board/dave/common/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.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 #include <common.h>
  25 #include <asm/processor.h>
  26
  27 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  28
  29 /*-----------------------------------------------------------------------
  30  * Functions
  31  */
  32 static int write_word (flash_info_t *info, ulong dest, ulong data);
  33
  34 /*-----------------------------------------------------------------------
  35  */
  36 static void flash_get_offsets (ulong base, flash_info_t *info)
  37 {
  38         int i;
  39         short n;
  40
  41         /* set up sector start address table */
  42         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
  43             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
  44             for (i = 0; i < info->sector_count; i++)
  45                 info->start[i] = base + (i * 0x00010000);
  46         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
  47                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
  48                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
  49                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
  50                 /* set sector offsets for bottom boot block type        */
  51                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
  52                         info->start[i] = base;
  53                         base += 8 << 10;
  54                 }
  55                 while (i < info->sector_count) {        /* 64k regular sectors  */
  56                         info->start[i] = base;
  57                         base += 64 << 10;
  58                         ++i;
  59                 }
  60         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
  61                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
  62                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
  63                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
  64                 /* set sector offsets for top boot block type           */
  65                 base += info->size;
  66                 i = info->sector_count;
  67                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
  68                         base -= 8 << 10;
  69                         --i;
  70                         info->start[i] = base;
  71                 }
  72                 while (i > 0) {                 /* 64k regular sectors  */
  73                         base -= 64 << 10;
  74                         --i;
  75                         info->start[i] = base;
  76                 }
  77         } else {
  78             if (info->flash_id & FLASH_BTYPE) {
  79                 /* set sector offsets for bottom boot block type        */
  80                 info->start[0] = base + 0x00000000;
  81                 info->start[1] = base + 0x00004000;
  82                 info->start[2] = base + 0x00006000;
  83                 info->start[3] = base + 0x00008000;
  84                 for (i = 4; i < info->sector_count; i++) {
  85                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
  86                 }
  87             } else {
  88                 /* set sector offsets for top boot block type           */
  89                 i = info->sector_count - 1;
  90                 info->start[i--] = base + info->size - 0x00004000;
  91                 info->start[i--] = base + info->size - 0x00006000;
  92                 info->start[i--] = base + info->size - 0x00008000;
  93                 for (; i >= 0; i--) {
  94                         info->start[i] = base + i * 0x00010000;
  95                 }
  96             }
  97         }
  98 }
  99
 100 /*-----------------------------------------------------------------------
 101  */
 102 void flash_print_info  (flash_info_t *info)
 103 {
 104         int i;
 105         int k;
 106         int size;
 107         int erased;
 108         volatile unsigned long *flash;
 109
 110         if (info->flash_id == FLASH_UNKNOWN) {
 111                 printf ("missing or unknown FLASH type\n");
 112                 return;
 113         }
 114
 115         switch (info->flash_id & FLASH_VENDMASK) {
 116         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 117         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 118         case FLASH_MAN_SST:     printf ("SST ");                break;
 119         case FLASH_MAN_STM:     printf ("ST  ");                break;
 120         default:                printf ("Unknown Vendor ");     break;
 121         }
 122
 123         switch (info->flash_id & FLASH_TYPEMASK) {
 124         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 125                                 break;
 126         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 127                                 break;
 128         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 129                                 break;
 130         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 131                                 break;
 132         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 133                                 break;
 134         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 135                                 break;
 136         case FLASH_AM320T:      printf ("AM29LV320T (32 M, top sector)\n");
 137                                 break;
 138         case FLASH_AM320B:      printf ("AM29LV320B (32 M, bottom sector)\n");
 139                                 break;
 140         case FLASH_AMDL322T:    printf ("AM29DL322T (32 M, top sector)\n");
 141                                 break;
 142         case FLASH_AMDL322B:    printf ("AM29DL322B (32 M, bottom sector)\n");
 143                                 break;
