wdsc.c revision 1.15
1 /* $NetBSD: wdsc.c,v 1.15 1999/02/20 00:12:02 scw Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Steve Woodford 5 * Copyright (c) 1982, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)wdsc.c 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 44 #include <dev/scsipi/scsi_all.h> 45 #include <dev/scsipi/scsipi_all.h> 46 #include <dev/scsipi/scsiconf.h> 47 48 #include <machine/autoconf.h> 49 50 #include <mvme68k/dev/dmavar.h> 51 #include <mvme68k/dev/pccreg.h> 52 #include <mvme68k/dev/pccvar.h> 53 #include <mvme68k/dev/sbicreg.h> 54 #include <mvme68k/dev/sbicvar.h> 55 #include <mvme68k/dev/wdscreg.h> 56 57 void wdsc_pcc_attach __P((struct device *, struct device *, void *)); 58 int wdsc_pcc_match __P((struct device *, struct cfdata *, void *)); 59 60 void wdsc_enintr __P((struct sbic_softc *)); 61 int wdsc_dmago __P((struct sbic_softc *, char *, int, int)); 62 int wdsc_dmanext __P((struct sbic_softc *)); 63 void wdsc_dmastop __P((struct sbic_softc *)); 64 int wdsc_dmaintr __P((void *)); 65 int wdsc_scsiintr __P((void *)); 66 67 struct scsipi_device wdsc_scsidev = { 68 NULL, /* use default error handler */ 69 NULL, /* do not have a start functio */ 70 NULL, /* have no async handler */ 71 NULL, /* Use default done routine */ 72 }; 73 74 struct cfattach wdsc_pcc_ca = { 75 sizeof(struct sbic_softc), wdsc_pcc_match, wdsc_pcc_attach 76 }; 77 78 extern struct cfdriver wdsc_cd; 79 80 81 /* 82 * Match for SCSI devices on the onboard WD33C93 chip 83 */ 84 int 85 wdsc_pcc_match(pdp, cf, auxp) 86 struct device *pdp; 87 struct cfdata *cf; 88 void *auxp; 89 { 90 struct pcc_attach_args *pa = auxp; 91 92 if (strcmp(pa->pa_name, wdsc_cd.cd_name)) 93 return (0); 94 95 pa->pa_ipl = cf->pcccf_ipl; 96 return (1); 97 } 98 99 /* 100 * Attach the wdsc driver 101 */ 102 void 103 wdsc_pcc_attach(pdp, dp, auxp) 104 struct device *pdp, *dp; 105 void *auxp; 106 { 107 struct sbic_softc *sc = (struct sbic_softc *)dp; 108 struct pcc_attach_args *pa = auxp; 109 static int attached = 0; 110 int tmp; 111 112 if ( attached ) 113 panic("wdsc: Driver already attached!"); 114 115 attached = 1; 116 117 sc->sc_enintr = wdsc_enintr; 118 sc->sc_dmago = wdsc_dmago; 119 sc->sc_dmanext = wdsc_dmanext; 120 sc->sc_dmastop = wdsc_dmastop; 121 sc->sc_dmacmd = 0; 122 123 sc->sc_adapter.scsipi_cmd = sbic_scsicmd; 124 sc->sc_adapter.scsipi_minphys = sbic_minphys; 125 126 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 127 sc->sc_link.adapter_softc = sc; 128 sc->sc_link.scsipi_scsi.adapter_target = 7; 129 sc->sc_link.adapter = &sc->sc_adapter; 130 sc->sc_link.device = &wdsc_scsidev; 131 sc->sc_link.openings = 2; 132 sc->sc_link.scsipi_scsi.max_target = 7; 133 sc->sc_link.scsipi_scsi.max_lun = 7; 134 sc->sc_link.type = BUS_SCSI; 135 136 printf(": WD33C93 SCSI, target %d\n", 137 sc->sc_link.scsipi_scsi.adapter_target); 138 139 sc->sc_cregs = (volatile void *)sys_pcc; 140 sc->sc_sbicp = (sbic_regmap_p) PCC_VADDR(pa->pa_offset); 141 142 /* 143 * Eveything is a valid dma address. 144 */ 145 sc->sc_dmamask = 0; 146 147 /* 148 * The onboard WD33C93 of the '147 is usually clocked at 10MHz... 149 * (We use 10 times this for accuracy in later calculations) 150 */ 151 sc->sc_clkfreq = 100; 152 153 /* 154 * Initialise the hardware 155 */ 156 sbicinit(sc); 157 158 /* 159 * Fix up the interrupts 160 */ 161 sc->sc_ipl = pa->pa_ipl & PCC_IMASK; 162 163 sys_pcc->scsi_int = sc->sc_ipl | PCC_ICLEAR; 164 sys_pcc->dma_int = sc->sc_ipl | PCC_ICLEAR; 165 sys_pcc->dma_csr = 0; 166 167 pccintr_establish(PCCV_SCSID, wdsc_dmaintr, sc->sc_ipl, sc); 168 pccintr_establish(PCCV_SCSIP, wdsc_scsiintr, sc->sc_ipl, sc); 169 170 sys_pcc->scsi_int = sc->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 171 172 /* 173 * Attach all scsi units on us, watching for boot device 174 * (see dk_establish). 