board/amcc/common/flash.c

   1 /*
   2  * (C) Copyright 2004-2005
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
   6  * Add support for Am29F016D and dynamic switch setting.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 /*
  28  * Modified 4/5/2001
  29  * Wait for completion of each sector erase command issued
  30  * 4/5/2001
  31  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  32  */
  33
  34 #include <common.h>
  35 #include <ppc4xx.h>
  36 #include <asm/processor.h>
  37
  38 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips */
  39
  40 /*-----------------------------------------------------------------------
  41  * Functions
  42  */
  43 static int write_word(flash_info_t * info, ulong dest, ulong data);
  44 #ifdef CFG_FLASH_2ND_16BIT_DEV
  45 static int write_word_1(flash_info_t * info, ulong dest, ulong data);
  46 static int write_word_2(flash_info_t * info, ulong dest, ulong data);
  47 static int flash_erase_1(flash_info_t * info, int s_first, int s_last);
  48 static int flash_erase_2(flash_info_t * info, int s_first, int s_last);
  49 static ulong flash_get_size_1(vu_long * addr, flash_info_t * info);
  50 static ulong flash_get_size_2(vu_long * addr, flash_info_t * info);
  51 #endif
  52
  53 void flash_print_info(flash_info_t * info)
  54 {
  55         int i;
  56         int k;
  57         int size;
  58         int 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_STM:
  71                 printf("STM ");
  72                 break;
  73         case FLASH_MAN_FUJ:
  74                 printf("FUJITSU ");
  75                 break;
  76         case FLASH_MAN_SST:
  77                 printf("SST ");
  78                 break;
  79         case FLASH_MAN_MX:
  80                 printf ("MACRONIX ");
  81                 break;
  82         default:
  83                 printf("Unknown Vendor ");
  84                 break;
  85         }
  86
  87         switch (info->flash_id & FLASH_TYPEMASK) {
  88         case FLASH_AM040:
  89                 printf("AM29F040 (512 Kbit, uniform sector size)\n");
  90                 break;
  91         case FLASH_AM400B:
  92                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
  93                 break;
  94         case FLASH_AM400T:
  95                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
  96                 break;
  97         case FLASH_AM800B:
  98                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
  99                 break;
 100         case FLASH_AM800T:
 101                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 102                 break;
 103         case FLASH_AMD016:
 104                 printf("AM29F016D (16 Mbit, uniform sector size)\n");
 105                 break;
 106         case FLASH_AM160B:
 107                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 108                 break;
 109         case FLASH_AM160T:
 110                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 111                 break;
 112         case FLASH_AM320B:
 113                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 114                 break;
 115         case FLASH_AM320T:
 116                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 117                 break;
 118         case FLASH_AM033C:
 119                 printf("AM29LV033C (32 Mbit, top boot sector)\n");
 120                 break;
 121         case FLASH_SST800A:
 122                 printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 123                 break;
 124         case FLASH_SST160A:
 125                 printf("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 126                 break;
 127         case FLASH_STMW320DT:
 128                 printf ("M29W320DT (32 M, top sector)\n");
 129                 break;
 130         case FLASH_MXLV320T:
 131                 printf ("MXLV320T (32 Mbit, top sector)\n");
 132                 break;
 133         default:
 134                 printf("Unknown Chip Type\n");
 135                 break;
 136         }
 137
 138         printf("  Size: %ld KB in %d Sectors\n",
 139                info->size >> 10, info->sector_count);
 140
 141         printf("  Sector Start Addresses:");
 142         for (i = 0; i < info->sector_count; ++i) {
 143                 /*
 144                  * Check if whole sector is erased
 145                  */
 146                 if (i != (info->sector_count - 1))
 147                         size = info->start[i + 1] - info->start[i];
 148                 else
 149                         size = info->start[0] + info->size - info->start[i];
 150                 erased = 1;
 151                 flash = (volatile unsigned long *)info->start[i];
 152                 size = size >> 2;       /* divide by 4 for longword access */
 153                 for (k = 0; k < size; k++) {
 154                         if (*flash++ != 0xffffffff) {
 155                                 erased = 0;
 156                                 break;
 157                         }
 158                 }
 159
 160                 if ((i % 5) == 0)
 161                         printf("\n   ");
 162                 printf(" %08lX%s%s",
 163                        info->start[i],
 164                        erased ? " E" : "  ", info->protect[i] ? "RO " : "   ");
 165         }
 166         printf("\n");
 167         return;
 168 }
 169
 170
 171 /*
 172  * The following code cannot be run from FLASH!
