1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * ISA Plug & Play support 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 5 * 6 * Changelog: 7 * 2000-01-01 Added quirks handling for buggy hardware 8 * Peter Denison <peterd@pnd-pc.demon.co.uk> 9 * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev() 10 * Christoph Hellwig <hch@infradead.org> 11 * 2001-06-03 Added release_region calls to correspond with 12 * request_region calls when a failure occurs. Also 13 * added KERN_* constants to printk() calls. 14 * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines 15 * of the pci driver interface 16 * Kai Germaschewski <kai.germaschewski@gmx.de> 17 * 2002-06-06 Made the use of dma channel 0 configurable 18 * Gerald Teschl <gerald.teschl@univie.ac.at> 19 * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com> 20 * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com> 21 */ 22 23#include <linux/moduleparam.h> 24#include <linux/kernel.h> 25#include <linux/errno.h> 26#include <linux/delay.h> 27#include <linux/init.h> 28#include <linux/isapnp.h> 29#include <linux/mutex.h> 30#include <asm/io.h> 31 32#include "../base.h" 33 34#if 0 35#define ISAPNP_REGION_OK 36#endif 37 38int isapnp_disable; /* Disable ISA PnP */ 39static int isapnp_rdp; /* Read Data Port */ 40static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */ 41static int isapnp_verbose = 1; /* verbose mode */ 42 43module_param(isapnp_disable, int, 0); 44MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable"); 45module_param(isapnp_rdp, int, 0); 46MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port"); 47module_param(isapnp_reset, int, 0); 48MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards"); 49module_param(isapnp_verbose, int, 0); 50MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode"); 51 52#define _PIDXR 0x279 53#define _PNPWRP 0xa79 54 55/* short tags */ 56#define _STAG_PNPVERNO 0x01 57#define _STAG_LOGDEVID 0x02 58#define _STAG_COMPATDEVID 0x03 59#define _STAG_IRQ 0x04 60#define _STAG_DMA 0x05 61#define _STAG_STARTDEP 0x06 62#define _STAG_ENDDEP 0x07 63#define _STAG_IOPORT 0x08 64#define _STAG_FIXEDIO 0x09 65#define _STAG_VENDOR 0x0e 66#define _STAG_END 0x0f 67/* long tags */ 68#define _LTAG_MEMRANGE 0x81 69#define _LTAG_ANSISTR 0x82 70#define _LTAG_UNICODESTR 0x83 71#define _LTAG_VENDOR 0x84 72#define _LTAG_MEM32RANGE 0x85 73#define _LTAG_FIXEDMEM32RANGE 0x86 74 75/* Logical device control and configuration registers */ 76 77#define ISAPNP_CFG_ACTIVATE 0x30 /* byte */ 78#define ISAPNP_CFG_MEM 0x40 /* 4 * dword */ 79#define ISAPNP_CFG_PORT 0x60 /* 8 * word */ 80#define ISAPNP_CFG_IRQ 0x70 /* 2 * word */ 81#define ISAPNP_CFG_DMA 0x74 /* 2 * byte */ 82 83/* 84 * Sizes of ISAPNP logical device configuration register sets. 85 * See PNP-ISA-v1.0a.pdf, Appendix A. 86 */ 87#define ISAPNP_MAX_MEM 4 88#define ISAPNP_MAX_PORT 8 89#define ISAPNP_MAX_IRQ 2 90#define ISAPNP_MAX_DMA 2 91 92static unsigned char isapnp_checksum_value; 93static DEFINE_MUTEX(isapnp_cfg_mutex); 94static int isapnp_csn_count; 95 96/* some prototypes */ 97 98static inline void write_data(unsigned char x) 99{ 100 outb(x, _PNPWRP); 101} 102 103static inline void write_address(unsigned char x) 104{ 105 outb(x, _PIDXR); 106 udelay(20); 107} 108 109static inline unsigned char read_data(void) 110{ 111 unsigned char val = inb(isapnp_rdp); 112 return