ppc.c revision 71622
1/*- 2 * Copyright (c) 2001 Alcove - Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/dev/ppc/ppc.c 71622 2001-01-25 10:51:41Z nsouch $ 27 * 28 */ 29 30#include "opt_ppc.h" 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/bus.h> 36#include <sys/malloc.h> 37 38#include <vm/vm.h> 39#include <vm/pmap.h> 40#include <machine/clock.h> 41#include <machine/bus.h> 42#include <machine/resource.h> 43#include <machine/vmparam.h> 44#include <sys/rman.h> 45 46#include <isa/isareg.h> 47#include <isa/isavar.h> 48 49#include <dev/ppbus/ppbconf.h> 50#include <dev/ppbus/ppb_msq.h> 51 52#include <isa/ppcreg.h> 53 54#include "ppbus_if.h" 55 56#define LOG_PPC(function, ppc, string) \ 57 if (bootverbose) printf("%s: %s\n", function, string) 58 59 60#define DEVTOSOFTC(dev) ((struct ppc_data *)device_get_softc(dev)) 61 62devclass_t ppc_devclass; 63 64static int ppc_probe(device_t dev); 65static int ppc_attach(device_t dev); 66static int ppc_read_ivar(device_t bus, device_t dev, int index, uintptr_t *val); 67 68static void ppc_reset_epp(device_t); 69static void ppc_ecp_sync(device_t); 70static void ppcintr(void *arg); 71 72static int ppc_exec_microseq(device_t, struct ppb_microseq **); 73static int ppc_setmode(device_t, int); 74 75static int ppc_read(device_t, char *, int, int); 76static int ppc_write(device_t, char *, int, int); 77 78static u_char ppc_io(device_t, int, u_char *, int, u_char); 79 80static int ppc_setup_intr(device_t, device_t, struct resource *, int, 81 void (*)(void *), void *, void **); 82static int ppc_teardown_intr(device_t, device_t, struct resource *, void *); 83 84static device_method_t ppc_methods[] = { 85 /* device interface */ 86 DEVMETHOD(device_probe, ppc_probe), 87 DEVMETHOD(device_attach, ppc_attach), 88 89 /* bus interface */ 90 DEVMETHOD(bus_read_ivar, ppc_read_ivar), 91 DEVMETHOD(bus_setup_intr, ppc_setup_intr), 92 DEVMETHOD(bus_teardown_intr, ppc_teardown_intr), 93 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 94 95 /* ppbus interface */ 96 DEVMETHOD(ppbus_io, ppc_io), 97 DEVMETHOD(ppbus_exec_microseq, ppc_exec_microseq), 98 DEVMETHOD(ppbus_reset_epp, ppc_reset_epp), 99 DEVMETHOD(ppbus_setmode, ppc_setmode), 100 DEVMETHOD(ppbus_ecp_sync, ppc_ecp_sync), 101 DEVMETHOD(ppbus_read, ppc_read), 102 DEVMETHOD(ppbus_write, ppc_write), 103 104 { 0, 0 } 105 }; 106 107static driver_t ppc_driver = { 108 "ppc", 109 ppc_methods, 110 sizeof(struct ppc_data), 111}; 112 113static char *ppc_models[] = { 114 "SMC-like", "SMC FDC37C665GT", "SMC FDC37C666GT", "PC87332", "PC87306", 115 "82091AA", "Generic", "W83877F", "W83877AF", "Winbond", "PC87334", 116 "SMC FDC37C935", "PC87303", 0 117}; 118 119/* list of available modes */ 120static char *ppc_avms[] = { 121 "COMPATIBLE", "NIBBLE-only", "PS2-only", "PS2/NIBBLE", "EPP-only", 122 "EPP/NIBBLE", "EPP/PS2", "EPP/PS2/NIBBLE", "ECP-only", 123 "ECP/NIBBLE", "ECP/PS2", "ECP/PS2/NIBBLE", "ECP/EPP", 124 "ECP/EPP/NIBBLE", "ECP/EPP/PS2", "ECP/EPP/PS2/NIBBLE", 0 125}; 126 127/* list of current executing modes 128 * Note that few modes do not actually exist. 129 */ 130static char *ppc_modes[] = { 131 "COMPATIBLE", "NIBBLE", "PS/2", "PS/2", "EPP", 132 "EPP", "EPP", "EPP", "ECP", 133 "ECP", "ECP+PS2", "ECP+PS2", "ECP+EPP", 134 "ECP+EPP", "ECP+EPP", "ECP+EPP", 0 135}; 136 137static char *ppc_epp_protocol[] = { " (EPP 1.9)", " (EPP 1.7)", 0 }; 138 139#ifdef __i386__ 140/* 141 * BIOS printer list - used by BIOS probe. 142 */ 143#define BIOS_PPC_PORTS 0x408 144#define BIOS_PORTS (short *)(KERNBASE+BIOS_PPC_PORTS) 145#define BIOS_MAX_PPC 4 146#endif 147 148/* 149 * ppc_ecp_sync() XXX 150 */ 151static void 152ppc_ecp_sync(device_t dev) { 153 154 int i, r; 155 struct ppc_data *ppc = DEVTOSOFTC(dev); 156 157 if (!(ppc->ppc_avm & PPB_ECP) && !(ppc->ppc_dtm & PPB_ECP)) 158 return; 159 160 r = r_ecr(ppc); 161 if ((r & 0xe0) != PPC_ECR_EPP) 162 return; 163 164 for (i = 0; i < 100; i++) { 165 r = r_ecr(ppc); 166 if (r & 0x1) 167 return; 168 DELAY(100); 169 } 170 171 printf("ppc%d: ECP sync failed as data still " \ 172 "present in FIFO.\n", ppc->ppc_unit); 173 174 return; 175} 176 177/* 178 * ppc_detect_fifo() 179 * 180 * Detect parallel port FIFO 181 */ 182static int 183ppc_detect_fifo(struct ppc_data *ppc) 184{ 185 char ecr_sav; 186 char ctr_sav, ctr, cc; 187 short i; 188 189 /* save registers */ 190 ecr_sav = r_ecr(ppc); 191 ctr_sav = r_ctr(ppc); 192 193 /* enter ECP configuration mode, no interrupt, no DMA */ 194 w_ecr(ppc, 0xf4); 195 196 /* read PWord size - transfers in FIFO mode must be PWord aligned */ 197 ppc->ppc_pword = (r_cnfgA(ppc) & PPC_PWORD_MASK); 198 199 /* XXX 16 and 32 bits implementations not supported */ 200 if (ppc->ppc_pword != PPC_PWORD_8) { 201 LOG_PPC(__FUNCTION__, ppc, "PWord not supported"); 202 goto error; 203 } 204 205 w_ecr(ppc, 0x34); /* byte mode, no interrupt, no DMA */ 206 ctr = r_ctr(ppc); 207 w_ctr(ppc, ctr | PCD); /* set direction to 1 */ 208 209 /* enter ECP test mode, no interrupt, no DMA */ 210 w_ecr(ppc, 0xd4); 211 212 /* flush the FIFO */ 213 for (i=0; i<1024; i++) { 214 if (r_ecr(ppc) & PPC_FIFO_EMPTY) 215 break; 216 cc = r_fifo(ppc); 217 } 218 219 if (i >= 1024) { 220 LOG_PPC(__FUNCTION__, ppc, "can't flush FIFO"); 221 goto error; 222 } 223 224 /* enable interrupts, no DMA */ 225 w_ecr(ppc, 0xd0); 226 227 /* determine readIntrThreshold 228 * fill the FIFO until serviceIntr is set 229 */ 230 for (i=0; i<1024; i++) { 231 w_fifo(ppc, (char)i); 232 if (!ppc->ppc_rthr && (r_ecr(ppc) & PPC_SERVICE_INTR)) { 233 /* readThreshold reached */ 234 ppc->ppc_rthr = i+1; 235 } 236 if (r_ecr(ppc) & PPC_FIFO_FULL) { 237 ppc->ppc_fifo = i+1; 238 break; 239 } 240 } 241 242 if (i >= 1024) { 243 LOG_PPC(__FUNCTION__, ppc, "can't fill FIFO"); 244 goto error; 245 } 246 247 w_ecr(ppc, 0xd4); /* test mode, no interrupt, no DMA */ 248 w_ctr(ppc, ctr & ~PCD); /* set direction to 0 */ 249 w_ecr(ppc, 0xd0); /* enable interrupts */ 250 251 /* determine writeIntrThreshold 252 * empty the FIFO until serviceIntr is set 253 */ 254 for (i=ppc->ppc_fifo; i>0; i--) { 255 if (r_fifo(ppc) != (char)(ppc->ppc_fifo-i)) { 256 LOG_PPC(__FUNCTION__, ppc, "invalid data in FIFO"); 257 goto error; 258 } 259 if (r_ecr(ppc) & PPC_SERVICE_INTR) { 260 /* writeIntrThreshold reached */ 261 ppc->ppc_wthr = ppc->ppc_fifo - i+1; 262 } 263 /* if FIFO empty before the last byte, error */ 264 if (i>1 && (r_ecr(ppc) & PPC_FIFO_EMPTY)) { 265 LOG_PPC(__FUNCTION__, ppc, "data lost in FIFO"); 266 goto error; 267 } 268 } 269 270 /* FIFO must be empty after the last byte */ 271 if (!