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 #include <asm/unaligned.h>
  29
  30 #include <pcmcia/cs_types.h>
  31 #include <pcmcia/ss.h>
  32 #include <pcmcia/cs.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 = get_unaligned_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 + get_unaligned_le16(p) - 2;
 673     csum->len = get_unaligned_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 = get_unaligned_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 = get_unaligned_le32(p);
 704         p += 4;
 705     }
 706     return CS_SUCCESS;
 707 }
 708
 709 /*====================================================================*/
 710
 711 static int parse_strings(u_char *p, u_char *q, int max,
 712                          char *s, u_char *ofs, u_char *found)
 713 {
 714     int i, j, ns;
 715
 716     if (p == q) return CS_BAD_TUPLE;
 717     ns = 0; j = 0;
 718     for (i = 0; i < max; i++) {
 719         if (*p == 0xff) break;
 720         ofs[i] = j;
 721         ns++;
 722         for (;;) {
 723             s[j++] = (*p == 0xff) ? '\0' : *p;
 724             if ((*p == '\0') || (*p == 0xff)) break;
 725             if (++p == q) return CS_BAD_TUPLE;
 726         }
 727         if ((*p == 0xff) || (++p == q)) break;
 728     }
 729     if (found) {
 730         *found = ns;
 731         return CS_SUCCESS;
 732     } else {
 733         return (ns == max) ? CS_SUCCESS : CS_BAD_TUPLE;
 734     }
 735 }
 736
 737 /*====================================================================*/
 738
 739 static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1)
 740 {
 741     u_char *p, *q;
 742
 743     p = (u_char *)tuple->TupleData;
 744     q = p + tuple->TupleDataLen;
 745
 746     vers_1->major = *p; p++;
 747     vers_1->minor = *p; p++;
 748     if (p >= q) return CS_BAD_TUPLE;
 749
 750     return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS,
 751                          vers_1->str, vers_1->ofs, &vers_1->ns);
 752 }
 753
 754 /*====================================================================*/
 755
 756 static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr)
 757 {
 758     u_char *p, *q;
 759
 760     p = (u_char *)tuple->TupleData;
 761     q = p + tuple->TupleDataLen;
 762
 763     return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS,
 764                          altstr->str, altstr->ofs, &altstr->ns);
 765 }
 766
 767 /*====================================================================*/
 768
 769 static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec)
 770 {
 771     u_char *p, *q;
 772     int nid;
 773
 774     p = (u_char *)tuple->TupleData;
 775     q = p + tuple->TupleDataLen;
 776
 777     for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) {
 778         if (p > q-2) break;
 779         jedec->id[nid].mfr = p[0];
 780         jedec->id[nid].info = p[1];
 781         p += 2;
 782     }
 783     jedec->nid = nid;
 784     return CS_SUCCESS;
 785 }
 786
 787 /*====================================================================*/
 788
 789 static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m)
 790 {
 791     if (tuple->TupleDataLen < 4)
 792         return CS_BAD_TUPLE;
 793     m->manf = get_unaligned_le16(tuple->TupleData);
 794     m->card = get_unaligned_le16(tuple->TupleData + 2);
 795     return CS_SUCCESS;
 796 }
 797
 798 /*====================================================================*/
 799
 800 static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f)
 801 {
 802     u_char *p;
 803     if (tuple->TupleDataLen < 2)
 804         return CS_BAD_TUPLE;
 805     p = (u_char *)tuple->TupleData;
 806     f->func = p[0];
 807     f->sysinit = p[1];
 808     return CS_SUCCESS;
 809 }
 810
 811 /*====================================================================*/
 812
 813 static int parse_funce(tuple_t *tuple, cistpl_funce_t *f)
 814 {
 815     u_char *p;
 816     int i;
 817     if (tuple->TupleDataLen < 1)
 818         return CS_BAD_TUPLE;
 819     p = (u_char *)tuple->TupleData;
 820     f->type = p[0];
 821     for (i = 1; i < tuple->TupleDataLen; i++)
 822         f->data[i-1] = p[i];
 823     return CS_SUCCESS;
 824 }
 825
 826 /*====================================================================*/
 827
 828 static int parse_config(tuple_t *tuple, cistpl_config_t *config)
 829 {
 830     int rasz, rmsz, i;
 831     u_char *p;
 832
 833     p = (u_char *)tuple->TupleData;
 834     rasz = *p & 0x03;
 835     rmsz = (*p & 0x3c) >> 2;
 836     if (tuple->TupleDataLen < rasz+rmsz+4)
 837         return CS_BAD_TUPLE;
 838     config->last_idx = *(++p);
 839     p++;
 840     config->base = 0;
 841     for (i = 0; i <= rasz; i++)
 842         config->base += p[i] << (8*i);
 843     p += rasz+1;
 844     for (i = 0; i < 4; i++)
 845         config->rmask[i] = 0;
 846     for (i = 0; i <= rmsz; i++)
 847         config->rmask[i>>2] += p[i] << (8*(i%4));
 848     config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4);
 849     return CS_SUCCESS;
 850 }
 851
 852 /*======================================================================
 853
 854     The following routines are all used to parse the nightmarish
 855     config table entries.
