linux/drivers/pcmcia/cistpl.c
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   1/*
   2 * cistpl.c -- 16-bit PCMCIA Card Information Structure parser
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 *
   8 * The initial developer of the original code is David A. Hinds
   9 * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10 * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11 *
  12 * (C) 1999             David A. Hinds
  13 */
  14
  15#include <linux/module.h>
  16#include <linux/moduleparam.h>
  17#include <linux/kernel.h>
  18#include <linux/string.h>
  19#include <linux/major.h>
  20#include <linux/errno.h>
  21#include <linux/timer.h>
  22#include <linux/slab.h>
  23#include <linux/mm.h>
  24#include <linux/pci.h>
  25#include <linux/ioport.h>
  26#include <linux/io.h>
  27#include <asm/byteorder.h>
  28#include <asm/unaligned.h>
  29
  30#include <pcmcia/ss.h>
  31#include <pcmcia/cisreg.h>
  32#include <pcmcia/cistpl.h>
  33#include "cs_internal.h"
  34
  35static const u_char mantissa[] = {
  36    10, 12, 13, 15, 20, 25, 30, 35,
  37    40, 45, 50, 55, 60, 70, 80, 90
  38};
  39
  40static const u_int exponent[] = {
  41    1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
  42};
  43
  44/* Convert an extended speed byte to a time in nanoseconds */
  45#define SPEED_CVT(v) \
  46    (mantissa[(((v)>>3)&15)-1] * exponent[(v)&7] / 10)
  47/* Convert a power byte to a current in 0.1 microamps */
  48#define POWER_CVT(v) \
  49    (mantissa[((v)>>3)&15] * exponent[(v)&7] / 10)
  50#define POWER_SCALE(v)          (exponent[(v)&7])
  51
  52/* Upper limit on reasonable # of tuples */
  53#define MAX_TUPLES              200
  54
  55/* Bits in IRQInfo1 field */
  56#define IRQ_INFO2_VALID         0x10
  57
  58/* 16-bit CIS? */
  59static int cis_width;
  60module_param(cis_width, int, 0444);
  61
  62void release_cis_mem(struct pcmcia_socket *s)
  63{
  64        mutex_lock(&s->ops_mutex);
  65        if (s->cis_mem.flags & MAP_ACTIVE) {
  66                s->cis_mem.flags &= ~MAP_ACTIVE;
  67                s->ops->set_mem_map(s, &s->cis_mem);
  68                if (s->cis_mem.res) {
  69                        release_resource(s->cis_mem.res);
  70                        kfree(s->cis_mem.res);
  71                        s->cis_mem.res = NULL;
  72                }
  73                iounmap(s->cis_virt);
  74                s->cis_virt = NULL;
  75        }
  76        mutex_unlock(&s->ops_mutex);
  77}
  78
  79/**
  80 * set_cis_map() - map the card memory at "card_offset" into virtual space.
  81 *
  82 * If flags & MAP_ATTRIB, map the attribute space, otherwise
  83 * map the memory space.
  84 *
  85 * Must be called with ops_mutex held.
  86 */
  87static void __iomem *set_cis_map(struct pcmcia_socket *s,
  88                                unsigned int card_offset, unsigned int flags)
  89{
  90        pccard_mem_map *mem = &s->cis_mem;
  91        int ret;
  92
  93        if (!(s->features & SS_CAP_STATIC_MAP) && (mem->res == NULL)) {
  94                mem->res = pcmcia_find_mem_region(0, s->map_size,
  95                                                s->map_size, 0, s);
  96                if (mem->res == NULL) {
  97                        dev_notice(&s->dev, "cs: unable to map card memory!\n");
  98                        return NULL;
  99                }
 100                s->cis_virt = NULL;
 101        }
 102
 103        if (!(s->features & SS_CAP_STATIC_MAP) && (!s->cis_virt))
 104                s->cis_virt = ioremap(mem->res->start, s->map_size);
 105
 106        mem->card_start = card_offset;
 107        mem->flags = flags;
 108
 109        ret = s->ops->set_mem_map(s, mem);
 110        if (ret) {
 111                iounmap(s->cis_virt);
 112                s->cis_virt = NULL;
 113                return NULL;
 114        }
 115
 116        if (s->features & SS_CAP_STATIC_MAP) {
 117                if (s->cis_virt)
 118                        iounmap(s->cis_virt);
 119                s->cis_virt = ioremap(mem->static_start, s->map_size);
 120        }
 121
 122        return s->cis_virt;
 123}
 124
 125
 126/* Bits in attr field */
 127#define IS_ATTR         1
 128#define IS_INDIRECT     8
 129
 130/**
 131 * pcmcia_read_cis_mem() - low-level function to read CIS memory
 132 *
 133 * must be called with ops_mutex held
 134 */
 135int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
 136                 u_int len, void *ptr)
 137{
 138        void __iomem *sys, *end;
 139        unsigned char *buf = ptr;
 140
 141        dev_dbg(&s->dev, "pcmcia_read_cis_mem(%d, %#x, %u)\n", attr, addr, len);
 142
 143        if (attr & IS_INDIRECT) {
 144                /* Indirect accesses use a bunch of special registers at fixed
 145                   locations in common memory */
 146                u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
 147                if (attr & IS_ATTR) {
 148                        addr *= 2;
 149                        flags = ICTRL0_AUTOINC;
 150                }
 151
 152                sys = set_cis_map(s, 0, MAP_ACTIVE |
 153                                ((cis_width) ? MAP_16BIT : 0));
 154                if (!sys) {
 155                        dev_dbg(&s->dev, "could not map memory\n");
 156                        memset(ptr, 0xff, len);
 157                        return -1;
 158                }
 159
 160                writeb(flags, sys+CISREG_ICTRL0);
 161                writeb(addr & 0xff, sys+CISREG_IADDR0);
 162                writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
 163                writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
 164                writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
 165                for ( ; len > 0; len--, buf++)
 166                        *buf = readb(sys+CISREG_IDATA0);
 167        } else {
 168                u_int inc = 1, card_offset, flags;
 169
 170                if (addr > CISTPL_MAX_CIS_SIZE) {
 171                        dev_dbg(&s->dev,
 172                                "attempt to read CIS mem at addr %#x", addr);
 173                        memset(ptr, 0xff, len);
 174                        return -1;
 175                }
 176
 177                flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
 178                if (attr) {
 179                        flags |= MAP_ATTRIB;
 180                        inc++;
 181                        addr *= 2;
 182                }
 183
 184                card_offset = addr & ~(s->map_size-1);
 185                while (len) {
 186                        sys = set_cis_map(s, card_offset, flags);
 187                        if (!sys) {
 188                                dev_dbg(&s->dev, "could not map memory\n");
 189                                memset(ptr, 0xff, len);
 190                                return -1;
 191                        }
 192                        end = sys + s->map_size;
 193                        sys = sys + (addr & (s->map_size-1));
 194                        for ( ; len > 0; len--, buf++, sys += inc) {
 195                                if (sys == end)
 196                                        break;
 197                                *buf = readb(sys);
 198                        }
 199                        card_offset += s->map_size;
 200                        addr = 0;
 201                }
 202        }
 203        dev_dbg(&s->dev, "  %#2.2x %#2.2x %#2.2x %#2.2x ...\n",
 204                *(u_char *)(ptr+0), *(u_char *)(ptr+1),
 205                *(u_char *)(ptr+2), *(u_char *)(ptr+3));
 206        return 0;
 207}
 208
 209
 210/**
 211 * pcmcia_write_cis_mem() - low-level function to write CIS memory
 212 *
 213 * Probably only useful for writing one-byte registers. Must be called
 214 * with ops_mutex held.
