board/icu862/flash.c

   1 /*
   2  * (C) Copyright 2001
   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 #include <common.h>
  25 #include <mpc8xx.h>
  26
  27 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  28
  29 #if defined(CONFIG_ENV_IS_IN_FLASH)
  30 # ifndef  CONFIG_ENV_ADDR
  31 #  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  32 # endif
  33 # ifndef  CONFIG_ENV_SIZE
  34 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  35 # endif
  36 # ifndef  CONFIG_ENV_SECT_SIZE
  37 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  38 # endif
  39 #endif
  40
  41 /*-----------------------------------------------------------------------
  42  * Functions
  43  */
  44 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  45 static int write_word (flash_info_t *info, ulong dest, ulong data);
  46 static void flash_get_offsets (ulong base, flash_info_t *info);
  47
  48 /*-----------------------------------------------------------------------
  49  */
  50
  51 unsigned long flash_init (void)
  52 {
  53         volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  54         volatile memctl8xx_t *memctl = &immap->im_memctl;
  55         unsigned long size_b0;
  56         int i;
  57
  58         /* Init: no FLASHes known */
  59         for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  60                 flash_info[i].flash_id = FLASH_UNKNOWN;
  61
  62         /* Static FLASH Bank configuration here - FIXME XXX */
  63
  64         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  65
  66         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  67                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  68                         size_b0,
  69                         size_b0 >> 20);
  70         }
  71
  72         /* Remap FLASH according to real size */
  73         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
  74         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
  75
  76         /* Re-do sizing to get full correct info */
  77         size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  78
  79         flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  80
  81 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  82         /* monitor protection ON by default */
  83         flash_protect(FLAG_PROTECT_SET,
  84                       CONFIG_SYS_MONITOR_BASE,
  85                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  86                       &flash_info[0]);
  87 #endif
  88
  89 #ifdef  CONFIG_ENV_IS_IN_FLASH
  90         /* ENV protection ON by default */
  91         flash_protect(FLAG_PROTECT_SET,
  92                       CONFIG_ENV_ADDR,
  93                       CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  94                       &flash_info[0]);
  95 #endif
  96
  97         /* ICU862 Board has only one Flash Bank */
  98         flash_info[0].size = size_b0;
  99
 100         return size_b0;
 101
 102 }
 103
 104 /*-----------------------------------------------------------------------
 105  */
 106 static void flash_get_offsets (ulong base, flash_info_t *info)
 107 {
 108         int i;
 109
 110         /* set up sector start address table */
 111         if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
 112                 ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM033C)) {
 113                 /* set sector offsets for uniform sector type   */
 114                 for (i = 0; i < info->sector_count; i++) {
 115                         info->start[i] = base + (i * 0x00040000);
 116                 }
 117         }
 118 }
 119
 120 /*-----------------------------------------------------------------------
 121  */
 122 void flash_print_info  (flash_info_t *info)
 123 {
 124         int i;
 125
 126         if (info->flash_id == FLASH_UNKNOWN) {
 127                 puts ("missing or unknown FLASH type\n");
 128                 return;
 129         }
 130
 131         switch (info->flash_id & FLASH_VENDMASK) {
 132         case FLASH_MAN_AMD:     puts ("AMD ");          break;
 133         case FLASH_MAN_FUJ:     puts ("FUJITSU ");      break;
 134         case FLASH_MAN_BM:      puts ("BRIGHT MICRO "); break;
 135         default:                puts ("Unknown Vendor "); break;
 136         }
 137
 138         switch (info->flash_id & FLASH_TYPEMASK) {
 139         case FLASH_AM040:       puts ("29F040/29LV040 (4 Mbit, uniform sectors)\n");
 140                                 break;
 141         case FLASH_AM400B:      puts ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 142                                 break;
 143         case FLASH_AM400T:      puts ("AM29LV400T (4 Mbit, top boot sector)\n");
 144                                 break;
 145         case FLASH_AM800B:      puts ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 146                                 break;
 147         case FLASH_AM800T:      puts ("AM29LV800T (8 Mbit, top boot sector)\n");
 148                                 break;
 149         case FLASH_AM160B:      puts ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 150                                 break;
 151         case FLASH_AM160T:      puts ("AM29LV160T (16 Mbit, top boot sector)\n");
 152                                 break;
 153         case FLASH_AM320B:      puts ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 154                                 break;
 155         case FLASH_AM320T:      puts ("AM29LV320T (32 Mbit, top boot sector)\n");
 156                                 break;
 157         case FLASH_AM033C:      puts ("AM29LV033C (32 Mbit)\n");
 158                                 break;
 159         default:                puts ("Unknown Chip Type\n");
 160                                 break;
 161         }
 162
 163         printf ("  Size: %ld MB in %d Sectors\n",
 164                 info->size >> 20, info->sector_count);
 165
 166         puts ("  Sector Start Addresses:");
 167
 168         for (i=0; i<info->sector_count; ++i) {
 169                 if ((i % 5) == 0) {
 170                         puts ("\n   ");
 171                 }
 172
 173                 printf (" %08lX%s",
 174                         info->start[i],
 175                         info->protect[i] ? " (RO)" : "     "
 176                 );
 177         }
 178
 179         puts ("\n");
 180 }
 181
 182 /*-----------------------------------------------------------------------
 183  */
 184
 185 /*
 186  * The following code cannot be run from FLASH!
