atzsc.c revision 1.23.4.1
1 /* $NetBSD: atzsc.c,v 1.23.4.1 1999/01/19 07:24:19 cgd 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 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, cfp, auxp) 100 struct device *pdp; 101 struct cfdata *cfp; 102 void *auxp; 103 { 104 struct zbus_args *zap; 105 106 zap = auxp; 107 108 /* 109 * Check manufacturer and product id. 110 * I was informed that older boards can be 2 also. 111 */ 112 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 113 return(1); 114 else 115 return(0); 116 } 117 118 void 119 atzscattach(pdp, dp, auxp) 120 struct device *pdp, *dp; 121 void *auxp; 122 { 123 volatile struct sdmac *rp; 124 struct sbic_softc *sc; 125 struct zbus_args *zap; 126 127 zap = auxp; 128 129 sc = (struct sbic_softc *)dp; 130 sc->sc_cregs = rp = zap->va; 131 /* 132 * disable ints and reset bank register 133 */ 134 rp->CNTR = CNTR_PDMD; 135 rp->DAWR = DAWR_ATZSC; 136 sc->sc_enintr = atzsc_enintr; 137 sc->sc_dmago = atzsc_dmago; 138 sc->sc_dmanext = atzsc_dmanext; 139 sc->sc_dmastop = atzsc_dmastop; 140 sc->sc_dmacmd = 0; 141 142 /* 143 * only 24 bit mem. 144 */ 145 sc->sc_flags |= SBICF_BADDMA; 146 sc->sc_dmamask = ~0x00ffffff; 147 #if 0 148 /* 149 * If the users kva space is not ztwo try and allocate a bounce buffer. 150 * XXX this needs to change if we move to multiple memory segments. 151 */ 152 if (kvtop(sc) & sc->sc_dmamask) { 153 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 154 if (isztwomem(sc->sc_dmabuffer)) 155 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 156 else if (sc->sc_dmabuffer) 157 printf(" bounce pa 0x%x", 158 PREP_DMA_MEM(sc->sc_dmabuffer)); 159 } 160 #endif 161 sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 162 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 163 164 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 165 166 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 167 168 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 169 sc->sc_link.adapter_softc = sc; 170 sc->sc_link.scsipi_scsi.adapter_target = 7; 171 sc->sc_link.adapter = &atzsc_scsiswitch; 172 sc->sc_link.device = &atzsc_scsidev; 173 sc->sc_link.openings = 2; 174 sc->sc_link.scsipi_scsi.max_target = 7; 175 sc->sc_link.type = BUS_SCSI; 176 177 sbicinit(sc); 178 179 sc->sc_isr.isr_intr = atzsc_dmaintr; 180 sc->sc_isr.isr_arg = sc; 181 sc->sc_isr.isr_ipl = 2; 182 add_isr (&sc->sc_isr); 183 184 /* 185 * attach all scsi units on us 186 */ 187 config_found(dp, &sc->sc_link, scsiprint); 188 } 189 190 void 191 atzsc_enintr(dev) 192 struct sbic_softc *dev; 193 { 194 volatile struct sdmac *sdp; 195 196 sdp = dev->sc_cregs; 197 198 dev->sc_flags |= SBICF_INTR; 199 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 200 } 201 202 int 203 atzsc_dmago(dev, addr, count, flags) 204 struct sbic_softc *dev; 205 char *addr; 206 int count, flags; 207 { 208 volatile struct sdmac *sdp; 209 210 sdp = dev->sc_cregs; 211 /* 212 * Set up the command word based on flags 213 */ 214 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 215 if ((flags & DMAGO_READ) == 0) 216 dev->sc_dmacmd |= CNTR_DDIR; 217 #ifdef DEBUG 218 if (atzsc_dmadebug & DDB_IO) 219 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 220 #endif 221 222 dev->sc_flags |= SBICF_INTR; 223 sdp->CNTR = dev->sc_dmacmd; 224 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 225 sdp->ST_DMA = 1; 226 227 return(dev->sc_tcnt); 228 } 229 230 void 231 atzsc_dmastop(dev) 232 struct sbic_softc *dev; 233 { 234 volatile struct sdmac *sdp; 235 int s; 236 237 sdp = dev->sc_cregs; 238 239 #ifdef DEBUG 240 if (atzsc_dmadebug & DDB_FOLLOW) 241 printf("atzsc_dmastop()\n"); 242 #endif 243 if (dev->sc_dmacmd) { 244 s = splbio(); 245 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 246 /* 247 * only FLUSH if terminal count not enabled, 248 * and reading from peripheral 249 */ 250 sdp->FLUSH = 1; 251 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 252 ; 253 } 254 /* 255 * clear possible interrupt and stop dma 256 */ 257 sdp->CINT = 1; 258 sdp->SP_DMA = 1; 259 dev->sc_dmacmd = 0; 260 splx(s); 261 } 262 } 263 264 int 265 atzsc_dmaintr(arg) 266 void *arg; 267 { 268 struct sbic_softc *dev = arg; 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; 311 312 sdp = dev->sc_cregs; 313 314 if (dev->sc_cur > dev->sc_last) { 315 /* shouldn't happen !! */ 316 printf("atzsc_dmanext at end !!!\n"); 317 atzsc_dmastop(dev); 318 return(0); 319 } 320 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 321 /* 322 * only FLUSH if terminal count not enabled, 323 * and reading from peripheral 324 */ 325 sdp->FLUSH = 1; 326 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 327 ; 328 } 329 /* 330 * clear possible interrupt and stop dma 331 */ 332 sdp->CINT = 1; /* clear possible interrupt */ 333 sdp->SP_DMA = 1; /* stop dma */ 334 sdp->CNTR = dev->sc_dmacmd; 335 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 336 sdp->ST_DMA = 1; 337 338 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 339 return(dev->sc_tcnt); 340 } 341 342 #ifdef DEBUG 343 void 344 atzsc_dump() 345 { 346 int i; 347 348 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 349 if (atzsc_cd.cd_devs[i]) 350 sbic_dump(atzsc_cd.cd_devs[i]); 351 } 352 #endif 353
Indexes created Sun Oct 12 09:09:55 GMT 2025