git.sur5r.net Git - u-boot/blob - board/bubinga405ep/flash.c

   1 /*
   2  * (C) Copyright 2000
   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 #include <common.h>
  32 #include <ppc4xx.h>
  33 #include <asm/processor.h>
  34
  35 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  36
  37 /*-----------------------------------------------------------------------
  38  * Functions
  39  */
  40 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  41 static int write_word (flash_info_t *info, ulong dest, ulong data);
  42 static void flash_get_offsets (ulong base, flash_info_t *info);
  43
  44 #ifdef CONFIG_ADCIOP
  45 #define ADDR0           0x0aa9
  46 #define ADDR1           0x0556
  47 #define FLASH_WORD_SIZE unsigned char
  48 #endif
  49
  50 #ifdef CONFIG_CPCI405
  51 #define ADDR0           0x5555
  52 #define ADDR1           0x2aaa
  53 #define FLASH_WORD_SIZE unsigned short
  54 #endif
  55
  56 #ifdef CONFIG_WALNUT405
  57 #define ADDR0           0x5555
  58 #define ADDR1           0x2aaa
  59 #define FLASH_WORD_SIZE unsigned char
  60 #endif
  61
  62 #ifdef CONFIG_BUBINGA405EP
  63 #define ADDR0           0x5555
  64 #define ADDR1           0x2aaa
  65 #define FLASH_WORD_SIZE unsigned char
  66 #endif
  67
  68
  69 /*-----------------------------------------------------------------------
  70  */
  71
  72 unsigned long flash_init (void)
  73 {
  74         unsigned long size_b0, size_b1;
  75         int i;
  76         uint pbcr;
  77         unsigned long base_b0, base_b1;
  78
  79         /* Init: no FLASHes known */
  80         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  81                 flash_info[i].flash_id = FLASH_UNKNOWN;
  82         }
  83
  84         /* Static FLASH Bank configuration here - FIXME XXX */
  85
  86         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  87
  88         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  89                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  90                         size_b0, size_b0<<20);
  91         }
  92
  93         /* Only one bank */
  94         if (CFG_MAX_FLASH_BANKS == 1)
  95           {
  96             /* Setup offsets */
  97             flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
  98
  99             /* Monitor protection ON by default */
 100             (void)flash_protect(FLAG_PROTECT_SET,
 101                                 FLASH_BASE0_PRELIM,
 102                                 FLASH_BASE0_PRELIM+CFG_MONITOR_LEN-1,
 103                                 &flash_info[0]);
 104             size_b1 = 0 ;
 105             flash_info[0].size = size_b0;
 106           }
 107
 108         /* 2 banks */
 109         else
 110           {
 111             size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
 112
 113             /* Re-do sizing to get full correct info */
 114
 115             if (size_b1)
 116               {
 117                 mtdcr(ebccfga, pb0cr);
 118                 pbcr = mfdcr(ebccfgd);
 119                 mtdcr(ebccfga, pb0cr);
 120                 base_b1 = -size_b1;
 121                 pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
 122                 mtdcr(ebccfgd, pbcr);
 123                 /*          printf("pb1cr = %x\n", pbcr); */
 124               }
 125
 126             if (size_b0)
 127               {
 128                 mtdcr(ebccfga, pb1cr);
 129                 pbcr = mfdcr(ebccfgd);
 130                 mtdcr(ebccfga, pb1cr);
 131                 base_b0 = base_b1 - size_b0;
 132                 pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
 133                 mtdcr(ebccfgd, pbcr);
 134                 /*            printf("pb0cr = %x\n", pbcr); */
 135               }
 136
 137             size_b0 = flash_get_size((vu_long *)base_b0, &flash_info[0]);
 138
 139             flash_get_offsets (base_b0, &flash_info[0]);
 140
 141             /* monitor protection ON by default */
 142             (void)flash_protect(FLAG_PROTECT_SET,
 143                                 base_b0+size_b0-CFG_MONITOR_LEN,
 144                                 base_b0+size_b0-1,
 145                                 &flash_info[0]);
 146
 147             if (size_b1) {
 148               /* Re-do sizing to get full correct info */
 149               size_b1 = flash_get_size((vu_long *)base_b1, &flash_info[1]);
 150
 151               flash_get_offsets (base_b1, &flash_info[1]);
 152
 153               /* monitor protection ON by default */
 154               (void)flash_protect(FLAG_PROTECT_SET,
 155                                   base_b1+size_b1-CFG_MONITOR_LEN,
 156                                   base_b1+size_b1-1,
 157                                   &flash_info[1]);
 158               /* monitor protection OFF by default (one is enough) */
 159               (void)flash_protect(FLAG_PROTECT_CLEAR,
 160                                   base_b0+size_b0-CFG_MONITOR_LEN,
 161                                   base_b0+size_b0-1,
 162                                   &flash_info[0]);
 163             } else {
 164               flash_info[1].flash_id = FLASH_UNKNOWN;
 165               flash_info[1].sector_count = -1;
 166             }
 167
 168             flash_info[0].size = size_b0;
 169             flash_info[1].size = size_b1;
 170           }/* else 2 banks */
 171         return (size_b0 + size_b1);
 172 }
 173
 174
 175
 176 /*-----------------------------------------------------------------------
 177  */
