board/prodrive/common/flash.c

   1 /*
   2  * (C) Copyright 2006
   3  * Stefan Roese, DENX Software Engineering, sr@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 #include <common.h>
  25 #include <asm/processor.h>
  26
  27 flash_info_t    flash_info[CFG_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 void flash_print_info(flash_info_t *info)
  35 {
  36         int i;
  37         int k;
  38         int size;
  39         int erased;
  40         volatile unsigned long *flash;
  41
  42         if (info->flash_id == FLASH_UNKNOWN) {
  43                 printf ("missing or unknown FLASH type\n");
  44                 return;
  45         }
  46
  47         switch (info->flash_id & FLASH_VENDMASK) {
  48         case FLASH_MAN_AMD:     printf ("AMD ");                break;
  49         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
  50         case FLASH_MAN_SST:     printf ("SST ");                break;
  51         case FLASH_MAN_EXCEL:   printf ("Excel Semiconductor "); break;
  52         default:                printf ("Unknown Vendor ");     break;
  53         }
  54
  55         switch (info->flash_id & FLASH_TYPEMASK) {
  56         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
  57                 break;
  58         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
  59                 break;
  60         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
  61                 break;
  62         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
  63                 break;
  64         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
  65                 break;
  66         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
  67                 break;
  68         case FLASH_AM320T:      printf ("AM29LV320T (32 M, top sector)\n");
  69                 break;
  70         case FLASH_AM320B:      printf ("AM29LV320B (32 M, bottom sector)\n");
  71                 break;
  72         case FLASH_AMDL322T:    printf ("AM29DL322T (32 M, top sector)\n");
  73                 break;
  74         case FLASH_AMDL322B:    printf ("AM29DL322B (32 M, bottom sector)\n");
  75                 break;
  76         case FLASH_AMDL323T:    printf ("AM29DL323T (32 M, top sector)\n");
  77                 break;
  78         case FLASH_AMDL323B:    printf ("AM29DL323B (32 M, bottom sector)\n");
  79                 break;
  80         case FLASH_SST020:      printf ("SST39LF/VF020 (2 Mbit, uniform sector size)\n");
  81                 break;
  82         case FLASH_SST040:      printf ("SST39LF/VF040 (4 Mbit, uniform sector size)\n");
  83                 break;
  84         default:                printf ("Unknown Chip Type\n");
  85                 break;
  86         }
  87
  88         printf ("  Size: %ld MB in %d Sectors\n",
  89                 info->size >> 20, info->sector_count);
  90
  91         printf ("  Sector Start Addresses:");
  92         for (i=0; i<info->sector_count; ++i) {
  93 #ifdef CFG_FLASH_EMPTY_INFO
  94                 /*
  95                  * Check if whole sector is erased
  96                  */
  97                 if (i != (info->sector_count-1))
  98                         size = info->start[i+1] - info->start[i];
  99                 else
 100                         size = info->start[0] + info->size - info->start[i];
 101                 erased = 1;
 102                 flash = (volatile unsigned long *)info->start[i];
 103                 size = size >> 2;        /* divide by 4 for longword access */
 104                 for (k=0; k<size; k++) {
 105                         if (*flash++ != 0xffffffff) {
 106                                 erased = 0;
 107                                 break;
 108                         }
 109                 }
 110
 111                 if ((i % 5) == 0)
 112                         printf ("\n   ");
 113                 /* print empty and read-only info */
 114                 printf (" %08lX%s%s",
 115                         info->start[i],
 116                         erased ? " E" : "  ",
 117                         info->protect[i] ? "RO " : "   ");
 118 #else
 119                 if ((i % 5) == 0)
 120                         printf ("\n   ");
 121                 printf (" %08lX%s",
 122                         info->start[i],
 123                         info->protect[i] ? " (RO)" : "     ");
 124 #endif
 125
 126         }
 127         printf ("\n");
 128         return;
 129 }
 130
 131 /*
 132  * The following code cannot be run from FLASH!
