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

   1 /*
   2  * (C) Copyright 2001
   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 #include <common.h>
  25 #include <asm/ppc4xx.h>
  26 #include <asm/processor.h>
  27
  28 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  29
  30
  31 #ifdef CONFIG_SYS_FLASH_16BIT
  32 #define FLASH_WORD_SIZE unsigned short
  33 #define FLASH_ID_MASK   0xFFFF
  34 #else
  35 #define FLASH_WORD_SIZE unsigned long
  36 #define FLASH_ID_MASK   0xFFFFFFFF
  37 #endif
  38
  39 /*-----------------------------------------------------------------------
  40  * Functions
  41  */
  42 /* stolen from esteem192e/flash.c */
  43 ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info);
  44
  45 #ifndef CONFIG_SYS_FLASH_16BIT
  46 static int write_word (flash_info_t *info, ulong dest, ulong data);
  47 #else
  48 static int write_short (flash_info_t *info, ulong dest, ushort data);
  49 #endif
  50 static void flash_get_offsets (ulong base, flash_info_t *info);
  51
  52
  53 /*-----------------------------------------------------------------------
  54  */
  55
  56 unsigned long flash_init (void)
  57 {
  58         unsigned long size_b0, size_b1;
  59         int i;
  60         uint pbcr;
  61         unsigned long base_b0, base_b1;
  62
  63         /* Init: no FLASHes known */
  64         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  65                 flash_info[i].flash_id = FLASH_UNKNOWN;
  66         }
  67
  68         /* Static FLASH Bank configuration here - FIXME XXX */
  69
  70         size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)FLASH_BASE0_PRELIM, &flash_info[0]);
  71
  72         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  73                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  74                         size_b0, size_b0<<20);
  75         }
  76
  77         /* Only one bank */
  78         if (CONFIG_SYS_MAX_FLASH_BANKS == 1)
  79           {
  80             /* Setup offsets */
  81             flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
  82
  83             /* Monitor protection ON by default */
  84 #if 0       /* sand: */
  85             (void)flash_protect(FLAG_PROTECT_SET,
  86                                 FLASH_BASE0_PRELIM-monitor_flash_len+size_b0,
  87                                 FLASH_BASE0_PRELIM-1+size_b0,
  88                                 &flash_info[0]);
  89 #else
  90             (void)flash_protect(FLAG_PROTECT_SET,
  91                                 CONFIG_SYS_MONITOR_BASE,
  92                                 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  93                                 &flash_info[0]);
  94 #endif
  95             size_b1 = 0 ;
  96             flash_info[0].size = size_b0;
  97           }
  98
  99         /* 2 banks */
 100         else
 101           {
 102             size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)FLASH_BASE1_PRELIM, &flash_info[1]);
 103
 104             /* Re-do sizing to get full correct info */
 105
 106             if (size_b1)
 107               {
 108                 mtdcr(EBC0_CFGADDR, PB0CR);
 109                 pbcr = mfdcr(EBC0_CFGDATA);
 110                 mtdcr(EBC0_CFGADDR, PB0CR);
 111                 base_b1 = -size_b1;
 112                 pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
 113                 mtdcr(EBC0_CFGDATA, pbcr);
 114                 /*          printf("PB1CR = %x\n", pbcr); */
 115               }
 116
 117             if (size_b0)
 118               {
 119                 mtdcr(EBC0_CFGADDR, PB1CR);
 120                 pbcr = mfdcr(EBC0_CFGDATA);
 121                 mtdcr(EBC0_CFGADDR, PB1CR);
 122                 base_b0 = base_b1 - size_b0;
 123                 pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
 124                 mtdcr(EBC0_CFGDATA, pbcr);
 125                 /*            printf("PB0CR = %x\n", pbcr); */
 126               }
 127
 128             size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]);
 129
 130             flash_get_offsets (base_b0, &flash_info[0]);
 131
 132             /* monitor protection ON by default */
 133 #if 0       /* sand: */
 134             (void)flash_protect(FLAG_PROTECT_SET,
 135                                 FLASH_BASE0_PRELIM-monitor_flash_len+size_b0,
 136                                 FLASH_BASE0_PRELIM-1+size_b0,
 137                                 &flash_info[0]);
 138 #else
 139             (void)flash_protect(FLAG_PROTECT_SET,
 140                                 CONFIG_SYS_MONITOR_BASE,
 141                                 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
 142                                 &flash_info[0]);
 143 #endif
 144
 145             if (size_b1) {
 146               /* Re-do sizing to get full correct info */
 147               size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b1, &flash_info[1]);
 148
 149               flash_get_offsets (base_b1, &flash_info[1]);
 150
 151               /* monitor protection ON by default */
 152               (void)flash_protect(FLAG_PROTECT_SET,
 153                                   base_b1+size_b1-monitor_flash_len,
 154                                   base_b1+size_b1-1,
 155                                   &flash_info[1]);
 156               /* monitor protection OFF by default (one is enough) */
 157               (void)flash_protect(FLAG_PROTECT_CLEAR,
 158                                   base_b0+size_b0-monitor_flash_len,
 159                                   base_b0+size_b0-1,