 856
 857 ======================================================================*/
 858
 859 static u_char *parse_power(u_char *p, u_char *q,
 860                            cistpl_power_t *pwr)
 861 {
 862     int i;
 863     u_int scale;
 864
 865     if (p == q) return NULL;
 866     pwr->present = *p;
 867     pwr->flags = 0;
 868     p++;
 869     for (i = 0; i < 7; i++)
 870         if (pwr->present & (1<<i)) {
 871             if (p == q) return NULL;
 872             pwr->param[i] = POWER_CVT(*p);
 873             scale = POWER_SCALE(*p);
 874             while (*p & 0x80) {
 875                 if (++p == q) return NULL;
 876                 if ((*p & 0x7f) < 100)
 877                     pwr->param[i] += (*p & 0x7f) * scale / 100;
 878                 else if (*p == 0x7d)
 879                     pwr->flags |= CISTPL_POWER_HIGHZ_OK;
 880                 else if (*p == 0x7e)
 881                     pwr->param[i] = 0;
 882                 else if (*p == 0x7f)
 883                     pwr->flags |= CISTPL_POWER_HIGHZ_REQ;
 884                 else
 885                     return NULL;
 886             }
 887             p++;
 888         }
 889     return p;
 890 }
 891
 892 /*====================================================================*/
 893
 894 static u_char *parse_timing(u_char *p, u_char *q,
 895                             cistpl_timing_t *timing)
 896 {
 897     u_char scale;
 898
 899     if (p == q) return NULL;
 900     scale = *p;
 901     if ((scale & 3) != 3) {
 902         if (++p == q) return NULL;
 903         timing->wait = SPEED_CVT(*p);
 904         timing->waitscale = exponent[scale & 3];
 905     } else
 906         timing->wait = 0;
 907     scale >>= 2;
 908     if ((scale & 7) != 7) {
 909         if (++p == q) return NULL;
 910         timing->ready = SPEED_CVT(*p);
 911         timing->rdyscale = exponent[scale & 7];
 912     } else
 913         timing->ready = 0;
 914     scale >>= 3;
 915     if (scale != 7) {
 916         if (++p == q) return NULL;
 917         timing->reserved = SPEED_CVT(*p);
 918         timing->rsvscale = exponent[scale];
 919     } else
 920         timing->reserved = 0;
 921     p++;
 922     return p;
 923 }
 924
 925 /*====================================================================*/
 926
 927 static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io)
 928 {
 929     int i, j, bsz, lsz;
 930
 931     if (p == q) return NULL;
 932     io->flags = *p;
 933
 934     if (!(*p & 0x80)) {
 935         io->nwin = 1;
 936         io->win[0].base = 0;
 937         io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK));
 938         return p+1;
 939     }
 940
 941     if (++p == q) return NULL;
 942     io->nwin = (*p & 0x0f) + 1;
 943     bsz = (*p & 0x30) >> 4;
 944     if (bsz == 3) bsz++;
 945     lsz = (*p & 0xc0) >> 6;
 946     if (lsz == 3) lsz++;
 947     p++;
 948
 949     for (i = 0; i < io->nwin; i++) {
 950         io->win[i].base = 0;
 951         io->win[i].len = 1;
 952         for (j = 0; j < bsz; j++, p++) {
 953             if (p == q) return NULL;
 954             io->win[i].base += *p << (j*8);
 955         }
 956         for (j = 0; j < lsz; j++, p++) {
 957             if (p == q) return NULL;
 958             io->win[i].len += *p << (j*8);
 959         }
 960     }
 961     return p;
 962 }
 963