 133  */
 134 static ulong flash_get_size(vu_long *addr, flash_info_t *info)
 135 {
 136         short i;
 137         short n;
 138         CFG_FLASH_WORD_SIZE value;
 139         ulong base = (ulong)addr;
 140         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)addr;
 141
 142         /* Write auto select command: read Manufacturer ID */
 143         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 144         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 145         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00900090;
 146
 147         value = addr2[CFG_FLASH_READ0];
 148
 149         switch (value) {
 150         case (CFG_FLASH_WORD_SIZE)AMD_MANUFACT:
 151                 info->flash_id = FLASH_MAN_AMD;
 152                 break;
 153         case (CFG_FLASH_WORD_SIZE)FUJ_MANUFACT:
 154                 info->flash_id = FLASH_MAN_FUJ;
 155                 break;
 156         case (CFG_FLASH_WORD_SIZE)SST_MANUFACT:
 157                 info->flash_id = FLASH_MAN_SST;
 158                 break;
 159         case (CFG_FLASH_WORD_SIZE)EXCEL_MANUFACT:
 160                 info->flash_id = FLASH_MAN_EXCEL;
 161                 break;
 162         default:
 163                 info->flash_id = FLASH_UNKNOWN;
 164                 info->sector_count = 0;
 165                 info->size = 0;
 166                 return (0);                     /* no or unknown flash  */
 167         }
 168
 169         value = addr2[CFG_FLASH_READ1];         /* device ID            */
 170
 171         switch (value) {
 172         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400T:
 173                 info->flash_id += FLASH_AM400T;
 174                 info->sector_count = 11;
 175                 info->size = 0x00080000;
 176                 break;                          /* => 0.5 MB            */
 177
 178         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV400B:
 179                 info->flash_id += FLASH_AM400B;
 180                 info->sector_count = 11;
 181                 info->size = 0x00080000;
 182                 break;                          /* => 0.5 MB            */
 183
 184         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800T:
 185                 info->flash_id += FLASH_AM800T;
 186                 info->sector_count = 19;
 187                 info->size = 0x00100000;
 188                 break;                          /* => 1 MB              */
 189
 190         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV800B:
 191                 info->flash_id += FLASH_AM800B;
 192                 info->sector_count = 19;
 193                 info->size = 0x00100000;
 194                 break;                          /* => 1 MB              */
 195
 196         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160T:
 197                 info->flash_id += FLASH_AM160T;
 198                 info->sector_count = 35;
 199                 info->size = 0x00200000;
 200                 break;                          /* => 2 MB              */
 201
 202         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV160B:
 203                 info->flash_id += FLASH_AM160B;
 204                 info->sector_count = 35;
 205                 info->size = 0x00200000;
 206                 break;                          /* => 2 MB              */
 207
 208         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
 209                 info->flash_id += FLASH_AM320T;
 210                 info->sector_count = 71;
 211                 info->size = 0x00400000;  break;        /* => 4 MB      */
 212
 213         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
 214                 info->flash_id += FLASH_AM320B;
 215                 info->sector_count = 71;
 216                 info->size = 0x00400000;  break;        /* => 4 MB      */
 217
 218         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322T:
 219                 info->flash_id += FLASH_AMDL322T;
 220                 info->sector_count = 71;
 221                 info->size = 0x00400000;  break;        /* => 4 MB      */
 222
 223         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL322B:
 224                 info->flash_id += FLASH_AMDL322B;
 225                 info->sector_count = 71;
 226                 info->size = 0x00400000;  break;        /* => 4 MB      */
 227
 228         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323T:
 229                 info->flash_id += FLASH_AMDL323T;
 230                 info->sector_count = 71;
 231                 info->size = 0x00400000;  break;        /* => 4 MB      */
 232
 233         case (CFG_FLASH_WORD_SIZE)AMD_ID_DL323B:
 234                 info->flash_id += FLASH_AMDL323B;
 235                 info->sector_count = 71;
 236                 info->size = 0x00400000;  break;        /* => 4 MB      */
 237
 238         case (CFG_FLASH_WORD_SIZE)SST_ID_xF020:
 239                 info->flash_id += FLASH_SST020;
 240                 info->sector_count = 64;
 241                 info->size = 0x00040000;
 242                 break;                          /* => 256 kB            */
 243
 244         case (CFG_FLASH_WORD_SIZE)SST_ID_xF040:
 245                 info->flash_id += FLASH_SST040;
 246                 info->sector_count = 128;
 247                 info->size = 0x00080000;
 248                 break;                          /* => 512 kB            */
 249
 250         default:
 251                 info->flash_id = FLASH_UNKNOWN;
 252                 return (0);                     /* => no or unknown flash */
 253
 254         }
 255
 256         /* set up sector start address table */
 257         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 258                 for (i = 0; i < info->sector_count; i++)
 259                         info->start[i] = base + (i * 0x00001000);
 260         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
 261                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
 262                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 263                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
