board/evb64260/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * flash.c - flash support for the 512k, 8bit boot flash on the GEVB
  26  *           most of this file was based on the existing U-Boot
  27  *           flash drivers.
  28  */
  29
  30 #include <common.h>
  31 #include <mpc8xx.h>
  32 #include <galileo/gt64260R.h>
  33 #include <galileo/memory.h>
  34 #include "intel_flash.h"
  35
  36 #define FLASH_ROM       0xFFFD       /* unknown flash type                   */
  37 #define FLASH_RAM       0xFFFE       /* unknown flash type                   */
  38 #define FLASH_MAN_UNKNOWN 0xFFFF0000
  39
  40 /* #define DEBUG */
  41 /* #define FLASH_ID_OVERRIDE */ /* Hack to set type to 040B if ROM emulator is installed.
  42                                  * Can be used to program a ROM in circuit if a programmer
  43                                  * is not available by swapping the rom out. */
  44
  45 /* Intel flash commands */
  46 int flash_erase_intel(flash_info_t *info, int s_first, int s_last);
  47 int write_word_intel(bank_addr_t addr, bank_word_t value);
  48
  49 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
  50
  51 /*-----------------------------------------------------------------------
  52  * Functions
  53  */
  54 static ulong flash_get_size (int portwidth, vu_long *addr, flash_info_t *info);
  55 static int write_word (flash_info_t *info, ulong dest, ulong data);
  56 static void flash_get_offsets (ulong base, flash_info_t *info);
  57 static flash_info_t *flash_get_info(ulong base);
  58
  59 /*-----------------------------------------------------------------------
  60  */
  61
  62 unsigned long
  63 flash_init (void)
  64 {
  65         unsigned int i;
  66         unsigned long size_b0 = 0, size_b1 = 0;
  67         unsigned long base, flash_size;
  68
  69         /* Init: no FLASHes known */
  70         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  71                 flash_info[i].flash_id = FLASH_UNKNOWN;
  72         }
  73
  74         /* the boot flash */
  75         base = CFG_FLASH_BASE;
  76 #ifndef CFG_BOOT_FLASH_WIDTH
  77 #define CFG_BOOT_FLASH_WIDTH    1
  78 #endif
  79         size_b0 = flash_get_size(CFG_BOOT_FLASH_WIDTH, (vu_long *)base,
  80                                  &flash_info[0]);
  81
  82 #ifndef CONFIG_P3G4
  83         printf("[");
  84         print_size (size_b0, "");
  85         printf("@%08lX] ", base);
  86 #endif
  87
  88         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  89                 printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n",
  90                         base, size_b0, size_b0<<20);
  91         }
  92
  93         base = memoryGetDeviceBaseAddress(CFG_EXTRA_FLASH_DEVICE);
  94         for(i=1;i<CFG_MAX_FLASH_BANKS;i++) {
  95             unsigned long size = flash_get_size(CFG_EXTRA_FLASH_WIDTH, (vu_long *)base, &flash_info[i]);
  96
  97 #ifndef CONFIG_P3G4
  98             printf("[");
  99             print_size (size, "");
 100             printf("@%08lX] ", base);
 101 #endif
 102
 103             if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 104                 if(i==1) {
 105                     printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n",
 106                             base, size_b1, size_b1<<20);
 107                 }
 108                 break;
 109             }
 110             size_b1+=size;
 111             base+=size;
 112         }
 113
 114 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 115         /* monitor protection ON by default */
 116         flash_protect(FLAG_PROTECT_SET,
 117                       CFG_MONITOR_BASE,
 118                       CFG_MONITOR_BASE + monitor_flash_len - 1,
 119                       flash_get_info(CFG_MONITOR_BASE));
 120 #endif
 121
 122 #ifdef  CFG_ENV_IS_IN_FLASH
 123         /* ENV protection ON by default */
 124         flash_protect(FLAG_PROTECT_SET,
 125                       CFG_ENV_ADDR,
 126                       CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
 127                       flash_get_info(CFG_ENV_ADDR));
 128 #endif
 129
 130         flash_size = size_b0 + size_b1;
 131         return flash_size;
 132 }
 133
 134 /*-----------------------------------------------------------------------
 135  */
 136 static void
 137 flash_get_offsets (ulong base, flash_info_t *info)
 138 {
 139         int i;
 140         int sector_size;
 141
 142         if(!info->sector_count) return;
 143
 144         /* set up sector start address table */
 145         switch(info->flash_id & FLASH_TYPEMASK) {
 146             case FLASH_AM040:
 147             case FLASH_28F128J3A:
 148             case FLASH_28F640J3A:
 149             case FLASH_RAM:
 150                 /* this chip has uniformly spaced sectors */
 151                 sector_size=info->size/info->sector_count;
 152                 for (i = 0; i < info->sector_count; i++)
 153                         info->start[i] = base + (i * sector_size);
 154                 break;
 155             default:
