ahsc.c revision 1.22
1 /* $NetBSD: ahsc.c,v 1.22 1998/09/04 22:00:27 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/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 0, /* no lun support */ 73 0, /* no lun support */ 74 }; 75 76 struct scsipi_device ahsc_scsidev = { 77 NULL, /* use default error handler */ 78 NULL, /* do not have a start functio */ 79 NULL, /* have no async handler */ 80 NULL, /* Use default done routine */ 81 }; 82 83 84 #ifdef DEBUG 85 int ahsc_dmadebug = 0; 86 #endif 87 88 struct cfattach ahsc_ca = { 89 sizeof(struct sbic_softc), ahscmatch, ahscattach 90 }; 91 92 /* 93 * if we are an A3000 we are here. 94 */ 95 int 96 ahscmatch(pdp, cfp, auxp) 97 struct device *pdp; 98 struct cfdata *cfp; 99 void *auxp; 100 { 101 char *mbusstr; 102 103 mbusstr = auxp; 104 if (is_a3000() && matchname(auxp, "ahsc")) 105 return(1); 106 return(0); 107 } 108 109 void 110 ahscattach(pdp, dp, auxp) 111 struct device *pdp, *dp; 112 void *auxp; 113 { 114 volatile struct sdmac *rp; 115 struct sbic_softc *sc; 116 struct cfdev *cdp, *ecdp; 117 118 ecdp = &cfdev[ncfdev]; 119 120 for (cdp = cfdev; cdp < ecdp; cdp++) { 121 if (cdp->rom.manid == 8738 && 122 cdp->rom.prodid == 35) 123 break; 124 } 125 126 sc = (struct sbic_softc *)dp; 127 sc->sc_cregs = rp = ztwomap(0xdd0000); 128 /* 129 * disable ints and reset bank register 130 */ 131 rp->CNTR = CNTR_PDMD; 132 rp->DAWR = DAWR_AHSC; 133 sc->sc_enintr = ahsc_enintr; 134 sc->sc_dmago = ahsc_dmago; 135 sc->sc_dmanext = ahsc_dmanext; 136 sc->sc_dmastop = ahsc_dmastop; 137 sc->sc_dmacmd = 0; 138 139 /* 140 * eveything is a valid dma address 141 */ 142 sc->sc_dmamask = 0; 143 144 if (cdp < ecdp) { 145 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x43); 146 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x47); 147 printf(": modified for Apollo cpu board\n"); 148 } else { 149 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x41); 150 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x43); 151 printf("\n"); 152 } 153 154 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 155 156 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 157 sc->sc_link.adapter_softc = sc; 158 sc->sc_link.scsipi_scsi.adapter_target = 7; 159 sc->sc_link.adapter = &ahsc_scsiswitch; 160 sc->sc_link.device = &ahsc_scsidev; 161 sc->sc_link.openings = 2; 162 sc->sc_link.scsipi_scsi.max_target = 7; 163 sc->sc_link.type = BUS_SCSI; 164 165 sbicinit(sc); 166 167 sc->sc_isr.isr_intr = ahsc_dmaintr; 168 sc->sc_isr.isr_arg = sc; 169 sc->sc_isr.isr_ipl = 2; 170 add_isr (&sc->sc_isr); 171 172 /* 173 * attach all scsi units on us 174 */ 175 config_found(dp, &sc->sc_link, scsiprint); 176 } 177 178 void 179 ahsc_enintr(dev) 180 struct sbic_softc *dev; 181 { 182 volatile struct sdmac *sdp; 183 184 sdp = dev->sc_cregs; 185 186 dev->sc_flags |= SBICF_INTR; 187 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 188 } 189 190 int 191 ahsc_dmago(dev, addr, count, flags) 192 struct sbic_softc *dev; 193 char *addr; 194 int count, flags; 195 { 196 volatile struct sdmac *sdp; 197 198 sdp = dev->sc_cregs; 199 /* 200 * Set up the command word based on flags 201 */ 202 