board/mousse/flash.c

   1 /*
   2  * MOUSSE/MPC8240 Board definitions.
   3  * Flash Routines for MOUSSE onboard AMD29LV106DB devices
   4  *
   5  * (C) Copyright 2000
   6  * Marius Groeger <mgroeger@sysgo.de>
   7  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   8  *
   9  * (C) Copyright 2000
  10  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  11  *
  12  * (C) Copyright 1999, by Curt McDowell, 08-06-99, Broadcom Corp.
  13  * (C) Copyright 2001, James Dougherty, 07/18/01, Broadcom Corp.
  14  *
  15  * See file CREDITS for list of people who contributed to this
  16  * project.
  17  *
  18  * This program is free software; you can redistribute it and/or
  19  * modify it under the terms of the GNU General Public License as
  20  * published by the Free Software Foundation; either version 2 of
  21  * the License, or (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  31  * MA 02111-1307 USA
  32  */
  33
  34 #include <common.h>
  35 #include <mpc8xx.h>
  36 #include <malloc.h>
  37 #include "mousse.h"
  38 #include "flash.h"
  39
  40 int flashLibDebug = 0;
  41 int flashLibInited = 0;
  42
  43 #define OK  0
  44 #define ERROR -1
  45 #define STATUS int
  46 #define PRINTF                  if (flashLibDebug) printf
  47 #if 0
  48 #define PRIVATE                 static
  49 #else
  50 #define PRIVATE
  51 #endif
  52
  53 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
  54
  55 #define SLEEP_DELAY    166
  56 #define FLASH_SECTOR_SIZE   (64*1024)
  57 /***********************************************************************
  58  *
  59  * Virtual Flash Devices on Mousse board
  60  *
  61  * These must be kept in sync with the definitions in flashLib.h.
  62  *
  63  ***********************************************************************/
  64
  65 PRIVATE flash_dev_t flashDev[] = {
  66     /* Bank 0 sector SA0 (16 kB) */
  67     {   "SA0",FLASH0_BANK, FLASH0_SEG0_START, 1, 14,
  68         FLASH0_VENDOR_ID, FLASH0_DEVICE_ID
  69     },
  70     /* Bank 0 sector SA1 (8 kB) */
  71     {   "SA1", FLASH0_BANK, FLASH0_SEG0_START + 0x4000, 1, 13,
  72         FLASH0_VENDOR_ID, FLASH0_DEVICE_ID
  73     },
  74     /* Bank 0 sector SA2 (8 kB) */
  75     {   "SA2", FLASH0_BANK, FLASH0_SEG0_START + 0x6000, 1, 13,
  76         FLASH0_VENDOR_ID, FLASH0_DEVICE_ID
  77     },
  78     /* Bank 0 sector SA3 is occluded by Mousse I/O devices */
  79     /* Bank 0 sectors SA4-SA18, after Mousse devices up to PLCC (960 kB)  */
  80     {   "KERNEL", FLASH0_BANK, FLASH0_SEG1_START, 15, 16,
  81         FLASH0_VENDOR_ID, FLASH0_DEVICE_ID
  82     },
  83     /* Bank 0 sectors SA19-SA26, jumper can occlude this by PLCC (512 kB) */
  84     /* This is where the Kahlua boot vector and boot ROM code resides. */
  85     {   "BOOT",FLASH0_BANK, FLASH0_SEG2_START, 8, 16,
  86         FLASH0_VENDOR_ID, FLASH0_DEVICE_ID
  87     },
  88     /* Bank 0 sectors SA27-SA34 (512 kB) */
  89     {   "RAMDISK",FLASH0_BANK, FLASH0_SEG3_START, 8, 16,
  90         FLASH0_VENDOR_ID, FLASH0_DEVICE_ID
  91     },
  92 };
  93
  94 int flashDevCount = (sizeof (flashDev) / sizeof (flashDev[0]));
  95
  96 #define DEV(no)                 (&flashDev[no])
  97 #define DEV_NO(dev)             ((dev) - flashDev)
  98
  99 /***********************************************************************
 100  *
 101  * Private Flash Routines
 102  *
 103  ***********************************************************************/
 104
 105 /*
 106  * The convention is:
 107  *
 108  * "addr" is always the PROM raw address, which is the address of an
 109  * 8-bit quantity for flash 0 and 16-bit quantity for flash 1.
