ahsc.c revision 1.25
1 /* $NetBSD: ahsc.c,v 1.25 1998/12/05 19:43:34 mjacob 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_device ahsc_scsidev = { 70 NULL, /* use default error handler */ 71 NULL, /* do not have a start functio */ 72 NULL, /* have no async handler */ 73 NULL, /* Use default done routine */ 74 }; 75 76 77 #ifdef DEBUG 78 int ahsc_dmadebug = 0; 79 #endif 80 81 struct cfattach ahsc_ca = { 82 sizeof(struct sbic_softc), ahscmatch, ahscattach 83 }; 84 85 /* 86 * if we are an A3000 we are here. 87 */ 88 int 89 ahscmatch(pdp, cfp, auxp) 90 struct device *pdp; 91 struct cfdata *cfp; 92 void *auxp; 93 { 94 char *mbusstr; 95 96 mbusstr = auxp; 97 if (is_a3000() && matchname(auxp, "ahsc")) 98 return(1); 99 return(0); 100 } 101 102 void 103 ahscattach(pdp, dp, auxp) 104 struct device *pdp, *dp; 105 void *auxp; 106 { 107 volatile struct sdmac *rp; 108 struct sbic_softc *sc; 109 struct cfdev *cdp, *ecdp; 110 111 ecdp = &cfdev[ncfdev]; 112 113 for (cdp = cfdev; cdp < ecdp; cdp++) { 114 if (cdp->rom.manid == 8738 && 115 cdp->rom.prodid == 35) 116 break; 117 } 118 119 sc = (struct sbic_softc *)dp; 120 sc->sc_cregs = rp = ztwomap(0xdd0000); 121 /* 122 * disable ints and reset bank register 123 */ 124 rp->CNTR = CNTR_PDMD; 125 rp->DAWR = DAWR_AHSC; 126 sc->sc_enintr = ahsc_enintr; 127 sc->sc_dmago = ahsc_dmago; 128 sc->sc_dmanext = ahsc_dmanext; 129 sc->sc_dmastop = ahsc_dmastop; 130 sc->sc_dmacmd = 0; 131 132 /* 133 * eveything is a valid dma address 134 */ 135 sc->sc_dmamask = 0; 136 137 if (cdp < ecdp) { 138 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x43); 139 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x47); 140 printf(": modified for Apollo cpu board\n"); 141 } else { 142 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x41); 143 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x43); 144 printf("\n"); 145 } 146 147 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 148 149 sc->sc_adapter.scsipi_cmd = sbic_scsicmd; 150 sc->sc_adapter.scsipi_minphys = sbic_minphys; 151 152 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; 153 sc->sc_link.adapter_softc = sc; 154 sc->sc_link.scsipi_scsi.adapter_target = 7; 155 sc->sc_link.adapter = &sc->sc_adapter; 156 sc->sc_link.device = &ahsc_scsidev; 157 sc->sc_link.openings = 2; 158 sc->sc_link.scsipi_scsi.max_target = 7; 159 sc->sc_link.scsipi_scsi.max_lun = 7; 160 sc->sc_link.type = BUS_SCSI; 161 162 sbicinit(sc); 163 164 sc->sc_isr.isr_intr = ahsc_dmaintr; 165 sc->sc_isr.isr_arg = sc; 166 sc->sc_isr.isr_ipl = 2; 167 add_isr (&sc->sc_isr); 168 169 /* 170 * attach all scsi units on us 171 */ 172 config_found(dp, &sc->sc_link, scsiprint); 173 } 174 175 void 176 ahsc_enintr(dev) 177 struct sbic_softc *dev; 178 { 179 volatile struct sdmac *sdp; 180 181 sdp = dev->sc_cregs; 182 183 dev->sc_flags |= SBICF_INTR; 184 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 185 } 186 187 int 188 ahsc_dmago(dev, addr, count, flags) 189 struct sbic_softc *dev; 190 char *addr; 191 int count, flags; 192 { 193 volatile struct sdmac *sdp; 194 195 sdp = dev->sc_cregs; 196 /* 197 * Set up the command word based on flags 198 */ 199 