board/netphone/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 #if CONFIG_NETPHONE_VERSION == 2
  45         unsigned long size1;
  46 #endif
  47         int i;
  48
  49         /* Init: no FLASHes known */
  50         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i)
  51                 flash_info[i].flash_id = FLASH_UNKNOWN;
  52
  53         size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
  54
  55         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  56                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  57                         size, size << 20);
  58         }
  59
  60         /* Remap FLASH according to real size */
  61         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  62         memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  63
  64         /* Re-do sizing to get full correct info */
  65         size = flash_get_size((vu_long *) CFG_FLASH_BASE, &flash_info[0]);
  66
  67         flash_get_offsets(CFG_FLASH_BASE, &flash_info[0]);
  68
  69         /* monitor protection ON by default */
  70         flash_protect(FLAG_PROTECT_SET,
  71                         CFG_FLASH_BASE, CFG_FLASH_BASE + monitor_flash_len - 1,
  72                         &flash_info[0]);
  73
  74         flash_protect ( FLAG_PROTECT_SET,
  75                         CFG_ENV_ADDR,
  76                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
  77                         &flash_info[0]);
  78
  79 #ifdef CFG_ENV_ADDR_REDUND
  80         flash_protect ( FLAG_PROTECT_SET,
  81                         CFG_ENV_ADDR_REDUND,
  82                         CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
  83                         &flash_info[0]);
  84 #endif
  85
  86         flash_info[0].size = size;
  87
  88 #if CONFIG_NETPHONE_VERSION == 2
  89         size1 = flash_get_size((vu_long *) FLASH_BASE4_PRELIM, &flash_info[1]);
  90
  91         if (flash_info[1].flash_id == FLASH_UNKNOWN && size1 > 0) {
  92                 printf("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n", size1, size1 << 20);
  93         }
  94
  95         /* Remap FLASH according to real size */
  96         memctl->memc_or4 = CFG_OR_TIMING_FLASH | (-size1 & 0xFFFF8000);
  97         memctl->memc_br4 = (CFG_FLASH_BASE4 & BR_BA_MSK) | (memctl->memc_br4 & ~(BR_BA_MSK));
  98
  99         /* Re-do sizing to get full correct info */
 100         size1 = flash_get_size((vu_long *) CFG_FLASH_BASE4, &flash_info[1]);
 101
 102         flash_get_offsets(CFG_FLASH_BASE4, &flash_info[1]);
 103
 104         size += size1;
 105 #endif
 106
 107         return (size);
 108 }
 109
 110 /*-----------------------------------------------------------------------
 111  */
 112 static void flash_get_offsets(ulong base, flash_info_t * info)
 113 {
 114         int i;
 115
 116         /* set up sector start address table */
 117         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 118                 for (i = 0; i < info->sector_count; i++) {
 119                         info->start[i] = base + (i * 0x00010000);
 120                 }
 121         } else if (info->flash_id & FLASH_BTYPE) {
 122                 /* set sector offsets for bottom boot block type    */
 123                 info->start[0] = base + 0x00000000;
 124                 info->start[1] = base + 0x00004000;
 125                 info->start[2] = base + 0x00006000;
 126                 info->start[3] = base + 0x00008000;
 127                 for (i = 4; i < info->sector_count; i++) {
 128                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 129                 }
 130         } else {
 131                 /* set sector offsets for top boot block type       */
 132                 i = info->sector_count - 1;
 133                 info->start[i--] = base + info->size - 0x00004000;
 134                 info->start[i--] = base + info->size - 0x00006000;
 135                 info->start[i--] = base + info->size - 0x00008000;
 136                 for (; i >= 0; i--) {
 137                         info->start[i] = base + i * 0x00010000;
 138                 }
 139         }
 140 }
 141
 142 /*-----------------------------------------------------------------------
 143  */
 144 void flash_print_info(flash_info_t * info)
 145 {
