atzsc.c revision 1.42
1 /* $NetBSD: atzsc.c,v 1.42 2010/02/09 18:13:10 phx 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 1.42 2010/02/09 18:13:10 phx 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(struct device *, struct device *, void *); 91 int atzscmatch(struct device *, struct cfdata *, 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(atzsc, sizeof(struct sbic_softc), 108 atzscmatch, atzscattach, NULL, NULL); 109 110 /* 111 * if we are a A2091 SCSI 112 */ 113 int 114 atzscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 115 { 116 struct zbus_args *zap; 117 118 zap = auxp; 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(struct device *pdp, struct device *dp, void *auxp) 132 { 133 volatile struct sdmac *rp; 134 struct sbic_softc *sc = (struct sbic_softc *)dp; 135 struct zbus_args *zap; 136 struct scsipi_adapter *adapt = &sc->sc_adapter; 137 struct scsipi_channel *chan = &sc->sc_channel; 138 139 zap = auxp; 140 141 sc->sc_cregs = rp = zap->va; 142 /* 143 * disable ints and reset bank register 144 */ 145 rp->CNTR = CNTR_PDMD; 146 amiga_membarrier(); 147 rp->DAWR = DAWR_ATZSC; 148 amiga_membarrier(); 149 sc->sc_enintr = atzsc_enintr; 150 sc->sc_dmago = atzsc_dmago; 151 sc->sc_dmanext = atzsc_dmanext; 152 sc->sc_dmastop = atzsc_dmastop; 153 sc->sc_dmacmd = 0; 154 155 /* 156 * only 24 bit mem. 157 */ 158 sc->sc_flags |= SBICF_BADDMA; 159 sc->sc_dmamask = ~0x00ffffff; 160 #if 0 161 /* 162 * If the users kva space is not ztwo try and allocate a bounce buffer. 163 * XXX this needs to change if we move to multiple memory segments. 164 */ 165 if (kvtop(sc) & sc->sc_dmamask) { 166 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 167 if (isztwomem(sc->sc_dmabuffer)) 168 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 169 else if (sc->sc_dmabuffer) 170 printf(" bounce pa 0x%x", 171 PREP_DMA_MEM(sc->sc_dmabuffer)); 172 } 173 #endif 174 sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 175 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 176 177 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 178 179 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 180 181 /* 182 * Fill in the scsipi_adapter. 183 */ 184 memset(adapt, 0, sizeof(*adapt)); 185 adapt->adapt_dev = &sc->sc_dev; 186 adapt->adapt_nchannels = 1; 187 adapt->adapt_openings = 7; 188 adapt->adapt_max_periph = 1; 189 adapt->adapt_request = sbic_scsipi_request; 190 adapt->adapt_minphys = sbic_minphys; 191 192 /* 193 * Fill in the scsipi_channel. 194 */ 195 memset(chan, 0, sizeof(*chan)); 196 chan->chan_adapter = adapt; 197 chan->chan_bustype = &scsi_bustype; 198 chan->chan_channel = 0; 199 chan->chan_ntargets = 8; 200 chan->chan_nluns = 8; 201 chan->chan_id = 7; 202 203 sbicinit(sc); 204 205 sc->sc_isr.isr_intr = atzsc_dmaintr; 206 sc->sc_isr.isr_arg = sc; 207 sc->sc_isr.isr_ipl = 2; 208 add_isr (&sc->sc_isr); 209 210 /* 211 * attach all scsi units on us 212 */ 213 config_found(dp, chan, scsiprint); 214 } 215 216 void 217 atzsc_enintr(struct sbic_softc *dev) 218 { 219 volatile struct sdmac *sdp; 220 221 sdp = dev->sc_cregs; 222 223 dev->sc_flags |= SBICF_INTR; 224 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 225 amiga_membarrier(); 226 } 227 228 int 229 atzsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 230 { 231 volatile struct sdmac *sdp; 232 233 sdp = dev->sc_cregs; 234 /* 235 * Set up the command word based on flags 236 */ 237 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 238 if ((flags & DMAGO_READ) == 0) 239 dev->sc_dmacmd |= CNTR_DDIR; 240 #ifdef DEBUG 241 if (atzsc_dmadebug & DDB_IO) 242 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 243 #endif 244 245 dev->sc_flags |= SBICF_INTR; 246 sdp->CNTR = dev->sc_dmacmd; 247 amiga_membarrier(); 248 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 249 amiga_membarrier(); 250 sdp->ST_DMA = 1; 251 amiga_membarrier(); 252 253 return(dev->sc_tcnt); 254 } 255 256 void 257 atzsc_dmastop(struct sbic_softc *dev) 258 { 259 volatile struct sdmac *sdp; 260 int s; 261 vu_short istr; 262 263 sdp = dev->sc_cregs; 264 265 #ifdef DEBUG 266 if (atzsc_dmadebug & DDB_FOLLOW) 267 printf("atzsc_dmastop()\n"); 268 #endif 269 if (dev->sc_dmacmd) { 270 s = splbio(); 271 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 272 /* 273 * only FLUSH if terminal count not enabled, 274 * and reading from peripheral 275 */ 276 sdp->FLUSH = 1; 277 amiga_membarrier(); 278 do { 279 istr = sdp->ISTR; 280 amiga_membarrier(); 281 } while ((istr & ISTR_FE_FLG) == 0); 282 } 283 /* 284 * clear possible interrupt and stop DMA 285 */ 286 sdp->CINT = 1; 287 amiga_membarrier(); 288 sdp->SP_DMA = 1; 289 amiga_membarrier(); 290 dev->sc_dmacmd = 0; 291 splx(s); 292 } 293 } 294 295 int 296 atzsc_dmaintr(void *arg) 297 { 298 struct sbic_softc *dev = arg; 299 volatile struct sdmac *sdp; 300 int stat, found; 301 302 sdp = dev->sc_cregs; 303 stat = sdp->ISTR; 304 305 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 306 return (0); 307 308 #ifdef DEBUG 309 if (atzsc_dmadebug & DDB_FOLLOW) 310 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 311 #endif 312 313 /* 314 * both, SCSI and DMA interrupts arrive here. I chose 315 * arbitrarily that DMA interrupts should have higher 316 * precedence than SCSI interrupts. 317 */ 318 found = 0; 319 if (stat & ISTR_E_INT) { 320 found++; 321 322 sdp->CINT = 1; /* clear possible interrupt */ 323 amiga_membarrier(); 324 325 /* 326 * check for SCSI ints in the same go and 327 * eventually save an interrupt 328 */ 329 } 330 331 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 332 found += sbicintr(dev); 333 return(found); 334 } 335 336 337 int 338 atzsc_dmanext(struct sbic_softc *dev) 339 { 340 volatile struct sdmac *sdp; 341 vu_short istr; 342 343 sdp = dev->sc_cregs; 344 345 if (dev->sc_cur > dev->sc_last) { 346 /* shouldn't happen !! */ 347 printf("atzsc_dmanext at end !!!\n"); 348 atzsc_dmastop(dev); 349 return(0); 350 } 351 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 352 /* 353 * only FLUSH if terminal count not enabled, 354 * and reading from peripheral 355 */ 356 sdp->FLUSH = 1; 357 amiga_membarrier(); 358 do { 359 istr = sdp->ISTR; 360 amiga_membarrier(); 361 } while ((istr & ISTR_FE_FLG) == 0); 362 } 363 /* 364 * clear possible interrupt and stop DMA 365 */ 366 sdp->CINT = 1; /* clear possible interrupt */ 367 amiga_membarrier(); 368 sdp->SP_DMA = 1; /* stop DMA */ 369 amiga_membarrier(); 370 sdp->CNTR = dev->sc_dmacmd; 371 amiga_membarrier(); 372 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 373 amiga_membarrier(); 374 sdp->ST_DMA = 1; 375 amiga_membarrier(); 376 377 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 378 return(dev->sc_tcnt); 379 } 380 381 #ifdef DEBUG 382 void 383 atzsc_dump(void) 384 { 385 extern struct cfdriver atzsc_cd; 386 struct sbic_softc *sc; 387 int i; 388 389 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) { 390 sc = device_lookup_private(&atzsc_cd, i); 391 if (sc != NULL) 392 sbic_dump(sc); 393 } 394 } 395 #endif 396
Indexes created Tue Sep 30 17:09:57 GMT 2025