 156                 if (info->flash_id & FLASH_BTYPE) {
 157                     /* set sector offsets for bottom boot block type    */
 158                     info->start[0] = base + 0x00000000;
 159                     info->start[1] = base + 0x00008000;
 160                     info->start[2] = base + 0x0000C000;
 161                     info->start[3] = base + 0x00010000;
 162                     for (i = 4; i < info->sector_count; i++) {
 163                             info->start[i] = base + (i * 0x00020000) - 0x00060000;
 164                     }
 165                 } else {
 166                     /* set sector offsets for top boot block type               */
 167                     i = info->sector_count - 1;
 168                     info->start[i--] = base + info->size - 0x00008000;
 169                     info->start[i--] = base + info->size - 0x0000C000;
 170                     info->start[i--] = base + info->size - 0x00010000;
 171                     for (; i >= 0; i--) {
 172                             info->start[i] = base + i * 0x00020000;
 173                     }
 174                 }
 175         }
 176 }
 177
 178 /*-----------------------------------------------------------------------
 179  */
 180
 181 static flash_info_t *flash_get_info(ulong base)
 182 {
 183         int i;
 184         flash_info_t * info;
 185
 186         for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
 187                 info = & flash_info[i];
 188                 if (info->start[0] <= base && base <= info->start[0] + info->size - 1)
 189                         break;
 190         }
 191
 192         return i == CFG_MAX_FLASH_BANKS ? 0 : info;
 193 }
 194
 195 /*-----------------------------------------------------------------------
 196  */
 197 void
 198 flash_print_info  (flash_info_t *info)
 199 {
 200         int i;
 201
 202         if (info->flash_id == FLASH_UNKNOWN) {
 203                 printf ("missing or unknown FLASH type\n");
 204                 return;
 205         }
 206
 207         switch (info->flash_id & FLASH_VENDMASK) {
 208         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 209         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 210         case FLASH_MAN_INTEL:   printf ("INTEL ");              break;
 211         default:                printf ("Unknown Vendor ");     break;
 212         }
 213
 214         switch (info->flash_id & FLASH_TYPEMASK) {
 215         case FLASH_AM040:
 216                 printf ("AM29LV040B (4 Mbit, bottom boot sect)\n");
 217                 break;
 218         case FLASH_AM400B:
 219                 printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 220                 break;
 221         case FLASH_AM400T:
 222                 printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 223                 break;
 224         case FLASH_AM800B:
 225                 printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 226                 break;
 227         case FLASH_AM800T:
 228                 printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 229                 break;
 230         case FLASH_AM160B:
 231                 printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 232                 break;
 233         case FLASH_AM160T:
 234                 printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 235                 break;
 236         case FLASH_AM320B:
 237                 printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 238                 break;
 239         case FLASH_AM320T:
 240                 printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 241                 break;
 242         case FLASH_28F640J3A:
 243                 printf ("28F640J3A (64 Mbit)\n");
 244                 break;
 245         case FLASH_28F128J3A:
 246                 printf ("28F128J3A (128 Mbit)\n");
 247                 break;
 248         case FLASH_ROM:
 249                 printf ("ROM\n");
 250                 break;
 251         case FLASH_RAM:
 252                 printf ("RAM\n");
 253                 break;
 254         default:
 255                 printf ("Unknown Chip Type\n");
 256                 break;
 257         }
 258
 259         puts ("  Size: ");
 260         print_size (info->size, "");
 261         printf (" in %d Sectors\n", info->sector_count);
 262
 263         printf ("  Sector Start Addresses:");
 264         for (i=0; i<info->sector_count; ++i) {
 265                 if ((i % 5) == 0)
 266                         printf ("\n   ");
 267                 printf (" %08lX%s",
 268                         info->start[i],
 269                         info->protect[i] ? " (RO)" : "     "
 270                 );
 271         }
 272         printf ("\n");
 273         return;
 274 }
 275
 276 /*-----------------------------------------------------------------------
 277  */
 278
 279
 280 /*-----------------------------------------------------------------------
 281  */
 282
 283 /*
 284  * The following code cannot be run from FLASH!
