git.sur5r.net Git - u-boot/blob - board/tqm8xx/flash.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #if 0
  25 #define DEBUG
  26 #endif
  27
  28 #include <common.h>
  29 #include <mpc8xx.h>
  30 #include <environment.h>
  31
  32 #ifndef CFG_ENV_ADDR
  33 #define CFG_ENV_ADDR    (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  34 #endif
  35
  36 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  37
  38 /*-----------------------------------------------------------------------
  39  * Functions
  40  */
  41 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  42 static int write_word (flash_info_t *info, ulong dest, ulong data);
  43
  44 /*-----------------------------------------------------------------------
  45  */
  46
  47 unsigned long flash_init (void)
  48 {
  49         volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
  50         volatile memctl8xx_t *memctl = &immap->im_memctl;
  51         unsigned long size_b0, size_b1;
  52         int i;
  53
  54         /* Init: no FLASHes known */
  55         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  56                 flash_info[i].flash_id = FLASH_UNKNOWN;
  57         }
  58
  59         /* Static FLASH Bank configuration here - FIXME XXX */
  60
  61         debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
  62
  63         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  64
  65         debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM);
  66
  67         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  68                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  69                         size_b0, size_b0<<20);
  70         }
  71
  72         size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
  73
  74         debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
  75
  76         if (size_b1 > size_b0) {
  77                 printf ("## ERROR: "
  78                         "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
  79                         size_b1, size_b1<<20,
  80                         size_b0, size_b0<<20
  81                 );
  82                 flash_info[0].flash_id  = FLASH_UNKNOWN;
  83                 flash_info[1].flash_id  = FLASH_UNKNOWN;
  84                 flash_info[0].sector_count      = -1;
  85                 flash_info[1].sector_count      = -1;
  86                 flash_info[0].size              = 0;
  87                 flash_info[1].size              = 0;
  88                 return (0);
  89         }
  90
  91         debug  ("## Before remap: "
  92                 "BR0: 0x%08x    OR0: 0x%08x    "
  93                 "BR1: 0x%08x    OR1: 0x%08x\n",
  94                 memctl->memc_br0, memctl->memc_or0,
  95                 memctl->memc_br1, memctl->memc_or1);
  96
  97         /* Remap FLASH according to real size */
  98         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
  99         memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
 100
 101         debug ("## BR0: 0x%08x    OR0: 0x%08x\n",
 102                 memctl->memc_br0, memctl->memc_or0);
 103
 104         /* Re-do sizing to get full correct info */
 105         size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
 106
 107 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 108         /* monitor protection ON by default */
 109         debug ("Protect monitor: %08lx ... %08lx\n",
 110                 (ulong)CFG_MONITOR_BASE,
 111                 (ulong)CFG_MONITOR_BASE + monitor_flash_len - 1);
 112
 113         flash_protect(FLAG_PROTECT_SET,
 114                       CFG_MONITOR_BASE,
 115                       CFG_MONITOR_BASE + monitor_flash_len - 1,
 116                       &flash_info[0]);
 117 #endif
 118
 119 #ifdef  CFG_ENV_IS_IN_FLASH
 120         /* ENV protection ON by default */
 121 # ifdef CFG_ENV_ADDR_REDUND
 122         debug ("Protect primary   environment: %08lx ... %08lx\n",
 123                 (ulong)CFG_ENV_ADDR,
 124                 (ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
 125 # else
 126         debug ("Protect environment: %08lx ... %08lx\n",
 127                 (ulong)CFG_ENV_ADDR,
 128                 (ulong)CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1);
 129 # endif
 130
 131         flash_protect(FLAG_PROTECT_SET,
 132                       CFG_ENV_ADDR,
 133                       CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
 134                       &flash_info[0]);
 135 #endif
 136
 137 #ifdef CFG_ENV_ADDR_REDUND
 138         debug ("Protect redundand environment: %08lx ... %08lx\n",
 139                 (ulong)CFG_ENV_ADDR_REDUND,
 140                 (ulong)CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1);
 141
 142         flash_protect(FLAG_PROTECT_SET,
 143                       CFG_ENV_ADDR_REDUND,
 144                       CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
 145                       &flash_info[0]);
 146 #endif
 147
 148         if (size_b1) {
 149                 memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
