board/mpc8540eval/flash.c

   1 /*
   2  * (C) Copyright 2003 Motorola Inc.
   3  *  Xianghua Xiao,(X.Xiao@motorola.com)
   4  *
   5  * (C) Copyright 2000, 2001
   6  *  Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
   9  * Add support the Sharp chips on the mpc8260ads.
  10  * I started with board/ip860/flash.c and made changes I found in
  11  * the MTD project by David Schleef.
  12  *
  13  * See file CREDITS for list of people who contributed to this
  14  * project.
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License as
  18  * published by the Free Software Foundation; either version 2 of
  19  * the License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  29  * MA 02111-1307 USA
  30  */
  31
  32 #include <common.h>
  33
  34 #if !defined(CFG_NO_FLASH)
  35
  36 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  37
  38 #if defined(CONFIG_ENV_IS_IN_FLASH)
  39 # ifndef  CONFIG_ENV_ADDR
  40 #  define CONFIG_ENV_ADDR       (CFG_FLASH_BASE + CONFIG_ENV_OFFSET)
  41 # endif
  42 # ifndef  CONFIG_ENV_SIZE
  43 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  44 # endif
  45 # ifndef  CONFIG_ENV_SECT_SIZE
  46 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  47 # endif
  48 #endif
  49
  50 /*
  51  * The variable should be in the flash info structure. Since it
  52  * is only used in this board specific file it is declared here.
  53  * In the future I think an endian flag should be part of the
  54  * flash_info_t structure. (Ron Alder)
  55  */
  56 static ulong big_endian = 0;
  57
  58 /*-----------------------------------------------------------------------
  59  * Functions
  60  */
  61 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  62 static int write_block (flash_info_t *info, uchar * src, ulong dest, ulong cnt);
  63 static int write_short (flash_info_t *info, ulong dest, ushort data);
  64 static int write_word (flash_info_t *info, ulong dest, ulong data);
  65 static int clear_block_lock_bit(flash_info_t *info, vu_long * addr);
  66 /*-----------------------------------------------------------------------
  67  */
  68
  69 unsigned long flash_init (void)
  70 {
  71         unsigned long size;
  72         int i;
  73
  74         /* Init: enable write,
  75          * or we cannot even write flash commands
  76          */
  77         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  78                 flash_info[i].flash_id = FLASH_UNKNOWN;
  79
  80                 /* set the default sector offset */
  81         }
  82
  83         /* Static FLASH Bank configuration here - FIXME XXX */
  84
  85         size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
  86
  87         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  88                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  89                         size, size<<20);
  90         }
  91
  92         /* Re-do sizing to get full correct info */
  93         size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
  94
  95         flash_info[0].size = size;
  96
  97 #if !defined(CONFIG_RAM_AS_FLASH)
  98 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
  99         /* monitor protection ON by default */
 100         flash_protect(FLAG_PROTECT_SET,
 101                       CFG_MONITOR_BASE,
 102                       CFG_MONITOR_BASE+monitor_flash_len-1,
 103                       &flash_info[0]);
 104 #endif
 105
 106 #ifdef  CONFIG_ENV_IS_IN_FLASH
 107         /* ENV protection ON by default */
 108         flash_protect(FLAG_PROTECT_SET,
 109                       CONFIG_ENV_ADDR,
 110                       CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
 111                       &flash_info[0]);
 112 #endif
 113 #endif
 114         return (size);
 115 }
 116
 117 /*-----------------------------------------------------------------------
 118  */
 119 void flash_print_info  (flash_info_t *info)
 120 {
 121         int i;
 122
 123         if (info->flash_id == FLASH_UNKNOWN) {
 124                 printf ("missing or unknown FLASH type\n");
 125                 return;
 126         }
 127
 128         switch (info->flash_id & FLASH_VENDMASK) {
 129         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 130         case FLASH_MAN_SHARP:   printf ("Sharp ");              break;
