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 <syscall.h>
  45 #include <linux/personality.h>
  46 #include "usb-driver.h"
  47 #include "config.h"
  48 #include "xpcu.h"
  49
  50 static int (*ioctl_func) (int, int, void *) = NULL;
  51 static int *windrvrfds = NULL;
  52 static int windrvrfds_count = 0;
  53 static unsigned long ppbase = 0;
  54 static unsigned long ecpbase = 0;
  55 static struct parport_config *pport = NULL;
  56 static FILE *modulesfp = NULL;
  57 static FILE *baseaddrfp = NULL;
  58 static int baseaddrnum = 0;
  59 static int modules_read = 0;
  60
  61 #define NO_WINDRVR 1
  62
  63 void hexdump(unsigned char *buf, int len, char *prefix) {
  64         int i;
  65
  66         fprintf(stderr, "%s ", prefix);
  67         for(i=0; i<len; i++) {
  68                 fprintf(stderr,"%02x ", buf[i]);
  69                 if ((i % 16) == 15)
  70                         fprintf(stderr,"\n%s ", prefix);
  71         }
  72         fprintf(stderr,"\n");
  73 }
  74
  75
  76 static int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
  77         struct header_struct* wdheader = (struct header_struct*)wdioctl;
  78         struct version_struct *version;
  79         int ret = 0;
  80
  81         if (wdheader->magic != MAGIC) {
  82                 fprintf(stderr,"!!!ERROR: magic header does not match!!!\n");
  83                 return (*ioctl_func) (fd, request, wdioctl);
  84         }
  85
  86         switch(request & ~(0xc0000000)) {
  87                 case VERSION:
  88                         version = (struct version_struct*)(wdheader->data);
  89                         strcpy(version->version, "libusb-driver.so version: " USB_DRIVER_VERSION);
  90                         version->versionul = 802;
  91                         DPRINTF("VERSION\n");
  92                         break;
  93
  94                 case LICENSE:
  95                         DPRINTF("LICENSE\n");
  96                         break;
  97
  98                 case CARD_REGISTER_OLD:
  99                 case CARD_REGISTER:
 100                         DPRINTF("CARD_REGISTER\n");
 101                         {
 102                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 103
 104                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 105                                 cr->Card.dwItems,
 106                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 107                                 cr->Card.Item[0].I.IO.dwBytes,
 108                                 cr->Card.Item[0].I.IO.dwBar);
 109
 110                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 111                                 cr->Card.dwItems,
 112                                 (unsigned long)cr->Card.Item[1].I.IO.dwAddr,
 113                                 cr->Card.Item[1].I.IO.dwBytes,
 114                                 cr->Card.Item[1].I.IO.dwBar);
 115 #ifndef NO_WINDRVR
 116                                 ret = (*ioctl_func) (fd, request, wdioctl);
 117 #else
 118                                 cr->hCard = 0;
 119
 120                                 pport = config_get((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 121                                 if (!pport)
 122                                         break;
 123
 124                                 ret = pport->open((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 125
 126                                 ppbase = (unsigned long)cr->Card.Item[0].I.IO.dwAddr;
 127
 128                                 if (cr->Card.dwItems > 1 && cr->Card.Item[1].I.IO.dwAddr)
 129                                         ecpbase = (unsigned long)cr->Card.Item[1].I.IO.dwAddr;
 130
 131                                 if (ret >= 0) {
 132                                         cr->hCard = ret;
 133                                 } else {
 134                                         cr->hCard = 0;
 135                                 }
 136 #endif
 137                                 DPRINTF("<-hCard: %lu\n", cr->hCard);
 138                         }
 139                         break;
 140
 141                 case USB_TRANSFER:
 142                         DPRINTF("USB_TRANSFER\n");
 143                         {
 144                                 struct usb_transfer *ut = (struct usb_transfer*)(wdheader->data);
 145
 146 #ifdef DEBUG
 147                                 DPRINTF("-> unique: 0x%lx, pipe: %lu, read: %lu, options: %lx, size: %lu, timeout: %lx\n",
 148                                 ut->dwUniqueID, ut->dwPipeNum, ut->fRead,
