drivers/mtd/cfi_flash.c

   1 /*
   2  * (C) Copyright 2002-2004
   3  * Brad Kemp, Seranoa Networks, [email protected]
   4  *
   5  * Copyright (C) 2003 Arabella Software Ltd.
   6  * Yuli Barcohen <[email protected]>
   7  *
   8  * Copyright (C) 2004
   9  * Ed Okerson
  10  *
  11  * Copyright (C) 2006
  12  * Tolunay Orkun <[email protected]>
  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 #include <watchdog.h>
  44
  45 /*
  46  * This file implements a Common Flash Interface (CFI) driver for
  47  * U-Boot.
  48  *
  49  * The width of the port and the width of the chips are determined at
  50  * initialization.  These widths are used to calculate the address for
  51  * access CFI data structures.
  52  *
  53  * References
  54  * JEDEC Standard JESD68 - Common Flash Interface (CFI)
  55  * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
  56  * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
  57  * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
  58  * AMD CFI Specification, Release 2.0 December 1, 2001
  59  * AMD/Spansion Application Note: Migration from Single-byte to Three-byte
  60  *   Device IDs, Publication Number 25538 Revision A, November 8, 2001
  61  *
  62  * Define CONFIG_SYS_WRITE_SWAPPED_DATA, if you have to swap the Bytes between
  63  * reading and writing ... (yes there is such a Hardware).
  64  */
  65
  66 static uint flash_offset_cfi[2] = { FLASH_OFFSET_CFI, FLASH_OFFSET_CFI_ALT };
  67 #ifdef CONFIG_FLASH_CFI_MTD
  68 static uint flash_verbose = 1;
  69 #else
  70 #define flash_verbose 1
  71 #endif
  72
  73 flash_info_t flash_info[CFI_MAX_FLASH_BANKS];   /* FLASH chips info */
  74
  75 /*
  76  * Check if chip width is defined. If not, start detecting with 8bit.
  77  */
  78 #ifndef CONFIG_SYS_FLASH_CFI_WIDTH
  79 #define CONFIG_SYS_FLASH_CFI_WIDTH      FLASH_CFI_8BIT
  80 #endif
  81
  82 /*
  83  * 0xffff is an undefined value for the configuration register. When
  84  * this value is returned, the configuration register shall not be
  85  * written at all (default mode).
  86  */
  87 static u16 cfi_flash_config_reg(int i)
  88 {
  89 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
  90         return ((u16 [])CONFIG_SYS_CFI_FLASH_CONFIG_REGS)[i];
  91 #else
  92         return 0xffff;
  93 #endif
  94 }
  95
  96 #if defined(CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
  97 int cfi_flash_num_flash_banks = CONFIG_SYS_MAX_FLASH_BANKS_DETECT;
  98 #endif
  99
 100 static phys_addr_t __cfi_flash_bank_addr(int i)
 101 {
 102         return ((phys_addr_t [])CONFIG_SYS_FLASH_BANKS_LIST)[i];
 103 }
 104 phys_addr_t cfi_flash_bank_addr(int i)
 105         __attribute__((weak, alias("__cfi_flash_bank_addr")));
 106
 107 static unsigned long __cfi_flash_bank_size(int i)
 108 {
 109 #ifdef CONFIG_SYS_FLASH_BANKS_SIZES
 110         return ((unsigned long [])CONFIG_SYS_FLASH_BANKS_SIZES)[i];
 111 #else
 112         return 0;
 113 #endif
 114 }
 115 unsigned long cfi_flash_bank_size(int i)
 116         __attribute__((weak, alias("__cfi_flash_bank_size")));
 117
 118 static void __flash_write8(u8 value, void *addr)
 119 {
 120         __raw_writeb(value, addr);
 121 }
 122
 123 static void __flash_write16(u16 value, void *addr)
 124 {
 125         __raw_writew(value, addr);
 126 }
 127
 128 static void __flash_write32(u32 value, void *addr)
 129 {
 130         __raw_writel(value, addr);
 131 }
 132
 133 static void __flash_write64(u64 value, void *addr)
