board/amcc/common/flash.c

   1 /*
   2  * (C) Copyright 2004-2005
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
   6  * Add support for Am29F016D and dynamic switch setting.
   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 /*
  28  * Modified 4/5/2001
  29  * Wait for completion of each sector erase command issued
  30  * 4/5/2001
  31  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  32  */
  33
  34 #include <common.h>
  35 #include <ppc4xx.h>
  36 #include <asm/processor.h>
  37
  38 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips        */
  39
  40 /*-----------------------------------------------------------------------
  41  * Functions
  42  */
  43 static int write_word(flash_info_t * info, ulong dest, ulong data);
  44
  45 void flash_print_info(flash_info_t * info)
  46 {
  47         int i;
  48         int k;
  49         int size;
  50         int erased;
  51         volatile unsigned long *flash;
  52
  53         if (info->flash_id == FLASH_UNKNOWN) {
  54                 printf("missing or unknown FLASH type\n");
  55                 return;
  56         }
  57
  58         switch (info->flash_id & FLASH_VENDMASK) {
  59         case FLASH_MAN_AMD:
  60                 printf("AMD ");
  61                 break;
  62         case FLASH_MAN_STM:
  63                 printf("STM ");
  64                 break;
  65         case FLASH_MAN_FUJ:
  66                 printf("FUJITSU ");
  67                 break;
  68         case FLASH_MAN_SST:
  69                 printf("SST ");
  70                 break;
  71         default:
  72                 printf("Unknown Vendor ");
  73                 break;
  74         }
  75
  76         switch (info->flash_id & FLASH_TYPEMASK) {
  77         case FLASH_AM040:
  78                 printf("AM29F040 (512 Kbit, uniform sector size)\n");
  79                 break;
  80         case FLASH_AM400B:
  81                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
  82                 break;
  83         case FLASH_AM400T:
  84                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
  85                 break;
  86         case FLASH_AM800B:
  87                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
  88                 break;
  89         case FLASH_AM800T:
  90                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
  91                 break;
  92         case FLASH_AMD016:
  93                 printf("AM29F016D (16 Mbit, uniform sector size)\n");
  94                 break;
  95         case FLASH_AM160B:
  96                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
  97                 break;
  98         case FLASH_AM160T:
  99                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 100                 break;
 101         case FLASH_AM320B:
 102                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 103                 break;
 104         case FLASH_AM320T:
 105                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 106                 break;
 107         case FLASH_AM033C:
 108                 printf("AM29LV033C (32 Mbit, top boot sector)\n");
 109                 break;
 110         case FLASH_SST800A:
 111                 printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 112                 break;
 113         case FLASH_SST160A:
 114                 printf("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 115                 break;
 116         default:
 117                 printf("Unknown Chip Type\n");
 118                 break;
 119         }
 120
 121         printf("  Size: %ld KB in %d Sectors\n",
 122                info->size >> 10, info->sector_count);
 123
 124         printf("  Sector Start Addresses:");
 125         for (i = 0; i < info->sector_count; ++i) {
 126                 /*
 127                  * Check if whole sector is erased
 128                  */
 129                 if (i != (info->sector_count - 1))
 130                         size = info->start[i + 1] - info->start[i];
 131                 else
 132                         size = info->start[0] + info->size - info->start[i];
 133                 erased = 1;
 134                 flash = (volatile unsigned long *)info->start[i];
 135                 size = size >> 2;       /* divide by 4 for longword access */
 136                 for (k = 0; k < size; k++) {
 137                         if (*flash++ != 0xffffffff) {
 138                                 erased = 0;
 139                                 break;
 140                         }
 141                 }
 142
 143                 if ((i % 5) == 0)
 144                         printf("\n   ");
 145                 printf(" %08lX%s%s",
 146                        info->start[i],
 147                        erased ? " E" : "  ", info->protect[i] ? "RO " : "   ");
 148         }
 149         printf("\n");
 150         return;
 151 }
 152
 153
 154 /*
 155  * The following code cannot be run from FLASH!
