atzsc.c revision 1.10
1 /* $NetBSD: atzsc.c,v 1.10 1995/01/05 07:22:34 chopps Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 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 * @(#)dma.c 37 */ 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <scsi/scsi_all.h> 43 #include <scsi/scsiconf.h> 44 #include <amiga/amiga/custom.h> 45 #include <amiga/amiga/cc.h> 46 #include <amiga/amiga/device.h> 47 #include <amiga/dev/dmavar.h> 48 #include <amiga/dev/sbicreg.h> 49 #include <amiga/dev/sbicvar.h> 50 #include <amiga/dev/atzscreg.h> 51 #include <amiga/dev/zbusvar.h> 52 53 int atzscprint __P((void *auxp, char *)); 54 void atzscattach __P((struct device *, struct device *, void *)); 55 int atzscmatch __P((struct device *, struct cfdata *, void *)); 56 57 void atzsc_dmafree __P((struct sbic_softc *)); 58 void atzsc_dmastop __P((struct sbic_softc *)); 59 int atzsc_dmanext __P((struct sbic_softc *)); 60 int atzsc_dmaintr __P((void)); 61 int atzsc_dmago __P((struct sbic_softc *, char *, int, int)); 62 63 struct scsi_adapter atzsc_scsiswitch = { 64 sbic_scsicmd, 65 sbic_minphys, 66 0, /* no lun support */ 67 0, /* no lun support */ 68 }; 69 70 struct scsi_device atzsc_scsidev = { 71 NULL, /* use default error handler */ 72 NULL, /* do not have a start functio */ 73 NULL, /* have no async handler */ 74 NULL, /* Use default done routine */ 75 }; 76 77 78 #ifdef DEBUG 79 void atzsc_dmatimeout __P((void *)); 80 int atzsc_dmadebug = 0; 81 #endif 82 83 struct cfdriver atzsccd = { 84 NULL, "atzsc", (cfmatch_t)atzscmatch, atzscattach, 85 DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; 86 87 /* 88 * if we are an A3000 we are here. 89 */ 90 int 91 atzscmatch(pdp, cdp, auxp) 92 struct device *pdp; 93 struct cfdata *cdp; 94 void *auxp; 95 { 96 struct zbus_args *zap; 97 98 zap = auxp; 99 100 /* 101 * Check manufacturer and product id. 102 * I was informed that older boards can be 2 also. 103 */ 104 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 105 return(1); 106 else 107 return(0); 108 } 109 110 void 111 atzscattach(pdp, dp, auxp) 112 struct device *pdp, *dp; 113 void *auxp; 114 { 115 volatile struct sdmac *rp; 116 struct sbic_softc *sc; 117 struct zbus_args *zap; 118 119 zap = auxp; 120 121 sc = (struct sbic_softc *)dp; 122 sc->sc_cregs = rp = zap->va; 123 /* 124 * disable ints and reset bank register 125 */ 126 rp->CNTR = CNTR_PDMD; 127 rp->DAWR = DAWR_ATZSC; 128 sc->sc_dmafree = atzsc_dmafree; 129 sc->sc_dmago = atzsc_dmago; 130 sc->sc_dmanext = atzsc_dmanext; 131 sc->sc_dmastop = atzsc_dmastop; 132 sc->sc_dmacmd = 0; 133 134 #ifdef DEBUG 135 /* make sure timeout is really not needed */ 136 timeout(atzsc_dmatimeout, 0, 30 * hz); 137 #endif 138 /* 139 * only 24 bit mem. 140 */ 141 sc->sc_flags |= SBICF_BADDMA; 142 sc->sc_dmamask = ~0x00ffffff; 143 /* 144 * If the users kva space is not ztwo try and allocate a bounce buffer. 145 * XXX this needs to change if we move to multiple memory segments. 146 */ 147 if (kvtop(sc) & sc->sc_dmamask) { 148 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS); 149 if (isztwomem(sc->sc_dmabuffer)) 150 printf(" bounce pa 0x%x", ztwopa(sc->sc_dmabuffer)); 151 else if (sc->sc_dmabuffer) 152 printf(" bounce pa 0x%x", 153 PREP_DMA_MEM(sc->sc_dmabuffer)); 154 } 155 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 156 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 157 158 printf(": dmamask 0x%x\n", ~sc->sc_dmamask); 159 160 sbicreset(sc); 161 162 sc->sc_link.adapter_softc = sc; 163 sc->sc_link.adapter_target = 7; 164 sc->sc_link.adapter = &atzsc_scsiswitch; 165 sc->sc_link.device = &atzsc_scsidev; 166 sc->sc_link.openings = 1; 167 TAILQ_INIT(&sc->sc_xslist); 168 169 custom.intreq = INTF_PORTS; 170 custom.intena = INTF_SETCLR | INTF_PORTS; 171 172 /* 173 * attach all scsi units on us 174 */ 175 config_found(dp, &sc->sc_link, atzscprint); 176 } 177 178 /* 179 * print diag if pnp is NULL else just extra 180 */ 181 int 182 atzscprint(auxp, pnp) 183 void *auxp; 184 char *pnp; 185 { 186 if (pnp == NULL) 187 return(UNCONF); 188 return(QUIET); 189 } 190 191 192 void 193 atzsc_dmafree(dev) 194 struct sbic_softc *dev; 195 { 196 volatile struct sdmac *sdp; 197 int s; 198 199 sdp = dev->sc_cregs; 200 201 s = splbio(); 202 #ifdef DEBUG 203 dev->sc_dmatimo = 0; 204 #endif 205 if (dev->sc_dmacmd) { 206 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 207 /* 208 * only