drivers/cfi_flash.c

   1 /*
   2  * (C) Copyright 2002-2004
   3  * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
   4  *
   5  * Copyright (C) 2003 Arabella Software Ltd.
   6  * Yuli Barcohen <yuli@arabellasw.com>
   7  * Modified to work with AMD flashes
   8  *
   9  * Copyright (C) 2004
  10  * Ed Okerson
  11  * Modified to work with little-endian systems.
  12  *
  13  * See file CREDITS for list of people who contributed to this
  14  * project.
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License as
  18  * published by the Free Software Foundation; either version 2 of
  19  * the License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  29  * MA 02111-1307 USA
  30  *
  31  * History
  32  * 01/20/2004 - combined variants of original driver.
  33  * 01/22/2004 - Write performance enhancements for parallel chips (Tolunay)
  34  * 01/23/2004 - Support for x8/x16 chips (Rune Raknerud)
  35  * 01/27/2004 - Little endian support Ed Okerson
  36  *
  37  * Tested Architectures
  38  * Port Width  Chip Width    # of banks    Flash Chip  Board
  39  * 32          16            1             28F128J3    seranoa/eagle
  40  * 64          16            1             28F128J3    seranoa/falcon
  41  *
  42  */
  43
  44 /* The DEBUG define must be before common to enable debugging */
  45 /* #define DEBUG        */
  46
  47 #include <common.h>
  48 #include <asm/processor.h>
  49 #include <linux/byteorder/swab.h>
  50 #ifdef  CFG_FLASH_CFI_DRIVER
  51
  52 /*
  53  * This file implements a Common Flash Interface (CFI) driver for U-Boot.
  54  * The width of the port and the width of the chips are determined at initialization.
  55  * These widths are used to calculate the address for access CFI data structures.
  56  * It has been tested on an Intel Strataflash implementation and AMD 29F016D.
  57  *
  58  * References
  59  * JEDEC Standard JESD68 - Common Flash Interface (CFI)
  60  * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
  61  * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
  62  * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
  63  *
  64  * TODO
  65  *
  66  * Use Primary Extended Query table (PRI) and Alternate Algorithm Query
  67  * Table (ALT) to determine if protection is available
  68  *
  69  * Add support for other command sets Use the PRI and ALT to determine command set
  70  * Verify erase and program timeouts.
  71  */
  72
  73 #ifndef CFG_FLASH_BANKS_LIST
  74 #define CFG_FLASH_BANKS_LIST { CFG_FLASH_BASE }
  75 #endif
  76
  77 #define FLASH_CMD_CFI                   0x98
  78 #define FLASH_CMD_READ_ID               0x90
  79 #define FLASH_CMD_RESET                 0xff
  80 #define FLASH_CMD_BLOCK_ERASE           0x20
  81 #define FLASH_CMD_ERASE_CONFIRM         0xD0
  82 #define FLASH_CMD_WRITE                 0x40
  83 #define FLASH_CMD_PROTECT               0x60
  84 #define FLASH_CMD_PROTECT_SET           0x01
  85 #define FLASH_CMD_PROTECT_CLEAR         0xD0
  86 #define FLASH_CMD_CLEAR_STATUS          0x50
  87 #define FLASH_CMD_WRITE_TO_BUFFER       0xE8
  88 #define FLASH_CMD_WRITE_BUFFER_CONFIRM  0xD0
  89
  90 #define FLASH_STATUS_DONE               0x80
  91 #define FLASH_STATUS_ESS                0x40
  92 #define FLASH_STATUS_ECLBS              0x20
  93 #define FLASH_STATUS_PSLBS              0x10
  94 #define FLASH_STATUS_VPENS              0x08
  95 #define FLASH_STATUS_PSS                0x04
  96 #define FLASH_STATUS_DPS                0x02
  97 #define FLASH_STATUS_R                  0x01
  98 #define FLASH_STATUS_PROTECT            0x01
  99
 100 #define AMD_CMD_RESET                   0xF0
 101 #define AMD_CMD_WRITE                   0xA0
 102 #define AMD_CMD_ERASE_START             0x80
 103 #define AMD_CMD_ERASE_SECTOR            0x30
 104
 105 #define AMD_STATUS_TOGGLE               0x40
 106 #define AMD_STATUS_ERROR                0x20
 107
 108 #define FLASH_OFFSET_CFI                0x55
 109 #define FLASH_OFFSET_CFI_RESP           0x10
 110 #define FLASH_OFFSET_PRIMARY_VENDOR     0x13
 111 #define FLASH_OFFSET_WTOUT              0x1F
 112 #define FLASH_OFFSET_WBTOUT             0x20
 113 #define FLASH_OFFSET_ETOUT              0x21
 114 #define FLASH_OFFSET_CETOUT             0x22
 115 #define FLASH_OFFSET_WMAX_TOUT          0x23
 116 #define FLASH_OFFSET_WBMAX_TOUT         0x24
 117 #define FLASH_OFFSET_EMAX_TOUT          0x25
 118 #define FLASH_OFFSET_CEMAX_TOUT         0x26
 119 #define FLASH_OFFSET_SIZE               0x27
 120 #define FLASH_OFFSET_INTERFACE          0x28
 121 #define FLASH_OFFSET_BUFFER_SIZE        0x2A
 122 #define FLASH_OFFSET_NUM_ERASE_REGIONS  0x2C
 123 #define FLASH_OFFSET_ERASE_REGIONS      0x2D
 124 #define FLASH_OFFSET_PROTECT            0x02
 125 #define FLASH_OFFSET_USER_PROTECTION    0x85
 126 #define FLASH_OFFSET_INTEL_PROTECTION   0x81
 127
 128
 129 #define FLASH_MAN_CFI                   0x01000000
 130
 131 #define CFI_CMDSET_NONE             0
 132 #define CFI_CMDSET_INTEL_EXTENDED   1
 133 #define CFI_CMDSET_AMD_STANDARD     2
 134 #define CFI_CMDSET_INTEL_STANDARD   3
 135 #define CFI_CMDSET_AMD_EXTENDED     4
 136 #define CFI_CMDSET_MITSU_STANDARD   256