 173  */
 174 #ifdef CFG_FLASH_2ND_16BIT_DEV
 175 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 176 {
 177         /* bit 0 used for big flash marking */
 178         if ((ulong)addr & 0x1) {
 179                 return flash_get_size_2((vu_long *)((ulong)addr & 0xfffffffe), info);
 180         } else {
 181                 return flash_get_size_1(addr, info);
 182         }
 183 }
 184
 185 static ulong flash_get_size_1(vu_long * addr, flash_info_t * info)
 186 #else
 187 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 188 #endif
 189 {
 190         short i;
 191         CFG_FLASH_WORD_SIZE value;
 192         ulong base = (ulong) addr;
 193         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
 194
 195         DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
 196
 197         /* Write auto select command: read Manufacturer ID */
 198         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 199         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 200         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
 201         udelay(1000);
 202
 203         value = addr2[0];
 204         DEBUGF("FLASH MANUFACT: %x\n", value);
 205
 206         switch (value) {
 207         case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 208                 info->flash_id = FLASH_MAN_AMD;
 209                 break;
 210         case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
 211                 info->flash_id = FLASH_MAN_FUJ;
 212                 break;
 213         case (CFG_FLASH_WORD_SIZE) SST_MANUFACT:
 214                 info->flash_id = FLASH_MAN_SST;
 215                 break;
 216         case (CFG_FLASH_WORD_SIZE) STM_MANUFACT:
 217                 info->flash_id = FLASH_MAN_STM;
 218                 break;
 219         default:
 220                 info->flash_id = FLASH_UNKNOWN;
 221                 info->sector_count = 0;
 222                 info->size = 0;
 223                 return (0);     /* no or unknown flash  */
 224         }
 225
 226         value = addr2[1];       /* device ID */
 227         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 228
 229         switch (value) {
 230         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV040B:
 231                 info->flash_id += FLASH_AM040;
 232                 info->sector_count = 8;
 233                 info->size = 0x0080000;         /* => 512 KiB */
 234                 break;
 235
 236         case (CFG_FLASH_WORD_SIZE) AMD_ID_F040B:
 237                 info->flash_id += FLASH_AM040;
 238                 info->sector_count = 8;
 239                 info->size = 0x0080000;         /* => 512 KiB */
 240                 break;
 241
 242         case (CFG_FLASH_WORD_SIZE) STM_ID_M29W040B:
 243                 info->flash_id += FLASH_AM040;
 244                 info->sector_count = 8;
 245                 info->size = 0x0080000;         /* => 512 KiB */
 246                 break;
 247
 248         case (CFG_FLASH_WORD_SIZE) AMD_ID_F016D:
 249                 info->flash_id += FLASH_AMD016;
 250                 info->sector_count = 32;
 251                 info->size = 0x00200000;        /* => 2 MiB */
 252                 break;
 253
 254         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV033C:
 255                 info->flash_id += FLASH_AMDLV033C;
 256                 info->sector_count = 64;
 257                 info->size = 0x00400000;        /* => 4 MiB */
 258                 break;
 259
 260         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400T:
 261                 info->flash_id += FLASH_AM400T;
 262                 info->sector_count = 11;
 263                 info->size = 0x00080000;        /* => 512 KiB */
 264                 break;
 265
 266         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400B:
 267                 info->flash_id += FLASH_AM400B;
 268                 info->sector_count = 11;
 269                 info->size = 0x00080000;        /* => 512 KiB */
 270                 break;
 271
 272         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800T:
 273                 info->flash_id += FLASH_AM800T;
 274                 info->sector_count = 19;
 275                 info->size = 0x00100000;        /* => 1 MiB */
 276                 break;
 277
 278         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800B:
 279                 info->flash_id += FLASH_AM800B;
 280                 info->sector_count = 19;
 281                 info->size = 0x00100000;        /* => 1 MiB */
 282                 break;
 283
 284         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160T:
 285                 info->flash_id += FLASH_AM160T;
 286                 info->sector_count = 35;
 287                 info->size = 0x00200000;        /* => 2 MiB */
 288                 break;
 289
 290         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160B:
 291                 info->flash_id += FLASH_AM160B;
 292                 info->sector_count = 35;
 293                 info->size = 0x00200000;        /* => 2 MiB */
 294                 break;
 295
 296         default:
 297                 info->flash_id = FLASH_UNKNOWN;
 298                 return (0);     /* => no or unknown flash */
 299         }
 300
 301         /* set up sector start address table */
 302         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 303             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