 178 static void flash_get_offsets (ulong base, flash_info_t *info)
 179 {
 180         int i;
 181
 182         /* set up sector start address table */
 183         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 184             (info->flash_id  == FLASH_AM040)){
 185             for (i = 0; i < info->sector_count; i++)
 186                 info->start[i] = base + (i * 0x00010000);
 187         } else {
 188             if (info->flash_id & FLASH_BTYPE) {
 189                 /* set sector offsets for bottom boot block type        */
 190                 info->start[0] = base + 0x00000000;
 191                 info->start[1] = base + 0x00004000;
 192                 info->start[2] = base + 0x00006000;
 193                 info->start[3] = base + 0x00008000;
 194                 for (i = 4; i < info->sector_count; i++) {
 195                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 196                 }
 197             } else {
 198                 /* set sector offsets for top boot block type           */
 199                 i = info->sector_count - 1;
 200                 info->start[i--] = base + info->size - 0x00004000;
 201                 info->start[i--] = base + info->size - 0x00006000;
 202                 info->start[i--] = base + info->size - 0x00008000;
 203                 for (; i >= 0; i--) {
 204                         info->start[i] = base + i * 0x00010000;
 205                 }
 206             }
 207         }
 208 }
 209
 210 /*-----------------------------------------------------------------------
 211  */
 212 void flash_print_info  (flash_info_t *info)
 213 {
 214         int i;
 215         int k;
 216         int size;
 217         int erased;
 218         volatile unsigned long *flash;
 219
 220         if (info->flash_id == FLASH_UNKNOWN) {
 221                 printf ("missing or unknown FLASH type\n");
 222                 return;
 223         }
 224
 225         switch (info->flash_id & FLASH_VENDMASK) {
 226         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 227         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 228         case FLASH_MAN_SST:     printf ("SST ");                break;
 229         default:                printf ("Unknown Vendor ");     break;
 230         }
 231
 232         switch (info->flash_id & FLASH_TYPEMASK) {
 233         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 234                                 break;
 235         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 236                                 break;
 237         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 238                                 break;
 239         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 240                                 break;
 241         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 242                                 break;
 243         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 244                                 break;
 245         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 246                                 break;
 247         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 248                                 break;
 249         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 250                                 break;
 251         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 252                                 break;
 253         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 254                                 break;
 255         default:                printf ("Unknown Chip Type\n");
 256                                 break;
 257         }
 258
 259         printf ("  Size: %ld KB in %d Sectors\n",
 260                 info->size >> 10, info->sector_count);
 261
 262         printf ("  Sector Start Addresses:");
 263         for (i=0; i<info->sector_count; ++i) {
 264                 /*
 265                  * Check if whole sector is erased
 266                  */
 267                 if (i != (info->sector_count-1))
 268                   size = info->start[i+1] - info->start[i];
 269                 else
 270                   size = info->start[0] + info->size - info->start[i];
 271                 erased = 1;
 272                 flash = (volatile unsigned long *)info->start[i];
 273                 size = size >> 2;        /* divide by 4 for longword access */
 274                 for (k=0; k<size; k++)
 275                   {
 276                     if (*flash++ != 0xffffffff)
 277                       {
 278                         erased = 0;
 279                         break;
 280                       }
 281                   }
 282
 283                 if ((i % 5) == 0)
 284                         printf ("\n   ");
 285 #if 0 /* test-only */
 286                 printf (" %08lX%s",
 287                         info->start[i],
 288                         info->protect[i] ? " (RO)" : "     "
 289 #else
 290                 printf (" %08lX%s%s",
 291                         info->start[i],
 292                         erased ? " E" : "  ",
 293                         info->protect[i] ? "RO " : "   "
 294 #endif
 295                 );
 296         }
 297         printf ("\n");
 298         return;
 299 }
 300
 301 /*-----------------------------------------------------------------------
 302  */
 303
 304
 305 /*-----------------------------------------------------------------------
 306  */
 307
 308 /*
 309  * The following code cannot be run from FLASH!
