ahsc.c revision 1.23
1 /* $NetBSD: ahsc.c,v 1.23 1998/10/10 00:28:35 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 <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/cfdev.h> 48 #include <amiga/amiga/device.h> 49 #include <amiga/amiga/isr.h> 50 #include <amiga/dev/dmavar.h> 51 #include <amiga/dev/sbicreg.h> 52 #include <amiga/dev/sbicvar.h> 53 #include <amiga/dev/ahscreg.h> 54 #include <amiga/dev/zbusvar.h> 55 56 void ahscattach __P((struct device *, struct device *, void *)); 57 int ahscmatch __P((struct device *, struct cfdata *, void *)); 58 59 void ahsc_enintr __P((struct sbic_softc *)); 60 void ahsc_dmastop __P((struct sbic_softc *)); 61 int ahsc_dmanext __P((struct sbic_softc *)); 62 int ahsc_dmaintr __P((void *)); 63 int ahsc_dmago __P((struct sbic_softc *, char *, int, int)); 64 65 #ifdef DEBUG 66 void ahsc_dump __P((void)); 67 #endif 68 69 struct scsipi_adapter ahsc_scsiswitch = { 70 sbic_scsicmd, 71 sbic_minphys, 72 NULL, /* scsipi_ioctl */ 73 }; 74 75 struct scsipi_device ahsc_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 ahsc_dmadebug = 0; 85 #endif 86 87 struct cfattach ahsc_ca = { 88 sizeof(struct sbic_softc), ahscmatch, ahscattach 89 }; 90 91 /* 92 * if we are an A3000 we are here. 93 */ 94 int 95 ahscmatch(pdp, cfp, auxp) 96 struct device *pdp; 97 struct cfdata *cfp; 98 void *auxp; 99 { 100 char *mbusstr; 101 102 mbusstr = auxp; 103 if (is_a3000() && matchname(auxp, "ahsc")) 104 return(1); 105 return(0); 106 } 107 108 void 109 ahscattach(pdp, dp, auxp) 110 struct device *pdp, *dp; 111 void *auxp; 112 { 113 volatile struct sdmac *rp; 114 struct sbic_softc *sc; 115 struct cfdev *cdp, *ecdp; 116 117 ecdp = &cfdev[ncfdev]; 118 119 for (cdp = cfdev; cdp < ecdp; cdp++) { 120 if (cdp->rom.manid == 8738 && 121 cdp->rom.prodid == 35) 122 break; 123 } 124 125 sc = (struct sbic_softc *)dp; 126 sc->sc_cregs = rp = ztwomap(0xdd0000); 127 /* 128 * disable ints and reset bank register 129 */ 130 rp->CNTR = CNTR_PDMD; 131 rp->DAWR = DAWR_AHSC; 132 sc->sc_enintr = ahsc_enintr; 133 sc->sc_dmago = ahsc_dmago; 134 sc->sc_dmanext = ahsc_dmanext; 135 sc->sc_dmastop = ahsc_dmastop; 136 sc->sc_dmacmd = 0; 137 138 /* 139 * eveything is a valid dma address 140 */ 141 sc->sc_dmamask = 0; 142 143 if (cdp < ecdp) { 144 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x43); 145 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x47); 146 printf(": modified for Apollo cpu board\n"); 147 } else { 148 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x41); 149 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x43); 150 printf("\n"); 151 } 152 153 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 154 155 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 156 sc->sc_link.adapter_softc = sc; 157 sc->sc_link.scsipi_scsi.adapter_target = 7; 158 sc->sc_link.adapter = &ahsc_scsiswitch; 159 sc->sc_link.device = &ahsc_scsidev; 160 sc->sc_link.openings = 2; 161 sc->sc_link.scsipi_scsi.max_target = 7; 162 sc->sc_link.type = BUS_SCSI; 163 164 sbicinit(sc); 165 166 sc->sc_isr.isr_intr = ahsc_dmaintr; 167 sc->sc_isr.isr_arg = sc; 168 sc->sc_isr.isr_ipl = 2; 169 add_isr (&sc->sc_isr); 170 171 /* 172 * attach all scsi units on us 173 */ 174 config_found(dp, &sc->sc_link, scsiprint); 175 } 176 177 void 178 ahsc_enintr(dev) 179 struct sbic_softc *dev; 180 { 181 volatile struct sdmac *sdp; 182 183 sdp = dev->sc_cregs; 184 185 dev->sc_flags |= SBICF_INTR; 186 