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 <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 = 0;
  65
  66         fprintf(stderr, "%s %03x: ", prefix, i);
  67         for(i = 0; i<len; i++) {
  68                 fprintf(stderr,"%02x ", buf[i]);
  69                 if ((i % 16) == 7)
  70                         fprintf(stderr," ");
  71                 if (((i % 16) == 15) && ((i+1) < len))
  72                         fprintf(stderr,"\n%s %03x: ", prefix, i+1);
  73         }
  74         fprintf(stderr,"\n");
  75 }
  76
  77
  78 static int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
  79         struct header_struct* wdheader = (struct header_struct*)wdioctl;
  80         struct version_struct *version;
  81         int ret = 0;
  82
  83         if (wdheader->magic != MAGIC) {
  84                 fprintf(stderr,"!!!ERROR: magic header does not match!!!\n");
  85                 return (*ioctl_func) (fd, request, wdioctl);
  86         }
  87
  88         switch(request & ~(0xc0000000)) {
  89                 case VERSION:
  90                         version = (struct version_struct*)(wdheader->data);
  91                         strcpy(version->version, "libusb-driver.so version: " USB_DRIVER_VERSION);
  92                         version->versionul = 802;
  93                         DPRINTF("VERSION\n");
  94                         break;
  95
  96                 case LICENSE:
  97                         DPRINTF("LICENSE\n");
  98                         break;
  99
 100                 case CARD_REGISTER_OLD:
 101                 case CARD_REGISTER:
 102                         DPRINTF("CARD_REGISTER\n");
 103                         {
 104                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 105
 106                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 107                                 cr->Card.dwItems,
 108                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 109                                 cr->Card.Item[0].I.IO.dwBytes,
 110                                 cr->Card.Item[0].I.IO.dwBar);
 111
 112                                 DPRINTF("-> Items: %lu, Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 113                                 cr->Card.dwItems,
 114                                 (unsigned long)cr->Card.Item[1].I.IO.dwAddr,
 115                                 cr->Card.Item[1].I.IO.dwBytes,
 116                                 cr->Card.Item[1].I.IO.dwBar);
 117 #ifndef NO_WINDRVR
 118                                 ret = (*ioctl_func) (fd, request, wdioctl);
 119 #else
 120                                 cr->hCard = 0;
 121
 122                                 pport = config_get((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 123                                 if (!pport)
 124                                         break;
 125
 126                                 ret = pport->open((unsigned long)cr->Card.Item[0].I.IO.dwAddr / 0x10);
 127
 128                                 ppbase = (unsigned long)cr->Card.Item[0].I.IO.dwAddr;
 129
 130                                 if (cr->Card.dwItems > 1 && cr->Card.Item[1].I.IO.dwAddr)
 131                                         ecpbase = (unsigned long)cr->Card.Item[1].I.IO.dwAddr;
 132
 133                                 if (ret >= 0) {
 134                                         cr->hCard = ret;
 135                                 } else {
 136                                         cr->hCard = 0;
 137                                 }
 138 #endif
 139                                 DPRINTF("<-hCard: %lu\n", cr->hCard);
 140                         }
 141                         break;
 142
 143                 case USB_TRANSFER:
 144                         DPRINTF("USB_TRANSFER\n");
 145                         {
 146                                 struct usb_transfer *ut = (struct usb_transfer*)(wdheader->data);
 147
 148 #ifdef DEBUG
 149                                 DPRINTF("-> unique: 0x%lx, pipe: %lu, read: %lu, options: %lx, size: %lu, timeout: %lx\n",
 150                                 ut->dwUniqueID, ut->dwPipeNum, ut->fRead,
 151                                 ut->dwOptions, ut->dwBufferSize, ut->dwTimeout);
 152                                 if (ut->dwPipeNum == 0) {
 153                                         DPRINTF("-> setup packet:");
 154                                         hexdump(ut->SetupPacket, 8, "");
 155                                 }
 156
 157                                 if (!ut->fRead && ut->dwBufferSize)
 158                                 {
 159                                         hexdump(ut->pBuffer, ut->dwBufferSize, "->");
 160                                 }
 161 #endif
 162
 163 #ifndef NO_WINDRVR
 164                                 ret = (*ioctl_func) (fd, request, wdioctl);