 285  */
 286
 287 static inline void flash_cmd(int width, volatile unsigned char *addr, int offset, unsigned char cmd)
 288 {
 289         /* supports 1x8, 1x16, and 2x16 */
 290         /* 2x8 and 4x8 are not supported */
 291         if(width==4) {
 292             /* assuming chips are in 16 bit mode */
 293             /* 2x16 */
 294             unsigned long cmd32=(cmd<<16)|cmd;
 295             *(volatile unsigned long *)(addr+offset*2)=cmd32;
 296         } else if (width == 2) {
 297             /* 1x16 */
 298             *(volatile unsigned short *)((unsigned short*)addr+offset)=cmd;
 299         } else {
 300             /* 1x8 */
 301             *(volatile unsigned char *)(addr+offset)=cmd;
 302         }
 303 }
 304
 305 static ulong
 306 flash_get_size (int portwidth, vu_long *addr, flash_info_t *info)
 307 {
 308         short i;
 309         volatile unsigned char *caddr = (unsigned char *)addr;
 310         volatile unsigned short *saddr = (unsigned short *)addr;
 311         volatile unsigned long *laddr = (unsigned long *)addr;
 312         char old[2], save;
 313         ulong id, manu, base = (ulong)addr;
 314
 315         info->portwidth=portwidth;
 316
 317         save = *caddr;
 318
 319         flash_cmd(portwidth,caddr,0,0xf0);
 320         flash_cmd(portwidth,caddr,0,0xf0);
 321
 322         udelay(10);
 323
 324         old[0] = caddr[0];
 325         old[1] = caddr[1];
 326
 327
 328         if(old[0]!=0xf0) {
 329             flash_cmd(portwidth,caddr,0,0xf0);
 330             flash_cmd(portwidth,caddr,0,0xf0);
 331
 332             udelay(10);
 333
 334             if(*caddr==0xf0) {
 335                 /* this area is ROM */
 336                 *caddr=save;
 337 #ifndef FLASH_ID_OVERRIDE
 338                 info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
 339                 info->sector_count = 8;
 340                 info->size = 0x80000;
 341 #else
 342                 info->flash_id = FLASH_MAN_AMD + FLASH_AM040;
 343                 info->sector_count = 8;
 344                 info->size = 0x80000;
 345                 info->chipwidth=1;
 346 #endif
 347                 flash_get_offsets(base, info);
 348                 return info->size;
 349             }
 350         } else {
 351             *caddr=0;
 352
 353             udelay(10);
 354
 355             if(*caddr==0) {
 356                 /* this area is RAM */
 357                 *caddr=save;
 358                 info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN;
 359                 info->sector_count = 8;
 360                 info->size = 0x80000;
 361                 flash_get_offsets(base, info);
 362                 return info->size;
 363             }
 364             flash_cmd(portwidth,caddr,0,0xf0);
 365
 366             udelay(10);
 367         }
 368
 369         /* Write auto select command: read Manufacturer ID */
 370         flash_cmd(portwidth,caddr,0x555,0xAA);
 371         flash_cmd(portwidth,caddr,0x2AA,0x55);
 372         flash_cmd(portwidth,caddr,0x555,0x90);
 373
 374         udelay(10);
 375
 376         if ((caddr[0] == old[0]) &&
 377             (caddr[1] == old[1])) {
 378
 379             /* this area is ROM */
 380 #ifndef FLASH_ID_OVERRIDE
 381             info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
 382             info->sector_count = 8;
 383             info->size = 0x80000;
 384 #else
 385                 info->flash_id = FLASH_MAN_AMD + FLASH_AM040;
 386                 info->sector_count = 8;
 387                 info->size = 0x80000;
 388                 info->chipwidth=1;
 389 #endif
 390             flash_get_offsets(base, info);
 391             return info->size;
 392 #ifdef DEBUG
 393         } else {
 394             printf("%px%d: %02x:%02x -> %02x:%02x\n",
 395                     caddr, portwidth, old[0], old[1],
 396                     caddr[0], caddr[1]);
