atzsc.c revision 1.15
1 /* $NetBSD: atzsc.c,v 1.15 1996/03/18 04:58:37 mhitch Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 5 * Copyright (c) 1982, 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)dma.c 37 */ 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <scsi/scsi_all.h> 43 #include <scsi/scsiconf.h> 44 #include <amiga/amiga/custom.h> 45 #include <amiga/amiga/cc.h> 46 #include <amiga/amiga/device.h> 47 #include <amiga/amiga/isr.h> 48 #include <amiga/dev/dmavar.h> 49 #include <amiga/dev/sbicreg.h> 50 #include <amiga/dev/sbicvar.h> 51 #include <amiga/dev/atzscreg.h> 52 #include <amiga/dev/zbusvar.h> 53 54 int atzscprint __P((void *auxp, char *)); 55 void atzscattach __P((struct device *, struct device *, void *)); 56 int atzscmatch __P((struct device *, void *, void *)); 57 58 void atzsc_enintr __P((struct sbic_softc *)); 59 void atzsc_dmastop __P((struct sbic_softc *)); 60 int atzsc_dmanext __P((struct sbic_softc *)); 61 int atzsc_dmaintr __P((struct sbic_softc *)); 62 int atzsc_dmago __P((struct sbic_softc *, char *, int, int)); 63 64 struct scsi_adapter atzsc_scsiswitch = { 65 sbic_scsicmd, 66 sbic_minphys, 67 0, /* no lun support */ 68 0, /* no lun support */ 69 }; 70 71 struct scsi_device atzsc_scsidev = { 72 NULL, /* use default error handler */ 73 NULL, /* do not have a start functio */ 74 NULL, /* have no async handler */ 75 NULL, /* Use default done routine */ 76 }; 77 78 79 #ifdef DEBUG 80 int atzsc_dmadebug = 0; 81 #endif 82 83 struct cfattach atzsc_ca = { 84 sizeof(struct sbic_softc), atzscmatch, atzscattach 85 }; 86 87 struct cfdriver atzsc_cd = { 88 NULL, "atzsc", DV_DULL, NULL, 0 89 }; 90 91 /* 92 * if we are an A3000 we are here. 93 */ 94 int 95 atzscmatch(pdp, match, auxp) 96 struct device *pdp; 97 void *match, *auxp; 98 { 99 struct cfdata *cdp = match; 100 struct zbus_args *zap; 101 102 zap = auxp; 103 104 /* 105 * Check manufacturer and product id. 106 * I was informed that older boards can be 2 also. 107 */ 108 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 109 return(1); 110 else 111 return(0); 112 } 113 114 void 115 atzscattach(pdp, dp, auxp) 116 struct device *pdp, *dp; 117 void *auxp; 118 { 119 volatile struct sdmac *rp; 120 struct sbic_softc *sc; 121 struct zbus_args *zap; 122 123 zap = auxp; 124 125 sc = (struct sbic_softc *)dp; 126 sc->sc_cregs = rp = zap->va; 127 /* 128 * disable ints and reset bank register 129 */ 130 rp->CNTR = CNTR_PDMD; 131 rp->DAWR = DAWR_ATZSC; 132 sc->sc_enintr = atzsc_enintr; 133 sc->sc_dmago = atzsc_dmago; 134 sc->sc_dmanext = atzsc_dmanext; 135 sc->sc_dmastop = atzsc_dmastop; 136 sc->sc_dmacmd = 0; 137 138 /* 139 * only 24 bit mem. 140 */ 141 sc->sc_flags |= SBICF_BADDMA; 142 sc->sc_dmamask = ~0x00ffffff; 143 #if 0 144 /* 145 * If the users kva space is not ztwo try and allocate a bounce buffer. 146 * XXX this needs to change if we move to multiple memory segments. 147 */ 148 if (kvtop(sc) & sc->sc_dmamask) { 149 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 150 if (isztwomem(sc->sc_dmabuffer)) 151 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 152 else if (sc->sc_dmabuffer) 153 printf(" bounce pa 0x%x", 154 PREP_DMA_MEM(sc->sc_dmabuffer)); 155 } 156 #endif 157 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 158 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 159 160 printf(": dmamask 0x%x\n", ~sc->sc_dmamask); 161 162 sc->sc_link.adapter_softc = sc; 163 sc->sc_link.adapter_target = 7; 164 sc->sc_link.adapter = &atzsc_scsiswitch; 165 sc->sc_link.device = &atzsc_scsidev; 166 sc->sc_link.openings = 2; 167 168 sbicinit(sc); 169 170 sc->sc_isr.isr_intr = atzsc_dmaintr; 171 sc->sc_isr.isr_arg = sc; 172 sc->sc_isr.isr_ipl = 2; 173 add_isr (&sc->sc_isr); 174 175 /* 176 * attach all scsi units on us 177 */ 178 config_found(dp, &sc->sc_link, atzscprint); 179 } 