1 /* $NetBSD: drsc.c,v 1.16 2000/01/16 21:19:44 is 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 #include <machine/cpu.h> /* is_xxx(), */ 56 57 void drscattach __P((struct device *, struct device *, void *)); 58 int drscmatch __P((struct device *, struct cfdata *, void *)); 59 int drsc_dmaintr __P((struct siop_softc *)); 60 #ifdef DEBUG 61 void drsc_dump __P((void)); 62 #endif 63 64 struct scsipi_device drsc_scsidev = { 65 NULL, /* use default error handler */ 66 NULL, /* do not have a start functio */ 67 NULL, /* have no async handler */ 68 NULL, /* Use default done routine */ 69 }; 70 71 72 #ifdef DEBUG 73 #endif 74 75 struct cfattach drsc_ca = { 76 sizeof(struct siop_softc), 77 drscmatch, 78 drscattach 79 }; 80 81 static struct siop_softc *drsc_softc; 82 83 /* 84 * One of us is on every DraCo motherboard, 85 */ 86 int 87 drscmatch(pdp, cfp, auxp) 88 struct device *pdp; 89 struct cfdata *cfp; 90 void *auxp; 91 { 92 if (is_draco() && matchname(auxp, "drsc") && (cfp->cf_unit == 0)) 93 return(1); 94 return(0); 95 } 96 97 void 98 drscattach(pdp, dp, auxp) 99 struct device *pdp, *dp; 100 void *auxp; 101 { 102 struct siop_softc *sc; 103 struct zbus_args *zap; 104 siop_regmap_p rp; 105 106 printf("\n"); 107 108 zap = auxp; 109 110 sc = (struct siop_softc *)dp; 111 sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+NBPG*DRSCSIPG); 112 113 /* 114 * CTEST7 = TT1 115 */ 116 sc->sc_clock_freq = 50; /* Clock = 50MHz */ 117 sc->sc_ctest7 = 0x02; 118 119 alloc_sicallback(); 120 121 sc->sc_adapter.scsipi_cmd = siop_scsicmd; 122 sc->sc_adapter.scsipi_minphys = siop_minphys; 123 124 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 125 sc->sc_link.adapter_softc = sc; 126 sc->sc_link.scsipi_scsi.adapter_target = 7; 127 sc->sc_link.adapter = &sc->sc_adapter; 128 sc->sc_link.device = &drsc_scsidev; 129 sc->sc_link.openings = 2; 130 sc->sc_link.scsipi_scsi.max_target = 7; 131 sc->sc_link.scsipi_scsi.max_lun = 7; 132 sc->sc_link.type = BUS_SCSI; 133 134 siopinitialize(sc); 135 136 #if 0 137 sc->sc_isr.isr_intr = drsc_dmaintr; 138 sc->sc_isr.isr_arg = sc; 139 sc->sc_isr.isr_ipl = 4; 140 add_isr(&sc->sc_isr); 141 #else 142 drsc_softc = sc; 143 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 144 single_inst_bset_b(*draco_intena, DRIRQ_SCSI); 145 #endif 146 /* 147 * attach all scsi units on us 148 */ 149 config_found(dp, &sc->sc_link, scsiprint); 150 } 151 152 /* 153 * Level 4 interrupt processing for the MacroSystem DraCo mainboard 154 * SCSI. Because the level 4 interrupt is above splbio, the 155 * interrupt status is saved and an sicallback to the level 2 interrupt 156 * handler scheduled. This way, the actual processing of the interrupt 157 * can be deferred until splbio is unblocked. 158 */ 159 160 void 161 drsc_handler() 162 { 163 struct siop_softc *sc = drsc_softc; 164 165 siop_regmap_p rp; 166 int istat; 167 168 if (sc->sc_flags & SIOP_INTSOFF) 169 return; /* interrupts are not active */ 170 171 rp = sc->sc_siopp; 172 istat = rp->siop_istat; 173 174 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 175 return; 176 177 /* 178 * save interrupt status, DMA status, and SCSI status 0 179 * (may need to deal with stacked interrupts?) 180 */ 181 sc->sc_sstat0 = rp->siop_sstat0; 182 sc->sc_istat = istat; 183 sc->sc_dstat = rp->siop_dstat; 184 /* 185 * disable interrupts until the callback can process this 186 * interrupt. 187 */ 188 #ifdef DRSC_NOCALLBACK 189 (void)spl1(); 190 siopintr(sc); 191 #else 192 rp->siop_sien = 0; 193 rp->siop_dien = 0; 194 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 195 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 196 #ifdef DEBUG 197 if (*draco_intpen & DRIRQ_SCSI) 198 printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname, 199 *draco_intpen); 200 #endif 201 add_sicallback((sifunc_t)siopintr, sc, NULL); 202 #endif 203 return; 204 } 205 206 #ifdef DEBUG 207 void 208 drsc_dump() 209 { 210 extern struct cfdriver drsc_cd; 211 int i; 212 213 for (i = 0; i < drsc_cd.cd_ndevs; ++i) 214 if (drsc_cd.cd_devs[i]) 215 siop_dump(drsc_cd.cd_devs[i]); 216 } 217 #endif 218