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 static uint flash_offset_cfi[2] = { FLASH_OFFSET_CFI, FLASH_OFFSET_CFI_ALT };
  66 #ifdef CONFIG_FLASH_CFI_MTD
  67 static uint flash_verbose = 1;
  68 #else
  69 #define flash_verbose 1
  70 #endif
  71
  72 flash_info_t flash_info[CFI_MAX_FLASH_BANKS];   /* FLASH chips info */
  73
  74 /*
  75  * Check if chip width is defined. If not, start detecting with 8bit.
  76  */
  77 #ifndef CONFIG_SYS_FLASH_CFI_WIDTH
  78 #define CONFIG_SYS_FLASH_CFI_WIDTH      FLASH_CFI_8BIT
  79 #endif
  80
  81 /*
  82  * 0xffff is an undefined value for the configuration register. When
  83  * this value is returned, the configuration register shall not be
  84  * written at all (default mode).
  85  */
  86 static u16 cfi_flash_config_reg(int i)
  87 {
  88 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
  89         return ((u16 [])CONFIG_SYS_CFI_FLASH_CONFIG_REGS)[i];
  90 #else
  91         return 0xffff;
  92 #endif
  93 }
  94
  95 #if defined(CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
  96 int cfi_flash_num_flash_banks = CONFIG_SYS_MAX_FLASH_BANKS_DETECT;
  97 #endif
  98
  99 static phys_addr_t __cfi_flash_bank_addr(int i)
 100 {
 101         return ((phys_addr_t [])CONFIG_SYS_FLASH_BANKS_LIST)[i];
 102 }
 103 phys_addr_t cfi_flash_bank_addr(int i)
 104         __attribute__((weak, alias("__cfi_flash_bank_addr")));
 105
 106 static unsigned long __cfi_flash_bank_size(int i)
 107 {
 108 #ifdef CONFIG_SYS_FLASH_BANKS_SIZES
 109         return ((unsigned long [])CONFIG_SYS_FLASH_BANKS_SIZES)[i];
 110 #else
 111         return 0;
 112 #endif
 113 }
 114 unsigned long cfi_flash_bank_size(int i)
 115         __attribute__((weak, alias("__cfi_flash_bank_size")));
 116
 117 static void __flash_write8(u8 value, void *addr)
 118 {
 119         __raw_writeb(value, addr);
 120 }
 121
 122 static void __flash_write16(u16 value, void *addr)
 123 {
 124         __raw_writew(value, addr);
 125 }
 126
 127 static void __flash_write32(u32 value, void *addr)
 128 {
 129         __raw_writel(value, addr);
 130 }
 131
 132 static void __flash_write64(u64 value, void *addr)
 133 {
 134         /* No architectures currently implement __raw_writeq() */
 135         *(volatile u64 *)addr = value;
 136 }
 137
 138 static u8 __flash_read8(void *addr)
 139 {
 140         return __raw_readb(addr);
 141 }
 142
 143 static u16 __flash_read16(void *addr)
 144 {
 145         return __raw_readw(addr);
 146 }
 147
 148 static u32 __flash_read32(void *addr)
 149 {
 150         return __raw_readl(addr);
 151 }
 152
 153 static u64 __flash_read64(void *addr)
 154 {
 155         /* No architectures currently implement __raw_readq() */
 156         return *(volatile u64 *)addr;
 157 }
 158
 159 #ifdef CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS
 160 void flash_write8(u8 value, void *addr)__attribute__((weak, alias("__flash_write8")));
 161 void flash_write16(u16 value, void *addr)__attribute__((weak, alias("__flash_write16")));
 162 void flash_write32(u32 value, void *addr)__attribute__((weak, alias("__flash_write32")));
 163 void flash_write64(u64 value, void *addr)__attribute__((weak, alias("__flash_write64")));
 164 u8 flash_read8(void *addr)__attribute__((weak, alias("__flash_read8")));
 165 u16 flash_read16(void *addr)__attribute__((weak, alias("__flash_read16")));
 166 u32 flash_read32(void *addr)__attribute__((weak, alias("__flash_read32")));
 167 u64 flash_read64(void *addr)__attribute__((weak, alias("__flash_read64")));
 168 #else
 169 #define flash_write8    __flash_write8
 170 #define flash_write16   __flash_write16
 171 #define flash_write32   __flash_write32
 172 #define flash_write64   __flash_write64
 173 #define flash_read8     __flash_read8
 174 #define flash_read16    __flash_read16
 175 #define flash_read32    __flash_read32
 176 #define flash_read64    __flash_read64
 177 #endif
 178
 179 /*-----------------------------------------------------------------------
 180  */
 181 #if defined(CONFIG_ENV_IS_IN_FLASH) || defined(CONFIG_ENV_ADDR_REDUND) || (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
 182 flash_info_t *flash_get_info(ulong base)
 183 {
 184         int i;
 185         flash_info_t *info = NULL;
 186
 187         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 188                 info = & flash_info[i];
 189                 if (info->size && info->start[0] <= base &&
 190                     base <= info->start[0] + info->size - 1)
 191                         break;
 192         }
 193
 194         return info;
 195 }
 196 #endif
 197
 198 unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect)
 199 {
 200         if (sect != (info->sector_count - 1))
 201                 return info->start[sect + 1] - info->start[sect];
 202         else
 203                 return info->start[0] + info->size - info->start[sect];
 204 }
 205
 206 /*-----------------------------------------------------------------------
 207  * create an address based on the offset and the port width
 208  */
 209 static inline void *
 210 flash_map (flash_info_t * info, flash_sect_t sect, uint offset)
 211 {
 212         unsigned int byte_offset = offset * info->portwidth;
 213
 214         return (void *)(info->start[sect] + byte_offset);
 215 }
 216
 217 static inline void flash_unmap(flash_info_t *info, flash_sect_t sect,
 218                 unsigned int offset, void *addr)
 219 {
 220 }
 221
 222 /*-----------------------------------------------------------------------
 223  * make a proper sized command based on the port and chip widths
 224  */
 225 static void flash_make_cmd(flash_info_t *info, u32 cmd, void *cmdbuf)
 226 {
 227         int i;
 228         int cword_offset;
 229         int cp_offset;
 230 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 231         u32 cmd_le = cpu_to_le32(cmd);
 232 #endif
 233         uchar val;
 234         uchar *cp = (uchar *) cmdbuf;
 235
 236         for (i = info->portwidth; i > 0; i--){
 237                 cword_offset = (info->portwidth-i)%info->chipwidth;
 238 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 239                 cp_offset = info->portwidth - i;
 240                 val = *((uchar*)&cmd_le + cword_offset);
 241 #else
 242                 cp_offset = i - 1;
 243                 val = *((uchar*)&cmd + sizeof(u32) - cword_offset - 1);
 244 #endif
 245                 cp[cp_offset] = (cword_offset >= sizeof(u32)) ? 0x00 : val;
 246         }
 247 }
 248
 249 #ifdef DEBUG
 250 /*-----------------------------------------------------------------------
 251  * Debug support
 252  */
 253 static void print_longlong (char *str, unsigned long long data)
 254 {
 255         int i;
 256         char *cp;
 257
 258         cp = (char *) &data;
 259         for (i = 0; i < 8; i++)
 260                 sprintf (&str[i * 2], "%2.2x", *cp++);
 261 }
 262
 263 static void flash_printqry (struct cfi_qry *qry)
 264 {
 265         u8 *p = (u8 *)qry;
 266         int x, y;
 267
 268         for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
 269                 debug("%02x : ", x);
 270                 for (y = 0; y < 16; y++)
 271                         debug("%2.2x ", p[x + y]);
 272                 debug(" ");
 273                 for (y = 0; y < 16; y++) {
 274                         unsigned char c = p[x + y];
 275                         if (c >= 0x20 && c <= 0x7e)
 276                                 debug("%c", c);
 277                         else
 278                                 debug(".");
 279                 }
 280                 debug("\n");
 281         }
 282 }
 283 #endif
 284
 285
 286 /*-----------------------------------------------------------------------
 287  * read a character at a port width address
 288  */
 289 static inline uchar flash_read_uchar (flash_info_t * info, uint offset)
 290 {
 291         uchar *cp;
 292         uchar retval;
 293
 294         cp = flash_map (info, 0, offset);
 295 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 296         retval = flash_read8(cp);
 297 #else
 298         retval = flash_read8(cp + info->portwidth - 1);
 299 #endif
 300         flash_unmap (info, 0, offset, cp);
 301         return retval;
 302 }
 303
 304 /*-----------------------------------------------------------------------
 305  * read a word at a port width address, assume 16bit bus
 306  */
 307 static inline ushort flash_read_word (flash_info_t * info, uint offset)
 308 {
 309         ushort *addr, retval;
 310
 311         addr = flash_map (info, 0, offset);
 312         retval = flash_read16 (addr);
 313         flash_unmap (info, 0, offset, addr);
 314         return retval;
 315 }
 316
 317
 318 /*-----------------------------------------------------------------------
 319  * read a long word by picking the least significant byte of each maximum
 320  * port size word. Swap for ppc format.
