board/ebony/flash.c

   1 /*
   2  * (C) Copyright 2002
   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
  39 #undef DEBUG
  40 #ifdef DEBUG
  41 #define DEBUGF(x...) printf(x)
  42 #else
  43 #define DEBUGF(x...)
  44 #endif /* DEBUG */
  45
  46 #define     BOOT_SMALL_FLASH        32              /* 00100000 */
  47 #define     FLASH_ONBD_N            2               /* 00000010 */
  48 #define     FLASH_SRAM_SEL          1               /* 00000001 */
  49
  50 #define     BOOT_SMALL_FLASH_VAL    4
  51 #define     FLASH_ONBD_N_VAL        2
  52 #define     FLASH_SRAM_SEL_VAL      1
  53
  54
  55 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  56
  57 static  unsigned    long    flash_addr_table[8][CFG_MAX_FLASH_BANKS] = {
  58         {0xffc00000, 0xffe00000, 0xff880000},   /* 0:000: configuraton 3 */
  59         {0xffc00000, 0xffe00000, 0xff800000},   /* 1:001: configuraton 4 */
  60         {0xffc00000, 0xffe00000, 0x00000000},   /* 2:010: configuraton 7 */
  61         {0xffc00000, 0xffe00000, 0x00000000},   /* 3:011: configuraton 8 */
  62         {0xff800000, 0xffa00000, 0xfff80000},   /* 4:100: configuraton 1 */
  63         {0xff800000, 0xffa00000, 0xfff00000},   /* 5:101: configuraton 2 */
  64         {0xffc00000, 0xffe00000, 0x00000000},   /* 6:110: configuraton 5 */
  65         {0xffc00000, 0xffe00000, 0x00000000}    /* 7:111: configuraton 6 */
  66 };
  67
  68 /*-----------------------------------------------------------------------
  69  * Functions
  70  */
  71 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  72 static int write_word (flash_info_t *info, ulong dest, ulong data);
  73 #if 0
  74 static void flash_get_offsets (ulong base, flash_info_t *info);
  75 #endif
  76
  77 #ifdef CONFIG_ADCIOP
  78 #define ADDR0           0x0aa9
  79 #define ADDR1           0x0556
  80 #define FLASH_WORD_SIZE unsigned char
  81 #endif
  82
  83 #ifdef CONFIG_CPCI405
  84 #define ADDR0           0x5555
  85 #define ADDR1           0x2aaa
  86 #define FLASH_WORD_SIZE unsigned short
  87 #endif
  88
  89 #ifdef CONFIG_WALNUT405
  90 #define ADDR0           0x5555
  91 #define ADDR1           0x2aaa
  92 #define FLASH_WORD_SIZE unsigned char
  93 #endif
  94
  95 #ifdef CONFIG_EBONY
  96 #define ADDR0           0x5555
  97 #define ADDR1           0x2aaa
  98 #define FLASH_WORD_SIZE unsigned char
  99 #endif
 100
 101 /*-----------------------------------------------------------------------
 102  */
 103
 104 unsigned long flash_init (void) {
 105         unsigned long total_b = 0;
 106         unsigned long size_b[CFG_MAX_FLASH_BANKS];
 107         unsigned char * fpga_base = (unsigned char *)CFG_FPGA_BASE;
 108         unsigned char switch_status;
 109         unsigned short index = 0;
 110         int i;
 111
 112
 113         /* read FPGA base register FPGA_REG0 */
 114         switch_status = *fpga_base;
 115
 116         /* check the bitmap of switch status */
 117         if (switch_status & BOOT_SMALL_FLASH) {
 118                 index += BOOT_SMALL_FLASH_VAL;
 119         }
 120         if (switch_status & FLASH_ONBD_N) {
 121                 index += FLASH_ONBD_N_VAL;
 122         }
 123         if (switch_status & FLASH_SRAM_SEL) {
 124                 index += FLASH_SRAM_SEL_VAL;
 125         }
 126
 127     DEBUGF("\n");
 128         DEBUGF("FLASH: Index: %d\n", index);
 129
 130         /* Init: no FLASHes known */
 131         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 132                 flash_info[i].flash_id = FLASH_UNKNOWN;
 133                 flash_info[i].sector_count = -1;
 134                 flash_info[i].size = 0;
 135
 136                 /* check whether the address is 0 */
 137                 if (flash_addr_table[index][i] == 0) {
 138                         continue;
 139                 }
 140
 141                 /* call flash_get_size() to initialize sector address */
 142                 size_b[i] = flash_get_size(
 143                         (vu_long *)flash_addr_table[index][i], &flash_info[i]);
 144                 flash_info[i].size = size_b[i];
 145                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 146                         printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 147                                 i, size_b[i], size_b[i]<<20);
 148                         flash_info[i].sector_count = -1;
 149                         flash_info[i].size = 0;
 150                 }
 151
 152                 total_b += flash_info[i].size;
 153         }
 154
 155         return total_b;
 156 }
 157
 158
 159
 160 /*-----------------------------------------------------------------------
 161  */
 162 #if 0
 163 static void flash_get_offsets (ulong base, flash_info_t *info)
 164 {
 165         int i;
 166
 167         /* set up sector start address table */
 168         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 169             (info->flash_id  == FLASH_AM040) ||
 170             (info->flash_id  == FLASH_AMD016)) {
 171                 for (i = 0; i < info->sector_count; i++)
 172                         info->start[i] = base + (i * 0x00010000);
 173         } else {
 174                 if (info->flash_id & FLASH_BTYPE) {