 149                                 ut->dwOptions, ut->dwBufferSize, ut->dwTimeout);
 150                                 if (ut->dwPipeNum == 0) {
 151                                         DPRINTF("-> setup packet:");
 152                                         hexdump(ut->SetupPacket, 8, "");
 153                                 }
 154
 155                                 if (!ut->fRead && ut->dwBufferSize)
 156                                 {
 157                                         hexdump(ut->pBuffer, ut->dwBufferSize, "->");
 158                                 }
 159 #endif
 160
 161 #ifndef NO_WINDRVR
 162                                 ret = (*ioctl_func) (fd, request, wdioctl);
 163 #else
 164                                 ret = xpcu_transfer(ut);
 165 #endif
 166
 167 #ifdef DEBUG
 168                                 DPRINTF("Transferred: %lu (%s)\n",ut->dwBytesTransferred, (ut->fRead?"read":"write"));
 169                                 if (ut->fRead && ut->dwBytesTransferred)
 170                                 {
 171                                         hexdump(ut->pBuffer, ut->dwBytesTransferred, "<-");
 172                                 }
 173 #endif
 174                         }
 175                         break;
 176
 177                 case INT_ENABLE_OLD:
 178                 case INT_ENABLE:
 179                         DPRINTF("INT_ENABLE\n");
 180                         {
 181                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 182
 183                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 184                                 it->hInterrupt, it->dwOptions,
 185                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 186                                 it->dwLost, it->fStopped);
 187
 188 #ifndef NO_WINDRVR
 189                                 ret = (*ioctl_func) (fd, request, wdioctl);
 190 #else
 191                                 ret = xpcu_int_state(it, ENABLE_INTERRUPT);
 192 #endif
 193
 194                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 195                                 it->hInterrupt, it->dwOptions,
 196                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 197                                 it->dwLost, it->fStopped);
 198                         }
 199
 200                         break;
 201
 202                 case INT_DISABLE:
 203                         DPRINTF("INT_DISABLE\n");
 204                         {
 205                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 206
 207                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 208                                 it->hInterrupt, it->dwOptions,
 209                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 210                                 it->dwLost, it->fStopped);
 211 #ifndef NO_WINDRVR
 212                                 ret = (*ioctl_func) (fd, request, wdioctl);
 213 #else
 214                                 ret = xpcu_int_state(it, DISABLE_INTERRUPT);
 215 #endif
 216                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 217                                 it->hInterrupt, it->dwOptions,
 218                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 219                                 it->dwLost, it->fStopped);
 220                         }
 221                         break;
 222
 223                 case USB_SET_INTERFACE:
 224                         DPRINTF("USB_SET_INTERFACE\n");
 225                         {
 226                                 struct usb_set_interface *usi = (struct usb_set_interface*)(wdheader->data);
 227
 228                                 DPRINTF("-> unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 229                                 usi->dwUniqueID, usi->dwInterfaceNum,
 230                                 usi->dwAlternateSetting, usi->dwOptions);
 231 #ifndef NO_WINDRVR
 232                                 ret = (*ioctl_func) (fd, request, wdioctl);
 233 #else
 234                                 ret = xpcu_set_interface(usi);
 235 #endif
 236                                 DPRINTF("<- unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 237                                 usi->dwUniqueID, usi->dwInterfaceNum,
 238                                 usi->dwAlternateSetting, usi->dwOptions);
 239                         }
 240                         break;
 241
 242                 case USB_GET_DEVICE_DATA_OLD:
 243                 case USB_GET_DEVICE_DATA:
 244                         DPRINTF("USB_GET_DEVICE_DATA\n");
