wdsc.c revision 1.13
1 /* $NetBSD: wdsc.c,v 1.13 1998/11/19 21:47:03 thorpej 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 * Define 'scsi_nosync = 0x00' to enable sync SCSI mode. 82 * This is untested as yet, use at your own risk... 83 */ 84 u_long scsi_nosync = 0xff; 85 int shift_nosync = 0; 86 87 /* 88 * Match for SCSI devices on the onboard WD33C93 chip 89 */ 90 int 91 wdsc_pcc_match(pdp, cf, auxp) 92 struct device *pdp; 93 struct cfdata *cf; 94 void *auxp; 95 { 96 struct pcc_attach_args *pa = auxp; 97 98 if (strcmp(pa->pa_name, wdsc_cd.cd_name)) 99 return (0); 100 101 pa->pa_ipl = cf->pcccf_ipl; 102 return (1); 103 } 104 105 /* 106 * Attach the wdsc driver 107 */ 108 void 109 wdsc_pcc_attach(pdp, dp, auxp) 110 struct device *pdp, *dp; 111 void *auxp; 112 { 113 struct sbic_softc *sc = (struct sbic_softc *)dp; 114 struct pcc_attach_args *pa = auxp; 115 static int attached = 0; 116 int tmp; 117 118 if ( attached ) 119 panic("wdsc: Driver already attached!"); 120 121 attached = 1; 122 123 sc->sc_enintr = wdsc_enintr; 124 sc->sc_dmago = wdsc_dmago; 125 sc->sc_dmanext = wdsc_dmanext; 126 sc->sc_dmastop = wdsc_dmastop; 127 sc->sc_dmacmd = 0; 128 129 sc->sc_adapter.scsipi_cmd = sbic_scsicmd; 130 sc->sc_adapter.scsipi_minphys = sbic_minphys; 131 132 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 133 sc->sc_link.adapter_softc = sc; 134 sc->sc_link.scsipi_scsi.adapter_target = 7; 135 sc->sc_link.adapter = &sc->sc_adapter; 136 sc->sc_link.device = &wdsc_scsidev; 137 sc->sc_link.openings = 2; 138 sc->sc_link.scsipi_scsi.max_target = 7; 139 sc->sc_link.type = BUS_SCSI; 140 141 printf(": WD33C93 SCSI, target %d\n", 142 sc->sc_link.scsipi_scsi.adapter_target); 143 144 sc->sc_cregs = (volatile void *)sys_pcc; 145 sc->sc_sbicp = (sbic_regmap_p) PCC_VADDR(pa->pa_offset); 146 147 /* 148 * Eveything is a valid dma address. 149 */ 150 sc->sc_dmamask = 0; 151 152 /* 153 * The onboard WD33C93 of the '147 is usually clocked at 10MHz... 154 * (We use 10 times this for accuracy in later calculations) 155 */ 156 sc->sc_clkfreq = 100; 157 158 /* 159 * Initialise the hardware 160 */ 161 sbicinit(sc); 162 163 /* 164 * Fix up the interrupts 165 */ 166 sc->sc_ipl = pa->pa_ipl & PCC_IMASK; 167 168 sys_pcc->scsi_int = sc->sc_ipl | PCC_ICLEAR; 169 sys_pcc->dma_int = sc->sc_ipl | PCC_ICLEAR; 170 sys_pcc->dma_csr = 0; 171 172 pccintr_establish(PCCV_SCSID, wdsc_dmaintr, sc->sc_ipl, sc); 173 pccintr_establish(PCCV_SCSIP, wdsc_scsiintr, sc->sc_ipl, sc); 174 175 sys_pcc->scsi_int = sc->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 176 177 /* 178 * Attach all scsi units on us, watching for boot device 179 * (see dk_establish). 180 */ 181 tmp = bootpart; 182 if (PCC_PADDR(pa->pa_offset) != bootaddr) 183 bootpart = -1; /* invalid flag to dk_establish */ 184 (void)config_found(dp, &sc->sc_link, scsiprint); 185 bootpart = tmp; /* restore old value */ 186 } 187 188 /* 189 * Enable DMA interrupts 190 */ 191 void 192 wdsc_enintr(dev) 193 struct sbic_softc *dev; 194 { 195 volatile struct pcc *pc = dev->sc_cregs; 196 197 dev->sc_flags |= SBICF_INTR; 198 199 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 200 } 