(r_ecr(ppc) & PPC_FIFO_EMPTY)) { 272 LOG_PPC(__FUNCTION__, ppc, "can't empty the FIFO"); 273 goto error; 274 } 275 276 w_ctr(ppc, ctr_sav); 277 w_ecr(ppc, ecr_sav); 278 279 return (0); 280 281error: 282 w_ctr(ppc, ctr_sav); 283 w_ecr(ppc, ecr_sav); 284 285 return (EINVAL); 286} 287 288static int 289ppc_detect_port(struct ppc_data *ppc) 290{ 291 292 w_ctr(ppc, 0x0c); /* To avoid missing PS2 ports */ 293 w_dtr(ppc, 0xaa); 294 if (r_dtr(ppc) != 0xaa) 295 return (0); 296 297 return (1); 298} 299 300/* 301 * EPP timeout, according to the PC87332 manual 302 * Semantics of clearing EPP timeout bit. 303 * PC87332 - reading SPP_STR does it... 304 * SMC - write 1 to EPP timeout bit XXX 305 * Others - (?) write 0 to EPP timeout bit 306 */ 307static void 308ppc_reset_epp_timeout(struct ppc_data *ppc) 309{ 310 register char r; 311 312 r = r_str(ppc); 313 w_str(ppc, r | 0x1); 314 w_str(ppc, r & 0xfe); 315 316 return; 317} 318 319static int 320ppc_check_epp_timeout(struct ppc_data *ppc) 321{ 322 ppc_reset_epp_timeout(ppc); 323 324 return (!(r_str(ppc) & TIMEOUT)); 325} 326 327/* 328 * Configure current operating mode 329 */ 330static int 331ppc_generic_setmode(struct ppc_data *ppc, int mode) 332{ 333 u_char ecr = 0; 334 335 /* check if mode is available */ 336 if (mode && !(ppc->ppc_avm & mode)) 337 return (EINVAL); 338 339 /* if ECP mode, configure ecr register */ 340 if ((ppc->ppc_avm & PPB_ECP) || (ppc->ppc_dtm & PPB_ECP)) { 341 /* return to byte mode (keeping direction bit), 342 * no interrupt, no DMA to be able to change to 343 * ECP 344 */ 345 w_ecr(ppc, PPC_ECR_RESET); 346 ecr = PPC_DISABLE_INTR; 347 348 if (mode & PPB_EPP) 349 return (EINVAL); 350 else if (mode & PPB_ECP) 351 /* select ECP mode */ 352 ecr |= PPC_ECR_ECP; 353 else if (mode & PPB_PS2) 354 /* select PS2 mode with ECP */ 355 ecr |= PPC_ECR_PS2; 356 else 357 /* select COMPATIBLE/NIBBLE mode */ 358 ecr |= PPC_ECR_STD; 359 360 w_ecr(ppc, ecr); 361 } 362 363 ppc->ppc_mode = mode; 364 365 return (0); 366} 367 368/* 369 * The ppc driver is free to choose options like FIFO or DMA 370 * if ECP mode is available. 371 * 372 * The 'RAW' option allows the upper drivers to force the ppc mode 373 * even with FIFO, DMA available. 374 */ 375static int 376ppc_smclike_setmode(struct ppc_data *ppc, int mode) 377{ 378 u_char ecr = 0; 379 380 /* check if mode is available */ 381 if (mode && !(ppc->ppc_avm & mode)) 382 return (EINVAL); 383 384 /* if ECP mode, configure ecr register */ 385 if ((ppc->ppc_avm & PPB_ECP) || (ppc->ppc_dtm & PPB_ECP)) { 386 /* return to byte mode (keeping direction bit), 387 * no interrupt, no DMA to be able to change to 388 * ECP or EPP mode 389 */ 390 w_ecr(ppc, PPC_ECR_RESET); 391 ecr = PPC_DISABLE_INTR; 392 393 if (mode & PPB_EPP) 394 /* select EPP mode */ 395 ecr |= PPC_ECR_EPP; 396 else if (mode & PPB_ECP) 397 /* select ECP mode */ 398 ecr |= PPC_ECR_ECP; 399 else if (mode & PPB_PS2) 400 /* select PS2 mode with ECP */ 401 ecr |= PPC_ECR_PS2; 402 else 403 /* select COMPATIBLE/NIBBLE mode */ 404 ecr |= PPC_ECR_STD; 405 406 w_ecr(ppc, ecr); 407 } 408 409 ppc->ppc_mode = mode; 410 411 return (0); 412} 413 414#ifdef PPC_PROBE_CHIPSET 415/* 416 * ppc_pc873xx_detect 417 * 418 * Probe for a Natsemi PC873xx-family part. 419 * 420 * References in this function are to the National Semiconductor 421 * PC87332 datasheet TL/C/11930, May 1995 revision. 422 */ 423static int pc873xx_basetab[] = {0x0398, 0x026e, 0x015c, 0x002e, 0}; 424static int pc873xx_porttab[] = {0x0378, 0x03bc, 0x0278, 0}; 425static int pc873xx_irqtab[] = {5, 7, 5, 0}; 426 427static int pc873xx_regstab[] = { 428 PC873_FER, PC873_FAR, PC873_PTR, 429 PC873_FCR, PC873_PCR, PC873_PMC, 430 PC873_TUP, PC873_SID, PC873_PNP0, 431 PC873_PNP1, PC873_LPTBA, -1 432}; 433 434static char *pc873xx_rnametab[] = { 435 "FER", "FAR", "PTR", "FCR", "PCR", 436 "PMC", "TUP", "SID", "PNP0", "PNP1", 437 "LPTBA", NULL 438}; 439 440static int 441ppc_pc873xx_detect(struct ppc_data *ppc, int chipset_mode) /* XXX mode never forced */ 442{ 443 static int index = 0; 444 int idport, irq; 445 int ptr, pcr, val, i; 446 447 while ((idport = pc873xx_basetab[index++])) { 448 449 /* XXX should check first to see if this location is already claimed */ 450 451 /* 452 * Pull the 873xx through the power-on ID cycle (2.2,1.). 453 * We can't use this to locate the chip as it may already have 454 * been used by the BIOS. 455 */ 456 (void)inb(idport); (void)inb(idport); 457 (void)inb(idport); (void)inb(idport); 458 459 /* 460 * Read the SID byte. Possible values are : 461 * 462 * 01010xxx PC87334 463 * 0001xxxx PC87332 464 * 01110xxx PC87306 465 * 00110xxx PC87303 466 */ 467 outb(idport, PC873_SID); 468 val = inb(idport + 1); 469 if ((val & 0xf0) == 0x10) { 470 ppc->ppc_model = NS_PC87332; 471 } else if ((val & 0xf8) == 0x70) { 472 ppc->ppc_model = NS_PC87306; 473 } else if ((val & 0xf8) == 0x50) { 474 ppc->ppc_model = NS_PC87334; 475 } else if ((val & 0xf8) == 0x40) { /* Should be 0x30 by the 476 documentation, but probing 477 yielded 0x40... */ 478 ppc->ppc_model = NS_PC87303; 479 } else { 480 if (bootverbose && (val != 0xff)) 481 printf("PC873xx probe at 0x%x got unknown ID 0x%x\n", idport, val); 482 continue ; /* not recognised */ 483 } 484 485 /* print registers */ 486 if (bootverbose) { 487 printf("PC873xx"); 488 for (i=0; pc873xx_regstab[i] != -1; i++) { 489 outb(idport, pc873xx_regstab[i]); 490 printf(" %s=0x%x", pc873xx_rnametab[i], 491 inb(idport + 1) & 0xff); 492 } 493 printf("\n"); 494 } 495 496 /* 497 * We think we have one. Is it enabled and where we want it to be? 498 */ 499 outb(idport, PC873_FER); 500 val = inb(idport + 1); 501 if (!(val & PC873_PPENABLE)) { 502 if (bootverbose) 503 printf("PC873xx parallel port disabled\n"); 504 continue; 505 } 506 outb(idport, PC873_FAR); 507 val = inb(idport + 1); 508 /* XXX we should create a driver instance for every port found */ 509 if (pc873xx_porttab[val & 0x3] != ppc->ppc_base) { 510 511 /* First try to change the port address to that requested... */ 512 513 switch(ppc->ppc_base) { 514 case 0x378: 515 val &= 0xfc; 516 break; 517 518 case 0x3bc: 519 val &= 0xfd; 520 break; 521 522 case 0x278: 523 val &= 0xfe; 524 break; 525 526 default: 527 val &= 0xfd; 528 break; 529 } 530 531 outb(idport, PC873_FAR); 532 outb(idport + 1, val); 533 outb(idport + 1, val); 534 535 /* Check for success by reading back the value we supposedly 536 wrote and comparing...