board/hidden_dragon/flash.c

   1 /*
   2  * (C) Copyright 2004
   3  * Yusdi Santoso, Adaptec Inc., [email protected]
   4  *
   5  * (C) Copyright 2000-2005
   6  * Wolfgang Denk, DENX Software Engineering, [email protected].
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <mpc824x.h>
  29 #include <asm/processor.h>
  30 #include <asm/pci_io.h>
  31 #include <w83c553f.h>
  32
  33 #define ROM_CS0_START   0xFF800000
  34 #define ROM_CS1_START   0xFF000000
  35
  36 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips    */
  37
  38 #if defined(CFG_ENV_IS_IN_FLASH)
  39 # ifndef  CFG_ENV_ADDR
  40 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  41 # endif
  42 # ifndef  CFG_ENV_SIZE
  43 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  44 # endif
  45 # ifndef  CFG_ENV_SECT_SIZE
  46 #  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
  47 # endif
  48 #endif
  49
  50 /*-----------------------------------------------------------------------
  51  * Functions
  52  */
  53 static int write_word (flash_info_t *info, ulong dest, ulong data);
  54
  55 /*flash command address offsets*/
  56
  57 #define ADDR0           (0xAAA)
  58 #define ADDR1           (0x555)
  59 #define ADDR3           (0x001)
  60
  61 #define FLASH_WORD_SIZE unsigned char
  62
  63 /*-----------------------------------------------------------------------
  64  */
  65
  66 static unsigned long flash_id (unsigned char mfct, unsigned char chip)
  67         __attribute__ ((const));
  68
  69 typedef struct {
  70         FLASH_WORD_SIZE extval;
  71         unsigned short intval;
  72 } map_entry;
  73
  74 static unsigned long flash_id (unsigned char mfct, unsigned char chip)
  75 {
  76         static const map_entry mfct_map[] = {
  77                 {(FLASH_WORD_SIZE) AMD_MANUFACT,
  78                  (unsigned short) ((unsigned long) FLASH_MAN_AMD >> 16)},
  79                 {(FLASH_WORD_SIZE) FUJ_MANUFACT,
  80                  (unsigned short) ((unsigned long) FLASH_MAN_FUJ >> 16)},
  81                 {(FLASH_WORD_SIZE) STM_MANUFACT,
  82                  (unsigned short) ((unsigned long) FLASH_MAN_STM >> 16)},
  83                 {(FLASH_WORD_SIZE) MT_MANUFACT,
  84                  (unsigned short) ((unsigned long) FLASH_MAN_MT >> 16)},
  85                 {(FLASH_WORD_SIZE) INTEL_MANUFACT,
  86                  (unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)},
  87                 {(FLASH_WORD_SIZE) INTEL_ALT_MANU,
  88                  (unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)}
  89         };
  90
  91         static const map_entry chip_map[] = {
  92                 {AMD_ID_F040B, FLASH_AM040},
  93                 {(FLASH_WORD_SIZE) STM_ID_x800AB, FLASH_STM800AB}
  94         };
  95
  96         const map_entry *p;
  97         unsigned long result = FLASH_UNKNOWN;
  98
  99         /* find chip id */
 100         for (p = &chip_map[0];
 101              p < &chip_map[sizeof chip_map / sizeof chip_map[0]]; p++)
 102                 if (p->extval == chip) {
 103                         result = FLASH_VENDMASK | p->intval;
 104                         break;
 105                 }
 106
 107         /* find vendor id */
 108         for (p = &mfct_map[0];
 109              p < &mfct_map[sizeof mfct_map / sizeof mfct_map[0]]; p++)
 110                 if (p->extval == mfct) {
 111                         result &= ~FLASH_VENDMASK;
 112                         result |= (unsigned long) p->intval << 16;
 113                         break;
 114                 }
 115
 116         return result;
 117 }
 118
 119 unsigned long flash_init (void)
 120 {
 121         unsigned long i;
 122         unsigned char j;
 123         static const ulong flash_banks[] = CFG_FLASH_BANKS;
 124
 125         /* Init: no FLASHes known */
 126         for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
 127                 flash_info_t *const pflinfo = &flash_info[i];
 128
 129                 pflinfo->flash_id = FLASH_UNKNOWN;
 130                 pflinfo->size = 0;
 131                 pflinfo->sector_count = 0;
 132         }
 133
 134         /* Enable writes to Hidden Dragon flash */
