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