 146         int i;
 147
 148         if (info->flash_id == FLASH_UNKNOWN) {
 149                 printf("missing or unknown FLASH type\n");
 150                 return;
 151         }
 152
 153         switch (info->flash_id & FLASH_VENDMASK) {
 154         case FLASH_MAN_AMD:
 155                 printf("AMD ");
 156                 break;
 157         case FLASH_MAN_FUJ:
 158                 printf("FUJITSU ");
 159                 break;
 160         case FLASH_MAN_MX:
 161                 printf("MXIC ");
 162                 break;
 163         default:
 164                 printf("Unknown Vendor ");
 165                 break;
 166         }
 167
 168         switch (info->flash_id & FLASH_TYPEMASK) {
 169         case FLASH_AM040:
 170                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 171                 break;
 172         case FLASH_AM400B:
 173                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 174                 break;
 175         case FLASH_AM400T:
 176                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 177                 break;
 178         case FLASH_AM800B:
 179                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 180                 break;
 181         case FLASH_AM800T:
 182                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 183                 break;
 184         case FLASH_AM160B:
 185                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 186                 break;
 187         case FLASH_AM160T:
 188                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 189                 break;
 190         case FLASH_AM320B:
 191                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 192                 break;
 193         case FLASH_AM320T:
 194                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 195                 break;
 196         default:
 197                 printf("Unknown Chip Type\n");
 198                 break;
 199         }
 200
 201         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 202
 203         printf("  Sector Start Addresses:");
 204         for (i = 0; i < info->sector_count; ++i) {
 205                 if ((i % 5) == 0)
 206                         printf("\n   ");
 207                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 208         }
 209         printf("\n");
 210 }
 211
 212 /*-----------------------------------------------------------------------
 213  */
 214
 215
 216 /*-----------------------------------------------------------------------
 217  */
 218
 219 /*
 220  * The following code cannot be run from FLASH!
 221  */
 222
 223 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 224 {
 225         short i;
 226         uchar mid;
 227         uchar pid;
 228         vu_char *caddr = (vu_char *) addr;
 229         ulong base = (ulong) addr;
 230
 231         /* Write auto select command: read Manufacturer ID */
 232         caddr[0x0555] = 0xAA;
 233         caddr[0x02AA] = 0x55;
 234         caddr[0x0555] = 0x90;
 235
 236         mid = caddr[0];
 237         switch (mid) {
 238         case (AMD_MANUFACT & 0xFF):
 239                 info->flash_id = FLASH_MAN_AMD;
 240                 break;
 241         case (FUJ_MANUFACT & 0xFF):
 242                 info->flash_id = FLASH_MAN_FUJ;
 243                 break;
 244         case (MX_MANUFACT & 0xFF):
 245                 info->flash_id = FLASH_MAN_MX;
 246                 break;
 247         case (STM_MANUFACT & 0xFF):
 248                 info->flash_id = FLASH_MAN_STM;
 249                 break;
 250         default:
 251                 info->flash_id = FLASH_UNKNOWN;
 252                 info->sector_count = 0;
 253                 info->size = 0;
 254                 return (0);                             /* no or unknown flash  */
 255         }
 256
 257         pid = caddr[1];                         /* device ID        */
 258         switch (pid) {
 259         case (AMD_ID_LV400T & 0xFF):
 260                 info->flash_id += FLASH_AM400T;
 261                 info->sector_count = 11;
 262                 info->size = 0x00080000;
 263                 break;                                  /* => 512 kB        */
 264
 265         case (AMD_ID_LV400B & 0xFF):
