board/exbitgen/flash.c

   1 /*
   2  * (C) Copyright 2003
   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 <asm/u-boot.h>
  32 #include <asm/processor.h>
  33 #include <ppc4xx.h>
  34 #include <common.h>
  35
  36 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  37
  38 /*-----------------------------------------------------------------------
  39  * Functions
  40  */
  41 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  42 static int write_word (flash_info_t *info, ulong dest, ulong data);
  43
  44 #ifdef MEIGSBOARD_ONBOARD_FLASH /* onboard = 2MB */
  45 #  ifdef CONFIG_EXBITGEN
  46 #     define FLASH_WORD_SIZE unsigned long
  47 #  endif
  48 #else /* Meigsboard socket flash = 512KB */
  49 #  ifdef CONFIG_EXBITGEN
  50 #    define FLASH_WORD_SIZE unsigned char
  51 #  endif
  52 #endif
  53
  54 #ifdef CONFIG_EXBITGEN
  55 #define ADDR0           0x5555
  56 #define ADDR1           0x2aaa
  57 #define FLASH_WORD_SIZE unsigned char
  58 #endif
  59
  60 /*-----------------------------------------------------------------------
  61  */
  62
  63 unsigned long flash_init (void)
  64 {
  65         unsigned long bank_size;
  66         unsigned long tot_size;
  67         unsigned long bank_addr;
  68         int i;
  69
  70         /* Init: no FLASHes known */
  71         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
  72                 flash_info[i].flash_id = FLASH_UNKNOWN;
  73                 flash_info[i].size = 0;
  74         }
  75
  76         tot_size = 0;
  77
  78         /* Detect Boot Flash */
  79         bank_addr = CFG_FLASH0_BASE;
  80         bank_size = flash_get_size((vu_long *)bank_addr, &flash_info[0]);
  81         if (bank_size > 0) {
  82                 (void)flash_protect(FLAG_PROTECT_CLEAR,
  83                         bank_addr,
  84                         bank_addr + bank_size - 1,
  85                         &flash_info[0]);
  86         }
  87         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  88                 printf ("## Unknown FLASH on Boot Flash Bank\n");
  89         }
  90         flash_info[0].size = bank_size;
  91         tot_size += bank_size;
  92
  93         /* Detect Application Flash */
  94         bank_addr = CFG_FLASH1_BASE;
  95         for (i = 1; i < CFG_MAX_FLASH_BANKS; ++i) {
  96                 bank_size = flash_get_size((vu_long *)bank_addr, &flash_info[i]);
  97                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
  98                         break;
  99                 }
 100                 if (bank_size > 0) {
 101                         (void)flash_protect(FLAG_PROTECT_CLEAR,
 102                                 bank_addr,
 103                                 bank_addr + bank_size - 1,
 104                                 &flash_info[i]);
 105                 }
 106                 flash_info[i].size = bank_size;
 107                 tot_size += bank_size;
 108                 bank_addr += bank_size;
 109         }
 110         if (flash_info[1].flash_id == FLASH_UNKNOWN) {
 111                 printf ("## Unknown FLASH on Application Flash Bank\n");
 112         }
 113
 114         /* Protect monitor and environment sectors */
 115 #if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
 116         flash_protect(FLAG_PROTECT_SET,
 117                 CFG_MONITOR_BASE,
 118                 CFG_MONITOR_BASE + monitor_flash_len - 1,
 119                 &flash_info[0]);
 120 #if 0xfffffffc >= CFG_FLASH0_BASE
 121 #if 0xfffffffc <= CFG_FLASH0_BASE + CFG_FLASH0_SIZE - 1
 122         flash_protect(FLAG_PROTECT_SET,
 123                 0xfffffffc, 0xffffffff,
 124                 &flash_info[0]);
 125 #endif
 126 #endif
 127 #endif
 128
 129 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
 130         flash_protect(FLAG_PROTECT_SET,
 131                 CFG_ENV_ADDR,
 132                 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
 133                 &flash_info[0]);
 134 #endif
 135
 136         return tot_size;
 137 }
 138
 139 /*-----------------------------------------------------------------------
 140  */
 141 void flash_print_info  (flash_info_t *info)
 142 {
 143         int i;
 144
 145         if (info->flash_id == FLASH_UNKNOWN) {
 146                 printf ("missing or unknown FLASH type\n");
 147                 return;
 148         }
 149
 150         switch (info->flash_id & FLASH_VENDMASK) {
 151         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 152         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 153         case FLASH_MAN_SST:     printf ("SST ");                break;
 154         default:                printf ("Unknown Vendor ");     break;
 155         }
 156
 157         switch (info->flash_id & FLASH_TYPEMASK) {
 158         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 159                                 break;
 160         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 161                                 break;
 162         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 163                                 break;
 164         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 165                                 break;
 166         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 167                                 break;
 168         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 169                                 break;
 170         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 171                                 break;
 172         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 173                                 break;
