board/fads/flash.c

   1 /*
   2  * (C) Copyright 2000
   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 #define QUAD_ID(id)     ((((ulong)(id) & 0xFF) << 24) | \
  42                          (((ulong)(id) & 0xFF) << 16) | \
  43                          (((ulong)(id) & 0xFF) << 8)  | \
  44                          (((ulong)(id) & 0xFF) << 0)    \
  45                         )
  46
  47 /*-----------------------------------------------------------------------
  48  * Functions
  49  */
  50 static ulong flash_get_size (vu_long * addr, flash_info_t * info);
  51 static int write_word (flash_info_t * info, ulong dest, ulong data);
  52
  53 /*-----------------------------------------------------------------------
  54  */
  55 unsigned long flash_init (void)
  56 {
  57         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
  58         volatile memctl8xx_t *memctl = &immap->im_memctl;
  59         vu_long *bcsr = (vu_long *)BCSR_ADDR;
  60         unsigned long pd_size, total_size, bsize, or_am;
  61         int i;
  62
  63         /* Init: no FLASHes known */
  64         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  65                 flash_info[i].flash_id = FLASH_UNKNOWN;
  66                 flash_info[i].size = 0;
  67                 flash_info[i].sector_count = 0;
  68                 flash_info[i].start[0] = 0xFFFFFFFF; /* For TFTP */
  69         }
  70
  71         switch ((bcsr[2] & BCSR2_FLASH_PD_MASK) >> BCSR2_FLASH_PD_SHIFT) {
  72         case 2:
  73         case 4:
  74         case 6:
  75                 pd_size = 0x800000;
  76                 or_am = 0xFF800000;
  77                 break;
  78
  79         case 5:
  80         case 7:
  81                 pd_size = 0x400000;
  82                 or_am = 0xFFC00000;
  83                 break;
  84
  85         case 8:
  86                 pd_size = 0x200000;
  87                 or_am = 0xFFE00000;
  88                 break;
  89
  90         default:
  91                 pd_size = 0;
  92                 or_am = 0xFFE00000;
  93                 printf("## Unsupported flash detected by BCSR: 0x%08lX\n", bcsr[2]);
  94         }
  95
  96         total_size = 0;
  97         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS && total_size < pd_size; ++i) {
  98                 bsize = flash_get_size((vu_long *)(CONFIG_SYS_FLASH_BASE + total_size),
  99                                        &flash_info[i]);
 100
 101                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 102                         printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 103                                 i, bsize, bsize >> 20);
 104                 }
 105
 106                 total_size += bsize;
 107         }
 108
 109         if (total_size != pd_size) {
 110                 printf("## Detected flash size %lu conflicts with PD data %lu\n",
 111                        total_size, pd_size);
 112         }
 113
 114         /* Remap FLASH according to real size */
 115         memctl->memc_or0 = or_am | CONFIG_SYS_OR_TIMING_FLASH;
 116
 117         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS && flash_info[i].size != 0; ++i) {
 118 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 119                 /* monitor protection ON by default */
 120                 if (CONFIG_SYS_MONITOR_BASE >= flash_info[i].start[0])
 121                         flash_protect (FLAG_PROTECT_SET,
 122                                        CONFIG_SYS_MONITOR_BASE,
 123                                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
 124                                        &flash_info[i]);
 125 #endif
 126
 127 #ifdef  CONFIG_ENV_IS_IN_FLASH
 128                 /* ENV protection ON by default */
 129                 if (CONFIG_ENV_ADDR >= flash_info[i].start[0])
 130                         flash_protect (FLAG_PROTECT_SET,
 131                                        CONFIG_ENV_ADDR,
 132                                        CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 133                                        &flash_info[i]);
 134 #endif
 135         }
 136
 137         return total_size;
 138 }
 139
 140 /*-----------------------------------------------------------------------
 141  */
 142 void flash_print_info (flash_info_t * info)
 143 {
 144         int i;
 145
 146         if (info->flash_id == FLASH_UNKNOWN) {
 147                 printf ("missing or unknown FLASH type\n");
 148                 return;
 149         }
 150
 151         switch (info->flash_id & FLASH_VENDMASK) {
 152         case FLASH_MAN_AMD:
 153                 printf ("AMD ");
 154                 break;
 155         case FLASH_MAN_FUJ:
 156                 printf ("FUJITSU ");
 157                 break;
 158         case FLASH_MAN_BM:
 159                 printf ("BRIGHT MICRO ");
 160                 break;
