drivers/mtd/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 #include <mtd/cfi_flash.h>
  43
  44 /*
  45  * This file implements a Common Flash Interface (CFI) driver for
  46  * U-Boot.
  47  *
  48  * The width of the port and the width of the chips are determined at
  49  * initialization.  These widths are used to calculate the address for
  50  * access CFI data structures.
  51  *
  52  * References
  53  * JEDEC Standard JESD68 - Common Flash Interface (CFI)
  54  * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
  55  * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
  56  * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
  57  * AMD CFI Specification, Release 2.0 December 1, 2001
  58  * AMD/Spansion Application Note: Migration from Single-byte to Three-byte
  59  *   Device IDs, Publication Number 25538 Revision A, November 8, 2001
  60  *
  61  * Define CONFIG_SYS_WRITE_SWAPPED_DATA, if you have to swap the Bytes between
  62  * reading and writing ... (yes there is such a Hardware).
  63  */
  64
  65 #ifndef CONFIG_SYS_FLASH_BANKS_LIST
  66 #define CONFIG_SYS_FLASH_BANKS_LIST { CONFIG_SYS_FLASH_BASE }
  67 #endif
  68
  69 static uint flash_offset_cfi[2] = { FLASH_OFFSET_CFI, FLASH_OFFSET_CFI_ALT };
  70 static uint flash_verbose = 1;
  71
  72 /* use CONFIG_SYS_MAX_FLASH_BANKS_DETECT if defined */
  73 #ifdef CONFIG_SYS_MAX_FLASH_BANKS_DETECT
  74 # define CFI_MAX_FLASH_BANKS    CONFIG_SYS_MAX_FLASH_BANKS_DETECT
  75 #else
  76 # define CFI_MAX_FLASH_BANKS    CONFIG_SYS_MAX_FLASH_BANKS
  77 #endif
  78
  79 flash_info_t flash_info[CFI_MAX_FLASH_BANKS];   /* FLASH chips info */
  80
  81 /*
  82  * Check if chip width is defined. If not, start detecting with 8bit.
  83  */
  84 #ifndef CONFIG_SYS_FLASH_CFI_WIDTH
  85 #define CONFIG_SYS_FLASH_CFI_WIDTH      FLASH_CFI_8BIT
  86 #endif
  87
  88 static void __flash_write8(u8 value, void *addr)
  89 {
  90         __raw_writeb(value, addr);
  91 }
  92
  93 static void __flash_write16(u16 value, void *addr)
  94 {
  95         __raw_writew(value, addr);
  96 }
  97
  98 static void __flash_write32(u32 value, void *addr)
  99 {
 100         __raw_writel(value, addr);
 101 }
 102
 103 static void __flash_write64(u64 value, void *addr)
 104 {
 105         /* No architectures currently implement __raw_writeq() */
 106         *(volatile u64 *)addr = value;
 107 }
 108
 109 static u8 __flash_read8(void *addr)
 110 {
 111         return __raw_readb(addr);
 112 }
 113
 114 static u16 __flash_read16(void *addr)
 115 {
 116         return __raw_readw(addr);
 117 }
 118
 119 static u32 __flash_read32(void *addr)
 120 {
 121         return __raw_readl(addr);
 122 }
 123
 124 static u64 __flash_read64(void *addr)
 125 {
 126         /* No architectures currently implement __raw_readq() */
 127         return *(volatile u64 *)addr;
 128 }
 129
 130 #ifdef CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS
 131 void flash_write8(u8 value, void *addr)__attribute__((weak, alias("__flash_write8")));
 132 void flash_write16(u16 value, void *addr)__attribute__((weak, alias("__flash_write16")));
 133 void flash_write32(u32 value, void *addr)__attribute__((weak, alias("__flash_write32")));
 134 void flash_write64(u64 value, void *addr)__attribute__((weak, alias("__flash_write64")));
 135 u8 flash_read8(void *addr)__attribute__((weak, alias("__flash_read8")));
 136 u16 flash_read16(void *addr)__attribute__((weak, alias("__flash_read16")));
 137 u32 flash_read32(void *addr)__attribute__((weak, alias("__flash_read32")));
 138 u64 flash_read64(void *addr)__attribute__((weak, alias("__flash_read64")));
 139 #else
 140 #define flash_write8    __flash_write8
 141 #define flash_write16   __flash_write16
 142 #define flash_write32   __flash_write32
 143 #define flash_write64   __flash_write64
 144 #define flash_read8     __flash_read8
 145 #define flash_read16    __flash_read16
 146 #define flash_read32    __flash_read32
 147 #define flash_read64    __flash_read64
 148 #endif
 149
 150 /*-----------------------------------------------------------------------
 151  */
 152 #if defined(CONFIG_ENV_IS_IN_FLASH) || defined(CONFIG_ENV_ADDR_REDUND) || (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
 153 flash_info_t *flash_get_info(ulong base)
 154 {
 155         int i;
 156         flash_info_t * info = 0;
 157
 158         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 159                 info = & flash_info[i];
 160                 if (info->size && info->start[0] <= base &&
 161                     base <= info->start[0] + info->size - 1)
 162                         break;
 163         }
 164
 165         return i == CONFIG_SYS_MAX_FLASH_BANKS ? 0 : info;
 166 }
 167 #endif
 168
 169 unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect)
 170 {
 171         if (sect != (info->sector_count - 1))
 172                 return info->start[sect + 1] - info->start[sect];
 173         else
 174                 return info->start[0] + info->size - info->start[sect];
 175 }
 176
 177 /*-----------------------------------------------------------------------
 178  * create an address based on the offset and the port width
 179  */
 180 static inline void *
 181 flash_map (flash_info_t * info, flash_sect_t sect, uint offset)
 182 {
 183         unsigned int byte_offset = offset * info->portwidth;
 184
 185         return (void *)(info->start[sect] + byte_offset);
 186 }
 187
 188 static inline void flash_unmap(flash_info_t *info, flash_sect_t sect,
 189                 unsigned int offset, void *addr)
 190 {
 191 }
 192
 193 /*-----------------------------------------------------------------------
 194  * make a proper sized command based on the port and chip widths
 195  */
 196 static void flash_make_cmd(flash_info_t *info, u32 cmd, void *cmdbuf)
 197 {
 198         int i;
 199         int cword_offset;
 200         int cp_offset;
 201 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 202         u32 cmd_le = cpu_to_le32(cmd);
 203 #endif
 204         uchar val;
 205         uchar *cp = (uchar *) cmdbuf;
 206
 207         for (i = info->portwidth; i > 0; i--){
 208                 cword_offset = (info->portwidth-i)%info->chipwidth;
 209 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 210                 cp_offset = info->portwidth - i;
 211                 val = *((uchar*)&cmd_le + cword_offset);
 212 #else
 213                 cp_offset = i - 1;
 214                 val = *((uchar*)&cmd + sizeof(u32) - cword_offset - 1);
 215 #endif
 216                 cp[cp_offset] = (cword_offset >= sizeof(u32)) ? 0x00 : val;
 217         }
 218 }
 219
 220 #ifdef DEBUG
 221 /*-----------------------------------------------------------------------
 222  * Debug support
 223  */
 224 static void print_longlong (char *str, unsigned long long data)
 225 {
 226         int i;
 227         char *cp;
 228
 229         cp = (char *) &data;
 230         for (i = 0; i < 8; i++)
 231                 sprintf (&str[i * 2], "%2.2x", *cp++);
 232 }
 233
 234 static void flash_printqry (struct cfi_qry *qry)
 235 {
 236         u8 *p = (u8 *)qry;
 237         int x, y;
 238
 239         for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
 240                 debug("%02x : ", x);
 241                 for (y = 0; y < 16; y++)
 242                         debug("%2.2x ", p[x + y]);
 243                 debug(" ");
 244                 for (y = 0; y < 16; y++) {
 245                         unsigned char c = p[x + y];
 246                         if (c >= 0x20 && c <= 0x7e)
 247                                 debug("%c", c);
 248                         else
 249                                 debug(".");
 250                 }
 251                 debug("\n");
 252         }
 253 }
 254 #endif
 255
 256
 257 /*-----------------------------------------------------------------------
 258  * read a character at a port width address
 259  */
 260 static inline uchar flash_read_uchar (flash_info_t * info, uint offset)
 261 {
 262         uchar *cp;
 263         uchar retval;
 264
 265         cp = flash_map (info, 0, offset);
 266 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 267         retval = flash_read8(cp);
 268 #else
 269         retval = flash_read8(cp + info->portwidth - 1);
 270 #endif
 271         flash_unmap (info, 0, offset, cp);
 272         return retval;
 273 }
 274
 275 /*-----------------------------------------------------------------------
 276  * read a word at a port width address, assume 16bit bus
 277  */
 278 static inline ushort flash_read_word (flash_info_t * info, uint offset)
 279 {
 280         ushort *addr, retval;
 281
 282         addr = flash_map (info, 0, offset);
 283         retval = flash_read16 (addr);
 284         flash_unmap (info, 0, offset, addr);
 285         return retval;
 286 }
 287
 288
 289 /*-----------------------------------------------------------------------
 290  * read a long word by picking the least significant byte of each maximum
 291  * port size word. Swap for ppc format.
