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 static uint flash_verbose = 1;
  67
  68 flash_info_t flash_info[CFI_MAX_FLASH_BANKS];   /* FLASH chips info */
  69
  70 /*
  71  * Check if chip width is defined. If not, start detecting with 8bit.
  72  */
  73 #ifndef CONFIG_SYS_FLASH_CFI_WIDTH
  74 #define CONFIG_SYS_FLASH_CFI_WIDTH      FLASH_CFI_8BIT
  75 #endif
  76
  77 /*
  78  * 0xffff is an undefined value for the configuration register. When
  79  * this value is returned, the configuration register shall not be
  80  * written at all (default mode).
  81  */
  82 static u16 cfi_flash_config_reg(int i)
  83 {
  84 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
  85         return ((u16 [])CONFIG_SYS_CFI_FLASH_CONFIG_REGS)[i];
  86 #else
  87         return 0xffff;
  88 #endif
  89 }
  90
  91 #if defined(CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
  92 int cfi_flash_num_flash_banks = CONFIG_SYS_MAX_FLASH_BANKS_DETECT;
  93 #endif
  94
  95 static phys_addr_t __cfi_flash_bank_addr(int i)
  96 {
  97         return ((phys_addr_t [])CONFIG_SYS_FLASH_BANKS_LIST)[i];
  98 }
  99 phys_addr_t cfi_flash_bank_addr(int i)
 100         __attribute__((weak, alias("__cfi_flash_bank_addr")));
 101
 102 static unsigned long __cfi_flash_bank_size(int i)
 103 {
 104 #ifdef CONFIG_SYS_FLASH_BANKS_SIZES
 105         return ((unsigned long [])CONFIG_SYS_FLASH_BANKS_SIZES)[i];
 106 #else
 107         return 0;
 108 #endif
 109 }
 110 unsigned long cfi_flash_bank_size(int i)
 111         __attribute__((weak, alias("__cfi_flash_bank_size")));
 112
 113 static void __flash_write8(u8 value, void *addr)
 114 {
 115         __raw_writeb(value, addr);
 116 }
 117
 118 static void __flash_write16(u16 value, void *addr)
 119 {
 120         __raw_writew(value, addr);
 121 }
 122
 123 static void __flash_write32(u32 value, void *addr)
 124 {
 125         __raw_writel(value, addr);
 126 }
 127
 128 static void __flash_write64(u64 value, void *addr)
 129 {
 130         /* No architectures currently implement __raw_writeq() */
 131         *(volatile u64 *)addr = value;
 132 }
 133
 134 static u8 __flash_read8(void *addr)
 135 {
 136         return __raw_readb(addr);
 137 }
 138
 139 static u16 __flash_read16(void *addr)
 140 {
 141         return __raw_readw(addr);
 142 }
 143
 144 static u32 __flash_read32(void *addr)
 145 {
 146         return __raw_readl(addr);
 147 }
 148
 149 static u64 __flash_read64(void *addr)
 150 {
 151         /* No architectures currently implement __raw_readq() */
 152         return *(volatile u64 *)addr;
 153 }
 154
 155 #ifdef CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS
 156 void flash_write8(u8 value, void *addr)__attribute__((weak, alias("__flash_write8")));
 157 void flash_write16(u16 value, void *addr)__attribute__((weak, alias("__flash_write16")));
 158 void flash_write32(u32 value, void *addr)__attribute__((weak, alias("__flash_write32")));
 159 void flash_write64(u64 value, void *addr)__attribute__((weak, alias("__flash_write64")));
 160 u8 flash_read8(void *addr)__attribute__((weak, alias("__flash_read8")));
 161 u16 flash_read16(void *addr)__attribute__((weak, alias("__flash_read16")));
 162 u32 flash_read32(void *addr)__attribute__((weak, alias("__flash_read32")));
 163 u64 flash_read64(void *addr)__attribute__((weak, alias("__flash_read64")));
 164 #else
 165 #define flash_write8    __flash_write8
 166 #define flash_write16   __flash_write16
 167 #define flash_write32   __flash_write32
 168 #define flash_write64   __flash_write64
 169 #define flash_read8     __flash_read8
 170 #define flash_read16    __flash_read16
 171 #define flash_read32    __flash_read32
 172 #define flash_read64    __flash_read64
 173 #endif
 174
 175 /*-----------------------------------------------------------------------
 176  */
 177 #if defined(CONFIG_ENV_IS_IN_FLASH) || defined(CONFIG_ENV_ADDR_REDUND) || (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
 178 flash_info_t *flash_get_info(ulong base)
 179 {
 180         int i;
 181         flash_info_t *info = NULL;
 182
 183         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 184                 info = & flash_info[i];
 185                 if (info->size && info->start[0] <= base &&
 186                     base <= info->start[0] + info->size - 1)
 187                         break;
 188         }
 189
 190         return info;
 191 }
 192 #endif
 193
 194 unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect)
 195 {
 196         if (sect != (info->sector_count - 1))
 197                 return info->start[sect + 1] - info->start[sect];
 198         else
 199                 return info->start[0] + info->size - info->start[sect];
 200 }
 201
 202 /*-----------------------------------------------------------------------
 203  * create an address based on the offset and the port width
 204  */
 205 static inline void *
 206 flash_map (flash_info_t * info, flash_sect_t sect, uint offset)
 207 {
 208         unsigned int byte_offset = offset * info->portwidth;
 209
 210         return (void *)(info->start[sect] + byte_offset);
 211 }
 212
 213 static inline void flash_unmap(flash_info_t *info, flash_sect_t sect,
 214                 unsigned int offset, void *addr)
 215 {
 216 }
 217
 218 /*-----------------------------------------------------------------------
 219  * make a proper sized command based on the port and chip widths
 220  */
 221 static void flash_make_cmd(flash_info_t *info, u32 cmd, void *cmdbuf)
 222 {
 223         int i;
 224         int cword_offset;
 225         int cp_offset;
 226 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 227         u32 cmd_le = cpu_to_le32(cmd);
 228 #endif
 229         uchar val;
 230         uchar *cp = (uchar *) cmdbuf;
 231
 232         for (i = info->portwidth; i > 0; i--){
 233                 cword_offset = (info->portwidth-i)%info->chipwidth;
 234 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 235                 cp_offset = info->portwidth - i;
 236                 val = *((uchar*)&cmd_le + cword_offset);
 237 #else
 238                 cp_offset = i - 1;
 239                 val = *((uchar*)&cmd + sizeof(u32) - cword_offset - 1);
 240 #endif
 241                 cp[cp_offset] = (cword_offset >= sizeof(u32)) ? 0x00 : val;
 242         }
 243 }
 244
 245 #ifdef DEBUG
 246 /*-----------------------------------------------------------------------
 247  * Debug support
 248  */
 249 static void print_longlong (char *str, unsigned long long data)
 250 {
 251         int i;
 252         char *cp;
 253
 254         cp = (char *) &data;
 255         for (i = 0; i < 8; i++)
 256                 sprintf (&str[i * 2], "%2.2x", *cp++);
 257 }
 258
 259 static void flash_printqry (struct cfi_qry *qry)
 260 {
 261         u8 *p = (u8 *)qry;
 262         int x, y;
 263
 264         for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
 265                 debug("%02x : ", x);
 266                 for (y = 0; y < 16; y++)
 267                         debug("%2.2x ", p[x + y]);
 268                 debug(" ");
 269                 for (y = 0; y < 16; y++) {
 270                         unsigned char c = p[x + y];
 271                         if (c >= 0x20 && c <= 0x7e)
 272                                 debug("%c", c);
 273                         else
 274                                 debug(".");
 275                 }
 276                 debug("\n");
 277         }
 278 }
 279 #endif
 280
 281
 282 /*-----------------------------------------------------------------------
 283  * read a character at a port width address
 284  */
 285 static inline uchar flash_read_uchar (flash_info_t * info, uint offset)
 286 {
 287         uchar *cp;
 288         uchar retval;
 289
 290         cp = flash_map (info, 0, offset);
 291 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 292         retval = flash_read8(cp);
 293 #else
 294         retval = flash_read8(cp + info->portwidth - 1);
 295 #endif
 296         flash_unmap (info, 0, offset, cp);
 297         return retval;
 298 }
 299
 300 /*-----------------------------------------------------------------------
 301  * read a word at a port width address, assume 16bit bus
 302  */
 303 static inline ushort flash_read_word (flash_info_t * info, uint offset)
 304 {
 305         ushort *addr, retval;
 306
 307         addr = flash_map (info, 0, offset);
 308         retval = flash_read16 (addr);
 309         flash_unmap (info, 0, offset, addr);
 310         return retval;
 311 }
 312
 313
 314 /*-----------------------------------------------------------------------
 315  * read a long word by picking the least significant byte of each maximum
 316  * port size word. Swap for ppc format.