 131         default:                printf ("Unknown Vendor ");     break;
 132         }
 133
 134         switch (info->flash_id & FLASH_TYPEMASK) {
 135         case FLASH_28F016SV:    printf ("28F016SV (16 Mbit, 32 x 64k)\n");
 136                                 break;
 137         case FLASH_28F160S3:    printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
 138                                 break;
 139         case FLASH_28F320S3:    printf ("28F320S3 (32 Mbit, 64 x 512K)\n");
 140                                 break;
 141         case FLASH_LH28F016SCT: printf ("28F016SC (16 Mbit, 32 x 64K)\n");
 142                                 break;
 143         case FLASH_28F640J3A:   printf ("28F640J3A (64 Mbit, 64 x 128K)\n");
 144                                 break;
 145         default:                printf ("Unknown Chip Type\n");
 146                                 break;
 147         }
 148
 149         printf ("  Size: %ld MB in %d Sectors\n",
 150                 info->size >> 20, info->sector_count);
 151
 152         printf ("  Sector Start Addresses:");
 153         for (i=0; i<info->sector_count; ++i) {
 154                 if ((i % 5) == 0)
 155                         printf ("\n   ");
 156                 printf (" %08lX%s",
 157                         info->start[i],
 158                         info->protect[i] ? " (RO)" : "     "
 159                 );
 160         }
 161         printf ("\n");
 162 }
 163
 164  /* only deal with 16 bit and 32 bit port width, 16bit chip */
 165 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 166 {
 167         short i;
 168         ulong value,va,vb,vc,vd;
 169         ulong base = (ulong)addr;
 170         ulong sector_offset;
 171
 172 #ifdef DEBUG
 173         printf("Check flash at 0x%08x\n",(uint)addr);
 174 #endif
 175         /* Write "Intelligent Identifier" command: read Manufacturer ID */
 176         *addr = 0x90909090;
 177         udelay(20);
 178         asm("sync");
 179
 180 #ifndef CFG_FLASH_CFI
 181         printf("Not define CFG_FLASH_CFI\n");
 182         return (0);
 183 #else
 184         value = addr[0];
 185         va=(value & 0xFF000000)>>24;
 186         vb=(value & 0x00FF0000)>>16;
 187         vc=(value & 0x0000FF00)>>8;
 188         vd=(value & 0x000000FF);
 189         if ((va==0) && (vb==0)) {
 190                 printf("cannot identify Flash\n");
 191                 info->flash_id = FLASH_UNKNOWN;
 192                 info->sector_count = 0;
 193                 info->size = 0;
 194                 return (0);                     /* no or unknown flash  */
 195         }
 196         else if ((va==0) && (vb!=0)) {
 197                 big_endian = 1;
 198                 info->chipwidth = FLASH_CFI_BY16;
 199                 if(vb == vd) info->portwidth = FLASH_CFI_32BIT;
 200                 else info->portwidth = FLASH_CFI_16BIT;
 201         }
 202         else if ((va!=0) && (vb==0)) {
 203                 big_endian = 0;
 204                 info->chipwidth = FLASH_CFI_BY16;
 205                 if(va == vc) info->portwidth = FLASH_CFI_32BIT;
 206                 else info->portwidth = FLASH_CFI_16BIT;
 207         }
 208         else if ((va!=0) && (vb!=0)) {
 209                 big_endian = 1;         /* no meaning for 8bit chip */
 210                 info->chipwidth = FLASH_CFI_BY8;
 211                 if(va == vb) info->portwidth = FLASH_CFI_16BIT;
 212                 else info->portwidth = FLASH_CFI_8BIT;
 213         }
 214 #ifdef DEBUG
 215         switch (info->portwidth) {
 216                 case FLASH_CFI_8BIT:
 217                         printf("port width is 8 bit.\n");
 218                         break;
 219                 case FLASH_CFI_16BIT:
 220                         printf("port width is 16 bit, ");
 221                         break;
 222                 case FLASH_CFI_32BIT:
 223                         printf("port width is 32 bit, ");
 224                         break;
 225         }
 226         switch (info->chipwidth) {
 227                 case FLASH_CFI_BY16:
 228                         printf("chip width is 16 bit, ");
 229                         switch (big_endian) {
 230                                 case 0:
 231                                         printf("Little Endian.\n");
 232                                         break;
