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core.c
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linux-6.19.14/drivers/pnp/isapnp/core.c
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 <linux/string_choices.h> 31#include <asm/io.h> 32 33#include "../base.h" 34 35#if 0 36#define ISAPNP_REGION_OK 37#endif 38 39int isapnp_disable; /* Disable ISA PnP */ 40static int isapnp_rdp; /* Read Data Port */ 41static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */ 42static int isapnp_verbose = 1; /* verbose mode */ 43 44module_param(isapnp_disable, int, 0); 45MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable"); 46module_param(isapnp_rdp, int, 0); 47MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port"); 48module_param(isapnp_reset, int, 0); 49MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards"); 50module_param(isapnp_verbose, int, 0); 51MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode"); 52 53#define _PIDXR 0x279 54#define _PNPWRP 0xa79 55 56/* short tags */ 57#define _STAG_PNPVERNO 0x01 58#define _STAG_LOGDEVID 0x02 59#define _STAG_COMPATDEVID 0x03 60#define _STAG_IRQ 0x04 61#define _STAG_DMA 0x05 62#define _STAG_STARTDEP 0x06 63#define _STAG_ENDDEP 0x07 64#define _STAG_IOPORT 0x08 65#define _STAG_FIXEDIO 0x09 66#define _STAG_VENDOR 0x0e 67#define _STAG_END 0x0f 68/* long tags */ 69#define _LTAG_MEMRANGE 0x81 70#define _LTAG_ANSISTR 0x82 71#define _LTAG_UNICODESTR 0x83 72#define _LTAG_VENDOR 0x84 73#define _LTAG_MEM32RANGE 0x85 74#define _LTAG_FIXEDMEM32RANGE 0x86 75 76/* Logical device control and configuration registers */ 77 78#define ISAPNP_CFG_ACTIVATE 0x30 /* byte */ 79#define ISAPNP_CFG_MEM 0x40 /* 4 * dword */ 80#define ISAPNP_CFG_PORT 0x60 /* 8 * word */ 81#define ISAPNP_CFG_IRQ 0x70 /* 2 * word */ 82#define ISAPNP_CFG_DMA 0x74 /* 2 * byte */ 83 84/* 85 * Sizes of ISAPNP logical device configuration register sets. 86 * See PNP-ISA-v1.0a.pdf, Appendix A. 87 */ 88#define ISAPNP_MAX_MEM 4 89#define ISAPNP_MAX_PORT 8 90#define ISAPNP_MAX_IRQ 2 91#define ISAPNP_MAX_DMA 2 92 93static unsigned char isapnp_checksum_value; 94static DEFINE_MUTEX(isapnp_cfg_mutex); 95static int isapnp_csn_count; 96 97/* some prototypes */ 98 99static inline void write_data(unsigned char x) 100{ 101 outb(x, _PNPWRP); 102} 103 104static inline void write_address(unsigned char x) 105{ 106 outb(x, _PIDXR); 107 udelay(20); 108} 109 110static inline unsigned char read_data(void) 111{ 112 unsigned char val = inb(isapnp_rdp); 113 return val; 114} 115 116unsigned char isapnp_read_byte(unsigned char idx) 117{ 118 write_address(idx); 119 return read_data(); 120} 121 122static unsigned short isapnp_read_word(unsigned char idx) 123{ 124 unsigned short val; 125 126 val = isapnp_read_byte(idx); 127 val = (val << 8) + isapnp_read_byte(idx + 1); 128 return val; 129} 130 131void isapnp_write_byte(unsigned char idx, unsigned char val) 132{ 133 write_address(idx); 134 write_data(val); 135} 136 137static void isapnp_write_word(unsigned char idx, unsigned short val) 138{ 139 isapnp_write_byte(idx, val >> 8); 140 isapnp_write_byte(idx + 1, val); 141} 142 143static void isapnp_key(void) 144{ 145 unsigned char code = 0x6a, msb; 146 int i; 147 148 mdelay(1); 149 write_address(0x00); 150 write_address(0x00); 