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