175 */ 176 tmp = bootpart; 177 if (PCC_PADDR(pa->pa_offset) != bootaddr) 178 bootpart = -1; /* invalid flag to dk_establish */ 179 (void)config_found(dp, &sc->sc_link, scsiprint); 180 bootpart = tmp; /* restore old value */ 181 } 182 183 /* 184 * Enable DMA interrupts 185 */ 186 void 187 wdsc_enintr(dev) 188 struct sbic_softc *dev; 189 { 190 volatile struct pcc *pc = dev->sc_cregs; 191 192 dev->sc_flags |= SBICF_INTR; 193 194 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 195 } 196 197 /* 198 * Prime the hardware for a DMA transfer 199 */ 200 int 201 wdsc_dmago(dev, addr, count, flags) 202 struct sbic_softc *dev; 203 char *addr; 204 int count, flags; 205 { 206 volatile struct pcc *pc = dev->sc_cregs; 207 208 /* 209 * Set up the command word based on flags 210 */ 211 if ( (flags & DMAGO_READ) == 0 ) 212 dev->sc_dmacmd = DMAC_CSR_ENABLE | DMAC_CSR_WRITE; 213 else 214 dev->sc_dmacmd = DMAC_CSR_ENABLE; 215 216 dev->sc_flags |= SBICF_INTR; 217 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 218 219 /* 220 * Prime the hardware. 221 * Note, it's probably not necessary to do this here, since dmanext 222 * is called just prior to the actual transfer. 223 */ 224 pc->dma_csr = 0; 225 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 226 pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr; 227 pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24); 228 pc->dma_csr = dev->sc_dmacmd; 229 230 return(dev->sc_tcnt); 231 } 232 233 /* 234 * Prime the hardware for the next DMA transfer 235 */ 236 int 237 wdsc_dmanext(dev) 238 struct sbic_softc *dev; 239 { 240 volatile struct pcc *pc = dev->sc_cregs; 241 242 if ( dev->sc_cur > dev->sc_last ) { 243 /* 244 * Shouldn't happen !! 245 */ 246 printf("wdsc_dmanext at end !!!\n"); 247 wdsc_dmastop(dev); 248 return(0); 249 } 250 251 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 252 253 /* 254 * Load the next DMA address 255 */ 256 pc->dma_csr = 0; 257 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 258 pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr; 259 pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24); 260 pc->dma_csr = dev->sc_dmacmd; 261 262 return(dev->sc_tcnt); 263 } 264 265 /* 266 * Stop DMA, and disable interrupts 267 */ 268 void 269 wdsc_dmastop(dev) 270 struct sbic_softc *dev; 271 { 272 volatile struct pcc *pc = dev->sc_cregs; 273 int s; 274 275 s = splbio(); 276 277 pc->dma_csr = 0; 278 pc->dma_int = dev->sc_ipl | PCC_ICLEAR; 279 280 splx(s); 281 } 282 283 /* 284 * Come here following a DMA interrupt 285 */ 286 int 287 wdsc_dmaintr(arg) 288 void *arg; 289 { 290 struct sbic_softc *dev = arg; 291 volatile struct pcc *pc = dev->sc_cregs; 292 int found = 0; 293 294 /* 295 * Really a DMA interrupt? 296 */ 297 if ( (pc->dma_int & 0x80) == 0 ) 298 return(0); 299 300 /* 301 * Was it a completion interrupt? 302 * XXXSCW Note: Support for other DMA interrupts is required, eg. buserr 303 */ 304 if ( pc->dma_csr & DMAC_CSR_DONE ) { 305 ++found; 306 307 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 308 } 309 310 return(found); 311 } 312 313 /* 314 * Come here for SCSI interrupts 315 */ 316 int 317 wdsc_scsiintr(arg) 318 void *arg; 319 { 320 struct sbic_softc *dev = arg; 321 volatile struct pcc *pc = dev->sc_cregs; 322 int found; 323 324 /* 325 * Really a SCSI interrupt? 326 */ 327 if ( (pc->scsi_int & 0x80) == 0 ) 328 return(0); 329 330 /* 331 * Go handle it 332 */ 333 found = sbicintr(dev); 334 335 /* 336 * Acknowledge and clear the interrupt 337 */ 338 pc->scsi_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 339 340 return(found); 341 } 342
Indexes created Wed Oct 22 13:09:56 GMT 2025