val; 113} 114 115unsigned char isapnp_read_byte(unsigned char idx) 116{ 117 write_address(idx); 118 return read_data(); 119} 120 121static unsigned short isapnp_read_word(unsigned char idx) 122{ 123 unsigned short val; 124 125 val = isapnp_read_byte(idx); 126 val = (val << 8) + isapnp_read_byte(idx + 1); 127 return val; 128} 129 130void isapnp_write_byte(unsigned char idx, unsigned char val) 131{ 132 write_address(idx); 133 write_data(val); 134} 135 136static void isapnp_write_word(unsigned char idx, unsigned short val) 137{ 138 isapnp_write_byte(idx, val >> 8); 139 isapnp_write_byte(idx + 1, val); 140} 141 142static void isapnp_key(void) 143{ 144 unsigned char code = 0x6a, msb; 145 int i; 146 147 mdelay(1); 148 write_address(0x00); 149 write_address(0x00); 150 151 write_address(code); 152 153 for (i = 1; i < 32; i++) { 154 msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7; 155 code = (code >> 1) | msb; 156 write_address(code); 157 } 158} 159 160/* place all pnp cards in wait-for-key state */ 161static void isapnp_wait(void) 162{ 163 isapnp_write_byte(0x02, 0x02); 164} 165 166static void isapnp_wake(unsigned char csn) 167{ 168 isapnp_write_byte(0x03, csn); 169} 170 171static void isapnp_device(unsigned char logdev) 172{ 173 isapnp_write_byte(0x07, logdev); 174} 175 176static void isapnp_activate(unsigned char logdev) 177{ 178 isapnp_device(logdev); 179 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1); 180 udelay(250); 181} 182 183static void isapnp_deactivate(unsigned char logdev) 184{ 185 isapnp_device(logdev); 186 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0); 187 udelay(500); 188} 189 190static void __init isapnp_peek(unsigned char *data, int bytes) 191{ 192 int i, j; 193 unsigned char d = 0; 194 195 for (i = 1; i <= bytes; i++) { 196 for (j = 0; j < 20; j++) { 197 d = isapnp_read_byte(0x05); 198 if (d & 1) 199 break; 200 udelay(100); 201 } 202 if (!(d & 1)) { 203 if (data != NULL) 204 *data++ = 0xff; 205 continue; 206 } 207 d = isapnp_read_byte(0x04); /* PRESDI */ 208 isapnp_checksum_value += d; 209 if (data != NULL) 210 *data++ = d; 211 } 212} 213 214#define RDP_STEP 32 /* minimum is 4 */ 215 216static int isapnp_next_rdp(void) 217{ 218 int rdp = isapnp_rdp; 219 static int old_rdp = 0; 220 221 if (old_rdp) { 222 release_region(old_rdp, 1); 223 old_rdp = 0; 224 } 225 while (rdp <= 0x3ff) { 226 /* 227 * We cannot use NE2000 probe spaces for ISAPnP or we 228 * will lock up machines. 229 */ 230 if ((rdp < 0x280 || rdp > 0x380) 231 && request_region(rdp, 1, "ISAPnP")) { 232 isapnp_rdp = rdp; 233 old_rdp = rdp; 234 return 0; 235 } 236 rdp += RDP_STEP; 237 } 238 return -1; 239} 240 241/* Set read port address */ 242static inline void isapnp_set_rdp(void) 243{ 244 isapnp_write_byte(0x00, isapnp_rdp >> 2); 245 udelay(100); 246} 247 248/* 249 * Perform an isolation. The port selection code now tries to avoid 250 * "dangerous to read" ports. 251 */ 252static int __init isapnp_isolate_rdp_select(void) 253{ 254 isapnp_wait(); 255 isapnp_key(); 256 257 /* Control: reset CSN and conditionally everything else too */ 258 isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04); 259 mdelay(2); 260 261 isapnp_wait(); 262 isapnp_key(); 263 isapnp_wake(0x00); 264 265 if (isapnp_next_rdp() < 0) { 266 isapnp_wait(); 267 return -1; 268 } 269 270 isapnp_set_rdp(); 271 udelay(1000); 272 write_address(0x01); 273 udelay(1000); 274 return 0; 275} 276 277/* 278 * Isolate (assign uniqued CSN) to all ISA PnP devices. 