ahc_isa.c revision 1.34
1 /* $NetBSD: ahc_isa.c,v 1.34 2008/04/04 22:11:06 cegger Exp $ */ 2 3 /* 4 * Product specific probe and attach routines for: 5 * AHA-284X VL-bus SCSI controllers 6 * 7 * Copyright (c) 1994, 1995, 1996, 1997, 1998 Justin T. Gibbs. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice immediately at the beginning of the file, without modification, 15 * this list of conditions, and the following disclaimer. 16 * 2. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: src/sys/dev/aic7xxx/ahc_eisa.c,v 1.15 2000/01/29 14:22:19 peter Exp $ 32 */ 33 34 /*- 35 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 36 * All rights reserved. 37 * 38 * This code is derived from software contributed to The NetBSD Foundation 39 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 40 * NASA Ames Research Center. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the NetBSD 53 * Foundation, Inc. and its contributors. 54 * 4. Neither the name of The NetBSD Foundation nor the names of its 55 * contributors may be used to endorse or promote products derived 56 * from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 68 * POSSIBILITY OF SUCH DAMAGE. 69 */ 70 71 /* 72 * Copyright (c) 1995, 1996 Christopher G. Demetriou 73 * All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by Christopher G. Demetriou 86 * for the NetBSD Project. 87 * 4. The name of the author may not be used to endorse or promote products 88 * derived from this software without specific prior written permission 89 * 90 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 91 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 92 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 93 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 94 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 95 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 96 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 97 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 98 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 99 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 100 */ 101 102 /* 103 * This front-end driver is really sort of a hack. The AHA-284X likes 104 * to masquerade as an EISA device. However, on VLbus machines with 105 * no EISA signature in the BIOS, the EISA bus will never be scanned. 106 * This is intended to catch the 284X controllers on those systems 107 * by looking in "EISA i/o space" for 284X controllers. 108 * 109 * This relies heavily on i/o port accounting. We also just use the 110 * EISA macros for everything ... it's a real waste to redefine them. 111 * 112 * Note: there isn't any #ifdef for FreeBSD in this file, since the 113 * FreeBSD EISA driver handles all cases of the 284X. 114 * 115 * -- Jason R. Thorpe <thorpej (at) NetBSD.org> 116 * July 12, 1996 117 */ 118 119 #include <sys/cdefs.h> 120 __KERNEL_RCSID(0, "$NetBSD: ahc_isa.c,v 1.34 2008/04/04 22:11:06 cegger Exp $"); 121 122 #include <sys/param.h> 123 #include <sys/systm.h> 124 #include <sys/kernel.h> 125 #include <sys/device.h> 126 #include <sys/queue.h> 127 #include <sys/malloc.h> 128 #include <sys/reboot.h> 129 130 #include <machine/bus.h> 131 #include <machine/intr.h> 132 133 #include <dev/scsipi/scsi_all.h> 134 #include <dev/scsipi/scsipi_all.h> 135 #include <dev/scsipi/scsiconf.h> 136 137 #include <dev/isa/isavar.h> 138 139 #include <dev/eisa/eisareg.h> 140 #include <dev/eisa/eisavar.h> 141 #include <dev/eisa/eisadevs.h> 142 143 #include <dev/ic/aic7xxx_osm.h> 144 #include <dev/ic/aic7xxx_inline.h> 145 #include <dev/ic/aic77xxreg.h> 146 #include <dev/ic/aic77xxvar.h> 147 #include <dev/ic/smc93cx6var.h> 148 149 /* IO port address setting range as EISA slot number */ 150 #define AHC_ISA_MIN_SLOT 0x1 /* from iobase = 0x1c00 */ 151 #define AHC_ISA_MAX_SLOT 0xe /* to iobase = 0xec00 */ 152 153 #define AHC_ISA_SLOT_OFFSET AHC_EISA_SLOT_OFFSET 154 #define AHC_ISA_IOSIZE AHC_EISA_IOSIZE 155 156 /* 157 * I/O port offsets 158 */ 159 #define AHC_ISA_VID (EISA_SLOTOFF_VID - AHC_ISA_SLOT_OFFSET) 160 #define AHC_ISA_PID (EISA_SLOTOFF_PID - AHC_ISA_SLOT_OFFSET) 161 #define AHC_ISA_PRIMING AHC_ISA_VID /* enable vendor/product ID */ 162 163 /* 164 * AHC_ISA_PRIMING register values (write) 165 */ 166 #define AHC_ISA_PRIMING_VID(index) (AHC_ISA_VID + (index)) 167 #define AHC_ISA_PRIMING_PID(index) (AHC_ISA_PID + (index)) 168 169 int ahc_isa_idstring(bus_space_tag_t, bus_space_handle_t, char *); 170 int ahc_isa_match(struct isa_attach_args *, bus_addr_t); 171 172 int ahc_isa_probe(struct device *, struct cfdata *, void *); 173 void ahc_isa_attach(struct device *, struct device *, void *); 174 void aha2840_load_seeprom(struct ahc_softc *ahc); 175 static int verify_seeprom_cksum(struct seeprom_config *sc); 176 177 CFATTACH_DECL(ahc_isa, sizeof(struct ahc_softc), 178 ahc_isa_probe, ahc_isa_attach, NULL, NULL); 179 180 /* 181 * This keeps track of which slots are to be checked next if the 182 * iobase locator is a wildcard. A simple static variable isn't enough, 183 * since it's conceivable that a system might have more than one ISA 184 * bus. 185 * 186 * The "bus" member is the unit number of the parent ISA bus, e.g. "0" 187 * for "isa0". 188 */ 189 struct ahc_isa_slot { 190 LIST_ENTRY(ahc_isa_slot) link; 191 int bus; 192 int slot; 193 }; 194 static LIST_HEAD(, ahc_isa_slot) ahc_isa_all_slots; 195 static int ahc_isa_slot_initialized; 196 197 int 198 ahc_isa_idstring(bus_space_tag_t iot, bus_space_handle_t ioh, char *idstring) 199 { 200 uint8_t vid[EISA_NVIDREGS], pid[EISA_NPIDREGS]; 201 int i; 202 203 /* Get the vendor ID bytes */ 204 for (i = 0; i < EISA_NVIDREGS; i++) { 205 bus_space_write_1(iot, ioh, AHC_ISA_PRIMING, 206 AHC_ISA_PRIMING_VID(i)); 207 vid[i] = bus_space_read_1(iot, ioh, AHC_ISA_VID + i); 208 } 209 210 /* Check for device existence */ 211 if (EISA_VENDID_NODEV(vid)) { 212 #if 0 213 aprint_error("ahc_isa_idstring: no device at 0x%lx\n", 214 ioh); /* XXX knows about ioh guts */ 215 aprint_error("\t(0x%x, 0x%x)\n", vid[0], vid[1]); 216 #endif 217 return (0); 218 } 219 220 /* And check that the firmware didn't biff something badly */ 221 if (EISA_VENDID_IDDELAY(vid)) { 222 aprint_error("ahc_isa_idstring: BIOS biffed it at 0x%lx\n", 223 ioh); /* XXX knows about