 160                                   &flash_info[0]);
 161             } else {
 162               flash_info[1].flash_id = FLASH_UNKNOWN;
 163               flash_info[1].sector_count = -1;
 164             }
 165
 166             flash_info[0].size = size_b0;
 167             flash_info[1].size = size_b1;
 168           }/* else 2 banks */
 169         return (size_b0 + size_b1);
 170 }
 171
 172
 173 /*-----------------------------------------------------------------------
 174  */
 175
 176 static void flash_get_offsets (ulong base, flash_info_t *info)
 177 {
 178         int i;
 179
 180         /* set up sector start adress table */
 181         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F320J3A ||
 182             (info->flash_id & FLASH_TYPEMASK) == FLASH_28F640J3A ||
 183             (info->flash_id & FLASH_TYPEMASK) == FLASH_28F128J3A) {
 184             for (i = 0; i < info->sector_count; i++) {
 185                 info->start[i] = base + (i * info->size/info->sector_count);
 186             }
 187         } else if (info->flash_id & FLASH_BTYPE) {
 188              if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
 189
 190 #ifndef CONFIG_SYS_FLASH_16BIT
 191                 /* set sector offsets for bottom boot block type        */
 192                 info->start[0] = base + 0x00000000;
 193                 info->start[1] = base + 0x00004000;
 194                 info->start[2] = base + 0x00008000;
 195                 info->start[3] = base + 0x0000C000;
 196                 info->start[4] = base + 0x00010000;
 197                 info->start[5] = base + 0x00014000;
 198                 info->start[6] = base + 0x00018000;
 199                 info->start[7] = base + 0x0001C000;
 200                 for (i = 8; i < info->sector_count; i++) {
 201                         info->start[i] = base + (i * 0x00020000) - 0x000E0000;
 202                 }
 203                }
 204              else {
 205                 /* set sector offsets for bottom boot block type        */
 206                 info->start[0] = base + 0x00000000;
 207                 info->start[1] = base + 0x00008000;
 208                 info->start[2] = base + 0x0000C000;
 209                 info->start[3] = base + 0x00010000;
 210                 for (i = 4; i < info->sector_count; i++) {
 211                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 212                 }
 213                }
 214 #else
 215                 /* set sector offsets for bottom boot block type        */
 216                 info->start[0] = base + 0x00000000;
 217                 info->start[1] = base + 0x00002000;
 218                 info->start[2] = base + 0x00004000;
 219                 info->start[3] = base + 0x00006000;
 220                 info->start[4] = base + 0x00008000;
 221                 info->start[5] = base + 0x0000A000;
 222                 info->start[6] = base + 0x0000C000;
 223                 info->start[7] = base + 0x0000E000;
 224                 for (i = 8; i < info->sector_count; i++) {
 225                         info->start[i] = base + (i * 0x00010000) - 0x00070000;
 226                 }
 227                }
 228              else {
 229                 /* set sector offsets for bottom boot block type        */
 230                 info->start[0] = base + 0x00000000;
 231                 info->start[1] = base + 0x00004000;
 232                 info->start[2] = base + 0x00006000;
 233                 info->start[3] = base + 0x00008000;
 234                 for (i = 4; i < info->sector_count; i++) {
 235                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 236                 }
 237                }
 238 #endif
 239         } else {
 240                 /* set sector offsets for top boot block type           */
 241                 i = info->sector_count - 1;
 242              if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
 243
 244 #ifndef CONFIG_SYS_FLASH_16BIT
 245                 info->start[i--] = base + info->size - 0x00004000;
 246                 info->start[i--] = base + info->size - 0x00008000;
 247                 info->start[i--] = base + info->size - 0x0000C000;
 248                 info->start[i--] = base + info->size - 0x00010000;
 249                 info->start[i--] = base + info->size - 0x00014000;
 250                 info->start[i--] = base + info->size - 0x00018000;
 251                 info->start[i--] = base + info->size - 0x0001C000;
 252                 for (; i >= 0; i--) {
 253                         info->start[i] = base + i * 0x00020000;
 254                 }
 255
 256                } else {
 257
 258                 info->start[i--] = base + info->size - 0x00008000;
 259                 info->start[i--] = base + info->size - 0x0000C000;
 260                 info->start[i--] = base + info->size - 0x00010000;
 261                 for (; i >= 0; i--) {
 262                         info->start[i] = base + i * 0x00020000;
 263                 }
 264                }
 265 #else
 266                 info->start[i--] = base + info->size - 0x00002000;
 267                 info->start[i--] = base + info->size - 0x00004000;
 268                 info->start[i--] = base + info->size - 0x00006000;
 269                 info->start[i--] = base + info->size - 0x00008000;
 270                 info->start[i--] = base + info->size - 0x0000A000;
 271                 info->start[i--] = base + info->size - 0x0000C000;
 272                 info->start[i--] = base + info->size - 0x0000E000;
 273                 for (; i >= 0; i--) {
 274                         info->start[i] = base + i * 0x00010000;
