drivers/fpga/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 /* Define FPGA_DEBUG to get debug printf's */
  34 #ifdef  FPGA_DEBUG
  35 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  36 #else
  37 #define PRINTF(fmt,args...)
  38 #endif
  39
  40 #undef CONFIG_SYS_FPGA_CHECK_BUSY
  41
  42 /* Note: The assumption is that we cannot possibly run fast enough to
  43  * overrun the device (the Slave Parallel mode can free run at 50MHz).
  44  * If there is a need to operate slower, define CONFIG_FPGA_DELAY in
  45  * the board config file to slow things down.
  46  */
  47 #ifndef CONFIG_FPGA_DELAY
  48 #define CONFIG_FPGA_DELAY()
  49 #endif
  50
  51 #ifndef CONFIG_SYS_FPGA_WAIT
  52 #define CONFIG_SYS_FPGA_WAIT CONFIG_SYS_HZ/100  /* 10 ms */
  53 #endif
  54
  55 static int Spartan3_sp_load(Xilinx_desc *desc, const void *buf, size_t bsize);
  56 static int Spartan3_sp_dump(Xilinx_desc *desc, const void *buf, size_t bsize);
  57 /* static int Spartan3_sp_info(Xilinx_desc *desc ); */
  58
  59 static int Spartan3_ss_load(Xilinx_desc *desc, const void *buf, size_t bsize);
  60 static int Spartan3_ss_dump(Xilinx_desc *desc, const void *buf, size_t bsize);
  61 /* static int Spartan3_ss_info(Xilinx_desc *desc); */
  62
  63 /* ------------------------------------------------------------------------- */
  64 /* Spartan-II Generic Implementation */
  65 int Spartan3_load(Xilinx_desc *desc, const void *buf, size_t bsize)
  66 {
  67         int ret_val = FPGA_FAIL;
  68
  69         switch (desc->iface) {
  70         case slave_serial:
  71                 PRINTF ("%s: Launching Slave Serial Load\n", __FUNCTION__);
  72                 ret_val = Spartan3_ss_load (desc, buf, bsize);
  73                 break;
  74
  75         case slave_parallel:
  76                 PRINTF ("%s: Launching Slave Parallel Load\n", __FUNCTION__);
  77                 ret_val = Spartan3_sp_load (desc, buf, bsize);
  78                 break;
  79
  80         default:
  81                 printf ("%s: Unsupported interface type, %d\n",
  82                                 __FUNCTION__, desc->iface);
  83         }
  84
  85         return ret_val;
  86 }
  87
  88 int Spartan3_dump(Xilinx_desc *desc, const void *buf, size_t bsize)
  89 {
  90         int ret_val = FPGA_FAIL;
  91
  92         switch (desc->iface) {
  93         case slave_serial:
  94                 PRINTF ("%s: Launching Slave Serial Dump\n", __FUNCTION__);
  95                 ret_val = Spartan3_ss_dump (desc, buf, bsize);
  96                 break;
  97
  98         case slave_parallel:
  99                 PRINTF ("%s: Launching Slave Parallel Dump\n", __FUNCTION__);
 100                 ret_val = Spartan3_sp_dump (desc, buf, bsize);
 101                 break;
 102
 103         default:
 104                 printf ("%s: Unsupported interface type, %d\n",
 105                                 __FUNCTION__, desc->iface);
 106         }
 107
 108         return ret_val;
 109 }
 110
 111 int Spartan3_info( Xilinx_desc *desc )
 112 {
 113         return FPGA_SUCCESS;
 114 }
 115
 116
 117 /* ------------------------------------------------------------------------- */
 118 /* Spartan-II Slave Parallel Generic Implementation */
 119
 120 static int Spartan3_sp_load(Xilinx_desc *desc, const void *buf, size_t bsize)
 121 {
 122         int ret_val = FPGA_FAIL;        /* assume the worst */
 123         Xilinx_Spartan3_Slave_Parallel_fns *fn = desc->iface_fns;
 124
 125         PRINTF ("%s: start with interface functions @ 0x%p\n",
 126                         __FUNCTION__, fn);
 127
 128         if (fn) {
 129                 size_t bytecount = 0;
 130                 unsigned char *data = (unsigned char *) buf;
 131                 int cookie = desc->cookie;      /* make a local copy */
 132                 unsigned long ts;               /* timestamp */
 133
 134                 PRINTF ("%s: Function Table:\n"
 135                                 "ptr:\t0x%p\n"
 136                                 "struct: 0x%p\n"
 137                                 "pre: 0x%p\n"
 138                                 "pgm:\t0x%p\n"
 139                                 "init:\t0x%p\n"
 140                                 "err:\t0x%p\n"
 141                                 "clk:\t0x%p\n"
 142                                 "cs:\t0x%p\n"
 143                                 "wr:\t0x%p\n"
 144                                 "read data:\t0x%p\n"
 145                                 "write data:\t0x%p\n"
 146                                 "busy:\t0x%p\n"
 147                                 "abort:\t0x%p\n",
 148                                 "post:\t0x%p\n\n",
 149                                 __FUNCTION__, &fn, fn, fn->pre, fn->pgm, fn->init, fn->err,
 150                                 fn->clk, fn->cs, fn->wr, fn->rdata, fn->wdata, fn->busy,
 151                                 fn->abort, fn->post);
 152
 153                 /*
 154                  * This code is designed to emulate the "Express Style"
 155                  * Continuous Data Loading in Slave Parallel Mode for
 156                  * the Spartan-II Family.