 137 #define CFI_CMDSET_MITSU_EXTENDED   257
 138 #define CFI_CMDSET_SST              258
 139
 140
 141 typedef union {
 142         unsigned char c;
 143         unsigned short w;
 144         unsigned long l;
 145         unsigned long long ll;
 146 } cfiword_t;
 147
 148 typedef union {
 149         volatile unsigned char *cp;
 150         volatile unsigned short *wp;
 151         volatile unsigned long *lp;
 152         volatile unsigned long long *llp;
 153 } cfiptr_t;
 154
 155 #define NUM_ERASE_REGIONS 4
 156
 157 static ulong bank_base[CFG_MAX_FLASH_BANKS] = CFG_FLASH_BANKS_LIST;
 158
 159 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips   */
 160
 161 /*-----------------------------------------------------------------------
 162  * Functions
 163  */
 164
 165 typedef unsigned long flash_sect_t;
 166
 167 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c);
 168 static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf);
 169 static void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
 170 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect);
 171 static int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
 172 static int flash_isset (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
 173 static int flash_toggle (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
 174 static int flash_detect_cfi (flash_info_t * info);
 175 static ulong flash_get_size (ulong base, int banknum);
 176 static int flash_write_cfiword (flash_info_t * info, ulong dest, cfiword_t cword);
 177 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 178                                     ulong tout, char *prompt);
 179 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 180 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp, int len);
 181 #endif
 182
 183 /*-----------------------------------------------------------------------
 184  * create an address based on the offset and the port width
 185  */
 186 inline uchar *flash_make_addr (flash_info_t * info, flash_sect_t sect, uint offset)
 187 {
 188         return ((uchar *) (info->start[sect] + (offset * info->portwidth)));
 189 }
 190
 191 #ifdef DEBUG
 192 /*-----------------------------------------------------------------------
 193  * Debug support
 194  */
 195 void print_longlong (char *str, unsigned long long data)
 196 {
 197         int i;
 198         char *cp;
 199
 200         cp = (unsigned char *) &data;
 201         for (i = 0; i < 8; i++)
 202                 sprintf (&str[i * 2], "%2.2x", *cp++);
 203 }
 204 static void flash_printqry (flash_info_t * info, flash_sect_t sect)
 205 {
 206         cfiptr_t cptr;
 207         int x, y;
 208
 209         for (x = 0; x < 0x40; x += 16 / info->portwidth) {
 210                 cptr.cp =
 211                         flash_make_addr (info, sect,
 212                                          x + FLASH_OFFSET_CFI_RESP);
 213                 debug ("%p : ", cptr.cp);
 214                 for (y = 0; y < 16; y++) {
 215                         debug ("%2.2x ", cptr.cp[y]);
 216                 }
 217                 debug (" ");
 218                 for (y = 0; y < 16; y++) {
 219                         if (cptr.cp[y] >= 0x20 && cptr.cp[y] <= 0x7e) {
 220                                 debug ("%c", cptr.cp[y]);
 221                         } else {
 222                                 debug (".");
 223                         }
 224                 }
 225                 debug ("\n");
 226         }
 227 }
 228 #endif
 229
 230
 231 /*-----------------------------------------------------------------------
 232  * read a character at a port width address
 233  */
 234 inline uchar flash_read_uchar (flash_info_t * info, uint offset)
 235 {
 236         uchar *cp;
 237
 238         cp = flash_make_addr (info, 0, offset);
 239 #if defined(__LITTLE_ENDIAN)
 240         return (cp[0]);
 241 #else
 242         return (cp[info->portwidth - 1]);
 243 #endif
 244 }
 245
 246 /*-----------------------------------------------------------------------
 247  * read a short word by swapping for ppc format.
 248  */
 249 ushort flash_read_ushort (flash_info_t * info, flash_sect_t sect, uint offset)
 250 {
 251         uchar *addr;
 252         ushort retval;
 253
 254 #ifdef DEBUG
 255         int x;
 256 #endif
 257         addr = flash_make_addr (info, sect, offset);
 258
 259 #ifdef DEBUG
 260         debug ("ushort addr is at %p info->portwidth = %d\n", addr,
 261                info->portwidth);
 262         for (x = 0; x < 2 * info->portwidth; x++) {
 263                 debug ("addr[%x] = 0x%x\n", x, addr[x]);
 264         }
 265 #endif
 266 #if defined(__LITTLE_ENDIAN)
 267         retval = ((addr[(info->portwidth)] << 8) | addr[0]);
 268 #else
 269         retval = ((addr[(2 * info->portwidth) - 1] << 8) |
 270                   addr[info->portwidth - 1]);
 271 #endif
 272
 273         debug ("retval = 0x%x\n", retval);
 274         return retval;
 275 }
 276
 277 /*-----------------------------------------------------------------------
 278  * read a long word by picking the least significant byte of each maiximum
 279  * port size word. Swap for ppc format.