 215 */
 216int pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
 217                   u_int len, void *ptr)
 218{
 219        void __iomem *sys, *end;
 220        unsigned char *buf = ptr;
 221
 222        dev_dbg(&s->dev,
 223                "pcmcia_write_cis_mem(%d, %#x, %u)\n", attr, addr, len);
 224
 225        if (attr & IS_INDIRECT) {
 226                /* Indirect accesses use a bunch of special registers at fixed
 227                   locations in common memory */
 228                u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
 229                if (attr & IS_ATTR) {
 230                        addr *= 2;
 231                        flags = ICTRL0_AUTOINC;
 232                }
 233
 234                sys = set_cis_map(s, 0, MAP_ACTIVE |
 235                                ((cis_width) ? MAP_16BIT : 0));
 236                if (!sys) {
 237                        dev_dbg(&s->dev, "could not map memory\n");
 238                        return -EINVAL;
 239                }
 240
 241                writeb(flags, sys+CISREG_ICTRL0);
 242                writeb(addr & 0xff, sys+CISREG_IADDR0);
 243                writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
 244                writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
 245                writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
 246                for ( ; len > 0; len--, buf++)
 247                        writeb(*buf, sys+CISREG_IDATA0);
 248        } else {
 249                u_int inc = 1, card_offset, flags;
 250
 251                flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
 252                if (attr & IS_ATTR) {
 253                        flags |= MAP_ATTRIB;
 254                        inc++;
 255                        addr *= 2;
 256                }
 257
 258                card_offset = addr & ~(s->map_size-1);
 259                while (len) {
 260                        sys = set_cis_map(s, card_offset, flags);
 261                        if (!sys) {
 262                                dev_dbg(&s->dev, "could not map memory\n");
 263                                return -EINVAL;
 264                        }
 265
 266                        end = sys + s->map_size;
 267                        sys = sys + (addr & (s->map_size-1));
 268                        for ( ; len > 0; len--, buf++, sys += inc) {
 269                                if (sys == end)
 270                                        break;
 271                                writeb(*buf, sys);
 272                        }
 273                        card_offset += s->map_size;
 274                        addr = 0;
 275                }
 276        }
 277        return 0;
 278}
 279
 280
 281/**
 282 * read_cis_cache() - read CIS memory or its associated cache
 283 *
 284 * This is a wrapper around read_cis_mem, with the same interface,
 285 * but which caches information, for cards whose CIS may not be
 286 * readable all the time.
 287 */
 288static int read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
 289                        size_t len, void *ptr)
 290{
 291        struct cis_cache_entry *cis;
 292        int ret = 0;
 293
 294        if (s->state & SOCKET_CARDBUS)
 295                return -EINVAL;
 296
 297        mutex_lock(&s->ops_mutex);
 298        if (s->fake_cis) {
 299                if (s->fake_cis_len >= addr+len)
 300                        memcpy(ptr, s->fake_cis+addr, len);
 301                else {
 302                        memset(ptr, 0xff, len);
 303                        ret = -EINVAL;
 304                }
 305                mutex_unlock(&s->ops_mutex);
 306                return ret;
 307        }
 308
 309        list_for_each_entry(cis, &s->cis_cache, node) {
 310                if (cis->addr == addr && cis->len == len && cis->attr == attr) {
 311                        memcpy(ptr, cis->cache, len);
 312                        mutex_unlock(&s->ops_mutex);
 313                        return 0;
 314                }
 315        }
 316
 317        ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr);
 318
 319        if (ret == 0) {
 320                /* Copy data into the cache */
 321                cis = kmalloc(sizeof(struct cis_cache_entry) + len, GFP_KERNEL);
 322                if (cis) {
 323                        cis->addr = addr;
 324                        cis->len = len;
 325                        cis->attr = attr;
 326                        memcpy(cis->cache, ptr, len);
 327                        list_add(&cis->node, &s->cis_cache);
 328                }
 329        }
 330        mutex_unlock(&s->ops_mutex);
 331
 332        return ret;
 333}
 334
 335static void
 336remove_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, u_int len)
 337{
 338        struct cis_cache_entry *cis;
 339
 340        mutex_lock(&s->ops_mutex);
 341        list_for_each_entry(cis, &s->cis_cache, node)
 342                if (cis->addr == addr && cis->len == len && cis->attr == attr) {
 343                        list_del(&cis->node);
 344                        kfree(cis);
 345                        break;
 346                }
 347        mutex_unlock(&s->ops_mutex);
 348}
 349
 350/**
 351 * destroy_cis_cache() - destroy the CIS cache
 352 * @s:          pcmcia_socket for which CIS cache shall be destroyed
 353 *
 354 * This destroys the CIS cache but keeps any fake CIS alive. Must be
 355 * called with ops_mutex held.
 356 */
 357void destroy_cis_cache(struct pcmcia_socket *s)
 358{
 359        struct list_head *l, *n;
 360        struct cis_cache_entry *cis;
 361
 362        list_for_each_safe(l, n, &s->cis_cache) {
 363                cis = list_entry(l, struct cis_cache_entry, node);
 364                list_del(&cis->node);
 365                kfree(cis);
 366        }
 367}
 368
 369/**
 370 * verify_cis_cache() - does the CIS match what is in the CIS cache?
 371 */
 372int verify_cis_cache(struct pcmcia_socket *s)
 373{
 374        struct cis_cache_entry *cis;
 375        char *buf;
 376        int ret;
 377
 378        if (s->state & SOCKET_CARDBUS)
 379                return -EINVAL;
 380
 381        buf = kmalloc(256, GFP_KERNEL);
 382        if (buf == NULL) {
 383                dev_warn(&s->dev, "no memory for verifying CIS\n");
 384                return -ENOMEM;
 385        }
 386        mutex_lock(&s->ops_mutex);
 387        list_for_each_entry(cis, &s->cis_cache, node) {
 388                int len = cis->len;
 389
 390                if (len > 256)
 391                        len = 256;
 392
 393                ret = pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
 394                if (ret || memcmp(buf, cis->cache, len) != 0) {
 395                        kfree(buf);
 396                        mutex_unlock(&s->ops_mutex);
 397                        return -1;
 398                }
 399        }
 400        kfree(buf);
 401        mutex_unlock(&s->ops_mutex);
 402        return 0;
 403}
 404
 405/**
 406 * pcmcia_replace_cis() - use a replacement CIS instead of the card's CIS
 407 *
 408 * For really bad cards, we provide a facility for uploading a
 409 * replacement CIS.