 964 /*====================================================================*/
 965
 966 static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem)
 967 {
 968     int i, j, asz, lsz, has_ha;
 969     u_int len, ca, ha;
 970
 971     if (p == q) return NULL;
 972
 973     mem->nwin = (*p & 0x07) + 1;
 974     lsz = (*p & 0x18) >> 3;
 975     asz = (*p & 0x60) >> 5;
 976     has_ha = (*p & 0x80);
 977     if (++p == q) return NULL;
 978
 979     for (i = 0; i < mem->nwin; i++) {
 980         len = ca = ha = 0;
 981         for (j = 0; j < lsz; j++, p++) {
 982             if (p == q) return NULL;
 983             len += *p << (j*8);
 984         }
 985         for (j = 0; j < asz; j++, p++) {
 986             if (p == q) return NULL;
 987             ca += *p << (j*8);
 988         }
 989         if (has_ha)
 990             for (j = 0; j < asz; j++, p++) {
 991                 if (p == q) return NULL;
 992                 ha += *p << (j*8);
 993             }
 994         mem->win[i].len = len << 8;
 995         mem->win[i].card_addr = ca << 8;
 996         mem->win[i].host_addr = ha << 8;
 997     }
 998     return p;
 999 }
1000
1001 /*====================================================================*/
1002
1003 static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq)
1004 {
1005     if (p == q) return NULL;
1006     irq->IRQInfo1 = *p; p++;
1007     if (irq->IRQInfo1 & IRQ_INFO2_VALID) {
1008         if (p+2 > q) return NULL;
1009         irq->IRQInfo2 = (p[1]<<8) + p[0];
1010         p += 2;
1011     }
1012     return p;
1013 }
1014
1015 /*====================================================================*/
1016
1017 static int parse_cftable_entry(tuple_t *tuple,
1018                                cistpl_cftable_entry_t *entry)
1019 {
1020     u_char *p, *q, features;
1021
1022     p = tuple->TupleData;
1023     q = p + tuple->TupleDataLen;
1024     entry->index = *p & 0x3f;
1025     entry->flags = 0;
1026     if (*p & 0x40)
1027         entry->flags |= CISTPL_CFTABLE_DEFAULT;
1028     if (*p & 0x80) {
1029         if (++p == q) return CS_BAD_TUPLE;
1030         if (*p & 0x10)
1031             entry->flags |= CISTPL_CFTABLE_BVDS;
1032         if (*p & 0x20)
1033             entry->flags |= CISTPL_CFTABLE_WP;
1034         if (*p & 0x40)
1035             entry->flags |= CISTPL_CFTABLE_RDYBSY;
1036         if (*p & 0x80)
1037             entry->flags |= CISTPL_CFTABLE_MWAIT;
1038         entry->interface = *p & 0x0f;
1039     } else
1040         entry->interface = 0;
1041
1042     /* Process optional features */
1043     if (++p == q) return CS_BAD_TUPLE;
1044     features = *p; p++;
1045
1046     /* Power options */
1047     if ((features & 3) > 0) {
1048         p = parse_power(p, q, &entry->vcc);
1049         if (p == NULL) return CS_BAD_TUPLE;
1050     } else
1051         entry->vcc.present = 0;
1052     if ((features & 3) > 1) {
1053         p = parse_power(p, q, &entry->vpp1);
1054         if (p == NULL) return CS_BAD_TUPLE;
1055     } else
1056         entry->vpp1.present = 0;
1057     if ((features & 3) > 2) {
1058         p = parse_power(p, q, &entry->vpp2);
1059         if (p == NULL) return CS_BAD_TUPLE;
1060     } else
1061         entry->vpp2.present = 0;
1062
1063     /* Timing options */
1064     if (features & 0x04) {
1065         p = parse_timing(p, q, &entry->timing);
1066         if (p == NULL) return CS_BAD_TUPLE;