151 152 write_address(code); 153 154 for (i = 1; i < 32; i++) { 155 msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7; 156 code = (code >> 1) | msb; 157 write_address(code); 158 } 159} 160 161/* place all pnp cards in wait-for-key state */ 162static void isapnp_wait(void) 163{ 164 isapnp_write_byte(0x02, 0x02); 165} 166 167static void isapnp_wake(unsigned char csn) 168{ 169 isapnp_write_byte(0x03, csn); 170} 171 172static void isapnp_device(unsigned char logdev) 173{ 174 isapnp_write_byte(0x07, logdev); 175} 176 177static void isapnp_activate(unsigned char logdev) 178{ 179 isapnp_device(logdev); 180 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1); 181 udelay(250); 182} 183 184static void isapnp_deactivate(unsigned char logdev) 185{ 186 isapnp_device(logdev); 187 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0); 188 udelay(500); 189} 190 191static void __init isapnp_peek(unsigned char *data, int bytes) 192{ 193 int i, j; 194 unsigned char d = 0; 195 196 for (i = 1; i <= bytes; i++) { 197 for (j = 0; j < 20; j++) { 198 d = isapnp_read_byte(0x05); 199 if (d & 1) 200 break; 201 udelay(100); 202 } 203 if (!(d & 1)) { 204 if (data != NULL) 205 *data++ = 0xff; 206 continue; 207 } 208 d = isapnp_read_byte(0x04); /* PRESDI */ 209 isapnp_checksum_value += d; 210 if (data != NULL) 211 *data++ = d; 212 } 213} 214 215#define RDP_STEP 32 /* minimum is 4 */ 216 217static int isapnp_next_rdp(void) 218{ 219 int rdp = isapnp_rdp; 220 static int old_rdp = 0; 221 222 if (old_rdp) { 223 release_region(old_rdp, 1); 224 old_rdp = 0; 225 } 226 while (rdp <= 0x3ff) { 227 /* 228 * We cannot use NE2000 probe spaces for ISAPnP or we 229 * will lock up machines. 230 */ 231 if ((rdp < 0x280 || rdp > 0x380) 232 && request_region(rdp, 1, "ISAPnP")) { 233 isapnp_rdp = rdp; 234 old_rdp = rdp; 235 return 0; 236 } 237 rdp += RDP_STEP; 238 } 239 return -1; 240} 241 242/* Set read port address */ 243static inline void isapnp_set_rdp(void) 244{ 245 isapnp_write_byte(0x00, isapnp_rdp >> 2); 246 udelay(100); 247} 248 249/* 250 * Perform an isolation. The port selection code now tries to avoid 251 * "dangerous to read" ports. 252 */ 253static int __init isapnp_isolate_rdp_select(void) 254{ 255 isapnp_wait(); 256 isapnp_key(); 257 258 /* Control: reset CSN and conditionally everything else too */ 259 isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04); 260 mdelay(2); 261 262 isapnp_wait(); 263 isapnp_key(); 264 isapnp_wake(0x00); 265 266 if (isapnp_next_rdp() < 0) { 267 isapnp_wait(); 268 return -1; 269 } 270 271 isapnp_set_rdp(); 272 udelay(1000); 273 write_address(0x01); 274 udelay(1000); 275 return 0; 276} 277 278/* 279 * Isolate (assign uniqued CSN) to all ISA PnP devices. 280 */ 281static int __init isapnp_isolate(void) 282{ 283 unsigned char checksum = 0x6a; 284 unsigned char chksum = 0x00; 285 unsigned char bit = 0x00; 286 int data; 287 int csn = 0; 288 int i; 289 int iteration = 1; 290 291 isapnp_rdp = 0x213; 292 if (isapnp_isolate_rdp_select() < 0) 293 return -1; 294 295 while (1) { 296 for (i = 1; i <= 64; i++) { 297 data = read_data() << 8; 298 udelay(250); 299 data = data | read_data(); 300 udelay(250); 301 if (data == 0x55aa) 302 bit = 0x01; 303 checksum = 304 ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) 