279 */ 280static int __init isapnp_isolate(void) 281{ 282 unsigned char checksum = 0x6a; 283 unsigned char chksum = 0x00; 284 unsigned char bit = 0x00; 285 int data; 286 int csn = 0; 287 int i; 288 int iteration = 1; 289 290 isapnp_rdp = 0x213; 291 if (isapnp_isolate_rdp_select() < 0) 292 return -1; 293 294 while (1) { 295 for (i = 1; i <= 64; i++) { 296 data = read_data() << 8; 297 udelay(250); 298 data = data | read_data(); 299 udelay(250); 300 if (data == 0x55aa) 301 bit = 0x01; 302 checksum = 303 ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) 304 | (checksum >> 1); 305 bit = 0x00; 306 } 307 for (i = 65; i <= 72; i++) { 308 data = read_data() << 8; 309 udelay(250); 310 data = data | read_data(); 311 udelay(250); 312 if (data == 0x55aa) 313 chksum |= (1 << (i - 65)); 314 } 315 if (checksum != 0x00 && checksum == chksum) { 316 csn++; 317 318 isapnp_write_byte(0x06, csn); 319 udelay(250); 320 iteration++; 321 isapnp_wake(0x00); 322 isapnp_set_rdp(); 323 udelay(1000); 324 write_address(0x01); 325 udelay(1000); 326 goto __next; 327 } 328 if (iteration == 1) { 329 isapnp_rdp += RDP_STEP; 330 if (isapnp_isolate_rdp_select() < 0) 331 return -1; 332 } else if (iteration > 1) { 333 break; 334 } 335__next: 336 if (csn == 255) 337 break; 338 checksum = 0x6a; 339 chksum = 0x00; 340 bit = 0x00; 341 } 342 isapnp_wait(); 343 isapnp_csn_count = csn; 344 return csn; 345} 346 347/* 348 * Read one tag from stream. 349 */ 350static int __init isapnp_read_tag(unsigned char *type, unsigned short *size) 351{ 352 unsigned char tag, tmp[2]; 353 354 isapnp_peek(&tag, 1); 355 if (tag == 0) /* invalid tag */ 356 return -1; 357 if (tag & 0x80) { /* large item */ 358 *type = tag; 359 isapnp_peek(tmp, 2); 360 *size = (tmp[1] << 8) | tmp[0]; 361 } else { 362 *type = (tag >> 3) & 0x0f; 363 *size = tag & 0x07; 364 } 365 if (*type == 0xff && *size == 0xffff) /* probably invalid data */ 366 return -1; 367 return 0; 368} 369 370/* 371 * Skip specified number of bytes from stream. 372 */ 373static void __init isapnp_skip_bytes(int count) 374{ 375 isapnp_peek(NULL, count); 376} 377 378/* 379 * Parse logical device tag. 380 */ 381static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card, 382 int size, int number) 383{ 384 unsigned char tmp[6]; 385 struct pnp_dev *dev; 386 u32 eisa_id; 387 char id[8]; 388 389 isapnp_peek(tmp, size); 390 eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24; 391 pnp_eisa_id_to_string(eisa_id, id); 392 393 dev = pnp_alloc_dev(&isapnp_protocol, number, id); 394 if (!dev) 395 return NULL; 396 397 dev->card = card; 398 dev->capabilities |= PNP_CONFIGURABLE; 399 dev->capabilities |= PNP_READ; 400 dev->capabilities |= PNP_WRITE; 401 dev->capabilities |= PNP_DISABLE; 402 pnp_init_resources(dev); 403 return dev; 404} 405 406/* 407 * Add IRQ resource to resources list. 408 */ 409static void __init isapnp_parse_irq_resource(struct pnp_dev *dev, 410 unsigned int option_flags, 411 int size) 412{ 413 unsigned char tmp[3]; 414 unsigned long bits; 415 pnp_irq_mask_t map; 416 unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; 417 418 isapnp_peek(tmp, size); 419 bits = (tmp[1] << 8) | tmp[0]; 420 421 bitmap_zero(map.bits, PNP_IRQ_NR); 422 bitmap_copy(map.bits, &bits, 16); 423 424 if (size > 2) 