 245                         {
 246                                 struct usb_get_device_data *ugdd = (struct usb_get_device_data*)(wdheader->data);
 247
 248                                 DPRINTF("-> unique: 0x%lx, bytes: %lu, options: %lx\n",
 249                                 ugdd->dwUniqueID, ugdd->dwBytes,
 250                                 ugdd->dwOptions);
 251
 252                                 ret = xpcu_deviceinfo(ugdd);
 253
 254                         }
 255                         break;
 256
 257                 case EVENT_REGISTER_OLD:
 258                 case EVENT_REGISTER:
 259                         DPRINTF("EVENT_REGISTER\n");
 260                         {
 261                                 struct event *e = (struct event*)(wdheader->data);
 262 #ifdef DEBUG
 263                                 int i;
 264 #endif
 265
 266                                 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",
 267                                 e->handle, e->dwAction,
 268                                 e->dwStatus, e->dwEventId, e->dwCardType,
 269                                 e->hKernelPlugIn, e->dwOptions,
 270                                 e->u.Usb.deviceId.dwVendorId,
 271                                 e->u.Usb.deviceId.dwProductId,
 272                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 273                                 e->dwNumMatchTables);
 274
 275 #ifndef NO_WINDRVR
 276                                 ret = (*ioctl_func) (fd, request, wdioctl);
 277 #else
 278                                 ret = xpcu_find(e);
 279 #endif
 280
 281 #ifdef DEBUG
 282                                 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",
 283                                 e->handle, e->dwAction,
 284                                 e->dwStatus, e->dwEventId, e->dwCardType,
 285                                 e->hKernelPlugIn, e->dwOptions,
 286                                 e->u.Usb.deviceId.dwVendorId,
 287                                 e->u.Usb.deviceId.dwProductId,
 288                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 289                                 e->dwNumMatchTables);
 290
 291                                 for (i = 0; i < e->dwNumMatchTables; i++)
 292                                         DPRINTF("match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 293                                         e->matchTables[i].VendorId,
 294                                         e->matchTables[i].ProductId,
 295                                         e->matchTables[i].bDeviceClass,
 296                                         e->matchTables[i].bDeviceSubClass,
 297                                         e->matchTables[i].bInterfaceClass,
 298                                         e->matchTables[i].bInterfaceSubClass,
 299                                         e->matchTables[i].bInterfaceProtocol);
 300 #endif
 301                         }
 302                         break;
 303
 304                 case TRANSFER_OLD:
 305                 case TRANSFER:
 306                         DPRINTF("TRANSFER\n");
 307                         {
 308                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 309
 310 #ifndef NO_WINDRVR
 311                                 ret = (*ioctl_func) (fd, request, wdioctl);
 312 #else
 313                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, 1);
 314 #endif
 315                         }
 316                         break;
 317
 318                 case MULTI_TRANSFER_OLD:
 319                 case MULTI_TRANSFER:
 320                         DPRINTF("MULTI_TRANSFER\n");
 321                         {
 322                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 323                                 unsigned long num = wdheader->size/sizeof(WD_TRANSFER);
 324 #ifndef NO_WINDRVR
 325                                 ret = (*ioctl_func) (fd, request, wdioctl);
 326 #else
 327                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, num);
 328 #endif
 329                         }
 330                         break;
 331
 332                 case EVENT_UNREGISTER:
 333                         {
 334                                 struct event *e = (struct event*)(wdheader->data);
 335
 336                                 DPRINTF("EVENT_UNREGISTER\n");
 337 #ifndef NO_WINDRVR
 338                                 ret = (*ioctl_func) (fd, request, wdioctl);
 339 #else
 340                                 ret = xpcu_close(e);