 280  */
 281 ulong flash_read_long (flash_info_t * info, flash_sect_t sect, uint offset)
 282 {
 283         uchar *addr;
 284         ulong retval;
 285
 286 #ifdef DEBUG
 287         int x;
 288 #endif
 289         addr = flash_make_addr (info, sect, offset);
 290
 291 #ifdef DEBUG
 292         debug ("long addr is at %p info->portwidth = %d\n", addr,
 293                info->portwidth);
 294         for (x = 0; x < 4 * info->portwidth; x++) {
 295                 debug ("addr[%x] = 0x%x\n", x, addr[x]);
 296         }
 297 #endif
 298 #if defined(__LITTLE_ENDIAN)
 299         retval = (addr[0] << 16) | (addr[(info->portwidth)] << 24) |
 300                 (addr[(2 * info->portwidth)]) | (addr[(3 * info->portwidth)] << 8);
 301 #else
 302         retval = (addr[(2 * info->portwidth) - 1] << 24) |
 303                 (addr[(info->portwidth) - 1] << 16) |
 304                 (addr[(4 * info->portwidth) - 1] << 8) |
 305                 addr[(3 * info->portwidth) - 1];
 306 #endif
 307         return retval;
 308 }
 309
 310 /*-----------------------------------------------------------------------
 311  */
 312 unsigned long flash_init (void)
 313 {
 314         unsigned long size = 0;
 315         int i;
 316
 317         /* Init: no FLASHes known */
 318         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
 319                 flash_info[i].flash_id = FLASH_UNKNOWN;
 320                 size += flash_info[i].size = flash_get_size (bank_base[i], i);
 321                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 322                         printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 323                                 i, flash_info[i].size, flash_info[i].size << 20);
 324                 }
 325         }
 326
 327         /* Monitor protection ON by default */
 328 #if (CFG_MONITOR_BASE >= CFG_FLASH_BASE)
 329         flash_protect (FLAG_PROTECT_SET,
 330                        CFG_MONITOR_BASE,
 331                        CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
 332                        &flash_info[0]);
 333 #endif
 334
 335         return (size);
 336 }
 337
 338 /*-----------------------------------------------------------------------
 339  */
 340 int flash_erase (flash_info_t * info, int s_first, int s_last)
 341 {
 342         int rcode = 0;
 343         int prot;
 344         flash_sect_t sect;
 345
 346         if (info->flash_id != FLASH_MAN_CFI) {
 347                 printf ("Can't erase unknown flash type - aborted\n");
 348                 return 1;
 349         }
 350         if ((s_first < 0) || (s_first > s_last)) {
 351                 printf ("- no sectors to erase\n");
 352                 return 1;
 353         }
 354
 355         prot = 0;
 356         for (sect = s_first; sect <= s_last; ++sect) {
 357                 if (info->protect[sect]) {
 358                         prot++;
 359                 }
 360         }
 361         if (prot) {
 362                 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 363         } else {
 364                 printf ("\n");
 365         }
 366
 367
 368         for (sect = s_first; sect <= s_last; sect++) {
 369                 if (info->protect[sect] == 0) { /* not protected */
 370                         switch (info->vendor) {
 371                         case CFI_CMDSET_INTEL_STANDARD:
 372                         case CFI_CMDSET_INTEL_EXTENDED:
 373                                 flash_write_cmd (info, sect, 0, FLASH_CMD_CLEAR_STATUS);
 374                                 flash_write_cmd (info, sect, 0, FLASH_CMD_BLOCK_ERASE);
 375                                 flash_write_cmd (info, sect, 0, FLASH_CMD_ERASE_CONFIRM);
 376                                 break;
 377                         case CFI_CMDSET_AMD_STANDARD:
 378                         case CFI_CMDSET_AMD_EXTENDED:
 379                                 flash_unlock_seq (info, sect);
 380                                 flash_write_cmd (info, sect, 0x555, AMD_CMD_ERASE_START);
 381                                 flash_unlock_seq (info, sect);
 382                                 flash_write_cmd (info, sect, 0, AMD_CMD_ERASE_SECTOR);
 383                                 break;
 384                         default:
 385                                 debug ("Unkown flash vendor %d\n",
 386                                        info->vendor);
 387                                 break;
 388                         }
 389
 390                         if (flash_full_status_check
 391                             (info, sect, info->erase_blk_tout, "erase")) {
 392                                 rcode = 1;
 393                         } else
 394                                 printf (".");
 395                 }
 396         }
 397         printf (" done\n");
 398         return rcode;
 399 }
 400
 401 /*-----------------------------------------------------------------------
 402  */
 403 void flash_print_info (flash_info_t * info)
 404 {
 405         int i;
 406
 407         if (info->flash_id != FLASH_MAN_CFI) {
 408                 printf ("missing or unknown FLASH type\n");
 409                 return;
 410         }
 411
 412         printf ("CFI conformant FLASH (%d x %d)",
 413                 (info->portwidth << 3), (info->chipwidth << 3));
 414         printf ("  Size: %ld MB in %d Sectors\n",
 415                 info->size >> 20, info->sector_count);
 416         printf (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n",
 417                 info->erase_blk_tout,
 418                 info->write_tout,
 419                 info->buffer_write_tout,
 420                 info->buffer_size);
 421
 422         printf ("  Sector Start Addresses:");
 423         for (i = 0; i < info->sector_count; ++i) {
 424 #ifdef CFG_FLASH_EMPTY_INFO
 425                 int k;
 426                 int size;
 427                 int erased;
 428                 volatile unsigned long *flash;
 429
 430                 /*
 431                  * Check if whole sector is erased
 432                  */
 433                 if (i != (info->sector_count - 1))
 434                         size = info->start[i + 1] - info->start[i];
 435                 else
 436                         size = info->start[0] + info->size - info->start[i];
 437                 erased = 1;
 438                 flash = (volatile unsigned long *) info->start[i];
 439                 size = size >> 2;       /* divide by 4 for longword access */
 440                 for (k = 0; k < size; k++) {
 441                         if (*flash++ != 0xffffffff) {
 442                                 erased = 0;
 443                                 break;
 444                         }
 445                 }
 446
 447                 if ((i % 5) == 0)
 448                         printf ("\n");
 449                 /* print empty and read-only info */
 450                 printf (" %08lX%s%s",
 451                         info->start[i],
 452                         erased ? " E" : "  ",
 453                         info->protect[i] ? "RO " : "   ");
 454 #else
 455                 if ((i % 5) == 0)
 456                         printf ("\n   ");
 457                 printf (" %08lX%s",
 458                         info->start[i], info->protect[i] ? " (RO)" : "     ");
 459 #endif
 460         }
 461         printf ("\n");
 462         return;
 463 }
 464
 465 /*-----------------------------------------------------------------------
