1 /* $NetBSD: drsc.c,v 1.9 1996/12/23 09:09:57 veego Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Ignatios Souvatzis 5 * Copyright (c) 1994 Michael L. Hitch 6 * Copyright (c) 1982, 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)dma.c 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/device.h> 44 #include <scsi/scsi_all.h> 45 #include <scsi/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/amiga/drcustom.h> 53 54 void drscattach __P((struct device *, struct device *, void *)); 55 int drscmatch __P((struct device *, struct cfdata *, void *)); 56 int drsc_dmaintr __P((struct siop_softc *)); 57 #ifdef DEBUG 58 void drsc_dump __P((void)); 59 #endif 60 61 struct scsi_adapter drsc_scsiswitch = { 62 siop_scsicmd, 63 siop_minphys, 64 0, /* no lun support */ 65 0, /* no lun support */ 66 }; 67 68 struct scsi_device drsc_scsidev = { 69 NULL, /* use default error handler */ 70 NULL, /* do not have a start functio */ 71 NULL, /* have no async handler */ 72 NULL, /* Use default done routine */ 73 }; 74 75 76 #ifdef DEBUG 77 #endif 78 79 struct cfattach drsc_ca = { 80 sizeof(struct siop_softc), 81 drscmatch, 82 drscattach 83 }; 84 85 struct cfdriver drsc_cd = { 86 NULL, "drsc", DV_DULL, NULL, 0 87 }; 88 89 static struct siop_softc *drsc_softc; 90 91 /* 92 * One of us is on every DraCo motherboard, 93 */ 94 int 95 drscmatch(pdp, cfp, auxp) 96 struct device *pdp; 97 struct cfdata *cfp; 98 void *auxp; 99 { 100 if (is_draco() && matchname(auxp, "drsc") && (cfp->cf_unit == 0)) 101 return(1); 102 return(0); 103 } 104 105 void 106 drscattach(pdp, dp, auxp) 107 struct device *pdp, *dp; 108 void *auxp; 109 { 110 struct siop_softc *sc; 111 struct zbus_args *zap; 112 siop_regmap_p rp; 113 114 printf("\n"); 115 116 zap = auxp; 117 118 sc = (struct siop_softc *)dp; 119 sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+NBPG*DRSCSIPG); 120 121 /* 122 * CTEST7 = TT1 123 */ 124 sc->sc_clock_freq = 50; /* Clock = 50MHz */ 125 sc->sc_ctest7 = 0x02; 126 127 alloc_sicallback(); 128 129 sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; 130 sc->sc_link.adapter_softc = sc; 131 sc->sc_link.adapter_target = 7; 132 sc->sc_link.adapter = &drsc_scsiswitch; 133 sc->sc_link.device = &drsc_scsidev; 134 sc->sc_link.openings = 2; 135 sc->sc_link.max_target = 7; 136 137 siopinitialize(sc); 138 139 #if 0 140 sc->sc_isr.isr_intr = drsc_dmaintr; 141 sc->sc_isr.isr_arg = sc; 142 sc->sc_isr.isr_ipl = 4; 143 add_isr(&sc->sc_isr); 144 #else 145 drsc_softc = sc; 146 *draco_intpen &= ~DRIRQ_SCSI; 147 *draco_intena |= DRIRQ_SCSI; 148 #endif 149 /* 150 * attach all scsi units on us 151 */ 152 config_found(dp, &sc->sc_link, scsiprint); 153 } 154 155 /* 156 * Level 4 interrupt processing for the MacroSystem DraCo mainboard 157 * SCSI. Because the level 4 interrupt is above splbio, the 158 * interrupt status is saved and an sicallback to the level 2 interrupt 159 * handler scheduled. This way, the actual processing of the interrupt 160 * can be deferred until splbio is unblocked. 161 */ 162 163 void 164 drsc_handler() 165 { 166 struct siop_softc *sc = drsc_softc; 167 168 siop_regmap_p rp; 169 int istat; 170 171 if (sc->sc_flags & SIOP_INTSOFF) 172 return; /* interrupts are not active */ 173 174 rp = sc->sc_siopp; 175 istat = rp->siop_istat; 176 177 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 178 return; 179 180 /* 181 * save interrupt status, DMA status, and SCSI status 0 182 * (may need to deal with stacked interrupts?) 183 */ 184 sc->sc_sstat0 = rp->siop_sstat0; 185 sc->sc_istat = istat; 186 sc->sc_dstat = rp->siop_dstat; 187 /* 188 * disable interrupts until the callback can process this 189 * interrupt. 190 */ 191 #ifdef DRSC_NOCALLBACK 192 (void)spl1(); 193 siopintr(sc); 194 #else 195 rp->siop_sien = 0; 196 rp->siop_dien = 0; 197 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 198 *draco_intpen &= ~DRIRQ_SCSI; 199 #ifdef DEBUG 200 if (*draco_intpen & DRIRQ_SCSI) 201 printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname, 202 *draco_intpen); 203 #endif 204 add_sicallback((sifunc_t)siopintr, sc, NULL); 205 #endif 206 return; 207 } 208 209 #ifdef DEBUG 210 void 211 drsc_dump() 212 { 213 int i; 214 215 for (i = 0; i < drsc_cd.cd_ndevs; ++i) 216 if (drsc_cd.cd_devs[i]) 217 siop_dump(drsc_cd.cd_devs[i]); 218 } 219 #endif 220