 156  */
 157 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 158 {
 159         short i;
 160         CFG_FLASH_WORD_SIZE value;
 161         ulong base = (ulong) addr;
 162         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
 163
 164         DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
 165
 166         /* Write auto select command: read Manufacturer ID */
 167         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 168         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 169         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
 170         udelay(1000);
 171
 172         value = addr2[0];
 173         DEBUGF("FLASH MANUFACT: %x\n", value);
 174
 175         switch (value) {
 176         case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 177                 info->flash_id = FLASH_MAN_AMD;
 178                 break;
 179         case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
 180                 info->flash_id = FLASH_MAN_FUJ;
 181                 break;
 182         case (CFG_FLASH_WORD_SIZE) SST_MANUFACT:
 183                 info->flash_id = FLASH_MAN_SST;
 184                 break;
 185         case (CFG_FLASH_WORD_SIZE) STM_MANUFACT:
 186                 info->flash_id = FLASH_MAN_STM;
 187                 break;
 188         default:
 189                 info->flash_id = FLASH_UNKNOWN;
 190                 info->sector_count = 0;
 191                 info->size = 0;
 192                 return (0);     /* no or unknown flash  */
 193         }
 194
 195         value = addr2[1];       /* device ID            */
 196
 197         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 198
 199         switch (value) {
 200         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV040B:
 201                 info->flash_id += FLASH_AM040;
 202                 info->sector_count = 8;
 203                 info->size = 0x0080000; /* => 512 ko */
 204                 break;
 205
 206         case (CFG_FLASH_WORD_SIZE) AMD_ID_F040B:
 207                 info->flash_id += FLASH_AM040;
 208                 info->sector_count = 8;
 209                 info->size = 0x0080000; /* => 512 ko */
 210                 break;
 211
 212         case (CFG_FLASH_WORD_SIZE) STM_ID_M29W040B:
 213                 info->flash_id += FLASH_AM040;
 214                 info->sector_count = 8;
 215                 info->size = 0x0080000; /* => 512 ko */
 216                 break;
 217
 218         case (CFG_FLASH_WORD_SIZE) AMD_ID_F016D:
 219                 info->flash_id += FLASH_AMD016;
 220                 info->sector_count = 32;
 221                 info->size = 0x00200000;
 222                 break;          /* => 2 MB              */
 223
 224         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV033C:
 225                 info->flash_id += FLASH_AMDLV033C;
 226                 info->sector_count = 64;
 227                 info->size = 0x00400000;
 228                 break;          /* => 4 MB              */
 229
 230         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400T:
 231                 info->flash_id += FLASH_AM400T;
 232                 info->sector_count = 11;
 233                 info->size = 0x00080000;
 234                 break;          /* => 0.5 MB            */
 235
 236         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400B:
 237                 info->flash_id += FLASH_AM400B;
 238                 info->sector_count = 11;
 239                 info->size = 0x00080000;
 240                 break;          /* => 0.5 MB            */
 241
 242         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800T:
 243                 info->flash_id += FLASH_AM800T;
 244                 info->sector_count = 19;
 245                 info->size = 0x00100000;
 246                 break;          /* => 1 MB              */
 247
 248         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800B:
 249                 info->flash_id += FLASH_AM800B;
 250                 info->sector_count = 19;
 251                 info->size = 0x00100000;
 252                 break;          /* => 1 MB              */
 253
 254         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160T:
 255                 info->flash_id += FLASH_AM160T;
 256                 info->sector_count = 35;
 257                 info->size = 0x00200000;
 258                 break;          /* => 2 MB              */
 259
 260         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160B:
 261                 info->flash_id += FLASH_AM160B;
 262                 info->sector_count = 35;
 263                 info->size = 0x00200000;
 264                 break;          /* => 2 MB              */
 265
 266         default:
 267                 info->flash_id = FLASH_UNKNOWN;
 268                 return (0);     /* => no or unknown flash */
 269         }
 270
 271         /* set up sector start address table */
 272         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 273             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
 274             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
 275                 for (i = 0; i < info->sector_count; i++)
 276                         info->start[i] = base + (i * 0x00010000);
 277         } else {
 278                 if (info->flash_id & FLASH_BTYPE) {
 279                         /* set sector offsets for bottom boot block type        */
 280                         info->start[0] = base + 0x00000000;
 281                         info->start[1] = base + 0x00004000;
 282                         info->start[2] = base + 0x00006000;
 283                         info->start[3] = base + 0x00008000;
 284                         for (i = 4; i < info->sector_count; i++) {
 285                                 info->start[i] =
 286                                     base + (i * 0x00010000) - 0x00030000;