 233                                 case 1:
 234                                         printf("Big Endian.\n");
 235                                         break;
 236                         }
 237                         break;
 238         }
 239 #endif
 240 #endif          /*#ifdef CFG_FLASH_CFI*/
 241
 242         if (big_endian==0) value = (addr[0] & 0xFF000000) >>8;
 243         else value = (addr[0] & 0x00FF0000);
 244 #ifdef DEBUG
 245         printf("manufacturer=0x%x\n",(uint)(value>>16));
 246 #endif
 247         switch (value) {
 248         case MT_MANUFACT & 0xFFFF0000:  /* SHARP, MT or => Intel */
 249         case INTEL_ALT_MANU & 0xFFFF0000:
 250                 info->flash_id = FLASH_MAN_INTEL;
 251                 break;
 252         default:
 253                 printf("unknown manufacturer: %x\n", (unsigned int)value);
 254                 info->flash_id = FLASH_UNKNOWN;
 255                 info->sector_count = 0;
 256                 info->size = 0;
 257                 return (0);                     /* no or unknown flash  */
 258         }
 259
 260         if (info->portwidth==FLASH_CFI_16BIT) {
 261                 switch (big_endian) {
 262                         case 0:
 263                                 value = (addr[0] & 0x0000FF00)>>8;
 264                                 break;
 265                         case 1:
 266                                 value = (addr[0] & 0x000000FF);
 267                                 break;
 268                 }
 269         }
 270         else if (info->portwidth == FLASH_CFI_32BIT) {
 271                 switch (big_endian) {
 272                         case 0:
 273                                 value = (addr[1] & 0x0000FF00)>>8;
 274                                 break;
 275                         case 1:
 276                                 value = (addr[1] & 0x000000FF);
 277                                 break;
 278                 }
 279         }
 280
 281 #ifdef DEBUG
 282         printf("deviceID=0x%x\n",(uint)value);
 283 #endif
 284         switch (value) {
 285         case (INTEL_ID_28F016S & 0x0000FFFF):
 286                 info->flash_id += FLASH_28F016SV;
 287                 info->sector_count = 32;
 288                 sector_offset = 0x10000;
 289                 break;                          /* => 2 MB              */
 290
 291         case (INTEL_ID_28F160S3 & 0x0000FFFF):
 292                 info->flash_id += FLASH_28F160S3;
 293                 info->sector_count = 32;
 294                 sector_offset = 0x10000;
 295                 break;                          /* => 2 MB              */
 296
 297         case (INTEL_ID_28F320S3 & 0x0000FFFF):
 298                 info->flash_id += FLASH_28F320S3;
 299                 info->sector_count = 64;
 300                 sector_offset = 0x10000;
 301                 break;                          /* => 4 MB              */
 302
 303         case (INTEL_ID_28F640J3A & 0x0000FFFF):
 304                 info->flash_id += FLASH_28F640J3A;
 305                 info->sector_count = 64;
 306                 sector_offset = 0x20000;
 307                 break;                          /* => 8 MB             */
 308
 309         case SHARP_ID_28F016SCL & 0x0000FFFF:
 310         case SHARP_ID_28F016SCZ & 0x0000FFFF:
 311                 info->flash_id      = FLASH_MAN_SHARP | FLASH_LH28F016SCT;
 312                 info->sector_count  = 32;
 313                 sector_offset = 0x10000;
 314                 break;                          /* => 2 MB              */
 315
 316
 317         default:
 318                 info->flash_id = FLASH_UNKNOWN;
 319                 return (0);                     /* => no or unknown flash */
 320
 321         }
 322
 323         sector_offset = sector_offset * (info->portwidth / info->chipwidth);
 324         info->size = info->sector_count * sector_offset;
 325
 326         /* set up sector start address table */
 327         for (i = 0; i < info->sector_count; i++) {
 328                 info->start[i] = base;
 329                 base += sector_offset;
 330                 /* don't know how to check sector protection */
 331                 info->protect[i] = 0;
 332         }
 333
 334         /*
 335          * Prevent writes to uninitialized FLASH.