 321  */
 322 static ulong flash_read_long (flash_info_t * info, flash_sect_t sect,
 323                               uint offset)
 324 {
 325         uchar *addr;
 326         ulong retval;
 327
 328 #ifdef DEBUG
 329         int x;
 330 #endif
 331         addr = flash_map (info, sect, offset);
 332
 333 #ifdef DEBUG
 334         debug ("long addr is at %p info->portwidth = %d\n", addr,
 335                info->portwidth);
 336         for (x = 0; x < 4 * info->portwidth; x++) {
 337                 debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
 338         }
 339 #endif
 340 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 341         retval = ((flash_read8(addr) << 16) |
 342                   (flash_read8(addr + info->portwidth) << 24) |
 343                   (flash_read8(addr + 2 * info->portwidth)) |
 344                   (flash_read8(addr + 3 * info->portwidth) << 8));
 345 #else
 346         retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) |
 347                   (flash_read8(addr + info->portwidth - 1) << 16) |
 348                   (flash_read8(addr + 4 * info->portwidth - 1) << 8) |
 349                   (flash_read8(addr + 3 * info->portwidth - 1)));
 350 #endif
 351         flash_unmap(info, sect, offset, addr);
 352
 353         return retval;
 354 }
 355
 356 /*
 357  * Write a proper sized command to the correct address
 358  */
 359 void flash_write_cmd (flash_info_t * info, flash_sect_t sect,
 360                       uint offset, u32 cmd)
 361 {
 362
 363         void *addr;
 364         cfiword_t cword;
 365
 366         addr = flash_map (info, sect, offset);
 367         flash_make_cmd (info, cmd, &cword);
 368         switch (info->portwidth) {
 369         case FLASH_CFI_8BIT:
 370                 debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr, cmd,
 371                        cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 372                 flash_write8(cword.c, addr);
 373                 break;
 374         case FLASH_CFI_16BIT:
 375                 debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr,
 376                        cmd, cword.w,
 377                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 378                 flash_write16(cword.w, addr);
 379                 break;
 380         case FLASH_CFI_32BIT:
 381                 debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr,
 382                        cmd, cword.l,
 383                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 384                 flash_write32(cword.l, addr);
 385                 break;
 386         case FLASH_CFI_64BIT:
 387 #ifdef DEBUG
 388                 {
 389                         char str[20];
 390
 391                         print_longlong (str, cword.ll);
 392
 393                         debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
 394                                addr, cmd, str,
 395                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 396                 }
 397 #endif
 398                 flash_write64(cword.ll, addr);
 399                 break;
 400         }
 401
 402         /* Ensure all the instructions are fully finished */
 403         sync();
 404
 405         flash_unmap(info, sect, offset, addr);
 406 }
 407
 408 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
 409 {
 410         flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_UNLOCK_START);
 411         flash_write_cmd (info, sect, info->addr_unlock2, AMD_CMD_UNLOCK_ACK);
 412 }
 413
 414 /*-----------------------------------------------------------------------
 415  */
 416 static int flash_isequal (flash_info_t * info, flash_sect_t sect,
 417                           uint offset, uchar cmd)
 418 {
 419         void *addr;
 420         cfiword_t cword;
 421         int retval;
 422
 423         addr = flash_map (info, sect, offset);
 424         flash_make_cmd (info, cmd, &cword);
 425
 426         debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
 427         switch (info->portwidth) {
 428         case FLASH_CFI_8BIT:
 429                 debug ("is= %x %x\n", flash_read8(addr), cword.c);
 430                 retval = (flash_read8(addr) == cword.c);
 431                 break;
 432         case FLASH_CFI_16BIT:
 433                 debug ("is= %4.4x %4.4x\n", flash_read16(addr), cword.w);
 434                 retval = (flash_read16(addr) == cword.w);
 435                 break;
 436         case FLASH_CFI_32BIT:
 437                 debug ("is= %8.8x %8.8lx\n", flash_read32(addr), cword.l);
 438                 retval = (flash_read32(addr) == cword.l);
 439                 break;
 440         case FLASH_CFI_64BIT:
 441 #ifdef DEBUG
 442                 {
 443                         char str1[20];
 444                         char str2[20];
 445
 446                         print_longlong (str1, flash_read64(addr));
 447                         print_longlong (str2, cword.ll);
 448                         debug ("is= %s %s\n", str1, str2);
 449                 }
 450 #endif
 451                 retval = (flash_read64(addr) == cword.ll);
 452                 break;
 453         default:
 454                 retval = 0;
 455                 break;
 456         }
 457         flash_unmap(info, sect, offset, addr);
 458
 459         return retval;
 460 }
 461
 462 /*-----------------------------------------------------------------------
 463  */
 464 static int flash_isset (flash_info_t * info, flash_sect_t sect,
 465                         uint offset, uchar cmd)
 466 {
 467         void *addr;
 468         cfiword_t cword;
 469         int retval;
 470
 471         addr = flash_map (info, sect, offset);
 472         flash_make_cmd (info, cmd, &cword);
 473         switch (info->portwidth) {
 474         case FLASH_CFI_8BIT:
 475                 retval = ((flash_read8(addr) & cword.c) == cword.c);
 476                 break;
 477         case FLASH_CFI_16BIT:
 478                 retval = ((flash_read16(addr) & cword.w) == cword.w);
 479                 break;
 480         case FLASH_CFI_32BIT:
 481                 retval = ((flash_read32(addr) & cword.l) == cword.l);
 482                 break;
 483         case FLASH_CFI_64BIT:
 484                 retval = ((flash_read64(addr) & cword.ll) == cword.ll);
 485                 break;
 486         default:
 487                 retval = 0;
 488                 break;
 489         }
 490         flash_unmap(info, sect, offset, addr);
 491
 492         return retval;
 493 }
 494
 495 /*-----------------------------------------------------------------------
 496  */
 497 static int flash_toggle (flash_info_t * info, flash_sect_t sect,
 498                          uint offset, uchar cmd)
 499 {
 500         void *addr;
 501         cfiword_t cword;
 502         int retval;
 503
 504         addr = flash_map (info, sect, offset);
 505         flash_make_cmd (info, cmd, &cword);
 506         switch (info->portwidth) {
 507         case FLASH_CFI_8BIT:
 508                 retval = flash_read8(addr) != flash_read8(addr);
 509                 break;
 510         case FLASH_CFI_16BIT:
 511                 retval = flash_read16(addr) != flash_read16(addr);
 512                 break;
 513         case FLASH_CFI_32BIT:
 514                 retval = flash_read32(addr) != flash_read32(addr);
 515                 break;
 516         case FLASH_CFI_64BIT:
 517                 retval = ( (flash_read32( addr ) != flash_read32( addr )) ||
 518                            (flash_read32(addr+4) != flash_read32(addr+4)) );
 519                 break;
 520         default:
 521                 retval = 0;
 522                 break;
 523         }
 524         flash_unmap(info, sect, offset, addr);
 525
 526         return retval;
 527 }
 528
 529 /*
 530  * flash_is_busy - check to see if the flash is busy
 531  *
 532  * This routine checks the status of the chip and returns true if the
 533  * chip is busy.
 534  */
 535 static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
 536 {
 537         int retval;
 538
 539         switch (info->vendor) {
 540         case CFI_CMDSET_INTEL_PROG_REGIONS:
 541         case CFI_CMDSET_INTEL_STANDARD:
 542         case CFI_CMDSET_INTEL_EXTENDED:
 543                 retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
 544                 break;
 545         case CFI_CMDSET_AMD_STANDARD:
 546         case CFI_CMDSET_AMD_EXTENDED:
 547 #ifdef CONFIG_FLASH_CFI_LEGACY
 548         case CFI_CMDSET_AMD_LEGACY:
 549 #endif
 550                 retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
 551                 break;
 552         default:
 553                 retval = 0;
 554         }
 555         debug ("flash_is_busy: %d\n", retval);
 556         return retval;
 557 }
 558
 559 /*-----------------------------------------------------------------------
 560  *  wait for XSR.7 to be set. Time out with an error if it does not.
 561  *  This routine does not set the flash to read-array mode.
 562  */
 563 static int flash_status_check (flash_info_t * info, flash_sect_t sector,
 564                                ulong tout, char *prompt)
 565 {
 566         ulong start;
 567
 568 #if CONFIG_SYS_HZ != 1000
 569         if ((ulong)CONFIG_SYS_HZ > 100000)
 570                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 571         else
 572                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 573 #endif
 574
 575         /* Wait for command completion */
 576         reset_timer();
 577         start = get_timer (0);
 578         while (flash_is_busy (info, sector)) {
 579                 if (get_timer (start) > tout) {
 580                         printf ("Flash %s timeout at address %lx data %lx\n",
 581                                 prompt, info->start[sector],
 582                                 flash_read_long (info, sector, 0));
 583                         flash_write_cmd (info, sector, 0, info->cmd_reset);
 584                         udelay(1);
 585                         return ERR_TIMOUT;
 586                 }
 587                 udelay (1);             /* also triggers watchdog */
 588         }
 589         return ERR_OK;
 590 }
 591
 592 /*-----------------------------------------------------------------------
 593  * Wait for XSR.7 to be set, if it times out print an error, otherwise
 594  * do a full status check.
 595  *
 596  * This routine sets the flash to read-array mode.
