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         default:
  80                 printf("Unknown Vendor ");
  81                 break;
  82         }
  83
  84         switch (info->flash_id & FLASH_TYPEMASK) {
  85         case FLASH_AM040:
  86                 printf("AM29F040 (512 Kbit, uniform sector size)\n");
  87                 break;
  88         case FLASH_AM400B:
  89                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
  90                 break;
  91         case FLASH_AM400T:
  92                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
  93                 break;
  94         case FLASH_AM800B:
  95                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
  96                 break;
  97         case FLASH_AM800T:
  98                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
  99                 break;
 100         case FLASH_AMD016:
 101                 printf("AM29F016D (16 Mbit, uniform sector size)\n");
 102                 break;
 103         case FLASH_AM160B:
 104                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 105                 break;
 106         case FLASH_AM160T:
 107                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 108                 break;
 109         case FLASH_AM320B:
 110                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 111                 break;
 112         case FLASH_AM320T:
 113                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 114                 break;
 115         case FLASH_AM033C:
 116                 printf("AM29LV033C (32 Mbit, top boot sector)\n");
 117                 break;
 118         case FLASH_SST800A:
 119                 printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 120                 break;
 121         case FLASH_SST160A:
 122                 printf("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 123                 break;
 124         case FLASH_STMW320DT:
 125                 printf ("M29W320DT (32 M, top sector)\n");
 126                 break;
 127         default:
 128                 printf("Unknown Chip Type\n");
 129                 break;
 130         }
 131
 132         printf("  Size: %ld KB in %d Sectors\n",
 133                info->size >> 10, info->sector_count);
 134
 135         printf("  Sector Start Addresses:");
 136         for (i = 0; i < info->sector_count; ++i) {
 137                 /*
 138                  * Check if whole sector is erased
 139                  */
 140                 if (i != (info->sector_count - 1))
 141                         size = info->start[i + 1] - info->start[i];
 142                 else
 143                         size = info->start[0] + info->size - info->start[i];
 144                 erased = 1;
 145                 flash = (volatile unsigned long *)info->start[i];
 146                 size = size >> 2;       /* divide by 4 for longword access */
 147                 for (k = 0; k < size; k++) {
 148                         if (*flash++ != 0xffffffff) {
 149                                 erased = 0;
 150                                 break;
 151                         }
 152                 }
 153
 154                 if ((i % 5) == 0)
 155                         printf("\n   ");
 156                 printf(" %08lX%s%s",
 157                        info->start[i],
 158                        erased ? " E" : "  ", info->protect[i] ? "RO " : "   ");
 159         }
 160         printf("\n");
 161         return;
 162 }
 163
 164
 165 /*
 166  * The following code cannot be run from FLASH!
 167  */
 168 #ifdef CFG_FLASH_2ND_16BIT_DEV
 169 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 170 {
 171         /* bit 0 used for big flash marking */
 172         if ((ulong)addr & 0x1) {
 173                 return flash_get_size_2((vu_long *)((ulong)addr & 0xfffffffe), info);
 174         } else {
 175                 return flash_get_size_1(addr, info);
 176         }
 177 }
 178
 179 static ulong flash_get_size_1(vu_long * addr, flash_info_t * info)
 180 #else
 181 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 182 #endif
 183 {
 184         short i;
 185         CFG_FLASH_WORD_SIZE value;
 186         ulong base = (ulong) addr;
 187         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
 188
 189         DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
 190
 191         /* Write auto select command: read Manufacturer ID */
 192         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 193         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 194         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
 195         udelay(1000);
 196
 197         value = addr2[0];
 198         DEBUGF("FLASH MANUFACT: %x\n", value);
 199
 200         switch (value) {
 201         case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 202                 info->flash_id = FLASH_MAN_AMD;
 203                 break;
 204         case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
 205                 info->flash_id = FLASH_MAN_FUJ;
 206                 break;
 207         case (CFG_FLASH_WORD_SIZE) SST_MANUFACT:
 208                 info->flash_id = FLASH_MAN_SST;
 209                 break;
 210         case (CFG_FLASH_WORD_SIZE) STM_MANUFACT:
 211                 info->flash_id = FLASH_MAN_STM;
 212                 break;
 213         default:
 214                 info->flash_id = FLASH_UNKNOWN;
 215                 info->sector_count = 0;