 187  */
 188
 189 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 190 {
 191         short i;
 192 #if 0
 193         ulong base = (ulong)addr;
 194 #endif
 195         uchar value;
 196
 197         /* Write auto select command: read Manufacturer ID */
 198 #if 0
 199         addr[0x0555] = 0x00AA00AA;
 200         addr[0x02AA] = 0x00550055;
 201         addr[0x0555] = 0x00900090;
 202 #else
 203         addr[0x0555] = 0xAAAAAAAA;
 204         addr[0x02AA] = 0x55555555;
 205         addr[0x0555] = 0x90909090;
 206 #endif
 207
 208         value = addr[0];
 209
 210         switch (value + (value << 16)) {
 211         case AMD_MANUFACT:
 212                 info->flash_id = FLASH_MAN_AMD;
 213                 break;
 214
 215         case FUJ_MANUFACT:
 216                 info->flash_id = FLASH_MAN_FUJ;
 217                 break;
 218
 219         default:
 220                 info->flash_id = FLASH_UNKNOWN;
 221                 info->sector_count = 0;
 222                 info->size = 0;
 223                 break;
 224         }
 225
 226         value = addr[1];                        /* device ID            */
 227
 228         switch ((unsigned long)value) {
 229         case AMD_ID_F040B:
 230                 info->flash_id += FLASH_AM040;
 231                 info->sector_count = 8;
 232                 info->size = 0x00200000;
 233                 break;                          /* => 2 MB              */
 234
 235         case AMD_ID_LV400T:
 236                 info->flash_id += FLASH_AM400T;
 237                 info->sector_count = 11;
 238                 info->size = 0x00100000;
 239                 break;                          /* => 1 MB              */
 240
 241         case AMD_ID_LV400B:
 242                 info->flash_id += FLASH_AM400B;
 243                 info->sector_count = 11;
 244                 info->size = 0x00100000;
 245                 break;                          /* => 1 MB              */
 246
 247         case AMD_ID_LV800T:
 248                 info->flash_id += FLASH_AM800T;
 249                 info->sector_count = 19;
 250                 info->size = 0x00200000;
 251                 break;                          /* => 2 MB              */
 252
 253         case AMD_ID_LV800B:
 254                 info->flash_id += FLASH_AM800B;
 255                 info->sector_count = 19;
 256                 info->size = 0x00200000;
 257                 break;                          /* => 2 MB              */
 258
 259         case AMD_ID_LV160T:
 260                 info->flash_id += FLASH_AM160T;
 261                 info->sector_count = 35;
 262                 info->size = 0x00400000;
 263                 break;                          /* => 4 MB              */
 264
 265         case AMD_ID_LV160B:
 266                 info->flash_id += FLASH_AM160B;
 267                 info->sector_count = 35;
 268                 info->size = 0x00400000;
 269                 break;                          /* => 4 MB              */
 270 #if 0   /* enable when device IDs are available */
 271         case AMD_ID_LV320T:
 272                 info->flash_id += FLASH_AM320T;
 273                 info->sector_count = 67;
 274                 info->size = 0x00800000;
 275                 break;                          /* => 8 MB              */
 276
 277         case AMD_ID_LV320B:
 278                 info->flash_id += FLASH_AM320B;
 279                 info->sector_count = 67;
 280                 info->size = 0x00800000;
 281                 break;                          /* => 8 MB              */
 282 #endif
 283         case AMD_ID_LV033C:
 284                 info->flash_id += FLASH_AM033C;
 285                 info->sector_count = 64;
 286                 info->size = 0x01000000;
 287                 break;                          /* => 16Mb              */
 288         default:
 289                 info->flash_id = FLASH_UNKNOWN;
 290                 return (0);                     /* => no or unknown flash */
 291
 292         }
 293
 294 #if 0
 295         /* set up sector start address table */
 296         if (info->flash_id & FLASH_BTYPE) {
 297                 /* set sector offsets for bottom boot block type        */
 298                 info->start[0] = base + 0x00000000;
 299                 info->start[1] = base + 0x00008000;
 300                 info->start[2] = base + 0x0000C000;
 301                 info->start[3] = base + 0x00010000;
 302                 for (i = 4; i < info->sector_count; i++) {
 303                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 304                 }
 305         } else {
 306                 /* set sector offsets for top boot block type           */