 165 #else
 166                                 ret = xpcu_transfer(ut);
 167 #endif
 168
 169 #ifdef DEBUG
 170                                 DPRINTF("Transferred: %lu (%s)\n",ut->dwBytesTransferred, (ut->fRead?"read":"write"));
 171                                 if (ut->fRead && ut->dwBytesTransferred)
 172                                 {
 173                                         hexdump(ut->pBuffer, ut->dwBytesTransferred, "<-");
 174                                 }
 175 #endif
 176                         }
 177                         break;
 178
 179                 case INT_ENABLE_OLD:
 180                 case INT_ENABLE:
 181                         DPRINTF("INT_ENABLE\n");
 182                         {
 183                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 184
 185                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 186                                 it->hInterrupt, it->dwOptions,
 187                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 188                                 it->dwLost, it->fStopped);
 189
 190 #ifndef NO_WINDRVR
 191                                 ret = (*ioctl_func) (fd, request, wdioctl);
 192 #else
 193                                 ret = xpcu_int_state(it, ENABLE_INTERRUPT);
 194 #endif
 195
 196                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 197                                 it->hInterrupt, it->dwOptions,
 198                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 199                                 it->dwLost, it->fStopped);
 200                         }
 201
 202                         break;
 203
 204                 case INT_DISABLE:
 205                         DPRINTF("INT_DISABLE\n");
 206                         {
 207                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 208
 209                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 210                                 it->hInterrupt, it->dwOptions,
 211                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 212                                 it->dwLost, it->fStopped);
 213 #ifndef NO_WINDRVR
 214                                 ret = (*ioctl_func) (fd, request, wdioctl);
 215 #else
 216                                 ret = xpcu_int_state(it, DISABLE_INTERRUPT);
 217 #endif
 218                                 DPRINTF("<- Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 219                                 it->hInterrupt, it->dwOptions,
 220                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 221                                 it->dwLost, it->fStopped);
 222                         }
 223                         break;
 224
 225                 case USB_SET_INTERFACE:
 226                         DPRINTF("USB_SET_INTERFACE\n");
 227                         {
 228                                 struct usb_set_interface *usi = (struct usb_set_interface*)(wdheader->data);
 229
 230                                 DPRINTF("-> unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 231                                 usi->dwUniqueID, usi->dwInterfaceNum,
 232                                 usi->dwAlternateSetting, usi->dwOptions);
 233 #ifndef NO_WINDRVR
 234                                 ret = (*ioctl_func) (fd, request, wdioctl);
 235 #else
 236                                 ret = xpcu_set_interface(usi);
 237 #endif
 238                                 DPRINTF("<- unique: 0x%lx, interfacenum: %lu, alternatesetting: %lu, options: %lx\n",
 239                                 usi->dwUniqueID, usi->dwInterfaceNum,
 240                                 usi->dwAlternateSetting, usi->dwOptions);
 241                         }
 242                         break;
 243
 244                 case USB_GET_DEVICE_DATA_OLD:
 245                 case USB_GET_DEVICE_DATA:
 246                         DPRINTF("USB_GET_DEVICE_DATA\n");
 247                         {
 248                                 struct usb_get_device_data *ugdd = (struct usb_get_device_data*)(wdheader->data);
 249
 250                                 DPRINTF("-> unique: 0x%lx, bytes: %lu, options: %lx\n",
 251                                 ugdd->dwUniqueID, ugdd->dwBytes,
 252                                 ugdd->dwOptions);
 253
 254                                 ret = xpcu_deviceinfo(ugdd);
 255
 256                         }
 257                         break;
 258
 259                 case EVENT_REGISTER_OLD:
 260                 case EVENT_REGISTER:
 261                         DPRINTF("EVENT_REGISTER\n");
 262                         {
 263                                 struct event *e = (struct event*)(wdheader->data);
 264 #ifdef DEBUG
 265                                 int i;
 266 #endif
 267
 268                                 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",
