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  *
   8  * Copyright (C) 2004
   9  * Ed Okerson
  10  *
  11  * Copyright (C) 2006
  12  * Tolunay Orkun <listmember@orkun.us>
  13  *
  14  * See file CREDITS for list of people who contributed to this
  15  * project.
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License as
  19  * published by the Free Software Foundation; either version 2 of
  20  * the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  30  * MA 02111-1307 USA
  31  *
  32  */
  33
  34 /* The DEBUG define must be before common to enable debugging */
  35 /* #define DEBUG        */
  36
  37 #include <common.h>
  38 #include <asm/processor.h>
  39 #include <asm/io.h>
  40 #include <asm/byteorder.h>
  41 #include <environment.h>
  42 #ifdef  CFG_FLASH_CFI_DRIVER
  43
  44 /*
  45  * This file implements a Common Flash Interface (CFI) driver for U-Boot.
  46  * The width of the port and the width of the chips are determined at initialization.
  47  * These widths are used to calculate the address for access CFI data structures.
  48  *
  49  * References
  50  * JEDEC Standard JESD68 - Common Flash Interface (CFI)
  51  * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
  52  * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
  53  * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
  54  * AMD CFI Specification, Release 2.0 December 1, 2001
  55  * AMD/Spansion Application Note: Migration from Single-byte to Three-byte
  56  *   Device IDs, Publication Number 25538 Revision A, November 8, 2001
  57  *
  58  * define CFG_WRITE_SWAPPED_DATA, if you have to swap the Bytes between
  59  * reading and writing ... (yes there is such a Hardware).
  60  */
  61
  62 #ifndef CFG_FLASH_BANKS_LIST
  63 #define CFG_FLASH_BANKS_LIST { CFG_FLASH_BASE }
  64 #endif
  65
  66 #define FLASH_CMD_CFI                   0x98
  67 #define FLASH_CMD_READ_ID               0x90
  68 #define FLASH_CMD_RESET                 0xff
  69 #define FLASH_CMD_BLOCK_ERASE           0x20
  70 #define FLASH_CMD_ERASE_CONFIRM         0xD0
  71 #define FLASH_CMD_WRITE                 0x40
  72 #define FLASH_CMD_PROTECT               0x60
  73 #define FLASH_CMD_PROTECT_SET           0x01
  74 #define FLASH_CMD_PROTECT_CLEAR         0xD0
  75 #define FLASH_CMD_CLEAR_STATUS          0x50
  76 #define FLASH_CMD_WRITE_TO_BUFFER       0xE8
  77 #define FLASH_CMD_WRITE_BUFFER_CONFIRM  0xD0
  78
  79 #define FLASH_STATUS_DONE               0x80
  80 #define FLASH_STATUS_ESS                0x40
  81 #define FLASH_STATUS_ECLBS              0x20
  82 #define FLASH_STATUS_PSLBS              0x10
  83 #define FLASH_STATUS_VPENS              0x08
  84 #define FLASH_STATUS_PSS                0x04
  85 #define FLASH_STATUS_DPS                0x02
  86 #define FLASH_STATUS_R                  0x01
  87 #define FLASH_STATUS_PROTECT            0x01
  88
  89 #define AMD_CMD_RESET                   0xF0
  90 #define AMD_CMD_WRITE                   0xA0
  91 #define AMD_CMD_ERASE_START             0x80
  92 #define AMD_CMD_ERASE_SECTOR            0x30
  93 #define AMD_CMD_UNLOCK_START            0xAA
  94 #define AMD_CMD_UNLOCK_ACK              0x55
  95 #define AMD_CMD_WRITE_TO_BUFFER         0x25
  96 #define AMD_CMD_WRITE_BUFFER_CONFIRM    0x29
  97
  98 #define AMD_STATUS_TOGGLE               0x40
  99 #define AMD_STATUS_ERROR                0x20
 100
 101 #define AMD_ADDR_ERASE_START    ((info->portwidth == FLASH_CFI_8BIT) ? 0xAAA : 0x555)
 102 #define AMD_ADDR_START          ((info->portwidth == FLASH_CFI_8BIT) ? 0xAAA : 0x555)
 103 #define AMD_ADDR_ACK            ((info->portwidth == FLASH_CFI_8BIT) ? 0x555 : 0x2AA)
 104
 105 #define FLASH_OFFSET_MANUFACTURER_ID    0x00
 106 #define FLASH_OFFSET_DEVICE_ID          0x01
 107 #define FLASH_OFFSET_DEVICE_ID2         0x0E
 108 #define FLASH_OFFSET_DEVICE_ID3         0x0F
 109 #define FLASH_OFFSET_CFI                0x55
 110 #define FLASH_OFFSET_CFI_ALT            0x555
 111 #define FLASH_OFFSET_CFI_RESP           0x10
 112 #define FLASH_OFFSET_PRIMARY_VENDOR     0x13
 113 #define FLASH_OFFSET_EXT_QUERY_T_P_ADDR 0x15    /* extended query table primary addr */
 114 #define FLASH_OFFSET_WTOUT              0x1F
 115 #define FLASH_OFFSET_WBTOUT             0x20
 116 #define FLASH_OFFSET_ETOUT              0x21
 117 #define FLASH_OFFSET_CETOUT             0x22
 118 #define FLASH_OFFSET_WMAX_TOUT          0x23
 119 #define FLASH_OFFSET_WBMAX_TOUT         0x24
 120 #define FLASH_OFFSET_EMAX_TOUT          0x25
 121 #define FLASH_OFFSET_CEMAX_TOUT         0x26
 122 #define FLASH_OFFSET_SIZE               0x27
 123 #define FLASH_OFFSET_INTERFACE          0x28
 124 #define FLASH_OFFSET_BUFFER_SIZE        0x2A
 125 #define FLASH_OFFSET_NUM_ERASE_REGIONS  0x2C
 126 #define FLASH_OFFSET_ERASE_REGIONS      0x2D
 127 #define FLASH_OFFSET_PROTECT            0x02
 128 #define FLASH_OFFSET_USER_PROTECTION    0x85
 129 #define FLASH_OFFSET_INTEL_PROTECTION   0x81
 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 #ifdef CFG_FLASH_CFI_AMD_RESET /* needed for STM_ID_29W320DB on UC100 */
 141 # undef  FLASH_CMD_RESET
 142 # define FLASH_CMD_RESET        AMD_CMD_RESET /* use AMD-Reset instead */
 143 #endif
 144
 145 typedef union {
 146         unsigned char c;
 147         unsigned short w;
 148         unsigned long l;
 149         unsigned long long ll;
 150 } cfiword_t;
 151
 152 typedef union {
 153         volatile unsigned char *cp;
 154         volatile unsigned short *wp;
 155         volatile unsigned long *lp;
 156         volatile unsigned long long *llp;
 157 } cfiptr_t;
 158
 159 #define NUM_ERASE_REGIONS       4 /* max. number of erase regions */
 160
 161 static uint flash_offset_cfi[2]={FLASH_OFFSET_CFI,FLASH_OFFSET_CFI_ALT};
 162
 163 /* use CFG_MAX_FLASH_BANKS_DETECT if defined */
 164 #ifdef CFG_MAX_FLASH_BANKS_DETECT
 165 static ulong bank_base[CFG_MAX_FLASH_BANKS_DETECT] = CFG_FLASH_BANKS_LIST;
 166 flash_info_t flash_info[CFG_MAX_FLASH_BANKS_DETECT];    /* FLASH chips info */
 167 #else
 168 static ulong bank_base[CFG_MAX_FLASH_BANKS] = CFG_FLASH_BANKS_LIST;
 169 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];           /* FLASH chips info */
 170 #endif
 171
 172 /*
 173  * Check if chip width is defined. If not, start detecting with 8bit.