180 181 /* 182 * print diag if pnp is NULL else just extra 183 */ 184 int 185 atzscprint(auxp, pnp) 186 void *auxp; 187 char *pnp; 188 { 189 if (pnp == NULL) 190 return(UNCONF); 191 return(QUIET); 192 } 193 194 195 void 196 atzsc_enintr(dev) 197 struct sbic_softc *dev; 198 { 199 volatile struct sdmac *sdp; 200 201 sdp = dev->sc_cregs; 202 203 dev->sc_flags |= SBICF_INTR; 204 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 205 } 206 207 int 208 atzsc_dmago(dev, addr, count, flags) 209 struct sbic_softc *dev; 210 char *addr; 211 int count, flags; 212 { 213 volatile struct sdmac *sdp; 214 215 sdp = dev->sc_cregs; 216 /* 217 * Set up the command word based on flags 218 */ 219 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 220 if ((flags & DMAGO_READ) == 0) 221 dev->sc_dmacmd |= CNTR_DDIR; 222 #ifdef DEBUG 223 if (atzsc_dmadebug & DDB_IO) 224 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 225 #endif 226 227 dev->sc_flags |= SBICF_INTR; 228 sdp->CNTR = dev->sc_dmacmd; 229 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 230 sdp->ST_DMA = 1; 231 232 return(dev->sc_tcnt); 233 } 234 235 void 236 atzsc_dmastop(dev) 237 struct sbic_softc *dev; 238 { 239 volatile struct sdmac *sdp; 240 int s; 241 242 sdp = dev->sc_cregs; 243 244 #ifdef DEBUG 245 if (atzsc_dmadebug & DDB_FOLLOW) 246 printf("atzsc_dmastop()\n"); 247 #endif 248 if (dev->sc_dmacmd) { 249 s = splbio(); 250 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 251 /* 252 * only FLUSH if terminal count not enabled, 253 * and reading from peripheral 254 */ 255 sdp->FLUSH = 1; 256 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 257 ; 258 } 259 /* 260 * clear possible interrupt and stop dma 261 */ 262 sdp->CINT = 1; 263 sdp->SP_DMA = 1; 264 dev->sc_dmacmd = 0; 265 splx(s); 266 } 267 } 268 269 int 270 atzsc_dmaintr(dev) 271 struct sbic_softc *dev; 272 { 273 volatile struct sdmac *sdp; 274 int stat, found; 275 276 sdp = dev->sc_cregs; 277 stat = sdp->ISTR; 278 279 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 280 return (0); 281 282 #ifdef DEBUG 283 if (atzsc_dmadebug & DDB_FOLLOW) 284 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 285 #endif 286 287 /* 288 * both, SCSI and DMA interrupts arrive here. I chose 289 * arbitrarily that DMA interrupts should have higher 290 * precedence than SCSI interrupts. 291 */ 292 found = 0; 293 if (stat & ISTR_E_INT) { 294 found++; 295 296 sdp->CINT = 1; /* clear possible interrupt */ 297 298 /* 299 * check for SCSI ints in the same go and 300 * eventually save an interrupt 301 */ 302 } 303 304 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 305 found += sbicintr(dev); 306 return(found); 307 } 308 309 310 int 311 atzsc_dmanext(dev) 312 struct sbic_softc *dev; 313 { 314 volatile struct sdmac *sdp; 315 int i, stat; 316 317 sdp = dev->sc_cregs; 318 319 if (dev->sc_cur > dev->sc_last) { 320 /* shouldn't happen !! */ 321 printf("atzsc_dmanext at end !!!\n"); 322 atzsc_dmastop(dev); 323 return(0); 324 } 325 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 326 /* 327 * only FLUSH if terminal count not enabled, 328 * and reading from peripheral 329 */ 330 sdp->FLUSH = 1; 331 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 332 ; 333 } 334 /* 335 * clear possible interrupt and stop dma 336 */ 337 sdp->CINT = 1; /* clear possible interrupt */ 338 sdp->SP_DMA = 1; /* stop dma */ 339 sdp->CNTR = dev->sc_dmacmd; 340 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 341 sdp->ST_DMA = 1; 342 343 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 344 return(dev->sc_tcnt); 345 } 346 347 #ifdef DEBUG 348 void 349 atzsc_dump() 350 { 351 int i; 352 353 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 354 if (atzsc_cd.cd_devs[i]) 355 sbic_dump(atzsc_cd.cd_devs[i]); 356 } 357 #endif 358
Indexes created Tue Sep 30 20:09:53 GMT 2025