git.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 <sys/mman.h>
  45 #include <syscall.h>
  46 #include <linux/personality.h>
  47 #include "usb-driver.h"
  48 #include "config.h"
  49 #include "xpcu.h"
  50
  51 static int (*ioctl_func) (int, int, void *) = NULL;
  52 static int *windrvrfds = NULL;
  53 static int windrvrfds_count = 0;
  54 static unsigned long ppbase = 0;
  55 static unsigned long ecpbase = 0;
  56 static struct parport_config *pport = NULL;
  57 static FILE *modulesfp = NULL;
  58 static FILE *baseaddrfp = NULL;
  59 static int baseaddrnum = 0;
  60 static int modules_read = 0;
  61
  62 #define NO_WINDRVR 1
  63
  64 void hexdump(unsigned char *buf, int len, char *prefix) {
  65         int i = 0;
  66
  67         fprintf(stderr, "%s %03x: ", prefix, i);
  68         for(i = 0; i<len; i++) {
  69                 fprintf(stderr,"%02x ", buf[i]);
  70                 if ((i % 16) == 7)
  71                         fprintf(stderr," ");
  72                 if (((i % 16) == 15) && ((i+1) < len))
  73                         fprintf(stderr,"\n%s %03x: ", prefix, i+1);
  74         }
  75         fprintf(stderr,"\n");
  76 }
  77
  78
  79 static int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
  80         struct header_struct* wdheader = (struct header_struct*)wdioctl;
  81         struct version_struct *version;
  82         int ret = 0;
  83
  84         if (wdheader->magic != MAGIC) {
  85                 fprintf(stderr,"!!!ERROR: magic header does not match!!!\n");
  86                 return (*ioctl_func) (fd, request, wdioctl);
  87         }
  88
  89         switch(request & ~(0xc0000000)) {
  90                 case VERSION:
  91                         version = (struct version_struct*)(wdheader->data);
  92                         strcpy(version->version, "libusb-driver.so version: " USB_DRIVER_VERSION);
  93                         version->versionul = 802;
  94                         DPRINTF("VERSION\n");
  95                         break;
  96
  97                 case LICENSE:
  98                         DPRINTF("LICENSE\n");
  99                         break;
 100
 101                 case CARD_REGISTER_OLD:
 102                 case CARD_REGISTER:
 103                         DPRINTF("CARD_REGISTER\n");
 104                         {
 105                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 106
 107                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 108                                 cr->Card.dwItems,
 109                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 110                                 cr->Card.Item[0].I.IO.dwBytes,
 111                                 cr->Card.Item[0].I.IO.dwBar);
 112
 113                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 114                                 cr->Card.dwItems,
 115                                 (unsigned long)cr->Card.Item[1].I.IO.dwAddr,
 116                                 cr->Card.Item[1].I.IO.dwBytes,
 117                                 cr->Card.Item[1].I.IO.dwBar);
 118 #ifndef NO_WINDRVR
 119                                 ret = (*ioctl_func) (fd, request, wdioctl);
 120 #else
 121                                 cr->hCard = 0;
 122
 123                                 pport = config_get((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 124                                 if (!pport)
 125                                         break;
 126
 127                                 ret = pport->open((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 128
 129                                 ppbase = (unsigned long)cr->Card.Item[0].I.IO.dwAddr;
 130
 131                                 if (cr->Card.dwItems > 1 && cr->Card.Item[1].I.IO.dwAddr)
 132                                         ecpbase = (unsigned long)cr->Card.Item[1].I.IO.dwAddr;
 133
 134                                 if (ret >= 0) {
 135                                         cr->hCard = ret;
 136                                 } else {
 137                                         cr->hCard = 0;
 138                                 }
 139 #endif
 140                                 DPRINTF("<-hCard: %lu\n", cr->hCard);
 141                         }
 142                         break;
 143
 144                 case USB_TRANSFER:
 145                         DPRINTF("USB_TRANSFER\n");
 146                         {
 147                                 struct usb_transfer *ut = (struct usb_transfer*)(wdheader->data);
