atzsc.c revision 1.5
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 1.5 1994/07/02 21:15:10 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 = 0; 136 137 #ifdef DEBUG 138 /* make sure timeout is really not needed */ 139 timeout(atzsc_dmatimeout, 0, 30 * hz); 140 #endif 141 /* 142 * only 24 bit mem. 143 */ 144 sc->sc_flags |= SBICF_BADDMA; 145 sc->sc_dmamask = ~0x00ffffff; 146 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 147 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 148 149 printf(": dmamask 0x%x\n", ~sc->sc_dmamask); 150 151 sbicreset(sc); 152 153 sc->sc_link.adapter_softc = sc; 154 sc->sc_link.adapter_targ = 7; 155 sc->sc_link.adapter = &atzsc_scsiswitch; 156 sc->sc_link.device = &atzsc_scsidev; 157 TAILQ_INIT(&sc->sc_xslist); 158 159 custom.intreq = INTF_PORTS; 160 custom.intena = INTF_SETCLR | INTF_PORTS; 161 162 /* 163 * attach all scsi units on us 164 */ 165 config_found(dp, &sc->sc_link, atzscprint); 166 } 167 168 /* 169 * print diag if pnp is NULL else just extra 170 */ 171 int 172 atzscprint(auxp, pnp) 173 void *auxp; 174 char *pnp; 175 { 176 if (pnp == NULL) 177 return(UNCONF); 178 return(QUIET); 179 } 180 181 182 void 183 atzsc_dmafree(dev) 184 struct sbic_softc *dev; 185 { 186 volatile struct sdmac *sdp; 187 int s; 188 189 sdp = dev->sc_cregs; 190 191 s = splbio(); 192 #ifdef DEBUG 193 dev->sc_dmatimo = 0; 194 #endif 195 if (dev->sc_dmacmd) { 196 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 197 /* 198 * only FLUSH if terminal count not enabled, 199 * and reading from peripheral 200 */ 201 sdp->FLUSH = 1; 202 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 203 ; 204 } 205 /* 206 * clear possible interrupt and stop dma 207 */ 208 sdp->CINT = 1; 209 sdp->SP_DMA = 1; 210 dev->sc_dmacmd = 0; 211 } 212 /* 213 * disable interrupts 214 */ 215 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 216 dev->sc_flags &= ~SBICF_INTR; 217 splx(s); 218 } 219 220 int 221 atzsc_dmago(dev, addr, count, flags) 222 struct sbic_softc *dev; 223 char *addr; 224 int count, flags; 225 { 226 volatile struct sdmac *sdp; 227 228 sdp = dev->sc_cregs; 229 /* 230 * Set up the command word based on flags 231 */ 232 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 233 if ((flags & DMAGO_READ) == 0) 234 dev->sc_dmacmd |= CNTR_DDIR; 235 #ifdef DEBUG 236 if (atzsc_dmadebug & DDB_IO) 237 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 238 dev->sc_dmatimo = 1; 239 #endif 240 241 dev->sc_flags |= SBICF_INTR; 242 sdp->CNTR = dev->sc_dmacmd; 243 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 244 sdp->ST_DMA = 1; 245 246 return(dev->sc_tcnt); 247 } 248 249 void 250 atzsc_dmastop(dev) 251 struct sbic_softc *dev; 252 { 253 volatile struct sdmac *sdp; 254 int s; 255 256 sdp = dev->sc_cregs; 257 258 #ifdef DEBUG 259 if (atzsc_dmadebug & DDB_FOLLOW) 260 printf("atzsc_dmastop()\n"); 261 dev->sc_dmatimo = 0; 262 #endif 263 if (dev->sc_dmacmd) { 264 s = splbio(); 265 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 266 /* 267 * only FLUSH if terminal count not enabled, 268 * and reading from peripheral 269 */ 270 sdp->FLUSH = 1; 271 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 272 ; 273 } 274 /* 275 * clear possible interrupt and stop dma 276 */ 277 sdp->CINT = 1; 278 sdp->SP_DMA = 1; 279 dev->sc_dmacmd = 0; 280 splx(s); 281 } 282 } 283 284 int 285 atzsc_dmaintr() 286 { 287 volatile struct sdmac *sdp; 288 struct sbic_softc *dev; 289 int i, stat, found; 290 291 found = 0; 292 for (i = 0; i < atzsccd.cd_ndevs; i++) { 293 dev = atzsccd.cd_devs[i]; 294 if (dev == NULL) 295 continue; 296 sdp = dev->sc_cregs; 297 stat = sdp->ISTR; 298 299 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 300 continue; 301 302 #ifdef DEBUG 303 if (atzsc_dmadebug & DDB_FOLLOW) 304 printf("atzsc_dmaintr (%d, 0x%x)\n", i, stat); 305 #endif 306 307 /* 308 * both, SCSI and DMA interrupts arrive here. I chose 309 * arbitrarily that DMA interrupts should have higher 310 * precedence than SCSI interrupts. 311 */ 312 if (stat & ISTR_E_INT) { 313 found++; 314 315 sdp->CINT = 1; /* clear possible interrupt */ 316 317 /* 318 * check for SCSI ints in the same go and 319 * eventually save an interrupt 320 */ 321 } 322 323 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 324 found += sbicintr(dev); 325 } 326 return(found); 327 } 328 329 330 int 331 atzsc_dmanext(dev) 332 struct sbic_softc *dev; 333 { 334 volatile struct sdmac *sdp; 335 int i, stat; 336 337 sdp = dev->sc_cregs; 338 339 if (dev->sc_cur > dev->sc_last) { 340 /* shouldn't happen !! */ 341 printf("atzsc_dmanext at end !!!\n"); 342 atzsc_dmastop(dev); 343 return(0); 344 } 345 #ifdef DEBUG 346 dev->sc_dmatimo = 1; 347 #endif 348 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 349 /* 350 * only FLUSH if terminal count not enabled, 351 * and reading from peripheral 352 */ 353 sdp->FLUSH = 1; 354 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 355 ; 356 } 357 /* 358 * clear possible interrupt and stop dma 359 */ 360 sdp->CINT = 1; /* clear possible interrupt */ 361 sdp->SP_DMA = 1; /* stop dma */ 362 sdp->CNTR = dev->sc_dmacmd; 363 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 364 sdp->ST_DMA = 1; 365 366 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 367 return(dev->sc_tcnt); 368 } 369 370 #ifdef DEBUG 371 /*ARGSUSED*/ 372 void 373 atzsc_dmatimeout(arg) 374 void *arg; 375 { 376 struct sbic_softc *dev; 377 int i, s; 378 379 for (i = 0; i < atzsccd.cd_ndevs; i++) { 380 dev = atzsccd.cd_devs[i]; 381 if (dev == NULL) 382 continue; 383 384 s = splbio(); 385 if (dev->sc_dmatimo) { 386 if (dev->sc_dmatimo > 1) 387 printf("atzsc_dma%d: timeout #%d\n", 388 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 389 dev->sc_dmatimo++; 390 } 391 splx(s); 392 } 393 timeout(atzsc_dmatimeout, 0, 30 * hz); 394 } 395 #endif 396
Indexes created Tue Sep 30 20:09:53 GMT 2025