 317  */
 318 static ulong flash_read_long (flash_info_t * info, flash_sect_t sect,
 319                               uint offset)
 320 {
 321         uchar *addr;
 322         ulong retval;
 323
 324 #ifdef DEBUG
 325         int x;
 326 #endif
 327         addr = flash_map (info, sect, offset);
 328
 329 #ifdef DEBUG
 330         debug ("long addr is at %p info->portwidth = %d\n", addr,
 331                info->portwidth);
 332         for (x = 0; x < 4 * info->portwidth; x++) {
 333                 debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
 334         }
 335 #endif
 336 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 337         retval = ((flash_read8(addr) << 16) |
 338                   (flash_read8(addr + info->portwidth) << 24) |
 339                   (flash_read8(addr + 2 * info->portwidth)) |
 340                   (flash_read8(addr + 3 * info->portwidth) << 8));
 341 #else
 342         retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) |
 343                   (flash_read8(addr + info->portwidth - 1) << 16) |
 344                   (flash_read8(addr + 4 * info->portwidth - 1) << 8) |
 345                   (flash_read8(addr + 3 * info->portwidth - 1)));
 346 #endif
 347         flash_unmap(info, sect, offset, addr);
 348
 349         return retval;
 350 }
 351
 352 /*
 353  * Write a proper sized command to the correct address
 354  */
 355 void flash_write_cmd (flash_info_t * info, flash_sect_t sect,
 356                       uint offset, u32 cmd)
 357 {
 358
 359         void *addr;
 360         cfiword_t cword;
 361
 362         addr = flash_map (info, sect, offset);
 363         flash_make_cmd (info, cmd, &cword);
 364         switch (info->portwidth) {
 365         case FLASH_CFI_8BIT:
 366                 debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr, cmd,
 367                        cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 368                 flash_write8(cword.c, addr);
 369                 break;
 370         case FLASH_CFI_16BIT:
 371                 debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr,
 372                        cmd, cword.w,
 373                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 374                 flash_write16(cword.w, addr);
 375                 break;
 376         case FLASH_CFI_32BIT:
 377                 debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr,
 378                        cmd, cword.l,
 379                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 380                 flash_write32(cword.l, addr);
 381                 break;
 382         case FLASH_CFI_64BIT:
 383 #ifdef DEBUG
 384                 {
 385                         char str[20];
 386
 387                         print_longlong (str, cword.ll);
 388
 389                         debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
 390                                addr, cmd, str,
 391                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 392                 }
 393 #endif
 394                 flash_write64(cword.ll, addr);
 395                 break;
 396         }
 397
 398         /* Ensure all the instructions are fully finished */
 399         sync();
 400
 401         flash_unmap(info, sect, offset, addr);
 402 }
 403
 404 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
 405 {
 406         flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_UNLOCK_START);
 407         flash_write_cmd (info, sect, info->addr_unlock2, AMD_CMD_UNLOCK_ACK);
 408 }
 409
 410 /*-----------------------------------------------------------------------
 411  */
 412 static int flash_isequal (flash_info_t * info, flash_sect_t sect,
 413                           uint offset, uchar cmd)
 414 {
 415         void *addr;
 416         cfiword_t cword;
 417         int retval;
 418
 419         addr = flash_map (info, sect, offset);
 420         flash_make_cmd (info, cmd, &cword);
 421
 422         debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
 423         switch (info->portwidth) {
 424         case FLASH_CFI_8BIT:
 425                 debug ("is= %x %x\n", flash_read8(addr), cword.c);
 426                 retval = (flash_read8(addr) == cword.c);
 427                 break;
 428         case FLASH_CFI_16BIT:
 429                 debug ("is= %4.4x %4.4x\n", flash_read16(addr), cword.w);
 430                 retval = (flash_read16(addr) == cword.w);
 431                 break;
 432         case FLASH_CFI_32BIT:
 433                 debug ("is= %8.8x %8.8lx\n", flash_read32(addr), cword.l);
 434                 retval = (flash_read32(addr) == cword.l);
 435                 break;
 436         case FLASH_CFI_64BIT:
 437 #ifdef DEBUG
 438                 {
 439                         char str1[20];
 440                         char str2[20];
 441
 442                         print_longlong (str1, flash_read64(addr));
 443                         print_longlong (str2, cword.ll);
 444                         debug ("is= %s %s\n", str1, str2);
 445                 }
 446 #endif
 447                 retval = (flash_read64(addr) == cword.ll);
 448                 break;
 449         default:
 450                 retval = 0;
 451                 break;
 452         }
 453         flash_unmap(info, sect, offset, addr);
 454
 455         return retval;
 456 }
 457
 458 /*-----------------------------------------------------------------------
 459  */
 460 static int flash_isset (flash_info_t * info, flash_sect_t sect,
 461                         uint offset, uchar cmd)
 462 {
 463         void *addr;
 464         cfiword_t cword;
 465         int retval;
 466
 467         addr = flash_map (info, sect, offset);
 468         flash_make_cmd (info, cmd, &cword);
 469         switch (info->portwidth) {
 470         case FLASH_CFI_8BIT:
 471                 retval = ((flash_read8(addr) & cword.c) == cword.c);
 472                 break;
 473         case FLASH_CFI_16BIT:
 474                 retval = ((flash_read16(addr) & cword.w) == cword.w);
 475                 break;
 476         case FLASH_CFI_32BIT:
 477                 retval = ((flash_read32(addr) & cword.l) == cword.l);
 478                 break;
 479         case FLASH_CFI_64BIT:
 480                 retval = ((flash_read64(addr) & cword.ll) == cword.ll);
 481                 break;
 482         default:
 483                 retval = 0;
 484                 break;
 485         }
 486         flash_unmap(info, sect, offset, addr);
 487
 488         return retval;
 489 }
 490
 491 /*-----------------------------------------------------------------------
 492  */
 493 static int flash_toggle (flash_info_t * info, flash_sect_t sect,
 494                          uint offset, uchar cmd)
 495 {
 496         void *addr;
 497         cfiword_t cword;
 498         int retval;
 499
 500         addr = flash_map (info, sect, offset);
 501         flash_make_cmd (info, cmd, &cword);
 502         switch (info->portwidth) {
 503         case FLASH_CFI_8BIT:
 504                 retval = flash_read8(addr) != flash_read8(addr);
 505                 break;
 506         case FLASH_CFI_16BIT:
 507                 retval = flash_read16(addr) != flash_read16(addr);
 508                 break;
 509         case FLASH_CFI_32BIT:
 510                 retval = flash_read32(addr) != flash_read32(addr);
 511                 break;
 512         case FLASH_CFI_64BIT:
 513                 retval = ( (flash_read32( addr ) != flash_read32( addr )) ||
 514                            (flash_read32(addr+4) != flash_read32(addr+4)) );
 515                 break;
 516         default:
 517                 retval = 0;
 518                 break;
 519         }
 520         flash_unmap(info, sect, offset, addr);
 521
 522         return retval;
 523 }
 524
 525 /*
 526  * flash_is_busy - check to see if the flash is busy
 527  *
 528  * This routine checks the status of the chip and returns true if the
 529  * chip is busy.
 530  */
 531 static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
 532 {
 533         int retval;
 534
 535         switch (info->vendor) {
 536         case CFI_CMDSET_INTEL_PROG_REGIONS:
 537         case CFI_CMDSET_INTEL_STANDARD:
 538         case CFI_CMDSET_INTEL_EXTENDED:
 539                 retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
 540                 break;
 541         case CFI_CMDSET_AMD_STANDARD:
 542         case CFI_CMDSET_AMD_EXTENDED:
 543 #ifdef CONFIG_FLASH_CFI_LEGACY
 544         case CFI_CMDSET_AMD_LEGACY:
 545 #endif
 546                 retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
 547                 break;
 548         default:
 549                 retval = 0;
 550         }
 551         debug ("flash_is_busy: %d\n", retval);
 552         return retval;
 553 }
 554
 555 /*-----------------------------------------------------------------------
 556  *  wait for XSR.7 to be set. Time out with an error if it does not.
 557  *  This routine does not set the flash to read-array mode.
 558  */
 559 static int flash_status_check (flash_info_t * info, flash_sect_t sector,
 560                                ulong tout, char *prompt)
 561 {
 562         ulong start;
 563
 564 #if CONFIG_SYS_HZ != 1000
 565         if ((ulong)CONFIG_SYS_HZ > 100000)
 566                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 567         else
 568                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 569 #endif
 570
 571         /* Wait for command completion */
 572         reset_timer();
 573         start = get_timer (0);
 574         while (flash_is_busy (info, sector)) {
 575                 if (get_timer (start) > tout) {
 576                         printf ("Flash %s timeout at address %lx data %lx\n",
 577                                 prompt, info->start[sector],
 578                                 flash_read_long (info, sector, 0));
 579                         flash_write_cmd (info, sector, 0, info->cmd_reset);
 580                         return ERR_TIMOUT;
 581                 }
 582                 udelay (1);             /* also triggers watchdog */
 583         }
 584         return ERR_OK;
 585 }
 586
 587 /*-----------------------------------------------------------------------
 588  * Wait for XSR.7 to be set, if it times out print an error, otherwise
 589  * do a full status check.
 590  *
 591  * This routine sets the flash to read-array mode.
