atzsc.c revision 1.25
1 /* $NetBSD: atzsc.c,v 1.25 1998/08/21 19:13:28 is 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 <dev/scsipi/scsi_all.h> 43 #include <dev/scsipi/scsipi_all.h> 44 #include <dev/scsipi/scsiconf.h> 45 #include <amiga/amiga/custom.h> 46 #include <amiga/amiga/cc.h> 47 #include <amiga/amiga/device.h> 48 #include <amiga/amiga/isr.h> 49 #include <amiga/dev/dmavar.h> 50 #include <amiga/dev/sbicreg.h> 51 #include <amiga/dev/sbicvar.h> 52 #include <amiga/dev/atzscreg.h> 53 #include <amiga/dev/zbusvar.h> 54 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((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 scsipi_adapter atzsc_scsiswitch = { 69 sbic_scsicmd, 70 sbic_minphys, 71 0, /* no lun support */ 72 0, /* no lun support */ 73 }; 74 75 struct scsipi_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 /* 92 * if we are an A3000 we are here. 93 */ 94 int 95 atzscmatch(pdp, cfp, auxp) 96 struct device *pdp; 97 struct cfdata *cfp; 98 void *auxp; 99 { 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_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 158 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 159 160 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.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 165 sc->sc_link.adapter_softc = sc; 166 sc->sc_link.scsipi_scsi.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.scsipi_scsi.max_target = 7; 171 sc->sc_link.type = BUS_SCSI; 172 173 sbicinit(sc); 174 175 sc->sc_isr.isr_intr = atzsc_dmaintr; 176 sc->sc_isr.isr_arg = sc; 177 sc->sc_isr.isr_ipl = 2; 178 add_isr (&sc->sc_isr); 179 180 /* 181 * attach all scsi units on us 182 */ 183 config_found(dp, &sc->sc_link, scsiprint); 184 } 185 186 void 187 atzsc_enintr(dev) 188 struct sbic_softc *dev; 189 { 190 volatile struct sdmac *sdp; 191 192 sdp = dev->sc_cregs; 193 194 dev->sc_flags |= SBICF_INTR; 195 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 196 } 197 198 int 199 atzsc_dmago(dev, addr, count, flags) 200 struct sbic_softc *dev; 201 char *addr; 202 int count, flags; 203 { 204 volatile struct sdmac *sdp; 205 206 sdp = dev->sc_cregs; 207 /* 208 * Set up the command word based on flags 209 */ 210 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 211 if ((flags & DMAGO_READ) == 0) 212 dev->sc_dmacmd |= CNTR_DDIR; 213 #ifdef DEBUG 214 if (atzsc_dmadebug & DDB_IO) 215 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 216 #endif 217 218 dev->sc_flags |= SBICF_INTR; 219 sdp->CNTR = dev->sc_dmacmd; 220 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 221 sdp->ST_DMA = 1; 222 223 return(dev->sc_tcnt); 224 } 225 226 void 227 atzsc_dmastop(dev) 228 struct sbic_softc *dev; 229 { 230 volatile struct sdmac *sdp; 231 int s; 232 233 sdp = dev->sc_cregs; 234 235 #ifdef DEBUG 236 if (atzsc_dmadebug & DDB_FOLLOW) 237 printf("atzsc_dmastop()\n"); 238 #endif 239 if (dev->sc_dmacmd) { 240 s = splbio(); 241 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 242 /* 243 * only FLUSH if terminal count not enabled, 244 * and reading from peripheral 245 */ 246 sdp->FLUSH = 1; 247 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 248 ; 249 } 250 /* 251 * clear possible interrupt and stop dma 252 */ 253 sdp->CINT = 1; 254 sdp->SP_DMA = 1; 255 dev->sc_dmacmd = 0; 256 splx(s); 257 } 258 } 259 260 int 261 atzsc_dmaintr(arg) 262 void *arg; 263 { 264 struct sbic_softc *dev = arg; 265 volatile struct sdmac *sdp; 266 int stat, found; 267 268 sdp = dev->sc_cregs; 269 stat = sdp->ISTR; 270 271 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 272 return (0); 273 274 #ifdef DEBUG 275 if (atzsc_dmadebug & DDB_FOLLOW) 276 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 277 #endif 278 279 /* 280 * both, SCSI and DMA interrupts arrive here. I chose 281 * arbitrarily that DMA interrupts should have higher 282 * precedence than SCSI interrupts. 283 */ 284 found = 0; 285 if (stat & ISTR_E_INT) { 286 found++; 287 288 sdp->CINT = 1; /* clear possible interrupt */ 289 290 /* 291 * check for SCSI ints in the same go and 292 * eventually save an interrupt 293 */ 294 } 295 296 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 297 found += sbicintr(dev); 298 return(found); 299 } 300 301 302 int 303 atzsc_dmanext(dev) 304 struct sbic_softc *dev; 305 { 306 volatile struct sdmac *sdp; 307 308 sdp = dev->sc_cregs; 309 310 if (dev->sc_cur > dev->sc_last) { 311 /* shouldn't happen !! */ 312 printf("atzsc_dmanext at end !!!\n"); 313 atzsc_dmastop(dev); 314 return(0); 315 } 316 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 317 /* 318 * only FLUSH if terminal count not enabled, 319 * and reading from peripheral 320 */ 321 sdp->FLUSH = 1; 322 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 323 ; 324 } 325 /* 326 * clear possible interrupt and stop dma 327 */ 328 sdp->CINT = 1; /* clear possible interrupt */ 329 sdp->SP_DMA = 1; /* stop dma */ 330 sdp->CNTR = dev->sc_dmacmd; 331 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 332 sdp->ST_DMA = 1; 333 334 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 335 return(dev->sc_tcnt); 336 } 337 338 #ifdef DEBUG 339 void 340 atzsc_dump() 341 { 342 extern struct cfdriver atzsc_cd; 343 int i; 344 345 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 346 if (atzsc_cd.cd_devs[i]) 347 sbic_dump(atzsc_cd.cd_devs[i]); 348 } 349 #endif 350
Indexes created Tue Sep 30 20:09:53 GMT 2025