 216                 info->size = 0;
 217                 return (0);     /* no or unknown flash  */
 218         }
 219
 220         value = addr2[1];       /* device ID            */
 221         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 222
 223         switch (value) {
 224         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV040B:
 225                 info->flash_id += FLASH_AM040;
 226                 info->sector_count = 8;
 227                 info->size = 0x0080000; /* => 512 ko */
 228                 break;
 229
 230         case (CFG_FLASH_WORD_SIZE) AMD_ID_F040B:
 231                 info->flash_id += FLASH_AM040;
 232                 info->sector_count = 8;
 233                 info->size = 0x0080000; /* => 512 ko */
 234                 break;
 235
 236         case (CFG_FLASH_WORD_SIZE) STM_ID_M29W040B:
 237                 info->flash_id += FLASH_AM040;
 238                 info->sector_count = 8;
 239                 info->size = 0x0080000; /* => 512 ko */
 240                 break;
 241
 242         case (CFG_FLASH_WORD_SIZE) AMD_ID_F016D:
 243                 info->flash_id += FLASH_AMD016;
 244                 info->sector_count = 32;
 245                 info->size = 0x00200000;
 246                 break;          /* => 2 MB              */
 247
 248         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV033C:
 249                 info->flash_id += FLASH_AMDLV033C;
 250                 info->sector_count = 64;
 251                 info->size = 0x00400000;
 252                 break;          /* => 4 MB              */
 253
 254         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400T:
 255                 info->flash_id += FLASH_AM400T;
 256                 info->sector_count = 11;
 257                 info->size = 0x00080000;
 258                 break;          /* => 0.5 MB            */
 259
 260         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400B:
 261                 info->flash_id += FLASH_AM400B;
 262                 info->sector_count = 11;
 263                 info->size = 0x00080000;
 264                 break;          /* => 0.5 MB            */
 265
 266         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800T:
 267                 info->flash_id += FLASH_AM800T;
 268                 info->sector_count = 19;
 269                 info->size = 0x00100000;
 270                 break;          /* => 1 MB              */
 271
 272         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800B:
 273                 info->flash_id += FLASH_AM800B;
 274                 info->sector_count = 19;
 275                 info->size = 0x00100000;
 276                 break;          /* => 1 MB              */
 277
 278         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160T:
 279                 info->flash_id += FLASH_AM160T;
 280                 info->sector_count = 35;
 281                 info->size = 0x00200000;
 282                 break;          /* => 2 MB              */
 283
 284         case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160B:
 285                 info->flash_id += FLASH_AM160B;
 286                 info->sector_count = 35;
 287                 info->size = 0x00200000;
 288                 break;          /* => 2 MB              */
 289
 290         default:
 291                 info->flash_id = FLASH_UNKNOWN;
 292                 return (0);     /* => no or unknown flash */
 293         }
 294
 295         /* set up sector start address table */
 296         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 297             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
 298             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
 299                 for (i = 0; i < info->sector_count; i++)
 300                         info->start[i] = base + (i * 0x00010000);
 301         } else {
 302                 if (info->flash_id & FLASH_BTYPE) {
 303                         /* set sector offsets for bottom boot block type        */
 304                         info->start[0] = base + 0x00000000;
 305                         info->start[1] = base + 0x00004000;
 306                         info->start[2] = base + 0x00006000;
 307                         info->start[3] = base + 0x00008000;
 308                         for (i = 4; i < info->sector_count; i++) {
 309                                 info->start[i] =
 310                                     base + (i * 0x00010000) - 0x00030000;
 311                         }
 312                 } else {
 313                         /* set sector offsets for top boot block type           */
 314                         i = info->sector_count - 1;
 315                         info->start[i--] = base + info->size - 0x00004000;
 316                         info->start[i--] = base + info->size - 0x00006000;
 317                         info->start[i--] = base + info->size - 0x00008000;
 318                         for (; i >= 0; i--) {
 319                                 info->start[i] = base + i * 0x00010000;
 320                         }
 321                 }
 322         }
 323
 324         /* check for protected sectors */
 325         for (i = 0; i < info->sector_count; i++) {
 326                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 327                 /* D0 = 1 if protected */
 328                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 329
 330                 /* For AMD29033C flash we need to resend the command of *