 266                 info->flash_id += FLASH_AM400B;
 267                 info->sector_count = 11;
 268                 info->size = 0x00080000;
 269                 break;                                  /* => 512 kB        */
 270
 271         case (AMD_ID_LV800T & 0xFF):
 272                 info->flash_id += FLASH_AM800T;
 273                 info->sector_count = 19;
 274                 info->size = 0x00100000;
 275                 break;                                  /* => 1 MB      */
 276
 277         case (AMD_ID_LV800B & 0xFF):
 278                 info->flash_id += FLASH_AM800B;
 279                 info->sector_count = 19;
 280                 info->size = 0x00100000;
 281                 break;                                  /* => 1 MB      */
 282
 283         case (AMD_ID_LV160T & 0xFF):
 284                 info->flash_id += FLASH_AM160T;
 285                 info->sector_count = 35;
 286                 info->size = 0x00200000;
 287                 break;                                  /* => 2 MB      */
 288
 289         case (AMD_ID_LV160B & 0xFF):
 290                 info->flash_id += FLASH_AM160B;
 291                 info->sector_count = 35;
 292                 info->size = 0x00200000;
 293                 break;                                  /* => 2 MB      */
 294
 295         case (AMD_ID_LV040B & 0xFF):
 296                 info->flash_id += FLASH_AM040;
 297                 info->sector_count = 8;
 298                 info->size = 0x00080000;
 299                 break;
 300
 301         case (STM_ID_M29W040B & 0xFF):
 302                 info->flash_id += FLASH_AM040;
 303                 info->sector_count = 8;
 304                 info->size = 0x00080000;
 305                 break;
 306
 307 #if 0                                                   /* enable when device IDs are available */
 308         case (AMD_ID_LV320T & 0xFF):
 309                 info->flash_id += FLASH_AM320T;
 310                 info->sector_count = 67;
 311                 info->size = 0x00400000;
 312                 break;                                  /* => 4 MB      */
 313
 314         case (AMD_ID_LV320B & 0xFF):
 315                 info->flash_id += FLASH_AM320B;
 316                 info->sector_count = 67;
 317                 info->size = 0x00400000;
 318                 break;                                  /* => 4 MB      */
 319 #endif
 320         default:
 321                 info->flash_id = FLASH_UNKNOWN;
 322                 return (0);                             /* => no or unknown flash */
 323
 324         }
 325
 326         printf(" ");
 327         /* set up sector start address table */
 328         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 329                 for (i = 0; i < info->sector_count; i++) {
 330                         info->start[i] = base + (i * 0x00010000);
 331                 }
 332         } else if (info->flash_id & FLASH_BTYPE) {
 333                 /* set sector offsets for bottom boot block type    */
 334                 info->start[0] = base + 0x00000000;
 335                 info->start[1] = base + 0x00004000;
 336                 info->start[2] = base + 0x00006000;
 337                 info->start[3] = base + 0x00008000;
 338                 for (i = 4; i < info->sector_count; i++) {
 339                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 340                 }
 341         } else {
 342                 /* set sector offsets for top boot block type       */
 343                 i = info->sector_count - 1;
 344                 info->start[i--] = base + info->size - 0x00004000;
 345                 info->start[i--] = base + info->size - 0x00006000;
 346                 info->start[i--] = base + info->size - 0x00008000;
 347                 for (; i >= 0; i--) {
 348                         info->start[i] = base + i * 0x00010000;
 349                 }
 350         }
 351
 352         /* check for protected sectors */
 353         for (i = 0; i < info->sector_count; i++) {
 354                 /* read sector protection: D0 = 1 if protected */
 355                 caddr = (volatile unsigned char *)(info->start[i]);
 356                 info->protect[i] = caddr[2] & 1;
 357         }
 358
 359         /*
 360          * Prevent writes to uninitialized FLASH.
