atzsc.c revision 1.35
1 /* $NetBSD: atzsc.c,v 1.35 2003/08/07 16:26:40 agc 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 1.35 2003/08/07 16:26:40 agc 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/device.h> 81 #include <amiga/amiga/isr.h> 82 #include <amiga/dev/dmavar.h> 83 #include <amiga/dev/sbicreg.h> 84 #include <amiga/dev/sbicvar.h> 85 #include <amiga/dev/atzscreg.h> 86 #include <amiga/dev/zbusvar.h> 87 88 void atzscattach(struct device *, struct device *, void *); 89 int atzscmatch(struct device *, struct cfdata *, void *); 90 91 void atzsc_enintr(struct sbic_softc *); 92 void atzsc_dmastop(struct sbic_softc *); 93 int atzsc_dmanext(struct sbic_softc *); 94 int atzsc_dmaintr(void *); 95 int atzsc_dmago(struct sbic_softc *, char *, int, int); 96 97 #ifdef DEBUG 98 void atzsc_dump(void); 99 #endif 100 101 #ifdef DEBUG 102 int atzsc_dmadebug = 0; 103 #endif 104 105 CFATTACH_DECL(atzsc, sizeof(struct sbic_softc), 106 atzscmatch, atzscattach, NULL, NULL); 107 108 /* 109 * if we are an A3000 we are here. 110 */ 111 int 112 atzscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 113 { 114 struct zbus_args *zap; 115 116 zap = auxp; 117 118 /* 119 * Check manufacturer and product id. 120 * I was informed that older boards can be 2 also. 121 */ 122 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 123 return(1); 124 else 125 return(0); 126 } 127 128 void 129 atzscattach(struct device *pdp, struct device *dp, void *auxp) 130 { 131 volatile struct sdmac *rp; 132 struct sbic_softc *sc = (struct sbic_softc *)dp; 133 struct zbus_args *zap; 134 struct scsipi_adapter *adapt = &sc->sc_adapter; 135 struct scsipi_channel *chan = &sc->sc_channel; 136 137 zap = auxp; 138 139 sc->sc_cregs = rp = zap->va; 140 /* 141 * disable ints and reset bank register 142 */ 143 rp->CNTR = CNTR_PDMD; 144 rp->DAWR = DAWR_ATZSC; 145 sc->sc_enintr = atzsc_enintr; 146 sc->sc_dmago = atzsc_dmago; 147 sc->sc_dmanext = atzsc_dmanext; 148 sc->sc_dmastop = atzsc_dmastop; 149 sc->sc_dmacmd = 0; 150 151 /* 152 * only 24 bit mem. 153 */ 154 sc->sc_flags |= SBICF_BADDMA; 155 sc->sc_dmamask = ~0x00ffffff; 156 #if 0 157 /* 158 * If the users kva space is not ztwo try and allocate a bounce buffer. 159 * XXX this needs to change if we move to multiple memory segments. 160 */ 161 if (kvtop(sc) & sc->sc_dmamask) { 162 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 163 if (isztwomem(sc->sc_dmabuffer)) 164 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 165 else if (sc->sc_dmabuffer) 166 printf(" bounce pa 0x%x", 167 PREP_DMA_MEM(sc->sc_dmabuffer)); 168 } 169 #endif 170 sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 171 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 172 173 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 174 175 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 176 177 /* 178 * Fill in the scsipi_adapter. 179 */ 180 memset(adapt, 0, sizeof(*adapt)); 181 adapt->adapt_dev = &sc->sc_dev; 182 adapt->adapt_nchannels = 1; 183 adapt->adapt_openings = 7; 184 adapt->adapt_max_periph = 1; 185 adapt->adapt_request = sbic_scsipi_request; 186 adapt->adapt_minphys = sbic_minphys; 187 188 /* 189 * Fill in the scsipi_channel. 