drivers/pcmcia/cistpl.c

   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 <asm/io.h>
  27 #include <asm/byteorder.h>
  28
  29 #include <pcmcia/cs_types.h>
  30 #include <pcmcia/ss.h>
  31 #include <pcmcia/cs.h>
  32 #include <pcmcia/bulkmem.h>
  33 #include <pcmcia/cisreg.h>
  34 #include <pcmcia/cistpl.h>
  35 #include "cs_internal.h"
  36
  37 static const u_char mantissa[] = {
  38     10, 12, 13, 15, 20, 25, 30, 35,
  39     40, 45, 50, 55, 60, 70, 80, 90
  40 };
  41
  42 static const u_int exponent[] = {
  43     1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
  44 };
  45
  46 /* Convert an extended speed byte to a time in nanoseconds */
  47 #define SPEED_CVT(v) \
  48     (mantissa[(((v)>>3)&15)-1] * exponent[(v)&7] / 10)
  49 /* Convert a power byte to a current in 0.1 microamps */
  50 #define POWER_CVT(v) \
  51     (mantissa[((v)>>3)&15] * exponent[(v)&7] / 10)
  52 #define POWER_SCALE(v)          (exponent[(v)&7])
  53
  54 /* Upper limit on reasonable # of tuples */
  55 #define MAX_TUPLES              200
  56
  57 /*====================================================================*/
  58
  59 /* Parameters that can be set with 'insmod' */
  60
  61 /* 16-bit CIS? */
  62 static int cis_width;
  63 module_param(cis_width, int, 0444);
  64
  65 void release_cis_mem(struct pcmcia_socket *s)
  66 {
  67     if (s->cis_mem.flags & MAP_ACTIVE) {
  68         s->cis_mem.flags &= ~MAP_ACTIVE;
  69         s->ops->set_mem_map(s, &s->cis_mem);
  70         if (s->cis_mem.res) {
  71             release_resource(s->cis_mem.res);
  72             kfree(s->cis_mem.res);
  73             s->cis_mem.res = NULL;
  74         }
  75         iounmap(s->cis_virt);
  76         s->cis_virt = NULL;
  77     }
  78 }
  79 EXPORT_SYMBOL(release_cis_mem);
  80
  81 /*
  82  * Map the card memory at "card_offset" into virtual space.
  83  * If flags & MAP_ATTRIB, map the attribute space, otherwise
  84  * map the memory space.
  85  */
  86 static void __iomem *
  87 set_cis_map(struct pcmcia_socket *s, unsigned int card_offset, unsigned int flags)
  88 {
  89         pccard_mem_map *mem = &s->cis_mem;
  90         int ret;
  91
  92         if (!(s->features & SS_CAP_STATIC_MAP) && (mem->res == NULL)) {
  93                 mem->res = pcmcia_find_mem_region(0, s->map_size, s->map_size, 0, s);
  94                 if (mem->res == NULL) {
  95                         printk(KERN_NOTICE "cs: unable to map card memory!\n");
  96                         return NULL;
  97                 }
  98                 s->cis_virt = NULL;
  99         }
 100
 101         if (!(s->features & SS_CAP_STATIC_MAP) && (!s->cis_virt))
 102                 s->cis_virt = ioremap(mem->res->start, s->map_size);
 103
 104         mem->card_start = card_offset;
 105         mem->flags = flags;
 106
 107         ret = s->ops->set_mem_map(s, mem);
 108         if (ret) {
 109                 iounmap(s->cis_virt);
 110                 s->cis_virt = NULL;
 111                 return NULL;
 112         }
 113
 114         if (s->features & SS_CAP_STATIC_MAP) {
 115                 if (s->cis_virt)
 116                         iounmap(s->cis_virt);
 117                 s->cis_virt = ioremap(mem->static_start, s->map_size);
 118         }
 119
 120         return s->cis_virt;
 121 }
 122
 123 /*======================================================================
 124
 125     Low-level functions to read and write CIS memory.  I think the
 126     write routine is only useful for writing one-byte registers.
 127
 128 ======================================================================*/
 129
 130 /* Bits in attr field */
 131 #define IS_ATTR         1
 132 #define IS_INDIRECT     8
 133
 134 int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
 135                  u_int len, void *ptr)
 136 {
 137     void __iomem *sys, *end;
 138     unsigned char *buf = ptr;
 139
 140     cs_dbg(s, 3, "pcmcia_read_cis_mem(%d, %#x, %u)\n", attr, addr, len);
 141
 142     if (attr & IS_INDIRECT) {
 143         /* Indirect accesses use a bunch of special registers at fixed
 144            locations in common memory */
 145         u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
 146         if (attr & IS_ATTR) {
 147             addr *= 2;
 148             flags = ICTRL0_AUTOINC;
 149         }
 150
 151         sys = set_cis_map(s, 0, MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0));
 152         if (!sys) {
 153             memset(ptr, 0xff, len);
 154             return -1;
 155         }
 156
 157         writeb(flags, sys+CISREG_ICTRL0);
 158         writeb(addr & 0xff, sys+CISREG_IADDR0);
 159         writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
 160         writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
 161         writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
 162         for ( ; len > 0; len--, buf++)
 163             *buf = readb(sys+CISREG_IDATA0);
 164     } else {
 165         u_int inc = 1, card_offset, flags;
 166
 167         flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
 168         if (attr) {
 169             flags |= MAP_ATTRIB;
 170             inc++;
 171             addr *= 2;
 172         }
 173
 174         card_offset = addr & ~(s->map_size-1);
 175         while (len) {
 176             sys = set_cis_map(s, card_offset, flags);
 177             if (!sys) {
 178                 memset(ptr, 0xff, len);
 179                 return -1;
 180             }
 181             end = sys + s->map_size;
 182             sys = sys + (addr & (s->map_size-1));
 183             for ( ; len > 0; len--, buf++, sys += inc) {
 184                 if (sys == end)
 185                     break;
 186                 *buf = readb(sys);
 187             }
 188             card_offset += s->map_size;
 189             addr = 0;
 190         }
 191     }
 192     cs_dbg(s, 3, "  %#2.2x %#2.2x %#2.2x %#2.2x ...\n",
 193           *(u_char *)(ptr+0), *(u_char *)(ptr+1),
 194           *(u_char *)(ptr+2), *(u_char *)(ptr+3));
 195     return 0;
 196 }
 197 EXPORT_SYMBOL(pcmcia_read_cis_mem);
 198
 199
 200 void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
 201                    u_int len, void *ptr)
 202 {
 203     void __iomem *sys, *end;
 204     unsigned char *buf = ptr;
 205
 206     cs_dbg(s, 3, "pcmcia_write_cis_mem(%d, %#x, %u)\n", attr, addr, len);
 207
 208     if (attr & IS_INDIRECT) {
 209         /* Indirect accesses use a bunch of special registers at fixed
 210            locations in common memory */
 211         u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
 212         if (attr & IS_ATTR) {
 213             addr *= 2;
 214             flags = ICTRL0_AUTOINC;
 215         }
 216
 217         sys = set_cis_map(s, 0, MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0));
 218         if (!sys)
 219                 return; /* FIXME: Error */
 220
 221         writeb(flags, sys+CISREG_ICTRL0);
 222         writeb(addr & 0xff, sys+CISREG_IADDR0);
 223         writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
 224         writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
 225         writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
 226         for ( ; len > 0; len--, buf++)
 227             writeb(*buf, sys+CISREG_IDATA0);
 228     } else {
 229         u_int inc = 1, card_offset, flags;
 230
 231         flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
 232         if (attr & IS_ATTR) {
 233             flags |= MAP_ATTRIB;
 234             inc++;
 235             addr *= 2;
 236         }
 237
 238         card_offset = addr & ~(s->map_size-1);
 239         while (len) {
 240             sys = set_cis_map(s, card_offset, flags);
 241             if (!sys)
 242                 return; /* FIXME: error */
 243
 244             end = sys + s->map_size;
 245             sys = sys + (addr & (s->map_size-1));
 246             for ( ; len > 0; len--, buf++, sys += inc) {
 247                 if (sys == end)
 248                     break;
 249                 writeb(*buf, sys);
 250             }
 251             card_offset += s->map_size;
 252             addr = 0;
 253         }
 254     }
 255 }
 256 EXPORT_SYMBOL(pcmcia_write_cis_mem);
 257
 258
 259 /*======================================================================
 260
 261     This is a wrapper around read_cis_mem, with the same interface,
 262     but which caches information, for cards whose CIS may not be
 263     readable all the time.
