1 /* $NetBSD: tcds.c,v 1.3 2001/11/13 06:26:10 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 42 * All rights reserved. 43 * 44 * Author: Keith Bostic, Chris G. Demetriou 45 * 46 * Permission to use, copy, modify and distribute this software and 47 * its documentation is hereby granted, provided that both the copyright 48 * notice and this permission notice appear in all copies of the 49 * software, derivative works or modified versions, and any portions 50 * thereof, and that both notices appear in supporting documentation. 51 * 52 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 53 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 54 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 55 * 56 * Carnegie Mellon requests users of this software to return to 57 * 58 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 59 * School of Computer Science 60 * Carnegie Mellon University 61 * Pittsburgh PA 15213-3890 62 * 63 * any improvements or extensions that they make and grant Carnegie the 64 * rights to redistribute these changes. 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: tcds.c,v 1.3 2001/11/13 06:26:10 lukem Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/kernel.h> 72 #include <sys/systm.h> 73 #include <sys/device.h> 74 #include <sys/malloc.h> 75 76 #ifdef __alpha__ 77 #include <machine/rpb.h> 78 #endif /* __alpha__ */ 79 80 #include <dev/scsipi/scsi_all.h> 81 #include <dev/scsipi/scsipi_all.h> 82 #include <dev/scsipi/scsiconf.h> 83 84 #include <dev/ic/ncr53c9xvar.h> 85 86 #include <machine/bus.h> 87 88 #include <dev/tc/tcvar.h> 89 #include <dev/tc/tcdsreg.h> 90 #include <dev/tc/tcdsvar.h> 91 92 #include "locators.h" 93 94 struct tcds_softc { 95 struct device sc_dv; 96 bus_space_tag_t sc_bst; 97 bus_space_handle_t sc_bsh; 98 bus_dma_tag_t sc_dmat; 99 void *sc_cookie; 100 int sc_flags; 101 struct tcds_slotconfig sc_slots[2]; 102 }; 103 104 /* sc_flags */ 105 #define TCDSF_BASEBOARD 0x01 /* baseboard on DEC 3000 */ 106 #define TCDSF_FASTSCSI 0x02 /* supports Fast SCSI */ 107 108 /* Definition of the driver for autoconfig. */ 109 int tcdsmatch __P((struct device *, struct cfdata *, void *)); 110 void tcdsattach __P((struct device *, struct device *, void *)); 111 int tcdsprint __P((void *, const char *)); 112 int tcdssubmatch __P((struct device *, struct cfdata *, void *)); 113 114 struct cfattach tcds_ca = { 115 sizeof(struct tcds_softc), tcdsmatch, tcdsattach, 116 }; 117 118 /*static*/ int tcds_intr __P((void *)); 119 /*static*/ int tcds_intrnull __P((void *)); 120 121 struct tcds_device { 122 const char *td_name; 123 int td_flags; 124 } tcds_devices[] = { 125 #ifdef __alpha__ 126 { "PMAZ-DS ", TCDSF_BASEBOARD }, 127 { "PMAZ-FS ", TCDSF_BASEBOARD|TCDSF_FASTSCSI }, 128 #endif /* __alpha__ */ 129 { "PMAZB-AA", 0 }, 130 { "PMAZC-AA", TCDSF_FASTSCSI }, 131 { NULL, 0 }, 132 }; 133 134 struct tcds_device *tcds_lookup __P((const char *)); 135 void tcds_params __P((struct tcds_softc *, int, int *, int *)); 136 137 struct tcds_device * 138 tcds_lookup(modname) 