bzsc.c revision 1.8
1 /* $NetBSD: bzsc.c,v 1.8 1996/06/10 16:11:20 is Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Daniel Widenfalk 5 * Copyright (c) 1994 Christian E. Hopps 6 * Copyright (c) 1982, 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)dma.c 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/device.h> 44 #include <scsi/scsi_all.h> 45 #include <scsi/scsiconf.h> 46 #include <vm/vm.h> 47 #include <vm/vm_kern.h> 48 #include <vm/vm_page.h> 49 #include <machine/pmap.h> 50 #include <amiga/amiga/custom.h> 51 #include <amiga/amiga/cc.h> 52 #include <amiga/amiga/device.h> 53 #include <amiga/amiga/isr.h> 54 #include <amiga/dev/sfasreg.h> 55 #include <amiga/dev/sfasvar.h> 56 #include <amiga/dev/zbusvar.h> 57 #include <amiga/dev/bzscreg.h> 58 #include <amiga/dev/bzscvar.h> 59 60 int bzscprint __P((void *auxp, char *)); 61 void bzscattach __P((struct device *, struct device *, void *)); 62 int bzscmatch __P((struct device *, void *, void *)); 63 64 struct scsi_adapter bzsc_scsiswitch = { 65 sfas_scsicmd, 66 sfas_minphys, 67 0, /* no lun support */ 68 0, /* no lun support */ 69 }; 70 71 struct scsi_device bzsc_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 struct cfattach bzsc_ca = { 79 sizeof(struct bzsc_softc), bzscmatch, bzscattach 80 }; 81 82 struct cfdriver bzsc_cd = { 83 NULL, "bzsc", DV_DULL, NULL, 0 84 }; 85 86 int bzsc_intr __P((void *)); 87 void bzsc_set_dma_adr __P((struct sfas_softc *sc, vm_offset_t ptr, int mode)); 88 void bzsc_set_dma_tc __P((struct sfas_softc *sc, unsigned int len)); 89 int bzsc_setup_dma __P((struct sfas_softc *sc, vm_offset_t ptr, int len, 90 int mode)); 91 int bzsc_build_dma_chain __P((struct sfas_softc *sc, 92 struct sfas_dma_chain *chain, void *p, int l)); 93 int bzsc_need_bump __P((struct sfas_softc *sc, vm_offset_t ptr, int len)); 94 void bzsc_led_dummy __P((struct sfas_softc *sc, int mode)); 95 96 /* 97 * if we are an Advanced Systems & Software FastlaneZ3 98 */ 99 int 100 bzscmatch(pdp, match, auxp) 101 struct device *pdp; 102 void *match, *auxp; 103 { 104 struct zbus_args *zap; 105 106 if (!is_a1200()) 107 return(0); 108 109 zap = auxp; 110 if (zap->manid == 0x2140 && zap->prodid == 11) 111 return(1); 112 113 return(0); 114 } 115 116 void 117 bzscattach(pdp, dp, auxp) 118 struct device *pdp; 119 struct device *dp; 120 void *auxp; 121 { 122 struct bzsc_softc *sc; 123 struct zbus_args *zap; 124 bzsc_regmap_p rp; 125 vu_char *fas; 126 127 zap = auxp; 128 fas = (vu_char *)(((char *)zap->va)+0x10000); 129 130 sc = (struct bzsc_softc *)dp; 131 rp = &sc->sc_regmap; 132 133 rp->FAS216.sfas_tc_low = &fas[0x00]; 134 rp->FAS216.sfas_tc_mid = &fas[0x02]; 135 rp->FAS216.sfas_fifo = &fas[0x04]; 136 rp->FAS216.sfas_command = &fas[0x06]; 137 rp->FAS216.sfas_dest_id = &fas[0x08]; 138 rp->FAS216.sfas_timeout = &fas[0x0A]; 139 rp->FAS216.sfas_syncper = &fas[0x0C]; 140 rp->FAS216.sfas_syncoff = &fas[0x0E]; 141 