board/mpl/common/flash.c

   1 /*
   2  * (C) Copyright 2000, 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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  * Modified 4/5/2001
  26  * Wait for completion of each sector erase command issued
  27  * 4/5/2001
  28  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  29  */
  30
  31 /*
  32  * Modified 3/7/2001
  33  * - adapted for pip405, Denis Peter, MPL AG Switzerland
  34  * TODO:
  35  * clean-up
  36  */
  37
  38 #include <common.h>
  39 #include <ppc4xx.h>
  40 #include <asm/processor.h>
  41 #include "common_util.h"
  42
  43 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  44 /*-----------------------------------------------------------------------
  45  * Functions
  46  */
  47 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  48 static int write_word (flash_info_t *info, ulong dest, ulong data);
  49
  50 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt);
  51
  52
  53 #ifdef CONFIG_PIP405
  54 #define ADDR0           0x5555
  55 #define ADDR1           0x2aaa
  56 #define FLASH_WORD_SIZE unsigned short
  57 #endif
  58
  59 #ifdef CONFIG_MIP405
  60 #define ADDR0           0x5555
  61 #define ADDR1           0x2aaa
  62 #define FLASH_WORD_SIZE unsigned short
  63 #endif
  64
  65 #define FALSE           0
  66 #define TRUE            1
  67
  68 /*-----------------------------------------------------------------------
  69  */
  70
  71
  72 unsigned long flash_init (void)
  73 {
  74         unsigned long size_b0, size_b1;
  75         int i;
  76
  77         /* Since we are relocated, we can set-up the CS finally */
  78         setup_cs_reloc();
  79         /* get and display boot mode */
  80         i=get_boot_mode();
  81         if(i & BOOT_PCI)
  82                 printf("(PCI Boot %s Map) ",(i & BOOT_MPS) ?
  83                         "MPS" : "Flash");
  84         else
  85                 printf("(%s Boot) ",(i & BOOT_MPS) ?
  86                         "MPS" : "Flash");
  87         /* Init: no FLASHes known */
  88         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  89                 flash_info[i].flash_id = FLASH_UNKNOWN;
  90         }
  91
  92         /* Static FLASH Bank configuration here - FIXME XXX */
  93
  94         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  95
  96         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  97                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  98                         size_b0, size_b0<<20);
  99         }
 100         /* protect the bootloader */
 101         /* Monitor protection ON by default */
 102 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 103         flash_protect(FLAG_PROTECT_SET,
 104                         CFG_MONITOR_BASE,
 105                         CFG_MONITOR_BASE+monitor_flash_len-1,
 106                         &flash_info[0]);
 107 #endif
 108         /* protect reset vector */
 109         flash_info[0].protect[flash_info[0].sector_count-1] = 1;
 110         size_b1 = 0 ;
 111         flash_info[0].size = size_b0;
 112 #if 0
 113         /* include this if you want to test if
 114            the relocation has be done ok.
 115            This will disable both Chipselects */
 116         mtdcr (ebccfga, pb0cr);
 117         mtdcr (ebccfgd, 0L);
 118         mtdcr (ebccfga, pb1cr);
 119         mtdcr (ebccfgd, 0L);
 120         printf("CS0 & CS1 switched off for test\n");
 121 #endif
 122         return (size_b0);
 123 }
 124
 125
 126 /*-----------------------------------------------------------------------
 127  */
 128 void flash_print_info  (flash_info_t *info)
 129 {
 130         int i;
 131         int k;
 132         int size;
 133         int erased;
 134         volatile unsigned long *flash;
 135
 136         if (info->flash_id == FLASH_UNKNOWN) {
 137                 printf ("missing or unknown FLASH type\n");
 138                 return;
 139         }
 140
 141         switch (info->flash_id & FLASH_VENDMASK) {
 142         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 143         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 144         case FLASH_MAN_SST:     printf ("SST ");                break;
 145         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 146         default:                printf ("Unknown Vendor ");     break;
 147         }
 148
 149         switch (info->flash_id & FLASH_TYPEMASK) {
 150         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 151                                 break;
 152         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 153                                 break;
 154         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 155                                 break;
 156         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 157                                 break;
 158         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 159                                 break;
 160         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 161                                 break;
 162         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 163                                 break;
 164         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 165                                 break;