 144         case FLASH_AMDL323T:    printf ("AM29DL323T (32 M, top sector)\n");
 145                                 break;
 146         case FLASH_AMDL323B:    printf ("AM29DL323B (32 M, bottom sector)\n");
 147                                 break;
 148         case FLASH_AM640U:      printf ("AM29LV640D (64 M, uniform sector)\n");
 149                                 break;
 150         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 151                                 break;
 152         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 153                                 break;
 154         case FLASH_STMW320DT:   printf ("M29W320DT (32 M, top sector)\n");
 155                                 break;
 156         default:                printf ("Unknown Chip Type\n");
 157                                 break;
 158         }
 159
 160         printf ("  Size: %ld MB in %d Sectors\n",
 161                 info->size >> 20, info->sector_count);
 162
 163         printf ("  Sector Start Addresses:");
 164         for (i=0; i<info->sector_count; ++i) {
 165 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
 166                 /*
 167                  * Check if whole sector is erased
 168                  */
 169                 if (i != (info->sector_count-1))
 170                   size = info->start[i+1] - info->start[i];
 171                 else
 172                   size = info->start[0] + info->size - info->start[i];
 173                 erased = 1;
 174                 flash = (volatile unsigned long *)info->start[i];
 175                 size = size >> 2;        /* divide by 4 for longword access */
 176                 for (k=0; k<size; k++)
 177                   {
 178                     if (*flash++ != 0xffffffff)
 179                       {
 180                         erased = 0;
 181                         break;
 182                       }
 183                   }
 184
 185                 if ((i % 5) == 0)
 186                         printf ("\n   ");
 187                 /* print empty and read-only info */
 188                 printf (" %08lX%s%s",
 189                         info->start[i],
 190                         erased ? " E" : "  ",
 191                         info->protect[i] ? "RO " : "   ");
 192 #else
 193                 if ((i % 5) == 0)
 194                         printf ("\n   ");
 195                 printf (" %08lX%s",
 196                         info->start[i],
 197                         info->protect[i] ? " (RO)" : "     ");
 198 #endif
 199
 200         }
 201         printf ("\n");
 202         return;
 203 }
 204
 205 /*-----------------------------------------------------------------------
 206  */
 207
 208
 209 /*-----------------------------------------------------------------------
 210  */
 211
 212 /*
 213  * The following code cannot be run from FLASH!
 214  */
 215 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 216 {
 217         short i;
 218         short n;
 219         CONFIG_SYS_FLASH_WORD_SIZE value;
 220         ulong base = (ulong)addr;
 221         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)addr;
 222
 223         debug("[%s, %d] Entering ...\n", __FUNCTION__, __LINE__);
 224
 225         /* Write auto select command: read Manufacturer ID */
 226         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 227         addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 228         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00900090;
 229
 230         value = addr2[CONFIG_SYS_FLASH_READ0];
 231
 232         switch (value) {
 233         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_MANUFACT:
 234                 info->flash_id = FLASH_MAN_AMD;
 235                 break;
 236         case (CONFIG_SYS_FLASH_WORD_SIZE)FUJ_MANUFACT:
 237                 info->flash_id = FLASH_MAN_FUJ;
 238                 break;
 239         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_MANUFACT:
 240                 info->flash_id = FLASH_MAN_SST;
 241                 break;
 242         case (CONFIG_SYS_FLASH_WORD_SIZE)STM_MANUFACT:
 243                 info->flash_id = FLASH_MAN_STM;
 244                 break;
 245         default:
 246                 info->flash_id = FLASH_UNKNOWN;
 247                 info->sector_count = 0;
 248                 info->size = 0;
 249                 return (0);                     /* no or unknown flash  */
 250         }
 251
 252         value = addr2[CONFIG_SYS_FLASH_READ1];          /* device ID            */
 253
 254         switch (value) {
 255         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400T:
 256                 info->flash_id += FLASH_AM400T;
 257                 info->sector_count = 11;
 258                 info->size = 0x00080000;
 259                 break;                          /* => 0.5 MB            */
 260
 261         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400B:
 262                 info->flash_id += FLASH_AM400B;
 263                 info->sector_count = 11;
 264                 info->size = 0x00080000;
 265                 break;                          /* => 0.5 MB            */
 266
 267         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800T:
 268                 info->flash_id += FLASH_AM800T;
 269                 info->sector_count = 19;
 270                 info->size = 0x00100000;
 271                 break;                          /* => 1 MB              */
 272
 273         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800B:
 274                 info->flash_id += FLASH_AM800B;
 275                 info->sector_count = 19;
 276                 info->size = 0x00100000;
 277                 break;                          /* => 1 MB              */
 278
 279         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160T:
 280                 info->flash_id += FLASH_AM160T;
 281                 info->sector_count = 35;
