common/spartan3.c

   1 /*
   2  * (C) Copyright 2002
   3  * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  *
  23  */
  24
  25 /*
  26  * Configuration support for Xilinx Spartan3 devices.  Based
  27  * on spartan2.c (Rich Ireland, rireland@enterasys.com).
  28  */
  29
  30 #include <common.h>             /* core U-Boot definitions */
  31 #include <spartan3.h>           /* Spartan-II device family */
  32
  33 #if (CONFIG_FPGA & (CFG_XILINX | CFG_SPARTAN3))
  34
  35 /* Define FPGA_DEBUG to get debug printf's */
  36 #ifdef  FPGA_DEBUG
  37 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  38 #else
  39 #define PRINTF(fmt,args...)
  40 #endif
  41
  42 #undef CFG_FPGA_CHECK_BUSY
  43 #undef CFG_FPGA_PROG_FEEDBACK
  44
  45 /* Note: The assumption is that we cannot possibly run fast enough to
  46  * overrun the device (the Slave Parallel mode can free run at 50MHz).
  47  * If there is a need to operate slower, define CONFIG_FPGA_DELAY in
  48  * the board config file to slow things down.
  49  */
  50 #ifndef CONFIG_FPGA_DELAY
  51 #define CONFIG_FPGA_DELAY()
  52 #endif
  53
  54 #ifndef CFG_FPGA_WAIT
  55 #define CFG_FPGA_WAIT CFG_HZ/100        /* 10 ms */
  56 #endif
  57
  58 static int Spartan3_sp_load( Xilinx_desc *desc, void *buf, size_t bsize );
  59 static int Spartan3_sp_dump( Xilinx_desc *desc, void *buf, size_t bsize );
  60 /* static int Spartan3_sp_info( Xilinx_desc *desc ); */
  61 static int Spartan3_sp_reloc( Xilinx_desc *desc, ulong reloc_offset );
  62
  63 static int Spartan3_ss_load( Xilinx_desc *desc, void *buf, size_t bsize );
  64 static int Spartan3_ss_dump( Xilinx_desc *desc, void *buf, size_t bsize );
  65 /* static int Spartan3_ss_info( Xilinx_desc *desc ); */
  66 static int Spartan3_ss_reloc( Xilinx_desc *desc, ulong reloc_offset );
  67
  68 /* ------------------------------------------------------------------------- */
  69 /* Spartan-II Generic Implementation */
  70 int Spartan3_load (Xilinx_desc * desc, void *buf, size_t bsize)
  71 {
  72         int ret_val = FPGA_FAIL;
  73
  74         switch (desc->iface) {
  75         case slave_serial:
  76                 PRINTF ("%s: Launching Slave Serial Load\n", __FUNCTION__);
  77                 ret_val = Spartan3_ss_load (desc, buf, bsize);
  78                 break;
  79
  80         case slave_parallel:
  81                 PRINTF ("%s: Launching Slave Parallel Load\n", __FUNCTION__);
  82                 ret_val = Spartan3_sp_load (desc, buf, bsize);
  83                 break;
  84
  85         default:
  86                 printf ("%s: Unsupported interface type, %d\n",
  87                                 __FUNCTION__, desc->iface);
  88         }
  89
  90         return ret_val;
  91 }
  92
  93 int Spartan3_dump (Xilinx_desc * desc, void *buf, size_t bsize)
  94 {
  95         int ret_val = FPGA_FAIL;
  96
  97         switch (desc->iface) {
  98         case slave_serial:
  99                 PRINTF ("%s: Launching Slave Serial Dump\n", __FUNCTION__);
 100                 ret_val = Spartan3_ss_dump (desc, buf, bsize);
 101                 break;
 102
 103         case slave_parallel:
 104                 PRINTF ("%s: Launching Slave Parallel Dump\n", __FUNCTION__);
 105                 ret_val = Spartan3_sp_dump (desc, buf, bsize);
 106                 break;
 107
 108         default:
 109                 printf ("%s: Unsupported interface type, %d\n",
 110                                 __FUNCTION__, desc->iface);
