1 /* $NetBSD: mgnsc.c,v 1.33 2002/01/28 09:57:01 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/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: mgnsc.c,v 1.33 2002/01/28 09:57:01 aymeric 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 struct cfattach mgnsc_ca = { 69 sizeof(struct siop_softc), mgnscmatch, mgnscattach 70 }; 71 72 /* 73 * if we are a CSA Magnum 40 SCSI 74 */ 75 int 76 mgnscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 77 { 78 struct zbus_args *zap; 79 80 zap = auxp; 81 if (zap->manid == 1058 && zap->prodid == 17) 82 return(1); 83 return(0); 84 } 85 86 void 87 mgnscattach(struct device *pdp, struct device *dp, void *auxp) 88 { 89 struct siop_softc *sc = (struct siop_softc *)dp; 90 struct zbus_args *zap; 91 siop_regmap_p rp; 92 struct scsipi_adapter *adapt = &sc->sc_adapter; 93 struct scsipi_channel *chan = &sc->sc_channel; 94 95 printf("\n"); 96 zap = auxp; 97 98 sc->sc_siopp = rp = (siop_regmap_p)((caddr_t)zap->va + 0x8000); 99 100 /* 101 * CTEST7 = TT1 102 */ 103 sc->sc_clock_freq = 33; /* Clock = 33Mhz */ 104 sc->sc_ctest7 = SIOP_CTEST7_TT1; 105 sc->sc_dcntl = 0x00; 106 107 alloc_sicallback(); 108 109 /* 110 * Fill in the scsipi_adapter. 111 */ 112 memset(adapt, 0, sizeof(*adapt)); 113 adapt->adapt_dev = &sc->sc_dev; 114 adapt->adapt_nchannels = 1; 115 adapt->adapt_openings = 7; 116 adapt->adapt_max_periph = 1; 117 adapt->adapt_request = siop_scsipi_request; 118 adapt->adapt_minphys = siop_minphys; 119 120 /* 121 * Fill in the scsipi_channel. 122 */ 123 memset(chan, 0, sizeof(*chan)); 124 chan->chan_adapter = adapt; 125 chan->chan_bustype = &scsi_bustype; 126 chan->chan_channel = 0; 127 chan->chan_ntargets = 8; 128 chan->chan_nluns = 8; 129 chan->chan_id = 7; 130 131 siopinitialize(sc); 132 133 sc->sc_isr.isr_intr = mgnsc_dmaintr; 134 sc->sc_isr.isr_arg = sc; 135 sc->sc_isr.isr_ipl = 6; 136 add_isr (&sc->sc_isr); 137 138 /* 139 * attach all scsi units on us 140 */ 141 config_found(dp, chan, scsiprint); 142 } 143 144 /* 145 * Level 6 interrupt processing for the Magnum/40 SCSI. Because the 146 * level 6 interrupt is above splbio, the interrupt status is saved 147 * and an sicallback to the level 2 interrupt handler scheduled. 148 * This way, the actual processing of the interrupt can be deferred 149 * until splbio is unblocked. 150 */ 151 152 int 153 mgnsc_dmaintr(void *arg) 154 { 155 struct siop_softc *sc = arg; 156 siop_regmap_p rp; 157 u_char istat; 158 159 if (sc->sc_flags & SIOP_INTSOFF) 160 return (0); /* interrupts are not active */ 161 rp = sc->sc_siopp; 162 istat = rp->siop_istat; 163 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 164 return (0); 165 /* 166 * save interrupt status, DMA status, and SCSI status 0 167 * (may need to deal with stacked interrupts?) 168 */ 169 sc->sc_sstat0 = rp->siop_sstat0; 170 sc->sc_istat = istat; 171 sc->sc_dstat = rp->siop_dstat; 172 /* 173 * disable interrupts until the callback can process this 174 * interrupt. 175 */ 176 rp->siop_sien = 0; 177 rp->siop_dien = 0; 178 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 179 add_sicallback((sifunc_t)siopintr, sc, NULL); 180 return (1); 181 } 182 183 #ifdef DEBUG 184 void 185 mgnsc_dump(void) 186 { 187 extern struct cfdriver mgnsc_cd; 188 int i; 189 190 for (i = 0; i < mgnsc_cd.cd_ndevs; ++i) 191 if (mgnsc_cd.cd_devs[i]) 192 siop_dump(mgnsc_cd.cd_devs[i]); 193 } 194 #endif 195