 466  * Copy memory to flash, returns:
 467  * 0 - OK
 468  * 1 - write timeout
 469  * 2 - Flash not erased
 470  */
 471 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 472 {
 473         ulong wp;
 474         ulong cp;
 475         int aln;
 476         cfiword_t cword;
 477         int i, rc;
 478
 479 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 480         int buffered_size;
 481 #endif
 482         int x8mode = 0;
 483
 484         /* special handling of 16 bit devices in 8 bit mode */
 485         if ((info->interface == FLASH_CFI_X8X16)
 486             && (info->chipwidth == FLASH_CFI_BY8)) {
 487                 switch (info->vendor) {
 488                 case CFI_CMDSET_INTEL_STANDARD:
 489                 case CFI_CMDSET_INTEL_EXTENDED:
 490                         x8mode = info->portwidth;
 491                         info->portwidth >>= 1;  /* XXX - Need to test on x9/x16 in parallel. */
 492                         /*info->portwidth = FLASH_CFI_8BIT; */ /* XXX - Need to test on x9/x16 in parallel. */
 493                         break;
 494                 case CFI_CMDSET_AMD_STANDARD:
 495                 case CFI_CMDSET_AMD_EXTENDED:
 496                 default:
 497                         break;
 498                 }
 499         }
 500         /* get lower aligned address */
 501         /* get lower aligned address */
 502         wp = (addr & ~(info->portwidth - 1));
 503
 504         /* handle unaligned start */
 505         if ((aln = addr - wp) != 0) {
 506                 cword.l = 0;
 507                 cp = wp;
 508                 for (i = 0; i < aln; ++i, ++cp)
 509                         flash_add_byte (info, &cword, (*(uchar *) cp));
 510
 511                 for (; (i < info->portwidth) && (cnt > 0); i++) {
 512                         flash_add_byte (info, &cword, *src++);
 513                         cnt--;
 514                         cp++;
 515                 }
 516                 for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
 517                         flash_add_byte (info, &cword, (*(uchar *) cp));
 518                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
 519                         return rc;
 520                 wp = cp;
 521         }
 522
 523         /* handle the aligned part */
 524 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 525         buffered_size = (info->portwidth / info->chipwidth);
 526         buffered_size *= info->buffer_size;
 527         while (cnt >= info->portwidth) {
 528                 i = buffered_size > cnt ? cnt : buffered_size;
 529                 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
 530                         return rc;
 531                 wp += i;
 532                 src += i;
 533                 cnt -= i;
 534         }
 535 #else
 536         while (cnt >= info->portwidth) {
 537                 cword.l = 0;
 538                 for (i = 0; i < info->portwidth; i++) {
 539                         flash_add_byte (info, &cword, *src++);
 540                 }
 541                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
 542                         return rc;
 543                 wp += info->portwidth;
 544                 cnt -= info->portwidth;
 545         }
 546 #endif /* CFG_FLASH_USE_BUFFER_WRITE */
 547         if (cnt == 0) {
 548                 return (0);
 549         }
 550
 551         /*
 552          * handle unaligned tail bytes
 553          */
 554         cword.l = 0;
 555         for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) {
 556                 flash_add_byte (info, &cword, *src++);
 557                 --cnt;
 558         }
 559         for (; i < info->portwidth; ++i, ++cp) {
 560                 flash_add_byte (info, &cword, (*(uchar *) cp));
 561         }
 562
 563         /* special handling of 16 bit devices in 8 bit mode */
 564         if (x8mode) {
 565                 info->portwidth = x8mode;;
 566         }
 567         return flash_write_cfiword (info, wp, cword);
 568 }
 569
 570 /*-----------------------------------------------------------------------
 571  */
 572 #ifdef CFG_FLASH_PROTECTION
 573
 574 int flash_real_protect (flash_info_t * info, long sector, int prot)
 575 {
 576         int retcode = 0;
 577
 578         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 579         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
 580         if (prot)
 581                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
 582         else
 583                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
 584
 585         if ((retcode =
 586              flash_full_status_check (info, sector, info->erase_blk_tout,
 587                                       prot ? "protect" : "unprotect")) == 0) {
 588
 589                 info->protect[sector] = prot;
 590                 /* Intel's unprotect unprotects all locking */
 591                 if (prot == 0) {
 592                         flash_sect_t i;
 593
 594                         for (i = 0; i < info->sector_count; i++) {
 595                                 if (info->protect[i])
 596                                         flash_real_protect (info, i, 1);
 597                         }
 598                 }
 599         }
 600         return retcode;
 601 }
 602
 603 /*-----------------------------------------------------------------------
 604  * flash_read_user_serial - read the OneTimeProgramming cells
 605  */
 606 void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
 607                              int len)
 608 {
 609         uchar *src;
 610         uchar *dst;
 611
 612         dst = buffer;
 613         src = flash_make_addr (info, 0, FLASH_OFFSET_USER_PROTECTION);
 614         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
 615         memcpy (dst, src + offset, len);
 616         flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
 617 }
 618
 619 /*
 620  * flash_read_factory_serial - read the device Id from the protection area
 621  */
 622 void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
 623                                 int len)
 624 {
 625         uchar *src;
 626
 627         src = flash_make_addr (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
 628         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
 629         memcpy (buffer, src + offset, len);
 630         flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
 631 }
 632
 633 #endif /* CFG_FLASH_PROTECTION */
 634
 635 /*
 636  * flash_is_busy - check to see if the flash is busy
 637  * This routine checks the status of the chip and returns true if the chip is busy
 638  */
 639 static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
 640 {
 641         int retval;
 642
 643         switch (info->vendor) {
 644         case CFI_CMDSET_INTEL_STANDARD:
 645         case CFI_CMDSET_INTEL_EXTENDED:
 646                 retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
 647                 break;
 648         case CFI_CMDSET_AMD_STANDARD:
 649         case CFI_CMDSET_AMD_EXTENDED:
 650                 retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
 651                 break;
 652         default:
 653                 retval = 0;
 654         }
 655         debug ("flash_is_busy: %d\n", retval);
 656         return retval;
 657 }
 658
 659 /*-----------------------------------------------------------------------
 660  *  wait for XSR.7 to be set. Time out with an error if it does not.