 410 */
 411int pcmcia_replace_cis(struct pcmcia_socket *s,
 412                       const u8 *data, const size_t len)
 413{
 414        if (len > CISTPL_MAX_CIS_SIZE) {
 415                dev_warn(&s->dev, "replacement CIS too big\n");
 416                return -EINVAL;
 417        }
 418        mutex_lock(&s->ops_mutex);
 419        kfree(s->fake_cis);
 420        s->fake_cis = kmalloc(len, GFP_KERNEL);
 421        if (s->fake_cis == NULL) {
 422                dev_warn(&s->dev, "no memory to replace CIS\n");
 423                mutex_unlock(&s->ops_mutex);
 424                return -ENOMEM;
 425        }
 426        s->fake_cis_len = len;
 427        memcpy(s->fake_cis, data, len);
 428        dev_info(&s->dev, "Using replacement CIS\n");
 429        mutex_unlock(&s->ops_mutex);
 430        return 0;
 431}
 432
 433/* The high-level CIS tuple services */
 434
 435struct tuple_flags {
 436        u_int           link_space:4;
 437        u_int           has_link:1;
 438        u_int           mfc_fn:3;
 439        u_int           space:4;
 440};
 441
 442#define LINK_SPACE(f)   (((struct tuple_flags *)(&(f)))->link_space)
 443#define HAS_LINK(f)     (((struct tuple_flags *)(&(f)))->has_link)
 444#define MFC_FN(f)       (((struct tuple_flags *)(&(f)))->mfc_fn)
 445#define SPACE(f)        (((struct tuple_flags *)(&(f)))->space)
 446
 447int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function,
 448                        tuple_t *tuple)
 449{
 450        if (!s)
 451                return -EINVAL;
 452
 453        if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
 454                return -ENODEV;
 455        tuple->TupleLink = tuple->Flags = 0;
 456
 457        /* Assume presence of a LONGLINK_C to address 0 */
 458        tuple->CISOffset = tuple->LinkOffset = 0;
 459        SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
 460
 461        if ((s->functions > 1) && !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
 462                cisdata_t req = tuple->DesiredTuple;
 463                tuple->DesiredTuple = CISTPL_LONGLINK_MFC;
 464                if (pccard_get_next_tuple(s, function, tuple) == 0) {
 465                        tuple->DesiredTuple = CISTPL_LINKTARGET;
 466                        if (pccard_get_next_tuple(s, function, tuple) != 0)
 467                                return -ENOSPC;
 468                } else
 469                        tuple->CISOffset = tuple->TupleLink = 0;
 470                tuple->DesiredTuple = req;
 471        }
 472        return pccard_get_next_tuple(s, function, tuple);
 473}
 474
 475static int follow_link(struct pcmcia_socket *s, tuple_t *tuple)
 476{
 477        u_char link[5];
 478        u_int ofs;
 479        int ret;
 480
 481        if (MFC_FN(tuple->Flags)) {
 482                /* Get indirect link from the MFC tuple */
 483                ret = read_cis_cache(s, LINK_SPACE(tuple->Flags),
 484                                tuple->LinkOffset, 5, link);
 485                if (ret)
 486                        return -1;
 487                ofs = get_unaligned_le32(link + 1);
 488                SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR);
 489                /* Move to the next indirect link */
 490                tuple->LinkOffset += 5;
 491                MFC_FN(tuple->Flags)--;
 492        } else if (HAS_LINK(tuple->Flags)) {
 493                ofs = tuple->LinkOffset;
 494                SPACE(tuple->Flags) = LINK_SPACE(tuple->Flags);
 495                HAS_LINK(tuple->Flags) = 0;
 496        } else
 497                return -1;
 498
 499        if (SPACE(tuple->Flags)) {
 500                /* This is ugly, but a common CIS error is to code the long
 501                   link offset incorrectly, so we check the right spot... */
 502                ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
 503                if (ret)
 504                        return -1;
 505                if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
 506                        (strncmp(link+2, "CIS", 3) == 0))
 507                        return ofs;
 508                remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
 509                /* Then, we try the wrong spot... */
 510                ofs = ofs >> 1;
 511        }
 512        ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
 513        if (ret)
 514                return -1;
 515        if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
 516                (strncmp(link+2, "CIS", 3) == 0))
 517                return ofs;
 518        remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
 519        return -1;
 520}
 521
 522int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function,
 523                        tuple_t *tuple)
 524{
 525        u_char link[2], tmp;
 526        int ofs, i, attr;
 527        int ret;
 528
 529        if (!s)
 530                return -EINVAL;
 531        if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
 532                return -ENODEV;
 533
 534        link[1] = tuple->TupleLink;
 535        ofs = tuple->CISOffset + tuple->TupleLink;
 536        attr = SPACE(tuple->Flags);
 537
 538        for (i = 0; i < MAX_TUPLES; i++) {
 539                if (link[1] == 0xff)
 540                        link[0] = CISTPL_END;
 541                else {
 542                        ret = read_cis_cache(s, attr, ofs, 2, link);
 543                        if (ret)
 544                                return -1;
 545                        if (link[0] == CISTPL_NULL) {
 546                                ofs++;
 547                                continue;
 548                        }
 549                }
 550
 551                /* End of chain?  Follow long link if possible */
 552                if (link[0] == CISTPL_END) {
 553                        ofs = follow_link(s, tuple);
 554                        if (ofs < 0)
 555                                return -ENOSPC;
 556                        attr = SPACE(tuple->Flags);
 557                        ret = read_cis_cache(s, attr, ofs, 2, link);
 558                        if (ret)
 559                                return -1;
 560                }
 561
 562                /* Is this a link tuple?  Make a note of it */
 563                if ((link[0] == CISTPL_LONGLINK_A) ||
 564                        (link[0] == CISTPL_LONGLINK_C) ||
 565                        (link[0] == CISTPL_LONGLINK_MFC) ||
 566                        (link[0] == CISTPL_LINKTARGET) ||
 567                        (link[0] == CISTPL_INDIRECT) ||
 568                        (link[0] == CISTPL_NO_LINK)) {
 569                        switch (link[0]) {
 570                        case CISTPL_LONGLINK_A:
 571                                HAS_LINK(tuple->Flags) = 1;
 572                                LINK_SPACE(tuple->Flags) = attr | IS_ATTR;