 307                 i = info->sector_count - 1;
 308                 info->start[i--] = base + info->size - 0x00008000;
 309                 info->start[i--] = base + info->size - 0x0000C000;
 310                 info->start[i--] = base + info->size - 0x00010000;
 311                 for (; i >= 0; i--) {
 312                         info->start[i] = base + i * 0x00020000;
 313                 }
 314         }
 315 #else
 316         flash_get_offsets ((ulong)addr, &flash_info[0]);
 317 #endif
 318
 319         /* check for protected sectors */
 320         for (i = 0; i < info->sector_count; i++) {
 321                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 322                 /* D0 = 1 if protected */
 323                 addr = (volatile unsigned long *)(info->start[i]);
 324 #if 1
 325                 /* We don't know why it happens, but on ICU Board       *
 326                  * for AMD29033C flash we need to resend the command of *
 327                  * reading flash protection for upper 8 Mb of flash     */
 328                 if ( i == 32 ) {
 329                         addr[0x0555] = 0xAAAAAAAA;
 330                         addr[0x02AA] = 0x55555555;
 331                         addr[0x0555] = 0x90909090;
 332                 }
 333 #endif
 334                 info->protect[i] = addr[2] & 1;
 335         }
 336
 337         /*
 338          * Prevent writes to uninitialized FLASH.
 339          */
 340         if (info->flash_id != FLASH_UNKNOWN) {
 341                 addr = (volatile unsigned long *)info->start[0];
 342 #if 0
 343                 *addr = 0x00F000F0;     /* reset bank */
 344 #else
 345                 *addr = 0xF0F0F0F0;     /* reset bank */
 346 #endif
 347         }
 348
 349         return (info->size);
 350 }
 351
 352
 353 /*-----------------------------------------------------------------------
 354  */
 355
 356 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 357 {
 358         vu_long *addr = (vu_long*)(info->start[0]);
 359         int flag, prot, sect, l_sect;
 360         ulong start, now, last;
 361
 362         if ((s_first < 0) || (s_first > s_last)) {
 363                 if (info->flash_id == FLASH_UNKNOWN) {
 364                         puts ("- missing\n");
 365                 } else {
 366                         puts ("- no sectors to erase\n");
 367                 }
 368                 return 1;
 369         }
 370
 371         if ((info->flash_id == FLASH_UNKNOWN) ||
 372             (info->flash_id > FLASH_AMD_COMP)) {
 373                 puts ("Can't erase unknown flash type - aborted\n");
 374                 return 1;
 375         }
 376
 377         prot = 0;
 378         for (sect=s_first; sect<=s_last; ++sect) {
 379                 if (info->protect[sect]) {
 380                         prot++;
 381                 }
 382         }
 383
 384         if (prot) {
 385                 printf ("- Warning: %d protected sectors will not be erased!\n",
 386                         prot);
 387         } else {
 388                 puts ("\n");
 389         }
 390
 391         l_sect = -1;
 392
 393         /* Disable interrupts which might cause a timeout here */
 394         flag = disable_interrupts();
 395
 396 #if 0
 397         addr[0x0555] = 0x00AA00AA;
 398         addr[0x02AA] = 0x00550055;
 399         addr[0x0555] = 0x00800080;
 400         addr[0x0555] = 0x00AA00AA;
 401         addr[0x02AA] = 0x00550055;
 402 #else
 403         addr[0x0555] = 0xAAAAAAAA;
 404         addr[0x02AA] = 0x55555555;
 405         addr[0x0555] = 0x80808080;
 406         addr[0x0555] = 0xAAAAAAAA;
 407         addr[0x02AA] = 0x55555555;
 408 #endif
 409
 410         /* Start erase on unprotected sectors */
 411         for (sect = s_first; sect<=s_last; sect++) {
 412                 if (info->protect[sect] == 0) { /* not protected */
 413                         addr = (vu_long*)(info->start[sect]);
 414 #if 0
 415                         addr[0] = 0x00300030;
 416 #else
 417                         addr[0] = 0x30303030;
 418 #endif
 419                         l_sect = sect;
 420                 }
 421         }
 422
 423         /* re-enable interrupts if necessary */
 424         if (flag)
 425                 enable_interrupts();
 426
 427         /* wait at least 80us - let's wait 1 ms */
 428         udelay (1000);
 429
 430         /*
 431          * We wait for the last triggered sector
 432          */
 433         if (l_sect < 0)
 434                 goto DONE;
 435
 436         start = get_timer (0);
 437         last  = start;
 438         addr = (vu_long*)(info->start[l_sect]);
 439 #if 0
 440         while ((addr[0] & 0x00800080) != 0x00800080)
 441 #else
