board/evb64260/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * flash.c - flash support for the 512k, 8bit boot flash on the GEVB
  10  *           most of this file was based on the existing U-Boot
  11  *           flash drivers.
  12  */
  13
  14 #include <common.h>
  15 #include <mpc8xx.h>
  16 #include <galileo/gt64260R.h>
  17 #include <galileo/memory.h>
  18 #include "intel_flash.h"
  19
  20 #define FLASH_ROM       0xFFFD       /* unknown flash type                   */
  21 #define FLASH_RAM       0xFFFE       /* unknown flash type                   */
  22 #define FLASH_MAN_UNKNOWN 0xFFFF0000
  23
  24 /* #define DEBUG */
  25 /* #define FLASH_ID_OVERRIDE */ /* Hack to set type to 040B if ROM emulator is installed.
  26                                  * Can be used to program a ROM in circuit if a programmer
  27                                  * is not available by swapping the rom out. */
  28
  29 /* Intel flash commands */
  30 int flash_erase_intel(flash_info_t *info, int s_first, int s_last);
  31 int write_word_intel(bank_addr_t addr, bank_word_t value);
  32
  33 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  34
  35 /*-----------------------------------------------------------------------
  36  * Functions
  37  */
  38 static ulong flash_get_size (int portwidth, vu_long *addr, flash_info_t *info);
  39 static int write_word (flash_info_t *info, ulong dest, ulong data);
  40 static void flash_get_offsets (ulong base, flash_info_t *info);
  41
  42 /*-----------------------------------------------------------------------
  43  */
  44
  45 unsigned long
  46 flash_init (void)
  47 {
  48         unsigned int i;
  49         unsigned long size_b0 = 0, size_b1 = 0;
  50         unsigned long base, flash_size;
  51
  52         /* Init: no FLASHes known */
  53         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  54                 flash_info[i].flash_id = FLASH_UNKNOWN;
  55         }
  56
  57         /* the boot flash */
  58         base = CONFIG_SYS_FLASH_BASE;
  59 #ifndef CONFIG_SYS_BOOT_FLASH_WIDTH
  60 #define CONFIG_SYS_BOOT_FLASH_WIDTH     1
  61 #endif
  62         size_b0 = flash_get_size(CONFIG_SYS_BOOT_FLASH_WIDTH, (vu_long *)base,
  63                                  &flash_info[0]);
  64
  65 #ifndef CONFIG_P3G4
  66         printf("[");
  67         print_size (size_b0, "");
  68         printf("@%08lX] ", base);
  69 #endif
  70
  71         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  72                 printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n",
  73                         base, size_b0, size_b0<<20);
  74         }
  75
  76         base = memoryGetDeviceBaseAddress(CONFIG_SYS_EXTRA_FLASH_DEVICE);
  77         for(i=1;i<CONFIG_SYS_MAX_FLASH_BANKS;i++) {
  78             unsigned long size = flash_get_size(CONFIG_SYS_EXTRA_FLASH_WIDTH, (vu_long *)base, &flash_info[i]);
  79
  80 #ifndef CONFIG_P3G4
  81             printf("[");
  82             print_size (size, "");
  83             printf("@%08lX] ", base);
  84 #endif
  85
  86             if (flash_info[i].flash_id == FLASH_UNKNOWN) {
  87                 if(i==1) {
  88                     printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n",
  89                             base, size_b1, size_b1<<20);
  90                 }
  91                 break;
  92             }
  93             size_b1+=size;
  94             base+=size;
  95         }
  96
  97 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  98         /* monitor protection ON by default */
  99         flash_protect(FLAG_PROTECT_SET,
 100                       CONFIG_SYS_MONITOR_BASE,
 101                       CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
 102                       flash_get_info(CONFIG_SYS_MONITOR_BASE));
 103 #endif
 104
 105 #ifdef  CONFIG_ENV_IS_IN_FLASH
 106         /* ENV protection ON by default */
 107         flash_protect(FLAG_PROTECT_SET,
 108                       CONFIG_ENV_ADDR,
 109                       CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 110                       flash_get_info(CONFIG_ENV_ADDR));
 111 #endif
 112
 113         flash_size = size_b0 + size_b1;
 114         return flash_size;
 115 }
 116
 117 /*-----------------------------------------------------------------------
 118  */
 119 static void
 120 flash_get_offsets (ulong base, flash_info_t *info)
 121 {
 122         int i;
 123         int sector_size;
 124
 125         if(!info->sector_count) return;
 126
 127         /* set up sector start address table */
 128         switch(info->flash_id & FLASH_TYPEMASK) {
 129             case FLASH_AM040:
 130             case FLASH_28F128J3A:
 131             case FLASH_28F640J3A:
 132             case FLASH_RAM:
 133                 /* this chip has uniformly spaced sectors */
 134                 sector_size=info->size/info->sector_count;
 135                 for (i = 0; i < info->sector_count; i++)
 136                         info->start[i] = base + (i * sector_size);
 137                 break;
 138             default:
