ahsc.c revision 1.28
1 /* $NetBSD: ahsc.c,v 1.28 2002/01/26 13:40:52 aymeric 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(struct device *, struct device *, void *); 59 int ahscmatch(struct device *, struct cfdata *, void *); 60 61 void ahsc_enintr(struct sbic_softc *); 62 void ahsc_dmastop(struct sbic_softc *); 63 int ahsc_dmanext(struct sbic_softc *); 64 int ahsc_dmaintr(void *); 65 int ahsc_dmago(struct sbic_softc *, char *, int, int); 66 67 #ifdef DEBUG 68 void ahsc_dump(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(struct device *pdp, struct cfdata *cfp, void *auxp) 84 { 85 char *mbusstr; 86 87 mbusstr = auxp; 88 if (is_a3000() && matchname(auxp, "ahsc")) 89 return(1); 90 return(0); 91 } 92 93 void 94 ahscattach(struct device *pdp, struct device *dp, void *auxp) 95 { 96 volatile struct sdmac *rp; 97 struct sbic_softc *sc = (struct sbic_softc *)dp; 98 struct cfdev *cdp, *ecdp; 99 struct scsipi_adapter *adapt = &sc->sc_adapter; 100 struct scsipi_channel *chan = &sc->sc_channel; 101 102 ecdp = &cfdev[ncfdev]; 103 104 for (cdp = cfdev; cdp < ecdp; cdp++) { 105 if (cdp->rom.manid == 8738 && 106 cdp->rom.prodid == 35) 107 break; 108 } 109 110 sc->sc_cregs = rp = ztwomap(0xdd0000); 111 /* 112 * disable ints and reset bank register 113 */ 114 rp->CNTR = CNTR_PDMD; 115 rp->DAWR = DAWR_AHSC; 116 sc->sc_enintr = ahsc_enintr; 117 sc->sc_dmago = ahsc_dmago; 118 sc->sc_dmanext = ahsc_dmanext; 119 sc->sc_dmastop = ahsc_dmastop; 120 sc->sc_dmacmd = 0; 121 122 /* 123 * eveything is a valid dma address 124 */ 125 sc->sc_dmamask = 0; 126 127 if (cdp < ecdp) { 128 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x43); 129 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x47); 130 printf(": modified for Apollo cpu board\n"); 131 } else { 132 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x41); 133 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x43); 134 printf("\n"); 135 } 136 137 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 138 139 /* 140 * Fill in the scsipi_adapter. 141 */ 142 memset(adapt, 0, sizeof(*adapt)); 143 adapt->adapt_dev = &sc->sc_dev; 144 adapt->adapt_nchannels = 1; 145 adapt->adapt_openings = 7; 146 adapt->adapt_max_periph = 1; 147 adapt->adapt_request = sbic_scsipi_request; 148 adapt->adapt_minphys = sbic_minphys; 149 150 /* 151 * Fill in the scsipi_channel. 152 */ 153 memset(chan, 0, sizeof(*chan)); 154 chan->chan_adapter = adapt; 155 chan->chan_bustype = &scsi_bustype; 156 chan->chan_channel = 0; 157 chan->chan_ntargets = 8; 158 chan->chan_nluns = 8; 159 chan->chan_id = 7; 160 161 sbicinit(sc); 162 163 sc->sc_isr.isr_intr = ahsc_dmaintr; 164 sc->sc_isr.isr_arg = sc; 165 sc->sc_isr.isr_ipl = 2; 166 add_isr (&sc->sc_isr); 167 168 /* 169 * attach all scsi units on us 170 */ 171 config_found(dp, chan, scsiprint); 172 } 173 174 void 175 ahsc_enintr(struct sbic_softc *dev) 176 { 177 volatile struct sdmac *sdp; 178 179 sdp = dev->sc_cregs; 180 181 dev->sc_flags |= SBICF_INTR; 182 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 183 } 184 185 int 186 ahsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 187 { 188 volatile struct sdmac *sdp; 189 190 sdp = dev->sc_cregs; 191 /* 192 * Set up the command word based on flags 193 */ 194 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 195 if ((flags & DMAGO_READ) == 0) 196 dev->sc_dmacmd |= CNTR_DDIR; 197 #ifdef DEBUG 198 if (ahsc_dmadebug & DDB_IO) 199 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 200 #endif 201 202 dev->sc_flags |= SBICF_INTR; 203 sdp->CNTR = dev->sc_dmacmd; 204 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 205 sdp->ST_DMA = 1; 206 207 return(dev->sc_tcnt); 208 } 209 210 void 211 ahsc_dmastop(struct sbic_softc *dev) 212 { 213 volatile struct sdmac *sdp; 214 int s; 215 216 sdp = dev->sc_cregs; 217 218 #ifdef DEBUG 219 if (ahsc_dmadebug & DDB_FOLLOW) 220 printf("ahsc_dmastop()\n"); 221 #endif 222 if (dev->sc_dmacmd) { 223 s = splbio(); 224 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 225 /* 226 * only FLUSH if terminal count not enabled, 227 * and reading from peripheral 228 */ 229 sdp->FLUSH = 1; 230 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 231 ; 232 } 233 /* 234 * clear possible interrupt and stop dma 235 */ 236 sdp->CINT = 1; 237 sdp->SP_DMA = 1; 238 dev->sc_dmacmd = 0; 239 splx(s); 240 } 241 } 242 243 int 244 ahsc_dmaintr(void *arg) 245 { 246 struct sbic_softc *dev = arg; 247 volatile struct sdmac *sdp; 248 int stat, found; 249 250 sdp = dev->sc_cregs; 251 stat = sdp->ISTR; 252 253 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 254 return (0); 255 256 #ifdef DEBUG 257 if (ahsc_dmadebug & DDB_FOLLOW) 258 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 259 #endif 260 261 /* 262 * both, SCSI and DMA interrupts arrive here. I chose 263 * arbitrarily that DMA interrupts should have higher 264 * precedence than SCSI interrupts. 265 */ 266 found = 0; 267 if (stat & ISTR_E_INT) { 268 ++found; 269 270 sdp->CINT = 1; /* clear possible interrupt */ 271 272 /* 273 * check for SCSI ints in the same go and 274 * eventually save an interrupt 275 */ 276 } 277 278 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 279 found += sbicintr(dev); 280 return(found); 281 } 282 283 284 int 285 ahsc_dmanext(struct sbic_softc *dev) 286 { 287 volatile struct sdmac *sdp; 288 289 sdp = dev->sc_cregs; 290 291 if (dev->sc_cur > dev->sc_last) { 292 /* shouldn't happen !! */ 293 printf("ahsc_dmanext at end !!!\n"); 294 ahsc_dmastop(dev); 295 return(0); 296 } 297 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 298 /* 299 * only FLUSH if terminal count not enabled, 300 * and reading from peripheral 301 */ 302 sdp->FLUSH = 1; 303 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 304 ; 305 } 306 /* 307 * clear possible interrupt and stop dma 308 */ 309 sdp->CINT = 1; /* clear possible interrupt */ 310 sdp->SP_DMA = 1; /* stop dma */ 311 sdp->CNTR = dev->sc_dmacmd; 312 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 313 sdp->ST_DMA = 1; 314 315 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 316 return(dev->sc_tcnt); 317 } 318 319 #ifdef DEBUG 320 void 321 ahsc_dump(void) 322 { 323 extern struct cfdriver ahsc_cd; 324 int i; 325 326 for (i = 0; i < ahsc_cd.cd_ndevs; ++i) 327 if (ahsc_cd.cd_devs[i]) 328 sbic_dump(ahsc_cd.cd_devs[i]); 329 } 330 #endif 331
Indexes created Tue Sep 30 20:09:53 GMT 2025