 304             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
 305                 for (i = 0; i < info->sector_count; i++)
 306                         info->start[i] = base + (i * 0x00010000);
 307         } else {
 308                 if (info->flash_id & FLASH_BTYPE) {
 309                         /* set sector offsets for bottom boot block type */
 310                         info->start[0] = base + 0x00000000;
 311                         info->start[1] = base + 0x00004000;
 312                         info->start[2] = base + 0x00006000;
 313                         info->start[3] = base + 0x00008000;
 314                         for (i = 4; i < info->sector_count; i++) {
 315                                 info->start[i] =
 316                                     base + (i * 0x00010000) - 0x00030000;
 317                         }
 318                 } else {
 319                         /* set sector offsets for top boot block type */
 320                         i = info->sector_count - 1;
 321                         info->start[i--] = base + info->size - 0x00004000;
 322                         info->start[i--] = base + info->size - 0x00006000;
 323                         info->start[i--] = base + info->size - 0x00008000;
 324                         for (; i >= 0; i--) {
 325                                 info->start[i] = base + i * 0x00010000;
 326                         }
 327                 }
 328         }
 329
 330         /* check for protected sectors */
 331         for (i = 0; i < info->sector_count; i++) {
 332                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 333                 /* D0 = 1 if protected */
 334                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 335
 336                 /* For AMD29033C flash we need to resend the command of *
 337                  * reading flash protection for upper 8 Mb of flash     */
 338                 if (i == 32) {
 339                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA;
 340                         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555;
 341                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090;
 342                 }
 343
 344                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 345                         info->protect[i] = 0;
 346                 else
 347                         info->protect[i] = addr2[2] & 1;
 348         }
 349
 350         /* issue bank reset to return to read mode */
 351         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
 352
 353         return (info->size);
 354 }
 355
 356 static int wait_for_DQ7_1(flash_info_t * info, int sect)
 357 {
 358         ulong start, now, last;
 359         volatile CFG_FLASH_WORD_SIZE *addr =
 360             (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 361
 362         start = get_timer(0);
 363         last = start;
 364         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 365                (CFG_FLASH_WORD_SIZE) 0x00800080) {
 366                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 367                         printf("Timeout\n");
 368                         return -1;
 369                 }
 370                 /* show that we're waiting */
 371                 if ((now - last) > 1000) {      /* every second */
 372                         putc('.');
 373                         last = now;
 374                 }
 375         }
 376         return 0;
 377 }
 378
 379 #ifdef CFG_FLASH_2ND_16BIT_DEV
 380 int flash_erase(flash_info_t * info, int s_first, int s_last)
 381 {
 382         if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 383             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 384             ((info->flash_id & FLASH_TYPEMASK) == FLASH_MXLV320T) ||
 385             ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT)) {
 386                 return flash_erase_2(info, s_first, s_last);
 387         } else {
 388                 return flash_erase_1(info, s_first, s_last);
 389         }
 390 }
 391
 392 static int flash_erase_1(flash_info_t * info, int s_first, int s_last)
 393 #else
 394 int flash_erase(flash_info_t * info, int s_first, int s_last)
 395 #endif
 396 {
 397         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 398         volatile CFG_FLASH_WORD_SIZE *addr2;
 399         int flag, prot, sect, l_sect;
 400         int i;
 401
 402         if ((s_first < 0) || (s_first > s_last)) {
 403                 if (info->flash_id == FLASH_UNKNOWN) {
 404                         printf("- missing\n");
 405                 } else {
 406                         printf("- no sectors to erase\n");
 407                 }
 408                 return 1;
 409         }
 410
 411         if (info->flash_id == FLASH_UNKNOWN) {
 412                 printf("Can't erase unknown flash type - aborted\n");
 413                 return 1;
 414         }
 415
 416         prot = 0;
 417         for (sect = s_first; sect <= s_last; ++sect) {
 418                 if (info->protect[sect]) {
 419                         prot++;
 420                 }
 421         }
 422
 423         if (prot) {
 424                 printf("- Warning: %d protected sectors will not be erased!\n",
 425                        prot);
 426         } else {
 427                 printf("\n");