 336          */
 337         if (info->flash_id != FLASH_UNKNOWN) {
 338                 addr = (vu_long *)info->start[0];
 339                 *addr = 0xFFFFFF;       /* reset bank to read array mode */
 340                 asm("sync");
 341         }
 342
 343         return (info->size);
 344 }
 345
 346
 347 /*-----------------------------------------------------------------------
 348  */
 349
 350 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 351 {
 352         int flag, prot, sect;
 353         ulong start, now, last, ready, erase_err_status;
 354
 355         if (big_endian == 1) {
 356                 ready = 0x0080;
 357                 erase_err_status = 0x00a0;
 358         }
 359         else {
 360                 ready = 0x8000;
 361                 erase_err_status = 0xa000;
 362         }
 363         if ((info->portwidth / info->chipwidth)==2) {
 364                 ready += (ready <<16);
 365                 erase_err_status += (erase_err_status <<16);
 366         }
 367
 368 #ifdef DEBUG
 369         printf ("\nReady flag is 0x%lx\nErase error flag is 0x%lx", ready, erase_err_status);
 370 #endif
 371
 372         if ((s_first < 0) || (s_first > s_last)) {
 373                 if (info->flash_id == FLASH_UNKNOWN) {
 374                         printf ("- missing\n");
 375                 } else {
 376                         printf ("- no sectors to erase\n");
 377                 }
 378                 return 1;
 379         }
 380
 381         if (    ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL)
 382              && ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_SHARP) ) {
 383                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 384                         info->flash_id);
 385                 return 1;
 386         }
 387
 388         prot = 0;
 389         for (sect=s_first; sect<=s_last; ++sect) {
 390                 if (info->protect[sect]) {
 391                         prot++;
 392                 }
 393         }
 394
 395         if (prot) {
 396                 printf ("- Warning: %d protected sectors will not be erased!\n",
 397                         prot);
 398         } else {
 399                 printf ("\n");
 400         }
 401
 402 #ifdef DEBUG
 403         printf("\nFlash Erase:\n");
 404 #endif
 405         /* Make Sure Block Lock Bit is not set. */
 406         if(clear_block_lock_bit(info, (vu_long *)(info->start[s_first]))){
 407                 return 1;
 408         }
 409
 410         /* Start erase on unprotected sectors */
 411 #if defined(DEBUG)
 412         printf("Begin to erase now,s_first=0x%x s_last=0x%x...\n",s_first,s_last);
 413 #endif
 414         for (sect = s_first; sect<=s_last; sect++) {
 415                 if (info->protect[sect] == 0) { /* not protected */
 416                         vu_short *addr16 = (vu_short *)(info->start[sect]);
 417                         vu_long *addr   = (vu_long *)(info->start[sect]);
 418                         printf(".");
 419                         switch (info->portwidth) {
 420                                 case FLASH_CFI_16BIT:
 421                                         asm("sync");
 422                                         last = start = get_timer (0);
 423                                         /* Disable interrupts which might cause a timeout here */
 424                                         flag = disable_interrupts();
 425                                         /* Reset Array */
 426                                         *addr16 = 0xffff;
 427                                         asm("sync");
 428                                         /* Clear Status Register */
 429                                         *addr16 = 0x5050;
 430                                         asm("sync");
 431                                         /* Single Block Erase Command */
 432                                         *addr16 = 0x2020;
 433                                         asm("sync");
 434                                         /* Confirm */
 435                                         *addr16 = 0xD0D0;
 436                                         asm("sync");
 437                                         if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
 438                                             /* Resume Command, as per errata update */
 439                                             *addr16 = 0xD0D0;
 440                                             asm("sync");
 441                                         }
 442                                         /* re-enable interrupts if necessary */
 443                                         if (flag)
 444                                                 enable_interrupts();
