board/tqc/tqm5200/cam5200_flash.c

   1 /*
   2  * (C) Copyright 2006
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <mpc5xxx.h>
  10 #include <asm/processor.h>
  11
  12 #if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH)
  13
  14 #if 0
  15 #define DEBUGF(x...) printf(x)
  16 #else
  17 #define DEBUGF(x...)
  18 #endif
  19
  20 #define swap16(x) __swab16(x)
  21
  22 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips */
  23
  24 /*
  25  * CAM5200 is a TQM5200B based board. Additionally it also features
  26  * a NIOS cpu. The NIOS CPU peripherals are accessible through MPC5xxx
  27  * Local Bus on CS5. This includes 32 bit wide RAM and SRAM as well as
  28  * 16 bit wide flash device. Big Endian order on a 32 bit CS5 makes
  29  * access to flash chip slightly more complicated as additional byte
  30  * swapping is necessary within each 16 bit wide flash 'word'.
  31  *
  32  * This driver's task is to handle both flash devices: 32 bit TQM5200B
  33  * flash chip and 16 bit NIOS cpu flash chip. In the below
  34  * flash_addr_table table we use least significant address bit to mark
  35  * 16 bit flash bank and two sets of routines *_32 and *_16 to handle
  36  * specifics of both flashes.
  37  */
  38 static unsigned long flash_addr_table[][CONFIG_SYS_MAX_FLASH_BANKS] = {
  39         {CONFIG_SYS_BOOTCS_START, CONFIG_SYS_CS5_START | 1}
  40 };
  41
  42 /*-----------------------------------------------------------------------
  43  * Functions
  44  */
  45 static int write_word(flash_info_t * info, ulong dest, ulong data);
  46 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
  47 static int write_word_32(flash_info_t * info, ulong dest, ulong data);
  48 static int write_word_16(flash_info_t * info, ulong dest, ulong data);
  49 static int flash_erase_32(flash_info_t * info, int s_first, int s_last);
  50 static int flash_erase_16(flash_info_t * info, int s_first, int s_last);
  51 static ulong flash_get_size_32(vu_long * addr, flash_info_t * info);
  52 static ulong flash_get_size_16(vu_long * addr, flash_info_t * info);
  53 #endif
  54
  55 void flash_print_info(flash_info_t * info)
  56 {
  57         int i, k;
  58         int size, erased;
  59         volatile unsigned long *flash;
  60
  61         if (info->flash_id == FLASH_UNKNOWN) {
  62                 printf("missing or unknown FLASH type\n");
  63                 return;
  64         }
  65
  66         switch (info->flash_id & FLASH_VENDMASK) {
  67                 case FLASH_MAN_AMD:
  68                         printf("AMD ");
  69                         break;
  70                 case FLASH_MAN_FUJ:
  71                         printf("FUJITSU ");
  72                         break;
  73                 default:
  74                         printf("Unknown Vendor ");
  75                         break;
  76         }
  77
  78         switch (info->flash_id & FLASH_TYPEMASK) {
  79                 case FLASH_S29GL128N:
  80                         printf ("S29GL128N (256 Mbit, uniform sector size)\n");
  81                         break;
  82                 case FLASH_AM320B:
  83                         printf ("29LV320B (32 Mbit, bottom boot sect)\n");
  84                         break;
  85                 case FLASH_AM320T:
  86                         printf ("29LV320T (32 Mbit, top boot sect)\n");
  87                         break;
  88                 default:
  89                         printf("Unknown Chip Type\n");
  90                         break;
  91         }
  92
  93         printf("  Size: %ld KB in %d Sectors\n",
  94                         info->size >> 10, info->sector_count);
  95
  96         printf("  Sector Start Addresses:");
  97         for (i = 0; i < info->sector_count; ++i) {
  98                 /*
  99                  * Check if whole sector is erased
 100                  */
 101                 if (i != (info->sector_count - 1))
 102                         size = info->start[i + 1] - info->start[i];
 103                 else
 104                         size = info->start[0] + info->size - info->start[i];
 105
 106                 erased = 1;
 107                 flash = (volatile unsigned long *)info->start[i];
 108                 size = size >> 2;       /* divide by 4 for longword access */
 109
 110                 for (k = 0; k < size; k++) {
 111                         if (*flash++ != 0xffffffff) {
 112                                 erased = 0;
 113                                 break;
 114                         }
 115                 }
 116
 117                 if ((i % 5) == 0)
 118                         printf("\n   ");
 119
 120                 printf(" %08lX%s%s", info->start[i],
 121                                 erased ? " E" : "  ",
 122                                 info->protect[i] ? "RO " : "   ");
 123         }
 124         printf("\n");
 125         return;
 126 }
 127
 128
 129 /*
 130  * The following code cannot be run from FLASH!