 174  */
 175 #ifndef CFG_FLASH_CFI_WIDTH
 176 #define CFG_FLASH_CFI_WIDTH     FLASH_CFI_8BIT
 177 #endif
 178
 179
 180 /*-----------------------------------------------------------------------
 181  * Functions
 182  */
 183
 184 typedef unsigned long flash_sect_t;
 185
 186 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c);
 187 static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf);
 188 static void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
 189 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect);
 190 static int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
 191 static int flash_isset (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
 192 static int flash_toggle (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd);
 193 static void flash_read_jedec_ids (flash_info_t * info);
 194 static int flash_detect_cfi (flash_info_t * info);
 195 static int flash_write_cfiword (flash_info_t * info, ulong dest, cfiword_t cword);
 196 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 197                                     ulong tout, char *prompt);
 198 ulong flash_get_size (ulong base, int banknum);
 199 #if defined(CFG_ENV_IS_IN_FLASH) || defined(CFG_ENV_ADDR_REDUND) || (CFG_MONITOR_BASE >= CFG_FLASH_BASE)
 200 static flash_info_t *flash_get_info(ulong base);
 201 #endif
 202 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 203 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp, int len);
 204 #endif
 205
 206 /*-----------------------------------------------------------------------
 207  * create an address based on the offset and the port width
 208  */
 209 inline uchar *flash_make_addr (flash_info_t * info, flash_sect_t sect, uint offset)
 210 {
 211         return ((uchar *) (info->start[sect] + (offset * info->portwidth)));
 212 }
 213
 214 #ifdef DEBUG
 215 /*-----------------------------------------------------------------------
 216  * Debug support
 217  */
 218 void print_longlong (char *str, unsigned long long data)
 219 {
 220         int i;
 221         char *cp;
 222
 223         cp = (unsigned char *) &data;
 224         for (i = 0; i < 8; i++)
 225                 sprintf (&str[i * 2], "%2.2x", *cp++);
 226 }
 227 static void flash_printqry (flash_info_t * info, flash_sect_t sect)
 228 {
 229         cfiptr_t cptr;
 230         int x, y;
 231
 232         for (x = 0; x < 0x40; x += 16U / info->portwidth) {
 233                 cptr.cp =
 234                         flash_make_addr (info, sect,
 235                                          x + FLASH_OFFSET_CFI_RESP);
 236                 debug ("%p : ", cptr.cp);
 237                 for (y = 0; y < 16; y++) {
 238                         debug ("%2.2x ", cptr.cp[y]);
 239                 }
 240                 debug (" ");
 241                 for (y = 0; y < 16; y++) {
 242                         if (cptr.cp[y] >= 0x20 && cptr.cp[y] <= 0x7e) {
 243                                 debug ("%c", cptr.cp[y]);
 244                         } else {
 245                                 debug (".");
 246                         }
 247                 }
 248                 debug ("\n");
 249         }
 250 }
 251 #endif
 252
 253
 254 /*-----------------------------------------------------------------------
 255  * read a character at a port width address
 256  */
 257 inline uchar flash_read_uchar (flash_info_t * info, uint offset)
 258 {
 259         uchar *cp;
 260
 261         cp = flash_make_addr (info, 0, offset);
 262 #if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
 263         return (cp[0]);
 264 #else
 265         return (cp[info->portwidth - 1]);
 266 #endif
 267 }
 268
 269 /*-----------------------------------------------------------------------
 270  * read a short word by swapping for ppc format.
 271  */
 272 ushort flash_read_ushort (flash_info_t * info, flash_sect_t sect, uint offset)
 273 {
 274         uchar *addr;
 275         ushort retval;
 276
 277 #ifdef DEBUG
 278         int x;
 279 #endif
 280         addr = flash_make_addr (info, sect, offset);
 281
 282 #ifdef DEBUG
 283         debug ("ushort addr is at %p info->portwidth = %d\n", addr,
 284                info->portwidth);
 285         for (x = 0; x < 2 * info->portwidth; x++) {
 286                 debug ("addr[%x] = 0x%x\n", x, addr[x]);
 287         }
 288 #endif
 289 #if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
 290         retval = ((addr[(info->portwidth)] << 8) | addr[0]);
 291 #else
 292         retval = ((addr[(2 * info->portwidth) - 1] << 8) |
 293                   addr[info->portwidth - 1]);
 294 #endif
 295
 296         debug ("retval = 0x%x\n", retval);
 297         return retval;
 298 }
 299
 300 /*-----------------------------------------------------------------------
 301  * read a long word by picking the least significant byte of each maximum
 302  * port size word. Swap for ppc format.
 303  */
 304 ulong flash_read_long (flash_info_t * info, flash_sect_t sect, uint offset)
 305 {
 306         uchar *addr;
 307         ulong retval;
 308
 309 #ifdef DEBUG
 310         int x;
 311 #endif
 312         addr = flash_make_addr (info, sect, offset);
 313
 314 #ifdef DEBUG
 315         debug ("long addr is at %p info->portwidth = %d\n", addr,
 316                info->portwidth);
 317         for (x = 0; x < 4 * info->portwidth; x++) {
 318                 debug ("addr[%x] = 0x%x\n", x, addr[x]);
 319         }
 320 #endif
 321 #if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
 322         retval = (addr[0] << 16) | (addr[(info->portwidth)] << 24) |
 323                 (addr[(2 * info->portwidth)]) | (addr[(3 * info->portwidth)] << 8);
 324 #else
 325         retval = (addr[(2 * info->portwidth) - 1] << 24) |
 326                 (addr[(info->portwidth) - 1] << 16) |
 327                 (addr[(4 * info->portwidth) - 1] << 8) |
 328                 addr[(3 * info->portwidth) - 1];
 329 #endif
 330         return retval;
 331 }
 332
 333
 334 /*-----------------------------------------------------------------------
 335  */
 336 unsigned long flash_init (void)
 337 {
 338         unsigned long size = 0;
 339         int i;
 340
 341 #ifdef CFG_FLASH_PROTECTION
 342         char *s = getenv("unlock");
 343 #endif
 344
 345         /* Init: no FLASHes known */
 346         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
 347                 flash_info[i].flash_id = FLASH_UNKNOWN;
 348                 size += flash_info[i].size = flash_get_size (bank_base[i], i);
 349                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 350 #ifndef CFG_FLASH_QUIET_TEST
 351                         printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 352                                 i+1, flash_info[i].size, flash_info[i].size << 20);
 353 #endif /* CFG_FLASH_QUIET_TEST */
 354                 }
 355 #ifdef CFG_FLASH_PROTECTION
 356                 else if ((s != NULL) && (strcmp(s, "yes") == 0)) {
 357                         /*
 358                          * Only the U-Boot image and it's environment is protected,
 359                          * all other sectors are unprotected (unlocked) if flash
 360                          * hardware protection is used (CFG_FLASH_PROTECTION) and
 361                          * the environment variable "unlock" is set to "yes".
