wdsc.c revision 1.22
1 /* $NetBSD: wdsc.c,v 1.22 2007/05/06 23:49:57 rumble 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/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: wdsc.c,v 1.22 2007/05/06 23:49:57 rumble Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 #include <sys/buf.h> 47 48 #include <dev/scsipi/scsi_all.h> 49 #include <dev/scsipi/scsipi_all.h> 50 #include <dev/scsipi/scsiconf.h> 51 52 #include <machine/cpu.h> 53 #include <machine/bus.h> 54 #include <machine/autoconf.h> 55 #include <machine/machtype.h> 56 #include <machine/sysconf.h> 57 58 #include <sgimips/hpc/hpcvar.h> 59 #include <sgimips/hpc/hpcreg.h> 60 #include <sgimips/hpc/hpcdma.h> 61 62 #include <dev/ic/wd33c93reg.h> 63 #include <dev/ic/wd33c93var.h> 64 65 #include <opt_kgdb.h> 66 #include <sys/kgdb.h> 67 68 struct wdsc_softc { 69 struct wd33c93_softc sc_wd33c93; /* 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 (struct device *, struct device *, void *); 81 int wdsc_match (struct device *, struct cfdata *, void *); 82 83 CFATTACH_DECL(wdsc, sizeof(struct wdsc_softc), 84 wdsc_match, wdsc_attach, NULL, NULL); 85 86 int wdsc_dmasetup (struct wd33c93_softc *, void **,size_t *, 87 int, size_t *); 88 int wdsc_dmago (struct wd33c93_softc *); 89 void wdsc_dmastop (struct wd33c93_softc *); 90 void wdsc_reset (struct wd33c93_softc *); 91 int wdsc_dmaintr (void *); 92 int wdsc_scsiintr (void *); 93 94 /* 95 * Match for SCSI devices on the onboard and GIO32 adapter WD33C93 chips 96 */ 97 int 98 wdsc_match(struct device *pdp, struct cfdata *cf, void *auxp) 99 { 100 struct hpc_attach_args *haa = auxp; 101 102 if (strcmp(haa->ha_name, cf->cf_name) == 0) { 103 uint32_t reset, asr, reg; 104 105 reset = MIPS_PHYS_TO_KSEG1(haa->ha_sh + haa->ha_dmaoff + 106 haa->hpc_regs->scsi0_ctl); 107 asr = MIPS_PHYS_TO_KSEG1(haa->ha_sh + haa->ha_devoff); 108 109 /* XXX: hpc1 offset due to SGIMIPS_BUS_SPACE_HPC brain damage */ 110 asr = (asr + 3) & ~0x3; 111 112 if (platform.badaddr((void *)reset, sizeof(reset))) 113 return (0); 114 115 *(volatile uint32_t *)reset = haa->hpc_regs->scsi_dmactl_reset; 116 delay(1000); 117 *(volatile uint32_t *)reset = 0x0; 118 119 if (platform.badaddr((void *)asr, sizeof(asr))) 120 return (0); 121 122 reg = *(volatile uint32_t *)asr; 123 if (haa->hpc_regs->revision == 3) { 124 if ((reg & 0xff) == SBIC_ASR_INT) 125 return (1); 126 } else { 127 if (((reg >> 8) & 0xff) == SBIC_ASR_INT) 128 return (1); 129 } 130 } 131 132 return (0); 133 } 134 135 /* 136 * Attach the wdsc driver 137 */ 138 void 139 wdsc_attach(struct device *pdp, struct device *dp, void *auxp) 140 { 141 struct wd33c93_softc *sc = (void *)dp; 142 struct wdsc_softc *wsc = (void *)dp; 143 struct hpc_attach_args *haa = auxp; 144 int err; 145 146 sc->sc_regt = haa->ha_st; 147 wsc->sc_dmat = haa->ha_dmat; 148 149 wsc->sc_hpcdma.hpc = haa->hpc_regs; 150 151 if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh, 152 haa->ha_devoff, 153 wsc->sc_hpcdma.hpc->scsi0_devregs_size, 154 &sc->sc_regh)) != 0) { 155 printf(": unable to map regs, err=%d\n", err); 156 return; 157 } 158 159 if (bus_dmamap_create(wsc->sc_dmat, 160 wsc->sc_hpcdma.hpc->scsi_max_xfer, 161 wsc->sc_hpcdma.hpc->scsi_dma_segs, 162 wsc->sc_hpcdma.hpc->scsi_dma_segs_size, 163 wsc->sc_hpcdma.hpc->scsi_dma_segs_size, 164 BUS_DMA_WAITOK, 165 &wsc->sc_dmamap) != 0) { 166 printf(": failed to create dmamap\n"); 167 return; 168 } 169 170 sc->sc_dmasetup = wdsc_dmasetup; 171 sc->sc_dmago = wdsc_dmago; 172 sc->sc_dmastop = wdsc_dmastop; 173 sc->sc_reset = wdsc_reset; 174 175 sc->sc_adapter.adapt_request = wd33c93_scsi_request; 176 sc->sc_adapter.adapt_minphys = minphys; 177 178 sc->sc_id = 0; /* Host ID = 0 */ 179 sc->sc_clkfreq = 200; /* 20MHz */ 180 sc->sc_dmamode = SBIC_CTL_BURST_DMA; 181 182 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 183 sc->sc_dev.dv_xname, "intr"); 184 185 if ((cpu_intr_establish(haa->ha_irq, IPL_BIO, 186 wdsc_scsiintr, sc)) == NULL) { 187 printf(": unable to establish interrupt!