ahsc.c revision 1.32
1 /* $NetBSD: ahsc.c,v 1.32 2003/05/03 18:10:42 wiz 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 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: ahsc.c,v 1.32 2003/05/03 18:10:42 wiz Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 #include <dev/scsipi/scsi_all.h> 47 #include <dev/scsipi/scsipi_all.h> 48 #include <dev/scsipi/scsiconf.h> 49 #include <amiga/amiga/custom.h> 50 #include <amiga/amiga/cc.h> 51 #include <amiga/amiga/cfdev.h> 52 #include <amiga/amiga/device.h> 53 #include <amiga/amiga/isr.h> 54 #include <amiga/dev/dmavar.h> 55 #include <amiga/dev/sbicreg.h> 56 #include <amiga/dev/sbicvar.h> 57 #include <amiga/dev/ahscreg.h> 58 #include <amiga/dev/zbusvar.h> 59 60 #include <machine/cpu.h> 61 62 void ahscattach(struct device *, struct device *, void *); 63 int ahscmatch(struct device *, struct cfdata *, void *); 64 65 void ahsc_enintr(struct sbic_softc *); 66 void ahsc_dmastop(struct sbic_softc *); 67 int ahsc_dmanext(struct sbic_softc *); 68 int ahsc_dmaintr(void *); 69 int ahsc_dmago(struct sbic_softc *, char *, int, int); 70 71 #ifdef DEBUG 72 void ahsc_dump(void); 73 #endif 74 75 #ifdef DEBUG 76 int ahsc_dmadebug = 0; 77 #endif 78 79 CFATTACH_DECL(ahsc, sizeof(struct sbic_softc), 80 ahscmatch, ahscattach, NULL, NULL); 81 82 /* 83 * if we are an A3000 we are here. 84 */ 85 int 86 ahscmatch(struct device *pdp, struct cfdata *cfp, 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(struct device *pdp, struct device *dp, void *auxp) 98 { 99 volatile struct sdmac *rp; 100 struct sbic_softc *sc = (struct sbic_softc *)dp; 101 struct cfdev *cdp, *ecdp; 102 struct scsipi_adapter *adapt = &sc->sc_adapter; 103 struct scsipi_channel *chan = &sc->sc_channel; 104 105 ecdp = &cfdev[ncfdev]; 106 107 for (cdp = cfdev; cdp < ecdp; cdp++) { 108 if (cdp->rom.manid == 8738 && 109 cdp->rom.prodid == 35) 110 break; 111 } 112 113 sc->sc_cregs = rp = ztwomap(0xdd0000); 114 /* 115 * disable ints and reset bank register 116 */ 117 rp->CNTR = CNTR_PDMD; 118 rp->DAWR = DAWR_AHSC; 119 sc->sc_enintr = ahsc_enintr; 120 sc->sc_dmago = ahsc_dmago; 121 sc->sc_dmanext = ahsc_dmanext; 122 sc->sc_dmastop = ahsc_dmastop; 123 sc->sc_dmacmd = 0; 124 125 /* 126 * everything is a valid DMA address 127 */ 128 sc->sc_dmamask = 0; 129 130 if (cdp < ecdp) { 131 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x43); 132 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x47); 133 printf(": modified for Apollo cpu board\n"); 134 } else { 135 sc->sc_sbic.sbic_asr_p = ((vu_char *)rp + 0x41); 136 sc->sc_sbic.sbic_value_p = ((vu_char *)rp + 0x43); 137 printf("\n"); 138 } 139 140 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; 141 142 /* 143 * Fill in the scsipi_adapter. 144 */ 145 memset(adapt, 0, sizeof(*adapt)); 146 adapt->adapt_dev = &sc->sc_dev; 147 adapt->adapt_nchannels = 1; 148 adapt->adapt_openings = 7; 149 adapt->adapt_max_periph = 1; 150 adapt->adapt_request = sbic_scsipi_request; 151 adapt->adapt_minphys = sbic_minphys; 152 153 /* 154 * Fill in the scsipi_channel. 