 131  */
 132 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
 133 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 134 {
 135
 136         DEBUGF("get_size: FLASH ADDR %08lx\n", addr);
 137
 138         /* bit 0 used for big flash marking */
 139         if ((ulong)addr & 0x1)
 140                 return flash_get_size_16((vu_long *)((ulong)addr & 0xfffffffe), info);
 141         else
 142                 return flash_get_size_32(addr, info);
 143 }
 144
 145 static ulong flash_get_size_32(vu_long * addr, flash_info_t * info)
 146 #else
 147 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 148 #endif
 149 {
 150         short i;
 151         CONFIG_SYS_FLASH_WORD_SIZE value;
 152         ulong base = (ulong) addr;
 153         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) addr;
 154
 155         DEBUGF("get_size32: FLASH ADDR: %08x\n", (unsigned)addr);
 156
 157         /* Write auto select command: read Manufacturer ID */
 158         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00AA00AA;
 159         addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00550055;
 160         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00900090;
 161         udelay(1000);
 162
 163         value = addr2[0];
 164         DEBUGF("FLASH MANUFACT: %x\n", value);
 165
 166         switch (value) {
 167                 case (CONFIG_SYS_FLASH_WORD_SIZE) AMD_MANUFACT:
 168                         info->flash_id = FLASH_MAN_AMD;
 169                         break;
 170                 default:
 171                         info->flash_id = FLASH_UNKNOWN;
 172                         info->sector_count = 0;
 173                         info->size = 0;
 174                         return (0);     /* no or unknown flash  */
 175         }
 176
 177         value = addr2[1];       /* device ID            */
 178         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 179
 180         switch (value) {
 181                 case AMD_ID_MIRROR:
 182                         DEBUGF("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 183                                         addr[14], addr[15]);
 184                         switch(addr[14]) {
 185                                 case AMD_ID_GL128N_2:
 186                                         if (addr[15] != AMD_ID_GL128N_3) {
 187                                                 DEBUGF("Chip: S29GL128N -> unknown\n");
 188                                                 info->flash_id = FLASH_UNKNOWN;
 189                                         } else {
 190                                                 DEBUGF("Chip: S29GL128N\n");
 191                                                 info->flash_id += FLASH_S29GL128N;
 192                                                 info->sector_count = 128;
 193                                                 info->size = 0x02000000;
 194                                         }
 195                                         break;
 196                                 default:
 197                                         info->flash_id = FLASH_UNKNOWN;
 198                                         return(0);
 199                         }
 200                         break;
 201
 202                 default:
 203                         info->flash_id = FLASH_UNKNOWN;
 204                         return (0);     /* => no or unknown flash */
 205         }
 206
 207         /* set up sector start address table */
 208         for (i = 0; i < info->sector_count; i++)
 209                 info->start[i] = base + (i * 0x00040000);
 210
 211         /* check for protected sectors */
 212         for (i = 0; i < info->sector_count; i++) {
 213                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 214                 /* D0 = 1 if protected */
 215                 addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
 216
 217                 info->protect[i] = addr2[2] & 1;
 218         }
 219
 220         /* issue bank reset to return to read mode */
 221         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00F000F0;
 222
 223         return (info->size);
 224 }
 225
 226 static int wait_for_DQ7_32(flash_info_t * info, int sect)
 227 {
 228         ulong start, now, last;
 229         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr =
 230                 (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]);
 231
 232         start = get_timer(0);
 233         last = start;
 234         while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080) !=
 235                         (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080) {
 236                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 237                         printf("Timeout\n");
 238                         return -1;
 239                 }
 240                 /* show that we're waiting */
 241                 if ((now - last) > 1000) {      /* every second */
 242                         putc('.');
 243                         last = now;
 244                 }
 245         }
 246         return 0;
 247 }
 248
 249 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
 250 int flash_erase(flash_info_t * info, int s_first, int s_last)
 251 {
 252         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
