gtsc.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: gtsc.c,v 1.2 1994/05/11 19:06:44 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/gtscreg.h> 50 #include <amiga/dev/ztwobusvar.h> 51 #include <amiga/dev/gvpbusvar.h> 52 53 void gtscattach __P((struct device *, struct device *, void *)); 54 int gtscmatch __P((struct device *, struct cfdata *, void *)); 55 int gtscprint __P((void *auxp, char *)); 56 57 void gtsc_dmafree __P((struct sbic_softc *)); 58 void gtsc_dmastop __P((struct sbic_softc *)); 59 int gtsc_dmanext __P((struct sbic_softc *)); 60 int gtsc_dmaintr __P((void)); 61 int gtsc_dmago __P((struct sbic_softc *, char *, int, int)); 62 63 int 64 dk_establish() 65 { 66 return(-1); 67 } 68 69 struct scsi_adapter gtsc_scsiswitch = { 70 sbic_scsicmd, 71 sbic_minphys, 72 0, /* no lun support */ 73 0, /* no lun support */ 74 sbic_adinfo, 75 "gtsc", 76 }; 77 78 struct scsi_device gtsc_scsidev = { 79 NULL, /* use default error handler */ 80 NULL, /* have a queue served by this ??? */ 81 NULL, /* have no async handler ??? */ 82 NULL, /* Use default done routine */ 83 "gtsc", 84 0, 85 }; 86 87 int gtsc_maxdma = 0; /* Maximum size per DMA transfer */ 88 int gtsc_dmamask = 0; 89 int gtsc_dmabounce = 0; 90 91 #ifdef DEBUG 92 void gtsc_dmatimeout __P((void *)); 93 int gtsc_debug = 0; 94 #endif 95 96 struct cfdriver gtsccd = { 97 NULL, "gtsc", gtscmatch, gtscattach, 98 DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; 99 100 int 101 gtscmatch(pdp, cdp, auxp) 102 struct device *pdp; 103 struct cfdata *cdp; 104 void *auxp; 105 { 106 struct gvpbus_args *gap; 107 108 gap = auxp; 109 if (gap->flags & GVP_SCSI) 110 return(1); 111 return(0); 112 } 113 114 /* 115 * attach all devices on our board. 116 */ 117 void 118 gtscattach(pdp, dp, auxp) 119 struct device *pdp, *dp; 120 void *auxp; 121 { 122 volatile struct sdmac *rp; 123 struct gvpbus_args *gap; 124 struct sbic_softc *sc; 125 126 gap = auxp; 127 sc = (struct sbic_softc *)dp; 128 sc->sc_cregs = rp = gap->zargs.va; 129 /* 130 * disable ints and reset bank register 131 */ 132 rp->CNTR = 0; 133 rp->bank = 0; 134 135 sc->sc_dmago = gtsc_dmago; 136 sc->sc_dmafree = gtsc_dmafree; 137 sc->sc_dmanext = gtsc_dmanext; 138 sc->sc_dmastop = gtsc_dmastop; 139 sc->sc_dmacmd = 0; 140 141 #ifdef DEBUG 142 /* make sure timeout is really not needed */ 143 timeout((void *)gtsc_dmatimeout, 0, 30 * hz); 144 #endif 145 146 sc->sc_flags |= SBICF_BADDMA; 147 if (gtsc_dmamask) 148 sc->sc_dmamask = gtsc_dmamask; 149 else if (gap->flags & GVP_24BITDMA) 150 sc->sc_dmamask = ~0x00ffffff; 151 else if (gap->flags & GVP_25BITDMA) 152 sc->sc_dmamask = ~0x01ffffff; 153 else 154 sc->sc_dmamask = ~0x07ffffff; 155 printf(" dmamask 0x%x", ~sc->sc_dmamask); 156 157 sc->gtsc_bankmask = (~sc->sc_dmamask >> 18) & 0x01c0; 158 159 160 /* 161 * if the user requests a bounce buffer or 162 * the users kva space is not ztwo and dma needs it 163 * try and allocate a bounce buffer. If we allocate 164 * one and it is in ztwo space leave maxdma to user 165 * setting or default to MAXPHYS else the address must 166 * be on the chip bus so decrease it to either the users 167 * setting or 1024 bytes. 