ahsc.c revision 1.5
1 /* $NetBSD: ahsc.c,v 1.5 1994/12/01 17:24:51 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/ahscreg.h> 51 #include <amiga/dev/ztwobusvar.h> 52 53 int ahscprint __P((void *auxp, char *)); 54 void ahscattach __P((struct device *, struct device *, void *)); 55 int ahscmatch __P((struct device *, struct cfdata *, void *)); 56 57 void ahsc_dmafree __P((struct sbic_softc *)); 58 void ahsc_dmastop __P((struct sbic_softc *)); 59 int ahsc_dmanext __P((struct sbic_softc *)); 60 int ahsc_dmaintr __P((void)); 61 int ahsc_dmago __P((struct sbic_softc *, char *, int, int)); 62 63 struct scsi_adapter ahsc_scsiswitch = { 64 sbic_scsicmd, 65 sbic_minphys, 66 0, /* no lun support */ 67 0, /* no lun support */ 68 sbic_adinfo, 69 "ahsc", 70 }; 71 72 struct scsi_device ahsc_scsidev = { 73 NULL, /* use default error handler */ 74 NULL, /* do not have a start functio */ 75 NULL, /* have no async handler */ 76 NULL, /* Use default done routine */ 77 "ahsc", 78 0, 79 }; 80 81 82 #ifdef DEBUG 83 void ahsc_dmatimeout __P((void *)); 84 int ahsc_dmadebug = 0; 85 #endif 86 87 struct cfdriver ahsccd = { 88 NULL, "ahsc", (cfmatch_t)ahscmatch, ahscattach, 89 DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; 90 91 /* 92 * if we are an A3000 we are here. 93 */ 94 int 95 ahscmatch(pdp, cdp, auxp) 96 struct device *pdp; 97 struct cfdata *cdp; 98 void *auxp; 99 { 100 char *mbusstr; 101 102 mbusstr = auxp; 103 if (is_a3000() && matchname(auxp, "ahsc")) 104 return(1); 105 return(0); 106 } 107 108 void 109 ahscattach(pdp, dp, auxp) 110 struct device *pdp, *dp; 111 void *auxp; 112 { 113 volatile struct sdmac *rp; 114 struct sbic_softc *sc; 115 116 printf("\n"); 117 118 sc = (struct sbic_softc *)dp; 119 sc->sc_cregs = rp = ztwomap(0xdd0000); 120 /* 121 * disable ints and reset bank register 122 */ 123 rp->CNTR = CNTR_PDMD; 124 rp->DAWR = DAWR_AHSC; 125 sc->sc_dmafree = ahsc_dmafree; 126 sc->sc_dmago = ahsc_dmago; 127 sc->sc_dmanext = ahsc_dmanext; 128 sc->sc_dmastop = ahsc_dmastop; 129 sc->sc_dmacmd = 0; 130 131 #ifdef DEBUG 132 /* make sure timeout is really not needed */ 133 timeout(ahsc_dmatimeout, 0, 30 * hz); 134 #endif 135 /* 136 * eveything is a valid dma address 137 */ 138 sc->sc_dmamask = 0; 139 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x41); 140 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 141 142 sbicreset(sc); 143 144 sc->sc_link.adapter_softc = sc; 145 sc->sc_link.adapter_targ = 7; 146 sc->sc_link.adapter = &ahsc_scsiswitch; 147 sc->sc_link.device = &ahsc_scsidev; 148 TAILQ_INIT(&sc->sc_xslist); 149 150 custom.intreq = INTF_PORTS; 151 custom.intena = INTF_SETCLR | INTF_PORTS; 152 153 /* 154 * attach all scsi units on us 155 */ 156 config_found(dp, &sc->sc_link, ahscprint); 157 } 158 159 /* 160 * print diag if pnp is NULL else just extra 161 */ 162 int 163 ahscprint(auxp, pnp) 164 void *auxp; 165 char *pnp; 166 { 167 if (pnp == NULL) 168 return(UNCONF); 169 return(QUIET); 170 } 171 172 173 void 174 ahsc_dmafree(dev) 175 struct sbic_softc *dev; 176 { 177 volatile struct sdmac *sdp; 178 int s; 179 180 sdp = dev->sc_cregs; 181 182 s = splbio(); 183 #ifdef DEBUG 184 dev->sc_dmatimo = 0; 185 #endif 186 if (dev->sc_dmacmd) { 187 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 188 /* 189 * only FLUSH if terminal count not enabled, 190 * and reading from peripheral 191 */ 192 sdp->FLUSH = 1; 193 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 194 ; 195 } 196 /* 197 * clear possible interrupt and stop dma 198 */ 199 sdp->CINT = 1; 200 sdp->SP_DMA = 1; 201 dev->sc_dmacmd = 0; 202 } 203 /* 204 * disable interrupts 205 */ 206 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 207 dev->sc_flags &= ~SBICF_INTR; 208 splx(s); 209 } 210 211 int 212 ahsc_dmago(dev, addr, count, flags) 213 struct sbic_softc *dev; 214 char *addr; 