1 /* $NetBSD: zssc.c,v 1.20 1996/10/13 03:07:38 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 <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 void zsscattach __P((struct device *, struct device *, void *)); 54 int zsscmatch __P((struct device *, void *, void *)); 55 int zssc_dmaintr __P((void *)); 56 #ifdef DEBUG 57 void zssc_dump __P((void)); 58 #endif 59 60 struct scsi_adapter zssc_scsiswitch = { 61 siop_scsicmd, 62 siop_minphys, 63 0, /* no lun support */ 64 0, /* no lun support */ 65 }; 66 67 struct scsi_device zssc_scsidev = { 68 NULL, /* use default error handler */ 69 NULL, /* do not have a start functio */ 70 NULL, /* have no async handler */ 71 NULL, /* Use default done routine */ 72 }; 73 74 75 #ifdef DEBUG 76 #endif 77 78 struct cfattach zssc_ca = { 79 sizeof(struct siop_softc), zsscmatch, zsscattach 80 }; 81 82 struct cfdriver zssc_cd = { 83 NULL, "zssc", DV_DULL, NULL, 0 84 }; 85 86 /* 87 * if we are an PPI Zeus 88 */ 89 int 90 zsscmatch(pdp, match, auxp) 91 struct device *pdp; 92 void *match, *auxp; 93 { 94 struct zbus_args *zap; 95 96 zap = auxp; 97 if (zap->manid == 2026 && zap->prodid == 150) 98 return(1); 99 return(0); 100 } 101 102 void 103 zsscattach(pdp, dp, auxp) 104 struct device *pdp, *dp; 105 void *auxp; 106 { 107 struct siop_softc *sc; 108 struct zbus_args *zap; 109 siop_regmap_p rp; 110 111 printf("\n"); 112 113 zap = auxp; 114 115 sc = (struct siop_softc *)dp; 116 sc->sc_siopp = rp = zap->va + 0x4000; 117 118 /* 119 * CTEST7 = 00 120 */ 121 sc->sc_clock_freq = 66; /* Clock = 66Mhz */ 122 sc->sc_ctest7 = 0x00; 123 sc->sc_dcntl = 0x00; 124 125 alloc_sicallback(); 126 127 sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; 128 sc->sc_link.adapter_softc = sc; 129 sc->sc_link.adapter_target = 7; 130 sc->sc_link.adapter = &zssc_scsiswitch; 131 sc->sc_link.device = &zssc_scsidev; 132 sc->sc_link.openings = 2; 133 134 siopinitialize(sc); 135 136 sc->sc_isr.isr_intr = zssc_dmaintr; 137 sc->sc_isr.isr_arg = sc; 138 sc->sc_isr.isr_ipl = 6; 139 add_isr(&sc->sc_isr); 140 141 /* 142 * attach all scsi units on us 143 */ 144 config_found(dp, &sc->sc_link, scsiprint); 145 } 146 147 /* 148 * Level 6 interrupt processing for the Progressive Peripherals Inc 149 * Zeus SCSI. Because the level 6 interrupt is above splbio, the 150 * interrupt status is saved and an sicallback to the level 2 interrupt 151 * handler scheduled. This way, the actual processing of the interrupt 152 * can be deferred until splbio is unblocked. 153 */ 154 155 int 156 zssc_dmaintr(arg) 157 void *arg; 158 { 159 struct siop_softc *sc = arg; 160 siop_regmap_p rp; 161 int istat; 162 163 if (sc->sc_flags & SIOP_INTSOFF) 164 return (0); /* interrupts are not active */ 165 rp = sc->sc_siopp; 166 istat = rp->siop_istat; 167 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 168 return(0); 169 /* 170 * save interrupt status, DMA status, and SCSI status 0 171 * (may need to deal with stacked interrupts?) 172 */ 173 sc->sc_sstat0 = rp->siop_sstat0; 174 sc->sc_istat = istat; 175 sc->sc_dstat = rp->siop_dstat; 176 /* 177 * disable interrupts until the callback can process this 178 * interrupt. 179 */ 180 rp->siop_sien = 0; 181 rp->siop_dien = 0; 182 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 183 add_sicallback((sifunc_t)siopintr, sc, NULL); 184 return(1); 185 } 186 187 #ifdef DEBUG 188 void 189 zssc_dump() 190 { 191 int i; 192 193 for (i = 0; i < zssc_cd.cd_ndevs; ++i) 194 if (zssc_cd.cd_devs[i]) 195 siop_dump(zssc_cd.cd_devs[i]); 196 } 197 #endif 198