 110  *
 111  * "pos" is always a logical byte position from the PROM beginning.
 112  */
 113
 114 #define FLASH0_ADDR(dev, addr) \
 115         ((unsigned char *) ((dev)->base + (addr)))
 116
 117 #define FLASH0_WRITE(dev, addr, value) \
 118         (*FLASH0_ADDR(dev, addr) = (value))
 119
 120 #define FLASH0_READ(dev, addr) \
 121         (*FLASH0_ADDR(dev, addr))
 122
 123 PRIVATE int flashCheck (flash_dev_t * dev)
 124 {
 125         if (!flashLibInited) {
 126                 printf ("flashCheck: flashLib not initialized\n");
 127                 return ERROR;
 128         }
 129
 130         if (dev < &flashDev[0] || dev >= &flashDev[flashDevCount]) {
 131                 printf ("flashCheck: Bad dev parameter\n");
 132                 return ERROR;
 133         }
 134
 135         if (!dev->found) {
 136                 printf ("flashCheck: Device %d not available\n", DEV_NO (dev));
 137                 return ERROR;
 138         }
 139
 140         return OK;
 141 }
 142
 143 PRIVATE void flashReset (flash_dev_t * dev)
 144 {
 145         PRINTF ("flashReset: dev=%d\n", DEV_NO (dev));
 146
 147         if (dev->bank == FLASH0_BANK) {
 148                 FLASH0_WRITE (dev, 0x555, 0xaa);
 149                 FLASH0_WRITE (dev, 0xaaa, 0x55);
 150                 FLASH0_WRITE (dev, 0x555, 0xf0);
 151         }
 152
 153         udelay (SLEEP_DELAY);
 154
 155         PRINTF ("flashReset: done\n");
 156 }
 157
 158 PRIVATE int flashProbe (flash_dev_t * dev)
 159 {
 160         int rv, deviceID, vendorID;
 161
 162         PRINTF ("flashProbe: dev=%d\n", DEV_NO (dev));
 163
 164         if (dev->bank != FLASH0_BANK) {
 165                 rv = ERROR;
 166                 goto DONE;
 167         }
 168
 169         FLASH0_WRITE (dev, 0xaaa, 0xaa);
 170         FLASH0_WRITE (dev, 0x555, 0x55);
 171         FLASH0_WRITE (dev, 0xaaa, 0x90);
 172
 173         udelay (SLEEP_DELAY);
 174
 175         vendorID = FLASH0_READ (dev, 0);
 176         deviceID = FLASH0_READ (dev, 2);
 177
 178         FLASH0_WRITE (dev, 0, 0xf0);
 179
 180         PRINTF ("flashProbe: vendor=0x%x device=0x%x\n", vendorID, deviceID);
 181
 182         if (vendorID == dev->vendorID && deviceID == dev->deviceID)
 183                 rv = OK;
 184         else
 185                 rv = ERROR;
 186
 187   DONE:
 188         PRINTF ("flashProbe: rv=%d\n", rv);
 189
 190         return rv;
 191 }
 192
 193 PRIVATE int flashWait (flash_dev_t * dev, int addr, int expect, int erase)
 194 {
 195         int rv = ERROR;
 196         int i, data;
 197         int polls;
 198
 199 #if 0
 200         PRINTF ("flashWait: dev=%d addr=0x%x expect=0x%x erase=%d\n",
 201                 DEV_NO (dev), addr, expect, erase);
 202 #endif
 203
 204         if (dev->bank != FLASH0_BANK) {
 205                 rv = ERROR;
 206                 goto done;
 207         }
 208
 209         if (erase)
 210                 polls = FLASH_ERASE_SECTOR_TIMEOUT;     /* Ticks */
 211         else
 212                 polls = FLASH_PROGRAM_POLLS;    /* Loops */
 213
 214         for (i = 0; i < polls; i++) {
 215                 if (erase)
 216                         udelay (SLEEP_DELAY);
 217
 218                 data = FLASH0_READ (dev, addr);
 219
 220                 if (((data ^ expect) & 0x80) == 0) {
 221                         rv = OK;
 222                         goto done;
 223                 }
 224
 225                 if (data & 0x20) {
 226                         /*
 227                          * If the 0x20 bit has come on, it could actually be because
 228                          * the operation succeeded, so check the done bit again.
