1 /* $NetBSD: tcds.c,v 1.2 2001/08/22 05:00:27 nisimura 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> /* RCS ID & Copyright macro defns */ 68 69 __KERNEL_RCSID(0, "$NetBSD: tcds.c,v 1.2 2001/08/22 05:00:27 nisimura Exp $"); 70 71 #include <sys/param.h> 72 #include <sys/kernel.h> 73 #include <sys/systm.h> 74 #include <sys/device.h> 75 #include <sys/malloc.h> 76 77 #ifdef __alpha__ 78 #include <machine/rpb.h> 79 #endif /* __alpha__ */ 80 81 #include <dev/scsipi/scsi_all.h> 82 #include <dev/scsipi/scsipi_all.h> 83 #include <dev/scsipi/scsiconf.h> 84 85 #include <dev/ic/ncr53c9xvar.h> 86 87 #include <machine/bus.h> 88 89 #include <dev/tc/tcvar.h> 90 #include <dev/tc/tcdsreg.h> 91 #include <dev/tc/tcdsvar.h> 92 93 #include "locators.h" 94 95 struct tcds_softc { 96 struct device sc_dv; 97 bus_space_tag_t sc_bst; 98 bus_space_handle_t sc_bsh; 99 bus_dma_tag_t sc_dmat; 100 void *sc_cookie; 101 int sc_flags; 102 struct tcds_slotconfig sc_slots[2]; 103 }; 104 105 /* sc_flags */ 106 #define TCDSF_BASEBOARD 0x01 /* baseboard on DEC 3000 */ 107 #define TCDSF_FASTSCSI 0x02 /* supports Fast SCSI */ 108 109 /* Definition of the driver for autoconfig. */ 110 int tcdsmatch __P((struct device *, struct cfdata *, void *)); 111 void tcdsattach __P((struct device *, struct device *, void *)); 112 int tcdsprint __P((void *, const char *)); 113 int tcdssubmatch __P((struct device *, struct cfdata *, void *)); 114 115 struct cfattach tcds_ca = { 116 sizeof(struct tcds_softc), tcdsmatch, tcdsattach, 117 }; 118 119 /*static*/ int tcds_intr __P((void *)); 120 /*static*/ int tcds_intrnull __P((void *)); 121 122 struct tcds_device { 123 const char *td_name; 124 int td_flags; 125 } tcds_devices[] = { 126 #ifdef __alpha__ 127 { "PMAZ-DS ", TCDSF_BASEBOARD }, 128 { "PMAZ-FS ", TCDSF_BASEBOARD|TCDSF_FASTSCSI }, 129 #endif /* __alpha__ */ 130 { "PMAZB-AA", 0 }, 131 { "PMAZC-AA", TCDSF_FASTSCSI }, 132 { NULL, 0 }, 133 }; 134 135 struct tcds_device *tcds_lookup __P((const char *)); 136 void tcds_params __P((struct tcds_softc *, int, int *, int *)); 137 138 struct tcds_device * 139 tcds_lookup(modname) 140 const char *modname; 141 { 142 struct tcds_device *td; 143 144 for (td = tcds_devices; td->td_name != NULL; td++) 145 if (strncmp(td->td_name, modname, TC_ROM_LLEN) == 0) 146 return (td); 147 148 return (NULL); 149 } 150 151 int 152 tcdsmatch(parent, cfdata, aux) 153 struct device *parent; 154 struct cfdata *cfdata; 155 void *aux; 156 { 157 struct tc_attach_args *ta = aux; 158 159 return (tcds_lookup(ta->ta_modname) != NULL); 160 } 161 162 void 163 tcdsattach(parent, self, aux) 164 struct device *parent, *self; 165 void *aux; 166 { 167 struct tcds_softc *sc = (struct tcds_softc *)self; 168 struct tc_attach_args *ta = aux; 169 struct tcdsdev_attach_args tcdsdev; 170 struct tcds_slotconfig *slotc; 171 struct tcds_device *td; 172 