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 <sys/ipc.h>
  43 #include <sys/sem.h>
  44 #include "usb-driver.h"
  45 #include "config.h"
  46 #include "xpcu.h"
  47
  48 static int (*ioctl_func) (int, int, void *) = NULL;
  49 static int *windrvrfds = NULL;
  50 static int windrvrfds_count = 0;
  51 static unsigned long ppbase = 0;
  52 static unsigned long ecpbase = 0;
  53 static struct parport_config *pport = NULL;
  54 static FILE *modulesfp = NULL;
  55 static FILE *baseaddrfp = NULL;
  56 static int baseaddrnum = 0;
  57 static int modules_read = 0;
  58
  59 #define NO_WINDRVR 1
  60
  61 void hexdump(unsigned char *buf, int len, char *prefix) {
  62         int i;
  63
  64         fprintf(stderr, "%s ", prefix);
  65         for(i=0; i<len; i++) {
  66                 fprintf(stderr,"%02x ", buf[i]);
  67                 if ((i % 16) == 15)
  68                         fprintf(stderr,"\n%s ", prefix);
  69         }
  70         fprintf(stderr,"\n");
  71 }
  72
  73
  74 static int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
  75         struct header_struct* wdheader = (struct header_struct*)wdioctl;
  76         struct version_struct *version;
  77         int ret = 0;
  78
  79         if (wdheader->magic != MAGIC) {
  80                 fprintf(stderr,"!!!ERROR: magic header does not match!!!\n");
  81                 return (*ioctl_func) (fd, request, wdioctl);
  82         }
  83
  84         switch(request & ~(0xc0000000)) {
  85                 case VERSION:
  86                         version = (struct version_struct*)(wdheader->data);
  87                         strcpy(version->version, "libusb-driver.so version: " USB_DRIVER_VERSION);
  88                         version->versionul = 802;
  89                         DPRINTF("VERSION\n");
  90                         break;
  91
  92                 case LICENSE:
  93                         DPRINTF("LICENSE\n");
  94                         break;
  95
  96                 case CARD_REGISTER_OLD:
  97                 case CARD_REGISTER:
  98                         DPRINTF("CARD_REGISTER\n");
  99                         {
 100                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 101
 102                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 103                                 cr->Card.dwItems,
 104                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 105                                 cr->Card.Item[0].I.IO.dwBytes,
 106                                 cr->Card.Item[0].I.IO.dwBar);
 107
 108                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 109                                 cr->Card.dwItems,
 110                                 (unsigned long)cr->Card.Item[1].I.IO.dwAddr,
 111                                 cr->Card.Item[1].I.IO.dwBytes,
 112                                 cr->Card.Item[1].I.IO.dwBar);
 113 #ifndef NO_WINDRVR
 114                                 ret = (*ioctl_func) (fd, request, wdioctl);
 115 #else
 116
 117                                 pport = config_get((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 118                                 if (!pport)
 119                                         break;
 120
 121                                 ret = pport->open((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 122
 123                                 ppbase = (unsigned long)cr->Card.Item[0].I.IO.dwAddr;
 124
 125                                 if (cr->Card.dwItems > 1 && cr->Card.Item[1].I.IO.dwAddr)
 126                                         ecpbase = (unsigned long)cr->Card.Item[1].I.IO.dwAddr;
 127
 128                                 if (ret >= 0) {
 129                                         cr->hCard = ret;
 130                                 } else {
 131                                         cr->hCard = 0;
 132                                 }
 133 #endif
 134                                 DPRINTF("<-hCard: %lu\n", cr->hCard);
 135                         }
 136                         break;
 137
 138                 case USB_TRANSFER:
 139                         DPRINTF("USB_TRANSFER\n");
 140                         {
 141                                 struct usb_transfer *ut = (struct usb_transfer*)(wdheader->data);
 142
 143 #ifdef DEBUG
 144                                 DPRINTF("-> unique: 0x%lx, pipe: %lu, read: %lu, options: %lx, size: %lu, timeout: %lx\n",
 145                                 ut->dwUniqueID, ut->dwPipeNum, ut->fRead,
