board/netta/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[CONFIG_SYS_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 *) CONFIG_SYS_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 < CONFIG_SYS_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", size, size << 20);
  54         }
  55
  56         /* Remap FLASH according to real size */
  57         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  58         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  59
  60         /* Re-do sizing to get full correct info */
  61         size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  62
  63         flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  64
  65         /* monitor protection ON by default */
  66         flash_protect(FLAG_PROTECT_SET,
  67                         CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  68                         &flash_info[0]);
  69
  70         flash_protect ( FLAG_PROTECT_SET,
  71                         CONFIG_ENV_ADDR,
  72                         CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
  73                         &flash_info[0]);
  74
  75 #ifdef CONFIG_ENV_ADDR_REDUND
  76         flash_protect ( FLAG_PROTECT_SET,
  77                         CONFIG_ENV_ADDR_REDUND,
  78                         CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE_REDUND - 1,
  79                         &flash_info[0]);
  80 #endif
  81
  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  */
 123 void flash_print_info(flash_info_t * info)
 124 {
 125         int i;
 126
 127         if (info->flash_id == FLASH_UNKNOWN) {
 128                 printf("missing or unknown FLASH type\n");
 129                 return;
 130         }
 131
 132         switch (info->flash_id & FLASH_VENDMASK) {
 133         case FLASH_MAN_AMD:
 134                 printf("AMD ");
 135                 break;
 136         case FLASH_MAN_FUJ:
 137                 printf("FUJITSU ");
 138                 break;
 139         case FLASH_MAN_MX:
 140                 printf("MXIC ");
 141                 break;
 142         default:
 143                 printf("Unknown Vendor ");
 144                 break;
 145         }
 146
 147         switch (info->flash_id & FLASH_TYPEMASK) {
 148         case FLASH_AM040:
 149                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 150                 break;
 151         case FLASH_AM400B:
 152                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 153                 break;
 154         case FLASH_AM400T:
 155                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 156                 break;
 157         case FLASH_AM800B:
 158                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 159                 break;
 160         case FLASH_AM800T:
 161                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 162                 break;
 163         case FLASH_AM160B:
 164                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 165                 break;
 166         case FLASH_AM160T:
 167                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 168                 break;
 169         case FLASH_AM320B:
 170                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 171                 break;
 172         case FLASH_AM320T:
 173                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 174                 break;
 175         default:
 176                 printf("Unknown Chip Type\n");
 177                 break;
 178         }
 179
 180         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 181
 182         printf("  Sector Start Addresses:");
 183         for (i = 0; i < info->sector_count; ++i) {
 184                 if ((i % 5) == 0)
 185                         printf("\n   ");
 186                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 187         }
 188         printf("\n");
 189 }
 190
 191 /*-----------------------------------------------------------------------
 192  */
 193
 194
 195 /*-----------------------------------------------------------------------
 196  */
 197
 198 /*
 199  * The following code cannot be run from FLASH!
