atzsc.c revision 1.2
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 1.2 1994/05/11 19:06:41 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_dmamask = ~0x00ffffff; 145 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 146 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 147 148 printf(" dmamask 0x%x\n", ~sc->sc_dmamask); 149 150 sbicreset(sc); 151 152 sc->sc_link.adapter_softc = sc; 153 sc->sc_link.adapter_targ = 7; 154 sc->sc_link.adapter = &atzsc_scsiswitch; 155 sc->sc_link.device = &atzsc_scsidev; 156 TAILQ_INIT(&sc->sc_xslist); 157 158 custom.intreq = INTF_PORTS; 159 custom.intena = INTF_SETCLR | INTF_PORTS; 160 161 /* 162 * attach all scsi units on us 163 */ 164 config_found(dp, &sc->sc_link, atzscprint); 165 } 166 167 /* 168 * print diag if pnp is NULL else just extra 169 */ 170 int 171 atzscprint(auxp, pnp) 172 void *auxp; 173 char *pnp; 174 { 175 if (pnp == NULL) 176 return(UNCONF); 177 return(QUIET); 178 } 179 180 181 void 182 atzsc_dmafree(dev) 183 struct sbic_softc *dev; 184 { 185 volatile struct sdmac *sdp; 186 int s; 187 188 sdp = dev->sc_cregs; 189 190 s = splbio(); 191 #ifdef DEBUG 192 dev->sc_dmatimo = 0; 193 #endif 194 if (dev->sc_dmacmd) { 195 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 196 /* 197 * only FLUSH if terminal count not enabled, 198 * and reading from peripheral 199 */ 200 sdp->FLUSH = 1; 201 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 202 ; 203 } 204 /* 205 * clear possible interrupt and stop dma 206 */ 207 sdp->CINT = 1; 208 sdp->SP_DMA = 1; 209 dev->sc_dmacmd = 0; 210 } 211 /* 212 * disable interrupts 213 */ 214 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 215 dev->sc_flags &= ~SBICF_INTR; 216 splx(s); 217 } 218 219 int 220 atzsc_dmago(dev, addr, count, flags) 221 struct sbic_softc *dev; 222 char *addr; 223 int count, flags; 224 { 225 volatile struct sdmac *sdp; 226 227 sdp = dev->sc_cregs; 228 /* 229 * Set up the command word based on flags 230 */ 231 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 232 if ((flags & DMAGO_READ) == 0) 233 dev->sc_dmacmd |= CNTR_DDIR; 234 #ifdef DEBUG 235 if (atzsc_dmadebug & DDB_IO) 236 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 237 dev->sc_dmatimo = 1; 238 #endif 239 240 dev->sc_flags |= SBICF_INTR; 241 sdp->CNTR = dev->sc_dmacmd; 242 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 243 sdp->ST_DMA = 1; 244 245 return(dev->sc_tcnt); 246 } 247 248 void 249 atzsc_dmastop(dev) 250 struct sbic_softc *dev; 251 { 252 volatile struct sdmac *sdp; 253 int s; 254 255 sdp = dev->sc_cregs; 256 257 #ifdef DEBUG 258 if (atzsc_dmadebug & DDB_FOLLOW) 259 printf("atzsc_dmastop()\n"); 260 dev->sc_dmatimo = 0; 261 #endif 262 if (dev->sc_dmacmd) { 263 s = splbio(); 264 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 265 /* 266 * only FLUSH if terminal count not enabled, 267 * and reading from peripheral 268 */ 269 sdp->FLUSH = 1; 270 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 271 ; 272 } 273 /* 274 * clear possible interrupt and stop dma 275 */ 276 sdp->CINT = 1; 277 sdp->SP_DMA = 1; 278 dev->sc_dmacmd = 0; 279 splx(s); 280 } 281 } 282 283 int 284 atzsc_dmaintr() 285 { 286 volatile struct sdmac *sdp; 287 struct sbic_softc *dev; 288 int i, stat, found; 289 290 found = 0; 291 for (i = 0; i < atzsccd.cd_ndevs; i++) { 292 dev = atzsccd.cd_devs[i]; 293 if (dev == NULL) 294 continue; 295 sdp = dev->sc_cregs; 296 stat = sdp->ISTR; 297 298 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 299 continue; 300 301 #ifdef DEBUG 302 if (atzsc_dmadebug & DDB_FOLLOW) 303 printf("atzsc_dmaintr (%d, 0x%x)\n", i, stat); 304 #endif 305 306 /* 307 * both, SCSI and DMA interrupts arrive here. I chose 308 * arbitrarily that DMA interrupts should have higher 309 * precedence than SCSI interrupts. 310 */ 311 if (stat & ISTR_E_INT) { 312 found++; 313 314 sdp->CINT = 1; /* clear possible interrupt */ 315 316 /* 317 * check for SCSI ints in the same go and 318 * eventually save an interrupt 319 */ 320 } 321 322 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 323 found += sbicintr(i); 324 } 325 return(found); 326 } 327 328 329 int 330 atzsc_dmanext(dev) 331 struct sbic_softc *dev; 332 { 333 volatile struct sdmac *sdp; 334 int i, stat; 335 336 sdp = dev->sc_cregs; 337 338 if (dev->sc_cur > dev->sc_last) { 339 /* shouldn't happen !! */ 340 printf("atzsc_dmanext at end !!!\n"); 341 atzsc_dmastop(dev); 342 return(0); 343 } 344 #ifdef DEBUG 345 dev->sc_dmatimo = 1; 346 #endif 347 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 348 /* 349 * only FLUSH if terminal count not enabled, 350 * and reading from peripheral 351 */ 352 sdp->FLUSH = 1; 353 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 354 ; 355 } 356 /* 357 * clear possible interrupt and stop dma 358 */ 359 sdp->CINT = 1; /* clear possible interrupt */ 360 sdp->SP_DMA = 1; /* stop dma */ 361 sdp->CNTR = dev->sc_dmacmd; 362 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 363 sdp->ST_DMA = 1; 364 365 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 366 return(dev->sc_tcnt); 367 } 368 369 #ifdef DEBUG 370 /*ARGSUSED*/ 371 void 372 atzsc_dmatimeout(arg) 373 void *arg; 374 { 375 struct sbic_softc *dev; 376 int i, s; 377 378 for (i = 0; i < atzsccd.cd_ndevs; i++) { 379 dev = atzsccd.cd_devs[i]; 380 if (dev == NULL) 381 continue; 382 383 s = splbio(); 384 if (dev->sc_dmatimo) { 385 if (dev->sc_dmatimo > 1) 386 printf("atzsc_dma%d: timeout #%d\n", 387 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 388 dev->sc_dmatimo++; 389 } 390 splx(s); 391 } 392 timeout(atzsc_dmatimeout, 0, 30 * hz); 393 } 394 #endif 395
Indexes created Tue Sep 30 20:09:53 GMT 2025