1 /* $NetBSD: atzsc.c,v 1.33 2002/10/02 04:55:48 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 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: atzsc.c,v 1.33 2002/10/02 04:55:48 thorpej 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/device.h> 52 #include <amiga/amiga/isr.h> 53 #include <amiga/dev/dmavar.h> 54 #include <amiga/dev/sbicreg.h> 55 #include <amiga/dev/sbicvar.h> 56 #include <amiga/dev/atzscreg.h> 57 #include <amiga/dev/zbusvar.h> 58 59 void atzscattach(struct device *, struct device *, void *); 60 int atzscmatch(struct device *, struct cfdata *, void *); 61 62 void atzsc_enintr(struct sbic_softc *); 63 void atzsc_dmastop(struct sbic_softc *); 64 int atzsc_dmanext(struct sbic_softc *); 65 int atzsc_dmaintr(void *); 66 int atzsc_dmago(struct sbic_softc *, char *, int, int); 67 68 #ifdef DEBUG 69 void atzsc_dump(void); 70 #endif 71 72 #ifdef DEBUG 73 int atzsc_dmadebug = 0; 74 #endif 75 76 CFATTACH_DECL(atzsc, sizeof(struct sbic_softc), 77 atzscmatch, atzscattach, NULL, NULL); 78 79 /* 80 * if we are an A3000 we are here. 81 */ 82 int 83 atzscmatch(struct device *pdp, struct cfdata *cfp, void *auxp) 84 { 85 struct zbus_args *zap; 86 87 zap = auxp; 88 89 /* 90 * Check manufacturer and product id. 91 * I was informed that older boards can be 2 also. 92 */ 93 if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2)) 94 return(1); 95 else 96 return(0); 97 } 98 99 void 100 atzscattach(struct device *pdp, struct device *dp, void *auxp) 101 { 102 volatile struct sdmac *rp; 103 struct sbic_softc *sc = (struct sbic_softc *)dp; 104 struct zbus_args *zap; 105 struct scsipi_adapter *adapt = &sc->sc_adapter; 106 struct scsipi_channel *chan = &sc->sc_channel; 107 108 zap = auxp; 109 110 sc->sc_cregs = rp = zap->va; 111 /* 112 * disable ints and reset bank register 113 */ 114 rp->CNTR = CNTR_PDMD; 115 rp->DAWR = DAWR_ATZSC; 116 sc->sc_enintr = atzsc_enintr; 117 sc->sc_dmago = atzsc_dmago; 118 sc->sc_dmanext = atzsc_dmanext; 119 sc->sc_dmastop = atzsc_dmastop; 120 sc->sc_dmacmd = 0; 121 122 /* 123 * only 24 bit mem. 124 */ 125 sc->sc_flags |= SBICF_BADDMA; 126 sc->sc_dmamask = ~0x00ffffff; 127 #if 0 128 /* 129 * If the users kva space is not ztwo try and allocate a bounce buffer. 130 * XXX this needs to change if we move to multiple memory segments. 131 */ 132 if (kvtop(sc) & sc->sc_dmamask) { 133 sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */ 134 if (isztwomem(sc->sc_dmabuffer)) 135 printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); 136 else if (sc->sc_dmabuffer) 137 printf(" bounce pa 0x%x", 138 PREP_DMA_MEM(sc->sc_dmabuffer)); 139 } 140 #endif 141 sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91; 142 sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93; 143 144 sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77; 145 146 printf(": dmamask 0x%lx\n", ~sc->sc_dmamask); 147 148 /* 149 * Fill in the scsipi_adapter. 150 */ 151 memset(adapt, 0, sizeof(*adapt)); 152 adapt->adapt_dev = &sc->sc_dev; 153 adapt->adapt_nchannels = 1; 154 adapt->adapt_openings = 7; 155 adapt->adapt_max_periph = 1; 156 adapt->adapt_request = sbic_scsipi_request; 157 adapt->adapt_minphys = sbic_minphys; 158 159 /* 160 * Fill in the scsipi_channel. 