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                         return ERR_TIMOUT;
 585                 }
 586                 udelay (1);             /* also triggers watchdog */
 587         }
 588         return ERR_OK;
 589 }
 590
 591 /*-----------------------------------------------------------------------
 592  * Wait for XSR.7 to be set, if it times out print an error, otherwise
 593  * do a full status check.
 594  *
 595  * This routine sets the flash to read-array mode.
 596  */
 597 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 598                                     ulong tout, char *prompt)
 599 {
 600         int retcode;
 601
 602         retcode = flash_status_check (info, sector, tout, prompt);
 603         switch (info->vendor) {
 604         case CFI_CMDSET_INTEL_PROG_REGIONS:
 605         case CFI_CMDSET_INTEL_EXTENDED:
 606         case CFI_CMDSET_INTEL_STANDARD:
 607                 if ((retcode != ERR_OK)
 608                     && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 609                         retcode = ERR_INVAL;
 610                         printf ("Flash %s error at address %lx\n", prompt,
 611                                 info->start[sector]);
 612                         if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS |
 613                                          FLASH_STATUS_PSLBS)) {
 614                                 puts ("Command Sequence Error.\n");
 615                         } else if (flash_isset (info, sector, 0,
 616                                                 FLASH_STATUS_ECLBS)) {
 617                                 puts ("Block Erase Error.\n");
 618                                 retcode = ERR_NOT_ERASED;
 619                         } else if (flash_isset (info, sector, 0,
 620                                                 FLASH_STATUS_PSLBS)) {
 621                                 puts ("Locking Error\n");
 622                         }
 623                         if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
 624                                 puts ("Block locked.\n");
 625                                 retcode = ERR_PROTECTED;
 626                         }
 627                         if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
 628                                 puts ("Vpp Low Error.\n");
 629                 }
 630                 flash_write_cmd (info, sector, 0, info->cmd_reset);
 631                 break;
 632         default:
 633                 break;
 634         }
 635         return retcode;
 636 }
 637
 638 static int use_flash_status_poll(flash_info_t *info)
 639 {
 640 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 641         if (info->vendor == CFI_CMDSET_AMD_EXTENDED ||
 642             info->vendor == CFI_CMDSET_AMD_STANDARD)
 643                 return 1;
 644 #endif
 645         return 0;
 646 }
 647
 648 static int flash_status_poll(flash_info_t *info, void *src, void *dst,
 649                              ulong tout, char *prompt)
 650 {
 651 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 652         ulong start;
 653         int ready;
 654
 655 #if CONFIG_SYS_HZ != 1000
 656         if ((ulong)CONFIG_SYS_HZ > 100000)
 657                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 658         else
 659                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 660 #endif
 661
 662         /* Wait for command completion */
 663         reset_timer();
 664         start = get_timer(0);
 665         while (1) {
 666                 switch (info->portwidth) {
 667                 case FLASH_CFI_8BIT:
 668                         ready = flash_read8(dst) == flash_read8(src);
 669                         break;
 670                 case FLASH_CFI_16BIT:
 671                         ready = flash_read16(dst) == flash_read16(src);
 672                         break;
 673                 case FLASH_CFI_32BIT:
 674                         ready = flash_read32(dst) == flash_read32(src);
 675                         break;
 676                 case FLASH_CFI_64BIT:
 677                         ready = flash_read64(dst) == flash_read64(src);
 678                         break;
 679                 default:
 680                         ready = 0;
 681                         break;
 682                 }
 683                 if (ready)
 684                         break;
 685                 if (get_timer(start) > tout) {
 686                         printf("Flash %s timeout at address %lx data %lx\n",
 687                                prompt, (ulong)dst, (ulong)flash_read8(dst));
 688                         return ERR_TIMOUT;
 689                 }
 690                 udelay(1);              /* also triggers watchdog */
 691         }
 692 #endif /* CONFIG_SYS_CFI_FLASH_STATUS_POLL */
 693         return ERR_OK;
 694 }
 695
 696 /*-----------------------------------------------------------------------
 697  */
 698 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 699 {
 700 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 701         unsigned short  w;
 702         unsigned int    l;
 703         unsigned long long ll;
 704 #endif
 705
 706         switch (info->portwidth) {
 707         case FLASH_CFI_8BIT:
 708                 cword->c = c;
 709                 break;
 710         case FLASH_CFI_16BIT:
 711 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 712                 w = c;
 713                 w <<= 8;
 714                 cword->w = (cword->w >> 8) | w;
 715 #else
 716                 cword->w = (cword->w << 8) | c;
 717 #endif
 718                 break;
 719         case FLASH_CFI_32BIT:
 720 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 721                 l = c;
 722                 l <<= 24;
 723                 cword->l = (cword->l >> 8) | l;
 724 #else
 725                 cword->l = (cword->l << 8) | c;
 726 #endif
 727                 break;
 728         case FLASH_CFI_64BIT:
 729 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 730                 ll = c;
 731                 ll <<= 56;
 732                 cword->ll = (cword->ll >> 8) | ll;
 733 #else
 734                 cword->ll = (cword->ll << 8) | c;
 735 #endif
 736                 break;
 737         }
 738 }
 739
 740 /*
 741  * Loop through the sector table starting from the previously found sector.
 742  * Searches forwards or backwards, dependent on the passed address.