190 */ 191 memset(chan, 0, sizeof(*chan)); 192 chan->chan_adapter = adapt; 193 chan->chan_bustype = &scsi_bustype; 194 chan->chan_channel = 0; 195 chan->chan_ntargets = 8; 196 chan->chan_nluns = 8; 197 chan->chan_id = 7; 198 199 sbicinit(sc); 200 201 sc->sc_isr.isr_intr = atzsc_dmaintr; 202 sc->sc_isr.isr_arg = sc; 203 sc->sc_isr.isr_ipl = 2; 204 add_isr (&sc->sc_isr); 205 206 /* 207 * attach all scsi units on us 208 */ 209 config_found(dp, chan, scsiprint); 210 } 211 212 void 213 atzsc_enintr(struct sbic_softc *dev) 214 { 215 volatile struct sdmac *sdp; 216 217 sdp = dev->sc_cregs; 218 219 dev->sc_flags |= SBICF_INTR; 220 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 221 } 222 223 int 224 atzsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 225 { 226 volatile struct sdmac *sdp; 227 228 sdp = dev->sc_cregs; 229 /* 230 * Set up the command word based on flags 231 */ 232 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 233 if ((flags & DMAGO_READ) == 0) 234 dev->sc_dmacmd |= CNTR_DDIR; 235 #ifdef DEBUG 236 if (atzsc_dmadebug & DDB_IO) 237 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 238 #endif 239 240 dev->sc_flags |= SBICF_INTR; 241 sdp->CNTR = dev->sc_dmacmd; 242 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 243 sdp->ST_DMA = 1; 244 245 return(dev->sc_tcnt); 246 } 247 248 void 249 atzsc_dmastop(struct sbic_softc *dev) 250 { 251 volatile struct sdmac *sdp; 252 int s; 253 254 sdp = dev->sc_cregs; 255 256 #ifdef DEBUG 257 if (atzsc_dmadebug & DDB_FOLLOW) 258 printf("atzsc_dmastop()\n"); 259 #endif 260 if (dev->sc_dmacmd) { 261 s = splbio(); 262 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 263 /* 264 * only FLUSH if terminal count not enabled, 265 * and reading from peripheral 266 */ 267 sdp->FLUSH = 1; 268 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 269 ; 270 } 271 /* 272 * clear possible interrupt and stop DMA 273 */ 274 sdp->CINT = 1; 275 sdp->SP_DMA = 1; 276 dev->sc_dmacmd = 0; 277 splx(s); 278 } 279 } 280 281 int 282 atzsc_dmaintr(void *arg) 283 { 284 struct sbic_softc *dev = arg; 285 volatile struct sdmac *sdp; 286 int stat, found; 287 288 sdp = dev->sc_cregs; 289 stat = sdp->ISTR; 290 291 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 292 return (0); 293 294 #ifdef DEBUG 295 if (atzsc_dmadebug & DDB_FOLLOW) 296 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 297 #endif 298 299 /* 300 * both, SCSI and DMA interrupts arrive here. I chose 301 * arbitrarily that DMA interrupts should have higher 302 * precedence than SCSI interrupts. 303 */ 304 found = 0; 305 if (stat & ISTR_E_INT) { 306 found++; 307 308 sdp->CINT = 1; /* clear possible interrupt */ 309 310 /* 311 * check for SCSI ints in the same go and 312 * eventually save an interrupt 313 */ 314 } 315 316 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 317 found += sbicintr(dev); 318 return(found); 319 } 320 321 322 int 323 atzsc_dmanext(struct sbic_softc *dev) 324 { 325 volatile struct sdmac *sdp; 326 327 sdp = dev->sc_cregs; 328 329 if (dev->sc_cur > dev->sc_last) { 330 /* shouldn't happen !! */ 331 printf("atzsc_dmanext at end !!!\n"); 332 atzsc_dmastop(dev); 333 return(0); 334 } 335 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 336 /* 337 * only FLUSH if terminal count not enabled, 338 * and reading from peripheral 339 */ 340 sdp->FLUSH = 1; 341 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 342 ; 343 } 344 /* 345 * clear possible interrupt and stop DMA 346 */ 347 sdp->CINT = 1; /* clear possible interrupt */ 348 sdp->SP_DMA = 1; /* stop DMA */ 349 sdp->CNTR = dev->sc_dmacmd; 350 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 351 sdp->ST_DMA = 1; 352 353 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 354 return(dev->sc_tcnt); 355 } 356 357 #ifdef DEBUG 358 void 359 atzsc_dump(void) 360 { 361 extern struct cfdriver atzsc_cd; 362 int i; 363 364 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 365 if (atzsc_cd.cd_devs[i]) 366 sbic_dump(atzsc_cd.cd_devs[i]); 367 } 368 #endif 369
Indexes created Tue Sep 30 17:09:57 GMT 2025