atzsc.c revision 1.38
1 /* $NetBSD: atzsc.c,v 1.38 2008/06/13 08:13:37 cegger 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 1.38 2008/06/13 08:13:37 cegger 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 <dev/scsipi/scsi_all.h> 77 #include <dev/scsipi/scsipi_all.h> 78 #include <dev/scsipi/scsiconf.h> 79 #include <amiga/amiga/custom.h> 80 #include <amiga/amiga/cc.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/atzscreg.h> 87 #include <amiga/dev/zbusvar.h> 88 89 void atzscattach(struct device *, struct device *, void *); 90 int atzscmatch(struct device *, struct cfdata *, void *); 91 92 void atzsc_enintr(struct sbic_softc *); 93 void atzsc_dmastop(struct sbic_softc *); 94 int atzsc_dmanext(struct sbic_softc *); 95 int atzsc_dmaintr(void *); 96 int atzsc_dmago(struct sbic_softc *, char *, int, int); 97 98 #ifdef DEBUG 99 void atzsc_dump(void); 100 #endif 101 102 #ifdef DEBUG 103 int atzsc_dmadebug = 0; 104 #endif 105 106 CFATTACH_DECL(atzsc, sizeof(struct sbic_softc), 107 atzscmatch, atzscattach, NULL, NULL); 108 109 /* 110 * if we are an A3000 we are here. 111 */ 112 int 113 atzscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 114 { 115 struct zbus_args *zap; 116 117 zap = auxp; 118 119 /* 120 * Check manufacturer and product id. 121 * I was informed that older boards can be 2 also. 122 */ 123 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 124 return(1); 125 else 126 return(0); 127 } 128 129 void 130 atzscattach(struct device *pdp, struct device *dp, void *auxp) 131 { 132 volatile struct sdmac *rp; 133 struct sbic_softc *sc = (struct sbic_softc *)dp; 134 struct zbus_args *zap; 135 struct scsipi_adapter *adapt = &sc->sc_adapter; 136 struct scsipi_channel *chan = &sc->sc_channel; 137 138 zap = auxp; 139 140 sc->sc_cregs = rp = zap->va; 141 /* 142 * disable ints and reset bank register 143 */ 144 rp->CNTR = CNTR_PDMD; 145 rp->DAWR = DAWR_ATZSC; 146 sc->sc_enintr = atzsc_enintr; 147 sc->sc_dmago = atzsc_dmago; 148 sc->sc_dmanext = atzsc_dmanext; 149 sc->sc_dmastop = atzsc_dmastop; 150 sc->sc_dmacmd = 0; 151 152 /* 153 * only 24 bit mem. 154 */ 155 sc->sc_flags |= SBICF_BADDMA; 156 sc->sc_dmamask = ~0x00ffffff; 157 #if 0 158 /* 159 * If the users kva space is not ztwo try and allocate a bounce buffer. 160 * XXX this needs to change if we move to multiple memory segments. 161 */ 162 if (kvtop(sc) & sc->sc_dmamask) { 163 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 164 if (isztwomem(sc->sc_dmabuffer)) 165 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 166 else if (sc->sc_dmabuffer) 167 printf(" bounce pa 0x%x", 168 PREP_DMA_MEM(sc->sc_dmabuffer)); 169 } 170 #endif 171 sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 172 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 173 174 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 175 176 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 177 178 /* 179 * Fill in the scsipi_adapter. 180 */ 181 memset(adapt, 0, sizeof(*adapt)); 182 adapt->adapt_dev = &sc->sc_dev; 183 adapt->adapt_nchannels = 1; 184 adapt->adapt_openings = 7; 185 adapt->adapt_max_periph = 1; 186 adapt->adapt_request = sbic_scsipi_request; 187 adapt->adapt_minphys = sbic_minphys; 188 189 /* 190 * Fill in the scsipi_channel. 