 134 {
 135         /* No architectures currently implement __raw_writeq() */
 136         *(volatile u64 *)addr = value;
 137 }
 138
 139 static u8 __flash_read8(void *addr)
 140 {
 141         return __raw_readb(addr);
 142 }
 143
 144 static u16 __flash_read16(void *addr)
 145 {
 146         return __raw_readw(addr);
 147 }
 148
 149 static u32 __flash_read32(void *addr)
 150 {
 151         return __raw_readl(addr);
 152 }
 153
 154 static u64 __flash_read64(void *addr)
 155 {
 156         /* No architectures currently implement __raw_readq() */
 157         return *(volatile u64 *)addr;
 158 }
 159
 160 #ifdef CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS
 161 void flash_write8(u8 value, void *addr)__attribute__((weak, alias("__flash_write8")));
 162 void flash_write16(u16 value, void *addr)__attribute__((weak, alias("__flash_write16")));
 163 void flash_write32(u32 value, void *addr)__attribute__((weak, alias("__flash_write32")));
 164 void flash_write64(u64 value, void *addr)__attribute__((weak, alias("__flash_write64")));
 165 u8 flash_read8(void *addr)__attribute__((weak, alias("__flash_read8")));
 166 u16 flash_read16(void *addr)__attribute__((weak, alias("__flash_read16")));
 167 u32 flash_read32(void *addr)__attribute__((weak, alias("__flash_read32")));
 168 u64 flash_read64(void *addr)__attribute__((weak, alias("__flash_read64")));
 169 #else
 170 #define flash_write8    __flash_write8
 171 #define flash_write16   __flash_write16
 172 #define flash_write32   __flash_write32
 173 #define flash_write64   __flash_write64
 174 #define flash_read8     __flash_read8
 175 #define flash_read16    __flash_read16
 176 #define flash_read32    __flash_read32
 177 #define flash_read64    __flash_read64
 178 #endif
 179
 180 /*-----------------------------------------------------------------------
 181  */
 182 #if defined(CONFIG_ENV_IS_IN_FLASH) || defined(CONFIG_ENV_ADDR_REDUND) || (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
 183 flash_info_t *flash_get_info(ulong base)
 184 {
 185         int i;
 186         flash_info_t *info = NULL;
 187
 188         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 189                 info = & flash_info[i];
 190                 if (info->size && info->start[0] <= base &&
 191                     base <= info->start[0] + info->size - 1)
 192                         break;
 193         }
 194
 195         return info;
 196 }
 197 #endif
 198
 199 unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect)
 200 {
 201         if (sect != (info->sector_count - 1))
 202                 return info->start[sect + 1] - info->start[sect];
 203         else
 204                 return info->start[0] + info->size - info->start[sect];
 205 }
 206
 207 /*-----------------------------------------------------------------------
 208  * create an address based on the offset and the port width
 209  */
 210 static inline void *
 211 flash_map (flash_info_t * info, flash_sect_t sect, uint offset)
 212 {
 213         unsigned int byte_offset = offset * info->portwidth / info->chipwidth;
 214         unsigned int addr = (info->start[sect] + byte_offset);
 215         unsigned int mask = 0xffffffff << (info->portwidth - 1);
 216
 217         return (void *)(addr & mask);
 218 }
 219
 220 static inline void flash_unmap(flash_info_t *info, flash_sect_t sect,
 221                 unsigned int offset, void *addr)
 222 {
 223 }
 224