155 */ 156 memset(chan, 0, sizeof(*chan)); 157 chan->chan_adapter = adapt; 158 chan->chan_bustype = &scsi_bustype; 159 chan->chan_channel = 0; 160 chan->chan_ntargets = 8; 161 chan->chan_nluns = 8; 162 chan->chan_id = 7; 163 164 sbicinit(sc); 165 166 sc->sc_isr.isr_intr = ahsc_dmaintr; 167 sc->sc_isr.isr_arg = sc; 168 sc->sc_isr.isr_ipl = 2; 169 add_isr (&sc->sc_isr); 170 171 /* 172 * attach all scsi units on us 173 */ 174 config_found(dp, chan, scsiprint); 175 } 176 177 void 178 ahsc_enintr(struct sbic_softc *dev) 179 { 180 volatile struct sdmac *sdp; 181 182 sdp = dev->sc_cregs; 183 184 dev->sc_flags |= SBICF_INTR; 185 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 186 } 187 188 int 189 ahsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 190 { 191 volatile struct sdmac *sdp; 192 193 sdp = dev->sc_cregs; 194 /* 195 * Set up the command word based on flags 196 */ 197 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 198 if ((flags & DMAGO_READ) == 0) 199 dev->sc_dmacmd |= CNTR_DDIR; 200 #ifdef DEBUG 201 if (ahsc_dmadebug & DDB_IO) 202 printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); 203 #endif 204 205 dev->sc_flags |= SBICF_INTR; 206 sdp->CNTR = dev->sc_dmacmd; 207 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 208 sdp->ST_DMA = 1; 209 210 return(dev->sc_tcnt); 211 } 212 213 void 214 ahsc_dmastop(struct sbic_softc *dev) 215 { 216 volatile struct sdmac *sdp; 217 int s; 218 219 sdp = dev->sc_cregs; 220 221 #ifdef DEBUG 222 if (ahsc_dmadebug & DDB_FOLLOW) 223 printf("ahsc_dmastop()\n"); 224 #endif 225 if (dev->sc_dmacmd) { 226 s = splbio(); 227 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 228 /* 229 * only FLUSH if terminal count not enabled, 230 * and reading from peripheral 231 */ 232 sdp->FLUSH = 1; 233 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 234 ; 235 } 236 /* 237 * clear possible interrupt and stop DMA 238 */ 239 sdp->CINT = 1; 240 sdp->SP_DMA = 1; 241 dev->sc_dmacmd = 0; 242 splx(s); 243 } 244 } 245 246 int 247 ahsc_dmaintr(void *arg) 248 { 249 struct sbic_softc *dev = arg; 250 volatile struct sdmac *sdp; 251 int stat, found; 252 253 sdp = dev->sc_cregs; 254 stat = sdp->ISTR; 255 256 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 257 return (0); 258 259 #ifdef DEBUG 260 if (ahsc_dmadebug & DDB_FOLLOW) 261 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 262 #endif 263 264 /* 265 * both, SCSI and DMA interrupts arrive here. I chose 266 * arbitrarily that DMA interrupts should have higher 267 * precedence than SCSI interrupts. 268 */ 269 found = 0; 270 if (stat & ISTR_E_INT) { 271 ++found; 272 273 sdp->CINT = 1; /* clear possible interrupt */ 274 275 /* 276 * check for SCSI ints in the same go and 277 * eventually save an interrupt 278 */ 279 } 280 281 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 282 found += sbicintr(dev); 283 return(found); 284 } 285 286 287 int 288 ahsc_dmanext(struct sbic_softc *dev) 289 { 290 volatile struct sdmac *sdp; 291 292 sdp = dev->sc_cregs; 293 294 if (dev->sc_cur > dev->sc_last) { 295 /* shouldn't happen !! */ 296 printf("ahsc_dmanext at end !!!\n"); 297 ahsc_dmastop(dev); 298 return(0); 299 } 300 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 301 /* 302 * only FLUSH if terminal count not enabled, 303 * and reading from peripheral 304 */ 305 sdp->FLUSH = 1; 306 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 307 ; 308 } 309 /* 310 * clear possible interrupt and stop DMA 311 */ 312 sdp->CINT = 1; /* clear possible interrupt */ 313 sdp->SP_DMA = 1; /* stop DMA */ 314 sdp->CNTR = dev->sc_dmacmd; 315 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 316 sdp->ST_DMA = 1; 317 318 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 319 return(dev->sc_tcnt); 320 } 321 322 #ifdef DEBUG 323 void 324 ahsc_dump(void) 325 { 326 extern struct cfdriver ahsc_cd; 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