drivers/fpga/spartan2.c

   1 /*
   2  * (C) Copyright 2002
   3  * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>             /* core U-Boot definitions */
   9 #include <spartan2.h>           /* Spartan-II device family */
  10
  11 /* Define FPGA_DEBUG to get debug printf's */
  12 #ifdef  FPGA_DEBUG
  13 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  14 #else
  15 #define PRINTF(fmt,args...)
  16 #endif
  17
  18 #undef CONFIG_SYS_FPGA_CHECK_BUSY
  19 #undef CONFIG_SYS_FPGA_PROG_FEEDBACK
  20
  21 /* Note: The assumption is that we cannot possibly run fast enough to
  22  * overrun the device (the Slave Parallel mode can free run at 50MHz).
  23  * If there is a need to operate slower, define CONFIG_FPGA_DELAY in
  24  * the board config file to slow things down.
  25  */
  26 #ifndef CONFIG_FPGA_DELAY
  27 #define CONFIG_FPGA_DELAY()
  28 #endif
  29
  30 #ifndef CONFIG_SYS_FPGA_WAIT
  31 #define CONFIG_SYS_FPGA_WAIT CONFIG_SYS_HZ/100  /* 10 ms */
  32 #endif
  33
  34 static int Spartan2_sp_load(Xilinx_desc *desc, const void *buf, size_t bsize);
  35 static int Spartan2_sp_dump(Xilinx_desc *desc, const void *buf, size_t bsize);
  36 /* static int Spartan2_sp_info(Xilinx_desc *desc ); */
  37
  38 static int Spartan2_ss_load(Xilinx_desc *desc, const void *buf, size_t bsize);
  39 static int Spartan2_ss_dump(Xilinx_desc *desc, const void *buf, size_t bsize);
  40 /* static int Spartan2_ss_info(Xilinx_desc *desc ); */
  41
  42 /* ------------------------------------------------------------------------- */
  43 /* Spartan-II Generic Implementation */
  44 int Spartan2_load(Xilinx_desc *desc, const void *buf, size_t bsize)
  45 {
  46         int ret_val = FPGA_FAIL;
  47
  48         switch (desc->iface) {
  49         case slave_serial:
  50                 PRINTF ("%s: Launching Slave Serial Load\n", __FUNCTION__);
  51                 ret_val = Spartan2_ss_load (desc, buf, bsize);
  52                 break;
  53
  54         case slave_parallel:
  55                 PRINTF ("%s: Launching Slave Parallel Load\n", __FUNCTION__);
  56                 ret_val = Spartan2_sp_load (desc, buf, bsize);
  57                 break;
  58
  59         default:
  60                 printf ("%s: Unsupported interface type, %d\n",
  61                                 __FUNCTION__, desc->iface);
  62         }
  63
  64         return ret_val;
  65 }
  66
  67 int Spartan2_dump(Xilinx_desc *desc, const void *buf, size_t bsize)
  68 {
  69         int ret_val = FPGA_FAIL;
  70
  71         switch (desc->iface) {
  72         case slave_serial:
  73                 PRINTF ("%s: Launching Slave Serial Dump\n", __FUNCTION__);
  74                 ret_val = Spartan2_ss_dump (desc, buf, bsize);
  75                 break;
  76
  77         case slave_parallel:
  78                 PRINTF ("%s: Launching Slave Parallel Dump\n", __FUNCTION__);
  79                 ret_val = Spartan2_sp_dump (desc, buf, bsize);
  80                 break;
  81
  82         default:
  83                 printf ("%s: Unsupported interface type, %d\n",
  84                                 __FUNCTION__, desc->iface);
  85         }
  86
  87         return ret_val;
  88 }
  89
  90 int Spartan2_info( Xilinx_desc *desc )
  91 {
  92         return FPGA_SUCCESS;
  93 }
  94
  95
  96 /* ------------------------------------------------------------------------- */
  97 /* Spartan-II Slave Parallel Generic Implementation */
  98
  99 static int Spartan2_sp_load(Xilinx_desc *desc, const void *buf, size_t bsize)
 100 {
 101         int ret_val = FPGA_FAIL;        /* assume the worst */
 102         Xilinx_Spartan2_Slave_Parallel_fns *fn = desc->iface_fns;
 103
 104         PRINTF ("%s: start with interface functions @ 0x%p\n",
 105                         __FUNCTION__, fn);
 106
 107         if (fn) {
 108                 size_t bytecount = 0;
 109                 unsigned char *data = (unsigned char *) buf;
 110                 int cookie = desc->cookie;      /* make a local copy */
 111                 unsigned long ts;               /* timestamp */
 112
 113                 PRINTF ("%s: Function Table:\n"
 114                                 "ptr:\t0x%p\n"
 115                                 "struct: 0x%p\n"
 116                                 "pre: 0x%p\n"
 117                                 "pgm:\t0x%p\n"
 118                                 "init:\t0x%p\n"
 119                                 "err:\t0x%p\n"
 120                                 "clk:\t0x%p\n"
 121                                 "cs:\t0x%p\n"
 122                                 "wr:\t0x%p\n"
 123                                 "read data:\t0x%p\n"
 124                                 "write data:\t0x%p\n"
 125                                 "busy:\t0x%p\n"
 126                                 "abort:\t0x%p\n",
 127                                 "post:\t0x%p\n\n",
 128                                 __FUNCTION__, &fn, fn, fn->pre, fn->pgm, fn->init, fn->err,
 129                                 fn->clk, fn->cs, fn->wr, fn->rdata, fn->wdata, fn->busy,
 130                                 fn->abort, fn->post);
 131
 132                 /*