 150                 memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
 151                                     BR_MS_GPCM | BR_V;
 152
 153                 debug ("## BR1: 0x%08x    OR1: 0x%08x\n",
 154                         memctl->memc_br1, memctl->memc_or1);
 155
 156                 /* Re-do sizing to get full correct info */
 157                 size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
 158                                           &flash_info[1]);
 159
 160 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 161                 /* monitor protection ON by default */
 162                 flash_protect(FLAG_PROTECT_SET,
 163                               CFG_MONITOR_BASE,
 164                               CFG_MONITOR_BASE+monitor_flash_len-1,
 165                               &flash_info[1]);
 166 #endif
 167
 168 #ifdef  CFG_ENV_IS_IN_FLASH
 169                 /* ENV protection ON by default */
 170                 flash_protect(FLAG_PROTECT_SET,
 171                               CFG_ENV_ADDR,
 172                               CFG_ENV_ADDR+CFG_ENV_SIZE-1,
 173                               &flash_info[1]);
 174 #endif
 175         } else {
 176                 memctl->memc_br1 = 0;           /* invalidate bank */
 177
 178                 flash_info[1].flash_id = FLASH_UNKNOWN;
 179                 flash_info[1].sector_count = -1;
 180                 flash_info[1].size = 0;
 181
 182                 debug ("## DISABLE BR1: 0x%08x    OR1: 0x%08x\n",
 183                         memctl->memc_br1, memctl->memc_or1);
 184         }
 185
 186         debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
 187
 188         flash_info[0].size = size_b0;
 189         flash_info[1].size = size_b1;
 190
 191         return (size_b0 + size_b1);
 192 }
 193
 194 /*-----------------------------------------------------------------------
 195  */
 196 void flash_print_info  (flash_info_t *info)
 197 {
 198         int i;
 199
 200         if (info->flash_id == FLASH_UNKNOWN) {
 201                 printf ("missing or unknown FLASH type\n");
 202                 return;
 203         }
 204
 205         switch (info->flash_id & FLASH_VENDMASK) {
 206         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 207         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 208         default:                printf ("Unknown Vendor ");     break;
 209         }
 210
 211         switch (info->flash_id & FLASH_TYPEMASK) {
 212 #ifdef CONFIG_TQM8xxM   /* mirror bit flash */
 213         case FLASH_AMLV128U:    printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
 214                                 break;
 215         case FLASH_AMLV320U:    printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
 216                                 break;
 217         case FLASH_AMLV640U:    printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
 218                                 break;
 219         case FLASH_AMLV320B:    printf ("AM29LV320MB (32Mbit, bottom boot sect)\n");
 220                                 break;
 221 # else  /* ! TQM8xxM */
 222         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 223                                 break;
 224         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 225                                 break;
 226         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 227                                 break;
 228         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 229                                 break;
 230         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 231                                 break;
 232         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 233                                 break;
 234 #endif  /* TQM8xxM */
 235         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 236                                 break;
 237         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 238                                 break;
 239         case FLASH_AMDL163B:    printf ("AM29DL163B (16 Mbit, bottom boot sect)\n");
 240                                 break;
 241         default:                printf ("Unknown Chip Type\n");
 242                                 break;
 243         }
 244
 245         printf ("  Size: %ld MB in %d Sectors\n",
 246                 info->size >> 20, info->sector_count);
 247
 248         printf ("  Sector Start Addresses:");
 249         for (i=0; i<info->sector_count; ++i) {
 250                 if ((i % 5) == 0)
 251                         printf ("\n   ");
 252                 printf (" %08lX%s",
 253                         info->start[i],
 254                         info->protect[i] ? " (RO)" : "     "
 255                 );
 256         }
 257         printf ("\n");
 258         return;
 259 }
 260
 261 /*-----------------------------------------------------------------------
 262  */
 263
 264
 265 /*-----------------------------------------------------------------------
 266  */
 267
 268 /*
 269  * The following code cannot be run from FLASH!