 135         {
 136                 register unsigned char temp;
 137
 138                 CONFIG_READ_BYTE (CFG_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR,
 139                                   temp);
 140                 temp &= ~0x20;  /* clear BIOSWP bit */
 141                 CONFIG_WRITE_BYTE (CFG_WINBOND_ISA_CFG_ADDR + WINBOND_CSCR,
 142                                    temp);
 143         }
 144
 145         for (i = 0; i < sizeof flash_banks / sizeof flash_banks[0]; i++) {
 146                 flash_info_t *const pflinfo = &flash_info[i];
 147                 const unsigned long base_address = flash_banks[i];
 148                 volatile FLASH_WORD_SIZE *const flash =
 149                         (FLASH_WORD_SIZE *) base_address;
 150
 151                 flash[0xAAA << (3 * i)] = 0xaa;
 152                 flash[0x555 << (3 * i)] = 0x55;
 153                 flash[0xAAA << (3 * i)] = 0x90;
 154                 __asm__ __volatile__ ("sync");
 155
 156                 pflinfo->flash_id =
 157                         flash_id (flash[0x0], flash[0x2 + 14 * i]);
 158
 159                 switch (pflinfo->flash_id & FLASH_TYPEMASK) {
 160                 case FLASH_AM040:
 161                         pflinfo->size = 0x00080000;
 162                         pflinfo->sector_count = 8;
 163                         for (j = 0; j < 8; j++) {
 164                                 pflinfo->start[j] =
 165                                         base_address + 0x00010000 * j;
 166                                 pflinfo->protect[j] = flash[(j << 16) | 0x2];
 167                         }
 168                         break;
 169                 case FLASH_STM800AB:
 170                         pflinfo->size = 0x00100000;
 171                         pflinfo->sector_count = 19;
 172                         pflinfo->start[0] = base_address;
 173                         pflinfo->start[1] = base_address + 0x4000;
 174                         pflinfo->start[2] = base_address + 0x6000;
 175                         pflinfo->start[3] = base_address + 0x8000;
 176                         for (j = 1; j < 16; j++) {
 177                                 pflinfo->start[j + 3] =
 178                                         base_address + 0x00010000 * j;
 179                         }
 180                         break;
 181                 default:
 182                         /* The chip used is not listed in flash_id
 183                            TODO: Change this to explicitly detect the flash type
 184                          */
 185                         {
 186                                 int sector_addr = base_address;
 187
 188                                 pflinfo->size = 0x00200000;
 189                                 pflinfo->sector_count = 35;
 190                                 pflinfo->start[0] = sector_addr;
 191                                 sector_addr += 0x4000;  /* 16K */
 192                                 pflinfo->start[1] = sector_addr;
 193                                 sector_addr += 0x2000;  /* 8K */
 194                                 pflinfo->start[2] = sector_addr;
 195                                 sector_addr += 0x2000;  /* 8K */
 196                                 pflinfo->start[3] = sector_addr;
 197                                 sector_addr += 0x8000;  /* 32K */
 198
 199                                 for (j = 4; j < 35; j++) {
 200                                         pflinfo->start[j] = sector_addr;
 201                                         sector_addr += 0x10000; /* 64K */
 202                                 }
 203                         }
 204                         break;
 205                 }
 206                 /* Protect monitor and environment sectors
 207                  */
 208 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 209                 flash_protect (FLAG_PROTECT_SET,
 210                                CFG_MONITOR_BASE,
 211                                CFG_MONITOR_BASE + monitor_flash_len - 1,
 212                                &flash_info[0]);
 213 #endif
 214