 397 #endif
 398         }
 399
 400         switch(portwidth) {
 401             case 1:
 402                 manu = caddr[0];
 403                 manu |= manu<<16;
 404                 id = caddr[1];
 405                 break;
 406             case 2:
 407                 manu = saddr[0];
 408                 manu |= manu<<16;
 409                 id = saddr[1];
 410                 id |= id<<16;
 411                 break;
 412             case 4:
 413                 manu = laddr[0];
 414                 id = laddr[1];
 415                 break;
 416         default:
 417                 id = manu = -1;
 418                 break;
 419         }
 420
 421 #ifdef DEBUG
 422         printf("\n%08lx:%08lx:%08lx\n", base, manu, id);
 423         printf("%08lx %08lx %08lx %08lx\n",
 424                 laddr[0],laddr[1],laddr[2],laddr[3]);
 425 #endif
 426
 427         switch (manu) {
 428             case AMD_MANUFACT:
 429                     info->flash_id = FLASH_MAN_AMD;
 430                     break;
 431             case FUJ_MANUFACT:
 432                     info->flash_id = FLASH_MAN_FUJ;
 433                     break;
 434             case INTEL_MANUFACT:
 435                     info->flash_id = FLASH_MAN_INTEL;
 436                     break;
 437             default:
 438                     printf("Unknown Mfr [%08lx]:%08lx\n", manu, id);
 439                     info->flash_id = FLASH_UNKNOWN;
 440                     info->sector_count = 0;
 441                     info->size = 0;
 442                     return (0);                 /* no or unknown flash  */
 443         }
 444
 445         switch (id) {
 446             case AMD_ID_LV400T:
 447                     info->flash_id += FLASH_AM400T;
 448                     info->sector_count = 11;
 449                     info->size = 0x00100000;
 450                     info->chipwidth=1;
 451                     break;                              /* => 1 MB      */
 452
 453             case AMD_ID_LV400B:
 454                     info->flash_id += FLASH_AM400B;
 455                     info->sector_count = 11;
 456                     info->size = 0x00100000;
 457                     info->chipwidth=1;
 458                     break;                              /* => 1 MB      */
 459
 460             case AMD_ID_LV800T:
 461                     info->flash_id += FLASH_AM800T;
 462                     info->sector_count = 19;
 463                     info->size = 0x00200000;
 464                     info->chipwidth=1;
 465                     break;                              /* => 2 MB      */
 466
 467             case AMD_ID_LV800B:
 468                     info->flash_id += FLASH_AM800B;
 469                     info->sector_count = 19;
 470                     info->size = 0x00200000;
 471                     info->chipwidth=1;
 472                     break;                              /* => 2 MB      */
 473
 474             case AMD_ID_LV160T:
 475                     info->flash_id += FLASH_AM160T;
 476                     info->sector_count = 35;
 477                     info->size = 0x00400000;
 478                     info->chipwidth=1;
 479                     break;                              /* => 4 MB      */
 480
 481             case AMD_ID_LV160B:
 482                     info->flash_id += FLASH_AM160B;
 483                     info->sector_count = 35;
 484                     info->size = 0x00400000;
 485                     info->chipwidth=1;
 486                     break;                              /* => 4 MB      */
 487 #if 0   /* enable when device IDs are available */
 488             case AMD_ID_LV320T:
 489                     info->flash_id += FLASH_AM320T;
 490                     info->sector_count = 67;
 491                     info->size = 0x00800000;
 492                     break;                              /* => 8 MB      */