 264
 265 ======================================================================*/
 266
 267 static void read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
 268                            u_int len, void *ptr)
 269 {
 270     struct cis_cache_entry *cis;
 271     int ret;
 272
 273     if (s->fake_cis) {
 274         if (s->fake_cis_len > addr+len)
 275             memcpy(ptr, s->fake_cis+addr, len);
 276         else
 277             memset(ptr, 0xff, len);
 278         return;
 279     }
 280
 281     list_for_each_entry(cis, &s->cis_cache, node) {
 282         if (cis->addr == addr && cis->len == len && cis->attr == attr) {
 283             memcpy(ptr, cis->cache, len);
 284             return;
 285         }
 286     }
 287
 288 #ifdef CONFIG_CARDBUS
 289     if (s->state & SOCKET_CARDBUS)
 290         ret = read_cb_mem(s, attr, addr, len, ptr);
 291     else
 292 #endif
 293         ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr);
 294
 295         if (ret == 0) {
 296                 /* Copy data into the cache */
 297                 cis = kmalloc(sizeof(struct cis_cache_entry) + len, GFP_KERNEL);
 298                 if (cis) {
 299                         cis->addr = addr;
 300                         cis->len = len;
 301                         cis->attr = attr;
 302                         memcpy(cis->cache, ptr, len);
 303                         list_add(&cis->node, &s->cis_cache);
 304                 }
 305         }
 306 }
 307
 308 static void
 309 remove_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, u_int len)
 310 {
 311         struct cis_cache_entry *cis;
 312
 313         list_for_each_entry(cis, &s->cis_cache, node)
 314                 if (cis->addr == addr && cis->len == len && cis->attr == attr) {
 315                         list_del(&cis->node);
 316                         kfree(cis);
 317                         break;
 318                 }
 319 }
 320
 321 void destroy_cis_cache(struct pcmcia_socket *s)
 322 {
 323         struct list_head *l, *n;
 324
 325         list_for_each_safe(l, n, &s->cis_cache) {
 326                 struct cis_cache_entry *cis = list_entry(l, struct cis_cache_entry, node);
 327
 328                 list_del(&cis->node);
 329                 kfree(cis);
 330         }
 331
 332         /*
 333          * If there was a fake CIS, destroy that as well.
 334          */
 335         kfree(s->fake_cis);
 336         s->fake_cis = NULL;
 337 }
 338 EXPORT_SYMBOL(destroy_cis_cache);
 339
 340 /*======================================================================
 341
 342     This verifies if the CIS of a card matches what is in the CIS
 343     cache.
 344
 345 ======================================================================*/
 346
 347 int verify_cis_cache(struct pcmcia_socket *s)
 348 {
 349         struct cis_cache_entry *cis;
 350         char *buf;
 351
 352         buf = kmalloc(256, GFP_KERNEL);
 353         if (buf == NULL)
 354                 return -1;
 355         list_for_each_entry(cis, &s->cis_cache, node) {
 356                 int len = cis->len;
 357
 358                 if (len > 256)
 359                         len = 256;
 360 #ifdef CONFIG_CARDBUS
 361                 if (s->state & SOCKET_CARDBUS)
 362                         read_cb_mem(s, cis->attr, cis->addr, len, buf);
 363                 else
 364 #endif
 365                         pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
 366
 367                 if (memcmp(buf, cis->cache, len) != 0) {
 368                         kfree(buf);
 369                         return -1;
 370                 }
 371         }
 372         kfree(buf);
 373         return 0;
 374 }
 375
 376 /*======================================================================
 377
 378     For really bad cards, we provide a facility for uploading a
 379     replacement CIS.