 341 #endif
 342                         }
 343                         break;
 344
 345                 case INT_WAIT:
 346                         DPRINTF("INT_WAIT\n");
 347                         {
 348                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 349
 350                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 351                                 it->hInterrupt, it->dwOptions,
 352                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 353                                 it->dwLost, it->fStopped);
 354
 355 #ifndef NO_WINDRVR
 356                                 ret = (*ioctl_func) (fd, request, wdioctl);
 357 #else
 358                                 ret = xpcu_int_wait(it);
 359 #endif
 360
 361                                 DPRINTF("<- INT_WAIT_RETURN: Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 362                                 it->hInterrupt, it->dwOptions, it->dwCmds,
 363                                 it->fEnableOk, it->dwCounter, it->dwLost,
 364                                 it->fStopped);
 365                         }
 366                         break;
 367
 368                 case CARD_UNREGISTER:
 369                         DPRINTF("CARD_UNREGISTER\n");
 370                         {
 371                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 372
 373                                 DPRINTF("-> Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 374                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 375                                 cr->Card.Item[0].I.IO.dwBytes,
 376                                 cr->Card.Item[0].I.IO.dwBar);
 377
 378                                 DPRINTF("-> hCard: %lu\n", cr->hCard);
 379
 380 #ifndef NO_WINDRVR
 381                                 ret = (*ioctl_func) (fd, request, wdioctl);
 382 #else
 383                                 if (pport)
 384                                         pport->close(cr->hCard);
 385
 386                                 pport = NULL;
 387 #endif
 388                         }
 389                         break;
 390
 391                 case EVENT_PULL:
 392                         DPRINTF("EVENT_PULL\n");
 393                         {
 394                                 struct event *e = (struct event*)(wdheader->data);
 395 #ifdef DEBUG
 396                                 int i;
 397
 398                                 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",
 399                                 e->handle, e->dwAction, e->dwStatus,
 400                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 401                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 402                                 e->u.Usb.deviceId.dwProductId,
 403                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 404                                 e->dwNumMatchTables);
 405
 406                                 for (i = 0; i < e->dwNumMatchTables; i++)
 407                                         DPRINTF("-> match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 408                                         e->matchTables[i].VendorId,
 409                                         e->matchTables[i].ProductId,
 410                                         e->matchTables[i].bDeviceClass,
 411                                         e->matchTables[i].bDeviceSubClass,
 412                                         e->matchTables[i].bInterfaceClass,
 413                                         e->matchTables[i].bInterfaceSubClass,
 414                                         e->matchTables[i].bInterfaceProtocol);
 415 #endif
 416
 417 #ifndef NO_WINDRVR
 418                                 ret = (*ioctl_func) (fd, request, wdioctl);
 419 #else
 420                                 ret = xpcu_found(e);
 421 #endif
 422
 423 #ifdef DEBUG
 424                                 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",
 425                                 e->handle, e->dwAction, e->dwStatus,
 426                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 427                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 428                                 e->u.Usb.deviceId.dwProductId,
 429                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 430                                 e->dwNumMatchTables);
 431
 432                                 for (i = 0; i < e->dwNumMatchTables; i++)