 362                          */
 363                         if (flash_info[i].legacy_unlock) {
 364                                 int k;
 365
 366                                 /*
 367                                  * Disable legacy_unlock temporarily, since
 368                                  * flash_real_protect would relock all other sectors
 369                                  * again otherwise.
 370                                  */
 371                                 flash_info[i].legacy_unlock = 0;
 372
 373                                 /*
 374                                  * Legacy unlocking (e.g. Intel J3) -> unlock only one
 375                                  * sector. This will unlock all sectors.
 376                                  */
 377                                 flash_real_protect (&flash_info[i], 0, 0);
 378
 379                                 flash_info[i].legacy_unlock = 1;
 380
 381                                 /*
 382                                  * Manually mark other sectors as unlocked (unprotected)
 383                                  */
 384                                 for (k = 1; k < flash_info[i].sector_count; k++)
 385                                         flash_info[i].protect[k] = 0;
 386                         } else {
 387                                 /*
 388                                  * No legancy unlocking -> unlock all sectors
 389                                  */
 390                                 flash_protect (FLAG_PROTECT_CLEAR,
 391                                                flash_info[i].start[0],
 392                                                flash_info[i].start[0] + flash_info[i].size - 1,
 393                                                &flash_info[i]);
 394                         }
 395                 }
 396 #endif /* CFG_FLASH_PROTECTION */
 397         }
 398
 399         /* Monitor protection ON by default */
 400 #if (CFG_MONITOR_BASE >= CFG_FLASH_BASE)
 401         flash_protect (FLAG_PROTECT_SET,
 402                        CFG_MONITOR_BASE,
 403                        CFG_MONITOR_BASE + monitor_flash_len  - 1,
 404                        flash_get_info(CFG_MONITOR_BASE));
 405 #endif
 406
 407         /* Environment protection ON by default */
 408 #ifdef CFG_ENV_IS_IN_FLASH
 409         flash_protect (FLAG_PROTECT_SET,
 410                        CFG_ENV_ADDR,
 411                        CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
 412                        flash_get_info(CFG_ENV_ADDR));
 413 #endif
 414
 415         /* Redundant environment protection ON by default */
 416 #ifdef CFG_ENV_ADDR_REDUND
 417         flash_protect (FLAG_PROTECT_SET,
 418                        CFG_ENV_ADDR_REDUND,
 419                        CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
 420                        flash_get_info(CFG_ENV_ADDR_REDUND));
 421 #endif
 422         return (size);
 423 }
 424
 425 /*-----------------------------------------------------------------------
 426  */
 427 #if defined(CFG_ENV_IS_IN_FLASH) || defined(CFG_ENV_ADDR_REDUND) || (CFG_MONITOR_BASE >= CFG_FLASH_BASE)
 428 static flash_info_t *flash_get_info(ulong base)
 429 {
 430         int i;
 431         flash_info_t * info = 0;
 432
 433         for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
 434                 info = & flash_info[i];
 435                 if (info->size && info->start[0] <= base &&
 436                     base <= info->start[0] + info->size - 1)
 437                         break;
 438         }
 439
 440         return i == CFG_MAX_FLASH_BANKS ? 0 : info;
 441 }
 442 #endif
 443
 444 /*-----------------------------------------------------------------------
 445  */
 446 int flash_erase (flash_info_t * info, int s_first, int s_last)
 447 {
 448         int rcode = 0;
 449         int prot;
 450         flash_sect_t sect;
 451
 452         if (info->flash_id != FLASH_MAN_CFI) {
 453                 puts ("Can't erase unknown flash type - aborted\n");
 454                 return 1;
 455         }
 456         if ((s_first < 0) || (s_first > s_last)) {
 457                 puts ("- no sectors to erase\n");
 458                 return 1;
 459         }
 460
 461         prot = 0;
 462         for (sect = s_first; sect <= s_last; ++sect) {
 463                 if (info->protect[sect]) {
 464                         prot++;
 465                 }
 466         }
 467         if (prot) {
 468                 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 469         } else {
 470                 putc ('\n');
 471         }
 472
 473
 474         for (sect = s_first; sect <= s_last; sect++) {
 475                 if (info->protect[sect] == 0) { /* not protected */
 476                         switch (info->vendor) {
 477                         case CFI_CMDSET_INTEL_STANDARD:
 478                         case CFI_CMDSET_INTEL_EXTENDED:
 479                                 flash_write_cmd (info, sect, 0, FLASH_CMD_CLEAR_STATUS);
 480                                 flash_write_cmd (info, sect, 0, FLASH_CMD_BLOCK_ERASE);
 481                                 flash_write_cmd (info, sect, 0, FLASH_CMD_ERASE_CONFIRM);
 482                                 break;
 483                         case CFI_CMDSET_AMD_STANDARD:
 484                         case CFI_CMDSET_AMD_EXTENDED:
 485                                 flash_unlock_seq (info, sect);
 486                                 flash_write_cmd (info, sect, AMD_ADDR_ERASE_START,
 487                                                         AMD_CMD_ERASE_START);
 488                                 flash_unlock_seq (info, sect);
 489                                 flash_write_cmd (info, sect, 0, AMD_CMD_ERASE_SECTOR);
 490                                 break;
 491                         default:
 492                                 debug ("Unkown flash vendor %d\n",
 493                                        info->vendor);
 494                                 break;
 495                         }
 496
 497                         if (flash_full_status_check
 498                             (info, sect, info->erase_blk_tout, "erase")) {
 499                                 rcode = 1;
 500                         } else
 501                                 putc ('.');
 502                 }
 503         }
 504         puts (" done\n");
 505         return rcode;
 506 }
 507
 508 /*-----------------------------------------------------------------------
 509  */
 510 void flash_print_info (flash_info_t * info)
 511 {
 512         int i;
 513
 514         if (info->flash_id != FLASH_MAN_CFI) {
 515                 puts ("missing or unknown FLASH type\n");
 516                 return;
 517         }
 518
 519         printf ("CFI conformant FLASH (%d x %d)",
 520                 (info->portwidth << 3), (info->chipwidth << 3));
 521         printf ("  Size: %ld MB in %d Sectors\n",
 522                 info->size >> 20, info->sector_count);
 523         printf ("  ");
 524         switch (info->vendor) {
 525                 case CFI_CMDSET_INTEL_STANDARD:
 526                         printf ("Intel Standard");
 527                         break;
 528                 case CFI_CMDSET_INTEL_EXTENDED:
 529                         printf ("Intel Extended");
 530                         break;
 531                 case CFI_CMDSET_AMD_STANDARD:
 532                         printf ("AMD Standard");
 533                         break;
 534                 case CFI_CMDSET_AMD_EXTENDED:
 535                         printf ("AMD Extended");
 536                         break;
 537                 default:
 538                         printf ("Unknown (%d)", info->vendor);
 539                         break;
 540         }
 541         printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x%02X",
 542                 info->manufacturer_id, info->device_id);
 543         if (info->device_id == 0x7E) {
 544                 printf("%04X", info->device_id2);
 545         }
 546         printf ("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
 547                 info->erase_blk_tout,
 548                 info->write_tout);
 549         if (info->buffer_size > 1) {
 550                 printf ("  Buffer write timeout: %ld ms, buffer size: %d bytes\n",
 551                 info->buffer_write_tout,
 552                 info->buffer_size);
 553         }
 554
 555         puts ("\n  Sector Start Addresses:");
 556         for (i = 0; i < info->sector_count; ++i) {
 557                 if ((i % 5) == 0)
 558                         printf ("\n");
 559 #ifdef CFG_FLASH_EMPTY_INFO
 560                 int k;
 561                 int size;
 562                 int erased;
 563                 volatile unsigned long *flash;
 564