305 | (checksum >> 1); 306 bit = 0x00; 307 } 308 for (i = 65; i <= 72; i++) { 309 data = read_data() << 8; 310 udelay(250); 311 data = data | read_data(); 312 udelay(250); 313 if (data == 0x55aa) 314 chksum |= (1 << (i - 65)); 315 } 316 if (checksum != 0x00 && checksum == chksum) { 317 csn++; 318 319 isapnp_write_byte(0x06, csn); 320 udelay(250); 321 iteration++; 322 isapnp_wake(0x00); 323 isapnp_set_rdp(); 324 udelay(1000); 325 write_address(0x01); 326 udelay(1000); 327 goto __next; 328 } 329 if (iteration == 1) { 330 isapnp_rdp += RDP_STEP; 331 if (isapnp_isolate_rdp_select() < 0) 332 return -1; 333 } else if (iteration > 1) { 334 break; 335 } 336__next: 337 if (csn == 255) 338 break; 339 checksum = 0x6a; 340 chksum = 0x00; 341 bit = 0x00; 342 } 343 isapnp_wait(); 344 isapnp_csn_count = csn; 345 return csn; 346} 347 348/* 349 * Read one tag from stream. 350 */ 351static int __init isapnp_read_tag(unsigned char *type, unsigned short *size) 352{ 353 unsigned char tag, tmp[2]; 354 355 isapnp_peek(&tag, 1); 356 if (tag == 0) /* invalid tag */ 357 return -1; 358 if (tag & 0x80) { /* large item */ 359 *type = tag; 360 isapnp_peek(tmp, 2); 361 *size = (tmp[1] << 8) | tmp[0]; 362 } else { 363 *type = (tag >> 3) & 0x0f; 364 *size = tag & 0x07; 365 } 366 if (*type == 0xff && *size == 0xffff) /* probably invalid data */ 367 return -1; 368 return 0; 369} 370 371/* 372 * Skip specified number of bytes from stream. 373 */ 374static void __init isapnp_skip_bytes(int count) 375{ 376 isapnp_peek(NULL, count); 377} 378 379/* 380 * Parse logical device tag. 381 */ 382static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card, 383 int size, int number) 384{ 385 unsigned char tmp[6]; 386 struct pnp_dev *dev; 387 u32 eisa_id; 388 char id[8]; 389 390 isapnp_peek(tmp, size); 391 eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24; 392 pnp_eisa_id_to_string(eisa_id, id); 393 394 dev = pnp_alloc_dev(&isapnp_protocol, number, id); 395 if (!dev) 396 return NULL; 397 398 dev->card = card; 399 dev->capabilities |= PNP_CONFIGURABLE; 400 dev->capabilities |= PNP_READ; 401 dev->capabilities |= PNP_WRITE; 402 dev->capabilities |= PNP_DISABLE; 403 pnp_init_resources(dev); 404 return dev; 405} 406 407/* 408 * Add IRQ resource to resources list. 409 */ 410static void __init isapnp_parse_irq_resource(struct pnp_dev *dev, 411 unsigned int option_flags, 412 int size) 413{ 414 unsigned char tmp[3]; 415 unsigned long bits; 416 pnp_irq_mask_t map; 417 unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; 418 419 isapnp_peek(tmp, size); 420 bits = (tmp[1] << 8) | tmp[0]; 421 422 bitmap_zero(map.bits, PNP_IRQ_NR); 423 bitmap_copy(map.bits, &bits, 16); 424 425 if (size > 2) 426 flags = tmp[2]; 427 428 pnp_register_irq_resource(dev, option_flags, &map, flags); 429} 430 431/* 432 * Add DMA resource to resources list. 433 */ 434static void __init isapnp_parse_dma_resource(struct pnp_dev *dev, 435 unsigned int option_flags, 436 int size) 437{ 438 unsigned char tmp[2]; 439 440 isapnp_peek(tmp, size); 441 pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]); 442} 443 444/* 445 * Add port resource to resources list. 446 */ 447static void __init isapnp_parse_port_resource(struct pnp_dev *dev, 448 unsigned int option_flags, 449 int size) 450{ 