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