 433                                         DPRINTF("<- match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 434                                         e->matchTables[i].VendorId,
 435                                         e->matchTables[i].ProductId,
 436                                         e->matchTables[i].bDeviceClass,
 437                                         e->matchTables[i].bDeviceSubClass,
 438                                         e->matchTables[i].bInterfaceClass,
 439                                         e->matchTables[i].bInterfaceSubClass,
 440                                         e->matchTables[i].bInterfaceProtocol);
 441 #endif
 442
 443                         }
 444                         break;
 445
 446                 default:
 447                         fprintf(stderr,"!!!Unsupported IOCTL: %x!!!\n", request);
 448 #ifndef NO_WINDRVR
 449                         ret = (*ioctl_func) (fd, request, wdioctl);
 450 #endif
 451                         break;
 452         }
 453
 454         return ret;
 455 }
 456
 457 int ioctl(int fd, unsigned long int request, ...) {
 458         va_list args;
 459         void *argp;
 460         int i;
 461
 462         if (!ioctl_func)
 463                 ioctl_func = (int (*) (int, int, void *)) dlsym (RTLD_NEXT, "ioctl");
 464
 465         va_start (args, request);
 466         argp = va_arg (args, void *);
 467         va_end (args);
 468
 469         for (i = 0; i < windrvrfds_count; i++) {
 470                 if (fd == windrvrfds[i])
 471                         return do_wdioctl(fd, request, argp);
 472         }
 473
 474         return (*ioctl_func) (fd, request, argp);
 475 }
 476
 477 int open (const char *pathname, int flags, ...) {
 478         static int (*func) (const char *, int, mode_t) = NULL;
 479         mode_t mode = 0;
 480         va_list args;
 481         int fd;
 482
 483         if (!func)
 484                 func = (int (*) (const char *, int, mode_t)) dlsym (RTLD_NEXT, "open");
 485
 486         if (flags & O_CREAT) {
 487                 va_start(args, flags);
 488                 mode = va_arg(args, mode_t);
 489                 va_end(args);
 490         }
 491
 492         if (!strcmp (pathname, "/dev/windrvr6")) {
 493                 DPRINTF("opening windrvr6 (%d)\n", windrvrfds_count);
 494                 windrvrfds = realloc(windrvrfds, sizeof(int) * (++windrvrfds_count));
 495                 if (!windrvrfds)
 496                         return -ENOMEM;
 497
 498 #ifdef NO_WINDRVR
 499                 windrvrfds[windrvrfds_count-1] = fd = (*func) ("/dev/null", flags, mode);
 500 #else
 501                 windrvrfds[windrvrfds_count-1] = fd = (*func) (pathname, flags, mode);
 502 #endif
 503
 504                 return fd;
 505         }
 506
 507         return (*func) (pathname, flags, mode);
 508 }
 509
 510 int close(int fd) {
 511         static int (*func) (int) = NULL;
 512         int i;
 513
 514         if (!func)
 515                 func = (int (*) (int)) dlsym(RTLD_NEXT, "close");
 516
 517         for (i = 0; i < windrvrfds_count; i++) {
 518                 if (fd == windrvrfds[i] && windrvrfds[i] >= 0) {
 519                         int remaining = windrvrfds_count - (i + 1);
 520                         DPRINTF("close windrvr6 (%d)\n", i);
 521                         if (remaining)
 522                                 memmove(&(windrvrfds[i]), &(windrvrfds[i+1]), remaining * sizeof(int));
 523                         windrvrfds = realloc(windrvrfds, sizeof(int) * --windrvrfds_count);
 524                         if (!windrvrfds_count)
 525                                 windrvrfds = NULL;
 526                         break;
 527                 }
 528         }
 529
 530         return (*func) (fd);
 531 }
 532
 533 FILE *fopen(const char *path, const char *mode) {
 534         FILE *ret;
 535         static FILE* (*func) (const char*, const char*) = NULL;
 536         char buf[256];
 537         int i;
 538
 539         if (!func)
 540                 func = (FILE* (*) (const char*, const char*)) dlsym(RTLD_NEXT, "fopen");
 541
 542         for (i = 0; i < 4; i++) {
 543                 snprintf(buf, sizeof(buf), "/proc/sys/dev/parport/parport%d/base-addr", i);
 544                 if (!strcmp(path, buf)) {
 545                         DPRINTF("open base-addr of parport%d\n", i);
 546                         if (config_is_real_pport(i)) {
 547                                 ret = (*func) (path, mode);
 548                         } else {
 549                                 ret = (*func) ("/dev/null", mode);
 550                         }
 551
