atzsc.c revision 1.20
1 /* $NetBSD: atzsc.c,v 1.20 1996/10/13 03:06:48 christos 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; 170 171 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, scsiprint); 182 } 183 184 void 185 atzsc_enintr(dev) 186 struct sbic_softc *dev; 187 { 188 volatile struct sdmac *sdp; 189 190 sdp = dev->sc_cregs; 191 192 dev->sc_flags |= SBICF_INTR; 193 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 194 } 195 196 int 197 atzsc_dmago(dev, addr, count, flags) 198 struct sbic_softc *dev; 199 char *addr; 200 int count, flags; 201 { 202 volatile struct sdmac *sdp; 203 204 sdp = dev->sc_cregs; 205 /* 206 * Set up the command word based on flags 207 */ 208 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 209 if ((flags & DMAGO_READ) == 0) 210 dev->sc_dmacmd |= CNTR_DDIR; 211 #ifdef DEBUG 212 if (atzsc_dmadebug & DDB_IO) 213 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 214 #endif 215 216 dev->sc_flags |= SBICF_INTR; 217 sdp->CNTR = dev->sc_dmacmd; 218 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 219 sdp->ST_DMA = 1; 220 221 return(dev->sc_tcnt); 222 } 223 224 void 225 atzsc_dmastop(dev) 226 struct sbic_softc *dev; 227 { 228 volatile struct sdmac *sdp; 229 int s; 230 231 sdp = dev->sc_cregs; 232 233 #ifdef DEBUG 234 if (atzsc_dmadebug & DDB_FOLLOW) 235 printf("atzsc_dmastop()\n"); 236 #endif 237 if (dev->sc_dmacmd) { 238 s = splbio(); 239 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 240 /* 241 * only FLUSH if terminal count not enabled, 242 * and reading from peripheral 243 */ 244 sdp->FLUSH = 1; 245 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 246 ; 247 } 248 /* 249 * clear possible interrupt and stop dma 250 */ 251 sdp->CINT = 1; 252 sdp->SP_DMA = 1; 253 dev->sc_dmacmd = 0; 254 splx(s); 255 } 256 } 257 258 int 259 atzsc_dmaintr(arg) 260 void *arg; 261 { 262 struct sbic_softc *dev = arg; 263 volatile struct sdmac *sdp; 264 int stat, found; 265 266 sdp = dev->sc_cregs; 267 stat = sdp->ISTR; 268 269 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 270 return (0); 271 272 #ifdef DEBUG 273 if (atzsc_dmadebug & DDB_FOLLOW) 274 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 275 #endif 276 277 /* 278 * both, SCSI and DMA interrupts arrive here. I chose 279 * arbitrarily that DMA interrupts should have higher 280 * precedence than SCSI interrupts. 281 */ 282 found = 0; 283 if (stat & ISTR_E_INT) { 284 found++; 285 286 sdp->CINT = 1; /* clear possible interrupt */ 287 288 /* 289 * check for SCSI ints in the same go and 290 * eventually save an interrupt 291 */ 292 } 293 294 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 295 found += sbicintr(dev); 296 return(found); 297 } 298 299 300 int 301 atzsc_dmanext(dev) 302 struct sbic_softc *dev; 303 { 304 volatile struct sdmac *sdp; 305 306 sdp = dev->sc_cregs; 307 308 if (dev->sc_cur > dev->sc_last) { 309 /* shouldn't happen !! */ 310 printf("atzsc_dmanext at end !!!\n"); 311 atzsc_dmastop(dev); 312 return(0); 313 } 314 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 315 /* 316 * only FLUSH if terminal count not enabled, 317 * and reading from peripheral 318 */ 319 sdp->FLUSH = 1; 320 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 321 ; 322 } 323 /* 324 * clear possible interrupt and stop dma 325 */ 326 sdp->CINT = 1; /* clear possible interrupt */ 327 sdp->SP_DMA = 1; /* stop dma */ 328 sdp->CNTR = dev->sc_dmacmd; 329 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 330 sdp->ST_DMA = 1; 331 332 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 333 return(dev->sc_tcnt); 334 } 335 336 #ifdef DEBUG 337 void 338 atzsc_dump() 339 { 340 int i; 341 342 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 343 if (atzsc_cd.cd_devs[i]) 344 sbic_dump(atzsc_cd.cd_devs[i]); 345 } 346 #endif 347
Indexes created Tue Sep 30 17:09:57 GMT 2025