1/* 2 * cistpl.c -- 16-bit PCMCIA Card Information Structure parser 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * The initial developer of the original code is David A. Hinds 9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 11 * 12 * (C) 1999 David A. Hinds 13 */ 14 15#include <linux/module.h> 16#include <linux/moduleparam.h> 17#include <linux/kernel.h> 18#include <linux/string.h> 19#include <linux/major.h> 20#include <linux/errno.h> 21#include <linux/timer.h> 22#include <linux/slab.h> 23#include <linux/mm.h> 24#include <linux/pci.h> 25#include <linux/ioport.h> 26#include <linux/io.h> 27#include <asm/byteorder.h> 28#include <asm/unaligned.h> 29 30#include <pcmcia/ss.h> 31#include <pcmcia/cs.h> 32#include <pcmcia/cisreg.h> 33#include <pcmcia/cistpl.h> 34#include "cs_internal.h" 35 36static const u_char mantissa[] = { 37 10, 12, 13, 15, 20, 25, 30, 35, 38 40, 45, 50, 55, 60, 70, 80, 90 39}; 40 41static const u_int exponent[] = { 42 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 43}; 44 45/* Convert an extended speed byte to a time in nanoseconds */ 46#define SPEED_CVT(v) \ 47 (mantissa[(((v)>>3)&15)-1] * exponent[(v)&7] / 10) 48/* Convert a power byte to a current in 0.1 microamps */ 49#define POWER_CVT(v) \ 50 (mantissa[((v)>>3)&15] * exponent[(v)&7] / 10) 51#define POWER_SCALE(v) (exponent[(v)&7]) 52 53/* Upper limit on reasonable # of tuples */ 54#define MAX_TUPLES 200 55 56/* Bits in IRQInfo1 field */ 57#define IRQ_INFO2_VALID 0x10 58 59/* 16-bit CIS? */ 60static int cis_width; 61module_param(cis_width, int, 0444); 62 63void release_cis_mem(struct pcmcia_socket *s) 64{ 65 mutex_lock(&s->ops_mutex); 66 if (s->cis_mem.flags & MAP_ACTIVE) { 67 s->cis_mem.flags &= ~MAP_ACTIVE; 68 s->ops->set_mem_map(s, &s->cis_mem); 69 if (s->cis_mem.res) { 70 release_resource(s->cis_mem.res); 71 kfree(s->cis_mem.res); 72 s->cis_mem.res = NULL; 73 } 74 iounmap(s->cis_virt); 75 s->cis_virt = NULL; 76 } 77 mutex_unlock(&s->ops_mutex); 78} 79 80/** 81 * set_cis_map() - map the card memory at "card_offset" into virtual space. 82 * 83 * If flags & MAP_ATTRIB, map the attribute space, otherwise 84 * map the memory space. 85 * 86 * Must be called with ops_mutex held. 87 */ 88static void __iomem *set_cis_map(struct pcmcia_socket *s, 89 unsigned int card_offset, unsigned int flags) 90{ 91 pccard_mem_map *mem = &s->cis_mem; 92 int ret; 93 94 if (!(s->features & SS_CAP_STATIC_MAP) && (mem->res == NULL)) { 95 mem->res = pcmcia_find_mem_region(0, s->map_size, 96 s->map_size, 0, s); 97 if (mem->res == NULL) { 98 dev_printk(KERN_NOTICE, &s->dev, 99 "cs: unable to map card memory!\n"); 100 return NULL; 101 } 102 s->cis_virt = NULL; 103 } 104 105 if (!(s->features & SS_CAP_STATIC_MAP) && (!s->cis_virt)) 106 s->cis_virt = ioremap(mem->res->start, s->map_size); 107 108 mem->card_start = card_offset; 109 mem->flags = flags; 110 111 ret = s->ops->set_mem_map(s, mem); 112 if (ret) { 113 iounmap(s->cis_virt); 114 s->cis_virt = NULL; 115 return NULL; 116 } 117 118 if (s->features & SS_CAP_STATIC_MAP) { 119 if (s->cis_virt) 120 iounmap(s->cis_virt); 121 s->cis_virt = ioremap(mem->static_start, s->map_size); 122 } 123 124 return s->cis_virt; 125} 126 127 128/* Bits in attr field */ 129#define IS_ATTR 1 130#define IS_INDIRECT 8 131 132/** 133 * pcmcia_read_cis_mem() - low-level function to read CIS memory 134 * 135 * must be called with ops_mutex held 136 */ 137int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr, 138 u_int len, void *ptr) 139{ 140 void __iomem *sys, *end; 141 unsigned char *buf = ptr; 142 143 dev_dbg(&s->dev, "pcmcia_read_cis_mem(%d, %#x, %u)\n", attr, addr, len); 144 145 if (attr & IS_INDIRECT) { 146 /* Indirect accesses use a bunch of special registers at fixed 147 locations in common memory */ 148 u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN; 149 if (attr & IS_ATTR) { 150 addr *= 2; 151 flags = ICTRL0_AUTOINC; 152 } 153 154 sys = set_cis_map(s, 0, MAP_ACTIVE | 155 ((cis_width) ? MAP_16BIT : 0)); 156 if (!sys) { 157 dev_dbg(&s->dev, "could not map memory\n"); 158 memset(ptr, 0xff, len); 159 return -1; 160 } 161 162 writeb(flags, sys+CISREG_ICTRL0); 163 writeb(addr & 0xff, sys+CISREG_IADDR0); 164 writeb((addr>>8) & 0xff, sys+CISREG_IADDR1); 165 writeb((addr>>16) & 0xff, sys+CISREG_IADDR2); 166 writeb((addr>>24) & 0xff, sys+CISREG_IADDR3); 167 for ( ; len > 0; len--, buf++) 168 *buf = readb(sys+CISREG_IDATA0); 169 } else { 170 u_int inc = 1, card_offset, flags; 171 172 if (addr > CISTPL_MAX_CIS_SIZE) 173 dev_dbg(&s->dev, 174 "attempt to read CIS mem at addr %#x", addr); 175 176 flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0); 177 if (attr) { 178 flags |= MAP_ATTRIB; 179 inc++; 180 addr *= 2; 181 } 182 183 card_offset = addr & ~(s->map_size-1); 184 while (len) { 185 sys = set_cis_map(s, card_offset, flags); 186 if (!sys) { 187 dev_dbg(&s->dev, "could not map memory\n"); 188 memset(ptr, 0xff, len); 189 return -1; 190 } 191 end = sys + s->map_size; 192 sys = sys + (addr & (s->map_size-1)); 193 for ( ; len > 0; len--, buf++, sys += inc) { 194 if (sys == end) 195 break; 196 *buf = readb(sys); 197 } 198 card_offset += s->map_size; 199 addr = 0; 200 } 201 } 202 dev_dbg(&s->dev, " %#2.2x %#2.2x %#2.2x %#2.2x ...