1067     } else {
1068         entry->timing.wait = 0;
1069         entry->timing.ready = 0;
1070         entry->timing.reserved = 0;
1071     }
1072
1073     /* I/O window options */
1074     if (features & 0x08) {
1075         p = parse_io(p, q, &entry->io);
1076         if (p == NULL) return CS_BAD_TUPLE;
1077     } else
1078         entry->io.nwin = 0;
1079
1080     /* Interrupt options */
1081     if (features & 0x10) {
1082         p = parse_irq(p, q, &entry->irq);
1083         if (p == NULL) return CS_BAD_TUPLE;
1084     } else
1085         entry->irq.IRQInfo1 = 0;
1086
1087     switch (features & 0x60) {
1088     case 0x00:
1089         entry->mem.nwin = 0;
1090         break;
1091     case 0x20:
1092         entry->mem.nwin = 1;
1093         entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1094         entry->mem.win[0].card_addr = 0;
1095         entry->mem.win[0].host_addr = 0;
1096         p += 2;
1097         if (p > q) return CS_BAD_TUPLE;
1098         break;
1099     case 0x40:
1100         entry->mem.nwin = 1;
1101         entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1102         entry->mem.win[0].card_addr = get_unaligned_le16(p + 2) << 8;
1103         entry->mem.win[0].host_addr = 0;
1104         p += 4;
1105         if (p > q) return CS_BAD_TUPLE;
1106         break;
1107     case 0x60:
1108         p = parse_mem(p, q, &entry->mem);
1109         if (p == NULL) return CS_BAD_TUPLE;
1110         break;
1111     }
1112
1113     /* Misc features */
1114     if (features & 0x80) {
1115         if (p == q) return CS_BAD_TUPLE;
1116         entry->flags |= (*p << 8);
1117         while (*p & 0x80)
1118             if (++p == q) return CS_BAD_TUPLE;
1119         p++;
1120     }
1121
1122     entry->subtuples = q-p;
1123
1124     return CS_SUCCESS;
1125 }
1126
1127 /*====================================================================*/
1128
1129 #ifdef CONFIG_CARDBUS
1130
1131 static int parse_bar(tuple_t *tuple, cistpl_bar_t *bar)
1132 {
1133     u_char *p;
1134     if (tuple->TupleDataLen < 6)
1135         return CS_BAD_TUPLE;
1136     p = (u_char *)tuple->TupleData;
1137     bar->attr = *p;
1138     p += 2;
1139     bar->size = get_unaligned_le32(p);
1140     return CS_SUCCESS;
1141 }
1142
1143 static int parse_config_cb(tuple_t *tuple, cistpl_config_t *config)
1144 {
1145     u_char *p;
1146
1147     p = (u_char *)tuple->TupleData;
1148     if ((*p != 3) || (tuple->TupleDataLen < 6))
1149         return CS_BAD_TUPLE;
1150     config->last_idx = *(++p);
1151     p++;
1152     config->base = get_unaligned_le32(p);
1153     config->subtuples = tuple->TupleDataLen - 6;
1154     return CS_SUCCESS;
1155 }
1156
1157 static int parse_cftable_entry_cb(tuple_t *tuple,
1158                                   cistpl_cftable_entry_cb_t *entry)
1159 {
1160     u_char *p, *q, features;
1161
1162     p = tuple->TupleData;
1163     q = p + tuple->TupleDataLen;
1164     entry->index = *p & 0x3f;
1165     entry->flags = 0;
1166     if (*p & 0x40)
1167         entry->flags |= CISTPL_CFTABLE_DEFAULT;
1168
1169     /* Process optional features */
1170     if (++p == q) return CS_BAD_TUPLE;
1171     features = *p; p++;
1172
1173     /* Power options */
1174     if ((features & 3) > 0) {
1175         p = parse_power(p, q, &entry->vcc);
1176         if (p == NULL) return CS_BAD_TUPLE;
1177     } else
1178         entry->vcc.present = 0;
