cvs.zerfleddert.de Git - usb-driver/blob - usb-driver.c

   1 /* libusb/ppdev connector for XILINX impact
   2  *
   3  * Copyright (c) 2007 Michael Gernoth <michael@gernoth.net>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to
   7  * deal in the Software without restriction, including without limitation the
   8  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   9  * sell copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #define _GNU_SOURCE 1
  25
  26 #include <dlfcn.h>
  27 #include <stdarg.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <fcntl.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <sys/time.h>
  35 #include <stdio.h>
  36 #include <signal.h>
  37 #include <errno.h>
  38 #include <inttypes.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/utsname.h>
  41 #include <bits/wordsize.h>
  42 #include "usb-driver.h"
  43 #include "config.h"
  44 #include "xpcu.h"
  45
  46 static int (*ioctl_func) (int, int, void *) = NULL;
  47 static int *windrvrfds = NULL;
  48 static int windrvrfds_count = 0;
  49 static unsigned long ppbase = 0;
  50 static unsigned long ecpbase = 0;
  51 static struct parport_config *pport = NULL;
  52 static FILE *modulesfp = NULL;
  53 static FILE *baseaddrfp = NULL;
  54 static int baseaddrnum = 0;
  55 static int modules_read = 0;
  56
  57 #define NO_WINDRVR 1
  58
  59 void hexdump(unsigned char *buf, int len, char *prefix) {
  60         int i;
  61
  62         fprintf(stderr, "%s ", prefix);
  63         for(i=0; i<len; i++) {
  64                 fprintf(stderr,"%02x ", buf[i]);
  65                 if ((i % 16) == 15)
  66                         fprintf(stderr,"\n%s ", prefix);
  67         }
  68         fprintf(stderr,"\n");
  69 }
  70
  71
  72 static int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
  73         struct header_struct* wdheader = (struct header_struct*)wdioctl;
  74         struct version_struct *version;
  75         int ret = 0;
  76
  77         if (wdheader->magic != MAGIC) {
  78                 fprintf(stderr,"!!!ERROR: magic header does not match!!!\n");
  79                 return (*ioctl_func) (fd, request, wdioctl);
  80         }
  81
  82         switch(request & ~(0xc0000000)) {
  83                 case VERSION:
  84                         version = (struct version_struct*)(wdheader->data);
  85                         strcpy(version->version, "libusb-driver.so version: " USB_DRIVER_VERSION);
  86                         version->versionul = 802;
  87                         DPRINTF("VERSION\n");
  88                         break;
  89
  90                 case LICENSE:
  91                         DPRINTF("LICENSE\n");
  92                         break;
  93
  94                 case CARD_REGISTER_OLD:
  95                 case CARD_REGISTER:
  96                         DPRINTF("CARD_REGISTER\n");
  97                         {
  98                                 struct card_register* cr = (struct card_register*)(wdheader->data);
  99
 100                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 101                                 cr->Card.dwItems,
 102                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 103                                 cr->Card.Item[0].I.IO.dwBytes,
 104                                 cr->Card.Item[0].I.IO.dwBar);
 105
 106                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 107                                 cr->Card.dwItems,
 108                                 (unsigned long)cr->Card.Item[1].I.IO.dwAddr,
 109                                 cr->Card.Item[1].I.IO.dwBytes,
 110                                 cr->Card.Item[1].I.IO.dwBar);
 111 #ifndef NO_WINDRVR
 112                                 ret = (*ioctl_func) (fd, request, wdioctl);
 113 #else
 114
 115                                 pport = config_get((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 116                                 if (!pport)
 117                                         break;
 118
 119                                 ret = pport->open((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 120
 121                                 ppbase = (unsigned long)cr->Card.Item[0].I.IO.dwAddr;
 122
 123                                 if (cr->Card.dwItems > 1 && cr->Card.Item[1].I.IO.dwAddr)
 124                                         ecpbase = (unsigned long)cr->Card.Item[1].I.IO.dwAddr;
 125
 126                                 if (ret >= 0) {
