board/bubinga405ep/flash.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * Modified 4/5/2001
  26  * Wait for completion of each sector erase command issued
  27  * 4/5/2001
  28  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  29  */
  30
  31 #include <common.h>
  32 #include <ppc4xx.h>
  33 #include <asm/processor.h>
  34
  35 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  36
  37 /*-----------------------------------------------------------------------
  38  * Functions
  39  */
  40 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  41 static int write_word (flash_info_t *info, ulong dest, ulong data);
  42 static void flash_get_offsets (ulong base, flash_info_t *info);
  43
  44 #ifdef CONFIG_ADCIOP
  45 #define ADDR0           0x0aa9
  46 #define ADDR1           0x0556
  47 #define FLASH_WORD_SIZE unsigned char
  48 #endif
  49
  50 #ifdef CONFIG_CPCI405
  51 #define ADDR0           0x5555
  52 #define ADDR1           0x2aaa
  53 #define FLASH_WORD_SIZE unsigned short
  54 #endif
  55
  56 #ifdef CONFIG_WALNUT405
  57 #define ADDR0           0x5555
  58 #define ADDR1           0x2aaa
  59 #define FLASH_WORD_SIZE unsigned char
  60 #endif
  61
  62 #ifdef CONFIG_BUBINGA405EP
  63 #define ADDR0           0x5555
  64 #define ADDR1           0x2aaa
  65 #define FLASH_WORD_SIZE unsigned char
  66 #endif
  67
  68
  69 /*-----------------------------------------------------------------------
  70  */
  71
  72 unsigned long flash_init (void)
  73 {
  74         unsigned long size_b0, size_b1;
  75         int i;
  76         uint pbcr;
  77         unsigned long base_b0, base_b1;
  78
  79         /* Init: no FLASHes known */
  80         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
  81                 flash_info[i].flash_id = FLASH_UNKNOWN;
  82         }
  83
  84         /* Static FLASH Bank configuration here - FIXME XXX */
  85
  86         size_b0 = flash_get_size ((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
  87
  88         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  89                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  90                         size_b0, size_b0 << 20);
  91         }
  92
  93         /* Only one bank */
  94         if (CFG_MAX_FLASH_BANKS == 1) {
  95                 /* Setup offsets */
  96                 flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
  97
  98                 /* Monitor protection ON by default */
  99                 (void) flash_protect (FLAG_PROTECT_SET,
 100                                       FLASH_BASE0_PRELIM,
 101                                       FLASH_BASE0_PRELIM + CFG_MONITOR_LEN - 1,
 102                                       &flash_info[0]);
 103                 /* Also protect sector containing initial power-up instruction */
 104                 (void) flash_protect (FLAG_PROTECT_SET,
 105                                       0xFFFFFFFC, 0xFFFFFFFF, &flash_info[0]);
 106                 size_b1 = 0;
 107                 flash_info[0].size = size_b0;
 108         }
 109
 110         /* 2 banks */
 111         else {
 112                 size_b1 = flash_get_size ((vu_long *) FLASH_BASE1_PRELIM, &flash_info[1]);
 113
 114                 /* Re-do sizing to get full correct info */
 115
 116                 if (size_b1) {
 117                         mtdcr (ebccfga, pb0cr);
 118                         pbcr = mfdcr (ebccfgd);
 119                         mtdcr (ebccfga, pb0cr);
 120                         base_b1 = -size_b1;
 121                         pbcr = (pbcr & 0x0001ffff) | base_b1 |
 122                                 (((size_b1 / 1024 / 1024) - 1) << 17);
 123                         mtdcr (ebccfgd, pbcr);
 124                         /*          printf("pb1cr = %x\n", pbcr); */
 125                 }
 126
 127                 if (size_b0) {
 128                         mtdcr (ebccfga, pb1cr);
 129                         pbcr = mfdcr (ebccfgd);
 130                         mtdcr (ebccfga, pb1cr);
 131                         base_b0 = base_b1 - size_b0;
 132                         pbcr = (pbcr & 0x0001ffff) | base_b0 |
 133                                 (((size_b0 / 1024 / 1024) - 1) << 17);
 134                         mtdcr (ebccfgd, pbcr);
 135                         /*            printf("pb0cr = %x\n", pbcr); */
 136                 }
 137
 138                 size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
 139
 140                 flash_get_offsets (base_b0, &flash_info[0]);
 141
 142                 /* monitor protection ON by default */
 143                 (void) flash_protect (FLAG_PROTECT_SET,
 144                                       base_b0 + size_b0 - CFG_MONITOR_LEN,
 145                                       base_b0 + size_b0 - 1, &flash_info[0]);
