atzsc.c revision 1.1
1 /* 2 * Copyright (c) 1994 Christian E. Hopps 3 * Copyright (c) 1982, 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)dma.c 35 * $Id: atzsc.c,v 1.1 1994/05/08 05:52:56 chopps Exp $ 36 */ 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 #include <scsi/scsi_all.h> 42 #include <scsi/scsiconf.h> 43 #include <amiga/amiga/custom.h> 44 #include <amiga/amiga/cc.h> 45 #include <amiga/amiga/device.h> 46 #include <amiga/dev/dmavar.h> 47 #include <amiga/dev/sbicreg.h> 48 #include <amiga/dev/sbicvar.h> 49 #include <amiga/dev/atzscreg.h> 50 #include <amiga/dev/ztwobusvar.h> 51 52 int atzscprint __P((void *auxp, char *)); 53 void atzscattach __P((struct device *, struct device *, void *)); 54 int atzscmatch __P((struct device *, struct cfdata *, void *)); 55 56 void atzsc_dmafree __P((struct sbic_softc *)); 57 void atzsc_dmastop __P((struct sbic_softc *)); 58 int atzsc_dmanext __P((struct sbic_softc *)); 59 int atzsc_dmaintr __P((void)); 60 int atzsc_dmago __P((struct sbic_softc *, char *, int, int)); 61 62 struct scsi_adapter atzsc_scsiswitch = { 63 sbic_scsicmd, 64 sbic_minphys, 65 0, /* no lun support */ 66 0, /* no lun support */ 67 sbic_adinfo, 68 "atzsc", 69 }; 70 71 struct scsi_device atzsc_scsidev = { 72 NULL, /* use default error handler */ 73 NULL, /* do not have a start functio */ 74 NULL, /* have no async handler */ 75 NULL, /* Use default done routine */ 76 "atzsc", 77 0, 78 }; 79 80 81 #ifdef DEBUG 82 void atzsc_dmatimeout __P((void *)); 83 int atzsc_dmadebug = 0; 84 #endif 85 86 struct cfdriver atzsccd = { 87 NULL, "atzsc", atzscmatch, atzscattach, 88 DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; 89 90 /* 91 * if we are an A3000 we are here. 92 */ 93 int 94 atzscmatch(pdp, cdp, auxp) 95 struct device *pdp; 96 struct cfdata *cdp; 97 void *auxp; 98 { 99 struct ztwobus_args *zap; 100 101 zap = auxp; 102 103 /* 104 * Check manufacturer and product id. 105 * I was informed that older boards can be 2 also. 106 */ 107 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 108 return(1); 109 else 110 return(0); 111 } 112 113 void 114 atzscattach(pdp, dp, auxp) 115 struct device *pdp, *dp; 116 void *auxp; 117 { 118 volatile struct sdmac *rp; 119 struct sbic_softc *sc; 120 struct ztwobus_args *zap; 121 122 zap = auxp; 123 124 sc = (struct sbic_softc *)dp; 125 sc->sc_cregs = rp = zap->va; 126 /* 127 * disable ints and reset bank register 128 */ 129 rp->CNTR = CNTR_PDMD; 130 rp->DAWR = DAWR_ATZSC; 131 sc->sc_dmafree = atzsc_dmafree; 132 sc->sc_dmago = atzsc_dmago; 133 sc->sc_dmanext = atzsc_dmanext; 134 sc->sc_dmastop = atzsc_dmastop; 135 sc->sc_dmacmd = 0xFF000000; /* only ztwomem */ 136 137 #ifdef DEBUG 138 /* make sure timeout is really not needed */ 139 timeout(atzsc_dmatimeout, 0, 30 * hz); 140 #endif 141 /* 142 * eveything is a valid dma address 143 */ 144 sc->sc_dmamask = 0; 145 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 146 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 147 148 sbicreset(sc); 149 150 sc->sc_link.adapter_softc = sc; 151 sc->sc_link.adapter_targ = 7; 152 sc->sc_link.adapter = &atzsc_scsiswitch; 153 sc->sc_link.device = &atzsc_scsidev; 154 TAILQ_INIT(&sc->sc_xslist); 155 156 custom.intreq = INTF_PORTS; 157 custom.intena = INTF_SETCLR | INTF_PORTS; 158 159 /* 160 * attach all scsi units on us 161 */ 162 config_found(dp, &sc->sc_link, atzscprint); 163 } 164 165 /* 166 * print diag if pnp is NULL else just extra 167 */ 168 int 169 atzscprint(auxp, pnp) 170 void *auxp; 171 char *pnp; 172 { 173 if (pnp == NULL) 174 return(UNCONF); 175 return(QUIET); 176 } 177 178 179 void 180 atzsc_dmafree(dev) 181 struct sbic_softc *dev; 182 { 183 volatile struct sdmac *sdp; 184 int s; 185 186 sdp = dev->sc_cregs; 187 188 s = splbio(); 189 #ifdef DEBUG 190 dev->sc_dmatimo = 0; 191 #endif 192 if (dev->sc_dmacmd) { 193 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 194 /* 195 * only FLUSH if terminal count not enabled, 196 * and reading from peripheral 197 */ 198 sdp->FLUSH = 1; 199 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 200 ; 201 } 202 /* 203 * clear possible interrupt and stop dma 204 */ 205 