mgnsc.c revision 1.28
1 /* $NetBSD: mgnsc.c,v 1.28 1998/11/19 21:44:36 thorpej 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 <dev/scsipi/scsi_all.h> 44 #include <dev/scsipi/scsipi_all.h> 45 #include <dev/scsipi/scsiconf.h> 46 #include <amiga/amiga/custom.h> 47 #include <amiga/amiga/cc.h> 48 #include <amiga/amiga/device.h> 49 #include <amiga/amiga/isr.h> 50 #include <amiga/dev/siopreg.h> 51 #include <amiga/dev/siopvar.h> 52 #include <amiga/dev/zbusvar.h> 53 54 void mgnscattach __P((struct device *, struct device *, void *)); 55 int mgnscmatch __P((struct device *, struct cfdata *, void *)); 56 int mgnsc_dmaintr __P((void *)); 57 #ifdef DEBUG 58 void mgnsc_dump __P((void)); 59 #endif 60 61 struct scsipi_device mgnsc_scsidev = { 62 NULL, /* use default error handler */ 63 NULL, /* do not have a start functio */ 64 NULL, /* have no async handler */ 65 NULL, /* Use default done routine */ 66 }; 67 68 69 #ifdef DEBUG 70 #endif 71 72 struct cfattach mgnsc_ca = { 73 sizeof(struct siop_softc), mgnscmatch, mgnscattach 74 }; 75 76 /* 77 * if we are a CSA Magnum 40 SCSI 78 */ 79 int 80 mgnscmatch(pdp, cfp, auxp) 81 struct device *pdp; 82 struct cfdata *cfp; 83 void *auxp; 84 { 85 struct zbus_args *zap; 86 87 zap = auxp; 88 if (zap->manid == 1058 && zap->prodid == 17) 89 return(1); 90 return(0); 91 } 92 93 void 94 mgnscattach(pdp, dp, auxp) 95 struct device *pdp, *dp; 96 void *auxp; 97 { 98 struct siop_softc *sc; 99 struct zbus_args *zap; 100 siop_regmap_p rp; 101 102 printf("\n"); 103 zap = auxp; 104 105 sc = (struct siop_softc *)dp; 106 sc->sc_siopp = rp = zap->va + 0x8000; 107 108 /* 109 * CTEST7 = TT1 110 */ 111 sc->sc_clock_freq = 33; /* Clock = 33Mhz */ 112 sc->sc_ctest7 = SIOP_CTEST7_TT1; 113 sc->sc_dcntl = 0x00; 114 115 alloc_sicallback(); 116 117 sc->sc_adapter.scsipi_cmd = siop_scsicmd; 118 sc->sc_adapter.scsipi_minphys = siop_minphys; 119 120 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 121 sc->sc_link.adapter_softc = sc; 122 sc->sc_link.scsipi_scsi.adapter_target = 7; 123 sc->sc_link.adapter = &sc->sc_adapter; 124 sc->sc_link.device = &mgnsc_scsidev; 125 sc->sc_link.openings = 2; 126 sc->sc_link.scsipi_scsi.max_target = 7; 127 sc->sc_link.type = BUS_SCSI; 128 129 siopinitialize(sc); 130 131 sc->sc_isr.isr_intr = mgnsc_dmaintr; 132 sc->sc_isr.isr_arg = sc; 133 sc->sc_isr.isr_ipl = 6; 134 add_isr (&sc->sc_isr); 135 136 /* 137 * attach all scsi units on us 138 */ 139 config_found(dp, &sc->sc_link, scsiprint); 140 } 141 142 /* 143 * Level 6 interrupt processing for the Magnum/40 SCSI. Because the 144 * level 6 interrupt is above splbio, the interrupt status is saved 145 * and an sicallback to the level 2 interrupt handler scheduled. 146 * This way, the actual processing of the interrupt can be deferred 147 * until splbio is unblocked. 148 */ 149 150 int 151 mgnsc_dmaintr(arg) 152 void *arg; 153 { 154 struct siop_softc *sc = arg; 155 siop_regmap_p rp; 156 u_char istat; 157 158 if (sc->sc_flags & SIOP_INTSOFF) 159 return (0); /* interrupts are not active */ 160 rp = sc->sc_siopp; 161 istat = rp->siop_istat; 162 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 163 return (0); 164 /* 165 * save interrupt status, DMA status, and SCSI status 0 166 * (may need to deal with stacked interrupts?) 167 */ 168 sc->sc_sstat0 = rp->siop_sstat0; 169 sc->sc_istat = istat; 170 sc->sc_dstat = rp->siop_dstat; 171 /* 172 * disable interrupts until the callback can process this 173 * interrupt. 174 */ 175 rp->siop_sien = 0; 176 rp->siop_dien = 0; 177 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 178 add_sicallback((sifunc_t)siopintr, sc, NULL); 179 return (1); 180 } 181 182 #ifdef DEBUG 183 void 184 mgnsc_dump() 185 { 186 extern struct cfdriver mgnsc_cd; 187 int i; 188 189 for (i = 0; i < mgnsc_cd.cd_ndevs; ++i) 190 if (mgnsc_cd.cd_devs[i]) 191 siop_dump(mgnsc_cd.cd_devs[i]); 192 } 193 #endif 194
Indexes created Fri Sep 26 20:09:58 GMT 2025