git.sur5r.net Git - u-boot/blob - board/tqm8xx/flash.c

   1 /*
   2  * (C) Copyright 2000-2004
   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 #if 0
  25 #define DEBUG
  26 #endif
  27
  28 #include <common.h>
  29 #include <mpc8xx.h>
  30 #include <environment.h>
  31
  32 #include <asm/processor.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 #if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M) \
  37     && !defined(CONFIG_TQM885D)
  38 # ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
  39 #  define CFG_OR_TIMING_FLASH_AT_50MHZ  (OR_ACS_DIV1  | OR_TRLX | OR_CSNT_SAM | \
  40                                          OR_SCY_2_CLK | OR_EHTR | OR_BI)
  41 # endif
  42 #endif /* CONFIG_TQM8xxL/M, !TQM866M, !TQM885D */
  43
  44 #ifndef CFG_ENV_ADDR
  45 #define CFG_ENV_ADDR    (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  46 #endif
  47
  48 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  49
  50 /*-----------------------------------------------------------------------
  51  * Functions
  52  */
  53 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  54 static int write_word (flash_info_t *info, ulong dest, ulong data);
  55
  56 /*-----------------------------------------------------------------------
  57  */
  58
  59 unsigned long flash_init (void)
  60 {
  61         volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
  62         volatile memctl8xx_t *memctl = &immap->im_memctl;
  63         unsigned long size_b0, size_b1;
  64         int i;
  65
  66 #ifdef  CFG_OR_TIMING_FLASH_AT_50MHZ
  67         int scy, trlx, flash_or_timing, clk_diff;
  68
  69         scy = (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_SCY_MSK) >> 4;
  70         if (CFG_OR_TIMING_FLASH_AT_50MHZ & OR_TRLX) {
  71                 trlx = OR_TRLX;
  72                 scy *= 2;
  73         } else
  74                 trlx = 0;
  75
  76                 /* We assume that each 10MHz of bus clock require 1-clk SCY
  77                  * adjustment.
  78                  */
  79         clk_diff = (gd->bus_clk / 1000000) - 50;
  80
  81                 /* We need proper rounding here. This is what the "+5" and "-5"
  82                  * are here for.
  83                  */
  84         if (clk_diff >= 0)
  85                 scy += (clk_diff + 5) / 10;
  86         else
  87                 scy += (clk_diff - 5) / 10;
  88
  89                 /* For bus frequencies above 50MHz, we want to use relaxed timing
  90                  * (OR_TRLX).
  91                  */
  92         if (gd->bus_clk >= 50000000)
  93                 trlx = OR_TRLX;
  94         else
  95                 trlx = 0;
  96
  97         if (trlx)
  98                 scy /= 2;
  99
 100         if (scy > 0xf)
 101                 scy = 0xf;
 102         if (scy < 1)
 103                 scy = 1;
 104
 105         flash_or_timing = (scy << 4) | trlx |
 106                           (CFG_OR_TIMING_FLASH_AT_50MHZ & ~(OR_TRLX | OR_SCY_MSK));
 107 #endif
 108         /* Init: no FLASHes known */
 109         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 110                 flash_info[i].flash_id = FLASH_UNKNOWN;
 111         }
 112
 113         /* Static FLASH Bank configuration here - FIXME XXX */
 114
 115         debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
 116
 117         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
 118
 119         debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);
 120
 121         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 122                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 123                         size_b0, size_b0<<20);
 124         }
 125
 126         size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
 127
 128         debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
 129
 130         if (size_b1 > size_b0) {
 131                 printf ("## ERROR: "
 132                         "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
 133                         size_b1, size_b1<<20,
 134                         size_b0, size_b0<<20
 135                 );
 136                 flash_info[0].flash_id  = FLASH_UNKNOWN;
 137                 flash_info[1].flash_id  = FLASH_UNKNOWN;
 138                 flash_info[0].sector_count      = -1;
 139                 flash_info[1].sector_count      = -1;
 140                 flash_info[0].size              = 0;
 141                 flash_info[1].size              = 0;
 142                 return (0);
 143         }
 144
 145         debug  ("## Before remap: "
 146                 "BR0: 0x%08x    OR0: 0x%08x    "
