1 /* $NetBSD: wdsc.c,v 1.35 2018/09/02 16:18:50 tsutsui 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 1.35 2018/09/02 16:18:50 tsutsui 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 <sys/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 int wdsc_match(device_t, cfdata_t, void *); 81 void wdsc_attach(device_t, device_t, void *); 82 83 CFATTACH_DECL_NEW(wdsc, sizeof(struct wdsc_softc), 84 wdsc_match, wdsc_attach, NULL, NULL); 85 86 int wdsc_dmasetup(struct wd33c93_softc *, void ** ,size_t *, int, size_t *); 87 int wdsc_dmago(struct wd33c93_softc *); 88 void wdsc_dmastop(struct wd33c93_softc *); 89 void wdsc_reset(struct wd33c93_softc *); 90 int wdsc_dmaintr(void *); 91 int wdsc_scsiintr(void *); 92 93 /* 94 * Match for SCSI devices on the onboard and GIO32 adapter WD33C93 chips 95 */ 96 int 97 wdsc_match(device_t parent, cfdata_t cf, void *aux) 98 { 99 struct hpc_attach_args *haa = aux; 100 101 if (strcmp(haa->ha_name, cf->cf_name) == 0) { 102 vaddr_t reset, asr, reg; 103 104 reset = MIPS_PHYS_TO_KSEG1(haa->ha_sh + haa->ha_dmaoff + 105 haa->hpc_regs->scsi0_ctl); 106 asr = MIPS_PHYS_TO_KSEG1(haa->ha_sh + haa->ha_devoff); 107 108 /* XXX: hpc1 offset due to SGIMIPS_BUS_SPACE_HPC brain damage */ 109 asr = (asr + 3) & ~0x3; 110 111 if (platform.badaddr((void *)reset, sizeof(reset))) 112 return 0; 113 114 *(volatile uint32_t *)reset = haa->hpc_regs->scsi_dmactl_reset; 115 delay(1000); 116 *(volatile uint32_t *)reset = 0x0; 117 118 if (platform.badaddr((void *)asr, sizeof(asr))) 119 return 0; 120 121 reg = *(volatile uint32_t *)asr; 122 if (haa->hpc_regs->revision == 3) { 123 if ((reg & 0xff) == SBIC_ASR_INT) 124 return 1; 125 } else { 126 if (((reg >> 8) & 0xff) == SBIC_ASR_INT) 127 return 1; 128 } 129 } 130 131 return 0; 132 } 133 134 /* 135 * Attach the wdsc driver 136 */ 137 void 138 wdsc_attach(device_t parent, device_t self, void *aux) 139 { 140 struct wdsc_softc *wsc = device_private(self); 141 struct wd33c93_softc *sc = &wsc->sc_wd33c93; 142 struct hpc_attach_args *haa = aux; 143 int err; 144 145 sc->sc_dev = self; 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 + 0 + 3, 1, &sc->sc_asr_regh)) != 0) { 153 printf(": unable to map asr reg, err=%d\n", err); 154 return; 155 } 156 157 if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh, 158 haa->ha_devoff + 4 + 3, 1, &sc->sc_data_regh)) != 0) { 159 printf(": unable to map data reg, err=%d\n", err); 160 return; 161 } 162 163 if (bus_dmamap_create(wsc->sc_dmat, MAXPHYS, 164 wsc->sc_hpcdma.hpc->scsi_dma_segs, 165 wsc->sc_hpcdma.hpc->scsi_dma_segs_size, 166 wsc->sc_hpcdma.hpc->scsi_dma_segs_size, 167 BUS_DMA_WAITOK, &wsc->sc_dmamap) != 0) { 168 printf(": failed to create dmamap\n"); 169 return; 170 } 171 172 sc->sc_dmasetup = wdsc_dmasetup; 173 sc->sc_dmago = wdsc_dmago; 174 sc->sc_dmastop = wdsc_dmastop; 175 sc->sc_reset = wdsc_reset; 176 177 sc->sc_adapter.adapt_request = wd33c93_scsi_request; 178 sc->sc_adapter.adapt_minphys = minphys; 179 180 sc->sc_id = 0; /* Host ID = 0 */ 181 sc->sc_clkfreq = 200; /* 20MHz */ 182 sc->sc_dmamode = SBIC_CTL_BURST_DMA; 183 184 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 185 device_xname(sc->sc_dev), "intr"); 186 187 if ((cpu_intr_establish(haa->ha_irq, IPL_BIO, 188 wdsc_scsiintr, wsc)) == NULL) { 189 printf(": unable to establish interrupt!