 127                                         cr->hCard = ret;
 128                                 } else {
 129                                         cr->hCard = 0;
 130                                 }
 131 #endif
 132                                 DPRINTF("<-hCard: %lu\n", cr->hCard);
 133                         }
 134                         break;
 135
 136                 case USB_TRANSFER:
 137                         DPRINTF("USB_TRANSFER\n");
 138                         {
 139                                 struct usb_transfer *ut = (struct usb_transfer*)(wdheader->data);
 140
 141 #ifdef DEBUG
 142                                 DPRINTF("-> unique: 0x%lx, pipe: %lu, read: %lu, options: %lx, size: %lu, timeout: %lx\n",
 143                                 ut->dwUniqueID, ut->dwPipeNum, ut->fRead,
 144                                 ut->dwOptions, ut->dwBufferSize, ut->dwTimeout);
 145                                 if (ut->dwPipeNum == 0) {
 146                                         DPRINTF("-> setup packet:");
 147                                         hexdump(ut->SetupPacket, 8, "");
 148                                 }
 149
 150                                 if (!ut->fRead && ut->dwBufferSize)
 151                                 {
 152                                         hexdump(ut->pBuffer, ut->dwBufferSize, "->");
 153                                 }
 154 #endif
 155
 156 #ifndef NO_WINDRVR
 157                                 ret = (*ioctl_func) (fd, request, wdioctl);
 158 #else
 159                                 ret = xpcu_transfer(ut);
 160 #endif
 161
 162 #ifdef DEBUG
 163                                 DPRINTF("Transferred: %lu (%s)\n",ut->dwBytesTransferred, (ut->fRead?"read":"write"));
 164                                 if (ut->fRead && ut->dwBytesTransferred)
 165                                 {
 166                                         hexdump(ut->pBuffer, ut->dwBytesTransferred, "<-");
 167                                 }
 168 #endif
 169                         }
 170                         break;
 171
 172                 case INT_ENABLE_OLD:
 173                 case INT_ENABLE:
 174                         DPRINTF("INT_ENABLE\n");
 175                         {
 176                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 177
 178                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 179                                 it->hInterrupt, it->dwOptions,
 180                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 181                                 it->dwLost, it->fStopped);
 182
 183 #ifndef NO_WINDRVR
 184                                 ret = (*ioctl_func) (fd, request, wdioctl);
 185 #else
 186                                 ret = xpcu_int_state(it, ENABLE_INTERRUPT);
 187 #endif
 188
 189                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 190                                 it->hInterrupt, it->dwOptions,
 191                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 192                                 it->dwLost, it->fStopped);
 193                         }
 194
 195                         break;
 196
 197                 case INT_DISABLE:
 198                         DPRINTF("INT_DISABLE\n");
 199                         {
 200                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 201
 202                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 203                                 it->hInterrupt, it->dwOptions,
 204                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 205                                 it->dwLost, it->fStopped);
 206 #ifndef NO_WINDRVR
 207                                 ret = (*ioctl_func) (fd, request, wdioctl);
 208 #else
 209                                 ret = xpcu_int_state(it, DISABLE_INTERRUPT);
 210 #endif
 211                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 212                                 it->hInterrupt, it->dwOptions,
 213                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 214                                 it->dwLost, it->fStopped);
 215                         }
 216                         break;
 217
 218                 case USB_SET_INTERFACE:
 219                         DPRINTF("USB_SET_INTERFACE\n");
 220                         {
 221                                 struct usb_set_interface *usi = (struct usb_set_interface*)(wdheader->data);
 222
