wdsc.c revision 1.2
1 /* $NetBSD: wdsc.c,v 1.2 2001/11/10 07:32:43 wdk Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wayne Knowles 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wayne Knowles 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * TODO: 41 * Support for 2nd SCSI controller 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/device.h> 48 #include <sys/buf.h> 49 50 #include <dev/scsipi/scsi_all.h> 51 #include <dev/scsipi/scsipi_all.h> 52 #include <dev/scsipi/scsiconf.h> 53 54 #include <machine/cpu.h> 55 #include <machine/bus.h> 56 #include <machine/autoconf.h> 57 58 #include <sgimips/hpc/hpcvar.h> 59 #include <sgimips/hpc/hpcreg.h> 60 #include <sgimips/hpc/hpcdma.h> 61 62 #include <sgimips/hpc/sbicreg.h> 63 #include <sgimips/hpc/sbicvar.h> 64 65 #include <opt_kgdb.h> 66 #include <sys/kgdb.h> 67 68 struct wdsc_softc { 69 struct sbic_softc sc_sbic; /* Must be first */ 70 struct evcnt sc_intrcnt; /* Interrupt counter */ 71 bus_dma_tag_t sc_dmat; 72 bus_dmamap_t sc_dmamap; 73 int sc_flags; 74 #define WDSC_DMA_ACTIVE 0x1 75 #define WDSC_DMA_MAPLOADED 0x2 76 struct hpc_dma_softc sc_hpcdma; 77 }; 78 79 80 void wdsc_attach __P((struct device *, struct device *, void *)); 81 int wdsc_match __P((struct device *, struct cfdata *, void *)); 82 83 struct cfattach wdsc_ca = { 84 sizeof(struct wdsc_softc), wdsc_match, wdsc_attach 85 }; 86 87 extern struct cfdriver wdsc_cd; 88 89 int wdsc_dmasetup __P((struct sbic_softc *, caddr_t *,size_t *, 90 int, size_t *)); 91 int wdsc_dmago __P((struct sbic_softc *)); 92 void wdsc_dmastop __P((struct sbic_softc *)); 93 int wdsc_dmaintr __P((void *)); 94 int wdsc_scsiintr __P((void *)); 95 96 #define MAX_SCSI_XFER (512*1024) 97 #define MAX_SEG_SZ 8192 98 #define MAX_DMA_SZ MAX_SCSI_XFER 99 #define DMA_SEGS (MAX_DMA_SZ/MAX_SEG_SZ) 100 101 /* 102 * Match for SCSI devices on the onboard WD33C93 chip 103 */ 104 int 105 wdsc_match(pdp, cf, auxp) 106 struct device *pdp; 107 struct cfdata *cf; 108 void *auxp; 109 { 110 struct hpc_attach_args *haa = auxp; 111 112 if (strcmp(haa->ha_name, wdsc_cd.cd_name)) 113 return (0); 114 return (1); 115 } 116 117 /* 118 * Attach the wdsc driver 119 */ 120 void 121 wdsc_attach(pdp, dp, auxp) 122 struct device *pdp, *dp; 123 void *auxp; 124 { 125 struct sbic_softc *sc = (void *)dp; 126 struct wdsc_softc *wsc = (void *)dp; 127 struct hpc_attach_args *haa = auxp; 128 int err; 129 130 sc->sc_regt = haa->ha_iot; 131 wsc->sc_dmat = haa->ha_dmat; 132 133 if ((err = bus_space_subregion(haa->ha_iot, haa->ha_ioh, 134 HPC_SCSI0_DEVREGS, 135 HPC_SCSI0_DEVREGS_SIZE, 136 &sc->sc_regh)) != 0) { 137 printf(": unable to map regs, err=%d\n", err); 138 return; 139 } 140 141 if (bus_dmamap_create(wsc->sc_dmat, MAX_DMA_SZ, 142 DMA_SEGS, MAX_SEG_SZ, MAX_SEG_SZ, 143 BUS_DMA_WAITOK, 144 &wsc->sc_dmamap) != 0) { 145 printf(": failed to create dmamap\n"); 146 return; 147 } 148 149 sc->sc_dmasetup = wdsc_dmasetup; 150 sc->sc_dmago = wdsc_dmago; 151 sc->sc_dmastop = wdsc_dmastop; 152 153 sc->sc_adapter.adapt_request = sbic_scsi_request; 154 sc->sc_adapter.adapt_minphys = minphys; 155 156 sc->sc_id = 7; /* Host ID = 7 */ 157 sc->sc_clkfreq = 200; /* 20MHz Clock */ 158 159 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 160 sc->sc_dev.dv_xname, "intr"); 161 162 /* XXX: 1 = IRQ_LOCAL0 + 1 */ 163 if ((cpu_intr_establish(1, IPL_BIO, wdsc_scsiintr, sc)) == NULL) { 164 printf(": unable to establish interrupt!