 133                  * This code is designed to emulate the "Express Style"
 134                  * Continuous Data Loading in Slave Parallel Mode for
 135                  * the Spartan-II Family.
 136                  */
 137 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 138                 printf ("Loading FPGA Device %d...\n", cookie);
 139 #endif
 140                 /*
 141                  * Run the pre configuration function if there is one.
 142                  */
 143                 if (*fn->pre) {
 144                         (*fn->pre) (cookie);
 145                 }
 146
 147                 /* Establish the initial state */
 148                 (*fn->pgm) (true, true, cookie);        /* Assert the program, commit */
 149
 150                 /* Get ready for the burn */
 151                 CONFIG_FPGA_DELAY ();
 152                 (*fn->pgm) (false, true, cookie);       /* Deassert the program, commit */
 153
 154                 ts = get_timer (0);             /* get current time */
 155                 /* Now wait for INIT and BUSY to go high */
 156                 do {
 157                         CONFIG_FPGA_DELAY ();
 158                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 159                                 puts ("** Timeout waiting for INIT to clear.\n");
 160                                 (*fn->abort) (cookie);  /* abort the burn */
 161                                 return FPGA_FAIL;
 162                         }
 163                 } while ((*fn->init) (cookie) && (*fn->busy) (cookie));
 164
 165                 (*fn->wr) (true, true, cookie); /* Assert write, commit */
 166                 (*fn->cs) (true, true, cookie); /* Assert chip select, commit */
 167                 (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 168
 169                 /* Load the data */
 170                 while (bytecount < bsize) {
 171                         /* XXX - do we check for an Ctrl-C press in here ??? */
 172                         /* XXX - Check the error bit? */
 173
 174                         (*fn->wdata) (data[bytecount++], true, cookie); /* write the data */
 175                         CONFIG_FPGA_DELAY ();
 176                         (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 177                         CONFIG_FPGA_DELAY ();
 178                         (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 179
 180 #ifdef CONFIG_SYS_FPGA_CHECK_BUSY
 181                         ts = get_timer (0);     /* get current time */
 182                         while ((*fn->busy) (cookie)) {
 183                                 /* XXX - we should have a check in here somewhere to
 184                                  * make sure we aren't busy forever... */
 185
 186                                 CONFIG_FPGA_DELAY ();
 187                                 (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 188                                 CONFIG_FPGA_DELAY ();
 189                                 (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 190
 191                                 if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 192                                         puts ("** Timeout waiting for BUSY to clear.\n");
 193                                         (*fn->abort) (cookie);  /* abort the burn */
 194                                         return FPGA_FAIL;
 195                                 }
 196                         }
 197 #endif
 198
 199 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 200                         if (bytecount % (bsize / 40) == 0)
 201                                 putc ('.');             /* let them know we are alive */
 202 #endif
 203                 }
 204
 205                 CONFIG_FPGA_DELAY ();
 206                 (*fn->cs) (false, true, cookie);        /* Deassert the chip select */
 207                 (*fn->wr) (false, true, cookie);        /* Deassert the write pin */
 208
 209 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 210                 putc ('\n');                    /* terminate the dotted line */
 211 #endif
 212
 213                 /* now check for done signal */
 214                 ts = get_timer (0);             /* get current time */
 215                 ret_val = FPGA_SUCCESS;
 216                 while ((*fn->done) (cookie) == FPGA_FAIL) {
 217
 218                         CONFIG_FPGA_DELAY ();
 219                         (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 220                         CONFIG_FPGA_DELAY ();
 221                         (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 222
 223                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 224                                 puts ("** Timeout waiting for DONE to clear.\n");
 225                                 (*fn->abort) (cookie);  /* abort the burn */
 226                                 ret_val = FPGA_FAIL;
 227                                 break;
 228                         }
 229                 }
 230
 231                 /*
 232                  * Run the post configuration function if there is one.
