board/netta2/flash.c

   1 /*
   2  * (C) Copyright 2000-2004
   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[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips    */
  28
  29 /*-----------------------------------------------------------------------
  30  * Functions
  31  */
  32 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  33 static int write_byte(flash_info_t * info, ulong dest, uchar data);
  34 static void flash_get_offsets(ulong base, flash_info_t * info);
  35
  36 /*-----------------------------------------------------------------------
  37  */
  38
  39 unsigned long flash_init(void)
  40 {
  41         volatile immap_t *immap = (immap_t *) CFG_IMMR;
  42         volatile memctl8xx_t *memctl = &immap->im_memctl;
  43         unsigned long size;
  44         int i;
  45
  46         /* Init: no FLASHes known */
  47         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i)
  48                 flash_info[i].flash_id = FLASH_UNKNOWN;
  49
  50         size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
  51
  52         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  53                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  54                         size, size << 20);
  55         }
  56
  57         /* Remap FLASH according to real size */
  58         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  59         memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  60
  61         /* Re-do sizing to get full correct info */
  62         size = flash_get_size((vu_long *) CFG_FLASH_BASE, &flash_info[0]);
  63
  64         flash_get_offsets(CFG_FLASH_BASE, &flash_info[0]);
  65
  66         /* monitor protection ON by default */
  67         flash_protect(FLAG_PROTECT_SET,
  68                         CFG_FLASH_BASE, CFG_FLASH_BASE + monitor_flash_len - 1,
  69                         &flash_info[0]);
  70
  71         flash_protect ( FLAG_PROTECT_SET,
  72                         CFG_ENV_ADDR,
  73                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
  74                         &flash_info[0]);
  75
  76 #ifdef CFG_ENV_ADDR_REDUND
  77         flash_protect ( FLAG_PROTECT_SET,
  78                         CFG_ENV_ADDR_REDUND,
  79                         CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
  80                         &flash_info[0]);
  81 #endif
  82
  83         flash_info[0].size = size;
  84
  85         return (size);
  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                 for (i = 0; i < info->sector_count; i++) {
  97                         info->start[i] = base + (i * 0x00010000);
  98                 }
  99         } else if (info->flash_id & FLASH_BTYPE) {
 100                 /* set sector offsets for bottom boot block type    */
 101                 info->start[0] = base + 0x00000000;
 102                 info->start[1] = base + 0x00004000;
 103                 info->start[2] = base + 0x00006000;
 104                 info->start[3] = base + 0x00008000;
 105                 for (i = 4; i < info->sector_count; i++) {
 106                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 107                 }
 108         } else {
 109                 /* set sector offsets for top boot block type       */
 110                 i = info->sector_count - 1;
 111                 info->start[i--] = base + info->size - 0x00004000;
 112                 info->start[i--] = base + info->size - 0x00006000;
 113                 info->start[i--] = base + info->size - 0x00008000;
 114                 for (; i >= 0; i--) {
 115                         info->start[i] = base + i * 0x00010000;
 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                 printf("missing or unknown FLASH type\n");
 128                 return;
 129         }
 130
 131         switch (info->flash_id & FLASH_VENDMASK) {
 132         case FLASH_MAN_AMD:
 133                 printf("AMD ");
 134                 break;
 135         case FLASH_MAN_FUJ:
 136                 printf("FUJITSU ");
 137                 break;
 138         case FLASH_MAN_MX:
 139                 printf("MXIC ");
 140                 break;
 141         default:
 142                 printf("Unknown Vendor ");
 143                 break;
 144         }
 145
 146         switch (info->flash_id & FLASH_TYPEMASK) {
 147         case FLASH_AM040:
 148                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 149                 break;
 150         case FLASH_AM400B:
 151                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 152                 break;
 153         case FLASH_AM400T:
 154                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 155                 break;
 156         case FLASH_AM800B:
 157                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 158                 break;
 159         case FLASH_AM800T:
 160                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 161                 break;
 162         case FLASH_AM160B:
 163                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 164                 break;
 165         case FLASH_AM160T:
 166                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 167                 break;
 168         case FLASH_AM320B:
 169                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 170                 break;
 171         case FLASH_AM320T:
 172                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 173                 break;
 174         default:
 175                 printf("Unknown Chip Type\n");
 176                 break;
 177         }
 178
 179         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 180
 181         printf("  Sector Start Addresses:");
 182         for (i = 0; i < info->sector_count; ++i) {
 183                 if ((i % 5) == 0)
 184                         printf("\n   ");
 185                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 186         }
 187         printf("\n");
 188 }
 189
 190 /*-----------------------------------------------------------------------
 191  */
 192
 193
 194 /*-----------------------------------------------------------------------
 195  */
 196
 197 /*
 198  * The following code cannot be run from FLASH!