bus_space_handle_t sbsh[2]; 173 int i, gpi2; 174 const struct evcnt *pevcnt; 175 176 td = tcds_lookup(ta->ta_modname); 177 if (td == NULL) 178 panic("\ntcdsattach: impossible"); 179 180 printf(": TurboChannel Dual SCSI"); 181 if (td->td_flags & TCDSF_BASEBOARD) 182 printf(" (baseboard)"); 183 printf("\n"); 184 185 sc->sc_flags = td->td_flags; 186 187 sc->sc_bst = ta->ta_memt; 188 sc->sc_dmat = ta->ta_dmat; 189 190 /* 191 * Map the device. 192 */ 193 if (bus_space_map(sc->sc_bst, ta->ta_addr, 194 (TCDS_SCSI1_OFFSET + 0x100), 0, &sc->sc_bsh)) { 195 printf("%s: unable to map device\n", sc->sc_dv.dv_xname); 196 return; 197 } 198 199 /* 200 * Now, slice off two subregions for the individual NCR SCSI chips. 201 */ 202 if (bus_space_subregion(sc->sc_bst, sc->sc_bsh, TCDS_SCSI0_OFFSET, 203 0x100, &sbsh[0]) || 204 bus_space_subregion(sc->sc_bst, sc->sc_bsh, TCDS_SCSI1_OFFSET, 205 0x100, &sbsh[1])) { 206 printf("%s: unable to subregion SCSI chip space\n", 207 sc->sc_dv.dv_xname); 208 return; 209 } 210 211 sc->sc_cookie = ta->ta_cookie; 212 213 pevcnt = tc_intr_evcnt(parent, sc->sc_cookie); 214 tc_intr_establish(parent, sc->sc_cookie, TC_IPL_BIO, tcds_intr, sc); 215 216 /* 217 * XXX 218 * IMER apparently has some random (or, not so random, but still 219 * not useful) bits set in it when the system boots. Clear it. 220 */ 221 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER, 0); 222 223 /* XXX Initial contents of CIR? */ 224 225 /* 226 * Remember if GPI2 is set in the CIR; we'll need it later. 227 */ 228 gpi2 = (bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR) & 229 TCDS_CIR_GPI_2) != 0; 230 231 /* 232 * Set up the per-slot defintions for later use. 233 */ 234 235 /* fill in common information first */ 236 for (i = 0; i < 2; i++) { 237 char *cp; 238 239 slotc = &sc->sc_slots[i]; 240 bzero(slotc, sizeof *slotc); /* clear everything */ 241 242 cp = slotc->sc_name; 243 snprintf(cp, sizeof(slotc->sc_name), "chip %d", i); 244 evcnt_attach_dynamic(&slotc->sc_evcnt, EVCNT_TYPE_INTR, 245 pevcnt, sc->sc_dv.dv_xname, cp); 246 247 slotc->sc_slot = i; 248 slotc->sc_bst = sc->sc_bst; 249 slotc->sc_bsh = sc->sc_bsh; 250 slotc->sc_intrhand = tcds_intrnull; 251 slotc->sc_intrarg = (void *)(long)i; 252 } 253 254 /* information for slot 0 */ 255 slotc = &sc->sc_slots[0]; 256 slotc->sc_resetbits = TCDS_CIR_SCSI0_RESET; 257 slotc->sc_intrmaskbits = 258 TCDS_IMER_SCSI0_MASK | TCDS_IMER_SCSI0_ENB; 259 slotc->sc_intrbits = TCDS_CIR_SCSI0_INT; 260 slotc->sc_dmabits = TCDS_CIR_SCSI0_DMAENA; 261 slotc->sc_errorbits = 0; /* XXX */ 262 slotc->sc_sda = TCDS_SCSI0_DMA_ADDR; 263 slotc->sc_dic = TCDS_SCSI0_DMA_INTR; 264 slotc->sc_dud0 = TCDS_SCSI0_DMA_DUD0; 265 slotc->sc_dud1 = TCDS_SCSI0_DMA_DUD1; 266 267 /* information for slot 1 */ 268 slotc = &sc->sc_slots[1]; 269 slotc->sc_resetbits = TCDS_CIR_SCSI1_RESET; 270 slotc->sc_intrmaskbits = 271 TCDS_IMER_SCSI1_MASK | TCDS_IMER_SCSI1_ENB; 272 slotc->sc_intrbits = TCDS_CIR_SCSI1_INT; 273 slotc->sc_dmabits = TCDS_CIR_SCSI1_DMAENA; 274 slotc->sc_errorbits = 0; /* XXX */ 275 slotc->sc_sda = TCDS_SCSI1_DMA_ADDR; 276 slotc->sc_dic = TCDS_SCSI1_DMA_INTR; 277 slotc->sc_dud0 = TCDS_SCSI1_DMA_DUD0; 278 slotc->sc_dud1 = TCDS_SCSI1_DMA_DUD1; 279 280 /* find the hardware attached to the TCDS ASIC */ 281 for (i = 0; i < 2; i++) { 282 tcds_params(sc, i, &tcdsdev.tcdsda_id, 283 &tcdsdev.tcdsda_fast); 284 285 tcdsdev.tcdsda_bst = sc->sc_bst; 286 tcdsdev.tcdsda_bsh = sbsh[i]; 287 tcdsdev.tcdsda_dmat = sc->sc_dmat; 288 tcdsdev.tcdsda_chip = i; 289 tcdsdev.tcdsda_sc = &sc->sc_slots[i]; 290 /* 291 * Determine the chip frequency. TCDSF_FASTSCSI will be set 292 * for TC option cards. For baseboard chips, GPI2 is set, for a 293 * 25MHz clock, else a 40MHz clock. 294 */ 295 if ((sc->sc_flags & TCDSF_BASEBOARD && gpi2 == 0) || 296 sc->sc_flags & TCDSF_FASTSCSI) { 297 tcdsdev.tcdsda_freq = 40000000; 298 tcdsdev.tcdsda_period = tcdsdev.tcdsda_fast ? 4 : 8; 299 } else { 300 tcdsdev.tcdsda_freq = 25000000; 301 tcdsdev.tcdsda_period = 5; 302 } 303 if (sc->sc_flags & TCDSF_BASEBOARD) 304 tcdsdev.tcdsda_variant = NCR_VARIANT_NCR53C94; 305 else 306 tcdsdev.tcdsda_variant = NCR_VARIANT_NCR53C96; 307 308 tcds_scsi_reset(tcdsdev.tcdsda_sc); 309 310 config_found_sm(self, &tcdsdev, tcdsprint, tcdssubmatch); 311 #ifdef __alpha__ 312 /* 313 * The second SCSI chip isn't present on the baseboard TCDS 314 * on the DEC Alpha 3000/300 series. 315 */ 316 if (sc->sc_flags & TCDSF_BASEBOARD && 317 cputype == ST_DEC_3000_300) 318 break; 319 #endif /* __alpha__ */ 320 } 321 } 322 323 int 324 tcdssubmatch(parent, cf, aux) 325 struct device *parent; 326 struct cfdata *cf; 327 void *aux; 328 { 329 struct tcdsdev_attach_args *tcdsdev = aux; 330 331 if (cf->cf_loc[TCDSCF_CHIP] != TCDSCF_CHIP_DEFAULT && 332 cf->cf_loc[TCDSCF_CHIP] != tcdsdev->tcdsda_chip) 333 return (0); 334 335 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 336 } 337 338 int 339 tcdsprint(aux, pnp) 340 void *aux; 341 const char *pnp; 342 { 343 struct tcdsdev_attach_args *tcdsdev = aux; 344 345 /* Only ASCs can attach to TCDSs; easy. */ 346 if (pnp) 347 printf("asc at %s", pnp); 348 349 printf(" chip %d", tcdsdev->tcdsda_chip); 350 351 return (UNCONF); 352 } 353 354 void 355 tcds_intr_establish(tcds, slot, func, arg) 356 struct device *tcds; 357 int slot; 358 int (*func) __P((void *)); 359 void *arg; 360 { 361 struct tcds_softc *sc = (struct tcds_softc *)tcds; 362 363 if (sc->sc_slots[slot].sc_intrhand != tcds_intrnull) 364 panic("tcds_intr_establish: chip %d twice", slot); 365 366 sc->sc_slots[slot].sc_intrhand = func; 367 sc->sc_slots[slot].sc_intrarg = arg; 368 tcds_scsi_reset(&sc->sc_slots[slot]); 369 } 370 371 void 372 tcds_intr_disestablish(tcds, slot) 373 