 253                 return flash_erase_16(info, s_first, s_last);
 254         } else {
 255                 return flash_erase_32(info, s_first, s_last);
 256         }
 257 }
 258
 259 static int flash_erase_32(flash_info_t * info, int s_first, int s_last)
 260 #else
 261 int flash_erase(flash_info_t * info, int s_first, int s_last)
 262 #endif
 263 {
 264         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]);
 265         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
 266         int flag, prot, sect;
 267
 268         if ((s_first < 0) || (s_first > s_last)) {
 269                 if (info->flash_id == FLASH_UNKNOWN)
 270                         printf("- missing\n");
 271                 else
 272                         printf("- no sectors to erase\n");
 273                 return 1;
 274         }
 275
 276         if (info->flash_id == FLASH_UNKNOWN) {
 277                 printf("Can't erase unknown flash type - aborted\n");
 278                 return 1;
 279         }
 280
 281         prot = 0;
 282         for (sect = s_first; sect <= s_last; ++sect) {
 283                 if (info->protect[sect])
 284                         prot++;
 285         }
 286
 287         if (prot)
 288                 printf("- Warning: %d protected sectors will not be erased!", prot);
 289
 290         printf("\n");
 291
 292         /* Disable interrupts which might cause a timeout here */
 293         flag = disable_interrupts();
 294
 295         /* Start erase on unprotected sectors */
 296         for (sect = s_first; sect <= s_last; sect++) {
 297                 if (info->protect[sect] == 0) { /* not protected */
 298                         addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]);
 299
 300                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00AA00AA;
 301                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00550055;
 302                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080;
 303                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00AA00AA;
 304                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00550055;
 305                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00300030;     /* sector erase */
 306
 307                         /*
 308                          * Wait for each sector to complete, it's more
 309                          * reliable.  According to AMD Spec, you must
 310                          * issue all erase commands within a specified
 311                          * timeout.  This has been seen to fail, especially
 312                          * if printf()s are included (for debug)!!
 313                          */
 314                         wait_for_DQ7_32(info, sect);
 315                 }
 316         }
 317
 318         /* re-enable interrupts if necessary */
 319         if (flag)
 320                 enable_interrupts();
 321
 322         /* wait at least 80us - let's wait 1 ms */
 323         udelay(1000);
 324
 325         /* reset to read mode */
 326         addr = (CONFIG_SYS_FLASH_WORD_SIZE *) info->start[0];
 327         addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00F000F0;      /* reset bank */
 328
 329         printf(" done\n");
 330         return 0;
 331 }
 332
 333 /*-----------------------------------------------------------------------
 334  * Copy memory to flash, returns:
 335  * 0 - OK
 336  * 1 - write timeout
 337  * 2 - Flash not erased
 338  */
 339 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 340 {
 341         ulong cp, wp, data;
 342         int i, l, rc;
 343
 344         wp = (addr & ~3);       /* get lower word aligned address */
 345
 346         /*
 347          * handle unaligned start bytes
 348          */
 349         if ((l = addr - wp) != 0) {
 350                 data = 0;
 351                 for (i = 0, cp = wp; i < l; ++i, ++cp)
 352                         data = (data << 8) | (*(uchar *) cp);
 353
 354                 for (; i < 4 && cnt > 0; ++i) {
 355                         data = (data << 8) | *src++;
 356                         --cnt;
 357                         ++cp;
 358                 }
 359
 360                 for (; cnt == 0 && i < 4; ++i, ++cp)
 361                         data = (data << 8) | (*(uchar *) cp);
 362
 363                 if ((rc = write_word(info, wp, data)) != 0)
 364                         return (rc);
 365
 366                 wp += 4;
 367         }
 368
 369         /*
 370          * handle word aligned part
 371          */
 372         while (cnt >= 4) {
 373                 data = 0;
 374                 for (i = 0; i < 4; ++i)
 375                         data = (data << 8) | *src++;
 376
 377                 if ((rc = write_word(info, wp, data)) != 0)
 378                         return (rc);
 379
 380                 wp += 4;
 381                 cnt -= 4;
 382         }
 383
 384         if (cnt == 0)
 385                 return (0);
 386
 387         /*
 388          * handle unaligned tail bytes
 389          */
 390         data = 0;
 391         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 392                 data = (data << 8) | *src++;
 393                 --cnt;
 394         }
 395         for (; i < 4; ++i, ++cp)
 396                 data = (data << 8) | (*(uchar *) cp);
 397
 398         return (write_word(info, wp, data));