ioh guts */ 224 return (0); 225 } 226 227 /* Get the product ID bytes */ 228 for (i = 0; i < EISA_NPIDREGS; i++) { 229 bus_space_write_1(iot, ioh, AHC_ISA_PRIMING, 230 AHC_ISA_PRIMING_PID(i)); 231 pid[i] = bus_space_read_1(iot, ioh, AHC_ISA_PID + i); 232 } 233 234 /* Create the ID string from the vendor and product IDs */ 235 idstring[0] = EISA_VENDID_0(vid); 236 idstring[1] = EISA_VENDID_1(vid); 237 idstring[2] = EISA_VENDID_2(vid); 238 idstring[3] = EISA_PRODID_0(pid); 239 idstring[4] = EISA_PRODID_1(pid); 240 idstring[5] = EISA_PRODID_2(pid); 241 idstring[6] = EISA_PRODID_3(pid); 242 idstring[7] = '\0'; /* sanity */ 243 244 return (1); 245 } 246 247 int 248 ahc_isa_match(struct isa_attach_args *ia, bus_addr_t iobase) 249 { 250 bus_space_tag_t iot = ia->ia_iot; 251 bus_space_handle_t ioh; 252 int irq; 253 char idstring[EISA_IDSTRINGLEN]; 254 255 /* 256 * Get a mapping for the while slot-specific address 257 * space. If we can't, assume nothing's there, but 258 * warn about it. 259 */ 260 if (bus_space_map(iot, iobase, AHC_ISA_IOSIZE, 0, &ioh)) { 261 #if 0 262 /* 263 * Don't print anything out here, since this could 264 * be common on machines configured to look for 265 * ahc_eisa and ahc_isa. 266 */ 267 aprint_error("ahc_isa_match: can't map I/O space for 0x%x\n", 268 iobase); 269 #endif 270 return (0); 271 } 272 273 if (!ahc_isa_idstring(iot, ioh, idstring)) 274 irq = -1; /* cannot get the ID string */ 275 else if (strcmp(idstring, "ADP7756") && 276 strcmp(idstring, "ADP7757")) 277 irq = -1; /* unknown ID strings */ 278 else 279 irq = ahc_aic77xx_irq(iot, ioh); 280 281 bus_space_unmap(iot, ioh, AHC_ISA_IOSIZE); 282 283 if (irq < 0) 284 return (0); 285 286 if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ && 287 ia->ia_irq[0].ir_irq != irq) { 288 aprint_error("ahc_isa_match: irq mismatch (kernel %d, card %d)\n", 289 ia->ia_irq[0].ir_irq, irq); 290 return (0); 291 } 292 293 /* We have a match */ 294 ia->ia_nio = 1; 295 ia->ia_io[0].ir_addr = iobase; 296 ia->ia_io[0].ir_size = AHC_ISA_IOSIZE; 297 298 ia->ia_nirq = 1; 299 ia->ia_irq[0].ir_irq = irq; 300 301 ia->ia_ndrq = 0; 302 ia->ia_niomem = 0; 303 304 return (1); 305 } 306 307 /* 308 * Check the slots looking for a board we recognise 309 * If we find one, note it's address (slot) and call 310 * the actual probe routine to check it out. 311 */ 312 int 313 ahc_isa_probe(struct device *parent, struct cfdata *match, void *aux) 314 { 315 struct isa_attach_args *ia = aux; 316 struct ahc_isa_slot *as; 317 318 if (ahc_isa_slot_initialized == 0) { 319 LIST_INIT(&ahc_isa_all_slots); 320 ahc_isa_slot_initialized = 1; 321 } 322 323 if (ia->ia_nio < 1) 324 return (0); 325 if (ia->ia_nirq < 1) 326 return (0); 327 328 if (ISA_DIRECT_CONFIG(ia)) 329 return (0); 330 331 if (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT) 332 return (ahc_isa_match(ia, ia->ia_io[0].ir_addr)); 333 334 /* 335 * Find this bus's state. If we don't yet have a slot 336 * marker, allocate and initialize one. 337 */ 338 for (as = ahc_isa_all_slots.lh_first; as != NULL; 339 as = as->link.le_next) 340 if (as->bus == device_unit(parent)) 341 goto