 166         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 167                                 break;
 168         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 169                                 break;
 170         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 171                                 break;
 172         case FLASH_INTEL320T:   printf ("TE28F320C3 (32 Mbit, top sector size)\n");
 173                                 break;
 174         default:                printf ("Unknown Chip Type\n");
 175                                 break;
 176         }
 177
 178         printf ("  Size: %ld KB in %d Sectors\n",
 179                 info->size >> 10, info->sector_count);
 180
 181         printf ("  Sector Start Addresses:");
 182         for (i=0; i<info->sector_count; ++i) {
 183                 /*
 184                  * Check if whole sector is erased
 185                 */
 186                 if (i != (info->sector_count-1))
 187                         size = info->start[i+1] - info->start[i];
 188                 else
 189                         size = info->start[0] + info->size - info->start[i];
 190                 erased = 1;
 191                 flash = (volatile unsigned long *)info->start[i];
 192                 size = size >> 2;        /* divide by 4 for longword access */
 193                 for (k=0; k<size; k++) {
 194                         if (*flash++ != 0xffffffff) {
 195                                 erased = 0;
 196                                 break;
 197                         }
 198                 }
 199                 if ((i % 5) == 0)
 200                         printf ("\n   ");
 201                 printf (" %08lX%s%s",
 202                         info->start[i],
 203                         erased ? " E" : "  ",
 204                         info->protect[i] ? "RO " : "   ");
 205         }
 206         printf ("\n");
 207 }
 208
 209 /*-----------------------------------------------------------------------
 210  */
 211
 212
 213 /*-----------------------------------------------------------------------
 214  */
 215
 216 /*
 217  * The following code cannot be run from FLASH!
 218  */
 219 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 220 {
 221         short i;
 222         FLASH_WORD_SIZE value;
 223         ulong base = (ulong)addr;
 224         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 225
 226         /* Write auto select command: read Manufacturer ID */
 227         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 228         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 229         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 230
 231         value = addr2[0];
 232         /*      printf("flash_get_size value: %x\n",value); */
 233         switch (value) {
 234         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 235                 info->flash_id = FLASH_MAN_AMD;
 236                 break;
 237         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 238                 info->flash_id = FLASH_MAN_FUJ;
 239                 break;
 240         case (FLASH_WORD_SIZE)INTEL_MANUFACT:
 241                 info->flash_id = FLASH_MAN_INTEL;
 242                 break;
 243         case (FLASH_WORD_SIZE)SST_MANUFACT:
 244                 info->flash_id = FLASH_MAN_SST;
 245                 break;
 246         default:
 247                 info->flash_id = FLASH_UNKNOWN;
 248                 info->sector_count = 0;
 249                 info->size = 0;
 250                 return (0);                     /* no or unknown flash  */
 251         }
 252         value = addr2[1];                       /* device ID            */
 253         /*      printf("Device value %x\n",value); */
 254         switch (value) {
 255         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 256                 info->flash_id += FLASH_AM040;
 257                 info->sector_count = 8;
 258                 info->size = 0x0080000; /* => 512 ko */
 259                 break;
 260         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 261                 info->flash_id += FLASH_AM400T;
 262                 info->sector_count = 11;
 263                 info->size = 0x00080000;
 264                 break;                          /* => 0.5 MB            */
 265
 266         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 267                 info->flash_id += FLASH_AM400B;
 268                 info->sector_count = 11;
 269                 info->size = 0x00080000;
 270                 break;                          /* => 0.5 MB            */
 271
 272         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 273                 info->flash_id += FLASH_AM800T;
 274                 info->sector_count = 19;
 275                 info->size = 0x00100000;
 276                 break;                          /* => 1 MB              */
 277
 278         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 279                 info->flash_id += FLASH_AM800B;
 280                 info->sector_count = 19;
 281                 info->size = 0x00100000;
 282                 break;                          /* => 1 MB              */
 283