 565                 /*
 566                  * Check if whole sector is erased
 567                  */
 568                 if (i != (info->sector_count - 1))
 569                         size = info->start[i + 1] - info->start[i];
 570                 else
 571                         size = info->start[0] + info->size - info->start[i];
 572                 erased = 1;
 573                 flash = (volatile unsigned long *) info->start[i];
 574                 size = size >> 2;       /* divide by 4 for longword access */
 575                 for (k = 0; k < size; k++) {
 576                         if (*flash++ != 0xffffffff) {
 577                                 erased = 0;
 578                                 break;
 579                         }
 580                 }
 581
 582                 /* print empty and read-only info */
 583                 printf ("  %08lX %c %s ",
 584                         info->start[i],
 585                         erased ? 'E' : ' ',
 586                         info->protect[i] ? "RO" : "  ");
 587 #else   /* ! CFG_FLASH_EMPTY_INFO */
 588                 printf ("  %08lX   %s ",
 589                         info->start[i],
 590                         info->protect[i] ? "RO" : "  ");
 591 #endif
 592         }
 593         putc ('\n');
 594         return;
 595 }
 596
 597 /*-----------------------------------------------------------------------
 598  * Copy memory to flash, returns:
 599  * 0 - OK
 600  * 1 - write timeout
 601  * 2 - Flash not erased
 602  */
 603 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 604 {
 605         ulong wp;
 606         ulong cp;
 607         int aln;
 608         cfiword_t cword;
 609         int i, rc;
 610
 611 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 612         int buffered_size;
 613 #endif
 614         /* get lower aligned address */
 615         /* get lower aligned address */
 616         wp = (addr & ~(info->portwidth - 1));
 617
 618         /* handle unaligned start */
 619         if ((aln = addr - wp) != 0) {
 620                 cword.l = 0;
 621                 cp = wp;
 622                 for (i = 0; i < aln; ++i, ++cp)
 623                         flash_add_byte (info, &cword, (*(uchar *) cp));
 624
 625                 for (; (i < info->portwidth) && (cnt > 0); i++) {
 626                         flash_add_byte (info, &cword, *src++);
 627                         cnt--;
 628                         cp++;
 629                 }
 630                 for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
 631                         flash_add_byte (info, &cword, (*(uchar *) cp));
 632                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
 633                         return rc;
 634                 wp = cp;
 635         }
 636
 637         /* handle the aligned part */
 638 #ifdef CFG_FLASH_USE_BUFFER_WRITE
 639         buffered_size = (info->portwidth / info->chipwidth);
 640         buffered_size *= info->buffer_size;
 641         while (cnt >= info->portwidth) {
 642                 /* prohibit buffer write when buffer_size is 1 */
 643                 if (info->buffer_size == 1) {
 644                         cword.l = 0;
 645                         for (i = 0; i < info->portwidth; i++)
 646                                 flash_add_byte (info, &cword, *src++);
 647                         if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
 648                                 return rc;
 649                         wp += info->portwidth;
 650                         cnt -= info->portwidth;
 651                         continue;
 652                 }
 653
 654                 /* write buffer until next buffered_size aligned boundary */
 655                 i = buffered_size - (wp % buffered_size);
 656                 if (i > cnt)
 657                         i = cnt;
 658                 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
 659                         return rc;
 660                 i -= i & (info->portwidth - 1);
 661                 wp += i;
 662                 src += i;
 663                 cnt -= i;
 664         }
 665 #else
 666         while (cnt >= info->portwidth) {
 667                 cword.l = 0;
 668                 for (i = 0; i < info->portwidth; i++) {
 669                         flash_add_byte (info, &cword, *src++);
 670                 }
 671                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
 672                         return rc;
 673                 wp += info->portwidth;
 674                 cnt -= info->portwidth;
 675         }
 676 #endif /* CFG_FLASH_USE_BUFFER_WRITE */
 677         if (cnt == 0) {
 678                 return (0);
 679         }
 680
 681         /*
 682          * handle unaligned tail bytes
 683          */
 684         cword.l = 0;
 685         for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) {
 686                 flash_add_byte (info, &cword, *src++);
 687                 --cnt;
 688         }
 689         for (; i < info->portwidth; ++i, ++cp) {
 690                 flash_add_byte (info, &cword, (*(uchar *) cp));
 691         }
 692
 693         return flash_write_cfiword (info, wp, cword);
 694 }
 695
 696 /*-----------------------------------------------------------------------
 697  */
 698 #ifdef CFG_FLASH_PROTECTION
 699
 700 int flash_real_protect (flash_info_t * info, long sector, int prot)
 701 {
 702         int retcode = 0;
 703
 704         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 705         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
 706         if (prot)
 707                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
 708         else
 709                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
 710
 711         if ((retcode =
 712              flash_full_status_check (info, sector, info->erase_blk_tout,
 713                                       prot ? "protect" : "unprotect")) == 0) {
 714
 715                 info->protect[sector] = prot;
 716
 717                 /*
 718                  * On some of Intel's flash chips (marked via legacy_unlock)
 719                  * unprotect unprotects all locking.
 720                  */
 721                 if ((prot == 0) && (info->legacy_unlock)) {
 722                         flash_sect_t i;
 723
 724                         for (i = 0; i < info->sector_count; i++) {
 725                                 if (info->protect[i])
 726                                         flash_real_protect (info, i, 1);
 727                         }
 728                 }
 729         }
 730         return retcode;
 731 }
 732
 733 /*-----------------------------------------------------------------------
 734  * flash_read_user_serial - read the OneTimeProgramming cells
 735  */
 736 void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
 737                              int len)
 738 {
 739         uchar *src;
 740         uchar *dst;
 741
 742         dst = buffer;
 743         src = flash_make_addr (info, 0, FLASH_OFFSET_USER_PROTECTION);
 744         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
 745         memcpy (dst, src + offset, len);
 746         flash_write_cmd (info, 0, 0, info->cmd_reset);
 747 }
 748
 749 /*
 750  * flash_read_factory_serial - read the device Id from the protection area
 751  */
 752 void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
 753                                 int len)
 754 {
 755         uchar *src;
 756
 757         src = flash_make_addr (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
 758         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
 759         memcpy (buffer, src + offset, len);
 760         flash_write_cmd (info, 0, 0, info->cmd_reset);
 761 }
 762
 763 #endif /* CFG_FLASH_PROTECTION */
 764
 765 /*
 766  * flash_is_busy - check to see if the flash is busy
 767  * This routine checks the status of the chip and returns true if the chip is busy
 768  */
 769 static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
 770 {
 771         int retval;
 772
 773         switch (info->vendor) {
 774         case CFI_CMDSET_INTEL_STANDARD:
 775         case CFI_CMDSET_INTEL_EXTENDED:
 776                 retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
 777                 break;
 778         case CFI_CMDSET_AMD_STANDARD:
 779         case CFI_CMDSET_AMD_EXTENDED:
 780                 retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
 781                 break;
 782         default:
 783                 retval = 0;
 784         }
 785         debug ("flash_is_busy: %d\n", retval);
 786         return retval;
 787 }
 788
 789 /*-----------------------------------------------------------------------
 790  *  wait for XSR.7 to be set. Time out with an error if it does not.