 592  */
 593 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 594                                     ulong tout, char *prompt)
 595 {
 596         int retcode;
 597
 598         retcode = flash_status_check (info, sector, tout, prompt);
 599         switch (info->vendor) {
 600         case CFI_CMDSET_INTEL_PROG_REGIONS:
 601         case CFI_CMDSET_INTEL_EXTENDED:
 602         case CFI_CMDSET_INTEL_STANDARD:
 603                 if ((retcode != ERR_OK)
 604                     && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 605                         retcode = ERR_INVAL;
 606                         printf ("Flash %s error at address %lx\n", prompt,
 607                                 info->start[sector]);
 608                         if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS |
 609                                          FLASH_STATUS_PSLBS)) {
 610                                 puts ("Command Sequence Error.\n");
 611                         } else if (flash_isset (info, sector, 0,
 612                                                 FLASH_STATUS_ECLBS)) {
 613                                 puts ("Block Erase Error.\n");
 614                                 retcode = ERR_NOT_ERASED;
 615                         } else if (flash_isset (info, sector, 0,
 616                                                 FLASH_STATUS_PSLBS)) {
 617                                 puts ("Locking Error\n");
 618                         }
 619                         if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
 620                                 puts ("Block locked.\n");
 621                                 retcode = ERR_PROTECTED;
 622                         }
 623                         if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
 624                                 puts ("Vpp Low Error.\n");
 625                 }
 626                 flash_write_cmd (info, sector, 0, info->cmd_reset);
 627                 break;
 628         default:
 629                 break;
 630         }
 631         return retcode;
 632 }
 633
 634 static int use_flash_status_poll(flash_info_t *info)
 635 {
 636 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 637         if (info->vendor == CFI_CMDSET_AMD_EXTENDED ||
 638             info->vendor == CFI_CMDSET_AMD_STANDARD)
 639                 return 1;
 640 #endif
 641         return 0;
 642 }
 643
 644 static int flash_status_poll(flash_info_t *info, void *src, void *dst,
 645                              ulong tout, char *prompt)
 646 {
 647 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 648         ulong start;
 649         int ready;
 650
 651 #if CONFIG_SYS_HZ != 1000
 652         if ((ulong)CONFIG_SYS_HZ > 100000)
 653                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 654         else
 655                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 656 #endif
 657
 658         /* Wait for command completion */
 659         reset_timer();
 660         start = get_timer(0);
 661         while (1) {
 662                 switch (info->portwidth) {
 663                 case FLASH_CFI_8BIT:
 664                         ready = flash_read8(dst) == flash_read8(src);
 665                         break;
 666                 case FLASH_CFI_16BIT:
 667                         ready = flash_read16(dst) == flash_read16(src);
 668                         break;
 669                 case FLASH_CFI_32BIT:
 670                         ready = flash_read32(dst) == flash_read32(src);
 671                         break;
 672                 case FLASH_CFI_64BIT:
 673                         ready = flash_read64(dst) == flash_read64(src);
 674                         break;
 675                 default:
 676                         ready = 0;
 677                         break;
 678                 }
 679                 if (ready)
 680                         break;
 681                 if (get_timer(start) > tout) {
 682                         printf("Flash %s timeout at address %lx data %lx\n",
 683                                prompt, (ulong)dst, (ulong)flash_read8(dst));
 684                         return ERR_TIMOUT;
 685                 }
 686                 udelay(1);              /* also triggers watchdog */
 687         }
 688 #endif /* CONFIG_SYS_CFI_FLASH_STATUS_POLL */
 689         return ERR_OK;
 690 }
 691
 692 /*-----------------------------------------------------------------------
 693  */
 694 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 695 {
 696 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 697         unsigned short  w;
 698         unsigned int    l;
 699         unsigned long long ll;
 700 #endif
 701
 702         switch (info->portwidth) {
 703         case FLASH_CFI_8BIT:
 704                 cword->c = c;
 705                 break;
 706         case FLASH_CFI_16BIT:
 707 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 708                 w = c;
 709                 w <<= 8;
 710                 cword->w = (cword->w >> 8) | w;
 711 #else
 712                 cword->w = (cword->w << 8) | c;
 713 #endif
 714                 break;
 715         case FLASH_CFI_32BIT:
 716 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 717                 l = c;
 718                 l <<= 24;
 719                 cword->l = (cword->l >> 8) | l;
 720 #else
 721                 cword->l = (cword->l << 8) | c;
 722 #endif
 723                 break;
 724         case FLASH_CFI_64BIT:
 725 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 726                 ll = c;
 727                 ll <<= 56;
 728                 cword->ll = (cword->ll >> 8) | ll;
 729 #else
 730                 cword->ll = (cword->ll << 8) | c;
 731 #endif
 732                 break;
 733         }
 734 }
 735
 736 /*
 737  * Loop through the sector table starting from the previously found sector.
 738  * Searches forwards or backwards, dependent on the passed address.
 739  */
 740 static flash_sect_t find_sector (flash_info_t * info, ulong addr)
 741 {
 742         static flash_sect_t saved_sector = 0; /* previously found sector */
 743         flash_sect_t sector = saved_sector;
 744
 745         while ((info->start[sector] < addr)
 746                         && (sector < info->sector_count - 1))
 747                 sector++;
 748         while ((info->start[sector] > addr) && (sector > 0))
 749                 /*
 750                  * also decrements the sector in case of an overshot
 751                  * in the first loop
 752                  */
 753                 sector--;
 754
 755         saved_sector = sector;
 756         return sector;
 757 }
 758
 759 /*-----------------------------------------------------------------------
 760  */
 761 static int flash_write_cfiword (flash_info_t * info, ulong dest,
 762                                 cfiword_t cword)
 763 {
 764         void *dstaddr = (void *)dest;
 765         int flag;
 766         flash_sect_t sect = 0;
 767         char sect_found = 0;
 768
 769         /* Check if Flash is (sufficiently) erased */
 770         switch (info->portwidth) {
 771         case FLASH_CFI_8BIT:
 772                 flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
 773                 break;
 774         case FLASH_CFI_16BIT:
 775                 flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
 776                 break;
 777         case FLASH_CFI_32BIT:
 778                 flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
 779                 break;
 780         case FLASH_CFI_64BIT:
 781                 flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
 782                 break;
 783         default:
 784                 flag = 0;
 785                 break;
 786         }
 787         if (!flag)
 788                 return ERR_NOT_ERASED;
 789
 790         /* Disable interrupts which might cause a timeout here */
 791         flag = disable_interrupts ();
 792
 793         switch (info->vendor) {
 794         case CFI_CMDSET_INTEL_PROG_REGIONS:
 795         case CFI_CMDSET_INTEL_EXTENDED:
 796         case CFI_CMDSET_INTEL_STANDARD:
 797                 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
 798                 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
 799                 break;
 800         case CFI_CMDSET_AMD_EXTENDED:
 801         case CFI_CMDSET_AMD_STANDARD:
 802                 sect = find_sector(info, dest);
 803                 flash_unlock_seq (info, sect);
 804                 flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE);
 805                 sect_found = 1;
 806                 break;
 807 #ifdef CONFIG_FLASH_CFI_LEGACY
 808         case CFI_CMDSET_AMD_LEGACY:
 809                 sect = find_sector(info, dest);
 810                 flash_unlock_seq (info, 0);
 811                 flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_WRITE);
 812                 sect_found = 1;
 813                 break;
 814 #endif
 815         }
 816
 817         switch (info->portwidth) {
 818         case FLASH_CFI_8BIT:
 819                 flash_write8(cword.c, dstaddr);
 820                 break;
 821         case FLASH_CFI_16BIT:
 822                 flash_write16(cword.w, dstaddr);
 823                 break;
 824         case FLASH_CFI_32BIT:
 825                 flash_write32(cword.l, dstaddr);
 826                 break;
 827         case FLASH_CFI_64BIT:
 828                 flash_write64(cword.ll, dstaddr);
 829                 break;
 830         }
 831
 832         /* re-enable interrupts if necessary */
 833         if (flag)
 834                 enable_interrupts ();
 835
 836         if (!sect_found)
 837                 sect = find_sector (info, dest);
 838
 839         if (use_flash_status_poll(info))
 840                 return flash_status_poll(info, &cword, dstaddr,
 841                                          info->write_tout, "write");
 842         else
 843                 return flash_full_status_check(info, sect,
 844                                                info->write_tout, "write");
 845 }
 846
 847 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 848
 849 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
 850                                   int len)
 851 {
 852         flash_sect_t sector;
 853         int cnt;
 854         int retcode;
 855         void *src = cp;
 856         void *dst = (void *)dest;
 857         void *dst2 = dst;
 858         int flag = 0;
 859         uint offset = 0;
 860         unsigned int shift;
 861         uchar write_cmd;
 862
 863         switch (info->portwidth) {
 864         case FLASH_CFI_8BIT:
 865                 shift = 0;
 866                 break;
 867         case FLASH_CFI_16BIT:
 868                 shift = 1;
 869                 break;
 870         case FLASH_CFI_32BIT:
 871                 shift = 2;
 872                 break;
 873         case FLASH_CFI_64BIT:
 874                 shift = 3;
 875                 break;
 876         default:
 877                 retcode = ERR_INVAL;
 878                 goto out_unmap;
 879         }
 880
 881         cnt = len >> shift;
 882
 883         while ((cnt-- > 0) && (flag == 0)) {
 884                 switch (info->portwidth) {
 885                 case FLASH_CFI_8BIT:
 886                         flag = ((flash_read8(dst2) & flash_read8(src)) ==
 887                                 flash_read8(src));
 888                         src += 1, dst2 += 1;
 889                         break;
 890                 case FLASH_CFI_16BIT:
 891                         flag = ((flash_read16(dst2) & flash_read16(src)) ==
 892                                 flash_read16(src));
 893                         src += 2, dst2 += 2;
 894                         break;
 895                 case FLASH_CFI_32BIT:
 896                         flag = ((flash_read32(dst2) & flash_read32(src)) ==
 897                                 flash_read32(src));
 898                         src += 4, dst2 += 4;
 899                         break;
 900                 case FLASH_CFI_64BIT:
 901                         flag = ((flash_read64(dst2) & flash_read64(src)) ==
 902                                 flash_read64(src));
 903                         src += 8, dst2 += 8;
 904                         break;
 905                 }
 906         }
 907         if (!flag) {
 908                 retcode = ERR_NOT_ERASED;
 909                 goto out_unmap;
 910         }
 911
 912         src = cp;
 913         sector = find_sector (info, dest);
 914
 915         switch (info->vendor) {
 916         case CFI_CMDSET_INTEL_PROG_REGIONS:
 917         case CFI_CMDSET_INTEL_STANDARD:
 918         case CFI_CMDSET_INTEL_EXTENDED:
 919                 write_cmd = (info->vendor == CFI_CMDSET_INTEL_PROG_REGIONS) ?