168 * 169 * XXX this needs to change if we move to multiple memory segments. 170 */ 171 if (gtsc_dmabounce || kvtop(sc) & sc->sc_dmamask) { 172 sc->sc_dmabuffer = (char *) alloc_z2mem(MAXPHYS); 173 if (isztwomem(sc->sc_dmabuffer)) 174 printf(" bounce pa 0x%x", ztwopa(sc->sc_dmabuffer)); 175 else if (gtsc_maxdma == 0) { 176 gtsc_maxdma = 1024; 177 printf(" bounce pa 0x%x", 178 PREP_DMA_MEM(sc->sc_dmabuffer)); 179 } 180 } 181 if (gtsc_maxdma == 0) 182 gtsc_maxdma = MAXPHYS; 183 184 printf(" maxdma %d\n", gtsc_maxdma); 185 186 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x61); 187 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 188 189 sbicreset(sc); 190 191 sc->sc_link.adapter_softc = sc; 192 sc->sc_link.adapter_targ = 7; 193 sc->sc_link.adapter = >sc_scsiswitch; 194 sc->sc_link.device = >sc_scsidev; 195 TAILQ_INIT(&sc->sc_xslist); 196 197 custom.intreq = INTF_PORTS; 198 custom.intena = INTF_SETCLR | INTF_PORTS; 199 200 /* 201 * attach all scsi units on us 202 */ 203 config_found(dp, &sc->sc_link, gtscprint); 204 } 205 206 /* 207 * print diag if pnp is NULL else just extra 208 */ 209 int 210 gtscprint(auxp, pnp) 211 void *auxp; 212 char *pnp; 213 { 214 if (pnp == NULL) 215 return(UNCONF); 216 return(QUIET); 217 } 218 219 void 220 gtsc_dmafree(dev) 221 struct sbic_softc *dev; 222 { 223 volatile struct sdmac *sdp; 224 int s; 225 226 sdp = dev->sc_cregs; 227 228 s = splbio(); 229 #ifdef DEBUG 230 dev->sc_dmatimo = 0; 231 #endif 232 if (dev->sc_dmacmd) { 233 /* 234 * clear possible interrupt and stop dma 235 */ 236 sdp->CNTR &= ~GVP_CNTR_INT_P; 237 sdp->SP_DMA = 1; 238 dev->sc_dmacmd = 0; 239 } 240 #ifdef DEBUG 241 if (gtsc_debug & (DDB_IO | DDB_FOLLOW)) 242 printf("gtsc_dmafree\n"); 243 #endif 244 /* 245 * disable interrupts 246 */ 247 sdp->CNTR = 0; /* disable interrupts from dma/sbic */ 248 dev->sc_flags &= ~SBICF_INTR; 249 splx(s); 250 } 251 252 int 253 gtsc_dmago(dev, addr, count, flags) 254 struct sbic_softc *dev; 255 char *addr; 256 int count, flags; 257 { 258 volatile struct sdmac *sdp; 259 260 sdp = dev->sc_cregs; 261 /* 262 * Set up the command word based on flags 263 */ 264 dev->sc_dmacmd = GVP_CNTR_INTEN; 265 if ((flags & DMAGO_READ) == 0) 266 dev->sc_dmacmd |= GVP_CNTR_DDIR; 267 268 #ifdef DEBUG 269 if (gtsc_debug & DDB_IO) 270 printf("gtsc_dmago: cmd %x\n", dev->sc_dmacmd); 271 dev->sc_dmatimo = 1; 272 #endif 273 dev->sc_flags |= SBICF_INTR; 274 sdp->CNTR = dev->sc_dmacmd; 275 