 743  */
 744 static flash_sect_t find_sector (flash_info_t * info, ulong addr)
 745 {
 746         static flash_sect_t saved_sector = 0; /* previously found sector */
 747         static flash_info_t *saved_info = 0; /* previously used flash bank */
 748         flash_sect_t sector = saved_sector;
 749
 750         if ((info != saved_info) || (sector >= info->sector_count))
 751                 sector = 0;
 752
 753         while ((info->start[sector] < addr)
 754                         && (sector < info->sector_count - 1))
 755                 sector++;
 756         while ((info->start[sector] > addr) && (sector > 0))
 757                 /*
 758                  * also decrements the sector in case of an overshot
 759                  * in the first loop
 760                  */
 761                 sector--;
 762
 763         saved_sector = sector;
 764         saved_info = info;
 765         return sector;
 766 }
 767
 768 /*-----------------------------------------------------------------------
 769  */
 770 static int flash_write_cfiword (flash_info_t * info, ulong dest,
 771                                 cfiword_t cword)
 772 {
 773         void *dstaddr = (void *)dest;
 774         int flag;
 775         flash_sect_t sect = 0;
 776         char sect_found = 0;
 777
 778         /* Check if Flash is (sufficiently) erased */
 779         switch (info->portwidth) {
 780         case FLASH_CFI_8BIT:
 781                 flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
 782                 break;
 783         case FLASH_CFI_16BIT:
 784                 flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
 785                 break;
 786         case FLASH_CFI_32BIT:
 787                 flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
 788                 break;
 789         case FLASH_CFI_64BIT:
 790                 flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
 791                 break;
 792         default:
 793                 flag = 0;
 794                 break;
 795         }
 796         if (!flag)
 797                 return ERR_NOT_ERASED;
 798
 799         /* Disable interrupts which might cause a timeout here */
 800         flag = disable_interrupts ();
 801
 802         switch (info->vendor) {
 803         case CFI_CMDSET_INTEL_PROG_REGIONS:
 804         case CFI_CMDSET_INTEL_EXTENDED:
 805         case CFI_CMDSET_INTEL_STANDARD:
 806                 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
 807                 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
 808                 break;
 809         case CFI_CMDSET_AMD_EXTENDED:
 810         case CFI_CMDSET_AMD_STANDARD:
 811                 sect = find_sector(info, dest);
 812                 flash_unlock_seq (info, sect);
 813                 flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE);
 814                 sect_found = 1;
 815                 break;
 816 #ifdef CONFIG_FLASH_CFI_LEGACY
 817         case CFI_CMDSET_AMD_LEGACY:
 818                 sect = find_sector(info, dest);
 819                 flash_unlock_seq (info, 0);
 820                 flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_WRITE);
 821                 sect_found = 1;
 822                 break;
 823 #endif
 824         }
 825
 826         switch (info->portwidth) {
 827         case FLASH_CFI_8BIT:
 828                 flash_write8(cword.c, dstaddr);
 829                 break;
 830         case FLASH_CFI_16BIT:
 831                 flash_write16(cword.w, dstaddr);
 832                 break;
 833         case FLASH_CFI_32BIT:
 834                 flash_write32(cword.l, dstaddr);
 835                 break;
 836         case FLASH_CFI_64BIT:
 837                 flash_write64(cword.ll, dstaddr);
 838                 break;
 839         }
 840
 841         /* re-enable interrupts if necessary */
 842         if (flag)
 843                 enable_interrupts ();
 844
 845         if (!sect_found)
 846                 sect = find_sector (info, dest);
 847
 848         if (use_flash_status_poll(info))
 849                 return flash_status_poll(info, &cword, dstaddr,
 850                                          info->write_tout, "write");
 851         else
 852                 return flash_full_status_check(info, sect,
 853                                                info->write_tout, "write");
 854 }
 855
 856 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 857
 858 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
 859                                   int len)
 860 {
 861         flash_sect_t sector;
 862         int cnt;
 863         int retcode;
 864         void *src = cp;
 865         void *dst = (void *)dest;
 866         void *dst2 = dst;
 867         int flag = 0;
 868         uint offset = 0;
 869         unsigned int shift;
 870         uchar write_cmd;
 871
 872         switch (info->portwidth) {
 873         case FLASH_CFI_8BIT:
 874                 shift = 0;
 875                 break;
 876         case FLASH_CFI_16BIT:
 877                 shift = 1;
 878                 break;
 879         case FLASH_CFI_32BIT:
 880                 shift = 2;
 881                 break;
 882         case FLASH_CFI_64BIT:
 883                 shift = 3;
 884                 break;
 885         default:
 886                 retcode = ERR_INVAL;
 887                 goto out_unmap;
 888         }
 889
 890         cnt = len >> shift;
 891
 892         while ((cnt-- > 0) && (flag == 0)) {
 893                 switch (info->portwidth) {
 894                 case FLASH_CFI_8BIT:
 895                         flag = ((flash_read8(dst2) & flash_read8(src)) ==
 896                                 flash_read8(src));
 897                         src += 1, dst2 += 1;
 898                         break;
 899                 case FLASH_CFI_16BIT:
 900                         flag = ((flash_read16(dst2) & flash_read16(src)) ==
 901                                 flash_read16(src));
 902                         src += 2, dst2 += 2;
 903                         break;
 904                 case FLASH_CFI_32BIT:
 905                         flag = ((flash_read32(dst2) & flash_read32(src)) ==
 906                                 flash_read32(src));
 907                         src += 4, dst2 += 4;
 908                         break;
 909                 case FLASH_CFI_64BIT:
 910                         flag = ((flash_read64(dst2) & flash_read64(src)) ==
 911                                 flash_read64(src));
 912                         src += 8, dst2 += 8;
 913                         break;
 914                 }
 915         }
 916         if (!flag) {
 917                 retcode = ERR_NOT_ERASED;
 918                 goto out_unmap;
 919         }
 920
 921         src = cp;
 922         sector = find_sector (info, dest);
 923
 924         switch (info->vendor) {
 925         case CFI_CMDSET_INTEL_PROG_REGIONS:
 926         case CFI_CMDSET_INTEL_STANDARD:
 927         case CFI_CMDSET_INTEL_EXTENDED:
 928                 write_cmd = (info->vendor == CFI_CMDSET_INTEL_PROG_REGIONS) ?
 929                                         FLASH_CMD_WRITE_BUFFER_PROG : FLASH_CMD_WRITE_TO_BUFFER;
 930                 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 931                 flash_write_cmd (info, sector, 0, FLASH_CMD_READ_STATUS);
 932                 flash_write_cmd (info, sector, 0, write_cmd);
 933                 retcode = flash_status_check (info, sector,
 934                                               info->buffer_write_tout,
 935                                               "write to buffer");
 936                 if (retcode == ERR_OK) {
 937                         /* reduce the number of loops by the width of
 938                          * the port */
 939                         cnt = len >> shift;
 940                         flash_write_cmd (info, sector, 0, cnt - 1);
 941                         while (cnt-- > 0) {
 942                                 switch (info->portwidth) {
 943                                 case FLASH_CFI_8BIT:
 944                                         flash_write8(flash_read8(src), dst);
 945                                         src += 1, dst += 1;
 946                                         break;
 947                                 case FLASH_CFI_16BIT:
 948                                         flash_write16(flash_read16(src), dst);
 949                                         src += 2, dst += 2;
 950                                         break;
 951                                 case FLASH_CFI_32BIT:
 952                                         flash_write32(flash_read32(src), dst);
 953                                         src += 4, dst += 4;
 954                                         break;
 955                                 case FLASH_CFI_64BIT:
 956                                         flash_write64(flash_read64(src), dst);
 957                                         src += 8, dst += 8;
 958                                         break;
 959                                 default:
 960                                         retcode = ERR_INVAL;
 961                                         goto out_unmap;
 962                                 }
 963                         }
 964                         flash_write_cmd (info, sector, 0,
 965                                          FLASH_CMD_WRITE_BUFFER_CONFIRM);
 966                         retcode = flash_full_status_check (
 967                                 info, sector, info->buffer_write_tout,
 968                                 "buffer write");
 969                 }
 970
 971                 break;
 972
 973         case CFI_CMDSET_AMD_STANDARD:
 974         case CFI_CMDSET_AMD_EXTENDED:
 975                 flash_unlock_seq(info,0);
 976
 977 #ifdef CONFIG_FLASH_SPANSION_S29WS_N
 978                 offset = ((unsigned long)dst - info->start[sector]) >> shift;
 979 #endif
 980                 flash_write_cmd(info, sector, offset, AMD_CMD_WRITE_TO_BUFFER);
 981                 cnt = len >> shift;
 982                 flash_write_cmd(info, sector, offset, cnt - 1);
 983
 984                 switch (info->portwidth) {
 985                 case FLASH_CFI_8BIT:
 986                         while (cnt-- > 0) {
 987                                 flash_write8(flash_read8(src), dst);
 988                                 src += 1, dst += 1;
 989                         }
 990                         break;
 991                 case FLASH_CFI_16BIT:
 992                         while (cnt-- > 0) {
 993                                 flash_write16(flash_read16(src), dst);
 994                                 src += 2, dst += 2;
 995                         }
 996                         break;
 997                 case FLASH_CFI_32BIT:
 998                         while (cnt-- > 0) {
 999                                 flash_write32(flash_read32(src), dst);
1000                                 src += 4, dst += 4;
1001                         }
1002                         break;
1003                 case FLASH_CFI_64BIT:
1004                         while (cnt-- > 0) {
1005                                 flash_write64(flash_read64(src), dst);
1006                                 src += 8, dst += 8;
1007                         }
1008                         break;
1009                 default:
1010                         retcode = ERR_INVAL;
1011                         goto out_unmap;
1012                 }
1013
1014                 flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
1015                 if (use_flash_status_poll(info))
1016                         retcode = flash_status_poll(info, src - (1 << shift),
1017                                                     dst - (1 << shift),
1018                                                     info->buffer_write_tout,
1019                                                     "buffer write");
1020                 else
1021                         retcode = flash_full_status_check(info, sector,
1022                                                           info->buffer_write_tout,
1023                                                           "buffer write");
1024                 break;
1025
1026         default:
1027                 debug ("Unknown Command Set\n");
1028                 retcode = ERR_INVAL;
1029                 break;
1030         }
1031
1032 out_unmap:
1033         return retcode;
1034 }
1035 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1036
1037
1038 /*-----------------------------------------------------------------------
1039  */
1040 int flash_erase (flash_info_t * info, int s_first, int s_last)
1041 {
1042         int rcode = 0;
1043         int prot;
1044         flash_sect_t sect;
1045         int st;
1046
1047         if (info->flash_id != FLASH_MAN_CFI) {
1048                 puts ("Can't erase unknown flash type - aborted\n");
1049                 return 1;
1050         }
1051         if ((s_first < 0) || (s_first > s_last)) {
1052                 puts ("- no sectors to erase\n");
1053                 return 1;
1054         }
1055
1056         prot = 0;
1057         for (sect = s_first; sect <= s_last; ++sect) {
1058                 if (info->protect[sect]) {
1059                         prot++;
1060                 }
1061         }
1062         if (prot) {
1063                 printf ("- Warning: %d protected sectors will not be erased!\n",
1064                         prot);
1065         } else if (flash_verbose) {
1066                 putc ('\n');
1067         }
1068
1069
1070         for (sect = s_first; sect <= s_last; sect++) {
1071                 if (info->protect[sect] == 0) { /* not protected */
1072                         switch (info->vendor) {
1073                         case CFI_CMDSET_INTEL_PROG_REGIONS:
1074                         case CFI_CMDSET_INTEL_STANDARD:
1075                         case CFI_CMDSET_INTEL_EXTENDED:
1076                                 flash_write_cmd (info, sect, 0,
1077                                                  FLASH_CMD_CLEAR_STATUS);
1078                                 flash_write_cmd (info, sect, 0,
1079                                                  FLASH_CMD_BLOCK_ERASE);
1080                                 flash_write_cmd (info, sect, 0,
1081                                                  FLASH_CMD_ERASE_CONFIRM);
1082                                 break;
1083                         case CFI_CMDSET_AMD_STANDARD:
1084                         case CFI_CMDSET_AMD_EXTENDED:
1085                                 flash_unlock_seq (info, sect);
1086                                 flash_write_cmd (info, sect,
1087                                                 info->addr_unlock1,
1088                                                 AMD_CMD_ERASE_START);
1089                                 flash_unlock_seq (info, sect);
1090                                 flash_write_cmd (info, sect, 0,
1091                                                  AMD_CMD_ERASE_SECTOR);
1092                                 break;
1093 #ifdef CONFIG_FLASH_CFI_LEGACY
1094                         case CFI_CMDSET_AMD_LEGACY:
1095                                 flash_unlock_seq (info, 0);
1096                                 flash_write_cmd (info, 0, info->addr_unlock1,
1097                                                 AMD_CMD_ERASE_START);
1098                                 flash_unlock_seq (info, 0);
1099                                 flash_write_cmd (info, sect, 0,
1100                                                 AMD_CMD_ERASE_SECTOR);
1101                                 break;
1102 #endif
1103                         default:
1104                                 debug ("Unkown flash vendor %d\n",
1105                                        info->vendor);
1106                                 break;
1107                         }
1108
1109                         if (use_flash_status_poll(info)) {
1110                                 cfiword_t cword = (cfiword_t)0xffffffffffffffffULL;
1111                                 void *dest;
1112                                 dest = flash_map(info, sect, 0);
1113                                 st = flash_status_poll(info, &cword, dest,
1114                                                        info->erase_blk_tout, "erase");
1115                                 flash_unmap(info, sect, 0, dest);
1116                         } else
1117                                 st = flash_full_status_check(info, sect,
1118                                                              info->erase_blk_tout,
1119                                                              "erase");
1120                         if (st)
1121                                 rcode = 1;
1122                         else if (flash_verbose)
1123                                 putc ('.');
1124                 }
1125         }
1126
1127         if (flash_verbose)
1128                 puts (" done\n");
1129
1130         return rcode;
1131 }
1132
1133 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1134 static int sector_erased(flash_info_t *info, int i)
1135 {
1136         int k;
1137         int size;
1138         u32 *flash;
1139
1140         /*
1141          * Check if whole sector is erased
1142          */
1143         size = flash_sector_size(info, i);
1144         flash = (u32 *)info->start[i];
1145         /* divide by 4 for longword access */
1146         size = size >> 2;
1147
1148         for (k = 0; k < size; k++) {
1149                 if (flash_read32(flash++) != 0xffffffff)
1150                         return 0;       /* not erased */
1151         }
1152
1153         return 1;                       /* erased */
1154 }
1155 #endif /* CONFIG_SYS_FLASH_EMPTY_INFO */
1156
1157 void flash_print_info (flash_info_t * info)
1158 {
1159         int i;
1160
1161         if (info->flash_id != FLASH_MAN_CFI) {
1162                 puts ("missing or unknown FLASH type\n");
1163                 return;
1164         }
1165
1166         printf ("%s flash (%d x %d)",
1167                 info->name,
1168                 (info->portwidth << 3), (info->chipwidth << 3));
1169         if (info->size < 1024*1024)
1170                 printf ("  Size: %ld kB in %d Sectors\n",
1171                         info->size >> 10, info->sector_count);
1172         else
1173                 printf ("  Size: %ld MB in %d Sectors\n",
1174                         info->size >> 20, info->sector_count);
1175         printf ("  ");
1176         switch (info->vendor) {
1177                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1178                         printf ("Intel Prog Regions");
1179                         break;
1180                 case CFI_CMDSET_INTEL_STANDARD:
1181                         printf ("Intel Standard");
1182                         break;
1183                 case CFI_CMDSET_INTEL_EXTENDED:
1184                         printf ("Intel Extended");
1185                         break;
1186                 case CFI_CMDSET_AMD_STANDARD:
1187                         printf ("AMD Standard");
1188                         break;
1189                 case CFI_CMDSET_AMD_EXTENDED:
1190                         printf ("AMD Extended");
1191                         break;
1192 #ifdef CONFIG_FLASH_CFI_LEGACY
1193                 case CFI_CMDSET_AMD_LEGACY:
1194                         printf ("AMD Legacy");
1195                         break;
1196 #endif
1197                 default:
1198                         printf ("Unknown (%d)", info->vendor);
1199                         break;
1200         }
1201         printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x",
1202                 info->manufacturer_id);
1203         printf (info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1204                 info->device_id);
1205         if (info->device_id == 0x7E) {
1206                 printf("%04X", info->device_id2);
1207         }
1208         printf ("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
1209                 info->erase_blk_tout,
1210                 info->write_tout);
1211         if (info->buffer_size > 1) {
1212                 printf ("  Buffer write timeout: %ld ms, "
1213                         "buffer size: %d bytes\n",
1214                 info->buffer_write_tout,
1215                 info->buffer_size);
1216         }
1217
1218         puts ("\n  Sector Start Addresses:");
1219         for (i = 0; i < info->sector_count; ++i) {
1220                 if (ctrlc())
1221                         break;
1222                 if ((i % 5) == 0)
1223                         putc('\n');
1224 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1225                 /* print empty and read-only info */
1226                 printf ("  %08lX %c %s ",
1227                         info->start[i],
1228                         sector_erased(info, i) ? 'E' : ' ',
1229                         info->protect[i] ? "RO" : "  ");
1230 #else   /* ! CONFIG_SYS_FLASH_EMPTY_INFO */
1231                 printf ("  %08lX   %s ",
1232                         info->start[i],
1233                         info->protect[i] ? "RO" : "  ");
1234 #endif
1235         }
1236         putc ('\n');
1237         return;
1238 }
1239
1240 /*-----------------------------------------------------------------------
1241  * This is used in a few places in write_buf() to show programming
1242  * progress.  Making it a function is nasty because it needs to do side
1243  * effect updates to digit and dots.  Repeated code is nasty too, so
1244  * we define it once here.
