ahsc.c revision 1.27
1 /* $NetBSD: ahsc.c,v 1.27 2001/04/25 17:53:06 bouyer 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 #include <machine/cpu.h> 57 58 void ahscattach __P((struct device *, struct device *, void *)); 59 int ahscmatch __P((struct device *, struct cfdata *, void *)); 60 61 void ahsc_enintr __P((struct sbic_softc *)); 62 void ahsc_dmastop __P((struct sbic_softc *)); 63 int ahsc_dmanext __P((struct sbic_softc *)); 64 int ahsc_dmaintr __P((void *)); 65 int ahsc_dmago __P((struct sbic_softc *, char *, int, int)); 66 67 #ifdef DEBUG 68 void ahsc_dump __P((void)); 69 #endif 70 71 #ifdef DEBUG 72 int ahsc_dmadebug = 0; 73 #endif 74 75 struct cfattach ahsc_ca = { 76 sizeof(struct sbic_softc), ahscmatch, ahscattach 77 }; 78 79 /* 80 * if we are an A3000 we are here. 81 */ 82 int 83 ahscmatch(pdp, cfp, auxp) 84 struct device *pdp; 85 struct cfdata *cfp; 86 void *auxp; 87 { 88 char *mbusstr; 89 90 mbusstr = auxp; 91 if (is_a3000() && matchname(auxp, "ahsc")) 92 return(1); 93 return(0); 94 } 95 96 void 97 ahscattach(pdp, dp, auxp) 98 struct device *pdp, *dp; 99 void *auxp; 100 { 101 volatile struct sdmac *rp; 102 struct sbic_softc *sc = (struct sbic_softc *)dp; 103 struct cfdev *cdp, *ecdp; 104 struct scsipi_adapter *adapt = &sc->sc_adapter; 105 struct scsipi_channel *chan = &sc->sc_channel; 106 107 ecdp = &cfdev[ncfdev]; 108 109 for (cdp = cfdev; cdp < ecdp; cdp++) { 110 if (cdp->rom.manid == 8738 && 111 cdp->rom.prodid == 35) 112 break; 113 } 114 115 sc->sc_cregs = rp = ztwomap(0xdd0000); 116 /* 117 * disable ints and reset bank register 118 */ 119 rp->CNTR = CNTR_PDMD; 120 rp->DAWR = DAWR_AHSC; 121 sc->sc_enintr = ahsc_enintr; 122 sc->sc_dmago = ahsc_dmago; 123 sc->sc_dmanext = ahsc_dmanext; 124 sc->sc_dmastop = ahsc_dmastop; 125 sc->sc_dmacmd = 0; 126 127 /* 128 * eveything is a valid dma address 129 */ 130 sc->sc_dmamask = 0; 131 132 if (cdp < ecdp) { 133 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x43); 134 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x47); 135 printf(": modified for Apollo cpu board\n"); 136 } else { 137 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x41); 138 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x43); 139 printf("\n"); 140 } 141 142 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 143 144 /* 145 * Fill in the scsipi_adapter. 146 */ 147 memset(adapt, 0, sizeof(*adapt)); 148 adapt->adapt_dev = &sc->sc_dev; 149 adapt->adapt_nchannels = 1; 150 adapt->adapt_openings = 7; 151 adapt->adapt_max_periph = 1; 152 adapt->adapt_request = sbic_scsipi_request; 153 adapt->adapt_minphys = sbic_minphys; 154 155 /* 156 * Fill in the scsipi_channel. 157 */ 158 memset(chan, 0, sizeof(*chan)); 159 chan->chan_adapter = adapt; 160 chan->chan_bustype = &scsi_bustype; 161 chan->chan_channel = 0; 162 chan->chan_ntargets = 8; 163 chan->chan_nluns = 8; 164 chan->chan_id = 7; 165 166 sbicinit(sc); 167 168 sc->sc_isr.isr_intr = ahsc_dmaintr; 169 sc->sc_isr.isr_arg = sc; 170 sc->sc_isr.isr_ipl = 2; 171 add_isr (&sc->sc_isr); 172 173 /* 174 * attach all scsi units on us 175 */ 176 config_found(dp, chan, scsiprint); 177 } 178 179 void 180 ahsc_enintr(dev) 181 struct sbic_softc *dev; 182 { 183 volatile struct sdmac *sdp; 184 185 sdp = dev->sc_cregs; 186 187 dev->sc_flags |= SBICF_INTR; 188 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 189 } 190 191 int 192 