*/ 537 538 outb(idport, PC873_FAR); 539 val = inb(idport + 1) & 0x3; 540 541 /* If we fail, report the failure... */ 542 543 if (pc873xx_porttab[val] != ppc->ppc_base) { 544 if (bootverbose) 545 printf("PC873xx at 0x%x not for driver at port 0x%x\n", 546 pc873xx_porttab[val], ppc->ppc_base); 547 } 548 continue; 549 } 550 551 outb(idport, PC873_PTR); 552 ptr = inb(idport + 1); 553 554 /* get irq settings */ 555 if (ppc->ppc_base == 0x378) 556 irq = (ptr & PC873_LPTBIRQ7) ? 7 : 5; 557 else 558 irq = pc873xx_irqtab[val]; 559 560 if (bootverbose) 561 printf("PC873xx irq %d at 0x%x\n", irq, ppc->ppc_base); 562 563 /* 564 * Check if irq settings are correct 565 */ 566 if (irq != ppc->ppc_irq) { 567 /* 568 * If the chipset is not locked and base address is 0x378, 569 * we have another chance 570 */ 571 if (ppc->ppc_base == 0x378 && !(ptr & PC873_CFGLOCK)) { 572 if (ppc->ppc_irq == 7) { 573 outb(idport + 1, (ptr | PC873_LPTBIRQ7)); 574 outb(idport + 1, (ptr | PC873_LPTBIRQ7)); 575 } else { 576 outb(idport + 1, (ptr & ~PC873_LPTBIRQ7)); 577 outb(idport + 1, (ptr & ~PC873_LPTBIRQ7)); 578 } 579 if (bootverbose) 580 printf("PC873xx irq set to %d\n", ppc->ppc_irq); 581 } else { 582 if (bootverbose) 583 printf("PC873xx sorry, can't change irq setting\n"); 584 } 585 } else { 586 if (bootverbose) 587 printf("PC873xx irq settings are correct\n"); 588 } 589 590 outb(idport, PC873_PCR); 591 pcr = inb(idport + 1); 592 593 if ((ptr & PC873_CFGLOCK) || !chipset_mode) { 594 if (bootverbose) 595 printf("PC873xx %s", (ptr & PC873_CFGLOCK)?"locked":"unlocked"); 596 597 ppc->ppc_avm |= PPB_NIBBLE; 598 if (bootverbose) 599 printf(", NIBBLE"); 600 601 if (pcr & PC873_EPPEN) { 602 ppc->ppc_avm |= PPB_EPP; 603 604 if (bootverbose) 605 printf(", EPP"); 606 607 if (pcr & PC873_EPP19) 608 ppc->ppc_epp = EPP_1_9; 609 else 610 ppc->ppc_epp = EPP_1_7; 611 612 if ((ppc->ppc_model == NS_PC87332) && bootverbose) { 613 outb(idport, PC873_PTR); 614 ptr = inb(idport + 1); 615 if (ptr & PC873_EPPRDIR) 616 printf(", Regular mode"); 617 else 618 printf(", Automatic mode"); 619 } 620 } else if (pcr & PC873_ECPEN) { 621 ppc->ppc_avm |= PPB_ECP; 622 if (bootverbose) 623 printf(", ECP"); 624 625 if (pcr & PC873_ECPCLK) { /* XXX */ 626 ppc->ppc_avm |= PPB_PS2; 627 if (bootverbose) 628 printf(", PS/2"); 629 } 630 } else { 631 outb(idport, PC873_PTR); 632 ptr = inb(idport + 1); 633 if (ptr & PC873_EXTENDED) { 634 ppc->ppc_avm |= PPB_SPP; 635 if (bootverbose) 636 printf(", SPP"); 637 } 638 } 639 } else { 640 if (bootverbose) 641 printf("PC873xx unlocked"); 642 643 if (chipset_mode & PPB_ECP) { 644 if ((chipset_mode & PPB_EPP) && bootverbose) 645 printf(", ECP+EPP not supported"); 646 647 pcr &= ~PC873_EPPEN; 648 pcr |= (PC873_ECPEN | PC873_ECPCLK); /* XXX */ 649 outb(idport + 1, pcr); 650 outb(idport + 1, pcr); 651 652 if (bootverbose) 653 printf(", ECP"); 654 655 } else if (chipset_mode & PPB_EPP) { 656 pcr &= ~(PC873_ECPEN | PC873_ECPCLK); 657 pcr |= (PC873_EPPEN | PC873_EPP19); 658 outb(idport + 1, pcr); 659 outb(idport + 1, pcr); 660 661 ppc->ppc_epp = EPP_1_9; /* XXX */ 662 663 if (bootverbose) 664 printf(", EPP1.9"); 665 666 /* enable automatic direction turnover */ 667 if (ppc->ppc_model == NS_PC87332) { 668 outb(idport, PC873_PTR); 669 ptr = inb(idport + 1); 670 ptr &= ~PC873_EPPRDIR; 671 outb(idport + 1, ptr); 672 outb(idport + 1, ptr); 673 674 if (bootverbose) 675 printf(", Automatic mode"); 676 } 677 } else { 678 pcr &= ~(PC873_ECPEN | PC873_ECPCLK | PC873_EPPEN); 679 outb(idport + 1, pcr); 680 outb(idport + 1, pcr); 681 682 /* configure extended bit in PTR */ 683 outb(idport, PC873_PTR); 684 ptr = inb(idport + 1); 685 686 if (chipset_mode & PPB_PS2) { 687 ptr |= PC873_EXTENDED; 688 689 if (bootverbose) 690 printf(", PS/2"); 691 692 } else { 693 /* default to NIBBLE mode */ 694 ptr &= ~PC873_EXTENDED; 695 696 if (bootverbose) 697 printf(", NIBBLE"); 698 } 699 outb(idport + 1, ptr); 700 outb(idport + 1, ptr); 701 } 702 703 ppc->ppc_avm = chipset_mode; 704 } 705 706 if (bootverbose) 707 printf("\n"); 708 709 ppc->ppc_type = PPC_TYPE_GENERIC; 710 ppc_generic_setmode(ppc, chipset_mode); 711 712 return(chipset_mode); 713 } 714 return(-1); 715} 716 717/* 718 * ppc_smc37c66xgt_detect 719 * 720 * SMC FDC37C66xGT configuration. 721 */ 722static int 723ppc_smc37c66xgt_detect(struct ppc_data *ppc, int chipset_mode) 724{ 725 int s, i; 726 u_char r; 727 int type = -1; 728 int csr = SMC66x_CSR; /* initial value is 0x3F0 */ 729 730 int port_address[] = { -1 /* disabled */ , 0x3bc, 0x378, 0x278 }; 731 732 733#define cio csr+1 /* config IO port is either 0x3F1 or 0x371 */ 734 735 /* 736 * Detection: enter configuration mode and read CRD register. 737 */ 738 739 s = splhigh(); 740 outb(csr, SMC665_iCODE); 741 outb(csr, SMC665_iCODE); 742 splx(s); 743 744 outb(csr, 0xd); 745 if (inb(cio) == 0x65) { 746 type = SMC_37C665GT; 747 goto config; 748 } 749 750 for (i = 0; i < 2; i++) { 751 s = splhigh(); 752 outb(csr, SMC666_iCODE); 753 outb(csr, SMC666_iCODE); 754 splx(s); 755 756 outb(csr, 0xd); 757 if (inb(cio) == 0x66) { 758 type = SMC_37C666GT; 759 break; 760 } 761 762 /* Another chance, CSR may be hard-configured to be at 0x370 */ 763 csr = SMC666_CSR; 764 } 765 766config: 767 /* 768 * If chipset not found, do not continue. 769 */ 770 if (type == -1) 771 return (-1); 772 773 /* select CR1 */ 774 outb(csr, 0x1); 775 776 /* read the port's address: bits 0 and 1 of CR1 */ 777 r = inb(cio) & SMC_CR1_ADDR; 778 if (port_address[(int)r] != ppc->ppc_base) 779 return (-1); 780 781 ppc->ppc_model = type; 782 783 /* 784 * CR1 and CR4 registers bits 3 and 0/1 for mode configuration 785 * If SPP mode is detected, try to set ECP+EPP mode 786 */ 787 788 if (bootverbose) { 789 outb(csr, 0x1); 790 printf("ppc%d: SMC registers CR1=0x%x", ppc->ppc_unit, 791 inb(cio) & 0xff); 792 793 outb(csr, 0x4); 794 printf(" CR4=0x%x", inb(cio) & 0xff); 795 } 796 797 /* select CR1 */ 798 outb(csr, 0x1); 799 800 if (!chipset_mode) { 801 /* autodetect mode */ 802 803 /* 666GT is ~certainly~ hardwired to an extended ECP+EPP mode */ 804 if (type == SMC_37C666GT) { 805 ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP; 806 if (bootverbose) 807 printf(" configuration hardwired, supposing " \ 808 "ECP+EPP SPP"); 809 810 } else 811 if ((inb(cio) & SMC_CR1_MODE) == 0) { 812 /* already in extended parallel port mode, read CR4 */ 813 outb(csr, 0x4); 814 r = (inb(cio) & SMC_CR4_EMODE); 815 816 switch (r) { 817 case SMC_SPP: 818 ppc->ppc_avm |= PPB_SPP; 819 if (bootverbose) 820 printf(" SPP"); 821 break; 822 823 case SMC_EPPSPP: 824 ppc->ppc_avm |= PPB_EPP | PPB_SPP; 825 if (bootverbose) 826 printf(" EPP SPP"); 827 break; 828 829 case SMC_ECP: 830 ppc->ppc_avm |= PPB_ECP | PPB_SPP; 831 