 493
 494             case AMD_ID_LV320B:
 495                     info->flash_id += FLASH_AM320B;
 496                     info->sector_count = 67;
 497                     info->size = 0x00800000;
 498                     break;                              /* => 8 MB      */
 499 #endif
 500             case AMD_ID_LV040B:
 501                     info->flash_id += FLASH_AM040;
 502                     info->sector_count = 8;
 503                     info->size = 0x80000;
 504                     info->chipwidth=1;
 505                     break;
 506
 507             case INTEL_ID_28F640J3A:
 508                     info->flash_id += FLASH_28F640J3A;
 509                     info->sector_count = 64;
 510                     info->size = 128*1024 * 64; /* 128kbytes x 64 blocks */
 511                     info->chipwidth=2;
 512                     if(portwidth==4) info->size*=2;     /* 2x16 */
 513                     break;
 514
 515             case INTEL_ID_28F128J3A:
 516                     info->flash_id += FLASH_28F128J3A;
 517                     info->sector_count = 128;
 518                     info->size = 128*1024 * 128; /* 128kbytes x 128 blocks */
 519                     info->chipwidth=2;
 520                     if(portwidth==4) info->size*=2;     /* 2x16 */
 521                     break;
 522
 523             default:
 524                     printf("Unknown id %lx:[%lx]\n", manu, id);
 525                     info->flash_id = FLASH_UNKNOWN;
 526                     info->chipwidth=1;
 527                     return (0);                 /* => no or unknown flash */
 528
 529         }
 530
 531         flash_get_offsets(base, info);
 532
 533 #if 0
 534         /* set up sector start address table */
 535         if (info->flash_id & FLASH_AM040) {
 536                 /* this chip has uniformly spaced sectors */
 537                 for (i = 0; i < info->sector_count; i++)
 538                         info->start[i] = base + (i * 0x00010000);
 539
 540         } else if (info->flash_id & FLASH_BTYPE) {
 541                 /* set sector offsets for bottom boot block type        */
 542                 info->start[0] = base + 0x00000000;
 543                 info->start[1] = base + 0x00008000;
 544                 info->start[2] = base + 0x0000C000;
 545                 info->start[3] = base + 0x00010000;
 546                 for (i = 4; i < info->sector_count; i++) {
 547                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 548                 }
 549         } else {
 550                 /* set sector offsets for top boot block type           */
 551                 i = info->sector_count - 1;
 552                 info->start[i--] = base + info->size - 0x00008000;
 553                 info->start[i--] = base + info->size - 0x0000C000;
 554                 info->start[i--] = base + info->size - 0x00010000;
 555                 for (; i >= 0; i--) {
 556                         info->start[i] = base + i * 0x00020000;
 557                 }
 558         }
 559 #endif
 560
 561         /* check for protected sectors */
 562         for (i = 0; i < info->sector_count; i++) {
 563                 /* read sector protection at sector address, (A7 .. A0)=0x02 */
 564                 /* D0 = 1 if protected */
 565                 caddr = (volatile unsigned char *)(info->start[i]);
 566                 saddr = (volatile unsigned short *)(info->start[i]);
 567                 laddr = (volatile unsigned long *)(info->start[i]);
 568                 if(portwidth==1)
 569                     info->protect[i] = caddr[2] & 1;
 570                 else if(portwidth==2)
 571                     info->protect[i] = saddr[2] & 1;
 572                 else
 573                     info->protect[i] = laddr[2] & 1;
 574         }
 575
 576         /*
 577          * Prevent writes to uninitialized FLASH.