 275                 }
 276
 277                } else {
 278
 279                 info->start[i--] = base + info->size - 0x00004000;
 280                 info->start[i--] = base + info->size - 0x00006000;
 281                 info->start[i--] = base + info->size - 0x00008000;
 282                 for (; i >= 0; i--) {
 283                         info->start[i] = base + i * 0x00010000;
 284                 }
 285                }
 286 #endif
 287         }
 288
 289
 290 }
 291
 292 /*-----------------------------------------------------------------------
 293  */
 294
 295 void flash_print_info  (flash_info_t *info)
 296 {
 297         int i;
 298         uchar *boottype;
 299         uchar botboot[]=", bottom boot sect)\n";
 300         uchar topboot[]=", top boot sector)\n";
 301
 302         if (info->flash_id == FLASH_UNKNOWN) {
 303                 printf ("missing or unknown FLASH type\n");
 304                 return;
 305         }
 306
 307         switch (info->flash_id & FLASH_VENDMASK) {
 308         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 309         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 310         case FLASH_MAN_SST:     printf ("SST ");                break;
 311         case FLASH_MAN_STM:     printf ("STM ");                break;
 312         case FLASH_MAN_INTEL:   printf ("INTEL ");              break;
 313         default:                printf ("Unknown Vendor ");     break;
 314         }
 315
 316         if (info->flash_id & 0x0001 ) {
 317         boottype = botboot;
 318         } else {
 319         boottype = topboot;
 320         }
 321
 322         switch (info->flash_id & FLASH_TYPEMASK) {
 323         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit%s",boottype);
 324                                 break;
 325         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit%s",boottype);
 326                                 break;
 327         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit%s",boottype);
 328                                 break;
 329         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit%s",boottype);
 330                                 break;
 331         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit%s",boottype);
 332                                 break;
 333         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit%s",boottype);
 334                                 break;
 335         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit%s",boottype);
 336                                 break;
 337         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit%s",boottype);
 338                                 break;
 339         case FLASH_INTEL800B:   printf ("INTEL28F800B (8 Mbit%s",boottype);
 340                                 break;
 341         case FLASH_INTEL800T:   printf ("INTEL28F800T (8 Mbit%s",boottype);
 342                                 break;
 343         case FLASH_INTEL160B:   printf ("INTEL28F160B (16 Mbit%s",boottype);
 344                                 break;
 345         case FLASH_INTEL160T:   printf ("INTEL28F160T (16 Mbit%s",boottype);
 346                                 break;
 347         case FLASH_INTEL320B:   printf ("INTEL28F320B (32 Mbit%s",boottype);
 348                                 break;
 349         case FLASH_INTEL320T:   printf ("INTEL28F320T (32 Mbit%s",boottype);
 350                                 break;
 351
 352 #if 0 /* enable when devices are available */
 353
 354         case FLASH_INTEL640B:   printf ("INTEL28F640B (64 Mbit%s",boottype);
 355                                 break;
 356         case FLASH_INTEL640T:   printf ("INTEL28F640T (64 Mbit%s",boottype);
 357                                 break;
 358 #endif
 359         case FLASH_28F320J3A:   printf ("INTEL28F320J3A (32 Mbit%s",boottype);
 360                                 break;
 361         case FLASH_28F640J3A:   printf ("INTEL28F640J3A (64 Mbit%s",boottype);
 362                                 break;
 363         case FLASH_28F128J3A:   printf ("INTEL28F128J3A (128 Mbit%s",boottype);
 364                                 break;
 365
 366         default:                printf ("Unknown Chip Type\n");
 367                                 break;
 368         }
 369
 370         printf ("  Size: %ld MB in %d Sectors\n",
 371                 info->size >> 20, info->sector_count);
 372
 373         printf ("  Sector Start Addresses:");
 374         for (i=0; i<info->sector_count; ++i) {
 375                 if ((i % 5) == 0)
 376                         printf ("\n   ");
 377                 printf (" %08lX%s",
 378                         info->start[i],
 379                         info->protect[i] ? " (RO)" : "     "
 380                 );
 381         }
 382         printf ("\n");
 383         return;
 384 }
 385
 386
 387 /*-----------------------------------------------------------------------
 388  */
 389
 390
 391 /*-----------------------------------------------------------------------
 392  */
 393
 394 /*
 395  * The following code cannot be run from FLASH!
 396  */
 397 ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
 398 {
 399         short i;
 400         ulong base = (ulong)addr;
 401         FLASH_WORD_SIZE value;
 402
 403         /* Write auto select command: read Manufacturer ID */
 404
 405
 406 #ifndef CONFIG_SYS_FLASH_16BIT
 407
 408         /*
 409          * Note: if it is an AMD flash and the word at addr[0000]
 410          * is 0x00890089 this routine will think it is an Intel
 411          * flash device and may(most likely) cause trouble.