 791  *  This routine does not set the flash to read-array mode.
 792  */
 793 static int flash_status_check (flash_info_t * info, flash_sect_t sector,
 794                                ulong tout, char *prompt)
 795 {
 796         ulong start;
 797
 798 #if CFG_HZ != 1000
 799         tout *= CFG_HZ/1000;
 800 #endif
 801
 802         /* Wait for command completion */
 803         start = get_timer (0);
 804         while (flash_is_busy (info, sector)) {
 805                 if (get_timer (start) > tout) {
 806                         printf ("Flash %s timeout at address %lx data %lx\n",
 807                                 prompt, info->start[sector],
 808                                 flash_read_long (info, sector, 0));
 809                         flash_write_cmd (info, sector, 0, info->cmd_reset);
 810                         return ERR_TIMOUT;
 811                 }
 812                 udelay (1);             /* also triggers watchdog */
 813         }
 814         return ERR_OK;
 815 }
 816
 817 /*-----------------------------------------------------------------------
 818  * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check.
 819  * This routine sets the flash to read-array mode.
 820  */
 821 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 822                                     ulong tout, char *prompt)
 823 {
 824         int retcode;
 825
 826         retcode = flash_status_check (info, sector, tout, prompt);
 827         switch (info->vendor) {
 828         case CFI_CMDSET_INTEL_EXTENDED:
 829         case CFI_CMDSET_INTEL_STANDARD:
 830                 if ((retcode == ERR_OK)
 831                     && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 832                         retcode = ERR_INVAL;
 833                         printf ("Flash %s error at address %lx\n", prompt,
 834                                 info->start[sector]);
 835                         if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) {
 836                                 puts ("Command Sequence Error.\n");
 837                         } else if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS)) {
 838                                 puts ("Block Erase Error.\n");
 839                                 retcode = ERR_NOT_ERASED;
 840                         } else if (flash_isset (info, sector, 0, FLASH_STATUS_PSLBS)) {
 841                                 puts ("Locking Error\n");
 842                         }
 843                         if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
 844                                 puts ("Block locked.\n");
 845                                 retcode = ERR_PROTECTED;
 846                         }
 847                         if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
 848                                 puts ("Vpp Low Error.\n");
 849                 }
 850                 flash_write_cmd (info, sector, 0, info->cmd_reset);
 851                 break;
 852         default:
 853                 break;
 854         }
 855         return retcode;
 856 }
 857
 858 /*-----------------------------------------------------------------------
 859  */
 860 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 861 {
 862 #if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
 863         unsigned short  w;
 864         unsigned int    l;
 865         unsigned long long ll;
 866 #endif
 867
 868         switch (info->portwidth) {
 869         case FLASH_CFI_8BIT:
 870                 cword->c = c;
 871                 break;
 872         case FLASH_CFI_16BIT:
 873 #if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
 874                 w = c;
 875                 w <<= 8;
 876                 cword->w = (cword->w >> 8) | w;
 877 #else
 878                 cword->w = (cword->w << 8) | c;
 879 #endif
 880                 break;
 881         case FLASH_CFI_32BIT:
 882 #if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
 883                 l = c;
 884                 l <<= 24;
 885                 cword->l = (cword->l >> 8) | l;
 886 #else
 887                 cword->l = (cword->l << 8) | c;
 888 #endif
 889                 break;
 890         case FLASH_CFI_64BIT:
 891 #if defined(__LITTLE_ENDIAN) && !defined(CFG_WRITE_SWAPPED_DATA)
 892                 ll = c;
 893                 ll <<= 56;
 894                 cword->ll = (cword->ll >> 8) | ll;
 895 #else
 896                 cword->ll = (cword->ll << 8) | c;
 897 #endif
 898                 break;
 899         }
 900 }
 901
 902
 903 /*-----------------------------------------------------------------------
 904  * make a proper sized command based on the port and chip widths
 905  */
 906 static void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
 907 {
 908         int i;
 909         uchar *cp = (uchar *) cmdbuf;
 910
 911 #if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
 912         for (i = info->portwidth; i > 0; i--)
 913 #else
 914         for (i = 1; i <= info->portwidth; i++)
 915 #endif
 916                 *cp++ = (i & (info->chipwidth - 1)) ? '\0' : cmd;
 917 }
 918
 919 /*
 920  * Write a proper sized command to the correct address
 921  */
 922 static void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
 923 {
 924
 925         volatile cfiptr_t addr;
 926         cfiword_t cword;
 927
 928         addr.cp = flash_make_addr (info, sect, offset);
 929         flash_make_cmd (info, cmd, &cword);
 930         switch (info->portwidth) {
 931         case FLASH_CFI_8BIT:
 932                 debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr.cp, cmd,
 933                        cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 934                 *addr.cp = cword.c;
 935                 break;
 936         case FLASH_CFI_16BIT:
 937                 debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr.wp,
 938                        cmd, cword.w,
 939                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 940                 *addr.wp = cword.w;
 941                 break;
 942         case FLASH_CFI_32BIT:
 943                 debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr.lp,
 944                        cmd, cword.l,
 945                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 946                 *addr.lp = cword.l;
 947                 break;
 948         case FLASH_CFI_64BIT:
 949 #ifdef DEBUG
 950                 {
 951                         char str[20];
 952
 953                         print_longlong (str, cword.ll);
 954
 955                         debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
 956                                addr.llp, cmd, str,
 957                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 958                 }
 959 #endif
 960                 *addr.llp = cword.ll;
 961                 break;
 962         }
 963
 964         /* Ensure all the instructions are fully finished */
 965         sync();
 966 }
 967
 968 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
 969 {
 970         flash_write_cmd (info, sect, AMD_ADDR_START, AMD_CMD_UNLOCK_START);
 971         flash_write_cmd (info, sect, AMD_ADDR_ACK, AMD_CMD_UNLOCK_ACK);
 972 }
 973
 974 /*-----------------------------------------------------------------------
 975  */
 976 static int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
 977 {
 978         cfiptr_t cptr;
 979         cfiword_t cword;
 980         int retval;
 981
 982         cptr.cp = flash_make_addr (info, sect, offset);
 983         flash_make_cmd (info, cmd, &cword);
 984
 985         debug ("is= cmd %x(%c) addr %p ", cmd, cmd, cptr.cp);
 986         switch (info->portwidth) {
 987         case FLASH_CFI_8BIT:
 988                 debug ("is= %x %x\n", cptr.cp[0], cword.c);
 989                 retval = (cptr.cp[0] == cword.c);
 990                 break;
 991         case FLASH_CFI_16BIT:
 992                 debug ("is= %4.4x %4.4x\n", cptr.wp[0], cword.w);
