nhpib.c revision 1.2
1 /* $NetBSD: nhpib.c,v 1.2 2003/08/07 16:27:42 agc 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 * @(#)nhpib.c 8.1 (Berkeley) 6/10/93 32 */ 33 34 /* 35 * Internal/98624 HPIB driver 36 */ 37 38 #include <sys/param.h> 39 40 #include <hp300/dev/nhpibreg.h> 41 42 #include <hp300/stand/common/hpibvar.h> 43 #include <hp300/stand/common/samachdep.h> 44 45 nhpibinit(unit) 46 { 47 register struct hpib_softc *hs = &hpib_softc[unit]; 48 register struct nhpibdevice *hd = (struct nhpibdevice *)hs->sc_addr; 49 extern int internalhpib; 50 51 if ((int)hd == internalhpib) { 52 hs->sc_type = HPIBA; 53 hs->sc_ba = HPIBA_BA; 54 } 55 else if (hd->hpib_cid == HPIBB) { 56 hs->sc_type = HPIBB; 57 hs->sc_ba = hd->hpib_csa & CSA_BA; 58 } 59 else 60 return(0); 61 nhpibreset(unit); 62 return(1); 63 } 64 65 nhpibreset(unit) 66 { 67 register struct hpib_softc *hs = &hpib_softc[unit]; 68 register struct nhpibdevice *hd; 69 70 hd = (struct nhpibdevice *)hs->sc_addr; 71 hd->hpib_acr = AUX_SSWRST; 72 hd->hpib_ar = hs->sc_ba; 73 hd->hpib_lim = 0; 74 hd->hpib_mim = 0; 75 hd->hpib_acr = AUX_CDAI; 76 hd->hpib_acr = AUX_CSHDW; 77 hd->hpib_acr = AUX_SSTD1; 78 hd->hpib_acr = AUX_SVSTD1; 79 hd->hpib_acr = AUX_CPP; 80 hd->hpib_acr = AUX_CHDFA; 81 hd->hpib_acr = AUX_CHDFE; 82 hd->hpib_acr = AUX_RHDF; 83 hd->hpib_acr = AUX_CSWRST; 84 hd->hpib_acr = AUX_TCA; 85 hd->hpib_acr = AUX_CSRE; 86 hd->hpib_acr = AUX_SSIC; 87 DELAY(100); 88 hd->hpib_acr = AUX_CSIC; 89 hd->hpib_acr = AUX_SSRE; 90 hd->hpib_data = C_DCL; 91 DELAY(100000); 92 } 93 94 nhpibsend(unit, slave, sec, buf, cnt) 95 register char *buf; 96 register int cnt; 97 { 98 register struct hpib_softc *hs = &hpib_softc[unit]; 99 register struct nhpibdevice *hd; 100 register int origcnt = cnt; 101 102 hd = (struct nhpibdevice *)hs->sc_addr; 103 hd->hpib_acr = AUX_TCA; 104 hd->hpib_data = C_UNL; 105 nhpibowait(hd); 106 hd->hpib_data = C_TAG + hs->sc_ba; 107 hd->hpib_acr = AUX_STON; 108 nhpibowait(hd); 109 hd->hpib_data = C_LAG + slave; 110 nhpibowait(hd); 111 if (sec != -1) { 112 hd->hpib_data = C_SCG + sec; 113 nhpibowait(hd); 114 } 115 hd->hpib_acr = AUX_GTS; 116 if (cnt) { 117 while (--cnt) { 118 hd->hpib_data = *buf++; 119 if (nhpibowait(hd) < 0) 120 break; 121 } 122 hd->hpib_acr = AUX_EOI; 123 hd->hpib_data = *buf; 124 if (nhpibowait(hd) < 0) 125 cnt++; 126 hd->hpib_acr = AUX_TCA; 127 } 128 return(origcnt - cnt); 129 } 130 131 nhpibrecv(unit, slave, sec, buf, cnt) 132 register char *buf; 133 register int cnt; 134 { 135 register struct hpib_softc *hs = &hpib_softc[unit]; 136 register struct nhpibdevice *hd; 137 register int origcnt = cnt; 138 139 hd = (struct nhpibdevice *)hs->sc_addr; 140 hd->hpib_acr = AUX_TCA; 141 hd->hpib_data = C_UNL; 142 nhpibowait(hd); 143 hd->hpib_data = C_LAG + hs->sc_ba; 144 hd->hpib_acr = AUX_SLON; 145 nhpibowait(hd); 146 hd->hpib_data = C_TAG + slave; 147 nhpibowait(hd); 148 if (sec != -1) { 149 hd->hpib_data = C_SCG + sec; 150 nhpibowait(hd); 151 } 152 hd->hpib_acr = AUX_RHDF; 153 hd->hpib_acr = AUX_GTS; 154 if (cnt) { 155 while (--cnt >= 0) { 156 if (nhpibiwait(hd) < 0) 157 break; 158 *buf++ = hd->hpib_data; 159 } 160 cnt++; 161 hd->hpib_acr = AUX_TCA; 162 } 163 return(origcnt - cnt); 164 } 165 166 nhpibppoll(unit) 167 register int unit; 168 { 169 register struct hpib_softc *hs = &hpib_softc[unit]; 170 register struct nhpibdevice *hd; 171 register int ppoll; 172 173 hd = (struct nhpibdevice *)hs->sc_addr; 174 hd->hpib_acr = AUX_SPP; 175 DELAY(25); 176 ppoll = hd->hpib_cpt; 177 hd->hpib_acr = AUX_CPP; 178 return(ppoll); 179 } 180 181 nhpibowait(hd) 182 register struct nhpibdevice *hd; 183 { 184 register int timo = 100000; 185 186 while ((hd->hpib_mis & MIS_BO) == 0 && --timo) 187 ; 188 if (timo == 0) 189 return(-1); 190 return(0); 191 } 192 193 nhpibiwait(hd) 194 register struct nhpibdevice *hd; 195 { 196 register int timo = 100000; 197 198 while ((hd->hpib_mis & MIS_BI) == 0 && --timo) 199 ; 200 if (timo == 0) 201 return(-1); 202 return(0); 203 } 204
Indexes created Thu Sep 25 16:09:42 GMT 2025