atzsc.c revision 1.30
1 /* $NetBSD: atzsc.c,v 1.30 2002/01/26 13:40:53 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/device.h> 48 #include <amiga/amiga/isr.h> 49 #include <amiga/dev/dmavar.h> 50 #include <amiga/dev/sbicreg.h> 51 #include <amiga/dev/sbicvar.h> 52 #include <amiga/dev/atzscreg.h> 53 #include <amiga/dev/zbusvar.h> 54 55 void atzscattach(struct device *, struct device *, void *); 56 int atzscmatch(struct device *, struct cfdata *, void *); 57 58 void atzsc_enintr(struct sbic_softc *); 59 void atzsc_dmastop(struct sbic_softc *); 60 int atzsc_dmanext(struct sbic_softc *); 61 int atzsc_dmaintr(void *); 62 int atzsc_dmago(struct sbic_softc *, char *, int, int); 63 64 #ifdef DEBUG 65 void atzsc_dump(void); 66 #endif 67 68 #ifdef DEBUG 69 int atzsc_dmadebug = 0; 70 #endif 71 72 struct cfattach atzsc_ca = { 73 sizeof(struct sbic_softc), atzscmatch, atzscattach 74 }; 75 76 /* 77 * if we are an A3000 we are here. 78 */ 79 int 80 atzscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 81 { 82 struct zbus_args *zap; 83 84 zap = auxp; 85 86 /* 87 * Check manufacturer and product id. 88 * I was informed that older boards can be 2 also. 89 */ 90 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 91 return(1); 92 else 93 return(0); 94 } 95 96 void 97 atzscattach(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 zbus_args *zap; 102 struct scsipi_adapter *adapt = &sc->sc_adapter; 103 struct scsipi_channel *chan = &sc->sc_channel; 104 105 zap = auxp; 106 107 sc->sc_cregs = rp = zap->va; 108 /* 109 * disable ints and reset bank register 110 */ 111 rp->CNTR = CNTR_PDMD; 112 rp->DAWR = DAWR_ATZSC; 113 sc->sc_enintr = atzsc_enintr; 114 sc->sc_dmago = atzsc_dmago; 115 sc->sc_dmanext = atzsc_dmanext; 116 sc->sc_dmastop = atzsc_dmastop; 117 sc->sc_dmacmd = 0; 118 119 /* 120 * only 24 bit mem. 121 */ 122 sc->sc_flags |= SBICF_BADDMA; 123 sc->sc_dmamask = ~0x00ffffff; 124 #if 0 125 /* 126 * If the users kva space is not ztwo try and allocate a bounce buffer. 127 * XXX this needs to change if we move to multiple memory segments. 128 */ 129 if (kvtop(sc) & sc->sc_dmamask) { 130 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 131 if (isztwomem(sc->sc_dmabuffer)) 132 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 133 else if (sc->sc_dmabuffer) 134 printf(" bounce pa 0x%x", 135 PREP_DMA_MEM(sc->sc_dmabuffer)); 136 } 137 #endif 138 sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 139 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 140 141 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 142 143 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 144 145 /* 146 * Fill in the scsipi_adapter. 147 */ 148 memset(adapt, 0, sizeof(*adapt)); 149 adapt->adapt_dev = &sc->sc_dev; 150 adapt->adapt_nchannels = 1; 151 adapt->adapt_openings = 7; 152 adapt->adapt_max_periph = 1; 153 adapt->adapt_request = sbic_scsipi_request; 154 adapt->adapt_minphys = sbic_minphys; 155 156 /* 157 * Fill in the scsipi_channel. 158 */ 159 memset(chan, 0, sizeof(*chan)); 160 chan->chan_adapter = adapt; 161 chan->chan_bustype = &scsi_bustype; 162 chan->chan_channel = 0; 163 chan->chan_ntargets = 8; 164 chan->chan_nluns = 8; 165 chan->chan_id = 7; 166 167 sbicinit(sc); 168 169 sc->sc_isr.isr_intr = atzsc_dmaintr; 170 sc->sc_isr.isr_arg = sc; 171 sc->sc_isr.isr_ipl = 2; 172 add_isr (&sc->sc_isr); 173 174 /* 175 * attach all scsi units on us 176 */ 177 config_found(dp, chan, scsiprint); 178 } 179 180 void 181 atzsc_enintr(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 atzsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 193 { 194 volatile struct sdmac *sdp; 195 196 sdp = dev->sc_cregs; 197 /* 198 * Set up the command word based on flags 199 */ 200 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 201 if ((flags & DMAGO_READ) == 0) 202 dev->sc_dmacmd |= CNTR_DDIR; 203 #ifdef DEBUG 204 if (atzsc_dmadebug & DDB_IO) 205 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 206 #endif 207 208 dev->sc_flags |= SBICF_INTR; 209 sdp->CNTR = dev->sc_dmacmd; 210 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 211 sdp->ST_DMA = 1; 212 213 return(dev->sc_tcnt); 214 } 215 216 void 217 atzsc_dmastop(struct sbic_softc *dev) 218 { 219 volatile struct sdmac *sdp; 220 int s; 221 222 sdp = dev->sc_cregs; 223 224 #ifdef DEBUG 225 if (atzsc_dmadebug & DDB_FOLLOW) 226 printf("atzsc_dmastop()\n"); 227 #endif 228 if (dev->sc_dmacmd) { 229 s = splbio(); 230 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 231 /* 232 * only FLUSH if terminal count not enabled, 233 * and reading from peripheral 234 */ 235 sdp->FLUSH = 1; 236 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 237 ; 238 } 239 /* 240 * clear possible interrupt and stop dma 241 */ 242 sdp->CINT = 1; 243 sdp->SP_DMA = 1; 244 dev->sc_dmacmd = 0; 245 splx(s); 246 } 247 } 248 249 int 250 atzsc_dmaintr(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 (atzsc_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 atzsc_dmanext(struct sbic_softc *dev) 292 { 293 volatile struct sdmac *sdp; 294 295 sdp = dev->sc_cregs; 296 297 if (dev->sc_cur > dev->sc_last) { 298 /* shouldn't happen !! */ 299 printf("atzsc_dmanext at end !!!\n"); 300 atzsc_dmastop(dev); 301 return(0); 302 } 303 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 304 /* 305 * only FLUSH if terminal count not enabled, 306 * and reading from peripheral 307 */ 308 sdp->FLUSH = 1; 309 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 310 ; 311 } 312 /* 313 * clear possible interrupt and stop dma 314 */ 315 sdp->CINT = 1; /* clear possible interrupt */ 316 sdp->SP_DMA = 1; /* stop dma */ 317 sdp->CNTR = dev->sc_dmacmd; 318 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 319 sdp->ST_DMA = 1; 320 321 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 322 return(dev->sc_tcnt); 323 } 324 325 #ifdef DEBUG 326 void 327 atzsc_dump(void) 328 { 329 extern struct cfdriver atzsc_cd; 330 int i; 331 332 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 333 if (atzsc_cd.cd_devs[i]) 334 sbic_dump(atzsc_cd.cd_devs[i]); 335 } 336 #endif 337
Indexes created Tue Sep 30 17:09:57 GMT 2025