 270  */
 271
 272 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 273 {
 274         short i;
 275         ulong value;
 276         ulong base = (ulong)addr;
 277
 278         /* Write auto select command: read Manufacturer ID */
 279         addr[0x0555] = 0x00AA00AA;
 280         addr[0x02AA] = 0x00550055;
 281         addr[0x0555] = 0x00900090;
 282
 283         value = addr[0];
 284
 285         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 286
 287         switch (value) {
 288         case AMD_MANUFACT:
 289                 debug ("Manufacturer: AMD\n");
 290                 info->flash_id = FLASH_MAN_AMD;
 291                 break;
 292         case FUJ_MANUFACT:
 293                 debug ("Manufacturer: FUJITSU\n");
 294                 info->flash_id = FLASH_MAN_FUJ;
 295                 break;
 296         default:
 297                 debug ("Manufacturer: *** unknown ***\n");
 298                 info->flash_id = FLASH_UNKNOWN;
 299                 info->sector_count = 0;
 300                 info->size = 0;
 301                 return (0);                     /* no or unknown flash  */
 302         }
 303
 304         value = addr[1];                        /* device ID            */
 305
 306         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 307
 308         switch (value) {
 309 #ifdef CONFIG_TQM8xxM   /* mirror bit flash */
 310         case AMD_ID_MIRROR:
 311                 debug ("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 312                         addr[14], addr[15]);
 313                 /* Special case for AMLV320MH/L */
 314                 if ((addr[14] & 0x00ff00ff) == 0x001d001d &&
 315                     (addr[15] & 0x00ff00ff) == 0x00000000) {
 316                         debug ("Chip: AMLV320MH/L\n");
 317                         info->flash_id += FLASH_AMLV320U;
 318                         info->sector_count = 64;
 319                         info->size = 0x00800000;        /* => 8 MB */
 320                         break;
 321                 }
 322                 switch(addr[14]) {
 323                 case AMD_ID_LV128U_2:
 324                         if (addr[15] != AMD_ID_LV128U_3) {
 325                                 debug ("Chip: AMLV128U -> unknown\n");
 326                                 info->flash_id = FLASH_UNKNOWN;
 327                         } else {
 328                                 debug ("Chip: AMLV128U\n");
 329                                 info->flash_id += FLASH_AMLV128U;
 330                                 info->sector_count = 256;
 331                                 info->size = 0x02000000;
 332                         }
 333                         break;                          /* => 32 MB     */
 334                 case AMD_ID_LV640U_2:
 335                         if (addr[15] != AMD_ID_LV640U_3) {
 336                                 debug ("Chip: AMLV640U -> unknown\n");
 337                                 info->flash_id = FLASH_UNKNOWN;
 338                         } else {
 339                                 debug ("Chip: AMLV640U\n");
 340                                 info->flash_id += FLASH_AMLV640U;
 341                                 info->sector_count = 128;
 342                                 info->size = 0x01000000;
 343                         }
 344                         break;                          /* => 16 MB     */
 345                 case AMD_ID_LV320B_2:
 346                         if (addr[15] != AMD_ID_LV320B_3) {
 347                                 debug ("Chip: AMLV320B -> unknown\n");
 348                                 info->flash_id = FLASH_UNKNOWN;
 349                         } else {
 350                                 debug ("Chip: AMLV320B\n");
 351                                 info->flash_id += FLASH_AMLV320B;
 352                                 info->sector_count = 71;
 353                                 info->size = 0x00800000;
 354                         }
 355                         break;                          /* =>  8 MB     */
 356                 default:
 357                         debug ("Chip: *** unknown ***\n");
 358                         info->flash_id = FLASH_UNKNOWN;
 359                         break;
 360                 }
 361                 break;
 362 # else  /* ! TQM8xxM */
 363         case AMD_ID_LV400T:
 364                 info->flash_id += FLASH_AM400T;
 365                 info->sector_count = 11;
 366                 info->size = 0x00100000;
 367                 break;                                  /* => 1 MB              */
 368
 369         case AMD_ID_LV400B:
 370                 info->flash_id += FLASH_AM400B;
 371                 info->sector_count = 11;
 372                 info->size = 0x00100000;
 373                 break;                                  /* => 1 MB              */
 374
 375         case AMD_ID_LV800T:
 376                 info->flash_id += FLASH_AM800T;
 377                 info->sector_count = 19;