 573                                ret = read_cis_cache(s, attr, ofs+2, 4,
 574                                                &tuple->LinkOffset);
 575                                if (ret)
 576                                        return -1;
 577                                break;
 578                        case CISTPL_LONGLINK_C:
 579                                HAS_LINK(tuple->Flags) = 1;
 580                                LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR;
 581                                ret = read_cis_cache(s, attr, ofs+2, 4,
 582                                                &tuple->LinkOffset);
 583                                if (ret)
 584                                        return -1;
 585                                break;
 586                        case CISTPL_INDIRECT:
 587                                HAS_LINK(tuple->Flags) = 1;
 588                                LINK_SPACE(tuple->Flags) = IS_ATTR |
 589                                        IS_INDIRECT;
 590                                tuple->LinkOffset = 0;
 591                                break;
 592                        case CISTPL_LONGLINK_MFC:
 593                                tuple->LinkOffset = ofs + 3;
 594                                LINK_SPACE(tuple->Flags) = attr;
 595                                if (function == BIND_FN_ALL) {
 596                                        /* Follow all the MFC links */
 597                                        ret = read_cis_cache(s, attr, ofs+2,
 598                                                        1, &tmp);
 599                                        if (ret)
 600                                                return -1;
 601                                        MFC_FN(tuple->Flags) = tmp;
 602                                } else {
 603                                        /* Follow exactly one of the links */
 604                                        MFC_FN(tuple->Flags) = 1;
 605                                        tuple->LinkOffset += function * 5;
 606                                }
 607                                break;
 608                        case CISTPL_NO_LINK:
 609                                HAS_LINK(tuple->Flags) = 0;
 610                                break;
 611                        }
 612                        if ((tuple->Attributes & TUPLE_RETURN_LINK) &&
 613                                (tuple->DesiredTuple == RETURN_FIRST_TUPLE))
 614                                break;
 615                } else
 616                        if (tuple->DesiredTuple == RETURN_FIRST_TUPLE)
 617                                break;
 618
 619                if (link[0] == tuple->DesiredTuple)
 620                        break;
 621                ofs += link[1] + 2;
 622        }
 623        if (i == MAX_TUPLES) {
 624                dev_dbg(&s->dev, "cs: overrun in pcmcia_get_next_tuple\n");
 625                return -ENOSPC;
 626        }
 627
 628        tuple->TupleCode = link[0];
 629        tuple->TupleLink = link[1];
 630        tuple->CISOffset = ofs + 2;
 631        return 0;
 632}
 633
 634int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple)
 635{
 636        u_int len;
 637        int ret;
 638
 639        if (!s)
 640                return -EINVAL;
 641
 642        if (tuple->TupleLink < tuple->TupleOffset)
 643                return -ENOSPC;
 644        len = tuple->TupleLink - tuple->TupleOffset;
 645        tuple->TupleDataLen = tuple->TupleLink;
 646        if (len == 0)
 647                return 0;
 648        ret = read_cis_cache(s, SPACE(tuple->Flags),
 649                        tuple->CISOffset + tuple->TupleOffset,
 650                        min(len, (u_int) tuple->TupleDataMax),
 651                        tuple->TupleData);
 652        if (ret)
 653                return -1;
 654        return 0;
 655}
 656
 657
 658/* Parsing routines for individual tuples */
 659
 660static int parse_device(tuple_t *tuple, cistpl_device_t *device)
 661{
 662        int i;
 663        u_char scale;
 664        u_char *p, *q;
 665
 666        p = (u_char *)tuple->TupleData;
 667        q = p + tuple->TupleDataLen;
 668
 669        device->ndev = 0;
 670        for (i = 0; i < CISTPL_MAX_DEVICES; i++) {
 671
 672                if (*p == 0xff)
 673                        break;
 674                device->dev[i].type = (*p >> 4);
 675                device->dev[i].wp = (*p & 0x08) ? 1 : 0;
 676                switch (*p & 0x07) {
 677                case 0:
 678                        device->dev[i].speed = 0;
 679                        break;
 680                case 1:
 681                        device->dev[i].speed = 250;
 682                        break;
 683                case 2:
 684                        device->dev[i].speed = 200;
 685                        break;
 686                case 3:
 687                        device->dev[i].speed = 150;
 688                        break;
 689                case 4:
 690                        device->dev[i].speed = 100;
 691                        break;
 692                case 7:
 693                        if (++p == q)
 694                                return -EINVAL;
 695                        device->dev[i].speed = SPEED_CVT(*p);
 696                        while (*p & 0x80)
 697                                if (++p == q)
 698                                        return -EINVAL;
 699                        break;
 700                default:
 701                        return -EINVAL;
 702                }
 703
 704                if (++p == q)
 705                        return -EINVAL;
 706                if (*p == 0xff)
 707                        break;
 708                scale = *p & 7;
 709                if (scale == 7)
 710                        return -EINVAL;
 711                device->dev[i].size = ((*p >> 3) + 1) * (512 << (scale*2));
 712                device->ndev++;
 713                if (++p == q)
 714                        break;
 715        }
 716
 717        return 0;
 718}
 719
 720
 721static int parse_checksum(tuple_t *tuple, cistpl_checksum_t *csum)
 722{
 723        u_char *p;
 724        if (tuple->TupleDataLen < 5)
 725                return -EINVAL;
 726        p = (u_char *) tuple->TupleData;
 727        csum->addr = tuple->CISOffset + get_unaligned_le16(p) - 2;
 728        csum->len = get_unaligned_le16(p + 2);
 729        csum->sum = *(p + 4);
 730        return 0;
 731}
 732
 733
 734static int parse_longlink(tuple_t *tuple, cistpl_longlink_t *link)
 735{
 736        if (tuple->TupleDataLen < 4)
 737                return -EINVAL;
 738        link->addr = get_unaligned_le32(tuple->TupleData);
 739        return 0;
 740}
 741
 742
 743static int parse_longlink_mfc(tuple_t *tuple, cistpl_longlink_mfc_t *link)
 744{
 745        u_char *p;
 746        int i;
 747
 748        p = (u_char *)tuple->TupleData;
