ahsc.c revision 1.1
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: ahsc.c,v 1.1 1994/05/08 05:52:54 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/ahscreg.h> 50 #include <amiga/dev/ztwobusvar.h> 51 52 int ahscprint __P((void *auxp, char *)); 53 void ahscattach __P((struct device *, struct device *, void *)); 54 int ahscmatch __P((struct device *, struct cfdata *, void *)); 55 56 void ahsc_dmafree __P((struct sbic_softc *)); 57 void ahsc_dmastop __P((struct sbic_softc *)); 58 int ahsc_dmanext __P((struct sbic_softc *)); 59 int ahsc_dmaintr __P((void)); 60 int ahsc_dmago __P((struct sbic_softc *, char *, int, int)); 61 62 struct scsi_adapter ahsc_scsiswitch = { 63 sbic_scsicmd, 64 sbic_minphys, 65 0, /* no lun support */ 66 0, /* no lun support */ 67 sbic_adinfo, 68 "ahsc", 69 }; 70 71 struct scsi_device ahsc_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 "ahsc", 77 0, 78 }; 79 80 81 #ifdef DEBUG 82 void ahsc_dmatimeout __P((void *)); 83 int ahsc_dmadebug = 0; 84 #endif 85 86 struct cfdriver ahsccd = { 87 NULL, "ahsc", ahscmatch, ahscattach, 88 DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; 89 90 /* 91 * if we are an A3000 we are here. 92 */ 93 int 94 ahscmatch(pdp, cdp, auxp) 95 struct device *pdp; 96 struct cfdata *cdp; 97 void *auxp; 98 { 99 char *mbusstr; 100 101 mbusstr = auxp; 102 if (is_a3000() && matchname(auxp, "ahsc")) 103 return(1); 104 return(0); 105 } 106 107 void 108 ahscattach(pdp, dp, auxp) 109 struct device *pdp, *dp; 110 void *auxp; 111 { 112 volatile struct sdmac *rp; 113 struct sbic_softc *sc; 114 115 sc = (struct sbic_softc *)dp; 116 sc->sc_cregs = rp = ztwomap(0xdd0000); 117 /* 118 * disable ints and reset bank register 119 */ 120 rp->CNTR = CNTR_PDMD; 121 rp->DAWR = DAWR_AHSC; 122 sc->sc_dmafree = ahsc_dmafree; 123 sc->sc_dmago = ahsc_dmago; 124 sc->sc_dmanext = ahsc_dmanext; 125 sc->sc_dmastop = ahsc_dmastop; 126 sc->sc_dmacmd = 0; 127 128 #ifdef DEBUG 129 /* make sure timeout is really not needed */ 130 timeout(ahsc_dmatimeout, 0, 30 * hz); 131 #endif 132 /* 133 * eveything is a valid dma address 134 */ 135 sc->sc_dmamask = 0; 136 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x41); 137 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 138 139 sbicreset(sc); 140 141 sc->sc_link.adapter_softc = sc; 142 sc->sc_link.adapter_targ = 7; 143 sc->sc_link.adapter = &ahsc_scsiswitch; 144 sc->sc_link.device = &ahsc_scsidev; 145 TAILQ_INIT(&sc->sc_xslist); 146 147 custom.intreq = INTF_PORTS; 148 custom.intena = INTF_SETCLR | INTF_PORTS; 149 150 /* 151 * attach all scsi units on us 152 */ 153 config_found(dp, &sc->sc_link, ahscprint); 154 } 155 156 /* 157 * print diag if pnp is NULL else just extra 158 */ 159 int 160 ahscprint(auxp, pnp) 161 void *auxp; 162 char *pnp; 163 { 164 if (pnp == NULL) 165 return(UNCONF); 166 return(QUIET); 167 } 168 169 170 void 171 ahsc_dmafree(dev) 172 struct sbic_softc *dev; 173 { 174 volatile struct sdmac *sdp; 175 int s; 176 177 sdp = dev->sc_cregs; 178 179 s = splbio(); 180 #ifdef DEBUG 181 dev->sc_dmatimo = 0; 182 #endif 183 if (dev->sc_dmacmd) { 184 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 185 /* 186 * only FLUSH if terminal count not enabled, 187 * and reading from peripheral 188 */ 189 sdp->FLUSH = 1; 190 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 191 ; 192 } 193 /* 194 * clear possible interrupt and stop dma 195 */ 196 sdp->CINT = 1; 197 sdp->SP_DMA = 1; 198 dev->sc_dmacmd = 0; 199 } 200 /* 201 * disable interrupts 202 */ 203 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 204 dev->sc_flags &= ~SBICF_INTR; 205 splx(s); 206 } 207 208 int 209 ahsc_dmago(dev, addr, count, flags) 210 struct sbic_softc *dev; 211 char *addr; 212 int count, flags; 213 { 214 volatile struct sdmac *sdp; 215 216 sdp = dev->sc_cregs; 217 /* 218 * Set up the command word based on flags 219 */ 220 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 221 if ((flags & DMAGO_READ) == 0) 222 dev->sc_dmacmd |= CNTR_DDIR; 223 #ifdef DEBUG 224 if (ahsc_dmadebug & DDB_IO) 225 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 226 dev->sc_dmatimo = 1; 227 #endif 228 229 dev->sc_flags |= SBICF_INTR; 230 sdp->CNTR = dev->sc_dmacmd; 231 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 232 sdp->ST_DMA = 1; 233 234 return(dev->sc_tcnt); 235 } 236 237 void 238 ahsc_dmastop(dev) 239 struct sbic_softc *dev; 240 { 241 volatile struct sdmac *sdp; 242 int s; 243 244 sdp = dev->sc_cregs; 245 246 #ifdef DEBUG 247 if (ahsc_dmadebug & DDB_FOLLOW) 248 printf("ahsc_dmastop()\n"); 249 dev->sc_dmatimo = 0; 250 #endif 251 if (dev->sc_dmacmd) { 252 s = splbio(); 253 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 254 /* 255 * only FLUSH if terminal count not enabled, 256 * and reading from peripheral 257 */ 258 sdp->FLUSH = 1; 259 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 260 ; 261 } 262 /* 263 * clear possible interrupt and stop dma 264 */ 265 sdp->CINT = 1; 266 sdp->SP_DMA = 1; 267 dev->sc_dmacmd = 0; 268 splx(s); 269 } 270 } 271 272 int 273 ahsc_dmaintr() 274 { 275 volatile struct sdmac *sdp; 276 struct sbic_softc *dev; 277 int i, stat, found; 278 279 found = 0; 280 for (i = 0; i < ahsccd.cd_ndevs; i++) { 281 dev = ahsccd.cd_devs[i]; 282 if (dev == NULL) 283 continue; 284 sdp = dev->sc_cregs; 285 stat = sdp->ISTR; 286 287 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 288 continue; 289 290 #ifdef DEBUG 291 if (ahsc_dmadebug & DDB_FOLLOW) 292 printf("ahsc_dmaintr (%d, 0x%x)\n", i, stat); 293 #endif 294 295 /* 296 * both, SCSI and DMA interrupts arrive here. I chose 297 * arbitrarily that DMA interrupts should have higher 298 * precedence than SCSI interrupts. 299 */ 300 if (stat & ISTR_E_INT) { 301 found++; 302 303 sdp->CINT = 1; /* clear possible interrupt */ 304 305 /* 306 * check for SCSI ints in the same go and 307 * eventually save an interrupt 308 */ 309 } 310 311 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 312 found += sbicintr(i); 313 } 314 return(found); 315 } 316 317 318 int 319 ahsc_dmanext(dev) 320 struct sbic_softc *dev; 321 { 322 volatile struct sdmac *sdp; 323 int i, stat; 324 325 sdp = dev->sc_cregs; 326 327 if (dev->sc_cur > dev->sc_last) { 328 /* shouldn't happen !! */ 329 printf("ahsc_dmanext at end !!!\n"); 330 ahsc_dmastop(dev); 331 return(0); 332 } 333 #ifdef DEBUG 334 dev->sc_dmatimo = 1; 335 #endif 336 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 337 /* 338 * only FLUSH if terminal count not enabled, 339 * and reading from peripheral 340 */ 341 sdp->FLUSH = 1; 342 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 343 ; 344 } 345 /* 346 * clear possible interrupt and stop dma 347 */ 348 sdp->CINT = 1; /* clear possible interrupt */ 349 sdp->SP_DMA = 1; /* stop dma */ 350 sdp->CNTR = dev->sc_dmacmd; 351 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 352 sdp->ST_DMA = 1; 353 354 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 355 return(dev->sc_tcnt); 356 } 357 358 #ifdef DEBUG 359 /*ARGSUSED*/ 360 void 361 ahsc_dmatimeout(arg) 362 void *arg; 363 { 364 struct sbic_softc *dev; 365 int i, s; 366 367 for (i = 0; i < ahsccd.cd_ndevs; i++) { 368 dev = ahsccd.cd_devs[i]; 369 if (dev == NULL) 370 continue; 371 372 s = splbio(); 373 if (dev->sc_dmatimo) { 374 if (dev->sc_dmatimo > 1) 375 printf("ahsc_dma%d: timeout #%d\n", 376 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 377 dev->sc_dmatimo++; 378 } 379 splx(s); 380 } 381 timeout(ahsc_dmatimeout, 0, 30 * hz); 382 } 383 #endif 384
Indexes created Tue Sep 30 20:09:53 GMT 2025