board/tqc/tqm5200/cam5200_flash.c

   1 /*
   2  * (C) Copyright 2006
   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 #include <common.h>
  25 #include <mpc5xxx.h>
  26 #include <asm/processor.h>
  27
  28 #if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH)
  29
  30 #if 0
  31 #define DEBUGF(x...) printf(x)
  32 #else
  33 #define DEBUGF(x...)
  34 #endif
  35
  36 #define swap16(x) __swab16(x)
  37
  38 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips */
  39
  40 /*
  41  * CAM5200 is a TQM5200B based board. Additionally it also features
  42  * a NIOS cpu. The NIOS CPU peripherals are accessible through MPC5xxx
  43  * Local Bus on CS5. This includes 32 bit wide RAM and SRAM as well as
  44  * 16 bit wide flash device. Big Endian order on a 32 bit CS5 makes
  45  * access to flash chip slightly more complicated as additional byte
  46  * swapping is necessary within each 16 bit wide flash 'word'.
  47  *
  48  * This driver's task is to handle both flash devices: 32 bit TQM5200B
  49  * flash chip and 16 bit NIOS cpu flash chip. In the below
  50  * flash_addr_table table we use least significant address bit to mark
  51  * 16 bit flash bank and two sets of routines *_32 and *_16 to handle
  52  * specifics of both flashes.
  53  */
  54 static unsigned long flash_addr_table[][CFG_MAX_FLASH_BANKS] = {
  55         {CFG_BOOTCS_START, CFG_CS5_START | 1}
  56 };
  57
  58 /*-----------------------------------------------------------------------
  59  * Functions
  60  */
  61 static int write_word(flash_info_t * info, ulong dest, ulong data);
  62 #ifdef CFG_FLASH_2ND_16BIT_DEV
  63 static int write_word_32(flash_info_t * info, ulong dest, ulong data);
  64 static int write_word_16(flash_info_t * info, ulong dest, ulong data);
  65 static int flash_erase_32(flash_info_t * info, int s_first, int s_last);
  66 static int flash_erase_16(flash_info_t * info, int s_first, int s_last);
  67 static ulong flash_get_size_32(vu_long * addr, flash_info_t * info);
  68 static ulong flash_get_size_16(vu_long * addr, flash_info_t * info);
  69 #endif
  70
  71 void flash_print_info(flash_info_t * info)
  72 {
  73         int i, k;
  74         int size, erased;
  75         volatile unsigned long *flash;
  76
  77         if (info->flash_id == FLASH_UNKNOWN) {
  78                 printf("missing or unknown FLASH type\n");
  79                 return;
  80         }
  81
  82         switch (info->flash_id & FLASH_VENDMASK) {
  83                 case FLASH_MAN_AMD:
  84                         printf("AMD ");
  85                         break;
  86                 case FLASH_MAN_FUJ:
  87                         printf("FUJITSU ");
  88                         break;
  89                 default:
  90                         printf("Unknown Vendor ");
  91                         break;
  92         }
  93
  94         switch (info->flash_id & FLASH_TYPEMASK) {
  95                 case FLASH_S29GL128N:
  96                         printf ("S29GL128N (256 Mbit, uniform sector size)\n");
  97                         break;
  98                 case FLASH_AM320B:
  99                         printf ("29LV320B (32 Mbit, bottom boot sect)\n");
 100                         break;
 101                 case FLASH_AM320T:
 102                         printf ("29LV320T (32 Mbit, top boot sect)\n");
 103                         break;
 104                 default:
 105                         printf("Unknown Chip Type\n");
 106                         break;
 107         }
 108
 109         printf("  Size: %ld KB in %d Sectors\n",
 110                         info->size >> 10, info->sector_count);
 111
 112         printf("  Sector Start Addresses:");
 113         for (i = 0; i < info->sector_count; ++i) {
 114                 /*
 115                  * Check if whole sector is erased
 116                  */
 117                 if (i != (info->sector_count - 1))
 118                         size = info->start[i + 1] - info->start[i];
 119                 else
 120                         size = info->start[0] + info->size - info->start[i];
 121
 122                 erased = 1;
 123                 flash = (volatile unsigned long *)info->start[i];
 124                 size = size >> 2;       /* divide by 4 for longword access */
 125
 126                 for (k = 0; k < size; k++) {
 127                         if (*flash++ != 0xffffffff) {
 128                                 erased = 0;
 129                                 break;
 130                         }
 131                 }
 132
 133                 if ((i % 5) == 0)
 134                         printf("\n   ");
 135
 136                 printf(" %08lX%s%s", info->start[i],
 137                                 erased ? " E" : "  ",
 138                                 info->protect[i] ? "RO " : "   ");
 139         }
 140         printf("\n");
 141         return;
 142 }
 143
 144
 145 /*
 146  * The following code cannot be run from FLASH!