 597  */
 598 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 599                                     ulong tout, char *prompt)
 600 {
 601         int retcode;
 602
 603         retcode = flash_status_check (info, sector, tout, prompt);
 604         switch (info->vendor) {
 605         case CFI_CMDSET_INTEL_PROG_REGIONS:
 606         case CFI_CMDSET_INTEL_EXTENDED:
 607         case CFI_CMDSET_INTEL_STANDARD:
 608                 if ((retcode != ERR_OK)
 609                     && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 610                         retcode = ERR_INVAL;
 611                         printf ("Flash %s error at address %lx\n", prompt,
 612                                 info->start[sector]);
 613                         if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS |
 614                                          FLASH_STATUS_PSLBS)) {
 615                                 puts ("Command Sequence Error.\n");
 616                         } else if (flash_isset (info, sector, 0,
 617                                                 FLASH_STATUS_ECLBS)) {
 618                                 puts ("Block Erase Error.\n");
 619                                 retcode = ERR_NOT_ERASED;
 620                         } else if (flash_isset (info, sector, 0,
 621                                                 FLASH_STATUS_PSLBS)) {
 622                                 puts ("Locking Error\n");
 623                         }
 624                         if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
 625                                 puts ("Block locked.\n");
 626                                 retcode = ERR_PROTECTED;
 627                         }
 628                         if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
 629                                 puts ("Vpp Low Error.\n");
 630                 }
 631                 flash_write_cmd (info, sector, 0, info->cmd_reset);
 632                 udelay(1);
 633                 break;
 634         default:
 635                 break;
 636         }
 637         return retcode;
 638 }
 639
 640 static int use_flash_status_poll(flash_info_t *info)
 641 {
 642 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 643         if (info->vendor == CFI_CMDSET_AMD_EXTENDED ||
 644             info->vendor == CFI_CMDSET_AMD_STANDARD)
 645                 return 1;
 646 #endif
 647         return 0;
 648 }
 649
 650 static int flash_status_poll(flash_info_t *info, void *src, void *dst,
 651                              ulong tout, char *prompt)
 652 {
 653 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 654         ulong start;
 655         int ready;
 656
 657 #if CONFIG_SYS_HZ != 1000
 658         if ((ulong)CONFIG_SYS_HZ > 100000)
 659                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 660         else
 661                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 662 #endif
 663
 664         /* Wait for command completion */
 665         reset_timer();
 666         start = get_timer(0);
 667         while (1) {
 668                 switch (info->portwidth) {
 669                 case FLASH_CFI_8BIT:
 670                         ready = flash_read8(dst) == flash_read8(src);
 671                         break;
 672                 case FLASH_CFI_16BIT:
 673                         ready = flash_read16(dst) == flash_read16(src);
 674                         break;
 675                 case FLASH_CFI_32BIT:
 676                         ready = flash_read32(dst) == flash_read32(src);
 677                         break;
 678                 case FLASH_CFI_64BIT:
 679                         ready = flash_read64(dst) == flash_read64(src);
 680                         break;
 681                 default:
 682                         ready = 0;
 683                         break;
 684                 }
 685                 if (ready)
 686                         break;
 687                 if (get_timer(start) > tout) {
 688                         printf("Flash %s timeout at address %lx data %lx\n",
 689                                prompt, (ulong)dst, (ulong)flash_read8(dst));
 690                         return ERR_TIMOUT;
 691                 }
 692                 udelay(1);              /* also triggers watchdog */
 693         }
 694 #endif /* CONFIG_SYS_CFI_FLASH_STATUS_POLL */
 695         return ERR_OK;
 696 }
 697
 698 /*-----------------------------------------------------------------------
 699  */
 700 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 701 {
 702 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 703         unsigned short  w;
 704         unsigned int    l;
 705         unsigned long long ll;
 706 #endif
 707
 708         switch (info->portwidth) {
 709         case FLASH_CFI_8BIT:
 710                 cword->c = c;
 711                 break;
 712         case FLASH_CFI_16BIT:
 713 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 714                 w = c;
 715                 w <<= 8;
 716                 cword->w = (cword->w >> 8) | w;
 717 #else
 718                 cword->w = (cword->w << 8) | c;
 719 #endif
 720                 break;
 721         case FLASH_CFI_32BIT:
 722 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 723                 l = c;
 724                 l <<= 24;
 725                 cword->l = (cword->l >> 8) | l;
 726 #else
 727                 cword->l = (cword->l << 8) | c;
 728 #endif
 729                 break;
 730         case FLASH_CFI_64BIT:
 731 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 732                 ll = c;
 733                 ll <<= 56;
 734                 cword->ll = (cword->ll >> 8) | ll;
 735 #else
 736                 cword->ll = (cword->ll << 8) | c;
 737 #endif
 738                 break;
 739         }
 740 }
 741
 742 /*
 743  * Loop through the sector table starting from the previously found sector.
 744  * Searches forwards or backwards, dependent on the passed address.
 745  */
 746 static flash_sect_t find_sector (flash_info_t * info, ulong addr)
 747 {
 748         static flash_sect_t saved_sector = 0; /* previously found sector */
 749         static flash_info_t *saved_info = 0; /* previously used flash bank */
 750         flash_sect_t sector = saved_sector;
 751
 752         if ((info != saved_info) || (sector >= info->sector_count))
 753                 sector = 0;
 754
 755         while ((info->start[sector] < addr)
 756                         && (sector < info->sector_count - 1))
 757                 sector++;
 758         while ((info->start[sector] > addr) && (sector > 0))
 759                 /*
 760                  * also decrements the sector in case of an overshot
 761                  * in the first loop
 762                  */
 763                 sector--;
 764
 765         saved_sector = sector;
 766         saved_info = info;
 767         return sector;
 768 }
 769
 770 /*-----------------------------------------------------------------------
 771  */
 772 static int flash_write_cfiword (flash_info_t * info, ulong dest,
 773                                 cfiword_t cword)
 774 {
 775         void *dstaddr = (void *)dest;
 776         int flag;
 777         flash_sect_t sect = 0;
 778         char sect_found = 0;
 779
 780         /* Check if Flash is (sufficiently) erased */
 781         switch (info->portwidth) {
 782         case FLASH_CFI_8BIT:
 783                 flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
 784                 break;
 785         case FLASH_CFI_16BIT:
 786                 flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
 787                 break;
 788         case FLASH_CFI_32BIT:
 789                 flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
 790                 break;
 791         case FLASH_CFI_64BIT:
 792                 flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
 793                 break;
 794         default:
 795                 flag = 0;
 796                 break;
 797         }
 798         if (!flag)
 799                 return ERR_NOT_ERASED;
 800
 801         /* Disable interrupts which might cause a timeout here */
 802         flag = disable_interrupts ();
 803
 804         switch (info->vendor) {
 805         case CFI_CMDSET_INTEL_PROG_REGIONS:
 806         case CFI_CMDSET_INTEL_EXTENDED:
 807         case CFI_CMDSET_INTEL_STANDARD:
 808                 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
 809                 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
 810                 break;
 811         case CFI_CMDSET_AMD_EXTENDED:
 812         case CFI_CMDSET_AMD_STANDARD:
 813                 sect = find_sector(info, dest);
 814                 flash_unlock_seq (info, sect);
 815                 flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE);
 816                 sect_found = 1;
 817                 break;
 818 #ifdef CONFIG_FLASH_CFI_LEGACY
 819         case CFI_CMDSET_AMD_LEGACY:
 820                 sect = find_sector(info, dest);
 821                 flash_unlock_seq (info, 0);
 822                 flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_WRITE);
 823                 sect_found = 1;
 824                 break;
 825 #endif
 826         }
 827
 828         switch (info->portwidth) {
 829         case FLASH_CFI_8BIT:
 830                 flash_write8(cword.c, dstaddr);
 831                 break;
 832         case FLASH_CFI_16BIT:
 833                 flash_write16(cword.w, dstaddr);
 834                 break;
 835         case FLASH_CFI_32BIT:
 836                 flash_write32(cword.l, dstaddr);
 837                 break;
 838         case FLASH_CFI_64BIT:
 839                 flash_write64(cword.ll, dstaddr);
 840                 break;
 841         }
 842
 843         /* re-enable interrupts if necessary */
 844         if (flag)
 845                 enable_interrupts ();
 846
 847         if (!sect_found)
 848                 sect = find_sector (info, dest);
 849
 850         if (use_flash_status_poll(info))
 851                 return flash_status_poll(info, &cword, dstaddr,
 852                                          info->write_tout, "write");
 853         else
 854                 return flash_full_status_check(info, sect,
 855                                                info->write_tout, "write");
 856 }
 857
 858 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 859
 860 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
 861                                   int len)
 862 {
 863         flash_sect_t sector;
 864         int cnt;
 865         int retcode;
 866         void *src = cp;
 867         void *dst = (void *)dest;
 868         void *dst2 = dst;
 869         int flag = 0;
 870         uint offset = 0;
 871         unsigned int shift;
 872         uchar write_cmd;
 873
 874         switch (info->portwidth) {
 875         case FLASH_CFI_8BIT:
 876                 shift = 0;
 877                 break;
 878         case FLASH_CFI_16BIT:
 879                 shift = 1;
 880                 break;
 881         case FLASH_CFI_32BIT:
 882                 shift = 2;
 883                 break;
 884         case FLASH_CFI_64BIT:
 885                 shift = 3;
 886                 break;
 887         default:
 888                 retcode = ERR_INVAL;
 889                 goto out_unmap;
 890         }
 891
 892         cnt = len >> shift;
 893
 894         while ((cnt-- > 0) && (flag == 0)) {
 895                 switch (info->portwidth) {
 896                 case FLASH_CFI_8BIT:
 897                         flag = ((flash_read8(dst2) & flash_read8(src)) ==
 898                                 flash_read8(src));
 899                         src += 1, dst2 += 1;
 900                         break;
 901                 case FLASH_CFI_16BIT:
 902                         flag = ((flash_read16(dst2) & flash_read16(src)) ==
 903                                 flash_read16(src));
 904                         src += 2, dst2 += 2;
 905                         break;
 906                 case FLASH_CFI_32BIT:
 907                         flag = ((flash_read32(dst2) & flash_read32(src)) ==
 908                                 flash_read32(src));
 909                         src += 4, dst2 += 4;
 910                         break;
 911                 case FLASH_CFI_64BIT:
 912                         flag = ((flash_read64(dst2) & flash_read64(src)) ==
 913                                 flash_read64(src));
 914                         src += 8, dst2 += 8;
 915                         break;
 916                 }
 917         }
 918         if (!flag) {
 919                 retcode = ERR_NOT_ERASED;
 920                 goto out_unmap;
 921         }
 922
 923         src = cp;
 924         sector = find_sector (info, dest);
 925
 926         switch (info->vendor) {
 927         case CFI_CMDSET_INTEL_PROG_REGIONS:
 928         case CFI_CMDSET_INTEL_STANDARD:
 929         case CFI_CMDSET_INTEL_EXTENDED:
 930                 write_cmd = (info->vendor == CFI_CMDSET_INTEL_PROG_REGIONS) ?