425 flags = tmp[2]; 426 427 pnp_register_irq_resource(dev, option_flags, &map, flags); 428} 429 430/* 431 * Add DMA resource to resources list. 432 */ 433static void __init isapnp_parse_dma_resource(struct pnp_dev *dev, 434 unsigned int option_flags, 435 int size) 436{ 437 unsigned char tmp[2]; 438 439 isapnp_peek(tmp, size); 440 pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]); 441} 442 443/* 444 * Add port resource to resources list. 445 */ 446static void __init isapnp_parse_port_resource(struct pnp_dev *dev, 447 unsigned int option_flags, 448 int size) 449{ 450 unsigned char tmp[7]; 451 resource_size_t min, max, align, len; 452 unsigned char flags; 453 454 isapnp_peek(tmp, size); 455 min = (tmp[2] << 8) | tmp[1]; 456 max = (tmp[4] << 8) | tmp[3]; 457 align = tmp[5]; 458 len = tmp[6]; 459 flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0; 460 pnp_register_port_resource(dev, option_flags, 461 min, max, align, len, flags); 462} 463 464/* 465 * Add fixed port resource to resources list. 466 */ 467static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev, 468 unsigned int option_flags, 469 int size) 470{ 471 unsigned char tmp[3]; 472 resource_size_t base, len; 473 474 isapnp_peek(tmp, size); 475 base = (tmp[1] << 8) | tmp[0]; 476 len = tmp[2]; 477 pnp_register_port_resource(dev, option_flags, base, base, 0, len, 478 IORESOURCE_IO_FIXED); 479} 480 481/* 482 * Add memory resource to resources list. 483 */ 484static void __init isapnp_parse_mem_resource(struct pnp_dev *dev, 485 unsigned int option_flags, 486 int size) 487{ 488 unsigned char tmp[9]; 489 resource_size_t min, max, align, len; 490 unsigned char flags; 491 492 isapnp_peek(tmp, size); 493 min = ((tmp[2] << 8) | tmp[1]) << 8; 494 max = ((tmp[4] << 8) | tmp[3]) << 8; 495 align = (tmp[6] << 8) | tmp[5]; 496 len = ((tmp[8] << 8) | tmp[7]) << 8; 497 flags = tmp[0]; 498 pnp_register_mem_resource(dev, option_flags, 499 min, max, align, len, flags); 500} 501 502/* 503 * Add 32-bit memory resource to resources list. 504 */ 505static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev, 506 unsigned int option_flags, 507 int size) 508{ 509 unsigned char tmp[17]; 510 resource_size_t min, max, align, len; 511 unsigned char flags; 512 513 isapnp_peek(tmp, size); 514 min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; 515 max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; 516 align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; 517 len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; 518 flags = tmp[0]; 519 pnp_register_mem_resource(dev, option_flags, 520 min, max, align, len, flags); 521} 522 523/* 524 * Add 32-bit fixed memory resource to resources list. 525 */ 526static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev, 527 unsigned int option_flags, 528 int size) 529{ 530 unsigned char tmp[9]; 531 resource_size_t base, len; 532 unsigned char flags; 533 534 isapnp_peek(tmp, size); 535 base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; 536 len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; 537 flags = tmp[0]; 538 pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags); 539} 540 541/* 542 * Parse card name for ISA PnP device. 