 920                                         FLASH_CMD_WRITE_BUFFER_PROG : FLASH_CMD_WRITE_TO_BUFFER;
 921                 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 922                 flash_write_cmd (info, sector, 0, FLASH_CMD_READ_STATUS);
 923                 flash_write_cmd (info, sector, 0, write_cmd);
 924                 retcode = flash_status_check (info, sector,
 925                                               info->buffer_write_tout,
 926                                               "write to buffer");
 927                 if (retcode == ERR_OK) {
 928                         /* reduce the number of loops by the width of
 929                          * the port */
 930                         cnt = len >> shift;
 931                         flash_write_cmd (info, sector, 0, cnt - 1);
 932                         while (cnt-- > 0) {
 933                                 switch (info->portwidth) {
 934                                 case FLASH_CFI_8BIT:
 935                                         flash_write8(flash_read8(src), dst);
 936                                         src += 1, dst += 1;
 937                                         break;
 938                                 case FLASH_CFI_16BIT:
 939                                         flash_write16(flash_read16(src), dst);
 940                                         src += 2, dst += 2;
 941                                         break;
 942                                 case FLASH_CFI_32BIT:
 943                                         flash_write32(flash_read32(src), dst);
 944                                         src += 4, dst += 4;
 945                                         break;
 946                                 case FLASH_CFI_64BIT:
 947                                         flash_write64(flash_read64(src), dst);
 948                                         src += 8, dst += 8;
 949                                         break;
 950                                 default:
 951                                         retcode = ERR_INVAL;
 952                                         goto out_unmap;
 953                                 }
 954                         }
 955                         flash_write_cmd (info, sector, 0,
 956                                          FLASH_CMD_WRITE_BUFFER_CONFIRM);
 957                         retcode = flash_full_status_check (
 958                                 info, sector, info->buffer_write_tout,
 959                                 "buffer write");
 960                 }
 961
 962                 break;
 963
 964         case CFI_CMDSET_AMD_STANDARD:
 965         case CFI_CMDSET_AMD_EXTENDED:
 966                 flash_unlock_seq(info,0);
 967
 968 #ifdef CONFIG_FLASH_SPANSION_S29WS_N
 969                 offset = ((unsigned long)dst - info->start[sector]) >> shift;
 970 #endif
 971                 flash_write_cmd(info, sector, offset, AMD_CMD_WRITE_TO_BUFFER);
 972                 cnt = len >> shift;
 973                 flash_write_cmd(info, sector, offset, cnt - 1);
 974
 975                 switch (info->portwidth) {
 976                 case FLASH_CFI_8BIT:
 977                         while (cnt-- > 0) {
 978                                 flash_write8(flash_read8(src), dst);
 979                                 src += 1, dst += 1;
 980                         }
 981                         break;
 982                 case FLASH_CFI_16BIT:
 983                         while (cnt-- > 0) {
 984                                 flash_write16(flash_read16(src), dst);
 985                                 src += 2, dst += 2;
 986                         }
 987                         break;
 988                 case FLASH_CFI_32BIT:
 989                         while (cnt-- > 0) {
 990                                 flash_write32(flash_read32(src), dst);
 991                                 src += 4, dst += 4;
 992                         }
 993                         break;
 994                 case FLASH_CFI_64BIT:
 995                         while (cnt-- > 0) {
 996                                 flash_write64(flash_read64(src), dst);
 997                                 src += 8, dst += 8;
 998                         }
 999                         break;
1000                 default:
1001                         retcode = ERR_INVAL;
1002                         goto out_unmap;
1003                 }
1004
1005                 flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
1006                 if (use_flash_status_poll(info))
1007                         retcode = flash_status_poll(info, src - (1 << shift),
1008                                                     dst - (1 << shift),
1009                                                     info->buffer_write_tout,
1010                                                     "buffer write");
1011                 else
1012                         retcode = flash_full_status_check(info, sector,
1013                                                           info->buffer_write_tout,
1014                                                           "buffer write");
1015                 break;
1016
1017         default:
1018                 debug ("Unknown Command Set\n");
1019                 retcode = ERR_INVAL;
1020                 break;
1021         }
1022
1023 out_unmap:
1024         return retcode;
1025 }
1026 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1027
1028
1029 /*-----------------------------------------------------------------------
1030  */
1031 int flash_erase (flash_info_t * info, int s_first, int s_last)
1032 {
1033         int rcode = 0;
1034         int prot;
1035         flash_sect_t sect;
1036         int st;
1037
1038         if (info->flash_id != FLASH_MAN_CFI) {
1039                 puts ("Can't erase unknown flash type - aborted\n");
1040                 return 1;
1041         }
1042         if ((s_first < 0) || (s_first > s_last)) {
1043                 puts ("- no sectors to erase\n");
1044                 return 1;
1045         }
1046
1047         prot = 0;
1048         for (sect = s_first; sect <= s_last; ++sect) {
1049                 if (info->protect[sect]) {
1050                         prot++;
1051                 }
1052         }
1053         if (prot) {
1054                 printf ("- Warning: %d protected sectors will not be erased!\n",
1055                         prot);
1056         } else if (flash_verbose) {
1057                 putc ('\n');
1058         }
1059
1060
1061         for (sect = s_first; sect <= s_last; sect++) {
1062                 if (info->protect[sect] == 0) { /* not protected */
1063                         switch (info->vendor) {
1064                         case CFI_CMDSET_INTEL_PROG_REGIONS:
1065                         case CFI_CMDSET_INTEL_STANDARD:
1066                         case CFI_CMDSET_INTEL_EXTENDED:
1067                                 flash_write_cmd (info, sect, 0,
1068                                                  FLASH_CMD_CLEAR_STATUS);
1069                                 flash_write_cmd (info, sect, 0,
1070                                                  FLASH_CMD_BLOCK_ERASE);
1071                                 flash_write_cmd (info, sect, 0,
1072                                                  FLASH_CMD_ERASE_CONFIRM);
1073                                 break;
1074                         case CFI_CMDSET_AMD_STANDARD:
1075                         case CFI_CMDSET_AMD_EXTENDED:
1076                                 flash_unlock_seq (info, sect);
1077                                 flash_write_cmd (info, sect,
1078                                                 info->addr_unlock1,
1079                                                 AMD_CMD_ERASE_START);
1080                                 flash_unlock_seq (info, sect);
1081                                 flash_write_cmd (info, sect, 0,
1082                                                  AMD_CMD_ERASE_SECTOR);
1083                                 break;
1084 #ifdef CONFIG_FLASH_CFI_LEGACY
1085                         case CFI_CMDSET_AMD_LEGACY:
1086                                 flash_unlock_seq (info, 0);
1087                                 flash_write_cmd (info, 0, info->addr_unlock1,
1088                                                 AMD_CMD_ERASE_START);
1089                                 flash_unlock_seq (info, 0);
1090                                 flash_write_cmd (info, sect, 0,
1091                                                 AMD_CMD_ERASE_SECTOR);
1092                                 break;
1093 #endif
1094                         default:
1095                                 debug ("Unkown flash vendor %d\n",
1096                                        info->vendor);
1097                                 break;
1098                         }
1099
1100                         if (use_flash_status_poll(info)) {
1101                                 cfiword_t cword = (cfiword_t)0xffffffffffffffffULL;
1102                                 void *dest;
1103                                 dest = flash_map(info, sect, 0);
1104                                 st = flash_status_poll(info, &cword, dest,
1105                                                        info->erase_blk_tout, "erase");
1106                                 flash_unmap(info, sect, 0, dest);
1107                         } else
1108                                 st = flash_full_status_check(info, sect,
1109                                                              info->erase_blk_tout,
1110                                                              "erase");
1111                         if (st)
1112                                 rcode = 1;
1113                         else if (flash_verbose)
1114                                 putc ('.');
1115                 }
1116         }
1117
1118         if (flash_verbose)
1119                 puts (" done\n");
1120
1121         return rcode;
1122 }
1123
1124 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1125 static int sector_erased(flash_info_t *info, int i)
1126 {
1127         int k;
1128         int size;
1129         u32 *flash;
1130
1131         /*
1132          * Check if whole sector is erased
1133          */
1134         size = flash_sector_size(info, i);
1135         flash = (u32 *)info->start[i];
1136         /* divide by 4 for longword access */
1137         size = size >> 2;
1138
1139         for (k = 0; k < size; k++) {
1140                 if (flash_read32(flash++) != 0xffffffff)
1141                         return 0;       /* not erased */
1142         }
1143
1144         return 1;                       /* erased */
1145 }
1146 #endif /* CONFIG_SYS_FLASH_EMPTY_INFO */
1147
1148 void flash_print_info (flash_info_t * info)
1149 {
1150         int i;
1151
1152         if (info->flash_id != FLASH_MAN_CFI) {
1153                 puts ("missing or unknown FLASH type\n");
1154                 return;
1155         }
1156
1157         printf ("%s FLASH (%d x %d)",
1158                 info->name,
1159                 (info->portwidth << 3), (info->chipwidth << 3));
1160         if (info->size < 1024*1024)
1161                 printf ("  Size: %ld kB in %d Sectors\n",
1162                         info->size >> 10, info->sector_count);
1163         else
1164                 printf ("  Size: %ld MB in %d Sectors\n",
1165                         info->size >> 20, info->sector_count);
1166         printf ("  ");
1167         switch (info->vendor) {
1168                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1169                         printf ("Intel Prog Regions");
1170                         break;
1171                 case CFI_CMDSET_INTEL_STANDARD:
1172                         printf ("Intel Standard");
1173                         break;
1174                 case CFI_CMDSET_INTEL_EXTENDED:
1175                         printf ("Intel Extended");
1176                         break;
1177                 case CFI_CMDSET_AMD_STANDARD:
1178                         printf ("AMD Standard");
1179                         break;
1180                 case CFI_CMDSET_AMD_EXTENDED:
1181                         printf ("AMD Extended");
1182                         break;
1183 #ifdef CONFIG_FLASH_CFI_LEGACY
1184                 case CFI_CMDSET_AMD_LEGACY:
1185                         printf ("AMD Legacy");
1186                         break;
1187 #endif
1188                 default:
1189                         printf ("Unknown (%d)", info->vendor);
1190                         break;
1191         }
1192         printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x",
1193                 info->manufacturer_id);
1194         printf (info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1195                 info->device_id);
1196         if (info->device_id == 0x7E) {
1197                 printf("%04X", info->device_id2);
1198         }
1199         printf ("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
1200                 info->erase_blk_tout,
1201                 info->write_tout);
1202         if (info->buffer_size > 1) {
1203                 printf ("  Buffer write timeout: %ld ms, "
1204                         "buffer size: %d bytes\n",
1205                 info->buffer_write_tout,
1206                 info->buffer_size);
1207         }
1208
1209         puts ("\n  Sector Start Addresses:");
1210         for (i = 0; i < info->sector_count; ++i) {
1211                 if (ctrlc())
1212                         break;
1213                 if ((i % 5) == 0)
1214                         putc('\n');
1215 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1216                 /* print empty and read-only info */
1217                 printf ("  %08lX %c %s ",
1218                         info->start[i],
1219                         sector_erased(info, i) ? 'E' : ' ',
1220                         info->protect[i] ? "RO" : "  ");
1221 #else   /* ! CONFIG_SYS_FLASH_EMPTY_INFO */
1222                 printf ("  %08lX   %s ",
1223                         info->start[i],
1224                         info->protect[i] ? "RO" : "  ");
1225 #endif
1226         }
1227         putc ('\n');
1228         return;
1229 }
1230
1231 /*-----------------------------------------------------------------------
1232  * This is used in a few places in write_buf() to show programming
1233  * progress.  Making it a function is nasty because it needs to do side
1234  * effect updates to digit and dots.  Repeated code is nasty too, so
1235  * we define it once here.