found_slot_marker; 342 343 /* 344 * Don't have one, so make one. 345 */ 346 as = (struct ahc_isa_slot *) 347 malloc(sizeof(struct ahc_isa_slot), M_DEVBUF, M_NOWAIT); 348 if (as == NULL) 349 panic("ahc_isa_probe: can't allocate slot marker"); 350 351 as->bus = device_unit(parent); 352 as->slot = AHC_ISA_MIN_SLOT; 353 LIST_INSERT_HEAD(&ahc_isa_all_slots, as, link); 354 355 found_slot_marker: 356 357 for (; as->slot <= AHC_ISA_MAX_SLOT; as->slot++) { 358 if (ahc_isa_match(ia, EISA_SLOT_ADDR(as->slot) + 359 AHC_ISA_SLOT_OFFSET)) { 360 as->slot++; /* next slot to search */ 361 return (1); 362 } 363 } 364 365 /* No matching cards were found. */ 366 return (0); 367 } 368 369 void 370 ahc_isa_attach(struct device *parent, struct device *self, void *aux) 371 { 372 struct ahc_softc *ahc = (void *)self; 373 struct isa_attach_args *ia = aux; 374 bus_space_tag_t iot = ia->ia_iot; 375 bus_space_handle_t ioh; 376 int irq, intrtype; 377 const char *intrtypestr; 378 char idstring[EISA_IDSTRINGLEN]; 379 u_char intdef; 380 381 aprint_naive(": SCSI controller\n"); 382 383 if (bus_space_map(iot, ia->ia_io[0].ir_addr, ia->ia_io[0].ir_size, 384 0, &ioh)) { 385 aprint_error(": can't map i/o space\n"); 386 return; 387 } 388 if (!ahc_isa_idstring(iot, ioh, idstring)) { 389 aprint_error(": can't read ID string\n"); 390 goto free_io; 391 } 392 if ((irq = ahc_aic77xx_irq(iot, ioh)) < 0) { 393 aprint_error(": ahc_aic77xx_irq failed\n"); 394 goto free_io; 395 } 396 397 if (strcmp(idstring, "ADP7756") == 0) { 398 aprint_normal(": %s\n", EISA_PRODUCT_ADP7756); 399 } else if (strcmp(idstring, "ADP7757") == 0) { 400 aprint_normal(": %s\n", EISA_PRODUCT_ADP7757); 401 } else { 402 aprint_error(": unknown device type %s\n", idstring); 403 goto free_io; 404 } 405 406 /* 407 * Tell the bus-DMA interface that we can do 32bit DMA 408 * NOTE: this variable is first referenced in ahc_init(). 409 */ 410 ahc->sc_dmaflags = ISABUS_DMA_32BIT; 411 412 ahc_set_name(ahc, device_xname(&ahc->sc_dev)); 413 ahc->parent_dmat = ia->ia_dmat; 414 ahc->channel = 'A'; 415 ahc->chip = AHC_AIC7770|AHC_VL; 416 ahc->features = AHC_AIC7770_FE; 417 ahc->bugs |= AHC_TMODE_WIDEODD_BUG; 418 ahc->flags |= AHC_PAGESCBS; 419 ahc->tag = iot; 420 ahc->bsh = ioh; 421 422 if (ahc_softc_init(ahc) != 0) 423 goto free_io; 424 425 ahc_intr_enable(ahc, false); 426 427 if (ahc_reset(ahc) != 0) 428 goto free_io; 429 430 intdef = bus_space_read_1(iot, ioh, INTDEF); 431 432 if (intdef & EDGE_TRIG) { 433 intrtype = IST_EDGE; 434 intrtypestr = "edge triggered"; 435 } else { 436 intrtype = IST_LEVEL; 437 intrtypestr = "level sensitive"; 438 } 439 ahc->ih = isa_intr_establish(ia->ia_ic, irq, 440 intrtype, IPL_BIO, ahc_intr, ahc); 441 if (ahc->ih == NULL) { 442 aprint_error_dev(&ahc->sc_dev, "couldn't establish %s interrupt\n", 443 intrtypestr); 444 goto free_io; 445 } 446 447 /* 448 * Tell the user what type of interrupts we're using. 449 * usefull for debugging irq problems 450 */ 451 if (bootverbose) { 452 aprint_verbose_dev(&ahc->sc_dev, "Using %s interrupts\n", 453 intrtypestr); 454 } 455 456 /* 457 * Now that we know we own the resources we need, do the 458 * card initialization. 