 215 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
 216                 flash_protect (FLAG_PROTECT_SET,
 217                                CFG_ENV_ADDR,
 218                                CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
 219                                &flash_info[0]);
 220 #endif
 221
 222                 /* reset device to read mode */
 223                 flash[0x0000] = 0xf0;
 224                 __asm__ __volatile__ ("sync");
 225         }
 226
 227         /* only have 1 bank */
 228         return flash_info[0].size;
 229 }
 230
 231 /*-----------------------------------------------------------------------
 232  */
 233 void flash_print_info (flash_info_t * info)
 234 {
 235         static const char unk[] = "Unknown";
 236         const char *mfct = unk, *type = unk;
 237         unsigned int i;
 238
 239         if (info->flash_id != FLASH_UNKNOWN) {
 240                 switch (info->flash_id & FLASH_VENDMASK) {
 241                 case FLASH_MAN_AMD:
 242                         mfct = "AMD";
 243                         break;
 244                 case FLASH_MAN_FUJ:
 245                         mfct = "FUJITSU";
 246                         break;
 247                 case FLASH_MAN_STM:
 248                         mfct = "STM";
 249                         break;
 250                 case FLASH_MAN_SST:
 251                         mfct = "SST";
 252                         break;
 253                 case FLASH_MAN_BM:
 254                         mfct = "Bright Microelectonics";
 255                         break;
 256                 case FLASH_MAN_INTEL:
 257                         mfct = "Intel";
 258                         break;
 259                 }
 260
 261                 switch (info->flash_id & FLASH_TYPEMASK) {
 262                 case FLASH_AM040:
 263                         type = "AM29F040B (512K * 8, uniform sector size)";
 264                         break;
 265                 case FLASH_AM400B:
 266                         type = "AM29LV400B (4 Mbit, bottom boot sect)";
 267                         break;
 268                 case FLASH_AM400T:
 269                         type = "AM29LV400T (4 Mbit, top boot sector)";
 270                         break;
 271                 case FLASH_AM800B:
 272                         type = "AM29LV800B (8 Mbit, bottom boot sect)";
 273                         break;
 274                 case FLASH_AM800T:
 275                         type = "AM29LV800T (8 Mbit, top boot sector)";
 276                         break;
 277                 case FLASH_AM160T:
 278                         type = "AM29LV160T (16 Mbit, top boot sector)";
 279                         break;
 280                 case FLASH_AM320B:
 281                         type = "AM29LV320B (32 Mbit, bottom boot sect)";
 282                         break;
 283                 case FLASH_AM320T:
 284                         type = "AM29LV320T (32 Mbit, top boot sector)";
 285                         break;
 286                 case FLASH_STM800AB:
 287                         type = "M29W800AB (8 Mbit, bottom boot sect)";
 288                         break;
 289                 case FLASH_SST800A:
 290                         type = "SST39LF/VF800 (8 Mbit, uniform sector size)";
 291                         break;
 292                 case FLASH_SST160A:
 293                         type = "SST39LF/VF160 (16 Mbit, uniform sector size)";
 294                         break;
 295                 }
 296         }
 297
 298         printf ("\n  Brand: %s Type: %s\n"
 299                 "  Size: %lu KB in %d Sectors\n",
 300                 mfct, type, info->size >> 10, info->sector_count);
 301
 302         printf ("  Sector Start Addresses:");
 303
 304         for (i = 0; i < info->sector_count; i++) {
 305                 unsigned long size;
 306                 unsigned int erased;
 307                 unsigned long *flash = (unsigned long *) info->start[i];
 308
 309                 /*
 310                  * Check if whole sector is erased
 311                  */
 312                 size = (i != (info->sector_count - 1)) ?