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 187 } 188 189 int 190 ahsc_dmago(dev, addr, count, flags) 191 struct sbic_softc *dev; 192 char *addr; 193 int count, flags; 194 { 195 volatile struct sdmac *sdp; 196 197 sdp = dev->sc_cregs; 198 /* 199 * Set up the command word based on flags 200 */ 201 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 202 if ((flags & DMAGO_READ) == 0) 203 dev->sc_dmacmd |= CNTR_DDIR; 204 #ifdef DEBUG 205 if (ahsc_dmadebug & DDB_IO) 206 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 207 #endif 208 209 dev->sc_flags |= SBICF_INTR; 210 sdp->CNTR = dev->sc_dmacmd; 211 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 212 sdp->ST_DMA = 1; 213 214 return(dev->sc_tcnt); 215 } 216 217 void 218 ahsc_dmastop(dev) 219 struct sbic_softc *dev; 220 { 221 volatile struct sdmac *sdp; 222 int s; 223 224 sdp = dev->sc_cregs; 225 226 #ifdef DEBUG 227 if (ahsc_dmadebug & DDB_FOLLOW) 228 printf("ahsc_dmastop()\n"); 229 #endif 230 if (dev->sc_dmacmd) { 231 s = splbio(); 232 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 233 /* 234 * only FLUSH if terminal count not enabled, 235 * and reading from peripheral 236 */ 237 sdp->FLUSH = 1; 238 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 239 ; 240 } 241 /* 242 * clear possible interrupt and stop dma 243 */ 244 sdp->CINT = 1; 245 sdp->SP_DMA = 1; 246 dev->sc_dmacmd = 0; 247 splx(s); 248 } 249 } 250 251 int 252 ahsc_dmaintr(arg) 253 void *arg; 254 { 255 struct sbic_softc *dev = arg; 256 volatile struct sdmac *sdp; 257 int stat, found; 258 259 sdp = dev->sc_cregs; 260 stat = sdp->ISTR; 261 262 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 263 return (0); 264 265 #ifdef DEBUG 266 if (ahsc_dmadebug & DDB_FOLLOW) 267 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 268 #endif 269 270 /* 271 * both, SCSI and DMA interrupts arrive here. I chose 272 * arbitrarily that DMA interrupts should have higher 273 * precedence than SCSI interrupts. 274 */ 275 found = 0; 276 if (stat & ISTR_E_INT) { 277 ++found; 278 279 sdp->CINT = 1; /* clear possible interrupt */ 280 281 /* 282 * check for SCSI ints in the same go and 283 * eventually save an interrupt 284 */ 285 } 286 287 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 288 found += sbicintr(dev); 289 return(found); 290 } 291 292 293 int 294 ahsc_dmanext(dev) 295 struct sbic_softc *dev; 296 { 297 volatile struct sdmac *sdp; 298 299 sdp = dev->sc_cregs; 300 301 if (dev->sc_cur > dev->sc_last) { 302 /* shouldn't happen !! */ 303 printf("ahsc_dmanext at end !!!\n"); 304 ahsc_dmastop(dev); 305 return(0); 306 } 307 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 308 /* 309 * only FLUSH if terminal count not enabled, 310 * and reading from peripheral 311 */ 312 sdp->FLUSH = 1; 313 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 314 ; 315 } 316 /* 317 * clear possible interrupt and stop dma 318 */ 319 sdp->CINT = 1; /* clear possible interrupt */ 320 sdp->SP_DMA = 1; /* stop dma */ 321 sdp->CNTR = dev->sc_dmacmd; 322 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 323 sdp->ST_DMA = 1; 324 325 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 326 return(dev->sc_tcnt); 327 } 328 329 #ifdef DEBUG 330 void 331 ahsc_dump() 332 { 333 extern struct cfdriver ahsc_cd; 334 int i; 335 336 for (i = 0; i < ahsc_cd.cd_ndevs; ++i) 337 if (ahsc_cd.cd_devs[i]) 338 sbic_dump(ahsc_cd.cd_devs[i]); 339 } 340 #endif 341
Indexes created Mon Oct 13 16:09:52 GMT 2025