 111         }
 112
 113         return ret_val;
 114 }
 115
 116 int Spartan3_info( Xilinx_desc *desc )
 117 {
 118         return FPGA_SUCCESS;
 119 }
 120
 121
 122 int Spartan3_reloc (Xilinx_desc * desc, ulong reloc_offset)
 123 {
 124         int ret_val = FPGA_FAIL;        /* assume a failure */
 125
 126         if (desc->family != Xilinx_Spartan3) {
 127                 printf ("%s: Unsupported family type, %d\n",
 128                                 __FUNCTION__, desc->family);
 129                 return FPGA_FAIL;
 130         } else
 131                 switch (desc->iface) {
 132                 case slave_serial:
 133                         ret_val = Spartan3_ss_reloc (desc, reloc_offset);
 134                         break;
 135
 136                 case slave_parallel:
 137                         ret_val = Spartan3_sp_reloc (desc, reloc_offset);
 138                         break;
 139
 140                 default:
 141                         printf ("%s: Unsupported interface type, %d\n",
 142                                         __FUNCTION__, desc->iface);
 143                 }
 144
 145         return ret_val;
 146 }
 147
 148
 149 /* ------------------------------------------------------------------------- */
 150 /* Spartan-II Slave Parallel Generic Implementation */
 151
 152 static int Spartan3_sp_load (Xilinx_desc * desc, void *buf, size_t bsize)
 153 {
 154         int ret_val = FPGA_FAIL;        /* assume the worst */
 155         Xilinx_Spartan3_Slave_Parallel_fns *fn = desc->iface_fns;
 156
 157         PRINTF ("%s: start with interface functions @ 0x%p\n",
 158                         __FUNCTION__, fn);
 159
 160         if (fn) {
 161                 size_t bytecount = 0;
 162                 unsigned char *data = (unsigned char *) buf;
 163                 int cookie = desc->cookie;      /* make a local copy */
 164                 unsigned long ts;               /* timestamp */
 165
 166                 PRINTF ("%s: Function Table:\n"
 167                                 "ptr:\t0x%p\n"
 168                                 "struct: 0x%p\n"
 169                                 "pre: 0x%p\n"
 170                                 "pgm:\t0x%p\n"
 171                                 "init:\t0x%p\n"
 172                                 "err:\t0x%p\n"
 173                                 "clk:\t0x%p\n"
 174                                 "cs:\t0x%p\n"
 175                                 "wr:\t0x%p\n"
 176                                 "read data:\t0x%p\n"
 177                                 "write data:\t0x%p\n"
 178                                 "busy:\t0x%p\n"
 179                                 "abort:\t0x%p\n",
 180                                 "post:\t0x%p\n\n",
 181                                 __FUNCTION__, &fn, fn, fn->pre, fn->pgm, fn->init, fn->err,
 182                                 fn->clk, fn->cs, fn->wr, fn->rdata, fn->wdata, fn->busy,
 183                                 fn->abort, fn->post);
 184
 185                 /*
 186                  * This code is designed to emulate the "Express Style"
 187                  * Continuous Data Loading in Slave Parallel Mode for
 188                  * the Spartan-II Family.
 189                  */
 190 #ifdef CFG_FPGA_PROG_FEEDBACK
 191                 printf ("Loading FPGA Device %d...\n", cookie);
 192 #endif
 193                 /*
 194                  * Run the pre configuration function if there is one.