 139                 if (info->flash_id & FLASH_BTYPE) {
 140                     /* set sector offsets for bottom boot block type    */
 141                     info->start[0] = base + 0x00000000;
 142                     info->start[1] = base + 0x00008000;
 143                     info->start[2] = base + 0x0000C000;
 144                     info->start[3] = base + 0x00010000;
 145                     for (i = 4; i < info->sector_count; i++) {
 146                             info->start[i] = base + (i * 0x00020000) - 0x00060000;
 147                     }
 148                 } else {
 149                     /* set sector offsets for top boot block type               */
 150                     i = info->sector_count - 1;
 151                     info->start[i--] = base + info->size - 0x00008000;
 152                     info->start[i--] = base + info->size - 0x0000C000;
 153                     info->start[i--] = base + info->size - 0x00010000;
 154                     for (; i >= 0; i--) {
 155                             info->start[i] = base + i * 0x00020000;
 156                     }
 157                 }
 158         }
 159 }
 160
 161 /*-----------------------------------------------------------------------
 162  */
 163
 164 flash_info_t *flash_get_info(ulong base)
 165 {
 166         int i;
 167         flash_info_t * info;
 168
 169         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i ++) {
 170                 info = & flash_info[i];
 171                 if (info->start[0] <= base && base <= info->start[0] + info->size - 1)
 172                         break;
 173         }
 174
 175         return i == CONFIG_SYS_MAX_FLASH_BANKS ? 0 : info;
 176 }
 177
 178 /*-----------------------------------------------------------------------
 179  */
 180 void
 181 flash_print_info  (flash_info_t *info)
 182 {
 183         int i;
 184
 185         if (info->flash_id == FLASH_UNKNOWN) {
 186                 printf ("missing or unknown FLASH type\n");
 187                 return;
 188         }
 189
 190         switch (info->flash_id & FLASH_VENDMASK) {
 191         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 192         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 193         case FLASH_MAN_INTEL:   printf ("INTEL ");              break;
 194         default:                printf ("Unknown Vendor ");     break;
 195         }
 196
 197         switch (info->flash_id & FLASH_TYPEMASK) {
 198         case FLASH_AM040:
 199                 printf ("AM29LV040B (4 Mbit, bottom boot sect)\n");
 200                 break;
 201         case FLASH_AM400B:
 202                 printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 203                 break;
 204         case FLASH_AM400T:
 205                 printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 206                 break;
 207         case FLASH_AM800B:
 208                 printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 209                 break;
 210         case FLASH_AM800T:
 211                 printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 212                 break;
 213         case FLASH_AM160B:
 214                 printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 215                 break;
 216         case FLASH_AM160T:
 217                 printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 218                 break;
 219         case FLASH_AM320B:
 220                 printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 221                 break;
 222         case FLASH_AM320T:
 223                 printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 224                 break;
 225         case FLASH_28F640J3A:
 226                 printf ("28F640J3A (64 Mbit)\n");
 227                 break;
 228         case FLASH_28F128J3A:
 229                 printf ("28F128J3A (128 Mbit)\n");
 230                 break;
 231         case FLASH_ROM:
 232                 printf ("ROM\n");
 233                 break;
 234         case FLASH_RAM:
 235                 printf ("RAM\n");
 236                 break;
 237         default:
 238                 printf ("Unknown Chip Type\n");
 239                 break;
 240         }
 241
 242         puts ("  Size: ");
 243         print_size (info->size, "");
 244         printf (" in %d Sectors\n", info->sector_count);
 245
 246         printf ("  Sector Start Addresses:");
 247         for (i=0; i<info->sector_count; ++i) {
 248                 if ((i % 5) == 0)
 249                         printf ("\n   ");
 250                 printf (" %08lX%s",
 251                         info->start[i],
 252                         info->protect[i] ? " (RO)" : "     "
 253                 );
 254         }
 255         printf ("\n");
 256         return;
 257 }
 258
 259 /*-----------------------------------------------------------------------
 260  */
 261
 262
 263 /*-----------------------------------------------------------------------
 264  */
 265
 266 /*
 267  * The following code cannot be run from FLASH!