 146                 /* Also protect sector containing initial power-up instruction */
 147                 /* (flash_protect() checks address range - other call ignored) */
 148                 (void) flash_protect (FLAG_PROTECT_SET,
 149                                       0xFFFFFFFC, 0xFFFFFFFF, &flash_info[0]);
 150                 (void) flash_protect (FLAG_PROTECT_SET,
 151                                       0xFFFFFFFC, 0xFFFFFFFF, &flash_info[1]);
 152
 153                 if (size_b1) {
 154                         /* Re-do sizing to get full correct info */
 155                         size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
 156
 157                         flash_get_offsets (base_b1, &flash_info[1]);
 158
 159                         /* monitor protection ON by default */
 160                         (void) flash_protect (FLAG_PROTECT_SET,
 161                                               base_b1 + size_b1 - CFG_MONITOR_LEN,
 162                                               base_b1 + size_b1 - 1,
 163                                               &flash_info[1]);
 164                         /* monitor protection OFF by default (one is enough) */
 165                         (void) flash_protect (FLAG_PROTECT_CLEAR,
 166                                               base_b0 + size_b0 - CFG_MONITOR_LEN,
 167                                               base_b0 + size_b0 - 1,
 168                                               &flash_info[0]);
 169                 } else {
 170                         flash_info[1].flash_id = FLASH_UNKNOWN;
 171                         flash_info[1].sector_count = -1;
 172                 }
 173
 174                 flash_info[0].size = size_b0;
 175                 flash_info[1].size = size_b1;
 176         }                       /* else 2 banks */
 177         return (size_b0 + size_b1);
 178 }
 179
 180
 181 /*-----------------------------------------------------------------------
 182  */
 183 static void flash_get_offsets (ulong base, flash_info_t * info)
 184 {
 185         int i;
 186
 187         /* set up sector start address table */
 188         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 189             (info->flash_id == FLASH_AM040)) {
 190                 for (i = 0; i < info->sector_count; i++)
 191                         info->start[i] = base + (i * 0x00010000);
 192         } else {
 193                 if (info->flash_id & FLASH_BTYPE) {
 194                         /* set sector offsets for bottom boot block type        */
 195                         info->start[0] = base + 0x00000000;
 196                         info->start[1] = base + 0x00004000;
 197                         info->start[2] = base + 0x00006000;
 198                         info->start[3] = base + 0x00008000;
 199                         for (i = 4; i < info->sector_count; i++) {
 200                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 201                         }
 202                 } else {
 203                         /* set sector offsets for top boot block type           */
 204                         i = info->sector_count - 1;
 205                         info->start[i--] = base + info->size - 0x00004000;
 206                         info->start[i--] = base + info->size - 0x00006000;
 207                         info->start[i--] = base + info->size - 0x00008000;
 208                         for (; i >= 0; i--) {
 209                                 info->start[i] = base + i * 0x00010000;
 210                         }
 211                 }
 212         }
 213 }
 214
 215 /*-----------------------------------------------------------------------
 216  */
 217 void flash_print_info (flash_info_t * info)
 218 {
 219         int i;
 220         int k;
 221         int size;
 222         int erased;
 223         volatile unsigned long *flash;
 224
 225         if (info->flash_id == FLASH_UNKNOWN) {
 226                 printf ("missing or unknown FLASH type\n");
 227                 return;
 228         }
 229
 230         switch (info->flash_id & FLASH_VENDMASK) {
 231         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 232         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 233         case FLASH_MAN_SST:     printf ("SST ");                break;
 234         default:                printf ("Unknown Vendor ");     break;
 235         }
 236
 237         switch (info->flash_id & FLASH_TYPEMASK) {
 238         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 239                                 break;
 240         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 241                                 break;
 242         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 243                                 break;