 412          */
 413
 414         addr[0x0000] = 0x00900090;
 415         if(addr[0x0000] != 0x00890089){
 416                 addr[0x0555] = 0x00AA00AA;
 417                 addr[0x02AA] = 0x00550055;
 418                 addr[0x0555] = 0x00900090;
 419 #else
 420
 421         /*
 422          * Note: if it is an AMD flash and the word at addr[0000]
 423          * is 0x0089 this routine will think it is an Intel
 424          * flash device and may(most likely) cause trouble.
 425          */
 426
 427         addr[0x0000] = 0x0090;
 428
 429         if(addr[0x0000] != 0x0089){
 430                 addr[0x0555] = 0x00AA;
 431                 addr[0x02AA] = 0x0055;
 432                 addr[0x0555] = 0x0090;
 433 #endif
 434         }
 435         value = addr[0];
 436
 437         switch (value) {
 438         case (AMD_MANUFACT & FLASH_ID_MASK):
 439                 info->flash_id = FLASH_MAN_AMD;
 440                 break;
 441         case (FUJ_MANUFACT & FLASH_ID_MASK):
 442                 info->flash_id = FLASH_MAN_FUJ;
 443                 break;
 444         case (STM_MANUFACT & FLASH_ID_MASK):
 445                 info->flash_id = FLASH_MAN_STM;
 446                 break;
 447         case (SST_MANUFACT & FLASH_ID_MASK):
 448                 info->flash_id = FLASH_MAN_SST;
 449                 break;
 450         case (INTEL_MANUFACT & FLASH_ID_MASK):
 451                 info->flash_id = FLASH_MAN_INTEL;
 452                 break;
 453         default:
 454                 info->flash_id = FLASH_UNKNOWN;
 455                 info->sector_count = 0;
 456                 info->size = 0;
 457                 return (0);                     /* no or unknown flash  */
 458
 459         }
 460
 461         value = addr[1];                        /* device ID            */
 462
 463         switch (value) {
 464
 465         case (AMD_ID_LV400T & FLASH_ID_MASK):
 466                 info->flash_id += FLASH_AM400T;
 467                 info->sector_count = 11;
 468                 info->size = 0x00100000;
 469                 break;                          /* => 1 MB              */
 470
 471         case (AMD_ID_LV400B & FLASH_ID_MASK):
 472                 info->flash_id += FLASH_AM400B;
 473                 info->sector_count = 11;
 474                 info->size = 0x00100000;
 475                 break;                          /* => 1 MB              */
 476
 477         case (AMD_ID_LV800T & FLASH_ID_MASK):
 478                 info->flash_id += FLASH_AM800T;
 479                 info->sector_count = 19;
 480                 info->size = 0x00200000;
 481                 break;                          /* => 2 MB              */
 482
 483         case (AMD_ID_LV800B & FLASH_ID_MASK):
 484                 info->flash_id += FLASH_AM800B;
 485                 info->sector_count = 19;
 486                 info->size = 0x00200000;
 487                 break;                          /* => 2 MB              */
 488
 489         case (AMD_ID_LV160T & FLASH_ID_MASK):
 490                 info->flash_id += FLASH_AM160T;
 491                 info->sector_count = 35;
 492                 info->size = 0x00400000;
 493                 break;                          /* => 4 MB              */
 494
 495         case (AMD_ID_LV160B & FLASH_ID_MASK):
 496                 info->flash_id += FLASH_AM160B;
 497                 info->sector_count = 35;
 498                 info->size = 0x00400000;
 499                 break;                          /* => 4 MB              */
 500 #if 0   /* enable when device IDs are available */
 501         case (AMD_ID_LV320T & FLASH_ID_MASK):
 502                 info->flash_id += FLASH_AM320T;
 503                 info->sector_count = 67;
 504                 info->size = 0x00800000;
 505                 break;                          /* => 8 MB              */
 506
 507         case (AMD_ID_LV320B & FLASH_ID_MASK):
 508                 info->flash_id += FLASH_AM320B;
 509                 info->sector_count = 67;
 510                 info->size = 0x00800000;
 511                 break;                          /* => 8 MB              */
 512 #endif
 513
 514         case (INTEL_ID_28F800B3T & FLASH_ID_MASK):
 515                 info->flash_id += FLASH_INTEL800T;
 516                 info->sector_count = 23;
 517                 info->size = 0x00200000;
 518                 break;                          /* => 2 MB              */
 519
 520         case (INTEL_ID_28F800B3B & FLASH_ID_MASK):
 521                 info->flash_id += FLASH_INTEL800B;
 522                 info->sector_count = 23;
 523                 info->size = 0x00200000;
 524                 break;                          /* => 2 MB              */
 525
 526         case (INTEL_ID_28F160B3T & FLASH_ID_MASK):
 527                 info->flash_id += FLASH_INTEL160T;
 528                 info->sector_count = 39;
 529                 info->size = 0x00400000;
 530                 break;                          /* => 4 MB              */
 531
 532         case (INTEL_ID_28F160B3B & FLASH_ID_MASK):