 399 }
 400
 401 /*-----------------------------------------------------------------------
 402  * Copy memory to flash, returns:
 403  * 0 - OK
 404  * 1 - write timeout
 405  * 2 - Flash not erased
 406  */
 407 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
 408 static int write_word(flash_info_t * info, ulong dest, ulong data)
 409 {
 410         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
 411                 return write_word_16(info, dest, data);
 412         } else {
 413                 return write_word_32(info, dest, data);
 414         }
 415 }
 416
 417 static int write_word_32(flash_info_t * info, ulong dest, ulong data)
 418 #else
 419 static int write_word(flash_info_t * info, ulong dest, ulong data)
 420 #endif
 421 {
 422         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]);
 423         volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *) dest;
 424         ulong *datap = &data;
 425         volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 =
 426                         (volatile CONFIG_SYS_FLASH_WORD_SIZE *)datap;
 427         ulong start;
 428         int i, flag;
 429
 430         /* Check if Flash is (sufficiently) erased */
 431         if ((*((vu_long *)dest) & data) != data)
 432                 return (2);
 433
 434         for (i = 0; i < 4 / sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
 435                 /* Disable interrupts which might cause a timeout here */
 436                 flag = disable_interrupts();
 437
 438                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00AA00AA;
 439                 addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00550055;
 440                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00A000A0;
 441
 442                 dest2[i] = data2[i];
 443
 444                 /* re-enable interrupts if necessary */
 445                 if (flag)
 446                         enable_interrupts();
 447
 448                 /* data polling for D7 */
 449                 start = get_timer(0);
 450                 while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080) !=
 451                                 (data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080)) {
 452
 453                         if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 454                                 return (1);
 455                 }
 456         }
 457
 458         return (0);
 459 }
 460
 461 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
 462
 463 #undef  CONFIG_SYS_FLASH_WORD_SIZE
 464 #define CONFIG_SYS_FLASH_WORD_SIZE unsigned short
 465
 466 /*
 467  * The following code cannot be run from FLASH!
 468  */
 469 static ulong flash_get_size_16(vu_long * addr, flash_info_t * info)
 470 {
 471         short i;
 472         CONFIG_SYS_FLASH_WORD_SIZE value;
 473         ulong base = (ulong) addr;
 474         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) addr;
 475
 476         DEBUGF("get_size16: FLASH ADDR: %08x\n", (unsigned)addr);
 477
 478         /* issue bank reset to return to read mode */
 479         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xF000F000;
 480
 481         /* Write auto select command: read Manufacturer ID */
 482         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xAA00AA00;
 483         addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x55005500;
 484         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x90009000;
 485         udelay(1000);
 486
 487         value = swap16(addr2[0]);
 488         DEBUGF("FLASH MANUFACT: %x\n", value);
 489
 490         switch (value) {
 491                 case (CONFIG_SYS_FLASH_WORD_SIZE) AMD_MANUFACT:
 492                         info->flash_id = FLASH_MAN_AMD;
 493                         break;
 494                 case (CONFIG_SYS_FLASH_WORD_SIZE) FUJ_MANUFACT:
 495                         info->flash_id = FLASH_MAN_FUJ;
 496                         break;
 497                 default:
 498                         info->flash_id = FLASH_UNKNOWN;
 499                         info->sector_count = 0;
 500                         info->size = 0;
 501                         return (0);     /* no or unknown flash  */
 502         }
 503
 504         value = swap16(addr2[1]);       /* device ID            */
 505         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 506
 507         switch (value) {
 508                 case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
 509                         info->flash_id += FLASH_AM320B;
 510                         info->sector_count = 71;
 511                         info->size = 0x00400000;
 512                         break;  /* => 4 MB      */
 513                 case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
 514                         info->flash_id += FLASH_AM320T;
 515                         info->sector_count = 71;
 516                         info->size = 0x00400000;
 517                         break;  /* => 4 MB      */
 518                 default:
 519                         info->flash_id = FLASH_UNKNOWN;
 520                         return (0);     /* => no or unknown flash */
 521         }
 522
 523         if (info->flash_id & FLASH_BTYPE) {
 524                 /* set sector offsets for bottom boot block type        */