\n", 203 *(u_char *)(ptr+0), *(u_char *)(ptr+1), 204 *(u_char *)(ptr+2), *(u_char *)(ptr+3)); 205 return 0; 206} 207 208 209/** 210 * pcmcia_write_cis_mem() - low-level function to write CIS memory 211 * 212 * Probably only useful for writing one-byte registers. Must be called 213 * with ops_mutex held. 214 */ 215int pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr, 216 u_int len, void *ptr) 217{ 218 void __iomem *sys, *end; 219 unsigned char *buf = ptr; 220 221 dev_dbg(&s->dev, 222 "pcmcia_write_cis_mem(%d, %#x, %u)\n", attr, addr, len); 223 224 if (attr & IS_INDIRECT) { 225 /* Indirect accesses use a bunch of special registers at fixed 226 locations in common memory */ 227 u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN; 228 if (attr & IS_ATTR) { 229 addr *= 2; 230 flags = ICTRL0_AUTOINC; 231 } 232 233 sys = set_cis_map(s, 0, MAP_ACTIVE | 234 ((cis_width) ? MAP_16BIT : 0)); 235 if (!sys) { 236 dev_dbg(&s->dev, "could not map memory\n"); 237 return -EINVAL; 238 } 239 240 writeb(flags, sys+CISREG_ICTRL0); 241 writeb(addr & 0xff, sys+CISREG_IADDR0); 242 writeb((addr>>8) & 0xff, sys+CISREG_IADDR1); 243 writeb((addr>>16) & 0xff, sys+CISREG_IADDR2); 244 writeb((addr>>24) & 0xff, sys+CISREG_IADDR3); 245 for ( ; len > 0; len--, buf++) 246 writeb(*buf, sys+CISREG_IDATA0); 247 } else { 248 u_int inc = 1, card_offset, flags; 249 250 flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0); 251 if (attr & IS_ATTR) { 252 flags |= MAP_ATTRIB; 253 inc++; 254 addr *= 2; 255 } 256 257 card_offset = addr & ~(s->map_size-1); 258 while (len) { 259 sys = set_cis_map(s, card_offset, flags); 260 if (!sys) { 261 dev_dbg(&s->dev, "could not map memory\n"); 262 return -EINVAL; 263 } 264 265 end = sys + s->map_size; 266 sys = sys + (addr & (s->map_size-1)); 267 for ( ; len > 0; len--, buf++, sys += inc) { 268 if (sys == end) 269 break; 270 writeb(*buf, sys); 271 } 272 card_offset += s->map_size; 273 addr = 0; 274 } 275 } 276 return 0; 277} 278 279 280/** 281 * read_cis_cache() - read CIS memory or its associated cache 282 * 283 * This is a wrapper around read_cis_mem, with the same interface, 284 * but which caches information, for cards whose CIS may not be 285 * readable all the time. 286 */ 287static int read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, 288 size_t len, void *ptr) 289{ 290 struct cis_cache_entry *cis; 291 int ret = 0; 292 293 if (s->state & SOCKET_CARDBUS) 294 return -EINVAL; 295 296 mutex_lock(&s->ops_mutex); 297 if (s->fake_cis) { 298 if (s->fake_cis_len >= addr+len) 299 memcpy(ptr, s->fake_cis+addr, len); 300 else { 301 memset(ptr, 0xff, len); 302 ret = -EINVAL; 303 } 304 mutex_unlock(&s->ops_mutex); 305 return ret; 306 } 307 308 list_for_each_entry(cis, &s->cis_cache, node) { 309 if (cis->addr == addr && cis->len == len && cis->attr == attr) { 310 memcpy(ptr, cis->cache, len); 311 mutex_unlock(&s->ops_mutex); 312 return 0; 313 } 314 } 315 316 ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr); 317 318 if (ret == 0) { 319 /* Copy data into the cache */ 320 cis = kmalloc(sizeof(struct cis_cache_entry) + len, GFP_KERNEL); 321 if (cis) { 322 cis->addr = addr; 323 cis->len = len; 324 cis->attr = attr; 325 memcpy(cis->cache, ptr, len); 326 list_add(&cis->node, &s->cis_cache); 327 } 328 } 329 mutex_unlock(&s->ops_mutex); 330 331 return ret; 332} 333 334static void 335remove_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, u_int len) 336{ 337 struct cis_cache_entry *cis; 338 339 mutex_lock(&s->ops_mutex); 340 list_for_each_entry(cis, &s->cis_cache, node) 341 if (cis->addr == addr && cis->len == len && cis->attr == attr) { 342 list_del(&cis->node); 343 kfree(cis); 344 break; 345 } 346 mutex_unlock(&s->ops_mutex); 347} 348 349/** 350 * destroy_cis_cache() - destroy the CIS cache 351 * @s: pcmcia_socket for which CIS cache shall be destroyed 352 * 353 * This destroys the CIS cache but keeps any fake CIS alive. Must be 354 * called with ops_mutex held. 355 */ 356void destroy_cis_cache(struct pcmcia_socket *s) 357{ 358 struct list_head *l, *n; 359 struct cis_cache_entry *cis; 360 361 list_for_each_safe(l, n, &s->cis_cache) { 362 cis = list_entry(l, struct cis_cache_entry, node); 363 list_del(&cis->node); 364 kfree(cis); 365 } 366} 367 368/** 369 * verify_cis_cache() - does the CIS match what is in the CIS cache? 