tcds.c revision 1.21
1 /* $NetBSD: tcds.c,v 1.21 2008/04/05 16:44:41 cegger 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 (at) 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 1.21 2008/04/05 16:44:41 cegger 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 <sys/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 static int tcdsmatch(struct device *, struct cfdata *, void *); 110 static void tcdsattach(struct device *, struct device *, void *); 111 static int tcdsprint(void *, const char *); 112 113 CFATTACH_DECL(tcds, sizeof(struct tcds_softc), 114 tcdsmatch, tcdsattach, NULL, NULL); 115 116 /*static*/ int tcds_intr(void *); 117 /*static*/ int tcds_intrnull(void *); 118 119 static const struct tcds_device { 120 const char *td_name; 121 int td_flags; 122 } tcds_devices[] = { 123 #ifdef __alpha__ 124 { "PMAZ-DS ", TCDSF_BASEBOARD }, 125 { "PMAZ-FS ", TCDSF_BASEBOARD|TCDSF_FASTSCSI }, 126 #endif /* __alpha__ */ 127 { "PMAZB-AA", 0 }, 128 { "PMAZC-AA", TCDSF_FASTSCSI }, 129 { NULL, 0 }, 130 }; 131 132 static void tcds_params(struct tcds_softc *, int, int *, int *); 133 134 static const struct tcds_device * 135 tcds_lookup(const char *modname) 136 { 137 const struct tcds_device *td; 138 139 for (td = tcds_devices; td->td_name != NULL; td++) 140 if (strncmp(td->td_name, modname, TC_ROM_LLEN) == 0) 141 return (td); 142 143 return (NULL); 144 } 145 146 static int 147 tcdsmatch(struct device *parent, struct cfdata *cfdata, void *aux) 148 { 149 struct tc_attach_args *ta = aux; 150 151 return (tcds_lookup(ta->ta_modname) != NULL); 152 } 153 154 static void 155 tcdsattach(struct device *parent, struct device *self, void *aux) 156 { 157 struct tcds_softc *sc = device_private(self); 158 struct tc_attach_args *ta = aux; 159 struct tcdsdev_attach_args tcdsdev; 160 struct tcds_slotconfig *slotc; 161 const struct tcds_device *td; 162 bus_space_handle_t sbsh[2]; 163 int i, gpi2; 164 const struct evcnt *pevcnt; 165 int locs[TCDSCF_NLOCS]; 166 167 td = tcds_lookup(ta->ta_modname); 168 if (td == NULL) 169 panic("\ntcdsattach: impossible"); 170 171 printf(": TurboChannel Dual SCSI"); 172 if (td->td_flags & TCDSF_BASEBOARD) 173 printf(" (baseboard)"); 174 printf("\n"); 175 176 sc->sc_flags = td->td_flags; 177 178 sc->sc_bst = ta->ta_memt; 179 sc->sc_dmat = ta->ta_dmat; 180 181 /* 182 * Map the device. 183 */ 184 if (bus_space_map(sc->sc_bst, ta->ta_addr, 185 (TCDS_SCSI1_OFFSET + 0x100), 0, &sc->sc_bsh)) { 186 aprint_error_dev(&sc->sc_dv, "unable to map device\n"); 187 return; 188 } 189 190 /* 191 * Now, slice off two subregions for the individual NCR SCSI chips. 192 */ 193 if (bus_space_subregion(sc->sc_bst, sc->sc_bsh, TCDS_SCSI0_OFFSET, 194 0x100, &sbsh[0]) || 195 bus_space_subregion(sc->sc_bst, sc->sc_bsh, TCDS_SCSI1_OFFSET, 196 0x100, &sbsh[1])) { 197 aprint_error_dev(&sc->sc_dv, "unable to subregion SCSI chip space\n"); 198 return; 199 } 200 201 sc->sc_cookie = ta->ta_cookie; 202 203 pevcnt = tc_intr_evcnt(parent, sc->sc_cookie); 204 tc_intr_establish(parent, sc->sc_cookie, TC_IPL_BIO, tcds_intr, sc); 205 206 /* 207 * XXX 208 * IMER apparently has some random (or, not so random, but still 209 * not useful) bits set in it when the system boots. Clear it. 210 */ 211 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER, 0); 212 213 /* XXX Initial contents of CIR? */ 214 215 /* 216 * Remember if GPI2 is set in the CIR; we'll need it later. 