 233                  */
 234                 if (*fn->post)
 235                         (*fn->post) (cookie);
 236
 237 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 238                 if (ret_val == FPGA_SUCCESS)
 239                         puts ("Done.\n");
 240                 else
 241                         puts ("Fail.\n");
 242 #endif
 243
 244         } else {
 245                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 246         }
 247
 248         return ret_val;
 249 }
 250
 251 static int Spartan2_sp_dump(Xilinx_desc *desc, const void *buf, size_t bsize)
 252 {
 253         int ret_val = FPGA_FAIL;        /* assume the worst */
 254         Xilinx_Spartan2_Slave_Parallel_fns *fn = desc->iface_fns;
 255
 256         if (fn) {
 257                 unsigned char *data = (unsigned char *) buf;
 258                 size_t bytecount = 0;
 259                 int cookie = desc->cookie;      /* make a local copy */
 260
 261                 printf ("Starting Dump of FPGA Device %d...\n", cookie);
 262
 263                 (*fn->cs) (true, true, cookie); /* Assert chip select, commit */
 264                 (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 265
 266                 /* dump the data */
 267                 while (bytecount < bsize) {
 268                         /* XXX - do we check for an Ctrl-C press in here ??? */
 269
 270                         (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 271                         (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 272                         (*fn->rdata) (&(data[bytecount++]), cookie);    /* read the data */
 273 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 274                         if (bytecount % (bsize / 40) == 0)
 275                                 putc ('.');             /* let them know we are alive */
 276 #endif
 277                 }
 278
 279                 (*fn->cs) (false, false, cookie);       /* Deassert the chip select */
 280                 (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 281                 (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 282
 283 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 284                 putc ('\n');                    /* terminate the dotted line */
 285 #endif
 286                 puts ("Done.\n");
 287
 288                 /* XXX - checksum the data? */
 289         } else {
 290                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 291         }
 292
 293         return ret_val;
 294 }
 295
 296
 297 /* ------------------------------------------------------------------------- */
 298
 299 static int Spartan2_ss_load(Xilinx_desc *desc, const void *buf, size_t bsize)
 300 {
 301         int ret_val = FPGA_FAIL;        /* assume the worst */
 302         Xilinx_Spartan2_Slave_Serial_fns *fn = desc->iface_fns;
 303         int i;
 304         unsigned char val;
 305
 306         PRINTF ("%s: start with interface functions @ 0x%p\n",
 307                         __FUNCTION__, fn);
 308
 309         if (fn) {
 310                 size_t bytecount = 0;
 311                 unsigned char *data = (unsigned char *) buf;
 312                 int cookie = desc->cookie;      /* make a local copy */
 313                 unsigned long ts;               /* timestamp */
 314
 315                 PRINTF ("%s: Function Table:\n"
 316                                 "ptr:\t0x%p\n"
 317                                 "struct: 0x%p\n"
 318                                 "pgm:\t0x%p\n"
 319                                 "init:\t0x%p\n"
 320                                 "clk:\t0x%p\n"
 321                                 "wr:\t0x%p\n"
 322                                 "done:\t0x%p\n\n",
 323                                 __FUNCTION__, &fn, fn, fn->pgm, fn->init,
 324                                 fn->clk, fn->wr, fn->done);
 325 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 326                 printf ("Loading FPGA Device %d...\n", cookie);
 327 #endif
 328
 329                 /*
 330                  * Run the pre configuration function if there is one.