 147  */
 148 #ifdef CFG_FLASH_2ND_16BIT_DEV
 149 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 150 {
 151
 152         DEBUGF("get_size: FLASH ADDR %08lx\n", addr);
 153
 154         /* bit 0 used for big flash marking */
 155         if ((ulong)addr & 0x1)
 156                 return flash_get_size_16((vu_long *)((ulong)addr & 0xfffffffe), info);
 157         else
 158                 return flash_get_size_32(addr, info);
 159 }
 160
 161 static ulong flash_get_size_32(vu_long * addr, flash_info_t * info)
 162 #else
 163 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 164 #endif
 165 {
 166         short i;
 167         CFG_FLASH_WORD_SIZE value;
 168         ulong base = (ulong) addr;
 169         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
 170
 171         DEBUGF("get_size32: FLASH ADDR: %08x\n", (unsigned)addr);
 172
 173         /* Write auto select command: read Manufacturer ID */
 174         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 175         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 176         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
 177         udelay(1000);
 178
 179         value = addr2[0];
 180         DEBUGF("FLASH MANUFACT: %x\n", value);
 181
 182         switch (value) {
 183                 case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 184                         info->flash_id = FLASH_MAN_AMD;
 185                         break;
 186                 default:
 187                         info->flash_id = FLASH_UNKNOWN;
 188                         info->sector_count = 0;
 189                         info->size = 0;
 190                         return (0);     /* no or unknown flash  */
 191         }
 192
 193         value = addr2[1];       /* device ID            */
 194         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 195
 196         switch (value) {
 197                 case AMD_ID_MIRROR:
 198                         DEBUGF("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 199                                         addr[14], addr[15]);
 200                         switch(addr[14]) {
 201                                 case AMD_ID_GL128N_2:
 202                                         if (addr[15] != AMD_ID_GL128N_3) {
 203                                                 DEBUGF("Chip: S29GL128N -> unknown\n");
 204                                                 info->flash_id = FLASH_UNKNOWN;
 205                                         } else {
 206                                                 DEBUGF("Chip: S29GL128N\n");
 207                                                 info->flash_id += FLASH_S29GL128N;
 208                                                 info->sector_count = 128;
 209                                                 info->size = 0x02000000;
 210                                         }
 211                                         break;
 212                                 default:
 213                                         info->flash_id = FLASH_UNKNOWN;
 214                                         return(0);
 215                         }
 216                         break;
 217
 218                 default:
 219                         info->flash_id = FLASH_UNKNOWN;
 220                         return (0);     /* => no or unknown flash */
 221         }
 222
 223         /* set up sector start address table */
 224         for (i = 0; i < info->sector_count; i++)
 225                 info->start[i] = base + (i * 0x00040000);
 226
 227         /* check for protected sectors */
 228         for (i = 0; i < info->sector_count; i++) {
 229                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 230                 /* D0 = 1 if protected */
 231                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 232
 233                 info->protect[i] = addr2[2] & 1;
 234         }
 235
 236         /* issue bank reset to return to read mode */
 237         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
 238
 239         return (info->size);
 240 }
 241
 242 static int wait_for_DQ7_32(flash_info_t * info, int sect)
 243 {
 244         ulong start, now, last;
 245         volatile CFG_FLASH_WORD_SIZE *addr =
 246                 (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 247
 248         start = get_timer(0);
 249         last = start;
 250         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 251                         (CFG_FLASH_WORD_SIZE) 0x00800080) {
 252                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 253                         printf("Timeout\n");
 254                         return -1;
 255                 }
 256                 /* show that we're waiting */
 257                 if ((now - last) > 1000) {      /* every second */
 258                         putc('.');
 259                         last = now;
 260                 }
 261         }
 262         return 0;
 263 }
 264
 265 #ifdef CFG_FLASH_2ND_16BIT_DEV
 266 int flash_erase(flash_info_t * info, int s_first, int s_last)
 267 {
 268         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