1236  */
1237 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1238 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub) \
1239         if (flash_verbose) { \
1240                 dots -= dots_sub; \
1241                 if ((scale > 0) && (dots <= 0)) { \
1242                         if ((digit % 5) == 0) \
1243                                 printf ("%d", digit / 5); \
1244                         else \
1245                                 putc ('.'); \
1246                         digit--; \
1247                         dots += scale; \
1248                 } \
1249         }
1250 #else
1251 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub)
1252 #endif
1253
1254 /*-----------------------------------------------------------------------
1255  * Copy memory to flash, returns:
1256  * 0 - OK
1257  * 1 - write timeout
1258  * 2 - Flash not erased
1259  */
1260 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
1261 {
1262         ulong wp;
1263         uchar *p;
1264         int aln;
1265         cfiword_t cword;
1266         int i, rc;
1267 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1268         int buffered_size;
1269 #endif
1270 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1271         int digit = CONFIG_FLASH_SHOW_PROGRESS;
1272         int scale = 0;
1273         int dots  = 0;
1274
1275         /*
1276          * Suppress if there are fewer than CONFIG_FLASH_SHOW_PROGRESS writes.
1277          */
1278         if (cnt >= CONFIG_FLASH_SHOW_PROGRESS) {
1279                 scale = (int)((cnt + CONFIG_FLASH_SHOW_PROGRESS - 1) /
1280                         CONFIG_FLASH_SHOW_PROGRESS);
1281         }
1282 #endif
1283
1284         /* get lower aligned address */
1285         wp = (addr & ~(info->portwidth - 1));
1286
1287         /* handle unaligned start */
1288         if ((aln = addr - wp) != 0) {
1289                 cword.l = 0;
1290                 p = (uchar *)wp;
1291                 for (i = 0; i < aln; ++i)
1292                         flash_add_byte (info, &cword, flash_read8(p + i));
1293
1294                 for (; (i < info->portwidth) && (cnt > 0); i++) {
1295                         flash_add_byte (info, &cword, *src++);
1296                         cnt--;
1297                 }
1298                 for (; (cnt == 0) && (i < info->portwidth); ++i)
1299                         flash_add_byte (info, &cword, flash_read8(p + i));
1300
1301                 rc = flash_write_cfiword (info, wp, cword);
1302                 if (rc != 0)
1303                         return rc;
1304
1305                 wp += i;
1306                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1307         }
1308
1309         /* handle the aligned part */
1310 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1311         buffered_size = (info->portwidth / info->chipwidth);
1312         buffered_size *= info->buffer_size;
1313         while (cnt >= info->portwidth) {
1314                 /* prohibit buffer write when buffer_size is 1 */
1315                 if (info->buffer_size == 1) {
1316                         cword.l = 0;
1317                         for (i = 0; i < info->portwidth; i++)
1318                                 flash_add_byte (info, &cword, *src++);
1319                         if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1320                                 return rc;
1321                         wp += info->portwidth;
1322                         cnt -= info->portwidth;
1323                         continue;
1324                 }
1325
1326                 /* write buffer until next buffered_size aligned boundary */
1327                 i = buffered_size - (wp % buffered_size);
1328                 if (i > cnt)
1329                         i = cnt;
1330                 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
1331                         return rc;
1332                 i -= i & (info->portwidth - 1);
1333                 wp += i;
1334                 src += i;
1335                 cnt -= i;
1336                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1337         }
1338 #else
1339         while (cnt >= info->portwidth) {
1340                 cword.l = 0;
1341                 for (i = 0; i < info->portwidth; i++) {
1342                         flash_add_byte (info, &cword, *src++);
1343                 }
1344                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1345                         return rc;
1346                 wp += info->portwidth;
1347                 cnt -= info->portwidth;
1348                 FLASH_SHOW_PROGRESS(scale, dots, digit, info->portwidth);
1349         }
1350 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1351
1352         if (cnt == 0) {
1353                 return (0);
1354         }
1355
1356         /*
1357          * handle unaligned tail bytes
1358          */
1359         cword.l = 0;
1360         p = (uchar *)wp;
1361         for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
1362                 flash_add_byte (info, &cword, *src++);
1363                 --cnt;
1364         }
1365         for (; i < info->portwidth; ++i)
1366                 flash_add_byte (info, &cword, flash_read8(p + i));
1367
1368         return flash_write_cfiword (info, wp, cword);
1369 }
1370
1371 /*-----------------------------------------------------------------------
1372  */
1373 #ifdef CONFIG_SYS_FLASH_PROTECTION
1374
1375 int flash_real_protect (flash_info_t * info, long sector, int prot)
1376 {
1377         int retcode = 0;
1378
1379         switch (info->vendor) {
1380                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1381                 case CFI_CMDSET_INTEL_STANDARD:
1382                 case CFI_CMDSET_INTEL_EXTENDED:
1383                         /*
1384                          * see errata called
1385                          * "Numonyx Axcell P33/P30 Specification Update" :)
1386                          */
1387                         flash_write_cmd (info, sector, 0, FLASH_CMD_READ_ID);
1388                         if (!flash_isequal (info, sector, FLASH_OFFSET_PROTECT,
1389                                             prot)) {
1390                                 /*
1391                                  * cmd must come before FLASH_CMD_PROTECT + 20us
1392                                  * Disable interrupts which might cause a timeout here.
1393                                  */
1394                                 int flag = disable_interrupts ();
1395                                 unsigned short cmd;
1396
1397                                 if (prot)
1398                                         cmd = FLASH_CMD_PROTECT_SET;
1399                                 else
1400                                         cmd = FLASH_CMD_PROTECT_CLEAR;
1401
1402                                 flash_write_cmd (info, sector, 0,
1403                                                   FLASH_CMD_PROTECT);
1404                                 flash_write_cmd (info, sector, 0, cmd);
1405                                 /* re-enable interrupts if necessary */
1406                                 if (flag)
1407                                         enable_interrupts ();
1408                         }
1409                         break;
1410                 case CFI_CMDSET_AMD_EXTENDED:
1411                 case CFI_CMDSET_AMD_STANDARD:
1412                         /* U-Boot only checks the first byte */
1413                         if (info->manufacturer_id == (uchar)ATM_MANUFACT) {
1414                                 if (prot) {
1415                                         flash_unlock_seq (info, 0);
1416                                         flash_write_cmd (info, 0,
1417                                                         info->addr_unlock1,
1418                                                         ATM_CMD_SOFTLOCK_START);
1419                                         flash_unlock_seq (info, 0);
1420                                         flash_write_cmd (info, sector, 0,
1421                                                         ATM_CMD_LOCK_SECT);
1422                                 } else {
1423                                         flash_write_cmd (info, 0,
1424                                                         info->addr_unlock1,
1425                                                         AMD_CMD_UNLOCK_START);
1426                                         if (info->device_id == ATM_ID_BV6416)
1427                                                 flash_write_cmd (info, sector,
1428                                                         0, ATM_CMD_UNLOCK_SECT);
1429                                 }
1430                         }
1431                         break;
1432 #ifdef CONFIG_FLASH_CFI_LEGACY
1433                 case CFI_CMDSET_AMD_LEGACY:
1434                         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1435                         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
1436                         if (prot)
1437                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
1438                         else
1439                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
1440 #endif
1441         };
1442
1443         /*
1444          * Flash needs to be in status register read mode for
1445          * flash_full_status_check() to work correctly
1446          */
1447         flash_write_cmd(info, sector, 0, FLASH_CMD_READ_STATUS);
1448         if ((retcode =
1449              flash_full_status_check (info, sector, info->erase_blk_tout,
1450                                       prot ? "protect" : "unprotect")) == 0) {
1451
1452                 info->protect[sector] = prot;
1453
1454                 /*
1455                  * On some of Intel's flash chips (marked via legacy_unlock)
1456                  * unprotect unprotects all locking.