 146                                 ut->dwOptions, ut->dwBufferSize, ut->dwTimeout);
 147                                 if (ut->dwPipeNum == 0) {
 148                                         DPRINTF("-> setup packet:");
 149                                         hexdump(ut->SetupPacket, 8, "");
 150                                 }
 151
 152                                 if (!ut->fRead && ut->dwBufferSize)
 153                                 {
 154                                         hexdump(ut->pBuffer, ut->dwBufferSize, "->");
 155                                 }
 156 #endif
 157
 158 #ifndef NO_WINDRVR
 159                                 ret = (*ioctl_func) (fd, request, wdioctl);
 160 #else
 161                                 ret = xpcu_transfer(ut);
 162 #endif
 163
 164 #ifdef DEBUG
 165                                 DPRINTF("Transferred: %lu (%s)\n",ut->dwBytesTransferred, (ut->fRead?"read":"write"));
 166                                 if (ut->fRead && ut->dwBytesTransferred)
 167                                 {
 168                                         hexdump(ut->pBuffer, ut->dwBytesTransferred, "<-");
 169                                 }
 170 #endif
 171                         }
 172                         break;
 173
 174                 case INT_ENABLE_OLD:
 175                 case INT_ENABLE:
 176                         DPRINTF("INT_ENABLE\n");
 177                         {
 178                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 179
 180                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 181                                 it->hInterrupt, it->dwOptions,
 182                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 183                                 it->dwLost, it->fStopped);
 184
 185 #ifndef NO_WINDRVR
 186                                 ret = (*ioctl_func) (fd, request, wdioctl);
 187 #else
 188                                 ret = xpcu_int_state(it, ENABLE_INTERRUPT);
 189 #endif
 190
 191                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 192                                 it->hInterrupt, it->dwOptions,
 193                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 194                                 it->dwLost, it->fStopped);
 195                         }
 196
 197                         break;
 198
 199                 case INT_DISABLE:
 200                         DPRINTF("INT_DISABLE\n");
 201                         {
 202                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 203
 204                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 205                                 it->hInterrupt, it->dwOptions,
 206                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 207                                 it->dwLost, it->fStopped);
 208 #ifndef NO_WINDRVR
 209                                 ret = (*ioctl_func) (fd, request, wdioctl);
 210 #else
 211                                 ret = xpcu_int_state(it, DISABLE_INTERRUPT);
 212 #endif
 213                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 214                                 it->hInterrupt, it->dwOptions,
 215                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 216                                 it->dwLost, it->fStopped);
 217                         }
 218                         break;
 219
 220                 case USB_SET_INTERFACE:
 221                         DPRINTF("USB_SET_INTERFACE\n");
 222                         {
 223                                 struct usb_set_interface *usi = (struct usb_set_interface*)(wdheader->data);
 224
 225                                 DPRINTF("-> unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 226                                 usi->dwUniqueID, usi->dwInterfaceNum,
 227                                 usi->dwAlternateSetting, usi->dwOptions);
 228 #ifndef NO_WINDRVR
 229                                 ret = (*ioctl_func) (fd, request, wdioctl);
 230 #else
 231                                 ret = xpcu_set_interface(usi);
 232 #endif
 233                                 DPRINTF("<- unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 234                                 usi->dwUniqueID, usi->dwInterfaceNum,
 235                                 usi->dwAlternateSetting, usi->dwOptions);
 236                         }
 237                         break;
 238
 239                 case USB_GET_DEVICE_DATA_OLD:
 240                 case USB_GET_DEVICE_DATA:
 241                         DPRINTF("USB_GET_DEVICE_DATA\n");