 147                 "BR1: 0x%08x    OR1: 0x%08x\n",
 148                 memctl->memc_br0, memctl->memc_or0,
 149                 memctl->memc_br1, memctl->memc_or1);
 150
 151         /* Remap FLASH according to real size */
 152 #ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
 153         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
 154 #else
 155         memctl->memc_or0 = flash_or_timing | (-size_b0 & OR_AM_MSK);
 156 #endif
 157         memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
 158
 159         debug ("## BR0: 0x%08x    OR0: 0x%08x\n",
 160                 memctl->memc_br0, memctl->memc_or0);
 161
 162         /* Re-do sizing to get full correct info */
 163         size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
 164
 165 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 166         /* monitor protection ON by default */
 167         debug ("Protect monitor: %08lx ... %08lx\n",
 168                 (ulong)CFG_MONITOR_BASE,
 169                 (ulong)CFG_MONITOR_BASE + monitor_flash_len - 1);
 170
 171         flash_protect(FLAG_PROTECT_SET,
 172                       CFG_MONITOR_BASE,
 173                       CFG_MONITOR_BASE + monitor_flash_len - 1,
 174                       &flash_info[0]);
 175 #endif
 176
 177 #ifdef  CFG_ENV_IS_IN_FLASH
 178         /* ENV protection ON by default */
 179 # ifdef CFG_ENV_ADDR_REDUND
 180         debug ("Protect primary   environment: %08lx ... %08lx\n",
 181                 (ulong)CFG_ENV_ADDR,
 182                 (ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
 183 # else
 184         debug ("Protect environment: %08lx ... %08lx\n",
 185                 (ulong)CFG_ENV_ADDR,
 186                 (ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
 187 # endif
 188
 189         flash_protect(FLAG_PROTECT_SET,
 190                       CFG_ENV_ADDR,
 191                       CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
 192                       &flash_info[0]);
 193 #endif
 194
 195 #ifdef CFG_ENV_ADDR_REDUND
 196         debug ("Protect redundand environment: %08lx ... %08lx\n",
 197                 (ulong)CFG_ENV_ADDR_REDUND,
 198                 (ulong)CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1);
 199
 200         flash_protect(FLAG_PROTECT_SET,
 201                       CFG_ENV_ADDR_REDUND,
 202                       CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
 203                       &flash_info[0]);
 204 #endif
 205
 206         if (size_b1) {
 207 #ifndef CFG_OR_TIMING_FLASH_AT_50MHZ
 208                 memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
 209 #else
 210                 memctl->memc_or1 = flash_or_timing | (-size_b1 & 0xFFFF8000);
 211 #endif
 212                 memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
 213                                     BR_MS_GPCM | BR_V;
 214
 215                 debug ("## BR1: 0x%08x    OR1: 0x%08x\n",
 216                         memctl->memc_br1, memctl->memc_or1);
 217
 218                 /* Re-do sizing to get full correct info */
 219                 size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
 220                                           &flash_info[1]);
 221
 222 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 223                 /* monitor protection ON by default */
 224                 flash_protect(FLAG_PROTECT_SET,
 225                               CFG_MONITOR_BASE,
 226                               CFG_MONITOR_BASE+monitor_flash_len-1,
 227                               &flash_info[1]);
 228 #endif
 229
 230 #ifdef  CFG_ENV_IS_IN_FLASH
 231                 /* ENV protection ON by default */
 232                 flash_protect(FLAG_PROTECT_SET,
 233                               CFG_ENV_ADDR,
 234                               CFG_ENV_ADDR+CFG_ENV_SIZE-1,
 235                               &flash_info[1]);
 236 #endif
 237         } else {
 238                 memctl->memc_br1 = 0;           /* invalidate bank */
 239
 240                 flash_info[1].flash_id = FLASH_UNKNOWN;
 241                 flash_info[1].sector_count = -1;
 242                 flash_info[1].size = 0;
 243
 244                 debug ("## DISABLE BR1: 0x%08x    OR1: 0x%08x\n",
 245                         memctl->memc_br1, memctl->memc_or1);
 246         }
 247
 248         debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
 249
 250         flash_info[0].size = size_b0;
 251         flash_info[1].size = size_b1;
 252
 253         return (size_b0 + size_b1);
 254 }
 255
 256 /*-----------------------------------------------------------------------
