atzsc.c revision 1.13
1 /* $NetBSD: atzsc.c,v 1.13 1995/09/04 13:04:42 chopps 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 *, struct cfdata *, 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 cfdriver atzsccd = { 84 NULL, "atzsc", (cfmatch_t)atzscmatch, atzscattach, 85 DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; 86 87 /* 88 * if we are an A3000 we are here. 89 */ 90 int 91 atzscmatch(pdp, cdp, auxp) 92 struct device *pdp; 93 struct cfdata *cdp; 94 void *auxp; 95 { 96 struct zbus_args *zap; 97 98 zap = auxp; 99 100 /* 101 * Check manufacturer and product id. 102 * I was informed that older boards can be 2 also. 103 */ 104 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 105 return(1); 106 else 107 return(0); 108 } 109 110 void 111 atzscattach(pdp, dp, auxp) 112 struct device *pdp, *dp; 113 void *auxp; 114 { 115 volatile struct sdmac *rp; 116 struct sbic_softc *sc; 117 struct zbus_args *zap; 118 119 zap = auxp; 120 121 sc = (struct sbic_softc *)dp; 122 sc->sc_cregs = rp = zap->va; 123 /* 124 * disable ints and reset bank register 125 */ 126 rp->CNTR = CNTR_PDMD; 127 rp->DAWR = DAWR_ATZSC; 128 sc->sc_enintr = atzsc_enintr; 129 sc->sc_dmago = atzsc_dmago; 130 sc->sc_dmanext = atzsc_dmanext; 131 sc->sc_dmastop = atzsc_dmastop; 132 sc->sc_dmacmd = 0; 133 134 /* 135 * only 24 bit mem. 136 */ 137 sc->sc_flags |= SBICF_BADDMA; 138 sc->sc_dmamask = ~0x00ffffff; 139 #if 0 140 /* 141 * If the users kva space is not ztwo try and allocate a bounce buffer. 142 * XXX this needs to change if we move to multiple memory segments. 143 */ 144 if (kvtop(sc) & sc->sc_dmamask) { 145 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 146 if (isztwomem(sc->sc_dmabuffer)) 147 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 148 else if (sc->sc_dmabuffer) 149 printf(" bounce pa 0x%x", 150 PREP_DMA_MEM(sc->sc_dmabuffer)); 151 } 152 #endif 153 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 154 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 155 156 printf(": dmamask 0x%x\n", ~sc->sc_dmamask); 157 158 sc->sc_link.adapter_softc = sc; 159 sc->sc_link.adapter_target = 7; 160 sc->sc_link.adapter = &atzsc_scsiswitch; 161 sc->sc_link.device = &atzsc_scsidev; 162 sc->sc_link.openings = 2; 163 164 sbicinit(sc); 165 166 sc->sc_isr.isr_intr = atzsc_dmaintr; 167 sc->sc_isr.isr_arg = sc; 168 sc->sc_isr.isr_ipl = 2; 169 add_isr (&sc->sc_isr); 170 171 /* 172 * attach all scsi units on us 173 */ 174 config_found(dp, &sc->sc_link, atzscprint); 175 } 176 177 /* 178 * print diag if pnp is NULL else just extra 179 */ 180 int 181 atzscprint(auxp, pnp) 182 void *auxp; 183 char *pnp; 184 { 185 if (pnp == NULL) 186 return(UNCONF); 187 return(QUIET); 188 } 189 190 191 void 192 atzsc_enintr(dev) 193 struct sbic_softc *dev; 194 { 195 volatile struct sdmac *sdp; 196 197 sdp = dev->sc_cregs; 198 199 dev->sc_flags |= SBICF_INTR; 200 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 201 } 202 203 int 204 atzsc_dmago(dev, addr, count, flags) 205 struct sbic_softc *dev; 206 char *addr; 207 int count, flags; 208 { 209 volatile struct sdmac *sdp; 210 211 sdp = dev->sc_cregs; 212 /* 213 * Set up the command word based on flags 214 */ 215 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 216 if ((flags & DMAGO_READ) == 0) 217 dev->sc_dmacmd |= CNTR_DDIR; 218 #ifdef DEBUG 219 if (atzsc_dmadebug & DDB_IO) 220 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 221 #endif 222 223 dev->sc_flags |= SBICF_INTR; 224 sdp->CNTR = dev->sc_dmacmd; 225 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 226 sdp->ST_DMA = 1; 227 228 return(dev->sc_tcnt); 229 } 230 231 void 232 atzsc_dmastop(dev) 233 struct sbic_softc *dev; 234 { 235 volatile struct sdmac *sdp; 236 int s; 237 238 sdp = dev->sc_cregs; 239 240 #ifdef DEBUG 241 if (atzsc_dmadebug & DDB_FOLLOW) 242 printf("atzsc_dmastop()\n"); 243 #endif 244 if (dev->sc_dmacmd) { 245 s = splbio(); 246 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 247 /* 248 * only FLUSH if terminal count not enabled, 249 * and reading from peripheral 250 */ 251 sdp->FLUSH = 1; 252 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 253 ; 254 } 255 /* 256 * clear possible interrupt and stop dma 257 */ 258 sdp->CINT = 1; 259 sdp->SP_DMA = 1; 260 dev->sc_dmacmd = 0; 261 splx(s); 262 } 263 } 264 265 int 266 atzsc_dmaintr(dev) 267 struct sbic_softc *dev; 268 { 269 volatile struct sdmac *sdp; 270 int stat, found; 271 272 sdp = dev->sc_cregs; 273 stat = sdp->ISTR; 274 275 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 276 return (0); 277 278 #ifdef DEBUG 279 if (atzsc_dmadebug & DDB_FOLLOW) 280 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 281 #endif 282 283 /* 284 * both, SCSI and DMA interrupts arrive here. I chose 285 * arbitrarily that DMA interrupts should have higher 286 * precedence than SCSI interrupts. 287 */ 288 found = 0; 289 if (stat & ISTR_E_INT) { 290 found++; 291 292 sdp->CINT = 1; /* clear possible interrupt */ 293 294 /* 295 * check for SCSI ints in the same go and 296 * eventually save an interrupt 297 */ 298 } 299 300 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 301 found += sbicintr(dev); 302 return(found); 303 } 304 305 306 int 307 atzsc_dmanext(dev) 308 struct sbic_softc *dev; 309 { 310 volatile struct sdmac *sdp; 311 int i, stat; 312 313 sdp = dev->sc_cregs; 314 315 if (dev->sc_cur > dev->sc_last) { 316 /* shouldn't happen !! */ 317 printf("atzsc_dmanext at end !!!\n"); 318 atzsc_dmastop(dev); 319 return(0); 320 } 321 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 322 /* 323 * only FLUSH if terminal count not enabled, 324 * and reading from peripheral 325 */ 326 sdp->FLUSH = 1; 327 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 328 ; 329 } 330 /* 331 * clear possible interrupt and stop dma 332 */ 333 sdp->CINT = 1; /* clear possible interrupt */ 334 sdp->SP_DMA = 1; /* stop dma */ 335 sdp->CNTR = dev->sc_dmacmd; 336 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 337 sdp->ST_DMA = 1; 338 339 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 340 return(dev->sc_tcnt); 341 } 342 343 #ifdef DEBUG 344 void 345 atzsc_dump() 346 { 347 int i; 348 349 for (i = 0; i < atzsccd.cd_ndevs; ++i) 350 if (atzsccd.cd_devs[i]) 351 sbic_dump(atzsccd.cd_devs[i]); 352 } 353 #endif 354
Indexes created Tue Sep 30 20:09:53 GMT 2025