 292  */
 293 static ulong flash_read_long (flash_info_t * info, flash_sect_t sect,
 294                               uint offset)
 295 {
 296         uchar *addr;
 297         ulong retval;
 298
 299 #ifdef DEBUG
 300         int x;
 301 #endif
 302         addr = flash_map (info, sect, offset);
 303
 304 #ifdef DEBUG
 305         debug ("long addr is at %p info->portwidth = %d\n", addr,
 306                info->portwidth);
 307         for (x = 0; x < 4 * info->portwidth; x++) {
 308                 debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
 309         }
 310 #endif
 311 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 312         retval = ((flash_read8(addr) << 16) |
 313                   (flash_read8(addr + info->portwidth) << 24) |
 314                   (flash_read8(addr + 2 * info->portwidth)) |
 315                   (flash_read8(addr + 3 * info->portwidth) << 8));
 316 #else
 317         retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) |
 318                   (flash_read8(addr + info->portwidth - 1) << 16) |
 319                   (flash_read8(addr + 4 * info->portwidth - 1) << 8) |
 320                   (flash_read8(addr + 3 * info->portwidth - 1)));
 321 #endif
 322         flash_unmap(info, sect, offset, addr);
 323
 324         return retval;
 325 }
 326
 327 /*
 328  * Write a proper sized command to the correct address
 329  */
 330 void flash_write_cmd (flash_info_t * info, flash_sect_t sect,
 331                       uint offset, u32 cmd)
 332 {
 333
 334         void *addr;
 335         cfiword_t cword;
 336
 337         addr = flash_map (info, sect, offset);
 338         flash_make_cmd (info, cmd, &cword);
 339         switch (info->portwidth) {
 340         case FLASH_CFI_8BIT:
 341                 debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr, cmd,
 342                        cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 343                 flash_write8(cword.c, addr);
 344                 break;
 345         case FLASH_CFI_16BIT:
 346                 debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr,
 347                        cmd, cword.w,
 348                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 349                 flash_write16(cword.w, addr);
 350                 break;
 351         case FLASH_CFI_32BIT:
 352                 debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr,
 353                        cmd, cword.l,
 354                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 355                 flash_write32(cword.l, addr);
 356                 break;
 357         case FLASH_CFI_64BIT:
 358 #ifdef DEBUG
 359                 {
 360                         char str[20];
 361
 362                         print_longlong (str, cword.ll);
 363
 364                         debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
 365                                addr, cmd, str,
 366                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 367                 }
 368 #endif
 369                 flash_write64(cword.ll, addr);
 370                 break;
 371         }
 372
 373         /* Ensure all the instructions are fully finished */
 374         sync();
 375
 376         flash_unmap(info, sect, offset, addr);
 377 }
 378
 379 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
 380 {
 381         flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_UNLOCK_START);
 382         flash_write_cmd (info, sect, info->addr_unlock2, AMD_CMD_UNLOCK_ACK);
 383 }
 384
 385 /*-----------------------------------------------------------------------
 386  */
 387 static int flash_isequal (flash_info_t * info, flash_sect_t sect,
 388                           uint offset, uchar cmd)
 389 {
 390         void *addr;
 391         cfiword_t cword;
 392         int retval;
 393
 394         addr = flash_map (info, sect, offset);
 395         flash_make_cmd (info, cmd, &cword);
 396
 397         debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
 398         switch (info->portwidth) {
 399         case FLASH_CFI_8BIT:
 400                 debug ("is= %x %x\n", flash_read8(addr), cword.c);
 401                 retval = (flash_read8(addr) == cword.c);
 402                 break;
 403         case FLASH_CFI_16BIT:
 404                 debug ("is= %4.4x %4.4x\n", flash_read16(addr), cword.w);
 405                 retval = (flash_read16(addr) == cword.w);
 406                 break;
 407         case FLASH_CFI_32BIT:
 408                 debug ("is= %8.8x %8.8lx\n", flash_read32(addr), cword.l);
 409                 retval = (flash_read32(addr) == cword.l);
 410                 break;
 411         case FLASH_CFI_64BIT:
 412 #ifdef DEBUG
 413                 {
 414                         char str1[20];
 415                         char str2[20];
 416
 417                         print_longlong (str1, flash_read64(addr));
 418                         print_longlong (str2, cword.ll);
 419                         debug ("is= %s %s\n", str1, str2);
 420                 }
 421 #endif
 422                 retval = (flash_read64(addr) == cword.ll);
 423                 break;
 424         default:
 425                 retval = 0;
 426                 break;
 427         }
 428         flash_unmap(info, sect, offset, addr);
 429
 430         return retval;
 431 }
 432
 433 /*-----------------------------------------------------------------------
 434  */
 435 static int flash_isset (flash_info_t * info, flash_sect_t sect,
 436                         uint offset, uchar cmd)
 437 {
 438         void *addr;
 439         cfiword_t cword;
 440         int retval;
 441
 442         addr = flash_map (info, sect, offset);
 443         flash_make_cmd (info, cmd, &cword);
 444         switch (info->portwidth) {
 445         case FLASH_CFI_8BIT:
 446                 retval = ((flash_read8(addr) & cword.c) == cword.c);
 447                 break;
 448         case FLASH_CFI_16BIT:
 449                 retval = ((flash_read16(addr) & cword.w) == cword.w);
 450                 break;
 451         case FLASH_CFI_32BIT:
 452                 retval = ((flash_read32(addr) & cword.l) == cword.l);
 453                 break;
 454         case FLASH_CFI_64BIT:
 455                 retval = ((flash_read64(addr) & cword.ll) == cword.ll);
 456                 break;
 457         default:
 458                 retval = 0;
 459                 break;
 460         }
 461         flash_unmap(info, sect, offset, addr);
 462
 463         return retval;
 464 }
 465
 466 /*-----------------------------------------------------------------------
 467  */
 468 static int flash_toggle (flash_info_t * info, flash_sect_t sect,
 469                          uint offset, uchar cmd)
 470 {
 471         void *addr;
 472         cfiword_t cword;
 473         int retval;
 474
 475         addr = flash_map (info, sect, offset);
 476         flash_make_cmd (info, cmd, &cword);
 477         switch (info->portwidth) {
 478         case FLASH_CFI_8BIT:
 479                 retval = flash_read8(addr) != flash_read8(addr);
 480                 break;
 481         case FLASH_CFI_16BIT:
 482                 retval = flash_read16(addr) != flash_read16(addr);
 483                 break;
 484         case FLASH_CFI_32BIT:
 485                 retval = flash_read32(addr) != flash_read32(addr);
 486                 break;
 487         case FLASH_CFI_64BIT:
 488                 retval = ( (flash_read32( addr ) != flash_read32( addr )) ||
 489                            (flash_read32(addr+4) != flash_read32(addr+4)) );
 490                 break;
 491         default:
 492                 retval = 0;
 493                 break;
 494         }
 495         flash_unmap(info, sect, offset, addr);
 496
 497         return retval;
 498 }
 499
 500 /*
 501  * flash_is_busy - check to see if the flash is busy
 502  *
 503  * This routine checks the status of the chip and returns true if the
 504  * chip is busy.
 505  */
 506 static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
 507 {
 508         int retval;
 509
 510         switch (info->vendor) {
 511         case CFI_CMDSET_INTEL_PROG_REGIONS:
 512         case CFI_CMDSET_INTEL_STANDARD:
 513         case CFI_CMDSET_INTEL_EXTENDED:
 514                 retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
 515                 break;
 516         case CFI_CMDSET_AMD_STANDARD:
 517         case CFI_CMDSET_AMD_EXTENDED:
 518 #ifdef CONFIG_FLASH_CFI_LEGACY
 519         case CFI_CMDSET_AMD_LEGACY:
 520 #endif
 521                 retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
 522                 break;
 523         default:
 524                 retval = 0;
 525         }
 526         debug ("flash_is_busy: %d\n", retval);
 527         return retval;
 528 }
 529
 530 /*-----------------------------------------------------------------------
 531  *  wait for XSR.7 to be set. Time out with an error if it does not.
 532  *  This routine does not set the flash to read-array mode.
 533  */
 534 static int flash_status_check (flash_info_t * info, flash_sect_t sector,
 535                                ulong tout, char *prompt)
 536 {
 537         ulong start;
 538
 539 #if CONFIG_SYS_HZ != 1000
 540         tout *= CONFIG_SYS_HZ/1000;
 541 #endif
 542
 543         /* Wait for command completion */
 544         start = get_timer (0);
 545         while (flash_is_busy (info, sector)) {
 546                 if (get_timer (start) > tout) {
 547                         printf ("Flash %s timeout at address %lx data %lx\n",
 548                                 prompt, info->start[sector],
 549                                 flash_read_long (info, sector, 0));
 550                         flash_write_cmd (info, sector, 0, info->cmd_reset);
 551                         return ERR_TIMOUT;
 552                 }
 553                 udelay (1);             /* also triggers watchdog */
 554         }
 555         return ERR_OK;
 556 }
 557
 558 /*-----------------------------------------------------------------------
 559  * Wait for XSR.7 to be set, if it times out print an error, otherwise
 560  * do a full status check.