 331                  * reading flash protection for upper 8 Mb of flash     */
 332                 if (i == 32) {
 333                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA;
 334                         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555;
 335                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090;
 336                 }
 337
 338                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 339                         info->protect[i] = 0;
 340                 else
 341                         info->protect[i] = addr2[2] & 1;
 342         }
 343
 344         /* issue bank reset to return to read mode */
 345         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
 346
 347         return (info->size);
 348 }
 349
 350 static int wait_for_DQ7_1(flash_info_t * info, int sect)
 351 {
 352         ulong start, now, last;
 353         volatile CFG_FLASH_WORD_SIZE *addr =
 354             (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 355
 356         start = get_timer(0);
 357         last = start;
 358         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 359                (CFG_FLASH_WORD_SIZE) 0x00800080) {
 360                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 361                         printf("Timeout\n");
 362                         return -1;
 363                 }
 364                 /* show that we're waiting */
 365                 if ((now - last) > 1000) {      /* every second */
 366                         putc('.');
 367                         last = now;
 368                 }
 369         }
 370         return 0;
 371 }
 372
 373 #ifdef CFG_FLASH_2ND_16BIT_DEV
 374 int flash_erase(flash_info_t * info, int s_first, int s_last)
 375 {
 376         if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 377             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 378             ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT)) {
 379                 return flash_erase_2(info, s_first, s_last);
 380         } else {
 381                 return flash_erase_1(info, s_first, s_last);
 382         }
 383 }
 384
 385 static int flash_erase_1(flash_info_t * info, int s_first, int s_last)
 386 #else
 387 int flash_erase(flash_info_t * info, int s_first, int s_last)
 388 #endif
 389 {
 390         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 391         volatile CFG_FLASH_WORD_SIZE *addr2;
 392         int flag, prot, sect, l_sect;
 393         int i;
 394
 395         if ((s_first < 0) || (s_first > s_last)) {
 396                 if (info->flash_id == FLASH_UNKNOWN) {
 397                         printf("- missing\n");
 398                 } else {
 399                         printf("- no sectors to erase\n");
 400                 }
 401                 return 1;
 402         }
 403
 404         if (info->flash_id == FLASH_UNKNOWN) {
 405                 printf("Can't erase unknown flash type - aborted\n");
 406                 return 1;
 407         }
 408
 409         prot = 0;
 410         for (sect = s_first; sect <= s_last; ++sect) {
 411                 if (info->protect[sect]) {
 412                         prot++;
 413                 }
 414         }
 415
 416         if (prot) {
 417                 printf("- Warning: %d protected sectors will not be erased!\n",
 418                        prot);
 419         } else {
 420                 printf("\n");
 421         }
 422
 423         l_sect = -1;
 424
 425         /* Disable interrupts which might cause a timeout here */
 426         flag = disable_interrupts();
 427
 428         /* Start erase on unprotected sectors */
 429         for (sect = s_first; sect <= s_last; sect++) {
 430                 if (info->protect[sect] == 0) { /* not protected */
 431                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 432
 433                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 434                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 435                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 436                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 437                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 438                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 439                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050;    /* block erase */
 440                                 for (i = 0; i < 50; i++)
 441                                         udelay(1000);   /* wait 1 ms */
 442                         } else {
 443                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 444                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 445                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 446                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 447                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 448                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
 449                         }
 450                         l_sect = sect;
 451                         /*
 452                          * Wait for each sector to complete, it's more
 453                          * reliable.  According to AMD Spec, you must
 454                          * issue all erase commands within a specified
 455                          * timeout.  This has been seen to fail, especially
 456                          * if printf()s are included (for debug)!!