 445                                         /* wait at least 80us - let's wait 1 ms */
 446                                         *addr16 = 0x7070;
 447                                         udelay (1000);
 448                                         while ((*addr16 & ready) != ready) {
 449                                                 if((*addr16 & erase_err_status)== erase_err_status){
 450                                                         printf("Error in Block Erase - Lock Bit may be set!\n");
 451                                                         printf("Status Register = 0x%X\n", (uint)*addr16);
 452                                                         *addr16 = 0xFFFF;       /* reset bank */
 453                                                         asm("sync");
 454                                                         return 1;
 455                                                 }
 456                                                 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 457                                                         printf ("Timeout\n");
 458                                                         *addr16 = 0xFFFF;       /* reset bank */
 459                                                         asm("sync");
 460                                                         return 1;
 461                                                 }
 462                                                 /* show that we're waiting */
 463                                                 if ((now - last) > 1000) {      /* every second */
 464                                                         putc ('.');
 465                                                         last = now;
 466                                                 }
 467                                         }
 468                                         /* reset to read mode */
 469                                         *addr16 = 0xFFFF;
 470                                         asm("sync");
 471                                         break;
 472                                 case FLASH_CFI_32BIT:
 473                                         asm("sync");
 474                                         last = start = get_timer (0);
 475                                         /* Disable interrupts which might cause a timeout here */
 476                                         flag = disable_interrupts();
 477                                         /* Reset Array */
 478                                         *addr = 0xffffffff;
 479                                         asm("sync");
 480                                         /* Clear Status Register */
 481                                         *addr = 0x50505050;
 482                                         asm("sync");
 483                                         /* Single Block Erase Command */
 484                                         *addr = 0x20202020;
 485                                         asm("sync");
 486                                         /* Confirm */
 487                                         *addr = 0xD0D0D0D0;
 488                                         asm("sync");
 489                                         if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
 490                                             /* Resume Command, as per errata update */
 491                                             *addr = 0xD0D0D0D0;
 492                                             asm("sync");
 493                                         }
 494                                         /* re-enable interrupts if necessary */
 495                                         if (flag)
 496                                                 enable_interrupts();
 497                                         /* wait at least 80us - let's wait 1 ms */
 498                                         *addr = 0x70707070;
 499                                         udelay (1000);
 500                                         while ((*addr & ready) != ready) {
 501                                                 if((*addr & erase_err_status)==erase_err_status){
 502                                                         printf("Error in Block Erase - Lock Bit may be set!\n");
 503                                                         printf("Status Register = 0x%X\n", (uint)*addr);
 504                                                         *addr = 0xFFFFFFFF;     /* reset bank */
 505                                                         asm("sync");
 506                                                         return 1;
 507                                                 }
 508                                                 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 509                                                         printf ("Timeout\n");
