atzsc.c revision 1.6
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 1.6 1994/07/16 19:45:44 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 /* 147 * If the users kva space is not ztwo try and allocate a bounce buffer. 148 * XXX this needs to change if we move to multiple memory segments. 149 */ 150 if (kvtop(sc) & sc->sc_dmamask) { 151 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS); 152 if (isztwomem(sc->sc_dmabuffer)) 153 printf(" bounce pa 0x%x", ztwopa(sc->sc_dmabuffer)); 154 else if (sc->sc_dmabuffer) 155 printf(" bounce pa 0x%x", 156 PREP_DMA_MEM(sc->sc_dmabuffer)); 157 } 158 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 159 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 160 161 printf(": dmamask 0x%x\n", ~sc->sc_dmamask); 162 163 sbicreset(sc); 164 165 sc->sc_link.adapter_softc = sc; 166 sc->sc_link.adapter_targ = 7; 167 sc->sc_link.adapter = &atzsc_scsiswitch; 168 sc->sc_link.device = &atzsc_scsidev; 169 TAILQ_INIT(&sc->sc_xslist); 170 171 custom.intreq = INTF_PORTS; 172 custom.intena = INTF_SETCLR | INTF_PORTS; 173 174 /* 175 * attach all scsi units on us 176 */ 177 config_found(dp, &sc->sc_link, atzscprint); 178 } 179 180 /* 181 * print diag if pnp is NULL else just extra 182 */ 183 int 184 atzscprint(auxp, pnp) 185 void *auxp; 186 char *pnp; 187 { 188 if (pnp == NULL) 189 return(UNCONF); 190 return(QUIET); 191 } 192 193 194 void 195 atzsc_dmafree(dev) 196 struct sbic_softc *dev; 197 { 198 volatile struct sdmac *sdp; 199 int s; 200 201 sdp = dev->sc_cregs; 202 203 s = splbio(); 204 #ifdef DEBUG 205 dev->sc_dmatimo = 0; 206 #endif 207 if (dev->sc_dmacmd) { 208 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 209 /* 210 * only FLUSH if terminal count not enabled, 211 * and reading from peripheral 212 */ 213 sdp->FLUSH = 1; 214 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 215 ; 216 } 217 /* 218 * clear possible interrupt and stop dma 219 */ 220 sdp->CINT = 1; 221 sdp->SP_DMA = 1; 222 dev->sc_dmacmd = 0; 223 } 224 /* 225 * disable interrupts 226 */ 227 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 228 dev->sc_flags &= ~SBICF_INTR; 229 splx(s); 230 } 231 232 int 233 atzsc_dmago(dev, addr, count, flags) 234 struct sbic_softc *dev; 235 char *addr; 236 int count, flags; 237 { 238 volatile struct sdmac *sdp; 239 240 sdp = dev->sc_cregs; 241 /* 242 * Set up the command word based on flags 243 */ 244 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 245 if ((flags & DMAGO_READ) == 0) 246 dev->sc_dmacmd |= CNTR_DDIR; 247 #ifdef DEBUG 248 if (atzsc_dmadebug & DDB_IO) 249 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 250 dev->sc_dmatimo = 1; 251 #endif 252 253 dev->sc_flags |= SBICF_INTR; 254 sdp->CNTR = dev->sc_dmacmd; 255 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 256 sdp->ST_DMA = 1; 257 258 return(dev->sc_tcnt); 259 } 260 261 void 262 atzsc_dmastop(dev) 263 struct sbic_softc *dev; 264 { 265 volatile struct sdmac *sdp; 266 int s; 267 268 sdp = dev->sc_cregs; 269 270 #ifdef DEBUG 271 if (atzsc_dmadebug & DDB_FOLLOW) 272 printf("atzsc_dmastop()\n"); 273 dev->sc_dmatimo = 0; 274 #endif 275 if (dev->sc_dmacmd) { 276 s = splbio(); 277 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 278 /* 279 * only FLUSH if terminal count not enabled, 280 * and reading from peripheral 281 */ 282 sdp->FLUSH = 1; 283 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 284 ; 285 } 286 /* 287 * clear possible interrupt and stop dma 288 */ 289 sdp->CINT = 1; 290 sdp->SP_DMA = 1; 291 dev->sc_dmacmd = 0; 292 splx(s); 293 } 294 } 295 296 int 297 atzsc_dmaintr() 298 { 299 volatile struct sdmac *sdp; 300 struct sbic_softc *dev; 301 int i, stat, found; 302 303 found = 0; 304 for (i = 0; i < atzsccd.cd_ndevs; i++) { 305 dev = atzsccd.cd_devs[i]; 306 if (dev == NULL) 307 continue; 308 sdp = dev->sc_cregs; 309 stat = sdp->ISTR; 310 311 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 312 continue; 313 314 #ifdef DEBUG 315 if (atzsc_dmadebug & DDB_FOLLOW) 316 printf("atzsc_dmaintr (%d, 0x%x)\n", i, stat); 317 #endif 318 319 /* 320 * both, SCSI and DMA interrupts arrive here. I chose 321 * arbitrarily that DMA interrupts should have higher 322 * precedence than SCSI interrupts. 323 */ 324 if (stat & ISTR_E_INT) { 325 found++; 326 327 sdp->CINT = 1; /* clear possible interrupt */ 328 329 /* 330 * check for SCSI ints in the same go and 331 * eventually save an interrupt 332 */ 333 } 334 335 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 336 found += sbicintr(dev); 337 } 338 return(found); 339 } 340 341 342 int 343 atzsc_dmanext(dev) 344 struct sbic_softc *dev; 345 { 346 volatile struct sdmac *sdp; 347 int i, stat; 348 349 sdp = dev->sc_cregs; 350 351 if (dev->sc_cur > dev->sc_last) { 352 /* shouldn't happen !! */ 353 printf("atzsc_dmanext at end !!!\n"); 354 atzsc_dmastop(dev); 355 return(0); 356 } 357 #ifdef DEBUG 358 dev->sc_dmatimo = 1; 359 #endif 360 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 361 /* 362 * only FLUSH if terminal count not enabled, 363 * and reading from peripheral 364 */ 365 sdp->FLUSH = 1; 366 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 367 ; 368 } 369 /* 370 * clear possible interrupt and stop dma 371 */ 372 sdp->CINT = 1; /* clear possible interrupt */ 373 sdp->SP_DMA = 1; /* stop dma */ 374 sdp->CNTR = dev->sc_dmacmd; 375 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 376 sdp->ST_DMA = 1; 377 378 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 379 return(dev->sc_tcnt); 380 } 381 382 #ifdef DEBUG 383 /*ARGSUSED*/ 384 void 385 atzsc_dmatimeout(arg) 386 void *arg; 387 { 388 struct sbic_softc *dev; 389 int i, s; 390 391 for (i = 0; i < atzsccd.cd_ndevs; i++) { 392 dev = atzsccd.cd_devs[i]; 393 if (dev == NULL) 394 continue; 395 396 s = splbio(); 397 if (dev->sc_dmatimo) { 398 if (dev->sc_dmatimo > 1) 399 printf("atzsc_dma%d: timeout #%d\n", 400 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 401 dev->sc_dmatimo++; 402 } 403 splx(s); 404 } 405 timeout(atzsc_dmatimeout, 0, 30 * hz); 406 } 407 #endif 408
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