ahsc.c revision 1.40
1 /* $NetBSD: ahsc.c,v 1.40 2021/08/07 16:18:41 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)dma.c 32 */ 33 34 /* 35 * Copyright (c) 1994 Christian E. Hopps 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)dma.c 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: ahsc.c,v 1.40 2021/08/07 16:18:41 thorpej Exp $"); 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/kernel.h> 74 #include <sys/device.h> 75 #include <dev/scsipi/scsi_all.h> 76 #include <dev/scsipi/scsipi_all.h> 77 #include <dev/scsipi/scsiconf.h> 78 #include <amiga/amiga/custom.h> 79 #include <amiga/amiga/cc.h> 80 #include <amiga/amiga/cfdev.h> 81 #include <amiga/amiga/device.h> 82 #include <amiga/amiga/isr.h> 83 #include <amiga/dev/dmavar.h> 84 #include <amiga/dev/sbicreg.h> 85 #include <amiga/dev/sbicvar.h> 86 #include <amiga/dev/ahscreg.h> 87 #include <amiga/dev/zbusvar.h> 88 89 #include <machine/cpu.h> 90 91 void ahscattach(device_t, device_t, void *); 92 int ahscmatch(device_t, cfdata_t, void *); 93 94 void ahsc_enintr(struct sbic_softc *); 95 void ahsc_dmastop(struct sbic_softc *); 96 int ahsc_dmanext(struct sbic_softc *); 97 int ahsc_dmaintr(void *); 98 int ahsc_dmago(struct sbic_softc *, char *, int, int); 99 100 #ifdef DEBUG 101 void ahsc_dump(void); 102 #endif 103 104 #ifdef DEBUG 105 int ahsc_dmadebug = 0; 106 #endif 107 108 CFATTACH_DECL_NEW(ahsc, sizeof(struct sbic_softc), 109 ahscmatch, ahscattach, NULL, NULL); 110 111 /* 112 * if we are an A3000 we are here. 113 */ 114 int 115 ahscmatch(device_t parent, cfdata_t cf, void *aux) 116 { 117 118 if (is_a3000() && matchname(aux, "ahsc")) 119 return(1); 120 return(0); 121 } 122 123 void 124 ahscattach(device_t parent, device_t self, void *aux) 125 { 126 volatile struct sdmac *rp; 127 struct sbic_softc *sc = device_private(self); 128 struct cfdev *cdp, *ecdp; 129 struct scsipi_adapter *adapt = &sc->sc_adapter; 130 struct scsipi_channel *chan = &sc->sc_channel; 131 132 sc->sc_dev = self; 133 134 ecdp = &cfdev[ncfdev]; 135 136 for (cdp = cfdev; cdp < ecdp; cdp++) { 137 if (cdp->rom.manid == 8738 && 138 cdp->rom.prodid == 35) 139 break; 140 } 141 142 sc->sc_cregs = rp = ztwomap(0xdd0000); 143 /* 144 * disable ints and reset bank register 145 */ 146 rp->CNTR = CNTR_PDMD; 147 amiga_membarrier(); 148 rp->DAWR = DAWR_AHSC; 149 amiga_membarrier(); 150 sc->sc_enintr = ahsc_enintr; 151 sc->sc_dmago = ahsc_dmago; 152 sc->sc_dmanext = ahsc_dmanext; 153 sc->sc_dmastop = ahsc_dmastop; 154 sc->sc_dmacmd = 0; 155 156 /* 157 * everything is a valid DMA address 158 */ 159 sc->sc_dmamask = 0; 160 161 if (cdp < ecdp) { 162 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x43); 163 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x47); 164 printf(": modified for Apollo CPU board\n"); 165 } else { 166 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x41); 167 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x43); 168 printf("\n"); 169 } 170 171 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 172 173 /* 174 * Fill in the scsipi_adapter. 175 */ 176 memset(adapt, 0, sizeof(*adapt)); 177 adapt->adapt_dev = self; 178 adapt->adapt_nchannels = 1; 179 adapt->adapt_openings = 7; 180 adapt->adapt_max_periph = 1; 181 adapt->adapt_request = sbic_scsipi_request; 182 adapt->adapt_minphys = sbic_minphys; 183 184 /* 185 * Fill in the scsipi_channel. 186 */ 187 memset(chan, 0, sizeof(*chan)); 188 chan->chan_adapter = adapt; 189 chan->chan_bustype = &scsi_bustype; 190 chan->chan_channel = 0; 191 chan->chan_ntargets = 8; 192 chan->chan_nluns = 8; 193 chan->chan_id = 7; 194 195 sbicinit(sc); 196 197 sc->sc_isr.isr_intr = ahsc_dmaintr; 198 sc->sc_isr.isr_arg = sc; 199 sc->sc_isr.isr_ipl = 2; 200 add_isr (&sc->sc_isr); 201 202 /* 203 * attach all scsi units on us 204 */ 205 config_found(self, chan, scsiprint, CFARGS_NONE); 206 } 207 208 void 209 ahsc_enintr(struct sbic_softc *dev) 210 { 211 volatile struct sdmac *sdp; 212 213 sdp = dev->sc_cregs; 214 