139 const char *modname; 140 { 141 struct tcds_device *td; 142 143 for (td = tcds_devices; td->td_name != NULL; td++) 144 if (strncmp(td->td_name, modname, TC_ROM_LLEN) == 0) 145 return (td); 146 147 return (NULL); 148 } 149 150 int 151 tcdsmatch(parent, cfdata, aux) 152 struct device *parent; 153 struct cfdata *cfdata; 154 void *aux; 155 { 156 struct tc_attach_args *ta = aux; 157 158 return (tcds_lookup(ta->ta_modname) != NULL); 159 } 160 161 void 162 tcdsattach(parent, self, aux) 163 struct device *parent, *self; 164 void *aux; 165 { 166 struct tcds_softc *sc = (struct tcds_softc *)self; 167 struct tc_attach_args *ta = aux; 168 struct tcdsdev_attach_args tcdsdev; 169 struct tcds_slotconfig *slotc; 170 struct tcds_device *td; 171 bus_space_handle_t sbsh[2]; 172 int i, gpi2; 173 const struct evcnt *pevcnt; 174 175 td = tcds_lookup(ta->ta_modname); 176 if (td == NULL) 177 panic("\ntcdsattach: impossible"); 178 179 printf(": TurboChannel Dual SCSI"); 180 if (td->td_flags & TCDSF_BASEBOARD) 181 printf(" (baseboard)"); 182 printf("\n"); 183 184 sc->sc_flags = td->td_flags; 185 186 sc->sc_bst = ta->ta_memt; 187 sc->sc_dmat = ta->ta_dmat; 188 189 /* 190 * Map the device. 191 */ 192 if (bus_space_map(sc->sc_bst, ta->ta_addr, 193 (TCDS_SCSI1_OFFSET + 0x100), 0, &sc->sc_bsh)) { 194 printf("%s: unable to map device\n", sc->sc_dv.dv_xname); 195 return; 196 } 197 198 /* 199 * Now, slice off two subregions for the individual NCR SCSI chips. 200 */ 201 if (bus_space_subregion(sc->sc_bst, sc->sc_bsh, TCDS_SCSI0_OFFSET, 202 0x100, &sbsh[0]) || 203 bus_space_subregion(sc->sc_bst, sc->sc_bsh, TCDS_SCSI1_OFFSET, 204 0x100, &sbsh[1])) { 205 printf("%s: unable to subregion SCSI chip space\n", 206 sc->sc_dv.dv_xname); 207 return; 208 } 209 210 sc->sc_cookie = ta->ta_cookie; 211 212 pevcnt = tc_intr_evcnt(parent, sc->sc_cookie); 213 tc_intr_establish(parent, sc->sc_cookie, TC_IPL_BIO, tcds_intr, sc); 214 215 /* 216 * XXX 217 * IMER apparently has some random (or, not so random, but still 218 * not useful) bits set in it when the system boots. Clear it. 219 */ 220 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER, 0); 221 222 /* XXX Initial contents of CIR? */ 223 224 /* 225 * Remember if GPI2 is set in the CIR; we'll need it later. 226 */ 227 gpi2 = (bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR) & 228 TCDS_CIR_GPI_2) != 0; 229 230 /* 231 * Set up the per-slot defintions for later use. 232 */ 233 234 /* fill in common information first */ 235 for (i = 0; i < 2; i++) { 236 char *cp; 237 238 slotc = &sc->sc_slots[i]; 239 bzero(slotc, sizeof *slotc); /* clear everything */ 240 241 cp = slotc->sc_name; 242 snprintf(cp, sizeof(slotc->sc_name), "chip %d", i); 243 evcnt_attach_dynamic(&slotc->sc_evcnt, EVCNT_TYPE_INTR, 244 pevcnt, sc->sc_dv.dv_xname, cp); 245 246 slotc->sc_slot = i; 247 slotc->sc_bst = sc->sc_bst; 248 slotc->sc_bsh = sc->sc_bsh; 249 slotc->sc_intrhand = tcds_intrnull; 250 slotc->sc_intrarg = (void *)(long)i; 251 } 252 253 /* information for slot 0 */ 254 slotc = &sc->sc_slots[0]; 