 510                                                         *addr = 0xFFFFFFFF;     /* reset bank */
 511                                                         asm("sync");
 512                                                         return 1;
 513                                                 }
 514                                                 /* show that we're waiting */
 515                                                 if ((now - last) > 1000) {      /* every second */
 516                                                         putc ('.');
 517                                                         last = now;
 518                                                 }
 519                                         }
 520                                         /* reset to read mode */
 521                                         *addr = 0xFFFFFFFF;
 522                                         asm("sync");
 523                                         break;
 524                         }       /* end switch */
 525                 }               /* end if */
 526         }                       /* end for */
 527
 528         printf ("flash erase done\n");
 529         return 0;
 530 }
 531
 532 /*-----------------------------------------------------------------------
 533  * Copy memory to flash, returns:
 534  * 0 - OK
 535  * 1 - write timeout
 536  * 2 - Flash not erased
 537  */
 538
 539 #define FLASH_BLOCK_SIZE 32
 540
 541 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 542 {
 543         ulong cp, wp, data, count, temp;
 544 /*      ulong temp[FLASH_BLOCK_SIZE/4];*/
 545         int i, l, rc;
 546
 547         count = cnt;
 548         wp = (addr & ~3);       /* get lower word aligned address */
 549
 550         /*
 551          * handle unaligned start bytes
 552          */
 553         if ((l = addr - wp) != 0) {
 554                 data = 0;
 555                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 556                         data = (data << 8) | (*(uchar *)cp);
 557                 }
 558                 for (; i<4 && cnt>0; ++i) {
 559                         data = (data << 8) | *src++;
 560                         --cnt;
 561                         ++cp;
 562                 }
 563                 for (; cnt==0 && i<4; ++i, ++cp) {
 564                         data = (data << 8) | (*(uchar *)cp);
 565                 }
 566
 567                 if ((rc = write_word(info, wp, data)) != 0) {
 568                         return (rc);
 569                 }
 570                 wp += 4;
 571         }
 572
 573         cp = wp;
 574         /* handle unaligned block bytes , flash block size = 16bytes */
 575         wp = (cp+FLASH_BLOCK_SIZE-1) & ~(FLASH_BLOCK_SIZE-1);
 576         if ((wp-cp)>=cnt) {
 577                 if ((rc = write_block(info,src,cp,wp-cp)) !=0)
 578                         return (rc);
 579                 src += wp-cp;
 580                 cnt -= wp-cp;
 581         }
 582         /* handle aligned block bytes */
 583         temp = 0;
 584         printf("\n");
 585         while ( cnt >= FLASH_BLOCK_SIZE) {
 586                 if ((rc = write_block(info,src,cp,FLASH_BLOCK_SIZE)) !=0) {
 587                         return (rc);
 588                 }
 589                 src += FLASH_BLOCK_SIZE;
 590                 cp += FLASH_BLOCK_SIZE;
 591                 cnt -= FLASH_BLOCK_SIZE;
 592                 if (((count-cnt)>>10)>temp) {
 593                         temp=(count-cnt)>>10;
 594                         printf("\r%lu KB",temp);
 595                 }
 596         }
 597         printf("\n");
 598         wp = cp;
 599         /*
 600          * handle word aligned part
 601          */
 602         while (cnt >= 4) {
 603                 data = 0;
 604                 for (i=0; i<4; ++i) {
 605                         data = (data << 8) | *src++;
 606                 }
 607                 if ((rc = write_word(info, wp, data)) != 0) {
 608                         return (rc);
 609                 }
 610                 wp  += 4;
 611                 cnt -= 4;
 612         }
 613
 614         if (cnt == 0) {
 615                 return (0);
 616         }
 617
 618         /*
 619          * handle unaligned tail bytes
 620          */
 621         data = 0;
 622         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 623                 data = (data << 8) | *src++;
 624                 --cnt;
 625         }
 626         for (; i<4; ++i, ++cp) {
 627                 data = (data << 8) | (*(uchar *)cp);
 628         }
 629
 630         return (write_word(info, wp, data));
 631 }
 632 #undef FLASH_BLOCK_SIZE
 633
 634 /*-----------------------------------------------------------------------