 225 /*-----------------------------------------------------------------------
 226  * make a proper sized command based on the port and chip widths
 227  */
 228 static void flash_make_cmd(flash_info_t *info, u32 cmd, void *cmdbuf)
 229 {
 230         int i;
 231         int cword_offset;
 232         int cp_offset;
 233 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 234         u32 cmd_le = cpu_to_le32(cmd);
 235 #endif
 236         uchar val;
 237         uchar *cp = (uchar *) cmdbuf;
 238
 239         for (i = info->portwidth; i > 0; i--){
 240                 cword_offset = (info->portwidth-i)%info->chipwidth;
 241 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 242                 cp_offset = info->portwidth - i;
 243                 val = *((uchar*)&cmd_le + cword_offset);
 244 #else
 245                 cp_offset = i - 1;
 246                 val = *((uchar*)&cmd + sizeof(u32) - cword_offset - 1);
 247 #endif
 248                 cp[cp_offset] = (cword_offset >= sizeof(u32)) ? 0x00 : val;
 249         }
 250 }
 251
 252 #ifdef DEBUG
 253 /*-----------------------------------------------------------------------
 254  * Debug support
 255  */
 256 static void print_longlong (char *str, unsigned long long data)
 257 {
 258         int i;
 259         char *cp;
 260
 261         cp = (char *) &data;
 262         for (i = 0; i < 8; i++)
 263                 sprintf (&str[i * 2], "%2.2x", *cp++);
 264 }
 265
 266 static void flash_printqry (struct cfi_qry *qry)
 267 {
 268         u8 *p = (u8 *)qry;
 269         int x, y;
 270
 271         for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
 272                 debug("%02x : ", x);
 273                 for (y = 0; y < 16; y++)
 274                         debug("%2.2x ", p[x + y]);
 275                 debug(" ");
 276                 for (y = 0; y < 16; y++) {
 277                         unsigned char c = p[x + y];
 278                         if (c >= 0x20 && c <= 0x7e)
 279                                 debug("%c", c);
 280                         else
 281                                 debug(".");
 282                 }
 283                 debug("\n");
 284         }
 285 }
 286 #endif
 287
 288
 289 /*-----------------------------------------------------------------------
 290  * read a character at a port width address
 291  */
 292 static inline uchar flash_read_uchar (flash_info_t * info, uint offset)
 293 {
 294         uchar *cp;
 295         uchar retval;
 296
 297         cp = flash_map (info, 0, offset);
 298 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 299         retval = flash_read8(cp);
 300 #else
 301         retval = flash_read8(cp + info->portwidth - 1);
 302 #endif
 303         flash_unmap (info, 0, offset, cp);
 304         return retval;
 305 }
 306
 307 /*-----------------------------------------------------------------------
 308  * read a word at a port width address, assume 16bit bus
 309  */
 310 static inline ushort flash_read_word (flash_info_t * info, uint offset)
 311 {
 312         ushort *addr, retval;
 313
 314         addr = flash_map (info, 0, offset);
 315         retval = flash_read16 (addr);
 316         flash_unmap (info, 0, offset, addr);
 317         return retval;
 318 }
 319
 320
 321 /*-----------------------------------------------------------------------
 322  * read a long word by picking the least significant byte of each maximum
 323  * port size word. Swap for ppc format.