sdp->CINT = 1; 206 sdp->SP_DMA = 1; 207 dev->sc_dmacmd = 0; 208 } 209 /* 210 * disable interrupts 211 */ 212 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 213 dev->sc_flags &= ~SBICF_INTR; 214 splx(s); 215 } 216 217 int 218 atzsc_dmago(dev, addr, count, flags) 219 struct sbic_softc *dev; 220 char *addr; 221 int count, flags; 222 { 223 volatile struct sdmac *sdp; 224 225 sdp = dev->sc_cregs; 226 /* 227 * Set up the command word based on flags 228 */ 229 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 230 if ((flags & DMAGO_READ) == 0) 231 dev->sc_dmacmd |= CNTR_DDIR; 232 #ifdef DEBUG 233 if (atzsc_dmadebug & DDB_IO) 234 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 235 dev->sc_dmatimo = 1; 236 #endif 237 238 dev->sc_flags |= SBICF_INTR; 239 sdp->CNTR = dev->sc_dmacmd; 240 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 241 sdp->ST_DMA = 1; 242 243 return(dev->sc_tcnt); 244 } 245 246 void 247 atzsc_dmastop(dev) 248 struct sbic_softc *dev; 249 { 250 volatile struct sdmac *sdp; 251 int s; 252 253 sdp = dev->sc_cregs; 254 255 #ifdef DEBUG 256 if (atzsc_dmadebug & DDB_FOLLOW) 257 printf("atzsc_dmastop()\n"); 258 dev->sc_dmatimo = 0; 259 #endif 260 if (dev->sc_dmacmd) { 261 s = splbio(); 262 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 263 /* 264 * only FLUSH if terminal count not enabled, 265 * and reading from peripheral 266 */ 267 sdp->FLUSH = 1; 268 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 269 ; 270 } 271 /* 272 * clear possible interrupt and stop dma 273 */ 274 sdp->CINT = 1; 275 sdp->SP_DMA = 1; 276 dev->sc_dmacmd = 0; 277 splx(s); 278 } 279 } 280 281 int 282 atzsc_dmaintr() 283 { 284 volatile struct sdmac *sdp; 285 struct sbic_softc *dev; 286 int i, stat, found; 287 288 found = 0; 289 for (i = 0; i < atzsccd.cd_ndevs; i++) { 290 dev = atzsccd.cd_devs[i]; 291 if (dev == NULL) 292 continue; 293 sdp = dev->sc_cregs; 294 stat = sdp->ISTR; 295 296 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 297 continue; 298 299 #ifdef DEBUG 300 if (atzsc_dmadebug & DDB_FOLLOW) 301 printf("atzsc_dmaintr (%d, 0x%x)\n", i, stat); 302 #endif 303 304 /* 305 * both, SCSI and DMA interrupts arrive here. I chose 306 * arbitrarily that DMA interrupts should have higher 307 * precedence than SCSI interrupts. 308 */ 309 if (stat & ISTR_E_INT) { 310 found++; 311 312 sdp->CINT = 1; /* clear possible interrupt */ 313 314 /* 315 * check for SCSI ints in the same go and 316 * eventually save an interrupt 317 */ 318 } 319 320 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 321 found += sbicintr(i); 322 } 323 return(found); 324 } 325 326 327 int 328 atzsc_dmanext(dev) 329 struct sbic_softc *dev; 330 { 331 volatile struct sdmac *sdp; 332 int i, stat; 333 334 sdp = dev->sc_cregs; 335 336 if (dev->sc_cur > dev->sc_last) { 337 /* shouldn't happen !! */ 338 printf("atzsc_dmanext at end !!!\n"); 339 atzsc_dmastop(dev); 340 return(0); 341 } 342 #ifdef DEBUG 343 dev->sc_dmatimo = 1; 344 #endif 345 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 346 /* 347 * only FLUSH if terminal count not enabled, 348 * and reading from peripheral 349 */ 350 sdp->FLUSH = 1; 351 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 352 ; 353 } 354 /* 355 * clear possible interrupt and stop dma 356 */ 357 sdp->CINT = 1; /* clear possible interrupt */ 358 sdp->SP_DMA = 1; /* stop dma */ 359 sdp->CNTR = dev->sc_dmacmd; 360 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 361 sdp->ST_DMA = 1; 362 363 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 364 return(dev->sc_tcnt); 365 } 366 367 #ifdef DEBUG 368 /*ARGSUSED*/ 369 void 370 atzsc_dmatimeout(arg) 371 void *arg; 372 { 373 struct sbic_softc *dev; 374 int i, s; 375 376 for (i = 0; i < atzsccd.cd_ndevs; i++) { 377 dev = atzsccd.cd_devs[i]; 378 if (dev == NULL) 379 continue; 380 381 s = splbio(); 382 if (dev->sc_dmatimo) { 383 if (dev->sc_dmatimo > 1) 384 printf("atzsc_dma%d: timeout #%d\n", 385 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 386 dev->sc_dmatimo++; 387 } 388 splx(s); 389 } 390 timeout(atzsc_dmatimeout, 0, 30 * hz); 391 } 392 #endif 393
Indexes created Tue Sep 30 20:09:53 GMT 2025