 223                                 DPRINTF("-> unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 224                                 usi->dwUniqueID, usi->dwInterfaceNum,
 225                                 usi->dwAlternateSetting, usi->dwOptions);
 226 #ifndef NO_WINDRVR
 227                                 ret = (*ioctl_func) (fd, request, wdioctl);
 228 #else
 229                                 ret = xpcu_set_interface(usi);
 230 #endif
 231                                 DPRINTF("<- unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 232                                 usi->dwUniqueID, usi->dwInterfaceNum,
 233                                 usi->dwAlternateSetting, usi->dwOptions);
 234                         }
 235                         break;
 236
 237                 case USB_GET_DEVICE_DATA_OLD:
 238                 case USB_GET_DEVICE_DATA:
 239                         DPRINTF("USB_GET_DEVICE_DATA\n");
 240                         {
 241                                 struct usb_get_device_data *ugdd = (struct usb_get_device_data*)(wdheader->data);
 242
 243                                 DPRINTF("-> unique: 0x%lx, bytes: %lu, options: %lx\n",
 244                                 ugdd->dwUniqueID, ugdd->dwBytes,
 245                                 ugdd->dwOptions);
 246
 247                                 ret = xpcu_deviceinfo(ugdd);
 248
 249                         }
 250                         break;
 251
 252                 case EVENT_REGISTER_OLD:
 253                 case EVENT_REGISTER:
 254                         DPRINTF("EVENT_REGISTER\n");
 255                         {
 256                                 struct event *e = (struct event*)(wdheader->data);
 257 #ifdef DEBUG
 258                                 int i;
 259 #endif
 260
 261                                 DPRINTF("-> handle: 0x%lx, action: %lu, status: %lu, eventid: %lu, cardtype: %lu, kplug: %lu, options: %lu, dev: %lx:%lx, unique: 0x%lx, ver: %lu, nummatch: %lu\n",
 262                                 e->handle, e->dwAction,
 263                                 e->dwStatus, e->dwEventId, e->dwCardType,
 264                                 e->hKernelPlugIn, e->dwOptions,
 265                                 e->u.Usb.deviceId.dwVendorId,
 266                                 e->u.Usb.deviceId.dwProductId,
 267                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 268                                 e->dwNumMatchTables);
 269
 270 #ifndef NO_WINDRVR
 271                                 ret = (*ioctl_func) (fd, request, wdioctl);
 272 #else
 273                                 ret = xpcu_find(e);
 274 #endif
 275
 276 #ifdef DEBUG
 277                                 DPRINTF("<- handle: 0x%lx, action: %lu, status: %lu, eventid: %lu, cardtype: %lu, kplug: %lu, options: %lu, dev: %lx:%lx, unique: 0x%lx, ver: %lu, nummatch: %lu\n",
 278                                 e->handle, e->dwAction,
 279                                 e->dwStatus, e->dwEventId, e->dwCardType,
 280                                 e->hKernelPlugIn, e->dwOptions,
 281                                 e->u.Usb.deviceId.dwVendorId,
 282                                 e->u.Usb.deviceId.dwProductId,
 283                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 284                                 e->dwNumMatchTables);
 285
 286                                 for (i = 0; i < e->dwNumMatchTables; i++)
 287                                         DPRINTF("match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 288                                         e->matchTables[i].VendorId,
 289                                         e->matchTables[i].ProductId,
 290                                         e->matchTables[i].bDeviceClass,
 291                                         e->matchTables[i].bDeviceSubClass,
 292                                         e->matchTables[i].bInterfaceClass,
 293                                         e->matchTables[i].bInterfaceSubClass,
 294                                         e->matchTables[i].bInterfaceProtocol);
 295 #endif
 296                         }
 297                         break;
 298
 299                 case TRANSFER_OLD:
 300                 case TRANSFER:
 301                         DPRINTF("TRANSFER\n");
 302                         {
 303                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 304
 305 #ifndef NO_WINDRVR
 306                                 ret = (*ioctl_func) (fd, request, wdioctl);
 307 #else