\n"); 165 return; 166 } 167 168 hpcdma_init(haa, &wsc->sc_hpcdma, DMA_SEGS); 169 sbic_attach(sc); 170 return; 171 } 172 173 /* 174 * Prime the hardware for a DMA transfer 175 * 176 * Requires splbio() interrupts to be disabled by the caller 177 */ 178 int 179 wdsc_dmasetup(dev, addr, len, datain, dmasize) 180 struct sbic_softc *dev; 181 caddr_t *addr; 182 size_t *len; 183 int datain; 184 size_t *dmasize; 185 { 186 struct wdsc_softc *wsc = (void *)dev; 187 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 188 int count, err; 189 void *vaddr; 190 191 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 192 193 vaddr = *addr; 194 count = dsc->sc_dlen = *len; 195 if (count) { 196 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 197 198 /* Build list of physical addresses for this transfer */ 199 if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 200 vaddr, count, 201 NULL /* kernel address */, 202 BUS_DMA_NOWAIT)) != 0) 203 panic("%s: bus_dmamap_load err=%d", 204 dev->sc_dev.dv_xname, err); 205 206 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 207 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 208 209 if (datain) { 210 dsc->sc_dmacmd = HPC_DMACTL_ACTIVE; 211 dsc->sc_flags |= HPCDMA_READ; 212 } else { 213 dsc->sc_dmacmd = HPC_DMACTL_ACTIVE | HPC_DMACTL_DIR; 214 dsc->sc_flags &= ~HPCDMA_READ; 215 } 216 } 217 return(count); 218 } 219 220 /* 221 * Prime the hardware for the next DMA transfer 222 */ 223 int 224 wdsc_dmago(dev) 225 struct sbic_softc *dev; 226 { 227 struct wdsc_softc *wsc = (void *)dev; 228 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 229 230 if (dsc->sc_dlen == 0) 231 return(0); 232 233 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 234 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 235 236 wsc->sc_flags |= WDSC_DMA_ACTIVE; 237 238 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 239 wsc->sc_dmamap->dm_mapsize, 240 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 241 242 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 243 244 return(wsc->sc_dmamap->dm_mapsize); 245 } 246 247 /* 248 * Stop DMA and unload active DMA maps 249 */ 250 void 251 wdsc_dmastop(dev) 252 struct sbic_softc *dev; 253 { 254 struct wdsc_softc *wsc = (void *)dev; 255 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 256 257 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 258 if (dsc->sc_flags & HPCDMA_READ) 259 hpcdma_flush(dsc); 260 hpcdma_cntl(dsc, 0); /* Stop DMA */ 261 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 262 wsc->sc_dmamap->dm_mapsize, 263 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 264 } 265 if (wsc->sc_flags & WDSC_DMA_MAPLOADED) 266 bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap); 267 wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED); 268 } 269 270 /* 271 * WD33c93 SCSI controller interrupt 272 */ 273 int 274 wdsc_scsiintr(arg) 275 void *arg; 276 { 277 struct sbic_softc *dev = arg; 278 struct wdsc_softc *wsc = arg; 279 int found; 280 281 found = sbic_intr(dev); 282 if (found) 283 wsc->sc_intrcnt.ev_count++; 284 return(found); 285 } 286
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