git.sur5r.net Git - u-boot/blob - board/netta/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", size, size << 20);
  38         }
  39
  40         /* Remap FLASH according to real size */
  41         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  42         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  43
  44         /* Re-do sizing to get full correct info */
  45         size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  46
  47         flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  48
  49         /* monitor protection ON by default */
  50         flash_protect(FLAG_PROTECT_SET,
  51                         CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  52                         &flash_info[0]);
  53
  54         flash_protect ( FLAG_PROTECT_SET,
  55                         CONFIG_ENV_ADDR,
  56                         CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
  57                         &flash_info[0]);
  58
  59 #ifdef CONFIG_ENV_ADDR_REDUND
  60         flash_protect ( FLAG_PROTECT_SET,
  61                         CONFIG_ENV_ADDR_REDUND,
  62                         CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
  63                         &flash_info[0]);
  64 #endif
  65
  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  */
 107 void flash_print_info(flash_info_t * info)
 108 {
 109         int i;
 110
 111         if (info->flash_id == FLASH_UNKNOWN) {
 112                 printf("missing or unknown FLASH type\n");
 113                 return;
 114         }
 115
 116         switch (info->flash_id & FLASH_VENDMASK) {
 117         case FLASH_MAN_AMD:
 118                 printf("AMD ");
 119                 break;
 120         case FLASH_MAN_FUJ:
 121                 printf("FUJITSU ");
 122                 break;
 123         case FLASH_MAN_MX:
 124                 printf("MXIC ");
 125                 break;
 126         default:
 127                 printf("Unknown Vendor ");
 128                 break;
 129         }
 130
 131         switch (info->flash_id & FLASH_TYPEMASK) {
 132         case FLASH_AM040:
 133                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 134                 break;
 135         case FLASH_AM400B:
 136                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 137                 break;
 138         case FLASH_AM400T:
 139                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 140                 break;
 141         case FLASH_AM800B:
 142                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 143                 break;
 144         case FLASH_AM800T:
 145                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 146                 break;
 147         case FLASH_AM160B:
 148                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 149                 break;
 150         case FLASH_AM160T:
 151                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 152                 break;
 153         case FLASH_AM320B:
 154                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 155                 break;
 156         case FLASH_AM320T:
 157                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 158                 break;
 159         default:
 160                 printf("Unknown Chip Type\n");
 161                 break;
 162         }
 163
 164         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 165
 166         printf("  Sector Start Addresses:");
 167         for (i = 0; i < info->sector_count; ++i) {
 168                 if ((i % 5) == 0)
 169                         printf("\n   ");
 170                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 171         }
 172         printf("\n");
 173 }
 174
 175 /*-----------------------------------------------------------------------
 176  */
 177
 178
 179 /*-----------------------------------------------------------------------
 180  */
 181
 182 /*
 183  * The following code cannot be run from FLASH!
 184  */
 185
 186 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 187 {
 188         short i;
 189         uchar mid;
 190         uchar pid;
 191         vu_char *caddr = (vu_char *) addr;
 192         ulong base = (ulong) addr;
 193
 194
 195         /* Write auto select command: read Manufacturer ID */
 196         caddr[0x0555] = 0xAA;
 197         caddr[0x02AA] = 0x55;
 198         caddr[0x0555] = 0x90;
 199
 200         mid = caddr[0];
 201         switch (mid) {
 202         case (AMD_MANUFACT & 0xFF):
 203                 info->flash_id = FLASH_MAN_AMD;
 204                 break;
 205         case (FUJ_MANUFACT & 0xFF):
 206                 info->flash_id = FLASH_MAN_FUJ;
 207                 break;
 208         case (MX_MANUFACT & 0xFF):
 209                 info->flash_id = FLASH_MAN_MX;