 157                  */
 158 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 159                 printf ("Loading FPGA Device %d...\n", cookie);
 160 #endif
 161                 /*
 162                  * Run the pre configuration function if there is one.
 163                  */
 164                 if (*fn->pre) {
 165                         (*fn->pre) (cookie);
 166                 }
 167
 168                 /* Establish the initial state */
 169                 (*fn->pgm) (true, true, cookie);        /* Assert the program, commit */
 170
 171                 /* Get ready for the burn */
 172                 CONFIG_FPGA_DELAY ();
 173                 (*fn->pgm) (false, true, cookie);       /* Deassert the program, commit */
 174
 175                 ts = get_timer (0);             /* get current time */
 176                 /* Now wait for INIT and BUSY to go high */
 177                 do {
 178                         CONFIG_FPGA_DELAY ();
 179                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 180                                 puts ("** Timeout waiting for INIT to clear.\n");
 181                                 (*fn->abort) (cookie);  /* abort the burn */
 182                                 return FPGA_FAIL;
 183                         }
 184                 } while ((*fn->init) (cookie) && (*fn->busy) (cookie));
 185
 186                 (*fn->wr) (true, true, cookie); /* Assert write, commit */
 187                 (*fn->cs) (true, true, cookie); /* Assert chip select, commit */
 188                 (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 189
 190                 /* Load the data */
 191                 while (bytecount < bsize) {
 192                         /* XXX - do we check for an Ctrl-C press in here ??? */
 193                         /* XXX - Check the error bit? */
 194
 195                         (*fn->wdata) (data[bytecount++], true, cookie); /* write the data */
 196                         CONFIG_FPGA_DELAY ();
 197                         (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 198                         CONFIG_FPGA_DELAY ();
 199                         (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 200
 201 #ifdef CONFIG_SYS_FPGA_CHECK_BUSY
 202                         ts = get_timer (0);     /* get current time */
 203                         while ((*fn->busy) (cookie)) {
 204                                 /* XXX - we should have a check in here somewhere to
 205                                  * make sure we aren't busy forever... */
 206
 207                                 CONFIG_FPGA_DELAY ();
 208                                 (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 209                                 CONFIG_FPGA_DELAY ();
 210                                 (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 211
 212                                 if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 213                                         puts ("** Timeout waiting for BUSY to clear.\n");
 214                                         (*fn->abort) (cookie);  /* abort the burn */
 215                                         return FPGA_FAIL;
 216                                 }
 217                         }
 218 #endif
 219
 220 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 221                         if (bytecount % (bsize / 40) == 0)
 222                                 putc ('.');             /* let them know we are alive */
 223 #endif
 224                 }
 225
 226                 CONFIG_FPGA_DELAY ();
 227                 (*fn->cs) (false, true, cookie);        /* Deassert the chip select */
 228                 (*fn->wr) (false, true, cookie);        /* Deassert the write pin */
 229
 230 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 231                 putc ('\n');                    /* terminate the dotted line */
 232 #endif
 233
 234                 /* now check for done signal */
 235                 ts = get_timer (0);             /* get current time */
 236                 ret_val = FPGA_SUCCESS;
 237                 while ((*fn->done) (cookie) == FPGA_FAIL) {
 238                         /* XXX - we should have a check in here somewhere to
 239                          * make sure we aren't busy forever... */
 240
 241                         CONFIG_FPGA_DELAY ();
 242                         (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 243                         CONFIG_FPGA_DELAY ();
 244                         (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 245
 246                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 247                                 puts ("** Timeout waiting for DONE to clear.\n");
 248                                 (*fn->abort) (cookie);  /* abort the burn */
 249                                 ret_val = FPGA_FAIL;
 250                                 break;
 251                         }
 252                 }
 253
 254                 /*
 255                  * Run the post configuration function if there is one.