 175                         /* set sector offsets for bottom boot block type        */
 176                         info->start[0] = base + 0x00000000;
 177                         info->start[1] = base + 0x00004000;
 178                         info->start[2] = base + 0x00006000;
 179                         info->start[3] = base + 0x00008000;
 180                         for (i = 4; i < info->sector_count; i++) {
 181                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 182                         }
 183                 } else {
 184                         /* set sector offsets for top boot block type           */
 185                         i = info->sector_count - 1;
 186                         info->start[i--] = base + info->size - 0x00004000;
 187                         info->start[i--] = base + info->size - 0x00006000;
 188                         info->start[i--] = base + info->size - 0x00008000;
 189                         for (; i >= 0; i--) {
 190                                 info->start[i] = base + i * 0x00010000;
 191                         }
 192                 }
 193         }
 194 }
 195 #endif /* 0 */
 196
 197 /*-----------------------------------------------------------------------
 198  */
 199 void flash_print_info  (flash_info_t *info)
 200 {
 201         int i;
 202         int k;
 203         int size;
 204         int erased;
 205         volatile unsigned long *flash;
 206
 207         if (info->flash_id == FLASH_UNKNOWN) {
 208                 printf ("missing or unknown FLASH type\n");
 209                 return;
 210         }
 211
 212         switch (info->flash_id & FLASH_VENDMASK) {
 213         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 214         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 215         case FLASH_MAN_SST:     printf ("SST ");                break;
 216         default:                printf ("Unknown Vendor ");     break;
 217         }
 218
 219         switch (info->flash_id & FLASH_TYPEMASK) {
 220         case FLASH_AMD016:      printf ("AM29F016D (16 Mbit, uniform sector size)\n");
 221                 break;
 222         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 223                 break;
 224         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 225                 break;
 226         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 227                 break;
 228         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 229                 break;
 230         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 231                 break;
 232         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 233                 break;
 234         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 235                 break;
 236         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 237                 break;
 238         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 239                 break;
 240         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 241                 break;
 242         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 243                 break;
 244         default:                printf ("Unknown Chip Type\n");
 245                 break;
 246         }
 247
 248         printf ("  Size: %ld KB in %d Sectors\n",
 249                 info->size >> 10, info->sector_count);
 250
 251         printf ("  Sector Start Addresses:");
 252         for (i=0; i<info->sector_count; ++i) {
 253                 /*
 254                  * Check if whole sector is erased
 255                  */
 256                 if (i != (info->sector_count-1))
 257                         size = info->start[i+1] - info->start[i];
 258                 else
 259                         size = info->start[0] + info->size - info->start[i];
 260                 erased = 1;
 261                 flash = (volatile unsigned long *)info->start[i];
 262                 size = size >> 2;        /* divide by 4 for longword access */
 263                 for (k=0; k<size; k++)
 264                 {
 265                         if (*flash++ != 0xffffffff)
 266                         {
 267                                 erased = 0;
 268                                 break;
 269                         }
 270                 }
 271
 272                 if ((i % 5) == 0)
 273                         printf ("\n   ");
 274                         printf (" %08lX%s%s",
 275                                 info->start[i],
 276                                 erased ? " E" : "  ",
 277                                 info->protect[i] ? "RO " : "   "
 278                                 );
 279                         }
 280                 printf ("\n");
 281                 return;
 282         }
 283
 284 /*-----------------------------------------------------------------------
 285  */
 286
 287
 288 /*-----------------------------------------------------------------------
 289  */
 290
 291 /*
 292  * The following code cannot be run from FLASH!
 293  */
 294         static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 295                 {
 296                         short i;
 297                         FLASH_WORD_SIZE value;