 284         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 285                 info->flash_id += FLASH_AM160T;
 286                 info->sector_count = 35;
 287                 info->size = 0x00200000;
 288                 break;                          /* => 2 MB              */
 289
 290         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 291                 info->flash_id += FLASH_AM160B;
 292                 info->sector_count = 35;
 293                 info->size = 0x00200000;
 294                 break;                          /* => 2 MB              */
 295 #if 0   /* enable when device IDs are available */
 296         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 297                 info->flash_id += FLASH_AM320T;
 298                 info->sector_count = 67;
 299                 info->size = 0x00400000;
 300                 break;                          /* => 4 MB              */
 301
 302         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 303                 info->flash_id += FLASH_AM320B;
 304                 info->sector_count = 67;
 305                 info->size = 0x00400000;
 306                 break;                          /* => 4 MB              */
 307 #endif
 308         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 309                 info->flash_id += FLASH_SST800A;
 310                 info->sector_count = 16;
 311                 info->size = 0x00100000;
 312                 break;                          /* => 1 MB              */
 313         case (FLASH_WORD_SIZE)INTEL_ID_28F320C3T:
 314                 info->flash_id += FLASH_INTEL320T;
 315                 info->sector_count = 71;
 316                 info->size = 0x00400000;
 317                 break;                          /* => 4 MB              */
 318
 319
 320         case (FLASH_WORD_SIZE)SST_ID_xF160A:
 321                 info->flash_id += FLASH_SST160A;
 322                 info->sector_count = 32;
 323                 info->size = 0x00200000;
 324                 break;                          /* => 2 MB              */
 325
 326         default:
 327                 info->flash_id = FLASH_UNKNOWN;
 328                 return (0);                     /* => no or unknown flash */
 329
 330         }
 331
 332         /* set up sector start address table */
 333         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 334              (info->flash_id  == FLASH_AM040)){
 335                 for (i = 0; i < info->sector_count; i++)
 336                         info->start[i] = base + (i * 0x00010000);
 337         }
 338         else {
 339                 if (info->flash_id & FLASH_BTYPE) {
 340                         /* set sector offsets for bottom boot block type        */
 341                         info->start[0] = base + 0x00000000;
 342                         info->start[1] = base + 0x00004000;
 343                         info->start[2] = base + 0x00006000;
 344                         info->start[3] = base + 0x00008000;
 345                         for (i = 4; i < info->sector_count; i++)
 346                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 347                 }
 348                 else {
 349                         /* set sector offsets for top boot block type           */
 350                         i = info->sector_count - 1;
 351                         if(info->sector_count==71) {
 352
 353                                 info->start[i--] = base + info->size - 0x00002000;
 354                                 info->start[i--] = base + info->size - 0x00004000;
 355                                 info->start[i--] = base + info->size - 0x00006000;
 356                                 info->start[i--] = base + info->size - 0x00008000;
 357                                 info->start[i--] = base + info->size - 0x0000A000;
 358                                 info->start[i--] = base + info->size - 0x0000C000;
 359                                 info->start[i--] = base + info->size - 0x0000E000;
 360                                 for (; i >= 0; i--)
 361                                         info->start[i] = base + i * 0x000010000;
 362                         }
 363                         else {
 364                                 info->start[i--] = base + info->size - 0x00004000;
 365                                 info->start[i--] = base + info->size - 0x00006000;
 366                                 info->start[i--] = base + info->size - 0x00008000;
 367                                 for (; i >= 0; i--)
 368                                         info->start[i] = base + i * 0x00010000;
 369                         }
 370                 }
 371         }
 372
 373         /* check for protected sectors */
 374         for (i = 0; i < info->sector_count; i++) {
 375                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 376                 /* D0 = 1 if protected */
 377                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 378                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
 379                         info->protect[i] = 0;
 380                 else
 381                         info->protect[i] = addr2[2] & 1;
 382         }
 383
 384         /*
 385          * Prevent writes to uninitialized FLASH.