 269                                 e->handle, e->dwAction,
 270                                 e->dwStatus, e->dwEventId, e->dwCardType,
 271                                 e->hKernelPlugIn, e->dwOptions,
 272                                 e->u.Usb.deviceId.dwVendorId,
 273                                 e->u.Usb.deviceId.dwProductId,
 274                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 275                                 e->dwNumMatchTables);
 276
 277 #ifndef NO_WINDRVR
 278                                 ret = (*ioctl_func) (fd, request, wdioctl);
 279 #else
 280                                 ret = xpcu_find(e);
 281 #endif
 282
 283 #ifdef DEBUG
 284                                 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",
 285                                 e->handle, e->dwAction,
 286                                 e->dwStatus, e->dwEventId, e->dwCardType,
 287                                 e->hKernelPlugIn, e->dwOptions,
 288                                 e->u.Usb.deviceId.dwVendorId,
 289                                 e->u.Usb.deviceId.dwProductId,
 290                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 291                                 e->dwNumMatchTables);
 292
 293                                 for (i = 0; i < e->dwNumMatchTables; i++)
 294                                         DPRINTF("match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 295                                         e->matchTables[i].VendorId,
 296                                         e->matchTables[i].ProductId,
 297                                         e->matchTables[i].bDeviceClass,
 298                                         e->matchTables[i].bDeviceSubClass,
 299                                         e->matchTables[i].bInterfaceClass,
 300                                         e->matchTables[i].bInterfaceSubClass,
 301                                         e->matchTables[i].bInterfaceProtocol);
 302 #endif
 303                         }
 304                         break;
 305
 306                 case TRANSFER_OLD:
 307                 case TRANSFER:
 308                         DPRINTF("TRANSFER\n");
 309                         {
 310                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 311
 312 #ifndef NO_WINDRVR
 313                                 ret = (*ioctl_func) (fd, request, wdioctl);
 314 #else
 315                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, 1);
 316 #endif
 317                         }
 318                         break;
 319
 320                 case MULTI_TRANSFER_OLD:
 321                 case MULTI_TRANSFER:
 322                         DPRINTF("MULTI_TRANSFER\n");
 323                         {
 324                                 WD_TRANSFER *tr = (WD_TRANSFER*)(wdheader->data);
 325                                 unsigned long num = wdheader->size/sizeof(WD_TRANSFER);
 326 #ifndef NO_WINDRVR
 327                                 ret = (*ioctl_func) (fd, request, wdioctl);
 328 #else
 329                                 ret = pport->transfer(tr, fd, request, ppbase, ecpbase, num);
 330 #endif
 331                         }
 332                         break;
 333
 334                 case EVENT_UNREGISTER:
 335                         {
 336                                 struct event *e = (struct event*)(wdheader->data);
 337
 338                                 DPRINTF("EVENT_UNREGISTER\n");
 339 #ifndef NO_WINDRVR
 340                                 ret = (*ioctl_func) (fd, request, wdioctl);
 341 #else
 342                                 ret = xpcu_close(e);
 343 #endif
 344                         }
 345                         break;
 346
 347                 case INT_WAIT:
 348                         DPRINTF("INT_WAIT\n");
 349                         {
 350                                 struct interrupt *it = (struct interrupt*)(wdheader->data);
 351
 352                                 DPRINTF("-> Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 353                                 it->hInterrupt, it->dwOptions,
 354                                 it->dwCmds, it->fEnableOk, it->dwCounter,
 355                                 it->dwLost, it->fStopped);
 356
 357 #ifndef NO_WINDRVR
 358                                 ret = (*ioctl_func) (fd, request, wdioctl);
 359 #else
 360                                 ret = xpcu_int_wait(it);
 361 #endif
 362
 363                                 DPRINTF("<- INT_WAIT_RETURN: Handle: 0x%lx, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n",
 364                                 it->hInterrupt, it->dwOptions, it->dwCmds,
 365                                 it->fEnableOk, it->dwCounter, it->dwLost,
 366                                 it->fStopped);
 367                         }