 195                  */
 196                 if (*fn->pre) {
 197                         (*fn->pre) (cookie);
 198                 }
 199
 200                 /* Establish the initial state */
 201                 (*fn->pgm) (TRUE, TRUE, cookie);        /* Assert the program, commit */
 202
 203                 /* Get ready for the burn */
 204                 CONFIG_FPGA_DELAY ();
 205                 (*fn->pgm) (FALSE, TRUE, cookie);       /* Deassert the program, commit */
 206
 207                 ts = get_timer (0);             /* get current time */
 208                 /* Now wait for INIT and BUSY to go high */
 209                 do {
 210                         CONFIG_FPGA_DELAY ();
 211                         if (get_timer (ts) > CFG_FPGA_WAIT) {   /* check the time */
 212                                 puts ("** Timeout waiting for INIT to clear.\n");
 213                                 (*fn->abort) (cookie);  /* abort the burn */
 214                                 return FPGA_FAIL;
 215                         }
 216                 } while ((*fn->init) (cookie) && (*fn->busy) (cookie));
 217
 218                 (*fn->wr) (TRUE, TRUE, cookie); /* Assert write, commit */
 219                 (*fn->cs) (TRUE, TRUE, cookie); /* Assert chip select, commit */
 220                 (*fn->clk) (TRUE, TRUE, cookie);        /* Assert the clock pin */
 221
 222                 /* Load the data */
 223                 while (bytecount < bsize) {
 224                         /* XXX - do we check for an Ctrl-C press in here ??? */
 225                         /* XXX - Check the error bit? */
 226
 227                         (*fn->wdata) (data[bytecount++], TRUE, cookie); /* write the data */
 228                         CONFIG_FPGA_DELAY ();
 229                         (*fn->clk) (FALSE, TRUE, cookie);       /* Deassert the clock pin */
 230                         CONFIG_FPGA_DELAY ();
 231                         (*fn->clk) (TRUE, TRUE, cookie);        /* Assert the clock pin */
 232
 233 #ifdef CFG_FPGA_CHECK_BUSY
 234                         ts = get_timer (0);     /* get current time */
 235                         while ((*fn->busy) (cookie)) {
 236                                 /* XXX - we should have a check in here somewhere to
 237                                  * make sure we aren't busy forever... */
 238
 239                                 CONFIG_FPGA_DELAY ();
 240                                 (*fn->clk) (FALSE, TRUE, cookie);       /* Deassert the clock pin */
 241                                 CONFIG_FPGA_DELAY ();
 242                                 (*fn->clk) (TRUE, TRUE, cookie);        /* Assert the clock pin */
 243
 244                                 if (get_timer (ts) > CFG_FPGA_WAIT) {   /* check the time */
 245                                         puts ("** Timeout waiting for BUSY to clear.\n");
 246                                         (*fn->abort) (cookie);  /* abort the burn */
 247                                         return FPGA_FAIL;
 248                                 }
 249                         }
 250 #endif
 251
 252 #ifdef CFG_FPGA_PROG_FEEDBACK
 253                         if (bytecount % (bsize / 40) == 0)
 254                                 putc ('.');             /* let them know we are alive */
 255 #endif
 256                 }
 257
 258                 CONFIG_FPGA_DELAY ();
 259                 (*fn->cs) (FALSE, TRUE, cookie);        /* Deassert the chip select */
 260                 (*fn->wr) (FALSE, TRUE, cookie);        /* Deassert the write pin */
 261
 262 #ifdef CFG_FPGA_PROG_FEEDBACK
 263                 putc ('\n');                    /* terminate the dotted line */
 264 #endif
 265
 266                 /* now check for done signal */
 267                 ts = get_timer (0);             /* get current time */
 268                 ret_val = FPGA_SUCCESS;
 269                 while ((*fn->done) (cookie) == FPGA_FAIL) {
 270                         /* XXX - we should have a check in here somewhere to
 271                          * make sure we aren't busy forever... */
 272
 273                         CONFIG_FPGA_DELAY ();
 274                         (*fn->clk) (FALSE, TRUE, cookie);       /* Deassert the clock pin */
 275                         CONFIG_FPGA_DELAY ();
 276                         (*fn->clk) (TRUE, TRUE, cookie);        /* Assert the clock pin */
 277
 278                         if (get_timer (ts) > CFG_FPGA_WAIT) {   /* check the time */
 279                                 puts ("** Timeout waiting for DONE to clear.\n");
 280                                 (*fn->abort) (cookie);  /* abort the burn */
 281                                 ret_val = FPGA_FAIL;
 282                                 break;
 283                         }
 284                 }
 285
 286                 if (ret_val == FPGA_SUCCESS) {
 287 #ifdef CFG_FPGA_PROG_FEEDBACK
 288                         puts ("Done.\n");
 289 #endif
 290                 }
 291                 /*
 292                  * Run the post configuration function if there is one.