 244         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 245                                 break;
 246         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 247                                 break;
 248         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 249                                 break;
 250         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 251                                 break;
 252         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 253                                 break;
 254         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 255                                 break;
 256         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 257                                 break;
 258         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 259                                 break;
 260         default:                printf ("Unknown Chip Type\n");
 261                                 break;
 262         }
 263
 264         printf ("  Size: %ld KB in %d Sectors\n",
 265                 info->size >> 10, info->sector_count);
 266
 267         printf ("  Sector Start Addresses:");
 268         for (i = 0; i < info->sector_count; ++i) {
 269                 /*
 270                  * Check if whole sector is erased
 271                  */
 272                 if (i != (info->sector_count - 1))
 273                         size = info->start[i + 1] - info->start[i];
 274                 else
 275                         size = info->start[0] + info->size - info->start[i];
 276                 erased = 1;
 277                 flash = (volatile unsigned long *) info->start[i];
 278                 size = size >> 2;       /* divide by 4 for longword access */
 279                 for (k = 0; k < size; k++) {
 280                         if (*flash++ != 0xffffffff) {
 281                                 erased = 0;
 282                                 break;
 283                         }
 284                 }
 285
 286                 if ((i % 5) == 0)
 287                         printf ("\n   ");
 288 #if 0                           /* test-only */
 289                 printf (" %08lX%s",
 290                         info->start[i], info->protect[i] ? " (RO)" : "     "
 291 #else
 292                 printf (" %08lX%s%s",
 293                         info->start[i],
 294                         erased ? " E" : "  ", info->protect[i] ? "RO " : "   "
 295 #endif
 296                         );
 297         }
 298         printf ("\n");
 299         return;
 300 }
 301
 302 /*-----------------------------------------------------------------------
 303  */
 304
 305
 306 /*-----------------------------------------------------------------------
 307  */
 308
 309 /*
 310  * The following code cannot be run from FLASH!
 311  */
 312 static ulong flash_get_size (vu_long * addr, flash_info_t * info)
 313 {
 314         short i;
 315         FLASH_WORD_SIZE value;
 316         ulong base = (ulong) addr;
 317         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
 318
 319         /* Write auto select command: read Manufacturer ID */
 320         addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 321         addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 322         addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090;
 323
 324 #ifdef CONFIG_ADCIOP
 325         value = addr2[2];
 326 #else
 327         value = addr2[0];
 328 #endif
 329
 330         switch (value) {
 331         case (FLASH_WORD_SIZE) AMD_MANUFACT:
 332                 info->flash_id = FLASH_MAN_AMD;
 333                 break;
 334         case (FLASH_WORD_SIZE) FUJ_MANUFACT:
 335                 info->flash_id = FLASH_MAN_FUJ;
 336                 break;
 337         case (FLASH_WORD_SIZE) SST_MANUFACT:
 338                 info->flash_id = FLASH_MAN_SST;
 339                 break;
 340         default:
 341                 info->flash_id = FLASH_UNKNOWN;
 342                 info->sector_count = 0;
 343                 info->size = 0;
 344                 return (0);     /* no or unknown flash  */
 345         }
 346
 347 #ifdef CONFIG_ADCIOP
 348         value = addr2[0];       /* device ID            */
 349         /*        printf("\ndev_code=%x\n", value); */
 350 #else
 351         value = addr2[1];       /* device ID            */
 352 #endif
 353
 354         switch (value) {
 355         case (FLASH_WORD_SIZE) AMD_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_LV400T:
 361                 info->flash_id += FLASH_AM400T;
 362                 info->sector_count = 11;
 363                 info->size = 0x00080000;
 364                 break;          /* => 0.5 MB            */
 365
 366         case (FLASH_WORD_SIZE) AMD_ID_LV400B:
 367                 info->flash_id += FLASH_AM400B;