1457                  */
1458                 if ((prot == 0) && (info->legacy_unlock)) {
1459                         flash_sect_t i;
1460
1461                         for (i = 0; i < info->sector_count; i++) {
1462                                 if (info->protect[i])
1463                                         flash_real_protect (info, i, 1);
1464                         }
1465                 }
1466         }
1467         return retcode;
1468 }
1469
1470 /*-----------------------------------------------------------------------
1471  * flash_read_user_serial - read the OneTimeProgramming cells
1472  */
1473 void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
1474                              int len)
1475 {
1476         uchar *src;
1477         uchar *dst;
1478
1479         dst = buffer;
1480         src = flash_map (info, 0, FLASH_OFFSET_USER_PROTECTION);
1481         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1482         memcpy (dst, src + offset, len);
1483         flash_write_cmd (info, 0, 0, info->cmd_reset);
1484         flash_unmap(info, 0, FLASH_OFFSET_USER_PROTECTION, src);
1485 }
1486
1487 /*
1488  * flash_read_factory_serial - read the device Id from the protection area
1489  */
1490 void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
1491                                 int len)
1492 {
1493         uchar *src;
1494
1495         src = flash_map (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
1496         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1497         memcpy (buffer, src + offset, len);
1498         flash_write_cmd (info, 0, 0, info->cmd_reset);
1499         flash_unmap(info, 0, FLASH_OFFSET_INTEL_PROTECTION, src);
1500 }
1501
1502 #endif /* CONFIG_SYS_FLASH_PROTECTION */
1503
1504 /*-----------------------------------------------------------------------
1505  * Reverse the order of the erase regions in the CFI QRY structure.
1506  * This is needed for chips that are either a) correctly detected as
1507  * top-boot, or b) buggy.
1508  */
1509 static void cfi_reverse_geometry(struct cfi_qry *qry)
1510 {
1511         unsigned int i, j;
1512         u32 tmp;
1513
1514         for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) {
1515                 tmp = qry->erase_region_info[i];
1516                 qry->erase_region_info[i] = qry->erase_region_info[j];
1517                 qry->erase_region_info[j] = tmp;
1518         }
1519 }
1520
1521 /*-----------------------------------------------------------------------
1522  * read jedec ids from device and set corresponding fields in info struct
1523  *
1524  * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
1525  *
1526  */
1527 static void cmdset_intel_read_jedec_ids(flash_info_t *info)
1528 {
1529         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1530         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1531         udelay(1000); /* some flash are slow to respond */
1532         info->manufacturer_id = flash_read_uchar (info,
1533                                         FLASH_OFFSET_MANUFACTURER_ID);
1534         info->device_id = (info->chipwidth == FLASH_CFI_16BIT) ?
1535                         flash_read_word (info, FLASH_OFFSET_DEVICE_ID) :
1536                         flash_read_uchar (info, FLASH_OFFSET_DEVICE_ID);
1537         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1538 }
1539
1540 static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry)
1541 {
1542         info->cmd_reset = FLASH_CMD_RESET;
1543
1544         cmdset_intel_read_jedec_ids(info);
1545         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1546
1547 #ifdef CONFIG_SYS_FLASH_PROTECTION
1548         /* read legacy lock/unlock bit from intel flash */
1549         if (info->ext_addr) {
1550                 info->legacy_unlock = flash_read_uchar (info,
1551                                 info->ext_addr + 5) & 0x08;
1552         }
1553 #endif
1554
1555         return 0;
1556 }
1557
1558 static void cmdset_amd_read_jedec_ids(flash_info_t *info)
1559 {
1560         ushort bankId = 0;
1561         uchar  manuId;
1562
1563         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1564         flash_unlock_seq(info, 0);
1565         flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
1566         udelay(1000); /* some flash are slow to respond */
1567
1568         manuId = flash_read_uchar (info, FLASH_OFFSET_MANUFACTURER_ID);
1569         /* JEDEC JEP106Z specifies ID codes up to bank 7 */
1570         while (manuId == FLASH_CONTINUATION_CODE && bankId < 0x800) {
1571                 bankId += 0x100;
1572                 manuId = flash_read_uchar (info,
1573                         bankId | FLASH_OFFSET_MANUFACTURER_ID);
1574         }
1575         info->manufacturer_id = manuId;
1576
1577         switch (info->chipwidth){
1578         case FLASH_CFI_8BIT:
1579                 info->device_id = flash_read_uchar (info,
1580                                                 FLASH_OFFSET_DEVICE_ID);
1581                 if (info->device_id == 0x7E) {
1582                         /* AMD 3-byte (expanded) device ids */
1583                         info->device_id2 = flash_read_uchar (info,
1584                                                 FLASH_OFFSET_DEVICE_ID2);
1585                         info->device_id2 <<= 8;
1586                         info->device_id2 |= flash_read_uchar (info,
1587                                                 FLASH_OFFSET_DEVICE_ID3);
1588                 }
1589                 break;
1590         case FLASH_CFI_16BIT:
1591                 info->device_id = flash_read_word (info,
1592                                                 FLASH_OFFSET_DEVICE_ID);
1593                 break;
1594         default:
1595                 break;
1596         }
1597         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1598 }
1599
1600 static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry)
1601 {
1602         info->cmd_reset = AMD_CMD_RESET;
1603
1604         cmdset_amd_read_jedec_ids(info);
1605         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1606
1607         return 0;
1608 }
1609
1610 #ifdef CONFIG_FLASH_CFI_LEGACY
1611 static void flash_read_jedec_ids (flash_info_t * info)
1612 {
1613         info->manufacturer_id = 0;
1614         info->device_id       = 0;
1615         info->device_id2      = 0;
1616
1617         switch (info->vendor) {
1618         case CFI_CMDSET_INTEL_PROG_REGIONS:
1619         case CFI_CMDSET_INTEL_STANDARD:
1620         case CFI_CMDSET_INTEL_EXTENDED:
1621                 cmdset_intel_read_jedec_ids(info);
1622                 break;
1623         case CFI_CMDSET_AMD_STANDARD:
1624         case CFI_CMDSET_AMD_EXTENDED:
1625                 cmdset_amd_read_jedec_ids(info);
1626                 break;
1627         default:
1628                 break;
1629         }
1630 }
1631
1632 /*-----------------------------------------------------------------------
1633  * Call board code to request info about non-CFI flash.
1634  * board_flash_get_legacy needs to fill in at least:
1635  * info->portwidth, info->chipwidth and info->interface for Jedec probing.
1636  */
1637 static int flash_detect_legacy(phys_addr_t base, int banknum)
1638 {
1639         flash_info_t *info = &flash_info[banknum];
1640
1641         if (board_flash_get_legacy(base, banknum, info)) {
1642                 /* board code may have filled info completely. If not, we
1643                    use JEDEC ID probing. */
1644                 if (!info->vendor) {
1645                         int modes[] = {
1646                                 CFI_CMDSET_AMD_STANDARD,
1647                                 CFI_CMDSET_INTEL_STANDARD
1648                         };
1649                         int i;
1650
1651                         for (i = 0; i < sizeof(modes) / sizeof(modes[0]); i++) {
1652                                 info->vendor = modes[i];
1653                                 info->start[0] =
1654                                         (ulong)map_physmem(base,
1655                                                            info->portwidth,
1656                                                            MAP_NOCACHE);
1657                                 if (info->portwidth == FLASH_CFI_8BIT
1658                                         && info->interface == FLASH_CFI_X8X16) {
1659                                         info->addr_unlock1 = 0x2AAA;
1660                                         info->addr_unlock2 = 0x5555;
1661                                 } else {
1662                                         info->addr_unlock1 = 0x5555;
1663                                         info->addr_unlock2 = 0x2AAA;
1664                                 }
1665                                 flash_read_jedec_ids(info);
1666                                 debug("JEDEC PROBE: ID %x %x %x\n",
1667                                                 info->manufacturer_id,
1668                                                 info->device_id,
1669                                                 info->device_id2);
1670                                 if (jedec_flash_match(info, info->start[0]))
1671                                         break;
1672                                 else
1673                                         unmap_physmem((void *)info->start[0],
1674                                                       MAP_NOCACHE);
1675                         }
1676                 }
1677
1678                 switch(info->vendor) {
1679                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1680                 case CFI_CMDSET_INTEL_STANDARD:
1681                 case CFI_CMDSET_INTEL_EXTENDED:
1682                         info->cmd_reset = FLASH_CMD_RESET;
1683                         break;
1684                 case CFI_CMDSET_AMD_STANDARD:
1685                 case CFI_CMDSET_AMD_EXTENDED:
1686                 case CFI_CMDSET_AMD_LEGACY:
1687                         info->cmd_reset = AMD_CMD_RESET;
1688                         break;
1689                 }
1690                 info->flash_id = FLASH_MAN_CFI;
1691                 return 1;
1692         }
1693         return 0; /* use CFI */
1694 }
1695 #else
1696 static inline int flash_detect_legacy(phys_addr_t base, int banknum)
1697 {
1698         return 0; /* use CFI */
1699 }
1700 #endif
1701
1702 /*-----------------------------------------------------------------------
1703  * detect if flash is compatible with the Common Flash Interface (CFI)
1704  * http://www.jedec.org/download/search/jesd68.pdf
1705  */
1706 static void flash_read_cfi (flash_info_t *info, void *buf,
1707                 unsigned int start, size_t len)
1708 {
1709         u8 *p = buf;
1710         unsigned int i;
1711
1712         for (i = 0; i < len; i++)
1713                 p[i] = flash_read_uchar(info, start + i);
1714 }
1715
1716 void __flash_cmd_reset(flash_info_t *info)
1717 {
1718         /*
1719          * We do not yet know what kind of commandset to use, so we issue
1720          * the reset command in both Intel and AMD variants, in the hope
1721          * that AMD flash roms ignore the Intel command.