 561  *
 562  * This routine sets the flash to read-array mode.
 563  */
 564 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 565                                     ulong tout, char *prompt)
 566 {
 567         int retcode;
 568
 569         retcode = flash_status_check (info, sector, tout, prompt);
 570         switch (info->vendor) {
 571         case CFI_CMDSET_INTEL_PROG_REGIONS:
 572         case CFI_CMDSET_INTEL_EXTENDED:
 573         case CFI_CMDSET_INTEL_STANDARD:
 574                 if ((retcode != ERR_OK)
 575                     && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 576                         retcode = ERR_INVAL;
 577                         printf ("Flash %s error at address %lx\n", prompt,
 578                                 info->start[sector]);
 579                         if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS |
 580                                          FLASH_STATUS_PSLBS)) {
 581                                 puts ("Command Sequence Error.\n");
 582                         } else if (flash_isset (info, sector, 0,
 583                                                 FLASH_STATUS_ECLBS)) {
 584                                 puts ("Block Erase Error.\n");
 585                                 retcode = ERR_NOT_ERASED;
 586                         } else if (flash_isset (info, sector, 0,
 587                                                 FLASH_STATUS_PSLBS)) {
 588                                 puts ("Locking Error\n");
 589                         }
 590                         if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
 591                                 puts ("Block locked.\n");
 592                                 retcode = ERR_PROTECTED;
 593                         }
 594                         if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
 595                                 puts ("Vpp Low Error.\n");
 596                 }
 597                 flash_write_cmd (info, sector, 0, info->cmd_reset);
 598                 break;
 599         default:
 600                 break;
 601         }
 602         return retcode;
 603 }
 604
 605 /*-----------------------------------------------------------------------
 606  */
 607 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 608 {
 609 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 610         unsigned short  w;
 611         unsigned int    l;
 612         unsigned long long ll;
 613 #endif
 614
 615         switch (info->portwidth) {
 616         case FLASH_CFI_8BIT:
 617                 cword->c = c;
 618                 break;
 619         case FLASH_CFI_16BIT:
 620 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 621                 w = c;
 622                 w <<= 8;
 623                 cword->w = (cword->w >> 8) | w;
 624 #else
 625                 cword->w = (cword->w << 8) | c;
 626 #endif
 627                 break;
 628         case FLASH_CFI_32BIT:
 629 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 630                 l = c;
 631                 l <<= 24;
 632                 cword->l = (cword->l >> 8) | l;
 633 #else
 634                 cword->l = (cword->l << 8) | c;
 635 #endif
 636                 break;
 637         case FLASH_CFI_64BIT:
 638 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 639                 ll = c;
 640                 ll <<= 56;
 641                 cword->ll = (cword->ll >> 8) | ll;
 642 #else
 643                 cword->ll = (cword->ll << 8) | c;
 644 #endif
 645                 break;
 646         }
 647 }
 648
 649 /*
 650  * Loop through the sector table starting from the previously found sector.
 651  * Searches forwards or backwards, dependent on the passed address.
 652  */
 653 static flash_sect_t find_sector (flash_info_t * info, ulong addr)
 654 {
 655         static flash_sect_t saved_sector = 0; /* previously found sector */
 656         flash_sect_t sector = saved_sector;
 657
 658         while ((info->start[sector] < addr)
 659                         && (sector < info->sector_count - 1))
 660                 sector++;
 661         while ((info->start[sector] > addr) && (sector > 0))
 662                 /*
 663                  * also decrements the sector in case of an overshot
 664                  * in the first loop
 665                  */
 666                 sector--;
 667
 668         saved_sector = sector;
 669         return sector;
 670 }
 671
 672 /*-----------------------------------------------------------------------
 673  */
 674 static int flash_write_cfiword (flash_info_t * info, ulong dest,
 675                                 cfiword_t cword)
 676 {
 677         void *dstaddr = (void *)dest;
 678         int flag;
 679         flash_sect_t sect = 0;
 680         char sect_found = 0;
 681
 682         /* Check if Flash is (sufficiently) erased */
 683         switch (info->portwidth) {
 684         case FLASH_CFI_8BIT:
 685                 flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
 686                 break;
 687         case FLASH_CFI_16BIT:
 688                 flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
 689                 break;
 690         case FLASH_CFI_32BIT:
 691                 flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
 692                 break;
 693         case FLASH_CFI_64BIT:
 694                 flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
 695                 break;
 696         default:
 697                 flag = 0;
 698                 break;
 699         }
 700         if (!flag)
 701                 return ERR_NOT_ERASED;
 702
 703         /* Disable interrupts which might cause a timeout here */
 704         flag = disable_interrupts ();
 705
 706         switch (info->vendor) {
 707         case CFI_CMDSET_INTEL_PROG_REGIONS:
 708         case CFI_CMDSET_INTEL_EXTENDED:
 709         case CFI_CMDSET_INTEL_STANDARD:
 710                 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
 711                 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
 712                 break;
 713         case CFI_CMDSET_AMD_EXTENDED:
 714         case CFI_CMDSET_AMD_STANDARD:
 715                 sect = find_sector(info, dest);
 716                 flash_unlock_seq (info, sect);
 717                 flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE);
 718                 sect_found = 1;
 719                 break;
 720 #ifdef CONFIG_FLASH_CFI_LEGACY
 721         case CFI_CMDSET_AMD_LEGACY:
 722                 sect = find_sector(info, dest);
 723                 flash_unlock_seq (info, 0);
 724                 flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_WRITE);
 725                 sect_found = 1;
 726                 break;
 727 #endif
 728         }
 729
 730         switch (info->portwidth) {
 731         case FLASH_CFI_8BIT:
 732                 flash_write8(cword.c, dstaddr);
 733                 break;
 734         case FLASH_CFI_16BIT:
 735                 flash_write16(cword.w, dstaddr);
 736                 break;
 737         case FLASH_CFI_32BIT:
 738                 flash_write32(cword.l, dstaddr);
 739                 break;
 740         case FLASH_CFI_64BIT:
 741                 flash_write64(cword.ll, dstaddr);
 742                 break;
 743         }
 744
 745         /* re-enable interrupts if necessary */
 746         if (flag)
 747                 enable_interrupts ();
 748
 749         if (!sect_found)
 750                 sect = find_sector (info, dest);
 751
 752         return flash_full_status_check (info, sect, info->write_tout, "write");
 753 }
 754
 755 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 756
 757 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
 758                                   int len)
 759 {
 760         flash_sect_t sector;
 761         int cnt;
 762         int retcode;
 763         void *src = cp;
 764         void *dst = (void *)dest;
 765         void *dst2 = dst;
 766         int flag = 0;
 767         uint offset = 0;
 768         unsigned int shift;
 769         uchar write_cmd;
 770
 771         switch (info->portwidth) {
 772         case FLASH_CFI_8BIT:
 773                 shift = 0;
 774                 break;
 775         case FLASH_CFI_16BIT:
 776                 shift = 1;
 777                 break;
 778         case FLASH_CFI_32BIT:
 779                 shift = 2;
 780                 break;
 781         case FLASH_CFI_64BIT:
 782                 shift = 3;
 783                 break;
 784         default:
 785                 retcode = ERR_INVAL;
 786                 goto out_unmap;
 787         }
 788
 789         cnt = len >> shift;
 790
 791         while ((cnt-- > 0) && (flag == 0)) {
 792                 switch (info->portwidth) {
 793                 case FLASH_CFI_8BIT:
 794                         flag = ((flash_read8(dst2) & flash_read8(src)) ==
 795                                 flash_read8(src));
 796                         src += 1, dst2 += 1;
 797                         break;
 798                 case FLASH_CFI_16BIT:
 799                         flag = ((flash_read16(dst2) & flash_read16(src)) ==
 800                                 flash_read16(src));
 801                         src += 2, dst2 += 2;
 802                         break;
 803                 case FLASH_CFI_32BIT:
 804                         flag = ((flash_read32(dst2) & flash_read32(src)) ==
 805                                 flash_read32(src));
 806                         src += 4, dst2 += 4;
 807                         break;
 808                 case FLASH_CFI_64BIT:
 809                         flag = ((flash_read64(dst2) & flash_read64(src)) ==
 810                                 flash_read64(src));
 811                         src += 8, dst2 += 8;
 812                         break;
 813                 }
 814         }
 815         if (!flag) {
 816                 retcode = ERR_NOT_ERASED;
 817                 goto out_unmap;
 818         }
 819
 820         src = cp;
 821         sector = find_sector (info, dest);
 822
 823         switch (info->vendor) {
 824         case CFI_CMDSET_INTEL_PROG_REGIONS:
 825         case CFI_CMDSET_INTEL_STANDARD:
 826         case CFI_CMDSET_INTEL_EXTENDED:
 827                 write_cmd = (info->vendor == CFI_CMDSET_INTEL_PROG_REGIONS) ?