217 */ 218 gpi2 = (bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR) & 219 TCDS_CIR_GPI_2) != 0; 220 221 /* 222 * Set up the per-slot definitions for later use. 223 */ 224 225 /* fill in common information first */ 226 for (i = 0; i < 2; i++) { 227 char *cp; 228 229 slotc = &sc->sc_slots[i]; 230 bzero(slotc, sizeof *slotc); /* clear everything */ 231 232 cp = slotc->sc_name; 233 snprintf(cp, sizeof(slotc->sc_name), "chip %d", i); 234 evcnt_attach_dynamic(&slotc->sc_evcnt, EVCNT_TYPE_INTR, 235 pevcnt, device_xname(&sc->sc_dv), cp); 236 237 slotc->sc_slot = i; 238 slotc->sc_bst = sc->sc_bst; 239 slotc->sc_bsh = sc->sc_bsh; 240 slotc->sc_intrhand = tcds_intrnull; 241 slotc->sc_intrarg = (void *)(long)i; 242 } 243 244 /* information for slot 0 */ 245 slotc = &sc->sc_slots[0]; 246 slotc->sc_resetbits = TCDS_CIR_SCSI0_RESET; 247 slotc->sc_intrmaskbits = 248 TCDS_IMER_SCSI0_MASK | TCDS_IMER_SCSI0_ENB; 249 slotc->sc_intrbits = TCDS_CIR_SCSI0_INT; 250 slotc->sc_dmabits = TCDS_CIR_SCSI0_DMAENA; 251 slotc->sc_errorbits = 0; /* XXX */ 252 slotc->sc_sda = TCDS_SCSI0_DMA_ADDR; 253 slotc->sc_dic = TCDS_SCSI0_DMA_INTR; 254 slotc->sc_dud0 = TCDS_SCSI0_DMA_DUD0; 255 slotc->sc_dud1 = TCDS_SCSI0_DMA_DUD1; 256 257 /* information for slot 1 */ 258 slotc = &sc->sc_slots[1]; 259 slotc->sc_resetbits = TCDS_CIR_SCSI1_RESET; 260 slotc->sc_intrmaskbits = 261 TCDS_IMER_SCSI1_MASK | TCDS_IMER_SCSI1_ENB; 262 slotc->sc_intrbits = TCDS_CIR_SCSI1_INT; 263 slotc->sc_dmabits = TCDS_CIR_SCSI1_DMAENA; 264 slotc->sc_errorbits = 0; /* XXX */ 265 slotc->sc_sda = TCDS_SCSI1_DMA_ADDR; 266 slotc->sc_dic = TCDS_SCSI1_DMA_INTR; 267 slotc->sc_dud0 = TCDS_SCSI1_DMA_DUD0; 268 slotc->sc_dud1 = TCDS_SCSI1_DMA_DUD1; 269 270 /* find the hardware attached to the TCDS ASIC */ 271 for (i = 0; i < 2; i++) { 272 tcds_params(sc, i, &tcdsdev.tcdsda_id, 273 &tcdsdev.tcdsda_fast); 274 275 tcdsdev.tcdsda_bst = sc->sc_bst; 276 tcdsdev.tcdsda_bsh = sbsh[i]; 277 tcdsdev.tcdsda_dmat = sc->sc_dmat; 278 tcdsdev.tcdsda_chip = i; 279 tcdsdev.tcdsda_sc = &sc->sc_slots[i]; 280 /* 281 * Determine the chip frequency. TCDSF_FASTSCSI will be set 282 * for TC option cards. For baseboard chips, GPI2 is set, for a 283 * 25MHz clock, else a 40MHz clock. 284 */ 285 if ((sc->sc_flags & TCDSF_BASEBOARD && gpi2 == 0) || 286 sc->sc_flags & TCDSF_FASTSCSI) { 287 tcdsdev.tcdsda_freq = 40000000; 288 tcdsdev.tcdsda_period = tcdsdev.tcdsda_fast ? 4 : 8; 289 } else { 290 tcdsdev.tcdsda_freq = 25000000; 291 tcdsdev.tcdsda_period = 5; 292 } 293 if (sc->sc_flags & TCDSF_BASEBOARD) 294 tcdsdev.tcdsda_variant = NCR_VARIANT_NCR53C94; 295 else 296 tcdsdev.tcdsda_variant = NCR_VARIANT_NCR53C96; 297 298 tcds_scsi_reset(tcdsdev.tcdsda_sc); 299 300 locs[TCDSCF_CHIP] = i; 301 302 config_found_sm_loc(self, "tcds", locs, &tcdsdev, 303 tcdsprint, config_stdsubmatch); 304 #ifdef __alpha__ 305 /* 306 * The second SCSI chip isn't present on the baseboard TCDS 307 * on the DEC Alpha 3000/300 series. 