 368                         break;
 369
 370                 case CARD_UNREGISTER:
 371                         DPRINTF("CARD_UNREGISTER\n");
 372                         {
 373                                 struct card_register* cr = (struct card_register*)(wdheader->data);
 374
 375                                 DPRINTF("-> Addr: 0x%lx, bytes: %lu, bar: %lu\n",
 376                                 (unsigned long)cr->Card.Item[0].I.IO.dwAddr,
 377                                 cr->Card.Item[0].I.IO.dwBytes,
 378                                 cr->Card.Item[0].I.IO.dwBar);
 379
 380                                 DPRINTF("-> hCard: %lu\n", cr->hCard);
 381
 382 #ifndef NO_WINDRVR
 383                                 ret = (*ioctl_func) (fd, request, wdioctl);
 384 #else
 385                                 if (pport)
 386                                         pport->close(cr->hCard);
 387
 388                                 pport = NULL;
 389 #endif
 390                         }
 391                         break;
 392
 393                 case EVENT_PULL:
 394                         DPRINTF("EVENT_PULL\n");
 395                         {
 396                                 struct event *e = (struct event*)(wdheader->data);
 397 #ifdef DEBUG
 398                                 int i;
 399
 400                                 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",
 401                                 e->handle, e->dwAction, e->dwStatus,
 402                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 403                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 404                                 e->u.Usb.deviceId.dwProductId,
 405                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 406                                 e->dwNumMatchTables);
 407
 408                                 for (i = 0; i < e->dwNumMatchTables; i++)
 409                                         DPRINTF("-> match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 410                                         e->matchTables[i].VendorId,
 411                                         e->matchTables[i].ProductId,
 412                                         e->matchTables[i].bDeviceClass,
 413                                         e->matchTables[i].bDeviceSubClass,
 414                                         e->matchTables[i].bInterfaceClass,
 415                                         e->matchTables[i].bInterfaceSubClass,
 416                                         e->matchTables[i].bInterfaceProtocol);
 417 #endif
 418
 419 #ifndef NO_WINDRVR
 420                                 ret = (*ioctl_func) (fd, request, wdioctl);
 421 #else
 422                                 ret = xpcu_found(e);
 423 #endif
 424
 425 #ifdef DEBUG
 426                                 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",
 427                                 e->handle, e->dwAction, e->dwStatus,
 428                                 e->dwEventId, e->dwCardType, e->hKernelPlugIn,
 429                                 e->dwOptions, e->u.Usb.deviceId.dwVendorId,
 430                                 e->u.Usb.deviceId.dwProductId,
 431                                 e->u.Usb.dwUniqueID, e->dwEventVer,
 432                                 e->dwNumMatchTables);
 433
 434                                 for (i = 0; i < e->dwNumMatchTables; i++)
 435                                         DPRINTF("<- match: dev: %04x:%04x, class: %x, subclass: %x, intclass: %x, intsubclass: %x, intproto: %x\n",
 436                                         e->matchTables[i].VendorId,
 437                                         e->matchTables[i].ProductId,
 438                                         e->matchTables[i].bDeviceClass,
 439                                         e->matchTables[i].bDeviceSubClass,
 440                                         e->matchTables[i].bInterfaceClass,
 441                                         e->matchTables[i].bInterfaceSubClass,
 442                                         e->matchTables[i].bInterfaceProtocol);
 443 #endif
 444
 445                         }
 446                         break;
 447
 448                 default:
 449                         fprintf(stderr,"!!!Unsupported IOCTL: %x!!!\n", request);
 450 #ifndef NO_WINDRVR
 451                         ret = (*ioctl_func) (fd, request, wdioctl);
 452 #endif
 453                         break;
 454         }
 455
 456         return ret;
 457 }
 458
 459 int ioctl(int fd, unsigned long int request, ...) {
 460         va_list args;
 461         void *argp;
 462         int i;
 463
 464         if (!ioctl_func)
 465                 ioctl_func = (int (*) (int, int, void *)) dlsym (RTLD_NEXT, "ioctl");
 466
 467         va_start (args, request);
 468         argp = va_arg (args, void *);
 469         va_end (args);