 199  */
 200
 201 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 202 {
 203         short i;
 204         uchar mid;
 205         uchar pid;
 206         vu_char *caddr = (vu_char *) addr;
 207         ulong base = (ulong) addr;
 208
 209         /* Write auto select command: read Manufacturer ID */
 210         caddr[0x0555] = 0xAA;
 211         caddr[0x02AA] = 0x55;
 212         caddr[0x0555] = 0x90;
 213
 214         mid = caddr[0];
 215         switch (mid) {
 216         case (AMD_MANUFACT & 0xFF):
 217                 info->flash_id = FLASH_MAN_AMD;
 218                 break;
 219         case (FUJ_MANUFACT & 0xFF):
 220                 info->flash_id = FLASH_MAN_FUJ;
 221                 break;
 222         case (MX_MANUFACT & 0xFF):
 223                 info->flash_id = FLASH_MAN_MX;
 224                 break;
 225         case (STM_MANUFACT & 0xFF):
 226                 info->flash_id = FLASH_MAN_STM;
 227                 break;
 228         default:
 229                 info->flash_id = FLASH_UNKNOWN;
 230                 info->sector_count = 0;
 231                 info->size = 0;
 232                 return (0);                             /* no or unknown flash  */
 233         }
 234
 235         pid = caddr[1];                         /* device ID        */
 236         switch (pid) {
 237         case (AMD_ID_LV400T & 0xFF):
 238                 info->flash_id += FLASH_AM400T;
 239                 info->sector_count = 11;
 240                 info->size = 0x00080000;
 241                 break;                                  /* => 512 kB        */
 242
 243         case (AMD_ID_LV400B & 0xFF):
 244                 info->flash_id += FLASH_AM400B;
 245                 info->sector_count = 11;
 246                 info->size = 0x00080000;
 247                 break;                                  /* => 512 kB        */
 248
 249         case (AMD_ID_LV800T & 0xFF):
 250                 info->flash_id += FLASH_AM800T;
 251                 info->sector_count = 19;
 252                 info->size = 0x00100000;
 253                 break;                                  /* => 1 MB      */
 254
 255         case (AMD_ID_LV800B & 0xFF):
 256                 info->flash_id += FLASH_AM800B;
 257                 info->sector_count = 19;
 258                 info->size = 0x00100000;
 259                 break;                                  /* => 1 MB      */
 260
 261         case (AMD_ID_LV160T & 0xFF):
 262                 info->flash_id += FLASH_AM160T;
 263                 info->sector_count = 35;
 264                 info->size = 0x00200000;
 265                 break;                                  /* => 2 MB      */
 266
 267         case (AMD_ID_LV160B & 0xFF):
 268                 info->flash_id += FLASH_AM160B;
 269                 info->sector_count = 35;
 270                 info->size = 0x00200000;
 271                 break;                                  /* => 2 MB      */
 272
 273         case (AMD_ID_LV040B & 0xFF):
 274                 info->flash_id += FLASH_AM040;
 275                 info->sector_count = 8;
 276                 info->size = 0x00080000;
 277                 break;
 278
 279         case (STM_ID_M29W040B & 0xFF):
 280                 info->flash_id += FLASH_AM040;
 281                 info->sector_count = 8;
 282                 info->size = 0x00080000;
 283                 break;
 284
 285 #if 0                                                   /* enable when device IDs are available */
 286         case (AMD_ID_LV320T & 0xFF):
 287                 info->flash_id += FLASH_AM320T;
 288                 info->sector_count = 67;
 289                 info->size = 0x00400000;
 290                 break;                                  /* => 4 MB      */
 291
 292         case (AMD_ID_LV320B & 0xFF):
 293                 info->flash_id += FLASH_AM320B;
 294                 info->sector_count = 67;
 295                 info->size = 0x00400000;
 296                 break;                                  /* => 4 MB      */
 297 #endif
 298         default:
 299                 info->flash_id = FLASH_UNKNOWN;
 300                 return (0);                             /* => no or unknown flash */
 301
 302         }
 303
 304         printf(" ");
 305         /* set up sector start address table */
 306         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 307                 for (i = 0; i < info->sector_count; i++) {
 308                         info->start[i] = base + (i * 0x00010000);
 309                 }
 310         } else if (info->flash_id & FLASH_BTYPE) {
 311                 /* set sector offsets for bottom boot block type    */
 312                 info->start[0] = base + 0x00000000;
 313                 info->start[1] = base + 0x00004000;
 314                 info->start[2] = base + 0x00006000;
 315                 info->start[3] = base + 0x00008000;
 316                 for (i = 4; i < info->sector_count; i++) {
 317                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 318                 }
 319         } else {
 320                 /* set sector offsets for top boot block type       */
 321                 i = info->sector_count - 1;
 322                 info->start[i--] = base + info->size - 0x00004000;
 323                 info->start[i--] = base + info->size - 0x00006000;
 324                 info->start[i--] = base + info->size - 0x00008000;
 325                 for (; i >= 0; i--) {
 326                         info->start[i] = base + i * 0x00010000;
 327                 }
 328         }
 329
 330         /* check for protected sectors */
 331         for (i = 0; i < info->sector_count; i++) {
 332                 /* read sector protection: D0 = 1 if protected */
 333                 caddr = (volatile unsigned char *)(info->start[i]);
 334                 info->protect[i] = caddr[2] & 1;
 335         }
 336
 337         /*
 338          * Prevent writes to uninitialized FLASH.
