board/netta2/flash.c

   1 /*
   2  * (C) Copyright 2000-2004
   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 /*-----------------------------------------------------------------------
  14  * Functions
  15  */
  16 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  17 static int write_byte(flash_info_t * info, ulong dest, uchar data);
  18 static void flash_get_offsets(ulong base, flash_info_t * info);
  19
  20 /*-----------------------------------------------------------------------
  21  */
  22
  23 unsigned long flash_init(void)
  24 {
  25         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
  26         volatile memctl8xx_t *memctl = &immap->im_memctl;
  27         unsigned long size;
  28         int i;
  29
  30         /* Init: no FLASHes known */
  31         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  32                 flash_info[i].flash_id = FLASH_UNKNOWN;
  33
  34         size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
  35
  36         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  37                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  38                         size, size << 20);
  39         }
  40
  41         /* Remap FLASH according to real size */
  42         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  43         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  44
  45         /* Re-do sizing to get full correct info */
  46         size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  47
  48         flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  49
  50         /* monitor protection ON by default */
  51         flash_protect(FLAG_PROTECT_SET,
  52                         CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  53                         &flash_info[0]);
  54
  55         flash_protect ( FLAG_PROTECT_SET,
  56                         CONFIG_ENV_ADDR,
  57                         CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
  58                         &flash_info[0]);
  59
  60 #ifdef CONFIG_ENV_ADDR_REDUND
  61         flash_protect ( FLAG_PROTECT_SET,
  62                         CONFIG_ENV_ADDR_REDUND,
  63                         CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
  64                         &flash_info[0]);
  65 #endif
  66
  67         flash_info[0].size = size;
  68
  69         return (size);
  70 }
  71
  72 /*-----------------------------------------------------------------------
  73  */
  74 static void flash_get_offsets(ulong base, flash_info_t * info)
  75 {
  76         int i;
  77
  78         /* set up sector start address table */
  79         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
  80                 for (i = 0; i < info->sector_count; i++) {
  81                         info->start[i] = base + (i * 0x00010000);
  82                 }
  83         } else if (info->flash_id & FLASH_BTYPE) {
  84                 /* set sector offsets for bottom boot block type    */
  85                 info->start[0] = base + 0x00000000;
  86                 info->start[1] = base + 0x00004000;
  87                 info->start[2] = base + 0x00006000;
  88                 info->start[3] = base + 0x00008000;
  89                 for (i = 4; i < info->sector_count; i++) {
  90                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
  91                 }
  92         } else {
  93                 /* set sector offsets for top boot block type       */
  94                 i = info->sector_count - 1;
  95                 info->start[i--] = base + info->size - 0x00004000;
  96                 info->start[i--] = base + info->size - 0x00006000;
  97                 info->start[i--] = base + info->size - 0x00008000;
  98                 for (; i >= 0; i--) {
  99                         info->start[i] = base + i * 0x00010000;
 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                 printf("missing or unknown FLASH type\n");
 112                 return;
 113         }
 114
 115         switch (info->flash_id & FLASH_VENDMASK) {
 116         case FLASH_MAN_AMD:
 117                 printf("AMD ");
 118                 break;
 119         case FLASH_MAN_FUJ:
 120                 printf("FUJITSU ");
 121                 break;
 122         case FLASH_MAN_MX:
 123                 printf("MXIC ");
 124                 break;
 125         default:
 126                 printf("Unknown Vendor ");
 127                 break;
 128         }
 129
 130         switch (info->flash_id & FLASH_TYPEMASK) {
 131         case FLASH_AM040:
 132                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 133                 break;
 134         case FLASH_AM400B:
 135                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 136                 break;
 137         case FLASH_AM400T:
 138                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 139                 break;
 140         case FLASH_AM800B:
 141                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 142                 break;
 143         case FLASH_AM800T:
 144                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 145                 break;
 146         case FLASH_AM160B:
 147                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 148                 break;
 149         case FLASH_AM160T:
 150                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 151                 break;
 152         case FLASH_AM320B:
 153                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 154                 break;
 155         case FLASH_AM320T:
 156                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 157                 break;
 158         default:
 159                 printf("Unknown Chip Type\n");
 160                 break;
 161         }
 162
 163         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 164
 165         printf("  Sector Start Addresses:");
 166         for (i = 0; i < info->sector_count; ++i) {
 167                 if ((i % 5) == 0)
 168                         printf("\n   ");
 169                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 170         }
 171         printf("\n");
 172 }
 173
 174 /*-----------------------------------------------------------------------
 175  */
 176
 177
 178 /*-----------------------------------------------------------------------
 179  */
 180
 181 /*
 182  * The following code cannot be run from FLASH!