 287                         }
 288                 } else {
 289                         /* set sector offsets for top boot block type           */
 290                         i = info->sector_count - 1;
 291                         info->start[i--] = base + info->size - 0x00004000;
 292                         info->start[i--] = base + info->size - 0x00006000;
 293                         info->start[i--] = base + info->size - 0x00008000;
 294                         for (; i >= 0; i--) {
 295                                 info->start[i] = base + i * 0x00010000;
 296                         }
 297                 }
 298         }
 299
 300         /* check for protected sectors */
 301         for (i = 0; i < info->sector_count; i++) {
 302                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 303                 /* D0 = 1 if protected */
 304                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 305
 306                 /* For AMD29033C flash we need to resend the command of *
 307                  * reading flash protection for upper 8 Mb of flash     */
 308                 if (i == 32) {
 309                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA;
 310                         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555;
 311                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090;
 312                 }
 313
 314                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 315                         info->protect[i] = 0;
 316                 else
 317                         info->protect[i] = addr2[2] & 1;
 318         }
 319
 320         /* issue bank reset to return to read mode */
 321         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
 322
 323         return (info->size);
 324 }
 325
 326 int wait_for_DQ7(flash_info_t * info, int sect)
 327 {
 328         ulong start, now, last;
 329         volatile CFG_FLASH_WORD_SIZE *addr =
 330             (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 331
 332         start = get_timer(0);
 333         last = start;
 334         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 335                (CFG_FLASH_WORD_SIZE) 0x00800080) {
 336                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 337                         printf("Timeout\n");
 338                         return -1;
 339                 }
 340                 /* show that we're waiting */
 341                 if ((now - last) > 1000) {      /* every second */
 342                         putc('.');
 343                         last = now;
 344                 }
 345         }
 346         return 0;
 347 }
 348
 349 int flash_erase(flash_info_t * info, int s_first, int s_last)
 350 {
 351         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 352         volatile CFG_FLASH_WORD_SIZE *addr2;
 353         int flag, prot, sect, l_sect;
 354         int i;
 355
 356         if ((s_first < 0) || (s_first > s_last)) {
 357                 if (info->flash_id == FLASH_UNKNOWN) {
 358                         printf("- missing\n");
 359                 } else {
 360                         printf("- no sectors to erase\n");
 361                 }
 362                 return 1;
 363         }
 364
 365         if (info->flash_id == FLASH_UNKNOWN) {
 366                 printf("Can't erase unknown flash type - aborted\n");
 367                 return 1;
 368         }
 369
 370         prot = 0;
 371         for (sect = s_first; sect <= s_last; ++sect) {
 372                 if (info->protect[sect]) {
 373                         prot++;
 374                 }
 375         }
 376
 377         if (prot) {
 378                 printf("- Warning: %d protected sectors will not be erased!\n",
 379                        prot);
 380         } else {
 381                 printf("\n");
 382         }
 383
 384         l_sect = -1;
 385
 386         /* Disable interrupts which might cause a timeout here */
 387         flag = disable_interrupts();
 388
 389         /* Start erase on unprotected sectors */
 390         for (sect = s_first; sect <= s_last; sect++) {
 391                 if (info->protect[sect] == 0) { /* not protected */
 392                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 393
 394                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 395                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 396                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 397                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 398                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 399                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 400                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050;    /* block erase */
 401                                 for (i = 0; i < 50; i++)
 402                                         udelay(1000);   /* wait 1 ms */
 403                         } else {
 404                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 405                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 406                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 407                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 408                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 409                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
 410                         }
 411                         l_sect = sect;
 412                         /*
 413                          * Wait for each sector to complete, it's more
 414                          * reliable.  According to AMD Spec, you must
 415                          * issue all erase commands within a specified
 416                          * timeout.  This has been seen to fail, especially
 417                          * if printf()s are included (for debug)!!