 368                 info->sector_count = 11;
 369                 info->size = 0x00080000;
 370                 break;          /* => 0.5 MB            */
 371
 372         case (FLASH_WORD_SIZE) AMD_ID_LV800T:
 373                 info->flash_id += FLASH_AM800T;
 374                 info->sector_count = 19;
 375                 info->size = 0x00100000;
 376                 break;          /* => 1 MB              */
 377
 378         case (FLASH_WORD_SIZE) AMD_ID_LV800B:
 379                 info->flash_id += FLASH_AM800B;
 380                 info->sector_count = 19;
 381                 info->size = 0x00100000;
 382                 break;          /* => 1 MB              */
 383
 384         case (FLASH_WORD_SIZE) AMD_ID_LV160T:
 385                 info->flash_id += FLASH_AM160T;
 386                 info->sector_count = 35;
 387                 info->size = 0x00200000;
 388                 break;          /* => 2 MB              */
 389
 390         case (FLASH_WORD_SIZE) AMD_ID_LV160B:
 391                 info->flash_id += FLASH_AM160B;
 392                 info->sector_count = 35;
 393                 info->size = 0x00200000;
 394                 break;          /* => 2 MB              */
 395 #if 0                           /* enable when device IDs are available */
 396         case (FLASH_WORD_SIZE) AMD_ID_LV320T:
 397                 info->flash_id += FLASH_AM320T;
 398                 info->sector_count = 67;
 399                 info->size = 0x00400000;
 400                 break;          /* => 4 MB              */
 401
 402         case (FLASH_WORD_SIZE) AMD_ID_LV320B:
 403                 info->flash_id += FLASH_AM320B;
 404                 info->sector_count = 67;
 405                 info->size = 0x00400000;
 406                 break;          /* => 4 MB              */
 407 #endif
 408         case (FLASH_WORD_SIZE) SST_ID_xF800A:
 409                 info->flash_id += FLASH_SST800A;
 410                 info->sector_count = 16;
 411                 info->size = 0x00100000;
 412                 break;          /* => 1 MB              */
 413
 414         case (FLASH_WORD_SIZE) SST_ID_xF160A:
 415                 info->flash_id += FLASH_SST160A;
 416                 info->sector_count = 32;
 417                 info->size = 0x00200000;
 418                 break;          /* => 2 MB              */
 419
 420         default:
 421                 info->flash_id = FLASH_UNKNOWN;
 422                 return (0);     /* => no or unknown flash */
 423
 424         }
 425
 426         /* set up sector start address table */
 427         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 428             (info->flash_id == FLASH_AM040)) {
 429                 for (i = 0; i < info->sector_count; i++)
 430                         info->start[i] = base + (i * 0x00010000);
 431         } else {
 432                 if (info->flash_id & FLASH_BTYPE) {
 433                         /* set sector offsets for bottom boot block type        */
 434                         info->start[0] = base + 0x00000000;
 435                         info->start[1] = base + 0x00004000;
 436                         info->start[2] = base + 0x00006000;
 437                         info->start[3] = base + 0x00008000;
 438                         for (i = 4; i < info->sector_count; i++) {
 439                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 440                         }
 441                 } else {
 442                         /* set sector offsets for top boot block type           */
 443                         i = info->sector_count - 1;
 444                         info->start[i--] = base + info->size - 0x00004000;
 445                         info->start[i--] = base + info->size - 0x00006000;
 446                         info->start[i--] = base + info->size - 0x00008000;
 447                         for (; i >= 0; i--) {
 448                                 info->start[i] = base + i * 0x00010000;
 449                         }
 450                 }
 451         }
 452
 453         /* check for protected sectors */
 454         for (i = 0; i < info->sector_count; i++) {
 455                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 456                 /* D0 = 1 if protected */
 457 #ifdef CONFIG_ADCIOP
 458                 addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
 459                 info->protect[i] = addr2[4] & 1;
 460 #else
 461                 addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
 462                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 463                         info->protect[i] = 0;
 464                 else
 465                         info->protect[i] = addr2[2] & 1;
 466 #endif
 467         }
 468
 469         /*
 470          * Prevent writes to uninitialized FLASH.