 525                 info->start[0] = base + 0x00000000;
 526                 info->start[1] = base + 0x00002000;
 527                 info->start[2] = base + 0x00004000;
 528                 info->start[3] = base + 0x00006000;
 529                 info->start[4] = base + 0x00008000;
 530                 info->start[5] = base + 0x0000a000;
 531                 info->start[6] = base + 0x0000c000;
 532                 info->start[7] = base + 0x0000e000;
 533
 534                 for (i = 8; i < info->sector_count; i++)
 535                         info->start[i] = base + (i * 0x00010000) - 0x00070000;
 536         } else {
 537                 /* set sector offsets for top boot block type           */
 538                 i = info->sector_count - 1;
 539                 info->start[i--] = base + info->size - 0x00002000;
 540                 info->start[i--] = base + info->size - 0x00004000;
 541                 info->start[i--] = base + info->size - 0x00006000;
 542                 info->start[i--] = base + info->size - 0x00008000;
 543                 info->start[i--] = base + info->size - 0x0000a000;
 544                 info->start[i--] = base + info->size - 0x0000c000;
 545                 info->start[i--] = base + info->size - 0x0000e000;
 546
 547                 for (; i >= 0; i--)
 548                         info->start[i] = base + i * 0x00010000;
 549         }
 550
 551         /* check for protected sectors */
 552         for (i = 0; i < info->sector_count; i++) {
 553                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 554                 /* D0 = 1 if protected */
 555                 addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
 556
 557                 info->protect[i] = addr2[2] & 1;
 558         }
 559
 560         /* issue bank reset to return to read mode */
 561         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xF000F000;
 562
 563         return (info->size);
 564 }
 565
 566 static int wait_for_DQ7_16(flash_info_t * info, int sect)
 567 {
 568         ulong start, now, last;
 569         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr =
 570                 (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]);
 571
 572         start = get_timer(0);
 573         last = start;
 574         while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000) !=
 575                         (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000) {
 576                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 577                         printf("Timeout\n");
 578                         return -1;
 579                 }
 580                 /* show that we're waiting */
 581                 if ((now - last) > 1000) {      /* every second */
 582                         putc('.');
 583                         last = now;
 584                 }
 585         }
 586         return 0;
 587 }
 588
 589 static int flash_erase_16(flash_info_t * info, int s_first, int s_last)
 590 {
 591         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]);
 592         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
 593         int flag, prot, sect;
 594
 595         if ((s_first < 0) || (s_first > s_last)) {
 596                 if (info->flash_id == FLASH_UNKNOWN)
 597                         printf("- missing\n");
 598                 else
 599                         printf("- no sectors to erase\n");
 600                 return 1;
 601         }
 602
 603         if (info->flash_id == FLASH_UNKNOWN) {
 604                 printf("Can't erase unknown flash type - aborted\n");
 605                 return 1;
 606         }
 607
 608         prot = 0;
 609         for (sect = s_first; sect <= s_last; ++sect) {
 610                 if (info->protect[sect])
 611                         prot++;
 612         }
 613
 614         if (prot)
 615                 printf("- Warning: %d protected sectors will not be erased!",   prot);
 616
 617         printf("\n");
 618
 619         /* Disable interrupts which might cause a timeout here */
 620         flag = disable_interrupts();
 621
 622         /* Start erase on unprotected sectors */
 623         for (sect = s_first; sect <= s_last; sect++) {
 624                 if (info->protect[sect] == 0) { /* not protected */
 625                         addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]);
 626
 627                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xAA00AA00;
 628                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x55005500;
 629                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000;
 630                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xAA00AA00;
 631                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x55005500;
 632                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x30003000;     /* sector erase */
 633
 634                         /*
 635                          * Wait for each sector to complete, it's more
 636                          * reliable.  According to AMD Spec, you must
 637                          * issue all erase commands within a specified
 638                          * timeout.  This has been seen to fail, especially
 639                          * if printf()s are included (for debug)!!