308 */ 309 if (sc->sc_flags & TCDSF_BASEBOARD && 310 cputype == ST_DEC_3000_300) 311 break; 312 #endif /* __alpha__ */ 313 } 314 } 315 316 static int 317 tcdsprint(void *aux, const char *pnp) 318 { 319 struct tcdsdev_attach_args *tcdsdev = aux; 320 321 /* Only ASCs can attach to TCDSs; easy. */ 322 if (pnp) 323 aprint_normal("asc at %s", pnp); 324 325 aprint_normal(" chip %d", tcdsdev->tcdsda_chip); 326 327 return (UNCONF); 328 } 329 330 void 331 tcds_intr_establish(struct device *tcds, int slot, int (*func)(void *), 332 void *arg) 333 { 334 struct tcds_softc *sc = device_private(tcds); 335 336 if (sc->sc_slots[slot].sc_intrhand != tcds_intrnull) 337 panic("tcds_intr_establish: chip %d twice", slot); 338 339 sc->sc_slots[slot].sc_intrhand = func; 340 sc->sc_slots[slot].sc_intrarg = arg; 341 tcds_scsi_reset(&sc->sc_slots[slot]); 342 } 343 344 void 345 tcds_intr_disestablish(struct device *tcds, int slot) 346 { 347 struct tcds_softc *sc = device_private(tcds); 348 349 if (sc->sc_slots[slot].sc_intrhand == tcds_intrnull) 350 panic("tcds_intr_disestablish: chip %d missing intr", 351 slot); 352 353 sc->sc_slots[slot].sc_intrhand = tcds_intrnull; 354 sc->sc_slots[slot].sc_intrarg = (void *)(u_long)slot; 355 356 tcds_dma_enable(&sc->sc_slots[slot], 0); 357 tcds_scsi_enable(&sc->sc_slots[slot], 0); 358 } 359 360 int 361 tcds_intrnull(void *val) 362 { 363 364 panic("tcds_intrnull: uncaught TCDS intr for chip %lu", 365 (u_long)val); 366 } 367 368 void 369 tcds_scsi_reset(struct tcds_slotconfig *sc) 370 { 371 u_int32_t cir; 372 373 tcds_dma_enable(sc, 0); 374 tcds_scsi_enable(sc, 0); 375 376 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 377 TCDS_CIR_CLR(cir, sc->sc_resetbits); 378 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 379 380 DELAY(1); 381 382 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 383 TCDS_CIR_SET(cir, sc->sc_resetbits); 384 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 385 386 tcds_scsi_enable(sc, 1); 387 tcds_dma_enable(sc, 1); 388 } 389 390 void 391 tcds_scsi_enable(struct tcds_slotconfig *sc, int on) 392 { 393 u_int32_t imer; 394 395 imer = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER); 396 397 if (on) 398 imer |= sc->sc_intrmaskbits; 399 else 400 imer &= ~sc->sc_intrmaskbits; 401 402 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_IMER, imer); 403 } 404 405 void 406 tcds_dma_enable(struct tcds_slotconfig *sc, int on) 407 { 408 u_int32_t cir; 409 410 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 411 412 /* XXX Clear/set IOSLOT/PBS bits. */ 413 if (on) 414 TCDS_CIR_SET(cir, sc->sc_dmabits); 415 else 416 TCDS_CIR_CLR(cir, sc->sc_dmabits); 417 418 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, cir); 419 } 420 421 int 422 tcds_scsi_isintr(struct tcds_slotconfig *sc, int clear) 423 { 424 u_int32_t cir; 425 426 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 427 428 if ((cir & sc->sc_intrbits) != 0) { 429 if (clear) { 430 TCDS_CIR_CLR(cir, sc->sc_intrbits); 431 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, 432 cir); 433 } 434 return (1); 435 } else 436 return (0); 437 } 438 439 int 440 tcds_scsi_iserr(struct tcds_slotconfig *sc) 441 { 442 u_int32_t cir; 443 444 cir = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 445 return ((cir & sc->sc_errorbits) != 0); 446 } 447 448 int 449 tcds_intr(void *arg) 450 { 451 struct tcds_softc *sc = arg; 452 u_int32_t ir, ir0; 453 454 /* 455 * XXX 456 * Copy and clear (gag!) the interrupts. 