 210                 break;
 211         case (STM_MANUFACT & 0xFF):
 212                 info->flash_id = FLASH_MAN_STM;
 213                 break;
 214         default:
 215                 info->flash_id = FLASH_UNKNOWN;
 216                 info->sector_count = 0;
 217                 info->size = 0;
 218                 return (0);                             /* no or unknown flash  */
 219         }
 220
 221         pid = caddr[1];                         /* device ID        */
 222         switch (pid) {
 223         case (AMD_ID_LV400T & 0xFF):
 224                 info->flash_id += FLASH_AM400T;
 225                 info->sector_count = 11;
 226                 info->size = 0x00080000;
 227                 break;                                  /* => 512 kB        */
 228
 229         case (AMD_ID_LV400B & 0xFF):
 230                 info->flash_id += FLASH_AM400B;
 231                 info->sector_count = 11;
 232                 info->size = 0x00080000;
 233                 break;                                  /* => 512 kB        */
 234
 235         case (AMD_ID_LV800T & 0xFF):
 236                 info->flash_id += FLASH_AM800T;
 237                 info->sector_count = 19;
 238                 info->size = 0x00100000;
 239                 break;                                  /* => 1 MB      */
 240
 241         case (AMD_ID_LV800B & 0xFF):
 242                 info->flash_id += FLASH_AM800B;
 243                 info->sector_count = 19;
 244                 info->size = 0x00100000;
 245                 break;                                  /* => 1 MB      */
 246
 247         case (AMD_ID_LV160T & 0xFF):
 248                 info->flash_id += FLASH_AM160T;
 249                 info->sector_count = 35;
 250                 info->size = 0x00200000;
 251                 break;                                  /* => 2 MB      */
 252
 253         case (AMD_ID_LV160B & 0xFF):
 254                 info->flash_id += FLASH_AM160B;
 255                 info->sector_count = 35;
 256                 info->size = 0x00200000;
 257                 break;                                  /* => 2 MB      */
 258
 259         case (AMD_ID_LV040B & 0xFF):
 260                 info->flash_id += FLASH_AM040;
 261                 info->sector_count = 8;
 262                 info->size = 0x00080000;
 263                 break;
 264
 265         case (STM_ID_M29W040B & 0xFF):
 266                 info->flash_id += FLASH_AM040;
 267                 info->sector_count = 8;
 268                 info->size = 0x00080000;
 269                 break;
 270
 271 #if 0                                                   /* enable when device IDs are available */
 272         case (AMD_ID_LV320T & 0xFF):
 273                 info->flash_id += FLASH_AM320T;
 274                 info->sector_count = 67;
 275                 info->size = 0x00400000;
 276                 break;                                  /* => 4 MB      */
 277
 278         case (AMD_ID_LV320B & 0xFF):
 279                 info->flash_id += FLASH_AM320B;
 280                 info->sector_count = 67;
 281                 info->size = 0x00400000;
 282                 break;                                  /* => 4 MB      */
 283 #endif
 284         default:
 285                 info->flash_id = FLASH_UNKNOWN;
 286                 return (0);                             /* => no or unknown flash */
 287
 288         }
 289
 290         printf(" ");
 291         /* set up sector start address table */
 292         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 293                 for (i = 0; i < info->sector_count; i++) {
 294                         info->start[i] = base + (i * 0x00010000);
 295                 }
 296         } else 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 + 0x00004000;
 300                 info->start[2] = base + 0x00006000;
 301                 info->start[3] = base + 0x00008000;
 302                 for (i = 4; i < info->sector_count; i++) {
 303                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 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 - 0x00004000;
 309                 info->start[i--] = base + info->size - 0x00006000;
 310                 info->start[i--] = base + info->size - 0x00008000;
 311                 for (; i >= 0; i--) {
 312                         info->start[i] = base + i * 0x00010000;
 313                 }
 314         }
 315
 316         /* check for protected sectors */
 317         for (i = 0; i < info->sector_count; i++) {
 318                 /* read sector protection: D0 = 1 if protected */
 319                 caddr = (volatile unsigned char *)(info->start[i]);
 320                 info->protect[i] = caddr[2] & 1;
 321         }
 322
 323         /*
 324          * Prevent writes to uninitialized FLASH.