 148
 149 #ifdef DEBUG
 150                                 DPRINTF("-> unique: 0x%lx, pipe: %lu, read: %lu, options: %lx, size: %lu, timeout: %lx\n",
 151                                 ut->dwUniqueID, ut->dwPipeNum, ut->fRead,
 152                                 ut->dwOptions, ut->dwBufferSize, ut->dwTimeout);
 153                                 if (ut->dwPipeNum == 0) {
 154                                         DPRINTF("-> setup packet:");
 155                                         hexdump(ut->SetupPacket, 8, "");
 156                                 }
 157
 158                                 if (!ut->fRead && ut->dwBufferSize)
 159                                 {
 160                                         hexdump(ut->pBuffer, ut->dwBufferSize, "->");
 161                                 }
 162 #endif
 163
 164 #ifndef NO_WINDRVR
 165                                 ret = (*ioctl_func) (fd, request, wdioctl);
 166 #else
 167                                 ret = xpcu_transfer(ut);
 168 #endif
 169
 170 #ifdef DEBUG
 171                                 DPRINTF("Transferred: %lu (%s)\n",ut->dwBytesTransferred, (ut->fRead?"read":"write"));
 172                                 if (ut->fRead && ut->dwBytesTransferred)
 173                                 {
 174                                         hexdump(ut->pBuffer, ut->dwBytesTransferred, "<-");
 175                                 }
 176 #endif
 177                         }
 178                         break;
 179
 180                 case INT_ENABLE_OLD:
 181                 case INT_ENABLE:
 182                         DPRINTF("INT_ENABLE\n");
 183                         {
 184                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 185
 186                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 187                                 it->hInterrupt, it->dwOptions,
 188                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 189                                 it->dwLost, it->fStopped);
 190
 191 #ifndef NO_WINDRVR
 192                                 ret = (*ioctl_func) (fd, request, wdioctl);
 193 #else
 194                                 ret = xpcu_int_state(it, ENABLE_INTERRUPT);
 195 #endif
 196
 197                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 198                                 it->hInterrupt, it->dwOptions,
 199                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 200                                 it->dwLost, it->fStopped);
 201                         }
 202
 203                         break;
 204
 205                 case INT_DISABLE:
 206                         DPRINTF("INT_DISABLE\n");
 207                         {
 208                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 209
 210                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 211                                 it->hInterrupt, it->dwOptions,
 212                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 213                                 it->dwLost, it->fStopped);
 214 #ifndef NO_WINDRVR
 215                                 ret = (*ioctl_func) (fd, request, wdioctl);
 216 #else
 217                                 ret = xpcu_int_state(it, DISABLE_INTERRUPT);
 218 #endif
 219                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 220                                 it->hInterrupt, it->dwOptions,
 221                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 222                                 it->dwLost, it->fStopped);
 223                         }
 224                         break;
 225
 226                 case USB_SET_INTERFACE:
 227                         DPRINTF("USB_SET_INTERFACE\n");
 228                         {
 229                                 struct usb_set_interface *usi = (struct usb_set_interface*)(wdheader->data);
 230
 231                                 DPRINTF("-> unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 232                                 usi->dwUniqueID, usi->dwInterfaceNum,
 233                                 usi->dwAlternateSetting, usi->dwOptions);
 234 #ifndef NO_WINDRVR
 235                                 ret = (*ioctl_func) (fd, request, wdioctl);
 236 #else
 237                                 ret = xpcu_set_interface(usi);
 238 #endif
 239                                 DPRINTF("<- unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 240                                 usi->dwUniqueID, usi->dwInterfaceNum,