370 */ 371int verify_cis_cache(struct pcmcia_socket *s) 372{ 373 struct cis_cache_entry *cis; 374 char *buf; 375 int ret; 376 377 if (s->state & SOCKET_CARDBUS) 378 return -EINVAL; 379 380 buf = kmalloc(256, GFP_KERNEL); 381 if (buf == NULL) { 382 dev_printk(KERN_WARNING, &s->dev, 383 "no memory for verifying CIS\n"); 384 return -ENOMEM; 385 } 386 mutex_lock(&s->ops_mutex); 387 list_for_each_entry(cis, &s->cis_cache, node) { 388 int len = cis->len; 389 390 if (len > 256) 391 len = 256; 392 393 ret = pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf); 394 if (ret || memcmp(buf, cis->cache, len) != 0) { 395 kfree(buf); 396 mutex_unlock(&s->ops_mutex); 397 return -1; 398 } 399 } 400 kfree(buf); 401 mutex_unlock(&s->ops_mutex); 402 return 0; 403} 404 405/** 406 * pcmcia_replace_cis() - use a replacement CIS instead of the card's CIS 407 * 408 * For really bad cards, we provide a facility for uploading a 409 * replacement CIS. 410 */ 411int pcmcia_replace_cis(struct pcmcia_socket *s, 412 const u8 *data, const size_t len) 413{ 414 if (len > CISTPL_MAX_CIS_SIZE) { 415 dev_printk(KERN_WARNING, &s->dev, "replacement CIS too big\n"); 416 return -EINVAL; 417 } 418 mutex_lock(&s->ops_mutex); 419 kfree(s->fake_cis); 420 s->fake_cis = kmalloc(len, GFP_KERNEL); 421 if (s->fake_cis == NULL) { 422 dev_printk(KERN_WARNING, &s->dev, "no memory to replace CIS\n"); 423 mutex_unlock(&s->ops_mutex); 424 return -ENOMEM; 425 } 426 s->fake_cis_len = len; 427 memcpy(s->fake_cis, data, len); 428 dev_info(&s->dev, "Using replacement CIS\n"); 429 mutex_unlock(&s->ops_mutex); 430 return 0; 431} 432 433/* The high-level CIS tuple services */ 434 435typedef struct tuple_flags { 436 u_int link_space:4; 437 u_int has_link:1; 438 u_int mfc_fn:3; 439 u_int space:4; 440} tuple_flags; 441 442#define LINK_SPACE(f) (((tuple_flags *)(&(f)))->link_space) 443#define HAS_LINK(f) (((tuple_flags *)(&(f)))->has_link) 444#define MFC_FN(f) (((tuple_flags *)(&(f)))->mfc_fn) 445#define SPACE(f) (((tuple_flags *)(&(f)))->space) 446 447int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function, 448 tuple_t *tuple) 449{ 450 if (!s) 451 return -EINVAL; 452 453 if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS)) 454 return -ENODEV; 455 tuple->TupleLink = tuple->Flags = 0; 456 457 /* Assume presence of a LONGLINK_C to address 0 */ 458 tuple->CISOffset = tuple->LinkOffset = 0; 459 SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1; 460 461 if ((s->functions > 1) && !(tuple->Attributes & TUPLE_RETURN_COMMON)) { 462 cisdata_t req = tuple->DesiredTuple; 463 tuple->DesiredTuple = CISTPL_LONGLINK_MFC; 464 if (pccard_get_next_tuple(s, function, tuple) == 0) { 465 tuple->DesiredTuple = CISTPL_LINKTARGET; 466 if (pccard_get_next_tuple(s, function, tuple) != 0) 467 return -ENOSPC; 468 } else 469 tuple->CISOffset = tuple->TupleLink = 0; 470 tuple->DesiredTuple = req; 471 } 472 return pccard_get_next_tuple(s, function, tuple); 473} 474 475static int follow_link(struct pcmcia_socket *s, tuple_t *tuple) 476{ 477 u_char link[5]; 478 u_int ofs; 479 int ret; 480 481 if (MFC_FN(tuple->Flags)) { 482 /* Get indirect link from the MFC tuple */ 483 ret = read_cis_cache(s, LINK_SPACE(tuple->Flags), 484 tuple->LinkOffset, 5, link); 485 if (ret) 486 return -1; 487 ofs = get_unaligned_le32(link + 1); 488 SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR); 489 /* Move to the next indirect link */ 490 tuple->LinkOffset += 5; 491 MFC_FN(tuple->Flags)--; 492 } else if (HAS_LINK(tuple->Flags)) { 493 ofs = tuple->LinkOffset; 494 SPACE(tuple->Flags) = LINK_SPACE(tuple->Flags); 495 HAS_LINK(tuple->Flags) = 0; 496 } else 497 return -1; 498 499 if (SPACE(tuple->Flags)) { 500 /* This is ugly, but a common CIS error is to code the long 501 link offset incorrectly, so we check the right spot... */ 502 ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link); 503 if (ret) 504 return -1; 505 if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) && 506 (strncmp(link+2, "CIS", 3) == 0)) 507 return ofs; 508 remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5); 509 /* Then, we try the wrong spot... */ 510 ofs = ofs >> 1; 511 } 512 ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link); 513 if (ret) 514 return -1; 515 if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) && 516 (strncmp(link+2, "CIS", 3) == 0)) 517 return ofs; 518 remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5); 519 return -1; 520} 521 522int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, 523 tuple_t *tuple) 524{ 525 u_char link[2], tmp; 526 int ofs, i, attr; 527 int ret; 528 529 if (!s) 530 return -EINVAL; 531 if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS)) 532 return -ENODEV; 533 534 link[1] = tuple->TupleLink; 535 ofs = tuple->CISOffset + tuple->TupleLink; 536 attr = SPACE(tuple->Flags); 537 538 for (i = 0; i < MAX_TUPLES; i++) { 539 if (link[1] == 0xff) 540 link[0] = CISTPL_END; 541 else { 542 ret = read_cis_cache(s, attr, ofs, 2, link); 543 if (ret) 544 return -1; 545 if (link[0] == CISTPL_NULL) { 546 ofs++; 547 continue; 548 } 549 } 550 551 /* End of chain? Follow long link if possible */ 552 if (link[0] == CISTPL_END) { 553 ofs = follow_link(s, tuple); 554 if (ofs < 0) 555 return -ENOSPC; 556 attr = SPACE(tuple->Flags); 557 ret = read_cis_cache(s, attr, ofs, 2, link); 558 if (ret) 559 return -1; 