 378                 info->size = 0x00200000;
 379                 break;                                  /* => 2 MB      */
 380
 381         case AMD_ID_LV800B:
 382                 info->flash_id += FLASH_AM800B;
 383                 info->sector_count = 19;
 384                 info->size = 0x00200000;
 385                 break;                                  /* => 2 MB      */
 386
 387         case AMD_ID_LV320T:
 388                 info->flash_id += FLASH_AM320T;
 389                 info->sector_count = 71;
 390                 info->size = 0x00800000;
 391                 break;                                  /* => 8 MB      */
 392
 393         case AMD_ID_LV320B:
 394                 info->flash_id += FLASH_AM320B;
 395                 info->sector_count = 71;
 396                 info->size = 0x00800000;
 397                 break;                                  /* => 8 MB      */
 398 #endif  /* TQM8xxM */
 399
 400         case AMD_ID_LV160T:
 401                 info->flash_id += FLASH_AM160T;
 402                 info->sector_count = 35;
 403                 info->size = 0x00400000;
 404                 break;                                  /* => 4 MB      */
 405
 406         case AMD_ID_LV160B:
 407                 info->flash_id += FLASH_AM160B;
 408                 info->sector_count = 35;
 409                 info->size = 0x00400000;
 410                 break;                                  /* => 4 MB      */
 411
 412         case AMD_ID_DL163B:
 413                 info->flash_id += FLASH_AMDL163B;
 414                 info->sector_count = 39;
 415                 info->size = 0x00400000;
 416                 break;                                  /* => 4 MB      */
 417
 418         default:
 419                 info->flash_id = FLASH_UNKNOWN;
 420                 return (0);                     /* => no or unknown flash */
 421         }
 422
 423         /* set up sector start address table */
 424         switch (value) {
 425 #ifdef CONFIG_TQM8xxM   /* mirror bit flash */
 426         case AMD_ID_MIRROR:
 427                 switch (info->flash_id & FLASH_TYPEMASK) {
 428                         /* only known types here - no default */
 429                 case FLASH_AMLV128U:
 430                 case FLASH_AMLV640U:
 431                 case FLASH_AMLV320U:
 432                         for (i = 0; i < info->sector_count; i++) {
 433                                 info->start[i] = base;
 434                                 base += 0x20000;
 435                         }
 436                         break;
 437                 case FLASH_AMLV320B:
 438                         for (i = 0; i < info->sector_count; i++) {
 439                                 info->start[i] = base;
 440                                 /*
 441                                  * The first 8 sectors are 8 kB,
 442                                  * all the other ones  are 64 kB
 443                                  */
 444                                 base += (i < 8)
 445                                         ?  2 * ( 8 << 10)
 446                                         :  2 * (64 << 10);
 447                         }
 448                         break;
 449                 }
 450                 break;
 451 # else  /* ! TQM8xxM */
 452         case AMD_ID_LV400B:
 453         case AMD_ID_LV800B:
 454                 /* set sector offsets for bottom boot block type        */
 455                 info->start[0] = base + 0x00000000;
 456                 info->start[1] = base + 0x00008000;
 457                 info->start[2] = base + 0x0000C000;
 458                 info->start[3] = base + 0x00010000;
 459                 for (i = 4; i < info->sector_count; i++) {
 460                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 461                 }
 462                 break;
 463         case AMD_ID_LV400T:
 464         case AMD_ID_LV800T:
 465                 /* set sector offsets for top boot block type           */
 466                 i = info->sector_count - 1;
 467                 info->start[i--] = base + info->size - 0x00008000;
 468                 info->start[i--] = base + info->size - 0x0000C000;
 469                 info->start[i--] = base + info->size - 0x00010000;
 470                 for (; i >= 0; i--) {
 471                         info->start[i] = base + i * 0x00020000;
 472                 }
 473                 break;
 474         case AMD_ID_LV320B:
 475                 for (i = 0; i < info->sector_count; i++) {
 476                         info->start[i] = base;
 477                         /*
 478                          * The first 8 sectors are 8 kB,
 479                          * all the other ones  are 64 kB
 480                          */
 481                         base += (i < 8)
 482                                 ?  2 * ( 8 << 10)
 483                                 :  2 * (64 << 10);
 484                 }
 485                 break;
 486         case AMD_ID_LV320T:
 487                 for (i = 0; i < info->sector_count; i++) {
 488                         info->start[i] = base;
 489                         /*
 490                          * The last 8 sectors are 8 kB,
 491                          * all the other ones  are 64 kB
 492                          */
 493                         base += (i < (info->sector_count - 8))
 494                                 ?  2 * (64 << 10)
 495                                 :  2 * ( 8 << 10);
 496                 }
 497                 break;
 498 #endif  /* TQM8xxM */
 499         case AMD_ID_LV160B:
 500                 /* set sector offsets for bottom boot block type        */
 501                 info->start[0] = base + 0x00000000;
 502                 info->start[1] = base + 0x00008000;
 503                 info->start[2] = base + 0x0000C000;
 504                 info->start[3] = base + 0x00010000;
 505                 for (i = 4; i < info->sector_count; i++) {
 506                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 507                 }
 508                 break;
 509         case AMD_ID_LV160T:
 510                 /* set sector offsets for top boot block type           */
 511                 i = info->sector_count - 1;
 512                 info->start[i--] = base + info->size - 0x00008000;
 513                 info->start[i--] = base + info->size - 0x0000C000;
 514                 info->start[i--] = base + info->size - 0x00010000;
 515                 for (; i >= 0; i--) {
 516                         info->start[i] = base + i * 0x00020000;
 517                 }
 518                 break;
 519         case AMD_ID_DL163B:
 520                 for (i = 0; i < info->sector_count; i++) {
 521                         info->start[i] = base;
 522                         /*
 523                          * The first 8 sectors are 8 kB,
 524                          * all the other ones  are 64 kB
 525                          */
 526                         base += (i < 8)
 527                                 ?  2 * ( 8 << 10)
 528                                 :  2 * (64 << 10);
 529                 }
 530                 break;
 531         default:
 532                 return (0);
 533                 break;
 534         }
 535
 536 #if 0
 537         /* check for protected sectors */
 538         for (i = 0; i < info->sector_count; i++) {
 539                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 540                 /* D0 = 1 if protected */
 541                 addr = (volatile unsigned long *)(info->start[i]);
 542                 info->protect[i] = addr[2] & 1;
 543         }
 544 #endif
 545
 546         /*
 547          * Prevent writes to uninitialized FLASH.
 548          */
 549         if (info->flash_id != FLASH_UNKNOWN) {
 550                 addr = (volatile unsigned long *)info->start[0];
 551
 552                 *addr = 0x00F000F0;     /* reset bank */
 553         }
 554
 555         return (info->size);
 556 }
 557
 558
 559 /*-----------------------------------------------------------------------
 560  */
 561
 562 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 563 {
 564         vu_long *addr = (vu_long*)(info->start[0]);
 565         int flag, prot, sect, l_sect;
 566         ulong start, now, last;
 567
 568         debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
 569
 570         if ((s_first < 0) || (s_first > s_last)) {
 571                 if (info->flash_id == FLASH_UNKNOWN) {
 572                         printf ("- missing\n");
 573                 } else {
 574                         printf ("- no sectors to erase\n");
 575                 }
 576                 return 1;
 577         }
 578
 579         if ((info->flash_id == FLASH_UNKNOWN) ||
 580             (info->flash_id > FLASH_AMD_COMP)) {
 581                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 582                         info->flash_id);
 583                 return 1;
 584         }
 585
 586         prot = 0;
 587         for (sect=s_first; sect<=s_last; ++sect) {
 588                 if (info->protect[sect]) {
 589                         prot++;
 590                 }
 591         }
 592
 593         if (prot) {
 594                 printf ("- Warning: %d protected sectors will not be erased!\n",
 595                         prot);
 596         } else {
 597                 printf ("\n");
 598         }
 599
 600         l_sect = -1;
 601
 602         /* Disable interrupts which might cause a timeout here */
 603         flag = disable_interrupts();
 604
 605         addr[0x0555] = 0x00AA00AA;
 606         addr[0x02AA] = 0x00550055;
 607         addr[0x0555] = 0x00800080;
 608         addr[0x0555] = 0x00AA00AA;
 609         addr[0x02AA] = 0x00550055;
 610
 611         /* Start erase on unprotected sectors */
 612         for (sect = s_first; sect<=s_last; sect++) {
 613                 if (info->protect[sect] == 0) { /* not protected */