457 */ 458 ir = ir0 = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR); 459 TCDS_CIR_CLR(ir0, TCDS_CIR_ALLINTR); 460 bus_space_write_4(sc->sc_bst, sc->sc_bsh, TCDS_CIR, ir0); 461 tc_syncbus(); 462 463 #define INCRINTRCNT(slot) sc->sc_slots[slot].sc_evcnt.ev_count++ 464 465 #define CHECKINTR(slot) \ 466 if (ir & sc->sc_slots[slot].sc_intrbits) { \ 467 INCRINTRCNT(slot); \ 468 (void)(*sc->sc_slots[slot].sc_intrhand) \ 469 (sc->sc_slots[slot].sc_intrarg); \ 470 } 471 CHECKINTR(0); 472 CHECKINTR(1); 473 #undef CHECKINTR 474 475 #ifdef DIAGNOSTIC 476 /* 477 * Interrupts not currently handled, but would like to know if they 478 * occur. 479 * 480 * XXX 481 * Don't know if we have to set the interrupt mask and enable bits 482 * in the IMER to allow some of them to happen? 483 */ 484 #define PRINTINTR(msg, bits) \ 485 if (ir & bits) \ 486 printf("%s: %s", device_xname(&sc->sc_dv), msg); 487 PRINTINTR("SCSI0 DREQ interrupt.\n", TCDS_CIR_SCSI0_DREQ); 488 PRINTINTR("SCSI1 DREQ interrupt.\n", TCDS_CIR_SCSI1_DREQ); 489 PRINTINTR("SCSI0 prefetch interrupt.\n", TCDS_CIR_SCSI0_PREFETCH); 490 PRINTINTR("SCSI1 prefetch interrupt.\n", TCDS_CIR_SCSI1_PREFETCH); 491 PRINTINTR("SCSI0 DMA error.\n", TCDS_CIR_SCSI0_DMA); 492 PRINTINTR("SCSI1 DMA error.\n", TCDS_CIR_SCSI1_DMA); 493 PRINTINTR("SCSI0 DB parity error.\n", TCDS_CIR_SCSI0_DB); 494 PRINTINTR("SCSI1 DB parity error.\n", TCDS_CIR_SCSI1_DB); 495 PRINTINTR("SCSI0 DMA buffer parity error.\n", TCDS_CIR_SCSI0_DMAB_PAR); 496 PRINTINTR("SCSI1 DMA buffer parity error.\n", TCDS_CIR_SCSI1_DMAB_PAR); 497 PRINTINTR("SCSI0 DMA read parity error.\n", TCDS_CIR_SCSI0_DMAR_PAR); 498 PRINTINTR("SCSI1 DMA read parity error.\n", TCDS_CIR_SCSI1_DMAR_PAR); 499 PRINTINTR("TC write parity error.\n", TCDS_CIR_TCIOW_PAR); 500 PRINTINTR("TC I/O address parity error.\n", TCDS_CIR_TCIOA_PAR); 501 #undef PRINTINTR 502 #endif 503 504 /* 505 * XXX 506 * The MACH source had this, with the comment: 507 * This is wrong, but machine keeps dying. 508 */ 509 DELAY(1); 510 511 return (1); 512 } 513 514 static void 515 tcds_params(struct tcds_softc *sc, int chip, int *idp, int *fastp) 516 { 517 int id, fast; 518 u_int32_t ids; 519 520 #ifdef __alpha__ 521 if (sc->sc_flags & TCDSF_BASEBOARD) { 522 extern u_int8_t dec_3000_scsiid[], dec_3000_scsifast[]; 523 524 id = dec_3000_scsiid[chip]; 525 fast = dec_3000_scsifast[chip]; 526 } else 527 #endif /* __alpha__ */ 528 { 529 /* 530 * SCSI IDs are stored in the EEPROM, along with whether or 531 * not the device is "fast". Chip 0 is the high nibble, 532 * chip 1 the low nibble. 533 */ 534 ids = bus_space_read_4(sc->sc_bst, sc->sc_bsh, TCDS_EEPROM_IDS); 535 if (chip == 0) 536 ids >>= 4; 537 538 id = ids & 0x7; 539 fast = ids & 0x8; 540 } 541 542 if (id < 0 || id > 7) { 543 printf("%s: WARNING: bad SCSI ID %d for chip %d, using 7\n", 544 device_xname(&sc->sc_dv), id, chip); 545 id = 7; 546 } 547 548 if (fast) 549 printf("%s: fast mode set for chip %d\n", 550 device_xname(&sc->sc_dv), chip); 551 552 *idp = id; 553 *fastp = fast; 554 } 555
Indexes created Fri Oct 03 02:09:57 GMT 2025