 661  *  This routine does not set the flash to read-array mode.
 662  */
 663 static int flash_status_check (flash_info_t * info, flash_sect_t sector,
 664                                ulong tout, char *prompt)
 665 {
 666         ulong start;
 667
 668         /* Wait for command completion */
 669         start = get_timer (0);
 670         while (flash_is_busy (info, sector)) {
 671                 if (get_timer (start) > info->erase_blk_tout * CFG_HZ) {
 672                         printf ("Flash %s timeout at address %lx data %lx\n",
 673                                 prompt, info->start[sector],
 674                                 flash_read_long (info, sector, 0));
 675                         flash_write_cmd (info, sector, 0, info->cmd_reset);
 676                         return ERR_TIMOUT;
 677                 }
 678         }
 679         return ERR_OK;
 680 }
 681
 682 /*-----------------------------------------------------------------------
 683  * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check.
 684  * This routine sets the flash to read-array mode.
 685  */
 686 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 687                                     ulong tout, char *prompt)
 688 {
 689         int retcode;
 690
 691         retcode = flash_status_check (info, sector, tout, prompt);
 692         switch (info->vendor) {
 693         case CFI_CMDSET_INTEL_EXTENDED:
 694         case CFI_CMDSET_INTEL_STANDARD:
 695                 if ((retcode != ERR_OK)
 696                     && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 697                         retcode = ERR_INVAL;
 698                         printf ("Flash %s error at address %lx\n", prompt,
 699                                 info->start[sector]);
 700                         if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) {
 701                                 printf ("Command Sequence Error.\n");
 702                         } else if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS)) {
 703                                 printf ("Block Erase Error.\n");
 704                                 retcode = ERR_NOT_ERASED;
 705                         } else if (flash_isset (info, sector, 0, FLASH_STATUS_PSLBS)) {
 706                                 printf ("Locking Error\n");
 707                         }
 708                         if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
 709                                 printf ("Block locked.\n");
 710                                 retcode = ERR_PROTECTED;
 711                         }
 712                         if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
 713                                 printf ("Vpp Low Error.\n");
 714                 }
 715                 flash_write_cmd (info, sector, 0, FLASH_CMD_RESET);
 716                 break;
 717         default:
 718                 break;
 719         }
 720         return retcode;
 721 }
 722
 723 /*-----------------------------------------------------------------------
 724  */
 725 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 726 {
 727 #if defined(__LITTLE_ENDIAN)
 728         unsigned short  w;
 729         unsigned int    l;
 730         unsigned long long ll;
 731 #endif
 732
 733         switch (info->portwidth) {
 734         case FLASH_CFI_8BIT:
 735                 cword->c = c;
 736                 break;
 737         case FLASH_CFI_16BIT:
 738 #if defined(__LITTLE_ENDIAN)
 739                 w = c;
 740                 w <<= 8;
 741                 cword->w = (cword->w >> 8) | w;
 742 #else
 743                 cword->w = (cword->w << 8) | c;
 744 #endif
 745                 break;
 746         case FLASH_CFI_32BIT:
 747 #if defined(__LITTLE_ENDIAN)
 748                 l = c;
 749                 l <<= 24;
 750                 cword->l = (cword->l >> 8) | l;
 751 #else
 752                 cword->l = (cword->l << 8) | c;
 753 #endif
 754                 break;
 755         case FLASH_CFI_64BIT:
 756 #if defined(__LITTLE_ENDIAN)
 757                 ll = c;
 758                 ll <<= 56;
 759                 cword->ll = (cword->ll >> 8) | ll;
 760 #else
 761                 cword->ll = (cword->ll << 8) | c;
 762 #endif
 763                 break;
 764         }
 765 }
 766
 767
 768 /*-----------------------------------------------------------------------
 769  * make a proper sized command based on the port and chip widths
 770  */
 771 static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
 772 {
 773         int i;
 774
 775 #if defined(__LITTLE_ENDIAN)
 776         ushort stmpw;
 777         uint   stmpi;
 778 #endif
 779         uchar *cp = (uchar *) cmdbuf;
 780
 781         for (i = 0; i < info->portwidth; i++)
 782                 *cp++ = ((i + 1) % info->chipwidth) ? '\0' : cmd;
 783 #if defined(__LITTLE_ENDIAN)
 784         switch (info->portwidth) {
 785         case FLASH_CFI_8BIT:
 786                 break;
 787         case FLASH_CFI_16BIT:
 788                 stmpw = *(ushort *) cmdbuf;
 789                 *(ushort *) cmdbuf = __swab16 (stmpw);
 790                 break;
 791         case FLASH_CFI_32BIT:
 792                 stmpi = *(uint *) cmdbuf;
 793                 *(uint *) cmdbuf = __swab32 (stmpi);
 794                 break;
 795         default:
 796                 printf("WARNING: flash_make_cmd: unsuppported LittleEndian mode\n");
 797                 break;
 798         }
 799 #endif
 800 }
 801
 802 /*
 803  * Write a proper sized command to the correct address
 804  */
 805 static void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
 806 {
 807
 808         volatile cfiptr_t addr;
 809         cfiword_t cword;
 810
 811         addr.cp = flash_make_addr (info, sect, offset);
 812         flash_make_cmd (info, cmd, &cword);
 813         switch (info->portwidth) {
 814         case FLASH_CFI_8BIT:
 815                 debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr.cp, cmd,
 816                        cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 817                 *addr.cp = cword.c;
 818                 break;
 819         case FLASH_CFI_16BIT:
 820                 debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr.wp,
 821                        cmd, cword.w,
 822                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 823                 *addr.wp = cword.w;
 824                 break;
 825         case FLASH_CFI_32BIT:
 826                 debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr.lp,
 827                        cmd, cword.l,
