board/icu862/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <mpc8xx.h>
  10
  11 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  12
  13 #if defined(CONFIG_ENV_IS_IN_FLASH)
  14 # ifndef  CONFIG_ENV_ADDR
  15 #  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  16 # endif
  17 # ifndef  CONFIG_ENV_SIZE
  18 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  19 # endif
  20 # ifndef  CONFIG_ENV_SECT_SIZE
  21 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  22 # endif
  23 #endif
  24
  25 /*-----------------------------------------------------------------------
  26  * Functions
  27  */
  28 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  29 static int write_word (flash_info_t *info, ulong dest, ulong data);
  30 static void flash_get_offsets (ulong base, flash_info_t *info);
  31
  32 /*-----------------------------------------------------------------------
  33  */
  34
  35 unsigned long flash_init (void)
  36 {
  37         volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  38         volatile memctl8xx_t *memctl = &immap->im_memctl;
  39         unsigned long size_b0;
  40         int i;
  41
  42         /* Init: no FLASHes known */
  43         for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  44                 flash_info[i].flash_id = FLASH_UNKNOWN;
  45
  46         /* Static FLASH Bank configuration here - FIXME XXX */
  47
  48         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  49
  50         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  51                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  52                         size_b0,
  53                         size_b0 >> 20);
  54         }
  55
  56         /* Remap FLASH according to real size */
  57         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
  58         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
  59
  60         /* Re-do sizing to get full correct info */
  61         size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  62
  63         flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  64
  65 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  66         /* monitor protection ON by default */
  67         flash_protect(FLAG_PROTECT_SET,
  68                       CONFIG_SYS_MONITOR_BASE,
  69                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  70                       &flash_info[0]);
  71 #endif
  72
  73 #ifdef  CONFIG_ENV_IS_IN_FLASH
  74         /* ENV protection ON by default */
  75         flash_protect(FLAG_PROTECT_SET,
  76                       CONFIG_ENV_ADDR,
  77                       CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  78                       &flash_info[0]);
  79 #endif
  80
  81         /* ICU862 Board has only one Flash Bank */
  82         flash_info[0].size = size_b0;
  83
  84         return size_b0;
  85
  86 }
  87
  88 /*-----------------------------------------------------------------------
  89  */
  90 static void flash_get_offsets (ulong base, flash_info_t *info)
  91 {
  92         int i;
  93
  94         /* set up sector start address table */
  95         if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
  96                 ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM033C)) {
  97                 /* set sector offsets for uniform sector type   */
  98                 for (i = 0; i < info->sector_count; i++) {
  99                         info->start[i] = base + (i * 0x00040000);
 100                 }
 101         }
 102 }
 103
 104 /*-----------------------------------------------------------------------
 105  */
 106 void flash_print_info  (flash_info_t *info)
 107 {
 108         int i;
 109
 110         if (info->flash_id == FLASH_UNKNOWN) {
 111                 puts ("missing or unknown FLASH type\n");
 112                 return;
 113         }
 114
 115         switch (info->flash_id & FLASH_VENDMASK) {
 116         case FLASH_MAN_AMD:     puts ("AMD ");          break;
 117         case FLASH_MAN_FUJ:     puts ("FUJITSU ");      break;
 118         case FLASH_MAN_BM:      puts ("BRIGHT MICRO "); break;
 119         default:                puts ("Unknown Vendor "); break;
 120         }
 121
 122         switch (info->flash_id & FLASH_TYPEMASK) {
 123         case FLASH_AM040:       puts ("29F040/29LV040 (4 Mbit, uniform sectors)\n");
 124                                 break;
 125         case FLASH_AM400B:      puts ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 126                                 break;
 127         case FLASH_AM400T:      puts ("AM29LV400T (4 Mbit, top boot sector)\n");
 128                                 break;
 129         case FLASH_AM800B:      puts ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 130                                 break;
 131         case FLASH_AM800T:      puts ("AM29LV800T (8 Mbit, top boot sector)\n");
 132                                 break;
 133         case FLASH_AM160B:      puts ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 134                                 break;
 135         case FLASH_AM160T:      puts ("AM29LV160T (16 Mbit, top boot sector)\n");
 136                                 break;
 137         case FLASH_AM320B:      puts ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 138                                 break;
 139         case FLASH_AM320T:      puts ("AM29LV320T (32 Mbit, top boot sector)\n");
 140                                 break;
 141         case FLASH_AM033C:      puts ("AM29LV033C (32 Mbit)\n");
 142                                 break;
 143         default:                puts ("Unknown Chip Type\n");
 144                                 break;
 145         }
 146
 147         printf ("  Size: %ld MB in %d Sectors\n",
 148                 info->size >> 20, info->sector_count);
 149
 150         puts ("  Sector Start Addresses:");
 151
 152         for (i=0; i<info->sector_count; ++i) {
 153                 if ((i % 5) == 0) {
 154                         puts ("\n   ");
 155                 }
 156
 157                 printf (" %08lX%s",
 158                         info->start[i],
 159                         info->protect[i] ? " (RO)" : "     "
 160                 );
 161         }
 162
 163         puts ("\n");
 164 }
 165
 166 /*-----------------------------------------------------------------------
 167  */
 168
 169 /*
 170  * The following code cannot be run from FLASH!
