git.sur5r.net Git - u-boot/blob - 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 #if 0
 162 static void flash_get_offsets (ulong base, flash_info_t *info)
 163 {
 164         int i;
 165
 166         /* set up sector start address table */
 167         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 168             (info->flash_id  == FLASH_AM040) ||
 169             (info->flash_id  == FLASH_AMD016)) {
 170                 for (i = 0; i < info->sector_count; i++)
 171                         info->start[i] = base + (i * 0x00010000);
 172         } else {
 173                 if (info->flash_id & FLASH_BTYPE) {
 174                         /* set sector offsets for bottom boot block type        */
 175                         info->start[0] = base + 0x00000000;
 176                         info->start[1] = base + 0x00004000;
 177                         info->start[2] = base + 0x00006000;
 178                         info->start[3] = base + 0x00008000;
 179                         for (i = 4; i < info->sector_count; i++) {
 180                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 181                         }
 182                 } else {
 183                         /* set sector offsets for top boot block type           */
 184                         i = info->sector_count - 1;
 185                         info->start[i--] = base + info->size - 0x00004000;
 186                         info->start[i--] = base + info->size - 0x00006000;
 187                         info->start[i--] = base + info->size - 0x00008000;
 188                         for (; i >= 0; i--) {
 189                                 info->start[i] = base + i * 0x00010000;
 190                         }
 191                 }
 192         }
 193 }
 194 #endif /* 0 */
 195
 196 /*-----------------------------------------------------------------------
 197  */
 198 void flash_print_info  (flash_info_t *info)
 199 {
 200         int i;
 201         int k;
 202         int size;
 203         int erased;
 204         volatile unsigned long *flash;
 205
 206         if (info->flash_id == FLASH_UNKNOWN) {
 207                 printf ("missing or unknown FLASH type\n");
 208                 return;
 209         }
 210
 211         switch (info->flash_id & FLASH_VENDMASK) {
 212         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 213         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 214         case FLASH_MAN_SST:     printf ("SST ");                break;
 215         default:                printf ("Unknown Vendor ");     break;
 216         }
 217
 218         switch (info->flash_id & FLASH_TYPEMASK) {
 219         case FLASH_AMD016:      printf ("AM29F016D (16 Mbit, uniform sector size)\n");
 220                 break;
 221         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 222                 break;
 223         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 224                 break;
 225         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 226                 break;
 227         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 228                 break;
 229         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 230                 break;
 231         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 232                 break;
 233         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 234                 break;
 235         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 236                 break;
 237         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 238                 break;
 239         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 240                 break;
 241         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 242                 break;
 243         default:                printf ("Unknown Chip Type\n");
 244                 break;
 245         }
 246
 247         printf ("  Size: %ld KB in %d Sectors\n",
 248                 info->size >> 10, info->sector_count);
 249
 250         printf ("  Sector Start Addresses:");
 251         for (i=0; i<info->sector_count; ++i) {
 252                 /*
 253                  * Check if whole sector is erased
 254                  */
 255                 if (i != (info->sector_count-1))
 256                         size = info->start[i+1] - info->start[i];
 257                 else
 258                         size = info->start[0] + info->size - info->start[i];
 259                 erased = 1;
 260                 flash = (volatile unsigned long *)info->start[i];
 261                 size = size >> 2;        /* divide by 4 for longword access */
 262                 for (k=0; k<size; k++)
 263                 {
 264                         if (*flash++ != 0xffffffff)
 265                         {
 266                                 erased = 0;
 267                                 break;
 268                         }
 269                 }
 270
 271                 if ((i % 5) == 0)
 272                         printf ("\n   ");
 273                         printf (" %08lX%s%s",
 274                                 info->start[i],
 275                                 erased ? " E" : "  ",
 276                                 info->protect[i] ? "RO " : "   "
 277                                 );
 278                         }
 279                 printf ("\n");
 280                 return;
 281         }
 282
 283 /*-----------------------------------------------------------------------
 284  */
 285
 286
 287 /*-----------------------------------------------------------------------
 288  */
 289
 290 /*
 291  * The following code cannot be run from FLASH!
