/*      $NetBSD: hpib.c,v 1.9 2007/03/04 05:59:50 christos Exp $        */

/*
* Copyright (c) 1982, 1990, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*      @(#)hpib.c      8.1 (Berkeley) 6/10/93
*/

/*
* HPIB driver
*/
#include <sys/param.h>
#include <sys/reboot.h>

#include <lib/libsa/stand.h>

#include <hp300/stand/common/device.h>
#include <hp300/stand/common/hpibvar.h>
#include <hp300/stand/common/samachdep.h>

#include <hp300/dev/dioreg.h>

int     internalhpib = IIOV(DIO_IHPIBADDR);

struct  hpib_softc hpib_softc[NHPIB];

void
hpibinit(void)
{
       struct hp_hw *hw;
       struct hpib_softc *hs;
       int i;

       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 = (void *) i; /* XXX for autoconfig */
               hs->sc_alive = 1;
               i++;
       }
}

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

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

       if (hpib_softc[unit].sc_type == HPIBC)
               rv = fhpibrecv(unit, 31, slave, (uint8_t *)&id, 2);
       else
               rv = nhpibrecv(unit, 31, slave, (uint8_t *)&id, 2);
       if (rv != 2)
               return 0;
       return id;
}

int
hpibsend(int unit, int slave, int sec, uint8_t *buf, int cnt)
{

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

int
hpibrecv(int unit, int slave, int sec, uint8_t *buf, int cnt)
{

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

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

       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;
}

void
hpibgo(int unit, int slave, int sec, uint8_t *addr, int count, int flag)
{

       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);
}