 380
 381 ======================================================================*/
 382
 383 int pcmcia_replace_cis(struct pcmcia_socket *s, cisdump_t *cis)
 384 {
 385     kfree(s->fake_cis);
 386     s->fake_cis = NULL;
 387     if (cis->Length > CISTPL_MAX_CIS_SIZE)
 388         return CS_BAD_SIZE;
 389     s->fake_cis = kmalloc(cis->Length, GFP_KERNEL);
 390     if (s->fake_cis == NULL)
 391         return CS_OUT_OF_RESOURCE;
 392     s->fake_cis_len = cis->Length;
 393     memcpy(s->fake_cis, cis->Data, cis->Length);
 394     return CS_SUCCESS;
 395 }
 396 EXPORT_SYMBOL(pcmcia_replace_cis);
 397
 398 /*======================================================================
 399
 400     The high-level CIS tuple services
 401
 402 ======================================================================*/
 403
 404 typedef struct tuple_flags {
 405     u_int               link_space:4;
 406     u_int               has_link:1;
 407     u_int               mfc_fn:3;
 408     u_int               space:4;
 409 } tuple_flags;
 410
 411 #define LINK_SPACE(f)   (((tuple_flags *)(&(f)))->link_space)
 412 #define HAS_LINK(f)     (((tuple_flags *)(&(f)))->has_link)
 413 #define MFC_FN(f)       (((tuple_flags *)(&(f)))->mfc_fn)
 414 #define SPACE(f)        (((tuple_flags *)(&(f)))->space)
 415
 416 int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int func, tuple_t *tuple);
 417
 418 int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function, tuple_t *tuple)
 419 {
 420     if (!s)
 421         return CS_BAD_HANDLE;
 422     if (!(s->state & SOCKET_PRESENT))
 423         return CS_NO_CARD;
 424     tuple->TupleLink = tuple->Flags = 0;
 425 #ifdef CONFIG_CARDBUS
 426     if (s->state & SOCKET_CARDBUS) {
 427         struct pci_dev *dev = s->cb_dev;
 428         u_int ptr;
 429         pci_bus_read_config_dword(dev->subordinate, 0, PCI_CARDBUS_CIS, &ptr);
 430         tuple->CISOffset = ptr & ~7;
 431         SPACE(tuple->Flags) = (ptr & 7);
 432     } else
 433 #endif
 434     {
 435         /* Assume presence of a LONGLINK_C to address 0 */
 436         tuple->CISOffset = tuple->LinkOffset = 0;
 437         SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
 438     }
 439     if (!(s->state & SOCKET_CARDBUS) && (s->functions > 1) &&
 440         !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
 441         cisdata_t req = tuple->DesiredTuple;
 442         tuple->DesiredTuple = CISTPL_LONGLINK_MFC;
 443         if (pccard_get_next_tuple(s, function, tuple) == CS_SUCCESS) {
 444             tuple->DesiredTuple = CISTPL_LINKTARGET;
 445             if (pccard_get_next_tuple(s, function, tuple) != CS_SUCCESS)
 446                 return CS_NO_MORE_ITEMS;
 447         } else
 448             tuple->CISOffset = tuple->TupleLink = 0;
 449         tuple->DesiredTuple = req;
 450     }
 451     return pccard_get_next_tuple(s, function, tuple);
 452 }
 453 EXPORT_SYMBOL(pccard_get_first_tuple);
 454
 455 static int follow_link(struct pcmcia_socket *s, tuple_t *tuple)
 456 {
 457     u_char link[5];
 458     u_int ofs;
 459
 460     if (MFC_FN(tuple->Flags)) {
 461         /* Get indirect link from the MFC tuple */
 462         read_cis_cache(s, LINK_SPACE(tuple->Flags),
 463                        tuple->LinkOffset, 5, link);
 464         ofs = le32_to_cpu(*(__le32 *)(link+1));
 465         SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR);
 466         /* Move to the next indirect link */
 467         tuple->LinkOffset += 5;
 468         MFC_FN(tuple->Flags)--;
 469     } else if (HAS_LINK(tuple->Flags)) {
 470         ofs = tuple->LinkOffset;
 471         SPACE(tuple->Flags) = LINK_SPACE(tuple->Flags);
 472         HAS_LINK(tuple->Flags) = 0;
 473     } else {
 474         return -1;
 475     }
 476     if (!(s->state & SOCKET_CARDBUS) && SPACE(tuple->Flags)) {
 477         /* This is ugly, but a common CIS error is to code the long
 478            link offset incorrectly, so we check the right spot... */
 479         read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
 480         if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
 481             (strncmp(link+2, "CIS", 3) == 0))
 482             return ofs;
 483         remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
 484         /* Then, we try the wrong spot... */
 485         ofs = ofs >> 1;
 486     }
 487     read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
 488     if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
 489         (strncmp(link+2, "CIS", 3) == 0))
 490         return ofs;
 491     remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
 492     return -1;
 493 }
 494
 495 int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_t *tuple)
 496 {
 497     u_char link[2], tmp;
 498     int ofs, i, attr;
 499
 500     if (!s)
 501         return CS_BAD_HANDLE;
 502     if (!(s->state & SOCKET_PRESENT))
 503         return CS_NO_CARD;
 504
 505     link[1] = tuple->TupleLink;
 506     ofs = tuple->CISOffset + tuple->TupleLink;
 507     attr = SPACE(tuple->Flags);
 508
 509     for (i = 0; i < MAX_TUPLES; i++) {
 510         if (link[1] == 0xff) {
 511             link[0] = CISTPL_END;
 512         } else {
 513             read_cis_cache(s, attr, ofs, 2, link);
 514             if (link[0] == CISTPL_NULL) {
 515                 ofs++; continue;
 516             }
 517         }
 518
 519         /* End of chain?  Follow long link if possible */
 520         if (link[0] == CISTPL_END) {
 521             if ((ofs = follow_link(s, tuple)) < 0)
 522                 return CS_NO_MORE_ITEMS;
 523             attr = SPACE(tuple->Flags);
 524             read_cis_cache(s, attr, ofs, 2, link);
 525         }
 526
 527         /* Is this a link tuple?  Make a note of it */
 528         if ((link[0] == CISTPL_LONGLINK_A) ||
 529             (link[0] == CISTPL_LONGLINK_C) ||
 530             (link[0] == CISTPL_LONGLINK_MFC) ||
 531             (link[0] == CISTPL_LINKTARGET) ||
 532             (link[0] == CISTPL_INDIRECT) ||
 533             (link[0] == CISTPL_NO_LINK)) {
 534             switch (link[0]) {
 535             case CISTPL_LONGLINK_A:
 536                 HAS_LINK(tuple->Flags) = 1;
 537                 LINK_SPACE(tuple->Flags) = attr | IS_ATTR;
 538                 read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset);
