afsc.c revision 1.18
1/* $NetBSD: afsc.c,v 1.18 1996/10/13 03:06:45 christos 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 <machine/cpu.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 54void afscattach __P((struct device *, struct device *, void *)); 55int afscmatch __P((struct device *, void *, void *)); 56int afsc_dmaintr __P((void *)); 57#ifdef DEBUG 58void afsc_dump __P((void)); 59#endif 60 61struct scsi_adapter afsc_scsiswitch = { 62 siop_scsicmd, 63 siop_minphys, 64 0, /* no lun support */ 65 0, /* no lun support */ 66}; 67 68struct scsi_device afsc_scsidev = { 69 NULL, /* use default error handler */ 70 NULL, /* do not have a start functio */ 71 NULL, /* have no async handler */ 72 NULL, /* Use default done routine */ 73}; 74 75 76#ifdef DEBUG 77#endif 78 79struct cfattach afsc_ca = { 80 sizeof(struct siop_softc), afscmatch, afscattach 81}; 82 83struct cfdriver afsc_cd = { 84 NULL, "afsc", DV_DULL, NULL, 0 85}; 86 87struct cfattach aftsc_ca = { 88 sizeof(struct siop_softc), afscmatch, afscattach 89}; 90 91struct cfdriver aftsc_cd = { 92 NULL, "aftsc", DV_DULL, NULL, 0 93}; 94 95/* 96 * if we are a Commodore Amiga A4091 or possibly an A4000T 97 */ 98int 99afscmatch(pdp, match, auxp) 100 struct device *pdp; 101 void *match, *auxp; 102{ 103 struct zbus_args *zap; 104 siop_regmap_p rp; 105 u_long temp, scratch; 106 107 zap = auxp; 108 if (zap->manid == 514 && zap->prodid == 84) 109 return(1); /* It's an A4091 SCSI card */ 110 if (!is_a4000() || !matchname(auxp, "afsc")) 111 return(0); /* Not on an A4000 or not A4000T SCSI */ 112 rp = ztwomap(0xdd0040); 113 if (badaddr((caddr_t)&rp->siop_scratch) || badaddr((caddr_t)&rp->siop_temp)) { 114 return(0); 115 } 116 scratch = rp->siop_scratch; 117 temp = rp->siop_temp; 118 rp->siop_scratch = 0xdeadbeef; 119 rp->siop_temp = 0xaaaa5555; 120 if (rp->siop_scratch != 0xdeadbeef || rp->siop_temp != 0xaaaa5555) 121 return(0); 122 rp->siop_scratch = scratch; 123 rp->siop_temp = temp; 124 if (rp->siop_scratch != scratch || rp->siop_temp != temp) 125 return(0); 126 return(1); 127} 128 129void 130afscattach(pdp, dp, auxp) 131 struct device *pdp, *dp; 132 void *auxp; 133{ 134 struct siop_softc *sc; 135 struct zbus_args *zap; 136 siop_regmap_p rp; 137 138 printf("\n"); 139 140 zap = auxp; 141 142 sc = (struct siop_softc *)dp; 143 if (zap->manid == 514 && zap->prodid == 84) 144 sc->sc_siopp = rp = zap->va + 0x00800000; 145 else 146 sc->sc_siopp = rp = ztwomap(0xdd0040); 147 148 /* 149 * CTEST7 = 80 [disable burst] 150 */ 151 sc->sc_clock_freq = 50; /* Clock = 50Mhz */ 152 sc->sc_ctest7 = SIOP_CTEST7_CDIS; 153 sc->sc_dcntl = SIOP_DCNTL_EA; 154 155 sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; 156 sc->sc_link.adapter_softc = sc; 157 sc->sc_link.adapter_target = 7; 158 sc->sc_link.adapter = &afsc_scsiswitch; 159 sc->sc_link.device = &afsc_scsidev; 160 sc->sc_link.openings = 2; 161 162 siopinitialize(sc); 163 164 sc->sc_isr.isr_intr = afsc_dmaintr; 165 sc->sc_isr.isr_arg = sc; 166 sc->sc_isr.isr_ipl = 2; 167 add_isr (&sc->sc_isr); 168 169 /* 170 * attach all scsi units on us 171 */ 172 config_found(dp, &sc->sc_link, scsiprint); 173} 174 175int 176afsc_dmaintr(arg) 177 void *arg; 178{ 179 struct siop_softc *sc = arg; 180 siop_regmap_p rp; 181 u_char istat; 182 183 if (sc->sc_flags & SIOP_INTSOFF) 184 return (0); /* interrupts are not active */ 185 rp = sc->sc_siopp; 186 istat = rp->siop_istat; 187 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 188 return(0); 189 /* 190 * save interrupt status, DMA status, and SCSI status 0 191 * (may need to deal with stacked interrupts?) 192 */ 193 sc->sc_sstat0 = rp->siop_sstat0; 194 sc->sc_istat = istat; 195 sc->sc_dstat = rp->siop_dstat; 196 siopintr(sc); 197 return(1); 198} 199 200#ifdef DEBUG 201void 202afsc_dump() 203{ 204 int i; 205 206 for (i = 0; i < afsc_cd.cd_ndevs; ++i) 207 if (afsc_cd.cd_devs[i]) 208 siop_dump(afsc_cd.cd_devs[i]); 209} 210#endif 211