 308                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, 1);
 309 #endif
 310                         }
 311                         break;
 312
 313                 case MULTI_TRANSFER_OLD:
 314                 case MULTI_TRANSFER:
 315                         DPRINTF("MULTI_TRANSFER\n");
 316                         {
 317                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 318                                 unsigned long num = wdheader->size/sizeof(WD_TRANSFER);
 319 #ifndef NO_WINDRVR
 320                                 ret = (*ioctl_func) (fd, request, wdioctl);
 321 #else
 322                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, num);
 323 #endif
 324                         }
 325                         break;
 326
 327                 case EVENT_UNREGISTER:
 328                         {
 329                                 struct event *e = (struct event*)(wdheader->data);
 330
 331                                 DPRINTF("EVENT_UNREGISTER\n");
 332 #ifndef NO_WINDRVR
 333                                 ret = (*ioctl_func) (fd, request, wdioctl);
 334 #else
 335                                 ret = xpcu_close(e);
 336 #endif
 337                         }
 338                         break;
 339
 340                 case INT_WAIT:
 341                         DPRINTF("INT_WAIT\n");
 342                         {
 343                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 344
 345                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 346                                 it->hInterrupt, it->dwOptions,
 347                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 348                                 it->dwLost, it->fStopped);
 349
 350 #ifndef NO_WINDRVR
 351                                 ret = (*ioctl_func) (fd, request, wdioctl);
 352 #else
 353                                 ret = xpcu_int_wait(it);
 354 #endif
 355
 356                                 DPRINTF("<- INT_WAIT_RETURN: Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 357                                 it->hInterrupt, it->dwOptions, it->dwCmds,
 358                                 it->fEnableOk, it->dwCounter, it->dwLost,
 359                                 it->fStopped);
 360                         }
 361                         break;
 362
 363                 case CARD_UNREGISTER:
 364                         DPRINTF("CARD_UNREGISTER\n");
 365                         {
 366                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 367
 368                                 DPRINTF("-> Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 369                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 370                                 cr->Card.Item[0].I.IO.dwBytes,
 371                                 cr->Card.Item[0].I.IO.dwBar);
 372
 373                                 DPRINTF("-> hCard: %lu\n", cr->hCard);
 374
 375 #ifndef NO_WINDRVR
 376                                 ret = (*ioctl_func) (fd, request, wdioctl);
 377 #else
 378                                 if (pport)
 379                                         pport->close(cr->hCard);
 380
 381                                 pport = NULL;
 382 #endif
 383                         }
 384                         break;
 385
 386                 case EVENT_PULL:
 387                         DPRINTF("EVENT_PULL\n");
 388                         {
 389                                 struct event *e = (struct event*)(wdheader->data);
 390 #ifdef DEBUG
 391                                 int i;
 392
 393                                 DPRINTF("-> handle: 0x%lx, action: %lu, status: %lu, eventid: %lu, cardtype: %lx, kplug: %lu, options: %lu, dev: %lx:%lx, unique: 0x%lx, ver: %lu, nummatch: %lu\n",
 394                                 e->handle, e->dwAction, e->dwStatus,
 395                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 396                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 397                                 e->u.Usb.deviceId.dwProductId,
 398                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 399                                 e->dwNumMatchTables);
 400
 401                                 for (i = 0; i < e->dwNumMatchTables; i++)
 402                                         DPRINTF("-> match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 403                                         e->matchTables[i].VendorId,
 404                                         e->matchTables[i].ProductId,