 539                 break;
 540             case CISTPL_LONGLINK_C:
 541                 HAS_LINK(tuple->Flags) = 1;
 542                 LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR;
 543                 read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset);
 544                 break;
 545             case CISTPL_INDIRECT:
 546                 HAS_LINK(tuple->Flags) = 1;
 547                 LINK_SPACE(tuple->Flags) = IS_ATTR | IS_INDIRECT;
 548                 tuple->LinkOffset = 0;
 549                 break;
 550             case CISTPL_LONGLINK_MFC:
 551                 tuple->LinkOffset = ofs + 3;
 552                 LINK_SPACE(tuple->Flags) = attr;
 553                 if (function == BIND_FN_ALL) {
 554                     /* Follow all the MFC links */
 555                     read_cis_cache(s, attr, ofs+2, 1, &tmp);
 556                     MFC_FN(tuple->Flags) = tmp;
 557                 } else {
 558                     /* Follow exactly one of the links */
 559                     MFC_FN(tuple->Flags) = 1;
 560                     tuple->LinkOffset += function * 5;
 561                 }
 562                 break;
 563             case CISTPL_NO_LINK:
 564                 HAS_LINK(tuple->Flags) = 0;
 565                 break;
 566             }
 567             if ((tuple->Attributes & TUPLE_RETURN_LINK) &&
 568                 (tuple->DesiredTuple == RETURN_FIRST_TUPLE))
 569                 break;
 570         } else
 571             if (tuple->DesiredTuple == RETURN_FIRST_TUPLE)
 572                 break;
 573
 574         if (link[0] == tuple->DesiredTuple)
 575             break;
 576         ofs += link[1] + 2;
 577     }
 578     if (i == MAX_TUPLES) {
 579         cs_dbg(s, 1, "cs: overrun in pcmcia_get_next_tuple\n");
 580         return CS_NO_MORE_ITEMS;
 581     }
 582
 583     tuple->TupleCode = link[0];
 584     tuple->TupleLink = link[1];
 585     tuple->CISOffset = ofs + 2;
 586     return CS_SUCCESS;
 587 }
 588 EXPORT_SYMBOL(pccard_get_next_tuple);
 589
 590 /*====================================================================*/
 591
 592 #define _MIN(a, b)              (((a) < (b)) ? (a) : (b))
 593
 594 int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple)
 595 {
 596     u_int len;
 597
 598     if (!s)
 599         return CS_BAD_HANDLE;
 600
 601     if (tuple->TupleLink < tuple->TupleOffset)
 602         return CS_NO_MORE_ITEMS;
 603     len = tuple->TupleLink - tuple->TupleOffset;
 604     tuple->TupleDataLen = tuple->TupleLink;
 605     if (len == 0)
 606         return CS_SUCCESS;
 607     read_cis_cache(s, SPACE(tuple->Flags),
 608                    tuple->CISOffset + tuple->TupleOffset,
 609                    _MIN(len, tuple->TupleDataMax), tuple->TupleData);
 610     return CS_SUCCESS;
 611 }
 612 EXPORT_SYMBOL(pccard_get_tuple_data);
 613
 614
 615 /*======================================================================
 616
 617     Parsing routines for individual tuples
 618
 619 ======================================================================*/
 620
 621 static int parse_device(tuple_t *tuple, cistpl_device_t *device)
 622 {
 623     int i;
 624     u_char scale;
 625     u_char *p, *q;
 626
 627     p = (u_char *)tuple->TupleData;
 628     q = p + tuple->TupleDataLen;
 629
 630     device->ndev = 0;
 631     for (i = 0; i < CISTPL_MAX_DEVICES; i++) {
 632
 633         if (*p == 0xff) break;
 634         device->dev[i].type = (*p >> 4);
 635         device->dev[i].wp = (*p & 0x08) ? 1 : 0;
 636         switch (*p & 0x07) {
 637         case 0: device->dev[i].speed = 0;   break;
 638         case 1: device->dev[i].speed = 250; break;
 639         case 2: device->dev[i].speed = 200; break;
 640         case 3: device->dev[i].speed = 150; break;
 641         case 4: device->dev[i].speed = 100; break;
 642         case 7:
 643             if (++p == q) return CS_BAD_TUPLE;
 644             device->dev[i].speed = SPEED_CVT(*p);
 645             while (*p & 0x80)
 646                 if (++p == q) return CS_BAD_TUPLE;
 647             break;
 648         default:
 649             return CS_BAD_TUPLE;
 650         }
 651
 652         if (++p == q) return CS_BAD_TUPLE;
 653         if (*p == 0xff) break;
 654         scale = *p & 7;
 655         if (scale == 7) return CS_BAD_TUPLE;
 656         device->dev[i].size = ((*p >> 3) + 1) * (512 << (scale*2));
 657         device->ndev++;
 658         if (++p == q) break;
 659     }
 660
 661     return CS_SUCCESS;
 662 }
 663
 664 /*====================================================================*/
 665
 666 static int parse_checksum(tuple_t *tuple, cistpl_checksum_t *csum)
 667 {
 668     u_char *p;
 669     if (tuple->TupleDataLen < 5)
 670         return CS_BAD_TUPLE;
 671     p = (u_char *)tuple->TupleData;
 672     csum->addr = tuple->CISOffset+(short)le16_to_cpu(*(__le16 *)p)-2;
 673     csum->len = le16_to_cpu(*(__le16 *)(p + 2));
 674     csum->sum = *(p+4);
 675     return CS_SUCCESS;
 676 }
 677
 678 /*====================================================================*/
 679
 680 static int parse_longlink(tuple_t *tuple, cistpl_longlink_t *link)
 681 {
 682     if (tuple->TupleDataLen < 4)
 683         return CS_BAD_TUPLE;
 684     link->addr = le32_to_cpu(*(__le32 *)tuple->TupleData);
 685     return CS_SUCCESS;
 686 }
 687
 688 /*====================================================================*/
 689
 690 static int parse_longlink_mfc(tuple_t *tuple,
 691                               cistpl_longlink_mfc_t *link)
 692 {
 693     u_char *p;
 694     int i;
 695
 696     p = (u_char *)tuple->TupleData;
 697
 698     link->nfn = *p; p++;
 699     if (tuple->TupleDataLen <= link->nfn*5)
 700         return CS_BAD_TUPLE;
 701     for (i = 0; i < link->nfn; i++) {
 702         link->fn[i].space = *p; p++;
 703         link->fn[i].addr = le32_to_cpu(*(__le32 *)p); p += 4;
 704     }
 705     return CS_SUCCESS;
 706 }
 707
 708 /*====================================================================*/
 709
 710 static int parse_strings(u_char *p, u_char *q, int max,
 711                          char *s, u_char *ofs, u_char *found)
 712 {
 713     int i, j, ns;
 714
 715     if (p == q) return CS_BAD_TUPLE;
 716     ns = 0; j = 0;
 717     for (i = 0; i < max; i++) {
 718         if (*p == 0xff) break;
