ahsc.c revision 1.12
1 /* $NetBSD: ahsc.c,v 1.12 1996/04/21 21:10:49 veego 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 <scsi/scsi_all.h> 43 #include <scsi/scsiconf.h> 44 #include <amiga/amiga/custom.h> 45 #include <amiga/amiga/cc.h> 46 #include <amiga/amiga/device.h> 47 #include <amiga/amiga/isr.h> 48 #include <amiga/dev/dmavar.h> 49 #include <amiga/dev/sbicreg.h> 50 #include <amiga/dev/sbicvar.h> 51 #include <amiga/dev/ahscreg.h> 52 #include <amiga/dev/zbusvar.h> 53 54 int ahscprint __P((void *auxp, char *)); 55 void ahscattach __P((struct device *, struct device *, void *)); 56 int ahscmatch __P((struct device *, void *, void *)); 57 58 void ahsc_enintr __P((struct sbic_softc *)); 59 void ahsc_dmastop __P((struct sbic_softc *)); 60 int ahsc_dmanext __P((struct sbic_softc *)); 61 int ahsc_dmaintr __P((void *)); 62 int ahsc_dmago __P((struct sbic_softc *, char *, int, int)); 63 64 #ifdef DEBUG 65 void ahsc_dump __P((void)); 66 #endif 67 68 struct scsi_adapter ahsc_scsiswitch = { 69 sbic_scsicmd, 70 sbic_minphys, 71 0, /* no lun support */ 72 0, /* no lun support */ 73 }; 74 75 struct scsi_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 struct cfdriver ahsc_cd = { 92 NULL, "ahsc", DV_DULL, NULL, 0 93 }; 94 95 /* 96 * if we are an A3000 we are here. 97 */ 98 int 99 ahscmatch(pdp, match, auxp) 100 struct device *pdp; 101 void *match, *auxp; 102 { 103 char *mbusstr; 104 105 mbusstr = auxp; 106 if (is_a3000() && matchname(auxp, "ahsc")) 107 return(1); 108 return(0); 109 } 110 111 void 112 ahscattach(pdp, dp, auxp) 113 struct device *pdp, *dp; 114 void *auxp; 115 { 116 volatile struct sdmac *rp; 117 struct sbic_softc *sc; 118 119 printf("\n"); 120 121 sc = (struct sbic_softc *)dp; 122 sc->sc_cregs = rp = ztwomap(0xdd0000); 123 /* 124 * disable ints and reset bank register 125 */ 126 rp->CNTR = CNTR_PDMD; 127 rp->DAWR = DAWR_AHSC; 128 sc->sc_enintr = ahsc_enintr; 129 sc->sc_dmago = ahsc_dmago; 130 sc->sc_dmanext = ahsc_dmanext; 131 sc->sc_dmastop = ahsc_dmastop; 132 sc->sc_dmacmd = 0; 133 134 /* 135 * eveything is a valid dma address 136 */ 137 sc->sc_dmamask = 0; 138 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x41); 139 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 140 141 sc->sc_link.adapter_softc = sc; 142 sc->sc_link.adapter_target = 7; 143 sc->sc_link.adapter = &ahsc_scsiswitch; 144 sc->sc_link.device = &ahsc_scsidev; 145 sc->sc_link.openings = 2; 146 147 sbicinit(sc); 148 149 sc->sc_isr.isr_intr = ahsc_dmaintr; 150 sc->sc_isr.isr_arg = sc; 151 sc->sc_isr.isr_ipl = 2; 152 add_isr (&sc->sc_isr); 153 154 /* 155 * attach all scsi units on us 156 */ 157 config_found(dp, &sc->sc_link, ahscprint); 158 } 159 160 /* 161 * print diag if pnp is NULL else just extra 162 */ 163 int 164 ahscprint(auxp, pnp) 165 void *auxp; 166 char *pnp; 167 { 168 if (pnp == NULL) 169 return(UNCONF); 170 return(QUIET); 171 } 172 173 174 void 175 ahsc_enintr(dev) 176 struct sbic_softc *dev; 177 { 178 volatile struct sdmac *sdp; 179 180 sdp = dev->sc_cregs; 181 182 dev->sc_flags |= SBICF_INTR; 183 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 184 } 185 186 int 187 ahsc_dmago(dev, addr, count, flags) 188 struct sbic_softc *dev; 189 char *addr; 190 int count, flags; 191 { 192 