 241                                 usi->dwAlternateSetting, usi->dwOptions);
 242                         }
 243                         break;
 244
 245                 case USB_GET_DEVICE_DATA_OLD:
 246                 case USB_GET_DEVICE_DATA:
 247                         DPRINTF("USB_GET_DEVICE_DATA\n");
 248                         {
 249                                 struct usb_get_device_data *ugdd = (struct usb_get_device_data*)(wdheader->data);
 250
 251                                 DPRINTF("-> unique: 0x%lx, bytes: %lu, options: %lx\n",
 252                                 ugdd->dwUniqueID, ugdd->dwBytes,
 253                                 ugdd->dwOptions);
 254
 255                                 ret = xpcu_deviceinfo(ugdd);
 256
 257                         }
 258                         break;
 259
 260                 case EVENT_REGISTER_OLD:
 261                 case EVENT_REGISTER:
 262                         DPRINTF("EVENT_REGISTER\n");
 263                         {
 264                                 struct event *e = (struct event*)(wdheader->data);
 265 #ifdef DEBUG
 266                                 int i;
 267 #endif
 268
 269                                 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",
 270                                 e->handle, e->dwAction,
 271                                 e->dwStatus, e->dwEventId, e->dwCardType,
 272                                 e->hKernelPlugIn, e->dwOptions,
 273                                 e->u.Usb.deviceId.dwVendorId,
 274                                 e->u.Usb.deviceId.dwProductId,
 275                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 276                                 e->dwNumMatchTables);
 277
 278 #ifndef NO_WINDRVR
 279                                 ret = (*ioctl_func) (fd, request, wdioctl);
 280 #else
 281                                 ret = xpcu_find(e);
 282 #endif
 283
 284 #ifdef DEBUG
 285                                 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",
 286                                 e->handle, e->dwAction,
 287                                 e->dwStatus, e->dwEventId, e->dwCardType,
 288                                 e->hKernelPlugIn, e->dwOptions,
 289                                 e->u.Usb.deviceId.dwVendorId,
 290                                 e->u.Usb.deviceId.dwProductId,
 291                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 292                                 e->dwNumMatchTables);
 293
 294                                 for (i = 0; i < e->dwNumMatchTables; i++)
 295                                         DPRINTF("match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 296                                         e->matchTables[i].VendorId,
 297                                         e->matchTables[i].ProductId,
 298                                         e->matchTables[i].bDeviceClass,
 299                                         e->matchTables[i].bDeviceSubClass,
 300                                         e->matchTables[i].bInterfaceClass,
 301                                         e->matchTables[i].bInterfaceSubClass,
 302                                         e->matchTables[i].bInterfaceProtocol);
 303 #endif
 304                         }
 305                         break;
 306
 307                 case TRANSFER_OLD:
 308                 case TRANSFER:
 309                         DPRINTF("TRANSFER\n");
 310                         {
 311                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 312
 313 #ifndef NO_WINDRVR
 314                                 ret = (*ioctl_func) (fd, request, wdioctl);
 315 #else
 316                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, 1);
 317 #endif
 318                         }
 319                         break;
 320
 321                 case MULTI_TRANSFER_OLD:
 322                 case MULTI_TRANSFER:
 323                         DPRINTF("MULTI_TRANSFER\n");
 324                         {
 325                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 326                                 unsigned long num = wdheader->size/sizeof(WD_TRANSFER);
 327 #ifndef NO_WINDRVR
 328                                 ret = (*ioctl_func) (fd, request, wdioctl);
 329 #else
 330                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, num);
 331 #endif
 332                         }
 333                         break;
 334
 335                 case EVENT_UNREGISTER:
 336                         {
 337                                 struct event *e = (struct event*)(wdheader->data);
 338
 339                                 DPRINTF("EVENT_UNREGISTER\n");
 340 #ifndef NO_WINDRVR
 341                                 ret = (*ioctl_func) (fd, request, wdioctl);
 342 #else
 343                                 ret = xpcu_close(e);
 344 #endif
 345                         }
 346                         break;
 347
 348                 case INT_WAIT:
 349                         DPRINTF("INT_WAIT\n");
 350                         {
 351                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 352
 353                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 354                                 it->hInterrupt, it->dwOptions,
 355                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 356                                 it->dwLost, it->fStopped);
 357
 358 #ifndef NO_WINDRVR
 359                                 ret = (*ioctl_func) (fd, request, wdioctl);
 360 #else
 361                                 ret = xpcu_int_wait(it);
 362 #endif
 363
 364                                 DPRINTF("<- INT_WAIT_RETURN: Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 365                                 it->hInterrupt, it->dwOptions, it->dwCmds,
 366                                 it->fEnableOk, it->dwCounter, it->dwLost,
 367                                 it->fStopped);
 368                         }
 369                         break;
 370
 371                 case CARD_UNREGISTER:
 372                         DPRINTF("CARD_UNREGISTER\n");
 373                         {
 374                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 375
 376                                 DPRINTF("-> Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 377                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 378                                 cr->Card.Item[0].I.IO.dwBytes,
 379                                 cr->Card.Item[0].I.IO.dwBar);
 380
 381                                 DPRINTF("-> hCard: %lu\n", cr->hCard);
 382
 383 #ifndef NO_WINDRVR
 384                                 ret = (*ioctl_func) (fd, request, wdioctl);
 385 #else
 386                                 if (pport)
 387                                         pport->close(cr->hCard);
 388
 389                                 pport = NULL;
 390 #endif
 391                         }
 392                         break;
 393
 394                 case EVENT_PULL:
 395                         DPRINTF("EVENT_PULL\n");
 396                         {
 397                                 struct event *e = (struct event*)(wdheader->data);
 398 #ifdef DEBUG
 399                                 int i;
 400
 401                                 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",
 402                                 e->handle, e->dwAction, e->dwStatus,
 403                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 404                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 405                                 e->u.Usb.deviceId.dwProductId,
 406                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 407                                 e->dwNumMatchTables);
 408
 409                                 for (i = 0; i < e->dwNumMatchTables; i++)
 410                                         DPRINTF("-> match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 411                                         e->matchTables[i].VendorId,
 412                                         e->matchTables[i].ProductId,
 413                                         e->matchTables[i].bDeviceClass,
 414                                         e->matchTables[i].bDeviceSubClass,
 415                                         e->matchTables[i].bInterfaceClass,
 416                                         e->matchTables[i].bInterfaceSubClass,
 417                                         e->matchTables[i].bInterfaceProtocol);
 418 #endif
 419
 420 #ifndef NO_WINDRVR
 421                                 ret = (*ioctl_func) (fd, request, wdioctl);
 422 #else
 423                                 ret = xpcu_found(e);
 424 #endif
 425
 426 #ifdef DEBUG
 427                                 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",
 428                                 e->handle, e->dwAction, e->dwStatus,
 429                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 430                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 431                                 e->u.Usb.deviceId.dwProductId,