 313                         (info->start[i + 1] - info->start[i]) >> 2 :
 314                         (info->start[0] + info->size - info->start[i]) >> 2;
 315
 316                 for (flash = (unsigned long *) info->start[i], erased = 1;
 317                      (flash != (unsigned long *) info->start[i] + size)
 318                      && erased; flash++)
 319                         erased = *flash == ~0x0UL;
 320
 321                 printf ("%s %08lX %s %s",
 322                         (i % 5) ? "" : "\n   ",
 323                         info->start[i],
 324                         erased ? "E" : " ", info->protect[i] ? "RO" : "  ");
 325         }
 326
 327         puts ("\n");
 328         return;
 329 }
 330
 331 int flash_erase (flash_info_t * info, int s_first, int s_last)
 332 {
 333         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
 334         int flag, prot, sect, l_sect;
 335         ulong start, now, last;
 336         unsigned char sh8b;
 337
 338         if ((s_first < 0) || (s_first > s_last)) {
 339                 if (info->flash_id == FLASH_UNKNOWN) {
 340                         printf ("- missing\n");
 341                 } else {
 342                         printf ("- no sectors to erase\n");
 343                 }
 344                 return 1;
 345         }
 346
 347         if ((info->flash_id == FLASH_UNKNOWN) ||
 348             (info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) {
 349                 printf ("Can't erase unknown flash type - aborted\n");
 350                 return 1;
 351         }
 352
 353         prot = 0;
 354         for (sect = s_first; sect <= s_last; ++sect) {
 355                 if (info->protect[sect]) {
 356                         prot++;
 357                 }
 358         }
 359
 360         if (prot) {
 361                 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 362         } else {
 363                 printf ("\n");
 364         }
 365
 366         l_sect = -1;
 367
 368         /* Check the ROM CS */
 369         if ((info->start[0] >= ROM_CS1_START)
 370             && (info->start[0] < ROM_CS0_START))
 371                 sh8b = 3;
 372         else
 373                 sh8b = 0;
 374
 375         /* Disable interrupts which might cause a timeout here */
 376         flag = disable_interrupts ();
 377
 378         addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 379         addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 380         addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080;
 381         addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 382         addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 383
 384         /* Start erase on unprotected sectors */
 385         for (sect = s_first; sect <= s_last; sect++) {
 386                 if (info->protect[sect] == 0) { /* not protected */
 387                         addr = (FLASH_WORD_SIZE *) (info->start[0] +
 388                                                     ((info->start[sect] -
 389                                                       info->start[0]) << sh8b));
 390                         if (info->flash_id & FLASH_MAN_SST) {
 391                                 addr[ADDR0 << sh8b] =
 392                                         (FLASH_WORD_SIZE) 0x00AA00AA;
 393                                 addr[ADDR1 << sh8b] =
 394                                         (FLASH_WORD_SIZE) 0x00550055;
 395                                 addr[ADDR0 << sh8b] =
 396                                         (FLASH_WORD_SIZE) 0x00800080;
 397                                 addr[ADDR0 << sh8b] =
 398                                         (FLASH_WORD_SIZE) 0x00AA00AA;
 399                                 addr[ADDR1 << sh8b] =
 400                                         (FLASH_WORD_SIZE) 0x00550055;
 401                                 addr[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
 402                                 udelay (30000); /* wait 30 ms */
 403                         } else
 404                                 addr[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
 405                         l_sect = sect;
 406                 }
 407         }
 408
 409         /* re-enable interrupts if necessary */
 410         if (flag)
 411                 enable_interrupts ();
 412
 413         /* wait at least 80us - let's wait 1 ms */
 414         udelay (1000);
 415
 416         /*
 417          * We wait for the last triggered sector
 418          */
 419         if (l_sect < 0)
 420                 goto DONE;
 421
 422         start = get_timer (0);
 423         last = start;
 424         addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->start[l_sect] -
 425                                                        info->
 426                                                        start[0]) << sh8b));
 427         while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
 428                (FLASH_WORD_SIZE) 0x00800080) {
 429                 if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