 242                         {
 243                                 struct usb_get_device_data *ugdd = (struct usb_get_device_data*)(wdheader->data);
 244
 245                                 DPRINTF("-> unique: 0x%lx, bytes: %lu, options: %lx\n",
 246                                 ugdd->dwUniqueID, ugdd->dwBytes,
 247                                 ugdd->dwOptions);
 248
 249                                 ret = xpcu_deviceinfo(ugdd);
 250
 251                         }
 252                         break;
 253
 254                 case EVENT_REGISTER_OLD:
 255                 case EVENT_REGISTER:
 256                         DPRINTF("EVENT_REGISTER\n");
 257                         {
 258                                 struct event *e = (struct event*)(wdheader->data);
 259 #ifdef DEBUG
 260                                 int i;
 261 #endif
 262
 263                                 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",
 264                                 e->handle, e->dwAction,
 265                                 e->dwStatus, e->dwEventId, e->dwCardType,
 266                                 e->hKernelPlugIn, e->dwOptions,
 267                                 e->u.Usb.deviceId.dwVendorId,
 268                                 e->u.Usb.deviceId.dwProductId,
 269                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 270                                 e->dwNumMatchTables);
 271
 272 #ifndef NO_WINDRVR
 273                                 ret = (*ioctl_func) (fd, request, wdioctl);
 274 #else
 275                                 ret = xpcu_find(e);
 276 #endif
 277
 278 #ifdef DEBUG
 279                                 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",
 280                                 e->handle, e->dwAction,
 281                                 e->dwStatus, e->dwEventId, e->dwCardType,
 282                                 e->hKernelPlugIn, e->dwOptions,
 283                                 e->u.Usb.deviceId.dwVendorId,
 284                                 e->u.Usb.deviceId.dwProductId,
 285                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 286                                 e->dwNumMatchTables);
 287
 288                                 for (i = 0; i < e->dwNumMatchTables; i++)
 289                                         DPRINTF("match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 290                                         e->matchTables[i].VendorId,
 291                                         e->matchTables[i].ProductId,
 292                                         e->matchTables[i].bDeviceClass,
 293                                         e->matchTables[i].bDeviceSubClass,
 294                                         e->matchTables[i].bInterfaceClass,
 295                                         e->matchTables[i].bInterfaceSubClass,
 296                                         e->matchTables[i].bInterfaceProtocol);
 297 #endif
 298                         }
 299                         break;
 300
 301                 case TRANSFER_OLD:
 302                 case TRANSFER:
 303                         DPRINTF("TRANSFER\n");
 304                         {
 305                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 306
 307 #ifndef NO_WINDRVR
 308                                 ret = (*ioctl_func) (fd, request, wdioctl);
 309 #else
 310                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, 1);
 311 #endif
 312                         }
 313                         break;
 314
 315                 case MULTI_TRANSFER_OLD:
 316                 case MULTI_TRANSFER:
 317                         DPRINTF("MULTI_TRANSFER\n");
 318                         {
 319                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 320                                 unsigned long num = wdheader->size/sizeof(WD_TRANSFER);
 321 #ifndef NO_WINDRVR
 322                                 ret = (*ioctl_func) (fd, request, wdioctl);
 323 #else
 324                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, num);
 325 #endif
 326                         }
 327                         break;
 328
 329                 case EVENT_UNREGISTER:
 330                         {
 331                                 struct event *e = (struct event*)(wdheader->data);
 332
 333                                 DPRINTF("EVENT_UNREGISTER\n");
 334 #ifndef NO_WINDRVR
 335                                 ret = (*ioctl_func) (fd, request, wdioctl);
 336 #else
 337                                 ret = xpcu_close(e);