 293                  */
 294                 if (*fn->post) {
 295                         (*fn->post) (cookie);
 296                 }
 297
 298                 else {
 299 #ifdef CFG_FPGA_PROG_FEEDBACK
 300                         puts ("Fail.\n");
 301 #endif
 302                 }
 303
 304         } else {
 305                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 306         }
 307
 308         return ret_val;
 309 }
 310
 311 static int Spartan3_sp_dump (Xilinx_desc * desc, void *buf, size_t bsize)
 312 {
 313         int ret_val = FPGA_FAIL;        /* assume the worst */
 314         Xilinx_Spartan3_Slave_Parallel_fns *fn = desc->iface_fns;
 315
 316         if (fn) {
 317                 unsigned char *data = (unsigned char *) buf;
 318                 size_t bytecount = 0;
 319                 int cookie = desc->cookie;      /* make a local copy */
 320
 321                 printf ("Starting Dump of FPGA Device %d...\n", cookie);
 322
 323                 (*fn->cs) (TRUE, TRUE, cookie); /* Assert chip select, commit */
 324                 (*fn->clk) (TRUE, TRUE, cookie);        /* Assert the clock pin */
 325
 326                 /* dump the data */
 327                 while (bytecount < bsize) {
 328                         /* XXX - do we check for an Ctrl-C press in here ??? */
 329
 330                         (*fn->clk) (FALSE, TRUE, cookie);       /* Deassert the clock pin */
 331                         (*fn->clk) (TRUE, TRUE, cookie);        /* Assert the clock pin */
 332                         (*fn->rdata) (&(data[bytecount++]), cookie);    /* read the data */
 333 #ifdef CFG_FPGA_PROG_FEEDBACK
 334                         if (bytecount % (bsize / 40) == 0)
 335                                 putc ('.');             /* let them know we are alive */
 336 #endif
 337                 }
 338
 339                 (*fn->cs) (FALSE, FALSE, cookie);       /* Deassert the chip select */
 340                 (*fn->clk) (FALSE, TRUE, cookie);       /* Deassert the clock pin */
 341                 (*fn->clk) (TRUE, TRUE, cookie);        /* Assert the clock pin */
 342
 343 #ifdef CFG_FPGA_PROG_FEEDBACK
 344                 putc ('\n');                    /* terminate the dotted line */
 345 #endif
 346                 puts ("Done.\n");
 347
 348                 /* XXX - checksum the data? */
 349         } else {
 350                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 351         }
 352
 353         return ret_val;
 354 }
 355
 356
 357 static int Spartan3_sp_reloc (Xilinx_desc * desc, ulong reloc_offset)
 358 {
 359         int ret_val = FPGA_FAIL;        /* assume the worst */
 360         Xilinx_Spartan3_Slave_Parallel_fns *fn_r, *fn =
 361                         (Xilinx_Spartan3_Slave_Parallel_fns *) (desc->iface_fns);
 362
 363         if (fn) {
 364                 ulong addr;
 365
 366                 /* Get the relocated table address */
 367                 addr = (ulong) fn + reloc_offset;
 368                 fn_r = (Xilinx_Spartan3_Slave_Parallel_fns *) addr;
 369
 370                 if (!fn_r->relocated) {
 371
 372                         if (memcmp (fn_r, fn,
 373                                                 sizeof (Xilinx_Spartan3_Slave_Parallel_fns))
 374                                 == 0) {
 375                                 /* good copy of the table, fix the descriptor pointer */
 376                                 desc->iface_fns = fn_r;
 377                         } else {
 378                                 PRINTF ("%s: Invalid function table at 0x%p\n",
 379                                                 __FUNCTION__, fn_r);
 380                                 return FPGA_FAIL;
 381                         }
 382
 383                         PRINTF ("%s: Relocating descriptor at 0x%p\n", __FUNCTION__,
 384                                         desc);
