ahsc.c revision 1.11
1 /* $NetBSD: ahsc.c,v 1.11 1996/03/17 01:17:00 thorpej 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((struct sbic_softc *)); 62 int ahsc_dmago __P((struct sbic_softc *, char *, int, int)); 63 64 struct scsi_adapter ahsc_scsiswitch = { 65 sbic_scsicmd, 66 sbic_minphys, 67 0, /* no lun support */ 68 0, /* no lun support */ 69 }; 70 71 struct scsi_device ahsc_scsidev = { 72 NULL, /* use default error handler */ 73 NULL, /* do not have a start functio */ 74 NULL, /* have no async handler */ 75 NULL, /* Use default done routine */ 76 }; 77 78 79 #ifdef DEBUG 80 int ahsc_dmadebug = 0; 81 #endif 82 83 struct cfattach ahsc_ca = { 84 sizeof(struct sbic_softc), ahscmatch, ahscattach 85 }; 86 87 struct cfdriver ahsc_cd = { 88 NULL, "ahsc", DV_DULL, NULL, 0 89 }; 90 91 /* 92 * if we are an A3000 we are here. 93 */ 94 int 95 ahscmatch(pdp, match, auxp) 96 struct device *pdp; 97 void *match, *auxp; 98 { 99 struct cfdata *cdp = match; 100 char *mbusstr; 101 102 mbusstr = auxp; 103 if (is_a3000() && matchname(auxp, "ahsc")) 104 return(1); 105 return(0); 106 } 107 108 void 109 ahscattach(pdp, dp, auxp) 110 struct device *pdp, *dp; 111 void *auxp; 112 { 113 volatile struct sdmac *rp; 114 struct sbic_softc *sc; 115 116 printf("\n"); 117 118 sc = (struct sbic_softc *)dp; 119 sc->sc_cregs = rp = ztwomap(0xdd0000); 120 /* 121 * disable ints and reset bank register 122 */ 123 rp->CNTR = CNTR_PDMD; 124 rp->DAWR = DAWR_AHSC; 125 sc->sc_enintr = ahsc_enintr; 126 sc->sc_dmago = ahsc_dmago; 127 sc->sc_dmanext = ahsc_dmanext; 128 sc->sc_dmastop = ahsc_dmastop; 129 sc->sc_dmacmd = 0; 130 131 /* 132 * eveything is a valid dma address 133 */ 134 sc->sc_dmamask = 0; 135 sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x41); 136 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 137 138 sc->sc_link.adapter_softc = sc; 139 sc->sc_link.adapter_target = 7; 140 sc->sc_link.adapter = &ahsc_scsiswitch; 141 sc->sc_link.device = &ahsc_scsidev; 142 sc->sc_link.openings = 2; 143 144 sbicinit(sc); 145 146 sc->sc_isr.isr_intr = ahsc_dmaintr; 147 sc->sc_isr.isr_arg = sc; 148 sc->sc_isr.isr_ipl = 2; 149 add_isr (&sc->sc_isr); 150 151 /* 152 * attach all scsi units on us 153 */ 154 config_found(dp, &sc->sc_link, ahscprint); 155 } 156 157 /* 158 * print diag if pnp is NULL else just extra 159 */ 160 int 161 ahscprint(auxp, pnp) 162 void *auxp; 163 char *pnp; 164 { 165 if (pnp == NULL) 166 return(UNCONF); 167 return(QUIET); 168 } 169 170 171 void 172 ahsc_enintr(dev) 173 struct sbic_softc *dev; 174 { 175 volatile struct sdmac *sdp; 176 177 sdp = dev->sc_cregs; 178 179 dev->sc_flags |= SBICF_INTR; 180 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 181 } 182 183 int 184 ahsc_dmago(dev, addr, count, flags) 185 struct sbic_softc *dev; 186 char *addr; 187 int count, flags; 188 { 189 volatile struct sdmac *sdp; 190 191 sdp = dev->sc_cregs; 192 /* 193 * Set up the command word based on flags 194 */ 195 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 196 if ((flags & DMAGO_READ) == 