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 200 if ((flags & DMAGO_READ) == 0) 201 dev->sc_dmacmd |= CNTR_DDIR; 202 #ifdef DEBUG 203 if (ahsc_dmadebug & DDB_IO) 204 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 205 #endif 206 207 dev->sc_flags |= SBICF_INTR; 208 sdp->CNTR = dev->sc_dmacmd; 209 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 210 sdp->ST_DMA = 1; 211 212 return(dev->sc_tcnt); 213 } 214 215 void 216 ahsc_dmastop(dev) 217 struct sbic_softc *dev; 218 { 219 volatile struct sdmac *sdp; 220 int s; 221 222 sdp = dev->sc_cregs; 223 224 #ifdef DEBUG 225 if (ahsc_dmadebug & DDB_FOLLOW) 226 printf("ahsc_dmastop()\n"); 227 #endif 228 if (dev->sc_dmacmd) { 229 s = splbio(); 230 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 231 /* 232 * only FLUSH if terminal count not enabled, 233 * and reading from peripheral 234 */ 235 sdp->FLUSH = 1; 236 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 237 ; 238 } 239 /* 240 * clear possible interrupt and stop dma 241 */ 242 sdp->CINT = 1; 243 sdp->SP_DMA = 1; 244 dev->sc_dmacmd = 0; 245 splx(s); 246 } 247 } 248 249 int 250 ahsc_dmaintr(arg) 251 void *arg; 252 { 253 struct sbic_softc *dev = arg; 254 volatile struct sdmac *sdp; 255 int stat, found; 256 257 sdp = dev->sc_cregs; 258 stat = sdp->ISTR; 259 260 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 261 return (0); 262 263 #ifdef DEBUG 264 if (ahsc_dmadebug & DDB_FOLLOW) 265 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 266 #endif 267 268 /* 269 * both, SCSI and DMA interrupts arrive here. I chose 270 * arbitrarily that DMA interrupts should have higher 271 * precedence than SCSI interrupts. 272 */ 273 found = 0; 274 if (stat & ISTR_E_INT) { 275 ++found; 276 277 sdp->CINT = 1; /* clear possible interrupt */ 278 279 /* 280 * check for SCSI ints in the same go and 281 * eventually save an interrupt 282 */ 283 } 284 285 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 286 found += sbicintr(dev); 287 return(found); 288 } 289 290 291 int 292 ahsc_dmanext(dev) 293 struct sbic_softc *dev; 294 { 295 volatile struct sdmac *sdp; 296 297 sdp = dev->sc_cregs; 298 299 if (dev->sc_cur > dev->sc_last) { 300 /* shouldn't happen !! */ 301 printf("ahsc_dmanext at end !!!\n"); 302 ahsc_dmastop(dev); 303 return(0); 304 } 305 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 306 /* 307 * only FLUSH if terminal count not enabled, 308 * and reading from peripheral 309 */ 310 sdp->FLUSH = 1; 311 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 312 ; 313 } 314 /* 315 * clear possible interrupt and stop dma 316 */ 317 sdp->CINT = 1; /* clear possible interrupt */ 318 sdp->SP_DMA = 1; /* stop dma */ 319 sdp->CNTR = dev->sc_dmacmd; 320 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 321 sdp->ST_DMA = 1; 322 323 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 324 return(dev->sc_tcnt); 325 } 326 327 #ifdef DEBUG 328 void 329 ahsc_dump() 330 { 331 extern struct cfdriver ahsc_cd; 332 int i; 333 334 for (i = 0; i < ahsc_cd.cd_ndevs; ++i) 335 if (ahsc_cd.cd_devs[i]) 336 sbic_dump(ahsc_cd.cd_devs[i]); 337 } 338 #endif 339
Indexes created Tue Sep 30 20:09:53 GMT 2025