 470
 471         for (i = 0; i < windrvrfds_count; i++) {
 472                 if (fd == windrvrfds[i])
 473                         return do_wdioctl(fd, request, argp);
 474         }
 475
 476         return (*ioctl_func) (fd, request, argp);
 477 }
 478
 479 int open (const char *pathname, int flags, ...) {
 480         static int (*func) (const char *, int, mode_t) = NULL;
 481         mode_t mode = 0;
 482         va_list args;
 483         int fd;
 484
 485         if (!func)
 486                 func = (int (*) (const char *, int, mode_t)) dlsym (RTLD_NEXT, "open");
 487
 488         if (flags & O_CREAT) {
 489                 va_start(args, flags);
 490                 mode = va_arg(args, mode_t);
 491                 va_end(args);
 492         }
 493
 494         if (!strcmp (pathname, "/dev/windrvr6")) {
 495                 DPRINTF("opening windrvr6 (%d)\n", windrvrfds_count);
 496                 windrvrfds = realloc(windrvrfds, sizeof(int) * (++windrvrfds_count));
 497                 if (!windrvrfds)
 498                         return -ENOMEM;
 499
 500 #ifdef NO_WINDRVR
 501                 windrvrfds[windrvrfds_count-1] = fd = (*func) ("/dev/null", flags, mode);
 502 #else
 503                 windrvrfds[windrvrfds_count-1] = fd = (*func) (pathname, flags, mode);
 504 #endif
 505
 506                 return fd;
 507         }
 508
 509         return (*func) (pathname, flags, mode);
 510 }
 511
 512 int close(int fd) {
 513         static int (*func) (int) = NULL;
 514         int i;
 515
 516         if (!func)
 517                 func = (int (*) (int)) dlsym(RTLD_NEXT, "close");
 518
 519         for (i = 0; i < windrvrfds_count; i++) {
 520                 if (fd == windrvrfds[i] && windrvrfds[i] >= 0) {
 521                         int remaining = windrvrfds_count - (i + 1);
 522                         DPRINTF("close windrvr6 (%d)\n", i);
 523                         if (remaining)
 524                                 memmove(&(windrvrfds[i]), &(windrvrfds[i+1]), remaining * sizeof(int));
 525                         windrvrfds = realloc(windrvrfds, sizeof(int) * --windrvrfds_count);
 526                         if (!windrvrfds_count)
 527                                 windrvrfds = NULL;
 528                         break;
 529                 }
 530         }
 531
 532         return (*func) (fd);
 533 }
 534
 535 FILE *fopen(const char *path, const char *mode) {
 536         FILE *ret;
 537         static FILE* (*func) (const char*, const char*) = NULL;
 538         char buf[256];
 539         int i;
 540
 541         if (!func)
 542                 func = (FILE* (*) (const char*, const char*)) dlsym(RTLD_NEXT, "fopen");
 543
 544         for (i = 0; i < 4; i++) {
 545                 snprintf(buf, sizeof(buf), "/proc/sys/dev/parport/parport%d/base-addr", i);
 546                 if (!strcmp(path, buf)) {
 547                         DPRINTF("open base-addr of parport%d\n", i);
 548                         if (config_is_real_pport(i)) {
 549                                 ret = (*func) (path, mode);
 550                         } else {
 551                                 ret = (*func) ("/dev/null", mode);
 552                         }
 553
 554                         if (ret) {
 555                                 baseaddrfp = ret;
 556                                 baseaddrnum = i;
 557                         }
 558
 559                         return ret;
 560                 }
 561         }
 562
 563         ret = (*func) (path, mode);
 564
 565         if (!strcmp(path, "/proc/modules")) {
 566                 DPRINTF("opening /proc/modules\n");
 567                 if (!ret && errno == ENOENT) {
 568                         /* Hmm.. there appears to be no /proc/modules file
 569                          * fake it then */
 570                         ret = (*func)("/dev/null", mode);
 571                         DPRINTF("No /proc/modules -- faking\n");
 572                 }
 573 #ifdef NO_WINDRVR
 574                 modulesfp = ret;
 575                 modules_read = 0;
 576 #endif
 577         }
 578
 579         return ret;
 580 }
 581
 582 char *fgets(char *s, int size, FILE *stream) {
 583         static char* (*func) (char*, int, FILE*) = NULL;
 584         const char modules[][256] = {"windrvr6 1 0 - Live 0xdeadbeef\n", "parport_pc 1 0 - Live 0xdeadbeef\n"};
 585         char buf[256];
 586         char *ret = NULL;
 587
 588
 589         if (!func)
 590                 func = (char* (*) (char*, int, FILE*)) dlsym(RTLD_NEXT, "fgets");
 591
 592         if (modulesfp == stream) {
 593                 if (modules_read < sizeof(modules) / sizeof(modules[0])) {
 594                         strcpy(s, modules[modules_read]);
 595                         ret = s;
 596                         modules_read++;
 597                 }
 598         } else if (baseaddrfp == stream) {