volatile struct sdmac *sdp; 193 194 sdp = dev->sc_cregs; 195 /* 196 * Set up the command word based on flags 197 */ 198 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 199 if ((flags & DMAGO_READ) == 0) 200 dev->sc_dmacmd |= CNTR_DDIR; 201 #ifdef DEBUG 202 if (ahsc_dmadebug & DDB_IO) 203 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 204 #endif 205 206 dev->sc_flags |= SBICF_INTR; 207 sdp->CNTR = dev->sc_dmacmd; 208 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 209 sdp->ST_DMA = 1; 210 211 return(dev->sc_tcnt); 212 } 213 214 void 215 ahsc_dmastop(dev) 216 struct sbic_softc *dev; 217 { 218 volatile struct sdmac *sdp; 219 int s; 220 221 sdp = dev->sc_cregs; 222 223 #ifdef DEBUG 224 if (ahsc_dmadebug & DDB_FOLLOW) 225 printf("ahsc_dmastop()\n"); 226 #endif 227 if (dev->sc_dmacmd) { 228 s = splbio(); 229 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 230 /* 231 * only FLUSH if terminal count not enabled, 232 * and reading from peripheral 233 */ 234 sdp->FLUSH = 1; 235 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 236 ; 237 } 238 /* 239 * clear possible interrupt and stop dma 240 */ 241 sdp->CINT = 1; 242 sdp->SP_DMA = 1; 243 dev->sc_dmacmd = 0; 244 splx(s); 245 } 246 } 247 248 int 249 ahsc_dmaintr(arg) 250 void *arg; 251 { 252 struct sbic_softc *dev = arg; 253 volatile struct sdmac *sdp; 254 int stat, found; 255 256 sdp = dev->sc_cregs; 257 stat = sdp->ISTR; 258 259 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 260 return (0); 261 262 #ifdef DEBUG 263 if (ahsc_dmadebug & DDB_FOLLOW) 264 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 265 #endif 266 267 /* 268 * both, SCSI and DMA interrupts arrive here. I chose 269 * arbitrarily that DMA interrupts should have higher 270 * precedence than SCSI interrupts. 271 */ 272 found = 0; 273 if (stat & ISTR_E_INT) { 274 ++found; 275 276 sdp->CINT = 1; /* clear possible interrupt */ 277 278 /* 279 * check for SCSI ints in the same go and 280 * eventually save an interrupt 281 */ 282 } 283 284 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 285 found += sbicintr(dev); 286 return(found); 287 } 288 289 290 int 291 ahsc_dmanext(dev) 292 struct sbic_softc *dev; 293 { 294 volatile struct sdmac *sdp; 295 296 sdp = dev->sc_cregs; 297 298 if (dev->sc_cur > dev->sc_last) { 299 /* shouldn't happen !! */ 300 printf("ahsc_dmanext at end !!!\n"); 301 ahsc_dmastop(dev); 302 return(0); 303 } 304 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 305 /* 306 * only FLUSH if terminal count not enabled, 307 * and reading from peripheral 308 */ 309 sdp->FLUSH = 1; 310 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 311 ; 312 } 313 /* 314 * clear possible interrupt and stop dma 315 */ 316 sdp->CINT = 1; /* clear possible interrupt */ 317 sdp->SP_DMA = 1; /* stop dma */ 318 sdp->CNTR = dev->sc_dmacmd; 319 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 320 sdp->ST_DMA = 1; 321 322 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 323 return(dev->sc_tcnt); 324 } 325 326 #ifdef DEBUG 327 void 328 ahsc_dump() 329 { 330 int i; 331 332 for (i = 0; i < ahsc_cd.cd_ndevs; ++i) 333 if (ahsc_cd.cd_devs[i]) 334 sbic_dump(ahsc_cd.cd_devs[i]); 335 } 336 #endif 337
Indexes created Tue Sep 30 17:09:57 GMT 2025