 161         default:
 162                 printf ("Unknown Vendor ");
 163                 break;
 164         }
 165
 166         switch (info->flash_id & FLASH_TYPEMASK) {
 167         case FLASH_AM040:
 168                 printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
 169                 break;
 170         case FLASH_AM080:
 171                 printf ("29F080 or 29LV080 (8 Mbit, uniform sectors)\n");
 172                 break;
 173         case FLASH_AM400B:
 174                 printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 175                 break;
 176         case FLASH_AM400T:
 177                 printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 178                 break;
 179         case FLASH_AM800B:
 180                 printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 181                 break;
 182         case FLASH_AM800T:
 183                 printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 184                 break;
 185         case FLASH_AM160B:
 186                 printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 187                 break;
 188         case FLASH_AM160T:
 189                 printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 190                 break;
 191         case FLASH_AM320B:
 192                 printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 193                 break;
 194         case FLASH_AM320T:
 195                 printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 196                 break;
 197         default:
 198                 printf ("Unknown Chip Type\n");
 199                 break;
 200         }
 201
 202         printf ("  Size: %ld MB in %d Sectors\n", info->size >> 20,
 203                 info->sector_count);
 204
 205         printf ("  Sector Start Addresses:");
 206
 207         for (i = 0; i < info->sector_count; ++i) {
 208                 if ((i % 5) == 0) {
 209                         printf ("\n   ");
 210                 }
 211
 212                 printf (" %08lX%s",
 213                         info->start[i], info->protect[i] ? " (RO)" : "     ");
 214         }
 215
 216         printf ("\n");
 217 }
 218
 219 /*-----------------------------------------------------------------------
 220  * The following code can not run from flash!
 221  */
 222 static ulong flash_get_size (vu_long * addr, flash_info_t * info)
 223 {
 224         short i;
 225
 226         /* Write auto select command: read Manufacturer ID */
 227         addr[0x0555] = 0xAAAAAAAA;
 228         addr[0x02AA] = 0x55555555;
 229         addr[0x0555] = 0x90909090;
 230
 231         switch (addr[0]) {
 232         case QUAD_ID(AMD_MANUFACT):
 233                 info->flash_id = FLASH_MAN_AMD;
 234                 break;
 235
 236         case QUAD_ID(FUJ_MANUFACT):
 237                 info->flash_id = FLASH_MAN_FUJ;
 238                 break;
 239
 240         default:
 241                 info->flash_id = FLASH_UNKNOWN;
 242                 info->sector_count = 0;
 243                 info->size = 0;
 244                 break;
 245         }
 246
 247         switch (addr[1]) {      /* device ID            */
 248         case QUAD_ID(AMD_ID_F040B):
 249         case QUAD_ID(AMD_ID_LV040B):
 250                 info->flash_id += FLASH_AM040;
 251                 info->sector_count = 8;
 252                 info->size = 0x00200000;
 253                 break;          /* => 2 MB              */
 254
 255         case QUAD_ID(AMD_ID_F080B):
 256                 info->flash_id += FLASH_AM080;
 257                 info->sector_count = 16;
 258                 info->size = 0x00400000;
 259                 break;          /* => 4 MB              */
 260 #if 0
 261         case AMD_ID_LV400T:
 262                 info->flash_id += FLASH_AM400T;
 263                 info->sector_count = 11;
 264                 info->size = 0x00100000;
 265                 break;          /* => 1 MB              */
 266
 267         case AMD_ID_LV400B:
 268                 info->flash_id += FLASH_AM400B;
 269                 info->sector_count = 11;
 270                 info->size = 0x00100000;
 271                 break;          /* => 1 MB              */
 272
 273         case AMD_ID_LV800T:
 274                 info->flash_id += FLASH_AM800T;
 275                 info->sector_count = 19;
 276                 info->size = 0x00200000;
 277                 break;          /* => 2 MB              */
 278
 279         case AMD_ID_LV800B:
 280                 info->flash_id += FLASH_AM800B;
 281                 info->sector_count = 19;
 282                 info->size = 0x00200000;
 283                 break;          /* => 2 MB              */
 284
 285         case AMD_ID_LV160T:
 286                 info->flash_id += FLASH_AM160T;
 287                 info->sector_count = 35;
 288                 info->size = 0x00400000;