 599                 snprintf(s, sizeof(buf), "%d\t%d\n",
 600                         (baseaddrnum) * 0x10,
 601                         ((baseaddrnum) * 0x10) + 0x400);
 602                 ret = s;
 603         } else {
 604                 ret = (*func)(s,size,stream);
 605         }
 606
 607         return ret;
 608 }
 609
 610 int fclose(FILE *fp) {
 611         static int (*func) (FILE*) = NULL;
 612
 613         if (!func)
 614                 func = (int (*) (FILE*)) dlsym(RTLD_NEXT, "fclose");
 615
 616         if (fp == modulesfp) {
 617                 modulesfp = NULL;
 618         }
 619
 620         if (fp == baseaddrfp) {
 621                 baseaddrfp = NULL;
 622         }
 623
 624         return (*func)(fp);
 625 }
 626
 627 int access(const char *pathname, int mode) {
 628         static int (*func) (const char*, int);
 629
 630         if (!func)
 631                 func = (int (*) (const char*, int)) dlsym(RTLD_NEXT, "access");
 632
 633         if (pathname && !strcmp(pathname, "/dev/windrvr6")) {
 634                 return 0;
 635         } else {
 636                 return (*func)(pathname, mode);
 637         }
 638 }
 639
 640 #if 0
 641 /* USB cable sharing needs to overload semop, TODO! */
 642 int semop (int __semid, struct sembuf *__sops, size_t __nsops) {
 643         static int (*func) (int, struct sembuf*, size_t) = NULL;
 644         int i;
 645
 646         if (!func)
 647                 func = (int (*) (int, struct sembuf*, size_t)) dlsym(RTLD_NEXT, "semop");
 648
 649         fprintf(stderr,"semop: semid: 0x%X, elements: %d\n", __semid, __nsops);
 650         for (i = 0; i < __nsops; i++) {
 651                 fprintf(stderr, " num: %u, op: %d, flg: %d\n", __sops[i].sem_num, __sops[i].sem_op, __sops[i].sem_flg);
 652                 if (__sops[i].sem_op < 0) {
 653                         fprintf(stderr, "SEMAPHORE LOCK\n");
 654                 } else {
 655                         fprintf(stderr, "SEMAPHORE UNLOCK\n");
 656                 }
 657         }
 658
 659         return (*func)(__semid, __sops, __nsops);
 660 }
 661 #endif
 662
 663 /*
 664  * Ugly hack for ISE 12. Preload doesn't seem to work correctly for
 665  * libImpactComm.so. Even though the file is still read with fopen(),
 666  * the version from libc is used and not the one from this file.
 667  * Replace the function calling fopen() instead...
 668  * echo '_Z14isModuleLoadedPci' | c++filt
 669  */
 670 long int _Z14isModuleLoadedPci(char *module_name, int i) {
 671         DPRINTF("_Z14isModuleLoadedPci: Checking for module %s (%d)\n", module_name, i);
 672
 673         return 1;
 674 }
 675
 676 /* XilCommNS::CPortResources::Instance() */
 677 void* _ZN9XilCommNS14CPortResources8InstanceEv() {
 678         static void* (*func) (void) = NULL;
 679         void *ret;
 680
 681         if (!func)
 682                 func = (void* (*) (void)) dlsym(RTLD_NEXT, "_ZN9XilCommNS14CPortResources8InstanceEv");
 683
 684         DPRINTF("-> XilCommNS::CPortResources::Instance()\n");
 685
 686         ret = func();
 687
 688 #ifdef DEBUG
 689         hexdump(ret, 0x29, "<-");
 690         #if 0
 691         {
 692                 void *portinfo;
 693                 portinfo = ((unsigned char**)ret+0x00);
 694                 hexdump(portinfo, 256, "PI");
 695                 hexdump(portinfo+0x50, 4, "BS");
 696                 hexdump(portinfo+0x54, 4, "BE");
 697                 hexdump(portinfo+0x58, 4, "ES");
 698                 hexdump(portinfo+0x5c, 4, "EE");
 699         }
 700         #endif
 701 #endif
 702
 703         DPRINTF("<- XilCommNS::CPortResources::Instance()\n");
 704
 705         return ret;
 706 }
 707
 708 static void __attribute__ ((constructor)) libusbdriver_init(void) {
 709         int i;
 710         char buf[256];
 711         char buf2[256];
 712
 713         for (i = 0; i < 4; i++) {
 714                 snprintf(buf, sizeof(buf), "XIL_IMPACT_ENV_LPT%d_BASE_ADDRESS", i+1);
 715                 snprintf(buf2, sizeof(buf2), "%x", 0x10*i);
 716                 setenv(buf, buf2, 1);
 717                 snprintf(buf, sizeof(buf), "XIL_IMPACT_ENV_LPT%d_ECP_ADDRESS", i+1);
 718                 snprintf(buf2, sizeof(buf2), "%x", (0x10*i)+0x400);
 719                 setenv(buf, buf2, 1);
 720         }
 721
 722         setenv("XIL_IMPACT_USE_LIBUSB", "0", 1);
 723         setenv("XIL_IMPACT_USE_WINDRIVER", "1", 1);
 724
 725         #if __WORDSIZE == 32
 726         {
 727                 struct utsname un;
 728                 int ret;
 729
 730                 ret = uname(&un);
 731
 732                 if (ret == 0 && (!strcmp(un.machine, "x86_64"))) {
 733                         DPRINTF("setting 32bit personality\n");
 734                         (long)syscall(SYS_personality, PER_LINUX32);
 735                 }
 736         }
 737         #endif
 738 }