1 /* $NetBSD: drsc.c,v 1.10 1997/08/27 11:23:06 bouyer 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 <dev/scsipi/scsi_all.h> 45 #include <dev/scsipi/scsipi_all.h> 46 #include <dev/scsipi/scsiconf.h> 47 #include <amiga/amiga/custom.h> 48 #include <amiga/amiga/cc.h> 49 #include <amiga/amiga/device.h> 50 #include <amiga/amiga/isr.h> 51 #include <amiga/dev/siopreg.h> 52 #include <amiga/dev/siopvar.h> 53 #include <amiga/amiga/drcustom.h> 54 55 void drscattach __P((struct device *, struct device *, void *)); 56 int drscmatch __P((struct device *, struct cfdata *, void *)); 57 int drsc_dmaintr __P((struct siop_softc *)); 58 #ifdef DEBUG 59 void drsc_dump __P((void)); 60 #endif 61 62 struct scsipi_adapter drsc_scsiswitch = { 63 siop_scsicmd, 64 siop_minphys, 65 0, /* no lun support */ 66 0, /* no lun support */ 67 }; 68 69 struct scsipi_device drsc_scsidev = { 70 NULL, /* use default error handler */ 71 NULL, /* do not have a start functio */ 72 NULL, /* have no async handler */ 73 NULL, /* Use default done routine */ 74 }; 75 76 77 #ifdef DEBUG 78 #endif 79 80 struct cfattach drsc_ca = { 81 sizeof(struct siop_softc), 82 drscmatch, 83 drscattach 84 }; 85 86 struct cfdriver drsc_cd = { 87 NULL, "drsc", DV_DULL, NULL, 0 88 }; 89 90 static struct siop_softc *drsc_softc; 91 92 /* 93 * One of us is on every DraCo motherboard, 94 */ 95 int 96 drscmatch(pdp, cfp, auxp) 97 struct device *pdp; 98 struct cfdata *cfp; 99 void *auxp; 100 { 101 if (is_draco() && matchname(auxp, "drsc") && (cfp->cf_unit == 0)) 102 return(1); 103 return(0); 104 } 105 106 void 107 drscattach(pdp, dp, auxp) 108 struct device *pdp, *dp; 109 void *auxp; 110 { 111 struct siop_softc *sc; 112 struct zbus_args *zap; 113 siop_regmap_p rp; 114 115 printf("\n"); 116 117 zap = auxp; 118 119 sc = (struct siop_softc *)dp; 120 sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+NBPG*DRSCSIPG); 121 122 /* 123 * CTEST7 = TT1 124 */ 125 sc->sc_clock_freq = 50; /* Clock = 50MHz */ 126 sc->sc_ctest7 = 0x02; 127 128 alloc_sicallback(); 129 130 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 131 sc->sc_link.adapter_softc = sc; 132 sc->sc_link.scsipi_scsi.adapter_target = 7; 133 sc->sc_link.adapter = &drsc_scsiswitch; 134 sc->sc_link.device = &drsc_scsidev; 135 sc->sc_link.openings = 2; 136 sc->sc_link.scsipi_scsi.max_target = 7; 137 sc->sc_link.type = BUS_SCSI; 138 139 siopinitialize(sc); 140 141 #if 0 142 sc->sc_isr.isr_intr = drsc_dmaintr; 143 sc->sc_isr.isr_arg = sc; 144 sc->sc_isr.isr_ipl = 4; 145 add_isr(&sc->sc_isr); 146 #else 147 drsc_softc = sc; 148 *draco_intpen &= ~DRIRQ_SCSI; 149 *draco_intena |= DRIRQ_SCSI; 150 #endif 151 /* 152 * attach all scsi units on us 153 */ 154 config_found(dp, &sc->sc_link, scsiprint); 155 } 156 157 /* 158 * Level 4 interrupt processing for the MacroSystem DraCo mainboard 159 * SCSI. Because the level 4 interrupt is above splbio, the 160 * interrupt status is saved and an sicallback to the level 2 interrupt 161 * handler scheduled. This way, the actual processing of the interrupt 162 * can be deferred until splbio is unblocked. 163 */ 164 165 void 166 drsc_handler() 167 { 168 struct siop_softc *sc = drsc_softc; 169 170 siop_regmap_p rp; 171 int istat; 172 173 if (sc->sc_flags & SIOP_INTSOFF) 174 return; /* interrupts are not active */ 175 176 rp = sc->sc_siopp; 177 istat = rp->siop_istat; 178 179 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 180 return; 181 182 /* 183 * save interrupt status, DMA status, and SCSI status 0 184 * (may need to deal with stacked interrupts?) 185 */ 186 sc->sc_sstat0 = rp->siop_sstat0; 187 sc->sc_istat = istat; 188 sc->sc_dstat = rp->siop_dstat; 189 /* 190 * disable interrupts until the callback can process this 191 * interrupt. 192 */ 193 #ifdef DRSC_NOCALLBACK 194 (void)spl1(); 195 siopintr(sc); 196 #else 197 rp->siop_sien = 0; 198 rp->siop_dien = 0; 199 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 200 *draco_intpen &= ~DRIRQ_SCSI; 201 #ifdef DEBUG 202 if (*draco_intpen & DRIRQ_SCSI) 203 printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname, 204 *draco_intpen); 205 #endif 206 add_sicallback((sifunc_t)siopintr, sc, NULL); 207 #endif 208 return; 209 } 210 211 #ifdef DEBUG 212 void 213 drsc_dump() 214 { 215 int i; 216 217 for (i = 0; i < drsc_cd.cd_ndevs; ++i) 218 if (drsc_cd.cd_devs[i]) 219 siop_dump(drsc_cd.cd_devs[i]); 220 } 221 #endif 222