543 */ 544static void __init 545isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size) 546{ 547 if (name[0] == '\0') { 548 unsigned short size1 = 549 *size >= name_max ? (name_max - 1) : *size; 550 isapnp_peek(name, size1); 551 name[size1] = '\0'; 552 *size -= size1; 553 554 /* clean whitespace from end of string */ 555 while (size1 > 0 && name[--size1] == ' ') 556 name[size1] = '\0'; 557 } 558} 559 560/* 561 * Parse resource map for logical device. 562 */ 563static int __init isapnp_create_device(struct pnp_card *card, 564 unsigned short size) 565{ 566 int number = 0, skip = 0, priority, compat = 0; 567 unsigned char type, tmp[17]; 568 unsigned int option_flags; 569 struct pnp_dev *dev; 570 u32 eisa_id; 571 char id[8]; 572 573 if ((dev = isapnp_parse_device(card, size, number++)) == NULL) 574 return 1; 575 option_flags = 0; 576 pnp_add_card_device(card, dev); 577 578 while (1) { 579 if (isapnp_read_tag(&type, &size) < 0) 580 return 1; 581 if (skip && type != _STAG_LOGDEVID && type != _STAG_END) 582 goto __skip; 583 switch (type) { 584 case _STAG_LOGDEVID: 585 if (size >= 5 && size <= 6) { 586 if ((dev = 587 isapnp_parse_device(card, size, 588 number++)) == NULL) 589 return 1; 590 size = 0; 591 skip = 0; 592 option_flags = 0; 593 pnp_add_card_device(card, dev); 594 } else { 595 skip = 1; 596 } 597 compat = 0; 598 break; 599 case _STAG_COMPATDEVID: 600 if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { 601 isapnp_peek(tmp, 4); 602 eisa_id = tmp[0] | tmp[1] << 8 | 603 tmp[2] << 16 | tmp[3] << 24; 604 pnp_eisa_id_to_string(eisa_id, id); 605 pnp_add_id(dev, id); 606 compat++; 607 size = 0; 608 } 609 break; 610 case _STAG_IRQ: 611 if (size < 2 || size > 3) 612 goto __skip; 613 isapnp_parse_irq_resource(dev, option_flags, size); 614 size = 0; 615 break; 616 case _STAG_DMA: 617 if (size != 2) 618 goto __skip; 619 isapnp_parse_dma_resource(dev, option_flags, size); 620 size = 0; 621 break; 622 case _STAG_STARTDEP: 623 if (size > 1) 624 goto __skip; 625 priority = PNP_RES_PRIORITY_ACCEPTABLE; 626 if (size > 0) { 627 isapnp_peek(tmp, size); 628 priority = tmp[0]; 629 size = 0; 630 } 631 option_flags = pnp_new_dependent_set(dev, priority); 632 break; 633 case _STAG_ENDDEP: 634 if (size != 0) 635 goto __skip; 636 option_flags = 0; 637 break; 638 case _STAG_IOPORT: 639 if (size != 7) 640 goto __skip; 641 isapnp_parse_port_resource(dev, option_flags, size); 642 size = 0; 643 break; 644 case _STAG_FIXEDIO: 645 if (size != 3) 646 goto __skip; 647 isapnp_parse_fixed_port_resource(dev, option_flags, 648 size); 649 size = 0; 650 break; 651 case _STAG_VENDOR: 652 break; 653 case _LTAG_MEMRANGE: 654 if (size != 9) 655 goto __skip; 656 isapnp_parse_mem_resource(dev, option_flags, size); 657 size = 0; 658 break; 659 case _LTAG_ANSISTR: 660 isapnp_parse_name(dev->name, sizeof(dev->name), &size); 661 break; 662 case _LTAG_UNICODESTR: 663 /* silently ignore */ 664 /* who use unicode for hardware identification? */ 665 break; 666 case _LTAG_VENDOR: 667 break; 668 case _LTAG_MEM32RANGE: 669 if (size != 17) 670 goto __skip; 671 isapnp_parse_mem32_resource(dev, option_flags, size); 672 size = 0; 673 break; 674 case _LTAG_FIXEDMEM32RANGE: 675 if (size != 9) 676 goto __skip; 677 isapnp_parse_fixed_mem32_resource(dev, option_flags, 678 size); 679 size = 0; 680 break; 681 case _STAG_END: 682 if (size > 0) 683 isapnp_skip_bytes(size); 684 return 1; 685 default: 686 dev_err(&dev->dev, "unknown tag %#x (card %i), " 687 "ignored\n", type, card->number); 688 } 689__skip: 690 if (size > 0) 691 isapnp_skip_bytes(size); 