 269                 return flash_erase_16(info, s_first, s_last);
 270         } else {
 271                 return flash_erase_32(info, s_first, s_last);
 272         }
 273 }
 274
 275 static int flash_erase_32(flash_info_t * info, int s_first, int s_last)
 276 #else
 277 int flash_erase(flash_info_t * info, int s_first, int s_last)
 278 #endif
 279 {
 280         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 281         volatile CFG_FLASH_WORD_SIZE *addr2;
 282         int flag, prot, sect, l_sect;
 283
 284         if ((s_first < 0) || (s_first > s_last)) {
 285                 if (info->flash_id == FLASH_UNKNOWN)
 286                         printf("- missing\n");
 287                 else
 288                         printf("- no sectors to erase\n");
 289                 return 1;
 290         }
 291
 292         if (info->flash_id == FLASH_UNKNOWN) {
 293                 printf("Can't erase unknown flash type - aborted\n");
 294                 return 1;
 295         }
 296
 297         prot = 0;
 298         for (sect = s_first; sect <= s_last; ++sect) {
 299                 if (info->protect[sect])
 300                         prot++;
 301         }
 302
 303         if (prot)
 304                 printf("- Warning: %d protected sectors will not be erased!", prot);
 305
 306         printf("\n");
 307
 308         l_sect = -1;
 309
 310         /* Disable interrupts which might cause a timeout here */
 311         flag = disable_interrupts();
 312
 313         /* Start erase on unprotected sectors */
 314         for (sect = s_first; sect <= s_last; sect++) {
 315                 if (info->protect[sect] == 0) { /* not protected */
 316                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 317
 318                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 319                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 320                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 321                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 322                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 323                         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
 324
 325                         l_sect = sect;
 326                         /*
 327                          * Wait for each sector to complete, it's more
 328                          * reliable.  According to AMD Spec, you must
 329                          * issue all erase commands within a specified
 330                          * timeout.  This has been seen to fail, especially
 331                          * if printf()s are included (for debug)!!
 332                          */
 333                         wait_for_DQ7_32(info, sect);
 334                 }
 335         }
 336
 337         /* re-enable interrupts if necessary */
 338         if (flag)
 339                 enable_interrupts();
 340
 341         /* wait at least 80us - let's wait 1 ms */
 342         udelay(1000);
 343
 344         /* reset to read mode */
 345         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 346         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
 347
 348         printf(" done\n");
 349         return 0;
 350 }
 351
 352 /*-----------------------------------------------------------------------
 353  * Copy memory to flash, returns:
 354  * 0 - OK
 355  * 1 - write timeout
 356  * 2 - Flash not erased
 357  */
 358 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 359 {
 360         ulong cp, wp, data;
 361         int i, l, rc;
 362
 363         wp = (addr & ~3);       /* get lower word aligned address */
 364
 365         /*
 366          * handle unaligned start bytes
 367          */
 368         if ((l = addr - wp) != 0) {
 369                 data = 0;
 370                 for (i = 0, cp = wp; i < l; ++i, ++cp)
 371                         data = (data << 8) | (*(uchar *) cp);
 372
 373                 for (; i < 4 && cnt > 0; ++i) {
 374                         data = (data << 8) | *src++;
 375                         --cnt;
 376                         ++cp;
 377                 }
 378
 379                 for (; cnt == 0 && i < 4; ++i, ++cp)
 380                         data = (data << 8) | (*(uchar *) cp);
 381
 382                 if ((rc = write_word(info, wp, data)) != 0)
 383                         return (rc);
 384
 385                 wp += 4;
 386         }
 387
 388         /*
 389          * handle word aligned part
 390          */
 391         while (cnt >= 4) {
 392                 data = 0;
 393                 for (i = 0; i < 4; ++i)
 394                         data = (data << 8) | *src++;
 395
 396                 if ((rc = write_word(info, wp, data)) != 0)
 397                         return (rc);
 398
 399                 wp += 4;
 400                 cnt -= 4;
 401         }
 402
 403         if (cnt == 0)
 404                 return (0);
 405
 406         /*
 407          * handle unaligned tail bytes
 408          */
 409         data = 0;
 410         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 411                 data = (data << 8) | *src++;
 412                 --cnt;
 413         }