 292  */
 293         static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 294                 {
 295                         short i;
 296                         FLASH_WORD_SIZE value;
 297                         ulong base = (ulong)addr;
 298                         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 299
 300             DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr );
 301
 302                         /* Write auto select command: read Manufacturer ID */
 303             udelay(10000);
 304                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 305             udelay(1000);
 306                         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 307             udelay(1000);
 308                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 309             udelay(1000);
 310
 311 #ifdef CONFIG_ADCIOP
 312                         value = addr2[2];
 313 #else
 314                         value = addr2[0];
 315 #endif
 316
 317                         DEBUGF("FLASH MANUFACT: %x\n", value);
 318
 319                         switch (value) {
 320                         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 321                                 info->flash_id = FLASH_MAN_AMD;
 322                                 break;
 323                         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 324                                 info->flash_id = FLASH_MAN_FUJ;
 325                                 break;
 326                         case (FLASH_WORD_SIZE)SST_MANUFACT:
 327                                 info->flash_id = FLASH_MAN_SST;
 328                                 break;
 329                         case (FLASH_WORD_SIZE)STM_MANUFACT:
 330                                 info->flash_id = FLASH_MAN_STM;
 331                                 break;
 332                         default:
 333                                 info->flash_id = FLASH_UNKNOWN;
 334                                 info->sector_count = 0;
 335                                 info->size = 0;
 336                                 return (0);                     /* no or unknown flash  */
 337                         }
 338
 339 #ifdef CONFIG_ADCIOP
 340                         value = addr2[0];                       /* device ID            */
 341                         debug ("\ndev_code=%x\n", value);
 342 #else
 343                         value = addr2[1];                       /* device ID            */
 344 #endif
 345
 346                         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 347
 348                         switch (value) {
 349                         case (FLASH_WORD_SIZE)AMD_ID_F016D:
 350                                 info->flash_id += FLASH_AMD016;
 351                                 info->sector_count = 32;
 352                                 info->size = 0x00200000;
 353                                 break;                          /* => 2 MB              */
 354                         case (FLASH_WORD_SIZE)STM_ID_F040B:
 355                                 info->flash_id += FLASH_AM040;
 356                                 info->sector_count = 8;
 357                                 info->size = 0x0080000; /* => 512 ko */
 358                                 break;
 359                         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 360                                 info->flash_id += FLASH_AM040;
 361                                 info->sector_count = 8;
 362                                 info->size = 0x0080000; /* => 512 ko */
 363                                 break;
 364                         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 365                                 info->flash_id += FLASH_AM400T;
 366                                 info->sector_count = 11;
 367                                 info->size = 0x00080000;
 368                                 break;                          /* => 0.5 MB            */
 369
 370                         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 371                                 info->flash_id += FLASH_AM400B;
 372                                 info->sector_count = 11;
 373                                 info->size = 0x00080000;
 374                                 break;                          /* => 0.5 MB            */
 375
 376                         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 377                                 info->flash_id += FLASH_AM800T;
 378                                 info->sector_count = 19;
 379                                 info->size = 0x00100000;
 380                                 break;                          /* => 1 MB              */
 381
 382                         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 383                                 info->flash_id += FLASH_AM800B;
 384                                 info->sector_count = 19;
 385                                 info->size = 0x00100000;
 386                                 break;                          /* => 1 MB              */
 387
 388                         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 389                                 info->flash_id += FLASH_AM160T;
 390                                 info->sector_count = 35;
 391                                 info->size = 0x00200000;
 392                                 break;                          /* => 2 MB              */
 393
 394                         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 395                                 info->flash_id += FLASH_AM160B;
 396                                 info->sector_count = 35;
 397                                 info->size = 0x00200000;
 398                                 break;                          /* => 2 MB              */
 399 #if 0   /* enable when device IDs are available */
 400                         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 401                                 info->flash_id += FLASH_AM320T;
 402                                 info->sector_count = 67;
 403                                 info->size = 0x00400000;
 404                                 break;                          /* => 4 MB              */
 405
 406                         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 407                                 info->flash_id += FLASH_AM320B;
 408                                 info->sector_count = 67;
 409                                 info->size = 0x00400000;
 410                                 break;                          /* => 4 MB              */
 411 #endif
 412                         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 413                                 info->flash_id += FLASH_SST800A;
 414                                 info->sector_count = 16;
 415                                 info->size = 0x00100000;
 416                                 break;                          /* => 1 MB              */
 417
 418                         case (FLASH_WORD_SIZE)SST_ID_xF160A:
 419                                 info->flash_id += FLASH_SST160A;
 420                                 info->sector_count = 32;
 421                                 info->size = 0x00200000;
 422                                 break;                          /* => 2 MB              */
 423
 424                         default:
 425                                 info->flash_id = FLASH_UNKNOWN;
 426                                 return (0);                     /* => no or unknown flash */
 427
 428                         }
 429
 430                         /* set up sector start address table */
 431                         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 432                             (info->flash_id  == FLASH_AM040) ||
 433                             (info->flash_id  == FLASH_AMD016)) {
 434                                 for (i = 0; i < info->sector_count; i++)
 435                                         info->start[i] = base + (i * 0x00010000);
 436                         } else {
 437                                 if (info->flash_id & FLASH_BTYPE) {
 438                                         /* set sector offsets for bottom boot block type        */
 439                                         info->start[0] = base + 0x00000000;
 440                                         info->start[1] = base + 0x00004000;