 640                          */
 641                         wait_for_DQ7_16(info, sect);
 642                 }
 643         }
 644
 645         /* re-enable interrupts if necessary */
 646         if (flag)
 647                 enable_interrupts();
 648
 649         /* wait at least 80us - let's wait 1 ms */
 650         udelay(1000);
 651
 652         /* reset to read mode */
 653         addr = (CONFIG_SYS_FLASH_WORD_SIZE *) info->start[0];
 654         addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xF000F000;      /* reset bank */
 655
 656         printf(" done\n");
 657         return 0;
 658 }
 659
 660 static int write_word_16(flash_info_t * info, ulong dest, ulong data)
 661 {
 662         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]);
 663         volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *) dest;
 664         ulong *datap = &data;
 665         volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 =
 666                         (volatile CONFIG_SYS_FLASH_WORD_SIZE *)datap;
 667         ulong start;
 668         int i;
 669
 670         /* Check if Flash is (sufficiently) erased */
 671         for (i = 0; i < 4 / sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
 672                 if ((dest2[i] & swap16(data2[i])) != swap16(data2[i]))
 673                         return (2);
 674         }
 675
 676         for (i = 0; i < 4 / sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
 677                 int flag;
 678
 679                 /* Disable interrupts which might cause a timeout here */
 680                 flag = disable_interrupts();
 681
 682                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xAA00AA00;
 683                 addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x55005500;
 684                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xA000A000;
 685
 686                 dest2[i] = swap16(data2[i]);
 687
 688                 /* re-enable interrupts if necessary */
 689                 if (flag)
 690                         enable_interrupts();
 691
 692                 /* data polling for D7 */
 693                 start = get_timer(0);
 694                 while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000) !=
 695                                 (swap16(data2[i]) & (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000)) {
 696
 697                         if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 698                                 return (1);
 699                         }
 700                 }
 701         }
 702
 703         return (0);
 704 }
 705 #endif /* CONFIG_SYS_FLASH_2ND_16BIT_DEV */
 706
 707 /*-----------------------------------------------------------------------
 708  * Functions
 709  */
 710 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
 711 static int write_word(flash_info_t * info, ulong dest, ulong data);
 712
 713 /*-----------------------------------------------------------------------
 714  */
 715
 716 unsigned long flash_init(void)
 717 {
 718         unsigned long total_b = 0;
 719         unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
 720         unsigned short index = 0;
 721         int i;
 722
 723         DEBUGF("\n");
 724         DEBUGF("FLASH: Index: %d\n", index);
 725
 726         /* Init: no FLASHes known */
 727         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 728                 flash_info[i].flash_id = FLASH_UNKNOWN;
 729                 flash_info[i].sector_count = -1;
 730                 flash_info[i].size = 0;
 731
 732                 /* check whether the address is 0 */
 733                 if (flash_addr_table[index][i] == 0)
 734                         continue;
 735
 736                 /* call flash_get_size() to initialize sector address */
 737                 size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
 738                                 &flash_info[i]);
 739
 740                 flash_info[i].size = size_b[i];
 741
 742                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 743                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 744                                         i+1, size_b[i], size_b[i] << 20);
 745                         flash_info[i].sector_count = -1;
 746                         flash_info[i].size = 0;
 747                 }
 748
 749                 /* Monitor protection ON by default */
 750                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 751                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 752                                     &flash_info[i]);
 753 #if defined(CONFIG_ENV_IS_IN_FLASH)
 754                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 755                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 756                                     &flash_info[i]);
 757 #if defined(CONFIG_ENV_ADDR_REDUND)
 758                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 759                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 760                                     &flash_info[i]);
 761 #endif
 762 #endif
 763                 total_b += flash_info[i].size;
 764         }
 765
 766         return total_b;
 767 }
 768 #endif /* if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH) */