1 /* $NetBSD: drsc.c,v 1.15 1998/12/05 19:43:34 mjacob 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_device drsc_scsidev = { 63 NULL, /* use default error handler */ 64 NULL, /* do not have a start functio */ 65 NULL, /* have no async handler */ 66 NULL, /* Use default done routine */ 67 }; 68 69 70 #ifdef DEBUG 71 #endif 72 73 struct cfattach drsc_ca = { 74 sizeof(struct siop_softc), 75 drscmatch, 76 drscattach 77 }; 78 79 static struct siop_softc *drsc_softc; 80 81 /* 82 * One of us is on every DraCo motherboard, 83 */ 84 int 85 drscmatch(pdp, cfp, auxp) 86 struct device *pdp; 87 struct cfdata *cfp; 88 void *auxp; 89 { 90 if (is_draco() && matchname(auxp, "drsc") && (cfp->cf_unit == 0)) 91 return(1); 92 return(0); 93 } 94 95 void 96 drscattach(pdp, dp, auxp) 97 struct device *pdp, *dp; 98 void *auxp; 99 { 100 struct siop_softc *sc; 101 struct zbus_args *zap; 102 siop_regmap_p rp; 103 104 printf("\n"); 105 106 zap = auxp; 107 108 sc = (struct siop_softc *)dp; 109 sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+NBPG*DRSCSIPG); 110 111 /* 112 * CTEST7 = TT1 113 */ 114 sc->sc_clock_freq = 50; /* Clock = 50MHz */ 115 sc->sc_ctest7 = 0x02; 116 117 alloc_sicallback(); 118 119 sc->sc_adapter.scsipi_cmd = siop_scsicmd; 120 sc->sc_adapter.scsipi_minphys = siop_minphys; 121 122 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 123 sc->sc_link.adapter_softc = sc; 124 sc->sc_link.scsipi_scsi.adapter_target = 7; 125 sc->sc_link.adapter = &sc->sc_adapter; 126 sc->sc_link.device = &drsc_scsidev; 127 sc->sc_link.openings = 2; 128 sc->sc_link.scsipi_scsi.max_target = 7; 129 sc->sc_link.scsipi_scsi.max_lun = 7; 130 sc->sc_link.type = BUS_SCSI; 131 132 siopinitialize(sc); 133 134 #if 0 135 sc->sc_isr.isr_intr = drsc_dmaintr; 136 sc->sc_isr.isr_arg = sc; 137 sc->sc_isr.isr_ipl = 4; 138 add_isr(&sc->sc_isr); 139 #else 140 drsc_softc = sc; 141 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 142 single_inst_bset_b(*draco_intena, DRIRQ_SCSI); 143 #endif 144 /* 145 * attach all scsi units on us 146 */ 147 config_found(dp, &sc->sc_link, scsiprint); 148 } 149 150 /* 151 * Level 4 interrupt processing for the MacroSystem DraCo mainboard 152 * SCSI. Because the level 4 interrupt is above splbio, the 153 * interrupt status is saved and an sicallback to the level 2 interrupt 154 * handler scheduled. This way, the actual processing of the interrupt 155 * can be deferred until splbio is unblocked. 156 */ 157 158 void 159 drsc_handler() 160 { 161 struct siop_softc *sc = drsc_softc; 162 163 siop_regmap_p rp; 164 int istat; 165 166 if (sc->sc_flags & SIOP_INTSOFF) 167 return; /* interrupts are not active */ 168 169 rp = sc->sc_siopp; 170 istat = rp->siop_istat; 171 172 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 173 return; 174 175 /* 176 * save interrupt status, DMA status, and SCSI status 0 177 * (may need to deal with stacked interrupts?) 178 */ 179 sc->sc_sstat0 = rp->siop_sstat0; 180 sc->sc_istat = istat; 181 sc->sc_dstat = rp->siop_dstat; 182 /* 183 * disable interrupts until the callback can process this 184 * interrupt. 185 */ 186 #ifdef DRSC_NOCALLBACK 187 (void)spl1(); 188 siopintr(sc); 189 #else 190 rp->siop_sien = 0; 191 rp->siop_dien = 0; 192 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 193 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 194 #ifdef DEBUG 195 if (*draco_intpen & DRIRQ_SCSI) 196 printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname, 197 *draco_intpen); 198 #endif 199 add_sicallback((sifunc_t)siopintr, sc, NULL); 200 #endif 201 return; 202 } 203 204 #ifdef DEBUG 205 void 206 drsc_dump() 207 { 208 extern struct cfdriver drsc_cd; 209 int i; 210 211 for (i = 0; i < drsc_cd.cd_ndevs; ++i) 212 if (drsc_cd.cd_devs[i]) 213 siop_dump(drsc_cd.cd_devs[i]); 214 } 215 #endif 216