wdsc.c revision 1.14
1 /* $NetBSD: wdsc.c,v 1.14 1998/12/05 19:43:43 mjacob 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.scsipi_scsi.max_lun = 7; 140 sc->sc_link.type = BUS_SCSI; 141 142 printf(": WD33C93 SCSI, target %d\n", 143 sc->sc_link.scsipi_scsi.adapter_target); 144 145 sc->sc_cregs = (volatile void *)sys_pcc; 146 sc->sc_sbicp = (sbic_regmap_p) PCC_VADDR(pa->pa_offset); 147 148 /* 149 * Eveything is a valid dma address. 150 */ 151 sc->sc_dmamask = 0; 152 153 /* 154 * The onboard WD33C93 of the '147 is usually clocked at 10MHz... 155 * (We use 10 times this for accuracy in later calculations) 156 */ 157 sc->sc_clkfreq = 100; 158 159 /* 160 * Initialise the hardware 161 */ 162 sbicinit(sc); 163 164 /* 165 * Fix up the interrupts 166 */ 167 sc->sc_ipl = pa->pa_ipl & PCC_IMASK; 168 169 sys_pcc->scsi_int = sc->sc_ipl | PCC_ICLEAR; 170 sys_pcc->dma_int = sc->sc_ipl | PCC_ICLEAR; 171 sys_pcc->dma_csr = 0; 172 173 pccintr_establish(PCCV_SCSID, wdsc_dmaintr, sc->sc_ipl, sc); 174 pccintr_establish(PCCV_SCSIP, wdsc_scsiintr, sc->sc_ipl, sc); 175 176 sys_pcc->scsi_int = sc->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 177 178 /* 179 * Attach all scsi units on us, watching for boot device 180 * (see dk_establish). 181 */ 182 tmp = bootpart; 183 if (PCC_PADDR(pa->pa_offset) != bootaddr) 184 bootpart = -1; /* invalid flag to dk_establish */ 185 (void)config_found(dp, &sc->sc_link, scsiprint); 186 bootpart = tmp; /* restore old value */ 187 } 188 189 /* 190 * Enable DMA interrupts 191 */ 192 void 193 wdsc_enintr(dev) 194 struct sbic_softc *dev; 195 { 196 volatile struct pcc *pc = dev->sc_cregs; 197 198 dev->sc_flags |= SBICF_INTR; 199 200 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 201 } 202 203 /* 204 * Prime the hardware for a DMA transfer 205 */ 206 int 207 wdsc_dmago(dev, addr, count, flags) 208 struct sbic_softc *dev; 209 char *addr; 210 int count, flags; 211 { 212 volatile struct pcc *pc = dev->sc_cregs; 213 214 /* 215 * Set up the command word based on flags 216 */ 217 if ( (flags & DMAGO_READ) == 0 ) 218 dev->sc_dmacmd = DMAC_CSR_ENABLE | DMAC_CSR_WRITE; 219 else 220 dev->sc_dmacmd = DMAC_CSR_ENABLE; 221 222 dev->sc_flags |= SBICF_INTR; 223 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 224 225 /* 226 * Prime the hardware. 227 * Note, it's probably not necessary to do this here, since dmanext 228 * is called just prior to the actual transfer. 229 */ 230 pc->dma_csr = 0; 231 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 232 pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr; 233 pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24); 234 pc->dma_csr = dev->sc_dmacmd; 235 236 return(dev->sc_tcnt); 237 } 238 239 /* 240 * Prime the hardware for the next DMA transfer 241 */ 242 int 243 wdsc_dmanext(dev) 244 struct sbic_softc *dev; 245 { 246 volatile struct pcc *pc = dev->sc_cregs; 247 248 if ( dev->sc_cur > dev->sc_last ) { 249 /* 250 * Shouldn't happen !! 251 */ 252 printf("wdsc_dmanext at end !!!\n"); 253 wdsc_dmastop(dev); 254 return(0); 255 } 256 257 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 258 259 /* 260 * Load the next DMA address 261 */ 262 pc->dma_csr = 0; 263 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 264 pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr; 265 pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24); 266 pc->dma_csr = dev->sc_dmacmd; 267 268 return(dev->sc_tcnt); 269 } 270 271 /* 272 * Stop DMA, and disable interrupts 273 */ 274 void 275 wdsc_dmastop(dev) 276 struct sbic_softc *dev; 277 { 278 volatile struct pcc *pc = dev->sc_cregs; 279 int s; 280 281 s = splbio(); 282 283 pc->dma_csr = 0; 284 pc->dma_int = dev->sc_ipl | PCC_ICLEAR; 285 286 splx(s); 287 } 288 289 /* 290 * Come here following a DMA interrupt 291 */ 292 int 293 wdsc_dmaintr(arg) 294 void *arg; 295 { 296 struct sbic_softc *dev = arg; 297 volatile struct pcc *pc = dev->sc_cregs; 298 int found = 0; 299 300 /* 301 * Really a DMA interrupt? 302 */ 303 if ( (pc->dma_int & 0x80) == 0 ) 304 return(0); 305 306 /* 307 * Was it a completion interrupt? 308 * XXXSCW Note: Support for other DMA interrupts is required, eg. buserr 309 */ 310 if ( pc->dma_csr & DMAC_CSR_DONE ) { 311 ++found; 312 313 pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 314 } 315 316 return(found); 317 } 318 319 /* 320 * Come here for SCSI interrupts 321 */ 322 int 323 wdsc_scsiintr(arg) 324 void *arg; 325 { 326 struct sbic_softc *dev = arg; 327 volatile struct pcc *pc = dev->sc_cregs; 328 int found; 329 330 /* 331 * Really a SCSI interrupt? 332 */ 333 if ( (pc->scsi_int & 0x80) == 0 ) 334 return(0); 335 336 /* 337 * Go handle it 338 */ 339 found = sbicintr(dev); 340 341 /* 342 * Acknowledge and clear the interrupt 343 */ 344 pc->scsi_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; 345 346 return(found); 347 } 348
Indexes created Tue Sep 30 20:09:53 GMT 2025