 457                          */
 458                         wait_for_DQ7_1(info, sect);
 459                 }
 460         }
 461
 462         /* re-enable interrupts if necessary */
 463         if (flag)
 464                 enable_interrupts();
 465
 466         /* wait at least 80us - let's wait 1 ms */
 467         udelay(1000);
 468
 469         /* reset to read mode */
 470         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 471         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
 472
 473         printf(" done\n");
 474         return 0;
 475 }
 476
 477 /*-----------------------------------------------------------------------
 478  * Copy memory to flash, returns:
 479  * 0 - OK
 480  * 1 - write timeout
 481  * 2 - Flash not erased
 482  */
 483 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 484 {
 485         ulong cp, wp, data;
 486         int i, l, rc;
 487
 488         wp = (addr & ~3);       /* get lower word aligned address */
 489
 490         /*
 491          * handle unaligned start bytes
 492          */
 493         if ((l = addr - wp) != 0) {
 494                 data = 0;
 495                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 496                         data = (data << 8) | (*(uchar *) cp);
 497                 }
 498                 for (; i < 4 && cnt > 0; ++i) {
 499                         data = (data << 8) | *src++;
 500                         --cnt;
 501                         ++cp;
 502                 }
 503                 for (; cnt == 0 && i < 4; ++i, ++cp) {
 504                         data = (data << 8) | (*(uchar *) cp);
 505                 }
 506
 507                 if ((rc = write_word(info, wp, data)) != 0) {
 508                         return (rc);
 509                 }
 510                 wp += 4;
 511         }
 512
 513         /*
 514          * handle word aligned part
 515          */
 516         while (cnt >= 4) {
 517                 data = 0;
 518                 for (i = 0; i < 4; ++i) {
 519                         data = (data << 8) | *src++;
 520                 }
 521                 if ((rc = write_word(info, wp, data)) != 0) {
 522                         return (rc);
 523                 }
 524                 wp += 4;
 525                 cnt -= 4;
 526         }
 527
 528         if (cnt == 0) {
 529                 return (0);
 530         }
 531
 532         /*
 533          * handle unaligned tail bytes
 534          */
 535         data = 0;
 536         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 537                 data = (data << 8) | *src++;
 538                 --cnt;
 539         }
 540         for (; i < 4; ++i, ++cp) {
 541                 data = (data << 8) | (*(uchar *) cp);
 542         }
 543
 544         return (write_word(info, wp, data));
 545 }
 546
 547 /*-----------------------------------------------------------------------
 548  * Copy memory to flash, returns:
 549  * 0 - OK
 550  * 1 - write timeout
 551  * 2 - Flash not erased
 552  */
 553 #ifdef CFG_FLASH_2ND_16BIT_DEV
 554 static int write_word(flash_info_t * info, ulong dest, ulong data)
 555 {
 556         if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
 557             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
 558             ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT)) {
 559                 return write_word_2(info, dest, data);
 560         } else {
 561                 return write_word_1(info, dest, data);
 562         }
 563 }
 564
 565 static int write_word_1(flash_info_t * info, ulong dest, ulong data)
 566 #else
 567 static int write_word(flash_info_t * info, ulong dest, ulong data)
 568 #endif
 569 {
 570         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 571         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 572         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 573         ulong start;
 574         int i;
 575
 576         /* Check if Flash is (sufficiently) erased */
 577         if ((*((vu_long *)dest) & data) != data) {
 578                 return (2);
 579         }
 580
 581         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 582                 int flag;
 583
 584                 /* Disable interrupts which might cause a timeout here */
 585                 flag = disable_interrupts();
 586
 587                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 588                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 589                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
 590
 591                 dest2[i] = data2[i];
 592
 593                 /* re-enable interrupts if necessary */
 594                 if (flag)
 595                         enable_interrupts();
 596
 597                 /* data polling for D7 */
 598                 start = get_timer(0);
 599                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 600                        (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
 601
 602                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 603                                 return (1);
 604                         }
 605                 }
 606         }
 607
 608         return (0);
 609 }
 610
 611 #ifdef CFG_FLASH_2ND_16BIT_DEV
 612
 613 #undef  CFG_FLASH_WORD_SIZE
 614 #define CFG_FLASH_WORD_SIZE unsigned short
 615
 616 /*
 617  * The following code cannot be run from FLASH!