201 202 /* 203 * Prime the hardware for a DMA transfer 204 */ 205 int 206 wdsc_dmago(dev, addr, count, flags) 207 struct sbic_softc *dev; 208 char *addr; 209 int count, flags; 210 { 211 volatile struct pcc *pc = dev->sc_cregs; 212 213 /* 214 * Set up the command word based on flags 215 */ 216 if ( (flags & DMAGO_READ) == 0 ) 217 dev->sc_dmacmd = DMAC_CSR_ENABLE | DMAC_CSR_WRITE; 218 else 219 dev->sc_dmacmd = DMAC_CSR_ENABLE; 220 221 dev->sc_flags |= SBICF_INTR; 222 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 223 224 /* 225 * Prime the hardware. 226 * Note, it's probably not necessary to do this here, since dmanext 227 * is called just prior to the actual transfer. 228 */ 229 pc->dma_csr = 0; 230 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 231 pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr; 232 pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24); 233 pc->dma_csr = dev->sc_dmacmd; 234 235 return(dev->sc_tcnt); 236 } 237 238 /* 239 * Prime the hardware for the next DMA transfer 240 */ 241 int 242 wdsc_dmanext(dev) 243 struct sbic_softc *dev; 244 { 245 volatile struct pcc *pc = dev->sc_cregs; 246 247 if ( dev->sc_cur > dev->sc_last ) { 248 /* 249 * Shouldn't happen !! 250 */ 251 printf("wdsc_dmanext at end !!!\n"); 252 wdsc_dmastop(dev); 253 return(0); 254 } 255 256 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 257 258 /* 259 * Load the next DMA address 260 */ 261 pc->dma_csr = 0; 262 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 263 pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr; 264 pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24); 265 pc->dma_csr = dev->sc_dmacmd; 266 267 return(dev->sc_tcnt); 268 } 269 270 /* 271 * Stop DMA, and disable interrupts 272 */ 273 void 274 wdsc_dmastop(dev) 275 struct sbic_softc *dev; 276 { 277 volatile struct pcc *pc = dev->sc_cregs; 278 int s; 279 280 s = splbio(); 281 282 pc->dma_csr = 0; 283 pc->dma_int = dev->sc_ipl | PCC_ICLEAR; 284 285 splx(s); 286 } 287 288 /* 289 * Come here following a DMA interrupt 290 */ 291 int 292 wdsc_dmaintr(arg) 293 void *arg; 294 { 295 struct sbic_softc *dev = arg; 296 volatile struct pcc *pc = dev->sc_cregs; 297 int found = 0; 298 299 /* 300 * Really a DMA interrupt? 301 */ 302 if ( (pc->dma_int & 0x80) == 0 ) 303 return(0); 304 305 /* 306 * Was it a completion interrupt? 307 * XXXSCW Note: Support for other DMA interrupts is required, eg. buserr 308 */ 309 if ( pc->dma_csr & DMAC_CSR_DONE ) { 310 ++found; 311 312 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 313 } 314 315 return(found); 316 } 317 318 /* 319 * Come here for SCSI interrupts 320 */ 321 int 322 wdsc_scsiintr(arg) 323 void *arg; 324 { 325 struct sbic_softc *dev = arg; 326 volatile struct pcc *pc = dev->sc_cregs; 327 int found; 328 329 /* 330 * Really a SCSI interrupt? 331 */ 332 if ( (pc->scsi_int & 0x80) == 0 ) 333 return(0); 334 335 /* 336 * Go handle it 337 */ 338 found = sbicintr(dev); 339 340 /* 341 * Acknowledge and clear the interrupt 342 */ 343 pc->scsi_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 344 345 return(found); 346 } 347
Indexes created Tue Sep 30 20:09:53 GMT 2025