 385
 386                         addr = (ulong) (fn->pre) + reloc_offset;
 387                         fn_r->pre = (Xilinx_pre_fn) addr;
 388
 389                         addr = (ulong) (fn->pgm) + reloc_offset;
 390                         fn_r->pgm = (Xilinx_pgm_fn) addr;
 391
 392                         addr = (ulong) (fn->init) + reloc_offset;
 393                         fn_r->init = (Xilinx_init_fn) addr;
 394
 395                         addr = (ulong) (fn->done) + reloc_offset;
 396                         fn_r->done = (Xilinx_done_fn) addr;
 397
 398                         addr = (ulong) (fn->clk) + reloc_offset;
 399                         fn_r->clk = (Xilinx_clk_fn) addr;
 400
 401                         addr = (ulong) (fn->err) + reloc_offset;
 402                         fn_r->err = (Xilinx_err_fn) addr;
 403
 404                         addr = (ulong) (fn->cs) + reloc_offset;
 405                         fn_r->cs = (Xilinx_cs_fn) addr;
 406
 407                         addr = (ulong) (fn->wr) + reloc_offset;
 408                         fn_r->wr = (Xilinx_wr_fn) addr;
 409
 410                         addr = (ulong) (fn->rdata) + reloc_offset;
 411                         fn_r->rdata = (Xilinx_rdata_fn) addr;
 412
 413                         addr = (ulong) (fn->wdata) + reloc_offset;
 414                         fn_r->wdata = (Xilinx_wdata_fn) addr;
 415
 416                         addr = (ulong) (fn->busy) + reloc_offset;
 417                         fn_r->busy = (Xilinx_busy_fn) addr;
 418
 419                         addr = (ulong) (fn->abort) + reloc_offset;
 420                         fn_r->abort = (Xilinx_abort_fn) addr;
 421
 422                         addr = (ulong) (fn->post) + reloc_offset;
 423                         fn_r->post = (Xilinx_post_fn) addr;
 424
 425                         fn_r->relocated = TRUE;
 426
 427                 } else {
 428                         /* this table has already been moved */
 429                         /* XXX - should check to see if the descriptor is correct */
 430                         desc->iface_fns = fn_r;
 431                 }
 432
 433                 ret_val = FPGA_SUCCESS;
 434         } else {
 435                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 436         }
 437
 438         return ret_val;
 439
 440 }
 441
 442 /* ------------------------------------------------------------------------- */
 443
 444 static int Spartan3_ss_load (Xilinx_desc * desc, void *buf, size_t bsize)
 445 {
 446         int ret_val = FPGA_FAIL;        /* assume the worst */
 447         Xilinx_Spartan3_Slave_Serial_fns *fn = desc->iface_fns;
 448         int i;
 449         char  val;
 450
 451         PRINTF ("%s: start with interface functions @ 0x%p\n",
 452                         __FUNCTION__, fn);
 453
 454         if (fn) {
 455                 size_t bytecount = 0;
 456                 unsigned char *data = (unsigned char *) buf;
 457                 int cookie = desc->cookie;      /* make a local copy */
 458                 unsigned long ts;               /* timestamp */
 459
 460                 PRINTF ("%s: Function Table:\n"
 461                                 "ptr:\t0x%p\n"
 462                                 "struct: 0x%p\n"
 463                                 "pgm:\t0x%p\n"
 464                                 "init:\t0x%p\n"
 465                                 "clk:\t0x%p\n"
 466                                 "wr:\t0x%p\n"
 467                                 "done:\t0x%p\n\n",
 468                                 __FUNCTION__, &fn, fn, fn->pgm, fn->init,
 469                                 fn->clk, fn->wr, fn->done);
 470 #ifdef CFG_FPGA_PROG_FEEDBACK
 471                 printf ("Loading FPGA Device %d...\n", cookie);
 472 #endif
 473
 474                 /*
 475                  * Run the pre configuration function if there is one.
