1 /* $NetBSD: zssc.c,v 1.44 2010/12/20 00:25:26 matt Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)dma.c 32 */ 33 34 /* 35 * Copyright (c) 1994 Michael L. Hitch 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 49 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 50 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 51 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 52 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 53 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 54 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 55 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 56 * 57 * @(#)dma.c 58 */ 59 60 #include <sys/cdefs.h> 61 __KERNEL_RCSID(0, "$NetBSD: zssc.c,v 1.44 2010/12/20 00:25:26 matt Exp $"); 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #include <sys/device.h> 67 68 #include <dev/scsipi/scsi_all.h> 69 #include <dev/scsipi/scsipi_all.h> 70 #include <dev/scsipi/scsiconf.h> 71 #include <amiga/amiga/custom.h> 72 #include <amiga/amiga/cc.h> 73 #include <amiga/amiga/device.h> 74 #include <amiga/amiga/isr.h> 75 #include <amiga/dev/siopreg.h> 76 #include <amiga/dev/siopvar.h> 77 #include <amiga/dev/zbusvar.h> 78 79 void zsscattach(struct device *, struct device *, void *); 80 int zsscmatch(struct device *, struct cfdata *, void *); 81 int zssc_dmaintr(void *); 82 #ifdef DEBUG 83 void zssc_dump(void); 84 #endif 85 86 CFATTACH_DECL(zssc, sizeof(struct siop_softc), 87 zsscmatch, zsscattach, NULL, NULL); 88 89 /* 90 * if we are an PPI Zeus 91 */ 92 int 93 zsscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 94 { 95 struct zbus_args *zap; 96 97 zap = auxp; 98 if (zap->manid == 2026 && zap->prodid == 150) 99 return(1); 100 return(0); 101 } 102 103 void 104 zsscattach(struct device *pdp, struct device *dp, void *auxp) 105 { 106 struct siop_softc *sc; 107 struct zbus_args *zap; 108 siop_regmap_p rp; 109 110 printf("\n"); 111 112 zap = auxp; 113 114 sc = (struct siop_softc *)dp; 115 sc->sc_siopp = rp = (siop_regmap_p)((char *)zap->va + 0x4000); 116 117 /* 118 * CTEST7 = 00 119 */ 120 sc->sc_clock_freq = 66; /* Clock = 66 MHz */ 121 sc->sc_ctest7 = 0x00; 122 sc->sc_dcntl = 0x00; 123 124 sc->sc_siop_si = softint_establish(SOFTINT_BIO, 125 (void (*)(void *))siopintr, sc); 126 127 sc->sc_adapter.adapt_dev = &sc->sc_dev; 128 sc->sc_adapter.adapt_nchannels = 1; 129 sc->sc_adapter.adapt_openings = 7; 130 sc->sc_adapter.adapt_max_periph = 1; 131 sc->sc_adapter.adapt_ioctl = NULL; 132 sc->sc_adapter.adapt_minphys = siop_minphys; 133 sc->sc_adapter.adapt_request = siop_scsipi_request; 134 135 sc->sc_channel.chan_adapter = &sc->sc_adapter; 136 sc->sc_channel.chan_bustype = &scsi_bustype; 137 sc->sc_channel.chan_channel = 0; 138 sc->sc_channel.chan_ntargets = 8; 139 sc->sc_channel.chan_nluns = 8; 140 sc->sc_channel.chan_id = 7; 141 142 siopinitialize(sc); 143 144 sc->sc_isr.isr_intr = zssc_dmaintr; 145 sc->sc_isr.isr_arg = sc; 146 sc->sc_isr.isr_ipl = 6; 147 add_isr(&sc->sc_isr); 148 149 /* 150 * attach all scsi units on us 151 */ 152 config_found(dp, &sc->sc_channel, scsiprint); 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 a softint scheduled. This way, 159 * the actual processing of the interrupt can be deferred until 160 * splbio is unblocked. 161 */ 162 163 int 164 zssc_dmaintr(void *arg) 165 { 166 struct siop_softc *sc = arg; 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 softint_schedule(sc->sc_siop_si); 191 return(1); 192 } 193 194 #ifdef DEBUG 195 void 196 zssc_dump(void) 197 { 198 extern struct cfdriver zssc_cd; 199 struct siop_softc *sc; 200 int i; 201 202 for (i = 0; i < zssc_cd.cd_ndevs; ++i) { 203 sc = device_lookup_private(&zssc_cd, i); 204 if (sc != NULL) 205 siop_dump(sc); 206 } 207 } 208 #endif 209