 229                          */
 230
 231                         data = FLASH0_READ (dev, addr);
 232
 233                         if (((data ^ expect) & 0x80) == 0) {
 234                                 rv = OK;
 235                                 goto done;
 236                         }
 237
 238                         printf ("flashWait: Program error (dev: %d, addr: 0x%x)\n",
 239                                         DEV_NO (dev), addr);
 240
 241                         flashReset (dev);
 242                         rv = ERROR;
 243                         goto done;
 244                 }
 245         }
 246
 247         printf ("flashWait: Timeout %s (dev: %d, addr: 0x%x)\n",
 248                 erase ? "erasing sector" : "programming byte",
 249                 DEV_NO (dev), addr);
 250
 251   done:
 252
 253 #if 0
 254         PRINTF ("flashWait: rv=%d\n", rv);
 255 #endif
 256
 257         return rv;
 258 }
 259
 260 /***********************************************************************
 261  *
 262  * Public Flash Routines
 263  *
 264  ***********************************************************************/
 265
 266 STATUS flashLibInit (void)
 267 {
 268         int i;
 269
 270         PRINTF ("flashLibInit: devices=%d\n", flashDevCount);
 271
 272         for (i = 0; i < flashDevCount; i++) {
 273                 flash_dev_t *dev = &flashDev[i];
 274
 275                 /*
 276                  * For bank 1, probe both without and with byte swappage,
 277                  * so that this module works on both old and new Mousse boards.
 278                  */
 279
 280                 flashReset (dev);
 281
 282                 if (flashProbe (dev) != ERROR)
 283                         dev->found = 1;
 284
 285                 flashReset (dev);
 286
 287                 if (flashProbe (dev) != ERROR)
 288                         dev->found = 1;
 289
 290                 dev->swap = 0;
 291
 292                 if (dev->found) {
 293                         PRINTF ("\n  FLASH %s[%d]: iobase=0x%x - %d sectors %d KB",
 294                                 flashDev[i].name, i, flashDev[i].base,
 295                                 flashDev[i].sectors,
 296                                 (flashDev[i].sectors * FLASH_SECTOR_SIZE) / 1024);
 297
 298                 }
 299         }
 300
 301         flashLibInited = 1;
 302
 303         PRINTF ("flashLibInit: done\n");
 304
 305         return OK;
 306 }
 307
 308 STATUS flashEraseSector (flash_dev_t * dev, int sector)
 309 {
 310         int pos, addr;
 311
 312         PRINTF ("flashErasesector: dev=%d sector=%d\n", DEV_NO (dev), sector);
 313
 314         if (flashCheck (dev) == ERROR)
 315                 return ERROR;
 316
 317         if (sector < 0 || sector >= dev->sectors) {
 318                 printf ("flashEraseSector: Sector out of range (dev: %d, sector: %d)\n", DEV_NO (dev), sector);
 319                 return ERROR;
 320         }
 321
 322         pos = FLASH_SECTOR_POS (dev, sector);
 323
 324         if (dev->bank != FLASH0_BANK) {
 325                 return ERROR;
 326         }
 327
 328         addr = pos;
 329
 330         FLASH0_WRITE (dev, 0xaaa, 0xaa);
 331         FLASH0_WRITE (dev, 0x555, 0x55);
 332         FLASH0_WRITE (dev, 0xaaa, 0x80);
 333         FLASH0_WRITE (dev, 0xaaa, 0xaa);
 334         FLASH0_WRITE (dev, 0x555, 0x55);
 335         FLASH0_WRITE (dev, addr, 0x30);
 336
 337         return flashWait (dev, addr, 0xff, 1);
 338 }
 339
 340 /*
 341  * Note: it takes about as long to flash all sectors together with Chip
 342  * Erase as it does to flash them one at a time (about 30 seconds for 2
 343  * MB).  Also since we want to be able to treat subsets of sectors as if
 344  * they were complete devices, we don't use Chip Erase.