 618  */
 619 static ulong flash_get_size_2(vu_long * addr, flash_info_t * info)
 620 {
 621         short i;
 622         int n;
 623         CFG_FLASH_WORD_SIZE value;
 624         ulong base = (ulong) addr;
 625         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
 626
 627         DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
 628
 629         /* Write auto select command: read Manufacturer ID */
 630         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 631         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 632         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
 633         udelay(1000);
 634
 635         value = addr2[0];
 636         DEBUGF("FLASH MANUFACT: %x\n", value);
 637
 638         switch (value) {
 639         case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
 640                 info->flash_id = FLASH_MAN_AMD;
 641                 break;
 642         case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
 643                 info->flash_id = FLASH_MAN_FUJ;
 644                 break;
 645         case (CFG_FLASH_WORD_SIZE) SST_MANUFACT:
 646                 info->flash_id = FLASH_MAN_SST;
 647                 break;
 648         case (CFG_FLASH_WORD_SIZE) STM_MANUFACT:
 649                 info->flash_id = FLASH_MAN_STM;
 650                 break;
 651         default:
 652                 info->flash_id = FLASH_UNKNOWN;
 653                 info->sector_count = 0;
 654                 info->size = 0;
 655                 return (0);     /* no or unknown flash  */
 656         }
 657
 658         value = addr2[1];       /* device ID            */
 659
 660         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 661
 662         switch (value) {
 663
 664         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320T:
 665                 info->flash_id += FLASH_AM320T;
 666                 info->sector_count = 71;
 667                 info->size = 0x00400000;  break;        /* => 4 MB      */
 668
 669         case (CFG_FLASH_WORD_SIZE)AMD_ID_LV320B:
 670                 info->flash_id += FLASH_AM320B;
 671                 info->sector_count = 71;
 672                 info->size = 0x00400000;  break;        /* => 4 MB      */
 673
 674         case (CFG_FLASH_WORD_SIZE)STM_ID_29W320DT:
 675                 info->flash_id += FLASH_STMW320DT;
 676                 info->sector_count = 67;
 677                 info->size = 0x00400000;  break;        /* => 4 MB      */
 678
 679         default:
 680                 info->flash_id = FLASH_UNKNOWN;
 681                 return (0);     /* => no or unknown flash */
 682         }
 683
 684         /* set up sector start address table */
 685         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 686             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
 687             ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
 688                 for (i = 0; i < info->sector_count; i++)
 689                         info->start[i] = base + (i * 0x00010000);
 690         } else if ((info->flash_id & FLASH_TYPEMASK) == FLASH_STMW320DT) {
 691                 /* set sector offsets for top boot block type           */
 692                 base += info->size;
 693                 i = info->sector_count;
 694                 /*  1 x 16k boot sector */
 695                 base -= 16 << 10;
 696                 --i;
 697                 info->start[i] = base;
 698                 /*  2 x 8k  boot sectors */
 699                 for (n=0; n<2; ++n) {
 700                         base -= 8 << 10;
 701                         --i;
 702                         info->start[i] = base;
 703                 }
 704                 /*  1 x 32k boot sector */
 705                 base -= 32 << 10;
 706                 --i;
 707                 info->start[i] = base;
 708
 709                 while (i > 0) {                 /* 64k regular sectors  */
 710                         base -= 64 << 10;
 711                         --i;
 712                         info->start[i] = base;
 713                 }
 714         } else {
 715                 if (info->flash_id & FLASH_BTYPE) {
 716                         /* set sector offsets for bottom boot block type        */
 717                         info->start[0] = base + 0x00000000;
 718                         info->start[1] = base + 0x00004000;
 719                         info->start[2] = base + 0x00006000;
 720                         info->start[3] = base + 0x00008000;
 721                         for (i = 4; i < info->sector_count; i++) {
 722                                 info->start[i] =
 723                                     base + (i * 0x00010000) - 0x00030000;
 724                         }
 725                 } else {
 726                         /* set sector offsets for top boot block type           */
 727                         i = info->sector_count - 1;
 728                         info->start[i--] = base + info->size - 0x00004000;
 729                         info->start[i--] = base + info->size - 0x00006000;
 730                         info->start[i--] = base + info->size - 0x00008000;
 731                         for (; i >= 0; i--) {
 732                                 info->start[i] = base + i * 0x00010000;
 733                         }
 734                 }
 735         }
 736
 737         /* check for protected sectors */
 738         for (i = 0; i < info->sector_count; i++) {
 739                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 740                 /* D0 = 1 if protected */
 741                 addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
 742
 743                 /* For AMD29033C flash we need to resend the command of *
 744                  * reading flash protection for upper 8 Mb of flash     */
 745                 if (i == 32) {
 746                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA;
 747                         addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555;
 748                         addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090;
 749                 }
 750
 751                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
 752                         info->protect[i] = 0;
 753                 else
 754                         info->protect[i] = addr2[2] & 1;
 755         }
 756
 757         /* issue bank reset to return to read mode */
 758         addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
 759
 760         return (info->size);
 761 }
 762
