1 /* $NetBSD: drsc.c,v 1.18 2001/04/25 17:53:07 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 #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 #ifdef DEBUG 65 #endif 66 67 struct cfattach drsc_ca = { 68 sizeof(struct siop_softc), 69 drscmatch, 70 drscattach 71 }; 72 73 static struct siop_softc *drsc_softc; 74 75 /* 76 * One of us is on every DraCo motherboard, 77 */ 78 int 79 drscmatch(pdp, cfp, auxp) 80 struct device *pdp; 81 struct cfdata *cfp; 82 void *auxp; 83 { 84 static int drsc_matched = 0; 85 86 /* Allow only one instance. */ 87 if (!is_draco() || !matchname(auxp, "drsc") || drsc_matched) 88 return (0); 89 90 drsc_matched = 1; 91 return(1); 92 } 93 94 void 95 drscattach(pdp, dp, auxp) 96 struct device *pdp, *dp; 97 void *auxp; 98 { 99 struct siop_softc *sc = (struct siop_softc *)dp; 100 struct zbus_args *zap; 101 siop_regmap_p rp; 102 struct scsipi_adapter *adapt = &sc->sc_adapter; 103 struct scsipi_channel *chan = &sc->sc_channel; 104 105 printf("\n"); 106 107 zap = auxp; 108 109 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 /* 120 * Fill in the scsipi_adapter. 121 */ 122 memset(adapt, 0, sizeof(*adapt)); 123 adapt->adapt_dev = &sc->sc_dev; 124 adapt->adapt_nchannels = 1; 125 adapt->adapt_openings = 7; 126 adapt->adapt_max_periph = 1; 127 adapt->adapt_request = siop_scsipi_request; 128 adapt->adapt_minphys = siop_minphys; 129 130 /* 131 * Fill in the scsipi_channel. 132 */ 133 memset(chan, 0, sizeof(*chan)); 134 chan->chan_adapter = adapt; 135 chan->chan_bustype = &scsi_bustype; 136 chan->chan_channel = 0; 137 chan->chan_ntargets = 8; 138 chan->chan_nluns = 8; 139 chan->chan_id = 7; 140 141 siopinitialize(sc); 142 143 #if 0 144 sc->sc_isr.isr_intr = drsc_dmaintr; 145 sc->sc_isr.isr_arg = sc; 146 sc->sc_isr.isr_ipl = 4; 147 add_isr(&sc->sc_isr); 148 #else 149 drsc_softc = sc; 150 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 151 single_inst_bset_b(*draco_intena, DRIRQ_SCSI); 152 #endif 153 /* 154 * attach all scsi units on us 155 */ 156 config_found(dp, chan, scsiprint); 157 } 158 159 /* 160 * Level 4 interrupt processing for the MacroSystem DraCo mainboard 161 * SCSI. Because the level 4 interrupt is above splbio, the 162 * interrupt status is saved and an sicallback to the level 2 interrupt 163 * handler scheduled. This way, the actual processing of the interrupt 164 * can be deferred until splbio is unblocked. 165 */ 166 167 void 168 drsc_handler() 169 { 170 struct siop_softc *sc = drsc_softc; 171 172 siop_regmap_p rp; 173 int istat; 174 175 if (sc->sc_flags & SIOP_INTSOFF) 176 return; /* interrupts are not active */ 177 178 rp = sc->sc_siopp; 179 istat = rp->siop_istat; 180 181 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 182 return; 183 184 /* 185 * save interrupt status, DMA status, and SCSI status 0 186 * (may need to deal with stacked interrupts?) 187 */ 188 sc->sc_sstat0 = rp->siop_sstat0; 189 sc->sc_istat = istat; 190 sc->sc_dstat = rp->siop_dstat; 191 /* 192 * disable interrupts until the callback can process this 193 * interrupt. 194 */ 195 #ifdef DRSC_NOCALLBACK 196 (void)spl1(); 197 siopintr(sc); 198 #else 199 rp->siop_sien = 0; 200 rp->siop_dien = 0; 201 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 202 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 203 #ifdef DEBUG 204 if (*draco_intpen & DRIRQ_SCSI) 205 printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname, 206 *draco_intpen); 207 #endif 208 add_sicallback((sifunc_t)siopintr, sc, NULL); 209 #endif 210 return; 211 } 212 213 #ifdef DEBUG 214 void 215 drsc_dump() 216 { 217 extern struct cfdriver drsc_cd; 218 int i; 219 220 for (i = 0; i < drsc_cd.cd_ndevs; ++i) 221 if (drsc_cd.cd_devs[i]) 222 siop_dump(drsc_cd.cd_devs[i]); 223 } 224 #endif 225