 345  */
 346
 347 STATUS flashErase (flash_dev_t * dev)
 348 {
 349         int sector;
 350
 351         PRINTF ("flashErase: dev=%d sectors=%d\n", DEV_NO (dev), dev->sectors);
 352
 353         if (flashCheck (dev) == ERROR)
 354                 return ERROR;
 355
 356         for (sector = 0; sector < dev->sectors; sector++) {
 357                 if (flashEraseSector (dev, sector) == ERROR)
 358                         return ERROR;
 359         }
 360         return OK;
 361 }
 362
 363 /*
 364  * Read and write bytes
 365  */
 366
 367 STATUS flashRead (flash_dev_t * dev, int pos, char *buf, int len)
 368 {
 369         int addr, words;
 370
 371         PRINTF ("flashRead: dev=%d pos=0x%x buf=0x%x len=0x%x\n",
 372                 DEV_NO (dev), pos, (int) buf, len);
 373
 374         if (flashCheck (dev) == ERROR)
 375                 return ERROR;
 376
 377         if (pos < 0 || len < 0 || pos + len > FLASH_MAX_POS (dev)) {
 378                 printf ("flashRead: Position out of range "
 379                         "(dev: %d, pos: 0x%x, len: 0x%x)\n",
 380                         DEV_NO (dev), pos, len);
 381                 return ERROR;
 382         }
 383
 384         if (len == 0)
 385                 return OK;
 386
 387         if (dev->bank == FLASH0_BANK) {
 388                 addr = pos;
 389                 words = len;
 390
 391                 PRINTF ("flashRead: memcpy(0x%x, 0x%x, 0x%x)\n",
 392                         (int) buf, (int) FLASH0_ADDR (dev, pos), len);
 393
 394                 memcpy (buf, FLASH0_ADDR (dev, addr), words);
 395
 396         }
 397         PRINTF ("flashRead: rv=OK\n");
 398
 399         return OK;
 400 }
 401
 402 STATUS flashWrite (flash_dev_t * dev, int pos, char *buf, int len)
 403 {
 404         int addr, words;
 405
 406         PRINTF ("flashWrite: dev=%d pos=0x%x buf=0x%x len=0x%x\n",
 407                 DEV_NO (dev), pos, (int) buf, len);
 408
 409         if (flashCheck (dev) == ERROR)
 410                 return ERROR;
 411
 412         if (pos < 0 || len < 0 || pos + len > FLASH_MAX_POS (dev)) {
 413                 printf ("flashWrite: Position out of range "
 414                         "(dev: %d, pos: 0x%x, len: 0x%x)\n",
 415                         DEV_NO (dev), pos, len);
 416                 return ERROR;
 417         }
 418
 419         if (len == 0)
 420                 return OK;
 421
 422         if (dev->bank == FLASH0_BANK) {
 423                 unsigned char tmp;
 424
 425                 addr = pos;
 426                 words = len;
 427
 428                 while (words--) {
 429                         tmp = *buf;
 430                         if (~FLASH0_READ (dev, addr) & tmp) {
 431                                 printf ("flashWrite: Attempt to program 0 to 1 "
 432                                         "(dev: %d, addr: 0x%x, data: 0x%x)\n",
 433                                         DEV_NO (dev), addr, tmp);
 434                                 return ERROR;
 435                         }
 436                         FLASH0_WRITE (dev, 0xaaa, 0xaa);
 437                         FLASH0_WRITE (dev, 0x555, 0x55);
 438                         FLASH0_WRITE (dev, 0xaaa, 0xa0);
 439                         FLASH0_WRITE (dev, addr, tmp);
 440                         if (flashWait (dev, addr, tmp, 0) < 0)
 441                                 return ERROR;
 442                         buf++;
 443                         addr++;
 444                 }
 445         }
 446
 447         PRINTF ("flashWrite: rv=OK\n");
 448
 449         return OK;
 450 }
 451
 452 /*
 453  * flashWritable returns TRUE if a range contains all F's.