 578          */
 579         if (info->flash_id != FLASH_UNKNOWN) {
 580                 caddr = (volatile unsigned char *)info->start[0];
 581
 582                 flash_cmd(portwidth,caddr,0,0xF0);      /* reset bank */
 583         }
 584
 585         return (info->size);
 586 }
 587
 588 /* TODO: 2x16 unsupported */
 589 int
 590 flash_erase (flash_info_t *info, int s_first, int s_last)
 591 {
 592         volatile unsigned char *addr = (uchar *)(info->start[0]);
 593         int flag, prot, sect, l_sect;
 594         ulong start, now, last;
 595
 596         /* TODO: 2x16 unsupported */
 597         if(info->portwidth==4) return 1;
 598
 599         if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1;
 600         if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
 601             for (sect = s_first; sect<=s_last; sect++) {
 602                 int sector_size=info->size/info->sector_count;
 603                 addr = (uchar *)(info->start[sect]);
 604                 memset((void *)addr, 0, sector_size);
 605             }
 606             return 0;
 607         }
 608
 609         if ((s_first < 0) || (s_first > s_last)) {
 610                 if (info->flash_id == FLASH_UNKNOWN) {
 611                         printf ("- missing\n");
 612                 } else {
 613                         printf ("- no sectors to erase\n");
 614                 }
 615                 return 1;
 616         }
 617
 618         if ((info->flash_id&FLASH_VENDMASK) == FLASH_MAN_INTEL)  {
 619                 return flash_erase_intel(info,
 620                                 (unsigned short)s_first,
 621                                 (unsigned short)s_last);
 622         }
 623
 624 #if 0
 625         if ((info->flash_id == FLASH_UNKNOWN) ||
 626             (info->flash_id > FLASH_AMD_COMP)) {
 627                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 628                         info->flash_id);
 629                 return 1;
 630         }
 631 #endif
 632
 633         prot = 0;
 634         for (sect=s_first; sect<=s_last; ++sect) {
 635                 if (info->protect[sect]) {
 636                         prot++;
 637                 }
 638         }
 639
 640         if (prot) {
 641                 printf ("- Warning: %d protected sectors will not be erased!\n",
 642                         prot);
 643         } else {
 644                 printf ("\n");
 645         }
 646
 647         l_sect = -1;
 648
 649         /* Disable interrupts which might cause a timeout here */
 650         flag = disable_interrupts();
 651
 652         flash_cmd(info->portwidth,addr,0x555,0xAA);
 653         flash_cmd(info->portwidth,addr,0x2AA,0x55);
 654         flash_cmd(info->portwidth,addr,0x555,0x80);
 655         flash_cmd(info->portwidth,addr,0x555,0xAA);
 656         flash_cmd(info->portwidth,addr,0x2AA,0x55);
 657
 658         /* Start erase on unprotected sectors */
 659         for (sect = s_first; sect<=s_last; sect++) {
 660                 if (info->protect[sect] == 0) { /* not protected */
 661                         addr = (uchar *)(info->start[sect]);
 662                         flash_cmd(info->portwidth,addr,0,0x30);
 663                         l_sect = sect;
 664                 }
 665         }
 666
 667         /* re-enable interrupts if necessary */
 668         if (flag)
 669                 enable_interrupts();
 670
 671         /* wait at least 80us - let's wait 1 ms */
 672         udelay (1000);
 673
 674         /*
 675          * We wait for the last triggered sector
 676          */
 677         if (l_sect < 0)
 678                 goto DONE;
 679
 680         start = get_timer (0);
 681         last  = start;
 682         addr = (volatile unsigned char *)(info->start[l_sect]);
 683         /* broken for 2x16: TODO */
 684         while ((addr[0] & 0x80) != 0x80) {
 685                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 686                         printf ("Timeout\n");
 687                         return 1;
 688                 }
 689                 /* show that we're waiting */
 690                 if ((now - last) > 1000) {      /* every second */
 691                         putc ('.');
 692                         last = now;
 693                 }
 694         }
 695
 696 DONE:
 697         /* reset to read mode */
 698         addr = (volatile unsigned char *)info->start[0];
 699         flash_cmd(info->portwidth,addr,0,0xf0);
 700         flash_cmd(info->portwidth,addr,0,0xf0);
 701
 702         printf (" done\n");
 703         return 0;
 704 }
 705
 706 /*-----------------------------------------------------------------------
 707  * Copy memory to flash, returns:
 708  * 0 - OK
 709  * 1 - write timeout
 710  * 2 - Flash not erased
 711  */
 712
 713 /* broken for 2x16: TODO */