 298                         ulong base = (ulong)addr;
 299                         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 300
 301             DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr );
 302
 303                         /* Write auto select command: read Manufacturer ID */
 304             udelay(10000);
 305                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 306             udelay(1000);
 307                         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 308             udelay(1000);
 309                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 310             udelay(1000);
 311
 312 #ifdef CONFIG_ADCIOP
 313                         value = addr2[2];
 314 #else
 315                         value = addr2[0];
 316 #endif
 317
 318                         DEBUGF("FLASH MANUFACT: %x\n", value);
 319
 320                         switch (value) {
 321                         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 322                                 info->flash_id = FLASH_MAN_AMD;
 323                                 break;
 324                         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 325                                 info->flash_id = FLASH_MAN_FUJ;
 326                                 break;
 327                         case (FLASH_WORD_SIZE)SST_MANUFACT:
 328                                 info->flash_id = FLASH_MAN_SST;
 329                                 break;
 330                         case (FLASH_WORD_SIZE)STM_MANUFACT:
 331                                 info->flash_id = FLASH_MAN_STM;
 332                                 break;
 333                         default:
 334                                 info->flash_id = FLASH_UNKNOWN;
 335                                 info->sector_count = 0;
 336                                 info->size = 0;
 337                                 return (0);                     /* no or unknown flash  */
 338                         }
 339
 340 #ifdef CONFIG_ADCIOP
 341                         value = addr2[0];                       /* device ID            */
 342                         debug ("\ndev_code=%x\n", value);
 343 #else
 344                         value = addr2[1];                       /* device ID            */
 345 #endif
 346
 347                         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 348
 349                         switch (value) {
 350                         case (FLASH_WORD_SIZE)AMD_ID_F016D:
 351                                 info->flash_id += FLASH_AMD016;
 352                                 info->sector_count = 32;
 353                                 info->size = 0x00200000;
 354                                 break;                          /* => 2 MB              */
 355                         case (FLASH_WORD_SIZE)STM_ID_F040B:
 356                                 info->flash_id += FLASH_AM040;
 357                                 info->sector_count = 8;
 358                                 info->size = 0x0080000; /* => 512 ko */
 359                                 break;
 360                         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 361                                 info->flash_id += FLASH_AM040;
 362                                 info->sector_count = 8;
 363                                 info->size = 0x0080000; /* => 512 ko */
 364                                 break;
 365                         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 366                                 info->flash_id += FLASH_AM400T;
 367                                 info->sector_count = 11;
 368                                 info->size = 0x00080000;
 369                                 break;                          /* => 0.5 MB            */
 370
 371                         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 372                                 info->flash_id += FLASH_AM400B;
 373                                 info->sector_count = 11;
 374                                 info->size = 0x00080000;
 375                                 break;                          /* => 0.5 MB            */
 376
 377                         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 378                                 info->flash_id += FLASH_AM800T;
 379                                 info->sector_count = 19;
 380                                 info->size = 0x00100000;
 381                                 break;                          /* => 1 MB              */
 382
 383                         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 384                                 info->flash_id += FLASH_AM800B;
 385                                 info->sector_count = 19;
 386                                 info->size = 0x00100000;
 387                                 break;                          /* => 1 MB              */
 388
 389                         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 390                                 info->flash_id += FLASH_AM160T;
 391                                 info->sector_count = 35;
 392                                 info->size = 0x00200000;