 171  */
 172
 173 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 174 {
 175         short i;
 176 #if 0
 177         ulong base = (ulong)addr;
 178 #endif
 179         uchar value;
 180
 181         /* Write auto select command: read Manufacturer ID */
 182 #if 0
 183         addr[0x0555] = 0x00AA00AA;
 184         addr[0x02AA] = 0x00550055;
 185         addr[0x0555] = 0x00900090;
 186 #else
 187         addr[0x0555] = 0xAAAAAAAA;
 188         addr[0x02AA] = 0x55555555;
 189         addr[0x0555] = 0x90909090;
 190 #endif
 191
 192         value = addr[0];
 193
 194         switch (value + (value << 16)) {
 195         case AMD_MANUFACT:
 196                 info->flash_id = FLASH_MAN_AMD;
 197                 break;
 198
 199         case FUJ_MANUFACT:
 200                 info->flash_id = FLASH_MAN_FUJ;
 201                 break;
 202
 203         default:
 204                 info->flash_id = FLASH_UNKNOWN;
 205                 info->sector_count = 0;
 206                 info->size = 0;
 207                 break;
 208         }
 209
 210         value = addr[1];                        /* device ID            */
 211
 212         switch ((unsigned long)value) {
 213         case AMD_ID_F040B:
 214                 info->flash_id += FLASH_AM040;
 215                 info->sector_count = 8;
 216                 info->size = 0x00200000;
 217                 break;                          /* => 2 MB              */
 218
 219         case AMD_ID_LV400T:
 220                 info->flash_id += FLASH_AM400T;
 221                 info->sector_count = 11;
 222                 info->size = 0x00100000;
 223                 break;                          /* => 1 MB              */
 224
 225         case AMD_ID_LV400B:
 226                 info->flash_id += FLASH_AM400B;
 227                 info->sector_count = 11;
 228                 info->size = 0x00100000;
 229                 break;                          /* => 1 MB              */
 230
 231         case AMD_ID_LV800T:
 232                 info->flash_id += FLASH_AM800T;
 233                 info->sector_count = 19;
 234                 info->size = 0x00200000;
 235                 break;                          /* => 2 MB              */
 236
 237         case AMD_ID_LV800B:
 238                 info->flash_id += FLASH_AM800B;
 239                 info->sector_count = 19;
 240                 info->size = 0x00200000;
 241                 break;                          /* => 2 MB              */
 242
 243         case AMD_ID_LV160T:
 244                 info->flash_id += FLASH_AM160T;
 245                 info->sector_count = 35;
 246                 info->size = 0x00400000;
 247                 break;                          /* => 4 MB              */
 248
 249         case AMD_ID_LV160B:
 250                 info->flash_id += FLASH_AM160B;
 251                 info->sector_count = 35;
 252                 info->size = 0x00400000;
 253                 break;                          /* => 4 MB              */
 254 #if 0   /* enable when device IDs are available */
 255         case AMD_ID_LV320T:
 256                 info->flash_id += FLASH_AM320T;
 257                 info->sector_count = 67;
 258                 info->size = 0x00800000;
 259                 break;                          /* => 8 MB              */
 260
 261         case AMD_ID_LV320B:
 262                 info->flash_id += FLASH_AM320B;
 263                 info->sector_count = 67;
 264                 info->size = 0x00800000;
 265                 break;                          /* => 8 MB              */
 266 #endif
 267         case AMD_ID_LV033C:
 268                 info->flash_id += FLASH_AM033C;
 269                 info->sector_count = 64;
 270                 info->size = 0x01000000;
 271                 break;                          /* => 16Mb              */
 272         default:
 273                 info->flash_id = FLASH_UNKNOWN;
 274                 return (0);                     /* => no or unknown flash */
 275
 276         }
 277
 278 #if 0
 279         /* set up sector start address table */
 280         if (info->flash_id & FLASH_BTYPE) {
 281                 /* set sector offsets for bottom boot block type        */
 282                 info->start[0] = base + 0x00000000;
 283                 info->start[1] = base + 0x00008000;
 284                 info->start[2] = base + 0x0000C000;
 285                 info->start[3] = base + 0x00010000;
 286                 for (i = 4; i < info->sector_count; i++) {
 287                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 288                 }
 289         } else {
 290                 /* set sector offsets for top boot block type           */