1245  */
1246 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1247 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub) \
1248         if (flash_verbose) { \
1249                 dots -= dots_sub; \
1250                 if ((scale > 0) && (dots <= 0)) { \
1251                         if ((digit % 5) == 0) \
1252                                 printf ("%d", digit / 5); \
1253                         else \
1254                                 putc ('.'); \
1255                         digit--; \
1256                         dots += scale; \
1257                 } \
1258         }
1259 #else
1260 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub)
1261 #endif
1262
1263 /*-----------------------------------------------------------------------
1264  * Copy memory to flash, returns:
1265  * 0 - OK
1266  * 1 - write timeout
1267  * 2 - Flash not erased
1268  */
1269 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
1270 {
1271         ulong wp;
1272         uchar *p;
1273         int aln;
1274         cfiword_t cword;
1275         int i, rc;
1276 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1277         int buffered_size;
1278 #endif
1279 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1280         int digit = CONFIG_FLASH_SHOW_PROGRESS;
1281         int scale = 0;
1282         int dots  = 0;
1283
1284         /*
1285          * Suppress if there are fewer than CONFIG_FLASH_SHOW_PROGRESS writes.
1286          */
1287         if (cnt >= CONFIG_FLASH_SHOW_PROGRESS) {
1288                 scale = (int)((cnt + CONFIG_FLASH_SHOW_PROGRESS - 1) /
1289                         CONFIG_FLASH_SHOW_PROGRESS);
1290         }
1291 #endif
1292
1293         /* get lower aligned address */
1294         wp = (addr & ~(info->portwidth - 1));
1295
1296         /* handle unaligned start */
1297         if ((aln = addr - wp) != 0) {
1298                 cword.l = 0;
1299                 p = (uchar *)wp;
1300                 for (i = 0; i < aln; ++i)
1301                         flash_add_byte (info, &cword, flash_read8(p + i));
1302
1303                 for (; (i < info->portwidth) && (cnt > 0); i++) {
1304                         flash_add_byte (info, &cword, *src++);
1305                         cnt--;
1306                 }
1307                 for (; (cnt == 0) && (i < info->portwidth); ++i)
1308                         flash_add_byte (info, &cword, flash_read8(p + i));
1309
1310                 rc = flash_write_cfiword (info, wp, cword);
1311                 if (rc != 0)
1312                         return rc;
1313
1314                 wp += i;
1315                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1316         }
1317
1318         /* handle the aligned part */
1319 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1320         buffered_size = (info->portwidth / info->chipwidth);
1321         buffered_size *= info->buffer_size;
1322         while (cnt >= info->portwidth) {
1323                 /* prohibit buffer write when buffer_size is 1 */
1324                 if (info->buffer_size == 1) {
1325                         cword.l = 0;
1326                         for (i = 0; i < info->portwidth; i++)
1327                                 flash_add_byte (info, &cword, *src++);
1328                         if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1329                                 return rc;
1330                         wp += info->portwidth;
1331                         cnt -= info->portwidth;
1332                         continue;
1333                 }
1334
1335                 /* write buffer until next buffered_size aligned boundary */
1336                 i = buffered_size - (wp % buffered_size);
1337                 if (i > cnt)
1338                         i = cnt;
1339                 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
1340                         return rc;
1341                 i -= i & (info->portwidth - 1);
1342                 wp += i;
1343                 src += i;
1344                 cnt -= i;
1345                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1346         }
1347 #else
1348         while (cnt >= info->portwidth) {
1349                 cword.l = 0;
1350                 for (i = 0; i < info->portwidth; i++) {
1351                         flash_add_byte (info, &cword, *src++);
1352                 }
1353                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1354                         return rc;
1355                 wp += info->portwidth;
1356                 cnt -= info->portwidth;
1357                 FLASH_SHOW_PROGRESS(scale, dots, digit, info->portwidth);
1358         }
1359 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1360
1361         if (cnt == 0) {
1362                 return (0);
1363         }
1364
1365         /*
1366          * handle unaligned tail bytes
1367          */
1368         cword.l = 0;
1369         p = (uchar *)wp;
1370         for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
1371                 flash_add_byte (info, &cword, *src++);
1372                 --cnt;
1373         }
1374         for (; i < info->portwidth; ++i)
1375                 flash_add_byte (info, &cword, flash_read8(p + i));
1376
1377         return flash_write_cfiword (info, wp, cword);
1378 }
1379
1380 /*-----------------------------------------------------------------------
1381  */
1382 #ifdef CONFIG_SYS_FLASH_PROTECTION
1383
1384 int flash_real_protect (flash_info_t * info, long sector, int prot)
1385 {
1386         int retcode = 0;
1387
1388         switch (info->vendor) {
1389                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1390                 case CFI_CMDSET_INTEL_STANDARD:
1391                 case CFI_CMDSET_INTEL_EXTENDED:
1392                         /*
1393                          * see errata called
1394                          * "Numonyx Axcell P33/P30 Specification Update" :)
1395                          */
1396                         flash_write_cmd (info, sector, 0, FLASH_CMD_READ_ID);
1397                         if (!flash_isequal (info, sector, FLASH_OFFSET_PROTECT,
1398                                             prot)) {
1399                                 /*
1400                                  * cmd must come before FLASH_CMD_PROTECT + 20us
1401                                  * Disable interrupts which might cause a timeout here.