 828                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 829                 *addr.lp = cword.l;
 830                 break;
 831         case FLASH_CFI_64BIT:
 832 #ifdef DEBUG
 833                 {
 834                         char str[20];
 835
 836                         print_longlong (str, cword.ll);
 837
 838                         debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
 839                                addr.llp, cmd, str,
 840                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 841                 }
 842 #endif
 843                 *addr.llp = cword.ll;
 844                 break;
 845         }
 846 }
 847
 848 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
 849 {
 850         flash_write_cmd (info, sect, 0x555, 0xAA);
 851         flash_write_cmd (info, sect, 0x2AA, 0x55);
 852 }
 853
 854 /*-----------------------------------------------------------------------
 855  */
 856 static int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
 857 {
 858         cfiptr_t cptr;
 859         cfiword_t cword;
 860         int retval;
 861
 862         cptr.cp = flash_make_addr (info, sect, offset);
 863         flash_make_cmd (info, cmd, &cword);
 864
 865         debug ("is= cmd %x(%c) addr %p ", cmd, cmd, cptr.cp);
 866         switch (info->portwidth) {
 867         case FLASH_CFI_8BIT:
 868                 debug ("is= %x %x\n", cptr.cp[0], cword.c);
 869                 retval = (cptr.cp[0] == cword.c);
 870                 break;
 871         case FLASH_CFI_16BIT:
 872                 debug ("is= %4.4x %4.4x\n", cptr.wp[0], cword.w);
 873                 retval = (cptr.wp[0] == cword.w);
 874                 break;
 875         case FLASH_CFI_32BIT:
 876                 debug ("is= %8.8lx %8.8lx\n", cptr.lp[0], cword.l);
 877                 retval = (cptr.lp[0] == cword.l);
 878                 break;
 879         case FLASH_CFI_64BIT:
 880 #ifdef DEBUG
 881                 {
 882                         char str1[20];
 883                         char str2[20];
 884
 885                         print_longlong (str1, cptr.llp[0]);
 886                         print_longlong (str2, cword.ll);
 887                         debug ("is= %s %s\n", str1, str2);
 888                 }
 889 #endif
 890                 retval = (cptr.llp[0] == cword.ll);
 891                 break;
 892         default:
 893                 retval = 0;
 894                 break;
 895         }
 896         return retval;
 897 }
 898
 899 /*-----------------------------------------------------------------------
 900  */
 901 static int flash_isset (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
 902 {
 903         cfiptr_t cptr;
 904         cfiword_t cword;
 905         int retval;
 906
 907         cptr.cp = flash_make_addr (info, sect, offset);
 908         flash_make_cmd (info, cmd, &cword);
 909         switch (info->portwidth) {
 910         case FLASH_CFI_8BIT:
 911                 retval = ((cptr.cp[0] & cword.c) == cword.c);
 912                 break;
 913         case FLASH_CFI_16BIT:
 914                 retval = ((cptr.wp[0] & cword.w) == cword.w);
 915                 break;
 916         case FLASH_CFI_32BIT:
 917                 retval = ((cptr.lp[0] & cword.l) == cword.l);
 918                 break;
 919         case FLASH_CFI_64BIT:
 920                 retval = ((cptr.llp[0] & cword.ll) == cword.ll);
 921                 break;
 922         default:
 923                 retval = 0;
 924                 break;
 925         }
 926         return retval;
 927 }
 928
 929 /*-----------------------------------------------------------------------
 930  */
 931 static int flash_toggle (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
 932 {
 933         cfiptr_t cptr;
 934         cfiword_t cword;
 935         int retval;
 936
 937         cptr.cp = flash_make_addr (info, sect, offset);
 938         flash_make_cmd (info, cmd, &cword);
 939         switch (info->portwidth) {
 940         case FLASH_CFI_8BIT:
 941                 retval = ((cptr.cp[0] & cword.c) != (cptr.cp[0] & cword.c));
 942                 break;
 943         case FLASH_CFI_16BIT:
 944                 retval = ((cptr.wp[0] & cword.w) != (cptr.wp[0] & cword.w));
 945                 break;
 946         case FLASH_CFI_32BIT:
 947                 retval = ((cptr.lp[0] & cword.l) != (cptr.lp[0] & cword.l));
 948                 break;
 949         case FLASH_CFI_64BIT:
 950                 retval = ((cptr.llp[0] & cword.ll) !=
 951                           (cptr.llp[0] & cword.ll));
 952                 break;
 953         default:
 954                 retval = 0;
 955                 break;
 956         }
 957         return retval;
 958 }
 959
 960 /*-----------------------------------------------------------------------
 961  * detect if flash is compatible with the Common Flash Interface (CFI)
 962  * http://www.jedec.org/download/search/jesd68.pdf
 963  *
 964 */
 965 static int flash_detect_cfi (flash_info_t * info)
 966 {
 967         debug ("flash detect cfi\n");
 968
 969         for (info->portwidth = FLASH_CFI_8BIT;
 970              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
 971                 for (info->chipwidth = FLASH_CFI_BY8;
 972                      info->chipwidth <= info->portwidth;
 973                      info->chipwidth <<= 1) {
 974                         flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
 975                         flash_write_cmd (info, 0, FLASH_OFFSET_CFI, FLASH_CMD_CFI);
 976                         if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
 977                             && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
 978                             && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
 979                                 info->interface = flash_read_ushort (info, 0, FLASH_OFFSET_INTERFACE);
 980                                 debug ("device interface is %d\n",
 981                                        info->interface);
 982                                 debug ("found port %d chip %d ",
 983                                        info->portwidth, info->chipwidth);
 984                                 debug ("port %d bits chip %d bits\n",
 985                                        info->portwidth << CFI_FLASH_SHIFT_WIDTH,
 986                                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 987                                 return 1;
 988                         }
 989                 }
 990         }
 991         debug ("not found\n");
 992         return 0;
 993 }
 994
 995 /*
 996  * The following code cannot be run from FLASH!
