atzsc.c revision 1.11
1 /* $NetBSD: atzsc.c,v 1.11 1995/02/12 19:19:02 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/amiga/isr.h> 48 #include <amiga/dev/dmavar.h> 49 #include <amiga/dev/sbicreg.h> 50 #include <amiga/dev/sbicvar.h> 51 #include <amiga/dev/atzscreg.h> 52 #include <amiga/dev/zbusvar.h> 53 54 int atzscprint __P((void *auxp, char *)); 55 void atzscattach __P((struct device *, struct device *, void *)); 56 int atzscmatch __P((struct device *, struct cfdata *, void *)); 57 58 void atzsc_dmafree __P((struct sbic_softc *)); 59 void atzsc_dmastop __P((struct sbic_softc *)); 60 int atzsc_dmanext __P((struct sbic_softc *)); 61 int atzsc_dmaintr __P((struct sbic_softc *)); 62 int atzsc_dmago __P((struct sbic_softc *, char *, int, int)); 63 64 struct scsi_adapter atzsc_scsiswitch = { 65 sbic_scsicmd, 66 sbic_minphys, 67 0, /* no lun support */ 68 0, /* no lun support */ 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 }; 77 78 79 #ifdef DEBUG 80 void atzsc_dmatimeout __P((void *)); 81 int atzsc_dmadebug = 0; 82 #endif 83 84 struct cfdriver atzsccd = { 85 NULL, "atzsc", (cfmatch_t)atzscmatch, atzscattach, 86 DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; 87 88 /* 89 * if we are an A3000 we are here. 90 */ 91 int 92 atzscmatch(pdp, cdp, auxp) 93 struct device *pdp; 94 struct cfdata *cdp; 95 void *auxp; 96 { 97 struct zbus_args *zap; 98 99 zap = auxp; 100 101 /* 102 * Check manufacturer and product id. 103 * I was informed that older boards can be 2 also. 104 */ 105 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 106 return(1); 107 else 108 return(0); 109 } 110 111 void 112 atzscattach(pdp, dp, auxp) 113 struct device *pdp, *dp; 114 void *auxp; 115 { 116 volatile struct sdmac *rp; 117 struct sbic_softc *sc; 118 struct zbus_args *zap; 119 120 zap = auxp; 121 122 sc = (struct sbic_softc *)dp; 123 sc->sc_cregs = rp = zap->va; 124 /* 125 * disable ints and reset bank register 126 */ 127 rp->CNTR = CNTR_PDMD; 128 rp->DAWR = DAWR_ATZSC; 129 sc->sc_dmafree = atzsc_dmafree; 130 sc->sc_dmago = atzsc_dmago; 131 sc->sc_dmanext = atzsc_dmanext; 132 sc->sc_dmastop = atzsc_dmastop; 133 sc->sc_dmacmd = 0; 134 135 #ifdef DEBUG 136 /* make sure timeout is really not needed */ 137 timeout(atzsc_dmatimeout, 0, 30 * hz); 138 #endif 139 /* 140 * only 24 bit mem. 141 */ 142 sc->sc_flags |= SBICF_BADDMA; 143 sc->sc_dmamask = ~0x00ffffff; 144 /* 145 * If the users kva space is not ztwo try and allocate a bounce buffer. 146 * XXX this needs to change if we move to multiple memory segments. 147 */ 148 if (kvtop(sc) & sc->sc_dmamask) { 149 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS); 150 if (isztwomem(sc->sc_dmabuffer)) 151 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 152 else if (sc->sc_dmabuffer) 153 printf(" bounce pa 0x%x", 154 PREP_DMA_MEM(sc->sc_dmabuffer)); 155 } 156 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 157 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 158 159 printf(": dmamask 0x%x\n", ~sc->sc_dmamask); 160 161 sbicreset(sc); 162 163 sc->sc_link.adapter_softc = sc; 164 sc->sc_link.adapter_target = 7; 165 sc->sc_link.adapter = &atzsc_scsiswitch; 166 sc->sc_link.device = &atzsc_scsidev; 167 sc->sc_link.openings = 1; 168 TAILQ_INIT(&sc->sc_xslist); 169 170 sc->sc_isr.isr_intr = atzsc_dmaintr; 171 sc->sc_isr.isr_arg = sc; 172 sc->sc_isr.isr_ipl = 2; 173 add_isr (&sc->sc_isr); 174 175 /* 176 * attach all scsi units on us 177 */ 178 config_found(dp, &sc->sc_link, atzscprint); 179 } 180 181 /* 182 * print diag if pnp is NULL else just extra 183 */ 184 int 185 atzscprint(auxp, pnp) 186 void *auxp; 187 char *pnp; 188 { 189 if (pnp == NULL) 190 return(UNCONF); 191 return(QUIET); 192 } 193 194 195 void 196 atzsc_dmafree(dev) 197 struct sbic_softc *dev; 198 { 199 volatile struct sdmac *sdp; 200 int s; 201 202 sdp = dev->sc_cregs; 203 204 s = splbio(); 205 #ifdef DEBUG 206 dev->sc_dmatimo = 0; 207 #endif 208 if (dev->sc_dmacmd) { 209 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 210 /* 211 * only FLUSH if terminal count not enabled, 212 * and reading from peripheral 213 */ 214 sdp->FLUSH = 1; 215 