560 } 561 562 /* Is this a link tuple? Make a note of it */ 563 if ((link[0] == CISTPL_LONGLINK_A) || 564 (link[0] == CISTPL_LONGLINK_C) || 565 (link[0] == CISTPL_LONGLINK_MFC) || 566 (link[0] == CISTPL_LINKTARGET) || 567 (link[0] == CISTPL_INDIRECT) || 568 (link[0] == CISTPL_NO_LINK)) { 569 switch (link[0]) { 570 case CISTPL_LONGLINK_A: 571 HAS_LINK(tuple->Flags) = 1; 572 LINK_SPACE(tuple->Flags) = attr | IS_ATTR; 573 ret = read_cis_cache(s, attr, ofs+2, 4, 574 &tuple->LinkOffset); 575 if (ret) 576 return -1; 577 break; 578 case CISTPL_LONGLINK_C: 579 HAS_LINK(tuple->Flags) = 1; 580 LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR; 581 ret = read_cis_cache(s, attr, ofs+2, 4, 582 &tuple->LinkOffset); 583 if (ret) 584 return -1; 585 break; 586 case CISTPL_INDIRECT: 587 HAS_LINK(tuple->Flags) = 1; 588 LINK_SPACE(tuple->Flags) = IS_ATTR | 589 IS_INDIRECT; 590 tuple->LinkOffset = 0; 591 break; 592 case CISTPL_LONGLINK_MFC: 593 tuple->LinkOffset = ofs + 3; 594 LINK_SPACE(tuple->Flags) = attr; 595 if (function == BIND_FN_ALL) { 596 /* Follow all the MFC links */ 597 ret = read_cis_cache(s, attr, ofs+2, 598 1, &tmp); 599 if (ret) 600 return -1; 601 MFC_FN(tuple->Flags) = tmp; 602 } else { 603 /* Follow exactly one of the links */ 604 MFC_FN(tuple->Flags) = 1; 605 tuple->LinkOffset += function * 5; 606 } 607 break; 608 case CISTPL_NO_LINK: 609 HAS_LINK(tuple->Flags) = 0; 610 break; 611 } 612 if ((tuple->Attributes & TUPLE_RETURN_LINK) && 613 (tuple->DesiredTuple == RETURN_FIRST_TUPLE)) 614 break; 615 } else 616 if (tuple->DesiredTuple == RETURN_FIRST_TUPLE) 617 break; 618 619 if (link[0] == tuple->DesiredTuple) 620 break; 621 ofs += link[1] + 2; 622 } 623 if (i == MAX_TUPLES) { 624 dev_dbg(&s->dev, "cs: overrun in pcmcia_get_next_tuple\n"); 625 return -ENOSPC; 626 } 627 628 tuple->TupleCode = link[0]; 629 tuple->TupleLink = link[1]; 630 tuple->CISOffset = ofs + 2; 631 return 0; 632} 633 634int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple) 635{ 636 u_int len; 637 int ret; 638 639 if (!s) 640 return -EINVAL; 641 642 if (tuple->TupleLink < tuple->TupleOffset) 643 return -ENOSPC; 644 len = tuple->TupleLink - tuple->TupleOffset; 645 tuple->TupleDataLen = tuple->TupleLink; 646 if (len == 0) 647 return 0; 648 ret = read_cis_cache(s, SPACE(tuple->Flags), 649 tuple->CISOffset + tuple->TupleOffset, 650 min(len, (u_int) tuple->TupleDataMax), 651 tuple->TupleData); 652 if (ret) 653 return -1; 654 return 0; 655} 656 657 658/* Parsing routines for individual tuples */ 659 660static int parse_device(tuple_t *tuple, cistpl_device_t *device) 661{ 662 int i; 663 u_char scale; 664 u_char *p, *q; 665 666 p = (u_char *)tuple->TupleData; 667 q = p + tuple->TupleDataLen; 668 669 device->ndev = 0; 670 for (i = 0; i < CISTPL_MAX_DEVICES; i++) { 671 672 if (*p == 0xff) 673 break; 674 device->dev[i].type = (*p >> 4); 675 device->dev[i].wp = (*p & 0x08) ? 1 : 0; 676 switch (*p & 0x07) { 677 case 0: 678 device->dev[i].speed = 0; 679 break; 680 case 1: 681 device->dev[i].speed = 250; 682 break; 683 case 2: 684 device->dev[i].speed = 200; 685 break; 686 case 3: 687 device->dev[i].speed = 150; 688 break; 689 case 4: 690 device->dev[i].speed = 100; 691 break; 692 case 7: 693 if (++p == q) 694 return -EINVAL; 695 device->dev[i].speed = SPEED_CVT(*p); 696 while (*p & 0x80) 697 if (++p == q) 698 return -EINVAL; 699 break; 700 default: 701 return -EINVAL; 702 } 703 704 if (++p == q) 705 return -EINVAL; 706 if (*p == 0xff) 707 break; 708 scale = *p & 7; 709 if (scale == 7) 710 return -EINVAL; 711 device->dev[i].size = ((*p >> 3) + 1) * (512 << (scale*2)); 712 device->ndev++; 713 if (++p == q) 714 break; 715 } 716 717 return 0; 718} 719 720 721static int parse_checksum(tuple_t *tuple, cistpl_checksum_t *csum) 722{ 723 u_char *p; 724 if (tuple->TupleDataLen < 5) 725 return -EINVAL; 726 p = (u_char *) tuple->TupleData; 727 csum->addr = tuple->CISOffset + get_unaligned_le16(p) - 2; 728 csum->len = get_unaligned_le16(p + 2); 729 csum->sum = *(p + 4); 730 return 0; 731} 732 733 734static int parse_longlink(tuple_t *tuple, cistpl_longlink_t *link) 735{ 736 if (tuple->TupleDataLen < 4) 737 return -EINVAL; 738 link->addr = get_unaligned_le32(tuple->TupleData); 739 return 0; 740} 741 742 743static int parse_longlink_mfc(tuple_t *tuple, cistpl_longlink_mfc_t *link) 744{ 745 u_char *p; 746 int i; 747 748 p = (u_char *)tuple->TupleData; 749 750 link->nfn = *p; p++; 751 if (tuple->TupleDataLen <= link->nfn*5) 752 return -EINVAL; 753 for (i = 0; i < link->nfn; i++) { 754 link->fn[i].space = *p; p++; 755 link->fn[i].addr = get_unaligned_le32(p); 756 p += 4; 757 } 758 return 0; 759} 760 761 762static int parse_strings(u_char *p, u_char *q, int max, 763 char *s, u_char *ofs, u_char *found) 764{ 765 int i, j, ns; 766 767 if (p == q) 768 return -EINVAL; 769 ns = 0; j = 0; 770 for (i = 0; i < max; i++) { 771 if (*p == 0xff) 772 break; 773 ofs[i] = j; 774 ns++; 775 for (;;) { 776 s[j++] = (*p == 0xff) ? '\0' : *p; 777 if ((*p == '\0') || (*p == 0xff)) 778 break; 779 if (++p == q) 780 return -EINVAL; 781 } 782 if ((*p == 0xff) || (++p == q)) 783 break; 784 } 785 if (found) { 786 *found = ns; 787 return 0; 788 } 789 790 return (ns == max) ? 