 338 #endif
 339                         }
 340                         break;
 341
 342                 case INT_WAIT:
 343                         DPRINTF("INT_WAIT\n");
 344                         {
 345                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 346
 347                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 348                                 it->hInterrupt, it->dwOptions,
 349                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 350                                 it->dwLost, it->fStopped);
 351
 352 #ifndef NO_WINDRVR
 353                                 ret = (*ioctl_func) (fd, request, wdioctl);
 354 #else
 355                                 ret = xpcu_int_wait(it);
 356 #endif
 357
 358                                 DPRINTF("<- INT_WAIT_RETURN: Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 359                                 it->hInterrupt, it->dwOptions, it->dwCmds,
 360                                 it->fEnableOk, it->dwCounter, it->dwLost,
 361                                 it->fStopped);
 362                         }
 363                         break;
 364
 365                 case CARD_UNREGISTER:
 366                         DPRINTF("CARD_UNREGISTER\n");
 367                         {
 368                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 369
 370                                 DPRINTF("-> Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 371                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 372                                 cr->Card.Item[0].I.IO.dwBytes,
 373                                 cr->Card.Item[0].I.IO.dwBar);
 374
 375                                 DPRINTF("-> hCard: %lu\n", cr->hCard);
 376
 377 #ifndef NO_WINDRVR
 378                                 ret = (*ioctl_func) (fd, request, wdioctl);
 379 #else
 380                                 if (pport)
 381                                         pport->close(cr->hCard);
 382
 383                                 pport = NULL;
 384 #endif
 385                         }
 386                         break;
 387
 388                 case EVENT_PULL:
 389                         DPRINTF("EVENT_PULL\n");
 390                         {
 391                                 struct event *e = (struct event*)(wdheader->data);
 392 #ifdef DEBUG
 393                                 int i;
 394
 395                                 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",
 396                                 e->handle, e->dwAction, e->dwStatus,
 397                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 398                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 399                                 e->u.Usb.deviceId.dwProductId,
 400                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 401                                 e->dwNumMatchTables);
 402
 403                                 for (i = 0; i < e->dwNumMatchTables; i++)
 404                                         DPRINTF("-> match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 405                                         e->matchTables[i].VendorId,
 406                                         e->matchTables[i].ProductId,
 407                                         e->matchTables[i].bDeviceClass,
 408                                         e->matchTables[i].bDeviceSubClass,
 409                                         e->matchTables[i].bInterfaceClass,
 410                                         e->matchTables[i].bInterfaceSubClass,
 411                                         e->matchTables[i].bInterfaceProtocol);
 412 #endif
 413
 414 #ifndef NO_WINDRVR
 415                                 ret = (*ioctl_func) (fd, request, wdioctl);
 416 #else
 417                                 ret = xpcu_found(e);
 418 #endif
 419
 420 #ifdef DEBUG
 421                                 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",
 422                                 e->handle, e->dwAction, e->dwStatus,
 423                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 424                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 425                                 e->u.Usb.deviceId.dwProductId,
 426                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 427                                 e->dwNumMatchTables);
 428
 429                                 for (i = 0; i < e->dwNumMatchTables; i++)