692 } 693 return 0; 694} 695 696/* 697 * Parse resource map for ISA PnP card. 698 */ 699static void __init isapnp_parse_resource_map(struct pnp_card *card) 700{ 701 unsigned char type, tmp[17]; 702 unsigned short size; 703 704 while (1) { 705 if (isapnp_read_tag(&type, &size) < 0) 706 return; 707 switch (type) { 708 case _STAG_PNPVERNO: 709 if (size != 2) 710 goto __skip; 711 isapnp_peek(tmp, 2); 712 card->pnpver = tmp[0]; 713 card->productver = tmp[1]; 714 size = 0; 715 break; 716 case _STAG_LOGDEVID: 717 if (size >= 5 && size <= 6) { 718 if (isapnp_create_device(card, size) == 1) 719 return; 720 size = 0; 721 } 722 break; 723 case _STAG_VENDOR: 724 break; 725 case _LTAG_ANSISTR: 726 isapnp_parse_name(card->name, sizeof(card->name), 727 &size); 728 break; 729 case _LTAG_UNICODESTR: 730 /* silently ignore */ 731 /* who use unicode for hardware identification? */ 732 break; 733 case _LTAG_VENDOR: 734 break; 735 case _STAG_END: 736 if (size > 0) 737 isapnp_skip_bytes(size); 738 return; 739 default: 740 dev_err(&card->dev, "unknown tag %#x, ignored\n", 741 type); 742 } 743__skip: 744 if (size > 0) 745 isapnp_skip_bytes(size); 746 } 747} 748 749/* 750 * Build device list for all present ISA PnP devices. 751 */ 752static int __init isapnp_build_device_list(void) 753{ 754 int csn; 755 unsigned char header[9]; 756 struct pnp_card *card; 757 u32 eisa_id; 758 char id[8]; 759 760 isapnp_wait(); 761 isapnp_key(); 762 for (csn = 1; csn <= isapnp_csn_count; csn++) { 763 isapnp_wake(csn); 764 isapnp_peek(header, 9); 765 eisa_id = header[0] | header[1] << 8 | 766 header[2] << 16 | header[3] << 24; 767 pnp_eisa_id_to_string(eisa_id, id); 768 card = pnp_alloc_card(&isapnp_protocol, csn, id); 769 if (!card) 770 continue; 771 772 INIT_LIST_HEAD(&card->devices); 773 card->serial = 774 (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | 775 header[4]; 776 isapnp_checksum_value = 0x00; 777 isapnp_parse_resource_map(card); 778 if (isapnp_checksum_value != 0x00) 779 dev_err(&card->dev, "invalid checksum %#x\n", 780 isapnp_checksum_value); 781 card->checksum = isapnp_checksum_value; 782 783 pnp_add_card(card); 784 } 785 isapnp_wait(); 786 return 0; 787} 788 789/* 790 * Basic configuration routines. 791 */ 792 793int isapnp_present(void) 794{ 795 struct pnp_card *card; 796 797 pnp_for_each_card(card) { 798 if (card->protocol == &isapnp_protocol) 799 return 1; 800 } 801 return 0; 802} 803 804int isapnp_cfg_begin(int csn, int logdev) 805{ 806 if (csn < 1 || csn > isapnp_csn_count || logdev > 10) 807 return -EINVAL; 808 mutex_lock(&isapnp_cfg_mutex); 809 isapnp_wait(); 810 isapnp_key(); 811 isapnp_wake(csn); 812#if 0 813 /* to avoid malfunction when the isapnptools package is used */ 814 /* we must set RDP to our value again */ 815 /* it is possible to set RDP only in the isolation phase */ 816 /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */ 817 isapnp_write_byte(0x02, 0x04); /* clear CSN of card */ 818 mdelay(2); /* is this necessary? */ 819 isapnp_wake(csn); /* bring card into sleep state */ 820 isapnp_wake(0); /* bring card into isolation state */ 821 isapnp_set_rdp(); /* reset the RDP port */ 822 udelay(1000); /* delay 1000us */ 823 isapnp_write_byte(0x06, csn); /* reset CSN to previous value */ 824 udelay(250); /* is this necessary? */ 825#endif 826 if (logdev >= 0) 827 isapnp_device(logdev); 828 return 0; 829} 830 831int isapnp_cfg_end(void) 832{ 833 isapnp_wait(); 834 mutex_unlock(&isapnp_cfg_mutex); 835 return 0; 836} 837 838/* 839 * Initialization. 