 174         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 175                                 break;
 176         case FLASH_AMDLV033C:   printf ("AM29LV033C (32 Mbit, uniform sector size)\n");
 177                                 break;
 178         case FLASH_AMDLV065D:   printf ("AM29LV065D (64 Mbit, uniform sector size)\n");
 179                                 break;
 180         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 181                                 break;
 182         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 183                                 break;
 184         case FLASH_SST040:      printf ("SST39LF/VF040 (4 Mbit, uniform sector size)\n");
 185                                 break;
 186         default:                printf ("Unknown Chip Type\n");
 187                                 break;
 188         }
 189
 190         printf ("  Size: %ld KB in %d Sectors\n",
 191                 info->size >> 10, info->sector_count);
 192
 193         printf ("  Sector Start Addresses:");
 194         for (i=0; i<info->sector_count; ++i) {
 195                 if ((i % 5) == 0)
 196                         printf ("\n   ");
 197                 printf (" %08lX%s",
 198                         info->start[i],
 199                         info->protect[i] ? " (RO)" : "     "
 200                 );
 201         }
 202         printf ("\n");
 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         FLASH_WORD_SIZE value;
 219         ulong base = (ulong)addr;
 220         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 221
 222         /* Write auto select command: read Manufacturer ID */
 223         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 224         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 225         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 226
 227         value = addr2[0];
 228
 229         switch (value) {
 230         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 231                 info->flash_id = FLASH_MAN_AMD;
 232                 break;
 233         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 234                 info->flash_id = FLASH_MAN_FUJ;
 235                 break;
 236         case (FLASH_WORD_SIZE)SST_MANUFACT:
 237                 info->flash_id = FLASH_MAN_SST;
 238                 break;
 239         default:
 240                 info->flash_id = FLASH_UNKNOWN;
 241                 info->sector_count = 0;
 242                 info->size = 0;
 243                 return (0);                     /* no or unknown flash  */
 244         }
 245
 246         value = addr2[1];                       /* device ID            */
 247
 248         switch (value) {
 249         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 250                 info->flash_id += FLASH_AM040;
 251                 info->sector_count = 8;
 252                 info->size = 0x0080000; /* => 512 ko */
 253                 break;
 254         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 255                 info->flash_id += FLASH_AM400T;
 256                 info->sector_count = 11;
 257                 info->size = 0x00080000;
 258                 break;                          /* => 0.5 MB            */
 259
 260         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 261                 info->flash_id += FLASH_AM400B;
 262                 info->sector_count = 11;
 263                 info->size = 0x00080000;
 264                 break;                          /* => 0.5 MB            */
 265
 266         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 267                 info->flash_id += FLASH_AM800T;
 268                 info->sector_count = 19;
 269                 info->size = 0x00100000;
 270                 break;                          /* => 1 MB              */
 271
 272         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 273                 info->flash_id += FLASH_AM800B;
 274                 info->sector_count = 19;
 275                 info->size = 0x00100000;
 276                 break;                          /* => 1 MB              */
 277
 278         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 279                 info->flash_id += FLASH_AM160T;
 280                 info->sector_count = 35;
 281                 info->size = 0x00200000;
 282                 break;                          /* => 2 MB              */
 283
 284         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 285                 info->flash_id += FLASH_AM160B;
 286                 info->sector_count = 35;
 287                 info->size = 0x00200000;
 288                 break;                          /* => 2 MB              */
 289
 290         case (FLASH_WORD_SIZE)AMD_ID_LV033C:
 291                 info->flash_id += FLASH_AMDLV033C;
 292                 info->sector_count = 64;
 293                 info->size = 0x00400000;
 294                 break;                          /* => 4 MB              */
 295
 296         case (FLASH_WORD_SIZE)AMD_ID_LV065D:
 297                 info->flash_id += FLASH_AMDLV065D;
 298                 info->sector_count = 128;
 299                 info->size = 0x00800000;
 300                 break;                          /* => 8 MB              */
 301
 302         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 303                 info->flash_id += FLASH_AM320T;
 304                 info->sector_count = 67;
 305                 info->size = 0x00400000;
 306                 break;                          /* => 4 MB              */
 307
 308         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 309                 info->flash_id += FLASH_AM320B;