 828                                         FLASH_CMD_WRITE_BUFFER_PROG : FLASH_CMD_WRITE_TO_BUFFER;
 829                 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 830                 flash_write_cmd (info, sector, 0, FLASH_CMD_READ_STATUS);
 831                 flash_write_cmd (info, sector, 0, write_cmd);
 832                 retcode = flash_status_check (info, sector,
 833                                               info->buffer_write_tout,
 834                                               "write to buffer");
 835                 if (retcode == ERR_OK) {
 836                         /* reduce the number of loops by the width of
 837                          * the port */
 838                         cnt = len >> shift;
 839                         flash_write_cmd (info, sector, 0, cnt - 1);
 840                         while (cnt-- > 0) {
 841                                 switch (info->portwidth) {
 842                                 case FLASH_CFI_8BIT:
 843                                         flash_write8(flash_read8(src), dst);
 844                                         src += 1, dst += 1;
 845                                         break;
 846                                 case FLASH_CFI_16BIT:
 847                                         flash_write16(flash_read16(src), dst);
 848                                         src += 2, dst += 2;
 849                                         break;
 850                                 case FLASH_CFI_32BIT:
 851                                         flash_write32(flash_read32(src), dst);
 852                                         src += 4, dst += 4;
 853                                         break;
 854                                 case FLASH_CFI_64BIT:
 855                                         flash_write64(flash_read64(src), dst);
 856                                         src += 8, dst += 8;
 857                                         break;
 858                                 default:
 859                                         retcode = ERR_INVAL;
 860                                         goto out_unmap;
 861                                 }
 862                         }
 863                         flash_write_cmd (info, sector, 0,
 864                                          FLASH_CMD_WRITE_BUFFER_CONFIRM);
 865                         retcode = flash_full_status_check (
 866                                 info, sector, info->buffer_write_tout,
 867                                 "buffer write");
 868                 }
 869
 870                 break;
 871
 872         case CFI_CMDSET_AMD_STANDARD:
 873         case CFI_CMDSET_AMD_EXTENDED:
 874                 flash_unlock_seq(info,0);
 875
 876 #ifdef CONFIG_FLASH_SPANSION_S29WS_N
 877                 offset = ((unsigned long)dst - info->start[sector]) >> shift;
 878 #endif
 879                 flash_write_cmd(info, sector, offset, AMD_CMD_WRITE_TO_BUFFER);
 880                 cnt = len >> shift;
 881                 flash_write_cmd(info, sector, offset, cnt - 1);
 882
 883                 switch (info->portwidth) {
 884                 case FLASH_CFI_8BIT:
 885                         while (cnt-- > 0) {
 886                                 flash_write8(flash_read8(src), dst);
 887                                 src += 1, dst += 1;
 888                         }
 889                         break;
 890                 case FLASH_CFI_16BIT:
 891                         while (cnt-- > 0) {
 892                                 flash_write16(flash_read16(src), dst);
 893                                 src += 2, dst += 2;
 894                         }
 895                         break;
 896                 case FLASH_CFI_32BIT:
 897                         while (cnt-- > 0) {
 898                                 flash_write32(flash_read32(src), dst);
 899                                 src += 4, dst += 4;
 900                         }
 901                         break;
 902                 case FLASH_CFI_64BIT:
 903                         while (cnt-- > 0) {
 904                                 flash_write64(flash_read64(src), dst);
 905                                 src += 8, dst += 8;
 906                         }
 907                         break;
 908                 default:
 909                         retcode = ERR_INVAL;
 910                         goto out_unmap;
 911                 }
 912
 913                 flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
 914                 retcode = flash_full_status_check (info, sector,
 915                                                    info->buffer_write_tout,
 916                                                    "buffer write");
 917                 break;
 918
 919         default:
 920                 debug ("Unknown Command Set\n");
 921                 retcode = ERR_INVAL;
 922                 break;
 923         }
 924
 925 out_unmap:
 926         return retcode;
 927 }
 928 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
 929
 930
 931 /*-----------------------------------------------------------------------
 932  */
 933 int flash_erase (flash_info_t * info, int s_first, int s_last)
 934 {
 935         int rcode = 0;
 936         int prot;
 937         flash_sect_t sect;
 938
 939         if (info->flash_id != FLASH_MAN_CFI) {
 940                 puts ("Can't erase unknown flash type - aborted\n");
 941                 return 1;
 942         }
 943         if ((s_first < 0) || (s_first > s_last)) {
 944                 puts ("- no sectors to erase\n");
 945                 return 1;
 946         }
 947
 948         prot = 0;
 949         for (sect = s_first; sect <= s_last; ++sect) {
 950                 if (info->protect[sect]) {
 951                         prot++;
 952                 }
 953         }
 954         if (prot) {
 955                 printf ("- Warning: %d protected sectors will not be erased!\n",
 956                         prot);
 957         } else if (flash_verbose) {
 958                 putc ('\n');
 959         }
 960
 961
 962         for (sect = s_first; sect <= s_last; sect++) {
 963                 if (info->protect[sect] == 0) { /* not protected */
 964                         switch (info->vendor) {
 965                         case CFI_CMDSET_INTEL_PROG_REGIONS:
 966                         case CFI_CMDSET_INTEL_STANDARD:
 967                         case CFI_CMDSET_INTEL_EXTENDED:
 968                                 flash_write_cmd (info, sect, 0,
 969                                                  FLASH_CMD_CLEAR_STATUS);
 970                                 flash_write_cmd (info, sect, 0,
 971                                                  FLASH_CMD_BLOCK_ERASE);
 972                                 flash_write_cmd (info, sect, 0,
 973                                                  FLASH_CMD_ERASE_CONFIRM);
 974                                 break;
 975                         case CFI_CMDSET_AMD_STANDARD:
 976                         case CFI_CMDSET_AMD_EXTENDED:
 977                                 flash_unlock_seq (info, sect);
 978                                 flash_write_cmd (info, sect,
 979                                                 info->addr_unlock1,
 980                                                 AMD_CMD_ERASE_START);
 981                                 flash_unlock_seq (info, sect);
 982                                 flash_write_cmd (info, sect, 0,
 983                                                  AMD_CMD_ERASE_SECTOR);
 984                                 break;
 985 #ifdef CONFIG_FLASH_CFI_LEGACY
 986                         case CFI_CMDSET_AMD_LEGACY:
 987                                 flash_unlock_seq (info, 0);
 988                                 flash_write_cmd (info, 0, info->addr_unlock1,
 989                                                 AMD_CMD_ERASE_START);
 990                                 flash_unlock_seq (info, 0);
 991                                 flash_write_cmd (info, sect, 0,
 992                                                 AMD_CMD_ERASE_SECTOR);
 993                                 break;
 994 #endif
 995                         default:
 996                                 debug ("Unkown flash vendor %d\n",
 997                                        info->vendor);
 998                                 break;
 999                         }
1000
1001                         if (flash_full_status_check
1002                             (info, sect, info->erase_blk_tout, "erase")) {
1003                                 rcode = 1;
1004                         } else if (flash_verbose)
1005                                 putc ('.');
1006                 }
1007         }
1008
1009         if (flash_verbose)
1010                 puts (" done\n");
1011
1012         return rcode;
1013 }
1014
1015 /*-----------------------------------------------------------------------
1016  */
1017 void flash_print_info (flash_info_t * info)
1018 {
1019         int i;
1020
1021         if (info->flash_id != FLASH_MAN_CFI) {
1022                 puts ("missing or unknown FLASH type\n");
1023                 return;
1024         }
1025
1026         printf ("%s FLASH (%d x %d)",
1027                 info->name,
1028                 (info->portwidth << 3), (info->chipwidth << 3));
1029         if (info->size < 1024*1024)
1030                 printf ("  Size: %ld kB in %d Sectors\n",
1031                         info->size >> 10, info->sector_count);
1032         else
1033                 printf ("  Size: %ld MB in %d Sectors\n",
1034                         info->size >> 20, info->sector_count);
1035         printf ("  ");
1036         switch (info->vendor) {
1037                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1038                         printf ("Intel Prog Regions");
1039                         break;
1040                 case CFI_CMDSET_INTEL_STANDARD:
1041                         printf ("Intel Standard");
1042                         break;
1043                 case CFI_CMDSET_INTEL_EXTENDED:
1044                         printf ("Intel Extended");
1045                         break;
1046                 case CFI_CMDSET_AMD_STANDARD:
1047                         printf ("AMD Standard");
1048                         break;
1049                 case CFI_CMDSET_AMD_EXTENDED:
1050                         printf ("AMD Extended");
1051                         break;
1052 #ifdef CONFIG_FLASH_CFI_LEGACY
1053                 case CFI_CMDSET_AMD_LEGACY:
1054                         printf ("AMD Legacy");
1055                         break;
1056 #endif
1057                 default:
1058                         printf ("Unknown (%d)", info->vendor);
1059                         break;
1060         }
1061         printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x%02X",
1062                 info->manufacturer_id, info->device_id);
1063         if (info->device_id == 0x7E) {
1064                 printf("%04X", info->device_id2);
1065         }
1066         printf ("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
1067                 info->erase_blk_tout,
1068                 info->write_tout);
1069         if (info->buffer_size > 1) {
1070                 printf ("  Buffer write timeout: %ld ms, "
1071                         "buffer size: %d bytes\n",
1072                 info->buffer_write_tout,
1073                 info->buffer_size);
1074         }
1075
1076         puts ("\n  Sector Start Addresses:");
1077         for (i = 0; i < info->sector_count; ++i) {
1078                 if ((i % 5) == 0)
1079                         printf ("\n");
1080 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1081                 int k;
1082                 int size;
1083                 int erased;
1084                 volatile unsigned long *flash;
1085
1086                 /*
1087                  * Check if whole sector is erased
1088                  */
1089                 size = flash_sector_size(info, i);
1090                 erased = 1;
1091                 flash = (volatile unsigned long *) info->start[i];
1092                 size = size >> 2;       /* divide by 4 for longword access */
1093                 for (k = 0; k < size; k++) {
1094                         if (*flash++ != 0xffffffff) {
1095                                 erased = 0;
1096                                 break;
1097                         }
1098                 }
1099
1100                 /* print empty and read-only info */
1101                 printf ("  %08lX %c %s ",
1102                         info->start[i],
1103                         erased ? 'E' : ' ',
1104                         info->protect[i] ? "RO" : "  ");
1105 #else   /* ! CONFIG_SYS_FLASH_EMPTY_INFO */
1106                 printf ("  %08lX   %s ",
1107                         info->start[i],
1108                         info->protect[i] ? "RO" : "  ");
1109 #endif
1110         }
1111         putc ('\n');
1112         return;
1113 }
1114
1115 /*-----------------------------------------------------------------------
1116  * This is used in a few places in write_buf() to show programming
1117  * progress.  Making it a function is nasty because it needs to do side
1118  * effect updates to digit and dots.  Repeated code is nasty too, so
1119  * we define it once here.
