ahsc.c revision 1.8
1 /* $NetBSD: ahsc.c,v 1.8 1995/02/12 19:19:01 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/ahscreg.h> 52 #include <amiga/dev/zbusvar.h> 53 54 int ahscprint __P((void *auxp, char *)); 55 void ahscattach __P((struct device *, struct device *, void *)); 56 int ahscmatch __P((struct device *, struct cfdata *, void *)); 57 58 void ahsc_dmafree __P((struct sbic_softc *)); 59 void ahsc_dmastop __P((struct sbic_softc *)); 60 int ahsc_dmanext __P((struct sbic_softc *)); 61 int ahsc_dmaintr __P((struct sbic_softc *)); 62 int ahsc_dmago __P((struct sbic_softc *, char *, int, int)); 63 64 struct scsi_adapter ahsc_scsiswitch = { 65 sbic_scsicmd, 66 sbic_minphys, 67 0, /* no lun support */ 68 0, /* no lun support */ 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 }; 77 78 79 #ifdef DEBUG 80 void ahsc_dmatimeout __P((void *)); 81 int ahsc_dmadebug = 0; 82 #endif 83 84 struct cfdriver ahsccd = { 85 NULL, "ahsc", (cfmatch_t)ahscmatch, ahscattach, 86 DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; 87 88 /* 89 * if we are an A3000 we are here. 90 */ 91 int 92 ahscmatch(pdp, cdp, auxp) 93 struct device *pdp; 94 struct cfdata *cdp; 95 void *auxp; 96 { 97 char *mbusstr; 98 99 mbusstr = auxp; 100 if (is_a3000() && matchname(auxp, "ahsc")) 101 return(1); 102 return(0); 103 } 104 105 void 106 ahscattach(pdp, dp, auxp) 107 struct device *pdp, *dp; 108 void *auxp; 109 { 110 volatile struct sdmac *rp; 111 struct sbic_softc *sc; 112 113 printf("\n"); 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_target = 7; 143 sc->sc_link.adapter = &ahsc_scsiswitch; 144 sc->sc_link.device = &ahsc_scsidev; 145 sc->sc_link.openings = 1; 146 TAILQ_INIT(&sc->sc_xslist); 147 148 sc->sc_isr.isr_intr = ahsc_dmaintr; 149 sc->sc_isr.isr_arg = sc; 150 sc->sc_isr.isr_ipl = 2; 151 add_isr (&sc->sc_isr); 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(dev) 277 struct sbic_softc *dev; 278 { 279 volatile struct sdmac *sdp; 280 int stat, found; 281 282 sdp = dev->sc_cregs; 283 stat = sdp->ISTR; 284 285 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 286 return (0); 287 288 #ifdef DEBUG 289 if (ahsc_dmadebug & DDB_FOLLOW) 290 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 291 #endif 292 293 /* 294 * both, SCSI and DMA interrupts arrive here. I chose 295 * arbitrarily that DMA interrupts should have higher 296 * precedence than SCSI interrupts. 297 */ 298 found = 0; 299 if (stat & ISTR_E_INT) { 300 ++found; 301 302 sdp->CINT = 1; /* clear possible interrupt */ 303 304 /* 305 * check for SCSI ints in the same go and 306 * eventually save an interrupt 307 */ 308 } 309 310 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 311 found += sbicintr(dev); 312 return(found); 313 } 314 315 316 int 317 ahsc_dmanext(dev) 318 struct sbic_softc *dev; 319 { 320 volatile struct sdmac *sdp; 321 int i, stat; 322 323 sdp = dev->sc_cregs; 324 325 if (dev->sc_cur > dev->sc_last) { 326 /* shouldn't happen !! */ 327 printf("ahsc_dmanext at end !!!\n"); 328 ahsc_dmastop(dev); 329 return(0); 330 } 331 #ifdef DEBUG 332 dev->sc_dmatimo = 1; 333 #endif 334 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 335 /* 336 * only FLUSH if terminal count not enabled, 337 * and reading from peripheral 338 */ 339 sdp->FLUSH = 1; 340 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 341 ; 342 } 343 /* 344 * clear possible interrupt and stop dma 345 */ 346 sdp->CINT = 1; /* clear possible interrupt */ 347 sdp->SP_DMA = 1; /* stop dma */ 348 sdp->CNTR = dev->sc_dmacmd; 349 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 350 sdp->ST_DMA = 1; 351 352 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 353 return(dev->sc_tcnt); 354 } 355 356 #ifdef DEBUG 357 /*ARGSUSED*/ 358 void 359 ahsc_dmatimeout(arg) 360 void *arg; 361 { 362 struct sbic_softc *dev; 363 int i, s; 364 365 for (i = 0; i < ahsccd.cd_ndevs; i++) { 366 dev = ahsccd.cd_devs[i]; 367 if (dev == NULL) 368 continue; 369 370 s = splbio(); 371 if (dev->sc_dmatimo) { 372 if (dev->sc_dmatimo > 1) 373 printf("ahsc_dma%d: timeout #%d\n", 374 dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); 375 dev->sc_dmatimo++; 376 } 377 splx(s); 378 } 379 timeout(ahsc_dmatimeout, 0, 30 * hz); 380 } 381 #endif 382
Indexes created Tue Sep 30 20:09:53 GMT 2025