 256                  */
 257                 if (*fn->post)
 258                         (*fn->post) (cookie);
 259
 260 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 261                 if (ret_val == FPGA_SUCCESS)
 262                         puts ("Done.\n");
 263                 else
 264                         puts ("Fail.\n");
 265 #endif
 266
 267         } else {
 268                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 269         }
 270
 271         return ret_val;
 272 }
 273
 274 static int Spartan3_sp_dump(Xilinx_desc *desc, const void *buf, size_t bsize)
 275 {
 276         int ret_val = FPGA_FAIL;        /* assume the worst */
 277         Xilinx_Spartan3_Slave_Parallel_fns *fn = desc->iface_fns;
 278
 279         if (fn) {
 280                 unsigned char *data = (unsigned char *) buf;
 281                 size_t bytecount = 0;
 282                 int cookie = desc->cookie;      /* make a local copy */
 283
 284                 printf ("Starting Dump of FPGA Device %d...\n", cookie);
 285
 286                 (*fn->cs) (true, true, cookie); /* Assert chip select, commit */
 287                 (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 288
 289                 /* dump the data */
 290                 while (bytecount < bsize) {
 291                         /* XXX - do we check for an Ctrl-C press in here ??? */
 292
 293                         (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 294                         (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 295                         (*fn->rdata) (&(data[bytecount++]), cookie);    /* read the data */
 296 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 297                         if (bytecount % (bsize / 40) == 0)
 298                                 putc ('.');             /* let them know we are alive */
 299 #endif
 300                 }
 301
 302                 (*fn->cs) (false, false, cookie);       /* Deassert the chip select */
 303                 (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 304                 (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 305
 306 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 307                 putc ('\n');                    /* terminate the dotted line */
 308 #endif
 309                 puts ("Done.\n");
 310
 311                 /* XXX - checksum the data? */
 312         } else {
 313                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 314         }
 315
 316         return ret_val;
 317 }
 318
 319
 320 /* ------------------------------------------------------------------------- */
 321
 322 static int Spartan3_ss_load(Xilinx_desc *desc, const void *buf, size_t bsize)
 323 {
 324         int ret_val = FPGA_FAIL;        /* assume the worst */
 325         Xilinx_Spartan3_Slave_Serial_fns *fn = desc->iface_fns;
 326         int i;
 327         unsigned char val;
 328
 329         PRINTF ("%s: start with interface functions @ 0x%p\n",
 330                         __FUNCTION__, fn);
 331
 332         if (fn) {
 333                 size_t bytecount = 0;
 334                 unsigned char *data = (unsigned char *) buf;
 335                 int cookie = desc->cookie;      /* make a local copy */
 336                 unsigned long ts;               /* timestamp */
 337
 338                 PRINTF ("%s: Function Table:\n"
 339                                 "ptr:\t0x%p\n"
 340                                 "struct: 0x%p\n"
 341                                 "pgm:\t0x%p\n"
 342                                 "init:\t0x%p\n"
 343                                 "clk:\t0x%p\n"
 344                                 "wr:\t0x%p\n"
 345                                 "done:\t0x%p\n\n",
 346                                 __FUNCTION__, &fn, fn, fn->pgm, fn->init,
 347                                 fn->clk, fn->wr, fn->done);
 348 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 349                 printf ("Loading FPGA Device %d...\n", cookie);
 350 #endif
 351
 352                 /*
 353                  * Run the pre configuration function if there is one.