 533                 info->flash_id += FLASH_INTEL160B;
 534                 info->sector_count = 39;
 535                 info->size = 0x00400000;
 536                 break;                          /* => 4 MB              */
 537
 538         case (INTEL_ID_28F320B3T & FLASH_ID_MASK):
 539                 info->flash_id += FLASH_INTEL320T;
 540                 info->sector_count = 71;
 541                 info->size = 0x00800000;
 542                 break;                          /* => 8 MB              */
 543
 544         case (INTEL_ID_28F320B3B & FLASH_ID_MASK):
 545                 info->flash_id += FLASH_AM320B;
 546                 info->sector_count = 71;
 547                 info->size = 0x00800000;
 548                 break;                          /* => 8 MB              */
 549
 550 #if 0 /* enable when devices are available */
 551         case (INTEL_ID_28F320B3T & FLASH_ID_MASK):
 552                 info->flash_id += FLASH_INTEL320T;
 553                 info->sector_count = 135;
 554                 info->size = 0x01000000;
 555                 break;                          /* => 16 MB             */
 556
 557         case (INTEL_ID_28F320B3B & FLASH_ID_MASK):
 558                 info->flash_id += FLASH_AM320B;
 559                 info->sector_count = 135;
 560                 info->size = 0x01000000;
 561                 break;                          /* => 16 MB             */
 562 #endif
 563         case (INTEL_ID_28F320J3A & FLASH_ID_MASK):
 564                 info->flash_id += FLASH_28F320J3A;
 565                 info->sector_count = 32;
 566                 info->size = 0x00400000;
 567                 break;                          /* => 32 MBit   */
 568         case (INTEL_ID_28F640J3A & FLASH_ID_MASK):
 569                 info->flash_id += FLASH_28F640J3A;
 570                 info->sector_count = 64;
 571                 info->size = 0x00800000;
 572                 break;                          /* => 64 MBit   */
 573         case (INTEL_ID_28F128J3A & FLASH_ID_MASK):
 574                 info->flash_id += FLASH_28F128J3A;
 575                 info->sector_count = 128;
 576                 info->size = 0x01000000;
 577                 break;                          /* => 128 MBit  */
 578
 579         default:
 580                 /* FIXME*/
 581                 info->flash_id = FLASH_UNKNOWN;
 582                 return (0);                     /* => no or unknown flash */
 583         }
 584
 585         flash_get_offsets(base, info);
 586
 587         /* check for protected sectors */
 588         for (i = 0; i < info->sector_count; i++) {
 589                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 590                 /* D0 = 1 if protected */
 591                 addr = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 592                 info->protect[i] = addr[2] & 1;
 593         }
 594
 595         /*
 596          * Prevent writes to uninitialized FLASH.
 597          */
 598         if (info->flash_id != FLASH_UNKNOWN) {
 599                 addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 600                 if( (info->flash_id & 0xFF00) == FLASH_MAN_INTEL){
 601                    *addr = (0x00F000F0 & FLASH_ID_MASK);        /* reset bank */
 602                 } else {
 603                    *addr = (0x00FF00FF & FLASH_ID_MASK);        /* reset bank */
 604                 }
 605         }
 606
 607         return (info->size);
 608 }
 609
 610
 611 /*-----------------------------------------------------------------------
 612  */
 613
 614 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 615 {
 616
 617         volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]);
 618         int flag, prot, sect, l_sect, barf;
 619         ulong start, now, last;
 620         int rcode = 0;
 621
 622         if ((s_first < 0) || (s_first > s_last)) {
 623                 if (info->flash_id == FLASH_UNKNOWN) {
 624                         printf ("- missing\n");
 625                 } else {
 626                         printf ("- no sectors to erase\n");
 627                 }
 628                 return 1;
 629         }
 630
 631         if ((info->flash_id == FLASH_UNKNOWN) ||
 632             ((info->flash_id > FLASH_AMD_COMP) &&
 633              ( (info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL ) ) ){
 634                 printf ("Can't erase unknown flash type - aborted\n");
 635                 return 1;
 636         }
 637
 638         prot = 0;
 639         for (sect=s_first; sect<=s_last; ++sect) {
 640                 if (info->protect[sect]) {
 641                         prot++;
 642                 }
 643         }
 644
 645         if (prot) {
 646                 printf ("- Warning: %d protected sectors will not be erased!\n",
 647                         prot);
 648         } else {
 649                 printf ("\n");
 650         }
 651
 652         l_sect = -1;
 653
 654         /* Disable interrupts which might cause a timeout here */
 655         flag = disable_interrupts();
 656     if(info->flash_id < FLASH_AMD_COMP) {