 268  */
 269
 270 static inline void flash_cmd(int width, volatile unsigned char *addr, int offset, unsigned char cmd)
 271 {
 272         /* supports 1x8, 1x16, and 2x16 */
 273         /* 2x8 and 4x8 are not supported */
 274         if(width==4) {
 275             /* assuming chips are in 16 bit mode */
 276             /* 2x16 */
 277             unsigned long cmd32=(cmd<<16)|cmd;
 278             *(volatile unsigned long *)(addr+offset*2)=cmd32;
 279         } else if (width == 2) {
 280             /* 1x16 */
 281             *(volatile unsigned short *)((unsigned short*)addr+offset)=cmd;
 282         } else {
 283             /* 1x8 */
 284             *(volatile unsigned char *)(addr+offset)=cmd;
 285         }
 286 }
 287
 288 static ulong
 289 flash_get_size (int portwidth, vu_long *addr, flash_info_t *info)
 290 {
 291         short i;
 292         volatile unsigned char *caddr = (unsigned char *)addr;
 293         volatile unsigned short *saddr = (unsigned short *)addr;
 294         volatile unsigned long *laddr = (unsigned long *)addr;
 295         char old[2], save;
 296         ulong id, manu, base = (ulong)addr;
 297
 298         info->portwidth=portwidth;
 299
 300         save = *caddr;
 301
 302         flash_cmd(portwidth,caddr,0,0xf0);
 303         flash_cmd(portwidth,caddr,0,0xf0);
 304
 305         udelay(10);
 306
 307         old[0] = caddr[0];
 308         old[1] = caddr[1];
 309
 310
 311         if(old[0]!=0xf0) {
 312             flash_cmd(portwidth,caddr,0,0xf0);
 313             flash_cmd(portwidth,caddr,0,0xf0);
 314
 315             udelay(10);
 316
 317             if(*caddr==0xf0) {
 318                 /* this area is ROM */
 319                 *caddr=save;
 320 #ifndef FLASH_ID_OVERRIDE
 321                 info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
 322                 info->sector_count = 8;
 323                 info->size = 0x80000;
 324 #else
 325                 info->flash_id = FLASH_MAN_AMD + FLASH_AM040;
 326                 info->sector_count = 8;
 327                 info->size = 0x80000;
 328                 info->chipwidth=1;
 329 #endif
 330                 flash_get_offsets(base, info);
 331                 return info->size;
 332             }
 333         } else {
 334             *caddr=0;
 335
 336             udelay(10);
 337
 338             if(*caddr==0) {
 339                 /* this area is RAM */
 340                 *caddr=save;
 341                 info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN;
 342                 info->sector_count = 8;
 343                 info->size = 0x80000;
 344                 flash_get_offsets(base, info);
 345                 return info->size;
 346             }
 347             flash_cmd(portwidth,caddr,0,0xf0);
 348
 349             udelay(10);
 350         }
 351
 352         /* Write auto select command: read Manufacturer ID */
 353         flash_cmd(portwidth,caddr,0x555,0xAA);
 354         flash_cmd(portwidth,caddr,0x2AA,0x55);
 355         flash_cmd(portwidth,caddr,0x555,0x90);
 356
 357         udelay(10);
 358
 359         if ((caddr[0] == old[0]) &&
 360             (caddr[1] == old[1])) {
 361
 362             /* this area is ROM */
 363 #ifndef FLASH_ID_OVERRIDE
 364             info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
 365             info->sector_count = 8;
 366             info->size = 0x80000;
 367 #else
 368                 info->flash_id = FLASH_MAN_AMD + FLASH_AM040;
 369                 info->sector_count = 8;
 370                 info->size = 0x80000;
 371                 info->chipwidth=1;
 372 #endif
 373             flash_get_offsets(base, info);
 374             return info->size;
 375 #ifdef DEBUG
 376         } else {
 377             printf("%px%d: %02x:%02x -> %02x:%02x\n",
 378                     caddr, portwidth, old[0], old[1],
 379                     caddr[0], caddr[1]);