\n"); 190 return; 191 } 192 193 hpcdma_init(haa, &wsc->sc_hpcdma, wsc->sc_hpcdma.hpc->scsi_dma_segs); 194 wd33c93_attach(sc); 195 } 196 197 /* 198 * Prime the hardware for a DMA transfer 199 * 200 * Requires splbio() interrupts to be disabled by the caller 201 */ 202 int 203 wdsc_dmasetup(struct wd33c93_softc *sc, void **addr, size_t *len, int datain, 204 size_t *dmasize) 205 { 206 struct wdsc_softc *wsc = (struct wdsc_softc *)sc; 207 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 208 int count, err; 209 void *vaddr; 210 211 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 212 213 vaddr = *addr; 214 count = dsc->sc_dlen = *len; 215 if (count) { 216 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 217 218 /* Build list of physical addresses for this transfer */ 219 if ((err = bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 220 vaddr, count, NULL /* kernel address */, 221 BUS_DMA_NOWAIT)) != 0) 222 panic("%s: bus_dmamap_load err=%d", 223 device_xname(sc->sc_dev), err); 224 225 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 226 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 227 228 if (datain) { 229 dsc->sc_dmacmd = 230 wsc->sc_hpcdma.hpc->scsi_dma_datain_cmd; 231 dsc->sc_flags |= HPCDMA_READ; 232 } else { 233 dsc->sc_dmacmd = 234 wsc->sc_hpcdma.hpc->scsi_dma_dataout_cmd; 235 dsc->sc_flags &= ~HPCDMA_READ; 236 } 237 } 238 return count; 239 } 240 241 /* 242 * Prime the hardware for the next DMA transfer 243 */ 244 int 245 wdsc_dmago(struct wd33c93_softc *sc) 246 { 247 struct wdsc_softc *wsc = (struct wdsc_softc *)sc; 248 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 249 250 if (dsc->sc_dlen == 0) 251 return 0; 252 253 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 254 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 255 256 wsc->sc_flags |= WDSC_DMA_ACTIVE; 257 258 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 259 0, wsc->sc_dmamap->dm_mapsize, 260 (dsc->sc_flags & HPCDMA_READ) ? 261 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 262 263 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 264 265 return wsc->sc_dmamap->dm_mapsize; 266 } 267 268 /* 269 * Stop DMA and unload active DMA maps 270 */ 271 void 272 wdsc_dmastop(struct wd33c93_softc *sc) 273 { 274 struct wdsc_softc *wsc = (struct wdsc_softc *)sc; 275 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 276 277 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 278 if (dsc->sc_flags & HPCDMA_READ) 279 hpcdma_flush(dsc); 280 hpcdma_cntl(dsc, 0); /* Stop DMA */ 281 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 282 0, wsc->sc_dmamap->dm_mapsize, 283 (dsc->sc_flags & HPCDMA_READ) ? 284 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 285 } 286 if (wsc->sc_flags & WDSC_DMA_MAPLOADED) 287 bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap); 288 wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED); 289 } 290 291 /* 292 * Reset the controller. 293 */ 294 void 295 wdsc_reset(struct wd33c93_softc *sc) 296 { 297 struct wdsc_softc *wsc = (struct wdsc_softc *)sc; 298 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 299 300 hpcdma_reset(dsc); 301 } 302 303 /* 304 * WD33c93 SCSI controller interrupt 305 */ 306 int 307 wdsc_scsiintr(void *arg) 308 { 309 struct wdsc_softc *wsc = arg; 310 struct wd33c93_softc *sc = &wsc->sc_wd33c93; 311 int found; 312 313 found = wd33c93_intr(sc); 314 if (found) 315 wsc->sc_intrcnt.ev_count++; 316 return found; 317 } 318
Indexes created Sat Sep 20 22:09:52 GMT 2025