451 unsigned char tmp[7]; 452 resource_size_t min, max, align, len; 453 unsigned char flags; 454 455 isapnp_peek(tmp, size); 456 min = (tmp[2] << 8) | tmp[1]; 457 max = (tmp[4] << 8) | tmp[3]; 458 align = tmp[5]; 459 len = tmp[6]; 460 flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0; 461 pnp_register_port_resource(dev, option_flags, 462 min, max, align, len, flags); 463} 464 465/* 466 * Add fixed port resource to resources list. 467 */ 468static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev, 469 unsigned int option_flags, 470 int size) 471{ 472 unsigned char tmp[3]; 473 resource_size_t base, len; 474 475 isapnp_peek(tmp, size); 476 base = (tmp[1] << 8) | tmp[0]; 477 len = tmp[2]; 478 pnp_register_port_resource(dev, option_flags, base, base, 0, len, 479 IORESOURCE_IO_FIXED); 480} 481 482/* 483 * Add memory resource to resources list. 484 */ 485static void __init isapnp_parse_mem_resource(struct pnp_dev *dev, 486 unsigned int option_flags, 487 int size) 488{ 489 unsigned char tmp[9]; 490 resource_size_t min, max, align, len; 491 unsigned char flags; 492 493 isapnp_peek(tmp, size); 494 min = ((tmp[2] << 8) | tmp[1]) << 8; 495 max = ((tmp[4] << 8) | tmp[3]) << 8; 496 align = (tmp[6] << 8) | tmp[5]; 497 len = ((tmp[8] << 8) | tmp[7]) << 8; 498 flags = tmp[0]; 499 pnp_register_mem_resource(dev, option_flags, 500 min, max, align, len, flags); 501} 502 503/* 504 * Add 32-bit memory resource to resources list. 505 */ 506static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev, 507 unsigned int option_flags, 508 int size) 509{ 510 unsigned char tmp[17]; 511 resource_size_t min, max, align, len; 512 unsigned char flags; 513 514 isapnp_peek(tmp, size); 515 min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; 516 max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; 517 align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; 518 len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; 519 flags = tmp[0]; 520 pnp_register_mem_resource(dev, option_flags, 521 min, max, align, len, flags); 522} 523 524/* 525 * Add 32-bit fixed memory resource to resources list. 526 */ 527static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev, 528 unsigned int option_flags, 529 int size) 530{ 531 unsigned char tmp[9]; 532 resource_size_t base, len; 533 unsigned char flags; 534 535 isapnp_peek(tmp, size); 536 base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; 537 len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; 538 flags = tmp[0]; 539 pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags); 540} 541 542/* 543 * Parse card name for ISA PnP device. 544 */ 545static void __init 546isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size) 547{ 548 if (name[0] == '\0') { 549 unsigned short size1 = 550 *size >= name_max ? (name_max - 1) : *size; 551 isapnp_peek(name, size1); 552 name[size1] = '\0'; 553 *size -= size1; 554 555 /* clean whitespace from end of string */ 556 while (size1 > 0 && name[--size1] == ' ') 557 name[size1] = '\0'; 558 } 559} 560 561/* 562 * Parse resource map for logical device. 