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Annotation of 43BSDReno/sys/hpstand/hpib.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 is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)hpib.c      7.2 (Berkeley) 6/24/90
        !            21:  */
        !            22: 
        !            23: /*
        !            24:  * HPIB driver
        !            25:  */
        !            26: #include "reboot.h"
        !            27: #include "../hpdev/device.h"
        !            28: #include "hpibvar.h"
        !            29: 
        !            30: #include "saio.h"
        !            31: #include "samachdep.h"
        !            32: 
        !            33: int    internalhpib = 0x478000;
        !            34: int    fhpibppoll(), nhpibppoll();
        !            35: 
        !            36: struct hpib_softc hpib_softc[NHPIB];
        !            37: 
        !            38: #define        hpibunit(x)     ((x) >> 3)
        !            39: #define        hpibslave(x)    ((x) & 7)
        !            40: 
        !            41: hpibinit()
        !            42: {
        !            43:        extern struct hp_hw sc_table[];
        !            44:        register struct hp_hw *hw;
        !            45:        register struct hpib_softc *hs;
        !            46:        register int i, addr;
        !            47:        static int first = 1;
        !            48:        
        !            49:        i = 0;
        !            50:        for (hw = sc_table; i < NHPIB && hw < &sc_table[MAX_CTLR]; hw++) {
        !            51:                if (hw->hw_type != HPIB)
        !            52:                        continue;
        !            53:                hs = &hpib_softc[i];
        !            54:                hs->sc_addr = hw->hw_addr;
        !            55:                if (nhpibinit(i) == 0)
        !            56:                        if (fhpibinit(i) == 0)
        !            57:                                continue;
        !            58:                if (howto & RB_ASKNAME)
        !            59:                        printf("hpib%d at sc%d\n", i, hw->hw_sc);
        !            60:                /*
        !            61:                 * Adjust devtype on first call.  This routine assumes that
        !            62:                 * adaptor is in the high byte of devtype.
        !            63:                 */
        !            64:                if (first && ((devtype >> 24) & 0xff) == hw->hw_sc) {
        !            65:                        devtype = (devtype & 0x00ffffff) | (i << 24);
        !            66:                        first = 0;
        !            67:                }
        !            68:                hs->sc_alive = 1;
        !            69:                i++;
        !            70:        }
        !            71: }
        !            72: 
        !            73: hpibalive(unit)
        !            74:        register int unit;
        !            75: {
        !            76:        unit = hpibunit(unit);
        !            77:        if (unit >= NHPIB || hpib_softc[unit].sc_alive == 0)
        !            78:                return (0);
        !            79:        return (1);
        !            80: }
        !            81: 
        !            82: hpibid(unit)
        !            83:        register int unit;
        !            84: {
        !            85:        register struct hpib_softc *hs = &hpib_softc[hpibunit(unit)];
        !            86:        register int slave;
        !            87:        short id;
        !            88: 
        !            89:        slave = hpibslave(unit);
        !            90:        unit = hpibunit(unit);
        !            91:        if (hs->sc_type == HPIBC)
        !            92:                slave = fhpibrecv(unit, 31, slave, &id, 2);
        !            93:        else
        !            94:                slave = nhpibrecv(unit, 31, slave, &id, 2);
        !            95:        if (slave != 2)
        !            96:                return (0);
        !            97:        return (id);
        !            98: }
        !            99: 
        !           100: hpibsend(unit, sec, buf, cnt)
        !           101:        register char *buf;
        !           102:        register int cnt;
        !           103: {
        !           104:        register struct hpib_softc *hs = &hpib_softc[hpibunit(unit)];
        !           105:        register int slave;
        !           106: 
        !           107:        slave = hpibslave(unit);
        !           108:        unit = hpibunit(unit);
        !           109:        if (hs->sc_type == HPIBC)
        !           110:                return (fhpibsend(unit, slave, sec, buf, cnt));
        !           111:        else
        !           112:                return (nhpibsend(unit, slave, sec, buf, cnt));
        !           113: }
        !           114: 
        !           115: hpibrecv(unit, sec, buf, cnt)
        !           116:        register char *buf;
        !           117:        register int cnt;
        !           118: {
        !           119:        register struct hpib_softc *hs = &hpib_softc[hpibunit(unit)];
        !           120:        register int slave;
        !           121: 
        !           122:        slave = hpibslave(unit);
        !           123:        unit = hpibunit(unit);
        !           124:        if (hs->sc_type == HPIBC)
        !           125:                return (fhpibrecv(unit, slave, sec, buf, cnt));
        !           126:        else
        !           127:                return (nhpibrecv(unit, slave, sec, buf, cnt));
        !           128: }
        !           129: 
        !           130: hpibswait(unit)
        !           131:        register int unit;
        !           132: {
        !           133:        register int timo = 1000000;
        !           134:        register int slave = 0x80 >> hpibslave(unit);
        !           135:        register int (*poll)();
        !           136: 
        !           137:        unit = hpibunit(unit);
        !           138:        if (hpib_softc[unit].sc_type == HPIBC)
        !           139:                poll = fhpibppoll;
        !           140:        else
        !           141:                poll = nhpibppoll;
        !           142:        while (((*poll)(unit) & slave) == 0)
        !           143:                if (--timo == 0)
        !           144:                        break;
        !           145:        if (timo == 0)
        !           146:                return (-1);
        !           147:        return (0);
        !           148: }
        !           149: 
        !           150: hpibgo(unit, sec, addr, count, flag)
        !           151:        register int unit;
        !           152:        char *addr;
        !           153: {
        !           154:        register int slave;
        !           155: 
        !           156:        slave = hpibslave(unit);
        !           157:        unit = hpibunit(unit);
        !           158:        if (hpib_softc[unit].sc_type == HPIBC)
        !           159:                if (flag == READ)
        !           160:                        fhpibrecv(unit, slave, sec, addr, count);
        !           161:                else
        !           162:                        fhpibsend(unit, slave, sec, addr, count);
        !           163:        else
        !           164:                if (flag == READ)
        !           165:                        nhpibrecv(unit, slave, sec, addr, count);
        !           166:                else
        !           167:                        nhpibsend(unit, slave, sec, addr, count);
        !           168: }

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