ahsc.c revision 1.9
1 /* $NetBSD: ahsc.c,v 1.9 1995/08/18 15:27:48 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((struct sbic_softc *)); 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((void *)ahsc_dmatimeout, sc, 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 sc->sc_link.adapter_softc = sc; 140 sc->sc_link.adapter_target = 7; 141 sc->sc_link.adapter = &ahsc_scsiswitch; 142 sc->sc_link.device = &ahsc_scsidev; 143 sc->sc_link.openings = 2; 144 145 sbicinit(sc); 146 147 sc->sc_isr.isr_intr = ahsc_dmaintr; 148 sc->sc_isr.isr_arg = sc; 149 sc->sc_isr.isr_ipl = 2; 150 add_isr (&sc->sc_isr); 151 152 /* 153 * attach all scsi units on us 154 */ 155 config_found(dp, &sc->sc_link, ahscprint); 156 } 157 158 /* 159 * print diag if pnp is NULL else just extra 160 */ 161 int 162 ahscprint(auxp, pnp) 163 void *auxp; 164 char *pnp; 165 { 166 if (pnp == NULL) 167 return(UNCONF); 168 return(QUIET); 169 } 170 171 172 void 173 ahsc_dmafree(dev) 174 struct sbic_softc *dev; 175 { 176 volatile struct sdmac *sdp; 177 int s; 178 179 sdp = dev->sc_cregs; 180 181 s = splbio(); 182 #ifdef DEBUG 183 dev->sc_dmatimo = 0; 184 #endif 185 if (dev->sc_dmacmd) { 186 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 187 /* 188 * only FLUSH if terminal count not enabled, 189 * and reading from peripheral 190 */ 191 sdp->FLUSH = 1; 192 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 193 ; 194 } 195 /* 196 * clear possible interrupt and stop dma 197 */ 198 sdp->CINT = 1; 199 sdp->SP_DMA = 1; 200 dev->sc_dmacmd = 0; 201 } 202 /* 203 * disable interrupts 204 */ 205 sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ 206 dev->sc_flags &= ~SBICF_INTR; 207 splx(s); 208 } 209 210 int 211 ahsc_dmago(dev, addr, count, flags) 212 struct sbic_softc *dev; 213 char *addr; 214 int count, flags; 215 { 216 volatile struct sdmac *sdp; 217 218 sdp = dev->sc_cregs; 219 /* 220 * Set up the command word based on flags 221 */ 222 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 223 if ((flags & DMAGO_READ) == 0) 224 dev->sc_dmacmd |= CNTR_DDIR; 225 #ifdef DEBUG 226 if (ahsc_dmadebug & DDB_IO) 227 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 228 dev->sc_dmatimo = 1; 229 #endif 230 231 dev->sc_flags |= SBICF_INTR; 232 sdp->CNTR = dev->sc_dmacmd; 233 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 234 sdp->ST_DMA = 1; 235 236 return(dev->sc_tcnt); 237 } 238 239 void 240 ahsc_dmastop(dev) 241 struct sbic_softc *dev; 242 { 243 volatile struct sdmac *sdp; 244 int s; 245 246 sdp = dev->sc_cregs; 247 248 #ifdef DEBUG 249 if (ahsc_dmadebug & DDB_FOLLOW) 250 printf("ahsc_dmastop()\n"); 251 dev->sc_dmatimo = 0; 252 #endif 253 if (dev->sc_dmacmd) { 254 s = splbio(); 255 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 256 /* 257 * only FLUSH if terminal count not enabled, 258 * and reading from peripheral 259 */ 260 sdp->FLUSH = 1; 261 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 262 ; 263 } 264 /* 265 * clear possible interrupt and stop dma 266 */ 267 sdp->CINT = 1; 268 sdp->SP_DMA = 1; 269 dev->sc_dmacmd = 0; 270 splx(s); 271 } 272 } 273 274 int 275 ahsc_dmaintr(dev) 276 struct sbic_softc *dev; 277 { 278 volatile struct sdmac *sdp; 279 int stat, found; 280 281 sdp = dev->sc_cregs; 282 stat = sdp->ISTR; 283 284 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 285 return (0); 286 287 #ifdef DEBUG 288 if (ahsc_dmadebug & DDB_FOLLOW) 289 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 290 #endif 291 292 /* 293 * both, SCSI and DMA interrupts arrive here. I chose 294 * arbitrarily that DMA interrupts should have higher 295 * precedence than SCSI interrupts. 296 */ 297 found = 0; 298 if (stat & ISTR_E_INT) { 299 ++found; 300 301 sdp->CINT = 1; /* clear possible interrupt */ 302 303 /* 304 * check for SCSI ints in the same go and 305 * eventually save an interrupt 306 */ 307 } 308 309 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 310 found += sbicintr(dev); 311 return(found); 312 } 313 314 315 int 316 ahsc_dmanext(dev) 317 struct sbic_softc *dev; 318 { 319 volatile struct sdmac *sdp; 320 int i, stat; 321 322 sdp = dev->sc_cregs; 323 324 if (dev->sc_cur > dev->sc_last) { 325 /* shouldn't happen !! */ 326 printf("ahsc_dmanext at end !!!\n"); 327 ahsc_dmastop(dev); 328 return(0); 329 } 330 #ifdef DEBUG 331 dev->sc_dmatimo = 1; 332 #endif 333 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 334 /* 335 * only FLUSH if terminal count not enabled, 336 * and reading from peripheral 337 */ 338 sdp->FLUSH = 1; 339 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 340 ; 341 } 342 /* 343 * clear possible interrupt and stop dma 344 */ 345 sdp->CINT = 1; /* clear possible interrupt */ 346 sdp->SP_DMA = 1; /* stop dma */ 347 sdp->CNTR = dev->sc_dmacmd; 348 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 349 sdp->ST_DMA = 1; 350 351 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 352 return(dev->sc_tcnt); 353 } 354 355 #ifdef DEBUG 356 /*ARGSUSED*/ 357 void 358 ahsc_dmatimeout(sc) 359 struct sbic_softc *sc; 360 { 361 int s; 362 363 s = splbio(); 364 if (sc->sc_dmatimo) { 365 if (sc->sc_dmatimo > 1) 366 printf("%s: dma timeout #%d\n", 367 sc->sc_dev.dv_xname, sc->sc_dmatimo - 1); 368 sc->sc_dmatimo++; 369 } 370 splx(s); 371 timeout((void *)ahsc_dmatimeout, sc, 30 * hz); 372 } 373 #endif 374
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