 339          */
 340         if (info->flash_id != FLASH_UNKNOWN) {
 341                 caddr = (vu_char *) info->start[0];
 342
 343                 caddr[0x0555] = 0xAA;
 344                 caddr[0x02AA] = 0x55;
 345                 caddr[0x0555] = 0xF0;
 346
 347                 udelay(20000);
 348         }
 349
 350         return (info->size);
 351 }
 352
 353
 354 /*-----------------------------------------------------------------------
 355  */
 356
 357 int flash_erase(flash_info_t * info, int s_first, int s_last)
 358 {
 359         vu_char *addr = (vu_char *) (info->start[0]);
 360         int flag, prot, sect, l_sect;
 361         ulong start, now, last;
 362
 363         if ((s_first < 0) || (s_first > s_last)) {
 364                 if (info->flash_id == FLASH_UNKNOWN) {
 365                         printf("- missing\n");
 366                 } else {
 367                         printf("- no sectors to erase\n");
 368                 }
 369                 return 1;
 370         }
 371
 372         if ((info->flash_id == FLASH_UNKNOWN) ||
 373             (info->flash_id > FLASH_AMD_COMP)) {
 374                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 375                 return 1;
 376         }
 377
 378         prot = 0;
 379         for (sect = s_first; sect <= s_last; ++sect) {
 380                 if (info->protect[sect]) {
 381                         prot++;
 382                 }
 383         }
 384
 385         if (prot) {
 386                 printf("- Warning: %d protected sectors will not be erased!\n", prot);
 387         } else {
 388                 printf("\n");
 389         }
 390
 391         l_sect = -1;
 392
 393         /* Disable interrupts which might cause a timeout here */
 394         flag = disable_interrupts();
 395
 396         addr[0x0555] = 0xAA;
 397         addr[0x02AA] = 0x55;
 398         addr[0x0555] = 0x80;
 399         addr[0x0555] = 0xAA;
 400         addr[0x02AA] = 0x55;
 401
 402         /* Start erase on unprotected sectors */
 403         for (sect = s_first; sect <= s_last; sect++) {
 404                 if (info->protect[sect] == 0) { /* not protected */
 405                         addr = (vu_char *) (info->start[sect]);
 406                         addr[0] = 0x30;
 407                         l_sect = sect;
 408                 }
 409         }
 410
 411         /* re-enable interrupts if necessary */
 412         if (flag)
 413                 enable_interrupts();
 414
 415         /* wait at least 80us - let's wait 1 ms */
 416         udelay(1000);
 417
 418         /*
 419          * We wait for the last triggered sector
 420          */
 421         if (l_sect < 0)
 422                 goto DONE;
 423
 424         start = get_timer(0);
 425         last = start;
 426         addr = (vu_char *) (info->start[l_sect]);
 427         while ((addr[0] & 0x80) != 0x80) {
 428                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 429                         printf("Timeout\n");
 430                         return 1;
 431                 }
 432                 /* show that we're waiting */
 433                 if ((now - last) > 1000) {      /* every second */
 434                         putc('.');
 435                         last = now;
 436                 }
 437         }
 438
 439 DONE:
 440         /* reset to read mode */
 441         addr = (vu_char *) info->start[0];
 442         addr[0] = 0xF0;                         /* reset bank */
 443
 444         printf(" done\n");
 445         return 0;
 446 }
 447
 448 /*-----------------------------------------------------------------------
 449  * Copy memory to flash, returns:
 450  * 0 - OK
 451  * 1 - write timeout
 452  * 2 - Flash not erased
 453  */
 454
 455 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 456 {
 457         int rc;
 458
 459         while (cnt > 0) {
 460                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
 461                         return (rc);
 462                 }
 463                 --cnt;
 464         }
 465
 466         return (0);
 467 }
 468
 469 /*-----------------------------------------------------------------------
 470  * Write a word to Flash, returns:
 471  * 0 - OK
 472  * 1 - write timeout
 473  * 2 - Flash not erased
 474  */
 475 static int write_byte(flash_info_t * info, ulong dest, uchar data)
 476 {
 477         vu_char *addr = (vu_char *) (info->start[0]);
 478         ulong start;
 479         int flag;
 480
 481         /* Check if Flash is (sufficiently) erased */
 482         if ((*((vu_char *) dest) & data) != data) {
 483                 return (2);
 484         }
 485         /* Disable interrupts which might cause a timeout here */
 486         flag = disable_interrupts();
 487
 488         addr[0x0555] = 0xAA;
 489         addr[0x02AA] = 0x55;
 490         addr[0x0555] = 0xA0;
 491
 492         *((vu_char *) dest) = data;
 493
 494         /* re-enable interrupts if necessary */
 495         if (flag)
 496                 enable_interrupts();
 497
 498         /* data polling for D7 */
 499         start = get_timer(0);
 500         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 501                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 502                         return (1);
 503                 }
 504         }
 505         return (0);
 506 }