 931                                         FLASH_CMD_WRITE_BUFFER_PROG : FLASH_CMD_WRITE_TO_BUFFER;
 932                 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 933                 flash_write_cmd (info, sector, 0, FLASH_CMD_READ_STATUS);
 934                 flash_write_cmd (info, sector, 0, write_cmd);
 935                 retcode = flash_status_check (info, sector,
 936                                               info->buffer_write_tout,
 937                                               "write to buffer");
 938                 if (retcode == ERR_OK) {
 939                         /* reduce the number of loops by the width of
 940                          * the port */
 941                         cnt = len >> shift;
 942                         flash_write_cmd (info, sector, 0, cnt - 1);
 943                         while (cnt-- > 0) {
 944                                 switch (info->portwidth) {
 945                                 case FLASH_CFI_8BIT:
 946                                         flash_write8(flash_read8(src), dst);
 947                                         src += 1, dst += 1;
 948                                         break;
 949                                 case FLASH_CFI_16BIT:
 950                                         flash_write16(flash_read16(src), dst);
 951                                         src += 2, dst += 2;
 952                                         break;
 953                                 case FLASH_CFI_32BIT:
 954                                         flash_write32(flash_read32(src), dst);
 955                                         src += 4, dst += 4;
 956                                         break;
 957                                 case FLASH_CFI_64BIT:
 958                                         flash_write64(flash_read64(src), dst);
 959                                         src += 8, dst += 8;
 960                                         break;
 961                                 default:
 962                                         retcode = ERR_INVAL;
 963                                         goto out_unmap;
 964                                 }
 965                         }
 966                         flash_write_cmd (info, sector, 0,
 967                                          FLASH_CMD_WRITE_BUFFER_CONFIRM);
 968                         retcode = flash_full_status_check (
 969                                 info, sector, info->buffer_write_tout,
 970                                 "buffer write");
 971                 }
 972
 973                 break;
 974
 975         case CFI_CMDSET_AMD_STANDARD:
 976         case CFI_CMDSET_AMD_EXTENDED:
 977                 flash_unlock_seq(info,0);
 978
 979 #ifdef CONFIG_FLASH_SPANSION_S29WS_N
 980                 offset = ((unsigned long)dst - info->start[sector]) >> shift;
 981 #endif
 982                 flash_write_cmd(info, sector, offset, AMD_CMD_WRITE_TO_BUFFER);
 983                 cnt = len >> shift;
 984                 flash_write_cmd(info, sector, offset, cnt - 1);
 985
 986                 switch (info->portwidth) {
 987                 case FLASH_CFI_8BIT:
 988                         while (cnt-- > 0) {
 989                                 flash_write8(flash_read8(src), dst);
 990                                 src += 1, dst += 1;
 991                         }
 992                         break;
 993                 case FLASH_CFI_16BIT:
 994                         while (cnt-- > 0) {
 995                                 flash_write16(flash_read16(src), dst);
 996                                 src += 2, dst += 2;
 997                         }
 998                         break;
 999                 case FLASH_CFI_32BIT:
1000                         while (cnt-- > 0) {
1001                                 flash_write32(flash_read32(src), dst);
1002                                 src += 4, dst += 4;
1003                         }
1004                         break;
1005                 case FLASH_CFI_64BIT:
1006                         while (cnt-- > 0) {
1007                                 flash_write64(flash_read64(src), dst);
1008                                 src += 8, dst += 8;
1009                         }
1010                         break;
1011                 default:
1012                         retcode = ERR_INVAL;
1013                         goto out_unmap;
1014                 }
1015
1016                 flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
1017                 if (use_flash_status_poll(info))
1018                         retcode = flash_status_poll(info, src - (1 << shift),
1019                                                     dst - (1 << shift),
1020                                                     info->buffer_write_tout,
1021                                                     "buffer write");
1022                 else
1023                         retcode = flash_full_status_check(info, sector,
1024                                                           info->buffer_write_tout,
1025                                                           "buffer write");
1026                 break;
1027
1028         default:
1029                 debug ("Unknown Command Set\n");
1030                 retcode = ERR_INVAL;
1031                 break;
1032         }
1033
1034 out_unmap:
1035         return retcode;
1036 }
1037 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1038
1039
1040 /*-----------------------------------------------------------------------
1041  */
1042 int flash_erase (flash_info_t * info, int s_first, int s_last)
1043 {
1044         int rcode = 0;
1045         int prot;
1046         flash_sect_t sect;
1047         int st;
1048
1049         if (info->flash_id != FLASH_MAN_CFI) {
1050                 puts ("Can't erase unknown flash type - aborted\n");
1051                 return 1;
1052         }
1053         if ((s_first < 0) || (s_first > s_last)) {
1054                 puts ("- no sectors to erase\n");
1055                 return 1;
1056         }
1057
1058         prot = 0;
1059         for (sect = s_first; sect <= s_last; ++sect) {
1060                 if (info->protect[sect]) {
1061                         prot++;
1062                 }
1063         }
1064         if (prot) {
1065                 printf ("- Warning: %d protected sectors will not be erased!\n",
1066                         prot);
1067         } else if (flash_verbose) {
1068                 putc ('\n');
1069         }
1070
1071
1072         for (sect = s_first; sect <= s_last; sect++) {
1073                 if (info->protect[sect] == 0) { /* not protected */
1074                         switch (info->vendor) {
1075                         case CFI_CMDSET_INTEL_PROG_REGIONS:
1076                         case CFI_CMDSET_INTEL_STANDARD:
1077                         case CFI_CMDSET_INTEL_EXTENDED:
1078                                 flash_write_cmd (info, sect, 0,
1079                                                  FLASH_CMD_CLEAR_STATUS);
1080                                 flash_write_cmd (info, sect, 0,
1081                                                  FLASH_CMD_BLOCK_ERASE);
1082                                 flash_write_cmd (info, sect, 0,
1083                                                  FLASH_CMD_ERASE_CONFIRM);
1084                                 break;
1085                         case CFI_CMDSET_AMD_STANDARD:
1086                         case CFI_CMDSET_AMD_EXTENDED:
1087                                 flash_unlock_seq (info, sect);
1088                                 flash_write_cmd (info, sect,
1089                                                 info->addr_unlock1,
1090                                                 AMD_CMD_ERASE_START);
1091                                 flash_unlock_seq (info, sect);
1092                                 flash_write_cmd (info, sect, 0,
1093                                                  AMD_CMD_ERASE_SECTOR);
1094                                 break;
1095 #ifdef CONFIG_FLASH_CFI_LEGACY
1096                         case CFI_CMDSET_AMD_LEGACY:
1097                                 flash_unlock_seq (info, 0);
1098                                 flash_write_cmd (info, 0, info->addr_unlock1,
1099                                                 AMD_CMD_ERASE_START);
1100                                 flash_unlock_seq (info, 0);
1101                                 flash_write_cmd (info, sect, 0,
1102                                                 AMD_CMD_ERASE_SECTOR);
1103                                 break;
1104 #endif
1105                         default:
1106                                 debug ("Unkown flash vendor %d\n",
1107                                        info->vendor);
1108                                 break;
1109                         }
1110
1111                         if (use_flash_status_poll(info)) {
1112                                 cfiword_t cword = (cfiword_t)0xffffffffffffffffULL;
1113                                 void *dest;
1114                                 dest = flash_map(info, sect, 0);
1115                                 st = flash_status_poll(info, &cword, dest,
1116                                                        info->erase_blk_tout, "erase");
1117                                 flash_unmap(info, sect, 0, dest);
1118                         } else
1119                                 st = flash_full_status_check(info, sect,
1120                                                              info->erase_blk_tout,
1121                                                              "erase");
1122                         if (st)
1123                                 rcode = 1;
1124                         else if (flash_verbose)
1125                                 putc ('.');
1126                 }
1127         }
1128
1129         if (flash_verbose)
1130                 puts (" done\n");
1131
1132         return rcode;
1133 }
1134
1135 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1136 static int sector_erased(flash_info_t *info, int i)
1137 {
1138         int k;
1139         int size;
1140         u32 *flash;
1141
1142         /*
1143          * Check if whole sector is erased
1144          */
1145         size = flash_sector_size(info, i);
1146         flash = (u32 *)info->start[i];
1147         /* divide by 4 for longword access */
1148         size = size >> 2;
1149
1150         for (k = 0; k < size; k++) {
1151                 if (flash_read32(flash++) != 0xffffffff)
1152                         return 0;       /* not erased */
1153         }
1154
1155         return 1;                       /* erased */
1156 }
1157 #endif /* CONFIG_SYS_FLASH_EMPTY_INFO */
1158
1159 void flash_print_info (flash_info_t * info)
1160 {
1161         int i;
1162
1163         if (info->flash_id != FLASH_MAN_CFI) {
1164                 puts ("missing or unknown FLASH type\n");
1165                 return;
1166         }
1167
1168         printf ("%s flash (%d x %d)",
1169                 info->name,
1170                 (info->portwidth << 3), (info->chipwidth << 3));
1171         if (info->size < 1024*1024)
1172                 printf ("  Size: %ld kB in %d Sectors\n",
1173                         info->size >> 10, info->sector_count);
1174         else
1175                 printf ("  Size: %ld MB in %d Sectors\n",
1176                         info->size >> 20, info->sector_count);
1177         printf ("  ");
1178         switch (info->vendor) {
1179                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1180                         printf ("Intel Prog Regions");
1181                         break;
1182                 case CFI_CMDSET_INTEL_STANDARD:
1183                         printf ("Intel Standard");
1184                         break;
1185                 case CFI_CMDSET_INTEL_EXTENDED:
1186                         printf ("Intel Extended");
1187                         break;
1188                 case CFI_CMDSET_AMD_STANDARD:
1189                         printf ("AMD Standard");
1190                         break;
1191                 case CFI_CMDSET_AMD_EXTENDED:
1192                         printf ("AMD Extended");
1193                         break;
1194 #ifdef CONFIG_FLASH_CFI_LEGACY
1195                 case CFI_CMDSET_AMD_LEGACY:
1196                         printf ("AMD Legacy");
1197                         break;
1198 #endif
1199                 default:
1200                         printf ("Unknown (%d)", info->vendor);
1201                         break;
1202         }
1203         printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x",
1204                 info->manufacturer_id);
1205         printf (info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1206                 info->device_id);
1207         if ((info->device_id & 0xff) == 0x7E) {
1208                 printf(info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1209                 info->device_id2);
1210         }
1211         printf ("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
1212                 info->erase_blk_tout,
1213                 info->write_tout);
1214         if (info->buffer_size > 1) {
1215                 printf ("  Buffer write timeout: %ld ms, "
1216                         "buffer size: %d bytes\n",
1217                 info->buffer_write_tout,
1218                 info->buffer_size);
1219         }
1220
1221         puts ("\n  Sector Start Addresses:");
1222         for (i = 0; i < info->sector_count; ++i) {
1223                 if (ctrlc())
1224                         break;
1225                 if ((i % 5) == 0)
1226                         putc('\n');
1227 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1228                 /* print empty and read-only info */
1229                 printf ("  %08lX %c %s ",
1230                         info->start[i],
1231                         sector_erased(info, i) ? 'E' : ' ',
1232                         info->protect[i] ? "RO" : "  ");
1233 #else   /* ! CONFIG_SYS_FLASH_EMPTY_INFO */
1234                 printf ("  %08lX   %s ",
1235                         info->start[i],
1236                         info->protect[i] ? "RO" : "  ");
1237 #endif
1238         }
1239         putc ('\n');
1240         return;
1241 }
1242
1243 /*-----------------------------------------------------------------------
1244  * This is used in a few places in write_buf() to show programming
1245  * progress.  Making it a function is nasty because it needs to do side
1246  * effect updates to digit and dots.  Repeated code is nasty too, so
1247  * we define it once here.