if (bootverbose) 832 printf(" ECP SPP"); 833 break; 834 835 case SMC_ECPEPP: 836 ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP; 837 if (bootverbose) 838 printf(" ECP+EPP SPP"); 839 break; 840 } 841 } else { 842 /* not an extended port mode */ 843 ppc->ppc_avm |= PPB_SPP; 844 if (bootverbose) 845 printf(" SPP"); 846 } 847 848 } else { 849 /* mode forced */ 850 ppc->ppc_avm = chipset_mode; 851 852 /* 666GT is ~certainly~ hardwired to an extended ECP+EPP mode */ 853 if (type == SMC_37C666GT) 854 goto end_detect; 855 856 r = inb(cio); 857 if ((chipset_mode & (PPB_ECP | PPB_EPP)) == 0) { 858 /* do not use ECP when the mode is not forced to */ 859 outb(cio, r | SMC_CR1_MODE); 860 if (bootverbose) 861 printf(" SPP"); 862 } else { 863 /* an extended mode is selected */ 864 outb(cio, r & ~SMC_CR1_MODE); 865 866 /* read CR4 register and reset mode field */ 867 outb(csr, 0x4); 868 r = inb(cio) & ~SMC_CR4_EMODE; 869 870 if (chipset_mode & PPB_ECP) { 871 if (chipset_mode & PPB_EPP) { 872 outb(cio, r | SMC_ECPEPP); 873 if (bootverbose) 874 printf(" ECP+EPP"); 875 } else { 876 outb(cio, r | SMC_ECP); 877 if (bootverbose) 878 printf(" ECP"); 879 } 880 } else { 881 /* PPB_EPP is set */ 882 outb(cio, r | SMC_EPPSPP); 883 if (bootverbose) 884 printf(" EPP SPP"); 885 } 886 } 887 ppc->ppc_avm = chipset_mode; 888 } 889 890 /* set FIFO threshold to 16 */ 891 if (ppc->ppc_avm & PPB_ECP) { 892 /* select CRA */ 893 outb(csr, 0xa); 894 outb(cio, 16); 895 } 896 897end_detect: 898 899 if (bootverbose) 900 printf ("\n"); 901 902 if (ppc->ppc_avm & PPB_EPP) { 903 /* select CR4 */ 904 outb(csr, 0x4); 905 r = inb(cio); 906 907 /* 908 * Set the EPP protocol... 909 * Low=EPP 1.9 (1284 standard) and High=EPP 1.7 910 */ 911 if (ppc->ppc_epp == EPP_1_9) 912 outb(cio, (r & ~SMC_CR4_EPPTYPE)); 913 else 914 outb(cio, (r | SMC_CR4_EPPTYPE)); 915 } 916 917 /* end config mode */ 918 outb(csr, 0xaa); 919 920 ppc->ppc_type = PPC_TYPE_SMCLIKE; 921 ppc_smclike_setmode(ppc, chipset_mode); 922 923 return (chipset_mode); 924} 925 926/* 927 * SMC FDC37C935 configuration 928 * Found on many Alpha machines 929 */ 930static int 931ppc_smc37c935_detect(struct ppc_data *ppc, int chipset_mode) 932{ 933 int s; 934 int type = -1; 935 936 s = splhigh(); 937 outb(SMC935_CFG, 0x55); /* enter config mode */ 938 outb(SMC935_CFG, 0x55); 939 splx(s); 940 941 outb(SMC935_IND, SMC935_ID); /* check device id */ 942 if (inb(SMC935_DAT) == 0x2) 943 type = SMC_37C935; 944 945 if (type == -1) { 946 outb(SMC935_CFG, 0xaa); /* exit config mode */ 947 return (-1); 948 } 949 950 ppc->ppc_model = type; 951 952 outb(SMC935_IND, SMC935_LOGDEV); /* select parallel port, */ 953 outb(SMC935_DAT, 3); /* which is logical device 3 */ 954 955 /* set io port base */ 956 outb(SMC935_IND, SMC935_PORTHI); 957 outb(SMC935_DAT, (u_char)((ppc->ppc_base & 0xff00) >> 8)); 958 outb(SMC935_IND, SMC935_PORTLO); 959 outb(SMC935_DAT, (u_char)(ppc->ppc_base & 0xff)); 960 961 if (!chipset_mode) 962 ppc->ppc_avm = PPB_COMPATIBLE; /* default mode */ 963 else { 964 ppc->ppc_avm = chipset_mode; 965 outb(SMC935_IND, SMC935_PPMODE); 966 outb(SMC935_DAT, SMC935_CENT); /* start in compatible mode */ 967 968 /* SPP + EPP or just plain SPP */ 969 if (chipset_mode & (PPB_SPP)) { 970 if (chipset_mode & PPB_EPP) { 971 if (ppc->ppc_epp == EPP_1_9) { 972 outb(SMC935_IND, SMC935_PPMODE); 973 outb(SMC935_DAT, SMC935_EPP19SPP); 974 } 975 if (ppc->ppc_epp == EPP_1_7) { 976 outb(SMC935_IND, SMC935_PPMODE); 977 outb(SMC935_DAT, SMC935_EPP17SPP); 978 } 979 } else { 980 outb(SMC935_IND, SMC935_PPMODE); 981 outb(SMC935_DAT, SMC935_SPP); 982 } 983 } 984 985 /* ECP + EPP or just plain ECP */ 986 if (chipset_mode & PPB_ECP) { 987 if (chipset_mode & PPB_EPP) { 988 if (ppc->ppc_epp == EPP_1_9) { 989 outb(SMC935_IND, SMC935_PPMODE); 990 outb(SMC935_DAT, SMC935_ECPEPP19); 991 } 992 if (ppc->ppc_epp == EPP_1_7) { 993 outb(SMC935_IND, SMC935_PPMODE); 994 outb(SMC935_DAT, SMC935_ECPEPP17); 995 } 996 } else { 997 outb(SMC935_IND, SMC935_PPMODE); 998 outb(SMC935_DAT, SMC935_ECP); 999 } 1000 } 1001 } 1002 1003 outb(SMC935_CFG, 0xaa); /* exit config mode */ 1004 1005 ppc->ppc_type = PPC_TYPE_SMCLIKE; 1006 ppc_smclike_setmode(ppc, chipset_mode); 1007 1008 return (chipset_mode); 1009} 1010 1011/* 1012 * Winbond W83877F stuff 1013 * 1014 * EFER: extended function enable register 1015 * EFIR: extended function index register 1016 * EFDR: extended function data register 1017 */ 1018#define efir ((efer == 0x250) ? 0x251 : 0x3f0) 1019#define efdr ((efer == 0x250) ? 0x252 : 0x3f1) 1020 1021static int w83877f_efers[] = { 0x250, 0x3f0, 0x3f0, 0x250 }; 1022static int w83877f_keys[] = { 0x89, 0x86, 0x87, 0x88 }; 1023static int w83877f_keyiter[] = { 1, 2, 2, 1 }; 1024static int w83877f_hefs[] = { WINB_HEFERE, WINB_HEFRAS, WINB_HEFERE | WINB_HEFRAS, 0 }; 1025 1026static int 1027ppc_w83877f_detect(struct ppc_data *ppc, int chipset_mode) 1028{ 1029 int i, j, efer; 1030 unsigned char r, hefere, hefras; 1031 1032 for (i = 0; i < 4; i ++) { 1033 /* first try to enable configuration registers */ 1034 efer = w83877f_efers[i]; 1035 1036 /* write the key to the EFER */ 1037 for (j = 0; j < w83877f_keyiter[i]; j ++) 1038 outb (efer, w83877f_keys[i]); 1039 1040 /* then check HEFERE and HEFRAS bits */ 1041 outb (efir, 0x0c); 1042 hefere = inb(efdr) & WINB_HEFERE; 1043 1044 outb (efir, 0x16); 1045 hefras = inb(efdr) & WINB_HEFRAS; 1046 1047 /* 1048 * HEFRAS HEFERE 1049 * 0 1 write 89h to 250h (power-on default) 1050 * 1 0 write 86h twice to 3f0h 1051 * 1 1 write 87h twice to 3f0h 1052 * 0 0 write 88h to 250h 1053 */ 1054 if ((hefere | hefras) == w83877f_hefs[i]) 1055 goto found; 1056 } 1057 1058 return (-1); /* failed */ 1059 1060found: 1061 /* check base port address - read from CR23 */ 1062 outb(efir, 0x23); 1063 if (ppc->ppc_base != inb(efdr) * 4) /* 4 bytes boundaries */ 1064 return (-1); 1065 1066 /* read CHIP ID from CR9/bits0-3 */ 1067 outb(efir, 0x9); 1068 1069 switch (inb(efdr) & WINB_CHIPID) { 1070 case WINB_W83877F_ID: 1071 ppc->ppc_model = WINB_W83877F; 1072 break; 1073 1074 case WINB_W83877AF_ID: 1075 ppc->ppc_model = WINB_W83877AF; 1076 break; 1077 1078 default: 1079 ppc->ppc_model = WINB_UNKNOWN; 1080 } 1081 1082 if (bootverbose) { 1083 /* dump of registers */ 1084 printf("ppc%d: 0x%x - ", ppc->ppc_unit, w83877f_keys[i]); 1085 for (i = 0; i <= 0xd; i ++) { 1086 outb(efir, i); 1087 printf("0x%x ", inb(efdr)); 1088 } 1089 for (i = 0x10; i <= 0x17; i ++) { 1090 outb(efir, i); 1091 printf("0x%x ", inb(efdr)); 1092 } 1093 outb(efir, 0x1e); 1094 printf("0x%x ", inb(efdr)); 