 386          */
 387         if (info->flash_id != FLASH_UNKNOWN) {
 388                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 389                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 390         }
 391         return (info->size);
 392 }
 393
 394
 395 int wait_for_DQ7(flash_info_t *info, int sect)
 396 {
 397         ulong start, now, last;
 398         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 399
 400         start = get_timer (0);
 401         last  = start;
 402         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 403                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 404                         printf ("Timeout\n");
 405                         return -1;
 406                 }
 407                 /* show that we're waiting */
 408                 if ((now - last) > 1000) {  /* every second */
 409                         putc ('.');
 410                         last = now;
 411                 }
 412         }
 413         return 0;
 414 }
 415
 416 int intel_wait_for_DQ7(flash_info_t *info, int sect)
 417 {
 418         ulong start, now, last;
 419         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 420
 421         start = get_timer (0);
 422         last  = start;
 423         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 424                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 425                         printf ("Timeout\n");
 426                         return -1;
 427                 }
 428                 /* show that we're waiting */
 429                 if ((now - last) > 1000) {  /* every second */
 430                         putc ('.');
 431                         last = now;
 432                 }
 433         }
 434         addr[0]=(FLASH_WORD_SIZE)0x00500050;
 435         return 0;
 436 }
 437
 438 /*-----------------------------------------------------------------------
 439  */
 440
 441 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 442 {
 443         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 444         volatile FLASH_WORD_SIZE *addr2;
 445         int flag, prot, sect, l_sect;
 446         int i;
 447
 448
 449         if ((s_first < 0) || (s_first > s_last)) {
 450                 if (info->flash_id == FLASH_UNKNOWN) {
 451                         printf ("- missing\n");
 452                 } else {
 453                         printf ("- no sectors to erase\n");
 454                 }
 455                 return 1;
 456         }
 457
 458         if (info->flash_id == FLASH_UNKNOWN) {
 459                 printf ("Can't erase unknown flash type - aborted\n");
 460                 return 1;
 461         }
 462
 463         prot = 0;
 464         for (sect=s_first; sect<=s_last; ++sect) {
 465                 if (info->protect[sect]) {
 466                         prot++;
 467                 }
 468         }
 469
 470         if (prot) {
 471                 printf ("- Warning: %d protected sectors will not be erased!\n",
 472                         prot);
 473         } else {
 474                 printf ("\n");
 475         }
 476
 477         l_sect = -1;
 478
 479         /* Disable interrupts which might cause a timeout here */
 480         flag = disable_interrupts();
 481
 482         /* Start erase on unprotected sectors */
 483         for (sect = s_first; sect<=s_last; sect++) {
 484                 if (info->protect[sect] == 0) { /* not protected */
 485                         addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 486                         /*  printf("Erasing sector %p\n", addr2); */ /* CLH */
 487                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 488                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 489                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 490                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 491                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 492                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 493                                 addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
 494                                 for (i=0; i<50; i++)
 495                                         udelay(1000);  /* wait 1 ms */
 496                                 wait_for_DQ7(info, sect);
 497                         }
 498                         else {
 499                                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 500                                         addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector */
 501                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 502                                         intel_wait_for_DQ7(info, sect);
 503                                         addr2[0] = (FLASH_WORD_SIZE)0x00200020;  /* sector erase */
 504                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 505                                         intel_wait_for_DQ7(info, sect);
 506                                 }
 507                                 else {
 508                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 509                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 510                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 511                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 512                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 513                                         addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 514                                         wait_for_DQ7(info, sect);
 515                                 }
 516                         }
 517                         l_sect = sect;
 518                         /*
 519                          * Wait for each sector to complete, it's more
 520                          * reliable.  According to AMD Spec, you must
 521                          * issue all erase commands within a specified
 522                          * timeout.  This has been seen to fail, especially
 523                          * if printf()s are included (for debug)!!
 524                          */
 525                         /*   wait_for_DQ7(info, sect); */
 526                 }
 527         }
 528
 529         /* re-enable interrupts if necessary */
 530         if (flag)
 531                 enable_interrupts();
 532
 533         /* wait at least 80us - let's wait 1 ms */
 534         udelay (1000);
 535
 536 #if 0
 537         /*
 538          * We wait for the last triggered sector
 539          */
 540         if (l_sect < 0)
 541                 goto DONE;
 542         wait_for_DQ7(info, l_sect);
 543
 544 DONE:
 545 #endif
 546         /* reset to read mode */
 547         addr = (FLASH_WORD_SIZE *)info->start[0];