 310  */
 311 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 312 {
 313         short i;
 314         FLASH_WORD_SIZE value;
 315         ulong base = (ulong)addr;
 316         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 317
 318         /* Write auto select command: read Manufacturer ID */
 319         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 320         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 321         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 322
 323 #ifdef CONFIG_ADCIOP
 324         value = addr2[2];
 325 #else
 326         value = addr2[0];
 327 #endif
 328
 329         switch (value) {
 330         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 331                 info->flash_id = FLASH_MAN_AMD;
 332                 break;
 333         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 334                 info->flash_id = FLASH_MAN_FUJ;
 335                 break;
 336         case (FLASH_WORD_SIZE)SST_MANUFACT:
 337                 info->flash_id = FLASH_MAN_SST;
 338                 break;
 339         default:
 340                 info->flash_id = FLASH_UNKNOWN;
 341                 info->sector_count = 0;
 342                 info->size = 0;
 343                 return (0);                     /* no or unknown flash  */
 344         }
 345
 346 #ifdef CONFIG_ADCIOP
 347         value = addr2[0];                       /* device ID            */
 348         /*        printf("\ndev_code=%x\n", value); */
 349 #else
 350         value = addr2[1];                       /* device ID            */
 351 #endif
 352
 353         switch (value) {
 354         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 355                 info->flash_id += FLASH_AM040;
 356                 info->sector_count = 8;
 357                 info->size = 0x0080000; /* => 512 ko */
 358                 break;
 359         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 360                 info->flash_id += FLASH_AM400T;
 361                 info->sector_count = 11;
 362                 info->size = 0x00080000;
 363                 break;                          /* => 0.5 MB            */
 364
 365         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 366                 info->flash_id += FLASH_AM400B;
 367                 info->sector_count = 11;
 368                 info->size = 0x00080000;
 369                 break;                          /* => 0.5 MB            */
 370
 371         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 372                 info->flash_id += FLASH_AM800T;
 373                 info->sector_count = 19;
 374                 info->size = 0x00100000;
 375                 break;                          /* => 1 MB              */
 376
 377         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 378                 info->flash_id += FLASH_AM800B;
 379                 info->sector_count = 19;
 380                 info->size = 0x00100000;
 381                 break;                          /* => 1 MB              */
 382
 383         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 384                 info->flash_id += FLASH_AM160T;
 385                 info->sector_count = 35;
 386                 info->size = 0x00200000;
 387                 break;                          /* => 2 MB              */
 388
 389         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 390                 info->flash_id += FLASH_AM160B;
 391                 info->sector_count = 35;
 392                 info->size = 0x00200000;
 393                 break;                          /* => 2 MB              */
 394 #if 0   /* enable when device IDs are available */
 395         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 396                 info->flash_id += FLASH_AM320T;
 397                 info->sector_count = 67;
 398                 info->size = 0x00400000;
 399                 break;                          /* => 4 MB              */
 400
 401         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 402                 info->flash_id += FLASH_AM320B;
 403                 info->sector_count = 67;
 404                 info->size = 0x00400000;
 405                 break;                          /* => 4 MB              */
 406 #endif
 407         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 408                 info->flash_id += FLASH_SST800A;
 409                 info->sector_count = 16;
 410                 info->size = 0x00100000;
 411                 break;                          /* => 1 MB              */
 412
 413         case (FLASH_WORD_SIZE)SST_ID_xF160A:
 414                 info->flash_id += FLASH_SST160A;
 415                 info->sector_count = 32;
 416                 info->size = 0x00200000;
 417                 break;                          /* => 2 MB              */
 418
 419         default:
 420                 info->flash_id = FLASH_UNKNOWN;
 421                 return (0);                     /* => no or unknown flash */
 422
 423         }
 424
 425         /* set up sector start address table */
 426         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 427             (info->flash_id  == FLASH_AM040)){
 428             for (i = 0; i < info->sector_count; i++)
 429                 info->start[i] = base + (i * 0x00010000);
 430         } else {
 431             if (info->flash_id & FLASH_BTYPE) {
 432                 /* set sector offsets for bottom boot block type        */
 433                 info->start[0] = base + 0x00000000;
 434                 info->start[1] = base + 0x00004000;
 435                 info->start[2] = base + 0x00006000;
 436                 info->start[3] = base + 0x00008000;
 437                 for (i = 4; i < info->sector_count; i++) {
 438                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 439                 }
 440             } else {
 441                 /* set sector offsets for top boot block type           */