 324  */
 325 static ulong flash_read_long (flash_info_t * info, flash_sect_t sect,
 326                               uint offset)
 327 {
 328         uchar *addr;
 329         ulong retval;
 330
 331 #ifdef DEBUG
 332         int x;
 333 #endif
 334         addr = flash_map (info, sect, offset);
 335
 336 #ifdef DEBUG
 337         debug ("long addr is at %p info->portwidth = %d\n", addr,
 338                info->portwidth);
 339         for (x = 0; x < 4 * info->portwidth; x++) {
 340                 debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
 341         }
 342 #endif
 343 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 344         retval = ((flash_read8(addr) << 16) |
 345                   (flash_read8(addr + info->portwidth) << 24) |
 346                   (flash_read8(addr + 2 * info->portwidth)) |
 347                   (flash_read8(addr + 3 * info->portwidth) << 8));
 348 #else
 349         retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) |
 350                   (flash_read8(addr + info->portwidth - 1) << 16) |
 351                   (flash_read8(addr + 4 * info->portwidth - 1) << 8) |
 352                   (flash_read8(addr + 3 * info->portwidth - 1)));
 353 #endif
 354         flash_unmap(info, sect, offset, addr);
 355
 356         return retval;
 357 }
 358
 359 /*
 360  * Write a proper sized command to the correct address
 361  */
 362 void flash_write_cmd (flash_info_t * info, flash_sect_t sect,
 363                       uint offset, u32 cmd)
 364 {
 365
 366         void *addr;
 367         cfiword_t cword;
 368
 369         addr = flash_map (info, sect, offset);
 370         flash_make_cmd (info, cmd, &cword);
 371         switch (info->portwidth) {
 372         case FLASH_CFI_8BIT:
 373                 debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr, cmd,
 374                        cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 375                 flash_write8(cword.c, addr);
 376                 break;
 377         case FLASH_CFI_16BIT:
 378                 debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr,
 379                        cmd, cword.w,
 380                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 381                 flash_write16(cword.w, addr);
 382                 break;
 383         case FLASH_CFI_32BIT:
 384                 debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr,
 385                        cmd, cword.l,
 386                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 387                 flash_write32(cword.l, addr);
 388                 break;
 389         case FLASH_CFI_64BIT:
 390 #ifdef DEBUG
 391                 {
 392                         char str[20];
 393
 394                         print_longlong (str, cword.ll);
 395
 396                         debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
 397                                addr, cmd, str,
 398                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 399                 }
 400 #endif
 401                 flash_write64(cword.ll, addr);
 402                 break;
 403         default:
 404                 printf("fwc: Unknown port width %d\n", info->portwidth);
 405         }
 406
 407         /* Ensure all the instructions are fully finished */
 408         sync();
 409
 410         flash_unmap(info, sect, offset, addr);
 411 }
 412
 413 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
 414 {
 415         flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_UNLOCK_START);
 416         flash_write_cmd (info, sect, info->addr_unlock2, AMD_CMD_UNLOCK_ACK);
 417 }
 418
 419 /*-----------------------------------------------------------------------
 420  */
 421 static int flash_isequal (flash_info_t * info, flash_sect_t sect,
 422                           uint offset, uchar cmd)
 423 {
 424         void *addr;
 425         cfiword_t cword;
 426         int retval;
 427
 428         addr = flash_map (info, sect, offset);
 429         flash_make_cmd (info, cmd, &cword);
 430
 431         debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
 432         switch (info->portwidth) {
 433         case FLASH_CFI_8BIT:
 434                 debug ("is= %x %x\n", flash_read8(addr), cword.c);
 435                 retval = (flash_read8(addr) == cword.c);
 436                 break;
 437         case FLASH_CFI_16BIT:
 438                 debug ("is= %4.4x %4.4x\n", flash_read16(addr), cword.w);
 439                 retval = (flash_read16(addr) == cword.w);
 440                 break;