0 : -EINVAL; 791} 792 793 794static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1) 795{ 796 u_char *p, *q; 797 798 p = (u_char *)tuple->TupleData; 799 q = p + tuple->TupleDataLen; 800 801 vers_1->major = *p; p++; 802 vers_1->minor = *p; p++; 803 if (p >= q) 804 return -EINVAL; 805 806 return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS, 807 vers_1->str, vers_1->ofs, &vers_1->ns); 808} 809 810 811static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr) 812{ 813 u_char *p, *q; 814 815 p = (u_char *)tuple->TupleData; 816 q = p + tuple->TupleDataLen; 817 818 return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS, 819 altstr->str, altstr->ofs, &altstr->ns); 820} 821 822 823static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec) 824{ 825 u_char *p, *q; 826 int nid; 827 828 p = (u_char *)tuple->TupleData; 829 q = p + tuple->TupleDataLen; 830 831 for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) { 832 if (p > q-2) 833 break; 834 jedec->id[nid].mfr = p[0]; 835 jedec->id[nid].info = p[1]; 836 p += 2; 837 } 838 jedec->nid = nid; 839 return 0; 840} 841 842 843static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m) 844{ 845 if (tuple->TupleDataLen < 4) 846 return -EINVAL; 847 m->manf = get_unaligned_le16(tuple->TupleData); 848 m->card = get_unaligned_le16(tuple->TupleData + 2); 849 return 0; 850} 851 852 853static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f) 854{ 855 u_char *p; 856 if (tuple->TupleDataLen < 2) 857 return -EINVAL; 858 p = (u_char *)tuple->TupleData; 859 f->func = p[0]; 860 f->sysinit = p[1]; 861 return 0; 862} 863 864 865static int parse_funce(tuple_t *tuple, cistpl_funce_t *f) 866{ 867 u_char *p; 868 int i; 869 if (tuple->TupleDataLen < 1) 870 return -EINVAL; 871 p = (u_char *)tuple->TupleData; 872 f->type = p[0]; 873 for (i = 1; i < tuple->TupleDataLen; i++) 874 f->data[i-1] = p[i]; 875 return 0; 876} 877 878 879static int parse_config(tuple_t *tuple, cistpl_config_t *config) 880{ 881 int rasz, rmsz, i; 882 u_char *p; 883 884 p = (u_char *)tuple->TupleData; 885 rasz = *p & 0x03; 886 rmsz = (*p & 0x3c) >> 2; 887 if (tuple->TupleDataLen < rasz+rmsz+4) 888 return -EINVAL; 889 config->last_idx = *(++p); 890 p++; 891 config->base = 0; 892 for (i = 0; i <= rasz; i++) 893 config->base += p[i] << (8*i); 894 p += rasz+1; 895 for (i = 0; i < 4; i++) 896 config->rmask[i] = 0; 897 for (i = 0; i <= rmsz; i++) 898 config->rmask[i>>2] += p[i] << (8*(i%4)); 899 config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4); 900 return 0; 901} 902 903/* The following routines are all used to parse the nightmarish 904 * config table entries. 905 */ 906 907static u_char *parse_power(u_char *p, u_char *q, cistpl_power_t *pwr) 908{ 909 int i; 910 u_int scale; 911 912 if (p == q) 913 return NULL; 914 pwr->present = *p; 915 pwr->flags = 0; 916 p++; 917 for (i = 0; i < 7; i++) 918 if (pwr->present & (1<<i)) { 919 if (p == q) 920 return NULL; 921 pwr->param[i] = POWER_CVT(*p); 922 scale = POWER_SCALE(*p); 923 while (*p & 0x80) { 924 if (++p == q) 925 return NULL; 926 if ((*p & 0x7f) < 100) 927 pwr->param[i] += 928 (*p & 0x7f) * scale / 100; 929 else if (*p == 0x7d) 930 pwr->flags |= CISTPL_POWER_HIGHZ_OK; 931 else if (*p == 0x7e) 932 pwr->param[i] = 0; 933 else if (*p == 0x7f) 934 pwr->flags |= CISTPL_POWER_HIGHZ_REQ; 935 else 936 return NULL; 937 } 938 p++; 939 } 940 return p; 941} 942 943 944static u_char *parse_timing(u_char *p, u_char *q, cistpl_timing_t *timing) 945{ 946 u_char scale; 947 948 if (p == q) 949 return NULL; 950 scale = *p; 951 if ((scale & 3) != 3) { 952 if (++p == q) 953 return NULL; 954 timing->wait = SPEED_CVT(*p); 955 timing->waitscale = exponent[scale & 3]; 956 } else 957 timing->wait = 0; 958 scale >>= 2; 959 if ((scale & 7) != 7) { 960 if (++p == q) 961 return NULL; 962 timing->ready = SPEED_CVT(*p); 963 timing->rdyscale = exponent[scale & 7]; 964 } else 965 timing->ready = 0; 966 scale >>= 3; 967 if (scale != 7) { 968 if (++p == q) 969 return NULL; 970 timing->reserved = SPEED_CVT(*p); 971 timing->rsvscale = exponent[scale]; 972 } else 973 timing->reserved = 0; 974 p++; 975 return p; 976} 977 978 979static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io) 980{ 981 int i, j, bsz, lsz; 982 983 if (p == q) 984 return NULL; 985 io->flags = *p; 986 987 if (!