1402                                  */
1403                                 int flag = disable_interrupts ();
1404                                 unsigned short cmd;
1405
1406                                 if (prot)
1407                                         cmd = FLASH_CMD_PROTECT_SET;
1408                                 else
1409                                         cmd = FLASH_CMD_PROTECT_CLEAR;
1410
1411                                 flash_write_cmd (info, sector, 0,
1412                                                   FLASH_CMD_PROTECT);
1413                                 flash_write_cmd (info, sector, 0, cmd);
1414                                 /* re-enable interrupts if necessary */
1415                                 if (flag)
1416                                         enable_interrupts ();
1417                         }
1418                         break;
1419                 case CFI_CMDSET_AMD_EXTENDED:
1420                 case CFI_CMDSET_AMD_STANDARD:
1421                         /* U-Boot only checks the first byte */
1422                         if (info->manufacturer_id == (uchar)ATM_MANUFACT) {
1423                                 if (prot) {
1424                                         flash_unlock_seq (info, 0);
1425                                         flash_write_cmd (info, 0,
1426                                                         info->addr_unlock1,
1427                                                         ATM_CMD_SOFTLOCK_START);
1428                                         flash_unlock_seq (info, 0);
1429                                         flash_write_cmd (info, sector, 0,
1430                                                         ATM_CMD_LOCK_SECT);
1431                                 } else {
1432                                         flash_write_cmd (info, 0,
1433                                                         info->addr_unlock1,
1434                                                         AMD_CMD_UNLOCK_START);
1435                                         if (info->device_id == ATM_ID_BV6416)
1436                                                 flash_write_cmd (info, sector,
1437                                                         0, ATM_CMD_UNLOCK_SECT);
1438                                 }
1439                         }
1440                         break;
1441 #ifdef CONFIG_FLASH_CFI_LEGACY
1442                 case CFI_CMDSET_AMD_LEGACY:
1443                         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1444                         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
1445                         if (prot)
1446                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
1447                         else
1448                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
1449 #endif
1450         };
1451
1452         /*
1453          * Flash needs to be in status register read mode for
1454          * flash_full_status_check() to work correctly
1455          */
1456         flash_write_cmd(info, sector, 0, FLASH_CMD_READ_STATUS);
1457         if ((retcode =
1458              flash_full_status_check (info, sector, info->erase_blk_tout,
1459                                       prot ? "protect" : "unprotect")) == 0) {
1460
1461                 info->protect[sector] = prot;
1462
1463                 /*
1464                  * On some of Intel's flash chips (marked via legacy_unlock)
1465                  * unprotect unprotects all locking.
1466                  */
1467                 if ((prot == 0) && (info->legacy_unlock)) {
1468                         flash_sect_t i;
1469
1470                         for (i = 0; i < info->sector_count; i++) {
1471                                 if (info->protect[i])
1472                                         flash_real_protect (info, i, 1);
1473                         }
1474                 }
1475         }
1476         return retcode;
1477 }
1478
1479 /*-----------------------------------------------------------------------
1480  * flash_read_user_serial - read the OneTimeProgramming cells
1481  */
1482 void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
1483                              int len)
1484 {
1485         uchar *src;
1486         uchar *dst;
1487
1488         dst = buffer;
1489         src = flash_map (info, 0, FLASH_OFFSET_USER_PROTECTION);
1490         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1491         memcpy (dst, src + offset, len);
1492         flash_write_cmd (info, 0, 0, info->cmd_reset);
1493         flash_unmap(info, 0, FLASH_OFFSET_USER_PROTECTION, src);
1494 }
1495
1496 /*
1497  * flash_read_factory_serial - read the device Id from the protection area
1498  */
1499 void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
1500                                 int len)
1501 {
1502         uchar *src;
1503
1504         src = flash_map (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
1505         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1506         memcpy (buffer, src + offset, len);
1507         flash_write_cmd (info, 0, 0, info->cmd_reset);
1508         flash_unmap(info, 0, FLASH_OFFSET_INTEL_PROTECTION, src);
1509 }
1510
1511 #endif /* CONFIG_SYS_FLASH_PROTECTION */
1512
1513 /*-----------------------------------------------------------------------
1514  * Reverse the order of the erase regions in the CFI QRY structure.
1515  * This is needed for chips that are either a) correctly detected as
1516  * top-boot, or b) buggy.
1517  */
1518 static void cfi_reverse_geometry(struct cfi_qry *qry)
1519 {
1520         unsigned int i, j;
1521         u32 tmp;
1522
1523         for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) {
1524                 tmp = qry->erase_region_info[i];
1525                 qry->erase_region_info[i] = qry->erase_region_info[j];
1526                 qry->erase_region_info[j] = tmp;
1527         }
1528 }
1529
1530 /*-----------------------------------------------------------------------
1531  * read jedec ids from device and set corresponding fields in info struct
1532  *
1533  * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
1534  *
1535  */
1536 static void cmdset_intel_read_jedec_ids(flash_info_t *info)
1537 {
1538         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1539         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1540         udelay(1000); /* some flash are slow to respond */
1541         info->manufacturer_id = flash_read_uchar (info,
1542                                         FLASH_OFFSET_MANUFACTURER_ID);
1543         info->device_id = (info->chipwidth == FLASH_CFI_16BIT) ?
1544                         flash_read_word (info, FLASH_OFFSET_DEVICE_ID) :
1545                         flash_read_uchar (info, FLASH_OFFSET_DEVICE_ID);
1546         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1547 }
1548
1549 static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry)
1550 {
1551         info->cmd_reset = FLASH_CMD_RESET;
1552
1553         cmdset_intel_read_jedec_ids(info);
1554         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1555
1556 #ifdef CONFIG_SYS_FLASH_PROTECTION
1557         /* read legacy lock/unlock bit from intel flash */
1558         if (info->ext_addr) {
1559                 info->legacy_unlock = flash_read_uchar (info,
1560                                 info->ext_addr + 5) & 0x08;
1561         }
1562 #endif
1563
1564         return 0;
1565 }
1566
1567 static void cmdset_amd_read_jedec_ids(flash_info_t *info)
1568 {
1569         ushort bankId = 0;
1570         uchar  manuId;
1571
1572         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1573         flash_unlock_seq(info, 0);
1574         flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
1575         udelay(1000); /* some flash are slow to respond */
1576
1577         manuId = flash_read_uchar (info, FLASH_OFFSET_MANUFACTURER_ID);
1578         /* JEDEC JEP106Z specifies ID codes up to bank 7 */
1579         while (manuId == FLASH_CONTINUATION_CODE && bankId < 0x800) {
1580                 bankId += 0x100;
1581                 manuId = flash_read_uchar (info,
1582                         bankId | FLASH_OFFSET_MANUFACTURER_ID);
1583         }
1584         info->manufacturer_id = manuId;
1585
1586         switch (info->chipwidth){
1587         case FLASH_CFI_8BIT:
1588                 info->device_id = flash_read_uchar (info,
1589                                                 FLASH_OFFSET_DEVICE_ID);
1590                 if (info->device_id == 0x7E) {
1591                         /* AMD 3-byte (expanded) device ids */
1592                         info->device_id2 = flash_read_uchar (info,
1593                                                 FLASH_OFFSET_DEVICE_ID2);
1594                         info->device_id2 <<= 8;
1595                         info->device_id2 |= flash_read_uchar (info,
1596                                                 FLASH_OFFSET_DEVICE_ID3);
1597                 }
1598                 break;
1599         case FLASH_CFI_16BIT:
1600                 info->device_id = flash_read_word (info,
1601                                                 FLASH_OFFSET_DEVICE_ID);
1602                 break;
1603         default:
1604                 break;
1605         }
1606         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1607 }
1608
1609 static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry)
1610 {
1611         info->cmd_reset = AMD_CMD_RESET;
1612
1613         cmdset_amd_read_jedec_ids(info);
1614         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1615
1616         return 0;
1617 }
1618
1619 #ifdef CONFIG_FLASH_CFI_LEGACY
1620 static void flash_read_jedec_ids (flash_info_t * info)
1621 {
1622         info->manufacturer_id = 0;
1623         info->device_id       = 0;
1624         info->device_id2      = 0;
1625
1626         switch (info->vendor) {
1627         case CFI_CMDSET_INTEL_PROG_REGIONS:
1628         case CFI_CMDSET_INTEL_STANDARD:
1629         case CFI_CMDSET_INTEL_EXTENDED:
1630                 cmdset_intel_read_jedec_ids(info);
1631                 break;
1632         case CFI_CMDSET_AMD_STANDARD:
1633         case CFI_CMDSET_AMD_EXTENDED:
1634                 cmdset_amd_read_jedec_ids(info);
1635                 break;
1636         default:
1637                 break;
1638         }
1639 }
1640
1641 /*-----------------------------------------------------------------------
1642  * Call board code to request info about non-CFI flash.