 380 #endif
 381         }
 382
 383         switch(portwidth) {
 384             case 1:
 385                 manu = caddr[0];
 386                 manu |= manu<<16;
 387                 id = caddr[1];
 388                 break;
 389             case 2:
 390                 manu = saddr[0];
 391                 manu |= manu<<16;
 392                 id = saddr[1];
 393                 id |= id<<16;
 394                 break;
 395             case 4:
 396                 manu = laddr[0];
 397                 id = laddr[1];
 398                 break;
 399         default:
 400                 id = manu = -1;
 401                 break;
 402         }
 403
 404 #ifdef DEBUG
 405         printf("\n%08lx:%08lx:%08lx\n", base, manu, id);
 406         printf("%08lx %08lx %08lx %08lx\n",
 407                 laddr[0],laddr[1],laddr[2],laddr[3]);
 408 #endif
 409
 410         switch (manu) {
 411             case AMD_MANUFACT:
 412                     info->flash_id = FLASH_MAN_AMD;
 413                     break;
 414             case FUJ_MANUFACT:
 415                     info->flash_id = FLASH_MAN_FUJ;
 416                     break;
 417             case INTEL_MANUFACT:
 418                     info->flash_id = FLASH_MAN_INTEL;
 419                     break;
 420             default:
 421                     printf("Unknown Mfr [%08lx]:%08lx\n", manu, id);
 422                     info->flash_id = FLASH_UNKNOWN;
 423                     info->sector_count = 0;
 424                     info->size = 0;
 425                     return (0);                 /* no or unknown flash  */
 426         }
 427
 428         switch (id) {
 429             case AMD_ID_LV400T:
 430                     info->flash_id += FLASH_AM400T;
 431                     info->sector_count = 11;
 432                     info->size = 0x00100000;
 433                     info->chipwidth=1;
 434                     break;                              /* => 1 MB      */
 435
 436             case AMD_ID_LV400B:
 437                     info->flash_id += FLASH_AM400B;
 438                     info->sector_count = 11;
 439                     info->size = 0x00100000;
 440                     info->chipwidth=1;
 441                     break;                              /* => 1 MB      */
 442
 443             case AMD_ID_LV800T:
 444                     info->flash_id += FLASH_AM800T;
 445                     info->sector_count = 19;
 446                     info->size = 0x00200000;
 447                     info->chipwidth=1;
 448                     break;                              /* => 2 MB      */
 449
 450             case AMD_ID_LV800B:
 451                     info->flash_id += FLASH_AM800B;
 452                     info->sector_count = 19;
 453                     info->size = 0x00200000;
 454                     info->chipwidth=1;
 455                     break;                              /* => 2 MB      */
 456
 457             case AMD_ID_LV160T:
 458                     info->flash_id += FLASH_AM160T;
 459                     info->sector_count = 35;
 460                     info->size = 0x00400000;
 461                     info->chipwidth=1;
 462                     break;                              /* => 4 MB      */
 463
 464             case AMD_ID_LV160B:
 465                     info->flash_id += FLASH_AM160B;
 466                     info->sector_count = 35;
 467                     info->size = 0x00400000;
 468                     info->chipwidth=1;
 469                     break;                              /* => 4 MB      */
 470 #if 0   /* enable when device IDs are available */
 471             case AMD_ID_LV320T:
 472                     info->flash_id += FLASH_AM320T;
 473                     info->sector_count = 67;
 474                     info->size = 0x00800000;
 475                     break;                              /* => 8 MB      */