 749
 750        link->nfn = *p; p++;
 751        if (tuple->TupleDataLen <= link->nfn*5)
 752                return -EINVAL;
 753        for (i = 0; i < link->nfn; i++) {
 754                link->fn[i].space = *p; p++;
 755                link->fn[i].addr = get_unaligned_le32(p);
 756                p += 4;
 757        }
 758        return 0;
 759}
 760
 761
 762static int parse_strings(u_char *p, u_char *q, int max,
 763                         char *s, u_char *ofs, u_char *found)
 764{
 765        int i, j, ns;
 766
 767        if (p == q)
 768                return -EINVAL;
 769        ns = 0; j = 0;
 770        for (i = 0; i < max; i++) {
 771                if (*p == 0xff)
 772                        break;
 773                ofs[i] = j;
 774                ns++;
 775                for (;;) {
 776                        s[j++] = (*p == 0xff) ? '\0' : *p;
 777                        if ((*p == '\0') || (*p == 0xff))
 778                                break;
 779                        if (++p == q)
 780                                return -EINVAL;
 781                }
 782                if ((*p == 0xff) || (++p == q))
 783                        break;
 784        }
 785        if (found) {
 786                *found = ns;
 787                return 0;
 788        }
 789
 790        return (ns == max) ? 0 : -EINVAL;
 791}
 792
 793
 794static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1)
 795{
 796        u_char *p, *q;
 797
 798        p = (u_char *)tuple->TupleData;
 799        q = p + tuple->TupleDataLen;
 800
 801        vers_1->major = *p; p++;
 802        vers_1->minor = *p; p++;
 803        if (p >= q)
 804                return -EINVAL;
 805
 806        return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS,
 807                        vers_1->str, vers_1->ofs, &vers_1->ns);
 808}
 809
 810
 811static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr)
 812{
 813        u_char *p, *q;
 814
 815        p = (u_char *)tuple->TupleData;
 816        q = p + tuple->TupleDataLen;
 817
 818        return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS,
 819                        altstr->str, altstr->ofs, &altstr->ns);
 820}
 821
 822
 823static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec)
 824{
 825        u_char *p, *q;
 826        int nid;
 827
 828        p = (u_char *)tuple->TupleData;
 829        q = p + tuple->TupleDataLen;
 830
 831        for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) {
 832                if (p > q-2)
 833                        break;
 834                jedec->id[nid].mfr = p[0];
 835                jedec->id[nid].info = p[1];
 836                p += 2;
 837        }
 838        jedec->nid = nid;
 839        return 0;
 840}
 841
 842
 843static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m)
 844{
 845        if (tuple->TupleDataLen < 4)
 846                return -EINVAL;
 847        m->manf = get_unaligned_le16(tuple->TupleData);
 848        m->card = get_unaligned_le16(tuple->TupleData + 2);
 849        return 0;
 850}
 851
 852
 853static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f)
 854{
 855        u_char *p;
 856        if (tuple->TupleDataLen < 2)
 857                return -EINVAL;
 858        p = (u_char *)tuple->TupleData;
 859        f->func = p[0];
 860        f->sysinit = p[1];
 861        return 0;
 862}
 863
 864
 865static int parse_funce(tuple_t *tuple, cistpl_funce_t *f)
 866{
 867        u_char *p;
 868        int i;
 869        if (tuple->TupleDataLen < 1)
 870                return -EINVAL;
 871        p = (u_char *)tuple->TupleData;
 872        f->type = p[0];
 873        for (i = 1; i < tuple->TupleDataLen; i++)
 874                f->data[i-1] = p[i];
 875        return 0;
 876}
 877
 878
 879static int parse_config(tuple_t *tuple, cistpl_config_t *config)
 880{
 881        int rasz, rmsz, i;
 882        u_char *p;
 883
 884        p = (u_char *)tuple->TupleData;
 885        rasz = *p & 0x03;
 886        rmsz = (*p & 0x3c) >> 2;
 887        if (tuple->TupleDataLen < rasz+rmsz+4)
 888                return -EINVAL;
 889        config->last_idx = *(++p);
 890        p++;
 891        config->base = 0;
 892        for (i = 0; i <= rasz; i++)
 893                config->base += p[i] << (8*i);
 894        p += rasz+1;
 895        for (i = 0; i < 4; i++)
 896                config->rmask[i] = 0;
 897        for (i = 0; i <= rmsz; i++)
 898                config->rmask[i>>2] += p[i] << (8*(i%4));
 899        config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4);
 900        return 0;
 901}
 902
 903/* The following routines are all used to parse the nightmarish
 904 * config table entries.
 905 */
 906
 907static u_char *parse_power(u_char *p, u_char *q, cistpl_power_t *pwr)
 908{
 909        int i;
 910        u_int scale;
 911
 912        if (p == q)
 913                return NULL;
 914        pwr->present = *p;
 915        pwr->flags = 0;
 916        p++;
 917        for (i = 0; i < 7; i++)
 918                if (pwr->present & (1<<i)) {
 919                        if (p == q)
 920                                return NULL;
 921                        pwr->param[i] = POWER_CVT(*p);
 922                        scale = POWER_SCALE(*p);
 923                        while (*p & 0x80) {
 924                                if (++p == q)
 925                                        return NULL;
 926                                if ((*p & 0x7f) < 100)
 927                                        pwr->param[i] +=
 928                                                (*p & 0x7f) * scale / 100;
 929                                else if (*p == 0x7d)
 930                                        pwr->flags |= CISTPL_POWER_HIGHZ_OK;
 931                                else if (*p == 0x7e)
 932                                        pwr->param[i] = 0;
 933                                else if (*p == 0x7f)
 934                                        pwr->flags |= CISTPL_POWER_HIGHZ_REQ;
 935                                else
 936                                        return NULL;
 937                        }
 938                        p++;
 939                }
 940        return p;
 941}
 942
 943
 944static u_char *parse_timing(u_char *p, u_char *q, cistpl_timing_t *timing)
 945{
 946        u_char scale;
 947
 948        if (p == q)
 949                return NULL;
 950        scale = *p;
 951        if ((scale & 3) != 3) {
 952                if (++p == q)
 953                        return NULL;
 954                timing->wait = SPEED_CVT(*p);
 955                timing->waitscale = exponent[scale & 3];
 956        } else
 957                timing->wait = 0;
 958        scale >>= 2;
 959        if ((scale & 7) != 7) {
 960                if (++p == q)
 961                        return NULL;
 962                timing->ready = SPEED_CVT(*p);
 963                timing->rdyscale = exponent[scale & 7];