 393                                 break;                          /* => 2 MB              */
 394
 395                         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 396                                 info->flash_id += FLASH_AM160B;
 397                                 info->sector_count = 35;
 398                                 info->size = 0x00200000;
 399                                 break;                          /* => 2 MB              */
 400 #if 0   /* enable when device IDs are available */
 401                         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 402                                 info->flash_id += FLASH_AM320T;
 403                                 info->sector_count = 67;
 404                                 info->size = 0x00400000;
 405                                 break;                          /* => 4 MB              */
 406
 407                         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 408                                 info->flash_id += FLASH_AM320B;
 409                                 info->sector_count = 67;
 410                                 info->size = 0x00400000;
 411                                 break;                          /* => 4 MB              */
 412 #endif
 413                         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 414                                 info->flash_id += FLASH_SST800A;
 415                                 info->sector_count = 16;
 416                                 info->size = 0x00100000;
 417                                 break;                          /* => 1 MB              */
 418
 419                         case (FLASH_WORD_SIZE)SST_ID_xF160A:
 420                                 info->flash_id += FLASH_SST160A;
 421                                 info->sector_count = 32;
 422                                 info->size = 0x00200000;
 423                                 break;                          /* => 2 MB              */
 424
 425                         default:
 426                                 info->flash_id = FLASH_UNKNOWN;
 427                                 return (0);                     /* => no or unknown flash */
 428
 429                         }
 430
 431                         /* set up sector start address table */
 432                         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 433                             (info->flash_id  == FLASH_AM040) ||
 434                             (info->flash_id  == FLASH_AMD016)) {
 435                                 for (i = 0; i < info->sector_count; i++)
 436                                         info->start[i] = base + (i * 0x00010000);
 437                         } else {
 438                                 if (info->flash_id & FLASH_BTYPE) {
 439                                         /* set sector offsets for bottom boot block type        */
 440                                         info->start[0] = base + 0x00000000;
 441                                         info->start[1] = base + 0x00004000;
 442                                         info->start[2] = base + 0x00006000;
 443                                         info->start[3] = base + 0x00008000;
 444                                         for (i = 4; i < info->sector_count; i++) {
 445                                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 446                                         }
 447                                 } else {
 448                                         /* set sector offsets for top boot block type           */
 449                                         i = info->sector_count - 1;
 450                                         info->start[i--] = base + info->size - 0x00004000;
 451                                         info->start[i--] = base + info->size - 0x00006000;
 452                                         info->start[i--] = base + info->size - 0x00008000;
 453                                         for (; i >= 0; i--) {
 454                                                 info->start[i] = base + i * 0x00010000;
 455                                         }
 456                                 }
 457                         }
 458
 459                         /* check for protected sectors */
 460                         for (i = 0; i < info->sector_count; i++) {
 461                                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 462                                 /* D0 = 1 if protected */
 463 #ifdef CONFIG_ADCIOP
 464                                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 465                                 info->protect[i] = addr2[4] & 1;
 466 #else
 467                                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 468                                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 469                                         info->protect[i] = 0;
 470                                 else
 471                                         info->protect[i] = addr2[2] & 1;
 472 #endif
 473                         }
 474
 475                         /*
 476                          * Prevent writes to uninitialized FLASH.