459 */ 460 aha2840_load_seeprom(ahc); 461 462 /* Attach sub-devices */ 463 if (ahc_aic77xx_attach(ahc) == 0) 464 return; /* succeed */ 465 466 /* failed */ 467 isa_intr_disestablish(ia->ia_ic, ahc->ih); 468 free_io: 469 bus_space_unmap(iot, ioh, ia->ia_io[0].ir_size); 470 } 471 472 /* 473 * Read the 284x SEEPROM. 474 */ 475 void 476 aha2840_load_seeprom(struct ahc_softc *ahc) 477 { 478 struct seeprom_descriptor sd; 479 struct seeprom_config sc; 480 uint8_t scsi_conf; 481 int have_seeprom; 482 483 sd.sd_tag = ahc->tag; 484 sd.sd_bsh = ahc->bsh; 485 sd.sd_control_offset = SEECTL_2840; 486 sd.sd_status_offset = STATUS_2840; 487 sd.sd_dataout_offset = STATUS_2840; 488 sd.sd_chip = C46; 489 sd.sd_MS = 0; 490 sd.sd_RDY = EEPROM_TF; 491 sd.sd_CS = CS_2840; 492 sd.sd_CK = CK_2840; 493 sd.sd_DO = DO_2840; 494 sd.sd_DI = DI_2840; 495 496 if (bootverbose) 497 aprint_verbose("%s: Reading SEEPROM...", ahc_name(ahc)); 498 have_seeprom = read_seeprom(&sd, (uint16_t *)&sc, 499 /*start_addr*/0, sizeof(sc)/2); 500 501 if (have_seeprom) { 502 if (verify_seeprom_cksum(&sc) == 0) { 503 if(bootverbose) 504 aprint_verbose ("checksum error\n"); 505 have_seeprom = 0; 506 } else if (bootverbose) { 507 aprint_verbose("done.\n"); 508 } 509 } 510 511 if (!have_seeprom) { 512 if (bootverbose) 513 aprint_verbose("%s: No SEEPROM available\n", 514 ahc_name(ahc)); 515 ahc->flags |= AHC_USEDEFAULTS; 516 } else { 517 /* 518 * Put the data we've collected down into SRAM 519 * where ahc_init will find it. 520 */ 521 int i; 522 int max_targ = (ahc->features & AHC_WIDE) != 0 ? 16 : 8; 523 uint16_t discenable; 524 525 discenable = 0; 526 for (i = 0; i < max_targ; i++){ 527 uint8_t target_settings; 528 target_settings = (sc.device_flags[i] & CFXFER) << 4; 529 if (sc.device_flags[i] & CFSYNCH) 530 target_settings |= SOFS; 531 if (sc.device_flags[i] & CFWIDEB) 532 target_settings |= WIDEXFER; 533 if (sc.device_flags[i] & CFDISC) 534 discenable |= (0x01 << i); 535 ahc_outb(ahc, TARG_SCSIRATE + i, target_settings); 536 } 537 ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff)); 538 ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff)); 539 540 ahc->our_id = sc.brtime_id & CFSCSIID; 541 542 scsi_conf = (ahc->our_id & 0x7); 543 if (sc.adapter_control & CFSPARITY) 544 scsi_conf |= ENSPCHK; 545 if (sc.adapter_control & CFRESETB) 546 scsi_conf |= RESET_SCSI; 547 548 if (sc.bios_control & CF284XEXTEND) 549 ahc->flags |= AHC_EXTENDED_TRANS_A; 550 /* Set SCSICONF info */ 551 ahc_outb(ahc, SCSICONF, scsi_conf); 552 553 if (sc.adapter_control & CF284XSTERM) 554 ahc->flags |= AHC_TERM_ENB_A; 555 } 556 } 557 558 static int 559 verify_seeprom_cksum(struct seeprom_config *sc) 560 { 561 int i; 562 int maxaddr; 563 uint32_t checksum; 564 uint16_t *scarray; 565 566 maxaddr = (sizeof(*sc)/2) - 1; 567 checksum = 0; 568 scarray = (uint16_t *)sc; 569 570 for (i = 0; i < maxaddr; i++) 571 checksum = checksum + scarray[i]; 572 if (checksum == 0 573 || (checksum & 0xFFFF) != sc->checksum) { 574 return (0); 575 } else { 576 return(1); 577 } 578 } 579
Indexes created Tue Sep 30 20:09:53 GMT 2025