 441         case FLASH_CFI_32BIT:
 442                 debug ("is= %8.8x %8.8lx\n", flash_read32(addr), cword.l);
 443                 retval = (flash_read32(addr) == cword.l);
 444                 break;
 445         case FLASH_CFI_64BIT:
 446 #ifdef DEBUG
 447                 {
 448                         char str1[20];
 449                         char str2[20];
 450
 451                         print_longlong (str1, flash_read64(addr));
 452                         print_longlong (str2, cword.ll);
 453                         debug ("is= %s %s\n", str1, str2);
 454                 }
 455 #endif
 456                 retval = (flash_read64(addr) == cword.ll);
 457                 break;
 458         default:
 459                 retval = 0;
 460                 break;
 461         }
 462         flash_unmap(info, sect, offset, addr);
 463
 464         return retval;
 465 }
 466
 467 /*-----------------------------------------------------------------------
 468  */
 469 static int flash_isset (flash_info_t * info, flash_sect_t sect,
 470                         uint offset, uchar cmd)
 471 {
 472         void *addr;
 473         cfiword_t cword;
 474         int retval;
 475
 476         addr = flash_map (info, sect, offset);
 477         flash_make_cmd (info, cmd, &cword);
 478         switch (info->portwidth) {
 479         case FLASH_CFI_8BIT:
 480                 retval = ((flash_read8(addr) & cword.c) == cword.c);
 481                 break;
 482         case FLASH_CFI_16BIT:
 483                 retval = ((flash_read16(addr) & cword.w) == cword.w);
 484                 break;
 485         case FLASH_CFI_32BIT:
 486                 retval = ((flash_read32(addr) & cword.l) == cword.l);
 487                 break;
 488         case FLASH_CFI_64BIT:
 489                 retval = ((flash_read64(addr) & cword.ll) == cword.ll);
 490                 break;
 491         default:
 492                 retval = 0;
 493                 break;
 494         }
 495         flash_unmap(info, sect, offset, addr);
 496
 497         return retval;
 498 }
 499
 500 /*-----------------------------------------------------------------------
 501  */
 502 static int flash_toggle (flash_info_t * info, flash_sect_t sect,
 503                          uint offset, uchar cmd)
 504 {
 505         void *addr;
 506         cfiword_t cword;
 507         int retval;
 508
 509         addr = flash_map (info, sect, offset);
 510         flash_make_cmd (info, cmd, &cword);
 511         switch (info->portwidth) {
 512         case FLASH_CFI_8BIT:
 513                 retval = flash_read8(addr) != flash_read8(addr);
 514                 break;
 515         case FLASH_CFI_16BIT:
 516                 retval = flash_read16(addr) != flash_read16(addr);
 517                 break;
 518         case FLASH_CFI_32BIT:
 519                 retval = flash_read32(addr) != flash_read32(addr);
 520                 break;
 521         case FLASH_CFI_64BIT:
 522                 retval = ( (flash_read32( addr ) != flash_read32( addr )) ||
 523                            (flash_read32(addr+4) != flash_read32(addr+4)) );
 524                 break;
 525         default:
 526                 retval = 0;
 527                 break;
 528         }
 529         flash_unmap(info, sect, offset, addr);
 530
 531         return retval;
 532 }
 533
 534 /*
 535  * flash_is_busy - check to see if the flash is busy
 536  *
 537  * This routine checks the status of the chip and returns true if the
 538  * chip is busy.
 539  */
 540 static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
 541 {
 542         int retval;
 543
 544         switch (info->vendor) {
 545         case CFI_CMDSET_INTEL_PROG_REGIONS:
 546         case CFI_CMDSET_INTEL_STANDARD:
 547         case CFI_CMDSET_INTEL_EXTENDED:
 548                 retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
 549                 break;
 550         case CFI_CMDSET_AMD_STANDARD:
 551         case CFI_CMDSET_AMD_EXTENDED:
 552 #ifdef CONFIG_FLASH_CFI_LEGACY
 553         case CFI_CMDSET_AMD_LEGACY:
 554 #endif
 555                 retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
 556                 break;
 557         default:
 558                 retval = 0;
 559         }
 560         debug ("flash_is_busy: %d\n", retval);
 561         return retval;
 562 }
 563
 564 /*-----------------------------------------------------------------------
 565  *  wait for XSR.7 to be set. Time out with an error if it does not.
 566  *  This routine does not set the flash to read-array mode.
