1 /* $NetBSD: wdsc.c,v 1.7 2002/03/13 13:12:28 simonb 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 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <sys/buf.h> 44 45 #include <dev/scsipi/scsi_all.h> 46 #include <dev/scsipi/scsipi_all.h> 47 #include <dev/scsipi/scsiconf.h> 48 49 #include <machine/cpu.h> 50 #include <machine/bus.h> 51 #include <machine/autoconf.h> 52 53 #include <sgimips/hpc/hpcvar.h> 54 #include <sgimips/hpc/hpcreg.h> 55 #include <sgimips/hpc/hpcdma.h> 56 57 #include <sgimips/hpc/sbicreg.h> 58 #include <sgimips/hpc/sbicvar.h> 59 60 #include <opt_kgdb.h> 61 #include <sys/kgdb.h> 62 63 struct wdsc_softc { 64 struct wd33c93_softc sc_wd33c93; /* Must be first */ 65 struct evcnt sc_intrcnt; /* Interrupt counter */ 66 bus_dma_tag_t sc_dmat; 67 bus_dmamap_t sc_dmamap; 68 int sc_flags; 69 #define WDSC_DMA_ACTIVE 0x1 70 #define WDSC_DMA_MAPLOADED 0x2 71 struct hpc_dma_softc sc_hpcdma; 72 }; 73 74 75 void wdsc_attach __P((struct device *, struct device *, void *)); 76 int wdsc_match __P((struct device *, struct cfdata *, void *)); 77 78 struct cfattach wdsc_ca = { 79 sizeof(struct wdsc_softc), wdsc_match, wdsc_attach 80 }; 81 82 int wdsc_dmasetup __P((struct wd33c93_softc *, caddr_t *,size_t *, 83 int, size_t *)); 84 int wdsc_dmago __P((struct wd33c93_softc *)); 85 void wdsc_dmastop __P((struct wd33c93_softc *)); 86 void wdsc_reset __P((struct wd33c93_softc *)); 87 int wdsc_dmaintr __P((void *)); 88 int wdsc_scsiintr __P((void *)); 89 90 #define MAX_SCSI_XFER (512*1024) 91 #define MAX_SEG_SZ 8192 92 #define MAX_DMA_SZ MAX_SCSI_XFER 93 #define DMA_SEGS (MAX_DMA_SZ/MAX_SEG_SZ) 94 95 /* 96 * Match for SCSI devices on the onboard WD33C93 chip 97 */ 98 int 99 wdsc_match(pdp, cf, auxp) 100 struct device *pdp; 101 struct cfdata *cf; 102 void *auxp; 103 { 104 struct hpc_attach_args *haa = auxp; 105 106 if (strcmp(haa->ha_name, cf->cf_driver->cd_name) == 0) 107 return (1); 108 109 return (0); 110 } 111 112 /* 113 * Attach the wdsc driver 114 */ 115 void 116 wdsc_attach(pdp, dp, auxp) 117 struct device *pdp, *dp; 118 void *auxp; 119 { 120 struct wd33c93_softc *sc = (void *)dp; 121 struct wdsc_softc *wsc = (void *)dp; 122 struct hpc_attach_args *haa = auxp; 123 int err; 124 125 sc->sc_regt = haa->ha_st; 126 wsc->sc_dmat = haa->ha_dmat; 127 128 if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh, 129 haa->ha_devoff, 130 HPC_SCSI0_DEVREGS_SIZE, 131 &sc->sc_regh)) != 0) { 132 printf(": unable to map regs, err=%d\n", err); 133 return; 134 } 135 136 if (bus_dmamap_create(wsc->sc_dmat, MAX_DMA_SZ, 137 DMA_SEGS, MAX_SEG_SZ, MAX_SEG_SZ, 138 BUS_DMA_WAITOK, 139 &wsc->sc_dmamap) != 0) { 140 printf(": failed to create dmamap\n"); 141 return; 142 } 143 144 sc->sc_dmasetup = wdsc_dmasetup; 145 sc->sc_dmago = wdsc_dmago; 146 sc->sc_dmastop = wdsc_dmastop; 147 sc->sc_reset = wdsc_reset; 148 149 sc->sc_adapter.adapt_request = wd33c93_scsi_request; 150 sc->sc_adapter.adapt_minphys = minphys; 151 152 sc->sc_id = 7; /* Host ID = 7 */ 153 sc->sc_clkfreq = 200; /* 20MHz Clock */ 154 155 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 156 sc->sc_dev.dv_xname, "intr"); 157 158 if ((cpu_intr_establish(haa->ha_irq, IPL_BIO, 159 wdsc_scsiintr, sc)) == NULL) { 160 printf(": unable to establish interrupt!