wdsc.c revision 1.4
1 /* $NetBSD: wdsc.c,v 1.4 2001/11/18 08:16:16 thorpej 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 int wdsc_dmasetup __P((struct sbic_softc *, caddr_t *,size_t *, 88 int, size_t *)); 89 int wdsc_dmago __P((struct sbic_softc *)); 90 void wdsc_dmastop __P((struct sbic_softc *)); 91 void wdsc_reset __P((struct sbic_softc *)); 92 int wdsc_dmaintr __P((void *)); 93 int wdsc_scsiintr __P((void *)); 94 95 #define MAX_SCSI_XFER (512*1024) 96 #define MAX_SEG_SZ 8192 97 #define MAX_DMA_SZ MAX_SCSI_XFER 98 #define DMA_SEGS (MAX_DMA_SZ/MAX_SEG_SZ) 99 100 /* 101 * Match for SCSI devices on the onboard WD33C93 chip 102 */ 103 int 104 wdsc_match(pdp, cf, auxp) 105 struct device *pdp; 106 struct cfdata *cf; 107 void *auxp; 108 { 109 struct hpc_attach_args *haa = auxp; 110 111 if (strcmp(haa->ha_name, cf->cf_driver->cd_name) == 0) 112 return (1); 113 114 return (0); 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_st; 131 wsc->sc_dmat = haa->ha_dmat; 132 133 if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh, 134 haa->ha_devoff, 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 sc->sc_reset = wdsc_reset; 153 154 sc->sc_adapter.adapt_request = sbic_scsi_request; 155 sc->sc_adapter.adapt_minphys = minphys; 156 157 sc->sc_id = 7; /* Host ID = 7 */ 158 sc->sc_clkfreq = 200; /* 20MHz Clock */ 159 160 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 161 sc->sc_dev.dv_xname, "intr"); 162 163 if ((cpu_intr_establish(haa->ha_irq, IPL_BIO, 164 wdsc_scsiintr, sc)) == NULL) { 165 printf(": unable to establish interrupt!\n"); 166 return; 167 } 168 169 hpcdma_init(haa, &wsc->sc_hpcdma, DMA_SEGS); 170 sbic_attach(sc); 171 return; 172 } 173 174 /* 175 * Prime the hardware for a DMA transfer 176 * 177 * Requires splbio() interrupts to be disabled by the caller 178 */ 179 int 180 wdsc_dmasetup(dev, addr, len, datain, dmasize) 181 struct sbic_softc *dev; 182 caddr_t *addr; 183 size_t *len; 184 int datain; 185 size_t *dmasize; 186 { 187 struct wdsc_softc *wsc = (void *)dev; 188 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 189 int count, err; 190 void *vaddr; 191 192 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 193 194 vaddr = *addr; 195 count = dsc->sc_dlen = *len; 196 if (count) { 197 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 198 199 /* Build list of physical addresses for this transfer */ 200 if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 201 vaddr, count, 202 NULL /* kernel address */, 203 BUS_DMA_NOWAIT)) != 0) 204 panic("%s: bus_dmamap_load err=%d", 205 dev->sc_dev.dv_xname, err); 206 207 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 208 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 209 210 if (datain) { 211 dsc->sc_dmacmd = HPC_DMACTL_ACTIVE; 212 dsc->sc_flags |= HPCDMA_READ; 213 } else { 214 dsc->sc_dmacmd = HPC_DMACTL_ACTIVE | HPC_DMACTL_DIR; 215 dsc->sc_flags &= ~HPCDMA_READ; 216 } 217 } 218 return(count); 219 } 220 221 /* 222 * Prime the hardware for the next DMA transfer 223 */ 224 int 225 wdsc_dmago(dev) 226 struct sbic_softc *dev; 227 { 228 struct wdsc_softc *wsc = (void *)dev; 229 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 230 231 if (dsc->sc_dlen == 0) 232 return(0); 233 234 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 235 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 236 237 wsc->sc_flags |= WDSC_DMA_ACTIVE; 238 239 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 240 wsc->sc_dmamap->dm_mapsize, 241 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 242 243 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 244 245 return(wsc->sc_dmamap->dm_mapsize); 246 } 247 248 /* 249 * Stop DMA and unload active DMA maps 250 */ 251 void 252 wdsc_dmastop(dev) 253 struct sbic_softc *dev; 254 { 255 struct wdsc_softc *wsc = (void *)dev; 256 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 257 258 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 259 if (dsc->sc_flags & HPCDMA_READ) 260 hpcdma_flush(dsc); 261 hpcdma_cntl(dsc, 0); /* Stop DMA */ 262 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 263 wsc->sc_dmamap->dm_mapsize, 264 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 265 } 266 if (wsc->sc_flags & WDSC_DMA_MAPLOADED) 267 bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap); 268 wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED); 269 } 270 271 /* 272 * Reset the controller. 273 */ 274 void 275 wdsc_reset(dev) 276 struct sbic_softc *dev; 277 { 278 struct wdsc_softc *wsc = (void *)dev; 279 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 280 281 hpcdma_reset(dsc); 282 } 283 284 /* 285 * WD33c93 SCSI controller interrupt 286 */ 287 int 288 wdsc_scsiintr(arg) 289 void *arg; 290 { 291 struct sbic_softc *dev = arg; 292 struct wdsc_softc *wsc = arg; 293 int found; 294 295 found = sbic_intr(dev); 296 if (found) 297 wsc->sc_intrcnt.ev_count++; 298 return(found); 299 } 300
Indexes created Wed Sep 24 02:09:48 GMT 2025