1643  * board_flash_get_legacy needs to fill in at least:
1644  * info->portwidth, info->chipwidth and info->interface for Jedec probing.
1645  */
1646 static int flash_detect_legacy(phys_addr_t base, int banknum)
1647 {
1648         flash_info_t *info = &flash_info[banknum];
1649
1650         if (board_flash_get_legacy(base, banknum, info)) {
1651                 /* board code may have filled info completely. If not, we
1652                    use JEDEC ID probing. */
1653                 if (!info->vendor) {
1654                         int modes[] = {
1655                                 CFI_CMDSET_AMD_STANDARD,
1656                                 CFI_CMDSET_INTEL_STANDARD
1657                         };
1658                         int i;
1659
1660                         for (i = 0; i < sizeof(modes) / sizeof(modes[0]); i++) {
1661                                 info->vendor = modes[i];
1662                                 info->start[0] =
1663                                         (ulong)map_physmem(base,
1664                                                            info->portwidth,
1665                                                            MAP_NOCACHE);
1666                                 if (info->portwidth == FLASH_CFI_8BIT
1667                                         && info->interface == FLASH_CFI_X8X16) {
1668                                         info->addr_unlock1 = 0x2AAA;
1669                                         info->addr_unlock2 = 0x5555;
1670                                 } else {
1671                                         info->addr_unlock1 = 0x5555;
1672                                         info->addr_unlock2 = 0x2AAA;
1673                                 }
1674                                 flash_read_jedec_ids(info);
1675                                 debug("JEDEC PROBE: ID %x %x %x\n",
1676                                                 info->manufacturer_id,
1677                                                 info->device_id,
1678                                                 info->device_id2);
1679                                 if (jedec_flash_match(info, info->start[0]))
1680                                         break;
1681                                 else
1682                                         unmap_physmem((void *)info->start[0],
1683                                                       MAP_NOCACHE);
1684                         }
1685                 }
1686
1687                 switch(info->vendor) {
1688                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1689                 case CFI_CMDSET_INTEL_STANDARD:
1690                 case CFI_CMDSET_INTEL_EXTENDED:
1691                         info->cmd_reset = FLASH_CMD_RESET;
1692                         break;
1693                 case CFI_CMDSET_AMD_STANDARD:
1694                 case CFI_CMDSET_AMD_EXTENDED:
1695                 case CFI_CMDSET_AMD_LEGACY:
1696                         info->cmd_reset = AMD_CMD_RESET;
1697                         break;
1698                 }
1699                 info->flash_id = FLASH_MAN_CFI;
1700                 return 1;
1701         }
1702         return 0; /* use CFI */
1703 }
1704 #else
1705 static inline int flash_detect_legacy(phys_addr_t base, int banknum)
1706 {
1707         return 0; /* use CFI */
1708 }
1709 #endif
1710
1711 /*-----------------------------------------------------------------------
1712  * detect if flash is compatible with the Common Flash Interface (CFI)
1713  * http://www.jedec.org/download/search/jesd68.pdf
1714  */
1715 static void flash_read_cfi (flash_info_t *info, void *buf,
1716                 unsigned int start, size_t len)
1717 {
1718         u8 *p = buf;
1719         unsigned int i;
1720
1721         for (i = 0; i < len; i++)
1722                 p[i] = flash_read_uchar(info, start + i);
1723 }
1724
1725 void __flash_cmd_reset(flash_info_t *info)
1726 {
1727         /*
1728          * We do not yet know what kind of commandset to use, so we issue
1729          * the reset command in both Intel and AMD variants, in the hope
1730          * that AMD flash roms ignore the Intel command.
1731          */
1732         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1733         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1734 }
1735 void flash_cmd_reset(flash_info_t *info)
1736         __attribute__((weak,alias("__flash_cmd_reset")));
1737
1738 static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1739 {
1740         int cfi_offset;
1741
1742         /* Issue FLASH reset command */
1743         flash_cmd_reset(info);
1744
1745         for (cfi_offset=0;
1746              cfi_offset < sizeof(flash_offset_cfi) / sizeof(uint);
1747              cfi_offset++) {
1748                 flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset],
1749                                  FLASH_CMD_CFI);
1750                 if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
1751                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
1752                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
1753                         flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
1754                                         sizeof(struct cfi_qry));
1755                         info->interface = le16_to_cpu(qry->interface_desc);
1756
1757                         info->cfi_offset = flash_offset_cfi[cfi_offset];
1758                         debug ("device interface is %d\n",
1759                                info->interface);
1760                         debug ("found port %d chip %d ",
1761                                info->portwidth, info->chipwidth);
1762                         debug ("port %d bits chip %d bits\n",
1763                                info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1764                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1765
1766                         /* calculate command offsets as in the Linux driver */
1767                         info->addr_unlock1 = 0x555;
1768                         info->addr_unlock2 = 0x2aa;
1769
1770                         /*
1771                          * modify the unlock address if we are
1772                          * in compatibility mode
1773                          */
1774                         if (    /* x8/x16 in x8 mode */
1775                                 ((info->chipwidth == FLASH_CFI_BY8) &&
1776                                         (info->interface == FLASH_CFI_X8X16)) ||
1777                                 /* x16/x32 in x16 mode */
1778                                 ((info->chipwidth == FLASH_CFI_BY16) &&
1779                                         (info->interface == FLASH_CFI_X16X32)))
1780                         {
1781                                 info->addr_unlock1 = 0xaaa;
1782                                 info->addr_unlock2 = 0x555;
1783                         }
1784
1785                         info->name = "CFI conformant";
1786                         return 1;
1787                 }
1788         }
1789
1790         return 0;
1791 }
1792
1793 static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1794 {
1795         debug ("flash detect cfi\n");
1796
1797         for (info->portwidth = CONFIG_SYS_FLASH_CFI_WIDTH;
1798              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
1799                 for (info->chipwidth = FLASH_CFI_BY8;
1800                      info->chipwidth <= info->portwidth;
1801                      info->chipwidth <<= 1)
1802                         if (__flash_detect_cfi(info, qry))
1803                                 return 1;
1804         }
1805         debug ("not found\n");
1806         return 0;
1807 }
1808
1809 /*
1810  * Manufacturer-specific quirks. Add workarounds for geometry
1811  * reversal, etc. here.
1812  */
1813 static void flash_fixup_amd(flash_info_t *info, struct cfi_qry *qry)
1814 {
1815         /* check if flash geometry needs reversal */
1816         if (qry->num_erase_regions > 1) {
1817                 /* reverse geometry if top boot part */
1818                 if (info->cfi_version < 0x3131) {
1819                         /* CFI < 1.1, try to guess from device id */
1820                         if ((info->device_id & 0x80) != 0)
1821                                 cfi_reverse_geometry(qry);
1822                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
1823                         /* CFI >= 1.1, deduct from top/bottom flag */
1824                         /* note: ext_addr is valid since cfi_version > 0 */
1825                         cfi_reverse_geometry(qry);
1826                 }
1827         }
1828 }
1829
1830 static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
1831 {
1832         int reverse_geometry = 0;
1833
1834         /* Check the "top boot" bit in the PRI */
1835         if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1))
1836                 reverse_geometry = 1;
1837
1838         /* AT49BV6416(T) list the erase regions in the wrong order.