 428         }
 429
 430         l_sect = -1;
 431
 432         /* Disable interrupts which might cause a timeout here */
 433         flag = disable_interrupts();
 434
 435         /* Start erase on unprotected sectors */
 436         for (sect = s_first; sect <= s_last; sect++) {
 437                 if (info->protect[sect] == 0) { /* not protected */
 438                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 439
 440                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 441                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 442                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 443                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 444                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 445                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 446                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050;    /* block erase */
 447                                 for (i = 0; i < 50; i++)
 448                                         udelay(1000);   /* wait 1 ms */
 449                         } else {
 450                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 451                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 452                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 453                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 454                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 455                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
 456                         }
 457                         l_sect = sect;
 458                         /*
 459                          * Wait for each sector to complete, it's more
 460                          * reliable.  According to AMD Spec, you must
 461                          * issue all erase commands within a specified
 462                          * timeout.  This has been seen to fail, especially
 463                          * if printf()s are included (for debug)!!
 464                          */
 465                         wait_for_DQ7_1(info, sect);
 466                 }
 467         }
 468
 469         /* re-enable interrupts if necessary */
 470         if (flag)
 471                 enable_interrupts();
 472
 473         /* wait at least 80us - let's wait 1 ms */
 474         udelay(1000);
 475
 476         /* reset to read mode */
 477         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 478         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
 479
 480         printf(" done\n");
 481         return 0;
 482 }
 483
 484 /*-----------------------------------------------------------------------
 485  * Copy memory to flash, returns:
 486  * 0 - OK
 487  * 1 - write timeout
 488  * 2 - Flash not erased
 489  */
 490 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 491 {
 492         ulong cp, wp, data;
 493         int i, l, rc;
 494
 495         wp = (addr & ~3);       /* get lower word aligned address */
 496
 497         /*
 498          * handle unaligned start bytes
 499          */
 500         if ((l = addr - wp) != 0) {
 501                 data = 0;
 502                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 503                         data = (data << 8) | (*(uchar *) cp);
 504                 }
 505                 for (; i < 4 && cnt > 0; ++i) {
 506                         data = (data << 8) | *src++;
 507                         --cnt;
 508                         ++cp;
 509                 }
 510                 for (; cnt == 0 && i < 4; ++i, ++cp) {
 511                         data = (data << 8) | (*(uchar *) cp);
 512                 }
 513
 514                 if ((rc = write_word(info, wp, data)) != 0) {
 515                         return (rc);
 516                 }
 517                 wp += 4;
 518         }
 519
 520         /*
 521          * handle word aligned part
 522          */
 523         while (cnt >= 4) {
 524                 data = 0;
 525                 for (i = 0; i < 4; ++i) {
 526                         data = (data << 8) | *src++;
 527                 }
 528                 if ((rc = write_word(info, wp, data)) != 0) {
 529                         return (rc);
 530                 }
 531                 wp += 4;
 532                 cnt -= 4;
 533         }
 534
 535         if (cnt == 0) {
 536                 return (0);
 537         }
 538
 539         /*
 540          * handle unaligned tail bytes
 541          */
 542         data = 0;
 543         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 544                 data = (data << 8) | *src++;
 545                 --cnt;
 546         }
 547         for (; i < 4; ++i, ++cp) {
 548                 data = (data << 8) | (*(uchar *) cp);
 549         }
 550
 551         return (write_word(info, wp, data));
 552 }
 553
 554 /*-----------------------------------------------------------------------
 555  * Copy memory to flash, returns:
 556  * 0 - OK
 557  * 1 - write timeout
 558  * 2 - Flash not erased
 559  */
 560 #ifdef CFG_FLASH_2ND_16BIT_DEV
 561 static int write_word(flash_info_t * info, ulong dest, ulong data)
 562 {
 563         if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 564             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 565             ((info->flash_id & FLASH_TYPEMASK) == FLASH_MXLV320T) ||