161 */ 162 memset(chan, 0, sizeof(*chan)); 163 chan->chan_adapter = adapt; 164 chan->chan_bustype = &scsi_bustype; 165 chan->chan_channel = 0; 166 chan->chan_ntargets = 8; 167 chan->chan_nluns = 8; 168 chan->chan_id = 7; 169 170 sbicinit(sc); 171 172 sc->sc_isr.isr_intr = atzsc_dmaintr; 173 sc->sc_isr.isr_arg = sc; 174 sc->sc_isr.isr_ipl = 2; 175 add_isr (&sc->sc_isr); 176 177 /* 178 * attach all scsi units on us 179 */ 180 config_found(dp, chan, scsiprint); 181 } 182 183 void 184 atzsc_enintr(struct sbic_softc *dev) 185 { 186 volatile struct sdmac *sdp; 187 188 sdp = dev->sc_cregs; 189 190 dev->sc_flags |= SBICF_INTR; 191 sdp->CNTR = CNTR_PDMD | CNTR_INTEN; 192 } 193 194 int 195 atzsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags) 196 { 197 volatile struct sdmac *sdp; 198 199 sdp = dev->sc_cregs; 200 /* 201 * Set up the command word based on flags 202 */ 203 dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; 204 if ((flags & DMAGO_READ) == 0) 205 dev->sc_dmacmd |= CNTR_DDIR; 206 #ifdef DEBUG 207 if (atzsc_dmadebug & DDB_IO) 208 printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd); 209 #endif 210 211 dev->sc_flags |= SBICF_INTR; 212 sdp->CNTR = dev->sc_dmacmd; 213 sdp->ACR = (u_int) dev->sc_cur->dc_addr; 214 sdp->ST_DMA = 1; 215 216 return(dev->sc_tcnt); 217 } 218 219 void 220 atzsc_dmastop(struct sbic_softc *dev) 221 { 222 volatile struct sdmac *sdp; 223 int s; 224 225 sdp = dev->sc_cregs; 226 227 #ifdef DEBUG 228 if (atzsc_dmadebug & DDB_FOLLOW) 229 printf("atzsc_dmastop()\n"); 230 #endif 231 if (dev->sc_dmacmd) { 232 s = splbio(); 233 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 234 /* 235 * only FLUSH if terminal count not enabled, 236 * and reading from peripheral 237 */ 238 sdp->FLUSH = 1; 239 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 240 ; 241 } 242 /* 243 * clear possible interrupt and stop dma 244 */ 245 sdp->CINT = 1; 246 sdp->SP_DMA = 1; 247 dev->sc_dmacmd = 0; 248 splx(s); 249 } 250 } 251 252 int 253 atzsc_dmaintr(void *arg) 254 { 255 struct sbic_softc *dev = arg; 256 volatile struct sdmac *sdp; 257 int stat, found; 258 259 sdp = dev->sc_cregs; 260 stat = sdp->ISTR; 261 262 if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) 263 return (0); 264 265 #ifdef DEBUG 266 if (atzsc_dmadebug & DDB_FOLLOW) 267 printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); 268 #endif 269 270 /* 271 * both, SCSI and DMA interrupts arrive here. I chose 272 * arbitrarily that DMA interrupts should have higher 273 * precedence than SCSI interrupts. 274 */ 275 found = 0; 276 if (stat & ISTR_E_INT) { 277 found++; 278 279 sdp->CINT = 1; /* clear possible interrupt */ 280 281 /* 282 * check for SCSI ints in the same go and 283 * eventually save an interrupt 284 */ 285 } 286 287 if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) 288 found += sbicintr(dev); 289 return(found); 290 } 291 292 293 int 294 atzsc_dmanext(struct sbic_softc *dev) 295 { 296 volatile struct sdmac *sdp; 297 298 sdp = dev->sc_cregs; 299 300 if (dev->sc_cur > dev->sc_last) { 301 /* shouldn't happen !! */ 302 printf("atzsc_dmanext at end !!!\n"); 303 atzsc_dmastop(dev); 304 return(0); 305 } 306 if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { 307 /* 308 * only FLUSH if terminal count not enabled, 309 * and reading from peripheral 310 */ 311 sdp->FLUSH = 1; 312 while ((sdp->ISTR & ISTR_FE_FLG) == 0) 313 ; 314 } 315 /* 316 * clear possible interrupt and stop dma 317 */ 318 sdp->CINT = 1; /* clear possible interrupt */ 319 sdp->SP_DMA = 1; /* stop dma */ 320 sdp->CNTR = dev->sc_dmacmd; 321 sdp->ACR = (u_int)dev->sc_cur->dc_addr; 322 sdp->ST_DMA = 1; 323 324 dev->sc_tcnt = dev->sc_cur->dc_count << 1; 325 return(dev->sc_tcnt); 326 } 327 328 #ifdef DEBUG 329 void 330 atzsc_dump(void) 331 { 332 extern struct cfdriver atzsc_cd; 333 int i; 334 335 for (i = 0; i < atzsc_cd.cd_ndevs; ++i) 336 if (atzsc_cd.cd_devs[i]) 337 sbic_dump(atzsc_cd.cd_devs[i]); 338 } 339 #endif 340