 657 #ifndef CONFIG_SYS_FLASH_16BIT
 658         addr[0x0555] = 0x00AA00AA;
 659         addr[0x02AA] = 0x00550055;
 660         addr[0x0555] = 0x00800080;
 661         addr[0x0555] = 0x00AA00AA;
 662         addr[0x02AA] = 0x00550055;
 663 #else
 664         addr[0x0555] = 0x00AA;
 665         addr[0x02AA] = 0x0055;
 666         addr[0x0555] = 0x0080;
 667         addr[0x0555] = 0x00AA;
 668         addr[0x02AA] = 0x0055;
 669 #endif
 670         /* Start erase on unprotected sectors */
 671         for (sect = s_first; sect<=s_last; sect++) {
 672                 if (info->protect[sect] == 0) { /* not protected */
 673                         addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
 674                         addr[0] = (0x00300030 & FLASH_ID_MASK);
 675                         l_sect = sect;
 676                 }
 677         }
 678
 679         /* re-enable interrupts if necessary */
 680         if (flag)
 681                 enable_interrupts();
 682
 683         /* wait at least 80us - let's wait 1 ms */
 684         udelay (1000);
 685
 686         /*
 687          * We wait for the last triggered sector
 688          */
 689         if (l_sect < 0)
 690                 goto DONE;
 691
 692         start = get_timer (0);
 693         last  = start;
 694         addr = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]);
 695         while ((addr[0] & (0x00800080&FLASH_ID_MASK)) !=
 696                           (0x00800080&FLASH_ID_MASK)  )
 697         {
 698                 if ((now = get_timer(start)) > CONFIG_SYS_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                         serial_putc ('.');
 705                         last = now;
 706                 }
 707         }
 708
 709 DONE:
 710         /* reset to read mode */
 711         addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 712         addr[0] = (0x00F000F0 & FLASH_ID_MASK); /* reset bank */
 713     } else {
 714
 715
 716         for (sect = s_first; sect<=s_last; sect++) {
 717                 if (info->protect[sect] == 0) { /* not protected */
 718                         barf = 0;
 719 #ifndef CONFIG_SYS_FLASH_16BIT
 720                         addr = (vu_long*)(info->start[sect]);
 721                         addr[0] = 0x00200020;
 722                         addr[0] = 0x00D000D0;
 723                         while(!(addr[0] & 0x00800080)); /* wait for error or finish */
 724                         if( addr[0] & 0x003A003A) {     /* check for error */
 725                                 barf = addr[0] & 0x003A0000;
 726                                 if( barf ) {
 727                                         barf >>=16;
 728                                 } else {
 729                                         barf = addr[0] & 0x0000003A;
 730                                 }
 731                         }
 732 #else
 733                         addr = (vu_short*)(info->start[sect]);
 734                         addr[0] = 0x0020;
 735                         addr[0] = 0x00D0;
 736                         while(!(addr[0] & 0x0080));     /* wait for error or finish */
 737                         if( addr[0] & 0x003A)   /* check for error */
 738                                 barf = addr[0] & 0x003A;
 739 #endif
 740                         if(barf) {
 741                                 printf("\nFlash error in sector at %lx\n",(unsigned long)addr);
 742                                 if(barf & 0x0002) printf("Block locked, not erased.\n");
 743                                 if((barf & 0x0030) == 0x0030)
 744                                         printf("Command Sequence error.\n");
 745                                 if((barf & 0x0030) == 0x0020)
 746                                         printf("Block Erase error.\n");
 747                                 if(barf & 0x0008) printf("Vpp Low error.\n");
 748                                 rcode = 1;
 749                         } else printf(".");
 750                         l_sect = sect;
 751                 }
 752         addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 753         addr[0] = (0x00FF00FF & FLASH_ID_MASK); /* reset bank */
 754
 755         }
 756
 757     }
 758         printf (" done\n");
 759         return rcode;
 760 }
 761
 762 /*-----------------------------------------------------------------------
 763  */
 764
 765 /*flash_info_t *addr2info (ulong addr)
 766 {
 767         flash_info_t *info;
 768         int i;
 769
 770         for (i=0, info=&flash_info[0]; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i, ++info) {
 771                 if ((addr >= info->start[0]) &&
 772                     (addr < (info->start[0] + info->size)) ) {
 773                         return (info);
 774                 }
 775         }
 776
 777         return (NULL);
 778 }
 779 */
 780 /*-----------------------------------------------------------------------
 781  * Copy memory to flash.
 782  * Make sure all target addresses are within Flash bounds,
 783  * and no protected sectors are hit.
