1 /* $NetBSD: nhpib.c,v 1.1 1997/02/04 03:52:43 thorpej 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)nhpib.c 8.1 (Berkeley) 6/10/93 36 */ 37 38 /* 39 * Internal/98624 HPIB driver 40 */ 41 42 #include <sys/param.h> 43 44 #include <hp300/dev/nhpibreg.h> 45 46 #include <hp300/stand/common/hpibvar.h> 47 #include <hp300/stand/common/samachdep.h> 48 49 nhpibinit(unit) 50 { 51 register struct hpib_softc *hs = &hpib_softc[unit]; 52 register struct nhpibdevice *hd = (struct nhpibdevice *)hs->sc_addr; 53 extern int internalhpib; 54 55 if ((int)hd == internalhpib) { 56 hs->sc_type = HPIBA; 57 hs->sc_ba = HPIBA_BA; 58 } 59 else if (hd->hpib_cid == HPIBB) { 60 hs->sc_type = HPIBB; 61 hs->sc_ba = hd->hpib_csa & CSA_BA; 62 } 63 else 64 return(0); 65 nhpibreset(unit); 66 return(1); 67 } 68 69 nhpibreset(unit) 70 { 71 register struct hpib_softc *hs = &hpib_softc[unit]; 72 register struct nhpibdevice *hd; 73 74 hd = (struct nhpibdevice *)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 nhpibsend(unit, slave, sec, buf, cnt) 99 register char *buf; 100 register int cnt; 101 { 102 register struct hpib_softc *hs = &hpib_softc[unit]; 103 register struct nhpibdevice *hd; 104 register int origcnt = cnt; 105 106 hd = (struct nhpibdevice *)hs->sc_addr; 107 hd->hpib_acr = AUX_TCA; 108 hd->hpib_data = C_UNL; 109 nhpibowait(hd); 110 hd->hpib_data = C_TAG + hs->sc_ba; 111 hd->hpib_acr = AUX_STON; 112 nhpibowait(hd); 113 hd->hpib_data = C_LAG + slave; 114 nhpibowait(hd); 115 if (sec != -1) { 116 hd->hpib_data = C_SCG + sec; 117 nhpibowait(hd); 118 } 119 hd->hpib_acr = AUX_GTS; 120 if (cnt) { 121 while (--cnt) { 122 hd->hpib_data = *buf++; 123 if (nhpibowait(hd) < 0) 124 break; 125 } 126 hd->hpib_acr = AUX_EOI; 127 hd->hpib_data = *buf; 128 if (nhpibowait(hd) < 0) 129 cnt++; 130 hd->hpib_acr = AUX_TCA; 131 } 132 return(origcnt - cnt); 133 } 134 135 nhpibrecv(unit, slave, sec, buf, cnt) 136 register char *buf; 137 register int cnt; 138 { 139 register struct hpib_softc *hs = &hpib_softc[unit]; 140 register struct nhpibdevice *hd; 141 register int origcnt = cnt; 142 143 hd = (struct nhpibdevice *)hs->sc_addr; 144 hd->hpib_acr = AUX_TCA; 145 hd->hpib_data = C_UNL; 146 nhpibowait(hd); 147 hd->hpib_data = C_LAG + hs->sc_ba; 148 hd->hpib_acr = AUX_SLON; 149 nhpibowait(hd); 150 hd->hpib_data = C_TAG + slave; 151 nhpibowait(hd); 152 if (sec != -1) { 153 hd->hpib_data = C_SCG + sec; 154 nhpibowait(hd); 155 } 156 hd->hpib_acr = AUX_RHDF; 157 hd->hpib_acr = AUX_GTS; 158 if (cnt) { 159 while (--cnt >= 0) { 160 if (nhpibiwait(hd) < 0) 161 break; 162 *buf++ = hd->hpib_data; 163 } 164 cnt++; 165 hd->hpib_acr = AUX_TCA; 166 } 167 return(origcnt - cnt); 168 } 169 170 nhpibppoll(unit) 171 register int unit; 172 { 173 register struct hpib_softc *hs = &hpib_softc[unit]; 174 register struct nhpibdevice *hd; 175 register int ppoll; 176 177 hd = (struct nhpibdevice *)hs->sc_addr; 178 hd->hpib_acr = AUX_SPP; 179 DELAY(25); 180 ppoll = hd->hpib_cpt; 181 hd->hpib_acr = AUX_CPP; 182 return(ppoll); 183 } 184 185 nhpibowait(hd) 186 register struct nhpibdevice *hd; 187 { 188 register int timo = 100000; 189 190 while ((hd->hpib_mis & MIS_BO) == 0 && --timo) 191 ; 192 if (timo == 0) 193 return(-1); 194 return(0); 195 } 196 197 nhpibiwait(hd) 198 register struct nhpibdevice *hd; 199 { 200 register int timo = 100000; 201 202 while ((hd->hpib_mis & MIS_BI) == 0 && --timo) 203 ; 204 if (timo == 0) 205 return(-1); 206 return(0); 207 } 208