 471          */
 472         if (info->flash_id != FLASH_UNKNOWN) {
 473 #if 0                           /* test-only */
 474 #ifdef CONFIG_ADCIOP
 475                 addr2 = (volatile unsigned char *) info->start[0];
 476                 addr2[ADDR0] = 0xAA;
 477                 addr2[ADDR1] = 0x55;
 478                 addr2[ADDR0] = 0xF0;    /* reset bank */
 479 #else
 480                 addr2 = (FLASH_WORD_SIZE *) info->start[0];
 481                 *addr2 = (FLASH_WORD_SIZE) 0x00F000F0;  /* reset bank */
 482 #endif
 483 #else  /* test-only */
 484                 addr2 = (FLASH_WORD_SIZE *) info->start[0];
 485                 *addr2 = (FLASH_WORD_SIZE) 0x00F000F0;  /* reset bank */
 486 #endif /* test-only */
 487         }
 488
 489         return (info->size);
 490 }
 491
 492 int wait_for_DQ7 (flash_info_t * info, int sect)
 493 {
 494         ulong start, now, last;
 495         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[sect]);
 496
 497         start = get_timer (0);
 498         last = 0;
 499         while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) != (FLASH_WORD_SIZE) 0x00800080) {
 500                 if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
 501                         printf ("Timeout\n");
 502                         return -1;
 503                 }
 504                 /* show that we're waiting */
 505                 if ((now - last) > 1000) {      /* every second */
 506                         putc ('.');
 507                         last = now;
 508                 }
 509         }
 510         return 0;
 511 }
 512
 513 /*-----------------------------------------------------------------------
 514  */
 515
 516 int flash_erase (flash_info_t * info, int s_first, int s_last)
 517 {
 518         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
 519         volatile FLASH_WORD_SIZE *addr2;
 520         int flag, prot, sect, l_sect;
 521         int i;
 522
 523         if ((s_first < 0) || (s_first > s_last)) {
 524                 if (info->flash_id == FLASH_UNKNOWN) {
 525                         printf ("- missing\n");
 526                 } else {
 527                         printf ("- no sectors to erase\n");
 528                 }
 529                 return 1;
 530         }
 531
 532         if (info->flash_id == FLASH_UNKNOWN) {
 533                 printf ("Can't erase unknown flash type - aborted\n");
 534                 return 1;
 535         }
 536
 537         prot = 0;
 538         for (sect = s_first; sect <= s_last; ++sect) {
 539                 if (info->protect[sect]) {
 540                         prot++;
 541                 }
 542         }
 543
 544         if (prot) {
 545                 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 546         } else {
 547                 printf ("\n");
 548         }
 549
 550         l_sect = -1;
 551
 552         /* Disable interrupts which might cause a timeout here */
 553         flag = disable_interrupts ();
 554
 555         /* Start erase on unprotected sectors */
 556         for (sect = s_first; sect <= s_last; sect++) {
 557                 if (info->protect[sect] == 0) { /* not protected */
 558                         addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
 559                         printf ("Erasing sector %p\n", addr2);  /* CLH */
 560
 561                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 562                                 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 563                                 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 564                                 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
 565                                 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 566                                 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 567                                 addr2[0] = (FLASH_WORD_SIZE) 0x00500050;        /* block erase */
 568                                 for (i = 0; i < 50; i++)
 569                                         udelay (1000);  /* wait 1 ms */
 570                         } else {
 571                                 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 572                                 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 573                                 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
 574                                 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 575                                 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 576                                 addr2[0] = (FLASH_WORD_SIZE) 0x00300030;        /* sector erase */
 577                         }
 578                         l_sect = sect;
 579                         /*
 580                          * Wait for each sector to complete, it's more
 581                          * reliable.  According to AMD Spec, you must
 582                          * issue all erase commands within a specified
 583                          * timeout.  This has been seen to fail, especially
 584                          * if printf()s are included (for debug)!!