 784  * Returns:
 785  * 0 - OK
 786  * 1 - write timeout
 787  * 2 - Flash not erased
 788  * 4 - target range includes protected sectors
 789  * 8 - target address not in Flash memory
 790  */
 791
 792 /*int flash_write (uchar *src, ulong addr, ulong cnt)
 793 {
 794         int i;
 795         ulong         end        = addr + cnt - 1;
 796         flash_info_t *info_first = addr2info (addr);
 797         flash_info_t *info_last  = addr2info (end );
 798         flash_info_t *info;
 799
 800         if (cnt == 0) {
 801                 return (0);
 802         }
 803
 804         if (!info_first || !info_last) {
 805                 return (8);
 806         }
 807
 808         for (info = info_first; info <= info_last; ++info) {
 809                 ulong b_end = info->start[0] + info->size;*/    /* bank end addr */
 810 /*              short s_end = info->sector_count - 1;
 811                 for (i=0; i<info->sector_count; ++i) {
 812                         ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
 813
 814                         if ((end >= info->start[i]) && (addr < e_addr) &&
 815                             (info->protect[i] != 0) ) {
 816                                 return (4);
 817                         }
 818                 }
 819         }
 820
 821 */      /* finally write data to flash */
 822 /*      for (info = info_first; info <= info_last && cnt>0; ++info) {
 823                 ulong len;
 824
 825                 len = info->start[0] + info->size - addr;
 826                 if (len > cnt)
 827                         len = cnt;
 828                 if ((i = write_buff(info, src, addr, len)) != 0) {
 829                         return (i);
 830                 }
 831                 cnt  -= len;
 832                 addr += len;
 833                 src  += len;
 834         }
 835         return (0);
 836 }
 837 */
 838 /*-----------------------------------------------------------------------
 839  * Copy memory to flash, returns:
 840  * 0 - OK
 841  * 1 - write timeout
 842  * 2 - Flash not erased
 843  */
 844
 845 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 846 {
 847 #ifndef CONFIG_SYS_FLASH_16BIT
 848         ulong cp, wp, data;
 849         int l;
 850 #else
 851         ulong cp, wp;
 852         ushort data;
 853 #endif
 854         int i, rc;
 855
 856 #ifndef CONFIG_SYS_FLASH_16BIT
 857
 858
 859         wp = (addr & ~3);       /* get lower word aligned address */
 860
 861         /*
 862          * handle unaligned start bytes
 863          */
 864         if ((l = addr - wp) != 0) {
 865                 data = 0;
 866                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 867                         data = (data << 8) | (*(uchar *)cp);
 868                 }
 869                 for (; i<4 && cnt>0; ++i) {
 870                         data = (data << 8) | *src++;
 871                         --cnt;
 872                         ++cp;
 873                 }
 874                 for (; cnt==0 && i<4; ++i, ++cp) {
 875                         data = (data << 8) | (*(uchar *)cp);
 876                 }
 877
 878                 if ((rc = write_word(info, wp, data)) != 0) {
 879                         return (rc);
 880                 }
 881                 wp += 4;
 882         }
 883
 884         /*
 885          * handle word aligned part
 886          */
 887         while (cnt >= 4) {
 888                 data = 0;
 889                 for (i=0; i<4; ++i) {
 890                         data = (data << 8) | *src++;
 891                 }
 892                 if ((rc = write_word(info, wp, data)) != 0) {
 893                         return (rc);
 894                 }
 895                 wp  += 4;
 896                 cnt -= 4;
 897         }
 898
 899         if (cnt == 0) {
 900                 return (0);
 901         }
 902
 903         /*
 904          * handle unaligned tail bytes
 905          */
 906         data = 0;
 907         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 908                 data = (data << 8) | *src++;
 909                 --cnt;
 910         }
 911         for (; i<4; ++i, ++cp) {
 912                 data = (data << 8) | (*(uchar *)cp);
 913         }
 914
 915         return (write_word(info, wp, data));
 916
 917 #else
 918         wp = (addr & ~1);       /* get lower word aligned address */
 919
 920         /*
 921          * handle unaligned start byte
 922          */
 923         if (addr - wp) {
 924                 data = 0;
 925                 data = (data << 8) | *src++;
 926                 --cnt;
 927                 if ((rc = write_short(info, wp, data)) != 0) {
 928                         return (rc);
 929                 }
 930                 wp += 2;
 931         }
 932
 933         /*
 934          * handle word aligned part
 935          */
 936 /*      l = 0; used for debuging  */
 937         while (cnt >= 2) {
 938                 data = 0;
 939                 for (i=0; i<2; ++i) {
 940                         data = (data << 8) | *src++;
 941                 }
 942
 943 /*              if(!l){
 944                         printf("%x",data);
 945                         l = 1;
 946                 }  used for debuging */
 947
 948                 if ((rc = write_short(info, wp, data)) != 0) {
 949                         return (rc);
 950                 }
 951                 wp  += 2;
 952                 cnt -= 2;
 953         }
 954
 955         if (cnt == 0) {
 956                 return (0);
 957         }
 958
 959         /*
 960          * handle unaligned tail bytes
 961          */
 962         data = 0;
 963         for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
 964                 data = (data << 8) | *src++;
 965                 --cnt;
 966         }
 967         for (; i<2; ++i, ++cp) {
 968                 data = (data << 8) | (*(uchar *)cp);
 969         }
 970
 971         return (write_short(info, wp, data));
 972
 973
 974 #endif
 975 }
 976
