sys/arch/hp300/stand/common/fhpib.c

   1 /*      $NetBSD: fhpib.c,v 1.5 2005/12/11 12:17:19 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  *      @(#)fhpib.c     8.1 (Berkeley) 6/10/93
  32  */
  33
  34 /*
  35  * 98625A/B HPIB driver
  36  */
  37
  38 #include <sys/param.h>
  39
  40 #include <hp300/dev/fhpibreg.h>
  41
  42 #include <hp300/stand/common/hpibvar.h>
  43 #include <hp300/stand/common/samachdep.h>
  44
  45 static int fhpibwait(struct fhpibdevice *, uint8_t);
  46
  47 int
  48 fhpibinit(int unit)
  49 {
  50         struct hpib_softc *hs = &hpib_softc[unit];
  51         struct fhpibdevice *hd = (void *)hs->sc_addr;
  52
  53         if (hd->hpib_cid != HPIBC)
  54                 return 0;
  55         hs->sc_type = HPIBC;
  56         hs->sc_ba = HPIBC_BA;
  57         fhpibreset(unit);
  58         return 1;
  59 }
  60
  61 void
  62 fhpibreset(int unit)
  63 {
  64         struct hpib_softc *hs = &hpib_softc[unit];
  65         struct fhpibdevice *hd;
  66
  67         hd = (void *)hs->sc_addr;
  68         hd->hpib_cid = 0xFF;
  69         DELAY(100);
  70         hd->hpib_cmd = CT_8BIT;
  71         hd->hpib_ar = AR_ARONC;
  72         hd->hpib_cmd |= CT_IFC;
  73         hd->hpib_cmd |= CT_INITFIFO;
  74         DELAY(100);
  75         hd->hpib_cmd &= ~CT_IFC;
  76         hd->hpib_cmd |= CT_REN;
  77         hd->hpib_stat = ST_ATN;
  78         hd->hpib_data = C_DCL;
  79         DELAY(100000);
  80 }
  81
  82 int
  83 fhpibsend(int unit, int slave, int sec, uint8_t *buf, int cnt)
  84 {
  85         struct hpib_softc *hs = &hpib_softc[unit];
  86         struct fhpibdevice *hd;
  87         int origcnt = cnt;
  88
  89         hd = (void *)hs->sc_addr;
  90         hd->hpib_stat = 0;
  91         hd->hpib_imask = IM_IDLE | IM_ROOM;
  92         fhpibwait(hd, IM_IDLE);
  93         hd->hpib_stat = ST_ATN;
  94         hd->hpib_data = C_UNL;
  95         hd->hpib_data = C_TAG + hs->sc_ba;
  96         hd->hpib_data = C_LAG + slave;
  97         if (sec != -1)
  98                 hd->hpib_data = C_SCG + sec;
  99         fhpibwait(hd, IM_IDLE);
 100         hd->hpib_stat = ST_WRITE;
 101         if (cnt) {
 102                 while (--cnt) {
 103                         hd->hpib_data = *buf++;
 104                         if (fhpibwait(hd, IM_ROOM) < 0)
 105                                 break;
 106                 }
 107                 hd->hpib_stat = ST_EOI;
 108                 hd->hpib_data = *buf;
 109                 if (fhpibwait(hd, IM_ROOM) < 0)
 110                         cnt++;
 111                 hd->hpib_stat = ST_ATN;
 112                 /* XXX: HP-UX claims bug with CS80 transparent messages */
 113                 if (sec == 0x12)
 114                         DELAY(150);
 115                 hd->hpib_data = C_UNL;
 116                 fhpibwait(hd, IM_IDLE);
 117         }
 118         hd->hpib_imask = 0;
 119         return origcnt - cnt;
 120 }
 121
 122 int
 123 fhpibrecv(int unit, int slave, int sec, uint8_t *buf, int cnt)
 124 {
 125         struct hpib_softc *hs = &hpib_softc[unit];
 126         struct fhpibdevice *hd;
 127         int origcnt = cnt;
 128
 129         hd = (void *)hs->sc_addr;
 130         hd->hpib_stat = 0;
 131         hd->hpib_imask = IM_IDLE | IM_ROOM | IM_BYTE;
 132         fhpibwait(hd, IM_IDLE);
 133         hd->hpib_stat = ST_ATN;
 134         hd->hpib_data = C_UNL;
 135         hd->hpib_data = C_LAG + hs->sc_ba;
 136         hd->hpib_data = C_TAG + slave;
 137         if (sec != -1)
 138                 hd->hpib_data = C_SCG + sec;
 139         fhpibwait(hd, IM_IDLE);
 140         hd->hpib_stat = ST_READ0;
 141         hd->hpib_data = 0;
 142         if (cnt) {
 143                 while (--cnt >= 0) {
 144                         if (fhpibwait(hd, IM_BYTE) < 0)
 145                                 break;
 146                         *buf++ = hd->hpib_data;
 147                 }
 148                 cnt++;
 149                 fhpibwait(hd, IM_ROOM);
 150                 hd->hpib_stat = ST_ATN;
 151                 hd->hpib_data = (slave == 31) ? C_UNA : C_UNT;
 152                 fhpibwait(hd, IM_IDLE);
 153         }
 154         hd->hpib_imask = 0;
 155         return origcnt - cnt;
 156 }
 157
 158 int
 159 fhpibppoll(int unit)
 160 {
 161         struct hpib_softc *hs = &hpib_softc[unit];
 162         struct fhpibdevice *hd;
 163         int ppoll;
 164
 165         hd = (void *)hs->sc_addr;
 166         hd->hpib_stat = 0;
 167         hd->hpib_psense = 0;
 168         hd->hpib_pmask = 0xFF;
 169         hd->hpib_imask = IM_PPRESP | IM_PABORT;
 170         DELAY(25);
 171         hd->hpib_intr = IM_PABORT;
 172         ppoll = hd->hpib_data;
 173         if (hd->hpib_intr & IM_PABORT)
 174                 ppoll = 0;
 175         hd->hpib_imask = 0;
 176         hd->hpib_pmask = 0;
 177         hd->hpib_stat = ST_IENAB;
 178         return ppoll;
 179 }
 180
 181 static int
 182 fhpibwait(struct fhpibdevice *hd, uint8_t x)
 183 {
 184         int timo = 100000;
 185
 186         while ((hd->hpib_intr & x) == 0 && --timo)
 187                 ;
 188         if (timo == 0)
 189                 return -1;
 190         return 0;
 191 }