 361          */
 362         if (info->flash_id != FLASH_UNKNOWN) {
 363                 caddr = (vu_char *) info->start[0];
 364
 365                 caddr[0x0555] = 0xAA;
 366                 caddr[0x02AA] = 0x55;
 367                 caddr[0x0555] = 0xF0;
 368
 369                 udelay(20000);
 370         }
 371
 372         return (info->size);
 373 }
 374
 375
 376 /*-----------------------------------------------------------------------
 377  */
 378
 379 int flash_erase(flash_info_t * info, int s_first, int s_last)
 380 {
 381         vu_char *addr = (vu_char *) (info->start[0]);
 382         int flag, prot, sect, l_sect;
 383         ulong start, now, last;
 384
 385         if ((s_first < 0) || (s_first > s_last)) {
 386                 if (info->flash_id == FLASH_UNKNOWN) {
 387                         printf("- missing\n");
 388                 } else {
 389                         printf("- no sectors to erase\n");
 390                 }
 391                 return 1;
 392         }
 393
 394         if ((info->flash_id == FLASH_UNKNOWN) ||
 395             (info->flash_id > FLASH_AMD_COMP)) {
 396                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 397                 return 1;
 398         }
 399
 400         prot = 0;
 401         for (sect = s_first; sect <= s_last; ++sect) {
 402                 if (info->protect[sect]) {
 403                         prot++;
 404                 }
 405         }
 406
 407         if (prot) {
 408                 printf("- Warning: %d protected sectors will not be erased!\n", prot);
 409         } else {
 410                 printf("\n");
 411         }
 412
 413         l_sect = -1;
 414
 415         /* Disable interrupts which might cause a timeout here */
 416         flag = disable_interrupts();
 417
 418         addr[0x0555] = 0xAA;
 419         addr[0x02AA] = 0x55;
 420         addr[0x0555] = 0x80;
 421         addr[0x0555] = 0xAA;
 422         addr[0x02AA] = 0x55;
 423
 424         /* Start erase on unprotected sectors */
 425         for (sect = s_first; sect <= s_last; sect++) {
 426                 if (info->protect[sect] == 0) { /* not protected */
 427                         addr = (vu_char *) (info->start[sect]);
 428                         addr[0] = 0x30;
 429                         l_sect = sect;
 430                 }
 431         }
 432
 433         /* re-enable interrupts if necessary */
 434         if (flag)
 435                 enable_interrupts();
 436
 437         /* wait at least 80us - let's wait 1 ms */
 438         udelay(1000);
 439
 440         /*
 441          * We wait for the last triggered sector
 442          */
 443         if (l_sect < 0)
 444                 goto DONE;
 445
 446         start = get_timer(0);
 447         last = start;
 448         addr = (vu_char *) (info->start[l_sect]);
 449         while ((addr[0] & 0x80) != 0x80) {
 450                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 451                         printf("Timeout\n");
 452                         return 1;
 453                 }
 454                 /* show that we're waiting */
 455                 if ((now - last) > 1000) {      /* every second */
 456                         putc('.');
 457                         last = now;
 458                 }
 459         }
 460
 461 DONE:
 462         /* reset to read mode */
 463         addr = (vu_char *) info->start[0];
 464         addr[0] = 0xF0;                         /* reset bank */
 465
 466         printf(" done\n");
 467         return 0;
 468 }
 469
 470 /*-----------------------------------------------------------------------
 471  * Copy memory to flash, returns:
 472  * 0 - OK
 473  * 1 - write timeout
 474  * 2 - Flash not erased
 475  */
 476
 477 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 478 {
 479         int rc;
 480
 481         while (cnt > 0) {
 482                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
 483                         return (rc);
 484                 }
 485                 --cnt;
 486         }
 487
 488         return (0);
 489 }
 490
 491 /*-----------------------------------------------------------------------
 492  * Write a word to Flash, returns:
 493  * 0 - OK
 494  * 1 - write timeout
 495  * 2 - Flash not erased
 496  */
 497 static int write_byte(flash_info_t * info, ulong dest, uchar data)
 498 {
 499         vu_char *addr = (vu_char *) (info->start[0]);
 500         ulong start;
 501         int flag;
 502
 503         /* Check if Flash is (sufficiently) erased */
 504         if ((*((vu_char *) dest) & data) != data) {
 505                 return (2);
 506         }
 507         /* Disable interrupts which might cause a timeout here */
 508         flag = disable_interrupts();
 509
 510         addr[0x0555] = 0xAA;
 511         addr[0x02AA] = 0x55;
 512         addr[0x0555] = 0xA0;
 513
 514         *((vu_char *) dest) = data;
 515
 516         /* re-enable interrupts if necessary */
 517         if (flag)
 518                 enable_interrupts();
 519
 520         /* data polling for D7 */
 521         start = get_timer(0);
 522         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 523                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 524                         return (1);
 525                 }
 526         }
 527         return (0);
 528 }