 719         ofs[i] = j;
 720         ns++;
 721         for (;;) {
 722             s[j++] = (*p == 0xff) ? '\0' : *p;
 723             if ((*p == '\0') || (*p == 0xff)) break;
 724             if (++p == q) return CS_BAD_TUPLE;
 725         }
 726         if ((*p == 0xff) || (++p == q)) break;
 727     }
 728     if (found) {
 729         *found = ns;
 730         return CS_SUCCESS;
 731     } else {
 732         return (ns == max) ? CS_SUCCESS : CS_BAD_TUPLE;
 733     }
 734 }
 735
 736 /*====================================================================*/
 737
 738 static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1)
 739 {
 740     u_char *p, *q;
 741
 742     p = (u_char *)tuple->TupleData;
 743     q = p + tuple->TupleDataLen;
 744
 745     vers_1->major = *p; p++;
 746     vers_1->minor = *p; p++;
 747     if (p >= q) return CS_BAD_TUPLE;
 748
 749     return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS,
 750                          vers_1->str, vers_1->ofs, &vers_1->ns);
 751 }
 752
 753 /*====================================================================*/
 754
 755 static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr)
 756 {
 757     u_char *p, *q;
 758
 759     p = (u_char *)tuple->TupleData;
 760     q = p + tuple->TupleDataLen;
 761
 762     return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS,
 763                          altstr->str, altstr->ofs, &altstr->ns);
 764 }
 765
 766 /*====================================================================*/
 767
 768 static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec)
 769 {
 770     u_char *p, *q;
 771     int nid;
 772
 773     p = (u_char *)tuple->TupleData;
 774     q = p + tuple->TupleDataLen;
 775
 776     for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) {
 777         if (p > q-2) break;
 778         jedec->id[nid].mfr = p[0];
 779         jedec->id[nid].info = p[1];
 780         p += 2;
 781     }
 782     jedec->nid = nid;
 783     return CS_SUCCESS;
 784 }
 785
 786 /*====================================================================*/
 787
 788 static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m)
 789 {
 790     __le16 *p;
 791     if (tuple->TupleDataLen < 4)
 792         return CS_BAD_TUPLE;
 793     p = (__le16 *)tuple->TupleData;
 794     m->manf = le16_to_cpu(p[0]);
 795     m->card = le16_to_cpu(p[1]);
 796     return CS_SUCCESS;
 797 }
 798
 799 /*====================================================================*/
 800
 801 static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f)
 802 {
 803     u_char *p;
 804     if (tuple->TupleDataLen < 2)
 805         return CS_BAD_TUPLE;
 806     p = (u_char *)tuple->TupleData;
 807     f->func = p[0];
 808     f->sysinit = p[1];
 809     return CS_SUCCESS;
 810 }
 811
 812 /*====================================================================*/
 813
 814 static int parse_funce(tuple_t *tuple, cistpl_funce_t *f)
 815 {
 816     u_char *p;
 817     int i;
 818     if (tuple->TupleDataLen < 1)
 819         return CS_BAD_TUPLE;
 820     p = (u_char *)tuple->TupleData;
 821     f->type = p[0];
 822     for (i = 1; i < tuple->TupleDataLen; i++)
 823         f->data[i-1] = p[i];
 824     return CS_SUCCESS;
 825 }
 826
 827 /*====================================================================*/
 828
 829 static int parse_config(tuple_t *tuple, cistpl_config_t *config)
 830 {
 831     int rasz, rmsz, i;
 832     u_char *p;
 833
 834     p = (u_char *)tuple->TupleData;
 835     rasz = *p & 0x03;
 836     rmsz = (*p & 0x3c) >> 2;
 837     if (tuple->TupleDataLen < rasz+rmsz+4)
 838         return CS_BAD_TUPLE;
 839     config->last_idx = *(++p);
 840     p++;
 841     config->base = 0;
 842     for (i = 0; i <= rasz; i++)
 843         config->base += p[i] << (8*i);
 844     p += rasz+1;
 845     for (i = 0; i < 4; i++)
 846         config->rmask[i] = 0;
 847     for (i = 0; i <= rmsz; i++)
 848         config->rmask[i>>2] += p[i] << (8*(i%4));
 849     config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4);
 850     return CS_SUCCESS;
 851 }
 852
 853 /*======================================================================
 854
 855     The following routines are all used to parse the nightmarish
 856     config table entries.
 857
 858 ======================================================================*/
 859
 860 static u_char *parse_power(u_char *p, u_char *q,
 861                            cistpl_power_t *pwr)
 862 {
 863     int i;
 864     u_int scale;
 865
 866     if (p == q) return NULL;
 867     pwr->present = *p;
 868     pwr->flags = 0;
 869     p++;
 870     for (i = 0; i < 7; i++)
 871         if (pwr->present & (1<<i)) {
 872             if (p == q) return NULL;
 873             pwr->param[i] = POWER_CVT(*p);
 874             scale = POWER_SCALE(*p);
 875             while (*p & 0x80) {
 876                 if (++p == q) return NULL;
 877                 if ((*p & 0x7f) < 100)
 878                     pwr->param[i] += (*p & 0x7f) * scale / 100;
 879                 else if (*p == 0x7d)
 880                     pwr->flags |= CISTPL_POWER_HIGHZ_OK;
 881                 else if (*p == 0x7e)
 882                     pwr->param[i] = 0;
 883                 else if (*p == 0x7f)
 884                     pwr->flags |= CISTPL_POWER_HIGHZ_REQ;
 885                 else
 886                     return NULL;
 887             }
 888             p++;
 889         }
 890     return p;
 891 }
 892
 893 /*====================================================================*/
 894
 895 static u_char *parse_timing(u_char *p, u_char *q,
 896                             cistpl_timing_t *timing)
 897 {
 898     u_char scale;
 899
 900     if (p == q) return NULL;
 901     scale = *p;
 902     if ((scale & 3) != 3) {
 903         if (++p == q) return NULL;
 904         timing->wait = SPEED_CVT(*p);
 905         timing->waitscale = exponent[scale & 3];
 906     } else
 907         timing->wait = 0;
 908     scale >>= 2;
 909     if ((scale & 7) != 7) {
 910         if (++p == q) return NULL;
 911         timing->ready = SPEED_CVT(*p);
 912         timing->rdyscale = exponent[scale & 7];
 913     } else
 914         timing->ready = 0;
 915     scale >>= 3;
 916     if (scale != 7) {
 917         if (++p == q) return NULL;
