usr/src/sys/hp300/stand/hpib.c

/*
 * Copyright (c) 1982, 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)hpib.c      7.6 (Berkeley) %G%
 */

/*
 * HPIB driver
 */
#include "sys/param.h"
#include "sys/reboot.h"
#include "hp/dev/device.h"
#include "hpibvar.h"

#include "saio.h"
#include "samachdep.h"

int     internalhpib = IIOV(0x478000);
int     fhpibppoll(), nhpibppoll();

struct  hpib_softc hpib_softc[NHPIB];

hpibinit()
{
        extern struct hp_hw sc_table[];
        register struct hp_hw *hw;
        register struct hpib_softc *hs;
        register int i, addr;

        i = 0;
        for (hw = sc_table; i < NHPIB && hw < &sc_table[MAXCTLRS]; hw++) {
                if (!HW_ISHPIB(hw))
                        continue;
                hs = &hpib_softc[i];
                hs->sc_addr = hw->hw_kva;
                if (nhpibinit(i) == 0)
                        if (fhpibinit(i) == 0)
                                continue;
                if (howto & RB_ASKNAME)
                        printf("hpib%d at sc%d\n", i, hw->hw_sc);
                hw->hw_pa = (caddr_t) i;        /* XXX for autoconfig */
                hs->sc_alive = 1;
                i++;
        }
}

hpibalive(unit)
        register int unit;
{
        if (unit >= NHPIB || hpib_softc[unit].sc_alive == 0)
                return (0);
        return (1);
}

hpibid(unit, slave)
        int unit, slave;
{
        short id;
        int rv;

        if (hpib_softc[unit].sc_type == HPIBC)
                rv = fhpibrecv(unit, 31, slave, &id, 2);
        else
                rv = nhpibrecv(unit, 31, slave, &id, 2);
        if (rv != 2)
                return (0);
        return (id);
}

hpibsend(unit, slave, sec, buf, cnt)
        int unit, slave;
        char *buf;
        int cnt;
{
        if (hpib_softc[unit].sc_type == HPIBC)
                return (fhpibsend(unit, slave, sec, buf, cnt));
        return (nhpibsend(unit, slave, sec, buf, cnt));
}

hpibrecv(unit, slave, sec, buf, cnt)
        int unit, slave;
        char *buf;
        int cnt;
{
        if (hpib_softc[unit].sc_type == HPIBC)
                return (fhpibrecv(unit, slave, sec, buf, cnt));
        return (nhpibrecv(unit, slave, sec, buf, cnt));
}

hpibswait(unit, slave)
        register int unit, slave;
{
        register int timo = 1000000;
        register int (*poll)();

        slave = 0x80 >> slave;
        if (hpib_softc[unit].sc_type == HPIBC)
                poll = fhpibppoll;
        else
                poll = nhpibppoll;
        while (((*poll)(unit) & slave) == 0)
                if (--timo == 0)
                        break;
        if (timo == 0)
                return (-1);
        return (0);
}

hpibgo(unit, slave, sec, addr, count, flag)
        int unit, slave;
        char *addr;
{
        if (hpib_softc[unit].sc_type == HPIBC)
                if (flag == F_READ)
                        fhpibrecv(unit, slave, sec, addr, count);
                else
                        fhpibsend(unit, slave, sec, addr, count);
        else
                if (flag == F_READ)
                        nhpibrecv(unit, slave, sec, addr, count);
                else
                        nhpibsend(unit, slave, sec, addr, count);
}