1 /* $NetBSD: mgnsc.c,v 1.48 2021/08/07 16:18:41 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)dma.c 32 */ 33 34 /* 35 * Copyright (c) 1994 Michael L. Hitch 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 49 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 50 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 51 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 52 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 53 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 54 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 55 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 56 * 57 * @(#)dma.c 58 */ 59 60 #include <sys/cdefs.h> 61 __KERNEL_RCSID(0, "$NetBSD: mgnsc.c,v 1.48 2021/08/07 16:18:41 thorpej Exp $"); 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #include <sys/device.h> 67 68 #include <dev/scsipi/scsi_all.h> 69 #include <dev/scsipi/scsipi_all.h> 70 #include <dev/scsipi/scsiconf.h> 71 #include <amiga/amiga/custom.h> 72 #include <amiga/amiga/cc.h> 73 #include <amiga/amiga/device.h> 74 #include <amiga/amiga/isr.h> 75 #include <amiga/dev/siopreg.h> 76 #include <amiga/dev/siopvar.h> 77 #include <amiga/dev/zbusvar.h> 78 79 void mgnscattach(device_t, device_t, void *); 80 int mgnscmatch(device_t, cfdata_t, void *); 81 int mgnsc_dmaintr(void *); 82 #ifdef DEBUG 83 void mgnsc_dump(void); 84 #endif 85 86 87 #ifdef DEBUG 88 #endif 89 90 CFATTACH_DECL_NEW(mgnsc, sizeof(struct siop_softc), 91 mgnscmatch, mgnscattach, NULL, NULL); 92 93 /* 94 * if we are a CSA Magnum 40 SCSI 95 */ 96 int 97 mgnscmatch(device_t parent, cfdata_t cf, void *aux) 98 { 99 struct zbus_args *zap; 100 101 zap = aux; 102 if (zap->manid == 1058 && zap->prodid == 17) 103 return(1); 104 return(0); 105 } 106 107 void 108 mgnscattach(device_t parent, device_t self, void *aux) 109 { 110 struct siop_softc *sc = device_private(self); 111 struct zbus_args *zap; 112 siop_regmap_p rp; 113 struct scsipi_adapter *adapt = &sc->sc_adapter; 114 struct scsipi_channel *chan = &sc->sc_channel; 115 116 sc->sc_dev = self; 117 118 printf("\n"); 119 zap = aux; 120 121 sc->sc_siopp = rp = (siop_regmap_p)((char *)zap->va + 0x8000); 122 123 /* 124 * CTEST7 = TT1 125 */ 126 sc->sc_clock_freq = 33; /* Clock = 33 MHz */ 127 sc->sc_ctest7 = SIOP_CTEST7_TT1; 128 sc->sc_dcntl = 0x00; 129 130 sc->sc_siop_si = softint_establish(SOFTINT_BIO, 131 (void (*)(void *))siopintr, sc); 132 133 /* 134 * Fill in the scsipi_adapter. 135 */ 136 memset(adapt, 0, sizeof(*adapt)); 137 adapt->adapt_dev = self; 138 adapt->adapt_nchannels = 1; 139 adapt->adapt_openings = 7; 140 adapt->adapt_max_periph = 1; 141 adapt->adapt_request = siop_scsipi_request; 142 adapt->adapt_minphys = siop_minphys; 143 144 /* 145 * Fill in the scsipi_channel. 146 */ 147 memset(chan, 0, sizeof(*chan)); 148 chan->chan_adapter = adapt; 149 chan->chan_bustype = &scsi_bustype; 150 chan->chan_channel = 0; 151 chan->chan_ntargets = 8; 152 chan->chan_nluns = 8; 153 chan->chan_id = 7; 154 155 siopinitialize(sc); 156 157 sc->sc_isr.isr_intr = mgnsc_dmaintr; 158 sc->sc_isr.isr_arg = sc; 159 sc->sc_isr.isr_ipl = 6; 160 add_isr (&sc->sc_isr); 161 162 /* 163 * attach all scsi units on us 164 */ 165 config_found(self, chan, scsiprint, CFARGS_NONE); 166 } 167 168 /* 169 * Level 6 interrupt processing for the Magnum/40 SCSI. Because the 170 * level 6 interrupt is above splbio, the interrupt status is saved 171 * and a softint scheduled. This way, the actual processing of the 172 * interrupt can be deferred until splbio is unblocked. 173 */ 174 175 int 176 mgnsc_dmaintr(void *arg) 177 { 178 struct siop_softc *sc = arg; 179 siop_regmap_p rp; 180 u_char istat; 181 182 if (sc->sc_flags & SIOP_INTSOFF) 183 return (0); /* interrupts are not active */ 184 rp = sc->sc_siopp; 185 istat = rp->siop_istat; 186 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 187 return (0); 188 /* 189 * save interrupt status, DMA status, and SCSI status 0 190 * (may need to deal with stacked interrupts?) 191 */ 192 sc->sc_sstat0 = rp->siop_sstat0; 193 sc->sc_istat = istat; 194 sc->sc_dstat = rp->siop_dstat; 195 /* 196 * disable interrupts until the callback can process this 197 * interrupt. 198 */ 199 rp->siop_sien = 0; 200 rp->siop_dien = 0; 201 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 202 softint_schedule(sc->sc_siop_si); 203 return (1); 204 } 205 206 #ifdef DEBUG 207 void 208 mgnsc_dump(void) 209 { 210 extern struct cfdriver mgnsc_cd; 211 struct siop_softc *sc; 212 int i; 213 214 for (i = 0; i < mgnsc_cd.cd_ndevs; ++i) { 215 sc = device_lookup_private(&mgnsc_cd, i); 216 if (sc != NULL) 217 siop_dump(sc); 218 } 219 } 220 #endif 221
Indexes created Sat Sep 20 22:09:52 GMT 2025