 264                 /* set sector offsets for bottom boot block type        */
 265                 for (i=0; i<8; ++i) {           /*  8 x 8k boot sectors */
 266                         info->start[i] = base;
 267                         base += 8 << 10;
 268                 }
 269                 while (i < info->sector_count) {        /* 64k regular sectors  */
 270                         info->start[i] = base;
 271                         base += 64 << 10;
 272                         ++i;
 273                 }
 274         } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
 275                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
 276                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 277                    ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
 278                 /* set sector offsets for top boot block type           */
 279                 base += info->size;
 280                 i = info->sector_count;
 281                 for (n=0; n<8; ++n) {           /*  8 x 8k boot sectors */
 282                         base -= 8 << 10;
 283                         --i;
 284                         info->start[i] = base;
 285                 }
 286                 while (i > 0) {                 /* 64k regular sectors  */
 287                         base -= 64 << 10;
 288                         --i;
 289                         info->start[i] = base;
 290                 }
 291         } else {
 292                 if (info->flash_id & FLASH_BTYPE) {
 293                         /* set sector offsets for bottom boot block type        */
 294                         info->start[0] = base + 0x00000000;
 295                         info->start[1] = base + 0x00004000;
 296                         info->start[2] = base + 0x00006000;
 297                         info->start[3] = base + 0x00008000;
 298                         for (i = 4; i < info->sector_count; i++) {
 299                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 300                         }
 301                 } else {
 302                         /* set sector offsets for top boot block type           */
 303                         i = info->sector_count - 1;
 304                         info->start[i--] = base + info->size - 0x00004000;
 305                         info->start[i--] = base + info->size - 0x00006000;
 306                         info->start[i--] = base + info->size - 0x00008000;
 307                         for (; i >= 0; i--) {
 308                                 info->start[i] = base + i * 0x00010000;
 309                         }
 310                 }
 311         }
 312
 313         /* check for protected sectors */
 314         for (i = 0; i < info->sector_count; i++) {
 315                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 316                 /* D0 = 1 if protected */
 317                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 318                 if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)
 319                         info->protect[i] = 0;
 320                 else
 321                         info->protect[i] = addr2[CFG_FLASH_READ2] & 1;
 322         }
 323
 324         /*
 325          * Prevent writes to uninitialized FLASH.
 326          */
 327         if (info->flash_id != FLASH_UNKNOWN) {
 328                 addr2 = (CFG_FLASH_WORD_SIZE *)info->start[0];
 329                 *addr2 = (CFG_FLASH_WORD_SIZE)0x00F000F0;       /* reset bank */
 330         }
 331
 332         return (info->size);
 333 }
 334
 335
 336 int flash_erase(flash_info_t *info, int s_first, int s_last)
 337 {
 338         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *)(info->start[0]);
 339         volatile CFG_FLASH_WORD_SIZE *addr2;
 340         int flag, prot, sect, l_sect;
 341         ulong start, now, last;
 342
 343         if ((s_first < 0) || (s_first > s_last)) {
 344                 if (info->flash_id == FLASH_UNKNOWN)
 345                         printf ("- missing\n");
 346                 else
 347                         printf ("- no sectors to erase\n");
 348                 return 1;
 349         }
 350
 351         if (info->flash_id == FLASH_UNKNOWN) {
 352                 printf ("Can't erase unknown flash type - aborted\n");
 353                 return 1;
 354         }
 355
 356         prot = 0;
 357         for (sect=s_first; sect<=s_last; ++sect)
 358                 if (info->protect[sect])
 359                         prot++;
 360
 361         if (prot)
 362                 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 363         else
 364                 printf ("\n");
 365
 366         l_sect = -1;
 367
 368         /* Disable interrupts which might cause a timeout here */
 369         flag = disable_interrupts();
 370
 371         /* Start erase on unprotected sectors */
 372         for (sect = s_first; sect<=s_last; sect++) {
 373                 if (info->protect[sect] == 0) { /* not protected */
 374                         addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[sect]);
 375                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 376                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 377                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 378                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
 379                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 380                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 381                                 addr2[0] = (CFG_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 382
 383                                 /* re-enable interrupts if necessary */
 384                                 if (flag) {
 385                                         enable_interrupts();
 386                                         flag = 0;
 387                                 }
 388
 389                                 /* data polling for D7 */
 390                                 start = get_timer (0);
 391                                 while ((addr2[0] & (CFG_FLASH_WORD_SIZE)0x00800080) !=