 310                 info->sector_count = 67;
 311                 info->size = 0x00400000;
 312                 break;                          /* => 4 MB              */
 313
 314         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 315                 info->flash_id += FLASH_SST800A;
 316                 info->sector_count = 16;
 317                 info->size = 0x00100000;
 318                 break;                          /* => 1 MB              */
 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         case (FLASH_WORD_SIZE)SST_ID_xF040:
 326                 info->flash_id += FLASH_SST040;
 327                 info->sector_count = 128;
 328                 info->size = 0x00080000;
 329                 break;                          /* => 512KB             */
 330
 331         default:
 332                 info->flash_id = FLASH_UNKNOWN;
 333                 return (0);                     /* => no or unknown flash */
 334
 335         }
 336
 337         /* set up sector start address table */
 338         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 339                 (info->flash_id  == FLASH_AM040) ||
 340                 (info->flash_id == FLASH_AMDLV033C) ||
 341                 (info->flash_id == FLASH_AMDLV065D)) {
 342                 ulong sectsize = info->size / info->sector_count;
 343                 for (i = 0; i < info->sector_count; i++)
 344                         info->start[i] = base + (i * sectsize);
 345         } else {
 346             if (info->flash_id & FLASH_BTYPE) {
 347                 /* set sector offsets for bottom boot block type        */
 348                 info->start[0] = base + 0x00000000;
 349                 info->start[1] = base + 0x00004000;
 350                 info->start[2] = base + 0x00006000;
 351                 info->start[3] = base + 0x00008000;
 352                 for (i = 4; i < info->sector_count; i++) {
 353                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 354                 }
 355             } else {
 356                 /* set sector offsets for top boot block type           */
 357                 i = info->sector_count - 1;
 358                 info->start[i--] = base + info->size - 0x00004000;
 359                 info->start[i--] = base + info->size - 0x00006000;
 360                 info->start[i--] = base + info->size - 0x00008000;
 361                 for (; i >= 0; i--) {
 362                         info->start[i] = base + i * 0x00010000;
 363                 }
 364             }
 365         }
 366
 367         /* check for protected sectors */
 368         for (i = 0; i < info->sector_count; i++) {
 369                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 370                 /* D0 = 1 if protected */
 371
 372                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 373                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 374                         info->protect[i] = 0;
 375                 else
 376                         info->protect[i] = addr2[2] & 1;
 377         }
 378
 379         /* switch to the read mode */
 380         if (info->flash_id != FLASH_UNKNOWN) {
 381                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 382                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 383         }
 384
 385         return (info->size);
 386 }
 387
 388 /*-----------------------------------------------------------------------
 389  */
 390
 391 int flash_erase (flash_info_t *info, int s_first, int s_last)
 392 {
 393         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 394         volatile FLASH_WORD_SIZE *addr2;
 395         int flag, prot, sect;
 396         ulong start, now, last;
 397
 398         if ((s_first < 0) || (s_first > s_last)) {
 399                 if (info->flash_id == FLASH_UNKNOWN) {
 400                         printf ("- missing\n");
 401                 } else {
 402                         printf ("- no sectors to erase\n");
 403                 }
 404                 return 1;
 405         }
 406
 407         if (info->flash_id == FLASH_UNKNOWN) {
 408                 printf ("Can't erase unknown flash type - aborted\n");
 409                 return 1;
 410         }
 411
 412         prot = 0;
 413         for (sect=s_first; sect<=s_last; ++sect) {
 414                 if (info->protect[sect]) {
 415                         prot++;
 416                 }
 417         }
 418
 419         if (prot) {
 420                 printf ("- Warning: %d protected sectors will not be erased!\n",
 421                         prot);
 422         } else {
 423                 printf ("\n");
 424         }
 425
 426         start = get_timer (0);
 427         last  = start;
 428         /* Start erase on unprotected sectors */
 429         for (sect = s_first; sect <= s_last; sect++) {
 430                 if (info->protect[sect] == 0) { /* not protected */
 431                         addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 432
 433                         /* Disable interrupts which might cause a timeout here */
 434                         flag = disable_interrupts();
 435
 436                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 437                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 438                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 439                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 440                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 441                         addr2[0] = (FLASH_WORD_SIZE)0x00300030;
 442