1248  */
1249 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1250 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub) \
1251         if (flash_verbose) { \
1252                 dots -= dots_sub; \
1253                 if ((scale > 0) && (dots <= 0)) { \
1254                         if ((digit % 5) == 0) \
1255                                 printf ("%d", digit / 5); \
1256                         else \
1257                                 putc ('.'); \
1258                         digit--; \
1259                         dots += scale; \
1260                 } \
1261         }
1262 #else
1263 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub)
1264 #endif
1265
1266 /*-----------------------------------------------------------------------
1267  * Copy memory to flash, returns:
1268  * 0 - OK
1269  * 1 - write timeout
1270  * 2 - Flash not erased
1271  */
1272 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
1273 {
1274         ulong wp;
1275         uchar *p;
1276         int aln;
1277         cfiword_t cword;
1278         int i, rc;
1279 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1280         int buffered_size;
1281 #endif
1282 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1283         int digit = CONFIG_FLASH_SHOW_PROGRESS;
1284         int scale = 0;
1285         int dots  = 0;
1286
1287         /*
1288          * Suppress if there are fewer than CONFIG_FLASH_SHOW_PROGRESS writes.
1289          */
1290         if (cnt >= CONFIG_FLASH_SHOW_PROGRESS) {
1291                 scale = (int)((cnt + CONFIG_FLASH_SHOW_PROGRESS - 1) /
1292                         CONFIG_FLASH_SHOW_PROGRESS);
1293         }
1294 #endif
1295
1296         /* get lower aligned address */
1297         wp = (addr & ~(info->portwidth - 1));
1298
1299         /* handle unaligned start */
1300         if ((aln = addr - wp) != 0) {
1301                 cword.l = 0;
1302                 p = (uchar *)wp;
1303                 for (i = 0; i < aln; ++i)
1304                         flash_add_byte (info, &cword, flash_read8(p + i));
1305
1306                 for (; (i < info->portwidth) && (cnt > 0); i++) {
1307                         flash_add_byte (info, &cword, *src++);
1308                         cnt--;
1309                 }
1310                 for (; (cnt == 0) && (i < info->portwidth); ++i)
1311                         flash_add_byte (info, &cword, flash_read8(p + i));
1312
1313                 rc = flash_write_cfiword (info, wp, cword);
1314                 if (rc != 0)
1315                         return rc;
1316
1317                 wp += i;
1318                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1319         }
1320
1321         /* handle the aligned part */
1322 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1323         buffered_size = (info->portwidth / info->chipwidth);
1324         buffered_size *= info->buffer_size;
1325         while (cnt >= info->portwidth) {
1326                 /* prohibit buffer write when buffer_size is 1 */
1327                 if (info->buffer_size == 1) {
1328                         cword.l = 0;
1329                         for (i = 0; i < info->portwidth; i++)
1330                                 flash_add_byte (info, &cword, *src++);
1331                         if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1332                                 return rc;
1333                         wp += info->portwidth;
1334                         cnt -= info->portwidth;
1335                         continue;
1336                 }
1337
1338                 /* write buffer until next buffered_size aligned boundary */
1339                 i = buffered_size - (wp % buffered_size);
1340                 if (i > cnt)
1341                         i = cnt;
1342                 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
1343                         return rc;
1344                 i -= i & (info->portwidth - 1);
1345                 wp += i;
1346                 src += i;
1347                 cnt -= i;
1348                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1349         }
1350 #else
1351         while (cnt >= info->portwidth) {
1352                 cword.l = 0;
1353                 for (i = 0; i < info->portwidth; i++) {
1354                         flash_add_byte (info, &cword, *src++);
1355                 }
1356                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1357                         return rc;
1358                 wp += info->portwidth;
1359                 cnt -= info->portwidth;
1360                 FLASH_SHOW_PROGRESS(scale, dots, digit, info->portwidth);
1361         }
1362 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1363
1364         if (cnt == 0) {
1365                 return (0);
1366         }
1367
1368         /*
1369          * handle unaligned tail bytes
1370          */
1371         cword.l = 0;
1372         p = (uchar *)wp;
1373         for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
1374                 flash_add_byte (info, &cword, *src++);
1375                 --cnt;
1376         }
1377         for (; i < info->portwidth; ++i)
1378                 flash_add_byte (info, &cword, flash_read8(p + i));
1379
1380         return flash_write_cfiword (info, wp, cword);
1381 }
1382
1383 /*-----------------------------------------------------------------------
1384  */
1385 #ifdef CONFIG_SYS_FLASH_PROTECTION
1386
1387 int flash_real_protect (flash_info_t * info, long sector, int prot)
1388 {
1389         int retcode = 0;
1390
1391         switch (info->vendor) {
1392                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1393                 case CFI_CMDSET_INTEL_STANDARD:
1394                 case CFI_CMDSET_INTEL_EXTENDED:
1395                         /*
1396                          * see errata called
1397                          * "Numonyx Axcell P33/P30 Specification Update" :)
1398                          */
1399                         flash_write_cmd (info, sector, 0, FLASH_CMD_READ_ID);
1400                         if (!flash_isequal (info, sector, FLASH_OFFSET_PROTECT,
1401                                             prot)) {
1402                                 /*
1403                                  * cmd must come before FLASH_CMD_PROTECT + 20us
1404                                  * Disable interrupts which might cause a timeout here.
1405                                  */
1406                                 int flag = disable_interrupts ();
1407                                 unsigned short cmd;
1408
1409                                 if (prot)
1410                                         cmd = FLASH_CMD_PROTECT_SET;
1411                                 else
1412                                         cmd = FLASH_CMD_PROTECT_CLEAR;
1413
1414                                 flash_write_cmd (info, sector, 0,
1415                                                   FLASH_CMD_PROTECT);
1416                                 flash_write_cmd (info, sector, 0, cmd);
1417                                 /* re-enable interrupts if necessary */
1418                                 if (flag)
1419                                         enable_interrupts ();
1420                         }
1421                         break;
1422                 case CFI_CMDSET_AMD_EXTENDED:
1423                 case CFI_CMDSET_AMD_STANDARD:
1424                         /* U-Boot only checks the first byte */
1425                         if (info->manufacturer_id == (uchar)ATM_MANUFACT) {
1426                                 if (prot) {
1427                                         flash_unlock_seq (info, 0);
1428                                         flash_write_cmd (info, 0,
1429                                                         info->addr_unlock1,
1430                                                         ATM_CMD_SOFTLOCK_START);
1431                                         flash_unlock_seq (info, 0);
1432                                         flash_write_cmd (info, sector, 0,
1433                                                         ATM_CMD_LOCK_SECT);
1434                                 } else {
1435                                         flash_write_cmd (info, 0,
1436                                                         info->addr_unlock1,
1437                                                         AMD_CMD_UNLOCK_START);
1438                                         if (info->device_id == ATM_ID_BV6416)
1439                                                 flash_write_cmd (info, sector,
1440                                                         0, ATM_CMD_UNLOCK_SECT);
1441                                 }
1442                         }
1443                         break;
1444 #ifdef CONFIG_FLASH_CFI_LEGACY
1445                 case CFI_CMDSET_AMD_LEGACY:
1446                         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1447                         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
1448                         if (prot)
1449                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
1450                         else
1451                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
1452 #endif
1453         };
1454
1455         /*
1456          * Flash needs to be in status register read mode for
1457          * flash_full_status_check() to work correctly
1458          */
1459         flash_write_cmd(info, sector, 0, FLASH_CMD_READ_STATUS);
1460         if ((retcode =
1461              flash_full_status_check (info, sector, info->erase_blk_tout,
1462                                       prot ? "protect" : "unprotect")) == 0) {
1463
1464                 info->protect[sector] = prot;
1465
1466                 /*
1467                  * On some of Intel's flash chips (marked via legacy_unlock)
1468                  * unprotect unprotects all locking.