 325          */
 326         if (info->flash_id != FLASH_UNKNOWN) {
 327                 caddr = (vu_char *) info->start[0];
 328
 329                 caddr[0x0555] = 0xAA;
 330                 caddr[0x02AA] = 0x55;
 331                 caddr[0x0555] = 0xF0;
 332
 333                 udelay(20000);
 334         }
 335
 336         return (info->size);
 337 }
 338
 339
 340 /*-----------------------------------------------------------------------
 341  */
 342
 343 int flash_erase(flash_info_t * info, int s_first, int s_last)
 344 {
 345         vu_char *addr = (vu_char *) (info->start[0]);
 346         int flag, prot, sect, l_sect;
 347         ulong start, now, last;
 348
 349         if ((s_first < 0) || (s_first > s_last)) {
 350                 if (info->flash_id == FLASH_UNKNOWN) {
 351                         printf("- missing\n");
 352                 } else {
 353                         printf("- no sectors to erase\n");
 354                 }
 355                 return 1;
 356         }
 357
 358         if ((info->flash_id == FLASH_UNKNOWN) ||
 359             (info->flash_id > FLASH_AMD_COMP)) {
 360                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 361                 return 1;
 362         }
 363
 364         prot = 0;
 365         for (sect = s_first; sect <= s_last; ++sect) {
 366                 if (info->protect[sect]) {
 367                         prot++;
 368                 }
 369         }
 370
 371         if (prot) {
 372                 printf("- Warning: %d protected sectors will not be erased!\n", prot);
 373         } else {
 374                 printf("\n");
 375         }
 376
 377         l_sect = -1;
 378
 379         /* Disable interrupts which might cause a timeout here */
 380         flag = disable_interrupts();
 381
 382         addr[0x0555] = 0xAA;
 383         addr[0x02AA] = 0x55;
 384         addr[0x0555] = 0x80;
 385         addr[0x0555] = 0xAA;
 386         addr[0x02AA] = 0x55;
 387
 388         /* Start erase on unprotected sectors */
 389         for (sect = s_first; sect <= s_last; sect++) {
 390                 if (info->protect[sect] == 0) { /* not protected */
 391                         addr = (vu_char *) (info->start[sect]);
 392                         addr[0] = 0x30;
 393                         l_sect = sect;
 394                 }
 395         }
 396
 397         /* re-enable interrupts if necessary */
 398         if (flag)
 399                 enable_interrupts();
 400
 401         /* wait at least 80us - let's wait 1 ms */
 402         udelay(1000);
 403
 404         /*
 405          * We wait for the last triggered sector
 406          */
 407         if (l_sect < 0)
 408                 goto DONE;
 409
 410         start = get_timer(0);
 411         last = start;
 412         addr = (vu_char *) (info->start[l_sect]);
 413         while ((addr[0] & 0x80) != 0x80) {
 414                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 415                         printf("Timeout\n");
 416                         return 1;
 417                 }
 418                 /* show that we're waiting */
 419                 if ((now - last) > 1000) {      /* every second */
 420                         putc('.');
 421                         last = now;
 422                 }
 423         }
 424
 425   DONE:
 426         /* reset to read mode */
 427         addr = (vu_char *) info->start[0];
 428         addr[0] = 0xF0;                         /* reset bank */
 429
 430         printf(" done\n");
 431         return 0;
 432 }
 433
 434 /*-----------------------------------------------------------------------
 435  * Copy memory to flash, returns:
 436  * 0 - OK
 437  * 1 - write timeout
 438  * 2 - Flash not erased
 439  */
 440
 441 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 442 {
 443         int rc;
 444
 445         while (cnt > 0) {
 446                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
 447                         return (rc);
 448                 }
 449                 --cnt;
 450         }
 451
 452         return (0);
 453 }
 454
 455 /*-----------------------------------------------------------------------
 456  * Write a word to Flash, returns:
 457  * 0 - OK
 458  * 1 - write timeout
 459  * 2 - Flash not erased
 460  */
 461 static int write_byte(flash_info_t * info, ulong dest, uchar data)
 462 {
 463         vu_char *addr = (vu_char *) (info->start[0]);
 464         ulong start;
 465         int flag;
 466
 467         /* Check if Flash is (sufficiently) erased */
 468         if ((*((vu_char *) dest) & data) != data) {
 469                 return (2);
 470         }
 471         /* Disable interrupts which might cause a timeout here */
 472         flag = disable_interrupts();
 473
 474         addr[0x0555] = 0xAA;
 475         addr[0x02AA] = 0x55;
 476         addr[0x0555] = 0xA0;
 477
 478         *((vu_char *) dest) = data;
 479
 480         /* re-enable interrupts if necessary */
 481         if (flag)
 482                 enable_interrupts();
 483
 484         /* data polling for D7 */
 485         start = get_timer(0);
 486         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 487                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 488                         return (1);
 489                 }
 490         }
 491         return (0);
 492 }