215 int count, flags; 216 { 217 volatile struct sdmac *sdp; 218 219 sdp = dev->sc_cregs; 220 /* 221 * Set up the command word based on flags 222 */ 223 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 224 if ((flags & DMAGO_READ) == 0) 225 dev->sc_dmacmd |= CNTR_DDIR; 226 #ifdef DEBUG 227 if (ahsc_dmadebug & DDB_IO) 228 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 229 dev->sc_dmatimo = 1; 230 #endif 231 232 dev->sc_flags |= SBICF_INTR; 233 sdp->CNTR = dev->sc_dmacmd; 234 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 235 sdp->ST_DMA = 1; 236 237 return(dev->sc_tcnt); 238 } 239 240 void 241 ahsc_dmastop(dev) 242 struct sbic_softc *dev; 243 { 244 volatile struct sdmac *sdp; 245 int s; 246 247 sdp = dev->sc_cregs; 248 249 #ifdef DEBUG 250 if (ahsc_dmadebug & DDB_FOLLOW) 251 printf("ahsc_dmastop()\n"); 252 dev->sc_dmatimo = 0; 253 #endif 254 if (dev->sc_dmacmd) { 255 s = splbio(); 256 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 257 /* 258 * only FLUSH if terminal count not enabled, 259 * and reading from peripheral 260 */ 261 sdp->FLUSH = 1; 262 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 263 ; 264 } 265 /* 266 * clear possible interrupt and stop dma 267 */ 268 sdp->CINT = 1; 269 sdp->SP_DMA = 1; 270 dev->sc_dmacmd = 0; 271 splx(s); 272 } 273 } 274 275 int 276 ahsc_dmaintr() 277 { 278 volatile struct sdmac *sdp; 279 struct sbic_softc *dev; 280 int i, stat, found; 281 282 found = 0; 283 for (i = 0; i < ahsccd.cd_ndevs; i++) { 284 dev = ahsccd.cd_devs[i]; 285 if (dev == NULL) 286 continue; 287 sdp = dev->sc_cregs; 288 stat = sdp->ISTR; 289 290 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 291 continue; 292 293 #ifdef DEBUG 294 if (ahsc_dmadebug & DDB_FOLLOW) 295 printf("ahsc_dmaintr (%d, 0x%x)\n", i, stat); 296 #endif 297 298 /* 299 * both, SCSI and DMA interrupts arrive here. I chose 300 * arbitrarily that DMA interrupts should have higher 301 * precedence than SCSI interrupts. 302 */ 303 if (stat & ISTR_E_INT) { 304 found++; 305 306 sdp->CINT = 1; /* clear possible interrupt */ 307 308 /* 309 * check for SCSI ints in the same go and 310 * eventually save an interrupt 311 */ 312 } 313 314 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 315 found += sbicintr(dev); 316 } 317 return(found); 318 } 319 320 321 int 322 ahsc_dmanext(dev) 323 struct sbic_softc *dev; 324 { 325 volatile struct sdmac *sdp; 326 int i, stat; 327 328 sdp = dev->sc_cregs; 329 330 if (dev->sc_cur > dev->sc_last) { 331 /* shouldn't happen !! */ 332 printf("ahsc_dmanext at end !!!\n"); 333 ahsc_dmastop(dev); 334 return(0); 335 } 336 #ifdef DEBUG 337 dev->sc_dmatimo = 1; 338 #endif 339 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 340 /* 341 * only FLUSH if terminal count not enabled, 342 * and reading from peripheral 343 */ 344 sdp->FLUSH = 1; 345 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 346 ; 347 } 348 /* 349 * clear possible interrupt and stop dma 350 */ 351 sdp->CINT = 1; /* clear possible interrupt */ 352 sdp->SP_DMA = 1; /* stop dma */ 353 sdp->CNTR = dev->sc_dmacmd; 354 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 355 sdp->ST_DMA = 1; 356 357 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 358 return(dev->sc_tcnt); 359 } 360 361 #ifdef DEBUG 362 /*ARGSUSED*/ 363 void 364 ahsc_dmatimeout(arg) 365 void *arg; 366 { 367 struct sbic_softc *dev; 368 int i, s; 369 370 for (i = 0; i < ahsccd.cd_ndevs; i++) { 371 dev = ahsccd.cd_devs[i]; 372 if (dev == NULL) 373 continue; 374 375 s = splbio(); 376 if (dev->sc_dmatimo) { 377 if (dev->sc_dmatimo > 1) 378 printf("ahsc_dma%d: timeout #%d\n", 379 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 380 dev->sc_dmatimo++; 381 } 382 splx(s); 383 } 384 timeout(ahsc_dmatimeout, 0, 30 * hz); 385 } 386 #endif 387
Indexes created Tue Sep 30 20:09:53 GMT 2025