1 /* $NetBSD: afsc.c,v 1.20 1996/12/23 09:09:49 veego 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 54 void afscattach __P((struct device *, struct device *, void *)); 55 int afscmatch __P((struct device *, struct cfdata *, void *)); 56 int afsc_dmaintr __P((void *)); 57 #ifdef DEBUG 58 void afsc_dump __P((void)); 59 #endif 60 61 struct scsi_adapter afsc_scsiswitch = { 62 siop_scsicmd, 63 siop_minphys, 64 0, /* no lun support */ 65 0, /* no lun support */ 66 }; 67 68 struct 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 79 struct cfattach afsc_ca = { 80 sizeof(struct siop_softc), afscmatch, afscattach 81 }; 82 83 struct cfdriver afsc_cd = { 84 NULL, "afsc", DV_DULL, NULL, 0 85 }; 86 87 struct cfattach aftsc_ca = { 88 sizeof(struct siop_softc), afscmatch, afscattach 89 }; 90 91 struct 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 */ 98 int 99 afscmatch(pdp, cfp, auxp) 100 struct device *pdp; 101 struct cfdata *cfp; 102 void *auxp; 103 { 104 struct zbus_args *zap; 105 siop_regmap_p rp; 106 u_long temp, scratch; 107 108 zap = auxp; 109 if (zap->manid == 514 && zap->prodid == 84) 110 return(1); /* It's an A4091 SCSI card */ 111 if (!is_a4000() || !matchname(auxp, "afsc")) 112 return(0); /* Not on an A4000 or not A4000T SCSI */ 113 rp = ztwomap(0xdd0040); 114 if (badaddr((caddr_t)&rp->siop_scratch) || badaddr((caddr_t)&rp->siop_temp)) { 115 return(0); 116 } 117 scratch = rp->siop_scratch; 118 temp = rp->siop_temp; 119 rp->siop_scratch = 0xdeadbeef; 120 rp->siop_temp = 0xaaaa5555; 121 if (rp->siop_scratch != 0xdeadbeef || rp->siop_temp != 0xaaaa5555) 122 return(0); 123 rp->siop_scratch = scratch; 124 rp->siop_temp = temp; 125 if (rp->siop_scratch != scratch || rp->siop_temp != temp) 126 return(0); 127 return(1); 128 } 129 130 void 131 afscattach(pdp, dp, auxp) 132 struct device *pdp, *dp; 133 void *auxp; 134 { 135 struct siop_softc *sc; 136 struct zbus_args *zap; 137 siop_regmap_p rp; 138 139 printf("\n"); 140 141 zap = auxp; 142 143 sc = (struct siop_softc *)dp; 144 if (zap->manid == 514 && zap->prodid == 84) 145 sc->sc_siopp = rp = zap->va + 0x00800000; 146 else 147 sc->sc_siopp = rp = ztwomap(0xdd0040); 148 149 /* 150 * CTEST7 = 80 [disable burst] 151 */ 152 sc->sc_clock_freq = 50; /* Clock = 50Mhz */ 153 sc->sc_ctest7 = SIOP_CTEST7_CDIS; 154 sc->sc_dcntl = SIOP_DCNTL_EA; 155 156 sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; 157 sc->sc_link.adapter_softc = sc; 158 sc->sc_link.adapter_target = 7; 159 sc->sc_link.adapter = &afsc_scsiswitch; 160 sc->sc_link.device = &afsc_scsidev; 161 sc->sc_link.openings = 2; 162 sc->sc_link.max_target = 7; 163 164 siopinitialize(sc); 165 166 sc->sc_isr.isr_intr = afsc_dmaintr; 167 sc->sc_isr.isr_arg = sc; 168 sc->sc_isr.isr_ipl = 2; 169 add_isr (&sc->sc_isr); 170 171 /* 172 * attach all scsi units on us 173 */ 174 config_found(dp, &sc->sc_link, scsiprint); 175 } 176 177 int 178 afsc_dmaintr(arg) 179 void *arg; 180 { 181 struct siop_softc *sc = arg; 182 siop_regmap_p rp; 183 u_char istat; 184 185 if (sc->sc_flags & SIOP_INTSOFF) 186 return (0); /* interrupts are not active */ 187 rp = sc->sc_siopp; 188 istat = rp->siop_istat; 189 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 190 return(0); 191 /* 192 * save interrupt status, DMA status, and SCSI status 0 193 * (may need to deal with stacked interrupts?) 194 */ 195 sc->sc_sstat0 = rp->siop_sstat0; 196 sc->sc_istat = istat; 197 sc->sc_dstat = rp->siop_dstat; 198 siopintr(sc); 199 return(1); 200 } 201 202 #ifdef DEBUG 203 void 204 afsc_dump() 205 { 206 int i; 207 208 for (i = 0; i < afsc_cd.cd_ndevs; ++i) 209 if (afsc_cd.cd_devs[i]) 210 siop_dump(afsc_cd.cd_devs[i]); 211 } 212 #endif 213