 442         while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
 443 #endif
 444         {
 445                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 446                         puts ("Timeout\n");
 447                         return 1;
 448                 }
 449                 /* show that we're waiting */
 450                 if ((now - last) > 1000) {      /* every second */
 451                         putc ('.');
 452                         last = now;
 453                 }
 454         }
 455
 456 DONE:
 457         /* reset to read mode */
 458         addr = (volatile unsigned long *)info->start[0];
 459 #if 0
 460         addr[0] = 0x00F000F0;   /* reset bank */
 461 #else
 462         addr[0] = 0xF0F0F0F0;   /* reset bank */
 463 #endif
 464
 465         puts (" done\n");
 466         return 0;
 467 }
 468
 469 /*-----------------------------------------------------------------------
 470  * Copy memory to flash, returns:
 471  * 0 - OK
 472  * 1 - write timeout
 473  * 2 - Flash not erased
 474  */
 475
 476 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 477 {
 478         ulong cp, wp, data;
 479         int i, l, rc;
 480
 481         wp = (addr & ~3);       /* get lower word aligned address */
 482
 483         /*
 484          * handle unaligned start bytes
 485          */
 486         if ((l = addr - wp) != 0) {
 487                 data = 0;
 488                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 489                         data = (data << 8) | (*(uchar *)cp);
 490                 }
 491                 for (; i<4 && cnt>0; ++i) {
 492                         data = (data << 8) | *src++;
 493                         --cnt;
 494                         ++cp;
 495                 }
 496                 for (; cnt==0 && i<4; ++i, ++cp) {
 497                         data = (data << 8) | (*(uchar *)cp);
 498                 }
 499
 500                 if ((rc = write_word(info, wp, data)) != 0) {
 501                         return (rc);
 502                 }
 503                 wp += 4;
 504         }
 505
 506         /*
 507          * handle word aligned part
 508          */
 509         while (cnt >= 4) {
 510                 data = 0;
 511                 for (i=0; i<4; ++i) {
 512                         data = (data << 8) | *src++;
 513                 }
 514                 if ((rc = write_word(info, wp, data)) != 0) {
 515                         return (rc);
 516                 }
 517                 wp  += 4;
 518                 cnt -= 4;
 519         }
 520
 521         if (cnt == 0) {
 522                 return (0);
 523         }
 524
 525         /*
 526          * handle unaligned tail bytes
 527          */
 528         data = 0;
 529         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 530                 data = (data << 8) | *src++;
 531                 --cnt;
 532         }
 533         for (; i<4; ++i, ++cp) {
 534                 data = (data << 8) | (*(uchar *)cp);
 535         }
 536
 537         return (write_word(info, wp, data));
 538 }
 539
 540 /*-----------------------------------------------------------------------
 541  * Write a word to Flash, returns:
 542  * 0 - OK
 543  * 1 - write timeout
 544  * 2 - Flash not erased
 545  */
 546 static int write_word (flash_info_t *info, ulong dest, ulong data)
 547 {
 548         vu_long *addr = (vu_long*)(info->start[0]);
 549         ulong start;
 550         int flag;
 551
 552         /* Check if Flash is (sufficiently) erased */
 553         if ((*((vu_long *)dest) & data) != data) {
 554                 return (2);
 555         }
 556         /* Disable interrupts which might cause a timeout here */
 557         flag = disable_interrupts();
 558
 559 #if 0
 560         addr[0x0555] = 0x00AA00AA;
 561         addr[0x02AA] = 0x00550055;
 562         addr[0x0555] = 0x00A000A0;
 563 #else
 564         addr[0x0555] = 0xAAAAAAAA;
 565         addr[0x02AA] = 0x55555555;
 566         addr[0x0555] = 0xA0A0A0A0;
 567 #endif
 568
 569         *((vu_long *)dest) = data;
 570
 571         /* re-enable interrupts if necessary */
 572         if (flag)
 573                 enable_interrupts();
 574
 575         /* data polling for D7 */
 576         start = get_timer (0);
 577 #if 0
 578         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080))
 579 #else
 580         while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080))
 581 #endif
 582         {
 583                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 584                         return (1);
 585                 }
 586         }
 587         return (0);
 588 }
 589
 590 /*-----------------------------------------------------------------------
 591  */