 964        } else
 965                timing->ready = 0;
 966        scale >>= 3;
 967        if (scale != 7) {
 968                if (++p == q)
 969                        return NULL;
 970                timing->reserved = SPEED_CVT(*p);
 971                timing->rsvscale = exponent[scale];
 972        } else
 973                timing->reserved = 0;
 974        p++;
 975        return p;
 976}
 977
 978
 979static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io)
 980{
 981        int i, j, bsz, lsz;
 982
 983        if (p == q)
 984                return NULL;
 985        io->flags = *p;
 986
 987        if (!(*p & 0x80)) {
 988                io->nwin = 1;
 989                io->win[0].base = 0;
 990                io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK));
 991                return p+1;
 992        }
 993
 994        if (++p == q)
 995                return NULL;
 996        io->nwin = (*p & 0x0f) + 1;
 997        bsz = (*p & 0x30) >> 4;
 998        if (bsz == 3)
 999                bsz++;
1000        lsz = (*p & 0xc0) >> 6;
1001        if (lsz == 3)
1002                lsz++;
1003        p++;
1004
1005        for (i = 0; i < io->nwin; i++) {
1006                io->win[i].base = 0;
1007                io->win[i].len = 1;
1008                for (j = 0; j < bsz; j++, p++) {
1009                        if (p == q)
1010                                return NULL;
1011                        io->win[i].base += *p << (j*8);
1012                }
1013                for (j = 0; j < lsz; j++, p++) {
1014                        if (p == q)
1015                                return NULL;
1016                        io->win[i].len += *p << (j*8);
1017                }
1018        }
1019        return p;
1020}
1021
1022
1023static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem)
1024{
1025        int i, j, asz, lsz, has_ha;
1026        u_int len, ca, ha;
1027
1028        if (p == q)
1029                return NULL;
1030
1031        mem->nwin = (*p & 0x07) + 1;
1032        lsz = (*p & 0x18) >> 3;
1033        asz = (*p & 0x60) >> 5;
1034        has_ha = (*p & 0x80);
1035        if (++p == q)
1036                return NULL;
1037
1038        for (i = 0; i < mem->nwin; i++) {
1039                len = ca = ha = 0;
1040                for (j = 0; j < lsz; j++, p++) {
1041                        if (p == q)
1042                                return NULL;
1043                        len += *p << (j*8);
1044                }
1045                for (j = 0; j < asz; j++, p++) {
1046                        if (p == q)
1047                                return NULL;
1048                        ca += *p << (j*8);
1049                }
1050                if (has_ha)
1051                        for (j = 0; j < asz; j++, p++) {
1052                                if (p == q)
1053                                        return NULL;
1054                                ha += *p << (j*8);
1055                        }
1056                mem->win[i].len = len << 8;
1057                mem->win[i].card_addr = ca << 8;
1058                mem->win[i].host_addr = ha << 8;
1059        }
1060        return p;
1061}
1062
1063
1064static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq)
1065{
1066        if (p == q)
1067                return NULL;
1068        irq->IRQInfo1 = *p; p++;
1069        if (irq->IRQInfo1 & IRQ_INFO2_VALID) {
1070                if (p+2 > q)
1071                        return NULL;
1072                irq->IRQInfo2 = (p[1]<<8) + p[0];
1073                p += 2;
1074        }
1075        return p;
1076}
1077
1078
1079static int parse_cftable_entry(tuple_t *tuple,
1080                               cistpl_cftable_entry_t *entry)
1081{
1082        u_char *p, *q, features;
1083
1084        p = tuple->TupleData;
1085        q = p + tuple->TupleDataLen;
1086        entry->index = *p & 0x3f;
1087        entry->flags = 0;
1088        if (*p & 0x40)
1089                entry->flags |= CISTPL_CFTABLE_DEFAULT;
1090        if (*p & 0x80) {
1091                if (++p == q)
1092                        return -EINVAL;
1093                if (*p & 0x10)
1094                        entry->flags |= CISTPL_CFTABLE_BVDS;
1095                if (*p & 0x20)
1096                        entry->flags |= CISTPL_CFTABLE_WP;
1097                if (*p & 0x40)
1098                        entry->flags |= CISTPL_CFTABLE_RDYBSY;
1099                if (*p & 0x80)
1100                        entry->flags |= CISTPL_CFTABLE_MWAIT;
1101                entry->interface = *p & 0x0f;
1102        } else
1103                entry->interface = 0;
1104
1105        /* Process optional features */
1106        if (++p == q)
1107                return -EINVAL;
1108        features = *p; p++;
1109
1110        /* Power options */
1111        if ((features & 3) > 0) {
1112                p = parse_power(p, q, &entry->vcc);
1113                if (p == NULL)
1114                        return -EINVAL;
1115        } else
1116                entry->vcc.present = 0;
1117        if ((features & 3) > 1) {
1118                p = parse_power(p, q, &entry->vpp1);
1119                if (p == NULL)
1120                        return -EINVAL;
1121        } else
1122                entry->vpp1.present = 0;
1123        if ((features & 3) > 2) {
1124                p = parse_power(p, q, &entry->vpp2);
1125                if (p == NULL)
1126                        return -EINVAL;
1127        } else
1128                entry->vpp2.present = 0;
1129
1130        /* Timing options */
1131        if (features & 0x04) {
1132                p = parse_timing(p, q, &entry->timing);
1133                if (p == NULL)
1134                        return -EINVAL;
1135        } else {
1136                entry->timing.wait = 0;
1137                entry->timing.ready = 0;
1138                entry->timing.reserved = 0;
1139        }
1140
1141        /* I/O window options */
1142        if (features & 0x08) {
1143                p = parse_io(p, q, &entry->io);
1144                if (p == NULL)
1145                        return -EINVAL;
1146        } else
1147                entry->io.nwin = 0;
1148
1149        /* Interrupt options */
1150        if (features & 0x10) {
1151                p = parse_irq(p, q, &entry->irq);
1152                if (p == NULL)
1153                        return -EINVAL;
1154        } else
1155                entry->irq.IRQInfo1 = 0;
1156
1157        switch (features & 0x60) {
1158        case 0x00:
1159                entry->mem.nwin = 0;
1160                break;
1161        case 0x20:
1162                entry->mem.nwin = 1;
1163                entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1164                entry->mem.win[0].card_addr = 0;
1165                entry->mem.win[0].host_addr = 0;
1166                p += 2;
1167                if (p > q)
1168                        return -EINVAL;