struct device *tcds; 374 int slot; 375 { 376 struct tcds_softc *sc = (struct tcds_softc *)tcds; 377 378 if (sc->sc_slots[slot].sc_intrhand == tcds_intrnull) 379 panic("tcds_intr_disestablish: chip %d missing intr", 380 slot); 381 382 sc->sc_slots[slot].sc_intrhand = tcds_intrnull; 383 sc->sc_slots[slot].sc_intrarg = (void *)(u_long)slot; 384 385 tcds_dma_enable(&sc->sc_slots[slot], 0); 386 tcds_scsi_enable(&sc->sc_slots[slot], 0); 387 } 388 389 int 390 tcds_intrnull(val) 391 void *val; 392 { 393 394 panic("tcds_intrnull: uncaught TCDS intr for chip %lu\n", 395 (u_long)val); 396 } 397 398 void 399 tcds_scsi_reset(sc) 400 struct tcds_slotconfig *sc; 401 { 402 u_int32_t cir; 403 404 tcds_dma_enable(sc, 0); 405 tcds_scsi_enable(sc, 0); 406 407 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 408 TCDS_CIR_CLR(cir, sc->sc_resetbits); 409 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 410 411 DELAY(1); 412 413 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 414 TCDS_CIR_SET(cir, sc->sc_resetbits); 415 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 416 417 tcds_scsi_enable(sc, 1); 418 tcds_dma_enable(sc, 1); 419 } 420 421 void 422 tcds_scsi_enable(sc, on) 423 struct tcds_slotconfig *sc; 424 int on; 425 { 426 u_int32_t imer; 427 428 imer = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER); 429 430 if (on) 431 imer |= sc->sc_intrmaskbits; 432 else 433 imer &= ~sc->sc_intrmaskbits; 434 435 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER, imer); 436 } 437 438 void 439 tcds_dma_enable(sc, on) 440 struct tcds_slotconfig *sc; 441 int on; 442 { 443 u_int32_t cir; 444 445 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 446 447 /* XXX Clear/set IOSLOT/PBS bits. */ 448 if (on) 449 TCDS_CIR_SET(cir, sc->sc_dmabits); 450 else 451 TCDS_CIR_CLR(cir, sc->sc_dmabits); 452 453 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 454 } 455 456 int 457 tcds_scsi_isintr(sc, clear) 458 struct tcds_slotconfig *sc; 459 int clear; 460 { 461 u_int32_t cir; 462 463 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 464 465 if ((cir & sc->sc_intrbits) != 0) { 466 if (clear) { 467 TCDS_CIR_CLR(cir, sc->sc_intrbits); 468 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, 469 cir); 470 } 471 return (1); 472 } else 473 return (0); 474 } 475 476 int 477 tcds_scsi_iserr(sc) 478 struct tcds_slotconfig *sc; 479 { 480 u_int32_t cir; 481 482 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 483 return ((cir & sc->sc_errorbits) != 0); 484 } 485 486 int 487 tcds_intr(arg) 488 void *arg; 489 { 490 struct tcds_softc *sc = arg; 491 u_int32_t ir, ir0; 492 493 /* 494 * XXX 495 * Copy and clear (gag!) the interrupts. 