215 dev->sc_flags |= SBICF_INTR; 216 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 217 amiga_membarrier(); 218 } 219 220 int 221 ahsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 222 { 223 volatile struct sdmac *sdp; 224 225 sdp = dev->sc_cregs; 226 /* 227 * Set up the command word based on flags 228 */ 229 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 230 if ((flags & DMAGO_READ) == 0) 231 dev->sc_dmacmd |= CNTR_DDIR; 232 #ifdef DEBUG 233 if (ahsc_dmadebug & DDB_IO) 234 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 235 #endif 236 237 dev->sc_flags |= SBICF_INTR; 238 sdp->CNTR = dev->sc_dmacmd; 239 amiga_membarrier(); 240 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 241 amiga_membarrier(); 242 sdp->ST_DMA = 1; 243 amiga_membarrier(); 244 245 return(dev->sc_tcnt); 246 } 247 248 void 249 ahsc_dmastop(struct sbic_softc *dev) 250 { 251 volatile struct sdmac *sdp; 252 int s; 253 vu_short istr; 254 255 sdp = dev->sc_cregs; 256 257 #ifdef DEBUG 258 if (ahsc_dmadebug & DDB_FOLLOW) 259 printf("ahsc_dmastop()\n"); 260 #endif 261 if (dev->sc_dmacmd) { 262 s = splbio(); 263 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 264 /* 265 * only FLUSH if terminal count not enabled, 266 * and reading from peripheral 267 */ 268 sdp->FLUSH = 1; 269 amiga_membarrier(); 270 do { 271 istr = sdp->ISTR; 272 amiga_membarrier(); 273 } while ((istr & ISTR_FE_FLG) == 0); 274 } 275 /* 276 * clear possible interrupt and stop DMA 277 */ 278 sdp->CINT = 1; 279 amiga_membarrier(); 280 sdp->SP_DMA = 1; 281 amiga_membarrier(); 282 dev->sc_dmacmd = 0; 283 splx(s); 284 } 285 } 286 287 int 288 ahsc_dmaintr(void *arg) 289 { 290 struct sbic_softc *dev = arg; 291 volatile struct sdmac *sdp; 292 int stat, found; 293 294 sdp = dev->sc_cregs; 295 stat = sdp->ISTR; 296 amiga_membarrier(); 297 298 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 299 return (0); 300 301 #ifdef DEBUG 302 if (ahsc_dmadebug & DDB_FOLLOW) 303 printf("%s: dmaintr 0x%x\n", device_xname(dev->sc_dev), stat); 304 #endif 305 306 /* 307 * both, SCSI and DMA interrupts arrive here. I chose 308 * arbitrarily that DMA interrupts should have higher 309 * precedence than SCSI interrupts. 310 */ 311 found = 0; 312 if (stat & ISTR_E_INT) { 313 ++found; 314 315 sdp->CINT = 1; /* clear possible interrupt */ 316 amiga_membarrier(); 317 318 /* 319 * check for SCSI ints in the same go and 320 * eventually save an interrupt 321 */ 322 } 323 324 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 325 found += sbicintr(dev); 326 return(found); 327 } 328 329 330 int 331 ahsc_dmanext(struct sbic_softc *dev) 332 { 333 volatile struct sdmac *sdp; 334 vu_short istr; 335 336 sdp = dev->sc_cregs; 337 338 if (dev->sc_cur > dev->sc_last) { 339 /* shouldn't happen !! */ 340 printf("ahsc_dmanext at end !!!\n"); 341 ahsc_dmastop(dev); 342 return(0); 343 } 344 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 345 /* 346 * only FLUSH if terminal count not enabled, 347 * and reading from peripheral 348 */ 349 sdp->FLUSH = 1; 350 amiga_membarrier(); 351 do { 352 istr = sdp->ISTR; 353 amiga_membarrier(); 354 } while ((istr & ISTR_FE_FLG) == 0); 355 } 356 /* 357 * clear possible interrupt and stop DMA 358 */ 359 sdp->CINT = 1; /* clear possible interrupt */ 360 amiga_membarrier(); 361 sdp->SP_DMA = 1; /* stop DMA */ 362 amiga_membarrier(); 363 sdp->CNTR = dev->sc_dmacmd; 364 amiga_membarrier(); 365 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 366 amiga_membarrier(); 367 sdp->ST_DMA = 1; 368 amiga_membarrier(); 369 370 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 371 return(dev->sc_tcnt); 372 } 373 374 #ifdef DEBUG 375 void 376 ahsc_dump(void) 377 { 378 extern struct cfdriver ahsc_cd; 379 struct sbic_softc *sc; 380 int i; 381 382 for (i = 0; i < ahsc_cd.cd_ndevs; ++i) { 383 sc = device_lookup_private(&ahsc_cd, i); 384 if (sc != NULL) 385 sbic_dump(sc); 386 } 387 } 388 #endif 389
Indexes created Tue Sep 30 17:09:57 GMT 2025