191 */ 192 memset(chan, 0, sizeof(*chan)); 193 chan->chan_adapter = adapt; 194 chan->chan_bustype = &scsi_bustype; 195 chan->chan_channel = 0; 196 chan->chan_ntargets = 8; 197 chan->chan_nluns = 8; 198 chan->chan_id = 7; 199 200 sbicinit(sc); 201 202 sc->sc_isr.isr_intr = atzsc_dmaintr; 203 sc->sc_isr.isr_arg = sc; 204 sc->sc_isr.isr_ipl = 2; 205 add_isr (&sc->sc_isr); 206 207 /* 208 * attach all scsi units on us 209 */ 210 config_found(dp, chan, scsiprint); 211 } 212 213 void 214 atzsc_enintr(struct sbic_softc *dev) 215 { 216 volatile struct sdmac *sdp; 217 218 sdp = dev->sc_cregs; 219 220 dev->sc_flags |= SBICF_INTR; 221 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 222 } 223 224 int 225 atzsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 226 { 227 volatile struct sdmac *sdp; 228 229 sdp = dev->sc_cregs; 230 /* 231 * Set up the command word based on flags 232 */ 233 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 234 if ((flags & DMAGO_READ) == 0) 235 dev->sc_dmacmd |= CNTR_DDIR; 236 #ifdef DEBUG 237 if (atzsc_dmadebug & DDB_IO) 238 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 239 #endif 240 241 dev->sc_flags |= SBICF_INTR; 242 sdp->CNTR = dev->sc_dmacmd; 243 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 244 sdp->ST_DMA = 1; 245 246 return(dev->sc_tcnt); 247 } 248 249 void 250 atzsc_dmastop(struct sbic_softc *dev) 251 { 252 volatile struct sdmac *sdp; 253 int s; 254 255 sdp = dev->sc_cregs; 256 257 #ifdef DEBUG 258 if (atzsc_dmadebug & DDB_FOLLOW) 259 printf("atzsc_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 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 270 ; 271 } 272 /* 273 * clear possible interrupt and stop DMA 274 */ 275 sdp->CINT = 1; 276 sdp->SP_DMA = 1; 277 dev->sc_dmacmd = 0; 278 splx(s); 279 } 280 } 281 282 int 283 atzsc_dmaintr(void *arg) 284 { 285 struct sbic_softc *dev = arg; 286 volatile struct sdmac *sdp; 287 int stat, found; 288 289 sdp = dev->sc_cregs; 290 stat = sdp->ISTR; 291 292 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 293 return (0); 294 295 #ifdef DEBUG 296 if (atzsc_dmadebug & DDB_FOLLOW) 297 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 298 #endif 299 300 /* 301 * both, SCSI and DMA interrupts arrive here. I chose 302 * arbitrarily that DMA interrupts should have higher 303 * precedence than SCSI interrupts. 304 */ 305 found = 0; 306 if (stat & ISTR_E_INT) { 307 found++; 308 309 sdp->CINT = 1; /* clear possible interrupt */ 310 311 /* 312 * check for SCSI ints in the same go and 313 * eventually save an interrupt 314 */ 315 } 316 317 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 318 found += sbicintr(dev); 319 return(found); 320 } 321 322 323 int 324 atzsc_dmanext(struct sbic_softc *dev) 325 { 326 volatile struct sdmac *sdp; 327 328 sdp = dev->sc_cregs; 329 330 if (dev->sc_cur > dev->sc_last) { 331 /* shouldn't happen !! */ 332 printf("atzsc_dmanext at end !!!\n"); 333 atzsc_dmastop(dev); 334 return(0); 335 } 336 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 337 /* 338 * only FLUSH if terminal count not enabled, 339 * and reading from peripheral 340 */ 341 sdp->FLUSH = 1; 342 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 343 ; 344 } 345 /* 346 * clear possible interrupt and stop DMA 347 */ 348 sdp->CINT = 1; /* clear possible interrupt */ 349 sdp->SP_DMA = 1; /* stop DMA */ 350 sdp->CNTR = dev->sc_dmacmd; 351 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 352 sdp->ST_DMA = 1; 353 354 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 355 return(dev->sc_tcnt); 356 } 357 358 #ifdef DEBUG 359 void 360 atzsc_dump(void) 361 { 362 extern struct cfdriver atzsc_cd; 363 struct sbic_softc *sc; 364 int i; 365 366 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) { 367 sc = device_lookup_private(&atysc_cd, i); 368 if (sc != NULL) 369 sbic_dump(sc); 370 } 371 } 372 #endif 373
Indexes created Tue Sep 30 20:09:53 GMT 2025