 282                 info->size = 0x00200000;
 283                 break;                          /* => 2 MB              */
 284
 285         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160B:
 286                 info->flash_id += FLASH_AM160B;
 287                 info->sector_count = 35;
 288                 info->size = 0x00200000;
 289                 break;                          /* => 2 MB              */
 290
 291         case (CONFIG_SYS_FLASH_WORD_SIZE)STM_ID_29W320DT:
 292                 info->flash_id += FLASH_STMW320DT;
 293                 info->sector_count = 67;
 294                 info->size = 0x00400000;  break;        /* => 4 MB      */
 295
 296         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
 297                 info->flash_id += FLASH_AM320T;
 298                 info->sector_count = 71;
 299                 info->size = 0x00400000;  break;        /* => 4 MB      */
 300
 301         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
 302                 info->flash_id += FLASH_AM320B;
 303                 info->sector_count = 71;
 304                 info->size = 0x00400000;  break;        /* => 4 MB      */
 305
 306         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322T:
 307                 info->flash_id += FLASH_AMDL322T;
 308                 info->sector_count = 71;
 309                 info->size = 0x00400000;  break;        /* => 4 MB      */
 310
 311         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322B:
 312                 info->flash_id += FLASH_AMDL322B;
 313                 info->sector_count = 71;
 314                 info->size = 0x00400000;  break;        /* => 4 MB      */
 315
 316         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323T:
 317                 info->flash_id += FLASH_AMDL323T;
 318                 info->sector_count = 71;
 319                 info->size = 0x00400000;  break;        /* => 4 MB      */
 320
 321         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323B:
 322                 info->flash_id += FLASH_AMDL323B;
 323                 info->sector_count = 71;
 324                 info->size = 0x00400000;  break;        /* => 4 MB      */
 325
 326         case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV640U:
 327                 info->flash_id += FLASH_AM640U;
 328                 info->sector_count = 128;
 329                 info->size = 0x00800000;  break;        /* => 8 MB      */
 330
 331         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF800A:
 332                 info->flash_id += FLASH_SST800A;
 333                 info->sector_count = 16;
 334                 info->size = 0x00100000;
 335                 break;                          /* => 1 MB              */
 336
 337         case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF160A:
 338                 info->flash_id += FLASH_SST160A;
 339                 info->sector_count = 32;
 340                 info->size = 0x00200000;
 341                 break;                          /* => 2 MB              */
 342
 343         default:
 344                 info->flash_id = FLASH_UNKNOWN;
 345                 return (0);                     /* => no or unknown flash */
 346
 347         }
 348
 349         /* set up sector start address table */
 350         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 351             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
 352             for (i = 0; i < info->sector_count; i++)
 353                 info->start[i] = base + (i * 0x00010000);
 354         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
 355                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
 356                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 357                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
 358                 /* set sector offsets for bottom boot block type        */
 359                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
 360                         info->start[i] = base;
 361                         base += 8 << 10;
 362                 }
 363                 while (i < info->sector_count) {        /* 64k regular sectors  */
 364                         info->start[i] = base;
 365                         base += 64 << 10;
 366                         ++i;
 367                 }
 368         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
 369                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
 370                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 371                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
 372                 /* set sector offsets for top boot block type           */
 373                 base += info->size;
 374                 i = info->sector_count;
 375                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
 376                         base -= 8 << 10;
 377                         --i;
 378                         info->start[i] = base;
 379                 }
 380                 while (i > 0) {                 /* 64k regular sectors  */
 381                         base -= 64 << 10;
 382                         --i;
 383                         info->start[i] = base;
 384                 }
 385         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT) {
 386                 /* set sector offsets for top boot block type           */
 387                 base += info->size;
 388                 i = info->sector_count;
 389                 /*  1 x 16k boot sector */
 390                 base -= 16 << 10;
 391                 --i;
 392                 info->start[i] = base;
 393                 /*  2 x 8k  boot sectors */
 394                 for (n=0; n<2; ++n) {
 395                         base -= 8 << 10;
 396                         --i;