1469                  */
1470                 if ((prot == 0) && (info->legacy_unlock)) {
1471                         flash_sect_t i;
1472
1473                         for (i = 0; i < info->sector_count; i++) {
1474                                 if (info->protect[i])
1475                                         flash_real_protect (info, i, 1);
1476                         }
1477                 }
1478         }
1479         return retcode;
1480 }
1481
1482 /*-----------------------------------------------------------------------
1483  * flash_read_user_serial - read the OneTimeProgramming cells
1484  */
1485 void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
1486                              int len)
1487 {
1488         uchar *src;
1489         uchar *dst;
1490
1491         dst = buffer;
1492         src = flash_map (info, 0, FLASH_OFFSET_USER_PROTECTION);
1493         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1494         memcpy (dst, src + offset, len);
1495         flash_write_cmd (info, 0, 0, info->cmd_reset);
1496         udelay(1);
1497         flash_unmap(info, 0, FLASH_OFFSET_USER_PROTECTION, src);
1498 }
1499
1500 /*
1501  * flash_read_factory_serial - read the device Id from the protection area
1502  */
1503 void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
1504                                 int len)
1505 {
1506         uchar *src;
1507
1508         src = flash_map (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
1509         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1510         memcpy (buffer, src + offset, len);
1511         flash_write_cmd (info, 0, 0, info->cmd_reset);
1512         udelay(1);
1513         flash_unmap(info, 0, FLASH_OFFSET_INTEL_PROTECTION, src);
1514 }
1515
1516 #endif /* CONFIG_SYS_FLASH_PROTECTION */
1517
1518 /*-----------------------------------------------------------------------
1519  * Reverse the order of the erase regions in the CFI QRY structure.
1520  * This is needed for chips that are either a) correctly detected as
1521  * top-boot, or b) buggy.
1522  */
1523 static void cfi_reverse_geometry(struct cfi_qry *qry)
1524 {
1525         unsigned int i, j;
1526         u32 tmp;
1527
1528         for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) {
1529                 tmp = qry->erase_region_info[i];
1530                 qry->erase_region_info[i] = qry->erase_region_info[j];
1531                 qry->erase_region_info[j] = tmp;
1532         }
1533 }
1534
1535 /*-----------------------------------------------------------------------
1536  * read jedec ids from device and set corresponding fields in info struct
1537  *
1538  * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
1539  *
1540  */
1541 static void cmdset_intel_read_jedec_ids(flash_info_t *info)
1542 {
1543         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1544         udelay(1);
1545         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1546         udelay(1000); /* some flash are slow to respond */
1547         info->manufacturer_id = flash_read_uchar (info,
1548                                         FLASH_OFFSET_MANUFACTURER_ID);
1549         info->device_id = (info->chipwidth == FLASH_CFI_16BIT) ?
1550                         flash_read_word (info, FLASH_OFFSET_DEVICE_ID) :
1551                         flash_read_uchar (info, FLASH_OFFSET_DEVICE_ID);
1552         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1553 }
1554
1555 static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry)
1556 {
1557         info->cmd_reset = FLASH_CMD_RESET;
1558
1559         cmdset_intel_read_jedec_ids(info);
1560         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1561
1562 #ifdef CONFIG_SYS_FLASH_PROTECTION
1563         /* read legacy lock/unlock bit from intel flash */
1564         if (info->ext_addr) {
1565                 info->legacy_unlock = flash_read_uchar (info,
1566                                 info->ext_addr + 5) & 0x08;
1567         }
1568 #endif
1569
1570         return 0;
1571 }
1572
1573 static void cmdset_amd_read_jedec_ids(flash_info_t *info)
1574 {
1575         ushort bankId = 0;
1576         uchar  manuId;
1577
1578         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1579         flash_unlock_seq(info, 0);
1580         flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
1581         udelay(1000); /* some flash are slow to respond */
1582
1583         manuId = flash_read_uchar (info, FLASH_OFFSET_MANUFACTURER_ID);
1584         /* JEDEC JEP106Z specifies ID codes up to bank 7 */
1585         while (manuId == FLASH_CONTINUATION_CODE && bankId < 0x800) {
1586                 bankId += 0x100;
1587                 manuId = flash_read_uchar (info,
1588                         bankId | FLASH_OFFSET_MANUFACTURER_ID);
1589         }
1590         info->manufacturer_id = manuId;
1591
1592         switch (info->chipwidth){
1593         case FLASH_CFI_8BIT:
1594                 info->device_id = flash_read_uchar (info,
1595                                                 FLASH_OFFSET_DEVICE_ID);
1596                 if (info->device_id == 0x7E) {
1597                         /* AMD 3-byte (expanded) device ids */
1598                         info->device_id2 = flash_read_uchar (info,
1599                                                 FLASH_OFFSET_DEVICE_ID2);
1600                         info->device_id2 <<= 8;
1601                         info->device_id2 |= flash_read_uchar (info,
1602                                                 FLASH_OFFSET_DEVICE_ID3);
1603                 }
1604                 break;
1605         case FLASH_CFI_16BIT:
1606                 info->device_id = flash_read_word (info,
1607                                                 FLASH_OFFSET_DEVICE_ID);
1608                 if ((info->device_id & 0xff) == 0x7E) {
1609                         /* AMD 3-byte (expanded) device ids */
1610                         info->device_id2 = flash_read_uchar (info,
1611                                                 FLASH_OFFSET_DEVICE_ID2);
1612                         info->device_id2 <<= 8;
1613                         info->device_id2 |= flash_read_uchar (info,
1614                                                 FLASH_OFFSET_DEVICE_ID3);
1615                 }
1616                 break;
1617         default:
1618                 break;
1619         }
1620         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1621         udelay(1);
1622 }
1623
1624 static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry)
1625 {
1626         info->cmd_reset = AMD_CMD_RESET;
1627
1628         cmdset_amd_read_jedec_ids(info);
1629         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1630
1631         return 0;
1632 }
1633
1634 #ifdef CONFIG_FLASH_CFI_LEGACY
1635 static void flash_read_jedec_ids (flash_info_t * info)
1636 {
1637         info->manufacturer_id = 0;
1638         info->device_id       = 0;
1639         info->device_id2      = 0;
1640
1641         switch (info->vendor) {
1642         case CFI_CMDSET_INTEL_PROG_REGIONS:
1643         case CFI_CMDSET_INTEL_STANDARD:
1644         case CFI_CMDSET_INTEL_EXTENDED:
1645                 cmdset_intel_read_jedec_ids(info);
1646                 break;
1647         case CFI_CMDSET_AMD_STANDARD:
1648         case CFI_CMDSET_AMD_EXTENDED:
1649                 cmdset_amd_read_jedec_ids(info);
1650                 break;
1651         default:
1652                 break;
1653         }
1654 }
1655
1656 /*-----------------------------------------------------------------------
1657  * Call board code to request info about non-CFI flash.
1658  * board_flash_get_legacy needs to fill in at least:
1659  * info->portwidth, info->chipwidth and info->interface for Jedec probing.
1660  */
1661 static int flash_detect_legacy(phys_addr_t base, int banknum)
1662 {
1663         flash_info_t *info = &flash_info[banknum];
1664
1665         if (board_flash_get_legacy(base, banknum, info)) {
1666                 /* board code may have filled info completely. If not, we
1667                    use JEDEC ID probing. */
1668                 if (!info->vendor) {
1669                         int modes[] = {
1670                                 CFI_CMDSET_AMD_STANDARD,
1671                                 CFI_CMDSET_INTEL_STANDARD
1672                         };
1673                         int i;
1674
1675                         for (i = 0; i < sizeof(modes) / sizeof(modes[0]); i++) {
1676                                 info->vendor = modes[i];
1677                                 info->start[0] =
1678                                         (ulong)map_physmem(base,
1679                                                            info->portwidth,
1680                                                            MAP_NOCACHE);
1681                                 if (info->portwidth == FLASH_CFI_8BIT
1682                                         && info->interface == FLASH_CFI_X8X16) {
1683                                         info->addr_unlock1 = 0x2AAA;
1684                                         info->addr_unlock2 = 0x5555;
1685                                 } else {
1686                                         info->addr_unlock1 = 0x5555;
1687                                         info->addr_unlock2 = 0x2AAA;
1688                                 }
1689                                 flash_read_jedec_ids(info);
1690                                 debug("JEDEC PROBE: ID %x %x %x\n",
1691                                                 info->manufacturer_id,
1692                                                 info->device_id,
1693                                                 info->device_id2);
1694                                 if (jedec_flash_match(info, info->start[0]))
1695                                         break;
1696                                 else
1697                                         unmap_physmem((void *)info->start[0],
1698                                                       MAP_NOCACHE);
1699                         }
1700                 }
1701
1702                 switch(info->vendor) {
1703                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1704                 case CFI_CMDSET_INTEL_STANDARD:
1705                 case CFI_CMDSET_INTEL_EXTENDED:
1706                         info->cmd_reset = FLASH_CMD_RESET;
1707                         break;
1708                 case CFI_CMDSET_AMD_STANDARD:
1709                 case CFI_CMDSET_AMD_EXTENDED:
1710                 case CFI_CMDSET_AMD_LEGACY:
1711                         info->cmd_reset = AMD_CMD_RESET;
1712                         break;
1713                 }
1714                 info->flash_id = FLASH_MAN_CFI;
1715                 return 1;
1716         }
1717         return 0; /* use CFI */
1718 }
1719 #else
1720 static inline int flash_detect_legacy(phys_addr_t base, int banknum)
1721 {
1722         return 0; /* use CFI */
1723 }
1724 #endif
1725
1726 /*-----------------------------------------------------------------------
1727  * detect if flash is compatible with the Common Flash Interface (CFI)
1728  * http://www.jedec.org/download/search/jesd68.pdf
1729  */
1730 static void flash_read_cfi (flash_info_t *info, void *buf,
1731                 unsigned int start, size_t len)
1732 {
1733         u8 *p = buf;
1734         unsigned int i;
1735
1736         for (i = 0; i < len; i++)
1737                 p[i] = flash_read_uchar(info, start + i);
1738 }
1739
1740 void __flash_cmd_reset(flash_info_t *info)
1741 {
1742         /*
1743          * We do not yet know what kind of commandset to use, so we issue
1744          * the reset command in both Intel and AMD variants, in the hope
1745          * that AMD flash roms ignore the Intel command.
