atzsc.c revision 1.12
1 /* $NetBSD: atzsc.c,v 1.12 1995/08/18 15:27:49 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((struct sbic_softc *)); 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((void *)atzsc_dmatimeout, sc, 30 * hz); 138 #endif 139 /* 140 * only 24 bit mem. 141 */ 142 sc->sc_flags |= SBICF_BADDMA; 143 sc->sc_dmamask = ~0x00ffffff; 144 #if 0 145 /* 146 * If the users kva space is not ztwo try and allocate a bounce buffer. 147 * XXX this needs to change if we move to multiple memory segments. 148 */ 149 if (kvtop(sc) & sc->sc_dmamask) { 150 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 151 if (isztwomem(sc->sc_dmabuffer)) 152 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 153 else if (sc->sc_dmabuffer) 154 printf(" bounce pa 0x%x", 155 PREP_DMA_MEM(sc->sc_dmabuffer)); 156 } 157 #endif 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 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 = 2; 168 169 sbicinit(sc); 170 171 sc->sc_isr.isr_intr = atzsc_dmaintr; 172 sc->sc_isr.isr_arg = sc; 173 sc->sc_isr.isr_ipl = 2; 174 add_isr (&sc->sc_isr); 175 176 /* 177 * attach all scsi units on us 178 */ 179 config_found(dp, &sc->sc_link, atzscprint); 180 } 181 182 /* 183 * print diag if pnp is NULL else just extra 184 */ 185 int 186 atzscprint(auxp, pnp) 187 void *auxp; 188 char *pnp; 189 { 190 if (pnp == NULL) 191 return(UNCONF); 192 return(QUIET); 193 } 194 195 196 void 197 atzsc_dmafree(dev) 198 struct sbic_softc *dev; 199 { 200 volatile struct sdmac *sdp; 201 int s; 202 203 sdp = dev->sc_cregs; 204 205 s = splbio(); 206 #ifdef DEBUG 207 dev->sc_dmatimo = 0; 208 #endif 209 if (dev->sc_dmacmd) { 210 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 211 /* 212 * only FLUSH if terminal count not enabled, 213 * and reading from peripheral 214 */ 215 sdp->FLUSH = 1; 216 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 217 ; 218 } 219 /* 220 * clear possible interrupt and stop dma 221 */ 222 sdp->CINT = 1; 223 sdp->SP_DMA = 1; 224 dev->sc_dmacmd = 0; 225 } 226 /* 227 * disable interrupts 228 */ 229 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 230 dev->sc_flags &= ~SBICF_INTR; 231 splx(s); 232 } 233 234 int 235 atzsc_dmago(dev, addr, count, flags) 236 struct sbic_softc *dev; 237 char *addr; 238 int count, flags; 239 { 240 volatile struct sdmac *sdp; 241 242 sdp = dev->sc_cregs; 243 /* 244 * Set up the command word based on flags 245 */ 246 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 247 if ((flags & DMAGO_READ) == 0) 248 dev->sc_dmacmd |= CNTR_DDIR; 249 #ifdef DEBUG 250 if (atzsc_dmadebug & DDB_IO) 251 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 252 dev->sc_dmatimo = 1; 253 #endif 254 255 dev->sc_flags |= SBICF_INTR; 256 sdp->CNTR = dev->sc_dmacmd; 257 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 258 sdp->ST_DMA = 1; 259 260 return(dev->sc_tcnt); 261 } 262 263 void 264 atzsc_dmastop(dev) 265 struct sbic_softc *dev; 266 { 267 volatile struct sdmac *sdp; 268 int s; 269 270 sdp = dev->sc_cregs; 271 272 #ifdef DEBUG 273 if (atzsc_dmadebug & DDB_FOLLOW) 274 printf("atzsc_dmastop()\n"); 275 dev->sc_dmatimo = 0; 276 #endif 277 if (dev->sc_dmacmd) { 278 s = splbio(); 279 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 280 /* 281 * only FLUSH if terminal count not enabled, 282 * and reading from peripheral 283 */ 284 sdp->FLUSH = 1; 285 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 286 ; 287 } 288 /* 289 * clear possible interrupt and stop dma 290 */ 291 sdp->CINT = 1; 292 sdp->SP_DMA = 1; 293 dev->sc_dmacmd = 0; 294 splx(s); 295 } 296 } 297 298 int 299 atzsc_dmaintr(dev) 300 struct sbic_softc *dev; 301 { 302 volatile struct sdmac *sdp; 303 int stat, found; 304 305 sdp = dev->sc_cregs; 306 stat = sdp->ISTR; 307 308 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 309 return (0); 310 311 #ifdef DEBUG 312 if (atzsc_dmadebug & DDB_FOLLOW) 313 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 314 #endif 315 316 /* 317 * both, SCSI and DMA interrupts arrive here. I chose 318 * arbitrarily that DMA interrupts should have higher 319 * precedence than SCSI interrupts. 320 */ 321 found = 0; 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 return(found); 336 } 337 338 339 int 340 atzsc_dmanext(dev) 341 struct sbic_softc *dev; 342 { 343 volatile struct sdmac *sdp; 344 int i, stat; 345 346 sdp = dev->sc_cregs; 347 348 if (dev->sc_cur > dev->sc_last) { 349 /* shouldn't happen !! */ 350 printf("atzsc_dmanext at end !!!\n"); 351 atzsc_dmastop(dev); 352 return(0); 353 } 354 #ifdef DEBUG 355 dev->sc_dmatimo = 1; 356 #endif 357 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 358 /* 359 * only FLUSH if terminal count not enabled, 360 * and reading from peripheral 361 */ 362 sdp->FLUSH = 1; 363 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 364 ; 365 } 366 /* 367 * clear possible interrupt and stop dma 368 */ 369 sdp->CINT = 1; /* clear possible interrupt */ 370 sdp->SP_DMA = 1; /* stop dma */ 371 sdp->CNTR = dev->sc_dmacmd; 372 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 373 sdp->ST_DMA = 1; 374 375 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 376 return(dev->sc_tcnt); 377 } 378 379 #ifdef DEBUG 380 /*ARGSUSED*/ 381 void 382 atzsc_dmatimeout(sc) 383 struct sbic_softc *sc; 384 { 385 int s; 386 387 s = splbio(); 388 if (sc->sc_dmatimo) { 389 if (sc->sc_dmatimo > 1) 390 printf("%s: dma timeout #%d\n", 391 sc->sc_dev.dv_xname, sc->sc_dmatimo - 1); 392 sc->sc_dmatimo++; 393 } 394 splx(s); 395 timeout((void *)atzsc_dmatimeout, sc, 30 * hz); 396 } 397 #endif 398
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