flsc.c revision 1.1
1 /* 2 * Copyright (c) 1995 Daniel Widenfalk 3 * Copyright (c) 1994 Christian E. Hopps 4 * Copyright (c) 1982, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)dma.c 36 */ 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 <vm/vm.h> 45 #include <vm/vm_kern.h> 46 #include <vm/vm_page.h> 47 #include <machine/pmap.h> 48 #include <amiga/amiga/custom.h> 49 #include <amiga/amiga/cc.h> 50 #include <amiga/amiga/device.h> 51 #include <amiga/amiga/isr.h> 52 #include <amiga/dev/sfasreg.h> 53 #include <amiga/dev/sfasvar.h> 54 #include <amiga/dev/zbusvar.h> 55 #include <amiga/dev/flscreg.h> 56 #include <amiga/dev/flscvar.h> 57 58 int flscprint __P((void *auxp, char *)); 59 void flscattach __P((struct device *, struct device *, void *)); 60 int flscmatch __P((struct device *, struct cfdata *, void *)); 61 62 struct scsi_adapter flsc_scsiswitch = { 63 sfas_scsicmd, 64 sfas_minphys, 65 0, /* no lun support */ 66 0, /* no lun support */ 67 }; 68 69 struct scsi_device flsc_scsidev = { 70 NULL, /* use default error handler */ 71 NULL, /* do not have a start functio */ 72 NULL, /* have no async handler */ 73 NULL, /* Use default done routine */ 74 }; 75 76 77 struct cfdriver flsccd = { 78 NULL, "flsc", (cfmatch_t)flscmatch, flscattach, 79 DV_DULL, sizeof(struct flsc_softc), NULL, 0 }; 80 81 int flsc_intr __P((struct sfas_softc *dev)); 82 int flsc_setup_dma __P((struct sfas_softc *sc, void *ptr, int len, 83 int mode)); 84 int flsc_build_dma_chain __P((struct sfas_softc *sc, 85 struct sfas_dma_chain *chain, void *p, int l)); 86 int flsc_need_bump __P((struct sfas_softc *sc, void *ptr, int len)); 87 void flsc_led __P((struct sfas_softc *sc, int mode)); 88 89 /* 90 * if we are an Advanced Systems & Software FastlaneZ3 91 */ 92 int 93 flscmatch(pdp, cdp, auxp) 94 struct device *pdp; 95 struct cfdata *cdp; 96 void *auxp; 97 { 98 struct zbus_args *zap; 99 100 if (!is_a4000() && !is_a3000()) 101 return(0); 102 103 zap = auxp; 104 if (zap->manid == 0x2140 && zap->prodid == 11) 105 return(1); 106 107 return(0); 108 } 109 110 void 111 flscattach(pdp, dp, auxp) 112 struct device *pdp; 113 struct device *dp; 114 void *auxp; 115 { 116 struct flsc_softc *sc; 117 struct zbus_args *zap; 118 flsc_regmap_p rp; 119 vu_char *fas; 120 121 zap = auxp; 122 fas = &((vu_char *)zap->va)[0x1000001]; 123 124 sc = (struct flsc_softc *)dp; 125 rp = &sc->sc_regmap; 126 127 rp->FAS216.sfas_tc_low = &fas[0x00]; 128 rp->FAS216.sfas_tc_mid = &fas[0x04]; 129 rp->FAS216.sfas_fifo = &fas[0x08]; 130 rp->FAS216.sfas_command = &fas[0x0C]; 131 rp->FAS216.sfas_dest_id = &fas[0x10]; 132 rp->FAS216.sfas_timeout = &fas[0x14]; 133 rp->FAS216.sfas_syncper = &fas[0x18]; 134 rp->FAS216.sfas_syncoff = &fas[0x1C]; 135 rp->FAS216.sfas_config1 = &fas[0x20]; 136 rp->FAS216.sfas_clkconv = &fas[0x24]; 137 rp->FAS216.sfas_test = &fas[0x28]; 138 rp->FAS216.sfas_config2 = &fas[0x2C]; 139 rp->FAS216.sfas_config3 = &fas[0x30]; 140 rp->FAS216.sfas_tc_high = &fas[0x38]; 141 rp->FAS216.sfas_fifo_bot = &fas[0x3C]; 142 rp->hardbits = &fas[0x40]; 143 rp->clear = &fas[0x80]; 144 rp->dmabase = zap->va; 145 146 sc->sc_softc.sc_fas = (sfas_regmap_p)rp; 147 sc->sc_softc.sc_spec = &sc->sc_specific; 148 149 sc->sc_softc.sc_led = flsc_led; 150 151 sc->sc_softc.sc_setup_dma = flsc_setup_dma; 152 sc->sc_softc.sc_build_dma_chain = flsc_build_dma_chain; 153 sc->sc_softc.sc_need_bump = flsc_need_bump; 154 155 sc->sc_softc.sc_clock_freq = 40; /* FastlaneZ3 runs at 40MHz */ 156 sc->sc_softc.sc_timeout = 250; /* Set default timeout to 250ms */ 157 sc->sc_softc.sc_config_flags = 0; /* No config flags yet */ 158 sc->sc_softc.sc_host_id = 7; /* Should check the jumpers */ 159 160 sc->sc_specific.portbits = 0xA0 | FLSC_PB_EDI | FLSC_PB_ESI; 161 sc->sc_specific.hardbits = *rp->hardbits; 162 163 sc->sc_softc.sc_bump_sz = NBPG; 164 sc->sc_softc.sc_bump_pa = 0x0; 165 166 sfasinitialize((struct sfas_softc *)sc); 167 168 sc->sc_softc.sc_link.adapter_softc = sc; 169 sc->sc_softc.sc_link.adapter_target = sc->sc_softc.sc_host_id; 170 sc->sc_softc.sc_link.adapter = &flsc_scsiswitch; 171 sc->sc_softc.sc_link.device = &flsc_scsidev; 172 sc->sc_softc.sc_link.openings = 1; 173 174 sc->sc_softc.sc_isr.isr_intr = flsc_intr; 175 sc->sc_softc.sc_isr.isr_arg = &sc->sc_softc; 176 sc->sc_softc.sc_isr.isr_ipl = 2; 177 add_isr(&sc->sc_softc.sc_isr); 178 179 /* We don't want interrupt until we're initialized! */ 180 *rp->hardbits = sc->sc_specific.portbits; 181 182 printf("\n"); 183 184 /* attach all scsi units on us */ 185 config_found(dp, &sc->sc_softc.sc_link, flscprint); 186 } 187 188 /* print diag if pnp is NULL else just extra */ 189 int 190 flscprint(auxp, pnp) 191 void *auxp; 192 char *pnp; 193 { 194 if (pnp == NULL) 195 return(UNCONF); 196 197 return(QUIET); 198 } 199 200 int 201 flsc_intr(dev) 202 struct sfas_softc *dev; 203 { 204 flsc_regmap_p rp; 205 struct flsc_specific *flspec; 206 int quickints; 207 u_char hb; 208 209 flspec = dev->sc_spec; 210 rp = (flsc_regmap_p)dev->sc_fas; 211 hb = *rp->hardbits; 212 213 if (hb & FLSC_HB_IACT) 214 return(0); 215 216 flspec->hardbits = hb; 217 if ((hb & FLSC_HB_CREQ) && 218 !(hb & FLSC_HB_MINT) && 219 (*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING)) { 220 quickints = 16; 221 do { 222 dev->sc_status = *rp->FAS216.sfas_status; 223 dev->sc_interrupt = *rp->FAS216.sfas_interrupt; 224 225 if (dev->sc_interrupt & SFAS_INT_RESELECTED) { 226 dev->sc_resel[0] = *rp->FAS216.sfas_fifo; 227 dev->sc_resel[1] = *rp->FAS216.sfas_fifo; 228 } 229 sfasintr(dev); 230 231 } while((*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING) 232 && --quickints); 233 } 234 235 /* Reset fastlane interrupt bits */ 236 *rp->hardbits = flspec->portbits & ~FLSC_PB_INT_BITS; 237 *rp->hardbits = flspec->portbits; 238 239 return(1); 240 } 241 242 /* Load transfer adress into dma register */ 243 void 244 flsc_set_dma_adr(sc, ptr) 245 struct sfas_softc *sc; 246 void *ptr; 247 { 248 flsc_regmap_p rp; 249 unsigned int *p; 250 unsigned int d; 251 252 rp = (flsc_regmap_p)sc->sc_fas; 253 254 d = (unsigned int)ptr; 255 p = (unsigned int *)((d & 0xFFFFFF) + (int)rp->dmabase); 256 257 *rp->clear=0; 258 *p = d; 259 } 260 261 /* Set DMA transfer counter */ 262 void 263 flsc_set_dma_tc(sc, len) 264 struct sfas_softc *sc; 265 unsigned int len; 266 { 267 *sc->sc_fas->sfas_tc_low = len; len >>= 8; 268 *sc->sc_fas->sfas_tc_mid = len; len >>= 8; 269 *sc->sc_fas->sfas_tc_high = len; 270 } 271 272 /* Set DMA mode */ 273 void 274 flsc_set_dma_mode(sc, mode) 275 struct sfas_softc *sc; 276 int mode; 277 { 278 struct flsc_specific *spec; 279 280 spec = sc->sc_spec; 281 282 spec->portbits = (spec->portbits & ~FLSC_PB_DMA_BITS) | mode; 283 *((flsc_regmap_p)sc->sc_fas)->hardbits = spec->portbits; 284 } 285 286 /* Initialize DMA for transfer */ 287 int 288 flsc_setup_dma(sc, ptr, len, mode) 289 struct sfas_softc *sc; 290 void *ptr; 291 int len; 292 int mode; 293 { 294 int retval; 295 296 retval = 0; 297 298 switch(mode) { 299 case SFAS_DMA_READ: 300 case SFAS_DMA_WRITE: 301 flsc_set_dma_adr(sc, ptr); 302 if (mode == SFAS_DMA_READ) 303 flsc_set_dma_mode(sc,FLSC_PB_ENABLE_DMA | FLSC_PB_DMA_READ); 304 else 305 flsc_set_dma_mode(sc,FLSC_PB_ENABLE_DMA | FLSC_PB_DMA_WRITE); 306 307 flsc_set_dma_tc(sc, len); 308 break; 309 310 case SFAS_DMA_CLEAR: 311 default: 312 flsc_set_dma_mode(sc, FLSC_PB_DISABLE_DMA); 313 flsc_set_dma_adr(sc, 0); 314 315 retval = (*sc->sc_fas->sfas_tc_high << 16) | 316 (*sc->sc_fas->sfas_tc_mid << 8) | 317 *sc->sc_fas->sfas_tc_low; 318 319 flsc_set_dma_tc(sc, 0); 320 break; 321 } 322 323 return(retval); 324 } 325 326 /* Check if address and len is ok for DMA transfer */ 327 int 328 flsc_need_bump(sc, ptr, len) 329 struct sfas_softc *sc; 330 void *ptr; 331 int len; 332 { 333 int p; 334 335 p = (int)ptr & 0x03; 336 337 if (p) { 338 p = 4-p; 339 340 if (len < 256) 341 p = len; 342 } 343 344 return(p); 345 } 346 347 /* Interrupt driven routines */ 348 int 349 flsc_build_dma_chain(sc, chain, p, l) 350 struct sfas_softc *sc; 351 struct sfas_dma_chain *chain; 352 void *p; 353 int l; 354 { 355 vm_offset_t pa, lastpa; 356 char *ptr; 357 int len, prelen, postlen, max_t, n; 358 359 if (l == 0) 360 return(0); 361 362 #define set_link(n, p, l, f)\ 363 do { chain[n].ptr = (p); chain[n].len = (l); chain[n++].flg = (f); } while(0) 364 365 n = 0; 366 367 if (l < 512) 368 set_link(n, (vm_offset_t)p, l, SFAS_CHAIN_BUMP); 369 else if ((p >= (void *)0xFF000000) 370 #if M68040 371 && (cpu040 && (p >= (void *)0xFFFC0000)) 372 #endif 373 ) { 374 while(l != 0) { 375 len = ((l > sc->sc_bump_sz) ? sc->sc_bump_sz : l); 376 377 set_link(n, (vm_offset_t)p, len, SFAS_CHAIN_BUMP); 378 379 p += len; 380 l -= len; 381 } 382 } else { 383 ptr = p; 384 len = l; 385 386 pa = kvtop(ptr); 387 prelen = ((int)ptr & 0x03); 388 389 if (prelen) { 390 prelen = 4-prelen; 391 set_link(n, (vm_offset_t)ptr, prelen, SFAS_CHAIN_BUMP); 392 ptr += prelen; 393 len -= prelen; 394 } 395 396 lastpa = 0; 397 while(len > 3) { 398 pa = kvtop(ptr); 399 max_t = NBPG - (pa & PGOFSET); 400 if (max_t > len) 401 max_t = len; 402 403 max_t &= ~3; 404 405 if (lastpa == pa) 406 sc->sc_chain[n-1].len += max_t; 407 else 408 set_link(n, pa, max_t, SFAS_CHAIN_DMA); 409 410 lastpa = pa+max_t; 411 412 ptr += max_t; 413 len -= max_t; 414 } 415 416 if (len) 417 set_link(n, (vm_offset_t)ptr, len, SFAS_CHAIN_BUMP); 418 } 419 420 return(n); 421 } 422 423 /* Turn on/off led */ 424 void 425 flsc_led(sc, mode) 426 struct sfas_softc *sc; 427 int mode; 428 { 429 struct flsc_specific *spec; 430 flsc_regmap_p rp; 431 432 spec = sc->sc_spec; 433 rp = (flsc_regmap_p)sc->sc_fas; 434 435 if (mode) { 436 sc->sc_led_status++; 437 438 spec->portbits |= FLSC_PB_LED; 439 *rp->hardbits = spec->portbits; 440 } else { 441 if (sc->sc_led_status) 442 sc->sc_led_status--; 443 444 if (!sc->sc_led_status) { 445 spec->portbits &= ~FLSC_PB_LED; 446 *rp->hardbits = spec->portbits; 447 } 448 } 449 } 450
Indexes created Thu Oct 02 14:10:14 GMT 2025