 476
 477             case AMD_ID_LV320B:
 478                     info->flash_id += FLASH_AM320B;
 479                     info->sector_count = 67;
 480                     info->size = 0x00800000;
 481                     break;                              /* => 8 MB      */
 482 #endif
 483             case AMD_ID_LV040B:
 484                     info->flash_id += FLASH_AM040;
 485                     info->sector_count = 8;
 486                     info->size = 0x80000;
 487                     info->chipwidth=1;
 488                     break;
 489
 490             case INTEL_ID_28F640J3A:
 491                     info->flash_id += FLASH_28F640J3A;
 492                     info->sector_count = 64;
 493                     info->size = 128*1024 * 64; /* 128kbytes x 64 blocks */
 494                     info->chipwidth=2;
 495                     if(portwidth==4) info->size*=2;     /* 2x16 */
 496                     break;
 497
 498             case INTEL_ID_28F128J3A:
 499                     info->flash_id += FLASH_28F128J3A;
 500                     info->sector_count = 128;
 501                     info->size = 128*1024 * 128; /* 128kbytes x 128 blocks */
 502                     info->chipwidth=2;
 503                     if(portwidth==4) info->size*=2;     /* 2x16 */
 504                     break;
 505
 506             default:
 507                     printf("Unknown id %lx:[%lx]\n", manu, id);
 508                     info->flash_id = FLASH_UNKNOWN;
 509                     info->chipwidth=1;
 510                     return (0);                 /* => no or unknown flash */
 511
 512         }
 513
 514         flash_get_offsets(base, info);
 515
 516 #if 0
 517         /* set up sector start address table */
 518         if (info->flash_id & FLASH_AM040) {
 519                 /* this chip has uniformly spaced sectors */
 520                 for (i = 0; i < info->sector_count; i++)
 521                         info->start[i] = base + (i * 0x00010000);
 522
 523         } else if (info->flash_id & FLASH_BTYPE) {
 524                 /* set sector offsets for bottom boot block type        */
 525                 info->start[0] = base + 0x00000000;
 526                 info->start[1] = base + 0x00008000;
 527                 info->start[2] = base + 0x0000C000;
 528                 info->start[3] = base + 0x00010000;
 529                 for (i = 4; i < info->sector_count; i++) {
 530                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 531                 }
 532         } else {
 533                 /* set sector offsets for top boot block type           */
 534                 i = info->sector_count - 1;
 535                 info->start[i--] = base + info->size - 0x00008000;
 536                 info->start[i--] = base + info->size - 0x0000C000;
 537                 info->start[i--] = base + info->size - 0x00010000;
 538                 for (; i >= 0; i--) {
 539                         info->start[i] = base + i * 0x00020000;
 540                 }
 541         }
 542 #endif
 543
 544         /* check for protected sectors */
 545         for (i = 0; i < info->sector_count; i++) {
 546                 /* read sector protection at sector address, (A7 .. A0)=0x02 */
 547                 /* D0 = 1 if protected */
 548                 caddr = (volatile unsigned char *)(info->start[i]);
 549                 saddr = (volatile unsigned short *)(info->start[i]);
 550                 laddr = (volatile unsigned long *)(info->start[i]);
 551                 if(portwidth==1)
 552                     info->protect[i] = caddr[2] & 1;
 553                 else if(portwidth==2)
 554                     info->protect[i] = saddr[2] & 1;
 555                 else
 556                     info->protect[i] = laddr[2] & 1;
 557         }
 558
 559         /*
 560          * Prevent writes to uninitialized FLASH.
