zssc.c revision 1.29
1 /* $NetBSD: zssc.c,v 1.29 2001/04/25 17:53:10 bouyer 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 <dev/scsipi/scsi_all.h> 44 #include <dev/scsipi/scsipi_all.h> 45 #include <dev/scsipi/scsiconf.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 zsscattach __P((struct device *, struct device *, void *)); 55 int zsscmatch __P((struct device *, struct cfdata *, void *)); 56 int zssc_dmaintr __P((void *)); 57 #ifdef DEBUG 58 void zssc_dump __P((void)); 59 #endif 60 61 struct cfattach zssc_ca = { 62 sizeof(struct siop_softc), zsscmatch, zsscattach 63 }; 64 65 /* 66 * if we are an PPI Zeus 67 */ 68 int 69 zsscmatch(pdp, cfp, auxp) 70 struct device *pdp; 71 struct cfdata *cfp; 72 void *auxp; 73 { 74 struct zbus_args *zap; 75 76 zap = auxp; 77 if (zap->manid == 2026 && zap->prodid == 150) 78 return(1); 79 return(0); 80 } 81 82 void 83 zsscattach(pdp, dp, auxp) 84 struct device *pdp, *dp; 85 void *auxp; 86 { 87 struct siop_softc *sc; 88 struct zbus_args *zap; 89 siop_regmap_p rp; 90 91 printf("\n"); 92 93 zap = auxp; 94 95 sc = (struct siop_softc *)dp; 96 sc->sc_siopp = rp = (siop_regmap_p)((caddr_t)zap->va + 0x4000); 97 98 /* 99 * CTEST7 = 00 100 */ 101 sc->sc_clock_freq = 66; /* Clock = 66Mhz */ 102 sc->sc_ctest7 = 0x00; 103 sc->sc_dcntl = 0x00; 104 105 alloc_sicallback(); 106 107 sc->sc_adapter.adapt_dev = &sc->sc_dev; 108 sc->sc_adapter.adapt_nchannels = 1; 109 sc->sc_adapter.adapt_openings = 7; 110 sc->sc_adapter.adapt_max_periph = 1; 111 sc->sc_adapter.adapt_ioctl = NULL; 112 sc->sc_adapter.adapt_minphys = siop_minphys; 113 sc->sc_adapter.adapt_request = siop_scsipi_request; 114 115 sc->sc_channel.chan_adapter = &sc->sc_adapter; 116 sc->sc_channel.chan_bustype = &scsi_bustype; 117 sc->sc_channel.chan_channel = 0; 118 sc->sc_channel.chan_ntargets = 8; 119 sc->sc_channel.chan_nluns = 8; 120 sc->sc_channel.chan_id = 7; 121 122 siopinitialize(sc); 123 124 sc->sc_isr.isr_intr = zssc_dmaintr; 125 sc->sc_isr.isr_arg = sc; 126 sc->sc_isr.isr_ipl = 6; 127 add_isr(&sc->sc_isr); 128 129 /* 130 * attach all scsi units on us 131 */ 132 config_found(dp, &sc->sc_channel, scsiprint); 133 } 134 135 /* 136 * Level 6 interrupt processing for the Progressive Peripherals Inc 137 * Zeus SCSI. Because the level 6 interrupt is above splbio, the 138 * interrupt status is saved and an sicallback to the level 2 interrupt 139 * handler scheduled. This way, the actual processing of the interrupt 140 * can be deferred until splbio is unblocked. 141 */ 142 143 int 144 zssc_dmaintr(arg) 145 void *arg; 146 { 147 struct siop_softc *sc = arg; 148 siop_regmap_p rp; 149 int istat; 150 151 if (sc->sc_flags & SIOP_INTSOFF) 152 return (0); /* interrupts are not active */ 153 rp = sc->sc_siopp; 154 istat = rp->siop_istat; 155 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 156 return(0); 157 /* 158 * save interrupt status, DMA status, and SCSI status 0 159 * (may need to deal with stacked interrupts?) 160 */ 161 sc->sc_sstat0 = rp->siop_sstat0; 162 sc->sc_istat = istat; 163 sc->sc_dstat = rp->siop_dstat; 164 /* 165 * disable interrupts until the callback can process this 166 * interrupt. 167 */ 168 rp->siop_sien = 0; 169 rp->siop_dien = 0; 170 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 171 add_sicallback((sifunc_t)siopintr, sc, NULL); 172 return(1); 173 } 174 175 #ifdef DEBUG 176 void 177 zssc_dump() 178 { 179 extern struct cfdriver zssc_cd; 180 int i; 181 182 for (i = 0; i < zssc_cd.cd_ndevs; ++i) 183 if (zssc_cd.cd_devs[i]) 184 siop_dump(zssc_cd.cd_devs[i]); 185 } 186 #endif 187
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