(*p & 0x80)) { 988 io->nwin = 1; 989 io->win[0].base = 0; 990 io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK)); 991 return p+1; 992 } 993 994 if (++p == q) 995 return NULL; 996 io->nwin = (*p & 0x0f) + 1; 997 bsz = (*p & 0x30) >> 4; 998 if (bsz == 3) 999 bsz++; 1000 lsz = (*p & 0xc0) >> 6; 1001 if (lsz == 3) 1002 lsz++; 1003 p++; 1004 1005 for (i = 0; i < io->nwin; i++) { 1006 io->win[i].base = 0; 1007 io->win[i].len = 1; 1008 for (j = 0; j < bsz; j++, p++) { 1009 if (p == q) 1010 return NULL; 1011 io->win[i].base += *p << (j*8); 1012 } 1013 for (j = 0; j < lsz; j++, p++) { 1014 if (p == q) 1015 return NULL; 1016 io->win[i].len += *p << (j*8); 1017 } 1018 } 1019 return p; 1020} 1021 1022 1023static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem) 1024{ 1025 int i, j, asz, lsz, has_ha; 1026 u_int len, ca, ha; 1027 1028 if (p == q) 1029 return NULL; 1030 1031 mem->nwin = (*p & 0x07) + 1; 1032 lsz = (*p & 0x18) >> 3; 1033 asz = (*p & 0x60) >> 5; 1034 has_ha = (*p & 0x80); 1035 if (++p == q) 1036 return NULL; 1037 1038 for (i = 0; i < mem->nwin; i++) { 1039 len = ca = ha = 0; 1040 for (j = 0; j < lsz; j++, p++) { 1041 if (p == q) 1042 return NULL; 1043 len += *p << (j*8); 1044 } 1045 for (j = 0; j < asz; j++, p++) { 1046 if (p == q) 1047 return NULL; 1048 ca += *p << (j*8); 1049 } 1050 if (has_ha) 1051 for (j = 0; j < asz; j++, p++) { 1052 if (p == q) 1053 return NULL; 1054 ha += *p << (j*8); 1055 } 1056 mem->win[i].len = len << 8; 1057 mem->win[i].card_addr = ca << 8; 1058 mem->win[i].host_addr = ha << 8; 1059 } 1060 return p; 1061} 1062 1063 1064static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq) 1065{ 1066 if (p == q) 1067 return NULL; 1068 irq->IRQInfo1 = *p; p++; 1069 if (irq->IRQInfo1 & IRQ_INFO2_VALID) { 1070 if (p+2 > q) 1071 return NULL; 1072 irq->IRQInfo2 = (p[1]<<8) + p[0]; 1073 p += 2; 1074 } 1075 return p; 1076} 1077 1078 1079static int parse_cftable_entry(tuple_t *tuple, 1080 cistpl_cftable_entry_t *entry) 1081{ 1082 u_char *p, *q, features; 1083 1084 p = tuple->TupleData; 1085 q = p + tuple->TupleDataLen; 1086 entry->index = *p & 0x3f; 1087 entry->flags = 0; 1088 if (*p & 0x40) 1089 entry->flags |= CISTPL_CFTABLE_DEFAULT; 1090 if (*p & 0x80) { 1091 if (++p == q) 1092 return -EINVAL; 1093 if (*p & 0x10) 1094 entry->flags |= CISTPL_CFTABLE_BVDS; 1095 if (*p & 0x20) 1096 entry->flags |= CISTPL_CFTABLE_WP; 1097 if (*p & 0x40) 1098 entry->flags |= CISTPL_CFTABLE_RDYBSY; 1099 if (*p & 0x80) 1100 entry->flags |= CISTPL_CFTABLE_MWAIT; 1101 entry->interface = *p & 0x0f; 1102 } else 1103 entry->interface = 0; 1104 1105 /* Process optional features */ 1106 if (++p == q) 1107 return -EINVAL; 1108 features = *p; p++; 1109 1110 /* Power options */ 1111 if ((features & 3) > 0) { 1112 p = parse_power(p, q, &entry->vcc); 1113 if (p == NULL) 1114 return -EINVAL; 1115 } else 1116 entry->vcc.present = 0; 1117 if ((features & 3) > 1) { 1118 p = parse_power(p, q, &entry->vpp1); 1119 if (p == NULL) 1120 return -EINVAL; 1121 } else 1122 entry->vpp1.present = 0; 1123 if ((features & 3) > 2) { 1124 p = parse_power(p, q, &entry->vpp2); 1125 if (p == NULL) 1126 return -EINVAL; 1127 } else 1128 entry->vpp2.present = 0; 1129 1130 /* Timing options */ 1131 if (features & 0x04) { 1132 p = parse_timing(p, q, &entry->timing); 1133 if (p == NULL) 1134 return -EINVAL; 1135 } else { 1136 entry->timing.wait = 0; 1137 entry->timing.ready = 0; 1138 entry->timing.reserved = 0; 1139 } 1140 1141 /* I/O window options */ 1142 if (features & 0x08) { 1143 p = parse_io(p, q, &entry->io); 1144 if (p == NULL) 1145 return -EINVAL; 1146 } else 1147 entry->io.nwin = 0; 1148 1149 /* Interrupt options */ 1150 if (features & 0x10) { 1151 p = parse_irq(p, q, &entry->irq); 1152 if (p == NULL) 1153 return -EINVAL; 1154 } else 1155 entry->irq.IRQInfo1 = 0; 1156 1157 switch (features & 0x60) { 1158 case 0x00: 1159 entry->mem.nwin = 0; 1160 break; 1161 case 0x20: 1162 entry->mem.nwin = 1; 1163 entry->mem.win[0].len = get_unaligned_le16(p) << 8; 1164 entry->mem.win[0].card_addr = 0; 1165 entry->mem.win[0].host_addr = 0; 1166 p += 2; 1167 if (p > q) 1168 return -EINVAL; 1169 break; 1170 case 0x40: 1171 entry->mem.nwin = 1; 1172 entry->mem.win[0].len = get_unaligned_le16(p) << 8; 1173 entry->mem.win[0].card_addr = get_unaligned_le16(p + 2) << 8; 1174 entry->mem.win[0].host_addr = 0; 1175 p += 4; 1176 if (p > q) 1177 return -EINVAL; 1178 break; 1179 case 0x60: 1180 p = parse_mem(p, q, &entry->mem); 1181 if (p == NULL) 1182 return -EINVAL; 1183 break; 1184 } 1185 1186 /* Misc features */ 1187 if (features & 0x80) { 1188 if (p == q) 1189 return -EINVAL; 1190 entry->flags |= (*p << 8); 1191 while (*p & 0x80) 1192 if (++p == q) 1193 return -EINVAL; 1194 p++; 1195 } 1196 1197 entry->subtuples = q-p; 1198 1199 return 0; 1200} 1201 1202 1203static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo) 1204{ 1205 u_char *p, *q; 1206 int n; 1207 1208 p = (u_char *)tuple->TupleData; 1209 q = p + tuple->TupleDataLen; 1210 1211 for (n = 0; n < CISTPL_MAX_DEVICES; n++) { 1212 if (p > q-6) 1213 break; 1214 geo->geo[n].buswidth = p[0]; 1215 geo->geo[n].erase_block = 1 << (p[1]-1); 1216 geo->geo[n].read_block = 1 << (p[2]-1); 1217 geo->geo[n].write_block = 1 << (p[3]-1); 1218 geo->geo[n].partition = 1 << (p[4]-1); 1219 geo->geo[n].interleave = 1 << (p[5]-1); 1220 p += 6; 1221 } 1222 geo->ngeo = n; 1223 return 0; 1224} 1225 1226 