ahsc_dmago(dev, addr, count, flags) 193 struct sbic_softc *dev; 194 char *addr; 195 int count, flags; 196 { 197 volatile struct sdmac *sdp; 198 199 sdp = dev->sc_cregs; 200 /* 201 * Set up the command word based on flags 202 */ 203 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 204 if ((flags & DMAGO_READ) == 0) 205 dev->sc_dmacmd |= CNTR_DDIR; 206 #ifdef DEBUG 207 if (ahsc_dmadebug & DDB_IO) 208 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 209 #endif 210 211 dev->sc_flags |= SBICF_INTR; 212 sdp->CNTR = dev->sc_dmacmd; 213 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 214 sdp->ST_DMA = 1; 215 216 return(dev->sc_tcnt); 217 } 218 219 void 220 ahsc_dmastop(dev) 221 struct sbic_softc *dev; 222 { 223 volatile struct sdmac *sdp; 224 int s; 225 226 sdp = dev->sc_cregs; 227 228 #ifdef DEBUG 229 if (ahsc_dmadebug & DDB_FOLLOW) 230 printf("ahsc_dmastop()\n"); 231 #endif 232 if (dev->sc_dmacmd) { 233 s = splbio(); 234 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 235 /* 236 * only FLUSH if terminal count not enabled, 237 * and reading from peripheral 238 */ 239 sdp->FLUSH = 1; 240 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 241 ; 242 } 243 /* 244 * clear possible interrupt and stop dma 245 */ 246 sdp->CINT = 1; 247 sdp->SP_DMA = 1; 248 dev->sc_dmacmd = 0; 249 splx(s); 250 } 251 } 252 253 int 254 ahsc_dmaintr(arg) 255 void *arg; 256 { 257 struct sbic_softc *dev = arg; 258 volatile struct sdmac *sdp; 259 int stat, found; 260 261 sdp = dev->sc_cregs; 262 stat = sdp->ISTR; 263 264 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 265 return (0); 266 267 #ifdef DEBUG 268 if (ahsc_dmadebug & DDB_FOLLOW) 269 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 270 #endif 271 272 /* 273 * both, SCSI and DMA interrupts arrive here. I chose 274 * arbitrarily that DMA interrupts should have higher 275 * precedence than SCSI interrupts. 276 */ 277 found = 0; 278 if (stat & ISTR_E_INT) { 279 ++found; 280 281 sdp->CINT = 1; /* clear possible interrupt */ 282 283 /* 284 * check for SCSI ints in the same go and 285 * eventually save an interrupt 286 */ 287 } 288 289 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 290 found += sbicintr(dev); 291 return(found); 292 } 293 294 295 int 296 ahsc_dmanext(dev) 297 struct sbic_softc *dev; 298 { 299 volatile struct sdmac *sdp; 300 301 sdp = dev->sc_cregs; 302 303 if (dev->sc_cur > dev->sc_last) { 304 /* shouldn't happen !! */ 305 printf("ahsc_dmanext at end !!!\n"); 306 ahsc_dmastop(dev); 307 return(0); 308 } 309 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 310 /* 311 * only FLUSH if terminal count not enabled, 312 * and reading from peripheral 313 */ 314 sdp->FLUSH = 1; 315 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 316 ; 317 } 318 /* 319 * clear possible interrupt and stop dma 320 */ 321 sdp->CINT = 1; /* clear possible interrupt */ 322 sdp->SP_DMA = 1; /* stop dma */ 323 sdp->CNTR = dev->sc_dmacmd; 324 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 325 sdp->ST_DMA = 1; 326 327 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 328 return(dev->sc_tcnt); 329 } 330 331 #ifdef DEBUG 332 void 333 ahsc_dump() 334 { 335 extern struct cfdriver ahsc_cd; 336 int i; 337 338 for (i = 0; i < ahsc_cd.cd_ndevs; ++i) 339 if (ahsc_cd.cd_devs[i]) 340 sbic_dump(ahsc_cd.cd_devs[i]); 341 } 342 #endif 343
Indexes created Tue Sep 30 17:09:57 GMT 2025