840 */ 841 842EXPORT_SYMBOL(isapnp_protocol); 843EXPORT_SYMBOL(isapnp_present); 844EXPORT_SYMBOL(isapnp_cfg_begin); 845EXPORT_SYMBOL(isapnp_cfg_end); 846EXPORT_SYMBOL(isapnp_write_byte); 847 848static int isapnp_get_resources(struct pnp_dev *dev) 849{ 850 int i, ret; 851 852 pnp_dbg(&dev->dev, "get resources\n"); 853 pnp_init_resources(dev); 854 isapnp_cfg_begin(dev->card->number, dev->number); 855 dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); 856 if (!dev->active) 857 goto __end; 858 859 for (i = 0; i < ISAPNP_MAX_PORT; i++) { 860 ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1)); 861 pnp_add_io_resource(dev, ret, ret, 862 ret == 0 ? IORESOURCE_DISABLED : 0); 863 } 864 for (i = 0; i < ISAPNP_MAX_MEM; i++) { 865 ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8; 866 pnp_add_mem_resource(dev, ret, ret, 867 ret == 0 ? IORESOURCE_DISABLED : 0); 868 } 869 for (i = 0; i < ISAPNP_MAX_IRQ; i++) { 870 ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8; 871 pnp_add_irq_resource(dev, ret, 872 ret == 0 ? IORESOURCE_DISABLED : 0); 873 } 874 for (i = 0; i < ISAPNP_MAX_DMA; i++) { 875 ret = isapnp_read_byte(ISAPNP_CFG_DMA + i); 876 pnp_add_dma_resource(dev, ret, 877 ret == 4 ? IORESOURCE_DISABLED : 0); 878 } 879 880__end: 881 isapnp_cfg_end(); 882 return 0; 883} 884 885static int isapnp_set_resources(struct pnp_dev *dev) 886{ 887 struct resource *res; 888 int tmp; 889 890 pnp_dbg(&dev->dev, "set resources\n"); 891 isapnp_cfg_begin(dev->card->number, dev->number); 892 dev->active = 1; 893 for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) { 894 res = pnp_get_resource(dev, IORESOURCE_IO, tmp); 895 if (pnp_resource_enabled(res)) { 896 pnp_dbg(&dev->dev, " set io %d to %#llx\n", 897 tmp, (unsigned long long) res->start); 898 isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1), 899 res->start); 900 } 901 } 902 for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) { 903 res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp); 904 if (pnp_resource_enabled(res)) { 905 int irq = res->start; 906 if (irq == 2) 907 irq = 9; 908 pnp_dbg(&dev->dev, " set irq %d to %d\n", tmp, irq); 909 isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq); 910 } 911 } 912 for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) { 913 res = pnp_get_resource(dev, IORESOURCE_DMA, tmp); 914 if (pnp_resource_enabled(res)) { 915 pnp_dbg(&dev->dev, " set dma %d to %lld\n", 916 tmp, (unsigned long long) res->start); 917 isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start); 918 } 919 } 920 for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) { 921 res = pnp_get_resource(dev, IORESOURCE_MEM, tmp); 922 if (pnp_resource_enabled(res)) { 923 pnp_dbg(&dev->dev, " set mem %d to %#llx\n", 924 tmp, (unsigned long long) res->start); 925 isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3), 926 (res->start >> 8) & 0xffff); 927 } 928 } 929 /* FIXME: We aren't handling 32bit mems properly here */ 930 isapnp_activate(dev->number); 931 isapnp_cfg_end(); 932 return 0; 933} 934 935static int isapnp_disable_resources(struct pnp_dev *dev) 936{ 937 if (!dev->active) 938 return -EINVAL; 939 isapnp_cfg_begin(dev->card->number, dev->number); 940 isapnp_deactivate(dev->number); 