\n"); 161 return; 162 } 163 164 hpcdma_init(haa, &wsc->sc_hpcdma, DMA_SEGS); 165 wd33c93_attach(sc); 166 return; 167 } 168 169 /* 170 * Prime the hardware for a DMA transfer 171 * 172 * Requires splbio() interrupts to be disabled by the caller 173 */ 174 int 175 wdsc_dmasetup(dev, addr, len, datain, dmasize) 176 struct wd33c93_softc *dev; 177 caddr_t *addr; 178 size_t *len; 179 int datain; 180 size_t *dmasize; 181 { 182 struct wdsc_softc *wsc = (void *)dev; 183 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 184 int count, err; 185 void *vaddr; 186 187 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 188 189 vaddr = *addr; 190 count = dsc->sc_dlen = *len; 191 if (count) { 192 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 193 194 /* Build list of physical addresses for this transfer */ 195 if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 196 vaddr, count, 197 NULL /* kernel address */, 198 BUS_DMA_NOWAIT)) != 0) 199 panic("%s: bus_dmamap_load err=%d", 200 dev->sc_dev.dv_xname, err); 201 202 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 203 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 204 205 if (datain) { 206 dsc->sc_dmacmd = HPC_DMACTL_ACTIVE; 207 dsc->sc_flags |= HPCDMA_READ; 208 } else { 209 dsc->sc_dmacmd = HPC_DMACTL_ACTIVE | HPC_DMACTL_DIR; 210 dsc->sc_flags &= ~HPCDMA_READ; 211 } 212 } 213 return(count); 214 } 215 216 /* 217 * Prime the hardware for the next DMA transfer 218 */ 219 int 220 wdsc_dmago(dev) 221 struct wd33c93_softc *dev; 222 { 223 struct wdsc_softc *wsc = (void *)dev; 224 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 225 226 if (dsc->sc_dlen == 0) 227 return(0); 228 229 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 230 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 231 232 wsc->sc_flags |= WDSC_DMA_ACTIVE; 233 234 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 235 wsc->sc_dmamap->dm_mapsize, 236 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 237 238 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 239 240 return(wsc->sc_dmamap->dm_mapsize); 241 } 242 243 /* 244 * Stop DMA and unload active DMA maps 245 */ 246 void 247 wdsc_dmastop(dev) 248 struct wd33c93_softc *dev; 249 { 250 struct wdsc_softc *wsc = (void *)dev; 251 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 252 253 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 254 if (dsc->sc_flags & HPCDMA_READ) 255 hpcdma_flush(dsc); 256 hpcdma_cntl(dsc, 0); /* Stop DMA */ 257 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 258 wsc->sc_dmamap->dm_mapsize, 259 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 260 } 261 if (wsc->sc_flags & WDSC_DMA_MAPLOADED) 262 bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap); 263 wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED); 264 } 265 266 /* 267 * Reset the controller. 268 */ 269 void 270 wdsc_reset(dev) 271 struct wd33c93_softc *dev; 272 { 273 struct wdsc_softc *wsc = (void *)dev; 274 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 275 276 hpcdma_reset(dsc); 277 } 278 279 /* 280 * WD33c93 SCSI controller interrupt 281 */ 282 int 283 wdsc_scsiintr(arg) 284 void *arg; 285 { 286 struct wd33c93_softc *dev = arg; 287 struct wdsc_softc *wsc = arg; 288 int found; 289 290 found = wd33c93_intr(dev); 291 if (found) 292 wsc->sc_intrcnt.ev_count++; 293 return(found); 294 } 295