 442                 i = info->sector_count - 1;
 443                 info->start[i--] = base + info->size - 0x00004000;
 444                 info->start[i--] = base + info->size - 0x00006000;
 445                 info->start[i--] = base + info->size - 0x00008000;
 446                 for (; i >= 0; i--) {
 447                         info->start[i] = base + i * 0x00010000;
 448                 }
 449             }
 450         }
 451
 452         /* check for protected sectors */
 453         for (i = 0; i < info->sector_count; i++) {
 454                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 455                 /* D0 = 1 if protected */
 456 #ifdef CONFIG_ADCIOP
 457                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 458                 info->protect[i] = addr2[4] & 1;
 459 #else
 460                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 461                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 462                   info->protect[i] = 0;
 463                 else
 464                   info->protect[i] = addr2[2] & 1;
 465 #endif
 466         }
 467
 468         /*
 469          * Prevent writes to uninitialized FLASH.
 470          */
 471         if (info->flash_id != FLASH_UNKNOWN) {
 472 #if 0 /* test-only */
 473 #ifdef CONFIG_ADCIOP
 474                 addr2 = (volatile unsigned char *)info->start[0];
 475                 addr2[ADDR0] = 0xAA;
 476                 addr2[ADDR1] = 0x55;
 477                 addr2[ADDR0] = 0xF0;  /* reset bank */
 478 #else
 479                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 480                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 481 #endif
 482 #else /* test-only */
 483                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 484                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 485 #endif /* test-only */
 486         }
 487
 488         return (info->size);
 489 }
 490
 491 int wait_for_DQ7(flash_info_t *info, int sect)
 492 {
 493         ulong start, now, last;
 494         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 495
 496         start = get_timer (0);
 497     last  = start;
 498     while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 499         if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 500             printf ("Timeout\n");
 501             return -1;
 502         }
 503         /* show that we're waiting */
 504         if ((now - last) > 1000) {  /* every second */
 505             putc ('.');
 506             last = now;
 507         }
 508     }
 509         return 0;
 510 }
 511
 512 /*-----------------------------------------------------------------------
 513  */
 514
 515 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 516 {
 517         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 518         volatile FLASH_WORD_SIZE *addr2;
 519         int flag, prot, sect, l_sect;
 520         int i;
 521
 522         if ((s_first < 0) || (s_first > s_last)) {
 523                 if (info->flash_id == FLASH_UNKNOWN) {
 524                         printf ("- missing\n");
 525                 } else {
 526                         printf ("- no sectors to erase\n");
 527                 }
 528                 return 1;
 529         }
 530
 531         if (info->flash_id == FLASH_UNKNOWN) {
 532                 printf ("Can't erase unknown flash type - aborted\n");
 533                 return 1;
 534         }
 535
 536         prot = 0;
 537         for (sect=s_first; sect<=s_last; ++sect) {
 538                 if (info->protect[sect]) {
 539                         prot++;
 540                 }
 541         }
 542
 543         if (prot) {
 544                 printf ("- Warning: %d protected sectors will not be erased!\n",
 545                         prot);
 546         } else {
 547                 printf ("\n");
 548         }
 549
 550         l_sect = -1;
 551
 552         /* Disable interrupts which might cause a timeout here */
 553         flag = disable_interrupts();
 554
 555         /* Start erase on unprotected sectors */
 556         for (sect = s_first; sect<=s_last; sect++) {
 557                 if (info->protect[sect] == 0) { /* not protected */
 558                     addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 559                     printf("Erasing sector %p\n", addr2);       /* CLH */
 560
 561                     if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 562                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 563                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 564                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 565                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 566                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 567                         addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
 568                         for (i=0; i<50; i++)
 569                                 udelay(1000);  /* wait 1 ms */
 570                     } else {
 571                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 572                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 573                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 574                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 575                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 576                         addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 577                     }
 578                     l_sect = sect;
 579                     /*
 580                      * Wait for each sector to complete, it's more
 581                      * reliable.  According to AMD Spec, you must
 582                      * issue all erase commands within a specified
 583                      * timeout.  This has been seen to fail, especially
 584                      * if printf()s are included (for debug)!!