1120  */
1121 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1122 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub) \
1123         if (flash_verbose) { \
1124                 dots -= dots_sub; \
1125                 if ((scale > 0) && (dots <= 0)) { \
1126                         if ((digit % 5) == 0) \
1127                                 printf ("%d", digit / 5); \
1128                         else \
1129                                 putc ('.'); \
1130                         digit--; \
1131                         dots += scale; \
1132                 } \
1133         }
1134 #else
1135 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub)
1136 #endif
1137
1138 /*-----------------------------------------------------------------------
1139  * Copy memory to flash, returns:
1140  * 0 - OK
1141  * 1 - write timeout
1142  * 2 - Flash not erased
1143  */
1144 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
1145 {
1146         ulong wp;
1147         uchar *p;
1148         int aln;
1149         cfiword_t cword;
1150         int i, rc;
1151 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1152         int buffered_size;
1153 #endif
1154 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1155         int digit = CONFIG_FLASH_SHOW_PROGRESS;
1156         int scale = 0;
1157         int dots  = 0;
1158
1159         /*
1160          * Suppress if there are fewer than CONFIG_FLASH_SHOW_PROGRESS writes.
1161          */
1162         if (cnt >= CONFIG_FLASH_SHOW_PROGRESS) {
1163                 scale = (int)((cnt + CONFIG_FLASH_SHOW_PROGRESS - 1) /
1164                         CONFIG_FLASH_SHOW_PROGRESS);
1165         }
1166 #endif
1167
1168         /* get lower aligned address */
1169         wp = (addr & ~(info->portwidth - 1));
1170
1171         /* handle unaligned start */
1172         if ((aln = addr - wp) != 0) {
1173                 cword.l = 0;
1174                 p = (uchar *)wp;
1175                 for (i = 0; i < aln; ++i)
1176                         flash_add_byte (info, &cword, flash_read8(p + i));
1177
1178                 for (; (i < info->portwidth) && (cnt > 0); i++) {
1179                         flash_add_byte (info, &cword, *src++);
1180                         cnt--;
1181                 }
1182                 for (; (cnt == 0) && (i < info->portwidth); ++i)
1183                         flash_add_byte (info, &cword, flash_read8(p + i));
1184
1185                 rc = flash_write_cfiword (info, wp, cword);
1186                 if (rc != 0)
1187                         return rc;
1188
1189                 wp += i;
1190                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1191         }
1192
1193         /* handle the aligned part */
1194 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1195         buffered_size = (info->portwidth / info->chipwidth);
1196         buffered_size *= info->buffer_size;
1197         while (cnt >= info->portwidth) {
1198                 /* prohibit buffer write when buffer_size is 1 */
1199                 if (info->buffer_size == 1) {
1200                         cword.l = 0;
1201                         for (i = 0; i < info->portwidth; i++)
1202                                 flash_add_byte (info, &cword, *src++);
1203                         if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1204                                 return rc;
1205                         wp += info->portwidth;
1206                         cnt -= info->portwidth;
1207                         continue;
1208                 }
1209
1210                 /* write buffer until next buffered_size aligned boundary */
1211                 i = buffered_size - (wp % buffered_size);
1212                 if (i > cnt)
1213                         i = cnt;
1214                 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
1215                         return rc;
1216                 i -= i & (info->portwidth - 1);
1217                 wp += i;
1218                 src += i;
1219                 cnt -= i;
1220                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1221         }
1222 #else
1223         while (cnt >= info->portwidth) {
1224                 cword.l = 0;
1225                 for (i = 0; i < info->portwidth; i++) {
1226                         flash_add_byte (info, &cword, *src++);
1227                 }
1228                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1229                         return rc;
1230                 wp += info->portwidth;
1231                 cnt -= info->portwidth;
1232                 FLASH_SHOW_PROGRESS(scale, dots, digit, info->portwidth);
1233         }
1234 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1235
1236         if (cnt == 0) {
1237                 return (0);
1238         }
1239
1240         /*
1241          * handle unaligned tail bytes
1242          */
1243         cword.l = 0;
1244         p = (uchar *)wp;
1245         for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
1246                 flash_add_byte (info, &cword, *src++);
1247                 --cnt;
1248         }
1249         for (; i < info->portwidth; ++i)
1250                 flash_add_byte (info, &cword, flash_read8(p + i));
1251
1252         return flash_write_cfiword (info, wp, cword);
1253 }
1254
1255 /*-----------------------------------------------------------------------
1256  */
1257 #ifdef CONFIG_SYS_FLASH_PROTECTION
1258
1259 int flash_real_protect (flash_info_t * info, long sector, int prot)
1260 {
1261         int retcode = 0;
1262
1263         switch (info->vendor) {
1264                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1265                 case CFI_CMDSET_INTEL_STANDARD:
1266                 case CFI_CMDSET_INTEL_EXTENDED:
1267                         flash_write_cmd (info, sector, 0,
1268                                          FLASH_CMD_CLEAR_STATUS);
1269                         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
1270                         if (prot)
1271                                 flash_write_cmd (info, sector, 0,
1272                                         FLASH_CMD_PROTECT_SET);
1273                         else
1274                                 flash_write_cmd (info, sector, 0,
1275                                         FLASH_CMD_PROTECT_CLEAR);
1276                         break;
1277                 case CFI_CMDSET_AMD_EXTENDED:
1278                 case CFI_CMDSET_AMD_STANDARD:
1279                         /* U-Boot only checks the first byte */
1280                         if (info->manufacturer_id == (uchar)ATM_MANUFACT) {
1281                                 if (prot) {
1282                                         flash_unlock_seq (info, 0);
1283                                         flash_write_cmd (info, 0,
1284                                                         info->addr_unlock1,
1285                                                         ATM_CMD_SOFTLOCK_START);
1286                                         flash_unlock_seq (info, 0);
1287                                         flash_write_cmd (info, sector, 0,
1288                                                         ATM_CMD_LOCK_SECT);
1289                                 } else {
1290                                         flash_write_cmd (info, 0,
1291                                                         info->addr_unlock1,
1292                                                         AMD_CMD_UNLOCK_START);
1293                                         if (info->device_id == ATM_ID_BV6416)
1294                                                 flash_write_cmd (info, sector,
1295                                                         0, ATM_CMD_UNLOCK_SECT);
1296                                 }
1297                         }
1298                         break;
1299 #ifdef CONFIG_FLASH_CFI_LEGACY
1300                 case CFI_CMDSET_AMD_LEGACY:
1301                         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1302                         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
1303                         if (prot)
1304                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
1305                         else
1306                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
1307 #endif
1308         };
1309
1310         if ((retcode =
1311              flash_full_status_check (info, sector, info->erase_blk_tout,
1312                                       prot ? "protect" : "unprotect")) == 0) {
1313
1314                 info->protect[sector] = prot;
1315
1316                 /*
1317                  * On some of Intel's flash chips (marked via legacy_unlock)
1318                  * unprotect unprotects all locking.
