr = AUX_CSIC;
        !            88:        hd->hpib_acr = AUX_SSRE;
        !            89:        hd->hpib_data = C_DCL;
        !            90:        DELAY(100000);
        !            91: }
        !            92: 
        !            93: nhpibsend(unit, slave, sec, buf, cnt)
        !            94:        register char *buf;
        !            95:        register int cnt;
        !            96: {
        !            97:        register struct hpib_softc *hs = &hpib_softc[unit];
        !            98:        register struct nhpibdevice *hd;
        !            99:        register int origcnt = cnt;
        !           100: 
        !           101:        hd = (struct nhpibdevice *)hs->sc_addr;
        !           102:        hd->hpib_acr = AUX_TCA;
        !           103:        hd->hpib_data = C_UNL;
        !           104:        nhpibowait(hd);
        !           105:        hd->hpib_data = C_TAG + hs->sc_ba;
        !           106:        hd->hpib_acr = AUX_STON;
        !           107:        nhpibowait(hd);
        !           108:        hd->hpib_data = C_LAG + slave;
        !           109:        nhpibowait(hd);
        !           110:        if (sec != -1) {
        !           111:                hd->hpib_data = C_SCG + sec;
        !           112:                nhpibowait(hd);
        !           113:        }
        !           114:        hd->hpib_acr = AUX_GTS;
        !           115:        if (cnt) {
        !           116:                while (--cnt) {
        !           117:                        hd->hpib_data = *buf++;
        !           118:                        if (nhpibowait(hd) < 0)
        !           119:                                break;
        !           120:                }
        !           121:                hd->hpib_acr = AUX_EOI;
        !           122:                hd->hpib_data = *buf;
        !           123:                if (nhpibowait(hd) < 0)
        !           124:                        cnt++;
        !           125:                hd->hpib_acr = AUX_TCA;
        !           126:        }
        !           127:        return(origcnt - cnt);
        !           128: }
        !           129: 
        !           130: nhpibrecv(unit, slave, sec, buf, cnt)
        !           131:        register char *buf;
        !           132:        register int cnt;
        !           133: {
        !           134:        register struct hpib_softc *hs = &hpib_softc[unit];
        !           135:        register struct nhpibdevice *hd;
        !           136:        register int origcnt = cnt;
        !           137: 
        !           138:        hd = (struct nhpibdevice *)hs->sc_addr;
        !           139:        hd->hpib_acr = AUX_TCA;
        !           140:        hd->hpib_data = C_UNL;
        !           141:        nhpibowait(hd);
        !           142:        hd->hpib_data = C_LAG + hs->sc_ba;
        !           143:        hd->hpib_acr = AUX_SLON;
        !           144:        nhpibowait(hd);
        !           145:        hd->hpib_data = C_TAG + slave;
        !           146:        nhpibowait(hd);
        !           147:        if (sec != -1) {
        !           148:                hd->hpib_data = C_SCG + sec;
        !           149:                nhpibowait(hd);
        !           150:        }
        !           151:        hd->hpib_acr = AUX_RHDF;
        !           152:        hd->hpib_acr = AUX_GTS;
        !           153:        if (cnt) {
        !           154:                while (--cnt >= 0) {
        !           155:                        if (nhpibiwait(hd) < 0)
        !           156:                                break;
        !           157:                        *buf++ = hd->hpib_data;
        !           158:                }
        !           159:                cnt++;
        !           160:                hd->hpib_acr = AUX_TCA;
        !           161:        }
        !           162:        return(origcnt - cnt);
        !           163: }
        !           164: 
        !           165: nhpibppoll(unit)
        !           166:        register int unit;
        !           167: {
        !           168:        register struct hpib_softc *hs = &hpib_softc[unit];
        !           169:        register struct nhpibdevice *hd;
        !           170:        register int ppoll;
        !           171: 
        !           172:        hd = (struct nhpibdevice *)hs->sc_addr;
        !           173:        hd->hpib_acr = AUX_SPP;
        !           174:        DELAY(25);
        !           175:        ppoll = hd->hpib_cpt;
        !           176:        hd->hpib_acr = AUX_CPP;
        !           177:        return(ppoll);
        !           178: }
        !           179: 
        !           180: nhpibowait(hd)
        !           181:        register struct nhpibdevice *hd;
        !           182: {
        !           183:        register int timo = 100000;
        !           184: 
        !           185:        while ((hd->hpib_mis & MIS_BO) == 0 && --timo)
        !           186:                ;
        !           187:        if (timo == 0)
        !           188:                return(-1);
        !           189:        return(0);
        !           190: }
        !           191: 
        !           192: nhpibiwait(hd)
        !           193:        register struct nhpibdevice *hd;
        !           194: {
        !           195:        register int timo = 100000;
        !           196: 
        !           197:        while ((hd->hpib_mis & MIS_BI) == 0 && --timo)
        !           198:                ;
        !           199:        if (timo == 0)
        !           200:                return(-1);
        !           201:        return(0);
        !           202: }

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