mgnsc.c revision 1.13
1 /* $NetBSD: mgnsc.c,v 1.13 1995/08/18 15:28:01 chopps 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 <scsi/scsi_all.h> 44 #include <scsi/scsiconf.h> 45 #include <amiga/amiga/custom.h> 46 #include <amiga/amiga/cc.h> 47 #include <amiga/amiga/device.h> 48 #include <amiga/amiga/isr.h> 49 #include <amiga/dev/siopreg.h> 50 #include <amiga/dev/siopvar.h> 51 #include <amiga/dev/zbusvar.h> 52 53 int mgnscprint __P((void *auxp, char *)); 54 void mgnscattach __P((struct device *, struct device *, void *)); 55 int mgnscmatch __P((struct device *, struct cfdata *, void *)); 56 int siopintr __P((struct siop_softc *)); 57 int mgnsc_dmaintr __P((struct siop_softc *)); 58 59 struct scsi_adapter mgnsc_scsiswitch = { 60 siop_scsicmd, 61 siop_minphys, 62 0, /* no lun support */ 63 0, /* no lun support */ 64 }; 65 66 struct scsi_device mgnsc_scsidev = { 67 NULL, /* use default error handler */ 68 NULL, /* do not have a start functio */ 69 NULL, /* have no async handler */ 70 NULL, /* Use default done routine */ 71 }; 72 73 74 #ifdef DEBUG 75 #endif 76 77 struct cfdriver mgnsccd = { 78 NULL, "mgnsc", (cfmatch_t)mgnscmatch, mgnscattach, 79 DV_DULL, sizeof(struct siop_softc), NULL, 0 }; 80 81 /* 82 * if we are a CSA Magnum 40 SCSI 83 */ 84 int 85 mgnscmatch(pdp, cdp, auxp) 86 struct device *pdp; 87 struct cfdata *cdp; 88 void *auxp; 89 { 90 struct zbus_args *zap; 91 92 zap = auxp; 93 if (zap->manid == 1058 && zap->prodid == 17) 94 return(1); 95 return(0); 96 } 97 98 void 99 mgnscattach(pdp, dp, auxp) 100 struct device *pdp, *dp; 101 void *auxp; 102 { 103 struct siop_softc *sc; 104 struct zbus_args *zap; 105 siop_regmap_p rp; 106 107 printf("\n"); 108 zap = auxp; 109 110 sc = (struct siop_softc *)dp; 111 sc->sc_siopp = rp = zap->va + 0x8000; 112 113 /* 114 * DCNTL = 25.01->37.5MHZ / SCLK/1.5 115 * CTEST7 = TT1 116 */ 117 sc->sc_clock_freq = 0x0240; 118 119 alloc_sicallback(); 120 121 sc->sc_link.adapter_softc = sc; 122 sc->sc_link.adapter_target = 7; 123 sc->sc_link.adapter = &mgnsc_scsiswitch; 124 sc->sc_link.device = &mgnsc_scsidev; 125 sc->sc_link.openings = 2; 126 127 siopinitialize(sc); 128 129 sc->sc_isr.isr_intr = mgnsc_dmaintr; 130 sc->sc_isr.isr_arg = sc; 131 sc->sc_isr.isr_ipl = 6; 132 add_isr (&sc->sc_isr); 133 134 /* 135 * attach all scsi units on us 136 */ 137 config_found(dp, &sc->sc_link, mgnscprint); 138 } 139 140 /* 141 * print diag if pnp is NULL else just extra 142 */ 143 int 144 mgnscprint(auxp, pnp) 145 void *auxp; 146 char *pnp; 147 { 148 if (pnp == NULL) 149 return(UNCONF); 150 return(QUIET); 151 } 152 153 /* 154 * Level 6 interrupt processing for the Magnum/40 SCSI. Because the 155 * level 6 interrupt is above splbio, the interrupt status is saved 156 * and an sicallback to the level 2 interrupt handler scheduled. 157 * This way, the actual processing of the interrupt can be deferred 158 * until splbio is unblocked. 159 */ 160 161 int 162 mgnsc_dmaintr(sc) 163 struct siop_softc *sc; 164 { 165 siop_regmap_p rp; 166 u_char istat; 167 168 if (sc->sc_flags & SIOP_INTSOFF) 169 return (0); /* interrupts are not active */ 170 rp = sc->sc_siopp; 171 istat = rp->siop_istat; 172 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 173 return (0); 174 /* 175 * save interrupt status, DMA status, and SCSI status 0 176 * (may need to deal with stacked interrupts?) 177 */ 178 sc->sc_sstat0 = rp->siop_sstat0; 179 sc->sc_istat = istat; 180 sc->sc_dstat = rp->siop_dstat; 181 /* 182 * disable interrupts until the callback can process this 183 * interrupt. 184 */ 185 rp->siop_sien = 0; 186 rp->siop_dien = 0; 187 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 188 add_sicallback (siopintr, sc, NULL); 189 return (1); 190 } 191
Indexes created Tue Sep 23 14:10:03 GMT 2025