1319                  */
1320                 if ((prot == 0) && (info->legacy_unlock)) {
1321                         flash_sect_t i;
1322
1323                         for (i = 0; i < info->sector_count; i++) {
1324                                 if (info->protect[i])
1325                                         flash_real_protect (info, i, 1);
1326                         }
1327                 }
1328         }
1329         return retcode;
1330 }
1331
1332 /*-----------------------------------------------------------------------
1333  * flash_read_user_serial - read the OneTimeProgramming cells
1334  */
1335 void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
1336                              int len)
1337 {
1338         uchar *src;
1339         uchar *dst;
1340
1341         dst = buffer;
1342         src = flash_map (info, 0, FLASH_OFFSET_USER_PROTECTION);
1343         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1344         memcpy (dst, src + offset, len);
1345         flash_write_cmd (info, 0, 0, info->cmd_reset);
1346         flash_unmap(info, 0, FLASH_OFFSET_USER_PROTECTION, src);
1347 }
1348
1349 /*
1350  * flash_read_factory_serial - read the device Id from the protection area
1351  */
1352 void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
1353                                 int len)
1354 {
1355         uchar *src;
1356
1357         src = flash_map (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
1358         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1359         memcpy (buffer, src + offset, len);
1360         flash_write_cmd (info, 0, 0, info->cmd_reset);
1361         flash_unmap(info, 0, FLASH_OFFSET_INTEL_PROTECTION, src);
1362 }
1363
1364 #endif /* CONFIG_SYS_FLASH_PROTECTION */
1365
1366 /*-----------------------------------------------------------------------
1367  * Reverse the order of the erase regions in the CFI QRY structure.
1368  * This is needed for chips that are either a) correctly detected as
1369  * top-boot, or b) buggy.
1370  */
1371 static void cfi_reverse_geometry(struct cfi_qry *qry)
1372 {
1373         unsigned int i, j;
1374         u32 tmp;
1375
1376         for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) {
1377                 tmp = qry->erase_region_info[i];
1378                 qry->erase_region_info[i] = qry->erase_region_info[j];
1379                 qry->erase_region_info[j] = tmp;
1380         }
1381 }
1382
1383 /*-----------------------------------------------------------------------
1384  * read jedec ids from device and set corresponding fields in info struct
1385  *
1386  * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
1387  *
1388  */
1389 static void cmdset_intel_read_jedec_ids(flash_info_t *info)
1390 {
1391         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1392         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1393         udelay(1000); /* some flash are slow to respond */
1394         info->manufacturer_id = flash_read_uchar (info,
1395                                         FLASH_OFFSET_MANUFACTURER_ID);
1396         info->device_id = flash_read_uchar (info,
1397                                         FLASH_OFFSET_DEVICE_ID);
1398         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1399 }
1400
1401 static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry)
1402 {
1403         info->cmd_reset = FLASH_CMD_RESET;
1404
1405         cmdset_intel_read_jedec_ids(info);
1406         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1407
1408 #ifdef CONFIG_SYS_FLASH_PROTECTION
1409         /* read legacy lock/unlock bit from intel flash */
1410         if (info->ext_addr) {
1411                 info->legacy_unlock = flash_read_uchar (info,
1412                                 info->ext_addr + 5) & 0x08;
1413         }
1414 #endif
1415
1416         return 0;
1417 }
1418
1419 static void cmdset_amd_read_jedec_ids(flash_info_t *info)
1420 {
1421         ushort bankId = 0;
1422         uchar  manuId;
1423
1424         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1425         flash_unlock_seq(info, 0);
1426         flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
1427         udelay(1000); /* some flash are slow to respond */
1428
1429         manuId = flash_read_uchar (info, FLASH_OFFSET_MANUFACTURER_ID);
1430         /* JEDEC JEP106Z specifies ID codes up to bank 7 */
1431         while (manuId == FLASH_CONTINUATION_CODE && bankId < 0x800) {
1432                 bankId += 0x100;
1433                 manuId = flash_read_uchar (info,
1434                         bankId | FLASH_OFFSET_MANUFACTURER_ID);
1435         }
1436         info->manufacturer_id = manuId;
1437
1438         switch (info->chipwidth){
1439         case FLASH_CFI_8BIT:
1440                 info->device_id = flash_read_uchar (info,
1441                                                 FLASH_OFFSET_DEVICE_ID);
1442                 if (info->device_id == 0x7E) {
1443                         /* AMD 3-byte (expanded) device ids */
1444                         info->device_id2 = flash_read_uchar (info,
1445                                                 FLASH_OFFSET_DEVICE_ID2);
1446                         info->device_id2 <<= 8;
1447                         info->device_id2 |= flash_read_uchar (info,
1448                                                 FLASH_OFFSET_DEVICE_ID3);
1449                 }
1450                 break;
1451         case FLASH_CFI_16BIT:
1452                 info->device_id = flash_read_word (info,
1453                                                 FLASH_OFFSET_DEVICE_ID);
1454                 break;
1455         default:
1456                 break;
1457         }
1458         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1459 }
1460
1461 static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry)
1462 {
1463         info->cmd_reset = AMD_CMD_RESET;
1464
1465         cmdset_amd_read_jedec_ids(info);
1466         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1467
1468         return 0;
1469 }
1470
1471 #ifdef CONFIG_FLASH_CFI_LEGACY
1472 static void flash_read_jedec_ids (flash_info_t * info)
1473 {
1474         info->manufacturer_id = 0;
1475         info->device_id       = 0;
1476         info->device_id2      = 0;
1477
1478         switch (info->vendor) {
1479         case CFI_CMDSET_INTEL_PROG_REGIONS:
1480         case CFI_CMDSET_INTEL_STANDARD:
1481         case CFI_CMDSET_INTEL_EXTENDED:
1482                 cmdset_intel_read_jedec_ids(info);
1483                 break;
1484         case CFI_CMDSET_AMD_STANDARD:
1485         case CFI_CMDSET_AMD_EXTENDED:
1486                 cmdset_amd_read_jedec_ids(info);
1487                 break;
1488         default:
1489                 break;
1490         }
1491 }
1492
1493 /*-----------------------------------------------------------------------
1494  * Call board code to request info about non-CFI flash.
1495  * board_flash_get_legacy needs to fill in at least:
1496  * info->portwidth, info->chipwidth and info->interface for Jedec probing.
1497  */
1498 static int flash_detect_legacy(phys_addr_t base, int banknum)
1499 {
1500         flash_info_t *info = &flash_info[banknum];
1501
1502         if (board_flash_get_legacy(base, banknum, info)) {
1503                 /* board code may have filled info completely. If not, we
1504                    use JEDEC ID probing. */
1505                 if (!info->vendor) {
1506                         int modes[] = {
1507                                 CFI_CMDSET_AMD_STANDARD,
1508                                 CFI_CMDSET_INTEL_STANDARD
1509                         };
1510                         int i;
1511
1512                         for (i = 0; i < sizeof(modes) / sizeof(modes[0]); i++) {
1513                                 info->vendor = modes[i];
1514                                 info->start[0] =
1515                                         (ulong)map_physmem(base,
1516                                                            info->portwidth,
1517                                                            MAP_NOCACHE);
1518                                 if (info->portwidth == FLASH_CFI_8BIT
1519                                         && info->interface == FLASH_CFI_X8X16) {
1520                                         info->addr_unlock1 = 0x2AAA;
1521                                         info->addr_unlock2 = 0x5555;
1522                                 } else {
1523                                         info->addr_unlock1 = 0x5555;
1524                                         info->addr_unlock2 = 0x2AAA;
1525                                 }
1526                                 flash_read_jedec_ids(info);
1527                                 debug("JEDEC PROBE: ID %x %x %x\n",
1528                                                 info->manufacturer_id,
1529                                                 info->device_id,
1530                                                 info->device_id2);
1531                                 if (jedec_flash_match(info, info->start[0]))
1532                                         break;
1533                                 else
1534                                         unmap_physmem((void *)info->start[0],
1535                                                       MAP_NOCACHE);
1536                         }
1537                 }
1538
1539                 switch(info->vendor) {
1540                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1541                 case CFI_CMDSET_INTEL_STANDARD:
1542                 case CFI_CMDSET_INTEL_EXTENDED:
1543                         info->cmd_reset = FLASH_CMD_RESET;
1544                         break;
1545                 case CFI_CMDSET_AMD_STANDARD:
1546                 case CFI_CMDSET_AMD_EXTENDED:
1547                 case CFI_CMDSET_AMD_LEGACY:
1548                         info->cmd_reset = AMD_CMD_RESET;
1549                         break;
1550                 }
1551                 info->flash_id = FLASH_MAN_CFI;
1552                 return 1;
1553         }
1554         return 0; /* use CFI */
1555 }
1556 #else
1557 static inline int flash_detect_legacy(phys_addr_t base, int banknum)
1558 {
1559         return 0; /* use CFI */
1560 }
1561 #endif
1562
1563 /*-----------------------------------------------------------------------
1564  * detect if flash is compatible with the Common Flash Interface (CFI)
1565  * http://www.jedec.org/download/search/jesd68.pdf
1566  */
1567 static void flash_read_cfi (flash_info_t *info, void *buf,
1568                 unsigned int start, size_t len)
1569 {
1570         u8 *p = buf;
1571         unsigned int i;
1572
1573         for (i = 0; i < len; i++)
1574                 p[i] = flash_read_uchar(info, start + i);
1575 }
1576
1577 void __flash_cmd_reset(flash_info_t *info)
1578 {
1579         /*
1580          * We do not yet know what kind of commandset to use, so we issue
1581          * the reset command in both Intel and AMD variants, in the hope
1582          * that AMD flash roms ignore the Intel command.