 430                         printf ("Timeout\n");
 431                         return 1;
 432                 }
 433                 /* show that we're waiting */
 434                 if ((now - last) > 1000) {      /* every second */
 435                         serial_putc ('.');
 436                         last = now;
 437                 }
 438         }
 439
 440       DONE:
 441         /* reset to read mode */
 442         addr = (FLASH_WORD_SIZE *) info->start[0];
 443         addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
 444
 445         printf (" done\n");
 446         return 0;
 447 }
 448
 449 /*-----------------------------------------------------------------------
 450  * Copy memory to flash, returns:
 451  * 0 - OK
 452  * 1 - write timeout
 453  * 2 - Flash not erased
 454  */
 455
 456 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 457 {
 458         ulong cp, wp, data;
 459         int i, l, rc;
 460
 461         wp = (addr & ~3);       /* get lower word aligned address */
 462
 463         /*
 464          * handle unaligned start bytes
 465          */
 466         if ((l = addr - wp) != 0) {
 467                 data = 0;
 468                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 469                         data = (data << 8) | (*(uchar *) cp);
 470                 }
 471                 for (; i < 4 && cnt > 0; ++i) {
 472                         data = (data << 8) | *src++;
 473                         --cnt;
 474                         ++cp;
 475                 }
 476                 for (; cnt == 0 && i < 4; ++i, ++cp) {
 477                         data = (data << 8) | (*(uchar *) cp);
 478                 }
 479
 480                 if ((rc = write_word (info, wp, data)) != 0) {
 481                         return (rc);
 482                 }
 483                 wp += 4;
 484         }
 485
 486         /*
 487          * handle word aligned part
 488          */
 489         while (cnt >= 4) {
 490                 data = 0;
 491                 for (i = 0; i < 4; ++i) {
 492                         data = (data << 8) | *src++;
 493                 }
 494                 if ((rc = write_word (info, wp, data)) != 0) {
 495                         return (rc);
 496                 }
 497                 wp += 4;
 498                 cnt -= 4;
 499         }
 500
 501         if (cnt == 0) {
 502                 return (0);
 503         }
 504
 505         /*
 506          * handle unaligned tail bytes
 507          */
 508         data = 0;
 509         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 510                 data = (data << 8) | *src++;
 511                 --cnt;
 512         }
 513         for (; i < 4; ++i, ++cp) {
 514                 data = (data << 8) | (*(uchar *) cp);
 515         }
 516
 517         return (write_word (info, wp, data));
 518 }
 519
 520 /*-----------------------------------------------------------------------
 521  * Write a word to Flash, returns:
 522  * 0 - OK
 523  * 1 - write timeout
 524  * 2 - Flash not erased
 525  */
 526 static int write_word (flash_info_t * info, ulong dest, ulong data)
 527 {
 528         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) info->start[0];
 529         volatile FLASH_WORD_SIZE *dest2;
 530         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
 531         ulong start;
 532         int flag;
 533         int i;
 534         unsigned char sh8b;
 535
 536         /* Check the ROM CS */
 537         if ((info->start[0] >= ROM_CS1_START)
 538             && (info->start[0] < ROM_CS0_START))
 539                 sh8b = 3;
 540         else
 541                 sh8b = 0;
 542
 543         dest2 = (FLASH_WORD_SIZE *) (((dest - info->start[0]) << sh8b) +
 544                                      info->start[0]);
 545
 546         /* Check if Flash is (sufficiently) erased */
 547         if ((*dest2 & (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
 548                 return (2);
 549         }
 550         /* Disable interrupts which might cause a timeout here */
 551         flag = disable_interrupts ();
 552
 553         for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
 554                 addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA;
 555                 addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055;
 556                 addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00A000A0;
 557
 558                 dest2[i << sh8b] = data2[i];
 559
 560                 /* re-enable interrupts if necessary */
 561                 if (flag)
 562                         enable_interrupts ();
 563
 564                 /* data polling for D7 */
 565                 start = get_timer (0);
 566                 while ((dest2[i << sh8b] & (FLASH_WORD_SIZE) 0x00800080) !=
 567                        (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
 568                         if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 569                                 return (1);
 570                         }
 571                 }
 572         }
 573
 574         return (0);
 575 }