1179     if ((features & 3) > 1) {
1180         p = parse_power(p, q, &entry->vpp1);
1181         if (p == NULL) return CS_BAD_TUPLE;
1182     } else
1183         entry->vpp1.present = 0;
1184     if ((features & 3) > 2) {
1185         p = parse_power(p, q, &entry->vpp2);
1186         if (p == NULL) return CS_BAD_TUPLE;
1187     } else
1188         entry->vpp2.present = 0;
1189
1190     /* I/O window options */
1191     if (features & 0x08) {
1192         if (p == q) return CS_BAD_TUPLE;
1193         entry->io = *p; p++;
1194     } else
1195         entry->io = 0;
1196
1197     /* Interrupt options */
1198     if (features & 0x10) {
1199         p = parse_irq(p, q, &entry->irq);
1200         if (p == NULL) return CS_BAD_TUPLE;
1201     } else
1202         entry->irq.IRQInfo1 = 0;
1203
1204     if (features & 0x20) {
1205         if (p == q) return CS_BAD_TUPLE;
1206         entry->mem = *p; p++;
1207     } else
1208         entry->mem = 0;
1209
1210     /* Misc features */
1211     if (features & 0x80) {
1212         if (p == q) return CS_BAD_TUPLE;
1213         entry->flags |= (*p << 8);
1214         if (*p & 0x80) {
1215             if (++p == q) return CS_BAD_TUPLE;
1216             entry->flags |= (*p << 16);
1217         }
1218         while (*p & 0x80)
1219             if (++p == q) return CS_BAD_TUPLE;
1220         p++;
1221     }
1222
1223     entry->subtuples = q-p;
1224
1225     return CS_SUCCESS;
1226 }
1227
1228 #endif
1229
1230 /*====================================================================*/
1231
1232 static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
1233 {
1234     u_char *p, *q;
1235     int n;
1236
1237     p = (u_char *)tuple->TupleData;
1238     q = p + tuple->TupleDataLen;
1239
1240     for (n = 0; n < CISTPL_MAX_DEVICES; n++) {
1241         if (p > q-6) break;
1242         geo->geo[n].buswidth = p[0];
1243         geo->geo[n].erase_block = 1 << (p[1]-1);
1244         geo->geo[n].read_block  = 1 << (p[2]-1);
1245         geo->geo[n].write_block = 1 << (p[3]-1);
1246         geo->geo[n].partition   = 1 << (p[4]-1);
1247         geo->geo[n].interleave  = 1 << (p[5]-1);
1248         p += 6;
1249     }
1250     geo->ngeo = n;
1251     return CS_SUCCESS;
1252 }
1253
1254 /*====================================================================*/
1255
1256 static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2)
1257 {
1258     u_char *p, *q;
1259
1260     if (tuple->TupleDataLen < 10)
1261         return CS_BAD_TUPLE;
1262
1263     p = tuple->TupleData;
1264     q = p + tuple->TupleDataLen;
1265
1266     v2->vers = p[0];
1267     v2->comply = p[1];
1268     v2->dindex = get_unaligned_le16(p +2 );
1269     v2->vspec8 = p[6];
1270     v2->vspec9 = p[7];
1271     v2->nhdr = p[8];
1272     p += 9;
1273     return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL);
1274 }
1275
1276 /*====================================================================*/
1277
1278 static int parse_org(tuple_t *tuple, cistpl_org_t *org)
1279 {
1280     u_char *p, *q;
1281     int i;
1282
1283     p = tuple->TupleData;
1284     q = p + tuple->TupleDataLen;
1285     if (p == q) return CS_BAD_TUPLE;
1286     org->data_org = *p;
1287     if (++p == q) return CS_BAD_TUPLE;
1288     for (i = 0; i < 30; i++) {
1289         org->desc[i] = *p;
1290         if (*p == '\0') break;
1291         if (++p == q) return CS_BAD_TUPLE;