1169                break;
1170        case 0x40:
1171                entry->mem.nwin = 1;
1172                entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1173                entry->mem.win[0].card_addr = get_unaligned_le16(p + 2) << 8;
1174                entry->mem.win[0].host_addr = 0;
1175                p += 4;
1176                if (p > q)
1177                        return -EINVAL;
1178                break;
1179        case 0x60:
1180                p = parse_mem(p, q, &entry->mem);
1181                if (p == NULL)
1182                        return -EINVAL;
1183                break;
1184        }
1185
1186        /* Misc features */
1187        if (features & 0x80) {
1188                if (p == q)
1189                        return -EINVAL;
1190                entry->flags |= (*p << 8);
1191                while (*p & 0x80)
1192                        if (++p == q)
1193                                return -EINVAL;
1194                p++;
1195        }
1196
1197        entry->subtuples = q-p;
1198
1199        return 0;
1200}
1201
1202
1203static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
1204{
1205        u_char *p, *q;
1206        int n;
1207
1208        p = (u_char *)tuple->TupleData;
1209        q = p + tuple->TupleDataLen;
1210
1211        for (n = 0; n < CISTPL_MAX_DEVICES; n++) {
1212                if (p > q-6)
1213                        break;
1214                geo->geo[n].buswidth = p[0];
1215                geo->geo[n].erase_block = 1 << (p[1]-1);
1216                geo->geo[n].read_block  = 1 << (p[2]-1);
1217                geo->geo[n].write_block = 1 << (p[3]-1);
1218                geo->geo[n].partition   = 1 << (p[4]-1);
1219                geo->geo[n].interleave  = 1 << (p[5]-1);
1220                p += 6;
1221        }
1222        geo->ngeo = n;
1223        return 0;
1224}
1225
1226
1227static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2)
1228{
1229        u_char *p, *q;
1230
1231        if (tuple->TupleDataLen < 10)
1232                return -EINVAL;
1233
1234        p = tuple->TupleData;
1235        q = p + tuple->TupleDataLen;
1236
1237        v2->vers = p[0];
1238        v2->comply = p[1];
1239        v2->dindex = get_unaligned_le16(p + 2);
1240        v2->vspec8 = p[6];
1241        v2->vspec9 = p[7];
1242        v2->nhdr = p[8];
1243        p += 9;
1244        return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL);
1245}
1246
1247
1248static int parse_org(tuple_t *tuple, cistpl_org_t *org)
1249{
1250        u_char *p, *q;
1251        int i;
1252
1253        p = tuple->TupleData;
1254        q = p + tuple->TupleDataLen;
1255        if (p == q)
1256                return -EINVAL;
1257        org->data_org = *p;
1258        if (++p == q)
1259                return -EINVAL;
1260        for (i = 0; i < 30; i++) {
1261                org->desc[i] = *p;
1262                if (*p == '\0')
1263                        break;
1264                if (++p == q)
1265                        return -EINVAL;
1266        }
1267        return 0;
1268}
1269
1270
1271static int parse_format(tuple_t *tuple, cistpl_format_t *fmt)
1272{
1273        u_char *p;
1274
1275        if (tuple->TupleDataLen < 10)
1276                return -EINVAL;
1277
1278        p = tuple->TupleData;
1279
1280        fmt->type = p[0];
1281        fmt->edc = p[1];
1282        fmt->offset = get_unaligned_le32(p + 2);
1283        fmt->length = get_unaligned_le32(p + 6);
1284
1285        return 0;
1286}
1287
1288
1289int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse)
1290{
1291        int ret = 0;
1292
1293        if (tuple->TupleDataLen > tuple->TupleDataMax)
1294                return -EINVAL;
1295        switch (tuple->TupleCode) {
1296        case CISTPL_DEVICE:
1297        case CISTPL_DEVICE_A:
1298                ret = parse_device(tuple, &parse->device);
1299                break;
1300        case CISTPL_CHECKSUM:
1301                ret = parse_checksum(tuple, &parse->checksum);
1302                break;
1303        case CISTPL_LONGLINK_A:
1304        case CISTPL_LONGLINK_C:
1305                ret = parse_longlink(tuple, &parse->longlink);
1306                break;
1307        case CISTPL_LONGLINK_MFC:
1308                ret = parse_longlink_mfc(tuple, &parse->longlink_mfc);
1309                break;
1310        case CISTPL_VERS_1:
1311                ret = parse_vers_1(tuple, &parse->version_1);
1312                break;
1313        case CISTPL_ALTSTR:
1314                ret = parse_altstr(tuple, &parse->altstr);
1315                break;
1316        case CISTPL_JEDEC_A:
1317        case CISTPL_JEDEC_C:
1318                ret = parse_jedec(tuple, &parse->jedec);
1319                break;
1320        case CISTPL_MANFID:
1321                ret = parse_manfid(tuple, &parse->manfid);
1322                break;
1323        case CISTPL_FUNCID:
1324                ret = parse_funcid(tuple, &parse->funcid);
1325                break;
1326        case CISTPL_FUNCE:
1327                ret = parse_funce(tuple, &parse->funce);
1328                break;
1329        case CISTPL_CONFIG:
1330                ret = parse_config(tuple, &parse->config);
1331                break;
1332        case CISTPL_CFTABLE_ENTRY:
1333                ret = parse_cftable_entry(tuple, &parse->cftable_entry);
1334                break;
1335        case CISTPL_DEVICE_GEO:
1336        case CISTPL_DEVICE_GEO_A:
1337                ret = parse_device_geo(tuple, &parse->device_geo);
1338                break;
1339        case CISTPL_VERS_2:
1340                ret = parse_vers_2(tuple, &parse->vers_2);
1341                break;
1342        case CISTPL_ORG:
1343                ret = parse_org(tuple, &parse->org);
1344                break;
1345        case CISTPL_FORMAT:
1346        case CISTPL_FORMAT_A:
1347                ret = parse_format(tuple, &parse->format);
1348                break;
1349        case CISTPL_NO_LINK:
1350        case CISTPL_LINKTARGET:
1351                ret = 0;
1352                break;
1353        default:
1354                ret = -EINVAL;
1355                break;
1356        }
1357        if (ret)
1358                pr_debug("parse_tuple failed %d\n", ret);
1359        return ret;
1360}
1361EXPORT_SYMBOL(pcmcia_parse_tuple);
1362
1363
1364/**
1365 * pccard_validate_cis() - check whether card has a sensible CIS
1366 * @s:          the struct pcmcia_socket we are to check
1367 * @info:       returns the number of tuples in the (valid) CIS, or 0
1368 *
1369 * This tries to determine if a card has a sensible CIS.  In @info, it
1370 * returns the number of tuples in the CIS, or 0 if the CIS looks bad. The
1371 * checks include making sure several critical tuples are present and
1372 * valid; seeing if the total number of tuples is reasonable; and
1373 * looking for tuples that use reserved codes.
1374 *
1375 * The function returns 0 on success.