255 slotc->sc_resetbits = TCDS_CIR_SCSI0_RESET; 256 slotc->sc_intrmaskbits = 257 TCDS_IMER_SCSI0_MASK | TCDS_IMER_SCSI0_ENB; 258 slotc->sc_intrbits = TCDS_CIR_SCSI0_INT; 259 slotc->sc_dmabits = TCDS_CIR_SCSI0_DMAENA; 260 slotc->sc_errorbits = 0; /* XXX */ 261 slotc->sc_sda = TCDS_SCSI0_DMA_ADDR; 262 slotc->sc_dic = TCDS_SCSI0_DMA_INTR; 263 slotc->sc_dud0 = TCDS_SCSI0_DMA_DUD0; 264 slotc->sc_dud1 = TCDS_SCSI0_DMA_DUD1; 265 266 /* information for slot 1 */ 267 slotc = &sc->sc_slots[1]; 268 slotc->sc_resetbits = TCDS_CIR_SCSI1_RESET; 269 slotc->sc_intrmaskbits = 270 TCDS_IMER_SCSI1_MASK | TCDS_IMER_SCSI1_ENB; 271 slotc->sc_intrbits = TCDS_CIR_SCSI1_INT; 272 slotc->sc_dmabits = TCDS_CIR_SCSI1_DMAENA; 273 slotc->sc_errorbits = 0; /* XXX */ 274 slotc->sc_sda = TCDS_SCSI1_DMA_ADDR; 275 slotc->sc_dic = TCDS_SCSI1_DMA_INTR; 276 slotc->sc_dud0 = TCDS_SCSI1_DMA_DUD0; 277 slotc->sc_dud1 = TCDS_SCSI1_DMA_DUD1; 278 279 /* find the hardware attached to the TCDS ASIC */ 280 for (i = 0; i < 2; i++) { 281 tcds_params(sc, i, &tcdsdev.tcdsda_id, 282 &tcdsdev.tcdsda_fast); 283 284 tcdsdev.tcdsda_bst = sc->sc_bst; 285 tcdsdev.tcdsda_bsh = sbsh[i]; 286 tcdsdev.tcdsda_dmat = sc->sc_dmat; 287 tcdsdev.tcdsda_chip = i; 288 tcdsdev.tcdsda_sc = &sc->sc_slots[i]; 289 /* 290 * Determine the chip frequency. TCDSF_FASTSCSI will be set 291 * for TC option cards. For baseboard chips, GPI2 is set, for a 292 * 25MHz clock, else a 40MHz clock. 293 */ 294 if ((sc->sc_flags & TCDSF_BASEBOARD && gpi2 == 0) || 295 sc->sc_flags & TCDSF_FASTSCSI) { 296 tcdsdev.tcdsda_freq = 40000000; 297 tcdsdev.tcdsda_period = tcdsdev.tcdsda_fast ? 4 : 8; 298 } else { 299 tcdsdev.tcdsda_freq = 25000000; 300 tcdsdev.tcdsda_period = 5; 301 } 302 if (sc->sc_flags & TCDSF_BASEBOARD) 303 tcdsdev.tcdsda_variant = NCR_VARIANT_NCR53C94; 304 else 305 tcdsdev.tcdsda_variant = NCR_VARIANT_NCR53C96; 306 307 tcds_scsi_reset(tcdsdev.tcdsda_sc); 308 309 config_found_sm(self, &tcdsdev, tcdsprint, tcdssubmatch); 310 #ifdef __alpha__ 311 /* 312 * The second SCSI chip isn't present on the baseboard TCDS 313 * on the DEC Alpha 3000/300 series. 314 */ 315 if (sc->sc_flags & TCDSF_BASEBOARD && 316 cputype == ST_DEC_3000_300) 317 break; 318 #endif /* __alpha__ */ 319 } 320 } 321 322 int 323 tcdssubmatch(parent, cf, aux) 324 struct device *parent; 325 struct cfdata *cf; 326 void *aux; 327 { 328 struct tcdsdev_attach_args *tcdsdev = aux; 329 330 if (cf->cf_loc[TCDSCF_CHIP] != TCDSCF_CHIP_DEFAULT && 331 cf->cf_loc[TCDSCF_CHIP] != tcdsdev->tcdsda_chip) 332 return (0); 333 334 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 335 } 336 337 int 338 tcdsprint(aux, pnp) 339 void *aux; 340 const char *pnp; 341 { 342 struct tcdsdev_attach_args *tcdsdev = aux; 343 344 /* Only ASCs can attach to TCDSs; easy. */ 345 if (pnp) 346 printf("asc at %s", pnp); 347 348 printf(" chip %d", tcdsdev->tcdsda_chip); 349 350 return (UNCONF); 351 } 352 353 void 354 tcds_intr_establish(tcds, slot, func, arg) 355 struct device *tcds; 356 int slot; 357 int (*func) __P((void *)); 358 void *arg; 359 { 360 struct tcds_softc *sc = (struct tcds_softc *)tcds; 361 362 if (sc->sc_slots[slot].sc_intrhand != tcds_intrnull) 363 panic("tcds_intr_establish: chip %d twice", slot); 364 365 sc->sc_slots[slot].sc_intrhand = func; 366 sc->sc_slots[slot].sc_intrarg = arg; 367 tcds_scsi_reset(&sc->sc_slots[slot]); 368 } 369 370 void 371 tcds_intr_disestablish(tcds, slot) 372 struct device *tcds; 373 int slot; 374 { 375 struct tcds_softc *sc = (struct tcds_softc *)tcds; 376 377 if (sc->sc_slots[slot].sc_intrhand == tcds_intrnull) 378 panic("tcds_intr_disestablish: chip %d missing intr", 379 slot); 380 381 sc->sc_slots[slot].sc_intrhand = tcds_intrnull; 382 sc->sc_slots[slot].sc_intrarg = (void *)(u_long)slot; 383 384 tcds_dma_enable(&sc->sc_slots[slot], 0); 385 tcds_scsi_enable(&sc->sc_slots[slot], 0); 386 } 387 388 int 389 tcds_intrnull(val) 390 void *val; 391 { 392 393 panic("tcds_intrnull: uncaught TCDS intr for chip %lu\n", 394 (u_long)val); 395 } 396 397 void 398 tcds_scsi_reset(sc) 399 struct tcds_slotconfig *sc; 400 { 401 u_int32_t cir; 402 403 tcds_dma_enable(sc, 0); 404 tcds_scsi_enable(sc, 0); 405 406 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 407 TCDS_CIR_CLR(cir, sc->sc_resetbits); 408 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 409 410 DELAY(1); 411 412 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 413 TCDS_CIR_SET(cir, sc->sc_resetbits); 414 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 415 416 tcds_scsi_enable(sc, 1); 417 tcds_dma_enable(sc, 1); 418 } 419 420 void 421 tcds_scsi_enable(sc, on) 422 struct tcds_slotconfig *sc; 423 int on; 424 { 425 u_int32_t imer; 426 427 imer = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER); 428 429 if (on) 430 imer |= sc->sc_intrmaskbits; 431 else 432 imer &= ~sc->sc_intrmaskbits; 433 434 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER, imer); 435 } 436 437 void 438 tcds_dma_enable(sc, on) 439 struct tcds_slotconfig *sc; 440 int on; 441 { 442 u_int32_t cir; 443 444 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 445 446 /* XXX Clear/set IOSLOT/PBS bits. */ 447 if (on) 448 TCDS_CIR_SET(cir, sc->sc_dmabits); 449 else 450 TCDS_CIR_CLR(cir, sc->sc_dmabits); 451 452 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 453 } 454 455 int 456 tcds_scsi_isintr(sc, clear) 457 struct tcds_slotconfig *sc; 458 int clear; 459 { 460 u_int32_t cir; 461 462 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 463 464 if ((cir & sc->sc_intrbits) != 0) { 465 if (clear) { 466 TCDS_CIR_CLR(cir, sc->sc_intrbits); 467 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, 468 cir); 469 } 470 return (1); 471 } else 472 return (0); 473 } 474 475 int 476 tcds_scsi_iserr(sc) 477 struct tcds_slotconfig *sc; 478 { 479 u_int32_t cir; 480 481 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 482 return ((cir & sc->sc_errorbits) != 0); 483 } 484 485 int 486 tcds_intr(arg) 487 void *arg; 488 { 489 struct tcds_softc *sc = arg; 490 u_int32_t ir, ir0; 491 492 /* 493 * XXX 494 * Copy and clear (gag!) the interrupts. 