 291                 i = info->sector_count - 1;
 292                 info->start[i--] = base + info->size - 0x00008000;
 293                 info->start[i--] = base + info->size - 0x0000C000;
 294                 info->start[i--] = base + info->size - 0x00010000;
 295                 for (; i >= 0; i--) {
 296                         info->start[i] = base + i * 0x00020000;
 297                 }
 298         }
 299 #else
 300         flash_get_offsets ((ulong)addr, &flash_info[0]);
 301 #endif
 302
 303         /* check for protected sectors */
 304         for (i = 0; i < info->sector_count; i++) {
 305                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 306                 /* D0 = 1 if protected */
 307                 addr = (volatile unsigned long *)(info->start[i]);
 308 #if 1
 309                 /* We don't know why it happens, but on ICU Board       *
 310                  * for AMD29033C flash we need to resend the command of *
 311                  * reading flash protection for upper 8 Mb of flash     */
 312                 if ( i == 32 ) {
 313                         addr[0x0555] = 0xAAAAAAAA;
 314                         addr[0x02AA] = 0x55555555;
 315                         addr[0x0555] = 0x90909090;
 316                 }
 317 #endif
 318                 info->protect[i] = addr[2] & 1;
 319         }
 320
 321         /*
 322          * Prevent writes to uninitialized FLASH.
 323          */
 324         if (info->flash_id != FLASH_UNKNOWN) {
 325                 addr = (volatile unsigned long *)info->start[0];
 326 #if 0
 327                 *addr = 0x00F000F0;     /* reset bank */
 328 #else
 329                 *addr = 0xF0F0F0F0;     /* reset bank */
 330 #endif
 331         }
 332
 333         return (info->size);
 334 }
 335
 336
 337 /*-----------------------------------------------------------------------
 338  */
 339
 340 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 341 {
 342         vu_long *addr = (vu_long*)(info->start[0]);
 343         int flag, prot, sect, l_sect;
 344         ulong start, now, last;
 345
 346         if ((s_first < 0) || (s_first > s_last)) {
 347                 if (info->flash_id == FLASH_UNKNOWN) {
 348                         puts ("- missing\n");
 349                 } else {
 350                         puts ("- no sectors to erase\n");
 351                 }
 352                 return 1;
 353         }
 354
 355         if ((info->flash_id == FLASH_UNKNOWN) ||
 356             (info->flash_id > FLASH_AMD_COMP)) {
 357                 puts ("Can't erase unknown flash type - aborted\n");
 358                 return 1;
 359         }
 360
 361         prot = 0;
 362         for (sect=s_first; sect<=s_last; ++sect) {
 363                 if (info->protect[sect]) {
 364                         prot++;
 365                 }
 366         }
 367
 368         if (prot) {
 369                 printf ("- Warning: %d protected sectors will not be erased!\n",
 370                         prot);
 371         } else {
 372                 puts ("\n");
 373         }
 374
 375         l_sect = -1;
 376
 377         /* Disable interrupts which might cause a timeout here */
 378         flag = disable_interrupts();
 379
 380 #if 0
 381         addr[0x0555] = 0x00AA00AA;
 382         addr[0x02AA] = 0x00550055;
 383         addr[0x0555] = 0x00800080;
 384         addr[0x0555] = 0x00AA00AA;
 385         addr[0x02AA] = 0x00550055;
 386 #else
 387         addr[0x0555] = 0xAAAAAAAA;
 388         addr[0x02AA] = 0x55555555;
 389         addr[0x0555] = 0x80808080;
 390         addr[0x0555] = 0xAAAAAAAA;
 391         addr[0x02AA] = 0x55555555;
 392 #endif
 393
 394         /* Start erase on unprotected sectors */
 395         for (sect = s_first; sect<=s_last; sect++) {
 396                 if (info->protect[sect] == 0) { /* not protected */
 397                         addr = (vu_long*)(info->start[sect]);
 398 #if 0
 399                         addr[0] = 0x00300030;
 400 #else
 401                         addr[0] = 0x30303030;
 402 #endif
 403                         l_sect = sect;
 404                 }
 405         }
 406
 407         /* re-enable interrupts if necessary */
 408         if (flag)
 409                 enable_interrupts();
 410
 411         /* wait at least 80us - let's wait 1 ms */
 412         udelay (1000);
 413
 414         /*
 415          * We wait for the last triggered sector
 416          */
 417         if (l_sect < 0)
 418                 goto DONE;
 419
 420         start = get_timer (0);
 421         last  = start;
 422         addr = (vu_long*)(info->start[l_sect]);
 423 #if 0
 424         while ((addr[0] & 0x00800080) != 0x00800080)
 425 #else