 257  */
 258 void flash_print_info  (flash_info_t *info)
 259 {
 260         int i;
 261
 262         if (info->flash_id == FLASH_UNKNOWN) {
 263                 printf ("missing or unknown FLASH type\n");
 264                 return;
 265         }
 266
 267         switch (info->flash_id & FLASH_VENDMASK) {
 268         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 269         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 270         default:                printf ("Unknown Vendor ");     break;
 271         }
 272
 273         switch (info->flash_id & FLASH_TYPEMASK) {
 274 #ifdef CONFIG_TQM8xxM   /* mirror bit flash */
 275         case FLASH_AMLV128U:    printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
 276                                 break;
 277         case FLASH_AMLV320U:    printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
 278                                 break;
 279         case FLASH_AMLV640U:    printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
 280                                 break;
 281         case FLASH_AMLV320B:    printf ("AM29LV320MB (32Mbit, bottom boot sect)\n");
 282                                 break;
 283 # else  /* ! TQM8xxM */
 284         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 285                                 break;
 286         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 287                                 break;
 288         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 289                                 break;
 290         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 291                                 break;
 292         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 293                                 break;
 294         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 295                                 break;
 296 #endif  /* TQM8xxM */
 297         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 298                                 break;
 299         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 300                                 break;
 301         case FLASH_AMDL163B:    printf ("AM29DL163B (16 Mbit, bottom boot sect)\n");
 302                                 break;
 303         default:                printf ("Unknown Chip Type\n");
 304                                 break;
 305         }
 306
 307         printf ("  Size: %ld MB in %d Sectors\n",
 308                 info->size >> 20, info->sector_count);
 309
 310         printf ("  Sector Start Addresses:");
 311         for (i=0; i<info->sector_count; ++i) {
 312                 if ((i % 5) == 0)
 313                         printf ("\n   ");
 314                 printf (" %08lX%s",
 315                         info->start[i],
 316                         info->protect[i] ? " (RO)" : "     "
 317                 );
 318         }
 319         printf ("\n");
 320         return;
 321 }
 322
 323 /*-----------------------------------------------------------------------
 324  */
 325
 326
 327 /*-----------------------------------------------------------------------
 328  */
 329
 330 /*
 331  * The following code cannot be run from FLASH!
 332  */
 333
 334 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 335 {
 336         short i;
 337         ulong value;
 338         ulong base = (ulong)addr;
 339
 340         /* Write auto select command: read Manufacturer ID */
 341         addr[0x0555] = 0x00AA00AA;
 342         addr[0x02AA] = 0x00550055;
 343         addr[0x0555] = 0x00900090;
 344
 345         value = addr[0];
 346
 347         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 348
 349         switch (value) {
 350         case AMD_MANUFACT:
 351                 debug ("Manufacturer: AMD\n");
 352                 info->flash_id = FLASH_MAN_AMD;
 353                 break;
 354         case FUJ_MANUFACT:
 355                 debug ("Manufacturer: FUJITSU\n");
 356                 info->flash_id = FLASH_MAN_FUJ;
 357                 break;
 358         default:
 359                 debug ("Manufacturer: *** unknown ***\n");
 360                 info->flash_id = FLASH_UNKNOWN;
 361                 info->sector_count = 0;
 362                 info->size = 0;
 363                 return (0);                     /* no or unknown flash  */
 364         }
 365
 366         value = addr[1];                        /* device ID            */
 367
 368         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 369
 370         switch (value) {
 371 #ifdef CONFIG_TQM8xxM   /* mirror bit flash */
 372         case AMD_ID_MIRROR:
 373                 debug ("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 374                         addr[14], addr[15]);
 375                 /* Special case for AMLV320MH/L */
 376                 if ((addr[14] & 0x00ff00ff) == 0x001d001d &&
 377                     (addr[15] & 0x00ff00ff) == 0x00000000) {
 378                         debug ("Chip: AMLV320MH/L\n");
 379                         info->flash_id += FLASH_AMLV320U;
 380                         info->sector_count = 64;
 381                         info->size = 0x00800000;        /* => 8 MB */
 382                         break;
 383                 }
 384                 switch(addr[14]) {
 385                 case AMD_ID_LV128U_2:
 386                         if (addr[15] != AMD_ID_LV128U_3) {
 387                                 debug ("Chip: AMLV128U -> unknown\n");
 388                                 info->flash_id = FLASH_UNKNOWN;
 389                         } else {
 390                                 debug ("Chip: AMLV128U\n");
 391                                 info->flash_id += FLASH_AMLV128U;
 392                                 info->sector_count = 256;
 393                                 info->size = 0x02000000;
 394                         }
 395                         break;                          /* => 32 MB     */
 396                 case AMD_ID_LV640U_2:
 397                         if (addr[15] != AMD_ID_LV640U_3) {
 398                                 debug ("Chip: AMLV640U -> unknown\n");
 399                                 info->flash_id = FLASH_UNKNOWN;
 400                         } else {
 401                                 debug ("Chip: AMLV640U\n");
 402                                 info->flash_id += FLASH_AMLV640U;
 403                                 info->sector_count = 128;
 404                                 info->size = 0x01000000;
 405                         }
 406                         break;                          /* => 16 MB     */
 407                 case AMD_ID_LV320B_2:
 408                         if (addr[15] != AMD_ID_LV320B_3) {
 409                                 debug ("Chip: AMLV320B -> unknown\n");
 410                                 info->flash_id = FLASH_UNKNOWN;
 411                         } else {
 412                                 debug ("Chip: AMLV320B\n");
 413                                 info->flash_id += FLASH_AMLV320B;
 414                                 info->sector_count = 71;
 415                                 info->size = 0x00800000;
 416                         }
 417                         break;                          /* =>  8 MB     */
 418                 default:
 419                         debug ("Chip: *** unknown ***\n");
 420                         info->flash_id = FLASH_UNKNOWN;
 421                         break;
 422                 }
 423                 break;
 424 # else  /* ! TQM8xxM */
 425         case AMD_ID_LV400T:
 426                 info->flash_id += FLASH_AM400T;
 427                 info->sector_count = 11;
 428                 info->size = 0x00100000;
 429                 break;                                  /* => 1 MB              */
 430
 431         case AMD_ID_LV400B:
 432                 info->flash_id += FLASH_AM400B;
 433                 info->sector_count = 11;
 434                 info->size = 0x00100000;
 435                 break;                                  /* => 1 MB              */
 436
 437         case AMD_ID_LV800T:
 438                 info->flash_id += FLASH_AM800T;
 439                 info->sector_count = 19;
 440                 info->size = 0x00200000;
 441                 break;                                  /* => 2 MB      */
 442
 443         case AMD_ID_LV800B:
 444                 info->flash_id += FLASH_AM800B;
 445                 info->sector_count = 19;
 446                 info->size = 0x00200000;
 447                 break;                                  /* => 2 MB      */
 448
 449         case AMD_ID_LV320T:
 450                 info->flash_id += FLASH_AM320T;
 451                 info->sector_count = 71;
 452                 info->size = 0x00800000;
 453                 break;                                  /* => 8 MB      */
 454
 455         case AMD_ID_LV320B:
 456                 info->flash_id += FLASH_AM320B;
 457                 info->sector_count = 71;
 458                 info->size = 0x00800000;
 459                 break;                                  /* => 8 MB      */
 460 #endif  /* TQM8xxM */
 461
 462         case AMD_ID_LV160T:
 463                 info->flash_id += FLASH_AM160T;
 464                 info->sector_count = 35;