1376 */
1377int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
1378{
1379        tuple_t *tuple;
1380        cisparse_t *p;
1381        unsigned int count = 0;
1382        int ret, reserved, dev_ok = 0, ident_ok = 0;
1383
1384        if (!s)
1385                return -EINVAL;
1386
1387        if (s->functions || !(s->state & SOCKET_PRESENT)) {
1388                WARN_ON(1);
1389                return -EINVAL;
1390        }
1391
1392        /* We do not want to validate the CIS cache... */
1393        mutex_lock(&s->ops_mutex);
1394        destroy_cis_cache(s);
1395        mutex_unlock(&s->ops_mutex);
1396
1397        tuple = kmalloc(sizeof(*tuple), GFP_KERNEL);
1398        if (tuple == NULL) {
1399                dev_warn(&s->dev, "no memory to validate CIS\n");
1400                return -ENOMEM;
1401        }
1402        p = kmalloc(sizeof(*p), GFP_KERNEL);
1403        if (p == NULL) {
1404                kfree(tuple);
1405                dev_warn(&s->dev, "no memory to validate CIS\n");
1406                return -ENOMEM;
1407        }
1408
1409        count = reserved = 0;
1410        tuple->DesiredTuple = RETURN_FIRST_TUPLE;
1411        tuple->Attributes = TUPLE_RETURN_COMMON;
1412        ret = pccard_get_first_tuple(s, BIND_FN_ALL, tuple);
1413        if (ret != 0)
1414                goto done;
1415
1416        /* First tuple should be DEVICE; we should really have either that
1417           or a CFTABLE_ENTRY of some sort */
1418        if ((tuple->TupleCode == CISTPL_DEVICE) ||
1419            (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY, p)) ||
1420            (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY_CB, p)))
1421                dev_ok++;
1422
1423        /* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
1424           tuple, for card identification.  Certain old D-Link and Linksys
1425           cards have only a broken VERS_2 tuple; hence the bogus test. */
1426        if ((pccard_read_tuple(s, BIND_FN_ALL, CISTPL_MANFID, p) == 0) ||
1427            (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_1, p) == 0) ||
1428            (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_2, p) != -ENOSPC))
1429                ident_ok++;
1430
1431        if (!dev_ok && !ident_ok)
1432                goto done;
1433
1434        for (count = 1; count < MAX_TUPLES; count++) {
1435                ret = pccard_get_next_tuple(s, BIND_FN_ALL, tuple);
1436                if (ret != 0)
1437                        break;
1438                if (((tuple->TupleCode > 0x23) && (tuple->TupleCode < 0x40)) ||
1439                    ((tuple->TupleCode > 0x47) && (tuple->TupleCode < 0x80)) ||
1440                    ((tuple->TupleCode > 0x90) && (tuple->TupleCode < 0xff)))
1441                        reserved++;
1442        }
1443        if ((count == MAX_TUPLES) || (reserved > 5) ||
1444                ((!dev_ok || !ident_ok) && (count > 10)))
1445                count = 0;
1446
1447        ret = 0;
1448
1449done:
1450        /* invalidate CIS cache on failure */
1451        if (!dev_ok || !ident_ok || !count) {
1452                mutex_lock(&s->ops_mutex);
1453                destroy_cis_cache(s);
1454                mutex_unlock(&s->ops_mutex);
1455                /* We differentiate between dev_ok, ident_ok and count
1456                   failures to allow for an override for anonymous cards
1457                   in ds.c */
1458                if (!dev_ok || !ident_ok)
1459                        ret = -EIO;
1460                else
1461                        ret = -EFAULT;
1462        }
1463
1464        if (info)
1465                *info = count;
1466        kfree(tuple);
1467        kfree(p);
1468        return ret;
1469}
1470
1471
1472#define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
1473
1474static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf,
1475                                  loff_t off, size_t count)
1476{
1477        tuple_t tuple;
1478        int status, i;
1479        loff_t pointer = 0;
1480        ssize_t ret = 0;
1481        u_char *tuplebuffer;
1482        u_char *tempbuffer;
1483
1484        tuplebuffer = kmalloc_array(256, sizeof(u_char), GFP_KERNEL);
1485        if (!tuplebuffer)
1486                return -ENOMEM;
1487
1488        tempbuffer = kmalloc_array(258, sizeof(u_char), GFP_KERNEL);
1489        if (!tempbuffer) {
1490                ret = -ENOMEM;
1491                goto free_tuple;
1492        }
1493
1494        memset(&tuple, 0, sizeof(tuple_t));
1495
1496        tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
1497        tuple.DesiredTuple = RETURN_FIRST_TUPLE;
1498        tuple.TupleOffset = 0;
1499
1500        status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
1501        while (!status) {
1502                tuple.TupleData = tuplebuffer;
1503                tuple.TupleDataMax = 255;
1504                memset(tuplebuffer, 0, sizeof(u_char) * 255);
1505
1506                status = pccard_get_tuple_data(s, &tuple);
1507                if (status)
1508                        break;
1509
1510                if (off < (pointer + 2 + tuple.TupleDataLen)) {
1511                        tempbuffer[0] = tuple.TupleCode & 0xff;
1512                        tempbuffer[1] = tuple.TupleLink & 0xff;
1513                        for (i = 0; i < tuple.TupleDataLen; i++)
1514                                tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
1515
1516                        for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
1517                                if (((i + pointer) >= off) &&
1518                                    (i + pointer) < (off + count)) {
1519                                        buf[ret] = tempbuffer[i];
1520                                        ret++;
1521                                }
1522                        }
1523                }
1524
1525                pointer += 2 + tuple.TupleDataLen;
1526
1527                if (pointer >= (off + count))
1528                        break;
1529
1530                if (tuple.TupleCode == CISTPL_END)
1531                        break;
1532                status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
1533        }
1534
1535        kfree(tempbuffer);
1536 free_tuple:
1537        kfree(tuplebuffer);
1538
1539        return ret;
1540}
1541
1542
1543static ssize_t pccard_show_cis(struct file *filp, struct kobject *kobj,
1544                               struct bin_attribute *bin_attr,
1545                               char *buf, loff_t off, size_t count)
1546{
1547        unsigned int size = 0x200;
1548
1549        if (off >= size)
1550                count = 0;
1551        else {
1552                struct pcmcia_socket *s;
1553                unsigned int chains = 1;
1554
1555                if (off + count > size)
1556                        count = size - off;
1557
1558                s = to_socket(container_of(kobj, struct device, kobj));
1559
1560                if (!(s->state & SOCKET_PRESENT))
1561                        return -ENODEV;
1562                if (!s->functions && pccard_validate_cis(s, &chains))
1563                        return -EIO;
1564                if (!chains)
1565                        return -ENODATA;
1566
1567                count = pccard_extract_cis(s, buf, off, count);
1568        }
1569
1570        return count;
1571}
1572
1573
1574static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj,
1575                                struct bin_attribute *bin_attr,
1576                                char *buf, loff_t off, size_t count)
1577{
1578        struct pcmcia_socket *s;
1579        int error;
1580
1581        s = to_socket(container_of(kobj, struct device, kobj));
1582
1583        if (off)
1584                return -EINVAL;
1585
1586        if (count >= CISTPL_MAX_CIS_SIZE)
1587                return -EINVAL;
1588
1589        if (!(s->state & SOCKET_PRESENT))
1590                return -ENODEV;
1591
1592        error = pcmcia_replace_cis(s, buf, count);
1593        if (error)
1594                return -EIO;
1595
1596        pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
1597
1598        return count;
1599}
1600
1601
1602const struct bin_attribute pccard_cis_attr = {
1603        .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
1604        .size = 0x200,
1605        .read = pccard_show_cis,
1606        .write = pccard_store_cis,
1607};
1608