941 dev->active = 0; 942 isapnp_cfg_end(); 943 return 0; 944} 945 946struct pnp_protocol isapnp_protocol = { 947 .name = "ISA Plug and Play", 948 .get = isapnp_get_resources, 949 .set = isapnp_set_resources, 950 .disable = isapnp_disable_resources, 951}; 952 953static int __init isapnp_init(void) 954{ 955 int cards; 956 struct pnp_card *card; 957 struct pnp_dev *dev; 958 959 if (isapnp_disable) { 960 printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); 961 return 0; 962 } 963#ifdef CONFIG_PPC 964 if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP)) 965 return -EINVAL; 966#endif 967#ifdef ISAPNP_REGION_OK 968 if (!request_region(_PIDXR, 1, "isapnp index")) { 969 printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", 970 _PIDXR); 971 return -EBUSY; 972 } 973#endif 974 if (!request_region(_PNPWRP, 1, "isapnp write")) { 975 printk(KERN_ERR 976 "isapnp: Write Data Register 0x%x already used\n", 977 _PNPWRP); 978#ifdef ISAPNP_REGION_OK 979 release_region(_PIDXR, 1); 980#endif 981 return -EBUSY; 982 } 983 984 if (pnp_register_protocol(&isapnp_protocol) < 0) 985 return -EBUSY; 986 987 /* 988 * Print a message. The existing ISAPnP code is hanging machines 989 * so let the user know where. 990 */ 991 992 printk(KERN_INFO "isapnp: Scanning for PnP cards...\n"); 993 if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) { 994 isapnp_rdp |= 3; 995 if (!request_region(isapnp_rdp, 1, "isapnp read")) { 996 printk(KERN_ERR 997 "isapnp: Read Data Register 0x%x already used\n", 998 isapnp_rdp); 999#ifdef ISAPNP_REGION_OK 1000 release_region(_PIDXR, 1); 1001#endif 1002 release_region(_PNPWRP, 1); 1003 return -EBUSY; 1004 } 1005 isapnp_set_rdp(); 1006 } 1007 if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) { 1008 cards = isapnp_isolate(); 1009 if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) { 1010#ifdef ISAPNP_REGION_OK 1011 release_region(_PIDXR, 1); 1012#endif 1013 release_region(_PNPWRP, 1); 1014 printk(KERN_INFO 1015 "isapnp: No Plug & Play device found\n"); 1016 return 0; 1017 } 1018 request_region(isapnp_rdp, 1, "isapnp read"); 1019 } 1020 isapnp_build_device_list(); 1021 cards = 0; 1022 1023 protocol_for_each_card(&isapnp_protocol, card) { 1024 cards++; 1025 if (isapnp_verbose) { 1026 dev_info(&card->dev, "card '%s'\n", 1027 card->name[0] ? card->name : "unknown"); 1028 if (isapnp_verbose < 2) 1029 continue; 1030 card_for_each_dev(card, dev) { 1031 dev_info(&card->dev, "device '%s'\n", 1032 dev->name[0] ? dev->name : "unknown"); 1033 } 1034 } 1035 } 1036 if (cards) 1037 printk(KERN_INFO 1038 "isapnp: %i Plug & Play card%s detected total\n", cards, 1039 cards > 1 ? "s" : ""); 1040 else 1041 printk(KERN_INFO "isapnp: No Plug & Play card found\n"); 1042 1043 isapnp_proc_init(); 1044 return 0; 1045} 1046 1047device_initcall(isapnp_init); 1048 1049/* format is: noisapnp */ 1050 1051static int __init isapnp_setup_disable(char *str) 1052{ 1053 isapnp_disable = 1; 1054 return 1; 1055} 1056 1057__setup("noisapnp", isapnp_setup_disable); 1058 1059/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */ 1060 1061static int __init isapnp_setup_isapnp(char *str) 1062{ 1063 (void)((get_option(&str, &isapnp_rdp) == 2) && 1064 (get_option(&str, &isapnp_reset) == 2) && 1065 (get_option(&str, &isapnp_verbose) == 2)); 1066 return 1; 1067} 1068 1069__setup("isapnp=", isapnp_setup_isapnp); 1070