 714 int
 715 write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 716 {
 717         ulong cp, wp, data;
 718         int i, l, rc;
 719
 720         if(info->portwidth==4) return 1;
 721
 722         if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 0;
 723         if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
 724             memcpy((void *)addr, src, cnt);
 725             return 0;
 726         }
 727
 728         wp = (addr & ~3);       /* get lower word aligned address */
 729
 730         /*
 731          * handle unaligned start bytes
 732          */
 733         if ((l = addr - wp) != 0) {
 734                 data = 0;
 735                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 736                         data = (data << 8) | (*(uchar *)cp);
 737                 }
 738                 for (; i<4 && cnt>0; ++i) {
 739                         data = (data << 8) | *src++;
 740                         --cnt;
 741                         ++cp;
 742                 }
 743                 for (; cnt==0 && i<4; ++i, ++cp) {
 744                         data = (data << 8) | (*(uchar *)cp);
 745                 }
 746
 747                 if ((rc = write_word(info, wp, data)) != 0) {
 748                         return (rc);
 749                 }
 750                 wp += 4;
 751         }
 752
 753         /*
 754          * handle word aligned part
 755          */
 756         while (cnt >= 4) {
 757                 data = 0;
 758                 for (i=0; i<4; ++i) {
 759                         data = (data << 8) | *src++;
 760                 }
 761                 if ((rc = write_word(info, wp, data)) != 0) {
 762                         return (rc);
 763                 }
 764                 wp  += 4;
 765                 cnt -= 4;
 766         }
 767
 768         if (cnt == 0) {
 769                 return (0);
 770         }
 771
 772         /*
 773          * handle unaligned tail bytes
 774          */
 775         data = 0;
 776         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 777                 data = (data << 8) | *src++;
 778                 --cnt;
 779         }
 780         for (; i<4; ++i, ++cp) {
 781                 data = (data << 8) | (*(uchar *)cp);
 782         }
 783
 784         return (write_word(info, wp, data));
 785 }
 786
 787 /*-----------------------------------------------------------------------
 788  * Write a word to Flash, returns:
 789  * 0 - OK
 790  * 1 - write timeout
 791  * 2 - Flash not erased
 792  */
 793 /* broken for 2x16: TODO */
 794 static int
 795 write_word (flash_info_t *info, ulong dest, ulong data)
 796 {
 797         volatile unsigned char *addr = (uchar *)(info->start[0]);
 798         ulong start;
 799         int flag, i;
 800
 801         if(info->portwidth==4) return 1;
 802
 803         if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1;
 804         if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
 805             *(unsigned long *)dest=data;
 806             return 0;
 807         }
 808         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)  {
 809                 unsigned short low = data & 0xffff;
 810                 unsigned short hi  = (data >> 16) & 0xffff;
 811                 int ret = write_word_intel((bank_addr_t)dest, hi);
 812
 813                 if (!ret) ret = write_word_intel((bank_addr_t)(dest+2), low);
 814
 815                 return ret;
 816         }
 817
 818         /* Check if Flash is (sufficiently) erased */
 819         if ((*((vu_long *)dest) & data) != data) {
 820                 return (2);
 821         }
 822         /* Disable interrupts which might cause a timeout here */
 823         flag = disable_interrupts();
 824
 825         /* first, perform an unlock bypass command to speed up flash writes */
 826         addr[0x555] = 0xAA;
 827         addr[0x2AA] = 0x55;
 828         addr[0x555] = 0x20;
 829
 830         /* write each byte out */
 831         for (i = 0; i < 4; i++) {
 832                 char *data_ch = (char *)&data;
 833                 addr[0] = 0xA0;
 834                 *(((char *)dest)+i) = data_ch[i];
 835                 udelay(10); /* XXX */
 836         }
 837
 838         /* we're done, now do an unlock bypass reset */
 839         addr[0] = 0x90;
 840         addr[0] = 0x00;
 841
 842         /* re-enable interrupts if necessary */
 843         if (flag)
 844                 enable_interrupts();
 845
 846         /* data polling for D7 */
 847         start = get_timer (0);
 848         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 849                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 850                         return (1);
 851                 }
 852         }
 853         return (0);
 854 }