 993                 retval = (cptr.wp[0] == cword.w);
 994                 break;
 995         case FLASH_CFI_32BIT:
 996                 debug ("is= %8.8lx %8.8lx\n", cptr.lp[0], cword.l);
 997                 retval = (cptr.lp[0] == cword.l);
 998                 break;
 999         case FLASH_CFI_64BIT:
1000 #ifdef DEBUG
1001                 {
1002                         char str1[20];
1003                         char str2[20];
1004
1005                         print_longlong (str1, cptr.llp[0]);
1006                         print_longlong (str2, cword.ll);
1007                         debug ("is= %s %s\n", str1, str2);
1008                 }
1009 #endif
1010                 retval = (cptr.llp[0] == cword.ll);
1011                 break;
1012         default:
1013                 retval = 0;
1014                 break;
1015         }
1016         return retval;
1017 }
1018
1019 /*-----------------------------------------------------------------------
1020  */
1021 static int flash_isset (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
1022 {
1023         cfiptr_t cptr;
1024         cfiword_t cword;
1025         int retval;
1026
1027         cptr.cp = flash_make_addr (info, sect, offset);
1028         flash_make_cmd (info, cmd, &cword);
1029         switch (info->portwidth) {
1030         case FLASH_CFI_8BIT:
1031                 retval = ((cptr.cp[0] & cword.c) == cword.c);
1032                 break;
1033         case FLASH_CFI_16BIT:
1034                 retval = ((cptr.wp[0] & cword.w) == cword.w);
1035                 break;
1036         case FLASH_CFI_32BIT:
1037                 retval = ((cptr.lp[0] & cword.l) == cword.l);
1038                 break;
1039         case FLASH_CFI_64BIT:
1040                 retval = ((cptr.llp[0] & cword.ll) == cword.ll);
1041                 break;
1042         default:
1043                 retval = 0;
1044                 break;
1045         }
1046         return retval;
1047 }
1048
1049 /*-----------------------------------------------------------------------
1050  */
1051 static int flash_toggle (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
1052 {
1053         cfiptr_t cptr;
1054         cfiword_t cword;
1055         int retval;
1056
1057         cptr.cp = flash_make_addr (info, sect, offset);
1058         flash_make_cmd (info, cmd, &cword);
1059         switch (info->portwidth) {
1060         case FLASH_CFI_8BIT:
1061                 retval = ((cptr.cp[0] & cword.c) != (cptr.cp[0] & cword.c));
1062                 break;
1063         case FLASH_CFI_16BIT:
1064                 retval = ((cptr.wp[0] & cword.w) != (cptr.wp[0] & cword.w));
1065                 break;
1066         case FLASH_CFI_32BIT:
1067                 retval = ((cptr.lp[0] & cword.l) != (cptr.lp[0] & cword.l));
1068                 break;
1069         case FLASH_CFI_64BIT:
1070                 retval = ((cptr.llp[0] & cword.ll) !=
1071                           (cptr.llp[0] & cword.ll));
1072                 break;
1073         default:
1074                 retval = 0;
1075                 break;
1076         }
1077         return retval;
1078 }
1079
1080 /*-----------------------------------------------------------------------
1081  * read jedec ids from device and set corresponding fields in info struct
1082  *
1083  * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
1084  *
1085 */
1086 static void flash_read_jedec_ids (flash_info_t * info)
1087 {
1088         info->manufacturer_id = 0;
1089         info->device_id       = 0;
1090         info->device_id2      = 0;
1091
1092         switch (info->vendor) {
1093         case CFI_CMDSET_INTEL_STANDARD:
1094         case CFI_CMDSET_INTEL_EXTENDED:
1095                 flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1096                 flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1097                 udelay(1000); /* some flash are slow to respond */
1098                 info->manufacturer_id = flash_read_uchar (info,
1099                                                 FLASH_OFFSET_MANUFACTURER_ID);
1100                 info->device_id = flash_read_uchar (info,
1101                                                 FLASH_OFFSET_DEVICE_ID);
1102                 flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1103                 break;
1104         case CFI_CMDSET_AMD_STANDARD:
1105         case CFI_CMDSET_AMD_EXTENDED:
1106                 flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1107                 flash_unlock_seq(info, 0);
1108                 flash_write_cmd(info, 0, AMD_ADDR_START, FLASH_CMD_READ_ID);
1109                 udelay(1000); /* some flash are slow to respond */
1110                 info->manufacturer_id = flash_read_uchar (info,
1111                                                 FLASH_OFFSET_MANUFACTURER_ID);
1112                 info->device_id = flash_read_uchar (info,
1113                                                 FLASH_OFFSET_DEVICE_ID);
1114                 if (info->device_id == 0x7E) {
1115                         /* AMD 3-byte (expanded) device ids */
1116                         info->device_id2 = flash_read_uchar (info,
1117                                                 FLASH_OFFSET_DEVICE_ID2);
1118                         info->device_id2 <<= 8;
1119                         info->device_id2 |= flash_read_uchar (info,
1120                                                 FLASH_OFFSET_DEVICE_ID3);
1121                 }
1122                 flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1123                 break;
1124         default:
1125                 break;
1126         }
1127 }
1128
1129 /*-----------------------------------------------------------------------
1130  * detect if flash is compatible with the Common Flash Interface (CFI)
1131  * http://www.jedec.org/download/search/jesd68.pdf
1132  *
1133 */
1134 static int flash_detect_cfi (flash_info_t * info)
1135 {
1136         int cfi_offset;
1137         debug ("flash detect cfi\n");
1138
1139         for (info->portwidth = CFG_FLASH_CFI_WIDTH;
1140              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
1141                 for (info->chipwidth = FLASH_CFI_BY8;
1142                      info->chipwidth <= info->portwidth;
1143                      info->chipwidth <<= 1) {
1144                         flash_write_cmd (info, 0, 0, info->cmd_reset);
1145                         for (cfi_offset=0; cfi_offset < sizeof(flash_offset_cfi)/sizeof(uint); cfi_offset++) {
1146                                 flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset], FLASH_CMD_CFI);
1147                                 if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
1148                                  && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
1149                                  && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
1150                                         info->interface = flash_read_ushort (info, 0, FLASH_OFFSET_INTERFACE);
1151                                         info->cfi_offset=flash_offset_cfi[cfi_offset];
1152                                         debug ("device interface is %d\n",
1153                                                 info->interface);
1154                                         debug ("found port %d chip %d ",
1155                                                 info->portwidth, info->chipwidth);
1156                                         debug ("port %d bits chip %d bits\n",
1157                                                 info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1158                                                 info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1159                                         return 1;
1160                                 }
1161                         }
1162                 }
1163         }
1164         debug ("not found\n");
1165         return 0;
1166 }
1167
1168 /*
1169  * The following code cannot be run from FLASH!