 566             ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT)) {
 567                 return write_word_2(info, dest, data);
 568         } else {
 569                 return write_word_1(info, dest, data);
 570         }
 571 }
 572
 573 static int write_word_1(flash_info_t * info, ulong dest, ulong data)
 574 #else
 575 static int write_word(flash_info_t * info, ulong dest, ulong data)
 576 #endif
 577 {
 578         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 579         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 580         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 581         ulong start;
 582         int i;
 583
 584         /* Check if Flash is (sufficiently) erased */
 585         if ((*((vu_long *)dest) & data) != data) {
 586                 return (2);
 587         }
 588
 589         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 590                 int flag;
 591
 592                 /* Disable interrupts which might cause a timeout here */
 593                 flag = disable_interrupts();
 594
 595                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 596                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 597                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
 598
 599                 dest2[i] = data2[i];
 600
 601                 /* re-enable interrupts if necessary */
 602                 if (flag)
 603                         enable_interrupts();
 604
 605                 /* data polling for D7 */
 606                 start = get_timer(0);
 607                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 608                        (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
 609
 610                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 611                                 return (1);
 612                         }
 613                 }
 614         }
 615
 616         return (0);
 617 }
 618
 619 #ifdef CFG_FLASH_2ND_16BIT_DEV
 620
 621 #undef  CFG_FLASH_WORD_SIZE
 622 #define CFG_FLASH_WORD_SIZE unsigned short
 623
 624 /*
 625  * The following code cannot be run from FLASH!
 626  */
 627 static ulong flash_get_size_2(vu_long * addr, flash_info_t * info)
 628 {
 629         short i;
 630         int n;
 631         CFG_FLASH_WORD_SIZE value;
 632         ulong base = (ulong) addr;
 633         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
 634
 635         DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
 636
 637         /* Write auto select command: read Manufacturer ID */
 638         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 639         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 640         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
 641         udelay(1000);
 642
 643         value = addr2[0];
 644         DEBUGF("FLASH MANUFACT: %x\n", value);
 645
 646         switch (value) {
 647         case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 648                 info->flash_id = FLASH_MAN_AMD;
 649                 break;
 650         case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
 651                 info->flash_id = FLASH_MAN_FUJ;
 652                 break;
 653         case (CFG_FLASH_WORD_SIZE) SST_MANUFACT:
 654                 info->flash_id = FLASH_MAN_SST;
 655                 break;
 656         case (CFG_FLASH_WORD_SIZE) STM_MANUFACT:
 657                 info->flash_id = FLASH_MAN_STM;
 658                 break;
 659         case (CFG_FLASH_WORD_SIZE) MX_MANUFACT:
 660                 info->flash_id = FLASH_MAN_MX;
 661                 break;
 662         default:
 663                 info->flash_id = FLASH_UNKNOWN;
 664                 info->sector_count = 0;
 665                 info->size = 0;
 666                 return (0);     /* no or unknown flash  */
 667         }
 668
 669         value = addr2[1];       /* device ID */
 670
 671         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 672
 673         switch (value) {
 674
 675         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
 676                 info->flash_id += FLASH_AM320T;
 677                 info->sector_count = 71;
 678                 info->size = 0x00400000;  break;        /* => 4 MiB     */
 679
 680         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
 681                 info->flash_id += FLASH_AM320B;
 682                 info->sector_count = 71;
 683                 info->size = 0x00400000;  break;        /* => 4 MiB     */
 684
 685         case (CFG_FLASH_WORD_SIZE)STM_ID_29W320DT:
 686                 info->flash_id += FLASH_STMW320DT;
 687                 info->sector_count = 67;
 688                 info->size = 0x00400000;  break;        /* => 4 MiB     */
 689
 690         case (CFG_FLASH_WORD_SIZE)MX_ID_LV320T:
 691                 info->flash_id += FLASH_MXLV320T;
 692                 info->sector_count = 71;
 693                 info->size = 0x00400000;
 694                 break;  /* => 4 MB      */
 695
 696         default:
 697                 info->flash_id = FLASH_UNKNOWN;
 698                 return (0);     /* => no or unknown flash */
 699         }
 700
 701         /* set up sector start address table */
 702         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 703             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