1095 for (i = 0x20; i <= 0x29; i ++) { 1096 outb(efir, i); 1097 printf("0x%x ", inb(efdr)); 1098 } 1099 printf("\n"); 1100 printf("ppc%d:", ppc->ppc_unit); 1101 } 1102 1103 ppc->ppc_type = PPC_TYPE_GENERIC; 1104 1105 if (!chipset_mode) { 1106 /* autodetect mode */ 1107 1108 /* select CR0 */ 1109 outb(efir, 0x0); 1110 r = inb(efdr) & (WINB_PRTMODS0 | WINB_PRTMODS1); 1111 1112 /* select CR9 */ 1113 outb(efir, 0x9); 1114 r |= (inb(efdr) & WINB_PRTMODS2); 1115 1116 switch (r) { 1117 case WINB_W83757: 1118 if (bootverbose) 1119 printf("ppc%d: W83757 compatible mode\n", 1120 ppc->ppc_unit); 1121 return (-1); /* generic or SMC-like */ 1122 1123 case WINB_EXTFDC: 1124 case WINB_EXTADP: 1125 case WINB_EXT2FDD: 1126 case WINB_JOYSTICK: 1127 if (bootverbose) 1128 printf(" not in parallel port mode\n"); 1129 return (-1); 1130 1131 case (WINB_PARALLEL | WINB_EPP_SPP): 1132 ppc->ppc_avm |= PPB_EPP | PPB_SPP; 1133 if (bootverbose) 1134 printf(" EPP SPP"); 1135 break; 1136 1137 case (WINB_PARALLEL | WINB_ECP): 1138 ppc->ppc_avm |= PPB_ECP | PPB_SPP; 1139 if (bootverbose) 1140 printf(" ECP SPP"); 1141 break; 1142 1143 case (WINB_PARALLEL | WINB_ECP_EPP): 1144 ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP; 1145 ppc->ppc_type = PPC_TYPE_SMCLIKE; 1146 1147 if (bootverbose) 1148 printf(" ECP+EPP SPP"); 1149 break; 1150 default: 1151 printf("%s: unknown case (0x%x)!\n", __FUNCTION__, r); 1152 } 1153 1154 } else { 1155 /* mode forced */ 1156 1157 /* select CR9 and set PRTMODS2 bit */ 1158 outb(efir, 0x9); 1159 outb(efdr, inb(efdr) & ~WINB_PRTMODS2); 1160 1161 /* select CR0 and reset PRTMODSx bits */ 1162 outb(efir, 0x0); 1163 outb(efdr, inb(efdr) & ~(WINB_PRTMODS0 | WINB_PRTMODS1)); 1164 1165 if (chipset_mode & PPB_ECP) { 1166 if (chipset_mode & PPB_EPP) { 1167 outb(efdr, inb(efdr) | WINB_ECP_EPP); 1168 if (bootverbose) 1169 printf(" ECP+EPP"); 1170 1171 ppc->ppc_type = PPC_TYPE_SMCLIKE; 1172 1173 } else { 1174 outb(efdr, inb(efdr) | WINB_ECP); 1175 if (bootverbose) 1176 printf(" ECP"); 1177 } 1178 } else { 1179 /* select EPP_SPP otherwise */ 1180 outb(efdr, inb(efdr) | WINB_EPP_SPP); 1181 if (bootverbose) 1182 printf(" EPP SPP"); 1183 } 1184 ppc->ppc_avm = chipset_mode; 1185 } 1186 1187 if (bootverbose) 1188 printf("\n"); 1189 1190 /* exit configuration mode */ 1191 outb(efer, 0xaa); 1192 1193 switch (ppc->ppc_type) { 1194 case PPC_TYPE_SMCLIKE: 1195 ppc_smclike_setmode(ppc, chipset_mode); 1196 break; 1197 default: 1198 ppc_generic_setmode(ppc, chipset_mode); 1199 break; 1200 } 1201 1202 return (chipset_mode); 1203} 1204#endif 1205 1206/* 1207 * ppc_generic_detect 1208 */ 1209static int 1210ppc_generic_detect(struct ppc_data *ppc, int chipset_mode) 1211{ 1212 /* default to generic */ 1213 ppc->ppc_type = PPC_TYPE_GENERIC; 1214 1215 if (bootverbose) 1216 printf("ppc%d:", ppc->ppc_unit); 1217 1218 /* first, check for ECP */ 1219 w_ecr(ppc, PPC_ECR_PS2); 1220 if ((r_ecr(ppc) & 0xe0) == PPC_ECR_PS2) { 1221 ppc->ppc_dtm |= PPB_ECP | PPB_SPP; 1222 if (bootverbose) 1223 printf(" ECP SPP"); 1224 1225 /* search for SMC style ECP+EPP mode */ 1226 w_ecr(ppc, PPC_ECR_EPP); 1227 } 1228 1229 /* try to reset EPP timeout bit */ 1230 if (ppc_check_epp_timeout(ppc)) { 1231 ppc->ppc_dtm |= PPB_EPP; 1232 1233 if (ppc->ppc_dtm & PPB_ECP) { 1234 /* SMC like chipset found */ 1235 ppc->ppc_model = SMC_LIKE; 1236 ppc->ppc_type = PPC_TYPE_SMCLIKE; 1237 1238 if (bootverbose) 1239 printf(" ECP+EPP"); 1240 } else { 1241 if (bootverbose) 1242 printf(" EPP"); 1243 } 1244 } else { 1245 /* restore to standard mode */ 1246 w_ecr(ppc, PPC_ECR_STD); 1247 } 1248 1249 /* XXX try to detect NIBBLE and PS2 modes */ 1250 ppc->ppc_dtm |= PPB_NIBBLE; 1251 1252 if (bootverbose) 1253 printf(" SPP"); 1254 1255 if (chipset_mode) 1256 ppc->ppc_avm = chipset_mode; 1257 else 1258 ppc->ppc_avm = ppc->ppc_dtm; 1259 1260 if (bootverbose) 1261 printf("\n"); 1262 1263 switch (ppc->ppc_type) { 1264 case PPC_TYPE_SMCLIKE: 1265 ppc_smclike_setmode(ppc, chipset_mode); 1266 break; 1267 default: 1268 ppc_generic_setmode(ppc, chipset_mode); 1269 break; 1270 } 1271 1272 return (chipset_mode); 1273} 1274 1275/* 1276 * ppc_detect() 1277 * 1278 * mode is the mode suggested at boot 1279 */ 1280static int 1281ppc_detect(struct ppc_data *ppc, int chipset_mode) { 1282 1283#ifdef PPC_PROBE_CHIPSET 1284 int i, mode; 1285 1286 /* list of supported chipsets */ 1287 int (*chipset_detect[])(struct ppc_data *, int) = { 1288 ppc_pc873xx_detect, 1289 ppc_smc37c66xgt_detect, 1290 ppc_w83877f_detect, 1291 ppc_smc37c935_detect, 1292 ppc_generic_detect, 1293 NULL 1294 }; 1295#endif 1296 1297 /* if can't find the port and mode not forced return error */ 1298 if (!ppc_detect_port(ppc) && chipset_mode == 0) 1299 return (EIO); /* failed, port not present */ 1300 1301 /* assume centronics compatible mode is supported */ 1302 ppc->ppc_avm = PPB_COMPATIBLE; 1303 1304#ifdef PPC_PROBE_CHIPSET 1305 /* we have to differenciate available chipset modes, 1306 * chipset running modes and IEEE-1284 operating modes 1307 * 1308 * after detection, the port must support running in compatible mode 1309 */ 1310 if (ppc->ppc_flags & 0x40) { 1311 if (bootverbose) 1312 printf("ppc: chipset forced to generic\n"); 1313#endif 1314 1315 ppc->ppc_mode = ppc_generic_detect(ppc, chipset_mode); 1316 1317#ifdef PPC_PROBE_CHIPSET 1318 } else { 1319 for (i=0; chipset_detect[i] != NULL; i++) { 1320 if ((mode = chipset_detect[i](ppc, chipset_mode)) != -1) { 1321 ppc->ppc_mode = mode; 1322 break; 1323 } 1324 } 1325 } 1326#endif 1327 1328 /* configure/detect ECP FIFO */ 1329 if ((ppc->ppc_avm & PPB_ECP) && !(ppc->ppc_flags & 0x80)) 1330 ppc_detect_fifo(ppc); 1331 1332 return (0); 1333} 1334 1335/* 1336 * ppc_exec_microseq() 1337 * 1338 * Execute a microsequence. 1339 * Microsequence mechanism is supposed to handle fast I/O operations. 