 443                         /* re-enable interrupts if necessary */
 444                         if (flag)
 445                                 enable_interrupts();
 446
 447                         /* wait at least 80us - let's wait 1 ms */
 448                         udelay (1000);
 449
 450                         while ((addr2[0] & 0x00800080) !=
 451                                 (FLASH_WORD_SIZE) 0x00800080) {
 452                                 if ((now=get_timer(start)) >
 453                                            CFG_FLASH_ERASE_TOUT) {
 454                                         printf ("Timeout\n");
 455                                         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;
 456                                         return 1;
 457                                 }
 458
 459                                 /* show that we're waiting */
 460                                 if ((now - last) > 1000) {  /* every second  */
 461                                         putc ('.');
 462                                         last = now;
 463                                 }
 464                         }
 465
 466                         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;
 467                 }
 468         }
 469
 470         printf (" done\n");
 471
 472         return 0;
 473 }
 474
 475 /*-----------------------------------------------------------------------
 476  * Copy memory to flash, returns:
 477  * 0 - OK
 478  * 1 - write timeout
 479  * 2 - Flash not erased
 480  */
 481
 482 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 483 {
 484         ulong cp, wp, data;
 485         int i, l, rc;
 486
 487         wp = (addr & ~3);       /* get lower word aligned address */
 488
 489         /*
 490          * handle unaligned start bytes
 491          */
 492         if ((l = addr - wp) != 0) {
 493                 data = 0;
 494                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 495                         data = (data << 8) | (*(uchar *)cp);
 496                 }
 497                 for (; i<4 && cnt>0; ++i) {
 498                         data = (data << 8) | *src++;
 499                         --cnt;
 500                         ++cp;
 501                 }
 502                 for (; cnt==0 && i<4; ++i, ++cp) {
 503                         data = (data << 8) | (*(uchar *)cp);
 504                 }
 505
 506                 if ((rc = write_word(info, wp, data)) != 0) {
 507                         return (rc);
 508                 }
 509                 wp += 4;
 510         }
 511
 512         /*
 513          * handle word aligned part
 514          */
 515         while (cnt >= 4) {
 516                 data = 0;
 517                 for (i=0; i<4; ++i) {
 518                         data = (data << 8) | *src++;
 519                 }
 520                 if ((rc = write_word(info, wp, data)) != 0) {
 521                         return (rc);
 522                 }
 523                 wp  += 4;
 524                 cnt -= 4;
 525         }
 526
 527         if (cnt == 0) {
 528                 return (0);
 529         }
 530
 531         /*
 532          * handle unaligned tail bytes
 533          */
 534         data = 0;
 535         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 536                 data = (data << 8) | *src++;
 537                 --cnt;
 538         }
 539         for (; i<4; ++i, ++cp) {
 540                 data = (data << 8) | (*(uchar *)cp);
 541         }
 542
 543         return (write_word(info, wp, data));
 544 }
 545
 546 /*-----------------------------------------------------------------------
 547  * Write a word to Flash, returns:
 548  * 0 - OK
 549  * 1 - write timeout
 550  * 2 - Flash not erased
 551  */
 552 static int write_word (flash_info_t *info, ulong dest, ulong data)
 553 {
 554         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
 555         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
 556         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
 557         ulong start;
 558         int flag;
 559         int i;
 560
 561         /* Check if Flash is (sufficiently) erased */
 562         if ((*((volatile ulong *)dest) & data) != data) {
 563                 printf("dest = %08lx, *dest = %08lx, data = %08lx\n",
 564                         dest, *(volatile ulong *)dest, data);
 565                 return 2;
 566         }
 567
 568         for (i=0; i < 4/sizeof(FLASH_WORD_SIZE); i++) {
 569                 /* Disable interrupts which might cause a timeout here */
 570                 flag = disable_interrupts();
 571
 572                 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 573                 addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 574                 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
 575                 dest2[i] = data2[i];
 576
 577                 /* re-enable interrupts if necessary */
 578                 if (flag)
 579                         enable_interrupts();
 580
 581                 /* data polling for D7 */
 582                 start = get_timer (0);
 583                 while ((dest2[i] & 0x00800080) != (data2[i] & 0x00800080)) {
 584                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 585                                 addr2[0] = (FLASH_WORD_SIZE)0x00F000F0;
 586                                 return (1);
 587                         }
 588                 }
 589         }
 590
 591         addr2[0] = (FLASH_WORD_SIZE)0x00F000F0;
 592
 593         return (0);
 594 }
 595
 596 /*-----------------------------------------------------------------------
 597  */