 918         timing->reserved = SPEED_CVT(*p);
 919         timing->rsvscale = exponent[scale];
 920     } else
 921         timing->reserved = 0;
 922     p++;
 923     return p;
 924 }
 925
 926 /*====================================================================*/
 927
 928 static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io)
 929 {
 930     int i, j, bsz, lsz;
 931
 932     if (p == q) return NULL;
 933     io->flags = *p;
 934
 935     if (!(*p & 0x80)) {
 936         io->nwin = 1;
 937         io->win[0].base = 0;
 938         io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK));
 939         return p+1;
 940     }
 941
 942     if (++p == q) return NULL;
 943     io->nwin = (*p & 0x0f) + 1;
 944     bsz = (*p & 0x30) >> 4;
 945     if (bsz == 3) bsz++;
 946     lsz = (*p & 0xc0) >> 6;
 947     if (lsz == 3) lsz++;
 948     p++;
 949
 950     for (i = 0; i < io->nwin; i++) {
 951         io->win[i].base = 0;
 952         io->win[i].len = 1;
 953         for (j = 0; j < bsz; j++, p++) {
 954             if (p == q) return NULL;
 955             io->win[i].base += *p << (j*8);
 956         }
 957         for (j = 0; j < lsz; j++, p++) {
 958             if (p == q) return NULL;
 959             io->win[i].len += *p << (j*8);
 960         }
 961     }
 962     return p;
 963 }
 964
 965 /*====================================================================*/
 966
 967 static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem)
 968 {
 969     int i, j, asz, lsz, has_ha;
 970     u_int len, ca, ha;
 971
 972     if (p == q) return NULL;
 973
 974     mem->nwin = (*p & 0x07) + 1;
 975     lsz = (*p & 0x18) >> 3;
 976     asz = (*p & 0x60) >> 5;
 977     has_ha = (*p & 0x80);
 978     if (++p == q) return NULL;
 979
 980     for (i = 0; i < mem->nwin; i++) {
 981         len = ca = ha = 0;
 982         for (j = 0; j < lsz; j++, p++) {
 983             if (p == q) return NULL;
 984             len += *p << (j*8);
 985         }
 986         for (j = 0; j < asz; j++, p++) {
 987             if (p == q) return NULL;
 988             ca += *p << (j*8);
 989         }
 990         if (has_ha)
 991             for (j = 0; j < asz; j++, p++) {
 992                 if (p == q) return NULL;
 993                 ha += *p << (j*8);
 994             }
 995         mem->win[i].len = len << 8;
 996         mem->win[i].card_addr = ca << 8;
 997         mem->win[i].host_addr = ha << 8;
 998     }
 999     return p;
1000 }
1001
1002 /*====================================================================*/
1003
1004 static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq)
1005 {
1006     if (p == q) return NULL;
1007     irq->IRQInfo1 = *p; p++;
1008     if (irq->IRQInfo1 & IRQ_INFO2_VALID) {
1009         if (p+2 > q) return NULL;
1010         irq->IRQInfo2 = (p[1]<<8) + p[0];
1011         p += 2;
1012     }
1013     return p;
1014 }
1015
1016 /*====================================================================*/
1017
1018 static int parse_cftable_entry(tuple_t *tuple,
1019                                cistpl_cftable_entry_t *entry)
1020 {
1021     u_char *p, *q, features;
1022
1023     p = tuple->TupleData;
1024     q = p + tuple->TupleDataLen;
1025     entry->index = *p & 0x3f;
1026     entry->flags = 0;
1027     if (*p & 0x40)
1028         entry->flags |= CISTPL_CFTABLE_DEFAULT;
1029     if (*p & 0x80) {
1030         if (++p == q) return CS_BAD_TUPLE;
1031         if (*p & 0x10)
1032             entry->flags |= CISTPL_CFTABLE_BVDS;
1033         if (*p & 0x20)
1034             entry->flags |= CISTPL_CFTABLE_WP;
1035         if (*p & 0x40)
1036             entry->flags |= CISTPL_CFTABLE_RDYBSY;
1037         if (*p & 0x80)
1038             entry->flags |= CISTPL_CFTABLE_MWAIT;
1039         entry->interface = *p & 0x0f;
1040     } else
1041         entry->interface = 0;
1042
1043     /* Process optional features */
1044     if (++p == q) return CS_BAD_TUPLE;
1045     features = *p; p++;
1046
1047     /* Power options */
1048     if ((features & 3) > 0) {
1049         p = parse_power(p, q, &entry->vcc);
1050         if (p == NULL) return CS_BAD_TUPLE;
1051     } else
1052         entry->vcc.present = 0;
1053     if ((features & 3) > 1) {
1054         p = parse_power(p, q, &entry->vpp1);
1055         if (p == NULL) return CS_BAD_TUPLE;
1056     } else
1057         entry->vpp1.present = 0;
1058     if ((features & 3) > 2) {
1059         p = parse_power(p, q, &entry->vpp2);
1060         if (p == NULL) return CS_BAD_TUPLE;
1061     } else
1062         entry->vpp2.present = 0;
1063
1064     /* Timing options */
1065     if (features & 0x04) {
1066         p = parse_timing(p, q, &entry->timing);
1067         if (p == NULL) return CS_BAD_TUPLE;
1068     } else {
1069         entry->timing.wait = 0;
1070         entry->timing.ready = 0;
1071         entry->timing.reserved = 0;
1072     }
1073
1074     /* I/O window options */
1075     if (features & 0x08) {
1076         p = parse_io(p, q, &entry->io);
1077         if (p == NULL) return CS_BAD_TUPLE;
1078     } else
1079         entry->io.nwin = 0;
1080
1081     /* Interrupt options */
1082     if (features & 0x10) {
1083         p = parse_irq(p, q, &entry->irq);
1084         if (p == NULL) return CS_BAD_TUPLE;
1085     } else
1086         entry->irq.IRQInfo1 = 0;
1087
1088     switch (features & 0x60) {
1089     case 0x00:
1090         entry->mem.nwin = 0;
1091         break;
1092     case 0x20:
1093         entry->mem.nwin = 1;
1094         entry->mem.win[0].len = le16_to_cpu(*(__le16 *)p) << 8;
1095         entry->mem.win[0].card_addr = 0;
1096         entry->mem.win[0].host_addr = 0;
1097         p += 2;
1098         if (p > q) return CS_BAD_TUPLE;
1099         break;
1100     case 0x40:
1101         entry->mem.nwin = 1;
1102         entry->mem.win[0].len = le16_to_cpu(*(__le16 *)p) << 8;
1103         entry->mem.win[0].card_addr =
1104             le16_to_cpu(*(__le16 *)(p+2)) << 8;
1105         entry->mem.win[0].host_addr = 0;
1106         p += 4;
1107         if (p > q) return CS_BAD_TUPLE;
1108         break;
1109     case 0x60:
1110         p = parse_mem(p, q, &entry->mem);
1111         if (p == NULL) return CS_BAD_TUPLE;
1112         break;
1113     }
1114
1115     /* Misc features */
1116     if (features & 0x80) {
1117         if (p == q) return CS_BAD_TUPLE;