1722          */
1723         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1724         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1725 }
1726 void flash_cmd_reset(flash_info_t *info)
1727         __attribute__((weak,alias("__flash_cmd_reset")));
1728
1729 static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1730 {
1731         int cfi_offset;
1732
1733         /* Issue FLASH reset command */
1734         flash_cmd_reset(info);
1735
1736         for (cfi_offset=0;
1737              cfi_offset < sizeof(flash_offset_cfi) / sizeof(uint);
1738              cfi_offset++) {
1739                 flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset],
1740                                  FLASH_CMD_CFI);
1741                 if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
1742                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
1743                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
1744                         flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
1745                                         sizeof(struct cfi_qry));
1746                         info->interface = le16_to_cpu(qry->interface_desc);
1747
1748                         info->cfi_offset = flash_offset_cfi[cfi_offset];
1749                         debug ("device interface is %d\n",
1750                                info->interface);
1751                         debug ("found port %d chip %d ",
1752                                info->portwidth, info->chipwidth);
1753                         debug ("port %d bits chip %d bits\n",
1754                                info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1755                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1756
1757                         /* calculate command offsets as in the Linux driver */
1758                         info->addr_unlock1 = 0x555;
1759                         info->addr_unlock2 = 0x2aa;
1760
1761                         /*
1762                          * modify the unlock address if we are
1763                          * in compatibility mode
1764                          */
1765                         if (    /* x8/x16 in x8 mode */
1766                                 ((info->chipwidth == FLASH_CFI_BY8) &&
1767                                         (info->interface == FLASH_CFI_X8X16)) ||
1768                                 /* x16/x32 in x16 mode */
1769                                 ((info->chipwidth == FLASH_CFI_BY16) &&
1770                                         (info->interface == FLASH_CFI_X16X32)))
1771                         {
1772                                 info->addr_unlock1 = 0xaaa;
1773                                 info->addr_unlock2 = 0x555;
1774                         }
1775
1776                         info->name = "CFI conformant";
1777                         return 1;
1778                 }
1779         }
1780
1781         return 0;
1782 }
1783
1784 static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1785 {
1786         debug ("flash detect cfi\n");
1787
1788         for (info->portwidth = CONFIG_SYS_FLASH_CFI_WIDTH;
1789              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
1790                 for (info->chipwidth = FLASH_CFI_BY8;
1791                      info->chipwidth <= info->portwidth;
1792                      info->chipwidth <<= 1)
1793                         if (__flash_detect_cfi(info, qry))
1794                                 return 1;
1795         }
1796         debug ("not found\n");
1797         return 0;
1798 }
1799
1800 /*
1801  * Manufacturer-specific quirks. Add workarounds for geometry
1802  * reversal, etc. here.
1803  */
1804 static void flash_fixup_amd(flash_info_t *info, struct cfi_qry *qry)
1805 {
1806         /* check if flash geometry needs reversal */
1807         if (qry->num_erase_regions > 1) {
1808                 /* reverse geometry if top boot part */
1809                 if (info->cfi_version < 0x3131) {
1810                         /* CFI < 1.1, try to guess from device id */
1811                         if ((info->device_id & 0x80) != 0)
1812                                 cfi_reverse_geometry(qry);
1813                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
1814                         /* CFI >= 1.1, deduct from top/bottom flag */
1815                         /* note: ext_addr is valid since cfi_version > 0 */
1816                         cfi_reverse_geometry(qry);
1817                 }
1818         }
1819 }
1820
1821 static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
1822 {
1823         int reverse_geometry = 0;
1824
1825         /* Check the "top boot" bit in the PRI */
1826         if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1))
1827                 reverse_geometry = 1;
1828
1829         /* AT49BV6416(T) list the erase regions in the wrong order.
1830          * However, the device ID is identical with the non-broken
1831          * AT49BV642D they differ in the high byte.
1832          */
1833         if (info->device_id == 0xd6 || info->device_id == 0xd2)
1834                 reverse_geometry = !reverse_geometry;
1835
1836         if (reverse_geometry)
1837                 cfi_reverse_geometry(qry);
1838 }
1839
1840 static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
1841 {
1842         /* check if flash geometry needs reversal */
1843         if (qry->num_erase_regions > 1) {
1844                 /* reverse geometry if top boot part */
1845                 if (info->cfi_version < 0x3131) {
1846                         /* CFI < 1.1, guess by device id (M29W320{DT,ET} only) */
1847                         if (info->device_id == 0x22CA ||
1848                             info->device_id == 0x2256) {
1849                                 cfi_reverse_geometry(qry);
1850                         }
1851                 }
1852         }
1853 }
1854
1855 /*
1856  * The following code cannot be run from FLASH!
1857  *
1858  */
1859 ulong flash_get_size (phys_addr_t base, int banknum)
1860 {
1861         flash_info_t *info = &flash_info[banknum];
1862         int i, j;
1863         flash_sect_t sect_cnt;
1864         phys_addr_t sector;
1865         unsigned long tmp;
1866         int size_ratio;
1867         uchar num_erase_regions;
1868         int erase_region_size;
1869         int erase_region_count;
1870         struct cfi_qry qry;
1871         unsigned long max_size;
1872
1873         memset(&qry, 0, sizeof(qry));
1874
1875         info->ext_addr = 0;
1876         info->cfi_version = 0;
1877 #ifdef CONFIG_SYS_FLASH_PROTECTION
1878         info->legacy_unlock = 0;
1879 #endif
1880
1881         info->start[0] = (ulong)map_physmem(base, info->portwidth, MAP_NOCACHE);
1882
1883         if (flash_detect_cfi (info, &qry)) {
1884                 info->vendor = le16_to_cpu(qry.p_id);
1885                 info->ext_addr = le16_to_cpu(qry.p_adr);
1886                 num_erase_regions = qry.num_erase_regions;
1887
1888                 if (info->ext_addr) {
1889                         info->cfi_version = (ushort) flash_read_uchar (info,
1890                                                 info->ext_addr + 3) << 8;
1891                         info->cfi_version |= (ushort) flash_read_uchar (info,
1892                                                 info->ext_addr + 4);
1893                 }
1894
1895 #ifdef DEBUG
1896                 flash_printqry (&qry);
1897 #endif
1898
1899                 switch (info->vendor) {
1900                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1901                 case CFI_CMDSET_INTEL_STANDARD:
1902                 case CFI_CMDSET_INTEL_EXTENDED:
1903                         cmdset_intel_init(info, &qry);
1904                         break;
1905                 case CFI_CMDSET_AMD_STANDARD:
1906                 case CFI_CMDSET_AMD_EXTENDED:
1907                         cmdset_amd_init(info, &qry);
1908                         break;
1909                 default:
1910                         printf("CFI: Unknown command set 0x%x\n",
1911                                         info->vendor);
1912                         /*
1913                          * Unfortunately, this means we don't know how
1914                          * to get the chip back to Read mode. Might
1915                          * as well try an Intel-style reset...
1916                          */
1917                         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1918                         return 0;
1919                 }
1920
1921                 /* Do manufacturer-specific fixups */
1922                 switch (info->manufacturer_id) {
1923                 case 0x0001:
1924                         flash_fixup_amd(info, &qry);
1925                         break;
1926                 case 0x001f:
1927                         flash_fixup_atmel(info, &qry);
1928                         break;
1929                 case 0x0020:
1930                         flash_fixup_stm(info, &qry);
1931                         break;
1932                 }
1933
1934                 debug ("manufacturer is %d\n", info->vendor);
1935                 debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
1936                 debug ("device id is 0x%x\n", info->device_id);
1937                 debug ("device id2 is 0x%x\n", info->device_id2);
1938                 debug ("cfi version is 0x%04x\n", info->cfi_version);
1939
1940                 size_ratio = info->portwidth / info->chipwidth;
1941                 /* if the chip is x8/x16 reduce the ratio by half */
1942                 if ((info->interface == FLASH_CFI_X8X16)
1943                     && (info->chipwidth == FLASH_CFI_BY8)) {
1944                         size_ratio >>= 1;
1945                 }
1946                 debug ("size_ratio %d port %d bits chip %d bits\n",
1947                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1948                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1949                 info->size = 1 << qry.dev_size;
1950                 /* multiply the size by the number of chips */
1951                 info->size *= size_ratio;
1952                 max_size = cfi_flash_bank_size(banknum);
1953                 if (max_size && (info->size > max_size)) {
1954                         debug("[truncated from %ldMiB]", info->size >> 20);
1955                         info->size = max_size;
1956                 }
1957                 debug ("found %d erase regions\n", num_erase_regions);
1958                 sect_cnt = 0;
1959                 sector = base;
1960                 for (i = 0; i < num_erase_regions; i++) {
1961                         if (i > NUM_ERASE_REGIONS) {
1962                                 printf ("%d erase regions found, only %d used\n",
1963                                         num_erase_regions, NUM_ERASE_REGIONS);
1964                                 break;
1965                         }
1966
1967                         tmp = le32_to_cpu(qry.erase_region_info[i]);
1968                         debug("erase region %u: 0x%08lx\n", i, tmp);
1969
1970                         erase_region_count = (tmp & 0xffff) + 1;
1971                         tmp >>= 16;
1972                         erase_region_size =
1973                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
1974                         debug ("erase_region_count = %d erase_region_size = %d\n",
1975                                 erase_region_count, erase_region_size);
1976                         for (j = 0; j < erase_region_count; j++) {
1977                                 if (sector - base >= info->size)
1978                                         break;
1979                                 if (sect_cnt >= CONFIG_SYS_MAX_FLASH_SECT) {
1980                                         printf("ERROR: too many flash sectors\n");
1981                                         break;
1982                                 }
1983                                 info->start[sect_cnt] =
1984                                         (ulong)map_physmem(sector,
1985                                                            info->portwidth,
1986                                                            MAP_NOCACHE);
1987                                 sector += (erase_region_size * size_ratio);
1988
1989                                 /*
1990                                  * Only read protection status from
1991                                  * supported devices (intel...)