 414         for (; i < 4; ++i, ++cp)
 415                 data = (data << 8) | (*(uchar *) cp);
 416
 417         return (write_word(info, wp, data));
 418 }
 419
 420 /*-----------------------------------------------------------------------
 421  * Copy memory to flash, returns:
 422  * 0 - OK
 423  * 1 - write timeout
 424  * 2 - Flash not erased
 425  */
 426 #ifdef CFG_FLASH_2ND_16BIT_DEV
 427 static int write_word(flash_info_t * info, ulong dest, ulong data)
 428 {
 429         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
 430                 return write_word_16(info, dest, data);
 431         } else {
 432                 return write_word_32(info, dest, data);
 433         }
 434 }
 435
 436 static int write_word_32(flash_info_t * info, ulong dest, ulong data)
 437 #else
 438 static int write_word(flash_info_t * info, ulong dest, ulong data)
 439 #endif
 440 {
 441         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 442         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 443         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 444         ulong start;
 445         int i, flag;
 446
 447         /* Check if Flash is (sufficiently) erased */
 448         if ((*((vu_long *)dest) & data) != data)
 449                 return (2);
 450
 451         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 452                 /* Disable interrupts which might cause a timeout here */
 453                 flag = disable_interrupts();
 454
 455                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 456                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 457                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
 458
 459                 dest2[i] = data2[i];
 460
 461                 /* re-enable interrupts if necessary */
 462                 if (flag)
 463                         enable_interrupts();
 464
 465                 /* data polling for D7 */
 466                 start = get_timer(0);
 467                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 468                                 (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
 469
 470                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
 471                                 return (1);
 472                 }
 473         }
 474
 475         return (0);
 476 }
 477
 478 #ifdef CFG_FLASH_2ND_16BIT_DEV
 479
 480 #undef  CFG_FLASH_WORD_SIZE
 481 #define CFG_FLASH_WORD_SIZE unsigned short
 482
 483 /*
 484  * The following code cannot be run from FLASH!
 485  */
 486 static ulong flash_get_size_16(vu_long * addr, flash_info_t * info)
 487 {
 488         short i;
 489         CFG_FLASH_WORD_SIZE value;
 490         ulong base = (ulong) addr;
 491         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
 492
 493         DEBUGF("get_size16: FLASH ADDR: %08x\n", (unsigned)addr);
 494
 495         /* issue bank reset to return to read mode */
 496         addr2[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;
 497
 498         /* Write auto select command: read Manufacturer ID */
 499         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
 500         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
 501         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90009000;
 502         udelay(1000);
 503
 504         value = swap16(addr2[0]);
 505         DEBUGF("FLASH MANUFACT: %x\n", value);
 506
 507         switch (value) {
 508                 case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 509                         info->flash_id = FLASH_MAN_AMD;
 510                         break;
 511                 case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
 512                         info->flash_id = FLASH_MAN_FUJ;
 513                         break;
 514                 default:
 515                         info->flash_id = FLASH_UNKNOWN;
 516                         info->sector_count = 0;
 517                         info->size = 0;
 518                         return (0);     /* no or unknown flash  */
 519         }
 520
 521         value = swap16(addr2[1]);       /* device ID            */
 522         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 523
 524         switch (value) {
 525                 case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
 526                         info->flash_id += FLASH_AM320B;
 527                         info->sector_count = 71;
 528                         info->size = 0x00400000;
 529                         break;  /* => 4 MB      */
 530                 case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
 531                         info->flash_id += FLASH_AM320T;
 532                         info->sector_count = 71;
 533                         info->size = 0x00400000;
 534                         break;  /* => 4 MB      */
 535                 default:
 536                         info->flash_id = FLASH_UNKNOWN;
 537                         return (0);     /* => no or unknown flash */
 538         }
 539
 540         if (info->flash_id & FLASH_BTYPE) {
 541                 /* set sector offsets for bottom boot block type        */