1170  *
1171  */
1172 ulong flash_get_size (ulong base, int banknum)
1173 {
1174         flash_info_t *info = &flash_info[banknum];
1175         int i, j;
1176         flash_sect_t sect_cnt;
1177         unsigned long sector;
1178         unsigned long tmp;
1179         int size_ratio;
1180         uchar num_erase_regions;
1181         int erase_region_size;
1182         int erase_region_count;
1183         int geometry_reversed = 0;
1184
1185         info->ext_addr = 0;
1186         info->cfi_version = 0;
1187 #ifdef CFG_FLASH_PROTECTION
1188         info->legacy_unlock = 0;
1189 #endif
1190
1191         info->start[0] = base;
1192
1193         if (flash_detect_cfi (info)) {
1194                 info->vendor = flash_read_ushort (info, 0,
1195                                         FLASH_OFFSET_PRIMARY_VENDOR);
1196                 flash_read_jedec_ids (info);
1197                 flash_write_cmd (info, 0, info->cfi_offset, FLASH_CMD_CFI);
1198                 num_erase_regions = flash_read_uchar (info,
1199                                         FLASH_OFFSET_NUM_ERASE_REGIONS);
1200                 info->ext_addr = flash_read_ushort (info, 0,
1201                                         FLASH_OFFSET_EXT_QUERY_T_P_ADDR);
1202                 if (info->ext_addr) {
1203                         info->cfi_version = (ushort) flash_read_uchar (info,
1204                                                 info->ext_addr + 3) << 8;
1205                         info->cfi_version |= (ushort) flash_read_uchar (info,
1206                                                 info->ext_addr + 4);
1207                 }
1208 #ifdef DEBUG
1209                 flash_printqry (info, 0);
1210 #endif
1211                 switch (info->vendor) {
1212                 case CFI_CMDSET_INTEL_STANDARD:
1213                 case CFI_CMDSET_INTEL_EXTENDED:
1214                 default:
1215                         info->cmd_reset = FLASH_CMD_RESET;
1216 #ifdef CFG_FLASH_PROTECTION
1217                         /* read legacy lock/unlock bit from intel flash */
1218                         if (info->ext_addr) {
1219                                 info->legacy_unlock = flash_read_uchar (info,
1220                                                 info->ext_addr + 5) & 0x08;
1221                         }
1222 #endif
1223                         break;
1224                 case CFI_CMDSET_AMD_STANDARD:
1225                 case CFI_CMDSET_AMD_EXTENDED:
1226                         info->cmd_reset = AMD_CMD_RESET;
1227                         /* check if flash geometry needs reversal */
1228                         if (num_erase_regions <= 1)
1229                                 break;
1230                         /* reverse geometry if top boot part */
1231                         if (info->cfi_version < 0x3131) {
1232                                 /* CFI < 1.1, try to guess from device id */
1233                                 if ((info->device_id & 0x80) != 0) {
1234                                         geometry_reversed = 1;
1235                                 }
1236                                 break;
1237                         }
1238                         /* CFI >= 1.1, deduct from top/bottom flag */
1239                         /* note: ext_addr is valid since cfi_version > 0 */
1240                         if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
1241                                 geometry_reversed = 1;
1242                         }
1243                         break;
1244                 }
1245
1246                 debug ("manufacturer is %d\n", info->vendor);
1247                 debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
1248                 debug ("device id is 0x%x\n", info->device_id);
1249                 debug ("device id2 is 0x%x\n", info->device_id2);
1250                 debug ("cfi version is 0x%04x\n", info->cfi_version);
1251
1252                 size_ratio = info->portwidth / info->chipwidth;
1253                 /* if the chip is x8/x16 reduce the ratio by half */
1254                 if ((info->interface == FLASH_CFI_X8X16)
1255                     && (info->chipwidth == FLASH_CFI_BY8)) {
1256                         size_ratio >>= 1;
1257                 }
1258                 debug ("size_ratio %d port %d bits chip %d bits\n",
1259                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1260                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1261                 debug ("found %d erase regions\n", num_erase_regions);
1262                 sect_cnt = 0;
1263                 sector = base;
1264                 for (i = 0; i < num_erase_regions; i++) {
1265                         if (i > NUM_ERASE_REGIONS) {
1266                                 printf ("%d erase regions found, only %d used\n",
1267                                         num_erase_regions, NUM_ERASE_REGIONS);
1268                                 break;
1269                         }
1270                         if (geometry_reversed)
1271                                 tmp = flash_read_long (info, 0,
1272                                                FLASH_OFFSET_ERASE_REGIONS +
1273                                                (num_erase_regions - 1 - i) * 4);
1274                         else
1275                                 tmp = flash_read_long (info, 0,
1276                                                FLASH_OFFSET_ERASE_REGIONS +
1277                                                i * 4);
1278                         erase_region_size =
1279                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
1280                         tmp >>= 16;
1281                         erase_region_count = (tmp & 0xffff) + 1;
1282                         debug ("erase_region_count = %d erase_region_size = %d\n",
1283                                 erase_region_count, erase_region_size);
1284                         for (j = 0; j < erase_region_count; j++) {
1285                                 info->start[sect_cnt] = sector;
1286                                 sector += (erase_region_size * size_ratio);
1287
1288                                 /*
1289                                  * Only read protection status from supported devices (intel...)
1290                                  */
1291                                 switch (info->vendor) {
1292                                 case CFI_CMDSET_INTEL_EXTENDED:
1293                                 case CFI_CMDSET_INTEL_STANDARD:
1294                                         info->protect[sect_cnt] =
1295                                                 flash_isset (info, sect_cnt,
1296                                                              FLASH_OFFSET_PROTECT,
1297                                                              FLASH_STATUS_PROTECT);
1298                                         break;
1299                                 default:
1300                                         info->protect[sect_cnt] = 0; /* default: not protected */
1301                                 }
1302
1303                                 sect_cnt++;
1304                         }
1305                 }
1306
1307                 info->sector_count = sect_cnt;
1308                 /* multiply the size by the number of chips */
1309                 info->size = (1 << flash_read_uchar (info, FLASH_OFFSET_SIZE)) * size_ratio;
1310                 info->buffer_size = (1 << flash_read_ushort (info, 0, FLASH_OFFSET_BUFFER_SIZE));
1311                 tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT);
1312                 info->erase_blk_tout = (tmp * (1 << flash_read_uchar (info, FLASH_OFFSET_EMAX_TOUT)));
1313                 tmp = (1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT)) *
1314                         (1 << flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT));
1315                 info->buffer_write_tout = tmp / 1000 + (tmp % 1000 ? 1 : 0); /* round up when converting to ms */
1316                 tmp = (1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT)) *
1317                       (1 << flash_read_uchar (info, FLASH_OFFSET_WMAX_TOUT));
1318                 info->write_tout = tmp / 1000 + (tmp % 1000 ? 1 : 0); /* round up when converting to ms */
1319                 info->flash_id = FLASH_MAN_CFI;
1320                 if ((info->interface == FLASH_CFI_X8X16) && (info->chipwidth == FLASH_CFI_BY8)) {
1321                         info->portwidth >>= 1;  /* XXX - Need to test on x8/x16 in parallel. */
1322                 }
1323         }
1324
1325         flash_write_cmd (info, 0, 0, info->cmd_reset);