1839          * However, the device ID is identical with the non-broken
1840          * AT49BV642D they differ in the high byte.
1841          */
1842         if (info->device_id == 0xd6 || info->device_id == 0xd2)
1843                 reverse_geometry = !reverse_geometry;
1844
1845         if (reverse_geometry)
1846                 cfi_reverse_geometry(qry);
1847 }
1848
1849 static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
1850 {
1851         /* check if flash geometry needs reversal */
1852         if (qry->num_erase_regions > 1) {
1853                 /* reverse geometry if top boot part */
1854                 if (info->cfi_version < 0x3131) {
1855                         /* CFI < 1.1, guess by device id (M29W320{DT,ET} only) */
1856                         if (info->device_id == 0x22CA ||
1857                             info->device_id == 0x2256) {
1858                                 cfi_reverse_geometry(qry);
1859                         }
1860                 }
1861         }
1862 }
1863
1864 /*
1865  * The following code cannot be run from FLASH!
1866  *
1867  */
1868 ulong flash_get_size (phys_addr_t base, int banknum)
1869 {
1870         flash_info_t *info = &flash_info[banknum];
1871         int i, j;
1872         flash_sect_t sect_cnt;
1873         phys_addr_t sector;
1874         unsigned long tmp;
1875         int size_ratio;
1876         uchar num_erase_regions;
1877         int erase_region_size;
1878         int erase_region_count;
1879         struct cfi_qry qry;
1880         unsigned long max_size;
1881
1882         memset(&qry, 0, sizeof(qry));
1883
1884         info->ext_addr = 0;
1885         info->cfi_version = 0;
1886 #ifdef CONFIG_SYS_FLASH_PROTECTION
1887         info->legacy_unlock = 0;
1888 #endif
1889
1890         info->start[0] = (ulong)map_physmem(base, info->portwidth, MAP_NOCACHE);
1891
1892         if (flash_detect_cfi (info, &qry)) {
1893                 info->vendor = le16_to_cpu(qry.p_id);
1894                 info->ext_addr = le16_to_cpu(qry.p_adr);
1895                 num_erase_regions = qry.num_erase_regions;
1896
1897                 if (info->ext_addr) {
1898                         info->cfi_version = (ushort) flash_read_uchar (info,
1899                                                 info->ext_addr + 3) << 8;
1900                         info->cfi_version |= (ushort) flash_read_uchar (info,
1901                                                 info->ext_addr + 4);
1902                 }
1903
1904 #ifdef DEBUG
1905                 flash_printqry (&qry);
1906 #endif
1907
1908                 switch (info->vendor) {
1909                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1910                 case CFI_CMDSET_INTEL_STANDARD:
1911                 case CFI_CMDSET_INTEL_EXTENDED:
1912                         cmdset_intel_init(info, &qry);
1913                         break;
1914                 case CFI_CMDSET_AMD_STANDARD:
1915                 case CFI_CMDSET_AMD_EXTENDED:
1916                         cmdset_amd_init(info, &qry);
1917                         break;
1918                 default:
1919                         printf("CFI: Unknown command set 0x%x\n",
1920                                         info->vendor);
1921                         /*
1922                          * Unfortunately, this means we don't know how
1923                          * to get the chip back to Read mode. Might
1924                          * as well try an Intel-style reset...
1925                          */
1926                         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1927                         return 0;
1928                 }
1929
1930                 /* Do manufacturer-specific fixups */
1931                 switch (info->manufacturer_id) {
1932                 case 0x0001: /* AMD */
1933                 case 0x0037: /* AMIC */
1934                         flash_fixup_amd(info, &qry);
1935                         break;
1936                 case 0x001f:
1937                         flash_fixup_atmel(info, &qry);
1938                         break;
1939                 case 0x0020:
1940                         flash_fixup_stm(info, &qry);
1941                         break;
1942                 }
1943
1944                 debug ("manufacturer is %d\n", info->vendor);
1945                 debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
1946                 debug ("device id is 0x%x\n", info->device_id);
1947                 debug ("device id2 is 0x%x\n", info->device_id2);
1948                 debug ("cfi version is 0x%04x\n", info->cfi_version);
1949
1950                 size_ratio = info->portwidth / info->chipwidth;
1951                 /* if the chip is x8/x16 reduce the ratio by half */
1952                 if ((info->interface == FLASH_CFI_X8X16)
1953                     && (info->chipwidth == FLASH_CFI_BY8)) {
1954                         size_ratio >>= 1;
1955                 }
1956                 debug ("size_ratio %d port %d bits chip %d bits\n",
1957                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1958                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1959                 info->size = 1 << qry.dev_size;
1960                 /* multiply the size by the number of chips */
1961                 info->size *= size_ratio;
1962                 max_size = cfi_flash_bank_size(banknum);
1963                 if (max_size && (info->size > max_size)) {
1964                         debug("[truncated from %ldMiB]", info->size >> 20);
1965                         info->size = max_size;
1966                 }
1967                 debug ("found %d erase regions\n", num_erase_regions);
1968                 sect_cnt = 0;
1969                 sector = base;
1970                 for (i = 0; i < num_erase_regions; i++) {
1971                         if (i > NUM_ERASE_REGIONS) {
1972                                 printf ("%d erase regions found, only %d used\n",
1973                                         num_erase_regions, NUM_ERASE_REGIONS);
1974                                 break;
1975                         }
1976
1977                         tmp = le32_to_cpu(qry.erase_region_info[i]);
1978                         debug("erase region %u: 0x%08lx\n", i, tmp);
1979
1980                         erase_region_count = (tmp & 0xffff) + 1;
1981                         tmp >>= 16;
1982                         erase_region_size =
1983                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
1984                         debug ("erase_region_count = %d erase_region_size = %d\n",
1985                                 erase_region_count, erase_region_size);
1986                         for (j = 0; j < erase_region_count; j++) {
1987                                 if (sector - base >= info->size)
1988                                         break;
1989                                 if (sect_cnt >= CONFIG_SYS_MAX_FLASH_SECT) {
1990                                         printf("ERROR: too many flash sectors\n");
1991                                         break;
1992                                 }
1993                                 info->start[sect_cnt] =
1994                                         (ulong)map_physmem(sector,
1995                                                            info->portwidth,
1996                                                            MAP_NOCACHE);
1997                                 sector += (erase_region_size * size_ratio);
1998
1999                                 /*
2000                                  * Only read protection status from
2001                                  * supported devices (intel...)
2002                                  */
2003                                 switch (info->vendor) {
2004                                 case CFI_CMDSET_INTEL_PROG_REGIONS:
2005                                 case CFI_CMDSET_INTEL_EXTENDED:
2006                                 case CFI_CMDSET_INTEL_STANDARD:
2007                                         /*
2008                                          * Set flash to read-id mode. Otherwise
2009                                          * reading protected status is not
2010                                          * guaranteed.