563 */ 564static int __init isapnp_create_device(struct pnp_card *card, 565 unsigned short size) 566{ 567 int number = 0, skip = 0, priority, compat = 0; 568 unsigned char type, tmp[17]; 569 unsigned int option_flags; 570 struct pnp_dev *dev; 571 u32 eisa_id; 572 char id[8]; 573 574 if ((dev = isapnp_parse_device(card, size, number++)) == NULL) 575 return 1; 576 option_flags = 0; 577 pnp_add_card_device(card, dev); 578 579 while (1) { 580 if (isapnp_read_tag(&type, &size) < 0) 581 return 1; 582 if (skip && type != _STAG_LOGDEVID && type != _STAG_END) 583 goto __skip; 584 switch (type) { 585 case _STAG_LOGDEVID: 586 if (size >= 5 && size <= 6) { 587 if ((dev = 588 isapnp_parse_device(card, size, 589 number++)) == NULL) 590 return 1; 591 size = 0; 592 skip = 0; 593 option_flags = 0; 594 pnp_add_card_device(card, dev); 595 } else { 596 skip = 1; 597 } 598 compat = 0; 599 break; 600 case _STAG_COMPATDEVID: 601 if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { 602 isapnp_peek(tmp, 4); 603 eisa_id = tmp[0] | tmp[1] << 8 | 604 tmp[2] << 16 | tmp[3] << 24; 605 pnp_eisa_id_to_string(eisa_id, id); 606 pnp_add_id(dev, id); 607 compat++; 608 size = 0; 609 } 610 break; 611 case _STAG_IRQ: 612 if (size < 2 || size > 3) 613 goto __skip; 614 isapnp_parse_irq_resource(dev, option_flags, size); 615 size = 0; 616 break; 617 case _STAG_DMA: 618 if (size != 2) 619 goto __skip; 620 isapnp_parse_dma_resource(dev, option_flags, size); 621 size = 0; 622 break; 623 case _STAG_STARTDEP: 624 if (size > 1) 625 goto __skip; 626 priority = PNP_RES_PRIORITY_ACCEPTABLE; 627 if (size > 0) { 628 isapnp_peek(tmp, size); 629 priority = tmp[0]; 630 size = 0; 631 } 632 option_flags = pnp_new_dependent_set(dev, priority); 633 break; 634 case _STAG_ENDDEP: 635 if (size != 0) 636 goto __skip; 637 option_flags = 0; 638 break; 639 case _STAG_IOPORT: 640 if (size != 7) 641 goto __skip; 642 isapnp_parse_port_resource(dev, option_flags, size); 643 size = 0; 644 break; 645 case _STAG_FIXEDIO: 646 if (size != 3) 647 goto __skip; 648 isapnp_parse_fixed_port_resource(dev, option_flags, 649 size); 650 size = 0; 651 break; 652 case _STAG_VENDOR: 653 break; 654 case _LTAG_MEMRANGE: 655 if (size != 9) 656 goto __skip; 657 isapnp_parse_mem_resource(dev, option_flags, size); 658 size = 0; 659 break; 660 case _LTAG_ANSISTR: 661 isapnp_parse_name(dev->name, sizeof(dev->name), &size); 662 break; 663 case _LTAG_UNICODESTR: 664 /* silently ignore */ 665 /* who use unicode for hardware identification? */ 666 break; 667 case _LTAG_VENDOR: 668 break; 669 case _LTAG_MEM32RANGE: 670 if (size != 17) 671 goto __skip; 672 isapnp_parse_mem32_resource(dev, option_flags, size); 673 size = 0; 674 break; 675 case _LTAG_FIXEDMEM32RANGE: 676 if (size != 9) 677 goto __skip; 678 isapnp_parse_fixed_mem32_resource(dev, option_flags, 679 size); 680 size = 0; 681 break; 682 case _STAG_END: 683 if (size > 0) 684 isapnp_skip_bytes(size); 685 return 1; 686 default: 687 dev_err(&dev->dev, "unknown tag %#x (card %i), " 688 "ignored\n", type, card->number); 689 } 690__skip: 691 if (size > 0) 692 isapnp_skip_bytes(size); 693 } 694 return 0; 695} 696 697/* 698 * Parse resource map for ISA PnP card. 699 */ 700static void __init isapnp_parse_resource_map(struct pnp_card *card) 701{ 702 unsigned char type, tmp[17]; 703 unsigned short size; 704 705 while (1) { 706 if (isapnp_read_tag(&type, &size) < 0) 707 return; 708 switch (type) { 709 case _STAG_PNPVERNO: 710 if (size != 2) 711 goto __skip; 712 isapnp_peek(tmp, 2); 713 card->pnpver = tmp[0]; 714 card->productver = tmp[1]; 715 size = 0; 716 break; 717 case _STAG_LOGDEVID: 718 if (size >= 5 && size <= 6) { 719 if (isapnp_create_device(card, size) == 1) 720 return; 721 size = 0; 722 } 723 break; 724 case _STAG_VENDOR: 725 break; 726 case _LTAG_ANSISTR: 727 isapnp_parse_name(card->name, sizeof(card->name), 728 &size); 729 break; 730 case _LTAG_UNICODESTR: 731 /* silently ignore */ 732 /* who use unicode for hardware identification? */ 733 break; 734 case _LTAG_VENDOR: 735 break; 736 case _STAG_END: 737 if (size > 0) 738 isapnp_skip_bytes(size); 739 return; 740 default: 741 dev_err(&card->dev, "unknown tag %#x, ignored\n", 742 type); 743 } 744__skip: 745 if (size > 0) 746 isapnp_skip_bytes(size); 747 } 748} 749 750/* 751 * Build device list for all present ISA PnP devices. 752 */ 753static int __init isapnp_build_device_list(void) 754{ 755 int csn; 756 unsigned char header[9]; 757 struct pnp_card *card; 758 u32 eisa_id; 759 char id[8]; 760 761 isapnp_wait(); 762 isapnp_key(); 763 for (csn = 1; csn <= isapnp_csn_count; csn++) { 764 isapnp_wake(csn); 765 isapnp_peek(header, 9); 766 eisa_id = header[0] | header[1] << 8 | 767 header[2] << 16 | header[3] << 24; 768 pnp_eisa_id_to_string(eisa_id, id); 769 card = pnp_alloc_card(&isapnp_protocol, csn, id); 770 if (!card) 771 continue; 772 773 INIT_LIST_HEAD(&card->devices); 774 card->serial = 775 (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | 776 header[4]; 777 isapnp_checksum_value = 0x00; 778 isapnp_parse_resource_map(card); 779 if (isapnp_checksum_value != 0x00) 780 dev_err(&card->dev, "invalid checksum %#x\n", 781 isapnp_checksum_value); 782 card->checksum = isapnp_checksum_value; 783 784 pnp_add_card(card); 785 } 786 isapnp_wait(); 787 return 0; 788} 789 790/* 791 * Basic configuration routines. 792 */ 793 794int isapnp_present(void) 795{ 796 struct pnp_card *card; 797 798 pnp_for_each_card(card) { 799 if (card->protocol == &isapnp_protocol) 800 return 1; 801 } 802 return 0; 803} 804 805int isapnp_cfg_begin(int csn, int logdev) 806{ 807 if (csn < 1 || csn > isapnp_csn_count || logdev > 10) 808 return -EINVAL; 809 mutex_lock(&isapnp_cfg_mutex); 810 isapnp_wait(); 811 isapnp_key(); 812 isapnp_wake(csn); 813#if 0 814 /* to avoid malfunction when the isapnptools package is used */ 815 /* we must set RDP to our value again */ 816 /* it is possible to set RDP only in the isolation phase */ 817 /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */ 818 isapnp_write_byte(0x02, 0x04); /* clear CSN of card */ 819 mdelay(2); /* is this necessary? */ 820 isapnp_wake(csn); /* bring card into sleep state */ 821 isapnp_wake(0); /* bring card into isolation state */ 822 isapnp_set_rdp(); /* reset the RDP port */ 823 udelay(1000); /* delay 1000us */ 824 isapnp_write_byte(0x06, csn); /* reset CSN to previous value */ 825 udelay(250); /* is this necessary? */ 826#endif 827 if (logdev >= 0) 828 isapnp_device(logdev); 829 return 0; 830} 831 832int isapnp_cfg_end(void) 833{ 834 isapnp_wait(); 835 mutex_unlock(&isapnp_cfg_mutex); 836 return 0; 837} 838 839/* 840 * Initialization. 