 476                  */
 477                 if (*fn->pre) {
 478                         (*fn->pre) (cookie);
 479                 }
 480
 481                 /* Establish the initial state */
 482                 (*fn->pgm) (TRUE, TRUE, cookie);        /* Assert the program, commit */
 483
 484                 /* Wait for INIT state (init low)                            */
 485                 ts = get_timer (0);             /* get current time */
 486                 do {
 487                         CONFIG_FPGA_DELAY ();
 488                         if (get_timer (ts) > CFG_FPGA_WAIT) {   /* check the time */
 489                                 puts ("** Timeout waiting for INIT to start.\n");
 490                                 return FPGA_FAIL;
 491                         }
 492                 } while (!(*fn->init) (cookie));
 493
 494                 /* Get ready for the burn */
 495                 CONFIG_FPGA_DELAY ();
 496                 (*fn->pgm) (FALSE, TRUE, cookie);       /* Deassert the program, commit */
 497
 498                 ts = get_timer (0);             /* get current time */
 499                 /* Now wait for INIT to go high */
 500                 do {
 501                         CONFIG_FPGA_DELAY ();
 502                         if (get_timer (ts) > CFG_FPGA_WAIT) {   /* check the time */
 503                                 puts ("** Timeout waiting for INIT to clear.\n");
 504                                 return FPGA_FAIL;
 505                         }
 506                 } while ((*fn->init) (cookie));
 507
 508                 /* Load the data */
 509                 while (bytecount < bsize) {
 510
 511                         /* Xilinx detects an error if INIT goes low (active)
 512                            while DONE is low (inactive) */
 513                         if ((*fn->done) (cookie) == 0 && (*fn->init) (cookie)) {
 514                                 puts ("** CRC error during FPGA load.\n");
 515                                 return (FPGA_FAIL);
 516                         }
 517                         val = data [bytecount ++];
 518                         i = 8;
 519                         do {
 520                                 /* Deassert the clock */
 521                                 (*fn->clk) (FALSE, TRUE, cookie);
 522                                 CONFIG_FPGA_DELAY ();
 523                                 /* Write data */
 524                                 (*fn->wr) ((val < 0), TRUE, cookie);
 525                                 CONFIG_FPGA_DELAY ();
 526                                 /* Assert the clock */
 527                                 (*fn->clk) (TRUE, TRUE, cookie);
 528                                 CONFIG_FPGA_DELAY ();
 529                                 val <<= 1;
 530                                 i --;
 531                         } while (i > 0);
 532
 533 #ifdef CFG_FPGA_PROG_FEEDBACK
 534                         if (bytecount % (bsize / 40) == 0)
 535                                 putc ('.');             /* let them know we are alive */
 536 #endif
 537                 }
 538
 539                 CONFIG_FPGA_DELAY ();
 540
 541 #ifdef CFG_FPGA_PROG_FEEDBACK
 542                 putc ('\n');                    /* terminate the dotted line */
 543 #endif
 544
 545                 /* now check for done signal */
 546                 ts = get_timer (0);             /* get current time */
 547                 ret_val = FPGA_SUCCESS;
 548                 (*fn->wr) (TRUE, TRUE, cookie);
 549
 550                 while (! (*fn->done) (cookie)) {
 551                         /* XXX - we should have a check in here somewhere to
 552                          * make sure we aren't busy forever... */
 553
 554                         CONFIG_FPGA_DELAY ();
 555                         (*fn->clk) (FALSE, TRUE, cookie);       /* Deassert the clock pin */
 556                         CONFIG_FPGA_DELAY ();
 557                         (*fn->clk) (TRUE, TRUE, cookie);        /* Assert the clock pin */
