1 /* $NetBSD: drsc.c,v 1.22 2002/10/02 04:55:49 thorpej 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/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: drsc.c,v 1.22 2002/10/02 04:55:49 thorpej Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 #include <dev/scsipi/scsi_all.h> 48 #include <dev/scsipi/scsipi_all.h> 49 #include <dev/scsipi/scsiconf.h> 50 #include <amiga/amiga/custom.h> 51 #include <amiga/amiga/cc.h> 52 #include <amiga/amiga/device.h> 53 #include <amiga/amiga/isr.h> 54 #include <amiga/dev/siopreg.h> 55 #include <amiga/dev/siopvar.h> 56 #include <amiga/amiga/drcustom.h> 57 58 #include <machine/cpu.h> /* is_xxx(), */ 59 60 void drscattach(struct device *, struct device *, void *); 61 int drscmatch(struct device *, struct cfdata *, void *); 62 int drsc_dmaintr(struct siop_softc *); 63 #ifdef DEBUG 64 void drsc_dump(void); 65 #endif 66 67 #ifdef DEBUG 68 #endif 69 70 CFATTACH_DECL(drsc, sizeof(struct siop_softc), 71 drscmatch, drscattach, NULL, NULL); 72 73 static struct siop_softc *drsc_softc; 74 75 /* 76 * One of us is on every DraCo motherboard, 77 */ 78 int 79 drscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 80 { 81 static int drsc_matched = 0; 82 83 /* Allow only one instance. */ 84 if (!is_draco() || !matchname(auxp, "drsc") || drsc_matched) 85 return (0); 86 87 drsc_matched = 1; 88 return(1); 89 } 90 91 void 92 drscattach(struct device *pdp, struct device *dp, void *auxp) 93 { 94 struct siop_softc *sc = (struct siop_softc *)dp; 95 struct zbus_args *zap; 96 siop_regmap_p rp; 97 struct scsipi_adapter *adapt = &sc->sc_adapter; 98 struct scsipi_channel *chan = &sc->sc_channel; 99 100 printf("\n"); 101 102 zap = auxp; 103 104 sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+NBPG*DRSCSIPG); 105 106 /* 107 * CTEST7 = TT1 108 */ 109 sc->sc_clock_freq = 50; /* Clock = 50MHz */ 110 sc->sc_ctest7 = 0x02; 111 112 alloc_sicallback(); 113 114 /* 115 * Fill in the scsipi_adapter. 116 */ 117 memset(adapt, 0, sizeof(*adapt)); 118 adapt->adapt_dev = &sc->sc_dev; 119 adapt->adapt_nchannels = 1; 120 adapt->adapt_openings = 7; 121 adapt->adapt_max_periph = 1; 122 adapt->adapt_request = siop_scsipi_request; 123 adapt->adapt_minphys = siop_minphys; 124 125 /* 126 * Fill in the scsipi_channel. 127 */ 128 memset(chan, 0, sizeof(*chan)); 129 chan->chan_adapter = adapt; 130 chan->chan_bustype = &scsi_bustype; 131 chan->chan_channel = 0; 132 chan->chan_ntargets = 8; 133 chan->chan_nluns = 8; 134 chan->chan_id = 7; 135 136 siopinitialize(sc); 137 138 #if 0 139 sc->sc_isr.isr_intr = drsc_dmaintr; 140 sc->sc_isr.isr_arg = sc; 141 sc->sc_isr.isr_ipl = 4; 142 add_isr(&sc->sc_isr); 143 #else 144 drsc_softc = sc; 145 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 146 single_inst_bset_b(*draco_intena, DRIRQ_SCSI); 147 #endif 148 /* 149 * attach all scsi units on us 150 */ 151 config_found(dp, chan, scsiprint); 152 } 153 154 /* 155 * Level 4 interrupt processing for the MacroSystem DraCo mainboard 156 * SCSI. Because the level 4 interrupt is above splbio, the 157 * interrupt status is saved and an sicallback to the level 2 interrupt 158 * handler scheduled. This way, the actual processing of the interrupt 159 * can be deferred until splbio is unblocked. 160 */ 161 162 void 163 drsc_handler(void) 164 { 165 struct siop_softc *sc = drsc_softc; 166 167 siop_regmap_p rp; 168 int istat; 169 170 if (sc->sc_flags & SIOP_INTSOFF) 171 return; /* interrupts are not active */ 172 173 rp = sc->sc_siopp; 174 istat = rp->siop_istat; 175 176 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 177 return; 178 179 /* 180 * save interrupt status, DMA status, and SCSI status 0 181 * (may need to deal with stacked interrupts?) 182 */ 183 sc->sc_sstat0 = rp->siop_sstat0; 184 sc->sc_istat = istat; 185 sc->sc_dstat = rp->siop_dstat; 186 /* 187 * disable interrupts until the callback can process this 188 * interrupt. 189 */ 190 #ifdef DRSC_NOCALLBACK 191 (void)spl1(); 192 siopintr(sc); 193 #else 194 rp->siop_sien = 0; 195 rp->siop_dien = 0; 196 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 197 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 198 #ifdef DEBUG 199 if (*draco_intpen & DRIRQ_SCSI) 200 printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname, 201 *draco_intpen); 202 #endif 203 add_sicallback((sifunc_t)siopintr, sc, NULL); 204 #endif 205 return; 206 } 207 208 #ifdef DEBUG 209 void 210 drsc_dump(void) 211 { 212 extern struct cfdriver drsc_cd; 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