 548         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */
 549
 550         printf (" done\n");
 551         return 0;
 552 }
 553
 554
 555 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt)
 556 {
 557         int i;
 558         volatile FLASH_WORD_SIZE *addr2;
 559         long c;
 560         c= (long)cnt;
 561         for(i=info->sector_count-1;i>0;i--)
 562         {
 563                 if(addr>=info->start[i])
 564                         break;
 565         }
 566         do {
 567                 addr2 = (FLASH_WORD_SIZE *)(info->start[i]);
 568                 addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector setup */
 569                 addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* unlock sector */
 570                 intel_wait_for_DQ7(info, i);
 571                 i++;
 572                 c-=(info->start[i]-info->start[i-1]);
 573         }while(c>0);
 574 }
 575
 576
 577 /*-----------------------------------------------------------------------
 578  * Copy memory to flash, returns:
 579  * 0 - OK
 580  * 1 - write timeout
 581  * 2 - Flash not erased
 582  */
 583
 584 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 585 {
 586         ulong cp, wp, data;
 587         int i, l, rc;
 588
 589         if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 590                 unlock_intel_sectors(info,addr,cnt);
 591         }
 592         wp = (addr & ~3);       /* get lower word aligned address */
 593         /*
 594          * handle unaligned start bytes
 595          */
 596         if ((l = addr - wp) != 0) {
 597                 data = 0;
 598                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 599                         data = (data << 8) | (*(uchar *)cp);
 600                 }
 601                 for (; i<4 && cnt>0; ++i) {
 602                         data = (data << 8) | *src++;
 603                         --cnt;
 604                         ++cp;
 605                 }
 606                 for (; cnt==0 && i<4; ++i, ++cp) {
 607                         data = (data << 8) | (*(uchar *)cp);
 608                 }
 609
 610                 if ((rc = write_word(info, wp, data)) != 0) {
 611                         return (rc);
 612                 }
 613                 wp += 4;
 614         }
 615
 616         /*
 617          * handle word aligned part
 618          */
 619         while (cnt >= 4) {
 620                 data = 0;
 621                 for (i=0; i<4; ++i) {
 622                         data = (data << 8) | *src++;
 623                 }
 624                 if ((rc = write_word(info, wp, data)) != 0) {
 625                         return (rc);
 626                 }
 627                 wp  += 4;
 628                 if((wp % 0x10000)==0)
 629                         printf("."); /* show Progress */
 630                 cnt -= 4;
 631         }
 632
 633         if (cnt == 0) {
 634                 return (0);
 635         }
 636
 637         /*
 638          * handle unaligned tail bytes
 639          */
 640         data = 0;
 641         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 642                 data = (data << 8) | *src++;
 643                 --cnt;
 644         }
 645         for (; i<4; ++i, ++cp) {
 646                 data = (data << 8) | (*(uchar *)cp);
 647         }
 648         rc=write_word(info, wp, data);
 649         return rc;
 650 }
 651
 652 /*-----------------------------------------------------------------------
 653  * Write a word to Flash, returns:
 654  * 0 - OK
 655  * 1 - write timeout
 656  * 2 - Flash not erased
 657  */
 658 static FLASH_WORD_SIZE *read_val = (FLASH_WORD_SIZE *)0x200000;
 659
 660 static int write_word (flash_info_t *info, ulong dest, ulong data)
 661 {
 662         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
 663         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
 664         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
 665         ulong start;
 666         int flag;
 667         int i;
 668
 669         /* Check if Flash is (sufficiently) erased */
 670         if ((*((volatile FLASH_WORD_SIZE *)dest) &
 671                 (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
 672                 return (2);
 673         }
 674         /* Disable interrupts which might cause a timeout here */
 675         flag = disable_interrupts();
 676         for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
 677         {
 678                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 679                         /* intel style writting */
 680                         dest2[i] = (FLASH_WORD_SIZE)0x00500050;
 681                         dest2[i] = (FLASH_WORD_SIZE)0x00400040;
 682                         *read_val++ = data2[i];
 683                         dest2[i] = data2[i];
 684                         if (flag)
 685                                 enable_interrupts();
 686                         /* data polling for D7 */
 687                         start = get_timer (0);
 688                         udelay(10);
 689                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080)
 690                         {
 691                                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
 692                                         return (1);
 693                         }
 694                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 695                         udelay(10);
 696                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 697                         if(dest2[i]!=data2[i])
 698                                 printf("Error at %p 0x%04X != 0x%04X\n",&dest2[i],dest2[i],data2[i]);
 699                 }
 700                 else {
 701                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 702                         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 703                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
 704                         dest2[i] = data2[i];
 705                         /* re-enable interrupts if necessary */
 706                         if (flag)
 707                                 enable_interrupts();
 708                         /* data polling for D7 */
 709                         start = get_timer (0);
 710                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
 711                                 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
 712                                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 713                                         return (1);
 714                                 }
 715                         }
 716                 }
 717         }
 718         return (0);
 719 }
 720
 721 /*-----------------------------------------------------------------------
 722  */