 635  * Write block to Flash, returns:
 636  * 0 - OK
 637  * 1 - write timeout
 638  * 2 - Flash not erased
 639  * -1  Error
 640  */
 641 static int write_block(flash_info_t *info, uchar * src, ulong dest, ulong cnt)
 642 {
 643         vu_short *baddr, *addr = (vu_short *)dest;
 644         ushort data;
 645         ulong start, now, xsr,csr, ready;
 646         int flag;
 647
 648         if (cnt==0) return 0;
 649         else if(cnt != (cnt& ~1)) return -1;
 650
 651         /* Check if Flash is (sufficiently) erased */
 652         data = * src;
 653         data = (data<<8) | *(src+1);
 654         if ((*addr & data) != data) {
 655                 return (2);
 656         }
 657         if (big_endian == 1) {
 658                 ready = 0x0080;
 659         }
 660         else {
 661                 ready = 0x8000;
 662         }
 663         /* Disable interrupts which might cause a timeout here */
 664         flag = disable_interrupts();
 665
 666                 do {
 667                         /* Write Command */
 668                         *addr = 0xe8e8;
 669                         asm("sync");
 670                         xsr = *addr;
 671                         asm("sync");
 672                 } while (!(xsr & ready));       /*wait until read */
 673                 /*write count=BLOCK SIZE -1 */
 674                 data=(cnt>>1)-1;
 675                 data=(data<<8)|data;
 676                 *addr = data;           /* word mode, cnt/2 */
 677                 asm("sync");
 678                 baddr = addr;
 679                 while(cnt) {
 680                         data = * src++;
 681                         data = (data<<8) | *src++;
 682                         asm("sync");
 683                         *baddr = data;
 684                         asm("sync");
 685                         ++baddr;
 686                         cnt = cnt -2;
 687                 }
 688                 *addr = 0xd0d0;                 /* confirm write */
 689                 start = get_timer(0);
 690                 asm("sync");
 691                 if (flag)
 692                         enable_interrupts();
 693                 /* data polling for D7 */
 694                 flag  = 0;
 695                 while (((csr = *addr) & ready) != ready) {
 696                         if ((now=get_timer(start)) > CFG_FLASH_WRITE_TOUT) {
 697                                 flag = 1;
 698                                 break;
 699                         }
 700                 }
 701                 if (csr & 0x4040) {
 702                         printf ("CSR indicates write error (%04lx) at %08lx\n",
 703                                 csr, (ulong)addr);
 704                         flag = 1;
 705                 }
 706                 /* Clear Status Registers Command */
 707                 *addr = 0x5050;
 708                 asm("sync");
 709                 /* Reset to read array mode */
 710                 *addr = 0xFFFF;
 711                 asm("sync");
 712         return (flag);
 713 }
 714
 715
 716 /*-----------------------------------------------------------------------
 717  * Write a short word to Flash, returns:
 718  * 0 - OK
 719  * 1 - write timeout
 720  * 2 - Flash not erased
 721  */
 722 static int write_short (flash_info_t *info, ulong dest, ushort data)
 723 {
 724         vu_short *addr = (vu_short *)dest;
 725         ulong start, now, csr, ready;
 726         int flag;
 727
 728         /* Check if Flash is (sufficiently) erased */
 729         if ((*addr & data) != data) {
 730                 return (2);
 731         }
 732         /* Disable interrupts which might cause a timeout here */
 733         flag = disable_interrupts();
 734
 735                 /* Write Command */
 736                 *addr = 0x1010;
 737                 start = get_timer (0);
 738                 asm("sync");
 739                 /* Write Data */
 740                 *addr = data;
 741                 asm("sync");
 742                 /* re-enable interrupts if necessary */
 743                 if (flag)
 744                         enable_interrupts();
 745                 if (big_endian == 1) {
 746                         ready = 0x0080;
 747                 }
 748                 else {
 749                         ready = 0x8000;
 750                 }
 751                 /* data polling for D7 */
 752                 flag  = 0;
 753                 while (((csr = *addr) & ready) != ready) {
 754                         if ((now=get_timer(start)) > CFG_FLASH_WRITE_TOUT) {
 755                                 flag = 1;
 756                                 break;
 757                         }
 758                 }
 759                 if (csr & 0x4040) {
 760                         printf ("CSR indicates write error (%04lx) at %08lx\n",