841 */ 842 843EXPORT_SYMBOL(isapnp_protocol); 844EXPORT_SYMBOL(isapnp_present); 845EXPORT_SYMBOL(isapnp_cfg_begin); 846EXPORT_SYMBOL(isapnp_cfg_end); 847EXPORT_SYMBOL(isapnp_read_byte); 848EXPORT_SYMBOL(isapnp_write_byte); 849 850static int isapnp_get_resources(struct pnp_dev *dev) 851{ 852 int i, ret; 853 854 pnp_dbg(&dev->dev, "get resources\n"); 855 pnp_init_resources(dev); 856 isapnp_cfg_begin(dev->card->number, dev->number); 857 dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); 858 if (!dev->active) 859 goto __end; 860 861 for (i = 0; i < ISAPNP_MAX_PORT; i++) { 862 ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1)); 863 pnp_add_io_resource(dev, ret, ret, 864 ret == 0 ? IORESOURCE_DISABLED : 0); 865 } 866 for (i = 0; i < ISAPNP_MAX_MEM; i++) { 867 ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8; 868 pnp_add_mem_resource(dev, ret, ret, 869 ret == 0 ? IORESOURCE_DISABLED : 0); 870 } 871 for (i = 0; i < ISAPNP_MAX_IRQ; i++) { 872 ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8; 873 pnp_add_irq_resource(dev, ret, 874 ret == 0 ? IORESOURCE_DISABLED : 0); 875 } 876 for (i = 0; i < ISAPNP_MAX_DMA; i++) { 877 ret = isapnp_read_byte(ISAPNP_CFG_DMA + i); 878 pnp_add_dma_resource(dev, ret, 879 ret == 4 ? IORESOURCE_DISABLED : 0); 880 } 881 882__end: 883 isapnp_cfg_end(); 884 return 0; 885} 886 887static int isapnp_set_resources(struct pnp_dev *dev) 888{ 889 struct resource *res; 890 int tmp; 891 892 pnp_dbg(&dev->dev, "set resources\n"); 893 isapnp_cfg_begin(dev->card->number, dev->number); 894 dev->active = 1; 895 for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) { 896 res = pnp_get_resource(dev, IORESOURCE_IO, tmp); 897 if (pnp_resource_enabled(res)) { 898 pnp_dbg(&dev->dev, " set io %d to %#llx\n", 899 tmp, (unsigned long long) res->start); 900 isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1), 901 res->start); 902 } 903 } 904 for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) { 905 res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp); 906 if (pnp_resource_enabled(res)) { 907 int irq = res->start; 908 if (irq == 2) 909 irq = 9; 910 pnp_dbg(&dev->dev, " set irq %d to %d\n", tmp, irq); 911 isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq); 912 } 913 } 914 for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) { 915 res = pnp_get_resource(dev, IORESOURCE_DMA, tmp); 916 if (pnp_resource_enabled(res)) { 917 pnp_dbg(&dev->dev, " set dma %d to %lld\n", 918 tmp, (unsigned long long) res->start); 919 isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start); 920 } 921 } 922 for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) { 923 res = pnp_get_resource(dev, IORESOURCE_MEM, tmp); 924 if (pnp_resource_enabled(res)) { 925 pnp_dbg(&dev->dev, " set mem %d to %#llx\n", 926 tmp, (unsigned long long) res->start); 927 isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3), 928 (res->start >> 8) & 0xffff); 929 } 930 } 931 /* FIXME: We aren't handling 32bit mems properly here */ 932 isapnp_activate(dev->number); 933 isapnp_cfg_end(); 934 return 0; 935} 936 937static int isapnp_disable_resources(struct pnp_dev *dev) 938{ 939 if (!dev->active) 940 return -EINVAL; 941 isapnp_cfg_begin(dev->card->number, dev->number); 942 isapnp_deactivate(dev->number); 943 dev->active = 0; 944 isapnp_cfg_end(); 945 return 0; 946} 947 948struct pnp_protocol isapnp_protocol = { 949 .name = "ISA Plug and