 354                  */
 355                 if (*fn->pre) {
 356                         (*fn->pre) (cookie);
 357                 }
 358
 359                 /* Establish the initial state */
 360                 (*fn->pgm) (true, true, cookie);        /* Assert the program, commit */
 361
 362                 /* Wait for INIT state (init low)                            */
 363                 ts = get_timer (0);             /* get current time */
 364                 do {
 365                         CONFIG_FPGA_DELAY ();
 366                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 367                                 puts ("** Timeout waiting for INIT to start.\n");
 368                                 if (*fn->abort)
 369                                         (*fn->abort) (cookie);
 370                                 return FPGA_FAIL;
 371                         }
 372                 } while (!(*fn->init) (cookie));
 373
 374                 /* Get ready for the burn */
 375                 CONFIG_FPGA_DELAY ();
 376                 (*fn->pgm) (false, true, cookie);       /* Deassert the program, commit */
 377
 378                 ts = get_timer (0);             /* get current time */
 379                 /* Now wait for INIT to go high */
 380                 do {
 381                         CONFIG_FPGA_DELAY ();
 382                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 383                                 puts ("** Timeout waiting for INIT to clear.\n");
 384                                 if (*fn->abort)
 385                                         (*fn->abort) (cookie);
 386                                 return FPGA_FAIL;
 387                         }
 388                 } while ((*fn->init) (cookie));
 389
 390                 /* Load the data */
 391                 if(*fn->bwr)
 392                         (*fn->bwr) (data, bsize, true, cookie);
 393                 else {
 394                         while (bytecount < bsize) {
 395
 396                                 /* Xilinx detects an error if INIT goes low (active)
 397                                    while DONE is low (inactive) */
 398                                 if ((*fn->done) (cookie) == 0 && (*fn->init) (cookie)) {
 399                                         puts ("** CRC error during FPGA load.\n");
 400                                         if (*fn->abort)
 401                                                 (*fn->abort) (cookie);
 402                                         return (FPGA_FAIL);
 403                                 }
 404                                 val = data [bytecount ++];
 405                                 i = 8;
 406                                 do {
 407                                         /* Deassert the clock */
 408                                         (*fn->clk) (false, true, cookie);
 409                                         CONFIG_FPGA_DELAY ();
 410                                         /* Write data */
 411                                         (*fn->wr) ((val & 0x80), true, cookie);
 412                                         CONFIG_FPGA_DELAY ();
 413                                         /* Assert the clock */
 414                                         (*fn->clk) (true, true, cookie);
 415                                         CONFIG_FPGA_DELAY ();
 416                                         val <<= 1;
 417                                         i --;
 418                                 } while (i > 0);
 419
 420 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 421                                 if (bytecount % (bsize / 40) == 0)
 422                                         putc ('.');             /* let them know we are alive */
 423 #endif
 424                         }
 425                 }
 426
 427                 CONFIG_FPGA_DELAY ();
 428
 429 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 430                 putc ('\n');                    /* terminate the dotted line */
 431 #endif
 432
 433                 /* now check for done signal */
 434                 ts = get_timer (0);             /* get current time */
 435                 ret_val = FPGA_SUCCESS;
 436                 (*fn->wr) (true, true, cookie);
 437
 438                 while (! (*fn->done) (cookie)) {
 439                         /* XXX - we should have a check in here somewhere to
 440                          * make sure we aren't busy forever... */
 441
 442                         CONFIG_FPGA_DELAY ();
 443                         (*fn->clk) (false, true, cookie);       /* Deassert the clock pin */
 444                         CONFIG_FPGA_DELAY ();
 445                         (*fn->clk) (true, true, cookie);        /* Assert the clock pin */
 446
 447                         putc ('*');
 448
 449                         if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT) {    /* check the time */
 450                                 puts ("** Timeout waiting for DONE to clear.\n");
 451                                 ret_val = FPGA_FAIL;
 452                                 break;
 453                         }
 454                 }
 455                 putc ('\n');                    /* terminate the dotted line */
 456
 457                 /*
 458                  * Run the post configuration function if there is one.
 459                  */
 460                 if (*fn->post)
 461                         (*fn->post) (cookie);
 462
 463 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
 464                 if (ret_val == FPGA_SUCCESS)
 465                         puts ("Done.\n");
 466                 else
 467                         puts ("Fail.\n");
 468 #endif
 469
 470         } else {
 471                 printf ("%s: NULL Interface function table!\n", __FUNCTION__);
 472         }
 473
 474         return ret_val;
 475 }
 476
 477 static int Spartan3_ss_dump(Xilinx_desc *desc, const void *buf, size_t bsize)
 478 {
 479         /* Readback is only available through the Slave Parallel and         */
 480         /* boundary-scan interfaces.                                         */
 481         printf ("%s: Slave Serial Dumping is unavailable\n",
 482                         __FUNCTION__);
 483         return FPGA_FAIL;
 484 }