 426         while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
 427 #endif
 428         {
 429                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 430                         puts ("Timeout\n");
 431                         return 1;
 432                 }
 433                 /* show that we're waiting */
 434                 if ((now - last) > 1000) {      /* every second */
 435                         putc ('.');
 436                         last = now;
 437                 }
 438         }
 439
 440 DONE:
 441         /* reset to read mode */
 442         addr = (volatile unsigned long *)info->start[0];
 443 #if 0
 444         addr[0] = 0x00F000F0;   /* reset bank */
 445 #else
 446         addr[0] = 0xF0F0F0F0;   /* reset bank */
 447 #endif
 448
 449         puts (" done\n");
 450         return 0;
 451 }
 452
 453 /*-----------------------------------------------------------------------
 454  * Copy memory to flash, returns:
 455  * 0 - OK
 456  * 1 - write timeout
 457  * 2 - Flash not erased
 458  */
 459
 460 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 461 {
 462         ulong cp, wp, data;
 463         int i, l, rc;
 464
 465         wp = (addr & ~3);       /* get lower word aligned address */
 466
 467         /*
 468          * handle unaligned start bytes
 469          */
 470         if ((l = addr - wp) != 0) {
 471                 data = 0;
 472                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 473                         data = (data << 8) | (*(uchar *)cp);
 474                 }
 475                 for (; i<4 && cnt>0; ++i) {
 476                         data = (data << 8) | *src++;
 477                         --cnt;
 478                         ++cp;
 479                 }
 480                 for (; cnt==0 && i<4; ++i, ++cp) {
 481                         data = (data << 8) | (*(uchar *)cp);
 482                 }
 483
 484                 if ((rc = write_word(info, wp, data)) != 0) {
 485                         return (rc);
 486                 }
 487                 wp += 4;
 488         }
 489
 490         /*
 491          * handle word aligned part
 492          */
 493         while (cnt >= 4) {
 494                 data = 0;
 495                 for (i=0; i<4; ++i) {
 496                         data = (data << 8) | *src++;
 497                 }
 498                 if ((rc = write_word(info, wp, data)) != 0) {
 499                         return (rc);
 500                 }
 501                 wp  += 4;
 502                 cnt -= 4;
 503         }
 504
 505         if (cnt == 0) {
 506                 return (0);
 507         }
 508
 509         /*
 510          * handle unaligned tail bytes
 511          */
 512         data = 0;
 513         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 514                 data = (data << 8) | *src++;
 515                 --cnt;
 516         }
 517         for (; i<4; ++i, ++cp) {
 518                 data = (data << 8) | (*(uchar *)cp);
 519         }
 520
 521         return (write_word(info, wp, data));
 522 }
 523
 524 /*-----------------------------------------------------------------------
 525  * Write a word to Flash, returns:
 526  * 0 - OK
 527  * 1 - write timeout
 528  * 2 - Flash not erased
 529  */
 530 static int write_word (flash_info_t *info, ulong dest, ulong data)
 531 {
 532         vu_long *addr = (vu_long*)(info->start[0]);
 533         ulong start;
 534         int flag;
 535
 536         /* Check if Flash is (sufficiently) erased */
 537         if ((*((vu_long *)dest) & data) != data) {
 538                 return (2);
 539         }
 540         /* Disable interrupts which might cause a timeout here */
 541         flag = disable_interrupts();
 542
 543 #if 0
 544         addr[0x0555] = 0x00AA00AA;
 545         addr[0x02AA] = 0x00550055;
 546         addr[0x0555] = 0x00A000A0;
 547 #else
 548         addr[0x0555] = 0xAAAAAAAA;
 549         addr[0x02AA] = 0x55555555;
 550         addr[0x0555] = 0xA0A0A0A0;
 551 #endif
 552
 553         *((vu_long *)dest) = data;
 554
 555         /* re-enable interrupts if necessary */
 556         if (flag)
 557                 enable_interrupts();
 558
 559         /* data polling for D7 */
 560         start = get_timer (0);
 561 #if 0
 562         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080))
 563 #else
 564         while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080))
 565 #endif
 566         {
 567                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 568                         return (1);
 569                 }
 570         }
 571         return (0);
 572 }
 573
 574 /*-----------------------------------------------------------------------
 575  */