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 216 ; 217 } 218 /* 219 * clear possible interrupt and stop dma 220 */ 221 sdp->CINT = 1; 222 sdp->SP_DMA = 1; 223 dev->sc_dmacmd = 0; 224 } 225 /* 226 * disable interrupts 227 */ 228 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 229 dev->sc_flags &= ~SBICF_INTR; 230 splx(s); 231 } 232 233 int 234 atzsc_dmago(dev, addr, count, flags) 235 struct sbic_softc *dev; 236 char *addr; 237 int count, flags; 238 { 239 volatile struct sdmac *sdp; 240 241 sdp = dev->sc_cregs; 242 /* 243 * Set up the command word based on flags 244 */ 245 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 246 if ((flags & DMAGO_READ) == 0) 247 dev->sc_dmacmd |= CNTR_DDIR; 248 #ifdef DEBUG 249 if (atzsc_dmadebug & DDB_IO) 250 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 251 dev->sc_dmatimo = 1; 252 #endif 253 254 dev->sc_flags |= SBICF_INTR; 255 sdp->CNTR = dev->sc_dmacmd; 256 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 257 sdp->ST_DMA = 1; 258 259 return(dev->sc_tcnt); 260 } 261 262 void 263 atzsc_dmastop(dev) 264 struct sbic_softc *dev; 265 { 266 volatile struct sdmac *sdp; 267 int s; 268 269 sdp = dev->sc_cregs; 270 271 #ifdef DEBUG 272 if (atzsc_dmadebug & DDB_FOLLOW) 273 printf("atzsc_dmastop()\n"); 274 dev->sc_dmatimo = 0; 275 #endif 276 if (dev->sc_dmacmd) { 277 s = splbio(); 278 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 279 /* 280 * only FLUSH if terminal count not enabled, 281 * and reading from peripheral 282 */ 283 sdp->FLUSH = 1; 284 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 285 ; 286 } 287 /* 288 * clear possible interrupt and stop dma 289 */ 290 sdp->CINT = 1; 291 sdp->SP_DMA = 1; 292 dev->sc_dmacmd = 0; 293 splx(s); 294 } 295 } 296 297 int 298 atzsc_dmaintr(dev) 299 struct sbic_softc *dev; 300 { 301 volatile struct sdmac *sdp; 302 int stat, found; 303 304 sdp = dev->sc_cregs; 305 stat = sdp->ISTR; 306 307 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 308 return (0); 309 310 #ifdef DEBUG 311 if (atzsc_dmadebug & DDB_FOLLOW) 312 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 313 #endif 314 315 /* 316 * both, SCSI and DMA interrupts arrive here. I chose 317 * arbitrarily that DMA interrupts should have higher 318 * precedence than SCSI interrupts. 319 */ 320 found = 0; 321 if (stat & ISTR_E_INT) { 322 found++; 323 324 sdp->CINT = 1; /* clear possible interrupt */ 325 326 /* 327 * check for SCSI ints in the same go and 328 * eventually save an interrupt 329 */ 330 } 331 332 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 333 found += sbicintr(dev); 334 return(found); 335 } 336 337 338 int 339 atzsc_dmanext(dev) 340 struct sbic_softc *dev; 341 { 342 volatile struct sdmac *sdp; 343 int i, stat; 344 345 sdp = dev->sc_cregs; 346 347 if (dev->sc_cur > dev->sc_last) { 348 /* shouldn't happen !! */ 349 printf("atzsc_dmanext at end !!!\n"); 350 atzsc_dmastop(dev); 351 return(0); 352 } 353 #ifdef DEBUG 354 dev->sc_dmatimo = 1; 355 #endif 356 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 357 /* 358 * only FLUSH if terminal count not enabled, 359 * and reading from peripheral 360 */ 361 sdp->FLUSH = 1; 362 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 363 ; 364 } 365 /* 366 * clear possible interrupt and stop dma 367 */ 368 sdp->CINT = 1; /* clear possible interrupt */ 369 sdp->SP_DMA = 1; /* stop dma */ 370 sdp->CNTR = dev->sc_dmacmd; 371 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 372 sdp->ST_DMA = 1; 373 374 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 375 return(dev->sc_tcnt); 376 } 377 378 #ifdef DEBUG 379 /*ARGSUSED*/ 380 void 381 atzsc_dmatimeout(arg) 382 void *arg; 383 { 384 struct sbic_softc *dev; 385 int i, s; 386 387 for (i = 0; i < atzsccd.cd_ndevs; i++) { 388 dev = atzsccd.cd_devs[i]; 389 if (dev == NULL) 390 continue; 391 392 s = splbio(); 393 if (dev->sc_dmatimo) { 394 if (dev->sc_dmatimo > 1) 395 printf("atzsc_dma%d: timeout #%d\n", 396 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 397 dev->sc_dmatimo++; 398 } 399 splx(s); 400 } 401 timeout(atzsc_dmatimeout, 0, 30 * hz); 402 } 403 #endif 404
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