Play", 950 .get = isapnp_get_resources, 951 .set = isapnp_set_resources, 952 .disable = isapnp_disable_resources, 953}; 954 955static int __init isapnp_init(void) 956{ 957 int cards; 958 struct pnp_card *card; 959 struct pnp_dev *dev; 960 961 if (isapnp_disable) { 962 printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); 963 return 0; 964 } 965#ifdef CONFIG_PPC 966 if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP)) 967 return -EINVAL; 968#endif 969#ifdef ISAPNP_REGION_OK 970 if (!request_region(_PIDXR, 1, "isapnp index")) { 971 printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", 972 _PIDXR); 973 return -EBUSY; 974 } 975#endif 976 if (!request_region(_PNPWRP, 1, "isapnp write")) { 977 printk(KERN_ERR 978 "isapnp: Write Data Register 0x%x already used\n", 979 _PNPWRP); 980#ifdef ISAPNP_REGION_OK 981 release_region(_PIDXR, 1); 982#endif 983 return -EBUSY; 984 } 985 986 if (pnp_register_protocol(&isapnp_protocol) < 0) 987 return -EBUSY; 988 989 /* 990 * Print a message. The existing ISAPnP code is hanging machines 991 * so let the user know where. 992 */ 993 994 printk(KERN_INFO "isapnp: Scanning for PnP cards...\n"); 995 if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) { 996 isapnp_rdp |= 3; 997 if (!request_region(isapnp_rdp, 1, "isapnp read")) { 998 printk(KERN_ERR 999 "isapnp: Read Data Register 0x%x already used\n", 1000 isapnp_rdp); 1001#ifdef ISAPNP_REGION_OK 1002 release_region(_PIDXR, 1); 1003#endif 1004 release_region(_PNPWRP, 1); 1005 return -EBUSY; 1006 } 1007 isapnp_set_rdp(); 1008 } 1009 if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) { 1010 cards = isapnp_isolate(); 1011 if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) { 1012#ifdef ISAPNP_REGION_OK 1013 release_region(_PIDXR, 1); 1014#endif 1015 release_region(_PNPWRP, 1); 1016 printk(KERN_INFO 1017 "isapnp: No Plug & Play device found\n"); 1018 return 0; 1019 } 1020 request_region(isapnp_rdp, 1, "isapnp read"); 1021 } 1022 isapnp_build_device_list(); 1023 cards = 0; 1024 1025 protocol_for_each_card(&isapnp_protocol, card) { 1026 cards++; 1027 if (isapnp_verbose) { 1028 dev_info(&card->dev, "card '%s'\n", 1029 card->name[0] ? card->name : "unknown"); 1030 if (isapnp_verbose < 2) 1031 continue; 1032 card_for_each_dev(card, dev) { 1033 dev_info(&card->dev, "device '%s'\n", 1034 dev->name[0] ? dev->name : "unknown"); 1035 } 1036 } 1037 } 1038 if (cards) 1039 printk(KERN_INFO 1040 "isapnp: %i Plug & Play card%s detected total\n", cards, 1041 str_plural(cards)); 1042 else 1043 printk(KERN_INFO "isapnp: No Plug & Play card found\n"); 1044 1045 isapnp_proc_init(); 1046 return 0; 1047} 1048 1049device_initcall(isapnp_init); 1050 1051/* format is: noisapnp */ 1052 1053static int __init isapnp_setup_disable(char *str) 1054{ 1055 isapnp_disable = 1; 1056 return 1; 1057} 1058 1059__setup("noisapnp", isapnp_setup_disable); 1060 1061/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */ 1062 1063static int __init isapnp_setup_isapnp(char *str) 1064{ 1065 (void)((get_option(&str, &isapnp_rdp) == 2) && 1066 (get_option(&str, &isapnp_reset) == 2) && 1067 (get_option(&str, &isapnp_verbose) == 2)); 1068 return 1; 1069} 1070 1071__setup("isapnp=", isapnp_setup_isapnp);
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