 763 static int wait_for_DQ7_2(flash_info_t * info, int sect)
 764 {
 765         ulong start, now, last;
 766         volatile CFG_FLASH_WORD_SIZE *addr =
 767             (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 768
 769         start = get_timer(0);
 770         last = start;
 771         while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 772                (CFG_FLASH_WORD_SIZE) 0x00800080) {
 773                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 774                         printf("Timeout\n");
 775                         return -1;
 776                 }
 777                 /* show that we're waiting */
 778                 if ((now - last) > 1000) {      /* every second */
 779                         putc('.');
 780                         last = now;
 781                 }
 782         }
 783         return 0;
 784 }
 785
 786 static int flash_erase_2(flash_info_t * info, int s_first, int s_last)
 787 {
 788         volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 789         volatile CFG_FLASH_WORD_SIZE *addr2;
 790         int flag, prot, sect, l_sect;
 791         int i;
 792
 793         if ((s_first < 0) || (s_first > s_last)) {
 794                 if (info->flash_id == FLASH_UNKNOWN) {
 795                         printf("- missing\n");
 796                 } else {
 797                         printf("- no sectors to erase\n");
 798                 }
 799                 return 1;
 800         }
 801
 802         if (info->flash_id == FLASH_UNKNOWN) {
 803                 printf("Can't erase unknown flash type - aborted\n");
 804                 return 1;
 805         }
 806
 807         prot = 0;
 808         for (sect = s_first; sect <= s_last; ++sect) {
 809                 if (info->protect[sect]) {
 810                         prot++;
 811                 }
 812         }
 813
 814         if (prot) {
 815                 printf("- Warning: %d protected sectors will not be erased!\n",
 816                        prot);
 817         } else {
 818                 printf("\n");
 819         }
 820
 821         l_sect = -1;
 822
 823         /* Disable interrupts which might cause a timeout here */
 824         flag = disable_interrupts();
 825
 826         /* Start erase on unprotected sectors */
 827         for (sect = s_first; sect <= s_last; sect++) {
 828                 if (info->protect[sect] == 0) { /* not protected */
 829                         addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
 830
 831                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 832                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 833                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 834                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 835                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 836                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 837                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050;    /* block erase */
 838                                 for (i = 0; i < 50; i++)
 839                                         udelay(1000);   /* wait 1 ms */
 840                         } else {
 841                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 842                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 843                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
 844                                 addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 845                                 addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 846                                 addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030;    /* sector erase */
 847                         }
 848                         l_sect = sect;
 849                         /*
 850                          * Wait for each sector to complete, it's more
 851                          * reliable.  According to AMD Spec, you must
 852                          * issue all erase commands within a specified
 853                          * timeout.  This has been seen to fail, especially
 854                          * if printf()s are included (for debug)!!
 855                          */
 856                         wait_for_DQ7_2(info, sect);
 857                 }
 858         }
 859
 860         /* re-enable interrupts if necessary */
 861         if (flag)
 862                 enable_interrupts();
 863
 864         /* wait at least 80us - let's wait 1 ms */
 865         udelay(1000);
 866
 867         /* reset to read mode */
 868         addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
 869         addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;     /* reset bank */
 870
 871         printf(" done\n");
 872         return 0;
 873 }
 874
 875 static int write_word_2(flash_info_t * info, ulong dest, ulong data)
 876 {
 877         volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
 878         volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
 879         volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
 880         ulong start;
 881         int i;
 882
 883         /* Check if Flash is (sufficiently) erased */
 884         if ((*((vu_long *)dest) & data) != data) {
 885                 return (2);
 886         }
 887
 888         for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
 889                 int flag;
 890
 891                 /* Disable interrupts which might cause a timeout here */
 892                 flag = disable_interrupts();
 893
 894                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
 895                 addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
 896                 addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
 897
 898                 dest2[i] = data2[i];
 899
 900                 /* re-enable interrupts if necessary */
 901                 if (flag)
 902                         enable_interrupts();
 903
 904                 /* data polling for D7 */
 905                 start = get_timer(0);
 906                 while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
 907                        (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
 908
 909                         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 910                                 return (1);
 911                         }
 912                 }
 913         }
 914
 915         return (0);
 916 }
 917 #endif /* CFG_FLASH_2ND_16BIT_DEV */