 561          */
 562         if (info->flash_id != FLASH_UNKNOWN) {
 563                 caddr = (volatile unsigned char *)info->start[0];
 564
 565                 flash_cmd(portwidth,caddr,0,0xF0);      /* reset bank */
 566         }
 567
 568         return (info->size);
 569 }
 570
 571 /* TODO: 2x16 unsupported */
 572 int
 573 flash_erase (flash_info_t *info, int s_first, int s_last)
 574 {
 575         volatile unsigned char *addr = (uchar *)(info->start[0]);
 576         int flag, prot, sect, l_sect;
 577         ulong start, now, last;
 578
 579         /* TODO: 2x16 unsupported */
 580         if(info->portwidth==4) return 1;
 581
 582         if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1;
 583         if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
 584             for (sect = s_first; sect<=s_last; sect++) {
 585                 int sector_size=info->size/info->sector_count;
 586                 addr = (uchar *)(info->start[sect]);
 587                 memset((void *)addr, 0, sector_size);
 588             }
 589             return 0;
 590         }
 591
 592         if ((s_first < 0) || (s_first > s_last)) {
 593                 if (info->flash_id == FLASH_UNKNOWN) {
 594                         printf ("- missing\n");
 595                 } else {
 596                         printf ("- no sectors to erase\n");
 597                 }
 598                 return 1;
 599         }
 600
 601         if ((info->flash_id&FLASH_VENDMASK) == FLASH_MAN_INTEL)  {
 602                 return flash_erase_intel(info,
 603                                 (unsigned short)s_first,
 604                                 (unsigned short)s_last);
 605         }
 606
 607 #if 0
 608         if ((info->flash_id == FLASH_UNKNOWN) ||
 609             (info->flash_id > FLASH_AMD_COMP)) {
 610                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 611                         info->flash_id);
 612                 return 1;
 613         }
 614 #endif
 615
 616         prot = 0;
 617         for (sect=s_first; sect<=s_last; ++sect) {
 618                 if (info->protect[sect]) {
 619                         prot++;
 620                 }
 621         }
 622
 623         if (prot) {
 624                 printf ("- Warning: %d protected sectors will not be erased!\n",
 625                         prot);
 626         } else {
 627                 printf ("\n");
 628         }
 629
 630         l_sect = -1;
 631
 632         /* Disable interrupts which might cause a timeout here */
 633         flag = disable_interrupts();
 634
 635         flash_cmd(info->portwidth,addr,0x555,0xAA);
 636         flash_cmd(info->portwidth,addr,0x2AA,0x55);
 637         flash_cmd(info->portwidth,addr,0x555,0x80);
 638         flash_cmd(info->portwidth,addr,0x555,0xAA);
 639         flash_cmd(info->portwidth,addr,0x2AA,0x55);
 640
 641         /* Start erase on unprotected sectors */
 642         for (sect = s_first; sect<=s_last; sect++) {
 643                 if (info->protect[sect] == 0) { /* not protected */
 644                         addr = (uchar *)(info->start[sect]);
 645                         flash_cmd(info->portwidth,addr,0,0x30);
 646                         l_sect = sect;
 647                 }
 648         }
 649
 650         /* re-enable interrupts if necessary */
 651         if (flag)
 652                 enable_interrupts();
 653
 654         /* wait at least 80us - let's wait 1 ms */
 655         udelay (1000);
 656
 657         /*
 658          * We wait for the last triggered sector
 659          */
 660         if (l_sect < 0)
 661                 goto DONE;
 662
 663         start = get_timer (0);
 664         last  = start;
 665         addr = (volatile unsigned char *)(info->start[l_sect]);
 666         /* broken for 2x16: TODO */
 667         while ((addr[0] & 0x80) != 0x80) {
 668                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 669                         printf ("Timeout\n");
 670                         return 1;
 671                 }
 672                 /* show that we're waiting */
 673                 if ((now - last) > 1000) {      /* every second */
 674                         putc ('.');
 675                         last = now;
 676                 }
 677         }
 678
 679 DONE:
 680         /* reset to read mode */
 681         addr = (volatile unsigned char *)info->start[0];
 682         flash_cmd(info->portwidth,addr,0,0xf0);
 683         flash_cmd(info->portwidth,addr,0,0xf0);
 684
 685         printf (" done\n");
 686         return 0;
 687 }
 688
 689 /*-----------------------------------------------------------------------
 690  * Copy memory to flash, returns:
 691  * 0 - OK
 692  * 1 - write timeout
 693  * 2 - Flash not erased
 694  */
 695
 696 /* broken for 2x16: TODO */