1583          */
1584         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1585         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1586 }
1587 void flash_cmd_reset(flash_info_t *info)
1588         __attribute__((weak,alias("__flash_cmd_reset")));
1589
1590 static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1591 {
1592         int cfi_offset;
1593
1594         /* Issue FLASH reset command */
1595         flash_cmd_reset(info);
1596
1597         for (cfi_offset=0;
1598              cfi_offset < sizeof(flash_offset_cfi) / sizeof(uint);
1599              cfi_offset++) {
1600                 flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset],
1601                                  FLASH_CMD_CFI);
1602                 if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
1603                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
1604                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
1605                         flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
1606                                         sizeof(struct cfi_qry));
1607                         info->interface = le16_to_cpu(qry->interface_desc);
1608
1609                         info->cfi_offset = flash_offset_cfi[cfi_offset];
1610                         debug ("device interface is %d\n",
1611                                info->interface);
1612                         debug ("found port %d chip %d ",
1613                                info->portwidth, info->chipwidth);
1614                         debug ("port %d bits chip %d bits\n",
1615                                info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1616                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1617
1618                         /* calculate command offsets as in the Linux driver */
1619                         info->addr_unlock1 = 0x555;
1620                         info->addr_unlock2 = 0x2aa;
1621
1622                         /*
1623                          * modify the unlock address if we are
1624                          * in compatibility mode
1625                          */
1626                         if (    /* x8/x16 in x8 mode */
1627                                 ((info->chipwidth == FLASH_CFI_BY8) &&
1628                                         (info->interface == FLASH_CFI_X8X16)) ||
1629                                 /* x16/x32 in x16 mode */
1630                                 ((info->chipwidth == FLASH_CFI_BY16) &&
1631                                         (info->interface == FLASH_CFI_X16X32)))
1632                         {
1633                                 info->addr_unlock1 = 0xaaa;
1634                                 info->addr_unlock2 = 0x555;
1635                         }
1636
1637                         info->name = "CFI conformant";
1638                         return 1;
1639                 }
1640         }
1641
1642         return 0;
1643 }
1644
1645 static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1646 {
1647         debug ("flash detect cfi\n");
1648
1649         for (info->portwidth = CONFIG_SYS_FLASH_CFI_WIDTH;
1650              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
1651                 for (info->chipwidth = FLASH_CFI_BY8;
1652                      info->chipwidth <= info->portwidth;
1653                      info->chipwidth <<= 1)
1654                         if (__flash_detect_cfi(info, qry))
1655                                 return 1;
1656         }
1657         debug ("not found\n");
1658         return 0;
1659 }
1660
1661 /*
1662  * Manufacturer-specific quirks. Add workarounds for geometry
1663  * reversal, etc. here.
1664  */
1665 static void flash_fixup_amd(flash_info_t *info, struct cfi_qry *qry)
1666 {
1667         /* check if flash geometry needs reversal */
1668         if (qry->num_erase_regions > 1) {
1669                 /* reverse geometry if top boot part */
1670                 if (info->cfi_version < 0x3131) {
1671                         /* CFI < 1.1, try to guess from device id */
1672                         if ((info->device_id & 0x80) != 0)
1673                                 cfi_reverse_geometry(qry);
1674                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
1675                         /* CFI >= 1.1, deduct from top/bottom flag */
1676                         /* note: ext_addr is valid since cfi_version > 0 */
1677                         cfi_reverse_geometry(qry);
1678                 }
1679         }
1680 }
1681
1682 static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
1683 {
1684         int reverse_geometry = 0;
1685
1686         /* Check the "top boot" bit in the PRI */
1687         if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1))
1688                 reverse_geometry = 1;
1689
1690         /* AT49BV6416(T) list the erase regions in the wrong order.
1691          * However, the device ID is identical with the non-broken
1692          * AT49BV642D they differ in the high byte.
1693          */
1694         if (info->device_id == 0xd6 || info->device_id == 0xd2)
1695                 reverse_geometry = !reverse_geometry;
1696
1697         if (reverse_geometry)
1698                 cfi_reverse_geometry(qry);
1699 }
1700
1701 static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
1702 {
1703         /* check if flash geometry needs reversal */
1704         if (qry->num_erase_regions > 1) {
1705                 /* reverse geometry if top boot part */
1706                 if (info->cfi_version < 0x3131) {
1707                         /* CFI < 1.1, guess by device id (M29W320{DT,ET} only) */
1708                         if (info->device_id == 0x22CA ||
1709                             info->device_id == 0x2256) {
1710                                 cfi_reverse_geometry(qry);
1711                         }
1712                 }
1713         }
1714 }
1715
1716 /*
1717  * The following code cannot be run from FLASH!
1718  *
1719  */
1720 ulong flash_get_size (phys_addr_t base, int banknum)
1721 {
1722         flash_info_t *info = &flash_info[banknum];
1723         int i, j;
1724         flash_sect_t sect_cnt;
1725         phys_addr_t sector;
1726         unsigned long tmp;
1727         int size_ratio;
1728         uchar num_erase_regions;
1729         int erase_region_size;
1730         int erase_region_count;
1731         struct cfi_qry qry;
1732
1733         memset(&qry, 0, sizeof(qry));
1734
1735         info->ext_addr = 0;
1736         info->cfi_version = 0;
1737 #ifdef CONFIG_SYS_FLASH_PROTECTION
1738         info->legacy_unlock = 0;
1739 #endif
1740
1741         info->start[0] = (ulong)map_physmem(base, info->portwidth, MAP_NOCACHE);
1742
1743         if (flash_detect_cfi (info, &qry)) {
1744                 info->vendor = le16_to_cpu(qry.p_id);
1745                 info->ext_addr = le16_to_cpu(qry.p_adr);
1746                 num_erase_regions = qry.num_erase_regions;
1747
1748                 if (info->ext_addr) {
1749                         info->cfi_version = (ushort) flash_read_uchar (info,
1750                                                 info->ext_addr + 3) << 8;
1751                         info->cfi_version |= (ushort) flash_read_uchar (info,
1752                                                 info->ext_addr + 4);
1753                 }
1754
1755 #ifdef DEBUG
1756                 flash_printqry (&qry);
1757 #endif
1758
1759                 switch (info->vendor) {
1760                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1761                 case CFI_CMDSET_INTEL_STANDARD:
1762                 case CFI_CMDSET_INTEL_EXTENDED:
1763                         cmdset_intel_init(info, &qry);
1764                         break;
1765                 case CFI_CMDSET_AMD_STANDARD:
1766                 case CFI_CMDSET_AMD_EXTENDED:
1767                         cmdset_amd_init(info, &qry);
1768                         break;
1769                 default:
1770                         printf("CFI: Unknown command set 0x%x\n",
1771                                         info->vendor);
1772                         /*
1773                          * Unfortunately, this means we don't know how
1774                          * to get the chip back to Read mode. Might
1775                          * as well try an Intel-style reset...