 183  */
 184
 185 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 186 {
 187         short i;
 188         uchar mid;
 189         uchar pid;
 190         vu_char *caddr = (vu_char *) addr;
 191         ulong base = (ulong) addr;
 192
 193         /* Write auto select command: read Manufacturer ID */
 194         caddr[0x0555] = 0xAA;
 195         caddr[0x02AA] = 0x55;
 196         caddr[0x0555] = 0x90;
 197
 198         mid = caddr[0];
 199         switch (mid) {
 200         case (AMD_MANUFACT & 0xFF):
 201                 info->flash_id = FLASH_MAN_AMD;
 202                 break;
 203         case (FUJ_MANUFACT & 0xFF):
 204                 info->flash_id = FLASH_MAN_FUJ;
 205                 break;
 206         case (MX_MANUFACT & 0xFF):
 207                 info->flash_id = FLASH_MAN_MX;
 208                 break;
 209         case (STM_MANUFACT & 0xFF):
 210                 info->flash_id = FLASH_MAN_STM;
 211                 break;
 212         default:
 213                 info->flash_id = FLASH_UNKNOWN;
 214                 info->sector_count = 0;
 215                 info->size = 0;
 216                 return (0);                             /* no or unknown flash  */
 217         }
 218
 219         pid = caddr[1];                         /* device ID        */
 220         switch (pid) {
 221         case (AMD_ID_LV400T & 0xFF):
 222                 info->flash_id += FLASH_AM400T;
 223                 info->sector_count = 11;
 224                 info->size = 0x00080000;
 225                 break;                                  /* => 512 kB        */
 226
 227         case (AMD_ID_LV400B & 0xFF):
 228                 info->flash_id += FLASH_AM400B;
 229                 info->sector_count = 11;
 230                 info->size = 0x00080000;
 231                 break;                                  /* => 512 kB        */
 232
 233         case (AMD_ID_LV800T & 0xFF):
 234                 info->flash_id += FLASH_AM800T;
 235                 info->sector_count = 19;
 236                 info->size = 0x00100000;
 237                 break;                                  /* => 1 MB      */
 238
 239         case (AMD_ID_LV800B & 0xFF):
 240                 info->flash_id += FLASH_AM800B;
 241                 info->sector_count = 19;
 242                 info->size = 0x00100000;
 243                 break;                                  /* => 1 MB      */
 244
 245         case (AMD_ID_LV160T & 0xFF):
 246                 info->flash_id += FLASH_AM160T;
 247                 info->sector_count = 35;
 248                 info->size = 0x00200000;
 249                 break;                                  /* => 2 MB      */
 250
 251         case (AMD_ID_LV160B & 0xFF):
 252                 info->flash_id += FLASH_AM160B;
 253                 info->sector_count = 35;
 254                 info->size = 0x00200000;
 255                 break;                                  /* => 2 MB      */
 256
 257         case (AMD_ID_LV040B & 0xFF):
 258                 info->flash_id += FLASH_AM040;
 259                 info->sector_count = 8;
 260                 info->size = 0x00080000;
 261                 break;
 262
 263         case (STM_ID_M29W040B & 0xFF):
 264                 info->flash_id += FLASH_AM040;
 265                 info->sector_count = 8;
 266                 info->size = 0x00080000;
 267                 break;
 268
 269 #if 0                                                   /* enable when device IDs are available */
 270         case (AMD_ID_LV320T & 0xFF):
 271                 info->flash_id += FLASH_AM320T;
 272                 info->sector_count = 67;
 273                 info->size = 0x00400000;
 274                 break;                                  /* => 4 MB      */
 275
 276         case (AMD_ID_LV320B & 0xFF):
 277                 info->flash_id += FLASH_AM320B;
 278                 info->sector_count = 67;
 279                 info->size = 0x00400000;
 280                 break;                                  /* => 4 MB      */
 281 #endif
 282         default:
 283                 info->flash_id = FLASH_UNKNOWN;
 284                 return (0);                             /* => no or unknown flash */
 285
 286         }
 287
 288         printf(" ");
 289         /* set up sector start address table */
 290         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 291                 for (i = 0; i < info->sector_count; i++) {
 292                         info->start[i] = base + (i * 0x00010000);
 293                 }
 294         } else if (info->flash_id & FLASH_BTYPE) {
 295                 /* set sector offsets for bottom boot block type    */
 296                 info->start[0] = base + 0x00000000;
 297                 info->start[1] = base + 0x00004000;
 298                 info->start[2] = base + 0x00006000;
 299                 info->start[3] = base + 0x00008000;
 300                 for (i = 4; i < info->sector_count; i++) {
 301                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 302                 }
 303         } else {
 304                 /* set sector offsets for top boot block type       */
 305                 i = info->sector_count - 1;
 306                 info->start[i--] = base + info->size - 0x00004000;
 307                 info->start[i--] = base + info->size - 0x00006000;
 308                 info->start[i--] = base + info->size - 0x00008000;
 309                 for (; i >= 0; i--) {
 310                         info->start[i] = base + i * 0x00010000;
 311                 }
 312         }
 313
 314         /* check for protected sectors */
 315         for (i = 0; i < info->sector_count; i++) {
 316                 /* read sector protection: D0 = 1 if protected */
 317                 caddr = (volatile unsigned char *)(info->start[i]);
 318                 info->protect[i] = caddr[2] & 1;
 319         }
 320
 321         /*
 322          * Prevent writes to uninitialized FLASH.