 430                                         DPRINTF("<- match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 431                                         e->matchTables[i].VendorId,
 432                                         e->matchTables[i].ProductId,
 433                                         e->matchTables[i].bDeviceClass,
 434                                         e->matchTables[i].bDeviceSubClass,
 435                                         e->matchTables[i].bInterfaceClass,
 436                                         e->matchTables[i].bInterfaceSubClass,
 437                                         e->matchTables[i].bInterfaceProtocol);
 438 #endif
 439
 440                         }
 441                         break;
 442
 443                 default:
 444                         fprintf(stderr,"!!!Unsupported IOCTL: %x!!!\n", request);
 445 #ifndef NO_WINDRVR
 446                         ret = (*ioctl_func) (fd, request, wdioctl);
 447 #endif
 448                         break;
 449         }
 450
 451         return ret;
 452 }
 453
 454 int ioctl(int fd, unsigned long int request, ...) {
 455         va_list args;
 456         void *argp;
 457         int i;
 458
 459         if (!ioctl_func)
 460                 ioctl_func = (int (*) (int, int, void *)) dlsym (RTLD_NEXT, "ioctl");
 461
 462         va_start (args, request);
 463         argp = va_arg (args, void *);
 464         va_end (args);
 465
 466         for (i = 0; i < windrvrfds_count; i++) {
 467                 if (fd == windrvrfds[i])
 468                         return do_wdioctl(fd, request, argp);
 469         }
 470
 471         return (*ioctl_func) (fd, request, argp);
 472 }
 473
 474 int open (const char *pathname, int flags, ...) {
 475         static int (*func) (const char *, int, mode_t) = NULL;
 476         mode_t mode = 0;
 477         va_list args;
 478         int fd;
 479
 480         if (!func)
 481                 func = (int (*) (const char *, int, mode_t)) dlsym (RTLD_NEXT, "open");
 482
 483         if (flags & O_CREAT) {
 484                 va_start(args, flags);
 485                 mode = va_arg(args, mode_t);
 486                 va_end(args);
 487         }
 488
 489         if (!strcmp (pathname, "/dev/windrvr6")) {
 490                 DPRINTF("opening windrvr6 (%d)\n", windrvrfds_count);
 491                 windrvrfds = realloc(windrvrfds, sizeof(int) * (++windrvrfds_count));
 492                 if (!windrvrfds)
 493                         return -ENOMEM;
 494
 495 #ifdef NO_WINDRVR
 496                 windrvrfds[windrvrfds_count-1] = fd = (*func) ("/dev/null", flags, mode);
 497 #else
 498                 windrvrfds[windrvrfds_count-1] = fd = (*func) (pathname, flags, mode);
 499 #endif
 500
 501                 return fd;
 502         }
 503
 504         return (*func) (pathname, flags, mode);
 505 }
 506
 507 int close(int fd) {
 508         static int (*func) (int) = NULL;
 509         int i;
 510
 511         if (!func)
 512                 func = (int (*) (int)) dlsym(RTLD_NEXT, "close");
 513
 514         for (i = 0; i < windrvrfds_count; i++) {
 515                 if (fd == windrvrfds[i] && windrvrfds[i] >= 0) {
 516                         int remaining = windrvrfds_count - (i + 1);
 517                         DPRINTF("close windrvr6 (%d)\n", i);
 518                         if (remaining)
 519                                 memmove(&(windrvrfds[i]), &(windrvrfds[i+1]), remaining * sizeof(int));
 520                         windrvrfds = realloc(windrvrfds, sizeof(int) * --windrvrfds_count);
 521                         if (!windrvrfds_count)
 522                                 windrvrfds = NULL;
 523                         break;
 524                 }
 525         }
 526
 527         return (*func) (fd);
 528 }
 529
 530 FILE *fopen(const char *path, const char *mode) {
 531         FILE *ret;
 532         static FILE* (*func) (const char*, const char*) = NULL;
 533         char buf[256];
 534         int i;
 535
 536         if (!func)
 537                 func = (FILE* (*) (const char*, const char*)) dlsym(RTLD_NEXT, "fopen");
 538
 539         for (i = 0; i < 4; i++) {
 540                 snprintf(buf, sizeof(buf), "/proc/sys/dev/parport/parport%d/base-addr", i);
 541                 if (!strcmp(path, buf)) {
 542                         DPRINTF("open base-addr of parport%d\n", i);
 543                         if (config_is_real_pport(i)) {
 544                                 ret = (*func) (path, mode);
 545                         } else {
 546                                 ret = (*func) ("/dev/null", mode);