1118         entry->flags |= (*p << 8);
1119         while (*p & 0x80)
1120             if (++p == q) return CS_BAD_TUPLE;
1121         p++;
1122     }
1123
1124     entry->subtuples = q-p;
1125
1126     return CS_SUCCESS;
1127 }
1128
1129 /*====================================================================*/
1130
1131 #ifdef CONFIG_CARDBUS
1132
1133 static int parse_bar(tuple_t *tuple, cistpl_bar_t *bar)
1134 {
1135     u_char *p;
1136     if (tuple->TupleDataLen < 6)
1137         return CS_BAD_TUPLE;
1138     p = (u_char *)tuple->TupleData;
1139     bar->attr = *p;
1140     p += 2;
1141     bar->size = le32_to_cpu(*(__le32 *)p);
1142     return CS_SUCCESS;
1143 }
1144
1145 static int parse_config_cb(tuple_t *tuple, cistpl_config_t *config)
1146 {
1147     u_char *p;
1148
1149     p = (u_char *)tuple->TupleData;
1150     if ((*p != 3) || (tuple->TupleDataLen < 6))
1151         return CS_BAD_TUPLE;
1152     config->last_idx = *(++p);
1153     p++;
1154     config->base = le32_to_cpu(*(__le32 *)p);
1155     config->subtuples = tuple->TupleDataLen - 6;
1156     return CS_SUCCESS;
1157 }
1158
1159 static int parse_cftable_entry_cb(tuple_t *tuple,
1160                                   cistpl_cftable_entry_cb_t *entry)
1161 {
1162     u_char *p, *q, features;
1163
1164     p = tuple->TupleData;
1165     q = p + tuple->TupleDataLen;
1166     entry->index = *p & 0x3f;
1167     entry->flags = 0;
1168     if (*p & 0x40)
1169         entry->flags |= CISTPL_CFTABLE_DEFAULT;
1170
1171     /* Process optional features */
1172     if (++p == q) return CS_BAD_TUPLE;
1173     features = *p; p++;
1174
1175     /* Power options */
1176     if ((features & 3) > 0) {
1177         p = parse_power(p, q, &entry->vcc);
1178         if (p == NULL) return CS_BAD_TUPLE;
1179     } else
1180         entry->vcc.present = 0;
1181     if ((features & 3) > 1) {
1182         p = parse_power(p, q, &entry->vpp1);
1183         if (p == NULL) return CS_BAD_TUPLE;
1184     } else
1185         entry->vpp1.present = 0;
1186     if ((features & 3) > 2) {
1187         p = parse_power(p, q, &entry->vpp2);
1188         if (p == NULL) return CS_BAD_TUPLE;
1189     } else
1190         entry->vpp2.present = 0;
1191
1192     /* I/O window options */
1193     if (features & 0x08) {
1194         if (p == q) return CS_BAD_TUPLE;
1195         entry->io = *p; p++;
1196     } else
1197         entry->io = 0;
1198
1199     /* Interrupt options */
1200     if (features & 0x10) {
1201         p = parse_irq(p, q, &entry->irq);
1202         if (p == NULL) return CS_BAD_TUPLE;
1203     } else
1204         entry->irq.IRQInfo1 = 0;
1205
1206     if (features & 0x20) {
1207         if (p == q) return CS_BAD_TUPLE;
1208         entry->mem = *p; p++;
1209     } else
1210         entry->mem = 0;
1211
1212     /* Misc features */
1213     if (features & 0x80) {
1214         if (p == q) return CS_BAD_TUPLE;
1215         entry->flags |= (*p << 8);
1216         if (*p & 0x80) {
1217             if (++p == q) return CS_BAD_TUPLE;
1218             entry->flags |= (*p << 16);
1219         }
1220         while (*p & 0x80)
1221             if (++p == q) return CS_BAD_TUPLE;
1222         p++;
1223     }
1224
1225     entry->subtuples = q-p;
1226
1227     return CS_SUCCESS;
1228 }
1229
1230 #endif
1231
1232 /*====================================================================*/
1233
1234 static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
1235 {
1236     u_char *p, *q;
1237     int n;
1238
1239     p = (u_char *)tuple->TupleData;
1240     q = p + tuple->TupleDataLen;
1241
1242     for (n = 0; n < CISTPL_MAX_DEVICES; n++) {
1243         if (p > q-6) break;
1244         geo->geo[n].buswidth = p[0];
1245         geo->geo[n].erase_block = 1 << (p[1]-1);
1246         geo->geo[n].read_block  = 1 << (p[2]-1);
1247         geo->geo[n].write_block = 1 << (p[3]-1);
1248         geo->geo[n].partition   = 1 << (p[4]-1);
1249         geo->geo[n].interleave  = 1 << (p[5]-1);
1250         p += 6;
1251     }
1252     geo->ngeo = n;
1253     return CS_SUCCESS;
1254 }
1255
1256 /*====================================================================*/
1257
1258 static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2)
1259 {
1260     u_char *p, *q;
1261
1262     if (tuple->TupleDataLen < 10)
1263         return CS_BAD_TUPLE;
1264
1265     p = tuple->TupleData;
1266     q = p + tuple->TupleDataLen;
1267
1268     v2->vers = p[0];
1269     v2->comply = p[1];
1270     v2->dindex = le16_to_cpu(*(__le16 *)(p+2));
1271     v2->vspec8 = p[6];
1272     v2->vspec9 = p[7];
1273     v2->nhdr = p[8];
1274     p += 9;
1275     return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL);
1276 }
1277
1278 /*====================================================================*/
1279
1280 static int parse_org(tuple_t *tuple, cistpl_org_t *org)
1281 {
1282     u_char *p, *q;
1283     int i;
1284
1285     p = tuple->TupleData;
1286     q = p + tuple->TupleDataLen;
1287     if (p == q) return CS_BAD_TUPLE;
1288     org->data_org = *p;
1289     if (++p == q) return CS_BAD_TUPLE;
1290     for (i = 0; i < 30; i++) {
1291         org->desc[i] = *p;
1292         if (*p == '\0') break;
1293         if (++p == q) return CS_BAD_TUPLE;
1294     }
1295     return CS_SUCCESS;
1296 }
1297
1298 /*====================================================================*/
1299
1300 static int parse_format(tuple_t *tuple, cistpl_format_t *fmt)
1301 {
1302     u_char *p;
1303
1304     if (tuple->TupleDataLen < 10)
1305         return CS_BAD_TUPLE;
1306
1307     p = tuple->TupleData;
1308
1309     fmt->type = p[0];
1310     fmt->edc = p[1];
1311     fmt->offset = le32_to_cpu(*(__le32 *)(p+2));
1312     fmt->length = le32_to_cpu(*(__le32 *)(p+6));
1313
1314     return CS_SUCCESS;
1315 }
1316
1317 /*====================================================================*/
1318
1319 int pccard_parse_tuple(tuple_t *tuple, cisparse_t *parse)
1320 {
1321     int ret = CS_SUCCESS;
1322
1323     if (tuple->TupleDataLen > tuple->TupleDataMax)
1324         return CS_BAD_TUPLE;
1325     switch (tuple->TupleCode) {
1326     case CISTPL_DEVICE:
1327     case CISTPL_DEVICE_A:
1328         ret = parse_device(tuple, &parse->device);
1329         break;
1330 #ifdef CONFIG_CARDBUS
1331     case CISTPL_BAR:
1332         ret = parse_bar(tuple, &parse->bar);
1333         break;