 697 int
 698 write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 699 {
 700         ulong cp, wp, data;
 701         int i, l, rc;
 702
 703         if(info->portwidth==4) return 1;
 704
 705         if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 0;
 706         if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
 707             memcpy((void *)addr, src, cnt);
 708             return 0;
 709         }
 710
 711         wp = (addr & ~3);       /* get lower word aligned address */
 712
 713         /*
 714          * handle unaligned start bytes
 715          */
 716         if ((l = addr - wp) != 0) {
 717                 data = 0;
 718                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 719                         data = (data << 8) | (*(uchar *)cp);
 720                 }
 721                 for (; i<4 && cnt>0; ++i) {
 722                         data = (data << 8) | *src++;
 723                         --cnt;
 724                         ++cp;
 725                 }
 726                 for (; cnt==0 && i<4; ++i, ++cp) {
 727                         data = (data << 8) | (*(uchar *)cp);
 728                 }
 729
 730                 if ((rc = write_word(info, wp, data)) != 0) {
 731                         return (rc);
 732                 }
 733                 wp += 4;
 734         }
 735
 736         /*
 737          * handle word aligned part
 738          */
 739         while (cnt >= 4) {
 740                 data = 0;
 741                 for (i=0; i<4; ++i) {
 742                         data = (data << 8) | *src++;
 743                 }
 744                 if ((rc = write_word(info, wp, data)) != 0) {
 745                         return (rc);
 746                 }
 747                 wp  += 4;
 748                 cnt -= 4;
 749         }
 750
 751         if (cnt == 0) {
 752                 return (0);
 753         }
 754
 755         /*
 756          * handle unaligned tail bytes
 757          */
 758         data = 0;
 759         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 760                 data = (data << 8) | *src++;
 761                 --cnt;
 762         }
 763         for (; i<4; ++i, ++cp) {
 764                 data = (data << 8) | (*(uchar *)cp);
 765         }
 766
 767         return (write_word(info, wp, data));
 768 }
 769
 770 /*-----------------------------------------------------------------------
 771  * Write a word to Flash, returns:
 772  * 0 - OK
 773  * 1 - write timeout
 774  * 2 - Flash not erased
 775  */
 776 /* broken for 2x16: TODO */
 777 static int
 778 write_word (flash_info_t *info, ulong dest, ulong data)
 779 {
 780         volatile unsigned char *addr = (uchar *)(info->start[0]);
 781         ulong start;
 782         int flag, i;
 783
 784         if(info->portwidth==4) return 1;
 785
 786         if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1;
 787         if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
 788             *(unsigned long *)dest=data;
 789             return 0;
 790         }
 791         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)  {
 792                 unsigned short low = data & 0xffff;
 793                 unsigned short hi  = (data >> 16) & 0xffff;
 794                 int ret = write_word_intel((bank_addr_t)dest, hi);
 795
 796                 if (!ret) ret = write_word_intel((bank_addr_t)(dest+2), low);
 797
 798                 return ret;
 799         }
 800
 801         /* Check if Flash is (sufficiently) erased */
 802         if ((*((vu_long *)dest) & data) != data) {
 803                 return (2);
 804         }
 805         /* Disable interrupts which might cause a timeout here */
 806         flag = disable_interrupts();
 807
 808         /* first, perform an unlock bypass command to speed up flash writes */
 809         addr[0x555] = 0xAA;
 810         addr[0x2AA] = 0x55;
 811         addr[0x555] = 0x20;
 812
 813         /* write each byte out */
 814         for (i = 0; i < 4; i++) {
 815                 char *data_ch = (char *)&data;
 816                 addr[0] = 0xA0;
 817                 *(((char *)dest)+i) = data_ch[i];
 818                 udelay(10); /* XXX */
 819         }
 820
 821         /* we're done, now do an unlock bypass reset */
 822         addr[0] = 0x90;
 823         addr[0] = 0x00;
 824
 825         /* re-enable interrupts if necessary */
 826         if (flag)
 827                 enable_interrupts();
 828
 829         /* data polling for D7 */
 830         start = get_timer (0);
 831         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 832                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 833                         return (1);
 834                 }
 835         }
 836         return (0);
 837 }