 289                 break;          /* => 4 MB              */
 290
 291         case AMD_ID_LV160B:
 292                 info->flash_id += FLASH_AM160B;
 293                 info->sector_count = 35;
 294                 info->size = 0x00400000;
 295                 break;          /* => 4 MB              */
 296
 297         case AMD_ID_LV320T:
 298                 info->flash_id += FLASH_AM320T;
 299                 info->sector_count = 67;
 300                 info->size = 0x00800000;
 301                 break;          /* => 8 MB              */
 302
 303         case AMD_ID_LV320B:
 304                 info->flash_id += FLASH_AM320B;
 305                 info->sector_count = 67;
 306                 info->size = 0x00800000;
 307                 break;          /* => 8 MB              */
 308 #endif /* 0 */
 309         default:
 310                 info->flash_id = FLASH_UNKNOWN;
 311                 return (0);     /* => no or unknown flash */
 312         }
 313
 314 #if 0
 315         /* set up sector start address table */
 316         if (info->flash_id & FLASH_BTYPE) {
 317                 /* set sector offsets for bottom boot block type        */
 318                 info->start[0] = base + 0x00000000;
 319                 info->start[1] = base + 0x00008000;
 320                 info->start[2] = base + 0x0000C000;
 321                 info->start[3] = base + 0x00010000;
 322                 for (i = 4; i < info->sector_count; i++) {
 323                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 324                 }
 325         } else {
 326                 /* set sector offsets for top boot block type           */
 327                 i = info->sector_count - 1;
 328                 info->start[i--] = base + info->size - 0x00008000;
 329                 info->start[i--] = base + info->size - 0x0000C000;
 330                 info->start[i--] = base + info->size - 0x00010000;
 331                 for (; i >= 0; i--) {
 332                         info->start[i] = base + i * 0x00020000;
 333                 }
 334         }
 335 #else
 336         /* set sector offsets for uniform sector type */
 337         for (i = 0; i < info->sector_count; i++)
 338                 info->start[i] = (ulong)addr + (i * 0x00040000);
 339 #endif
 340
 341         /* check for protected sectors */
 342         for (i = 0; i < info->sector_count; i++) {
 343                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 344                 /* D0 = 1 if protected */
 345                 addr = (volatile unsigned long *) (info->start[i]);
 346                 info->protect[i] = addr[2] & 1;
 347         }
 348
 349         if (info->flash_id != FLASH_UNKNOWN) {
 350                 addr = (volatile unsigned long *) info->start[0];
 351                 *addr = 0xF0F0F0F0;     /* reset bank */
 352         }
 353
 354         return (info->size);
 355 }
 356
 357 /*-----------------------------------------------------------------------
 358  */
 359 int flash_erase (flash_info_t * info, int s_first, int s_last)
 360 {
 361         vu_long *addr = (vu_long *) (info->start[0]);
 362         int flag, prot, sect, l_sect;
 363         ulong start, now, last;
 364
 365         if ((s_first < 0) || (s_first > s_last)) {
 366                 if (info->flash_id == FLASH_UNKNOWN) {
 367                         printf ("- missing\n");
 368                 } else {
 369                         printf ("- no sectors to erase\n");
 370                 }
 371                 return ERR_INVAL;
 372         }
 373
 374         if ((info->flash_id == FLASH_UNKNOWN) ||
 375             (info->flash_id > FLASH_AMD_COMP)) {
 376                 printf ("Can't erase unknown flash type - aborted\n");
 377                 return ERR_UNKNOWN_FLASH_TYPE;
 378         }
 379
 380         prot = 0;
 381         for (sect = s_first; sect <= s_last; ++sect) {
 382                 if (info->protect[sect]) {
 383                         prot++;
 384                 }
 385         }
 386
 387         if (prot) {
 388                 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 389         } else {
 390                 printf ("\n");
 391         }
 392
 393         l_sect = -1;
 394
 395         /* Disable interrupts which might cause a timeout here */
 396         flag = disable_interrupts ();
 397
 398         addr[0x0555] = 0xAAAAAAAA;
 399         addr[0x02AA] = 0x55555555;
 400         addr[0x0555] = 0x80808080;
 401         addr[0x0555] = 0xAAAAAAAA;
 402         addr[0x02AA] = 0x55555555;
 403
 404         /* Start erase on unprotected sectors */
 405         for (sect = s_first; sect <= s_last; sect++) {
 406                 if (info->protect[sect] == 0) { /* not protected */
 407                         addr = (vu_long *) (info->start[sect]);
 408                         addr[0] = 0x30303030;
 409                         l_sect = sect;