 542                 info->start[0] = base + 0x00000000;
 543                 info->start[1] = base + 0x00002000;
 544                 info->start[2] = base + 0x00004000;
 545                 info->start[3] = base + 0x00006000;
 546                 info->start[4] = base + 0x00008000;
 547                 info->start[5] = base + 0x0000a000;
 548                 info->start[6] = base + 0x0000c000;
 549                 info->start[7] = base + 0x0000e000;
 550
 551                 for (i = 8; i < info->sector_count; i++)
 552                         info->start[i] = base + (i * 0x00010000) - 0x00070000;
 553         } else {
 554                 /* set sector offsets for top boot block type           */
 555                 i = info->sector_count - 1;
 556                 info->start[i--] = base + info->size - 0x00002000;
 557                 info->start[i--] = base + info->size - 0x00004000;
 558                 info->start[i--] = base + info->size - 0x00006000;
 559                 info->start[i--] = base + info->size - 0x00008000;
 560                 info->start[i--] = base + info->size - 0x0000a000;
 561                 info->start[i--] = base + info->size - 0x0000c000;
 562                 info->start[i--] = base + info->size - 0x0000e000;
 563
 564                 for (; i >= 0; i--)
 565                         info->start[i] = base + i * 0x00010000;
 566         }
 567
 568         /* check for protected sectors */
 569         for (i = 0; i < info->sector_count; i++) {
 570                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 571                 /* D0 = 1 if protected */
 572                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 573
 574                 info->protect[i] = addr2[2] & 1;
 575         }
 576
 577         /* issue bank reset to return to read mode */
 578         addr2[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;
 579
 580         return (info->size);
 581 }
 582
 583 static int wait_for_DQ7_16(flash_info_t * info, int sect)
 584 {
 585         ulong start, now, last;
 586         volatile CFG_FLASH_WORD_SIZE *addr =
 587                 (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 588
 589         start = get_timer(0);
 590         last = start;
 591         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x80008000) !=
 592                         (CFG_FLASH_WORD_SIZE) 0x80008000) {
 593                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 594                         printf("Timeout\n");
 595                         return -1;
 596                 }
 597                 /* show that we're waiting */
 598                 if ((now - last) > 1000) {      /* every second */
 599                         putc('.');
 600                         last = now;
 601                 }
 602         }
 603         return 0;
 604 }
 605
 606 static int flash_erase_16(flash_info_t * info, int s_first, int s_last)
 607 {
 608         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 609         volatile CFG_FLASH_WORD_SIZE *addr2;
 610         int flag, prot, sect, l_sect;
 611
 612         if ((s_first < 0) || (s_first > s_last)) {
 613                 if (info->flash_id == FLASH_UNKNOWN)
 614                         printf("- missing\n");
 615                 else
 616                         printf("- no sectors to erase\n");
 617                 return 1;
 618         }
 619
 620         if (info->flash_id == FLASH_UNKNOWN) {
 621                 printf("Can't erase unknown flash type - aborted\n");
 622                 return 1;
 623         }
 624
 625         prot = 0;
 626         for (sect = s_first; sect <= s_last; ++sect) {
 627                 if (info->protect[sect])
 628                         prot++;
 629         }
 630
 631         if (prot)
 632                 printf("- Warning: %d protected sectors will not be erased!",   prot);
 633
 634         printf("\n");
 635
 636         l_sect = -1;
 637
 638         /* Disable interrupts which might cause a timeout here */
 639         flag = disable_interrupts();
 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                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 645
 646                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
 647                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
 648                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x80008000;
 649                         addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
 650                         addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
 651                         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x30003000;    /* sector erase */
 652
 653                         l_sect = sect;
 654                         /*
 655                          * Wait for each sector to complete, it's more
 656                          * reliable.  According to AMD Spec, you must
 657                          * issue all erase commands within a specified
 658                          * timeout.  This has been seen to fail, especially
 659                          * if printf()s are included (for debug)!!
