atzsc.c revision 1.43
1 /* $NetBSD: atzsc.c,v 1.43 2012/10/27 17:17:27 chs 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: atzsc.c,v 1.43 2012/10/27 17:17:27 chs Exp $"); 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/kernel.h> 74 #include <sys/device.h> 75 #include <sys/intr.h> 76 #include <machine/cpu.h> 77 #include <dev/scsipi/scsi_all.h> 78 #include <dev/scsipi/scsipi_all.h> 79 #include <dev/scsipi/scsiconf.h> 80 #include <amiga/amiga/custom.h> 81 #include <amiga/amiga/cc.h> 82 #include <amiga/amiga/device.h> 83 #include <amiga/amiga/isr.h> 84 #include <amiga/dev/dmavar.h> 85 #include <amiga/dev/sbicreg.h> 86 #include <amiga/dev/sbicvar.h> 87 #include <amiga/dev/atzscreg.h> 88 #include <amiga/dev/zbusvar.h> 89 90 void atzscattach(device_t, device_t, void *); 91 int atzscmatch(device_t, cfdata_t, void *); 92 93 void atzsc_enintr(struct sbic_softc *); 94 void atzsc_dmastop(struct sbic_softc *); 95 int atzsc_dmanext(struct sbic_softc *); 96 int atzsc_dmaintr(void *); 97 int atzsc_dmago(struct sbic_softc *, char *, int, int); 98 99 #ifdef DEBUG 100 void atzsc_dump(void); 101 #endif 102 103 #ifdef DEBUG 104 int atzsc_dmadebug = 0; 105 #endif 106 107 CFATTACH_DECL_NEW(atzsc, sizeof(struct sbic_softc), 108 atzscmatch, atzscattach, NULL, NULL); 109 110 /* 111 * if we are a A2091 SCSI 112 */ 113 int 114 atzscmatch(device_t parent, cfdata_t cf, void *aux) 115 { 116 struct zbus_args *zap; 117 118 zap = aux; 119 120 /* 121 * Check manufacturer and product id. 122 * I was informed that older boards can be 2 also. 123 */ 124 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 125 return(1); 126 else 127 return(0); 128 } 129 130 void 131 atzscattach(device_t parent, device_t self, void *aux) 132 { 133 volatile struct sdmac *rp; 134 struct sbic_softc *sc = device_private(self); 135 struct zbus_args *zap; 136 struct scsipi_adapter *adapt = &sc->sc_adapter; 137 struct scsipi_channel *chan = &sc->sc_channel; 138 139 zap = aux; 140 141 sc->sc_dev = self; 142 sc->sc_cregs = rp = zap->va; 143 /* 144 * disable ints and reset bank register 145 */ 146 rp->CNTR = CNTR_PDMD; 147 amiga_membarrier(); 148 rp->DAWR = DAWR_ATZSC; 149 amiga_membarrier(); 150 sc->sc_enintr = atzsc_enintr; 151 sc->sc_dmago = atzsc_dmago; 152 sc->sc_dmanext = atzsc_dmanext; 153 sc->sc_dmastop = atzsc_dmastop; 154 sc->sc_dmacmd = 0; 155 156 /* 157 * only 24 bit mem. 158 */ 159 sc->sc_flags |= SBICF_BADDMA; 160 sc->sc_dmamask = ~0x00ffffff; 161 #if 0 162 /* 163 * If the users kva space is not ztwo try and allocate a bounce buffer. 164 * XXX this needs to change if we move to multiple memory segments. 165 */ 166 if (kvtop(sc) & sc->sc_dmamask) { 167 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 168 if (isztwomem(sc->sc_dmabuffer)) 169 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 170 else if (sc->sc_dmabuffer) 171 printf(" bounce pa 0x%x", 172 PREP_DMA_MEM(sc->sc_dmabuffer)); 173 } 174 #endif 175 sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 176 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 177 178 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 179 180 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 181 182 /* 183 * Fill in the scsipi_adapter. 184 */ 185 memset(adapt, 0, sizeof(*adapt)); 186 adapt->adapt_dev = self; 187 adapt->adapt_nchannels = 1; 188 adapt->adapt_openings = 7; 189 adapt->adapt_max_periph = 1; 190 adapt->adapt_request = sbic_scsipi_request; 191 adapt->adapt_minphys = sbic_minphys; 192 193 /* 194 * Fill in the scsipi_channel. 