1340 */ 1341static int 1342ppc_exec_microseq(device_t dev, struct ppb_microseq **p_msq) 1343{ 1344 struct ppc_data *ppc = DEVTOSOFTC(dev); 1345 struct ppb_microseq *mi; 1346 char cc, *p; 1347 int i, iter, len; 1348 int error; 1349 1350 register int reg; 1351 register char mask; 1352 register int accum = 0; 1353 register char *ptr = 0; 1354 1355 struct ppb_microseq *stack = 0; 1356 1357/* microsequence registers are equivalent to PC-like port registers */ 1358#define r_reg(register,ppc) (inb((ppc)->ppc_base + register)) 1359#define w_reg(register,ppc,byte) outb((ppc)->ppc_base + register, byte) 1360 1361#define INCR_PC (mi ++) /* increment program counter */ 1362 1363 mi = *p_msq; 1364 for (;;) { 1365 switch (mi->opcode) { 1366 case MS_OP_RSET: 1367 cc = r_reg(mi->arg[0].i, ppc); 1368 cc &= (char)mi->arg[2].i; /* clear mask */ 1369 cc |= (char)mi->arg[1].i; /* assert mask */ 1370 w_reg(mi->arg[0].i, ppc, cc); 1371 INCR_PC; 1372 break; 1373 1374 case MS_OP_RASSERT_P: 1375 reg = mi->arg[1].i; 1376 ptr = ppc->ppc_ptr; 1377 1378 if ((len = mi->arg[0].i) == MS_ACCUM) { 1379 accum = ppc->ppc_accum; 1380 for (; accum; accum--) 1381 w_reg(reg, ppc, *ptr++); 1382 ppc->ppc_accum = accum; 1383 } else 1384 for (i=0; i<len; i++) 1385 w_reg(reg, ppc, *ptr++); 1386 ppc->ppc_ptr = ptr; 1387 1388 INCR_PC; 1389 break; 1390 1391 case MS_OP_RFETCH_P: 1392 reg = mi->arg[1].i; 1393 mask = (char)mi->arg[2].i; 1394 ptr = ppc->ppc_ptr; 1395 1396 if ((len = mi->arg[0].i) == MS_ACCUM) { 1397 accum = ppc->ppc_accum; 1398 for (; accum; accum--) 1399 *ptr++ = r_reg(reg, ppc) & mask; 1400 ppc->ppc_accum = accum; 1401 } else 1402 for (i=0; i<len; i++) 1403 *ptr++ = r_reg(reg, ppc) & mask; 1404 ppc->ppc_ptr = ptr; 1405 1406 INCR_PC; 1407 break; 1408 1409 case MS_OP_RFETCH: 1410 *((char *) mi->arg[2].p) = r_reg(mi->arg[0].i, ppc) & 1411 (char)mi->arg[1].i; 1412 INCR_PC; 1413 break; 1414 1415 case MS_OP_RASSERT: 1416 case MS_OP_DELAY: 1417 1418 /* let's suppose the next instr. is the same */ 1419 prefetch: 1420 for (;mi->opcode == MS_OP_RASSERT; INCR_PC) 1421 w_reg(mi->arg[0].i, ppc, (char)mi->arg[1].i); 1422 1423 if (mi->opcode == MS_OP_DELAY) { 1424 DELAY(mi->arg[0].i); 1425 INCR_PC; 1426 goto prefetch; 1427 } 1428 break; 1429 1430 case MS_OP_ADELAY: 1431 if (mi->arg[0].i) 1432 tsleep(NULL, PPBPRI, "ppbdelay", 1433 mi->arg[0].i * (hz/1000)); 1434 INCR_PC; 1435 break; 1436 1437 case MS_OP_TRIG: 1438 reg = mi->arg[0].i; 1439 iter = mi->arg[1].i; 1440 p = (char *)mi->arg[2].p; 1441 1442 /* XXX delay limited to 255 us */ 1443 for (i=0; i<iter; i++) { 1444 w_reg(reg, ppc, *p++); 1445 DELAY((unsigned char)*p++); 1446 } 1447 INCR_PC; 1448 break; 1449 1450 case MS_OP_SET: 1451 ppc->ppc_accum = mi->arg[0].i; 1452 INCR_PC; 1453 break; 1454 1455 case MS_OP_DBRA: 1456 if (--ppc->ppc_accum > 0) 1457 mi += mi->arg[0].i; 1458 INCR_PC; 1459 break; 1460 1461 case MS_OP_BRSET: 1462 cc = r_str(ppc); 1463 if ((cc & (char)mi->arg[0].i) == (char)mi->arg[0].i) 1464 mi += mi->arg[1].i; 1465 INCR_PC; 1466 break; 1467 1468 case MS_OP_BRCLEAR: 1469 cc = r_str(ppc); 1470 if ((cc & (char)mi->arg[0].i) == 0) 1471 mi += mi->arg[1].i; 1472 INCR_PC; 1473 break; 1474 1475 case MS_OP_BRSTAT: 1476 cc = r_str(ppc); 1477 if ((cc & ((char)mi->arg[0].i | (char)mi->arg[1].i)) == 1478 (char)mi->arg[0].i) 1479 mi += mi->arg[2].i; 1480 INCR_PC; 1481 break; 1482 1483 case MS_OP_C_CALL: 1484 /* 1485 * If the C call returns !0 then end the microseq. 1486 * The current state of ptr is passed to the C function 1487 */ 1488 if ((error = mi->arg[0].f(mi->arg[1].p, ppc->ppc_ptr))) 1489 return (error); 1490 1491 INCR_PC; 1492 break; 1493 1494 case MS_OP_PTR: 1495 ppc->ppc_ptr = (char *)mi->arg[0].p; 1496 INCR_PC; 1497 break; 1498 1499 case MS_OP_CALL: 1500 if (stack) 1501 panic("%s: too much calls", __FUNCTION__); 1502 1503 if (mi->arg[0].p) { 1504 /* store the state of the actual 1505 * microsequence 1506 */ 1507 stack = mi; 1508 1509 /* jump to the new microsequence */ 1510 mi = (struct ppb_microseq *)mi->arg[0].p; 1511 } else 1512 INCR_PC; 1513 1514 break; 1515 1516 case MS_OP_SUBRET: 1517 /* retrieve microseq and pc state before the call */ 1518 mi = stack; 1519 1520 /* reset the stack */ 1521 stack = 0; 1522 1523 /* XXX return code */ 1524 1525 INCR_PC; 1526 break; 1527 1528 case MS_OP_PUT: 1529 case MS_OP_GET: 1530 case MS_OP_RET: 1531 /* can't return to ppb level during the execution 1532 * of a submicrosequence */ 1533 if (stack) 1534 panic("%s: can't return to ppb level", 1535 __FUNCTION__); 1536 1537 /* update pc for ppb level of execution */ 1538 *p_msq = mi; 1539 1540 /* return to ppb level of execution */ 1541 return (0); 1542 1543 default: 1544 panic("%s: unknown microsequence opcode 0x%x", 1545 __FUNCTION__, mi->opcode); 1546 } 1547 } 1548 1549 /* unreached */ 1550} 1551 1552static void 1553ppcintr(void *arg) 1554{ 1555 device_t dev = (device_t)arg; 1556 struct ppc_data *ppc = (struct ppc_data *)device_get_softc(dev); 1557 u_char ctr, ecr, str; 1558 1559 str = r_str(ppc); 1560 ctr = r_ctr(ppc); 1561 ecr = r_ecr(ppc); 1562 1563#if PPC_DEBUG > 1 1564 printf("![%x/%x/%x]", ctr, ecr, str); 1565#endif 1566 1567 /* don't use ecp mode with IRQENABLE set */ 1568 if (ctr & IRQENABLE) { 1569 return; 1570 } 1571 1572 /* interrupts are generated by nFault signal 1573 * only in ECP mode */ 1574 if ((str & nFAULT) && (ppc->ppc_mode & PPB_ECP)) { 1575 /* check if ppc driver has programmed the 1576 * nFault interrupt */ 1577 if (ppc->ppc_irqstat & PPC_IRQ_nFAULT) { 1578 1579 w_ecr(ppc, ecr | PPC_nFAULT_INTR); 1580 ppc->ppc_irqstat &= ~PPC_IRQ_nFAULT; 1581 } else { 1582 /* shall be handled by underlying layers XXX */ 1583 return; 1584 } 1585 } 1586 1587 if (ppc->ppc_irqstat & PPC_IRQ_DMA) { 1588 /* disable interrupts (should be done by hardware though) */ 1589 w_ecr(ppc, ecr | PPC_SERVICE_INTR); 1590 ppc->ppc_irqstat &= ~PPC_IRQ_DMA; 1591 ecr = r_ecr(ppc); 1592 1593 /* check if DMA completed */ 1594 if ((ppc->ppc_avm & PPB_ECP) && (ecr & PPC_ENABLE_DMA)) { 1595#ifdef PPC_DEBUG 1596 printf("a"); 1597#endif 1598 /* stop DMA */ 1599 w_ecr(ppc, ecr & ~PPC_ENABLE_DMA); 1600 ecr = r_ecr(ppc); 1601 1602 if (ppc->ppc_dmastat == PPC_DMA_STARTED) { 1603#ifdef PPC_DEBUG 1604 printf("d"); 1605#endif 1606 isa_dmadone( 1607 ppc->ppc_dmaflags, 1608 ppc->ppc_dmaddr, 1609 ppc->ppc_dmacnt, 1610 ppc->ppc_dmachan); 1611 1612 ppc->ppc_dmastat = PPC_DMA_COMPLETE; 1613 1614 /* wakeup the waiting process */ 1615 wakeup((caddr_t)ppc); 1616 } 1617 } 1618 } else if (ppc->ppc_irqstat & PPC_IRQ_FIFO) { 1619 1620 /* classic interrupt I/O */ 1621 ppc->ppc_irqstat &= ~PPC_IRQ_FIFO; 1622 } 1623 1624 return; 1625} 1626 1627static int 1628ppc_read(device_t dev, char *buf, int len, int mode) 1629{ 1630 return (EINVAL); 1631} 1632 1633/* 1634 * Call this function if you want to send data in any advanced mode 1635 * of your parallel port: FIFO, DMA 1636 * 1637 * If what you want is not possible (no ECP, no DMA...), 1638 * EINVAL is returned 1639 */ 1640static int 1641ppc_write(device_t dev, char *buf, int len, int how) 1642{ 1643 struct ppc_data *ppc = DEVTOSOFTC(dev); 1644 char ecr, ecr_sav, ctr, ctr_sav; 1645 int s, error = 0; 1646 int spin; 1647 1648#ifdef PPC_DEBUG 1649 printf("w"); 1650#endif 1651 1652 ecr_sav = r_ecr(ppc); 1653 ctr_sav = r_ctr(ppc); 1654 1655 /* 1656 * Send buffer with DMA, FIFO and interrupts 1657 */ 1658 if ((ppc->ppc_avm & PPB_ECP) && (ppc->ppc_registered)) { 1659 1660 if (ppc->ppc_dmachan > 0) { 1661 1662 /* byte mode, no intr, no DMA, dir=0, flush fifo 1663 */ 1664 ecr = PPC_ECR_STD | PPC_DISABLE_INTR; 1665 w_ecr(ppc, ecr); 1666 1667 /* disable nAck interrupts */ 1668 ctr = r_ctr(ppc); 1669 ctr &= ~IRQENABLE; 1670 w_ctr(ppc, ctr); 1671 1672 ppc->ppc_dmaflags = 0; 1673 ppc->ppc_dmaddr = (caddr_t)buf; 1674 ppc->ppc_dmacnt = (u_int)len; 1675 1676 switch (ppc->ppc_mode) { 1677 case PPB_COMPATIBLE: 1678 /* compatible mode with FIFO, no intr, DMA, dir=0 */ 1679 ecr = PPC_ECR_FIFO | PPC_DISABLE_INTR | PPC_ENABLE_DMA; 1680 break; 1681 case PPB_ECP: 1682 ecr = PPC_ECR_ECP | PPC_DISABLE_INTR | PPC_ENABLE_DMA; 1683 break; 1684 default: 1685 error = EINVAL; 1686 goto error; 1687 } 1688 1689 w_ecr(ppc, ecr); 1690 ecr = r_ecr(ppc); 1691 1692 /* enter splhigh() not to be preempted 1693 * by the dma interrupt, we may miss 1694 * the wakeup otherwise 1695 */ 1696 s = splhigh(); 1697 1698 ppc->ppc_dmastat = PPC_DMA_INIT; 1699 1700 /* enable interrupts */ 1701 ecr &= ~PPC_SERVICE_INTR; 1702 ppc->ppc_irqstat = PPC_IRQ_DMA; 1703 w_ecr(ppc, ecr); 1704 1705 isa_dmastart( 1706 ppc->ppc_dmaflags, 1707 ppc->ppc_dmaddr, 1708 ppc->ppc_dmacnt, 1709 ppc->ppc_dmachan); 1710#ifdef PPC_DEBUG 1711 printf("s%d", ppc->ppc_dmacnt); 1712#endif 1713 ppc->ppc_dmastat = PPC_DMA_STARTED; 1714 1715 /* Wait for the DMA completed interrupt. We hope we won't 1716 * miss it, otherwise a signal will be necessary to unlock the 1717 * process. 1718 */ 1719 do { 1720 /* release CPU */ 1721 error = tsleep((caddr_t)ppc, 1722 PPBPRI | PCATCH, "ppcdma", 0); 1723 1724 } while (error == EWOULDBLOCK); 1725 1726 splx(s); 1727 1728 if (error) { 1729#ifdef PPC_DEBUG 1730 printf("i"); 1731#endif 1732 /* stop DMA */ 1733 isa_dmadone( 1734 ppc->ppc_dmaflags, ppc->ppc_dmaddr, 1735 ppc->ppc_dmacnt, ppc->ppc_dmachan); 1736 1737 /* no dma, no interrupt, flush the fifo */ 1738 w_ecr(ppc, PPC_ECR_RESET); 1739 1740 ppc->ppc_dmastat = PPC_DMA_INTERRUPTED; 1741 goto error; 1742 } 1743 1744 /* wait for an empty fifo */ 1745 while (!(r_ecr(ppc) & PPC_FIFO_EMPTY)) { 1746 1747 for (spin=100; spin; spin--) 1748 if (r_ecr(ppc) & PPC_FIFO_EMPTY) 1749 goto fifo_empty; 1750#ifdef PPC_DEBUG 1751 printf("Z"); 1752#endif 1753 error = tsleep((caddr_t)ppc, PPBPRI | PCATCH, "ppcfifo", hz/100); 1754 if (error != EWOULDBLOCK) { 1755#ifdef PPC_DEBUG 1756 printf("I"); 1757#endif 1758 /* no dma, no interrupt, flush the fifo */ 1759 w_ecr(ppc, PPC_ECR_RESET); 1760 1761 ppc->ppc_dmastat = PPC_DMA_INTERRUPTED; 1762 error = EINTR; 1763 goto error; 1764 } 1765 } 1766 1767fifo_empty: 1768 /* no dma, no interrupt, flush the fifo */ 1769 w_ecr(ppc, PPC_ECR_RESET); 1770 1771 } else 1772 error = EINVAL; /* XXX we should FIFO and 1773 * interrupts */ 1774 } else 1775 error = EINVAL; 1776 1777error: 1778 1779 /* PDRQ must be kept unasserted until nPDACK is 1780 * deasserted for a minimum of 350ns (SMC datasheet) 1781 * 1782 * Consequence may be a FIFO that never empty 1783 */ 1784 DELAY(1); 1785 1786 w_ecr(ppc, ecr_sav); 1787 w_ctr(ppc, ctr_sav); 1788 1789 return (error); 1790} 1791 1792static void 1793ppc_reset_epp(device_t dev) 1794{ 1795 struct ppc_data *ppc = DEVTOSOFTC(dev); 1796 1797 ppc_reset_epp_timeout(ppc); 1798 1799 return; 1800} 1801 1802static int 1803ppc_setmode(device_t dev, int mode) 1804{ 1805 struct ppc_data *ppc = DEVTOSOFTC(dev); 1806 1807 switch (ppc->ppc_type) { 1808 case PPC_TYPE_SMCLIKE: 1809 return (ppc_smclike_setmode(ppc, mode)); 1810 break; 1811 1812 case PPC_TYPE_GENERIC: 1813 default: 1814 return (ppc_generic_setmode(ppc, mode)); 1815 break; 1816 } 1817 1818 /* not reached */ 1819 return (ENXIO); 1820} 1821 1822static struct isa_pnp_id lpc_ids[] = { 1823 { 0x0004d041, "Standard parallel printer port" }, /* PNP0400 */ 1824 { 0x0104d041, "ECP parallel printer port" }, /* PNP0401 */ 1825 { 0 } 1826}; 1827 1828static int 1829ppc_probe(device_t dev) 1830{ 1831#ifdef __i386__ 1832 static short next_bios_ppc = 0; 1833#endif 1834 struct ppc_data *ppc; 1835 device_t parent; 1836 int error; 1837 u_long port; 1838 1839 parent = device_get_parent(dev); 1840 1841 error = ISA_PNP_PROBE(parent, dev, lpc_ids); 1842 if (error == ENXIO) 1843 return (ENXIO); 1844 else if (error != 0) /* XXX shall be set after detection */ 1845 device_set_desc(dev, "Parallel port"); 1846 1847 /* 1848 * Allocate the ppc_data structure. 1849 */ 1850 ppc = DEVTOSOFTC(dev); 1851 bzero(ppc, sizeof(struct ppc_data)); 1852 1853 ppc->rid_irq = ppc->rid_drq = ppc->rid_ioport = 0; 1854 ppc->res_irq = ppc->res_drq = ppc->res_ioport = 0; 1855 1856 /* retrieve ISA parameters */ 1857 error = bus_get_resource(dev, SYS_RES_IOPORT, 0, &port, NULL); 1858 1859#ifdef __i386__ 1860 /* 1861 * If port not specified, use bios list. 1862 */ 1863 if (error) { 1864 if((next_bios_ppc < BIOS_MAX_PPC) && 1865 (*(BIOS_PORTS+next_bios_ppc) != 0) ) { 1866 port = *(BIOS_PORTS+next_bios_ppc++); 1867 if (bootverbose) 1868 device_printf(dev, "parallel port found at 0x%x\n", 1869 (int) port); 1870 } else { 1871 device_printf(dev, "parallel port not found.\n"); 1872 return ENXIO; 1873 } 1874 bus_set_resource(dev, SYS_RES_IOPORT, 0, port, 1875 IO_LPTSIZE_EXTENDED); 1876 } 1877#endif 1878#ifdef __alpha__ 1879 /* 1880 * There isn't a bios list on alpha. Put it in the usual place. 1881 */ 1882 if (error) { 1883 bus_set_resource(dev, SYS_RES_IOPORT, 0, 0x3bc, 1884 IO_LPTSIZE_NORMAL); 1885 } 1886#endif 1887 1888 /* IO port is mandatory */ 1889 1890 /* Try "extended" IO port range...*/ 1891 ppc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 1892 &ppc->rid_ioport, 0, ~0, 1893 IO_LPTSIZE_EXTENDED, RF_ACTIVE); 1894 1895 if (ppc->res_ioport != 0) { 1896 if (bootverbose) 1897 device_printf(dev, "using extended I/O port range\n"); 1898 } else { 1899 /* Failed? If so, then try the "normal" IO port range... */ 1900 ppc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 1901 &ppc->rid_ioport, 0, ~0, 1902 IO_LPTSIZE_NORMAL, 1903 RF_ACTIVE); 1904 if (ppc->res_ioport != 0) { 1905 if (bootverbose) 1906 device_printf(dev, "using normal I/O port range\n"); 1907 } else { 1908 device_printf(dev, "cannot reserve I/O port range\n"); 1909 goto error; 1910 } 1911 } 1912 1913 ppc->ppc_base = rman_get_start(ppc->res_ioport); 1914 1915 ppc->ppc_flags = device_get_flags(dev); 1916 1917 if (!