0) 197 dev->sc_dmacmd |= CNTR_DDIR; 198 #ifdef DEBUG 199 if (ahsc_dmadebug & DDB_IO) 200 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 201 #endif 202 203 dev->sc_flags |= SBICF_INTR; 204 sdp->CNTR = dev->sc_dmacmd; 205 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 206 sdp->ST_DMA = 1; 207 208 return(dev->sc_tcnt); 209 } 210 211 void 212 ahsc_dmastop(dev) 213 struct sbic_softc *dev; 214 { 215 volatile struct sdmac *sdp; 216 int s; 217 218 sdp = dev->sc_cregs; 219 220 #ifdef DEBUG 221 if (ahsc_dmadebug & DDB_FOLLOW) 222 printf("ahsc_dmastop()\n"); 223 #endif 224 if (dev->sc_dmacmd) { 225 s = splbio(); 226 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 227 /* 228 * only FLUSH if terminal count not enabled, 229 * and reading from peripheral 230 */ 231 sdp->FLUSH = 1; 232 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 233 ; 234 } 235 /* 236 * clear possible interrupt and stop dma 237 */ 238 sdp->CINT = 1; 239 sdp->SP_DMA = 1; 240 dev->sc_dmacmd = 0; 241 splx(s); 242 } 243 } 244 245 int 246 ahsc_dmaintr(dev) 247 struct sbic_softc *dev; 248 { 249 volatile struct sdmac *sdp; 250 int stat, found; 251 252 sdp = dev->sc_cregs; 253 stat = sdp->ISTR; 254 255 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 256 return (0); 257 258 #ifdef DEBUG 259 if (ahsc_dmadebug & DDB_FOLLOW) 260 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 261 #endif 262 263 /* 264 * both, SCSI and DMA interrupts arrive here. I chose 265 * arbitrarily that DMA interrupts should have higher 266 * precedence than SCSI interrupts. 267 */ 268 found = 0; 269 if (stat & ISTR_E_INT) { 270 ++found; 271 272 sdp->CINT = 1; /* clear possible interrupt */ 273 274 /* 275 * check for SCSI ints in the same go and 276 * eventually save an interrupt 277 */ 278 } 279 280 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 281 found += sbicintr(dev); 282 return(found); 283 } 284 285 286 int 287 ahsc_dmanext(dev) 288 struct sbic_softc *dev; 289 { 290 volatile struct sdmac *sdp; 291 int i, stat; 292 293 sdp = dev->sc_cregs; 294 295 if (dev->sc_cur > dev->sc_last) { 296 /* shouldn't happen !! */ 297 printf("ahsc_dmanext at end !!!\n"); 298 ahsc_dmastop(dev); 299 return(0); 300 } 301 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 302 /* 303 * only FLUSH if terminal count not enabled, 304 * and reading from peripheral 305 */ 306 sdp->FLUSH = 1; 307 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 308 ; 309 } 310 /* 311 * clear possible interrupt and stop dma 312 */ 313 sdp->CINT = 1; /* clear possible interrupt */ 314 sdp->SP_DMA = 1; /* stop dma */ 315 sdp->CNTR = dev->sc_dmacmd; 316 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 317 sdp->ST_DMA = 1; 318 319 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 320 return(dev->sc_tcnt); 321 } 322 323 #ifdef DEBUG 324 void 325 ahsc_dump() 326 { 327 int i; 328 329 for (i = 0; i < ahsc_cd.cd_ndevs; ++i) 330 if (ahsc_cd.cd_devs[i]) 331 sbic_dump(ahsc_cd.cd_devs[i]); 332 } 333 #endif 334
Indexes created Tue Sep 30 17:09:57 GMT 2025