\n"); 188 return; 189 } 190 191 hpcdma_init(haa, &wsc->sc_hpcdma, wsc->sc_hpcdma.hpc->scsi_dma_segs); 192 wd33c93_attach(sc); 193 return; 194 } 195 196 /* 197 * Prime the hardware for a DMA transfer 198 * 199 * Requires splbio() interrupts to be disabled by the caller 200 */ 201 int 202 wdsc_dmasetup(struct wd33c93_softc *dev, void **addr, size_t *len, int datain, size_t *dmasize) 203 { 204 struct wdsc_softc *wsc = (void *)dev; 205 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 206 int count, err; 207 void *vaddr; 208 209 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 210 211 vaddr = *addr; 212 count = dsc->sc_dlen = *len; 213 if (count) { 214 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 215 216 /* Build list of physical addresses for this transfer */ 217 if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 218 vaddr, count, 219 NULL /* kernel address */, 220 BUS_DMA_NOWAIT)) != 0) 221 panic("%s: bus_dmamap_load err=%d", 222 dev->sc_dev.dv_xname, err); 223 224 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 225 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 226 227 if (datain) { 228 dsc->sc_dmacmd = 229 wsc->sc_hpcdma.hpc->scsi_dma_datain_cmd; 230 dsc->sc_flags |= HPCDMA_READ; 231 } else { 232 dsc->sc_dmacmd = 233 wsc->sc_hpcdma.hpc->scsi_dma_dataout_cmd; 234 dsc->sc_flags &= ~HPCDMA_READ; 235 } 236 } 237 return(count); 238 } 239 240 /* 241 * Prime the hardware for the next DMA transfer 242 */ 243 int 244 wdsc_dmago(struct wd33c93_softc *dev) 245 { 246 struct wdsc_softc *wsc = (void *)dev; 247 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 248 249 if (dsc->sc_dlen == 0) 250 return(0); 251 252 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 253 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 254 255 wsc->sc_flags |= WDSC_DMA_ACTIVE; 256 257 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 258 wsc->sc_dmamap->dm_mapsize, 259 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 260 261 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 262 263 return(wsc->sc_dmamap->dm_mapsize); 264 } 265 266 /* 267 * Stop DMA and unload active DMA maps 268 */ 269 void 270 wdsc_dmastop(struct wd33c93_softc *dev) 271 { 272 struct wdsc_softc *wsc = (void *)dev; 273 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 274 275 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 276 if (dsc->sc_flags & HPCDMA_READ) 277 hpcdma_flush(dsc); 278 hpcdma_cntl(dsc, 0); /* Stop DMA */ 279 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 280 wsc->sc_dmamap->dm_mapsize, 281 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 282 } 283 if (wsc->sc_flags & WDSC_DMA_MAPLOADED) 284 bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap); 285 wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED); 286 } 287 288 /* 289 * Reset the controller. 290 */ 291 void 292 wdsc_reset(struct wd33c93_softc *dev) 293 { 294 struct wdsc_softc *wsc = (void *)dev; 295 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 296 297 hpcdma_reset(dsc); 298 } 299 300 /* 301 * WD33c93 SCSI controller interrupt 302 */ 303 int 304 wdsc_scsiintr(void *arg) 305 { 306 struct wd33c93_softc *dev = arg; 307 struct wdsc_softc *wsc = arg; 308 int found; 309 310 found = wd33c93_intr(dev); 311 if (found) 312 wsc->sc_intrcnt.ev_count++; 313 return(found); 314 } 315
Indexes created Mon Sep 22 13:09:51 GMT 2025