 454  */
 455
 456 STATUS flashWritable (flash_dev_t * dev, int pos, int len)
 457 {
 458         int addr, words;
 459         int rv = ERROR;
 460
 461         PRINTF ("flashWritable: dev=%d pos=0x%x len=0x%x\n",
 462                         DEV_NO (dev), pos, len);
 463
 464         if (flashCheck (dev) == ERROR)
 465                 goto done;
 466
 467         if (pos < 0 || len < 0 || pos + len > FLASH_MAX_POS (dev)) {
 468                 printf ("flashWritable: Position out of range "
 469                         "(dev: %d, pos: 0x%x, len: 0x%x)\n",
 470                         DEV_NO (dev), pos, len);
 471                 goto done;
 472         }
 473
 474         if (len == 0) {
 475                 rv = 1;
 476                 goto done;
 477         }
 478
 479         if (dev->bank == FLASH0_BANK) {
 480                 addr = pos;
 481                 words = len;
 482
 483                 while (words--) {
 484                         if (FLASH0_READ (dev, addr) != 0xff) {
 485                                 rv = 0;
 486                                 goto done;
 487                         }
 488                         addr++;
 489                 }
 490         }
 491
 492         rv = 1;
 493
 494   done:
 495         PRINTF ("flashWrite: rv=%d\n", rv);
 496         return rv;
 497 }
 498
 499
 500 /*
 501  * NOTE: the below code cannot run from FLASH!!!
 502  */
 503 /***********************************************************************
 504  *
 505  * Flash Diagnostics
 506  *
 507  ***********************************************************************/
 508
 509 STATUS flashDiag (flash_dev_t * dev)
 510 {
 511         unsigned int *buf = 0;
 512         int i, len, sector;
 513         int rv = ERROR;
 514
 515         if (flashCheck (dev) == ERROR)
 516                 return ERROR;
 517
 518         printf ("flashDiag: Testing device %d, "
 519                 "base: 0x%x, %d sectors @ %d kB = %d kB\n",
 520                 DEV_NO (dev), dev->base,
 521                 dev->sectors,
 522                 1 << (dev->lgSectorSize - 10),
 523                 dev->sectors << (dev->lgSectorSize - 10));
 524
 525         len = 1 << dev->lgSectorSize;
 526
 527         printf ("flashDiag: Erasing\n");
 528
 529         if (flashErase (dev) == ERROR) {
 530                 printf ("flashDiag: Erase failed\n");
 531                 goto done;
 532         }
 533         printf ("%d bytes requested ...\n", len);
 534         buf = malloc (len);
 535         printf ("allocated %d bytes ...\n", len);
 536         if (buf == 0) {
 537                 printf ("flashDiag: Out of memory\n");
 538                 goto done;
 539         }
 540
 541         /*
 542          * Write unique counting pattern to each sector
 543          */
 544
 545         for (sector = 0; sector < dev->sectors; sector++) {
 546                 printf ("flashDiag: Write sector %d\n", sector);
 547
 548                 for (i = 0; i < len / 4; i++)
 549                         buf[i] = sector << 24 | i;
 550
 551                 if (flashWrite (dev,
 552                                 sector << dev->lgSectorSize,
 553                                 (char *) buf, len) == ERROR) {
 554                         printf ("flashDiag: Write failed (dev: %d, sector: %d)\n",
 555                                 DEV_NO (dev), sector);
 556                         goto done;
 557                 }
 558         }
 559
 560         /*
 561          * Verify
 562          */
 563
 564         for (sector = 0; sector < dev->sectors; sector++) {
 565                 printf ("flashDiag: Verify sector %d\n", sector);
 566
 567                 if (flashRead (dev,
 568                                    sector << dev->lgSectorSize,
 569                                    (char *) buf, len) == ERROR) {
 570                         printf ("flashDiag: Read failed (dev: %d, sector: %d)\n",
 571                                 DEV_NO (dev), sector);
 572                         goto done;