 418                          */
 419                         wait_for_DQ7(info, sect);
 420                 }
 421         }
 422
 423         /* re-enable interrupts if necessary */
 424         if (flag)
 425                 enable_interrupts();
 426
 427         /* wait at least 80us - let's wait 1 ms */
 428         udelay(1000);
 429
 430         /* reset to read mode */
 431         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 432         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
 433
 434         printf(" done\n");
 435         return 0;
 436 }
 437
 438 /*-----------------------------------------------------------------------
 439  * Copy memory to flash, returns:
 440  * 0 - OK
 441  * 1 - write timeout
 442  * 2 - Flash not erased
 443  */
 444 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 445 {
 446         ulong cp, wp, data;
 447         int i, l, rc;
 448
 449         wp = (addr & ~3);       /* get lower word aligned address */
 450
 451         /*
 452          * handle unaligned start bytes
 453          */
 454         if ((l = addr - wp) != 0) {
 455                 data = 0;
 456                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 457                         data = (data << 8) | (*(uchar *) cp);
 458                 }
 459                 for (; i < 4 && cnt > 0; ++i) {
 460                         data = (data << 8) | *src++;
 461                         --cnt;
 462                         ++cp;
 463                 }
 464                 for (; cnt == 0 && i < 4; ++i, ++cp) {
 465                         data = (data << 8) | (*(uchar *) cp);
 466                 }
 467
 468                 if ((rc = write_word(info, wp, data)) != 0) {
 469                         return (rc);
 470                 }
 471                 wp += 4;
 472         }
 473
 474         /*
 475          * handle word aligned part
 476          */
 477         while (cnt >= 4) {
 478                 data = 0;
 479                 for (i = 0; i < 4; ++i) {
 480                         data = (data << 8) | *src++;
 481                 }
 482                 if ((rc = write_word(info, wp, data)) != 0) {
 483                         return (rc);
 484                 }
 485                 wp += 4;
 486                 cnt -= 4;
 487         }
 488
 489         if (cnt == 0) {
 490                 return (0);
 491         }
 492
 493         /*
 494          * handle unaligned tail bytes
 495          */
 496         data = 0;
 497         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 498                 data = (data << 8) | *src++;
 499                 --cnt;
 500         }
 501         for (; i < 4; ++i, ++cp) {
 502                 data = (data << 8) | (*(uchar *) cp);
 503         }
 504
 505         return (write_word(info, wp, data));
 506 }
 507
 508 /*-----------------------------------------------------------------------
 509  * Write a word to Flash, returns:
 510  * 0 - OK
 511  * 1 - write timeout
 512  * 2 - Flash not erased
 513  */
 514 static int write_word(flash_info_t * info, ulong dest, ulong data)
 515 {
 516         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 517         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 518         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 519         ulong start;
 520         int i;
 521
 522         /* Check if Flash is (sufficiently) erased */
 523         if ((*((vu_long *)dest) & data) != data) {
 524                 return (2);
 525         }
 526
 527         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 528                 int flag;
 529
 530                 /* Disable interrupts which might cause a timeout here */
 531                 flag = disable_interrupts();
 532
 533                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 534                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 535                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
 536
 537                 dest2[i] = data2[i];
 538
 539                 /* re-enable interrupts if necessary */
 540                 if (flag)
 541                         enable_interrupts();
 542
 543                 /* data polling for D7 */
 544                 start = get_timer(0);
 545                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 546                        (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
 547
 548                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 549                                 return (1);
 550                         }
 551                 }
 552         }
 553
 554         return (0);
 555 }