atzsc.c revision 1.21
1 /* $NetBSD: atzsc.c,v 1.21 1996/12/10 21:27:20 thorpej 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 void atzscattach __P((struct device *, struct device *, void *)); 55 int atzscmatch __P((struct device *, void *, void *)); 56 57 void atzsc_enintr __P((struct sbic_softc *)); 58 void atzsc_dmastop __P((struct sbic_softc *)); 59 int atzsc_dmanext __P((struct sbic_softc *)); 60 int atzsc_dmaintr __P((void *)); 61 int atzsc_dmago __P((struct sbic_softc *, char *, int, int)); 62 63 #ifdef DEBUG 64 void atzsc_dump __P((void)); 65 #endif 66 67 struct scsi_adapter atzsc_scsiswitch = { 68 sbic_scsicmd, 69 sbic_minphys, 70 0, /* no lun support */ 71 0, /* no lun support */ 72 }; 73 74 struct scsi_device atzsc_scsidev = { 75 NULL, /* use default error handler */ 76 NULL, /* do not have a start functio */ 77 NULL, /* have no async handler */ 78 NULL, /* Use default done routine */ 79 }; 80 81 82 #ifdef DEBUG 83 int atzsc_dmadebug = 0; 84 #endif 85 86 struct cfattach atzsc_ca = { 87 sizeof(struct sbic_softc), atzscmatch, atzscattach 88 }; 89 90 struct cfdriver atzsc_cd = { 91 NULL, "atzsc", DV_DULL, NULL, 0 92 }; 93 94 /* 95 * if we are an A3000 we are here. 96 */ 97 int 98 atzscmatch(pdp, match, auxp) 99 struct device *pdp; 100 void *match, *auxp; 101 { 102 struct zbus_args *zap; 103 104 zap = auxp; 105 106 /* 107 * Check manufacturer and product id. 108 * I was informed that older boards can be 2 also. 109 */ 110 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 111 return(1); 112 else 113 return(0); 114 } 115 116 void 117 atzscattach(pdp, dp, auxp) 118 struct device *pdp, *dp; 119 void *auxp; 120 { 121 volatile struct sdmac *rp; 122 struct sbic_softc *sc; 123 struct zbus_args *zap; 124 125 zap = auxp; 126 127 sc = (struct sbic_softc *)dp; 128 sc->sc_cregs = rp = zap->va; 129 /* 130 * disable ints and reset bank register 131 */ 132 rp->CNTR = CNTR_PDMD; 133 rp->DAWR = DAWR_ATZSC; 134 sc->sc_enintr = atzsc_enintr; 135 sc->sc_dmago = atzsc_dmago; 136 sc->sc_dmanext = atzsc_dmanext; 137 sc->sc_dmastop = atzsc_dmastop; 138 sc->sc_dmacmd = 0; 139 140 /* 141 * only 24 bit mem. 142 */ 143 sc->sc_flags |= SBICF_BADDMA; 144 sc->sc_dmamask = ~0x00ffffff; 145 #if 0 146 /* 147 * If the users kva space is not ztwo try and allocate a bounce buffer. 148 * XXX this needs to change if we move to multiple memory segments. 149 */ 150 if (kvtop(sc) & sc->sc_dmamask) { 151 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 152 if (isztwomem(sc->sc_dmabuffer)) 153 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 154 else if (sc->sc_dmabuffer) 155 printf(" bounce pa 0x%x", 156 PREP_DMA_MEM(sc->sc_dmabuffer)); 157 } 158 #endif 159 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x91); 160 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 161 162 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 163 164 sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; 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 sc->sc_link.max_target = 7; 171 172 sbicinit(sc); 173 174 sc->sc_isr.isr_intr = atzsc_dmaintr; 175 sc->sc_isr.isr_arg = sc; 176 sc->sc_isr.isr_ipl = 2; 177 add_isr (&sc->sc_isr); 178 179 /* 180 * attach all scsi units on us 181 */ 182 config_found(dp, &sc->sc_link, scsiprint); 183 } 184 185 void 186 atzsc_enintr(dev) 187 struct sbic_softc *dev; 188 { 189 volatile struct sdmac *sdp; 190 191 sdp = dev->sc_cregs; 192 193 dev->sc_flags |= SBICF_INTR; 194 