 200  */
 201
 202 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 203 {
 204         short i;
 205         uchar mid;
 206         uchar pid;
 207         vu_char *caddr = (vu_char *) addr;
 208         ulong base = (ulong) addr;
 209
 210
 211         /* Write auto select command: read Manufacturer ID */
 212         caddr[0x0555] = 0xAA;
 213         caddr[0x02AA] = 0x55;
 214         caddr[0x0555] = 0x90;
 215
 216         mid = caddr[0];
 217         switch (mid) {
 218         case (AMD_MANUFACT & 0xFF):
 219                 info->flash_id = FLASH_MAN_AMD;
 220                 break;
 221         case (FUJ_MANUFACT & 0xFF):
 222                 info->flash_id = FLASH_MAN_FUJ;
 223                 break;
 224         case (MX_MANUFACT & 0xFF):
 225                 info->flash_id = FLASH_MAN_MX;
 226                 break;
 227         case (STM_MANUFACT & 0xFF):
 228                 info->flash_id = FLASH_MAN_STM;
 229                 break;
 230         default:
 231                 info->flash_id = FLASH_UNKNOWN;
 232                 info->sector_count = 0;
 233                 info->size = 0;
 234                 return (0);                             /* no or unknown flash  */
 235         }
 236
 237         pid = caddr[1];                         /* device ID        */
 238         switch (pid) {
 239         case (AMD_ID_LV400T & 0xFF):
 240                 info->flash_id += FLASH_AM400T;
 241                 info->sector_count = 11;
 242                 info->size = 0x00080000;
 243                 break;                                  /* => 512 kB        */
 244
 245         case (AMD_ID_LV400B & 0xFF):
 246                 info->flash_id += FLASH_AM400B;
 247                 info->sector_count = 11;
 248                 info->size = 0x00080000;
 249                 break;                                  /* => 512 kB        */
 250
 251         case (AMD_ID_LV800T & 0xFF):
 252                 info->flash_id += FLASH_AM800T;
 253                 info->sector_count = 19;
 254                 info->size = 0x00100000;
 255                 break;                                  /* => 1 MB      */
 256
 257         case (AMD_ID_LV800B & 0xFF):
 258                 info->flash_id += FLASH_AM800B;
 259                 info->sector_count = 19;
 260                 info->size = 0x00100000;
 261                 break;                                  /* => 1 MB      */
 262
 263         case (AMD_ID_LV160T & 0xFF):
 264                 info->flash_id += FLASH_AM160T;
 265                 info->sector_count = 35;
 266                 info->size = 0x00200000;
 267                 break;                                  /* => 2 MB      */
 268
 269         case (AMD_ID_LV160B & 0xFF):
 270                 info->flash_id += FLASH_AM160B;
 271                 info->sector_count = 35;
 272                 info->size = 0x00200000;
 273                 break;                                  /* => 2 MB      */
 274
 275         case (AMD_ID_LV040B & 0xFF):
 276                 info->flash_id += FLASH_AM040;
 277                 info->sector_count = 8;
 278                 info->size = 0x00080000;
 279                 break;
 280
 281         case (STM_ID_M29W040B & 0xFF):
 282                 info->flash_id += FLASH_AM040;
 283                 info->sector_count = 8;
 284                 info->size = 0x00080000;
 285                 break;
 286
 287 #if 0                                                   /* enable when device IDs are available */
 288         case (AMD_ID_LV320T & 0xFF):
 289                 info->flash_id += FLASH_AM320T;
 290                 info->sector_count = 67;
 291                 info->size = 0x00400000;
 292                 break;                                  /* => 4 MB      */
 293
 294         case (AMD_ID_LV320B & 0xFF):
 295                 info->flash_id += FLASH_AM320B;
 296                 info->sector_count = 67;
 297                 info->size = 0x00400000;
 298                 break;                                  /* => 4 MB      */
 299 #endif
 300         default:
 301                 info->flash_id = FLASH_UNKNOWN;
 302                 return (0);                             /* => no or unknown flash */
 303
 304         }
 305
 306         printf(" ");
 307         /* set up sector start address table */
 308         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 309                 for (i = 0; i < info->sector_count; i++) {
 310                         info->start[i] = base + (i * 0x00010000);
 311                 }
 312         } else if (info->flash_id & FLASH_BTYPE) {
 313                 /* set sector offsets for bottom boot block type    */
 314                 info->start[0] = base + 0x00000000;
 315                 info->start[1] = base + 0x00004000;
 316                 info->start[2] = base + 0x00006000;
 317                 info->start[3] = base + 0x00008000;
 318                 for (i = 4; i < info->sector_count; i++) {
 319                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 320                 }
 321         } else {
 322                 /* set sector offsets for top boot block type       */
 323                 i = info->sector_count - 1;
 324                 info->start[i--] = base + info->size - 0x00004000;
 325                 info->start[i--] = base + info->size - 0x00006000;
 326                 info->start[i--] = base + info->size - 0x00008000;
 327                 for (; i >= 0; i--) {
 328                         info->start[i] = base + i * 0x00010000;
 329                 }
 330         }
 331
 332         /* check for protected sectors */
 333         for (i = 0; i < info->sector_count; i++) {
 334                 /* read sector protection: D0 = 1 if protected */
 335                 caddr = (volatile unsigned char *)(info->start[i]);
 336                 info->protect[i] = caddr[2] & 1;
 337         }
 338
 339         /*
 340          * Prevent writes to uninitialized FLASH.