 573                 }
 574
 575                 for (i = 0; i < len / 4; i++) {
 576                         if (buf[i] != (sector << 24 | i)) {
 577                                 printf ("flashDiag: Verify error "
 578                                         "(dev: %d, sector: %d, offset: 0x%x)\n",
 579                                         DEV_NO (dev), sector, i);
 580                                 printf ("flashDiag: Expected 0x%08x, got 0x%08x\n",
 581                                         sector << 24 | i, buf[i]);
 582
 583                                 goto done;
 584                         }
 585                 }
 586         }
 587
 588         printf ("flashDiag: Erasing\n");
 589
 590         if (flashErase (dev) == ERROR) {
 591                 printf ("flashDiag: Final erase failed\n");
 592                 goto done;
 593         }
 594
 595         rv = OK;
 596
 597   done:
 598         if (buf)
 599                 free (buf);
 600
 601         if (rv == OK)
 602                 printf ("flashDiag: Device %d passed\n", DEV_NO (dev));
 603         else
 604                 printf ("flashDiag: Device %d failed\n", DEV_NO (dev));
 605
 606         return rv;
 607 }
 608
 609 STATUS flashDiagAll (void)
 610 {
 611         int i;
 612         int rv = OK;
 613
 614         PRINTF ("flashDiagAll: devices=%d\n", flashDevCount);
 615
 616         for (i = 0; i < flashDevCount; i++) {
 617                 flash_dev_t *dev = &flashDev[i];
 618
 619                 if (dev->found && flashDiag (dev) == ERROR)
 620                         rv = ERROR;
 621         }
 622
 623         if (rv == OK)
 624                 printf ("flashDiagAll: Passed\n");
 625         else
 626                 printf ("flashDiagAll: Failed because of earlier errors\n");
 627
 628         return OK;
 629 }
 630
 631
 632 /*-----------------------------------------------------------------------
 633  */
 634 unsigned long flash_init (void)
 635 {
 636         unsigned long size = 0;
 637         flash_dev_t *dev = NULL;
 638
 639         flashLibInit ();
 640
 641         /*
 642          * Provide info for FLASH (up to 960K) of Kernel Image data.
 643          */
 644         dev = FLASH_DEV_BANK0_LOW;
 645         flash_info[FLASH_BANK_KERNEL].flash_id =
 646                         (dev->vendorID << 16) | dev->deviceID;
 647         flash_info[FLASH_BANK_KERNEL].sector_count = dev->sectors;
 648         flash_info[FLASH_BANK_KERNEL].size =
 649                         flash_info[FLASH_BANK_KERNEL].sector_count * FLASH_SECTOR_SIZE;
 650         flash_info[FLASH_BANK_KERNEL].start[FIRST_SECTOR] = dev->base;
 651         size += flash_info[FLASH_BANK_KERNEL].size;
 652
 653         /*
 654          * Provide info for 512K PLCC FLASH ROM (U-Boot)
 655          */
 656         dev = FLASH_DEV_BANK0_BOOT;
 657         flash_info[FLASH_BANK_BOOT].flash_id =
 658                         (dev->vendorID << 16) | dev->deviceID;
 659         flash_info[FLASH_BANK_BOOT].sector_count = dev->sectors;
 660         flash_info[FLASH_BANK_BOOT].size =
 661                         flash_info[FLASH_BANK_BOOT].sector_count * FLASH_SECTOR_SIZE;
 662         flash_info[FLASH_BANK_BOOT].start[FIRST_SECTOR] = dev->base;
 663         size += flash_info[FLASH_BANK_BOOT].size;
 664
 665
 666         /*
 667          * Provide info for 512K FLASH0 segment (U-Boot)
 668          */
 669         dev = FLASH_DEV_BANK0_HIGH;
 670         flash_info[FLASH_BANK_AUX].flash_id =
 671                         (dev->vendorID << 16) | dev->deviceID;
 672         flash_info[FLASH_BANK_AUX].sector_count = dev->sectors;
 673         flash_info[FLASH_BANK_AUX].size =
 674                         flash_info[FLASH_BANK_AUX].sector_count * FLASH_SECTOR_SIZE;
 675         flash_info[FLASH_BANK_AUX].start[FIRST_SECTOR] = dev->base;
 676         size += flash_info[FLASH_BANK_AUX].size;
 677
 678
 679         return size;
 680 }
 681
 682 /*
 683  * Get flash device from U-Boot flash info.