 410                 }
 411         }
 412
 413         /* re-enable interrupts if necessary */
 414         if (flag)
 415                 enable_interrupts ();
 416
 417         /* wait at least 80us - let's wait 1 ms */
 418         udelay (1000);
 419
 420         /*
 421          * We wait for the last triggered sector
 422          */
 423         if (l_sect < 0)
 424                 goto DONE;
 425
 426         start = get_timer (0);
 427         last = start;
 428         addr = (vu_long *) (info->start[l_sect]);
 429         while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
 430         {
 431                 if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 432                         printf ("Timeout\n");
 433                         return ERR_TIMOUT;
 434                 }
 435                 /* show that we're waiting */
 436                 if ((now - last) > 1000) {      /* every second */
 437                         putc ('.');
 438                         last = now;
 439                 }
 440         }
 441
 442       DONE:
 443         /* reset to read mode */
 444         addr = (volatile unsigned long *) info->start[0];
 445         addr[0] = 0xF0F0F0F0;   /* reset bank */
 446
 447         printf (" done\n");
 448
 449         return 0;
 450 }
 451
 452 /*-----------------------------------------------------------------------
 453  * Copy memory to flash, returns:
 454  * 0 - OK
 455  * 1 - write timeout
 456  * 2 - Flash not erased
 457  */
 458 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 459 {
 460         ulong cp, wp, data;
 461         int i, l, rc;
 462
 463         wp = (addr & ~3);       /* get lower word aligned address */
 464
 465         /*
 466          * handle unaligned start bytes
 467          */
 468         if ((l = addr - wp) != 0) {
 469                 data = 0;
 470                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 471                         data = (data << 8) | (*(uchar *) cp);
 472                 }
 473                 for (; i < 4 && cnt > 0; ++i) {
 474                         data = (data << 8) | *src++;
 475                         --cnt;
 476                         ++cp;
 477                 }
 478                 for (; cnt == 0 && i < 4; ++i, ++cp) {
 479                         data = (data << 8) | (*(uchar *) cp);
 480                 }
 481
 482                 if ((rc = write_word (info, wp, data)) != 0) {
 483                         return (rc);
 484                 }
 485                 wp += 4;
 486         }
 487
 488         /*
 489          * handle word aligned part
 490          */
 491         while (cnt >= 4) {
 492                 data = 0;
 493                 for (i = 0; i < 4; ++i) {
 494                         data = (data << 8) | *src++;
 495                 }
 496                 if ((rc = write_word (info, wp, data)) != 0) {
 497                         return (rc);
 498                 }
 499                 wp += 4;
 500                 cnt -= 4;
 501         }
 502
 503         if (cnt == 0) {
 504                 return (0);
 505         }
 506
 507         /*
 508          * handle unaligned tail bytes
 509          */
 510         data = 0;
 511         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 512                 data = (data << 8) | *src++;
 513                 --cnt;
 514         }
 515         for (; i < 4; ++i, ++cp) {
 516                 data = (data << 8) | (*(uchar *) cp);
 517         }
 518
 519         return (write_word (info, wp, data));
 520 }
 521
 522 /*-----------------------------------------------------------------------
 523  * Write a word to Flash, returns:
 524  * 0 - OK
 525  * 1 - write timeout
 526  * 2 - Flash not erased
 527  */
 528 static int write_word (flash_info_t * info, ulong dest, ulong data)
 529 {
 530         vu_long *addr = (vu_long *) (info->start[0]);
 531         ulong start;
 532         int flag;
 533
 534         /* Check if Flash is (sufficiently) erased */
 535         if ((*((vu_long *) dest) & data) != data) {
 536                 return ERR_NOT_ERASED;
 537         }
 538         /* Disable interrupts which might cause a timeout here */
 539         flag = disable_interrupts ();
 540
 541         addr[0x0555] = 0xAAAAAAAA;
 542         addr[0x02AA] = 0x55555555;
 543         addr[0x0555] = 0xA0A0A0A0;
 544
 545         *((vu_long *) dest) = data;
 546
 547         /* re-enable interrupts if necessary */
 548         if (flag)
 549                 enable_interrupts ();
 550
 551         /* data polling for D7 */
 552         start = get_timer (0);
 553         while ((*((vu_long *) dest) & 0x80808080) != (data & 0x80808080))
 554         {
 555                 if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 556                         return ERR_TIMOUT;
 557                 }
 558         }
 559         return (0);
 560 }