 704             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
 705                 for (i = 0; i < info->sector_count; i++)
 706                         info->start[i] = base + (i * 0x00010000);
 707         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT) {
 708                 /* set sector offsets for top boot block type           */
 709                 base += info->size;
 710                 i = info->sector_count;
 711                 /*  1 x 16k boot sector */
 712                 base -= 16 << 10;
 713                 --i;
 714                 info->start[i] = base;
 715                 /*  2 x 8k  boot sectors */
 716                 for (n=0; n<2; ++n) {
 717                         base -= 8 << 10;
 718                         --i;
 719                         info->start[i] = base;
 720                 }
 721                 /*  1 x 32k boot sector */
 722                 base -= 32 << 10;
 723                 --i;
 724                 info->start[i] = base;
 725
 726                 while (i > 0) {                 /* 64k regular sectors  */
 727                         base -= 64 << 10;
 728                         --i;
 729                         info->start[i] = base;
 730                 }
 731         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_MXLV320T) {
 732                 i = info->sector_count - 1;
 733                 info->start[i--] = base + info->size - 0x00002000;
 734                 info->start[i--] = base + info->size - 0x00004000;
 735                 info->start[i--] = base + info->size - 0x00006000;
 736                 info->start[i--] = base + info->size - 0x00008000;
 737                 info->start[i--] = base + info->size - 0x0000a000;
 738                 info->start[i--] = base + info->size - 0x0000c000;
 739                 info->start[i--] = base + info->size - 0x0000e000;
 740                 info->start[i--] = base + info->size - 0x00010000;
 741
 742                 for (; i >= 0; i--)
 743                         info->start[i] = base + i * 0x00010000;
 744         } else {
 745                 if (info->flash_id & FLASH_BTYPE) {
 746                         /* set sector offsets for bottom boot block type */
 747                         info->start[0] = base + 0x00000000;
 748                         info->start[1] = base + 0x00004000;
 749                         info->start[2] = base + 0x00006000;
 750                         info->start[3] = base + 0x00008000;
 751                         for (i = 4; i < info->sector_count; i++) {
 752                                 info->start[i] =
 753                                     base + (i * 0x00010000) - 0x00030000;
 754                         }
 755                 } else {
 756                         /* set sector offsets for top boot block type */
 757                         i = info->sector_count - 1;
 758                         info->start[i--] = base + info->size - 0x00004000;
 759                         info->start[i--] = base + info->size - 0x00006000;
 760                         info->start[i--] = base + info->size - 0x00008000;
 761                         for (; i >= 0; i--) {
 762                                 info->start[i] = base + i * 0x00010000;
 763                         }
 764                 }
 765         }
 766
 767         /* check for protected sectors */
 768         for (i = 0; i < info->sector_count; i++) {
 769                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 770                 /* D0 = 1 if protected */
 771                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 772
 773                 /* For AMD29033C flash we need to resend the command of *
 774                  * reading flash protection for upper 8 Mb of flash     */
 775                 if (i == 32) {
 776                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA;
 777                         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555;
 778                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090;
 779                 }
 780
 781                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 782                         info->protect[i] = 0;
 783                 else
 784                         info->protect[i] = addr2[2] & 1;
 785         }
 786
 787         /* issue bank reset to return to read mode */
 788         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
 789
 790         return (info->size);
 791 }
 792
 793 static int wait_for_DQ7_2(flash_info_t * info, int sect)
 794 {
 795         ulong start, now, last;
 796         volatile CFG_FLASH_WORD_SIZE *addr =
 797             (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 798
 799         start = get_timer(0);
 800         last = start;
 801         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 802                (CFG_FLASH_WORD_SIZE) 0x00800080) {
 803                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 804                         printf("Timeout\n");
 805                         return -1;
 806                 }
 807                 /* show that we're waiting */
 808                 if ((now - last) > 1000) {      /* every second */
 809                         putc('.');
 810                         last = now;
 811                 }
 812         }
 813         return 0;
 814 }
 815
 816 static int flash_erase_2(flash_info_t * info, int s_first, int s_last)
 817 {