495 */ 496 ir = ir0 = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 497 TCDS_CIR_CLR(ir0, TCDS_CIR_ALLINTR); 498 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, ir0); 499 tc_syncbus(); 500 501 #define INCRINTRCNT(slot) sc->sc_slots[slot].sc_evcnt.ev_count++ 502 503 #define CHECKINTR(slot) \ 504 if (ir & sc->sc_slots[slot].sc_intrbits) { \ 505 INCRINTRCNT(slot); \ 506 (void)(*sc->sc_slots[slot].sc_intrhand) \ 507 (sc->sc_slots[slot].sc_intrarg); \ 508 } 509 CHECKINTR(0); 510 CHECKINTR(1); 511 #undef CHECKINTR 512 513 #ifdef DIAGNOSTIC 514 /* 515 * Interrupts not currently handled, but would like to know if they 516 * occur. 517 * 518 * XXX 519 * Don't know if we have to set the interrupt mask and enable bits 520 * in the IMER to allow some of them to happen? 521 */ 522 #define PRINTINTR(msg, bits) \ 523 if (ir & bits) \ 524 printf("%s: %s", sc->sc_dv.dv_xname, msg); 525 PRINTINTR("SCSI0 DREQ interrupt.\n", TCDS_CIR_SCSI0_DREQ); 526 PRINTINTR("SCSI1 DREQ interrupt.\n", TCDS_CIR_SCSI1_DREQ); 527 PRINTINTR("SCSI0 prefetch interrupt.\n", TCDS_CIR_SCSI0_PREFETCH); 528 PRINTINTR("SCSI1 prefetch interrupt.\n", TCDS_CIR_SCSI1_PREFETCH); 529 PRINTINTR("SCSI0 DMA error.\n", TCDS_CIR_SCSI0_DMA); 530 PRINTINTR("SCSI1 DMA error.\n", TCDS_CIR_SCSI1_DMA); 531 PRINTINTR("SCSI0 DB parity error.\n", TCDS_CIR_SCSI0_DB); 532 PRINTINTR("SCSI1 DB parity error.\n", TCDS_CIR_SCSI1_DB); 533 PRINTINTR("SCSI0 DMA buffer parity error.\n", TCDS_CIR_SCSI0_DMAB_PAR); 534 PRINTINTR("SCSI1 DMA buffer parity error.\n", TCDS_CIR_SCSI1_DMAB_PAR); 535 PRINTINTR("SCSI0 DMA read parity error.\n", TCDS_CIR_SCSI0_DMAR_PAR); 536 PRINTINTR("SCSI1 DMA read parity error.\n", TCDS_CIR_SCSI1_DMAR_PAR); 537 PRINTINTR("TC write parity error.\n", TCDS_CIR_TCIOW_PAR); 538 PRINTINTR("TC I/O address parity error.\n", TCDS_CIR_TCIOA_PAR); 539 #undef PRINTINTR 540 #endif 541 542 /* 543 * XXX 544 * The MACH source had this, with the comment: 545 * This is wrong, but machine keeps dying. 546 */ 547 DELAY(1); 548 549 return (1); 550 } 551 552 void 553 tcds_params(sc, chip, idp, fastp) 554 struct tcds_softc *sc; 555 int chip, *idp, *fastp; 556 { 557 int id, fast; 558 u_int32_t ids; 559 560 #ifdef __alpha__ 561 if (sc->sc_flags & TCDSF_BASEBOARD) { 562 extern u_int8_t dec_3000_scsiid[], dec_3000_scsifast[]; 563 564 id = dec_3000_scsiid[chip]; 565 fast = dec_3000_scsifast[chip]; 566 } else 567 #endif /* __alpha__ */ 568 { 569 /* 570 * SCSI IDs are stored in the EEPROM, along with whether or 571 * not the device is "fast". Chip 0 is the high nibble, 572 * chip 1 the low nibble. 573 */ 574 ids = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_EEPROM_IDS); 575 if (chip == 0) 576 ids >>= 4; 577 578 id = ids & 0x7; 579 fast = ids & 0x8; 580 } 581 582 if (id < 0 || id > 7) { 583 printf("%s: WARNING: bad SCSI ID %d for chip %d, using 7\n", 584 sc->sc_dv.dv_xname, id, chip); 585 id = 7; 586 } 587 588 if (fast) 589 printf("%s: fast mode set for chip %d\n", 590 sc->sc_dv.dv_xname, chip); 591 592 *idp = id; 593 *fastp = fast; 594 } 595