 684  */
 685 flash_dev_t *getFlashDevFromInfo (flash_info_t * info)
 686 {
 687         int i;
 688
 689         if (!info)
 690                 return NULL;
 691
 692         for (i = 0; i < flashDevCount; i++) {
 693                 flash_dev_t *dev = &flashDev[i];
 694
 695                 if (dev->found && (dev->base == info->start[0]))
 696                         return dev;
 697         }
 698         printf ("ERROR: notice, no FLASH mapped at address 0x%x\n",
 699                         (unsigned int) info->start[0]);
 700         return NULL;
 701 }
 702
 703 ulong flash_get_size (vu_long * addr, flash_info_t * info)
 704 {
 705         int i;
 706
 707         for (i = 0; i < flashDevCount; i++) {
 708                 flash_dev_t *dev = &flashDev[i];
 709
 710                 if (dev->found) {
 711                         if (dev->base == (unsigned int) addr) {
 712                                 info->flash_id = (dev->vendorID << 16) | dev->deviceID;
 713                                 info->sector_count = dev->sectors;
 714                                 info->size = info->sector_count * FLASH_SECTOR_SIZE;
 715                                 return dev->sectors * FLASH_SECTOR_SIZE;
 716                         }
 717                 }
 718         }
 719         return 0;
 720 }
 721
 722 void flash_print_info (flash_info_t * info)
 723 {
 724         int i;
 725         unsigned int chip;
 726
 727         if (info->flash_id == FLASH_UNKNOWN) {
 728                 printf ("missing or unknown FLASH type\n");
 729                 return;
 730         }
 731
 732         switch ((info->flash_id >> 16) & 0xff) {
 733         case 0x1:
 734                 printf ("AMD ");
 735                 break;
 736         default:
 737                 printf ("Unknown Vendor ");
 738                 break;
 739         }
 740         chip = (unsigned int) info->flash_id & 0x000000ff;
 741
 742         switch (chip) {
 743
 744         case AMD_ID_F040B:
 745                 printf ("AM29F040B (4 Mbit)\n");
 746                 break;
 747
 748         case AMD_ID_LV160B:
 749         case FLASH_AM160LV:
 750         case 0x49:
 751                 printf ("AM29LV160B (16 Mbit / 2M x 8bit)\n");
 752                 break;
 753
 754         default:
 755                 printf ("Unknown Chip Type:0x%x\n", chip);
 756                 break;
 757         }
 758
 759         printf ("  Size: %ld bytes in %d Sectors\n",
 760                 info->size, info->sector_count);
 761
 762         printf ("  Sector Start Addresses:");
 763         for (i = 0; i < info->sector_count; ++i) {
 764                 if ((i % 5) == 0)
 765                         printf ("\n   ");
 766                 printf (" %08lX%s",
 767                         info->start[FIRST_SECTOR] + i * FLASH_SECTOR_SIZE,
 768                         info->protect[i] ? " (RO)" : "     ");
 769         }
 770         printf ("\n");
 771 }
 772
 773
 774 /*
 775  * Erase a range of flash sectors.
 776  */
 777 int flash_erase (flash_info_t * info, int s_first, int s_last)
 778 {
 779         vu_long *addr = (vu_long *) (info->start[0]);
 780         int prot, sect, l_sect;
 781         flash_dev_t *dev = NULL;
 782
 783         if ((s_first < 0) || (s_first > s_last)) {
 784                 if (info->flash_id == FLASH_UNKNOWN) {
 785                         printf ("- missing\n");
 786                 } else {
 787                         printf ("- no sectors to erase\n");
 788                 }
 789                 return 1;
 790         }
 791
 792         prot = 0;
 793         for (sect = s_first; sect <= s_last; sect++) {
 794                 if (info->protect[sect]) {
 795                         prot++;
 796                 }
 797         }
 798
 799         if (prot) {
 800                 printf ("- Warning: %d protected sectors will not be erased!\n",
 801                         prot);
 802         } else {
 803                 printf ("\n");
 804         }
 805
 806         l_sect = -1;
 807
 808         /* Start erase on unprotected sectors */
 809         dev = getFlashDevFromInfo (info);
 810         if (dev) {
 811                 printf ("Erase FLASH[%s] -%d sectors:", dev->name, dev->sectors);
 812                 for (sect = s_first; sect <= s_last; sect++) {
 813                         if (info->protect[sect] == 0) { /* not protected */
 814                                 addr = (vu_long *) (dev->base);
 815                                 /*   printf("erase_sector: sector=%d, addr=0x%x\n",
