atzsc.c revision 1.16
1 /* $NetBSD: atzsc.c,v 1.16 1996/04/21 21:10:51 veego 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((void *)); 62 int atzsc_dmago __P((struct sbic_softc *, char *, int, int)); 63 64 #ifdef DEBUG 65 void atzsc_dump __P((void)); 66 #endif 67 68 struct scsi_adapter atzsc_scsiswitch = { 69 sbic_scsicmd, 70 sbic_minphys, 71 0, /* no lun support */ 72 0, /* no lun support */ 73 }; 74 75 struct scsi_device atzsc_scsidev = { 76 NULL, /* use default error handler */ 77 NULL, /* do not have a start functio */ 78 NULL, /* have no async handler */ 79 NULL, /* Use default done routine */ 80 }; 81 82 83 #ifdef DEBUG 84 int atzsc_dmadebug = 0; 85 #endif 86 87 struct cfattach atzsc_ca = { 88 sizeof(struct sbic_softc), atzscmatch, atzscattach 89 }; 90 91 struct cfdriver atzsc_cd = { 92 NULL, "atzsc", DV_DULL, NULL, 0 93 }; 94 95 /* 96 * if we are an A3000 we are here. 97 */ 98 int 99 atzscmatch(pdp, match, auxp) 100 struct device *pdp; 101 void *match, *auxp; 102 { 103 struct zbus_args *zap; 104 105 zap = auxp; 106 107 /* 108 * Check manufacturer and product id. 109 * I was informed that older boards can be 2 also. 110 */ 111 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 112 return(1); 113 else 114 return(0); 115 } 116 117 void 118 atzscattach(pdp, dp, auxp) 119 struct device *pdp, *dp; 120 void *auxp; 121 { 122 volatile struct sdmac *rp; 123 struct sbic_softc *sc; 124 struct zbus_args *zap; 125 126 zap = auxp; 127 128 sc = (struct sbic_softc *)dp; 129 sc->sc_cregs = rp = zap->va; 130 /* 131 * disable ints and reset bank register 132 */ 133 rp->CNTR = CNTR_PDMD; 134 rp->DAWR = DAWR_ATZSC; 135 sc->sc_enintr = atzsc_enintr; 136 sc->sc_dmago = atzsc_dmago; 137 sc->sc_dmanext = atzsc_dmanext; 138 sc->sc_dmastop = atzsc_dmastop; 139 sc->sc_dmacmd = 0; 140 141 /* 142 * only 24 bit mem. 143 */ 144 sc->sc_flags |= SBICF_BADDMA; 145 sc->sc_dmamask = ~0x00ffffff; 146 #if 0 147 /* 148 * If the users kva space is not ztwo try and allocate a bounce buffer. 149 * XXX this needs to change if we move to multiple memory segments. 150 */ 151 if (kvtop(sc) & sc->sc_dmamask) { 152 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 153 if (isztwomem(sc->sc_dmabuffer)) 154 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 155 else if (sc->sc_dmabuffer) 156 printf(" bounce pa 0x%x", 157 PREP_DMA_MEM(sc->sc_dmabuffer)); 158 } 159 #endif 160 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 161 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 162 163 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 164 165 sc->sc_link.adapter_softc = sc; 166 sc->sc_link.adapter_target = 7; 167 sc->sc_link.adapter = &atzsc_scsiswitch; 168 sc->sc_link.device = &atzsc_scsidev; 169 sc->sc_link.openings = 2; 170 171 sbicinit(sc); 172 173 sc->sc_isr.isr_intr = atzsc_dmaintr; 174 sc->sc_isr.isr_arg = sc; 175 sc->sc_isr.isr_ipl = 2; 176 add_isr (&sc->sc_isr); 177 178 /* 179 * attach all scsi units on us 180 */ 181 config_found(dp, &sc->sc_link, atzscprint); 182 } 183 184 /* 185 * print diag if pnp is NULL else just extra 186 */ 187 int 188 atzscprint(auxp, pnp) 189 void *auxp; 190 char *pnp; 191 { 192 if (pnp == NULL) 193 return(UNCONF); 194 return(QUIET); 195 } 196 197 198 void 199 atzsc_enintr(dev) 200 struct sbic_softc *dev; 201 { 202 volatile struct sdmac *sdp; 203 204 sdp = dev->sc_cregs; 205 206 dev->sc_flags |= SBICF_INTR; 207 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 