 323          */
 324         if (info->flash_id != FLASH_UNKNOWN) {
 325                 caddr = (vu_char *) info->start[0];
 326
 327                 caddr[0x0555] = 0xAA;
 328                 caddr[0x02AA] = 0x55;
 329                 caddr[0x0555] = 0xF0;
 330
 331                 udelay(20000);
 332         }
 333
 334         return (info->size);
 335 }
 336
 337
 338 /*-----------------------------------------------------------------------
 339  */
 340
 341 int flash_erase(flash_info_t * info, int s_first, int s_last)
 342 {
 343         vu_char *addr = (vu_char *) (info->start[0]);
 344         int flag, prot, sect, l_sect;
 345         ulong start, now, last;
 346
 347         if ((s_first < 0) || (s_first > s_last)) {
 348                 if (info->flash_id == FLASH_UNKNOWN) {
 349                         printf("- missing\n");
 350                 } else {
 351                         printf("- no sectors to erase\n");
 352                 }
 353                 return 1;
 354         }
 355
 356         if ((info->flash_id == FLASH_UNKNOWN) ||
 357             (info->flash_id > FLASH_AMD_COMP)) {
 358                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 359                 return 1;
 360         }
 361
 362         prot = 0;
 363         for (sect = s_first; sect <= s_last; ++sect) {
 364                 if (info->protect[sect]) {
 365                         prot++;
 366                 }
 367         }
 368
 369         if (prot) {
 370                 printf("- Warning: %d protected sectors will not be erased!\n", prot);
 371         } else {
 372                 printf("\n");
 373         }
 374
 375         l_sect = -1;
 376
 377         /* Disable interrupts which might cause a timeout here */
 378         flag = disable_interrupts();
 379
 380         addr[0x0555] = 0xAA;
 381         addr[0x02AA] = 0x55;
 382         addr[0x0555] = 0x80;
 383         addr[0x0555] = 0xAA;
 384         addr[0x02AA] = 0x55;
 385
 386         /* Start erase on unprotected sectors */
 387         for (sect = s_first; sect <= s_last; sect++) {
 388                 if (info->protect[sect] == 0) { /* not protected */
 389                         addr = (vu_char *) (info->start[sect]);
 390                         addr[0] = 0x30;
 391                         l_sect = sect;
 392                 }
 393         }
 394
 395         /* re-enable interrupts if necessary */
 396         if (flag)
 397                 enable_interrupts();
 398
 399         /* wait at least 80us - let's wait 1 ms */
 400         udelay(1000);
 401
 402         /*
 403          * We wait for the last triggered sector
 404          */
 405         if (l_sect < 0)
 406                 goto DONE;
 407
 408         start = get_timer(0);
 409         last = start;
 410         addr = (vu_char *) (info->start[l_sect]);
 411         while ((addr[0] & 0x80) != 0x80) {
 412                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 413                         printf("Timeout\n");
 414                         return 1;
 415                 }
 416                 /* show that we're waiting */
 417                 if ((now - last) > 1000) {      /* every second */
 418                         putc('.');
 419                         last = now;
 420                 }
 421         }
 422
 423 DONE:
 424         /* reset to read mode */
 425         addr = (vu_char *) info->start[0];
 426         addr[0] = 0xF0;                         /* reset bank */
 427
 428         printf(" done\n");
 429         return 0;
 430 }
 431
 432 /*-----------------------------------------------------------------------
 433  * Copy memory to flash, returns:
 434  * 0 - OK
 435  * 1 - write timeout
 436  * 2 - Flash not erased
 437  */
 438
 439 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 440 {
 441         int rc;
 442
 443         while (cnt > 0) {
 444                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
 445                         return (rc);
 446                 }
 447                 --cnt;
 448         }
 449
 450         return (0);
 451 }
 452
 453 /*-----------------------------------------------------------------------
 454  * Write a word to Flash, returns:
 455  * 0 - OK
 456  * 1 - write timeout
 457  * 2 - Flash not erased
 458  */
 459 static int write_byte(flash_info_t * info, ulong dest, uchar data)
 460 {
 461         vu_char *addr = (vu_char *) (info->start[0]);
 462         ulong start;
 463         int flag;
 464
 465         /* Check if Flash is (sufficiently) erased */
 466         if ((*((vu_char *) dest) & data) != data) {
 467                 return (2);
 468         }
 469         /* Disable interrupts which might cause a timeout here */
 470         flag = disable_interrupts();
 471
 472         addr[0x0555] = 0xAA;
 473         addr[0x02AA] = 0x55;
 474         addr[0x0555] = 0xA0;
 475
 476         *((vu_char *) dest) = data;
 477
 478         /* re-enable interrupts if necessary */
 479         if (flag)
 480                 enable_interrupts();
 481
 482         /* data polling for D7 */
 483         start = get_timer(0);
 484         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 485                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 486                         return (1);
 487                 }
 488         }
 489         return (0);
 490 }