1334     case CISTPL_CONFIG_CB:
1335         ret = parse_config_cb(tuple, &parse->config);
1336         break;
1337     case CISTPL_CFTABLE_ENTRY_CB:
1338         ret = parse_cftable_entry_cb(tuple, &parse->cftable_entry_cb);
1339         break;
1340 #endif
1341     case CISTPL_CHECKSUM:
1342         ret = parse_checksum(tuple, &parse->checksum);
1343         break;
1344     case CISTPL_LONGLINK_A:
1345     case CISTPL_LONGLINK_C:
1346         ret = parse_longlink(tuple, &parse->longlink);
1347         break;
1348     case CISTPL_LONGLINK_MFC:
1349         ret = parse_longlink_mfc(tuple, &parse->longlink_mfc);
1350         break;
1351     case CISTPL_VERS_1:
1352         ret = parse_vers_1(tuple, &parse->version_1);
1353         break;
1354     case CISTPL_ALTSTR:
1355         ret = parse_altstr(tuple, &parse->altstr);
1356         break;
1357     case CISTPL_JEDEC_A:
1358     case CISTPL_JEDEC_C:
1359         ret = parse_jedec(tuple, &parse->jedec);
1360         break;
1361     case CISTPL_MANFID:
1362         ret = parse_manfid(tuple, &parse->manfid);
1363         break;
1364     case CISTPL_FUNCID:
1365         ret = parse_funcid(tuple, &parse->funcid);
1366         break;
1367     case CISTPL_FUNCE:
1368         ret = parse_funce(tuple, &parse->funce);
1369         break;
1370     case CISTPL_CONFIG:
1371         ret = parse_config(tuple, &parse->config);
1372         break;
1373     case CISTPL_CFTABLE_ENTRY:
1374         ret = parse_cftable_entry(tuple, &parse->cftable_entry);
1375         break;
1376     case CISTPL_DEVICE_GEO:
1377     case CISTPL_DEVICE_GEO_A:
1378         ret = parse_device_geo(tuple, &parse->device_geo);
1379         break;
1380     case CISTPL_VERS_2:
1381         ret = parse_vers_2(tuple, &parse->vers_2);
1382         break;
1383     case CISTPL_ORG:
1384         ret = parse_org(tuple, &parse->org);
1385         break;
1386     case CISTPL_FORMAT:
1387     case CISTPL_FORMAT_A:
1388         ret = parse_format(tuple, &parse->format);
1389         break;
1390     case CISTPL_NO_LINK:
1391     case CISTPL_LINKTARGET:
1392         ret = CS_SUCCESS;
1393         break;
1394     default:
1395         ret = CS_UNSUPPORTED_FUNCTION;
1396         break;
1397     }
1398     return ret;
1399 }
1400 EXPORT_SYMBOL(pccard_parse_tuple);
1401
1402 /*======================================================================
1403
1404     This is used internally by Card Services to look up CIS stuff.
1405
1406 ======================================================================*/
1407
1408 int pccard_read_tuple(struct pcmcia_socket *s, unsigned int function, cisdata_t code, void *parse)
1409 {
1410     tuple_t tuple;
1411     cisdata_t *buf;
1412     int ret;
1413
1414     buf = kmalloc(256, GFP_KERNEL);
1415     if (buf == NULL)
1416         return CS_OUT_OF_RESOURCE;
1417     tuple.DesiredTuple = code;
1418     tuple.Attributes = TUPLE_RETURN_COMMON;
1419     ret = pccard_get_first_tuple(s, function, &tuple);
1420     if (ret != CS_SUCCESS) goto done;
1421     tuple.TupleData = buf;
1422     tuple.TupleOffset = 0;
1423     tuple.TupleDataMax = 255;
1424     ret = pccard_get_tuple_data(s, &tuple);
1425     if (ret != CS_SUCCESS) goto done;
1426     ret = pccard_parse_tuple(&tuple, parse);
1427 done:
1428     kfree(buf);
1429     return ret;
1430 }
1431 EXPORT_SYMBOL(pccard_read_tuple);
1432
1433 /*======================================================================
1434
1435     This tries to determine if a card has a sensible CIS.  It returns
1436     the number of tuples in the CIS, or 0 if the CIS looks bad.  The
1437     checks include making sure several critical tuples are present and
1438     valid; seeing if the total number of tuples is reasonable; and
1439     looking for tuples that use reserved codes.
1440
1441 ======================================================================*/
1442
1443 int pccard_validate_cis(struct pcmcia_socket *s, unsigned int function, cisinfo_t *info)
1444 {
1445     tuple_t *tuple;
1446     cisparse_t *p;
1447     int ret, reserved, dev_ok = 0, ident_ok = 0;
1448
1449     if (!s)
1450         return CS_BAD_HANDLE;
1451
1452     tuple = kmalloc(sizeof(*tuple), GFP_KERNEL);
1453     if (tuple == NULL)
1454         return CS_OUT_OF_RESOURCE;
1455     p = kmalloc(sizeof(*p), GFP_KERNEL);
1456     if (p == NULL) {
1457         kfree(tuple);
1458         return CS_OUT_OF_RESOURCE;
1459     }
1460
1461     info->Chains = reserved = 0;
1462     tuple->DesiredTuple = RETURN_FIRST_TUPLE;
1463     tuple->Attributes = TUPLE_RETURN_COMMON;
1464     ret = pccard_get_first_tuple(s, function, tuple);
1465     if (ret != CS_SUCCESS)
1466         goto done;
1467
1468     /* First tuple should be DEVICE; we should really have either that
1469        or a CFTABLE_ENTRY of some sort */
1470     if ((tuple->TupleCode == CISTPL_DEVICE) ||
1471         (pccard_read_tuple(s, function, CISTPL_CFTABLE_ENTRY, p) == CS_SUCCESS) ||
1472         (pccard_read_tuple(s, function, CISTPL_CFTABLE_ENTRY_CB, p) == CS_SUCCESS))
1473         dev_ok++;
1474
1475     /* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
1476        tuple, for card identification.  Certain old D-Link and Linksys
1477        cards have only a broken VERS_2 tuple; hence the bogus test. */
1478     if ((pccard_read_tuple(s, function, CISTPL_MANFID, p) == CS_SUCCESS) ||
1479         (pccard_read_tuple(s, function, CISTPL_VERS_1, p) == CS_SUCCESS) ||
1480         (pccard_read_tuple(s, function, CISTPL_VERS_2, p) != CS_NO_MORE_ITEMS))
1481         ident_ok++;
1482
1483     if (!dev_ok && !ident_ok)
1484         goto done;
1485
1486     for (info->Chains = 1; info->Chains < MAX_TUPLES; info->Chains++) {
1487         ret = pccard_get_next_tuple(s, function, tuple);
1488         if (ret != CS_SUCCESS) break;
1489         if (((tuple->TupleCode > 0x23) && (tuple->TupleCode < 0x40)) ||
1490             ((tuple->TupleCode > 0x47) && (tuple->TupleCode < 0x80)) ||
1491             ((tuple->TupleCode > 0x90) && (tuple->TupleCode < 0xff)))
1492             reserved++;
1493     }
1494     if ((info->Chains == MAX_TUPLES) || (reserved > 5) ||
1495         ((!dev_ok || !ident_ok) && (info->Chains > 10)))
1496         info->Chains = 0;
1497
1498 done:
1499     kfree(tuple);
1500     kfree(p);
1501     return CS_SUCCESS;
1502 }
1503 EXPORT_SYMBOL(pccard_validate_cis);