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 195 } 196 197 int 198 atzsc_dmago(dev, addr, count, flags) 199 struct sbic_softc *dev; 200 char *addr; 201 int count, flags; 202 { 203 volatile struct sdmac *sdp; 204 205 sdp = dev->sc_cregs; 206 /* 207 * Set up the command word based on flags 208 */ 209 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 210 if ((flags & DMAGO_READ) == 0) 211 dev->sc_dmacmd |= CNTR_DDIR; 212 #ifdef DEBUG 213 if (atzsc_dmadebug & DDB_IO) 214 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 215 #endif 216 217 dev->sc_flags |= SBICF_INTR; 218 sdp->CNTR = dev->sc_dmacmd; 219 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 220 sdp->ST_DMA = 1; 221 222 return(dev->sc_tcnt); 223 } 224 225 void 226 atzsc_dmastop(dev) 227 struct sbic_softc *dev; 228 { 229 volatile struct sdmac *sdp; 230 int s; 231 232 sdp = dev->sc_cregs; 233 234 #ifdef DEBUG 235 if (atzsc_dmadebug & DDB_FOLLOW) 236 printf("atzsc_dmastop()\n"); 237 #endif 238 if (dev->sc_dmacmd) { 239 s = splbio(); 240 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 241 /* 242 * only FLUSH if terminal count not enabled, 243 * and reading from peripheral 244 */ 245 sdp->FLUSH = 1; 246 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 247 ; 248 } 249 /* 250 * clear possible interrupt and stop dma 251 */ 252 sdp->CINT = 1; 253 sdp->SP_DMA = 1; 254 dev->sc_dmacmd = 0; 255 splx(s); 256 } 257 } 258 259 int 260 atzsc_dmaintr(arg) 261 void *arg; 262 { 263 struct sbic_softc *dev = arg; 264 volatile struct sdmac *sdp; 265 int stat, found; 266 267 sdp = dev->sc_cregs; 268 stat = sdp->ISTR; 269 270 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 271 return (0); 272 273 #ifdef DEBUG 274 if (atzsc_dmadebug & DDB_FOLLOW) 275 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 276 #endif 277 278 /* 279 * both, SCSI and DMA interrupts arrive here. I chose 280 * arbitrarily that DMA interrupts should have higher 281 * precedence than SCSI interrupts. 282 */ 283 found = 0; 284 if (stat & ISTR_E_INT) { 285 found++; 286 287 sdp->CINT = 1; /* clear possible interrupt */ 288 289 /* 290 * check for SCSI ints in the same go and 291 * eventually save an interrupt 292 */ 293 } 294 295 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 296 found += sbicintr(dev); 297 return(found); 298 } 299 300 301 int 302 atzsc_dmanext(dev) 303 struct sbic_softc *dev; 304 { 305 volatile struct sdmac *sdp; 306 307 sdp = dev->sc_cregs; 308 309 if (dev->sc_cur > dev->sc_last) { 310 /* shouldn't happen !! */ 311 printf("atzsc_dmanext at end !!!\n"); 312 atzsc_dmastop(dev); 313 return(0); 314 } 315 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 316 /* 317 * only FLUSH if terminal count not enabled, 318 * and reading from peripheral 319 */ 320 sdp->FLUSH = 1; 321 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 322 ; 323 } 324 /* 325 * clear possible interrupt and stop dma 326 */ 327 sdp->CINT = 1; /* clear possible interrupt */ 328 sdp->SP_DMA = 1; /* stop dma */ 329 sdp->CNTR = dev->sc_dmacmd; 330 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 331 sdp->ST_DMA = 1; 332 333 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 334 return(dev->sc_tcnt); 335 } 336 337 #ifdef DEBUG 338 void 339 atzsc_dump() 340 { 341 int i; 342 343 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 344 if (atzsc_cd.cd_devs[i]) 345 sbic_dump(atzsc_cd.cd_devs[i]); 346 } 347 #endif 348
Indexes created Tue Sep 30 20:09:53 GMT 2025