1992                                  */
1993                                 switch (info->vendor) {
1994                                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1995                                 case CFI_CMDSET_INTEL_EXTENDED:
1996                                 case CFI_CMDSET_INTEL_STANDARD:
1997                                         /*
1998                                          * Set flash to read-id mode. Otherwise
1999                                          * reading protected status is not
2000                                          * guaranteed.
2001                                          */
2002                                         flash_write_cmd(info, sect_cnt, 0,
2003                                                         FLASH_CMD_READ_ID);
2004                                         info->protect[sect_cnt] =
2005                                                 flash_isset (info, sect_cnt,
2006                                                              FLASH_OFFSET_PROTECT,
2007                                                              FLASH_STATUS_PROTECT);
2008                                         break;
2009                                 default:
2010                                         /* default: not protected */
2011                                         info->protect[sect_cnt] = 0;
2012                                 }
2013
2014                                 sect_cnt++;
2015                         }
2016                 }
2017
2018                 info->sector_count = sect_cnt;
2019                 info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
2020                 tmp = 1 << qry.block_erase_timeout_typ;
2021                 info->erase_blk_tout = tmp *
2022                         (1 << qry.block_erase_timeout_max);
2023                 tmp = (1 << qry.buf_write_timeout_typ) *
2024                         (1 << qry.buf_write_timeout_max);
2025
2026                 /* round up when converting to ms */
2027                 info->buffer_write_tout = (tmp + 999) / 1000;
2028                 tmp = (1 << qry.word_write_timeout_typ) *
2029                         (1 << qry.word_write_timeout_max);
2030                 /* round up when converting to ms */
2031                 info->write_tout = (tmp + 999) / 1000;
2032                 info->flash_id = FLASH_MAN_CFI;
2033                 if ((info->interface == FLASH_CFI_X8X16) &&
2034                     (info->chipwidth == FLASH_CFI_BY8)) {
2035                         /* XXX - Need to test on x8/x16 in parallel. */
2036                         info->portwidth >>= 1;
2037                 }
2038
2039                 flash_write_cmd (info, 0, 0, info->cmd_reset);
2040         }
2041
2042         return (info->size);
2043 }
2044
2045 void flash_set_verbose(uint v)
2046 {
2047         flash_verbose = v;
2048 }
2049
2050 static void cfi_flash_set_config_reg(u32 base, u16 val)
2051 {
2052 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
2053         /*
2054          * Only set this config register if really defined
2055          * to a valid value (0xffff is invalid)
2056          */
2057         if (val == 0xffff)
2058                 return;
2059
2060         /*
2061          * Set configuration register. Data is "encrypted" in the 16 lower
2062          * address bits.
2063          */
2064         flash_write16(FLASH_CMD_SETUP, (void *)(base + (val << 1)));
2065         flash_write16(FLASH_CMD_SET_CR_CONFIRM, (void *)(base + (val << 1)));
2066
2067         /*
2068          * Finally issue reset-command to bring device back to
2069          * read-array mode
2070          */
2071         flash_write16(FLASH_CMD_RESET, (void *)base);
2072 #endif
2073 }
2074
2075 /*-----------------------------------------------------------------------
2076  */
2077 unsigned long flash_init (void)
2078 {
2079         unsigned long size = 0;
2080         int i;
2081 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2082         struct apl_s {
2083                 ulong start;
2084                 ulong size;
2085         } apl[] = CONFIG_SYS_FLASH_AUTOPROTECT_LIST;
2086 #endif
2087
2088 #ifdef CONFIG_SYS_FLASH_PROTECTION
2089         /* read environment from EEPROM */
2090         char s[64];
2091         getenv_f("unlock", s, sizeof(s));
2092 #endif
2093
2094         /* Init: no FLASHes known */
2095         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
2096                 flash_info[i].flash_id = FLASH_UNKNOWN;
2097
2098                 /* Optionally write flash configuration register */
2099                 cfi_flash_set_config_reg(cfi_flash_bank_addr(i),
2100                                          cfi_flash_config_reg(i));
2101
2102                 if (!flash_detect_legacy(cfi_flash_bank_addr(i), i))
2103                         flash_get_size(cfi_flash_bank_addr(i), i);
2104                 size += flash_info[i].size;
2105                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
2106 #ifndef CONFIG_SYS_FLASH_QUIET_TEST
2107                         printf ("## Unknown FLASH on Bank %d "
2108                                 "- Size = 0x%08lx = %ld MB\n",
2109                                 i+1, flash_info[i].size,
2110                                 flash_info[i].size >> 20);
2111 #endif /* CONFIG_SYS_FLASH_QUIET_TEST */
2112                 }
2113 #ifdef CONFIG_SYS_FLASH_PROTECTION
2114                 else if ((s != NULL) && (strcmp(s, "yes") == 0)) {
2115                         /*
2116                          * Only the U-Boot image and it's environment
2117                          * is protected, all other sectors are
2118                          * unprotected (unlocked) if flash hardware
2119                          * protection is used (CONFIG_SYS_FLASH_PROTECTION)
2120                          * and the environment variable "unlock" is
2121                          * set to "yes".
2122                          */
2123                         if (flash_info[i].legacy_unlock) {
2124                                 int k;
2125
2126                                 /*
2127                                  * Disable legacy_unlock temporarily,
2128                                  * since flash_real_protect would
2129                                  * relock all other sectors again
2130                                  * otherwise.
2131                                  */
2132                                 flash_info[i].legacy_unlock = 0;
2133
2134                                 /*
2135                                  * Legacy unlocking (e.g. Intel J3) ->
2136                                  * unlock only one sector. This will
2137                                  * unlock all sectors.
2138                                  */
2139                                 flash_real_protect (&flash_info[i], 0, 0);
2140
2141                                 flash_info[i].legacy_unlock = 1;
2142
2143                                 /*
2144                                  * Manually mark other sectors as
2145                                  * unlocked (unprotected)
2146                                  */
2147                                 for (k = 1; k < flash_info[i].sector_count; k++)
2148                                         flash_info[i].protect[k] = 0;
2149                         } else {
2150                                 /*
2151                                  * No legancy unlocking -> unlock all sectors
2152                                  */
2153                                 flash_protect (FLAG_PROTECT_CLEAR,
2154                                                flash_info[i].start[0],
2155                                                flash_info[i].start[0]
2156                                                + flash_info[i].size - 1,
2157                                                &flash_info[i]);
2158                         }
2159                 }
2160 #endif /* CONFIG_SYS_FLASH_PROTECTION */
2161         }
2162
2163         /* Monitor protection ON by default */
2164 #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) && \
2165         (!defined(CONFIG_MONITOR_IS_IN_RAM))
2166         flash_protect (FLAG_PROTECT_SET,
2167                        CONFIG_SYS_MONITOR_BASE,
2168                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len  - 1,
2169                        flash_get_info(CONFIG_SYS_MONITOR_BASE));
2170 #endif
2171
2172         /* Environment protection ON by default */
2173 #ifdef CONFIG_ENV_IS_IN_FLASH
2174         flash_protect (FLAG_PROTECT_SET,
2175                        CONFIG_ENV_ADDR,
2176                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
2177                        flash_get_info(CONFIG_ENV_ADDR));
2178 #endif
2179
2180         /* Redundant environment protection ON by default */
2181 #ifdef CONFIG_ENV_ADDR_REDUND
2182         flash_protect (FLAG_PROTECT_SET,
2183                        CONFIG_ENV_ADDR_REDUND,
2184                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
2185                        flash_get_info(CONFIG_ENV_ADDR_REDUND));
2186 #endif
2187
2188 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2189         for (i = 0; i < (sizeof(apl) / sizeof(struct apl_s)); i++) {
2190                 debug("autoprotecting from %08x to %08x\n",
2191                       apl[i].start, apl[i].start + apl[i].size - 1);
2192                 flash_protect (FLAG_PROTECT_SET,
2193                                apl[i].start,
2194                                apl[i].start + apl[i].size - 1,
2195                                flash_get_info(apl[i].start));
2196         }
2197 #endif
2198
2199 #ifdef CONFIG_FLASH_CFI_MTD
2200         cfi_mtd_init();
2201 #endif
2202
2203         return (size);
2204 }