 405                                         e->matchTables[i].bDeviceClass,
 406                                         e->matchTables[i].bDeviceSubClass,
 407                                         e->matchTables[i].bInterfaceClass,
 408                                         e->matchTables[i].bInterfaceSubClass,
 409                                         e->matchTables[i].bInterfaceProtocol);
 410 #endif
 411
 412 #ifndef NO_WINDRVR
 413                                 ret = (*ioctl_func) (fd, request, wdioctl);
 414 #else
 415                                 ret = xpcu_found(e);
 416 #endif
 417
 418 #ifdef DEBUG
 419                                 DPRINTF("<- handle: 0x%lx, action: %lu, status: %lu, eventid: %lu, cardtype: %lx, kplug: %lu, options: %lu, dev: %lx:%lx, unique: 0x%lx, ver: %lu, nummatch: %lu\n",
 420                                 e->handle, e->dwAction, e->dwStatus,
 421                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 422                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 423                                 e->u.Usb.deviceId.dwProductId,
 424                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 425                                 e->dwNumMatchTables);
 426
 427                                 for (i = 0; i < e->dwNumMatchTables; i++)
 428                                         DPRINTF("<- match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 429                                         e->matchTables[i].VendorId,
 430                                         e->matchTables[i].ProductId,
 431                                         e->matchTables[i].bDeviceClass,
 432                                         e->matchTables[i].bDeviceSubClass,
 433                                         e->matchTables[i].bInterfaceClass,
 434                                         e->matchTables[i].bInterfaceSubClass,
 435                                         e->matchTables[i].bInterfaceProtocol);
 436 #endif
 437
 438                         }
 439                         break;
 440
 441                 default:
 442                         fprintf(stderr,"!!!Unsupported IOCTL: %x!!!\n", request);
 443 #ifndef NO_WINDRVR
 444                         ret = (*ioctl_func) (fd, request, wdioctl);
 445 #endif
 446                         break;
 447         }
 448
 449         return ret;
 450 }
 451
 452 int ioctl(int fd, unsigned long int request, ...) {
 453         va_list args;
 454         void *argp;
 455         int i;
 456
 457         if (!ioctl_func)
 458                 ioctl_func = (int (*) (int, int, void *)) dlsym (RTLD_NEXT, "ioctl");
 459
 460         va_start (args, request);
 461         argp = va_arg (args, void *);
 462         va_end (args);
 463
 464         for (i = 0; i < windrvrfds_count; i++) {
 465                 if (fd == windrvrfds[i])
 466                         return do_wdioctl(fd, request, argp);
 467         }
 468
 469         return (*ioctl_func) (fd, request, argp);
 470 }
 471
 472 int open (const char *pathname, int flags, ...) {
 473         static int (*func) (const char *, int, mode_t) = NULL;
 474         mode_t mode = 0;
 475         va_list args;
 476         int fd;
 477
 478         if (!func)
 479                 func = (int (*) (const char *, int, mode_t)) dlsym (RTLD_NEXT, "open");
 480
 481         if (flags & O_CREAT) {
 482                 va_start(args, flags);
 483                 mode = va_arg(args, mode_t);
 484                 va_end(args);
 485         }
 486
 487         if (!strcmp (pathname, "/dev/windrvr6")) {
 488                 DPRINTF("opening windrvr6 (%d)\n", windrvrfds_count);
 489                 windrvrfds = realloc(windrvrfds, sizeof(int) * (++windrvrfds_count));
 490                 if (!windrvrfds)
 491                         return -ENOMEM;
 492
 493 #ifdef NO_WINDRVR
 494                 windrvrfds[windrvrfds_count-1] = fd = (*func) ("/dev/null", flags, mode);
 495 #else
 496                 windrvrfds[windrvrfds_count-1] = fd = (*func) (pathname, flags, mode);
 497 #endif
 498
 499                 return fd;
 500         }
 501
 502         return (*func) (pathname, flags, mode);
 503 }
 504
 505 int close(int fd) {
 506         static int (*func) (int) = NULL;
 507         int i;
 508
 509         if (!func)
 510                 func = (int (*) (int)) dlsym(RTLD_NEXT, "close");
 511
 512         for (i = 0; i < windrvrfds_count; i++) {