 552                         if (ret) {
 553                                 baseaddrfp = ret;
 554                                 baseaddrnum = i;
 555                         }
 556
 557                         return ret;
 558                 }
 559         }
 560
 561         ret = (*func) (path, mode);
 562
 563         if (!strcmp(path, "/proc/modules")) {
 564                 DPRINTF("opening /proc/modules\n");
 565                 if (!ret && errno == ENOENT) {
 566                         /* Hmm.. there appears to be no /proc/modules file
 567                          * fake it then */
 568                         ret = (*func)("/dev/null", mode);
 569                         DPRINTF("No /proc/modules -- faking\n");
 570                 }
 571 #ifdef NO_WINDRVR
 572                 modulesfp = ret;
 573                 modules_read = 0;
 574 #endif
 575         }
 576
 577         return ret;
 578 }
 579
 580 char *fgets(char *s, int size, FILE *stream) {
 581         static char* (*func) (char*, int, FILE*) = NULL;
 582         const char modules[][256] = {"windrvr6 1 0 - Live 0xdeadbeef\n", "parport_pc 1 0 - Live 0xdeadbeef\n"};
 583         char buf[256];
 584         char *ret = NULL;
 585
 586
 587         if (!func)
 588                 func = (char* (*) (char*, int, FILE*)) dlsym(RTLD_NEXT, "fgets");
 589
 590         if (modulesfp == stream) {
 591                 if (modules_read < sizeof(modules) / sizeof(modules[0])) {
 592                         strcpy(s, modules[modules_read]);
 593                         ret = s;
 594                         modules_read++;
 595                 }
 596         } else if (baseaddrfp == stream) {
 597                 snprintf(s, sizeof(buf), "%d\t%d\n",
 598                         (baseaddrnum) * 0x10,
 599                         ((baseaddrnum) * 0x10) + 0x400);
 600                 ret = s;
 601         } else {
 602                 ret = (*func)(s,size,stream);
 603         }
 604
 605         return ret;
 606 }
 607
 608 int fclose(FILE *fp) {
 609         static int (*func) (FILE*) = NULL;
 610
 611         if (!func)
 612                 func = (int (*) (FILE*)) dlsym(RTLD_NEXT, "fclose");
 613
 614         if (fp == modulesfp) {
 615                 modulesfp = NULL;
 616         }
 617
 618         if (fp == baseaddrfp) {
 619                 baseaddrfp = NULL;
 620         }
 621
 622         return (*func)(fp);
 623 }
 624
 625 int access(const char *pathname, int mode) {
 626         static int (*func) (const char*, int);
 627
 628         if (!func)
 629                 func = (int (*) (const char*, int)) dlsym(RTLD_NEXT, "access");
 630
 631         if (pathname && !strcmp(pathname, "/dev/windrvr6")) {
 632                 return 0;
 633         } else {
 634                 return (*func)(pathname, mode);
 635         }
 636 }
 637
 638 #if 0
 639 /* USB cable sharing needs to overload semop, TODO! */
 640 int semop (int __semid, struct sembuf *__sops, size_t __nsops) {
 641         static int (*func) (int, struct sembuf*, size_t) = NULL;
 642         int i;
 643
 644         if (!func)
 645                 func = (int (*) (int, struct sembuf*, size_t)) dlsym(RTLD_NEXT, "semop");
 646
 647         fprintf(stderr,"semop: semid: 0x%X, elements: %d\n", __semid, __nsops);
 648         for (i = 0; i < __nsops; i++) {
 649                 fprintf(stderr, " num: %u, op: %d, flg: %d\n", __sops[i].sem_num, __sops[i].sem_op, __sops[i].sem_flg);
 650                 if (__sops[i].sem_op < 0) {
 651                         fprintf(stderr, "SEMAPHORE LOCK\n");
 652                 } else {
 653                         fprintf(stderr, "SEMAPHORE UNLOCK\n");
 654                 }
 655         }
 656
 657         return (*func)(__semid, __sops, __nsops);
 658 }
 659 #endif
 660
 661 /*
 662  * Ugly hack for ISE 12. They don't seem to open /proc/modules with
 663  * open() anymore...
 664  * echo '_Z14isModuleLoadedPci' | c++filt
 665  */
 666 long int _Z14isModuleLoadedPci(char *module_name, int i) {
 667         DPRINTF("_Z14isModuleLoadedPci: Checking for module %s (%d)\n", module_name, i);
 668
 669         return 1;
 670 }
 671
 672 static void __attribute__ ((constructor)) libusbdriver_init(void) {
 673         #if __WORDSIZE == 32
 674         struct utsname un;
 675         int ret;
 676
 677         ret = uname(&un);
 678
 679         if (ret == 0 && (!strcmp(un.machine, "x86_64"))) {
 680                 DPRINTF("setting 32bit personality\n");
 681                 (long)syscall(SYS_personality, PER_LINUX32);
 682         }
 683         #endif
 684 }