zssc.c revision 1.11
1 /* $NetBSD: zssc.c,v 1.11 1995/08/18 15:28:20 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 zsscprint __P((void *auxp, char *)); 54 void zsscattach __P((struct device *, struct device *, void *)); 55 int zsscmatch __P((struct device *, struct cfdata *, void *)); 56 int siopintr __P((struct siop_softc *)); 57 int zssc_dmaintr __P((struct siop_softc *)); 58 59 struct scsi_adapter zssc_scsiswitch = { 60 siop_scsicmd, 61 siop_minphys, 62 0, /* no lun support */ 63 0, /* no lun support */ 64 }; 65 66 struct scsi_device zssc_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 zssccd = { 78 NULL, "zssc", (cfmatch_t)zsscmatch, zsscattach, 79 DV_DULL, sizeof(struct siop_softc), NULL, 0 }; 80 81 /* 82 * if we are an PPI Zeus 83 */ 84 int 85 zsscmatch(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 == 2026 && zap->prodid == 150) 94 return(1); 95 return(0); 96 } 97 98 void 99 zsscattach(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"); 108 109 zap = auxp; 110 111 sc = (struct siop_softc *)dp; 112 sc->sc_siopp = rp = zap->va + 0x4000; 113 114 /* 115 * DCNTL = 50.01->66MHZ / SCLK/3 116 * CTEST7 = 00 117 */ 118 sc->sc_clock_freq = 0xc0; 119 120 alloc_sicallback(); 121 122 sc->sc_link.adapter_softc = sc; 123 sc->sc_link.adapter_target = 7; 124 sc->sc_link.adapter = &zssc_scsiswitch; 125 sc->sc_link.device = &zssc_scsidev; 126 sc->sc_link.openings = 2; 127 128 siopinitialize(sc); 129 130 sc->sc_isr.isr_intr = zssc_dmaintr; 131 sc->sc_isr.isr_arg = sc; 132 sc->sc_isr.isr_ipl = 6; 133 add_isr(&sc->sc_isr); 134 135 /* 136 * attach all scsi units on us 137 */ 138 config_found(dp, &sc->sc_link, zsscprint); 139 } 140 141 /* 142 * print diag if pnp is NULL else just extra 143 */ 144 int 145 zsscprint(auxp, pnp) 146 void *auxp; 147 char *pnp; 148 { 149 if (pnp == NULL) 150 return(UNCONF); 151 return(QUIET); 152 } 153 154 155 /* 156 * Level 6 interrupt processing for the Progressive Peripherals Inc 157 * Zeus SCSI. Because the level 6 interrupt is above splbio, the 158 * interrupt status is saved and an sicallback to the level 2 interrupt 159 * handler scheduled. This way, the actual processing of the interrupt 160 * can be deferred until splbio is unblocked. 161 */ 162 163 int 164 zssc_dmaintr(sc) 165 struct siop_softc *sc; 166 { 167 siop_regmap_p rp; 168 int istat; 169 170 if (sc->sc_flags & SIOP_INTSOFF) 171 return (0); /* interrupts are not active */ 172 rp = sc->sc_siopp; 173 istat = rp->siop_istat; 174 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 175 return(0); 176 /* 177 * save interrupt status, DMA status, and SCSI status 0 178 * (may need to deal with stacked interrupts?) 179 */ 180 sc->sc_sstat0 = rp->siop_sstat0; 181 sc->sc_istat = istat; 182 sc->sc_dstat = rp->siop_dstat; 183 /* 184 * disable interrupts until the callback can process this 185 * interrupt. 186 */ 187 rp->siop_sien = 0; 188 rp->siop_dien = 0; 189 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 190 add_sicallback (siopintr, sc, NULL); 191 return(1); 192 } 193
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