 432                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 433                                 e->dwNumMatchTables);
 434
 435                                 for (i = 0; i < e->dwNumMatchTables; i++)
 436                                         DPRINTF("<- match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 437                                         e->matchTables[i].VendorId,
 438                                         e->matchTables[i].ProductId,
 439                                         e->matchTables[i].bDeviceClass,
 440                                         e->matchTables[i].bDeviceSubClass,
 441                                         e->matchTables[i].bInterfaceClass,
 442                                         e->matchTables[i].bInterfaceSubClass,
 443                                         e->matchTables[i].bInterfaceProtocol);
 444 #endif
 445
 446                         }
 447                         break;
 448
 449                 default:
 450                         fprintf(stderr,"!!!Unsupported IOCTL: %x!!!\n", request);
 451 #ifndef NO_WINDRVR
 452                         ret = (*ioctl_func) (fd, request, wdioctl);
 453 #endif
 454                         break;
 455         }
 456
 457         return ret;
 458 }
 459
 460 int ioctl(int fd, unsigned long int request, ...) {
 461         va_list args;
 462         void *argp;
 463         int i;
 464
 465         if (!ioctl_func)
 466                 ioctl_func = (int (*) (int, int, void *)) dlsym (RTLD_NEXT, "ioctl");
 467
 468         va_start (args, request);
 469         argp = va_arg (args, void *);
 470         va_end (args);
 471
 472         for (i = 0; i < windrvrfds_count; i++) {
 473                 if (fd == windrvrfds[i])
 474                         return do_wdioctl(fd, request, argp);
 475         }
 476
 477         return (*ioctl_func) (fd, request, argp);
 478 }
 479
 480 int open (const char *pathname, int flags, ...) {
 481         static int (*func) (const char *, int, mode_t) = NULL;
 482         mode_t mode = 0;
 483         va_list args;
 484         int fd;
 485
 486         if (!func)
 487                 func = (int (*) (const char *, int, mode_t)) dlsym (RTLD_NEXT, "open");
 488
 489         if (flags & O_CREAT) {
 490                 va_start(args, flags);
 491                 mode = va_arg(args, mode_t);
 492                 va_end(args);
 493         }
 494
 495         if (!strcmp (pathname, "/dev/windrvr6")) {
 496                 DPRINTF("opening windrvr6 (%d)\n", windrvrfds_count);
 497                 windrvrfds = realloc(windrvrfds, sizeof(int) * (++windrvrfds_count));
 498                 if (!windrvrfds)
 499                         return -ENOMEM;
 500
 501 #ifdef NO_WINDRVR
 502                 windrvrfds[windrvrfds_count-1] = fd = (*func) ("/dev/null", flags, mode);
 503 #else
 504                 windrvrfds[windrvrfds_count-1] = fd = (*func) (pathname, flags, mode);
 505 #endif
 506
 507                 return fd;
 508         }
 509
 510         return (*func) (pathname, flags, mode);
 511 }
 512
 513 int close(int fd) {
 514         static int (*func) (int) = NULL;
 515         int i;
 516
 517         if (!func)
 518                 func = (int (*) (int)) dlsym(RTLD_NEXT, "close");
 519
 520         for (i = 0; i < windrvrfds_count; i++) {
 521                 if (fd == windrvrfds[i] && windrvrfds[i] >= 0) {
 522                         int remaining = windrvrfds_count - (i + 1);
 523                         DPRINTF("close windrvr6 (%d)\n", i);
 524                         if (remaining)
 525                                 memmove(&(windrvrfds[i]), &(windrvrfds[i+1]), remaining * sizeof(int));
 526                         windrvrfds = realloc(windrvrfds, sizeof(int) * --windrvrfds_count);
 527                         if (!windrvrfds_count)
 528                                 windrvrfds = NULL;
 529                         break;
 530                 }
 531         }
 532
 533         return (*func) (fd);
 534 }
 535
 536 FILE *fopen(const char *path, const char *mode) {
 537         FILE *ret;
 538         static FILE* (*func) (const char*, const char*) = NULL;
 539         char buf[256];
 540         int i;
 541
 542         if (!func)
 543                 func = (FILE* (*) (const char*, const char*)) dlsym(RTLD_NEXT, "fopen");
 544
 545         for (i = 0; i < 4; i++) {