 513                 if (fd == windrvrfds[i] && windrvrfds[i] >= 0) {
 514                         int remaining = windrvrfds_count - (i + 1);
 515                         DPRINTF("close windrvr6 (%d)\n", i);
 516                         if (remaining)
 517                                 memmove(&(windrvrfds[i]), &(windrvrfds[i+1]), remaining * sizeof(int));
 518                         windrvrfds = realloc(windrvrfds, sizeof(int) * --windrvrfds_count);
 519                         if (!windrvrfds_count)
 520                                 windrvrfds = NULL;
 521                         break;
 522                 }
 523         }
 524
 525         return (*func) (fd);
 526 }
 527
 528 FILE *fopen(const char *path, const char *mode) {
 529         FILE *ret;
 530         static FILE* (*func) (const char*, const char*) = NULL;
 531         char buf[256];
 532         int i;
 533
 534         if (!func)
 535                 func = (FILE* (*) (const char*, const char*)) dlsym(RTLD_NEXT, "fopen");
 536
 537         for (i = 0; i < 4; i++) {
 538                 snprintf(buf, sizeof(buf), "/proc/sys/dev/parport/parport%d/base-addr", i);
 539                 if (!strcmp(path, buf)) {
 540                         DPRINTF("open base-addr of parport%d\n", i);
 541                         if (config_is_real_pport(i)) {
 542                                 ret = (*func) (path, mode);
 543                         } else {
 544                                 ret = (*func) ("/dev/null", mode);
 545                         }
 546
 547                         if (ret) {
 548                                 baseaddrfp = ret;
 549                                 baseaddrnum = i;
 550                         }
 551
 552                         return ret;
 553                 }
 554         }
 555
 556         ret = (*func) (path, mode);
 557
 558         if (!strcmp(path, "/proc/modules")) {
 559                 DPRINTF("opening /proc/modules\n");
 560 #ifdef NO_WINDRVR
 561                 modulesfp = ret;
 562                 modules_read = 0;
 563 #endif
 564         }
 565
 566         return ret;
 567 }
 568
 569 char *fgets(char *s, int size, FILE *stream) {
 570         static char* (*func) (char*, int, FILE*) = NULL;
 571         const char modules[][256] = {"windrvr6 1 0 - Live 0xdeadbeef\n", "parport_pc 1 0 - Live 0xdeadbeef\n"};
 572         char buf[256];
 573         char *ret = NULL;
 574
 575
 576         if (!func)
 577                 func = (char* (*) (char*, int, FILE*)) dlsym(RTLD_NEXT, "fgets");
 578
 579         if (modulesfp == stream) {
 580                 if (modules_read < sizeof(modules) / sizeof(modules[0])) {
 581                         strcpy(s, modules[modules_read]);
 582                         ret = s;
 583                         modules_read++;
 584                 }
 585         } else if (baseaddrfp == stream) {
 586                 snprintf(s, sizeof(buf), "%d\t%d\n",
 587                         (baseaddrnum) * 0x10,
 588                         ((baseaddrnum) * 0x10) + 0x400);
 589                 ret = s;
 590         } else {
 591                 ret = (*func)(s,size,stream);
 592         }
 593
 594         return ret;
 595 }
 596
 597 int fclose(FILE *fp) {
 598         static int (*func) (FILE*) = NULL;
 599
 600         if (!func)
 601                 func = (int (*) (FILE*)) dlsym(RTLD_NEXT, "fclose");
 602
 603         if (fp == modulesfp) {
 604                 modulesfp = NULL;
 605         }
 606
 607         if (fp == baseaddrfp) {
 608                 baseaddrfp = NULL;
 609         }
 610
 611         return (*func)(fp);
 612 }
 613
 614 int access(const char *pathname, int mode) {
 615         static int (*func) (const char*, int);
 616
 617         if (!func)
 618                 func = (int (*) (const char*, int)) dlsym(RTLD_NEXT, "access");
 619
 620         if (pathname && !strcmp(pathname, "/dev/windrvr6")) {
 621                 return 0;
 622         } else {
 623                 return (*func)(pathname, mode);
 624         }
 625 }
 626
 627 #if __WORDSIZE == 32
 628 int uname (struct utsname *__name) {
 629         static int (*func) (struct utsname*);
 630         int ret;
 631
 632         if (!func)
 633                 func = (int (*) (struct utsname*)) dlsym(RTLD_NEXT, "uname");
 634
 635         ret = (*func)(__name);
 636
 637         if (ret == 0 && (!strcmp(__name->machine, "x86_64"))) {
 638                 strcpy(__name->machine, "i686");
 639         }
 640
 641         return ret;
 642 }
 643 #endif