mgnsc.c revision 1.32
1 /* $NetBSD: mgnsc.c,v 1.32 2002/01/26 13:40:58 aymeric Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Michael L. Hitch 5 * Copyright (c) 1982, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)dma.c 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <dev/scsipi/scsi_all.h> 44 #include <dev/scsipi/scsipi_all.h> 45 #include <dev/scsipi/scsiconf.h> 46 #include <amiga/amiga/custom.h> 47 #include <amiga/amiga/cc.h> 48 #include <amiga/amiga/device.h> 49 #include <amiga/amiga/isr.h> 50 #include <amiga/dev/siopreg.h> 51 #include <amiga/dev/siopvar.h> 52 #include <amiga/dev/zbusvar.h> 53 54 void mgnscattach(struct device *, struct device *, void *); 55 int mgnscmatch(struct device *, struct cfdata *, void *); 56 int mgnsc_dmaintr(void *); 57 #ifdef DEBUG 58 void mgnsc_dump(void); 59 #endif 60 61 62 #ifdef DEBUG 63 #endif 64 65 struct cfattach mgnsc_ca = { 66 sizeof(struct siop_softc), mgnscmatch, mgnscattach 67 }; 68 69 /* 70 * if we are a CSA Magnum 40 SCSI 71 */ 72 int 73 mgnscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 74 { 75 struct zbus_args *zap; 76 77 zap = auxp; 78 if (zap->manid == 1058 && zap->prodid == 17) 79 return(1); 80 return(0); 81 } 82 83 void 84 mgnscattach(struct device *pdp, struct device *dp, void *auxp) 85 { 86 struct siop_softc *sc = (struct siop_softc *)dp; 87 struct zbus_args *zap; 88 siop_regmap_p rp; 89 struct scsipi_adapter *adapt = &sc->sc_adapter; 90 struct scsipi_channel *chan = &sc->sc_channel; 91 92 printf("\n"); 93 zap = auxp; 94 95 sc->sc_siopp = rp = (siop_regmap_p)((caddr_t)zap->va + 0x8000); 96 97 /* 98 * CTEST7 = TT1 99 */ 100 sc->sc_clock_freq = 33; /* Clock = 33Mhz */ 101 sc->sc_ctest7 = SIOP_CTEST7_TT1; 102 sc->sc_dcntl = 0x00; 103 104 alloc_sicallback(); 105 106 /* 107 * Fill in the scsipi_adapter. 108 */ 109 memset(adapt, 0, sizeof(*adapt)); 110 adapt->adapt_dev = &sc->sc_dev; 111 adapt->adapt_nchannels = 1; 112 adapt->adapt_openings = 7; 113 adapt->adapt_max_periph = 1; 114 adapt->adapt_request = siop_scsipi_request; 115 adapt->adapt_minphys = siop_minphys; 116 117 /* 118 * Fill in the scsipi_channel. 119 */ 120 memset(chan, 0, sizeof(*chan)); 121 chan->chan_adapter = adapt; 122 chan->chan_bustype = &scsi_bustype; 123 chan->chan_channel = 0; 124 chan->chan_ntargets = 8; 125 chan->chan_nluns = 8; 126 chan->chan_id = 7; 127 128 siopinitialize(sc); 129 130 sc->sc_isr.isr_intr = mgnsc_dmaintr; 131 sc->sc_isr.isr_arg = sc; 132 sc->sc_isr.isr_ipl = 6; 133 add_isr (&sc->sc_isr); 134 135 /* 136 * attach all scsi units on us 137 */ 138 config_found(dp, chan, scsiprint); 139 } 140 141 /* 142 * Level 6 interrupt processing for the Magnum/40 SCSI. Because the 143 * level 6 interrupt is above splbio, the interrupt status is saved 144 * and an sicallback to the level 2 interrupt handler scheduled. 145 * This way, the actual processing of the interrupt can be deferred 146 * until splbio is unblocked. 147 */ 148 149 int 150 mgnsc_dmaintr(void *arg) 151 { 152 struct siop_softc *sc = arg; 153 siop_regmap_p rp; 154 u_char istat; 155 156 if (sc->sc_flags & SIOP_INTSOFF) 157 return (0); /* interrupts are not active */ 158 rp = sc->sc_siopp; 159 istat = rp->siop_istat; 160 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 161 return (0); 162 /* 163 * save interrupt status, DMA status, and SCSI status 0 164 * (may need to deal with stacked interrupts?) 165 */ 166 sc->sc_sstat0 = rp->siop_sstat0; 167 sc->sc_istat = istat; 168 sc->sc_dstat = rp->siop_dstat; 169 /* 170 * disable interrupts until the callback can process this 171 * interrupt. 172 */ 173 rp->siop_sien = 0; 174 rp->siop_dien = 0; 175 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 176 add_sicallback((sifunc_t)siopintr, sc, NULL); 177 return (1); 178 } 179 180 #ifdef DEBUG 181 void 182 mgnsc_dump(void) 183 { 184 extern struct cfdriver mgnsc_cd; 185 int i; 186 187 for (i = 0; i < mgnsc_cd.cd_ndevs; ++i) 188 if (mgnsc_cd.cd_devs[i]) 189 siop_dump(mgnsc_cd.cd_devs[i]); 190 } 191 #endif 192
Indexes created Wed Sep 24 05:09:52 GMT 2025