 997  *
 998  */
 999 static ulong flash_get_size (ulong base, int banknum)
1000 {
1001         flash_info_t *info = &flash_info[banknum];
1002         int i, j;
1003         flash_sect_t sect_cnt;
1004         unsigned long sector;
1005         unsigned long tmp;
1006         int size_ratio;
1007         uchar num_erase_regions;
1008         int erase_region_size;
1009         int erase_region_count;
1010
1011         info->start[0] = base;
1012
1013         if (flash_detect_cfi (info)) {
1014                 info->vendor = flash_read_ushort (info, 0, FLASH_OFFSET_PRIMARY_VENDOR);
1015 #ifdef DEBUG
1016                 flash_printqry (info, 0);
1017 #endif
1018                 switch (info->vendor) {
1019                 case CFI_CMDSET_INTEL_STANDARD:
1020                 case CFI_CMDSET_INTEL_EXTENDED:
1021                 default:
1022                         info->cmd_reset = FLASH_CMD_RESET;
1023                         break;
1024                 case CFI_CMDSET_AMD_STANDARD:
1025                 case CFI_CMDSET_AMD_EXTENDED:
1026                         info->cmd_reset = AMD_CMD_RESET;
1027                         break;
1028                 }
1029
1030                 debug ("manufacturer is %d\n", info->vendor);
1031                 size_ratio = info->portwidth / info->chipwidth;
1032                 /* if the chip is x8/x16 reduce the ratio by half */
1033                 if ((info->interface == FLASH_CFI_X8X16)
1034                     && (info->chipwidth == FLASH_CFI_BY8)) {
1035                         size_ratio >>= 1;
1036                 }
1037                 num_erase_regions = flash_read_uchar (info, FLASH_OFFSET_NUM_ERASE_REGIONS);
1038                 debug ("size_ratio %d port %d bits chip %d bits\n",
1039                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1040                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1041                 debug ("found %d erase regions\n", num_erase_regions);
1042                 sect_cnt = 0;
1043                 sector = base;
1044                 for (i = 0; i < num_erase_regions; i++) {
1045                         if (i > NUM_ERASE_REGIONS) {
1046                                 printf ("%d erase regions found, only %d used\n",
1047                                         num_erase_regions, NUM_ERASE_REGIONS);
1048                                 break;
1049                         }
1050                         tmp = flash_read_long (info, 0,
1051                                                FLASH_OFFSET_ERASE_REGIONS +
1052                                                i * 4);
1053                         erase_region_size =
1054                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
1055                         tmp >>= 16;
1056                         erase_region_count = (tmp & 0xffff) + 1;
1057                         printf ("erase_region_count = %d erase_region_size = %d\n",
1058                                 erase_region_count, erase_region_size);
1059                         for (j = 0; j < erase_region_count; j++) {
1060                                 info->start[sect_cnt] = sector;
1061                                 sector += (erase_region_size * size_ratio);
1062                                 info->protect[sect_cnt] =
1063                                         flash_isset (info, sect_cnt,
1064                                                      FLASH_OFFSET_PROTECT,
1065                                                      FLASH_STATUS_PROTECT);
1066                                 sect_cnt++;
1067                         }
1068                 }
1069
1070                 info->sector_count = sect_cnt;
1071                 /* multiply the size by the number of chips */
1072                 info->size = (1 << flash_read_uchar (info, FLASH_OFFSET_SIZE)) * size_ratio;
1073                 info->buffer_size = (1 << flash_read_ushort (info, 0, FLASH_OFFSET_BUFFER_SIZE));
1074                 tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT);
1075                 info->erase_blk_tout = (tmp * (1 << flash_read_uchar (info, FLASH_OFFSET_EMAX_TOUT)));
1076                 tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT);
1077                 info->buffer_write_tout = (tmp * (1 << flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT)));
1078                 tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT);
1079                 info->write_tout = (tmp * (1 << flash_read_uchar (info, FLASH_OFFSET_WMAX_TOUT))) / 1000;
1080                 info->flash_id = FLASH_MAN_CFI;
1081         }
1082
1083         flash_write_cmd (info, 0, 0, FLASH_CMD_RESET);
1084         return (info->size);
1085 }
1086
1087
1088 /*-----------------------------------------------------------------------
1089  */
1090 static int flash_write_cfiword (flash_info_t * info, ulong dest,
1091                                 cfiword_t cword)
1092 {
1093
1094         cfiptr_t ctladdr;
1095         cfiptr_t cptr;
1096         int flag;
1097
1098         ctladdr.cp = flash_make_addr (info, 0, 0);
1099         cptr.cp = (uchar *) dest;
1100
1101
1102         /* Check if Flash is (sufficiently) erased */
1103         switch (info->portwidth) {
1104         case FLASH_CFI_8BIT:
1105                 flag = ((cptr.cp[0] & cword.c) == cword.c);
1106                 break;
1107         case FLASH_CFI_16BIT:
