1 /* $NetBSD: wdsc.c,v 1.17 2006/10/01 22:02:55 bjh21 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 1.17 2006/10/01 22:02:55 bjh21 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 56 #include <sgimips/hpc/hpcvar.h> 57 #include <sgimips/hpc/hpcreg.h> 58 #include <sgimips/hpc/hpcdma.h> 59 60 #include <dev/ic/wd33c93reg.h> 61 #include <dev/ic/wd33c93var.h> 62 63 #include <opt_kgdb.h> 64 #include <sys/kgdb.h> 65 66 struct wdsc_softc { 67 struct wd33c93_softc sc_wd33c93; /* Must be first */ 68 struct evcnt sc_intrcnt; /* Interrupt counter */ 69 bus_dma_tag_t sc_dmat; 70 bus_dmamap_t sc_dmamap; 71 int sc_flags; 72 #define WDSC_DMA_ACTIVE 0x1 73 #define WDSC_DMA_MAPLOADED 0x2 74 struct hpc_dma_softc sc_hpcdma; 75 }; 76 77 78 void wdsc_attach (struct device *, struct device *, void *); 79 int wdsc_match (struct device *, struct cfdata *, void *); 80 81 CFATTACH_DECL(wdsc, sizeof(struct wdsc_softc), 82 wdsc_match, wdsc_attach, NULL, NULL); 83 84 int wdsc_dmasetup (struct wd33c93_softc *, caddr_t *,size_t *, 85 int, size_t *); 86 int wdsc_dmago (struct wd33c93_softc *); 87 void wdsc_dmastop (struct wd33c93_softc *); 88 void wdsc_reset (struct wd33c93_softc *); 89 int wdsc_dmaintr (void *); 90 int wdsc_scsiintr (void *); 91 92 /* 93 * Match for SCSI devices on the onboard WD33C93 chip 94 */ 95 int 96 wdsc_match(struct device *pdp, struct cfdata *cf, void *auxp) 97 { 98 struct hpc_attach_args *haa = auxp; 99 100 if (strcmp(haa->ha_name, cf->cf_name) == 0) 101 return (1); 102 103 return (0); 104 } 105 106 /* 107 * Attach the wdsc driver 108 */ 109 void 110 wdsc_attach(struct device *pdp, struct device *dp, void *auxp) 111 { 112 struct wd33c93_softc *sc = (void *)dp; 113 struct wdsc_softc *wsc = (void *)dp; 114 struct hpc_attach_args *haa = auxp; 115 int err; 116 117 sc->sc_regt = haa->ha_st; 118 wsc->sc_dmat = haa->ha_dmat; 119 120 wsc->sc_hpcdma.hpc = haa->hpc_regs; 121 122 if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh, 123 haa->ha_devoff, 124 wsc->sc_hpcdma.hpc->scsi0_devregs_size, 125 &sc->sc_regh)) != 0) { 126 printf(": unable to map regs, err=%d\n", err); 127 return; 128 } 129 130 if (bus_dmamap_create(wsc->sc_dmat, 131 wsc->sc_hpcdma.hpc->scsi_max_xfer, 132 wsc->sc_hpcdma.hpc->scsi_dma_segs, 133 wsc->sc_hpcdma.hpc->scsi_dma_segs_size, 134 wsc->sc_hpcdma.hpc->scsi_dma_segs_size, 135 BUS_DMA_WAITOK, 136 &wsc->sc_dmamap) != 0) { 137 printf(": failed to create dmamap\n"); 138 return; 139 } 140 141 sc->sc_dmasetup = wdsc_dmasetup; 142 sc->sc_dmago = wdsc_dmago; 143 sc->sc_dmastop = wdsc_dmastop; 144 sc->sc_reset = wdsc_reset; 145 146 sc->sc_adapter.adapt_request = wd33c93_scsi_request; 147 sc->sc_adapter.adapt_minphys = minphys; 148 149 sc->sc_id = 0; /* Host ID = 0 */ 150 sc->sc_clkfreq = wsc->sc_hpcdma.hpc->clk_freq; 151 sc->sc_dmamode = SBIC_CTL_DMA; 152 153 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 154 sc->sc_dev.dv_xname, "intr"); 155 156 if ((cpu_intr_establish(haa->ha_irq, IPL_BIO, 157 wdsc_scsiintr, sc)) == NULL) { 158 printf(": unable to establish interrupt!