1326         return (info->size);
1327 }
1328
1329 /* loop through the sectors from the highest address
1330  * when the passed address is greater or equal to the sector address
1331  * we have a match
1332  */
1333 static flash_sect_t find_sector (flash_info_t * info, ulong addr)
1334 {
1335         flash_sect_t sector;
1336
1337         for (sector = info->sector_count - 1; sector >= 0; sector--) {
1338                 if (addr >= info->start[sector])
1339                         break;
1340         }
1341         return sector;
1342 }
1343
1344 /*-----------------------------------------------------------------------
1345  */
1346 static int flash_write_cfiword (flash_info_t * info, ulong dest,
1347                                 cfiword_t cword)
1348 {
1349         cfiptr_t ctladdr;
1350         cfiptr_t cptr;
1351         int flag;
1352
1353         ctladdr.cp = flash_make_addr (info, 0, 0);
1354         cptr.cp = (uchar *) dest;
1355
1356         /* Check if Flash is (sufficiently) erased */
1357         switch (info->portwidth) {
1358         case FLASH_CFI_8BIT:
1359                 flag = ((cptr.cp[0] & cword.c) == cword.c);
1360                 break;
1361         case FLASH_CFI_16BIT:
1362                 flag = ((cptr.wp[0] & cword.w) == cword.w);
1363                 break;
1364         case FLASH_CFI_32BIT:
1365                 flag = ((cptr.lp[0] & cword.l) == cword.l);
1366                 break;
1367         case FLASH_CFI_64BIT:
1368                 flag = ((cptr.llp[0] & cword.ll) == cword.ll);
1369                 break;
1370         default:
1371                 return 2;
1372         }
1373         if (!flag)
1374                 return 2;
1375
1376         /* Disable interrupts which might cause a timeout here */
1377         flag = disable_interrupts ();
1378
1379         switch (info->vendor) {
1380         case CFI_CMDSET_INTEL_EXTENDED:
1381         case CFI_CMDSET_INTEL_STANDARD:
1382                 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
1383                 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
1384                 break;
1385         case CFI_CMDSET_AMD_EXTENDED:
1386         case CFI_CMDSET_AMD_STANDARD:
1387                 flash_unlock_seq (info, 0);
1388                 flash_write_cmd (info, 0, AMD_ADDR_START, AMD_CMD_WRITE);
1389                 break;
1390         }
1391
1392         switch (info->portwidth) {
1393         case FLASH_CFI_8BIT:
1394                 cptr.cp[0] = cword.c;
1395                 break;
1396         case FLASH_CFI_16BIT:
1397                 cptr.wp[0] = cword.w;
1398                 break;
1399         case FLASH_CFI_32BIT:
1400                 cptr.lp[0] = cword.l;
1401                 break;
1402         case FLASH_CFI_64BIT:
1403                 cptr.llp[0] = cword.ll;
1404                 break;
1405         }
1406
1407         /* re-enable interrupts if necessary */
1408         if (flag)
1409                 enable_interrupts ();
1410
1411         return flash_full_status_check (info, find_sector (info, dest),
1412                                         info->write_tout, "write");
1413 }
1414
1415 #ifdef CFG_FLASH_USE_BUFFER_WRITE
1416
1417 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
1418                                   int len)
1419 {
1420         flash_sect_t sector;
1421         int cnt;
1422         int retcode;
1423         volatile cfiptr_t src;
1424         volatile cfiptr_t dst;
1425
1426         switch (info->vendor) {
1427         case CFI_CMDSET_INTEL_STANDARD:
1428         case CFI_CMDSET_INTEL_EXTENDED:
1429                 src.cp = cp;
1430                 dst.cp = (uchar *) dest;
1431                 sector = find_sector (info, dest);
1432                 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1433                 flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
1434                 if ((retcode = flash_status_check (info, sector, info->buffer_write_tout,
1435                                                    "write to buffer")) == ERR_OK) {
1436                         /* reduce the number of loops by the width of the port  */
1437                         switch (info->portwidth) {
1438                         case FLASH_CFI_8BIT:
1439                                 cnt = len;
1440                                 break;
1441                         case FLASH_CFI_16BIT:
1442                                 cnt = len >> 1;
1443                                 break;
1444                         case FLASH_CFI_32BIT:
1445                                 cnt = len >> 2;
1446                                 break;
1447                         case FLASH_CFI_64BIT:
1448                                 cnt = len >> 3;
1449                                 break;
1450                         default:
1451                                 return ERR_INVAL;
1452                                 break;
1453                         }
1454                         flash_write_cmd (info, sector, 0, (uchar) cnt - 1);
1455                         while (cnt-- > 0) {
1456                                 switch (info->portwidth) {
1457                                 case FLASH_CFI_8BIT:
1458                                         *dst.cp++ = *src.cp++;
1459                                         break;
1460                                 case FLASH_CFI_16BIT:
1461                                         *dst.wp++ = *src.wp++;
1462                                         break;
1463                                 case FLASH_CFI_32BIT:
1464                                         *dst.lp++ = *src.lp++;
1465                                         break;
1466                                 case FLASH_CFI_64BIT:
1467                                         *dst.llp++ = *src.llp++;
1468                                         break;
1469                                 default:
1470                                         return ERR_INVAL;
1471                                         break;
1472                                 }
1473                         }
1474                         flash_write_cmd (info, sector, 0,
1475                                          FLASH_CMD_WRITE_BUFFER_CONFIRM);
1476                         retcode = flash_full_status_check (info, sector,
1477                                                            info->buffer_write_tout,
1478                                                            "buffer write");
1479                 }
1480                 return retcode;
1481
1482         case CFI_CMDSET_AMD_STANDARD:
1483         case CFI_CMDSET_AMD_EXTENDED:
1484                 src.cp = cp;
1485                 dst.cp = (uchar *) dest;
1486                 sector = find_sector (info, dest);
1487
1488                 flash_unlock_seq(info,0);
1489                 flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_TO_BUFFER);
1490
1491                 switch (info->portwidth) {
1492                 case FLASH_CFI_8BIT:
1493                         cnt = len;
1494                         flash_write_cmd (info, sector, 0,  (uchar) cnt - 1);
1495                         while (cnt-- > 0) *dst.cp++ = *src.cp++;
1496                         break;
1497                 case FLASH_CFI_16BIT:
1498                         cnt = len >> 1;
1499                         flash_write_cmd (info, sector, 0,  (uchar) cnt - 1);
1500                         while (cnt-- > 0) *dst.wp++ = *src.wp++;
1501                         break;
1502                 case FLASH_CFI_32BIT:
1503                         cnt = len >> 2;
1504                         flash_write_cmd (info, sector, 0,  (uchar) cnt - 1);
1505                         while (cnt-- > 0) *dst.lp++ = *src.lp++;
1506                         break;
1507                 case FLASH_CFI_64BIT:
1508                         cnt = len >> 3;
1509                         flash_write_cmd (info, sector, 0,  (uchar) cnt - 1);
1510                         while (cnt-- > 0) *dst.llp++ = *src.llp++;
1511                         break;
1512                 default:
1513                         return ERR_INVAL;
1514                 }
1515
1516                 flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
1517                 retcode = flash_full_status_check (info, sector, info->buffer_write_tout,
1518                                                    "buffer write");
1519                 return retcode;
1520
1521         default:
1522                 debug ("Unknown Command Set\n");
1523                 return ERR_INVAL;
1524         }
1525 }
1526 #endif /* CFG_FLASH_USE_BUFFER_WRITE */
1527
1528 #endif /* CFG_FLASH_CFI */