mgnsc.c revision 1.22
1 /* $NetBSD: mgnsc.c,v 1.22 1996/10/13 03:07:24 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Michael L. Hitch 5 * Copyright (c) 1982, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)dma.c 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <scsi/scsi_all.h> 44 #include <scsi/scsiconf.h> 45 #include <amiga/amiga/custom.h> 46 #include <amiga/amiga/cc.h> 47 #include <amiga/amiga/device.h> 48 #include <amiga/amiga/isr.h> 49 #include <amiga/dev/siopreg.h> 50 #include <amiga/dev/siopvar.h> 51 #include <amiga/dev/zbusvar.h> 52 53 void mgnscattach __P((struct device *, struct device *, void *)); 54 int mgnscmatch __P((struct device *, void *, void *)); 55 int mgnsc_dmaintr __P((void *)); 56 #ifdef DEBUG 57 void mgnsc_dump __P((void)); 58 #endif 59 60 struct scsi_adapter mgnsc_scsiswitch = { 61 siop_scsicmd, 62 siop_minphys, 63 0, /* no lun support */ 64 0, /* no lun support */ 65 }; 66 67 struct scsi_device mgnsc_scsidev = { 68 NULL, /* use default error handler */ 69 NULL, /* do not have a start functio */ 70 NULL, /* have no async handler */ 71 NULL, /* Use default done routine */ 72 }; 73 74 75 #ifdef DEBUG 76 #endif 77 78 struct cfattach mgnsc_ca = { 79 sizeof(struct siop_softc), mgnscmatch, mgnscattach 80 }; 81 82 struct cfdriver mgnsc_cd = { 83 NULL, "mgnsc", DV_DULL, NULL, 0 84 }; 85 86 /* 87 * if we are a CSA Magnum 40 SCSI 88 */ 89 int 90 mgnscmatch(pdp, match, auxp) 91 struct device *pdp; 92 void *match, *auxp; 93 { 94 struct zbus_args *zap; 95 96 zap = auxp; 97 if (zap->manid == 1058 && zap->prodid == 17) 98 return(1); 99 return(0); 100 } 101 102 void 103 mgnscattach(pdp, dp, auxp) 104 struct device *pdp, *dp; 105 void *auxp; 106 { 107 struct siop_softc *sc; 108 struct zbus_args *zap; 109 siop_regmap_p rp; 110 111 printf("\n"); 112 zap = auxp; 113 114 sc = (struct siop_softc *)dp; 115 sc->sc_siopp = rp = zap->va + 0x8000; 116 117 /* 118 * CTEST7 = TT1 119 */ 120 sc->sc_clock_freq = 33; /* Clock = 33Mhz */ 121 sc->sc_ctest7 = SIOP_CTEST7_TT1; 122 sc->sc_dcntl = 0x00; 123 124 alloc_sicallback(); 125 126 sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; 127 sc->sc_link.adapter_softc = sc; 128 sc->sc_link.adapter_target = 7; 129 sc->sc_link.adapter = &mgnsc_scsiswitch; 130 sc->sc_link.device = &mgnsc_scsidev; 131 sc->sc_link.openings = 2; 132 133 siopinitialize(sc); 134 135 sc->sc_isr.isr_intr = mgnsc_dmaintr; 136 sc->sc_isr.isr_arg = sc; 137 sc->sc_isr.isr_ipl = 6; 138 add_isr (&sc->sc_isr); 139 140 /* 141 * attach all scsi units on us 142 */ 143 config_found(dp, &sc->sc_link, scsiprint); 144 } 145 146 /* 147 * Level 6 interrupt processing for the Magnum/40 SCSI. Because the 148 * level 6 interrupt is above splbio, the interrupt status is saved 149 * and an sicallback to the level 2 interrupt handler scheduled. 150 * This way, the actual processing of the interrupt can be deferred 151 * until splbio is unblocked. 152 */ 153 154 int 155 mgnsc_dmaintr(arg) 156 void *arg; 157 { 158 struct siop_softc *sc = arg; 159 siop_regmap_p rp; 160 u_char istat; 161 162 if (sc->sc_flags & SIOP_INTSOFF) 163 return (0); /* interrupts are not active */ 164 rp = sc->sc_siopp; 165 istat = rp->siop_istat; 166 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 167 return (0); 168 /* 169 * save interrupt status, DMA status, and SCSI status 0 170 * (may need to deal with stacked interrupts?) 171 */ 172 sc->sc_sstat0 = rp->siop_sstat0; 173 sc->sc_istat = istat; 174 sc->sc_dstat = rp->siop_dstat; 175 /* 176 * disable interrupts until the callback can process this 177 * interrupt. 178 */ 179 rp->siop_sien = 0; 180 rp->siop_dien = 0; 181 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 182 add_sicallback((sifunc_t)siopintr, sc, NULL); 183 return (1); 184 } 185 186 #ifdef DEBUG 187 void 188 mgnsc_dump() 189 { 190 int i; 191 192 for (i = 0; i < mgnsc_cd.cd_ndevs; ++i) 193 if (mgnsc_cd.cd_devs[i]) 194 siop_dump(mgnsc_cd.cd_devs[i]); 195 } 196 #endif 197
Indexes created Tue Sep 23 21:09:50 GMT 2025