 477                          */
 478                         if (info->flash_id != FLASH_UNKNOWN) {
 479 #if 0 /* test-only */
 480 #ifdef CONFIG_ADCIOP
 481                                 addr2 = (volatile unsigned char *)info->start[0];
 482                                 addr2[ADDR0] = 0xAA;
 483                                 addr2[ADDR1] = 0x55;
 484                                 addr2[ADDR0] = 0xF0;  /* reset bank */
 485 #else
 486                                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 487                                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 488 #endif
 489 #else /* test-only */
 490                                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 491                                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 492 #endif /* test-only */
 493                         }
 494
 495                         return (info->size);
 496                 }
 497
 498         int wait_for_DQ7(flash_info_t *info, int sect)
 499                 {
 500                         ulong start, now, last;
 501                         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 502
 503                         start = get_timer (0);
 504                         last  = start;
 505                         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 506                                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 507                                         printf ("Timeout\n");
 508                                         return -1;
 509                                 }
 510                                 /* show that we're waiting */
 511                                 if ((now - last) > 1000) {  /* every second */
 512                                         putc ('.');
 513                                         last = now;
 514                                 }
 515                         }
 516                         return 0;
 517                 }
 518
 519 /*-----------------------------------------------------------------------
 520  */
 521
 522         int     flash_erase (flash_info_t *info, int s_first, int s_last)
 523                 {
 524                         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 525                         volatile FLASH_WORD_SIZE *addr2;
 526                         int flag, prot, sect, l_sect;
 527                         int i;
 528
 529                         if ((s_first < 0) || (s_first > s_last)) {
 530                                 if (info->flash_id == FLASH_UNKNOWN) {
 531                                         printf ("- missing\n");
 532                                 } else {
 533                                         printf ("- no sectors to erase\n");
 534                                 }
 535                                 return 1;
 536                         }
 537
 538                         if (info->flash_id == FLASH_UNKNOWN) {
 539                                 printf ("Can't erase unknown flash type - aborted\n");
 540                                 return 1;
 541                         }
 542
 543                         prot = 0;
 544                         for (sect=s_first; sect<=s_last; ++sect) {
 545                                 if (info->protect[sect]) {
 546                                         prot++;
 547                                 }
 548                         }
 549
 550                         if (prot) {
 551                                 printf ("- Warning: %d protected sectors will not be erased!\n",
 552                                         prot);
 553                         } else {
 554                                 printf ("\n");
 555                         }
 556
 557                         l_sect = -1;
 558
 559                         /* Disable interrupts which might cause a timeout here */
 560                         flag = disable_interrupts();
 561
 562                         /* Start erase on unprotected sectors */
 563                         for (sect = s_first; sect<=s_last; sect++) {
 564                                 if (info->protect[sect] == 0) { /* not protected */
 565                                         addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 566                                         printf("Erasing sector %p\n", addr2);
 567
 568                                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 569                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 570                                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 571                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 572                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 573                                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 574                                                 addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
 575                                                 for (i=0; i<50; i++)
 576                                                         udelay(1000);  /* wait 1 ms */
 577                                         } else {
 578                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 579                                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 580                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 581                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 582                                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 583                                                 addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 584                                         }
 585                                         l_sect = sect;
 586                                         /*
 587                                          * Wait for each sector to complete, it's more
 588                                          * reliable.  According to AMD Spec, you must
 589                                          * issue all erase commands within a specified
 590                                          * timeout.  This has been seen to fail, especially
 591                                          * if printf()s are included (for debug)!!