 547                         }
 548
 549                         if (ret) {
 550                                 baseaddrfp = ret;
 551                                 baseaddrnum = i;
 552                         }
 553
 554                         return ret;
 555                 }
 556         }
 557
 558         ret = (*func) (path, mode);
 559
 560         if (!strcmp(path, "/proc/modules")) {
 561                 DPRINTF("opening /proc/modules\n");
 562                 if (!ret && errno == ENOENT) {
 563                         /* Hmm.. there appears to be no /proc/modules file
 564                          * fake it then */
 565                         ret = (*func)("/dev/null", mode);
 566                         DPRINTF("No /proc/modules -- faking\n");
 567                 }
 568 #ifdef NO_WINDRVR
 569                 modulesfp = ret;
 570                 modules_read = 0;
 571 #endif
 572         }
 573
 574         return ret;
 575 }
 576
 577 char *fgets(char *s, int size, FILE *stream) {
 578         static char* (*func) (char*, int, FILE*) = NULL;
 579         const char modules[][256] = {"windrvr6 1 0 - Live 0xdeadbeef\n", "parport_pc 1 0 - Live 0xdeadbeef\n"};
 580         char buf[256];
 581         char *ret = NULL;
 582
 583
 584         if (!func)
 585                 func = (char* (*) (char*, int, FILE*)) dlsym(RTLD_NEXT, "fgets");
 586
 587         if (modulesfp == stream) {
 588                 if (modules_read < sizeof(modules) / sizeof(modules[0])) {
 589                         strcpy(s, modules[modules_read]);
 590                         ret = s;
 591                         modules_read++;
 592                 }
 593         } else if (baseaddrfp == stream) {
 594                 snprintf(s, sizeof(buf), "%d\t%d\n",
 595                         (baseaddrnum) * 0x10,
 596                         ((baseaddrnum) * 0x10) + 0x400);
 597                 ret = s;
 598         } else {
 599                 ret = (*func)(s,size,stream);
 600         }
 601
 602         return ret;
 603 }
 604
 605 int fclose(FILE *fp) {
 606         static int (*func) (FILE*) = NULL;
 607
 608         if (!func)
 609                 func = (int (*) (FILE*)) dlsym(RTLD_NEXT, "fclose");
 610
 611         if (fp == modulesfp) {
 612                 modulesfp = NULL;
 613         }
 614
 615         if (fp == baseaddrfp) {
 616                 baseaddrfp = NULL;
 617         }
 618
 619         return (*func)(fp);
 620 }
 621
 622 int access(const char *pathname, int mode) {
 623         static int (*func) (const char*, int);
 624
 625         if (!func)
 626                 func = (int (*) (const char*, int)) dlsym(RTLD_NEXT, "access");
 627
 628         if (pathname && !strcmp(pathname, "/dev/windrvr6")) {
 629                 return 0;
 630         } else {
 631                 return (*func)(pathname, mode);
 632         }
 633 }
 634
 635 #if 0
 636 /* USB cable sharing needs to overload semop, TODO! */
 637 int semop (int __semid, struct sembuf *__sops, size_t __nsops) {
 638         static int (*func) (int, struct sembuf*, size_t) = NULL;
 639         int i;
 640
 641         if (!func)
 642                 func = (int (*) (int, struct sembuf*, size_t)) dlsym(RTLD_NEXT, "semop");
 643
 644         fprintf(stderr,"semop: semid: 0x%X, elements: %d\n", __semid, __nsops);
 645         for (i = 0; i < __nsops; i++) {
 646                 fprintf(stderr, " num: %u, op: %d, flg: %d\n", __sops[i].sem_num, __sops[i].sem_op, __sops[i].sem_flg);
 647                 if (__sops[i].sem_op < 0) {
 648                         fprintf(stderr, "SEMAPHORE LOCK\n");
 649                 } else {
 650                         fprintf(stderr, "SEMAPHORE UNLOCK\n");
 651                 }
 652         }
 653
 654         return (*func)(__semid, __sops, __nsops);
 655 }
 656 #endif
 657
 658 #if __WORDSIZE == 32
 659 int uname (struct utsname *__name) {
 660         static int (*func) (struct utsname*);
 661         int ret;
 662
 663         if (!func)
 664                 func = (int (*) (struct utsname*)) dlsym(RTLD_NEXT, "uname");
 665
 666         ret = (*func)(__name);
 667
 668         if (ret == 0 && (!strcmp(__name->machine, "x86_64"))) {
 669                 strcpy(__name->machine, "i686");
 670         }
 671
 672         return ret;
 673 }
 674 #endif
 675
 676 /* Ugly hack for ISE 12. They don't seem to open /proc/modules with
 677  * open() anymore... */
 678 int _Z14isModuleLoadedPci(void) {
 679         DPRINTF("Faking _Z14isModuleLoadedPci\n");
 680
 681         return 1;
 682 }