195 */ 196 memset(chan, 0, sizeof(*chan)); 197 chan->chan_adapter = adapt; 198 chan->chan_bustype = &scsi_bustype; 199 chan->chan_channel = 0; 200 chan->chan_ntargets = 8; 201 chan->chan_nluns = 8; 202 chan->chan_id = 7; 203 204 sbicinit(sc); 205 206 sc->sc_isr.isr_intr = atzsc_dmaintr; 207 sc->sc_isr.isr_arg = sc; 208 sc->sc_isr.isr_ipl = 2; 209 add_isr (&sc->sc_isr); 210 211 /* 212 * attach all scsi units on us 213 */ 214 config_found(self, chan, scsiprint); 215 } 216 217 void 218 atzsc_enintr(struct sbic_softc *dev) 219 { 220 volatile struct sdmac *sdp; 221 222 sdp = dev->sc_cregs; 223 224 dev->sc_flags |= SBICF_INTR; 225 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 226 amiga_membarrier(); 227 } 228 229 int 230 atzsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 231 { 232 volatile struct sdmac *sdp; 233 234 sdp = dev->sc_cregs; 235 /* 236 * Set up the command word based on flags 237 */ 238 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 239 if ((flags & DMAGO_READ) == 0) 240 dev->sc_dmacmd |= CNTR_DDIR; 241 #ifdef DEBUG 242 if (atzsc_dmadebug & DDB_IO) 243 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 244 #endif 245 246 dev->sc_flags |= SBICF_INTR; 247 sdp->CNTR = dev->sc_dmacmd; 248 amiga_membarrier(); 249 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 250 amiga_membarrier(); 251 sdp->ST_DMA = 1; 252 amiga_membarrier(); 253 254 return(dev->sc_tcnt); 255 } 256 257 void 258 atzsc_dmastop(struct sbic_softc *dev) 259 { 260 volatile struct sdmac *sdp; 261 int s; 262 vu_short istr; 263 264 sdp = dev->sc_cregs; 265 266 #ifdef DEBUG 267 if (atzsc_dmadebug & DDB_FOLLOW) 268 printf("atzsc_dmastop()\n"); 269 #endif 270 if (dev->sc_dmacmd) { 271 s = splbio(); 272 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 273 /* 274 * only FLUSH if terminal count not enabled, 275 * and reading from peripheral 276 */ 277 sdp->FLUSH = 1; 278 amiga_membarrier(); 279 do { 280 istr = sdp->ISTR; 281 amiga_membarrier(); 282 } while ((istr & ISTR_FE_FLG) == 0); 283 } 284 /* 285 * clear possible interrupt and stop DMA 286 */ 287 sdp->CINT = 1; 288 amiga_membarrier(); 289 sdp->SP_DMA = 1; 290 amiga_membarrier(); 291 dev->sc_dmacmd = 0; 292 splx(s); 293 } 294 } 295 296 int 297 atzsc_dmaintr(void *arg) 298 { 299 struct sbic_softc *dev = arg; 300 volatile struct sdmac *sdp; 301 int stat, found; 302 303 sdp = dev->sc_cregs; 304 stat = sdp->ISTR; 305 306 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 307 return (0); 308 309 #ifdef DEBUG 310 if (atzsc_dmadebug & DDB_FOLLOW) 311 printf("%s: dmaintr 0x%x\n", device_xname(dev->sc_dev), stat); 312 #endif 313 314 /* 315 * both, SCSI and DMA interrupts arrive here. I chose 316 * arbitrarily that DMA interrupts should have higher 317 * precedence than SCSI interrupts. 318 */ 319 found = 0; 320 if (stat & ISTR_E_INT) { 321 found++; 322 323 sdp->CINT = 1; /* clear possible interrupt */ 324 amiga_membarrier(); 325 326 /* 327 * check for SCSI ints in the same go and 328 * eventually save an interrupt 329 */ 330 } 331 332 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 333 found += sbicintr(dev); 334 return(found); 335 } 336 337 338 int 339 atzsc_dmanext(struct sbic_softc *dev) 340 { 341 volatile struct sdmac *sdp; 342 vu_short istr; 343 344 sdp = dev->sc_cregs; 345 346 if (dev->sc_cur > dev->sc_last) { 347 /* shouldn't happen !! */ 348 printf("atzsc_dmanext at end !!!\n"); 349 atzsc_dmastop(dev); 350 return(0); 351 } 352 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 353 /* 354 * only FLUSH if terminal count not enabled, 355 * and reading from peripheral 356 */ 357 sdp->FLUSH = 1; 358 amiga_membarrier(); 359 do { 360 istr = sdp->ISTR; 361 amiga_membarrier(); 362 } while ((istr & ISTR_FE_FLG) == 0); 363 } 364 /* 365 * clear possible interrupt and stop DMA 366 */ 367 sdp->CINT = 1; /* clear possible interrupt */ 368 amiga_membarrier(); 369 sdp->SP_DMA = 1; /* stop DMA */ 370 amiga_membarrier(); 371 sdp->CNTR = dev->sc_dmacmd; 372 amiga_membarrier(); 373 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 374 amiga_membarrier(); 375 sdp->ST_DMA = 1; 376 amiga_membarrier(); 377 378 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 379 return(dev->sc_tcnt); 380 } 381 382 #ifdef DEBUG 383 void 384 atzsc_dump(void) 385 { 386 extern struct cfdriver atzsc_cd; 387 struct sbic_softc *sc; 388 int i; 389 390 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) { 391 sc = device_lookup_private(&atzsc_cd, i); 392 if (sc != NULL) 393 sbic_dump(sc); 394 } 395 } 396 #endif 397
Indexes created Tue Sep 30 17:09:57 GMT 2025