 614                         addr = (vu_long*)(info->start[sect]);
 615                         addr[0] = 0x00300030;
 616                         l_sect = sect;
 617                 }
 618         }
 619
 620         /* re-enable interrupts if necessary */
 621         if (flag)
 622                 enable_interrupts();
 623
 624         /* wait at least 80us - let's wait 1 ms */
 625         udelay (1000);
 626
 627         /*
 628          * We wait for the last triggered sector
 629          */
 630         if (l_sect < 0)
 631                 goto DONE;
 632
 633         start = get_timer (0);
 634         last  = start;
 635         addr = (vu_long*)(info->start[l_sect]);
 636         while ((addr[0] & 0x00800080) != 0x00800080) {
 637                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 638                         printf ("Timeout\n");
 639                         return 1;
 640                 }
 641                 /* show that we're waiting */
 642                 if ((now - last) > 1000) {      /* every second */
 643                         putc ('.');
 644                         last = now;
 645                 }
 646         }
 647
 648 DONE:
 649         /* reset to read mode */
 650         addr = (volatile unsigned long *)info->start[0];
 651         addr[0] = 0x00F000F0;   /* reset bank */
 652
 653         printf (" done\n");
 654         return 0;
 655 }
 656
 657 /*-----------------------------------------------------------------------
 658  * Copy memory to flash, returns:
 659  * 0 - OK
 660  * 1 - write timeout
 661  * 2 - Flash not erased
 662  */
 663
 664 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 665 {
 666         ulong cp, wp, data;
 667         int i, l, rc;
 668
 669         wp = (addr & ~3);       /* get lower word aligned address */
 670
 671         /*
 672          * handle unaligned start bytes
 673          */
 674         if ((l = addr - wp) != 0) {
 675                 data = 0;
 676                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 677                         data = (data << 8) | (*(uchar *)cp);
 678                 }
 679                 for (; i<4 && cnt>0; ++i) {
 680                         data = (data << 8) | *src++;
 681                         --cnt;
 682                         ++cp;
 683                 }
 684                 for (; cnt==0 && i<4; ++i, ++cp) {
 685                         data = (data << 8) | (*(uchar *)cp);
 686                 }
 687
 688                 if ((rc = write_word(info, wp, data)) != 0) {
 689                         return (rc);
 690                 }
 691                 wp += 4;
 692         }
 693
 694         /*
 695          * handle word aligned part
 696          */
 697         while (cnt >= 4) {
 698                 data = 0;
 699                 for (i=0; i<4; ++i) {
 700                         data = (data << 8) | *src++;
 701                 }
 702                 if ((rc = write_word(info, wp, data)) != 0) {
 703                         return (rc);
 704                 }
 705                 wp  += 4;
 706                 cnt -= 4;
 707         }
 708
 709         if (cnt == 0) {
 710                 return (0);
 711         }
 712
 713         /*
 714          * handle unaligned tail bytes
 715          */
 716         data = 0;
 717         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 718                 data = (data << 8) | *src++;
 719                 --cnt;
 720         }
 721         for (; i<4; ++i, ++cp) {
 722                 data = (data << 8) | (*(uchar *)cp);
 723         }
 724
 725         return (write_word(info, wp, data));
 726 }
 727
 728 /*-----------------------------------------------------------------------
 729  * Write a word to Flash, returns:
 730  * 0 - OK
 731  * 1 - write timeout
 732  * 2 - Flash not erased
 733  */
 734 static int write_word (flash_info_t *info, ulong dest, ulong data)
 735 {
 736         vu_long *addr = (vu_long*)(info->start[0]);
 737         ulong start;
 738         int flag;
 739
 740         /* Check if Flash is (sufficiently) erased */
 741         if ((*((vu_long *)dest) & data) != data) {
 742                 return (2);
 743         }
 744         /* Disable interrupts which might cause a timeout here */
 745         flag = disable_interrupts();
 746
 747         addr[0x0555] = 0x00AA00AA;
 748         addr[0x02AA] = 0x00550055;
 749         addr[0x0555] = 0x00A000A0;
 750
 751         *((vu_long *)dest) = data;
 752
 753         /* re-enable interrupts if necessary */
 754         if (flag)
 755                 enable_interrupts();
 756
 757         /* data polling for D7 */
 758         start = get_timer (0);
 759         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 760                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 761                         return (1);
 762                 }
 763         }
 764         return (0);
 765 }
 766
 767 /*-----------------------------------------------------------------------
 768  */