 816                                    sect, addr); */
 817                                 printf (".");
 818                                 if (ERROR == flashEraseSector (dev, sect)) {
 819                                         printf ("ERROR: could not erase sector %d on FLASH[%s]\n", sect, dev->name);
 820                                         return 1;
 821                                 }
 822                         }
 823                 }
 824         }
 825         printf (" done\n");
 826         return 0;
 827 }
 828
 829 /*-----------------------------------------------------------------------
 830  * Write a word to Flash, returns:
 831  * 0 - OK
 832  * 1 - write timeout
 833  * 2 - Flash not erased
 834  */
 835 static int write_word (flash_info_t * info, ulong dest, ulong data)
 836 {
 837
 838         flash_dev_t *dev = getFlashDevFromInfo (info);
 839         int addr = dest - info->start[0];
 840
 841         if (!dev)
 842                 return 1;
 843
 844         if (OK != flashWrite (dev, addr, (char *) &data, sizeof (ulong))) {
 845                 printf ("ERROR: could not write to addr=0x%x, data=0x%x\n",
 846                         (unsigned int) addr, (unsigned) data);
 847                 return 1;
 848         }
 849
 850         if ((addr % FLASH_SECTOR_SIZE) == 0)
 851                 printf (".");
 852
 853
 854         PRINTF ("write_word:0x%x, base=0x%x, addr=0x%x, data=0x%x\n",
 855                 (unsigned) info->start[0],
 856                 (unsigned) dest,
 857                 (unsigned) (dest - info->start[0]), (unsigned) data);
 858
 859         return (0);
 860 }
 861
 862
 863 /*-----------------------------------------------------------------------
 864  * Copy memory to flash, returns:
 865  * 0 - OK
 866  * 1 - write timeout
 867  * 2 - Flash not erased
 868  */
 869
 870 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 871 {
 872         ulong cp, wp, data;
 873         int i, l, rc;
 874         flash_dev_t *dev = getFlashDevFromInfo (info);
 875
 876         if (dev) {
 877                 printf ("FLASH[%s]:", dev->name);
 878                 wp = (addr & ~3);       /* get lower word aligned address */
 879
 880                 /*
 881                  * handle unaligned start bytes
 882                  */
 883                 if ((l = addr - wp) != 0) {
 884                         data = 0;
 885                         for (i = 0, cp = wp; i < l; ++i, ++cp) {
 886                                 data = (data << 8) | (*(uchar *) cp);
 887                         }
 888                         for (; i < 4 && cnt > 0; ++i) {
 889                                 data = (data << 8) | *src++;
 890                                 --cnt;
 891                                 ++cp;
 892                         }
 893                         for (; cnt == 0 && i < 4; ++i, ++cp) {
 894                                 data = (data << 8) | (*(uchar *) cp);
 895                         }
 896                         if ((rc = write_word (info, wp, data)) != 0) {
 897                                 return (rc);
 898                         }
 899                         wp += 4;
 900                 }
 901
 902                 /*
 903                  * handle word aligned part
 904                  */
 905                 while (cnt >= 4) {
 906                         data = 0;
 907                         for (i = 0; i < 4; ++i) {
 908                                 data = (data << 8) | *src++;
 909                         }
 910                         if ((rc = write_word (info, wp, data)) != 0) {
 911                                 return (rc);
 912                         }
 913                         wp += 4;
 914                         cnt -= 4;
 915                 }
 916
 917                 if (cnt == 0) {
 918                         return (0);
 919                 }
 920
 921                 /*
 922                  * handle unaligned tail bytes
 923                  */
 924                 data = 0;
 925                 for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 926                         data = (data << 8) | *src++;
 927                         --cnt;
 928                 }
 929                 for (; i < 4; ++i, ++cp) {
 930                         data = (data << 8) | (*(uchar *) cp);
 931                 }
 932
 933                 return (write_word (info, wp, data));
 934         }
 935         return 1;
 936 }
 937
 938 /*-----------------------------------------------------------------------
 939  */