 592                                          */
 593                                         wait_for_DQ7(info, sect);
 594                                 }
 595                         }
 596
 597                         /* re-enable interrupts if necessary */
 598                         if (flag)
 599                                 enable_interrupts();
 600
 601                         /* wait at least 80us - let's wait 1 ms */
 602                         udelay (1000);
 603
 604 #if 0
 605                         /*
 606                          * We wait for the last triggered sector
 607                          */
 608                         if (l_sect < 0)
 609                                 goto DONE;
 610                         wait_for_DQ7(info, l_sect);
 611
 612                 DONE:
 613 #endif
 614                         /* reset to read mode */
 615                         addr = (FLASH_WORD_SIZE *)info->start[0];
 616                         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */
 617
 618                         printf (" done\n");
 619                         return 0;
 620                 }
 621
 622 /*-----------------------------------------------------------------------
 623  * Copy memory to flash, returns:
 624  * 0 - OK
 625  * 1 - write timeout
 626  * 2 - Flash not erased
 627  */
 628
 629         int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 630                 {
 631                         ulong cp, wp, data;
 632                         int i, l, rc;
 633
 634                         wp = (addr & ~3);       /* get lower word aligned address */
 635
 636                         /*
 637                          * handle unaligned start bytes
 638                          */
 639                         if ((l = addr - wp) != 0) {
 640                                 data = 0;
 641                                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 642                                         data = (data << 8) | (*(uchar *)cp);
 643                                 }
 644                                 for (; i<4 && cnt>0; ++i) {
 645                                         data = (data << 8) | *src++;
 646                                         --cnt;
 647                                         ++cp;
 648                                 }
 649                                 for (; cnt==0 && i<4; ++i, ++cp) {
 650                                         data = (data << 8) | (*(uchar *)cp);
 651                                 }
 652
 653                                 if ((rc = write_word(info, wp, data)) != 0) {
 654                                         return (rc);
 655                                 }
 656                                 wp += 4;
 657                         }
 658
 659                         /*
 660                          * handle word aligned part
 661                          */
 662                         while (cnt >= 4) {
 663                                 data = 0;
 664                                 for (i=0; i<4; ++i) {
 665                                         data = (data << 8) | *src++;
 666                                 }
 667                                 if ((rc = write_word(info, wp, data)) != 0) {
 668                                         return (rc);
 669                                 }
 670                                 wp  += 4;
 671                                 cnt -= 4;
 672                         }
 673
 674                         if (cnt == 0) {
 675                                 return (0);
 676                         }
 677
 678                         /*
 679                          * handle unaligned tail bytes
 680                          */
 681                         data = 0;
 682                         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 683                                 data = (data << 8) | *src++;
 684                                 --cnt;
 685                         }
 686                         for (; i<4; ++i, ++cp) {
 687                                 data = (data << 8) | (*(uchar *)cp);
 688                         }
 689
 690                         return (write_word(info, wp, data));
 691                 }
 692
 693 /*-----------------------------------------------------------------------
 694  * Write a word to Flash, returns:
 695  * 0 - OK
 696  * 1 - write timeout
 697  * 2 - Flash not erased
 698  */
 699         static int write_word (flash_info_t * info, ulong dest, ulong data)
 700                 {
 701                         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) (info->start[0]);
 702                         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
 703                         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
 704                         ulong start;
 705                         int i;
 706
 707                         /* Check if Flash is (sufficiently) erased */
 708                         if ((*((volatile FLASH_WORD_SIZE *) dest) &
 709                              (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
 710                                 return (2);
 711                         }
 712
 713                         for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
 714                                 int flag;
 715
 716                                 /* Disable interrupts which might cause a timeout here */
 717                                 flag = disable_interrupts ();
 718
 719                                 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 720                                 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 721                                 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
 722
 723                                 dest2[i] = data2[i];
 724
 725                                 /* re-enable interrupts if necessary */
 726                                 if (flag)
 727                                         enable_interrupts ();
 728
 729                                 /* data polling for D7 */
 730                                 start = get_timer (0);
 731                                 while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
 732                                        (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
 733
 734                                         if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 735                                                 return (1);
 736                                         }
 737                                 }
 738                         }
 739
 740                         return (0);
 741                 }
 742
 743 /*-----------------------------------------------------------------------
 744  */