 441                                         info->start[2] = base + 0x00006000;
 442                                         info->start[3] = base + 0x00008000;
 443                                         for (i = 4; i < info->sector_count; i++) {
 444                                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 445                                         }
 446                                 } else {
 447                                         /* set sector offsets for top boot block type           */
 448                                         i = info->sector_count - 1;
 449                                         info->start[i--] = base + info->size - 0x00004000;
 450                                         info->start[i--] = base + info->size - 0x00006000;
 451                                         info->start[i--] = base + info->size - 0x00008000;
 452                                         for (; i >= 0; i--) {
 453                                                 info->start[i] = base + i * 0x00010000;
 454                                         }
 455                                 }
 456                         }
 457
 458                         /* check for protected sectors */
 459                         for (i = 0; i < info->sector_count; i++) {
 460                                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 461                                 /* D0 = 1 if protected */
 462 #ifdef CONFIG_ADCIOP
 463                                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 464                                 info->protect[i] = addr2[4] & 1;
 465 #else
 466                                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 467                                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 468                                         info->protect[i] = 0;
 469                                 else
 470                                         info->protect[i] = addr2[2] & 1;
 471 #endif
 472                         }
 473
 474                         /*
 475                          * Prevent writes to uninitialized FLASH.
 476                          */
 477                         if (info->flash_id != FLASH_UNKNOWN) {
 478 #if 0 /* test-only */
 479 #ifdef CONFIG_ADCIOP
 480                                 addr2 = (volatile unsigned char *)info->start[0];
 481                                 addr2[ADDR0] = 0xAA;
 482                                 addr2[ADDR1] = 0x55;
 483                                 addr2[ADDR0] = 0xF0;  /* reset bank */
 484 #else
 485                                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 486                                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 487 #endif
 488 #else /* test-only */
 489                                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 490                                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 491 #endif /* test-only */
 492                         }
 493
 494                         return (info->size);
 495                 }
 496
 497         int wait_for_DQ7(flash_info_t *info, int sect)
 498                 {
 499                         ulong start, now, last;
 500                         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 501
 502                         start = get_timer (0);
 503                         last  = start;
 504                         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 505                                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 506                                         printf ("Timeout\n");
 507                                         return -1;
 508                                 }
 509                                 /* show that we're waiting */
 510                                 if ((now - last) > 1000) {  /* every second */
 511                                         putc ('.');
 512                                         last = now;
 513                                 }
 514                         }
 515                         return 0;
 516                 }
 517
 518 /*-----------------------------------------------------------------------
 519  */
 520
 521         int     flash_erase (flash_info_t *info, int s_first, int s_last)
 522                 {
 523                         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 524                         volatile FLASH_WORD_SIZE *addr2;
 525                         int flag, prot, sect, l_sect;
 526                         int i;
 527
 528                         if ((s_first < 0) || (s_first > s_last)) {
 529                                 if (info->flash_id == FLASH_UNKNOWN) {
 530                                         printf ("- missing\n");
 531                                 } else {
 532                                         printf ("- no sectors to erase\n");
 533                                 }
 534                                 return 1;
 535                         }
 536
 537                         if (info->flash_id == FLASH_UNKNOWN) {
 538                                 printf ("Can't erase unknown flash type - aborted\n");
 539                                 return 1;
 540                         }
 541
 542                         prot = 0;
 543                         for (sect=s_first; sect<=s_last; ++sect) {
 544                                 if (info->protect[sect]) {
 545                                         prot++;
 546                                 }
 547                         }
 548
 549                         if (prot) {
 550                                 printf ("- Warning: %d protected sectors will not be erased!\n",
 551                                         prot);
 552                         } else {
 553                                 printf ("\n");
 554                         }
 555
 556                         l_sect = -1;
 557
 558                         /* Disable interrupts which might cause a timeout here */
 559                         flag = disable_interrupts();
 560
 561                         /* Start erase on unprotected sectors */
 562                         for (sect = s_first; sect<=s_last; sect++) {
 563                                 if (info->protect[sect] == 0) { /* not protected */
 564                                         addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 565                                         printf("Erasing sector %p\n", addr2);
 566
 567                                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 568                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 569                                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 570                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 571                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 572                                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 573                                                 addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
 574                                                 for (i=0; i<50; i++)
 575                                                         udelay(1000);  /* wait 1 ms */
 576                                         } else {
 577                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 578                                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 579                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 580                                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 581                                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 582                                                 addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 583                                         }
 584                                         l_sect = sect;
 585                                         /*
 586                                          * Wait for each sector to complete, it's more
 587                                          * reliable.  According to AMD Spec, you must
 588                                          * issue all erase commands within a specified
 589                                          * timeout.  This has been seen to fail, especially
 590                                          * if printf()s are included (for debug)!!