 465                 info->size = 0x00400000;
 466                 break;                                  /* => 4 MB      */
 467
 468         case AMD_ID_LV160B:
 469                 info->flash_id += FLASH_AM160B;
 470                 info->sector_count = 35;
 471                 info->size = 0x00400000;
 472                 break;                                  /* => 4 MB      */
 473
 474         case AMD_ID_DL163B:
 475                 info->flash_id += FLASH_AMDL163B;
 476                 info->sector_count = 39;
 477                 info->size = 0x00400000;
 478                 break;                                  /* => 4 MB      */
 479
 480         default:
 481                 info->flash_id = FLASH_UNKNOWN;
 482                 return (0);                     /* => no or unknown flash */
 483         }
 484
 485         /* set up sector start address table */
 486         switch (value) {
 487 #ifdef CONFIG_TQM8xxM   /* mirror bit flash */
 488         case AMD_ID_MIRROR:
 489                 switch (info->flash_id & FLASH_TYPEMASK) {
 490                         /* only known types here - no default */
 491                 case FLASH_AMLV128U:
 492                 case FLASH_AMLV640U:
 493                 case FLASH_AMLV320U:
 494                         for (i = 0; i < info->sector_count; i++) {
 495                                 info->start[i] = base;
 496                                 base += 0x20000;
 497                         }
 498                         break;
 499                 case FLASH_AMLV320B:
 500                         for (i = 0; i < info->sector_count; i++) {
 501                                 info->start[i] = base;
 502                                 /*
 503                                  * The first 8 sectors are 8 kB,
 504                                  * all the other ones  are 64 kB
 505                                  */
 506                                 base += (i < 8)
 507                                         ?  2 * ( 8 << 10)
 508                                         :  2 * (64 << 10);
 509                         }
 510                         break;
 511                 }
 512                 break;
 513 # else  /* ! TQM8xxM */
 514         case AMD_ID_LV400B:
 515         case AMD_ID_LV800B:
 516                 /* set sector offsets for bottom boot block type        */
 517                 info->start[0] = base + 0x00000000;
 518                 info->start[1] = base + 0x00008000;
 519                 info->start[2] = base + 0x0000C000;
 520                 info->start[3] = base + 0x00010000;
 521                 for (i = 4; i < info->sector_count; i++) {
 522                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 523                 }
 524                 break;
 525         case AMD_ID_LV400T:
 526         case AMD_ID_LV800T:
 527                 /* set sector offsets for top boot block type           */
 528                 i = info->sector_count - 1;
 529                 info->start[i--] = base + info->size - 0x00008000;
 530                 info->start[i--] = base + info->size - 0x0000C000;
 531                 info->start[i--] = base + info->size - 0x00010000;
 532                 for (; i >= 0; i--) {
 533                         info->start[i] = base + i * 0x00020000;
 534                 }
 535                 break;
 536         case AMD_ID_LV320B:
 537                 for (i = 0; i < info->sector_count; i++) {
 538                         info->start[i] = base;
 539                         /*
 540                          * The first 8 sectors are 8 kB,
 541                          * all the other ones  are 64 kB
 542                          */
 543                         base += (i < 8)
 544                                 ?  2 * ( 8 << 10)
 545                                 :  2 * (64 << 10);
 546                 }
 547                 break;
 548         case AMD_ID_LV320T:
 549                 for (i = 0; i < info->sector_count; i++) {
 550                         info->start[i] = base;
 551                         /*
 552                          * The last 8 sectors are 8 kB,
 553                          * all the other ones  are 64 kB
 554                          */
 555                         base += (i < (info->sector_count - 8))
 556                                 ?  2 * (64 << 10)
 557                                 :  2 * ( 8 << 10);
 558                 }
 559                 break;
 560 #endif  /* TQM8xxM */
 561         case AMD_ID_LV160B:
 562                 /* set sector offsets for bottom boot block type        */
 563                 info->start[0] = base + 0x00000000;
