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      1 /*	$NetBSD: hpib.c,v 1.9 2007/03/04 05:59:50 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1990, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)hpib.c	8.1 (Berkeley) 6/10/93
     32  */
     33 
     34 /*
     35  * HPIB driver
     36  */
     37 #include <sys/param.h>
     38 #include <sys/reboot.h>
     39 
     40 #include <lib/libsa/stand.h>
     41 
     42 #include <hp300/stand/common/device.h>
     43 #include <hp300/stand/common/hpibvar.h>
     44 #include <hp300/stand/common/samachdep.h>
     45 
     46 #include <hp300/dev/dioreg.h>
     47 
     48 int	internalhpib = IIOV(DIO_IHPIBADDR);
     49 
     50 struct	hpib_softc hpib_softc[NHPIB];
     51 
     52 void
     53 hpibinit(void)
     54 {
     55 	struct hp_hw *hw;
     56 	struct hpib_softc *hs;
     57 	int i;
     58 
     59 	i = 0;
     60 	for (hw = sc_table; i < NHPIB && hw < &sc_table[MAXCTLRS]; hw++) {
     61 		if (!HW_ISHPIB(hw))
     62 			continue;
     63 		hs = &hpib_softc[i];
     64 		hs->sc_addr = hw->hw_kva;
     65 		if (nhpibinit(i) == 0)
     66 			if (fhpibinit(i) == 0)
     67 				continue;
     68 		if (howto & RB_ASKNAME)
     69 			printf("hpib%d at sc%d\n", i, hw->hw_sc);
     70 		hw->hw_pa = (void *) i;	/* XXX for autoconfig */
     71 		hs->sc_alive = 1;
     72 		i++;
     73 	}
     74 }
     75 
     76 int
     77 hpibalive(int unit)
     78 {
     79 	if (unit >= NHPIB || hpib_softc[unit].sc_alive == 0)
     80 		return 0;
     81 	return 1;
     82 }
     83 
     84 int
     85 hpibid(int unit, int slave)
     86 {
     87 	short id;
     88 	int rv;
     89 
     90 	if (hpib_softc[unit].sc_type == HPIBC)
     91 		rv = fhpibrecv(unit, 31, slave, (uint8_t *)&id, 2);
     92 	else
     93 		rv = nhpibrecv(unit, 31, slave, (uint8_t *)&id, 2);
     94 	if (rv != 2)
     95 		return 0;
     96 	return id;
     97 }
     98 
     99 int
    100 hpibsend(int unit, int slave, int sec, uint8_t *buf, int cnt)
    101 {
    102 
    103 	if (hpib_softc[unit].sc_type == HPIBC)
    104 		return (fhpibsend(unit, slave, sec, buf, cnt));
    105 	return nhpibsend(unit, slave, sec, buf, cnt);
    106 }
    107 
    108 int
    109 hpibrecv(int unit, int slave, int sec, uint8_t *buf, int cnt)
    110 {
    111 
    112 	if (hpib_softc[unit].sc_type == HPIBC)
    113 		return (fhpibrecv(unit, slave, sec, buf, cnt));
    114 	return nhpibrecv(unit, slave, sec, buf, cnt);
    115 }
    116 
    117 int
    118 hpibswait(int unit, int slave)
    119 {
    120 	int timo = 1000000;
    121 	int (*poll)(int);
    122 
    123 	slave = 0x80 >> slave;
    124 	if (hpib_softc[unit].sc_type == HPIBC)
    125 		poll = fhpibppoll;
    126 	else
    127 		poll = nhpibppoll;
    128 	while (((*poll)(unit) & slave) == 0)
    129 		if (--timo == 0)
    130 			break;
    131 	if (timo == 0)
    132 		return -1;
    133 	return 0;
    134 }
    135 
    136 void
    137 hpibgo(int unit, int slave, int sec, uint8_t *addr, int count, int flag)
    138 {
    139 
    140 	if (hpib_softc[unit].sc_type == HPIBC)
    141 		if (flag == F_READ)
    142 			fhpibrecv(unit, slave, sec, addr, count);
    143 		else
    144 			fhpibsend(unit, slave, sec, addr, count);
    145 	else
    146 		if (flag == F_READ)
    147 			nhpibrecv(unit, slave, sec, addr, count);
    148 		else
    149 			nhpibsend(unit, slave, sec, addr, count);
    150 }
    151