1776                          */
1777                         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1778                         return 0;
1779                 }
1780
1781                 /* Do manufacturer-specific fixups */
1782                 switch (info->manufacturer_id) {
1783                 case 0x0001:
1784                         flash_fixup_amd(info, &qry);
1785                         break;
1786                 case 0x001f:
1787                         flash_fixup_atmel(info, &qry);
1788                         break;
1789                 case 0x0020:
1790                         flash_fixup_stm(info, &qry);
1791                         break;
1792                 }
1793
1794                 debug ("manufacturer is %d\n", info->vendor);
1795                 debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
1796                 debug ("device id is 0x%x\n", info->device_id);
1797                 debug ("device id2 is 0x%x\n", info->device_id2);
1798                 debug ("cfi version is 0x%04x\n", info->cfi_version);
1799
1800                 size_ratio = info->portwidth / info->chipwidth;
1801                 /* if the chip is x8/x16 reduce the ratio by half */
1802                 if ((info->interface == FLASH_CFI_X8X16)
1803                     && (info->chipwidth == FLASH_CFI_BY8)) {
1804                         size_ratio >>= 1;
1805                 }
1806                 debug ("size_ratio %d port %d bits chip %d bits\n",
1807                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1808                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1809                 debug ("found %d erase regions\n", num_erase_regions);
1810                 sect_cnt = 0;
1811                 sector = base;
1812                 for (i = 0; i < num_erase_regions; i++) {
1813                         if (i > NUM_ERASE_REGIONS) {
1814                                 printf ("%d erase regions found, only %d used\n",
1815                                         num_erase_regions, NUM_ERASE_REGIONS);
1816                                 break;
1817                         }
1818
1819                         tmp = le32_to_cpu(qry.erase_region_info[i]);
1820                         debug("erase region %u: 0x%08lx\n", i, tmp);
1821
1822                         erase_region_count = (tmp & 0xffff) + 1;
1823                         tmp >>= 16;
1824                         erase_region_size =
1825                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
1826                         debug ("erase_region_count = %d erase_region_size = %d\n",
1827                                 erase_region_count, erase_region_size);
1828                         for (j = 0; j < erase_region_count; j++) {
1829                                 if (sect_cnt >= CONFIG_SYS_MAX_FLASH_SECT) {
1830                                         printf("ERROR: too many flash sectors\n");
1831                                         break;
1832                                 }
1833                                 info->start[sect_cnt] =
1834                                         (ulong)map_physmem(sector,
1835                                                            info->portwidth,
1836                                                            MAP_NOCACHE);
1837                                 sector += (erase_region_size * size_ratio);
1838
1839                                 /*
1840                                  * Only read protection status from
1841                                  * supported devices (intel...)
1842                                  */
1843                                 switch (info->vendor) {
1844                                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1845                                 case CFI_CMDSET_INTEL_EXTENDED:
1846                                 case CFI_CMDSET_INTEL_STANDARD:
1847                                         info->protect[sect_cnt] =
1848                                                 flash_isset (info, sect_cnt,
1849                                                              FLASH_OFFSET_PROTECT,
1850                                                              FLASH_STATUS_PROTECT);
1851                                         break;
1852                                 default:
1853                                         /* default: not protected */
1854                                         info->protect[sect_cnt] = 0;
1855                                 }
1856
1857                                 sect_cnt++;
1858                         }
1859                 }
1860
1861                 info->sector_count = sect_cnt;
1862                 info->size = 1 << qry.dev_size;
1863                 /* multiply the size by the number of chips */
1864                 info->size *= size_ratio;
1865                 info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
1866                 tmp = 1 << qry.block_erase_timeout_typ;
1867                 info->erase_blk_tout = tmp *
1868                         (1 << qry.block_erase_timeout_max);
1869                 tmp = (1 << qry.buf_write_timeout_typ) *
1870                         (1 << qry.buf_write_timeout_max);
1871
1872                 /* round up when converting to ms */
1873                 info->buffer_write_tout = (tmp + 999) / 1000;
1874                 tmp = (1 << qry.word_write_timeout_typ) *
1875                         (1 << qry.word_write_timeout_max);
1876                 /* round up when converting to ms */
1877                 info->write_tout = (tmp + 999) / 1000;
1878                 info->flash_id = FLASH_MAN_CFI;
1879                 if ((info->interface == FLASH_CFI_X8X16) &&
1880                     (info->chipwidth == FLASH_CFI_BY8)) {
1881                         /* XXX - Need to test on x8/x16 in parallel. */
1882                         info->portwidth >>= 1;
1883                 }
1884
1885                 flash_write_cmd (info, 0, 0, info->cmd_reset);
1886         }
1887
1888         return (info->size);
1889 }
1890
1891 void flash_set_verbose(uint v)
1892 {
1893         flash_verbose = v;
1894 }
1895
1896 /*-----------------------------------------------------------------------
1897  */
1898 unsigned long flash_init (void)
1899 {
1900         unsigned long size = 0;
1901         int i;
1902 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
1903         struct apl_s {
1904                 ulong start;
1905                 ulong size;
1906         } apl[] = CONFIG_SYS_FLASH_AUTOPROTECT_LIST;
1907 #endif
1908
1909 #ifdef CONFIG_SYS_FLASH_PROTECTION
1910         /* read environment from EEPROM */
1911         char s[64];
1912         getenv_r ("unlock", s, sizeof(s));
1913 #endif
1914
1915 #define BANK_BASE(i)    (((phys_addr_t [CFI_MAX_FLASH_BANKS])CONFIG_SYS_FLASH_BANKS_LIST)[i])
1916
1917         /* Init: no FLASHes known */
1918         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
1919                 flash_info[i].flash_id = FLASH_UNKNOWN;
1920
1921                 if (!flash_detect_legacy (BANK_BASE(i), i))
1922                         flash_get_size (BANK_BASE(i), i);
1923                 size += flash_info[i].size;
1924                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
1925 #ifndef CONFIG_SYS_FLASH_QUIET_TEST
1926                         printf ("## Unknown FLASH on Bank %d "
1927                                 "- Size = 0x%08lx = %ld MB\n",
1928                                 i+1, flash_info[i].size,
1929                                 flash_info[i].size << 20);
1930 #endif /* CONFIG_SYS_FLASH_QUIET_TEST */
1931                 }
1932 #ifdef CONFIG_SYS_FLASH_PROTECTION
1933                 else if ((s != NULL) && (strcmp(s, "yes") == 0)) {
1934                         /*
1935                          * Only the U-Boot image and it's environment
1936                          * is protected, all other sectors are
1937                          * unprotected (unlocked) if flash hardware
1938                          * protection is used (CONFIG_SYS_FLASH_PROTECTION)
1939                          * and the environment variable "unlock" is
1940                          * set to "yes".
1941                          */
1942                         if (flash_info[i].legacy_unlock) {
1943                                 int k;
1944
1945                                 /*
1946                                  * Disable legacy_unlock temporarily,
1947                                  * since flash_real_protect would
1948                                  * relock all other sectors again
1949                                  * otherwise.
1950                                  */
1951                                 flash_info[i].legacy_unlock = 0;
1952
1953                                 /*
1954                                  * Legacy unlocking (e.g. Intel J3) ->
1955                                  * unlock only one sector. This will
1956                                  * unlock all sectors.
1957                                  */
1958                                 flash_real_protect (&flash_info[i], 0, 0);
1959
1960                                 flash_info[i].legacy_unlock = 1;
1961
1962                                 /*
1963                                  * Manually mark other sectors as
1964                                  * unlocked (unprotected)
1965                                  */
1966                                 for (k = 1; k < flash_info[i].sector_count; k++)
1967                                         flash_info[i].protect[k] = 0;
1968                         } else {
1969                                 /*
1970                                  * No legancy unlocking -> unlock all sectors
1971                                  */
1972                                 flash_protect (FLAG_PROTECT_CLEAR,
1973                                                flash_info[i].start[0],
1974                                                flash_info[i].start[0]
1975                                                + flash_info[i].size - 1,
1976                                                &flash_info[i]);
1977                         }
1978                 }
1979 #endif /* CONFIG_SYS_FLASH_PROTECTION */
1980         }
1981
1982         /* Monitor protection ON by default */
1983 #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
1984         flash_protect (FLAG_PROTECT_SET,
1985                        CONFIG_SYS_MONITOR_BASE,
1986                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len  - 1,
1987                        flash_get_info(CONFIG_SYS_MONITOR_BASE));
1988 #endif
1989
1990         /* Environment protection ON by default */
1991 #ifdef CONFIG_ENV_IS_IN_FLASH
1992         flash_protect (FLAG_PROTECT_SET,
1993                        CONFIG_ENV_ADDR,
1994                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
1995                        flash_get_info(CONFIG_ENV_ADDR));
1996 #endif
1997
1998         /* Redundant environment protection ON by default */
1999 #ifdef CONFIG_ENV_ADDR_REDUND
2000         flash_protect (FLAG_PROTECT_SET,
2001                        CONFIG_ENV_ADDR_REDUND,
2002                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
2003                        flash_get_info(CONFIG_ENV_ADDR_REDUND));
2004 #endif
2005
2006 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2007         for (i = 0; i < (sizeof(apl) / sizeof(struct apl_s)); i++) {
2008                 debug("autoprotecting from %08x to %08x\n",
2009                       apl[i].start, apl[i].start + apl[i].size - 1);
2010                 flash_protect (FLAG_PROTECT_SET,
2011                                apl[i].start,
2012                                apl[i].start + apl[i].size - 1,
2013                                flash_get_info(apl[i].start));
2014         }
2015 #endif
2016
2017 #ifdef CONFIG_FLASH_CFI_MTD
2018         cfi_mtd_init();
2019 #endif
2020
2021         return (size);
2022 }