 397                         info->start[i] = base;
 398                 }
 399                 /*  1 x 32k boot sector */
 400                 base -= 32 << 10;
 401                 --i;
 402                 info->start[i] = base;
 403
 404                 while (i > 0) {                 /* 64k regular sectors  */
 405                         base -= 64 << 10;
 406                         --i;
 407                         info->start[i] = base;
 408                 }
 409         } else {
 410             if (info->flash_id & FLASH_BTYPE) {
 411                 /* set sector offsets for bottom boot block type        */
 412                 info->start[0] = base + 0x00000000;
 413                 info->start[1] = base + 0x00004000;
 414                 info->start[2] = base + 0x00006000;
 415                 info->start[3] = base + 0x00008000;
 416                 for (i = 4; i < info->sector_count; i++) {
 417                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 418                 }
 419             } else {
 420                 /* set sector offsets for top boot block type           */
 421                 i = info->sector_count - 1;
 422                 info->start[i--] = base + info->size - 0x00004000;
 423                 info->start[i--] = base + info->size - 0x00006000;
 424                 info->start[i--] = base + info->size - 0x00008000;
 425                 for (; i >= 0; i--) {
 426                         info->start[i] = base + i * 0x00010000;
 427                 }
 428             }
 429         }
 430
 431         /* check for protected sectors */
 432         for (i = 0; i < info->sector_count; i++) {
 433                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 434                 /* D0 = 1 if protected */
 435                 addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
 436                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 437                   info->protect[i] = 0;
 438                 else
 439                   info->protect[i] = addr2[CONFIG_SYS_FLASH_READ2] & 1;
 440         }
 441
 442         /*
 443          * Prevent writes to uninitialized FLASH.
 444          */
 445         if (info->flash_id != FLASH_UNKNOWN) {
 446                 addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
 447                 *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;        /* reset bank */
 448         }
 449
 450         return (info->size);
 451 }
 452
 453
 454 /*-----------------------------------------------------------------------
 455  */
 456
 457 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 458 {
 459         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
 460         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
 461         int flag, prot, sect, l_sect;
 462         ulong start, now, last;
 463         int i;
 464
 465         if ((s_first < 0) || (s_first > s_last)) {
 466                 if (info->flash_id == FLASH_UNKNOWN) {
 467                         printf ("- missing\n");
 468                 } else {
 469                         printf ("- no sectors to erase\n");
 470                 }
 471                 return 1;
 472         }
 473
 474         if (info->flash_id == FLASH_UNKNOWN) {
 475                 printf ("Can't erase unknown flash type - aborted\n");
 476                 return 1;
 477         }
 478
 479         prot = 0;
 480         for (sect=s_first; sect<=s_last; ++sect) {
 481                 if (info->protect[sect]) {
 482                         prot++;
 483                 }
 484         }
 485
 486         if (prot) {
 487                 printf ("- Warning: %d protected sectors will not be erased!\n",
 488                         prot);
 489         } else {
 490                 printf ("\n");
 491         }
 492
 493         l_sect = -1;
 494
 495         /* Disable interrupts which might cause a timeout here */
 496         flag = disable_interrupts();
 497
 498         /* Start erase on unprotected sectors */
 499         for (sect = s_first; sect<=s_last; sect++) {
 500                 if (info->protect[sect] == 0) { /* not protected */
 501                     addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[sect]);
 502                     if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 503                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 504                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 505                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
 506                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 507                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 508                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00500050;  /* block erase */
 509                         for (i=0; i<50; i++)
 510                           udelay(1000);  /* wait 1 ms */
 511                     } else {
 512                         if (sect == s_first) {
 513                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 514                             addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 515                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
 516                             addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 517                             addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 518                         }
 519                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 520                     }
 521                     l_sect = sect;
 522                 }
 523         }
 524
 525         /* re-enable interrupts if necessary */
 526         if (flag)
 527                 enable_interrupts();
 528
 529         /* wait at least 80us - let's wait 1 ms */
 530         udelay (1000);
 531
 532         /*
 533          * We wait for the last triggered sector
 534          */