496 */ 497 ir = ir0 = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 498 TCDS_CIR_CLR(ir0, TCDS_CIR_ALLINTR); 499 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, ir0); 500 tc_syncbus(); 501 502 #define INCRINTRCNT(slot) sc->sc_slots[slot].sc_evcnt.ev_count++ 503 504 #define CHECKINTR(slot) \ 505 if (ir & sc->sc_slots[slot].sc_intrbits) { \ 506 INCRINTRCNT(slot); \ 507 (void)(*sc->sc_slots[slot].sc_intrhand) \ 508 (sc->sc_slots[slot].sc_intrarg); \ 509 } 510 CHECKINTR(0); 511 CHECKINTR(1); 512 #undef CHECKINTR 513 514 #ifdef DIAGNOSTIC 515 /* 516 * Interrupts not currently handled, but would like to know if they 517 * occur. 518 * 519 * XXX 520 * Don't know if we have to set the interrupt mask and enable bits 521 * in the IMER to allow some of them to happen? 522 */ 523 #define PRINTINTR(msg, bits) \ 524 if (ir & bits) \ 525 printf("%s: %s", sc->sc_dv.dv_xname, msg); 526 PRINTINTR("SCSI0 DREQ interrupt.\n", TCDS_CIR_SCSI0_DREQ); 527 PRINTINTR("SCSI1 DREQ interrupt.\n", TCDS_CIR_SCSI1_DREQ); 528 PRINTINTR("SCSI0 prefetch interrupt.\n", TCDS_CIR_SCSI0_PREFETCH); 529 PRINTINTR("SCSI1 prefetch interrupt.\n", TCDS_CIR_SCSI1_PREFETCH); 530 PRINTINTR("SCSI0 DMA error.\n", TCDS_CIR_SCSI0_DMA); 531 PRINTINTR("SCSI1 DMA error.\n", TCDS_CIR_SCSI1_DMA); 532 PRINTINTR("SCSI0 DB parity error.\n", TCDS_CIR_SCSI0_DB); 533 PRINTINTR("SCSI1 DB parity error.\n", TCDS_CIR_SCSI1_DB); 534 PRINTINTR("SCSI0 DMA buffer parity error.\n", TCDS_CIR_SCSI0_DMAB_PAR); 535 PRINTINTR("SCSI1 DMA buffer parity error.\n", TCDS_CIR_SCSI1_DMAB_PAR); 536 PRINTINTR("SCSI0 DMA read parity error.\n", TCDS_CIR_SCSI0_DMAR_PAR); 537 PRINTINTR("SCSI1 DMA read parity error.\n", TCDS_CIR_SCSI1_DMAR_PAR); 538 PRINTINTR("TC write parity error.\n", TCDS_CIR_TCIOW_PAR); 539 PRINTINTR("TC I/O address parity error.\n", TCDS_CIR_TCIOA_PAR); 540 #undef PRINTINTR 541 #endif 542 543 /* 544 * XXX 545 * The MACH source had this, with the comment: 546 * This is wrong, but machine keeps dying. 547 */ 548 DELAY(1); 549 550 return (1); 551 } 552 553 void 554 tcds_params(sc, chip, idp, fastp) 555 struct tcds_softc *sc; 556 int chip, *idp, *fastp; 557 { 558 int id, fast; 559 u_int32_t ids; 560 561 #ifdef __alpha__ 562 if (sc->sc_flags & TCDSF_BASEBOARD) { 563 extern u_int8_t dec_3000_scsiid[], dec_3000_scsifast[]; 564 565 id = dec_3000_scsiid[chip]; 566 fast = dec_3000_scsifast[chip]; 567 } else 568 #endif /* __alpha__ */ 569 { 570 /* 571 * SCSI IDs are stored in the EEPROM, along with whether or 572 * not the device is "fast". Chip 0 is the high nibble, 573 * chip 1 the low nibble. 574 */ 575 ids = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_EEPROM_IDS); 576 if (chip == 0) 577 ids >>= 4; 578 579 id = ids & 0x7; 580 fast = ids & 0x8; 581 } 582 583 if (id < 0 || id > 7) { 584 printf("%s: WARNING: bad SCSI ID %d for chip %d, using 7\n", 585 sc->sc_dv.dv_xname, id, chip); 586 id = 7; 587 } 588 589 if (fast) 590 printf("%s: fast mode set for chip %d\n", 591 sc->sc_dv.dv_xname, chip); 592 593 *idp = id; 594 *fastp = fast; 595 } 596