 558
 559                         putc ('*');
 560
 561                         if (get_timer (ts) > CFG_FPGA_WAIT) {   /* check the time */
 562                                 puts ("** Timeout waiting for DONE to clear.\n");
 563                                 ret_val = FPGA_FAIL;
 564                                 break;
 565                         }
 566                 }
 567                 putc ('\n');                    /* terminate the dotted line */
 568
 569 #ifdef CFG_FPGA_PROG_FEEDBACK
 570                 if (ret_val == FPGA_SUCCESS) {
 571                         puts ("Done.\n");
 572                 }
 573                 else {
 574                         puts ("Fail.\n");
 575                 }
 576 #endif
 577
 578         } else {
 579                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 580         }
 581
 582         return ret_val;
 583 }
 584
 585 static int Spartan3_ss_dump (Xilinx_desc * desc, void *buf, size_t bsize)
 586 {
 587         /* Readback is only available through the Slave Parallel and         */
 588         /* boundary-scan interfaces.                                         */
 589         printf ("%s: Slave Serial Dumping is unavailable\n",
 590                         __FUNCTION__);
 591         return FPGA_FAIL;
 592 }
 593
 594 static int Spartan3_ss_reloc (Xilinx_desc * desc, ulong reloc_offset)
 595 {
 596         int ret_val = FPGA_FAIL;        /* assume the worst */
 597         Xilinx_Spartan3_Slave_Serial_fns *fn_r, *fn =
 598                         (Xilinx_Spartan3_Slave_Serial_fns *) (desc->iface_fns);
 599
 600         if (fn) {
 601                 ulong addr;
 602
 603                 /* Get the relocated table address */
 604                 addr = (ulong) fn + reloc_offset;
 605                 fn_r = (Xilinx_Spartan3_Slave_Serial_fns *) addr;
 606
 607                 if (!fn_r->relocated) {
 608
 609                         if (memcmp (fn_r, fn,
 610                                                 sizeof (Xilinx_Spartan3_Slave_Serial_fns))
 611                                 == 0) {
 612                                 /* good copy of the table, fix the descriptor pointer */
 613                                 desc->iface_fns = fn_r;
 614                         } else {
 615                                 PRINTF ("%s: Invalid function table at 0x%p\n",
 616                                                 __FUNCTION__, fn_r);
 617                                 return FPGA_FAIL;
 618                         }
 619
 620                         PRINTF ("%s: Relocating descriptor at 0x%p\n", __FUNCTION__,
 621                                         desc);
 622
 623                         addr = (ulong) (fn->pre) + reloc_offset;
 624                         fn_r->pre = (Xilinx_pre_fn) addr;
 625
 626                         addr = (ulong) (fn->pgm) + reloc_offset;
 627                         fn_r->pgm = (Xilinx_pgm_fn) addr;
 628
 629                         addr = (ulong) (fn->init) + reloc_offset;
 630                         fn_r->init = (Xilinx_init_fn) addr;
 631
 632                         addr = (ulong) (fn->done) + reloc_offset;
 633                         fn_r->done = (Xilinx_done_fn) addr;
 634
 635                         addr = (ulong) (fn->clk) + reloc_offset;
 636                         fn_r->clk = (Xilinx_clk_fn) addr;
 637
 638                         addr = (ulong) (fn->wr) + reloc_offset;
 639                         fn_r->wr = (Xilinx_wr_fn) addr;
 640
 641                         fn_r->relocated = TRUE;
 642
 643                 } else {
 644                         /* this table has already been moved */
 645                         /* XXX - should check to see if the descriptor is correct */
 646                         desc->iface_fns = fn_r;
 647                 }
 648
 649                 ret_val = FPGA_SUCCESS;
 650         } else {
 651                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 652         }
 653
 654         return ret_val;
 655
 656 }
 657
 658 #endif