 546                 snprintf(buf, sizeof(buf), "/proc/sys/dev/parport/parport%d/base-addr", i);
 547                 if (!strcmp(path, buf)) {
 548                         DPRINTF("open base-addr of parport%d\n", i);
 549                         if (config_is_real_pport(i)) {
 550                                 ret = (*func) (path, mode);
 551                         } else {
 552                                 ret = (*func) ("/dev/null", mode);
 553                         }
 554
 555                         if (ret) {
 556                                 baseaddrfp = ret;
 557                                 baseaddrnum = i;
 558                         }
 559
 560                         return ret;
 561                 }
 562         }
 563
 564         ret = (*func) (path, mode);
 565
 566         if (!strcmp(path, "/proc/modules")) {
 567                 DPRINTF("opening /proc/modules\n");
 568                 if (!ret && errno == ENOENT) {
 569                         /* Hmm.. there appears to be no /proc/modules file
 570                          * fake it then */
 571                         ret = (*func)("/dev/null", mode);
 572                         DPRINTF("No /proc/modules -- faking\n");
 573                 }
 574 #ifdef NO_WINDRVR
 575                 modulesfp = ret;
 576                 modules_read = 0;
 577 #endif
 578         }
 579
 580         return ret;
 581 }
 582
 583 char *fgets(char *s, int size, FILE *stream) {
 584         static char* (*func) (char*, int, FILE*) = NULL;
 585         const char modules[][256] = {"windrvr6 1 0 - Live 0xdeadbeef\n", "parport_pc 1 0 - Live 0xdeadbeef\n"};
 586         char buf[256];
 587         char *ret = NULL;
 588
 589
 590         if (!func)
 591                 func = (char* (*) (char*, int, FILE*)) dlsym(RTLD_NEXT, "fgets");
 592
 593         if (modulesfp == stream) {
 594                 if (modules_read < sizeof(modules) / sizeof(modules[0])) {
 595                         strcpy(s, modules[modules_read]);
 596                         ret = s;
 597                         modules_read++;
 598                 }
 599         } else if (baseaddrfp == stream) {
 600                 snprintf(s, sizeof(buf), "%d\t%d\n",
 601                         (baseaddrnum) * 0x10,
 602                         ((baseaddrnum) * 0x10) + 0x400);
 603                 ret = s;
 604         } else {
 605                 ret = (*func)(s,size,stream);
 606         }
 607
 608         return ret;
 609 }
 610
 611 int fclose(FILE *fp) {
 612         static int (*func) (FILE*) = NULL;
 613
 614         if (!func)
 615                 func = (int (*) (FILE*)) dlsym(RTLD_NEXT, "fclose");
 616
 617         if (fp == modulesfp) {
 618                 modulesfp = NULL;
 619         }
 620
 621         if (fp == baseaddrfp) {
 622                 baseaddrfp = NULL;
 623         }
 624
 625         return (*func)(fp);
 626 }
 627
 628 int access(const char *pathname, int mode) {
 629         static int (*func) (const char*, int);
 630
 631         if (!func)
 632                 func = (int (*) (const char*, int)) dlsym(RTLD_NEXT, "access");
 633
 634         if (pathname && !strcmp(pathname, "/dev/windrvr6")) {
 635                 return 0;
 636         } else {
 637                 return (*func)(pathname, mode);
 638         }
 639 }
 640
 641 #if 0
 642 /* USB cable sharing needs to overload semop, TODO! */
 643 int semop (int __semid, struct sembuf *__sops, size_t __nsops) {
 644         static int (*func) (int, struct sembuf*, size_t) = NULL;
 645         int i;
 646
 647         if (!func)
 648                 func = (int (*) (int, struct sembuf*, size_t)) dlsym(RTLD_NEXT, "semop");
 649
 650         fprintf(stderr,"semop: semid: 0x%X, elements: %d\n", __semid, __nsops);
 651         for (i = 0; i < __nsops; i++) {
 652                 fprintf(stderr, " num: %u, op: %d, flg: %d\n", __sops[i].sem_num, __sops[i].sem_op, __sops[i].sem_flg);
 653                 if (__sops[i].sem_op < 0) {
 654                         fprintf(stderr, "SEMAPHORE LOCK\n");
 655                 } else {
 656                         fprintf(stderr, "SEMAPHORE UNLOCK\n");
 657                 }
 658         }
 659
 660         return (*func)(__semid, __sops, __nsops);
 661 }
 662 #endif
 663
 664 /*
 665  * Ugly hack for ISE 12. Preload doesn't seem to work correctly for
 666  * libImpactComm.so. Even though the file is still read with fopen(),
 667  * the version from libc is used and not the one from this file.
 668  * Replace the function calling fopen() instead...