(ppc->ppc_flags & 0x20)) { 1918 ppc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &ppc->rid_irq, 1919 0ul, ~0ul, 1, RF_SHAREABLE); 1920 ppc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, &ppc->rid_drq, 1921 0ul, ~0ul, 1, RF_ACTIVE); 1922 } 1923 1924 if (ppc->res_irq) 1925 ppc->ppc_irq = rman_get_start(ppc->res_irq); 1926 if (ppc->res_drq) 1927 ppc->ppc_dmachan = rman_get_start(ppc->res_drq); 1928 1929 ppc->ppc_unit = device_get_unit(dev); 1930 ppc->ppc_model = GENERIC; 1931 1932 ppc->ppc_mode = PPB_COMPATIBLE; 1933 ppc->ppc_epp = (ppc->ppc_flags & 0x10) >> 4; 1934 1935 ppc->ppc_type = PPC_TYPE_GENERIC; 1936 1937 /* 1938 * Try to detect the chipset and its mode. 1939 */ 1940 if (ppc_detect(ppc, ppc->ppc_flags & 0xf)) 1941 goto error; 1942 1943 return (0); 1944 1945error: 1946 if (ppc->res_irq != 0) { 1947 bus_release_resource(dev, SYS_RES_IRQ, ppc->rid_irq, 1948 ppc->res_irq); 1949 } 1950 if (ppc->res_ioport != 0) { 1951 bus_deactivate_resource(dev, SYS_RES_IOPORT, ppc->rid_ioport, 1952 ppc->res_ioport); 1953 bus_release_resource(dev, SYS_RES_IOPORT, ppc->rid_ioport, 1954 ppc->res_ioport); 1955 } 1956 if (ppc->res_drq != 0) { 1957 bus_deactivate_resource(dev, SYS_RES_DRQ, ppc->rid_drq, 1958 ppc->res_drq); 1959 bus_release_resource(dev, SYS_RES_DRQ, ppc->rid_drq, 1960 ppc->res_drq); 1961 } 1962 return (ENXIO); 1963} 1964 1965static int 1966ppc_attach(device_t dev) 1967{ 1968 struct ppc_data *ppc = DEVTOSOFTC(dev); 1969 1970 device_t ppbus; 1971 device_t parent = device_get_parent(dev); 1972 1973 device_printf(dev, "%s chipset (%s) in %s mode%s\n", 1974 ppc_models[ppc->ppc_model], ppc_avms[ppc->ppc_avm], 1975 ppc_modes[ppc->ppc_mode], (PPB_IS_EPP(ppc->ppc_mode)) ? 1976 ppc_epp_protocol[ppc->ppc_epp] : ""); 1977 1978 if (ppc->ppc_fifo) 1979 device_printf(dev, "FIFO with %d/%d/%d bytes threshold\n", 1980 ppc->ppc_fifo, ppc->ppc_wthr, ppc->ppc_rthr); 1981 1982 if ((ppc->ppc_avm & PPB_ECP) && (ppc->ppc_dmachan > 0)) { 1983 /* acquire the DMA channel forever */ /* XXX */ 1984 isa_dma_acquire(ppc->ppc_dmachan); 1985 isa_dmainit(ppc->ppc_dmachan, 1024); /* nlpt.BUFSIZE */ 1986 } 1987 1988 /* add ppbus as a child of this isa to parallel bridge */ 1989 ppbus = device_add_child(dev, "ppbus", -1); 1990 1991 /* 1992 * Probe the ppbus and attach devices found. 1993 */ 1994 device_probe_and_attach(ppbus); 1995 1996 /* register the ppc interrupt handler as default */ 1997 if (ppc->res_irq) { 1998 /* default to the tty mask for registration */ /* XXX */ 1999 if (BUS_SETUP_INTR(parent, dev, ppc->res_irq, INTR_TYPE_TTY, 2000 ppcintr, dev, &ppc->intr_cookie) == 0) { 2001 2002 /* remember the ppcintr is registered */ 2003 ppc->ppc_registered = 1; 2004 } 2005 } 2006 2007 return (0); 2008} 2009 2010static u_char 2011ppc_io(device_t ppcdev, int iop, u_char *addr, int cnt, u_char byte) 2012{ 2013 struct ppc_data *ppc = DEVTOSOFTC(ppcdev); 2014 switch (iop) { 2015 case PPB_OUTSB_EPP: 2016 outsb(ppc->ppc_base + PPC_EPP_DATA, addr, cnt); 2017 break; 2018 case PPB_OUTSW_EPP: 2019 outsw(ppc->ppc_base + PPC_EPP_DATA, addr, cnt); 2020 break; 2021 case PPB_OUTSL_EPP: 2022 outsl(ppc->ppc_base + PPC_EPP_DATA, addr, cnt); 2023 break; 2024 case PPB_INSB_EPP: 2025 insb(ppc->ppc_base + PPC_EPP_DATA, addr, cnt); 2026 break; 2027 case PPB_INSW_EPP: 2028 insw(ppc->ppc_base + PPC_EPP_DATA, addr, cnt); 2029 break; 2030 case PPB_INSL_EPP: 2031 insl(ppc->ppc_base + PPC_EPP_DATA, addr, cnt); 2032 break; 2033 case PPB_RDTR: 2034 return (r_dtr(ppc)); 2035 break; 2036 case PPB_RSTR: 2037 return (r_str(ppc)); 2038 break; 2039 case PPB_RCTR: 2040 return (r_ctr(ppc)); 2041 break; 2042 case PPB_REPP_A: 2043 return (r_epp_A(ppc)); 2044 break; 2045 case PPB_REPP_D: 2046 return (r_epp_D(ppc)); 2047 break; 2048 case PPB_RECR: 2049 return (r_ecr(ppc)); 2050 break; 2051 case PPB_RFIFO: 2052 return (r_fifo(ppc)); 2053 break; 2054 case PPB_WDTR: 2055 w_dtr(ppc, byte); 2056 break; 2057 case PPB_WSTR: 2058 w_str(ppc, byte); 2059 break; 2060 case PPB_WCTR: 2061 w_ctr(ppc, byte); 2062 break; 2063 case PPB_WEPP_A: 2064 w_epp_A(ppc, byte); 2065 break; 2066 case PPB_WEPP_D: 2067 w_epp_D(ppc, byte); 2068 break; 2069 case PPB_WECR: 2070 w_ecr(ppc, byte); 2071 break; 2072 case PPB_WFIFO: 2073 w_fifo(ppc, byte); 2074 break; 2075 default: 2076 panic("%s: unknown I/O operation", __FUNCTION__); 2077 break; 2078 } 2079 2080 return (0); /* not significative */ 2081} 2082 2083static int 2084ppc_read_ivar(device_t bus, device_t dev, int index, uintptr_t *val) 2085{ 2086 struct ppc_data *ppc = (struct ppc_data *)device_get_softc(bus); 2087 2088 switch (index) { 2089 case PPC_IVAR_EPP_PROTO: 2090 *val = (u_long)ppc->ppc_epp; 2091 break; 2092 case PPC_IVAR_IRQ: 2093 *val = (u_long)ppc->ppc_irq; 2094 break; 2095 default: 2096 return (ENOENT); 2097 } 2098 2099 return (0); 2100} 2101 2102/* 2103 * Resource is useless here since ppbus devices' interrupt handlers are 2104 * multiplexed to the same resource initially allocated by ppc 2105 */ 2106static int 2107ppc_setup_intr(device_t bus, device_t child, struct resource *r, int flags, 2108 void (*ihand)(void *), void *arg, void **cookiep) 2109{ 2110 int error; 2111 struct ppc_data *ppc = DEVTOSOFTC(bus); 2112 2113 if (ppc->ppc_registered) { 2114 /* XXX refuse registration if DMA is in progress */ 2115 2116 /* first, unregister the default interrupt handler */ 2117 if ((error = BUS_TEARDOWN_INTR(device_get_parent(bus), 2118 bus, ppc->res_irq, ppc->intr_cookie))) 2119 return (error); 2120 2121/* bus_deactivate_resource(bus, SYS_RES_IRQ, ppc->rid_irq, */ 2122/* ppc->res_irq); */ 2123 2124 /* DMA/FIFO operation won't be possible anymore */ 2125 ppc->ppc_registered = 0; 2126 } 2127 2128 /* pass registration to the upper layer, ignore the incoming resource */ 2129 return (BUS_SETUP_INTR(device_get_parent(bus), child, 2130 r, flags, ihand, arg, cookiep)); 2131} 2132 2133/* 2134 * When no underlying device has a registered interrupt, register the ppc 2135 * layer one 2136 */ 2137static int 2138ppc_teardown_intr(device_t bus, device_t child, struct resource *r, void *ih) 2139{ 2140 int error; 2141 struct ppc_data *ppc = DEVTOSOFTC(bus); 2142 device_t parent = device_get_parent(bus); 2143 2144 /* pass unregistration to the upper layer */ 2145 if ((error = BUS_TEARDOWN_INTR(parent, child, r, ih))) 2146 return (error); 2147 2148 /* default to the tty mask for registration */ /* XXX */ 2149 if (ppc->ppc_irq && 2150 !(error = BUS_SETUP_INTR(parent, bus, ppc->res_irq, 2151 INTR_TYPE_TTY, ppcintr, bus, &ppc->intr_cookie))) { 2152 2153 /* remember the ppcintr is registered */ 2154 ppc->ppc_registered = 1; 2155 } 2156 2157 return (error); 2158} 2159 2160DRIVER_MODULE(ppc, isa, ppc_driver, ppc_devclass, 0, 0); 2161