1 /* $NetBSD: nhpib.c,v 1.3 2003/11/14 16:52:40 tsutsui 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 static int nhpibiwait(struct nhpibdevice *); 46 static int nhpibowait(struct nhpibdevice *); 47 48 int 49 nhpibinit(unit) 50 { 51 struct hpib_softc *hs = &hpib_softc[unit]; 52 struct nhpibdevice *hd = (void *)hs->sc_addr; 53 54 if ((int)hd == internalhpib) { 55 hs->sc_type = HPIBA; 56 hs->sc_ba = HPIBA_BA; 57 } 58 else if (hd->hpib_cid == HPIBB) { 59 hs->sc_type = HPIBB; 60 hs->sc_ba = hd->hpib_csa & CSA_BA; 61 } 62 else 63 return 0; 64 nhpibreset(unit); 65 return 1; 66 } 67 68 void 69 nhpibreset(unit) 70 { 71 struct hpib_softc *hs = &hpib_softc[unit]; 72 struct nhpibdevice *hd; 73 74 hd = (void *)hs->sc_addr; 75 hd->hpib_acr = AUX_SSWRST; 76 hd->hpib_ar = hs->sc_ba; 77 hd->hpib_lim = 0; 78 hd->hpib_mim = 0; 79 hd->hpib_acr = AUX_CDAI; 80 hd->hpib_acr = AUX_CSHDW; 81 hd->hpib_acr = AUX_SSTD1; 82 hd->hpib_acr = AUX_SVSTD1; 83 hd->hpib_acr = AUX_CPP; 84 hd->hpib_acr = AUX_CHDFA; 85 hd->hpib_acr = AUX_CHDFE; 86 hd->hpib_acr = AUX_RHDF; 87 hd->hpib_acr = AUX_CSWRST; 88 hd->hpib_acr = AUX_TCA; 89 hd->hpib_acr = AUX_CSRE; 90 hd->hpib_acr = AUX_SSIC; 91 DELAY(100); 92 hd->hpib_acr = AUX_CSIC; 93 hd->hpib_acr = AUX_SSRE; 94 hd->hpib_data = C_DCL; 95 DELAY(100000); 96 } 97 98 int 99 nhpibsend(unit, slave, sec, buf, cnt) 100 int unit, slave, sec; 101 char *buf; 102 int cnt; 103 { 104 struct hpib_softc *hs = &hpib_softc[unit]; 105 struct nhpibdevice *hd; 106 int origcnt = cnt; 107 108 hd = (void *)hs->sc_addr; 109 hd->hpib_acr = AUX_TCA; 110 hd->hpib_data = C_UNL; 111 nhpibowait(hd); 112 hd->hpib_data = C_TAG + hs->sc_ba; 113 hd->hpib_acr = AUX_STON; 114 nhpibowait(hd); 115 hd->hpib_data = C_LAG + slave; 116 nhpibowait(hd); 117 if (sec != -1) { 118 hd->hpib_data = C_SCG + sec; 119 nhpibowait(hd); 120 } 121 hd->hpib_acr = AUX_GTS; 122 if (cnt) { 123 while (--cnt) { 124 hd->hpib_data = *buf++; 125 if (nhpibowait(hd) < 0) 126 break; 127 } 128 hd->hpib_acr = AUX_EOI; 129 hd->hpib_data = *buf; 130 if (nhpibowait(hd) < 0) 131 cnt++; 132 hd->hpib_acr = AUX_TCA; 133 } 134 return origcnt - cnt; 135 } 136 137 int 138 nhpibrecv(unit, slave, sec, buf, cnt) 139 int unit, slave, sec; 140 char *buf; 141 int cnt; 142 { 143 struct hpib_softc *hs = &hpib_softc[unit]; 144 struct nhpibdevice *hd; 145 int origcnt = cnt; 146 147 hd = (void *)hs->sc_addr; 148 hd->hpib_acr = AUX_TCA; 149 hd->hpib_data = C_UNL; 150 nhpibowait(hd); 151 hd->hpib_data = C_LAG + hs->sc_ba; 152 hd->hpib_acr = AUX_SLON; 153 nhpibowait(hd); 154 hd->hpib_data = C_TAG + slave; 155 nhpibowait(hd); 156 if (sec != -1) { 157 hd->hpib_data = C_SCG + sec; 158 nhpibowait(hd); 159 } 160 hd->hpib_acr = AUX_RHDF; 161 hd->hpib_acr = AUX_GTS; 162 if (cnt) { 163 while (--cnt >= 0) { 164 if (nhpibiwait(hd) < 0) 165 break; 166 *buf++ = hd->hpib_data; 167 } 168 cnt++; 169 hd->hpib_acr = AUX_TCA; 170 } 171 return origcnt - cnt; 172 } 173 174 int 175 nhpibppoll(unit) 176 int unit; 177 { 178 struct hpib_softc *hs = &hpib_softc[unit]; 179 struct nhpibdevice *hd; 180 int ppoll; 181 182 hd = (void *)hs->sc_addr; 183 hd->hpib_acr = AUX_SPP; 184 DELAY(25); 185 ppoll = hd->hpib_cpt; 186 hd->hpib_acr = AUX_CPP; 187 return ppoll; 188 } 189 190 static int 191 nhpibowait(hd) 192 struct nhpibdevice *hd; 193 { 194 int timo = 100000; 195 196 while ((hd->hpib_mis & MIS_BO) == 0 && --timo) 197 ; 198 if (timo == 0) 199 return -1; 200 return 0; 201 } 202 203 static int 204 nhpibiwait(hd) 205 struct nhpibdevice *hd; 206 { 207 int timo = 100000; 208 209 while ((hd->hpib_mis & MIS_BI) == 0 && --timo) 210 ; 211 if (timo == 0) 212 return -1; 213 return 0; 214 } 215