1108                 flag = ((cptr.wp[0] & cword.w) == cword.w);
1109                 break;
1110         case FLASH_CFI_32BIT:
1111                 flag = ((cptr.lp[0] & cword.l) == cword.l);
1112                 break;
1113         case FLASH_CFI_64BIT:
1114                 flag = ((cptr.lp[0] & cword.ll) == cword.ll);
1115                 break;
1116         default:
1117                 return 2;
1118         }
1119         if (!flag)
1120                 return 2;
1121
1122         /* Disable interrupts which might cause a timeout here */
1123         flag = disable_interrupts ();
1124
1125         switch (info->vendor) {
1126         case CFI_CMDSET_INTEL_EXTENDED:
1127         case CFI_CMDSET_INTEL_STANDARD:
1128                 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
1129                 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
1130                 break;
1131         case CFI_CMDSET_AMD_EXTENDED:
1132         case CFI_CMDSET_AMD_STANDARD:
1133                 flash_unlock_seq (info, 0);
1134                 flash_write_cmd (info, 0, 0x555, AMD_CMD_WRITE);
1135                 break;
1136         }
1137
1138         switch (info->portwidth) {
1139         case FLASH_CFI_8BIT:
1140                 cptr.cp[0] = cword.c;
1141                 break;
1142         case FLASH_CFI_16BIT:
1143                 cptr.wp[0] = cword.w;
1144                 break;
1145         case FLASH_CFI_32BIT:
1146                 cptr.lp[0] = cword.l;
1147                 break;
1148         case FLASH_CFI_64BIT:
1149                 cptr.llp[0] = cword.ll;
1150                 break;
1151         }
1152
1153         /* re-enable interrupts if necessary */
1154         if (flag)
1155                 enable_interrupts ();
1156
1157         return flash_full_status_check (info, 0, info->write_tout, "write");
1158 }
1159
1160 #ifdef CFG_FLASH_USE_BUFFER_WRITE
1161
1162 /* loop through the sectors from the highest address
1163  * when the passed address is greater or equal to the sector address
1164  * we have a match
1165  */
1166 static flash_sect_t find_sector (flash_info_t * info, ulong addr)
1167 {
1168         flash_sect_t sector;
1169
1170         for (sector = info->sector_count - 1; sector >= 0; sector--) {
1171                 if (addr >= info->start[sector])
1172                         break;
1173         }
1174         return sector;
1175 }
1176
1177 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
1178                                   int len)
1179 {
1180         flash_sect_t sector;
1181         int cnt;
1182         int retcode;
1183         volatile cfiptr_t src;
1184         volatile cfiptr_t dst;
1185
1186         src.cp = cp;
1187         dst.cp = (uchar *) dest;
1188         sector = find_sector (info, dest);
1189         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1190         flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
1191         if ((retcode =
1192              flash_status_check (info, sector, info->buffer_write_tout,
1193                                  "write to buffer")) == ERR_OK) {
1194                 /* reduce the number of loops by the width of the port  */
1195                 switch (info->portwidth) {
1196                 case FLASH_CFI_8BIT:
1197                         cnt = len;
1198                         break;
1199                 case FLASH_CFI_16BIT:
1200                         cnt = len >> 1;
1201                         break;
1202                 case FLASH_CFI_32BIT:
1203                         cnt = len >> 2;
1204                         break;
1205                 case FLASH_CFI_64BIT:
1206                         cnt = len >> 3;
1207                         break;
1208                 default:
1209                         return ERR_INVAL;
1210                         break;
1211                 }
1212                 flash_write_cmd (info, sector, 0, (uchar) cnt - 1);
1213                 while (cnt-- > 0) {
1214                         switch (info->portwidth) {
1215                         case FLASH_CFI_8BIT:
1216                                 *dst.cp++ = *src.cp++;
1217                                 break;
1218                         case FLASH_CFI_16BIT:
1219                                 *dst.wp++ = *src.wp++;
1220                                 break;
1221                         case FLASH_CFI_32BIT:
1222                                 *dst.lp++ = *src.lp++;
1223                                 break;
1224                         case FLASH_CFI_64BIT:
1225                                 *dst.llp++ = *src.llp++;
1226                                 break;
1227                         default:
1228                                 return ERR_INVAL;
1229                                 break;
1230                         }
1231                 }
1232                 flash_write_cmd (info, sector, 0,
1233                                  FLASH_CMD_WRITE_BUFFER_CONFIRM);
1234                 retcode =
1235                         flash_full_status_check (info, sector,
1236                                                  info->buffer_write_tout,
1237                                                  "buffer write");
1238         }
1239         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1240         return retcode;
1241 }
1242 #endif /* CFG_USE_FLASH_BUFFER_WRITE */
1243 #endif /* CFG_FLASH_CFI */