 669  * echo '_Z14isModuleLoadedPci' | c++filt
 670  */
 671 long int _Z14isModuleLoadedPci(char *module_name, int i) {
 672         DPRINTF("_Z14isModuleLoadedPci: Checking for module %s (%d)\n", module_name, i);
 673
 674         return 1;
 675 }
 676
 677 /* XilCommNS::CPortResources::Instance() */
 678 void* _ZN9XilCommNS14CPortResources8InstanceEv() {
 679         static void* (*func) (void) = NULL;
 680         char *filename = NULL;
 681         void *ret;
 682         int i;
 683
 684         if (!func) {
 685                 func = (void* (*) (void)) dlsym(RTLD_NEXT, "_ZN9XilCommNS14CPortResources8InstanceEv");
 686
 687                 DPRINTF("Searching for filename starting at %p\n", func);
 688                 for(i = 0; i < 16384; i++) {
 689                         if (!strcmp(((char*)func)+i, "/proc/sys/dev/parport/%s/base-addr")) {
 690                                 filename = ((char*)func)+i;
 691                                 DPRINTF("Filename found at offset %p\n", (void*)(filename - ((char*)func)));
 692                                 break;
 693                         }
 694                 }
 695         }
 696
 697         if (filename) {
 698                 long pagesize;
 699                 size_t protectlen;
 700                 void *start;
 701                 int len = strlen(filename) + 1;
 702                 int ret;
 703
 704                 pagesize = sysconf(_SC_PAGE_SIZE);
 705                 DPRINTF("You have %lu bytes sized pages!\n", pagesize);
 706
 707                 start = (void*)((long)filename & (~(pagesize-1)));
 708
 709                 protectlen = pagesize;
 710                 if ((long)(filename + len) > (long)(start + protectlen))
 711                         protectlen += pagesize;
 712
 713                 DPRINTF("Unprotecting %zd bytes starting at %p\n", protectlen, start);
 714                 ret = mprotect(start, protectlen, PROT_READ|PROT_WRITE);
 715                 if (ret == -1)
 716                         perror("mprotect");
 717
 718                 DPRINTF("Replacing %s with /dev/zero\n", filename);
 719                 strcpy(filename, "/dev/zero");
 720
 721                 DPRINTF("Reprotecting %zd bytes starting at %p\n", protectlen, start);
 722                 ret = mprotect(start, protectlen, PROT_READ|PROT_EXEC);
 723                 if (ret == -1)
 724                         perror("mprotect");
 725         }
 726
 727         DPRINTF("-> XilCommNS::CPortResources::Instance()\n");
 728
 729         ret = func();
 730
 731         DPRINTF("<- XilCommNS::CPortResources::Instance()\n");
 732
 733         return ret;
 734 }
 735
 736 static void __attribute__ ((constructor)) libusbdriver_init(void) {
 737         int i;
 738         char buf[256];
 739         char buf2[256];
 740
 741         for (i = 0; i < 4; i++) {
 742                 snprintf(buf, sizeof(buf), "XIL_IMPACT_ENV_LPT%d_BASE_ADDRESS", i+1);
 743                 snprintf(buf2, sizeof(buf2), "%x", 0x10*i);
 744                 setenv(buf, buf2, 1);
 745                 snprintf(buf, sizeof(buf), "XIL_IMPACT_ENV_LPT%d_ECP_ADDRESS", i+1);
 746                 snprintf(buf2, sizeof(buf2), "%x", (0x10*i)+0x400);
 747                 setenv(buf, buf2, 1);
 748         }
 749
 750         setenv("XIL_IMPACT_USE_LIBUSB", "0", 1);
 751         setenv("XIL_IMPACT_USE_WINDRIVER", "1", 1);
 752
 753         #if __WORDSIZE == 32
 754         {
 755                 struct utsname un;
 756                 int ret;
 757
 758                 ret = uname(&un);
 759
 760                 if (ret == 0 && (!strcmp(un.machine, "x86_64"))) {
 761                         DPRINTF("setting 32bit personality\n");
 762                         (long)syscall(SYS_personality, PER_LINUX32);
 763                 }
 764         }
 765         #endif
 766 }