 331                  */
 332                 if (*fn->pre) {
 333                         (*fn->pre) (cookie);
 334                 }
 335
 336                 /* Establish the initial state */
 337                 (*fn->pgm) (true, true, cookie);        /* Assert the program, commit */
 338
 339                 /* Wait for INIT state (init low)                            */
 340                 ts = get_timer (0);             /* get current time */
 341                 do {
 342                         CONFIG_FPGA_DELAY ();
 343                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 344                                 puts ("** Timeout waiting for INIT to start.\n");
 345                                 return FPGA_FAIL;
 346                         }
 347                 } while (!(*fn->init) (cookie));
 348
 349                 /* Get ready for the burn */
 350                 CONFIG_FPGA_DELAY ();
 351                 (*fn->pgm) (false, true, cookie);       /* Deassert the program, commit */
 352
 353                 ts = get_timer (0);             /* get current time */
 354                 /* Now wait for INIT to go high */
 355                 do {
 356                         CONFIG_FPGA_DELAY ();
 357                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 358                                 puts ("** Timeout waiting for INIT to clear.\n");
 359                                 return FPGA_FAIL;
 360                         }
 361                 } while ((*fn->init) (cookie));
 362
 363                 /* Load the data */
 364                 while (bytecount < bsize) {
 365
 366                         /* Xilinx detects an error if INIT goes low (active)
 367                            while DONE is low (inactive) */
 368                         if ((*fn->done) (cookie) == 0 && (*fn->init) (cookie)) {
 369                                 puts ("** CRC error during FPGA load.\n");
 370                                 return (FPGA_FAIL);
 371                         }
 372                         val = data [bytecount ++];
 373                         i = 8;
 374                         do {
 375                                 /* Deassert the clock */
 376                                 (*fn->clk) (false, true, cookie);
 377                                 CONFIG_FPGA_DELAY ();
 378                                 /* Write data */
 379                                 (*fn->wr) ((val & 0x80), true, cookie);
 380                                 CONFIG_FPGA_DELAY ();
 381                                 /* Assert the clock */
 382                                 (*fn->clk) (true, true, cookie);
 383                                 CONFIG_FPGA_DELAY ();
 384                                 val <<= 1;
 385                                 i --;
 386                         } while (i > 0);
 387
 388 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 389                         if (bytecount % (bsize / 40) == 0)
 390                                 putc ('.');             /* let them know we are alive */
 391 #endif
 392                 }
 393
 394                 CONFIG_FPGA_DELAY ();
 395
 396 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 397                 putc ('\n');                    /* terminate the dotted line */
 398 #endif
 399
 400                 /* now check for done signal */
 401                 ts = get_timer (0);             /* get current time */
 402                 ret_val = FPGA_SUCCESS;
 403                 (*fn->wr) (true, true, cookie);
 404
 405                 while (! (*fn->done) (cookie)) {
 406
 407                         CONFIG_FPGA_DELAY ();
 408                         (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 409                         CONFIG_FPGA_DELAY ();
 410                         (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 411
 412                         putc ('*');
 413
 414                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 415                                 puts ("** Timeout waiting for DONE to clear.\n");
 416                                 ret_val = FPGA_FAIL;
 417                                 break;
 418                         }
 419                 }
 420                 putc ('\n');                    /* terminate the dotted line */
 421
 422                 /*
 423                  * Run the post configuration function if there is one.
 424                  */
 425                 if (*fn->post)
 426                         (*fn->post) (cookie);
 427
 428 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 429                 if (ret_val == FPGA_SUCCESS)
 430                         puts ("Done.\n");
 431                 else
 432                         puts ("Fail.\n");
 433 #endif
 434
 435         } else {
 436                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 437         }
 438
 439         return ret_val;
 440 }
 441
 442 static int Spartan2_ss_dump(Xilinx_desc *desc, const void *buf, size_t bsize)
 443 {
 444         /* Readback is only available through the Slave Parallel and         */
 445         /* boundary-scan interfaces.                                         */
 446         printf ("%s: Slave Serial Dumping is unavailable\n",
 447                         __FUNCTION__);
 448         return FPGA_FAIL;
 449 }