rp->FAS216.sfas_config1 = &fas[0x10]; 142 rp->FAS216.sfas_clkconv = &fas[0x12]; 143 rp->FAS216.sfas_test = &fas[0x14]; 144 rp->FAS216.sfas_config2 = &fas[0x16]; 145 rp->FAS216.sfas_config3 = &fas[0x18]; 146 rp->FAS216.sfas_tc_high = &fas[0x1C]; 147 rp->FAS216.sfas_fifo_bot = &fas[0x1E]; 148 rp->cclkaddr = &fas[0x21]; 149 rp->epowaddr = &fas[0x31]; 150 151 sc->sc_softc.sc_fas = (sfas_regmap_p)rp; 152 sc->sc_softc.sc_spec = 0; 153 154 sc->sc_softc.sc_led = bzsc_led_dummy; 155 156 sc->sc_softc.sc_setup_dma = bzsc_setup_dma; 157 sc->sc_softc.sc_build_dma_chain = bzsc_build_dma_chain; 158 sc->sc_softc.sc_need_bump = bzsc_need_bump; 159 160 sc->sc_softc.sc_clock_freq = 40; /* BlizzardII 1230 runs at 40MHz? */ 161 sc->sc_softc.sc_timeout = 250; /* Set default timeout to 250ms */ 162 sc->sc_softc.sc_config_flags = 0; 163 sc->sc_softc.sc_host_id = 7; 164 165 sc->sc_softc.sc_bump_sz = NBPG; 166 sc->sc_softc.sc_bump_pa = 0x0; 167 168 sfasinitialize((struct sfas_softc *)sc); 169 170 sc->sc_softc.sc_link.adapter_softc = sc; 171 sc->sc_softc.sc_link.adapter_target = sc->sc_softc.sc_host_id; 172 sc->sc_softc.sc_link.adapter = &bzsc_scsiswitch; 173 sc->sc_softc.sc_link.device = &bzsc_scsidev; 174 sc->sc_softc.sc_link.openings = 1; 175 176 printf("\n"); 177 178 sc->sc_softc.sc_isr.isr_intr = bzsc_intr; 179 sc->sc_softc.sc_isr.isr_arg = &sc->sc_softc; 180 sc->sc_softc.sc_isr.isr_ipl = 2; 181 add_isr(&sc->sc_softc.sc_isr); 182 183 /* attach all scsi units on us */ 184 config_found(dp, &sc->sc_softc.sc_link, bzscprint); 185 } 186 187 /* print diag if pnp is NULL else just extra */ 188 int 189 bzscprint(auxp, pnp) 190 void *auxp; 191 char *pnp; 192 { 193 if (pnp == NULL) 194 return(UNCONF); 195 196 return(QUIET); 197 } 198 199 int 200 bzsc_intr(arg) 201 void *arg; 202 { 203 struct sfas_softc *dev = arg; 204 bzsc_regmap_p rp; 205 int quickints; 206 207 rp = (bzsc_regmap_p)dev->sc_fas; 208 209 if (!(*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING)) 210 return(0); 211 212 quickints = 16; 213 do { 214 dev->sc_status = *rp->FAS216.sfas_status; 215 dev->sc_interrupt = *rp->FAS216.sfas_interrupt; 216 217 if (dev->sc_interrupt & SFAS_INT_RESELECTED) { 218 dev->sc_resel[0] = *rp->FAS216.sfas_fifo; 219 dev->sc_resel[1] = *rp->FAS216.sfas_fifo; 220 } 221 sfasintr(dev); 222 } while((*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING) && 223 --quickints); 224 225 return(1); 226 } 227 228 /* --------- */ 229 void 230 bzsc_set_dma_adr(sc, ptr, mode) 231 struct sfas_softc *sc; 232 vm_offset_t ptr; 233 int mode; 234 { 235 bzsc_regmap_p rp; 236 unsigned long p; 237 238 rp = (bzsc_regmap_p)sc->sc_fas; 239 240 p = ((unsigned long)ptr)>>1; 241 242 if (mode == SFAS_DMA_WRITE) 243 p |= BZSC_DMA_WRITE; 244 else 245 p |= BZSC_DMA_READ; 246 247 *rp->epowaddr = (u_char)(p>>24) & 0xFF; 248 *rp->cclkaddr = (u_char)(p>>16) & 0xFF; 249 *rp->cclkaddr = (u_char)(p>> 8) & 0xFF; 250 *rp->cclkaddr = (u_char)(p ) & 0xFF; 251 } 252 253 /* Set DMA transfer counter */ 254 void 255 bzsc_set_dma_tc(sc, len) 256 struct sfas_softc *sc; 257 unsigned int len; 258 { 259 *sc->sc_fas->sfas_tc_low = len; len >>= 8; 260 *sc->sc_fas->sfas_tc_mid = len; len >>= 8; 261 *sc->sc_fas->sfas_tc_high = len; 262 } 263 264 /* Initialize DMA for transfer */ 265 int 266 bzsc_setup_dma(sc, ptr, len, mode) 267 struct sfas_softc *sc; 268 vm_offset_t ptr; 269 int len; 270 int mode; 271 { 272 int retval; 273 274 retval = 0; 275 276 switch(mode) { 277 case SFAS_DMA_READ: 278 case SFAS_DMA_WRITE: 279 bzsc_set_dma_adr(sc, ptr, mode); 280 bzsc_set_dma_tc(sc, len); 281 break; 282 case SFAS_DMA_CLEAR: 283 default: 284 retval = (*sc->sc_fas->sfas_tc_high << 16) | 285 (*sc->sc_fas->sfas_tc_mid << 8) | 286 *sc->sc_fas->sfas_tc_low; 287 288 bzsc_set_dma_tc(sc, 0); 289 break; 290 } 291 292 return(retval); 293 } 294 295 /* Check if address and len is ok for DMA transfer */ 296 int 297 bzsc_need_bump(sc, ptr, len) 298 struct sfas_softc *sc; 299 vm_offset_t ptr; 300 int len; 301 { 302 int p; 303 304 p = (int)ptr & 0x03; 305 306 if (p) { 307 p = 4-p; 308 309 if (len < 256) 310 p = len; 311 } 312 313 return(p); 314 } 315 316 /* Interrupt driven routines */ 317 int 318 bzsc_build_dma_chain(sc, chain, p, l) 319 struct sfas_softc *sc; 320 struct sfas_dma_chain *chain; 321 void *p; 322 int l; 323 { 324 int n; 325 326 if (!l) 327 return(0); 328 329 #define set_link(n, p, l, f)\ 330 do { chain[n].ptr = (p); chain[n].len = (l); chain[n++].flg = (f); } while(0) 331 332 n = 0; 333 334 if (l < 512) 335 set_link(n, (vm_offset_t)p, l, SFAS_CHAIN_BUMP); 336 else if ( 337 #if defined(M68040) || defined(M68060) 338 ((mmutype == MMU_68040) && ((vm_offset_t)p >= 0xFFFC0000)) && 339 #endif 340 ((vm_offset_t)p >= 0xFF000000)) { 341 int len; 342 343 while(l) { 344 len = ((l > sc->sc_bump_sz) ? sc->sc_bump_sz : l); 345 346 set_link(n, (vm_offset_t)p, len, SFAS_CHAIN_BUMP); 347 348 p += len; 349 l -= len; 350 } 351 } else { 352 char *ptr; 353 vm_offset_t pa, lastpa; 354 int len, prelen, max_t; 355 356 ptr = p; 357 len = l; 358 359 pa = kvtop(ptr); 360 prelen = ((int)ptr & 0x03); 361 362 if (prelen) { 363 prelen = 4-prelen; 364 set_link(n, (vm_offset_t)ptr, prelen, SFAS_CHAIN_BUMP); 365 ptr += prelen; 366 len -= prelen; 367 } 368 369 lastpa = 0; 370 while(len > 3) { 371 pa = kvtop(ptr); 372 max_t = NBPG - (pa & PGOFSET); 373 if (max_t > len) 374 max_t = len; 375 376 max_t &= ~3; 377 378 if (lastpa == pa) 379 sc->sc_chain[n-1].len += max_t; 380 else 381 set_link(n, pa, max_t, SFAS_CHAIN_DMA); 382 383 lastpa = pa+max_t; 384 385 ptr += max_t; 386 len -= max_t; 387 } 388 389 if (len) 390 set_link(n, (vm_offset_t)ptr, len, SFAS_CHAIN_BUMP); 391 } 392 393 return(n); 394 } 395 396 /* Turn on led */ 397 void bzsc_led_dummy(sc, mode) 398 struct sfas_softc *sc; 399 int mode; 400 { 401 } 402
Indexes created Tue Sep 30 17:09:57 GMT 2025