1 /* $NetBSD: mgnsc.c,v 1.35 2002/10/02 04:55:52 thorpej 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/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: mgnsc.c,v 1.35 2002/10/02 04:55:52 thorpej Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 #include <dev/scsipi/scsi_all.h> 47 #include <dev/scsipi/scsipi_all.h> 48 #include <dev/scsipi/scsiconf.h> 49 #include <amiga/amiga/custom.h> 50 #include <amiga/amiga/cc.h> 51 #include <amiga/amiga/device.h> 52 #include <amiga/amiga/isr.h> 53 #include <amiga/dev/siopreg.h> 54 #include <amiga/dev/siopvar.h> 55 #include <amiga/dev/zbusvar.h> 56 57 void mgnscattach(struct device *, struct device *, void *); 58 int mgnscmatch(struct device *, struct cfdata *, void *); 59 int mgnsc_dmaintr(void *); 60 #ifdef DEBUG 61 void mgnsc_dump(void); 62 #endif 63 64 65 #ifdef DEBUG 66 #endif 67 68 CFATTACH_DECL(mgnsc, sizeof(struct siop_softc), 69 mgnscmatch, mgnscattach, NULL, NULL); 70 71 /* 72 * if we are a CSA Magnum 40 SCSI 73 */ 74 int 75 mgnscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 76 { 77 struct zbus_args *zap; 78 79 zap = auxp; 80 if (zap->manid == 1058 && zap->prodid == 17) 81 return(1); 82 return(0); 83 } 84 85 void 86 mgnscattach(struct device *pdp, struct device *dp, void *auxp) 87 { 88 struct siop_softc *sc = (struct siop_softc *)dp; 89 struct zbus_args *zap; 90 siop_regmap_p rp; 91 struct scsipi_adapter *adapt = &sc->sc_adapter; 92 struct scsipi_channel *chan = &sc->sc_channel; 93 94 printf("\n"); 95 zap = auxp; 96 97 sc->sc_siopp = rp = (siop_regmap_p)((caddr_t)zap->va + 0x8000); 98 99 /* 100 * CTEST7 = TT1 101 */ 102 sc->sc_clock_freq = 33; /* Clock = 33Mhz */ 103 sc->sc_ctest7 = SIOP_CTEST7_TT1; 104 sc->sc_dcntl = 0x00; 105 106 alloc_sicallback(); 107 108 /* 109 * Fill in the scsipi_adapter. 110 */ 111 memset(adapt, 0, sizeof(*adapt)); 112 adapt->adapt_dev = &sc->sc_dev; 113 adapt->adapt_nchannels = 1; 114 adapt->adapt_openings = 7; 115 adapt->adapt_max_periph = 1; 116 adapt->adapt_request = siop_scsipi_request; 117 adapt->adapt_minphys = siop_minphys; 118 119 /* 120 * Fill in the scsipi_channel. 121 */ 122 memset(chan, 0, sizeof(*chan)); 123 chan->chan_adapter = adapt; 124 chan->chan_bustype = &scsi_bustype; 125 chan->chan_channel = 0; 126 chan->chan_ntargets = 8; 127 chan->chan_nluns = 8; 128 chan->chan_id = 7; 129 130 siopinitialize(sc); 131 132 sc->sc_isr.isr_intr = mgnsc_dmaintr; 133 sc->sc_isr.isr_arg = sc; 134 sc->sc_isr.isr_ipl = 6; 135 add_isr (&sc->sc_isr); 136 137 /* 138 * attach all scsi units on us 139 */ 140 config_found(dp, chan, scsiprint); 141 } 142 143 /* 144 * Level 6 interrupt processing for the Magnum/40 SCSI. Because the 145 * level 6 interrupt is above splbio, the interrupt status is saved 146 * and an sicallback to the level 2 interrupt handler scheduled. 147 * This way, the actual processing of the interrupt can be deferred 148 * until splbio is unblocked. 149 */ 150 151 int 152 mgnsc_dmaintr(void *arg) 153 { 154 struct siop_softc *sc = arg; 155 siop_regmap_p rp; 156 u_char istat; 157 158 if (sc->sc_flags & SIOP_INTSOFF) 159 return (0); /* interrupts are not active */ 160 rp = sc->sc_siopp; 161 istat = rp->siop_istat; 162 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 163 return (0); 164 /* 165 * save interrupt status, DMA status, and SCSI status 0 166 * (may need to deal with stacked interrupts?) 167 */ 168 sc->sc_sstat0 = rp->siop_sstat0; 169 sc->sc_istat = istat; 170 sc->sc_dstat = rp->siop_dstat; 171 /* 172 * disable interrupts until the callback can process this 173 * interrupt. 174 */ 175 rp->siop_sien = 0; 176 rp->siop_dien = 0; 177 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 178 add_sicallback((sifunc_t)siopintr, sc, NULL); 179 return (1); 180 } 181 182 #ifdef DEBUG 183 void 184 mgnsc_dump(void) 185 { 186 extern struct cfdriver mgnsc_cd; 187 int i; 188 189 for (i = 0; i < mgnsc_cd.cd_ndevs; ++i) 190 if (mgnsc_cd.cd_devs[i]) 191 siop_dump(mgnsc_cd.cd_devs[i]); 192 } 193 #endif 194