1 /* $NetBSD: drsc.c,v 1.28 2005/12/11 12:16:28 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Ignatios Souvatzis 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)dma.c 33 */ 34 35 /* 36 * Copyright (c) 1994 Michael L. Hitch 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 * 58 * @(#)dma.c 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: drsc.c,v 1.28 2005/12/11 12:16:28 christos Exp $"); 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/kernel.h> 67 #include <sys/device.h> 68 69 #include <uvm/uvm_extern.h> 70 71 #include <dev/scsipi/scsi_all.h> 72 #include <dev/scsipi/scsipi_all.h> 73 #include <dev/scsipi/scsiconf.h> 74 #include <amiga/amiga/custom.h> 75 #include <amiga/amiga/cc.h> 76 #include <amiga/amiga/device.h> 77 #include <amiga/amiga/isr.h> 78 #include <amiga/dev/siopreg.h> 79 #include <amiga/dev/siopvar.h> 80 #include <amiga/amiga/drcustom.h> 81 82 #include <machine/cpu.h> /* is_xxx(), */ 83 84 void drscattach(struct device *, struct device *, void *); 85 int drscmatch(struct device *, struct cfdata *, void *); 86 int drsc_dmaintr(struct siop_softc *); 87 #ifdef DEBUG 88 void drsc_dump(void); 89 #endif 90 91 #ifdef DEBUG 92 #endif 93 94 CFATTACH_DECL(drsc, sizeof(struct siop_softc), 95 drscmatch, drscattach, NULL, NULL); 96 97 static struct siop_softc *drsc_softc; 98 99 /* 100 * One of us is on every DraCo motherboard, 101 */ 102 int 103 drscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 104 { 105 static int drsc_matched = 0; 106 107 /* Allow only one instance. */ 108 if (!is_draco() || !matchname(auxp, "drsc") || drsc_matched) 109 return (0); 110 111 drsc_matched = 1; 112 return(1); 113 } 114 115 void 116 drscattach(struct device *pdp, struct device *dp, void *auxp) 117 { 118 struct siop_softc *sc = (struct siop_softc *)dp; 119 struct zbus_args *zap; 120 siop_regmap_p rp; 121 struct scsipi_adapter *adapt = &sc->sc_adapter; 122 struct scsipi_channel *chan = &sc->sc_channel; 123 124 printf("\n"); 125 126 zap = auxp; 127 128 sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+PAGE_SIZE*DRSCSIPG); 129 130 /* 131 * CTEST7 = TT1 132 */ 133 sc->sc_clock_freq = 50; /* Clock = 50MHz */ 134 sc->sc_ctest7 = 0x02; 135 136 alloc_sicallback(); 137 138 /* 139 * Fill in the scsipi_adapter. 140 */ 141 memset(adapt, 0, sizeof(*adapt)); 142 adapt->adapt_dev = &sc->sc_dev; 143 adapt->adapt_nchannels = 1; 144 adapt->adapt_openings = 7; 145 adapt->adapt_max_periph = 1; 146 adapt->adapt_request = siop_scsipi_request; 147 adapt->adapt_minphys = siop_minphys; 148 149 /* 150 * Fill in the scsipi_channel. 151 */ 152 memset(chan, 0, sizeof(*chan)); 153 chan->chan_adapter = adapt; 154 chan->chan_bustype = &scsi_bustype; 155 chan->chan_channel = 0; 156 chan->chan_ntargets = 8; 157 chan->chan_nluns = 8; 158 chan->chan_id = 7; 159 160 siopinitialize(sc); 161 162 #if 0 163 sc->sc_isr.isr_intr = drsc_dmaintr; 164 sc->sc_isr.isr_arg = sc; 165 sc->sc_isr.isr_ipl = 4; 166 add_isr(&sc->sc_isr); 167 #else 168 drsc_softc = sc; 169 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 170 single_inst_bset_b(*draco_intena, DRIRQ_SCSI); 171 #endif 172 /* 173 * attach all scsi units on us 174 */ 175 config_found(dp, chan, scsiprint); 176 } 177 178 /* 179 * Level 4 interrupt processing for the MacroSystem DraCo mainboard 180 * SCSI. Because the level 4 interrupt is above splbio, the 181 * interrupt status is saved and an sicallback to the level 2 interrupt 182 * handler scheduled. This way, the actual processing of the interrupt 183 * can be deferred until splbio is unblocked. 184 */ 185 186 void 187 drsc_handler(void) 188 { 189 struct siop_softc *sc = drsc_softc; 190 191 siop_regmap_p rp; 192 int istat; 193 194 if (sc->sc_flags & SIOP_INTSOFF) 195 return; /* interrupts are not active */ 196 197 rp = sc->sc_siopp; 198 istat = rp->siop_istat; 199 200 if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) 201 return; 202 203 /* 204 * save interrupt status, DMA status, and SCSI status 0 205 * (may need to deal with stacked interrupts?) 206 */ 207 sc->sc_sstat0 = rp->siop_sstat0; 208 sc->sc_istat = istat; 209 sc->sc_dstat = rp->siop_dstat; 210 /* 211 * disable interrupts until the callback can process this 212 * interrupt. 213 */ 214 #ifdef DRSC_NOCALLBACK 215 (void)spl1(); 216 siopintr(sc); 217 #else 218 rp->siop_sien = 0; 219 rp->siop_dien = 0; 220 sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; 221 single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); 222 #ifdef DEBUG 223 if (*draco_intpen & DRIRQ_SCSI) 224 printf("%s: intpen still 0x%x\n", sc->sc_dev.dv_xname, 225 *draco_intpen); 226 #endif 227 add_sicallback((sifunc_t)siopintr, sc, NULL); 228 #endif 229 return; 230 } 231 232 #ifdef DEBUG 233 void 234 drsc_dump(void) 235 { 236 extern struct cfdriver drsc_cd; 237 int i; 238 239 for (i = 0; i < drsc_cd.cd_ndevs; ++i) 240 if (drsc_cd.cd_devs[i]) 241 siop_dump(drsc_cd.cd_devs[i]); 242 } 243 #endif 244