FLUSH if terminal count not enabled, 209 * and reading from peripheral 210 */ 211 sdp->FLUSH = 1; 212 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 213 ; 214 } 215 /* 216 * clear possible interrupt and stop dma 217 */ 218 sdp->CINT = 1; 219 sdp->SP_DMA = 1; 220 dev->sc_dmacmd = 0; 221 } 222 /* 223 * disable interrupts 224 */ 225 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 226 dev->sc_flags &= ~SBICF_INTR; 227 splx(s); 228 } 229 230 int 231 atzsc_dmago(dev, addr, count, flags) 232 struct sbic_softc *dev; 233 char *addr; 234 int count, flags; 235 { 236 volatile struct sdmac *sdp; 237 238 sdp = dev->sc_cregs; 239 /* 240 * Set up the command word based on flags 241 */ 242 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 243 if ((flags & DMAGO_READ) == 0) 244 dev->sc_dmacmd |= CNTR_DDIR; 245 #ifdef DEBUG 246 if (atzsc_dmadebug & DDB_IO) 247 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 248 dev->sc_dmatimo = 1; 249 #endif 250 251 dev->sc_flags |= SBICF_INTR; 252 sdp->CNTR = dev->sc_dmacmd; 253 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 254 sdp->ST_DMA = 1; 255 256 return(dev->sc_tcnt); 257 } 258 259 void 260 atzsc_dmastop(dev) 261 struct sbic_softc *dev; 262 { 263 volatile struct sdmac *sdp; 264 int s; 265 266 sdp = dev->sc_cregs; 267 268 #ifdef DEBUG 269 if (atzsc_dmadebug & DDB_FOLLOW) 270 printf("atzsc_dmastop()\n"); 271 dev->sc_dmatimo = 0; 272 #endif 273 if (dev->sc_dmacmd) { 274 s = splbio(); 275 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 276 /* 277 * only FLUSH if terminal count not enabled, 278 * and reading from peripheral 279 */ 280 sdp->FLUSH = 1; 281 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 282 ; 283 } 284 /* 285 * clear possible interrupt and stop dma 286 */ 287 sdp->CINT = 1; 288 sdp->SP_DMA = 1; 289 dev->sc_dmacmd = 0; 290 splx(s); 291 } 292 } 293 294 int 295 atzsc_dmaintr() 296 { 297 volatile struct sdmac *sdp; 298 struct sbic_softc *dev; 299 int i, stat, found; 300 301 found = 0; 302 for (i = 0; i < atzsccd.cd_ndevs; i++) { 303 dev = atzsccd.cd_devs[i]; 304 if (dev == NULL) 305 continue; 306 sdp = dev->sc_cregs; 307 stat = sdp->ISTR; 308 309 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 310 continue; 311 312 #ifdef DEBUG 313 if (atzsc_dmadebug & DDB_FOLLOW) 314 printf("atzsc_dmaintr (%d, 0x%x)\n", i, stat); 315 #endif 316 317 /* 318 * both, SCSI and DMA interrupts arrive here. I chose 319 * arbitrarily that DMA interrupts should have higher 320 * precedence than SCSI interrupts. 321 */ 322 if (stat & ISTR_E_INT) { 323 found++; 324 325 sdp->CINT = 1; /* clear possible interrupt */ 326 327 /* 328 * check for SCSI ints in the same go and 329 * eventually save an interrupt 330 */ 331 } 332 333 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 334 found += sbicintr(dev); 335 } 336 return(found); 337 } 338 339 340 int 341 atzsc_dmanext(dev) 342 struct sbic_softc *dev; 343 { 344 volatile struct sdmac *sdp; 345 int i, stat; 346 347 sdp = dev->sc_cregs; 348 349 if (dev->sc_cur > dev->sc_last) { 350 /* shouldn't happen !! */ 351 printf("atzsc_dmanext at end !!!\n"); 352 atzsc_dmastop(dev); 353 return(0); 354 } 355 #ifdef DEBUG 356 dev->sc_dmatimo = 1; 357 #endif 358 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 359 /* 360 * only FLUSH if terminal count not enabled, 361 * and reading from peripheral 362 */ 363 sdp->FLUSH = 1; 364 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 365 ; 366 } 367 /* 368 * clear possible interrupt and stop dma 369 */ 370 sdp->CINT = 1; /* clear possible interrupt */ 371 sdp->SP_DMA = 1; /* stop dma */ 372 sdp->CNTR = dev->sc_dmacmd; 373 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 374 sdp->ST_DMA = 1; 375 376 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 377 return(dev->sc_tcnt); 378 } 379 380 #ifdef DEBUG 381 /*ARGSUSED*/ 382 void 383 atzsc_dmatimeout(arg) 384 void *arg; 385 { 386 struct sbic_softc *dev; 387 int i, s; 388 389 for (i = 0; i < atzsccd.cd_ndevs; i++) { 390 dev = atzsccd.cd_devs[i]; 391 if (dev == NULL) 392 continue; 393 394 s = splbio(); 395 if (dev->sc_dmatimo) { 396 if (dev->sc_dmatimo > 1) 397 printf("atzsc_dma%d: timeout #%d\n", 398 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 399 dev->sc_dmatimo++; 400 } 401 splx(s); 402 } 403 timeout(atzsc_dmatimeout, 0, 30 * hz); 404 } 405 #endif 406
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