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Annotation of Net2/arch/hp300/stand/fhpib.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:  *     @(#)fhpib.c     7.2 (Berkeley) 12/16/90
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * 98625A/B HPIB driver
        !            38:  */
        !            39: 
        !            40: #include "sys/param.h"
        !            41: #include "../dev/fhpibreg.h"
        !            42: #include "hpibvar.h"
        !            43: 
        !            44: fhpibinit(unit)
        !            45:        register int unit;
        !            46: {
        !            47:        register struct hpib_softc *hs = &hpib_softc[unit];
        !            48:        register struct fhpibdevice *hd = (struct fhpibdevice *)hs->sc_addr;
        !            49: 
        !            50:        if (hd->hpib_cid != HPIBC)
        !            51:                return(0);
        !            52:        hs->sc_type = HPIBC;
        !            53:        hs->sc_ba = HPIBC_BA;
        !            54:        fhpibreset(unit);
        !            55:        return(1);
        !            56: }
        !            57: 
        !            58: fhpibreset(unit)
        !            59: {
        !            60:        register struct hpib_softc *hs = &hpib_softc[unit];
        !            61:        register struct fhpibdevice *hd;
        !            62: 
        !            63:        hd = (struct fhpibdevice *)hs->sc_addr;
        !            64:        hd->hpib_cid = 0xFF;
        !            65:        DELAY(100);
        !            66:        hd->hpib_cmd = CT_8BIT;
        !            67:        hd->hpib_ar = AR_ARONC;
        !            68:        hd->hpib_cmd |= CT_IFC;
        !            69:        hd->hpib_cmd |= CT_INITFIFO;
        !            70:        DELAY(100);
        !            71:        hd->hpib_cmd &= ~CT_IFC;
        !            72:        hd->hpib_cmd |= CT_REN;
        !            73:        hd->hpib_stat = ST_ATN;
        !            74:        hd->hpib_data = C_DCL;
        !            75:        DELAY(100000);
        !            76: }
        !            77: 
        !            78: fhpibsend(unit, slave, sec, buf, cnt)
        !            79:        register char *buf;
        !            80:        register int cnt;
        !            81: {
        !            82:        register struct hpib_softc *hs = &hpib_softc[unit];
        !            83:        register struct fhpibdevice *hd;
        !            84:        int origcnt = cnt;
        !            85: 
        !            86:        hd = (struct fhpibdevice *)hs->sc_addr;
        !            87:        hd->hpib_stat = 0;
        !            88:        hd->hpib_imask = IM_IDLE | IM_ROOM;
        !            89:        fhpibwait(hd, IM_IDLE);
        !            90:        hd->hpib_stat = ST_ATN;
        !            91:        hd->hpib_data = C_UNL;
        !            92:        hd->hpib_data = C_TAG + hs->sc_ba;
        !            93:        hd->hpib_data = C_LAG + slave;
        !            94:        if (sec != -1)
        !            95:                hd->hpib_data = C_SCG + sec;
        !            96:        fhpibwait(hd, IM_IDLE);
        !            97:        hd->hpib_stat = ST_WRITE;
        !            98:        if (cnt) {
        !            99:                while (--cnt) {
        !           100:                        hd->hpib_data = *buf++;
        !           101:                        if (fhpibwait(hd, IM_ROOM) < 0)
        !           102:                                break;
        !           103:                }
        !           104:                hd->hpib_stat = ST_EOI;
        !           105:                hd->hpib_data = *buf;
        !           106:                if (fhpibwait(hd, IM_ROOM) < 0)
        !           107:                        cnt++;
        !           108:                hd->hpib_stat = ST_ATN;
        !           109:                /* XXX: HP-UX claims bug with CS80 transparent messages */
        !           110:                if (sec == 0x12)
        !           111:                        DELAY(150);
        !           112:                hd->hpib_data = C_UNL;
        !           113:                fhpibwait(hd, IM_IDLE);
        !           114:        }
        !           115:        hd->hpib_imask = 0;
        !           116:        return(origcnt - cnt);
        !           117: }
        !           118: 
        !           119: fhpibrecv(unit, slave, sec, buf, cnt)
        !           120:        register char *buf;
        !           121:        register int cnt;
        !           122: {
        !           123:        register struct hpib_softc *hs = &hpib_softc[unit];
        !           124:        register struct fhpibdevice *hd;
        !           125:        int origcnt = cnt;
        !           126: 
        !           127:        hd = (struct fhpibdevice *)hs->sc_addr;
        !           128:        hd->hpib_stat = 0;
        !           129:        hd->hpib_imask = IM_IDLE | IM_ROOM | IM_BYTE;
        !           130:        fhpibwait(hd, IM_IDLE);
        !           131:        hd->hpib_stat = ST_ATN;
        !           132:        hd->hpib_data = C_UNL;
        !           133:        hd->hpib_data = C_LAG + hs->sc_ba;
        !           134:        hd->hpib_data = C_TAG + slave;
        !           135:        if (sec != -1)
        !           136:                hd->hpib_data = C_SCG + sec;
        !           137:        fhpibwait(hd, IM_IDLE);
        !           138:        hd->hpib_stat = ST_READ0;
        !           139:        hd->hpib_data = 0;
        !           140:        if (cnt) {
        !           141:                while (--cnt >= 0) {
        !           142:                        if (fhpibwait(hd, IM_BYTE) < 0)
        !           143:                                break;
        !           144:                        *buf++ = hd->hpib_data;
        !           145:                }
        !           146:                cnt++;
        !           147:                fhpibwait(hd, IM_ROOM);
        !           148:                hd->hpib_stat = ST_ATN;
        !           149:                hd->hpib_data = (slave == 31) ? C_UNA : C_UNT;
        !           150:                fhpibwait(hd, IM_IDLE);
        !           151:        }
        !           152:        hd->hpib_imask = 0;
        !           153:        return(origcnt - cnt);
        !           154: }
        !           155: 
        !           156: fhpibppoll(unit)
        !           157:        register int unit;
        !           158: {
        !           159:        register struct hpib_softc *hs = &hpib_softc[unit];
        !           160:        register struct fhpibdevice *hd;
        !           161:        register int ppoll;
        !           162: 
        !           163:        hd = (struct fhpibdevice *)hs->sc_addr;
        !           164:        hd->hpib_stat = 0;
        !           165:        hd->hpib_psense = 0;
        !           166:        hd->hpib_pmask = 0xFF;
        !           167:        hd->hpib_imask = IM_PPRESP | IM_PABORT;
        !           168:        DELAY(25);
        !           169:        hd->hpib_intr = IM_PABORT;
        !           170:        ppoll = hd->hpib_data;
        !           171:        if (hd->hpib_intr & IM_PABORT)
        !           172:                ppoll = 0;
        !           173:        hd->hpib_imask = 0;
        !           174:        hd->hpib_pmask = 0;
        !           175:        hd->hpib_stat = ST_IENAB;
        !           176:        return(ppoll);
        !           177: }
        !           178: 
        !           179: fhpibwait(hd, x)
        !           180:        register struct fhpibdevice *hd;
        !           181: {
        !           182:        register int timo = 100000;
        !           183: 
        !           184:        while ((hd->hpib_intr & x) == 0 && --timo)
        !           185:                ;
        !           186:        if (timo == 0)
        !           187:                return(-1);
        !           188:        return(0);
        !           189: }

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