 761                                 csr, (ulong)addr);
 762                         flag = 1;
 763                 }
 764                 /* Clear Status Registers Command */
 765                 *addr = 0x5050;
 766                 asm("sync");
 767                 /* Reset to read array mode */
 768                 *addr = 0xFFFF;
 769                 asm("sync");
 770         return (flag);
 771 }
 772
 773 /*-----------------------------------------------------------------------
 774  * Write a word to Flash, returns:
 775  * 0 - OK
 776  * 1 - write timeout
 777  * 2 - Flash not erased
 778  */
 779 static int write_word (flash_info_t *info, ulong dest, ulong data)
 780 {
 781         vu_long *addr = (vu_long *)dest;
 782         ulong start, csr, ready;
 783         int flag=0;
 784
 785         switch (info->portwidth) {
 786         case FLASH_CFI_32BIT:
 787                 /* Check if Flash is (sufficiently) erased */
 788                 if ((*addr & data) != data) {
 789                         return (2);
 790                 }
 791                 /* Disable interrupts which might cause a timeout here */
 792                 flag = disable_interrupts();
 793
 794                 if (big_endian == 1) {
 795                         ready = 0x0080;
 796                 }
 797                 else {
 798                         ready = 0x8000;
 799                 }
 800                 if ((info->portwidth / info->chipwidth)==2) {
 801                         ready += (ready <<16);
 802                 }
 803                 else {
 804                         ready = ready << 16;
 805                 }
 806                 /* Write Command */
 807                 *addr = 0x10101010;
 808                 asm("sync");
 809                 /* Write Data */
 810                 *addr = data;
 811                 /* re-enable interrupts if necessary */
 812                 if (flag)
 813                         enable_interrupts();
 814                 /* data polling for D7 */
 815                 start = get_timer (0);
 816                 flag  = 0;
 817                 while (((csr = *addr) & ready) != ready) {
 818                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 819                                 flag = 1;
 820                                 break;
 821                         }
 822                 }
 823                 if (csr & 0x40404040) {
 824                         printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
 825                         flag = 1;
 826                 }
 827                 /* Clear Status Registers Command */
 828                 *addr = 0x50505050;
 829                 asm("sync");
 830                 /* Reset to read array mode */
 831                 *addr = 0xFFFFFFFF;
 832                 asm("sync");
 833                 break;
 834         case FLASH_CFI_16BIT:
 835                 flag = write_short (info, dest,  (unsigned short) (data>>16));
 836                 if (flag == 0)
 837                         flag = write_short (info, dest+2,  (unsigned short) (data));
 838                 break;
 839         }
 840         return (flag);
 841 }
 842
 843 /*-----------------------------------------------------------------------
 844  * Clear Block Lock Bit, returns:
 845  * 0 - OK
 846  * 1 - Timeout
 847  */
 848
 849 static int clear_block_lock_bit(flash_info_t * info, vu_long  * addr)
 850 {
 851         ulong start, now, ready;
 852
 853         /* Reset Array */
 854         *addr = 0xffffffff;
 855         asm("sync");
 856         /* Clear Status Register */
 857         *addr = 0x50505050;
 858         asm("sync");
 859
 860         *addr = 0x60606060;
 861         asm("sync");
 862         *addr = 0xd0d0d0d0;
 863         asm("sync");
 864
 865
 866         if (big_endian == 1) {
 867                 ready = 0x0080;
 868         }
 869         else {
 870                 ready = 0x8000;
 871         }
 872         if ((info->portwidth / info->chipwidth)==2) {
 873                 ready += (ready <<16);
 874         }
 875         else {
 876                 ready = ready << 16;
 877         }
 878 #ifdef DEBUG
 879         printf ("%s: Ready flag is 0x%8lx\n", __FUNCTION__, ready);
 880 #endif
 881         *addr = 0x70707070;     /* read status */
 882         start = get_timer (0);
 883         while((*addr & ready) != ready){
 884                 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 885                         printf ("Timeout on clearing Block Lock Bit\n");
 886                         *addr = 0xFFFFFFFF;     /* reset bank */
 887                         asm("sync");
 888                         return 1;
 889                 }
 890         }
 891         return 0;
 892 }
 893
 894 #endif /* !CFG_NO_FLASH */