 818         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 819         volatile CFG_FLASH_WORD_SIZE *addr2;
 820         int flag, prot, sect, l_sect;
 821         int i;
 822
 823         if ((s_first < 0) || (s_first > s_last)) {
 824                 if (info->flash_id == FLASH_UNKNOWN) {
 825                         printf("- missing\n");
 826                 } else {
 827                         printf("- no sectors to erase\n");
 828                 }
 829                 return 1;
 830         }
 831
 832         if (info->flash_id == FLASH_UNKNOWN) {
 833                 printf("Can't erase unknown flash type - aborted\n");
 834                 return 1;
 835         }
 836
 837         prot = 0;
 838         for (sect = s_first; sect <= s_last; ++sect) {
 839                 if (info->protect[sect]) {
 840                         prot++;
 841                 }
 842         }
 843
 844         if (prot) {
 845                 printf("- Warning: %d protected sectors will not be erased!\n",
 846                        prot);
 847         } else {
 848                 printf("\n");
 849         }
 850
 851         l_sect = -1;
 852
 853         /* Disable interrupts which might cause a timeout here */
 854         flag = disable_interrupts();
 855
 856         /* Start erase on unprotected sectors */
 857         for (sect = s_first; sect <= s_last; sect++) {
 858                 if (info->protect[sect] == 0) { /* not protected */
 859                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 860
 861                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 862                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 863                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 864                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 865                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 866                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 867                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050;    /* block erase */
 868                                 for (i = 0; i < 50; i++)
 869                                         udelay(1000);   /* wait 1 ms */
 870                         } else {
 871                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 872                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 873                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 874                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 875                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 876                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
 877                         }
 878                         l_sect = sect;
 879                         /*
 880                          * Wait for each sector to complete, it's more
 881                          * reliable.  According to AMD Spec, you must
 882                          * issue all erase commands within a specified
 883                          * timeout.  This has been seen to fail, especially
 884                          * if printf()s are included (for debug)!!
 885                          */
 886                         wait_for_DQ7_2(info, sect);
 887                 }
 888         }
 889
 890         /* re-enable interrupts if necessary */
 891         if (flag)
 892                 enable_interrupts();
 893
 894         /* wait at least 80us - let's wait 1 ms */
 895         udelay(1000);
 896
 897         /* reset to read mode */
 898         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 899         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
 900
 901         printf(" done\n");
 902         return 0;
 903 }
 904
 905 static int write_word_2(flash_info_t * info, ulong dest, ulong data)
 906 {
 907         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 908         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 909         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 910         ulong start;
 911         int i;
 912
 913         /* Check if Flash is (sufficiently) erased */
 914         if ((*((vu_long *)dest) & data) != data) {
 915                 return (2);
 916         }
 917
 918         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 919                 int flag;
 920
 921                 /* Disable interrupts which might cause a timeout here */
 922                 flag = disable_interrupts();
 923
 924                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 925                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 926                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
 927
 928                 dest2[i] = data2[i];
 929
 930                 /* re-enable interrupts if necessary */
 931                 if (flag)
 932                         enable_interrupts();
 933
 934                 /* data polling for D7 */
 935                 start = get_timer(0);
 936                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 937                        (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
 938
 939                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 940                                 return (1);
 941                         }
 942                 }
 943         }
 944
 945         return (0);
 946 }
 947 #endif /* CFG_FLASH_2ND_16BIT_DEV */