 341          */
 342         if (info->flash_id != FLASH_UNKNOWN) {
 343                 caddr = (vu_char *) info->start[0];
 344
 345                 caddr[0x0555] = 0xAA;
 346                 caddr[0x02AA] = 0x55;
 347                 caddr[0x0555] = 0xF0;
 348
 349                 udelay(20000);
 350         }
 351
 352         return (info->size);
 353 }
 354
 355
 356 /*-----------------------------------------------------------------------
 357  */
 358
 359 int flash_erase(flash_info_t * info, int s_first, int s_last)
 360 {
 361         vu_char *addr = (vu_char *) (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 1;
 372         }
 373
 374         if ((info->flash_id == FLASH_UNKNOWN) ||
 375             (info->flash_id > FLASH_AMD_COMP)) {
 376                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 377                 return 1;
 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] = 0xAA;
 399         addr[0x02AA] = 0x55;
 400         addr[0x0555] = 0x80;
 401         addr[0x0555] = 0xAA;
 402         addr[0x02AA] = 0x55;
 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_char *) (info->start[sect]);
 408                         addr[0] = 0x30;
 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_char *) (info->start[l_sect]);
 429         while ((addr[0] & 0x80) != 0x80) {
 430                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 431                         printf("Timeout\n");
 432                         return 1;
 433                 }
 434                 /* show that we're waiting */
 435                 if ((now - last) > 1000) {      /* every second */
 436                         putc('.');
 437                         last = now;
 438                 }
 439         }
 440
 441   DONE:
 442         /* reset to read mode */
 443         addr = (vu_char *) info->start[0];
 444         addr[0] = 0xF0;                         /* reset bank */
 445
 446         printf(" done\n");
 447         return 0;
 448 }
 449
 450 /*-----------------------------------------------------------------------
 451  * Copy memory to flash, returns:
 452  * 0 - OK
 453  * 1 - write timeout
 454  * 2 - Flash not erased
 455  */
 456
 457 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 458 {
 459         int rc;
 460
 461         while (cnt > 0) {
 462                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
 463                         return (rc);
 464                 }
 465                 --cnt;
 466         }
 467
 468         return (0);
 469 }
 470
 471 /*-----------------------------------------------------------------------
 472  * Write a word to Flash, returns:
 473  * 0 - OK
 474  * 1 - write timeout
 475  * 2 - Flash not erased
 476  */
 477 static int write_byte(flash_info_t * info, ulong dest, uchar data)
 478 {
 479         vu_char *addr = (vu_char *) (info->start[0]);
 480         ulong start;
 481         int flag;
 482
 483         /* Check if Flash is (sufficiently) erased */
 484         if ((*((vu_char *) dest) & data) != data) {
 485                 return (2);
 486         }
 487         /* Disable interrupts which might cause a timeout here */
 488         flag = disable_interrupts();
 489
 490         addr[0x0555] = 0xAA;
 491         addr[0x02AA] = 0x55;
 492         addr[0x0555] = 0xA0;
 493
 494         *((vu_char *) dest) = data;
 495
 496         /* re-enable interrupts if necessary */
 497         if (flag)
 498                 enable_interrupts();
 499
 500         /* data polling for D7 */
 501         start = get_timer(0);
 502         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 503                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 504                         return (1);
 505                 }
 506         }
 507         return (0);
 508 }