 591                                          */
 592                                         wait_for_DQ7(info, sect);
 593                                 }
 594                         }
 595
 596                         /* re-enable interrupts if necessary */
 597                         if (flag)
 598                                 enable_interrupts();
 599
 600                         /* wait at least 80us - let's wait 1 ms */
 601                         udelay (1000);
 602
 603 #if 0
 604                         /*
 605                          * We wait for the last triggered sector
 606                          */
 607                         if (l_sect < 0)
 608                                 goto DONE;
 609                         wait_for_DQ7(info, l_sect);
 610
 611                 DONE:
 612 #endif
 613                         /* reset to read mode */
 614                         addr = (FLASH_WORD_SIZE *)info->start[0];
 615                         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */
 616
 617                         printf (" done\n");
 618                         return 0;
 619                 }
 620
 621 /*-----------------------------------------------------------------------
 622  * Copy memory to flash, returns:
 623  * 0 - OK
 624  * 1 - write timeout
 625  * 2 - Flash not erased
 626  */
 627
 628         int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 629                 {
 630                         ulong cp, wp, data;
 631                         int i, l, rc;
 632
 633                         wp = (addr & ~3);       /* get lower word aligned address */
 634
 635                         /*
 636                          * handle unaligned start bytes
 637                          */
 638                         if ((l = addr - wp) != 0) {
 639                                 data = 0;
 640                                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 641                                         data = (data << 8) | (*(uchar *)cp);
 642                                 }
 643                                 for (; i<4 && cnt>0; ++i) {
 644                                         data = (data << 8) | *src++;
 645                                         --cnt;
 646                                         ++cp;
 647                                 }
 648                                 for (; cnt==0 && i<4; ++i, ++cp) {
 649                                         data = (data << 8) | (*(uchar *)cp);
 650                                 }
 651
 652                                 if ((rc = write_word(info, wp, data)) != 0) {
 653                                         return (rc);
 654                                 }
 655                                 wp += 4;
 656                         }
 657
 658                         /*
 659                          * handle word aligned part
 660                          */
 661                         while (cnt >= 4) {
 662                                 data = 0;
 663                                 for (i=0; i<4; ++i) {
 664                                         data = (data << 8) | *src++;
 665                                 }
 666                                 if ((rc = write_word(info, wp, data)) != 0) {
 667                                         return (rc);
 668                                 }
 669                                 wp  += 4;
 670                                 cnt -= 4;
 671                         }
 672
 673                         if (cnt == 0) {
 674                                 return (0);
 675                         }
 676
 677                         /*
 678                          * handle unaligned tail bytes
 679                          */
 680                         data = 0;
 681                         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 682                                 data = (data << 8) | *src++;
 683                                 --cnt;
 684                         }
 685                         for (; i<4; ++i, ++cp) {
 686                                 data = (data << 8) | (*(uchar *)cp);
 687                         }
 688
 689                         return (write_word(info, wp, data));
 690                 }
 691
 692 /*-----------------------------------------------------------------------
 693  * Write a word to Flash, returns:
 694  * 0 - OK
 695  * 1 - write timeout
 696  * 2 - Flash not erased
 697  */
 698         static int write_word (flash_info_t * info, ulong dest, ulong data)
 699                 {
 700                         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) (info->start[0]);
 701                         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
 702                         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
 703                         ulong start;
 704                         int i;
 705
 706                         /* Check if Flash is (sufficiently) erased */
 707                         if ((*((volatile FLASH_WORD_SIZE *) dest) &
 708                              (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
 709                                 return (2);
 710                         }
 711
 712                         for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
 713                                 int flag;
 714
 715                                 /* Disable interrupts which might cause a timeout here */
 716                                 flag = disable_interrupts ();
 717
 718                                 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 719                                 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 720                                 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
 721
 722                                 dest2[i] = data2[i];
 723
 724                                 /* re-enable interrupts if necessary */
 725                                 if (flag)
 726                                         enable_interrupts ();
 727
 728                                 /* data polling for D7 */
 729                                 start = get_timer (0);
 730                                 while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
 731                                        (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
 732
 733                                         if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 734                                                 return (1);
 735                                         }
 736                                 }
 737                         }
 738
 739                         return (0);
 740                 }
 741
 742 /*-----------------------------------------------------------------------
 743  */