1746          */
1747         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1748         udelay(1);
1749         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1750 }
1751 void flash_cmd_reset(flash_info_t *info)
1752         __attribute__((weak,alias("__flash_cmd_reset")));
1753
1754 static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1755 {
1756         int cfi_offset;
1757
1758         /* Issue FLASH reset command */
1759         flash_cmd_reset(info);
1760
1761         for (cfi_offset=0;
1762              cfi_offset < sizeof(flash_offset_cfi) / sizeof(uint);
1763              cfi_offset++) {
1764                 flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset],
1765                                  FLASH_CMD_CFI);
1766                 if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
1767                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
1768                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
1769                         flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
1770                                         sizeof(struct cfi_qry));
1771                         info->interface = le16_to_cpu(qry->interface_desc);
1772
1773                         info->cfi_offset = flash_offset_cfi[cfi_offset];
1774                         debug ("device interface is %d\n",
1775                                info->interface);
1776                         debug ("found port %d chip %d ",
1777                                info->portwidth, info->chipwidth);
1778                         debug ("port %d bits chip %d bits\n",
1779                                info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1780                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1781
1782                         /* calculate command offsets as in the Linux driver */
1783                         info->addr_unlock1 = 0x555;
1784                         info->addr_unlock2 = 0x2aa;
1785
1786                         /*
1787                          * modify the unlock address if we are
1788                          * in compatibility mode
1789                          */
1790                         if (    /* x8/x16 in x8 mode */
1791                                 ((info->chipwidth == FLASH_CFI_BY8) &&
1792                                         (info->interface == FLASH_CFI_X8X16)) ||
1793                                 /* x16/x32 in x16 mode */
1794                                 ((info->chipwidth == FLASH_CFI_BY16) &&
1795                                         (info->interface == FLASH_CFI_X16X32)))
1796                         {
1797                                 info->addr_unlock1 = 0xaaa;
1798                                 info->addr_unlock2 = 0x555;
1799                         }
1800
1801                         info->name = "CFI conformant";
1802                         return 1;
1803                 }
1804         }
1805
1806         return 0;
1807 }
1808
1809 static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1810 {
1811         debug ("flash detect cfi\n");
1812
1813         for (info->portwidth = CONFIG_SYS_FLASH_CFI_WIDTH;
1814              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
1815                 for (info->chipwidth = FLASH_CFI_BY8;
1816                      info->chipwidth <= info->portwidth;
1817                      info->chipwidth <<= 1)
1818                         if (__flash_detect_cfi(info, qry))
1819                                 return 1;
1820         }
1821         debug ("not found\n");
1822         return 0;
1823 }
1824
1825 /*
1826  * Manufacturer-specific quirks. Add workarounds for geometry
1827  * reversal, etc. here.
1828  */
1829 static void flash_fixup_amd(flash_info_t *info, struct cfi_qry *qry)
1830 {
1831         /* check if flash geometry needs reversal */
1832         if (qry->num_erase_regions > 1) {
1833                 /* reverse geometry if top boot part */
1834                 if (info->cfi_version < 0x3131) {
1835                         /* CFI < 1.1, try to guess from device id */
1836                         if ((info->device_id & 0x80) != 0)
1837                                 cfi_reverse_geometry(qry);
1838                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
1839                         /* CFI >= 1.1, deduct from top/bottom flag */
1840                         /* note: ext_addr is valid since cfi_version > 0 */
1841                         cfi_reverse_geometry(qry);
1842                 }
1843         }
1844 }
1845
1846 static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
1847 {
1848         int reverse_geometry = 0;
1849
1850         /* Check the "top boot" bit in the PRI */
1851         if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1))
1852                 reverse_geometry = 1;
1853
1854         /* AT49BV6416(T) list the erase regions in the wrong order.
1855          * However, the device ID is identical with the non-broken
1856          * AT49BV642D they differ in the high byte.
1857          */
1858         if (info->device_id == 0xd6 || info->device_id == 0xd2)
1859                 reverse_geometry = !reverse_geometry;
1860
1861         if (reverse_geometry)
1862                 cfi_reverse_geometry(qry);
1863 }
1864
1865 static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
1866 {
1867         /* check if flash geometry needs reversal */
1868         if (qry->num_erase_regions > 1) {
1869                 /* reverse geometry if top boot part */
1870                 if (info->cfi_version < 0x3131) {
1871                         /* CFI < 1.1, guess by device id */
1872                         if (info->device_id == 0x22CA || /* M29W320DT */
1873                             info->device_id == 0x2256 || /* M29W320ET */
1874                             info->device_id == 0x22D7) { /* M29W800DT */
1875                                 cfi_reverse_geometry(qry);
1876                         }
1877                 }
1878         }
1879 }
1880
1881 /*
1882  * The following code cannot be run from FLASH!
1883  *
1884  */
1885 ulong flash_get_size (phys_addr_t base, int banknum)
1886 {
1887         flash_info_t *info = &flash_info[banknum];
1888         int i, j;
1889         flash_sect_t sect_cnt;
1890         phys_addr_t sector;
1891         unsigned long tmp;
1892         int size_ratio;
1893         uchar num_erase_regions;
1894         int erase_region_size;
1895         int erase_region_count;
1896         struct cfi_qry qry;
1897         unsigned long max_size;
1898
1899         memset(&qry, 0, sizeof(qry));
1900
1901         info->ext_addr = 0;
1902         info->cfi_version = 0;
1903 #ifdef CONFIG_SYS_FLASH_PROTECTION
1904         info->legacy_unlock = 0;
1905 #endif
1906
1907         info->start[0] = (ulong)map_physmem(base, info->portwidth, MAP_NOCACHE);
1908
1909         if (flash_detect_cfi (info, &qry)) {
1910                 info->vendor = le16_to_cpu(qry.p_id);
1911                 info->ext_addr = le16_to_cpu(qry.p_adr);
1912                 num_erase_regions = qry.num_erase_regions;
1913
1914                 if (info->ext_addr) {
1915                         info->cfi_version = (ushort) flash_read_uchar (info,
1916                                                 info->ext_addr + 3) << 8;
1917                         info->cfi_version |= (ushort) flash_read_uchar (info,
1918                                                 info->ext_addr + 4);
1919                 }
1920
1921 #ifdef DEBUG
1922                 flash_printqry (&qry);
1923 #endif
1924
1925                 switch (info->vendor) {
1926                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1927                 case CFI_CMDSET_INTEL_STANDARD:
1928                 case CFI_CMDSET_INTEL_EXTENDED:
1929                         cmdset_intel_init(info, &qry);
1930                         break;
1931                 case CFI_CMDSET_AMD_STANDARD:
1932                 case CFI_CMDSET_AMD_EXTENDED:
1933                         cmdset_amd_init(info, &qry);
1934                         break;
1935                 default:
1936                         printf("CFI: Unknown command set 0x%x\n",
1937                                         info->vendor);
1938                         /*
1939                          * Unfortunately, this means we don't know how
1940                          * to get the chip back to Read mode. Might
1941                          * as well try an Intel-style reset...
1942                          */
1943                         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1944                         return 0;
1945                 }
1946
1947                 /* Do manufacturer-specific fixups */
1948                 switch (info->manufacturer_id) {
1949                 case 0x0001: /* AMD */
1950                 case 0x0037: /* AMIC */
1951                         flash_fixup_amd(info, &qry);
1952                         break;
1953                 case 0x001f:
1954                         flash_fixup_atmel(info, &qry);
1955                         break;
1956                 case 0x0020:
1957                         flash_fixup_stm(info, &qry);
1958                         break;
1959                 }
1960
1961                 debug ("manufacturer is %d\n", info->vendor);
1962                 debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
1963                 debug ("device id is 0x%x\n", info->device_id);
1964                 debug ("device id2 is 0x%x\n", info->device_id2);
1965                 debug ("cfi version is 0x%04x\n", info->cfi_version);
1966
1967                 size_ratio = info->portwidth / info->chipwidth;
1968                 /* if the chip is x8/x16 reduce the ratio by half */
1969                 if ((info->interface == FLASH_CFI_X8X16)
1970                     && (info->chipwidth == FLASH_CFI_BY8)) {
1971                         size_ratio >>= 1;
1972                 }
1973                 debug ("size_ratio %d port %d bits chip %d bits\n",
1974                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1975                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1976                 info->size = 1 << qry.dev_size;
1977                 /* multiply the size by the number of chips */
1978                 info->size *= size_ratio;
1979                 max_size = cfi_flash_bank_size(banknum);
1980                 if (max_size && (info->size > max_size)) {
1981                         debug("[truncated from %ldMiB]", info->size >> 20);
1982                         info->size = max_size;
1983                 }
1984                 debug ("found %d erase regions\n", num_erase_regions);
1985                 sect_cnt = 0;
1986                 sector = base;
1987                 for (i = 0; i < num_erase_regions; i++) {
1988                         if (i > NUM_ERASE_REGIONS) {
1989                                 printf ("%d erase regions found, only %d used\n",
1990                                         num_erase_regions, NUM_ERASE_REGIONS);
1991                                 break;
1992                         }
1993
1994                         tmp = le32_to_cpu(qry.erase_region_info[i]);
1995                         debug("erase region %u: 0x%08lx\n", i, tmp);
1996
1997                         erase_region_count = (tmp & 0xffff) + 1;
1998                         tmp >>= 16;
1999                         erase_region_size =
2000                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
2001                         debug ("erase_region_count = %d erase_region_size = %d\n",
2002                                 erase_region_count, erase_region_size);
2003                         for (j = 0; j < erase_region_count; j++) {
2004                                 if (sector - base >= info->size)
2005                                         break;
2006                                 if (sect_cnt >= CONFIG_SYS_MAX_FLASH_SECT) {
2007                                         printf("ERROR: too many flash sectors\n");
2008                                         break;
2009                                 }
2010                                 info->start[sect_cnt] =
2011                                         (ulong)map_physmem(sector,
2012                                                            info->portwidth,
2013                                                            MAP_NOCACHE);
2014                                 sector += (erase_region_size * size_ratio);
2015
2016                                 /*
2017                                  * Only read protection status from
2018                                  * supported devices (intel...)