\n"); 159 return; 160 } 161 162 hpcdma_init(haa, &wsc->sc_hpcdma, wsc->sc_hpcdma.hpc->scsi_dma_segs); 163 wd33c93_attach(sc); 164 return; 165 } 166 167 /* 168 * Prime the hardware for a DMA transfer 169 * 170 * Requires splbio() interrupts to be disabled by the caller 171 */ 172 int 173 wdsc_dmasetup(struct wd33c93_softc *dev, caddr_t *addr, size_t *len, int datain, size_t *dmasize) 174 { 175 struct wdsc_softc *wsc = (void *)dev; 176 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 177 int count, err; 178 void *vaddr; 179 180 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 181 182 vaddr = *addr; 183 count = dsc->sc_dlen = *len; 184 if (count) { 185 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 186 187 /* Build list of physical addresses for this transfer */ 188 if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 189 vaddr, count, 190 NULL /* kernel address */, 191 BUS_DMA_NOWAIT)) != 0) 192 panic("%s: bus_dmamap_load err=%d", 193 dev->sc_dev.dv_xname, err); 194 195 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 196 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 197 198 if (datain) { 199 dsc->sc_dmacmd = wsc->sc_hpcdma.hpc->dma_datain_cmd; 200 dsc->sc_flags |= HPCDMA_READ; 201 } else { 202 dsc->sc_dmacmd = wsc->sc_hpcdma.hpc->dma_dataout_cmd; 203 dsc->sc_flags &= ~HPCDMA_READ; 204 } 205 } 206 return(count); 207 } 208 209 /* 210 * Prime the hardware for the next DMA transfer 211 */ 212 int 213 wdsc_dmago(struct wd33c93_softc *dev) 214 { 215 struct wdsc_softc *wsc = (void *)dev; 216 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 217 218 if (dsc->sc_dlen == 0) 219 return(0); 220 221 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 222 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 223 224 wsc->sc_flags |= WDSC_DMA_ACTIVE; 225 226 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 227 wsc->sc_dmamap->dm_mapsize, 228 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 229 230 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 231 232 return(wsc->sc_dmamap->dm_mapsize); 233 } 234 235 /* 236 * Stop DMA and unload active DMA maps 237 */ 238 void 239 wdsc_dmastop(struct wd33c93_softc *dev) 240 { 241 struct wdsc_softc *wsc = (void *)dev; 242 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 243 244 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 245 if (dsc->sc_flags & HPCDMA_READ) 246 hpcdma_flush(dsc); 247 hpcdma_cntl(dsc, 0); /* Stop DMA */ 248 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 249 wsc->sc_dmamap->dm_mapsize, 250 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 251 } 252 if (wsc->sc_flags & WDSC_DMA_MAPLOADED) 253 bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap); 254 wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED); 255 } 256 257 /* 258 * Reset the controller. 259 */ 260 void 261 wdsc_reset(struct wd33c93_softc *dev) 262 { 263 struct wdsc_softc *wsc = (void *)dev; 264 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 265 266 hpcdma_reset(dsc); 267 } 268 269 /* 270 * WD33c93 SCSI controller interrupt 271 */ 272 int 273 wdsc_scsiintr(void *arg) 274 { 275 struct wd33c93_softc *dev = arg; 276 struct wdsc_softc *wsc = arg; 277 int found; 278 279 found = wd33c93_intr(dev); 280 if (found) 281 wsc->sc_intrcnt.ev_count++; 282 return(found); 283 } 284