1292     }
1293     return CS_SUCCESS;
1294 }
1295
1296 /*====================================================================*/
1297
1298 static int parse_format(tuple_t *tuple, cistpl_format_t *fmt)
1299 {
1300     u_char *p;
1301
1302     if (tuple->TupleDataLen < 10)
1303         return CS_BAD_TUPLE;
1304
1305     p = tuple->TupleData;
1306
1307     fmt->type = p[0];
1308     fmt->edc = p[1];
1309     fmt->offset = get_unaligned_le32(p + 2);
1310     fmt->length = get_unaligned_le32(p + 6);
1311
1312     return CS_SUCCESS;
1313 }
1314
1315 /*====================================================================*/
1316
1317 int pccard_parse_tuple(tuple_t *tuple, cisparse_t *parse)
1318 {
1319     int ret = CS_SUCCESS;
1320
1321     if (tuple->TupleDataLen > tuple->TupleDataMax)
1322         return CS_BAD_TUPLE;
1323     switch (tuple->TupleCode) {
1324     case CISTPL_DEVICE:
1325     case CISTPL_DEVICE_A:
1326         ret = parse_device(tuple, &parse->device);
1327         break;
1328 #ifdef CONFIG_CARDBUS
1329     case CISTPL_BAR:
1330         ret = parse_bar(tuple, &parse->bar);
1331         break;
1332     case CISTPL_CONFIG_CB:
1333         ret = parse_config_cb(tuple, &parse->config);
1334         break;
1335     case CISTPL_CFTABLE_ENTRY_CB:
1336         ret = parse_cftable_entry_cb(tuple, &parse->cftable_entry_cb);
1337         break;
1338 #endif
1339     case CISTPL_CHECKSUM:
1340         ret = parse_checksum(tuple, &parse->checksum);
1341         break;
1342     case CISTPL_LONGLINK_A:
1343     case CISTPL_LONGLINK_C:
1344         ret = parse_longlink(tuple, &parse->longlink);
1345         break;
1346     case CISTPL_LONGLINK_MFC:
1347         ret = parse_longlink_mfc(tuple, &parse->longlink_mfc);
1348         break;
1349     case CISTPL_VERS_1:
1350         ret = parse_vers_1(tuple, &parse->version_1);
1351         break;
1352     case CISTPL_ALTSTR:
1353         ret = parse_altstr(tuple, &parse->altstr);
1354         break;
1355     case CISTPL_JEDEC_A:
1356     case CISTPL_JEDEC_C:
1357         ret = parse_jedec(tuple, &parse->jedec);
1358         break;
1359     case CISTPL_MANFID:
1360         ret = parse_manfid(tuple, &parse->manfid);
1361         break;
1362     case CISTPL_FUNCID:
1363         ret = parse_funcid(tuple, &parse->funcid);
1364         break;
1365     case CISTPL_FUNCE:
1366         ret = parse_funce(tuple, &parse->funce);
1367         break;
1368     case CISTPL_CONFIG:
1369         ret = parse_config(tuple, &parse->config);
1370         break;
1371     case CISTPL_CFTABLE_ENTRY:
1372         ret = parse_cftable_entry(tuple, &parse->cftable_entry);
1373         break;
1374     case CISTPL_DEVICE_GEO:
1375     case CISTPL_DEVICE_GEO_A:
1376         ret = parse_device_geo(tuple, &parse->device_geo);
1377         break;
1378     case CISTPL_VERS_2:
1379         ret = parse_vers_2(tuple, &parse->vers_2);
1380         break;
1381     case CISTPL_ORG:
1382         ret = parse_org(tuple, &parse->org);
1383         break;
1384     case CISTPL_FORMAT:
1385     case CISTPL_FORMAT_A:
1386         ret = parse_format(tuple, &parse->format);
1387         break;
1388     case CISTPL_NO_LINK:
1389     case CISTPL_LINKTARGET:
1390         ret = CS_SUCCESS;
1391         break;
1392     default:
1393         ret = CS_UNSUPPORTED_FUNCTION;
1394         break;
1395     }
1396     return ret;