 585                          */
 586                         wait_for_DQ7 (info, sect);
 587                 }
 588         }
 589
 590         /* re-enable interrupts if necessary */
 591         if (flag)
 592                 enable_interrupts ();
 593
 594         /* wait at least 80us - let's wait 1 ms */
 595         udelay (1000);
 596
 597 #if 0
 598         /*
 599          * We wait for the last triggered sector
 600          */
 601         if (l_sect < 0)
 602                 goto DONE;
 603         wait_for_DQ7 (info, l_sect);
 604
 605       DONE:
 606 #endif
 607         /* reset to read mode */
 608         addr = (FLASH_WORD_SIZE *) info->start[0];
 609         addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
 610
 611         printf (" done\n");
 612         return 0;
 613 }
 614
 615 /*-----------------------------------------------------------------------
 616  * Copy memory to flash, returns:
 617  * 0 - OK
 618  * 1 - write timeout
 619  * 2 - Flash not erased
 620  */
 621
 622 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 623 {
 624         ulong cp, wp, data;
 625         int i, l, rc;
 626
 627         wp = (addr & ~3);       /* get lower word aligned address */
 628
 629         /*
 630          * handle unaligned start bytes
 631          */
 632         if ((l = addr - wp) != 0) {
 633                 data = 0;
 634                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 635                         data = (data << 8) | (*(uchar *) cp);
 636                 }
 637                 for (; i < 4 && cnt > 0; ++i) {
 638                         data = (data << 8) | *src++;
 639                         --cnt;
 640                         ++cp;
 641                 }
 642                 for (; cnt == 0 && i < 4; ++i, ++cp) {
 643                         data = (data << 8) | (*(uchar *) cp);
 644                 }
 645
 646                 if ((rc = write_word (info, wp, data)) != 0) {
 647                         return (rc);
 648                 }
 649                 wp += 4;
 650         }
 651
 652         /*
 653          * handle word aligned part
 654          */
 655         while (cnt >= 4) {
 656                 data = 0;
 657                 for (i = 0; i < 4; ++i) {
 658                         data = (data << 8) | *src++;
 659                 }
 660                 if ((rc = write_word (info, wp, data)) != 0) {
 661                         return (rc);
 662                 }
 663                 wp += 4;
 664                 cnt -= 4;
 665         }
 666
 667         if (cnt == 0) {
 668                 return (0);
 669         }
 670
 671         /*
 672          * handle unaligned tail bytes
 673          */
 674         data = 0;
 675         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 676                 data = (data << 8) | *src++;
 677                 --cnt;
 678         }
 679         for (; i < 4; ++i, ++cp) {
 680                 data = (data << 8) | (*(uchar *) cp);
 681         }
 682
 683         return (write_word (info, wp, data));
 684 }
 685
 686 /*-----------------------------------------------------------------------
 687  * Write a word to Flash, returns:
 688  * 0 - OK
 689  * 1 - write timeout
 690  * 2 - Flash not erased
 691  */
 692 static int write_word (flash_info_t * info, ulong dest, ulong data)
 693 {
 694         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) (info->start[0]);
 695         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
 696         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
 697         ulong start;
 698         int i;
 699
 700         /* Check if Flash is (sufficiently) erased */
 701         if ((*((volatile FLASH_WORD_SIZE *) dest) &
 702              (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
 703                 return (2);
 704         }
 705
 706         for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
 707                 int flag;
 708
 709                 /* Disable interrupts which might cause a timeout here */
 710                 flag = disable_interrupts ();
 711
 712                 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
 713                 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
 714                 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
 715
 716                 dest2[i] = data2[i];
 717
 718                 /* re-enable interrupts if necessary */
 719                 if (flag)
 720                         enable_interrupts ();
 721
 722                 /* data polling for D7 */
 723                 start = get_timer (0);
 724                 while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
 725                        (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
 726
 727                         if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 728                                 return (1);
 729                         }
 730                 }
 731         }
 732
 733         return (0);
 734 }
 735
 736 /*-----------------------------------------------------------------------
 737  */