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 276 if (dev->gtsc_bankmask) 277 sdp->bank = dev->gtsc_bankmask & (((u_int) dev->sc_cur->dc_addr) >> 18); 278 sdp->ST_DMA = 1; 279 280 /* 281 * restrict transfer count to maximum 282 */ 283 if (dev->sc_tcnt > gtsc_maxdma) 284 dev->sc_tcnt = gtsc_maxdma; 285 return(dev->sc_tcnt); 286 } 287 288 void 289 gtsc_dmastop(dev) 290 struct sbic_softc *dev; 291 { 292 volatile struct sdmac *sdp; 293 int s; 294 295 sdp = dev->sc_cregs; 296 297 #ifdef DEBUG 298 if (gtsc_debug & DDB_FOLLOW) 299 printf("gtsc_dmastop()\n"); 300 dev->sc_dmatimo = 0; 301 #endif 302 if (dev->sc_dmacmd) { 303 /* 304 * clear possible interrupt and stop dma 305 */ 306 s = splbio(); 307 sdp->CNTR &= ~GVP_CNTR_INT_P; 308 sdp->SP_DMA = 1; 309 dev->sc_dmacmd = 0; 310 splx(s); 311 } 312 } 313 314 int 315 gtsc_dmaintr() 316 { 317 volatile struct sdmac *sdp; 318 struct sbic_softc *dev; 319 int i, stat, found; 320 321 found = 0; 322 for (i = 0; i < gtsccd.cd_ndevs; i++) { 323 dev = gtsccd.cd_devs[i]; 324 if (dev == NULL) 325 continue; 326 sdp = dev->sc_cregs; 327 stat = sdp->CNTR; 328 if ((stat & GVP_CNTR_INT_P) == 0) 329 continue; 330 #ifdef DEBUG 331 if (gtsc_debug & DDB_FOLLOW) 332 printf("gtsc_dmaintr(%d, 0x%x) ", i, stat); 333 #endif 334 if (dev->sc_flags & SBICF_INTR) 335 found += sbicintr(dev); 336 } 337 return(found); 338 } 339 340 341 int 342 gtsc_dmanext(dev) 343 struct sbic_softc *dev; 344 { 345 volatile struct sdmac *sdp; 346 int i, stat; 347 348 sdp = dev->sc_cregs; 349 350 if (dev->sc_cur > dev->sc_last) { 351 /* shouldn't happen !! */ 352 printf("gtsc_dmanext at end !!!\n"); 353 gtsc_dmastop(dev); 354 return(0); 355 } 356 #ifdef DEBUG 357 dev->sc_dmatimo = 1; 358 #endif 359 /* 360 * clear possible interrupt and stop dma 361 */ 362 sdp->CNTR &= ~GVP_CNTR_INT_P; 363 sdp->SP_DMA = 1; 364 365 sdp->CNTR = dev->sc_dmacmd; 366 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 367 if (dev->gtsc_bankmask) 368 sdp->bank = 369 dev->gtsc_bankmask & ((u_int)dev->sc_cur->dc_addr >> 18); 370 sdp->ST_DMA = 1; 371 372 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 373 if (dev->sc_tcnt > gtsc_maxdma) 374 dev->sc_tcnt = gtsc_maxdma; 375 #ifdef DEBUG 376 if (gtsc_debug & DDB_FOLLOW) 377 printf("gtsc_dmanext ret: %d\n", dev->sc_tcnt); 378 #endif 379 return(dev->sc_tcnt); 380 } 381 382 #ifdef DEBUG 383 void 384 gtsc_dmatimeout(arg) 385 void *arg; 386 { 387 struct sbic_softc *dev; 388 int i, s; 389 390 for (i = 0; i < gtsccd.cd_ndevs; i++) { 391 dev = gtsccd.cd_devs[i]; 392 if (dev == NULL) 393 continue; 394 s = splbio(); 395 if (dev->sc_dmatimo) { 396 if (dev->sc_dmatimo > 1) 397 printf("gtsc_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(gtsc_dmatimeout, 0, 30 * hz); 404 } 405 #endif 406
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