 977 /*-----------------------------------------------------------------------
 978  * Write a word to Flash, returns:
 979  * 0 - OK
 980  * 1 - write timeout
 981  * 2 - Flash not erased
 982  */
 983 #ifndef CONFIG_SYS_FLASH_16BIT
 984 static int write_word (flash_info_t * info, ulong dest, ulong data)
 985 {
 986         vu_long *addr = (vu_long *) (info->start[0]);
 987         ulong start, barf;
 988         int flag;
 989
 990
 991         /* Check if Flash is (sufficiently) erased */
 992         if ((*((vu_long *) dest) & data) != data) {
 993                 return (2);
 994         }
 995
 996         /* Disable interrupts which might cause a timeout here */
 997         flag = disable_interrupts ();
 998
 999         if (info->flash_id > FLASH_AMD_COMP) {
1000                 /* AMD stuff */
1001                 addr[0x0555] = 0x00AA00AA;
1002                 addr[0x02AA] = 0x00550055;
1003                 addr[0x0555] = 0x00A000A0;
1004         } else {
1005                 /* intel stuff */
1006                 *addr = 0x00400040;
1007         }
1008         *((vu_long *) dest) = data;
1009
1010         /* re-enable interrupts if necessary */
1011         if (flag)
1012                 enable_interrupts ();
1013
1014         /* data polling for D7 */
1015         start = get_timer (0);
1016
1017         if (info->flash_id > FLASH_AMD_COMP) {
1018
1019                 while ((*((vu_long *) dest) & 0x00800080) !=
1020                        (data & 0x00800080)) {
1021                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
1022                                 return (1);
1023                         }
1024                 }
1025
1026         } else {
1027
1028                 while (!(addr[0] & 0x00800080)) {       /* wait for error or finish */
1029                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
1030                                 return (1);
1031                         }
1032
1033                         if (addr[0] & 0x003A003A) {     /* check for error */
1034                                 barf = addr[0] & 0x003A0000;
1035                                 if (barf) {
1036                                         barf >>= 16;
1037                                 } else {
1038                                         barf = addr[0] & 0x0000003A;
1039                                 }
1040                                 printf ("\nFlash write error at address %lx\n",
1041                                         (unsigned long) dest);
1042                                 if (barf & 0x0002)
1043                                         printf ("Block locked, not erased.\n");
1044                                 if (barf & 0x0010)
1045                                         printf ("Programming error.\n");
1046                                 if (barf & 0x0008)
1047                                         printf ("Vpp Low error.\n");
1048                                 return (2);
1049                         }
1050
1051
1052                 }
1053
1054                 return (0);
1055
1056         }
1057
1058 #else
1059
1060 static int write_short (flash_info_t * info, ulong dest, ushort data)
1061 {
1062         vu_short *addr = (vu_short *) (info->start[0]);
1063         ulong start, barf;
1064         int flag;
1065
1066         /* Check if Flash is (sufficiently) erased */
1067         if ((*((vu_short *) dest) & data) != data) {
1068                 return (2);
1069         }
1070
1071         /* Disable interrupts which might cause a timeout here */
1072         flag = disable_interrupts ();
1073
1074         if (info->flash_id < FLASH_AMD_COMP) {
1075                 /* AMD stuff */
1076                 addr[0x0555] = 0x00AA;
1077                 addr[0x02AA] = 0x0055;
1078                 addr[0x0555] = 0x00A0;
1079         } else {
1080                 /* intel stuff */
1081                 *addr = 0x00D0;
1082                 *addr = 0x0040;
1083         }
1084         *((vu_short *) dest) = data;
1085
1086         /* re-enable interrupts if necessary */
1087         if (flag)
1088                 enable_interrupts ();
1089
1090         /* data polling for D7 */
1091         start = get_timer (0);
1092
1093         if (info->flash_id < FLASH_AMD_COMP) {
1094                 /* AMD stuff */
1095                 while ((*((vu_short *) dest) & 0x0080) != (data & 0x0080)) {
1096                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
1097                                 return (1);
1098                         }
1099                 }
1100
1101         } else {
1102                 /* intel stuff */
1103                 while (!(addr[0] & 0x0080)) {   /* wait for error or finish */
1104                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT)
1105                                 return (1);
1106                 }
1107
1108                 if (addr[0] & 0x003A) { /* check for error */
1109                         barf = addr[0] & 0x003A;
1110                         printf ("\nFlash write error at address %lx\n",
1111                                 (unsigned long) dest);
1112                         if (barf & 0x0002)
1113                                 printf ("Block locked, not erased.\n");
1114                         if (barf & 0x0010)
1115                                 printf ("Programming error.\n");
1116                         if (barf & 0x0008)
1117                                 printf ("Vpp Low error.\n");
1118                         return (2);
1119                 }
1120                 *addr = 0x00B0;
1121                 *addr = 0x0070;
1122                 while (!(addr[0] & 0x0080)) {   /* wait for error or finish */
1123                         if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT)
1124                                 return (1);
1125                 }
1126                 *addr = 0x00FF;
1127         }
1128         return (0);
1129 }
1130 #endif
1131 /*-----------------------------------------------------------------------*/