wdsc.c revision 1.19
1 /* $NetBSD: wdsc.c,v 1.19 2007/02/20 21:54:44 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 1.19 2007/02/20 21:54:44 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 *, caddr_t *,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 */ 179 180 /* IP12 runs at 20mhz, all others at 10. XXX - GIO SCSI cards? */ 181 if (mach_type == MACH_SGI_IP12) 182 sc->sc_clkfreq = 200; 183 else 184 sc->sc_clkfreq = 100; 185 186 sc->sc_dmamode = SBIC_CTL_DMA; 187 188 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 189 sc->sc_dev.dv_xname, "intr"); 190 191 if ((cpu_intr_establish(haa->ha_irq, IPL_BIO, 192 wdsc_scsiintr, sc)) == NULL) { 193 printf(": unable to establish interrupt!\n"); 194 return; 195 } 196 197 hpcdma_init(haa, &wsc->sc_hpcdma, wsc->sc_hpcdma.hpc->scsi_dma_segs); 198 wd33c93_attach(sc); 199 return; 200 } 201 202 /* 203 * Prime the hardware for a DMA transfer 204 * 205 * Requires splbio() interrupts to be disabled by the caller 206 */ 207 int 208 wdsc_dmasetup(struct wd33c93_softc *dev, caddr_t *addr, size_t *len, int datain, size_t *dmasize) 209 { 210 struct wdsc_softc *wsc = (void *)dev; 211 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 212 int count, err; 213 void *vaddr; 214 215 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 216 217 vaddr = *addr; 218 count = dsc->sc_dlen = *len; 219 if (count) { 220 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 221 222 /* Build list of physical addresses for this transfer */ 223 if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 224 vaddr, count, 225 NULL /* kernel address */, 226 BUS_DMA_NOWAIT)) != 0) 227 panic("%s: bus_dmamap_load err=%d", 228 dev->sc_dev.dv_xname, err); 229 230 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 231 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 232 233 if (datain) { 234 dsc->sc_dmacmd = 235 wsc->sc_hpcdma.hpc->scsi_dma_datain_cmd; 236 dsc->sc_flags |= HPCDMA_READ; 237 } else { 238 dsc->sc_dmacmd = 239 wsc->sc_hpcdma.hpc->scsi_dma_dataout_cmd; 240 dsc->sc_flags &= ~HPCDMA_READ; 241 } 242 } 243 return(count); 244 } 245 246 /* 247 * Prime the hardware for the next DMA transfer 248 */ 249 int 250 wdsc_dmago(struct wd33c93_softc *dev) 251 { 252 struct wdsc_softc *wsc = (void *)dev; 253 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 254 255 if (dsc->sc_dlen == 0) 256 return(0); 257 258 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 259 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 260 261 wsc->sc_flags |= WDSC_DMA_ACTIVE; 262 263 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 264 wsc->sc_dmamap->dm_mapsize, 265 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 266 267 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 268 269 return(wsc->sc_dmamap->dm_mapsize); 270 } 271 272 /* 273 * Stop DMA and unload active DMA maps 274 */ 275 void 276 wdsc_dmastop(struct wd33c93_softc *dev) 277 { 278 struct wdsc_softc *wsc = (void *)dev; 279 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 280 281 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 282 if (dsc->sc_flags & HPCDMA_READ) 283 hpcdma_flush(dsc); 284 hpcdma_cntl(dsc, 0); /* Stop DMA */ 285 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 286 wsc->sc_dmamap->dm_mapsize, 287 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 288 } 289 if (wsc->sc_flags & WDSC_DMA_MAPLOADED) 290 bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap); 291 wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED); 292 } 293 294 /* 295 * Reset the controller. 296 */ 297 void 298 wdsc_reset(struct wd33c93_softc *dev) 299 { 300 struct wdsc_softc *wsc = (void *)dev; 301 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 302 303 hpcdma_reset(dsc); 304 } 305 306 /* 307 * WD33c93 SCSI controller interrupt 308 */ 309 int 310 wdsc_scsiintr(void *arg) 311 { 312 struct wd33c93_softc *dev = arg; 313 struct wdsc_softc *wsc = arg; 314 int found; 315 316 found = wd33c93_intr(dev); 317 if (found) 318 wsc->sc_intrcnt.ev_count++; 319 return(found); 320 } 321
Indexes created Wed Sep 24 05:09:52 GMT 2025