1397 }
1398 EXPORT_SYMBOL(pccard_parse_tuple);
1399
1400 /*======================================================================
1401
1402     This is used internally by Card Services to look up CIS stuff.
1403
1404 ======================================================================*/
1405
1406 int pccard_read_tuple(struct pcmcia_socket *s, unsigned int function, cisdata_t code, void *parse)
1407 {
1408     tuple_t tuple;
1409     cisdata_t *buf;
1410     int ret;
1411
1412     buf = kmalloc(256, GFP_KERNEL);
1413     if (buf == NULL)
1414         return CS_OUT_OF_RESOURCE;
1415     tuple.DesiredTuple = code;
1416     tuple.Attributes = TUPLE_RETURN_COMMON;
1417     ret = pccard_get_first_tuple(s, function, &tuple);
1418     if (ret != CS_SUCCESS) goto done;
1419     tuple.TupleData = buf;
1420     tuple.TupleOffset = 0;
1421     tuple.TupleDataMax = 255;
1422     ret = pccard_get_tuple_data(s, &tuple);
1423     if (ret != CS_SUCCESS) goto done;
1424     ret = pccard_parse_tuple(&tuple, parse);
1425 done:
1426     kfree(buf);
1427     return ret;
1428 }
1429 EXPORT_SYMBOL(pccard_read_tuple);
1430
1431 /*======================================================================
1432
1433     This tries to determine if a card has a sensible CIS.  It returns
1434     the number of tuples in the CIS, or 0 if the CIS looks bad.  The
1435     checks include making sure several critical tuples are present and
1436     valid; seeing if the total number of tuples is reasonable; and
1437     looking for tuples that use reserved codes.
1438
1439 ======================================================================*/
1440
1441 int pccard_validate_cis(struct pcmcia_socket *s, unsigned int function, unsigned int *info)
1442 {
1443     tuple_t *tuple;
1444     cisparse_t *p;
1445     unsigned int count = 0;
1446     int ret, reserved, dev_ok = 0, ident_ok = 0;
1447
1448     if (!s)
1449         return CS_BAD_HANDLE;
1450
1451     tuple = kmalloc(sizeof(*tuple), GFP_KERNEL);
1452     if (tuple == NULL)
1453         return CS_OUT_OF_RESOURCE;
1454     p = kmalloc(sizeof(*p), GFP_KERNEL);
1455     if (p == NULL) {
1456         kfree(tuple);
1457         return CS_OUT_OF_RESOURCE;
1458     }
1459
1460     count = reserved = 0;
1461     tuple->DesiredTuple = RETURN_FIRST_TUPLE;
1462     tuple->Attributes = TUPLE_RETURN_COMMON;
1463     ret = pccard_get_first_tuple(s, function, tuple);
1464     if (ret != CS_SUCCESS)
1465         goto done;
1466
1467     /* First tuple should be DEVICE; we should really have either that
1468        or a CFTABLE_ENTRY of some sort */
1469     if ((tuple->TupleCode == CISTPL_DEVICE) ||
1470         (pccard_read_tuple(s, function, CISTPL_CFTABLE_ENTRY, p) == CS_SUCCESS) ||
1471         (pccard_read_tuple(s, function, CISTPL_CFTABLE_ENTRY_CB, p) == CS_SUCCESS))
1472         dev_ok++;
1473
1474     /* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
1475        tuple, for card identification.  Certain old D-Link and Linksys
1476        cards have only a broken VERS_2 tuple; hence the bogus test. */
1477     if ((pccard_read_tuple(s, function, CISTPL_MANFID, p) == CS_SUCCESS) ||
1478         (pccard_read_tuple(s, function, CISTPL_VERS_1, p) == CS_SUCCESS) ||
1479         (pccard_read_tuple(s, function, CISTPL_VERS_2, p) != CS_NO_MORE_ITEMS))
1480         ident_ok++;
1481
1482     if (!dev_ok && !ident_ok)
1483         goto done;
1484
1485     for (count = 1; count < MAX_TUPLES; count++) {
1486         ret = pccard_get_next_tuple(s, function, tuple);
1487         if (ret != CS_SUCCESS) break;
1488         if (((tuple->TupleCode > 0x23) && (tuple->TupleCode < 0x40)) ||
1489             ((tuple->TupleCode > 0x47) && (tuple->TupleCode < 0x80)) ||
1490             ((tuple->TupleCode > 0x90) && (tuple->TupleCode < 0xff)))
1491             reserved++;
1492     }
1493     if ((count == MAX_TUPLES) || (reserved > 5) ||
1494         ((!dev_ok || !ident_ok) && (count > 10)))
1495         count = 0;
1496
1497 done:
1498     if (info)
1499             *info = count;
1500     kfree(tuple);
1501     kfree(p);
1502     return CS_SUCCESS;
1503 }
1504 EXPORT_SYMBOL(pccard_validate_cis);