1227static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2) 1228{ 1229 u_char *p, *q; 1230 1231 if (tuple->TupleDataLen < 10) 1232 return -EINVAL; 1233 1234 p = tuple->TupleData; 1235 q = p + tuple->TupleDataLen; 1236 1237 v2->vers = p[0]; 1238 v2->comply = p[1]; 1239 v2->dindex = get_unaligned_le16(p + 2); 1240 v2->vspec8 = p[6]; 1241 v2->vspec9 = p[7]; 1242 v2->nhdr = p[8]; 1243 p += 9; 1244 return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL); 1245} 1246 1247 1248static int parse_org(tuple_t *tuple, cistpl_org_t *org) 1249{ 1250 u_char *p, *q; 1251 int i; 1252 1253 p = tuple->TupleData; 1254 q = p + tuple->TupleDataLen; 1255 if (p == q) 1256 return -EINVAL; 1257 org->data_org = *p; 1258 if (++p == q) 1259 return -EINVAL; 1260 for (i = 0; i < 30; i++) { 1261 org->desc[i] = *p; 1262 if (*p == '\0') 1263 break; 1264 if (++p == q) 1265 return -EINVAL; 1266 } 1267 return 0; 1268} 1269 1270 1271static int parse_format(tuple_t *tuple, cistpl_format_t *fmt) 1272{ 1273 u_char *p; 1274 1275 if (tuple->TupleDataLen < 10) 1276 return -EINVAL; 1277 1278 p = tuple->TupleData; 1279 1280 fmt->type = p[0]; 1281 fmt->edc = p[1]; 1282 fmt->offset = get_unaligned_le32(p + 2); 1283 fmt->length = get_unaligned_le32(p + 6); 1284 1285 return 0; 1286} 1287 1288 1289int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse) 1290{ 1291 int ret = 0; 1292 1293 if (tuple->TupleDataLen > tuple->TupleDataMax) 1294 return -EINVAL; 1295 switch (tuple->TupleCode) { 1296 case CISTPL_DEVICE: 1297 case CISTPL_DEVICE_A: 1298 ret = parse_device(tuple, &parse->device); 1299 break; 1300 case CISTPL_CHECKSUM: 1301 ret = parse_checksum(tuple, &parse->checksum); 1302 break; 1303 case CISTPL_LONGLINK_A: 1304 case CISTPL_LONGLINK_C: 1305 ret = parse_longlink(tuple, &parse->longlink); 1306 break; 1307 case CISTPL_LONGLINK_MFC: 1308 ret = parse_longlink_mfc(tuple, &parse->longlink_mfc); 1309 break; 1310 case CISTPL_VERS_1: 1311 ret = parse_vers_1(tuple, &parse->version_1); 1312 break; 1313 case CISTPL_ALTSTR: 1314 ret = parse_altstr(tuple, &parse->altstr); 1315 break; 1316 case CISTPL_JEDEC_A: 1317 case CISTPL_JEDEC_C: 1318 ret = parse_jedec(tuple, &parse->jedec); 1319 break; 1320 case CISTPL_MANFID: 1321 ret = parse_manfid(tuple, &parse->manfid); 1322 break; 1323 case CISTPL_FUNCID: 1324 ret = parse_funcid(tuple, &parse->funcid); 1325 break; 1326 case CISTPL_FUNCE: 1327 ret = parse_funce(tuple, &parse->funce); 1328 break; 1329 case CISTPL_CONFIG: 1330 ret = parse_config(tuple, &parse->config); 1331 break; 1332 case CISTPL_CFTABLE_ENTRY: 1333 ret = parse_cftable_entry(tuple, &parse->cftable_entry); 1334 break; 1335 case CISTPL_DEVICE_GEO: 1336 case CISTPL_DEVICE_GEO_A: 1337 ret = parse_device_geo(tuple, &parse->device_geo); 1338 break; 1339 case CISTPL_VERS_2: 1340 ret = parse_vers_2(tuple, &parse->vers_2); 1341 break; 1342 case CISTPL_ORG: 1343 ret = parse_org(tuple, &parse->org); 1344 break; 1345 case CISTPL_FORMAT: 1346 case CISTPL_FORMAT_A: 1347 ret = parse_format(tuple, &parse->format); 1348 break; 1349 case CISTPL_NO_LINK: 1350 case CISTPL_LINKTARGET: 1351 ret = 0; 1352 break; 1353 default: 1354 ret = -EINVAL; 1355 break; 1356 } 1357 if (ret) 1358 pr_debug("parse_tuple failed %d\n", ret); 1359 return ret; 1360} 1361EXPORT_SYMBOL(pcmcia_parse_tuple); 1362 1363 1364/** 1365 * pccard_validate_cis() - check whether card has a sensible CIS 1366 * @s: the struct pcmcia_socket we are to check 1367 * @info: returns the number of tuples in the (valid) CIS, or 0 1368 * 1369 * This tries to determine if a card has a sensible CIS. In @info, it 1370 * returns the number of tuples in the CIS, or 0 if the CIS looks bad. The 1371 * checks include making sure several critical tuples are present and 1372 * valid; seeing if the total number of tuples is reasonable; and 1373 * looking for tuples that use reserved codes. 1374 * 1375 * The function returns 0 on success. 1376 */ 1377int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info) 1378{ 1379 tuple_t *tuple; 1380 cisparse_t *p; 1381 unsigned int count = 0; 1382 int ret, reserved, dev_ok = 0, ident_ok = 0; 1383 1384 if (!s) 1385 return -EINVAL; 1386 1387 if (s->functions) { 1388 WARN_ON(1); 1389 return -EINVAL; 1390 } 1391 1392 /* We do not want to validate the CIS cache... */ 1393 mutex_lock(&s->ops_mutex); 1394 destroy_cis_cache(s); 1395 mutex_unlock(&s->ops_mutex); 1396 1397 tuple = kmalloc(sizeof(*tuple), GFP_KERNEL); 1398 if (tuple == NULL) { 1399 dev_warn(&s->dev, "no memory to validate CIS\n"); 1400 return -ENOMEM; 1401 } 1402 p = kmalloc(sizeof(*p), GFP_KERNEL); 1403 if (p == NULL) { 1404 kfree(tuple); 1405 dev_warn(&s->dev, "no memory to validate CIS\n"); 1406 return -ENOMEM; 1407 } 1408 1409 count = reserved = 0; 1410 tuple->DesiredTuple = RETURN_FIRST_TUPLE; 1411 tuple->Attributes = TUPLE_RETURN_COMMON; 1412 ret = pccard_get_first_tuple(s, BIND_FN_ALL, tuple); 1413 if (ret != 0) 1414 goto done; 1415 1416 /* First tuple should be DEVICE; we should