 660                          */
 661                         wait_for_DQ7_16(info, sect);
 662                 }
 663         }
 664
 665         /* re-enable interrupts if necessary */
 666         if (flag)
 667                 enable_interrupts();
 668
 669         /* wait at least 80us - let's wait 1 ms */
 670         udelay(1000);
 671
 672         /* reset to read mode */
 673         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 674         addr[0] = (CFG_FLASH_WORD_SIZE) 0xF000F000;     /* reset bank */
 675
 676         printf(" done\n");
 677         return 0;
 678 }
 679
 680 static int write_word_16(flash_info_t * info, ulong dest, ulong data)
 681 {
 682         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 683         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 684         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 685         ulong start;
 686         int i;
 687
 688         /* Check if Flash is (sufficiently) erased */
 689         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 690                 if ((dest2[i] & swap16(data2[i])) != swap16(data2[i]))
 691                         return (2);
 692         }
 693
 694         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 695                 int flag;
 696
 697                 /* Disable interrupts which might cause a timeout here */
 698                 flag = disable_interrupts();
 699
 700                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAA00AA00;
 701                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55005500;
 702                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xA000A000;
 703
 704                 dest2[i] = swap16(data2[i]);
 705
 706                 /* re-enable interrupts if necessary */
 707                 if (flag)
 708                         enable_interrupts();
 709
 710                 /* data polling for D7 */
 711                 start = get_timer(0);
 712                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x80008000) !=
 713                                 (swap16(data2[i]) & (CFG_FLASH_WORD_SIZE) 0x80008000)) {
 714
 715                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 716                                 return (1);
 717                         }
 718                 }
 719         }
 720
 721         return (0);
 722 }
 723 #endif /* CFG_FLASH_2ND_16BIT_DEV */
 724
 725 /*-----------------------------------------------------------------------
 726  * Functions
 727  */
 728 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
 729 static int write_word(flash_info_t * info, ulong dest, ulong data);
 730
 731 /*-----------------------------------------------------------------------
 732  */
 733
 734 unsigned long flash_init(void)
 735 {
 736         unsigned long total_b = 0;
 737         unsigned long size_b[CFG_MAX_FLASH_BANKS];
 738         unsigned short index = 0;
 739         int i;
 740
 741         DEBUGF("\n");
 742         DEBUGF("FLASH: Index: %d\n", index);
 743
 744         /* Init: no FLASHes known */
 745         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
 746                 flash_info[i].flash_id = FLASH_UNKNOWN;
 747                 flash_info[i].sector_count = -1;
 748                 flash_info[i].size = 0;
 749
 750                 /* check whether the address is 0 */
 751                 if (flash_addr_table[index][i] == 0)
 752                         continue;
 753
 754                 /* call flash_get_size() to initialize sector address */
 755                 size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
 756                                 &flash_info[i]);
 757
 758                 flash_info[i].size = size_b[i];
 759
 760                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 761                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 762                                         i+1, size_b[i], size_b[i] << 20);
 763                         flash_info[i].sector_count = -1;
 764                         flash_info[i].size = 0;
 765                 }
 766
 767                 /* Monitor protection ON by default */
 768                 (void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
 769                                     CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
 770                                     &flash_info[i]);
 771 #if defined(CONFIG_ENV_IS_IN_FLASH)
 772                 (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
 773                                     CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
 774                                     &flash_info[i]);
 775 #if defined(CFG_ENV_ADDR_REDUND)
 776                 (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND,
 777                                     CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
 778                                     &flash_info[i]);
 779 #endif
 780 #endif
 781                 total_b += flash_info[i].size;
 782         }
 783
 784         return total_b;
 785 }
 786 #endif /* if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH) */