208 } 209 210 int 211 atzsc_dmago(dev, addr, count, flags) 212 struct sbic_softc *dev; 213 char *addr; 214 int count, flags; 215 { 216 volatile struct sdmac *sdp; 217 218 sdp = dev->sc_cregs; 219 /* 220 * Set up the command word based on flags 221 */ 222 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 223 if ((flags & DMAGO_READ) == 0) 224 dev->sc_dmacmd |= CNTR_DDIR; 225 #ifdef DEBUG 226 if (atzsc_dmadebug & DDB_IO) 227 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 228 #endif 229 230 dev->sc_flags |= SBICF_INTR; 231 sdp->CNTR = dev->sc_dmacmd; 232 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 233 sdp->ST_DMA = 1; 234 235 return(dev->sc_tcnt); 236 } 237 238 void 239 atzsc_dmastop(dev) 240 struct sbic_softc *dev; 241 { 242 volatile struct sdmac *sdp; 243 int s; 244 245 sdp = dev->sc_cregs; 246 247 #ifdef DEBUG 248 if (atzsc_dmadebug & DDB_FOLLOW) 249 printf("atzsc_dmastop()\n"); 250 #endif 251 if (dev->sc_dmacmd) { 252 s = splbio(); 253 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 254 /* 255 * only FLUSH if terminal count not enabled, 256 * and reading from peripheral 257 */ 258 sdp->FLUSH = 1; 259 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 260 ; 261 } 262 /* 263 * clear possible interrupt and stop dma 264 */ 265 sdp->CINT = 1; 266 sdp->SP_DMA = 1; 267 dev->sc_dmacmd = 0; 268 splx(s); 269 } 270 } 271 272 int 273 atzsc_dmaintr(arg) 274 void *arg; 275 { 276 struct sbic_softc *dev = arg; 277 volatile struct sdmac *sdp; 278 int stat, found; 279 280 sdp = dev->sc_cregs; 281 stat = sdp->ISTR; 282 283 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 284 return (0); 285 286 #ifdef DEBUG 287 if (atzsc_dmadebug & DDB_FOLLOW) 288 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 289 #endif 290 291 /* 292 * both, SCSI and DMA interrupts arrive here. I chose 293 * arbitrarily that DMA interrupts should have higher 294 * precedence than SCSI interrupts. 295 */ 296 found = 0; 297 if (stat & ISTR_E_INT) { 298 found++; 299 300 sdp->CINT = 1; /* clear possible interrupt */ 301 302 /* 303 * check for SCSI ints in the same go and 304 * eventually save an interrupt 305 */ 306 } 307 308 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 309 found += sbicintr(dev); 310 return(found); 311 } 312 313 314 int 315 atzsc_dmanext(dev) 316 struct sbic_softc *dev; 317 { 318 volatile struct sdmac *sdp; 319 320 sdp = dev->sc_cregs; 321 322 if (dev->sc_cur > dev->sc_last) { 323 /* shouldn't happen !! */ 324 printf("atzsc_dmanext at end !!!\n"); 325 atzsc_dmastop(dev); 326 return(0); 327 } 328 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 329 /* 330 * only FLUSH if terminal count not enabled, 331 * and reading from peripheral 332 */ 333 sdp->FLUSH = 1; 334 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 335 ; 336 } 337 /* 338 * clear possible interrupt and stop dma 339 */ 340 sdp->CINT = 1; /* clear possible interrupt */ 341 sdp->SP_DMA = 1; /* stop dma */ 342 sdp->CNTR = dev->sc_dmacmd; 343 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 344 sdp->ST_DMA = 1; 345 346 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 347 return(dev->sc_tcnt); 348 } 349 350 #ifdef DEBUG 351 void 352 atzsc_dump() 353 { 354 int i; 355 356 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 357 if (atzsc_cd.cd_devs[i]) 358 sbic_dump(atzsc_cd.cd_devs[i]); 359 } 360 #endif 361
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