really have either that 1417 or a CFTABLE_ENTRY of some sort */ 1418 if ((tuple->TupleCode == CISTPL_DEVICE) || 1419 (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY, p)) || 1420 (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY_CB, p))) 1421 dev_ok++; 1422 1423 /* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2 1424 tuple, for card identification. Certain old D-Link and Linksys 1425 cards have only a broken VERS_2 tuple; hence the bogus test. */ 1426 if ((pccard_read_tuple(s, BIND_FN_ALL, CISTPL_MANFID, p) == 0) || 1427 (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_1, p) == 0) || 1428 (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_2, p) != -ENOSPC)) 1429 ident_ok++; 1430 1431 if (!dev_ok && !ident_ok) 1432 goto done; 1433 1434 for (count = 1; count < MAX_TUPLES; count++) { 1435 ret = pccard_get_next_tuple(s, BIND_FN_ALL, tuple); 1436 if (ret != 0) 1437 break; 1438 if (((tuple->TupleCode > 0x23) && (tuple->TupleCode < 0x40)) || 1439 ((tuple->TupleCode > 0x47) && (tuple->TupleCode < 0x80)) || 1440 ((tuple->TupleCode > 0x90) && (tuple->TupleCode < 0xff))) 1441 reserved++; 1442 } 1443 if ((count == MAX_TUPLES) || (reserved > 5) || 1444 ((!dev_ok || !ident_ok) && (count > 10))) 1445 count = 0; 1446 1447 ret = 0; 1448 1449done: 1450 /* invalidate CIS cache on failure */ 1451 if (!dev_ok || !ident_ok || !count) { 1452 mutex_lock(&s->ops_mutex); 1453 destroy_cis_cache(s); 1454 mutex_unlock(&s->ops_mutex); 1455 ret = -EIO; 1456 } 1457 1458 if (info) 1459 *info = count; 1460 kfree(tuple); 1461 kfree(p); 1462 return ret; 1463} 1464 1465 1466#define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev) 1467 1468static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, 1469 loff_t off, size_t count) 1470{ 1471 tuple_t tuple; 1472 int status, i; 1473 loff_t pointer = 0; 1474 ssize_t ret = 0; 1475 u_char *tuplebuffer; 1476 u_char *tempbuffer; 1477 1478 tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL); 1479 if (!tuplebuffer) 1480 return -ENOMEM; 1481 1482 tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL); 1483 if (!tempbuffer) { 1484 ret = -ENOMEM; 1485 goto free_tuple; 1486 } 1487 1488 memset(&tuple, 0, sizeof(tuple_t)); 1489 1490 tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON; 1491 tuple.DesiredTuple = RETURN_FIRST_TUPLE; 1492 tuple.TupleOffset = 0; 1493 1494 status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple); 1495 while (!status) { 1496 tuple.TupleData = tuplebuffer; 1497 tuple.TupleDataMax = 255; 1498 memset(tuplebuffer, 0, sizeof(u_char) * 255); 1499 1500 status = pccard_get_tuple_data(s, &tuple); 1501 if (status) 1502 break; 1503 1504 if (off < (pointer + 2 + tuple.TupleDataLen)) { 1505 tempbuffer[0] = tuple.TupleCode & 0xff; 1506 tempbuffer[1] = tuple.TupleLink & 0xff; 1507 for (i = 0; i < tuple.TupleDataLen; i++) 1508 tempbuffer[i + 2] = tuplebuffer[i] & 0xff; 1509 1510 for (i = 0; i < (2 + tuple.TupleDataLen); i++) { 1511 if (((i + pointer) >= off) && 1512 (i + pointer) < (off + count)) { 1513 buf[ret] = tempbuffer[i]; 1514 ret++; 1515 } 1516 } 1517 } 1518 1519 pointer += 2 + tuple.TupleDataLen; 1520 1521 if (pointer >= (off + count)) 1522 break; 1523 1524 if (tuple.TupleCode == CISTPL_END) 1525 break; 1526 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple); 1527 } 1528 1529 kfree(tempbuffer); 1530 free_tuple: 1531 kfree(tuplebuffer); 1532 1533 return ret; 1534} 1535 1536 1537static ssize_t pccard_show_cis(struct file *filp, struct kobject *kobj, 1538 struct bin_attribute *bin_attr, 1539 char *buf, loff_t off, size_t count) 1540{ 1541 unsigned int size = 0x200; 1542 1543 if (off >= size) 1544 count = 0; 1545 else { 1546 struct pcmcia_socket *s; 1547 unsigned int chains = 1; 1548 1549 if (off + count > size) 1550 count = size - off; 1551 1552 s = to_socket(container_of(kobj, struct device, kobj)); 1553 1554 if (!(s->state & SOCKET_PRESENT)) 1555 return -ENODEV; 1556 if (!s->functions && pccard_validate_cis(s, &chains)) 1557 return -EIO; 1558 if (!chains) 1559 return -ENODATA; 1560 1561 count = pccard_extract_cis(s, buf, off, count); 1562 } 1563 1564 return count; 1565} 1566 1567 1568static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj, 1569 struct bin_attribute *bin_attr, 1570 char *buf, loff_t off, size_t count) 1571{ 1572 struct pcmcia_socket *s; 1573 int error; 1574 1575 s = to_socket(container_of(kobj, struct device, kobj)); 1576 1577 if (off) 1578 return -EINVAL; 1579 1580 if (count >= CISTPL_MAX_CIS_SIZE) 1581 return -EINVAL; 1582 1583 if (!(s->state & SOCKET_PRESENT)) 1584 return -ENODEV; 1585 1586 error = pcmcia_replace_cis(s, buf, count); 1587 if (error) 1588 return -EIO; 1589 1590 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 1591 1592 return count; 1593} 1594 1595 1596struct bin_attribute pccard_cis_attr = { 1597 .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR }, 1598 .size = 0x200, 1599 .read = pccard_show_cis, 1600 .write = pccard_store_cis, 1601}; 1602