 392                                        (CFG_FLASH_WORD_SIZE)0x00800080) {
 393                                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
 394                                                 return (1);
 395                                 }
 396                         } else {
 397                                 if (sect == s_first) {
 398                                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 399                                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 400                                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
 401                                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 402                                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 403                                 }
 404                                 addr2[0] = (CFG_FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 405                         }
 406                         l_sect = sect;
 407                 }
 408         }
 409
 410         /* re-enable interrupts if necessary */
 411         if (flag)
 412                 enable_interrupts();
 413
 414         /* wait at least 80us - let's wait 1 ms */
 415         udelay (1000);
 416
 417         /*
 418          * We wait for the last triggered sector
 419          */
 420         if (l_sect < 0)
 421                 goto DONE;
 422
 423         start = get_timer (0);
 424         last  = start;
 425         addr = (CFG_FLASH_WORD_SIZE *)(info->start[l_sect]);
 426         while ((addr[0] & (CFG_FLASH_WORD_SIZE)0x00800080) != (CFG_FLASH_WORD_SIZE)0x00800080) {
 427                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 428                         printf ("Timeout\n");
 429                         return 1;
 430                 }
 431                 /* show that we're waiting */
 432                 if ((now - last) > 1000) {      /* every second */
 433                         putc ('.');
 434                         last = now;
 435                 }
 436         }
 437
 438 DONE:
 439         /* reset to read mode */
 440         addr = (CFG_FLASH_WORD_SIZE *)info->start[0];
 441         addr[0] = (CFG_FLASH_WORD_SIZE)0x00F000F0;      /* reset bank */
 442
 443         printf (" done\n");
 444         return 0;
 445 }
 446
 447 /*
 448  * Copy memory to flash, returns:
 449  * 0 - OK
 450  * 1 - write timeout
 451  * 2 - Flash not erased
 452  */
 453 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 454 {
 455         ulong cp, wp, data;
 456         int i, l, rc;
 457
 458         wp = (addr & ~3);       /* get lower word aligned address */
 459
 460         /*
 461          * handle unaligned start bytes
 462          */
 463         if ((l = addr - wp) != 0) {
 464                 data = 0;
 465                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 466                         data = (data << 8) | (*(uchar *)cp);
 467                 }
 468                 for (; i<4 && cnt>0; ++i) {
 469                         data = (data << 8) | *src++;
 470                         --cnt;
 471                         ++cp;
 472                 }
 473                 for (; cnt==0 && i<4; ++i, ++cp) {
 474                         data = (data << 8) | (*(uchar *)cp);
 475                 }
 476
 477                 if ((rc = write_word(info, wp, data)) != 0) {
 478                         return (rc);
 479                 }
 480                 wp += 4;
 481         }
 482
 483         /*
 484          * handle word aligned part
 485          */
 486         while (cnt >= 4) {
 487                 data = 0;
 488                 for (i=0; i<4; ++i)
 489                         data = (data << 8) | *src++;
 490                 if ((rc = write_word(info, wp, data)) != 0)
 491                         return (rc);
 492                 wp  += 4;
 493                 cnt -= 4;
 494         }
 495
 496         if (cnt == 0)
 497                 return (0);
 498
 499         /*
 500          * handle unaligned tail bytes
 501          */
 502         data = 0;
 503         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 504                 data = (data << 8) | *src++;
 505                 --cnt;
 506         }
 507         for (; i<4; ++i, ++cp)
 508                 data = (data << 8) | (*(uchar *)cp);
 509
 510         return (write_word(info, wp, data));
 511 }
 512
 513 /*
 514  * Write a word to Flash, returns:
 515  * 0 - OK
 516  * 1 - write timeout
 517  * 2 - Flash not erased
 518  */
 519 static int write_word(flash_info_t *info, ulong dest, ulong data)
 520 {
 521         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *)(info->start[0]);
 522         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *)dest;
 523         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *)&data;
 524         ulong start;
 525         int flag;
 526         int i;
 527
 528         /* Check if Flash is (sufficiently) erased */
 529         if ((*((vu_long *)dest) & data) != data)
 530                 return (2);
 531
 532         /* Disable interrupts which might cause a timeout here */
 533         flag = disable_interrupts();
 534
 535         for (i=0; i<4/sizeof(CFG_FLASH_WORD_SIZE); i++) {
 536                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
 537                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
 538                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00A000A0;
 539
 540                 dest2[i] = data2[i];
 541
 542                 /* re-enable interrupts if necessary */
 543                 if (flag)
 544                         enable_interrupts();
 545
 546                 /* data polling for D7 */
 547                 start = get_timer (0);
 548                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE)0x00800080) !=
 549                        (data2[i] & (CFG_FLASH_WORD_SIZE)0x00800080)) {
 550                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
 551                                 return (1);
 552                 }
 553         }
 554
 555         return (0);
 556 }