2019                                  */
2020                                 switch (info->vendor) {
2021                                 case CFI_CMDSET_INTEL_PROG_REGIONS:
2022                                 case CFI_CMDSET_INTEL_EXTENDED:
2023                                 case CFI_CMDSET_INTEL_STANDARD:
2024                                         /*
2025                                          * Set flash to read-id mode. Otherwise
2026                                          * reading protected status is not
2027                                          * guaranteed.
2028                                          */
2029                                         flash_write_cmd(info, sect_cnt, 0,
2030                                                         FLASH_CMD_READ_ID);
2031                                         info->protect[sect_cnt] =
2032                                                 flash_isset (info, sect_cnt,
2033                                                              FLASH_OFFSET_PROTECT,
2034                                                              FLASH_STATUS_PROTECT);
2035                                         break;
2036                                 default:
2037                                         /* default: not protected */
2038                                         info->protect[sect_cnt] = 0;
2039                                 }
2040
2041                                 sect_cnt++;
2042                         }
2043                 }
2044
2045                 info->sector_count = sect_cnt;
2046                 info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
2047                 tmp = 1 << qry.block_erase_timeout_typ;
2048                 info->erase_blk_tout = tmp *
2049                         (1 << qry.block_erase_timeout_max);
2050                 tmp = (1 << qry.buf_write_timeout_typ) *
2051                         (1 << qry.buf_write_timeout_max);
2052
2053                 /* round up when converting to ms */
2054                 info->buffer_write_tout = (tmp + 999) / 1000;
2055                 tmp = (1 << qry.word_write_timeout_typ) *
2056                         (1 << qry.word_write_timeout_max);
2057                 /* round up when converting to ms */
2058                 info->write_tout = (tmp + 999) / 1000;
2059                 info->flash_id = FLASH_MAN_CFI;
2060                 if ((info->interface == FLASH_CFI_X8X16) &&
2061                     (info->chipwidth == FLASH_CFI_BY8)) {
2062                         /* XXX - Need to test on x8/x16 in parallel. */
2063                         info->portwidth >>= 1;
2064                 }
2065
2066                 flash_write_cmd (info, 0, 0, info->cmd_reset);
2067         }
2068
2069         return (info->size);
2070 }
2071
2072 #ifdef CONFIG_FLASH_CFI_MTD
2073 void flash_set_verbose(uint v)
2074 {
2075         flash_verbose = v;
2076 }
2077 #endif
2078
2079 static void cfi_flash_set_config_reg(u32 base, u16 val)
2080 {
2081 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
2082         /*
2083          * Only set this config register if really defined
2084          * to a valid value (0xffff is invalid)
2085          */
2086         if (val == 0xffff)
2087                 return;
2088
2089         /*
2090          * Set configuration register. Data is "encrypted" in the 16 lower
2091          * address bits.
2092          */
2093         flash_write16(FLASH_CMD_SETUP, (void *)(base + (val << 1)));
2094         flash_write16(FLASH_CMD_SET_CR_CONFIRM, (void *)(base + (val << 1)));
2095
2096         /*
2097          * Finally issue reset-command to bring device back to
2098          * read-array mode
2099          */
2100         flash_write16(FLASH_CMD_RESET, (void *)base);
2101 #endif
2102 }
2103
2104 /*-----------------------------------------------------------------------
2105  */
2106
2107 void flash_protect_default(void)
2108 {
2109 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2110         int i;
2111         struct apl_s {
2112                 ulong start;
2113                 ulong size;
2114         } apl[] = CONFIG_SYS_FLASH_AUTOPROTECT_LIST;
2115 #endif
2116
2117         /* Monitor protection ON by default */
2118 #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) && \
2119         (!defined(CONFIG_MONITOR_IS_IN_RAM))
2120         flash_protect(FLAG_PROTECT_SET,
2121                        CONFIG_SYS_MONITOR_BASE,
2122                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len  - 1,
2123                        flash_get_info(CONFIG_SYS_MONITOR_BASE));
2124 #endif
2125
2126         /* Environment protection ON by default */
2127 #ifdef CONFIG_ENV_IS_IN_FLASH
2128         flash_protect(FLAG_PROTECT_SET,
2129                        CONFIG_ENV_ADDR,
2130                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
2131                        flash_get_info(CONFIG_ENV_ADDR));
2132 #endif
2133
2134         /* Redundant environment protection ON by default */
2135 #ifdef CONFIG_ENV_ADDR_REDUND
2136         flash_protect(FLAG_PROTECT_SET,
2137                        CONFIG_ENV_ADDR_REDUND,
2138                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
2139                        flash_get_info(CONFIG_ENV_ADDR_REDUND));
2140 #endif
2141
2142 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2143         for (i = 0; i < (sizeof(apl) / sizeof(struct apl_s)); i++) {
2144                 debug("autoprotecting from %08x to %08x\n",
2145                       apl[i].start, apl[i].start + apl[i].size - 1);
2146                 flash_protect(FLAG_PROTECT_SET,
2147                                apl[i].start,
2148                                apl[i].start + apl[i].size - 1,
2149                                flash_get_info(apl[i].start));
2150         }
2151 #endif
2152 }
2153
2154 unsigned long flash_init (void)
2155 {
2156         unsigned long size = 0;
2157         int i;
2158
2159 #ifdef CONFIG_SYS_FLASH_PROTECTION
2160         /* read environment from EEPROM */
2161         char s[64];
2162         getenv_f("unlock", s, sizeof(s));
2163 #endif
2164
2165         /* Init: no FLASHes known */
2166         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
2167                 flash_info[i].flash_id = FLASH_UNKNOWN;
2168
2169                 /* Optionally write flash configuration register */
2170                 cfi_flash_set_config_reg(cfi_flash_bank_addr(i),
2171                                          cfi_flash_config_reg(i));
2172
2173                 if (!flash_detect_legacy(cfi_flash_bank_addr(i), i))
2174                         flash_get_size(cfi_flash_bank_addr(i), i);
2175                 size += flash_info[i].size;
2176                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
2177 #ifndef CONFIG_SYS_FLASH_QUIET_TEST
2178                         printf ("## Unknown flash on Bank %d "
2179                                 "- Size = 0x%08lx = %ld MB\n",
2180                                 i+1, flash_info[i].size,
2181                                 flash_info[i].size >> 20);
2182 #endif /* CONFIG_SYS_FLASH_QUIET_TEST */
2183                 }
2184 #ifdef CONFIG_SYS_FLASH_PROTECTION
2185                 else if ((s != NULL) && (strcmp(s, "yes") == 0)) {
2186                         /*
2187                          * Only the U-Boot image and it's environment
2188                          * is protected, all other sectors are
2189                          * unprotected (unlocked) if flash hardware
2190                          * protection is used (CONFIG_SYS_FLASH_PROTECTION)
2191                          * and the environment variable "unlock" is
2192                          * set to "yes".
2193                          */
2194                         if (flash_info[i].legacy_unlock) {
2195                                 int k;
2196
2197                                 /*
2198                                  * Disable legacy_unlock temporarily,
2199                                  * since flash_real_protect would
2200                                  * relock all other sectors again
2201                                  * otherwise.
2202                                  */
2203                                 flash_info[i].legacy_unlock = 0;
2204
2205                                 /*
2206                                  * Legacy unlocking (e.g. Intel J3) ->
2207                                  * unlock only one sector. This will
2208                                  * unlock all sectors.
2209                                  */
2210                                 flash_real_protect (&flash_info[i], 0, 0);
2211
2212                                 flash_info[i].legacy_unlock = 1;
2213
2214                                 /*
2215                                  * Manually mark other sectors as
2216                                  * unlocked (unprotected)
2217                                  */
2218                                 for (k = 1; k < flash_info[i].sector_count; k++)
2219                                         flash_info[i].protect[k] = 0;
2220                         } else {
2221                                 /*
2222                                  * No legancy unlocking -> unlock all sectors
2223                                  */
2224                                 flash_protect (FLAG_PROTECT_CLEAR,
2225                                                flash_info[i].start[0],
2226                                                flash_info[i].start[0]
2227                                                + flash_info[i].size - 1,
2228                                                &flash_info[i]);
2229                         }
2230                 }
2231 #endif /* CONFIG_SYS_FLASH_PROTECTION */
2232         }
2233
2234         flash_protect_default();
2235 #ifdef CONFIG_FLASH_CFI_MTD
2236         cfi_mtd_init();
2237 #endif
2238
2239         return (size);
2240 }