 564                 info->start[1] = base + 0x00008000;
 565                 info->start[2] = base + 0x0000C000;
 566                 info->start[3] = base + 0x00010000;
 567                 for (i = 4; i < info->sector_count; i++) {
 568                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 569                 }
 570                 break;
 571         case AMD_ID_LV160T:
 572                 /* set sector offsets for top boot block type           */
 573                 i = info->sector_count - 1;
 574                 info->start[i--] = base + info->size - 0x00008000;
 575                 info->start[i--] = base + info->size - 0x0000C000;
 576                 info->start[i--] = base + info->size - 0x00010000;
 577                 for (; i >= 0; i--) {
 578                         info->start[i] = base + i * 0x00020000;
 579                 }
 580                 break;
 581         case AMD_ID_DL163B:
 582                 for (i = 0; i < info->sector_count; i++) {
 583                         info->start[i] = base;
 584                         /*
 585                          * The first 8 sectors are 8 kB,
 586                          * all the other ones  are 64 kB
 587                          */
 588                         base += (i < 8)
 589                                 ?  2 * ( 8 << 10)
 590                                 :  2 * (64 << 10);
 591                 }
 592                 break;
 593         default:
 594                 return (0);
 595                 break;
 596         }
 597
 598 #if 0
 599         /* check for protected sectors */
 600         for (i = 0; i < info->sector_count; i++) {
 601                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 602                 /* D0 = 1 if protected */
 603                 addr = (volatile unsigned long *)(info->start[i]);
 604                 info->protect[i] = addr[2] & 1;
 605         }
 606 #endif
 607
 608         /*
 609          * Prevent writes to uninitialized FLASH.
 610          */
 611         if (info->flash_id != FLASH_UNKNOWN) {
 612                 addr = (volatile unsigned long *)info->start[0];
 613
 614                 *addr = 0x00F000F0;     /* reset bank */
 615         }
 616
 617         return (info->size);
 618 }
 619
 620
 621 /*-----------------------------------------------------------------------
 622  */
 623
 624 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 625 {
 626         vu_long *addr = (vu_long*)(info->start[0]);
 627         int flag, prot, sect, l_sect;
 628         ulong start, now, last;
 629
 630         debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
 631
 632         if ((s_first < 0) || (s_first > s_last)) {
 633                 if (info->flash_id == FLASH_UNKNOWN) {
 634                         printf ("- missing\n");
 635                 } else {
 636                         printf ("- no sectors to erase\n");
 637                 }
 638                 return 1;
 639         }
 640
 641         if ((info->flash_id == FLASH_UNKNOWN) ||
 642             (info->flash_id > FLASH_AMD_COMP)) {
 643                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 644                         info->flash_id);
 645                 return 1;
 646         }
 647
 648         prot = 0;
 649         for (sect=s_first; sect<=s_last; ++sect) {
 650                 if (info->protect[sect]) {
 651                         prot++;
 652                 }
 653         }
 654
 655         if (prot) {
 656                 printf ("- Warning: %d protected sectors will not be erased!\n",
 657                         prot);
 658         } else {
 659                 printf ("\n");
 660         }
 661
 662         l_sect = -1;
 663
 664         /* Disable interrupts which might cause a timeout here */
 665         flag = disable_interrupts();
 666
 667         addr[0x0555] = 0x00AA00AA;
 668         addr[0x02AA] = 0x00550055;
 669         addr[0x0555] = 0x00800080;
 670         addr[0x0555] = 0x00AA00AA;
 671         addr[0x02AA] = 0x00550055;
 672
 673         /* Start erase on unprotected sectors */
 674         for (sect = s_first; sect<=s_last; sect++) {
 675                 if (info->protect[sect] == 0) { /* not protected */
 676                         addr = (vu_long*)(info->start[sect]);
 677                         addr[0] = 0x00300030;
 678                         l_sect = sect;
 679                 }
 680         }
 681
 682         /* re-enable interrupts if necessary */
 683         if (flag)
 684                 enable_interrupts();
 685
 686         /* wait at least 80us - let's wait 1 ms */