2011                                          */
2012                                         flash_write_cmd(info, sect_cnt, 0,
2013                                                         FLASH_CMD_READ_ID);
2014                                         info->protect[sect_cnt] =
2015                                                 flash_isset (info, sect_cnt,
2016                                                              FLASH_OFFSET_PROTECT,
2017                                                              FLASH_STATUS_PROTECT);
2018                                         break;
2019                                 default:
2020                                         /* default: not protected */
2021                                         info->protect[sect_cnt] = 0;
2022                                 }
2023
2024                                 sect_cnt++;
2025                         }
2026                 }
2027
2028                 info->sector_count = sect_cnt;
2029                 info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
2030                 tmp = 1 << qry.block_erase_timeout_typ;
2031                 info->erase_blk_tout = tmp *
2032                         (1 << qry.block_erase_timeout_max);
2033                 tmp = (1 << qry.buf_write_timeout_typ) *
2034                         (1 << qry.buf_write_timeout_max);
2035
2036                 /* round up when converting to ms */
2037                 info->buffer_write_tout = (tmp + 999) / 1000;
2038                 tmp = (1 << qry.word_write_timeout_typ) *
2039                         (1 << qry.word_write_timeout_max);
2040                 /* round up when converting to ms */
2041                 info->write_tout = (tmp + 999) / 1000;
2042                 info->flash_id = FLASH_MAN_CFI;
2043                 if ((info->interface == FLASH_CFI_X8X16) &&
2044                     (info->chipwidth == FLASH_CFI_BY8)) {
2045                         /* XXX - Need to test on x8/x16 in parallel. */
2046                         info->portwidth >>= 1;
2047                 }
2048
2049                 flash_write_cmd (info, 0, 0, info->cmd_reset);
2050         }
2051
2052         return (info->size);
2053 }
2054
2055 #ifdef CONFIG_FLASH_CFI_MTD
2056 void flash_set_verbose(uint v)
2057 {
2058         flash_verbose = v;
2059 }
2060 #endif
2061
2062 static void cfi_flash_set_config_reg(u32 base, u16 val)
2063 {
2064 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
2065         /*
2066          * Only set this config register if really defined
2067          * to a valid value (0xffff is invalid)
2068          */
2069         if (val == 0xffff)
2070                 return;
2071
2072         /*
2073          * Set configuration register. Data is "encrypted" in the 16 lower
2074          * address bits.
2075          */
2076         flash_write16(FLASH_CMD_SETUP, (void *)(base + (val << 1)));
2077         flash_write16(FLASH_CMD_SET_CR_CONFIRM, (void *)(base + (val << 1)));
2078
2079         /*
2080          * Finally issue reset-command to bring device back to
2081          * read-array mode
2082          */
2083         flash_write16(FLASH_CMD_RESET, (void *)base);
2084 #endif
2085 }
2086
2087 /*-----------------------------------------------------------------------
2088  */
2089
2090 void flash_protect_default(void)
2091 {
2092         /* Monitor protection ON by default */
2093 #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) && \
2094         (!defined(CONFIG_MONITOR_IS_IN_RAM))
2095         flash_protect(FLAG_PROTECT_SET,
2096                        CONFIG_SYS_MONITOR_BASE,
2097                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len  - 1,
2098                        flash_get_info(CONFIG_SYS_MONITOR_BASE));
2099 #endif
2100
2101         /* Environment protection ON by default */
2102 #ifdef CONFIG_ENV_IS_IN_FLASH
2103         flash_protect(FLAG_PROTECT_SET,
2104                        CONFIG_ENV_ADDR,
2105                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
2106                        flash_get_info(CONFIG_ENV_ADDR));
2107 #endif
2108
2109         /* Redundant environment protection ON by default */
2110 #ifdef CONFIG_ENV_ADDR_REDUND
2111         flash_protect(FLAG_PROTECT_SET,
2112                        CONFIG_ENV_ADDR_REDUND,
2113                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
2114                        flash_get_info(CONFIG_ENV_ADDR_REDUND));
2115 #endif
2116
2117 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2118         for (i = 0; i < (sizeof(apl) / sizeof(struct apl_s)); i++) {
2119                 debug("autoprotecting from %08x to %08x\n",
2120                       apl[i].start, apl[i].start + apl[i].size - 1);
2121                 flash_protect(FLAG_PROTECT_SET,
2122                                apl[i].start,
2123                                apl[i].start + apl[i].size - 1,
2124                                flash_get_info(apl[i].start));
2125         }
2126 #endif
2127 }
2128
2129 unsigned long flash_init (void)
2130 {
2131         unsigned long size = 0;
2132         int i;
2133 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2134         struct apl_s {
2135                 ulong start;
2136                 ulong size;
2137         } apl[] = CONFIG_SYS_FLASH_AUTOPROTECT_LIST;
2138 #endif
2139
2140 #ifdef CONFIG_SYS_FLASH_PROTECTION
2141         /* read environment from EEPROM */
2142         char s[64];
2143         getenv_f("unlock", s, sizeof(s));
2144 #endif
2145
2146         /* Init: no FLASHes known */
2147         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
2148                 flash_info[i].flash_id = FLASH_UNKNOWN;
2149
2150                 /* Optionally write flash configuration register */
2151                 cfi_flash_set_config_reg(cfi_flash_bank_addr(i),
2152                                          cfi_flash_config_reg(i));
2153
2154                 if (!flash_detect_legacy(cfi_flash_bank_addr(i), i))
2155                         flash_get_size(cfi_flash_bank_addr(i), i);
2156                 size += flash_info[i].size;
2157                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
2158 #ifndef CONFIG_SYS_FLASH_QUIET_TEST
2159                         printf ("## Unknown flash on Bank %d "
2160                                 "- Size = 0x%08lx = %ld MB\n",
2161                                 i+1, flash_info[i].size,
2162                                 flash_info[i].size >> 20);
2163 #endif /* CONFIG_SYS_FLASH_QUIET_TEST */
2164                 }
2165 #ifdef CONFIG_SYS_FLASH_PROTECTION
2166                 else if ((s != NULL) && (strcmp(s, "yes") == 0)) {
2167                         /*
2168                          * Only the U-Boot image and it's environment
2169                          * is protected, all other sectors are
2170                          * unprotected (unlocked) if flash hardware
2171                          * protection is used (CONFIG_SYS_FLASH_PROTECTION)
2172                          * and the environment variable "unlock" is
2173                          * set to "yes".
2174                          */
2175                         if (flash_info[i].legacy_unlock) {
2176                                 int k;
2177
2178                                 /*
2179                                  * Disable legacy_unlock temporarily,
2180                                  * since flash_real_protect would
2181                                  * relock all other sectors again
2182                                  * otherwise.
2183                                  */
2184                                 flash_info[i].legacy_unlock = 0;
2185
2186                                 /*
2187                                  * Legacy unlocking (e.g. Intel J3) ->
2188                                  * unlock only one sector. This will
2189                                  * unlock all sectors.
2190                                  */
2191                                 flash_real_protect (&flash_info[i], 0, 0);
2192
2193                                 flash_info[i].legacy_unlock = 1;
2194
2195                                 /*
2196                                  * Manually mark other sectors as
2197                                  * unlocked (unprotected)
2198                                  */
2199                                 for (k = 1; k < flash_info[i].sector_count; k++)
2200                                         flash_info[i].protect[k] = 0;
2201                         } else {
2202                                 /*
2203                                  * No legancy unlocking -> unlock all sectors
2204                                  */
2205                                 flash_protect (FLAG_PROTECT_CLEAR,
2206                                                flash_info[i].start[0],
2207                                                flash_info[i].start[0]
2208                                                + flash_info[i].size - 1,
2209                                                &flash_info[i]);
2210                         }
2211                 }
2212 #endif /* CONFIG_SYS_FLASH_PROTECTION */
2213         }
2214
2215         flash_protect_default();
2216 #ifdef CONFIG_FLASH_CFI_MTD
2217         cfi_mtd_init();
2218 #endif
2219
2220         return (size);
2221 }