1 /* $NetBSD: wdsc.c,v 1.34 2015/02/18 16:47:58 macallan 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 1.34 2015/02/18 16:47:58 macallan 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 if (platform.badaddr((void *)reset, sizeof(reset))) 109 return 0; 110 111 *(volatile uint32_t *)reset = haa->hpc_regs->scsi_dmactl_reset; 112 delay(1000); 113 *(volatile uint32_t *)reset = 0x0; 114 115 if (platform.badaddr((void *)asr, sizeof(asr))) 116 return 0; 117 118 reg = *(volatile uint32_t *)asr; 119 if (haa->hpc_regs->revision == 3) { 120 if ((reg & 0xff) == SBIC_ASR_INT) 121 return 1; 122 } else { 123 if (((reg >> 8) & 0xff) == SBIC_ASR_INT) 124 return 1; 125 } 126 } 127 128 return 0; 129 } 130 131 /* 132 * Attach the wdsc driver 133 */ 134 void 135 wdsc_attach(device_t parent, device_t self, void *aux) 136 { 137 struct wdsc_softc *wsc = device_private(self); 138 struct wd33c93_softc *sc = &wsc->sc_wd33c93; 139 struct hpc_attach_args *haa = aux; 140 int err; 141 142 sc->sc_dev = self; 143 sc->sc_regt = haa->ha_st; 144 wsc->sc_dmat = haa->ha_dmat; 145 146 wsc->sc_hpcdma.hpc = haa->hpc_regs; 147 148 if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh, 149 haa->ha_devoff + 0 + 3, 1, &sc->sc_asr_regh)) != 0) { 150 printf(": unable to map asr reg, err=%d\n", err); 151 return; 152 } 153 154 if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh, 155 haa->ha_devoff + 4 + 3, 1, &sc->sc_data_regh)) != 0) { 156 printf(": unable to map data reg, err=%d\n", err); 157 return; 158 } 159 160 if (bus_dmamap_create(wsc->sc_dmat, MAXPHYS, 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, &wsc->sc_dmamap) != 0) { 165 printf(": failed to create dmamap\n"); 166 return; 167 } 168 169 sc->sc_dmasetup = wdsc_dmasetup; 170 sc->sc_dmago = wdsc_dmago; 171 sc->sc_dmastop = wdsc_dmastop; 172 sc->sc_reset = wdsc_reset; 173 174 sc->sc_adapter.adapt_request = wd33c93_scsi_request; 175 sc->sc_adapter.adapt_minphys = minphys; 176 177 sc->sc_id = 0; /* Host ID = 0 */ 178 sc->sc_clkfreq = 200; /* 20MHz */ 179 sc->sc_dmamode = SBIC_CTL_BURST_DMA; 180 181 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 182 device_xname(sc->sc_dev), "intr"); 183 184 if ((cpu_intr_establish(haa->ha_irq, IPL_BIO, 185 wdsc_scsiintr, wsc)) == NULL) { 186 printf(": unable to establish interrupt!\n"); 187 return; 188 } 189 190 hpcdma_init(haa, &wsc->sc_hpcdma, wsc->sc_hpcdma.hpc->scsi_dma_segs); 191 wd33c93_attach(sc); 192 } 193 194 /* 195 * Prime the hardware for a DMA transfer 196 * 197 * Requires splbio() interrupts to be disabled by the caller 198 */ 199 int 200 wdsc_dmasetup(struct wd33c93_softc *sc, void **addr, size_t *len, int datain, 201 size_t *dmasize) 202 { 203 struct wdsc_softc *wsc = (struct wdsc_softc *)sc; 204 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 205 int count, err; 206 void *vaddr; 207 208 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 209 210 vaddr = *addr; 211 count = dsc->sc_dlen = *len; 212 if (count) { 213 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 214 215 /* Build list of physical addresses for this transfer */ 216 if ((err = bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 217 vaddr, count, NULL /* kernel address */, 218 BUS_DMA_NOWAIT)) != 0) 219 panic("%s: bus_dmamap_load err=%d", 220 device_xname(sc->sc_dev), err); 221 222 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 223 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 224 225 if (datain) { 226 dsc->sc_dmacmd = 227 wsc->sc_hpcdma.hpc->scsi_dma_datain_cmd; 228 dsc->sc_flags |= HPCDMA_READ; 229 } else { 230 dsc->sc_dmacmd = 231 wsc->sc_hpcdma.hpc->scsi_dma_dataout_cmd; 232 dsc->sc_flags &= ~HPCDMA_READ; 233 } 234 } 235 return count; 236 } 237 238 /* 239 * Prime the hardware for the next DMA transfer 240 */ 241 int 242 wdsc_dmago(struct wd33c93_softc *sc) 243 { 244 struct wdsc_softc *wsc = (struct wdsc_softc *)sc; 245 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 246 247 if (dsc->sc_dlen == 0) 248 return 0; 249 250 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 251 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 252 253 wsc->sc_flags |= WDSC_DMA_ACTIVE; 254 255 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 256 0, wsc->sc_dmamap->dm_mapsize, 257 (dsc->sc_flags & HPCDMA_READ) ? 258 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 259 260 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 261 262 return wsc->sc_dmamap->dm_mapsize; 263 } 264 265 /* 266 * Stop DMA and unload active DMA maps 267 */ 268 void 269 wdsc_dmastop(struct wd33c93_softc *sc) 270 { 271 struct wdsc_softc *wsc = (struct wdsc_softc *)sc; 272 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 273 274 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 275 if (dsc->sc_flags & HPCDMA_READ) 276 hpcdma_flush(dsc); 277 hpcdma_cntl(dsc, 0); /* Stop DMA */ 278 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 279 0, wsc->sc_dmamap->dm_mapsize, 280 (dsc->sc_flags & HPCDMA_READ) ? 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 *sc) 293 { 294 struct wdsc_softc *wsc = (struct wdsc_softc *)sc; 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 wdsc_softc *wsc = arg; 307 struct wd33c93_softc *sc = &wsc->sc_wd33c93; 308 int found; 309 310 found = wd33c93_intr(sc); 311 if (found) 312 wsc->sc_intrcnt.ev_count++; 313 return found; 314 } 315