 687         udelay (1000);
 688
 689         /*
 690          * We wait for the last triggered sector
 691          */
 692         if (l_sect < 0)
 693                 goto DONE;
 694
 695         start = get_timer (0);
 696         last  = start;
 697         addr = (vu_long*)(info->start[l_sect]);
 698         while ((addr[0] & 0x00800080) != 0x00800080) {
 699                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 700                         printf ("Timeout\n");
 701                         return 1;
 702                 }
 703                 /* show that we're waiting */
 704                 if ((now - last) > 1000) {      /* every second */
 705                         putc ('.');
 706                         last = now;
 707                 }
 708         }
 709
 710 DONE:
 711         /* reset to read mode */
 712         addr = (volatile unsigned long *)info->start[0];
 713         addr[0] = 0x00F000F0;   /* reset bank */
 714
 715         printf (" done\n");
 716         return 0;
 717 }
 718
 719 /*-----------------------------------------------------------------------
 720  * Copy memory to flash, returns:
 721  * 0 - OK
 722  * 1 - write timeout
 723  * 2 - Flash not erased
 724  */
 725
 726 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 727 {
 728         ulong cp, wp, data;
 729         int i, l, rc;
 730
 731         wp = (addr & ~3);       /* get lower word aligned address */
 732
 733         /*
 734          * handle unaligned start bytes
 735          */
 736         if ((l = addr - wp) != 0) {
 737                 data = 0;
 738                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 739                         data = (data << 8) | (*(uchar *)cp);
 740                 }
 741                 for (; i<4 && cnt>0; ++i) {
 742                         data = (data << 8) | *src++;
 743                         --cnt;
 744                         ++cp;
 745                 }
 746                 for (; cnt==0 && i<4; ++i, ++cp) {
 747                         data = (data << 8) | (*(uchar *)cp);
 748                 }
 749
 750                 if ((rc = write_word(info, wp, data)) != 0) {
 751                         return (rc);
 752                 }
 753                 wp += 4;
 754         }
 755
 756         /*
 757          * handle word aligned part
 758          */
 759         while (cnt >= 4) {
 760                 data = 0;
 761                 for (i=0; i<4; ++i) {
 762                         data = (data << 8) | *src++;
 763                 }
 764                 if ((rc = write_word(info, wp, data)) != 0) {
 765                         return (rc);
 766                 }
 767                 wp  += 4;
 768                 cnt -= 4;
 769         }
 770
 771         if (cnt == 0) {
 772                 return (0);
 773         }
 774
 775         /*
 776          * handle unaligned tail bytes
 777          */
 778         data = 0;
 779         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 780                 data = (data << 8) | *src++;
 781                 --cnt;
 782         }
 783         for (; i<4; ++i, ++cp) {
 784                 data = (data << 8) | (*(uchar *)cp);
 785         }
 786
 787         return (write_word(info, wp, data));
 788 }
 789
 790 /*-----------------------------------------------------------------------
 791  * Write a word to Flash, returns:
 792  * 0 - OK
 793  * 1 - write timeout
 794  * 2 - Flash not erased
 795  */
 796 static int write_word (flash_info_t *info, ulong dest, ulong data)
 797 {
 798         vu_long *addr = (vu_long*)(info->start[0]);
 799         ulong start;
 800         int flag;
 801
 802         /* Check if Flash is (sufficiently) erased */
 803         if ((*((vu_long *)dest) & data) != data) {
 804                 return (2);
 805         }
 806         /* Disable interrupts which might cause a timeout here */
 807         flag = disable_interrupts();
 808
 809         addr[0x0555] = 0x00AA00AA;
 810         addr[0x02AA] = 0x00550055;
 811         addr[0x0555] = 0x00A000A0;
 812
 813         *((vu_long *)dest) = data;
 814
 815         /* re-enable interrupts if necessary */
 816         if (flag)
 817                 enable_interrupts();
 818
 819         /* data polling for D7 */
 820         start = get_timer (0);
 821         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 822                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 823                         return (1);
 824                 }
 825         }
 826         return (0);
 827 }
 828
 829 /*-----------------------------------------------------------------------
 830  */