 585                      */
 586                     wait_for_DQ7(info, sect);
 587                 }
 588         }
 589
 590         /* re-enable interrupts if necessary */
 591         if (flag)
 592                 enable_interrupts();
 593
 594         /* wait at least 80us - let's wait 1 ms */
 595         udelay (1000);
 596
 597 #if 0
 598         /*
 599          * We wait for the last triggered sector
 600          */
 601         if (l_sect < 0)
 602                 goto DONE;
 603         wait_for_DQ7(info, l_sect);
 604
 605 DONE:
 606 #endif
 607         /* reset to read mode */
 608         addr = (FLASH_WORD_SIZE *)info->start[0];
 609         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */
 610
 611         printf (" done\n");
 612         return 0;
 613 }
 614
 615 /*-----------------------------------------------------------------------
 616  * Copy memory to flash, returns:
 617  * 0 - OK
 618  * 1 - write timeout
 619  * 2 - Flash not erased
 620  */
 621
 622 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 623 {
 624         ulong cp, wp, data;
 625         int i, l, rc;
 626
 627         wp = (addr & ~3);       /* get lower word aligned address */
 628
 629         /*
 630          * handle unaligned start bytes
 631          */
 632         if ((l = addr - wp) != 0) {
 633                 data = 0;
 634                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 635                         data = (data << 8) | (*(uchar *)cp);
 636                 }
 637                 for (; i<4 && cnt>0; ++i) {
 638                         data = (data << 8) | *src++;
 639                         --cnt;
 640                         ++cp;
 641                 }
 642                 for (; cnt==0 && i<4; ++i, ++cp) {
 643                         data = (data << 8) | (*(uchar *)cp);
 644                 }
 645
 646                 if ((rc = write_word(info, wp, data)) != 0) {
 647                         return (rc);
 648                 }
 649                 wp += 4;
 650         }
 651
 652         /*
 653          * handle word aligned part
 654          */
 655         while (cnt >= 4) {
 656                 data = 0;
 657                 for (i=0; i<4; ++i) {
 658                         data = (data << 8) | *src++;
 659                 }
 660                 if ((rc = write_word(info, wp, data)) != 0) {
 661                         return (rc);
 662                 }
 663                 wp  += 4;
 664                 cnt -= 4;
 665         }
 666
 667         if (cnt == 0) {
 668                 return (0);
 669         }
 670
 671         /*
 672          * handle unaligned tail bytes
 673          */
 674         data = 0;
 675         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 676                 data = (data << 8) | *src++;
 677                 --cnt;
 678         }
 679         for (; i<4; ++i, ++cp) {
 680                 data = (data << 8) | (*(uchar *)cp);
 681         }
 682
 683         return (write_word(info, wp, data));
 684 }
 685
 686 /*-----------------------------------------------------------------------
 687  * Write a word to Flash, returns:
 688  * 0 - OK
 689  * 1 - write timeout
 690  * 2 - Flash not erased
 691  */
 692 static int write_word (flash_info_t * info, ulong dest, ulong data)
 693 {
 694         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) (info->start[0]);
 695         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
 696         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
 697         ulong start;
 698         int i;
 699
 700         /* Check if Flash is (sufficiently) erased */
 701         if ((*((volatile FLASH_WORD_SIZE *) dest) &
 702             (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
 703                 return (2);
 704         }
 705
 706         for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
 707                 int flag;
 708
 709                 /* Disable interrupts which might cause a timeout here */
 710                 flag = disable_interrupts ();
 711
 712                 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 713                 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 714                 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
 715
 716                 dest2[i] = data2[i];
 717
 718                 /* re-enable interrupts if necessary */
 719                 if (flag)
 720                         enable_interrupts ();
 721
 722                 /* data polling for D7 */
 723                 start = get_timer (0);
 724                 while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
 725                        (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
 726
 727                         if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 728                                 return (1);
 729                         }
 730                 }
 731         }
 732
 733         return (0);
 734 }
 735
 736 /*-----------------------------------------------------------------------
 737  */