 535         if (l_sect < 0)
 536                 goto DONE;
 537
 538         start = get_timer (0);
 539         last  = start;
 540         addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[l_sect]);
 541         while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) != (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
 542                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 543                         printf ("Timeout\n");
 544                         return 1;
 545                 }
 546                 /* show that we're waiting */
 547                 if ((now - last) > 1000) {      /* every second */
 548                         putc ('.');
 549                         last = now;
 550                 }
 551         }
 552
 553 DONE:
 554         /* reset to read mode */
 555         addr = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
 556         addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0;       /* reset bank */
 557
 558         printf (" done\n");
 559         return 0;
 560 }
 561
 562 /*-----------------------------------------------------------------------
 563  * Copy memory to flash, returns:
 564  * 0 - OK
 565  * 1 - write timeout
 566  * 2 - Flash not erased
 567  */
 568
 569 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 570 {
 571         ulong cp, wp, data;
 572         int i, l, rc;
 573
 574         wp = (addr & ~3);       /* get lower word aligned address */
 575
 576         /*
 577          * handle unaligned start bytes
 578          */
 579         if ((l = addr - wp) != 0) {
 580                 data = 0;
 581                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 582 #ifdef CONFIG_B2
 583                         data = data | ((*(uchar *)cp)<<(8*i));
 584 #else
 585                         data = (data << 8) | (*(uchar *)cp);
 586 #endif
 587                 }
 588                 for (; i<4 && cnt>0; ++i) {
 589 #ifdef CONFIG_B2
 590                         data = data  | ((*src++)<<(8*i));
 591 #else
 592                         data = (data << 8) | *src++;
 593 #endif
 594                         --cnt;
 595                         ++cp;
 596                 }
 597                 for (; cnt==0 && i<4; ++i, ++cp) {
 598 #ifdef CONFIG_B2
 599                         data = data | ((*(uchar *)cp)<<(8*i));
 600 #else
 601                         data = (data << 8) | (*(uchar *)cp);
 602 #endif
 603                 }
 604
 605                 if ((rc = write_word(info, wp, data)) != 0) {
 606                         return (rc);
 607                 }
 608                 wp += 4;
 609         }
 610
 611         /*
 612          * handle word aligned part
 613          */
 614         while (cnt >= 4) {
 615                 data = 0;
 616 #ifdef CONFIG_B2
 617                 data = (*(ulong*)src);
 618                 src += 4;
 619 #else
 620                 for (i=0; i<4; ++i) {
 621                         data = (data << 8) | *src++;
 622                 }
 623 #endif
 624                 if ((rc = write_word(info, wp, data)) != 0) {
 625                         return (rc);
 626                 }
 627                 wp  += 4;
 628                 cnt -= 4;
 629         }
 630
 631         if (cnt == 0) {
 632                 return (0);
 633         }
 634
 635         /*
 636          * handle unaligned tail bytes
 637          */
 638         data = 0;
 639         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 640 #ifdef CONFIG_B2
 641                 data = data  | ((*src++)<<(8*i));
 642 #else
 643                 data = (data << 8) | *src++;
 644 #endif
 645                 --cnt;
 646         }
 647         for (; i<4; ++i, ++cp) {
 648 #ifdef CONFIG_B2
 649                 data = data | ((*(uchar *)cp)<<(8*i));
 650 #else
 651                 data = (data << 8) | (*(uchar *)cp);
 652 #endif
 653         }
 654
 655         return (write_word(info, wp, data));
 656 }
 657
 658 /*-----------------------------------------------------------------------
 659  * Write a word to Flash, returns:
 660  * 0 - OK
 661  * 1 - write timeout
 662  * 2 - Flash not erased
 663  */
 664 static int write_word (flash_info_t *info, ulong dest, ulong data)
 665 {
 666         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
 667         volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *)dest;
 668         volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 = (CONFIG_SYS_FLASH_WORD_SIZE *)&data;
 669         ulong start;
 670         int flag;
 671         int i;
 672
 673         /* Check if Flash is (sufficiently) erased */
 674         if ((*((volatile ulong *)dest) & data) != data) {
 675                 return (2);
 676         }
 677         /* Disable interrupts which might cause a timeout here */
 678         flag = disable_interrupts();
 679
 680         for (i=0; i<4/sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++)
 681           {
 682             addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
 683             addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
 684             addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00A000A0;
 685
 686             dest2[i] = data2[i];
 687
 688             /* re-enable interrupts if necessary */
 689             if (flag)
 690               enable_interrupts();
 691
 692             /* data polling for D7 */
 693             start = get_timer (0);
 694             while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
 695                    (data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080)) {
 696               if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 697                 return (1);
 698               }
 699             }
 700           }
 701
 702         return (0);
 703 }
 704
 705 /*-----------------------------------------------------------------------
 706  */