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 203 if ((flags & DMAGO_READ) == 0) 204 dev->sc_dmacmd |= CNTR_DDIR; 205 #ifdef DEBUG 206 if (ahsc_dmadebug & DDB_IO) 207 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 208 #endif 209 210 dev->sc_flags |= SBICF_INTR; 211 sdp->CNTR = dev->sc_dmacmd; 212 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 213 sdp->ST_DMA = 1; 214 215 return(dev->sc_tcnt); 216 } 217 218 void 219 ahsc_dmastop(dev) 220 struct sbic_softc *dev; 221 { 222 volatile struct sdmac *sdp; 223 int s; 224 225 sdp = dev->sc_cregs; 226 227 #ifdef DEBUG 228 if (ahsc_dmadebug & DDB_FOLLOW) 229 printf("ahsc_dmastop()\n"); 230 #endif 231 if (dev->sc_dmacmd) { 232 s = splbio(); 233 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 234 /* 235 * only FLUSH if terminal count not enabled, 236 * and reading from peripheral 237 */ 238 sdp->FLUSH = 1; 239 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 240 ; 241 } 242 /* 243 * clear possible interrupt and stop dma 244 */ 245 sdp->CINT = 1; 246 sdp->SP_DMA = 1; 247 dev->sc_dmacmd = 0; 248 splx(s); 249 } 250 } 251 252 int 253 ahsc_dmaintr(arg) 254 void *arg; 255 { 256 struct sbic_softc *dev = arg; 257 volatile struct sdmac *sdp; 258 int stat, found; 259 260 sdp = dev->sc_cregs; 261 stat = sdp->ISTR; 262 263 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 264 return (0); 265 266 #ifdef DEBUG 267 if (ahsc_dmadebug & DDB_FOLLOW) 268 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 269 #endif 270 271 /* 272 * both, SCSI and DMA interrupts arrive here. I chose 273 * arbitrarily that DMA interrupts should have higher 274 * precedence than SCSI interrupts. 275 */ 276 found = 0; 277 if (stat & ISTR_E_INT) { 278 ++found; 279 280 sdp->CINT = 1; /* clear possible interrupt */ 281 282 /* 283 * check for SCSI ints in the same go and 284 * eventually save an interrupt 285 */ 286 } 287 288 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 289 found += sbicintr(dev); 290 return(found); 291 } 292 293 294 int 295 ahsc_dmanext(dev) 296 struct sbic_softc *dev; 297 { 298 volatile struct sdmac *sdp; 299 300 sdp = dev->sc_cregs; 301 302 if (dev->sc_cur > dev->sc_last) { 303 /* shouldn't happen !! */ 304 printf("ahsc_dmanext at end !!!\n"); 305 ahsc_dmastop(dev); 306 return(0); 307 } 308 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 309 /* 310 * only FLUSH if terminal count not enabled, 311 * and reading from peripheral 312 */ 313 sdp->FLUSH = 1; 314 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 315 ; 316 } 317 /* 318 * clear possible interrupt and stop dma 319 */ 320 sdp->CINT = 1; /* clear possible interrupt */ 321 sdp->SP_DMA = 1; /* stop dma */ 322 sdp->CNTR = dev->sc_dmacmd; 323 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 324 sdp->ST_DMA = 1; 325 326 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 327 return(dev->sc_tcnt); 328 } 329 330 #ifdef DEBUG 331 void 332 ahsc_dump() 333 { 334 extern struct cfdriver ahsc_cd; 335 int i; 336 337 for (i = 0; i < ahsc_cd.cd_ndevs; ++i) 338 if (ahsc_cd.cd_devs[i]) 339 sbic_dump(ahsc_cd.cd_devs[i]); 340 } 341 #endif 342
Indexes created Tue Sep 30 17:09:57 GMT 2025