 567  */
 568 static int flash_status_check (flash_info_t * info, flash_sect_t sector,
 569                                ulong tout, char *prompt)
 570 {
 571         ulong start;
 572
 573 #if CONFIG_SYS_HZ != 1000
 574         if ((ulong)CONFIG_SYS_HZ > 100000)
 575                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 576         else
 577                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 578 #endif
 579
 580         /* Wait for command completion */
 581 #ifdef CONFIG_SYS_LOW_RES_TIMER
 582         reset_timer();
 583 #endif
 584         start = get_timer (0);
 585         WATCHDOG_RESET();
 586         while (flash_is_busy (info, sector)) {
 587                 if (get_timer (start) > tout) {
 588                         printf ("Flash %s timeout at address %lx data %lx\n",
 589                                 prompt, info->start[sector],
 590                                 flash_read_long (info, sector, 0));
 591                         flash_write_cmd (info, sector, 0, info->cmd_reset);
 592                         return ERR_TIMOUT;
 593                 }
 594                 udelay (1);             /* also triggers watchdog */
 595         }
 596         return ERR_OK;
 597 }
 598
 599 /*-----------------------------------------------------------------------
 600  * Wait for XSR.7 to be set, if it times out print an error, otherwise
 601  * do a full status check.
 602  *
 603  * This routine sets the flash to read-array mode.
 604  */
 605 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 606                                     ulong tout, char *prompt)
 607 {
 608         int retcode;
 609
 610         retcode = flash_status_check (info, sector, tout, prompt);
 611         switch (info->vendor) {
 612         case CFI_CMDSET_INTEL_PROG_REGIONS:
 613         case CFI_CMDSET_INTEL_EXTENDED:
 614         case CFI_CMDSET_INTEL_STANDARD:
 615                 if ((retcode != ERR_OK)
 616                     && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 617                         retcode = ERR_INVAL;
 618                         printf ("Flash %s error at address %lx\n", prompt,
 619                                 info->start[sector]);
 620                         if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS |
 621                                          FLASH_STATUS_PSLBS)) {
 622                                 puts ("Command Sequence Error.\n");
 623                         } else if (flash_isset (info, sector, 0,
 624                                                 FLASH_STATUS_ECLBS)) {
 625                                 puts ("Block Erase Error.\n");
 626                                 retcode = ERR_NOT_ERASED;
 627                         } else if (flash_isset (info, sector, 0,
 628                                                 FLASH_STATUS_PSLBS)) {
 629                                 puts ("Locking Error\n");
 630                         }
 631                         if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
 632                                 puts ("Block locked.\n");
 633                                 retcode = ERR_PROTECTED;
 634                         }
 635                         if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
 636                                 puts ("Vpp Low Error.\n");
 637                 }
 638                 flash_write_cmd (info, sector, 0, info->cmd_reset);
 639                 udelay(1);
 640                 break;
 641         default:
 642                 break;
 643         }
 644         return retcode;
 645 }
 646
 647 static int use_flash_status_poll(flash_info_t *info)
 648 {
 649 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 650         if (info->vendor == CFI_CMDSET_AMD_EXTENDED ||
 651             info->vendor == CFI_CMDSET_AMD_STANDARD)
 652                 return 1;
 653 #endif
 654         return 0;
 655 }
 656
 657 static int flash_status_poll(flash_info_t *info, void *src, void *dst,
 658                              ulong tout, char *prompt)
 659 {
 660 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 661         ulong start;
 662         int ready;
 663
 664 #if CONFIG_SYS_HZ != 1000
 665         if ((ulong)CONFIG_SYS_HZ > 100000)
 666                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 667         else
 668                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 669 #endif
 670
 671         /* Wait for command completion */
 672 #ifdef CONFIG_SYS_LOW_RES_TIMER
 673         reset_timer();
 674 #endif
 675         start = get_timer(0);
 676         WATCHDOG_RESET();
 677         while (1) {
 678                 switch (info->portwidth) {
 679                 case FLASH_CFI_8BIT:
 680                         ready = flash_read8(dst) == flash_read8(src);
 681                         break;
 682                 case FLASH_CFI_16BIT:
 683                         ready = flash_read16(dst) == flash_read16(src);
 684                         break;
 685                 case FLASH_CFI_32BIT:
 686                         ready = flash_read32(dst) == flash_read32(src);
 687                         break;
 688                 case FLASH_CFI_64BIT:
 689                         ready = flash_read64(dst) == flash_read64(src);
 690                         break;
 691                 default:
 692                         ready = 0;
 693                         break;
 694                 }
 695                 if (ready)
 696                         break;
 697                 if (get_timer(start) > tout) {
 698                         printf("Flash %s timeout at address %lx data %lx\n",
 699                                prompt, (ulong)dst, (ulong)flash_read8(dst));
 700                         return ERR_TIMOUT;
 701                 }
 702                 udelay(1);              /* also triggers watchdog */
 703         }
 704 #endif /* CONFIG_SYS_CFI_FLASH_STATUS_POLL */
 705         return ERR_OK;
 706 }
 707
 708 /*-----------------------------------------------------------------------
 709  */
 710 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 711 {
 712 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 713         unsigned short  w;
 714         unsigned int    l;
 715         unsigned long long ll;
 716 #endif
 717
 718         switch (info->portwidth) {
 719         case FLASH_CFI_8BIT:
 720                 cword->c = c;
 721                 break;
 722         case FLASH_CFI_16BIT:
 723 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 724                 w = c;
 725                 w <<= 8;
 726                 cword->w = (cword->w >> 8) | w;
 727 #else
 728                 cword->w = (cword->w << 8) | c;
 729 #endif
 730                 break;
 731         case FLASH_CFI_32BIT:
 732 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 733                 l = c;
 734                 l <<= 24;
 735                 cword->l = (cword->l >> 8) | l;
 736 #else
 737                 cword->l = (cword->l << 8) | c;
 738 #endif
 739                 break;
 740         case FLASH_CFI_64BIT:
 741 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 742                 ll = c;
 743                 ll <<= 56;
 744                 cword->ll = (cword->ll >> 8) | ll;
 745 #else
 746                 cword->ll = (cword->ll << 8) | c;
 747 #endif
 748                 break;
 749         }
 750 }
 751
 752 /*
 753  * Loop through the sector table starting from the previously found sector.
 754  * Searches forwards or backwards, dependent on the passed address.
 755  */
 756 static flash_sect_t find_sector (flash_info_t * info, ulong addr)
 757 {
 758         static flash_sect_t saved_sector; /* previously found sector */
 759         flash_sect_t sector = saved_sector;
 760
 761         while ((info->start[sector] < addr)
 762                         && (sector < info->sector_count - 1))
 763                 sector++;
 764         while ((info->start[sector] > addr) && (sector > 0))
 765                 /*
 766                  * also decrements the sector in case of an overshot
 767                  * in the first loop
 768                  */
 769                 sector--;
 770
 771         saved_sector = sector;
 772         return sector;
 773 }
 774
 775 /*-----------------------------------------------------------------------
 776  */
 777 static int flash_write_cfiword (flash_info_t * info, ulong dest,
 778                                 cfiword_t cword)
 779 {
 780         void *dstaddr = (void *)dest;
 781         int flag;
 782         flash_sect_t sect = 0;
 783         char sect_found = 0;
 784
 785         /* Check if Flash is (sufficiently) erased */
 786         switch (info->portwidth) {
 787         case FLASH_CFI_8BIT:
 788                 debug("%s: 8-bit 0x%02x\n", __func__, cword.c);
 789                 flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
 790                 break;
 791         case FLASH_CFI_16BIT:
 792                 debug("%s: 16-bit 0x%04x\n", __func__, cword.w);
 793                 flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
 794                 break;
 795         case FLASH_CFI_32BIT:
 796                 debug("%s: 32-bit 0x%08lx\n", __func__, cword.l);
 797                 flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
 798                 break;
 799         case FLASH_CFI_64BIT:
 800                 flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
 801                 break;
 802         default:
 803                 flag = 0;
 804                 break;
 805         }
 806         if (!flag)
 807                 return ERR_NOT_ERASED;
 808
 809         /* Disable interrupts which might cause a timeout here */
 810         flag = disable_interrupts ();
 811
 812         switch (info->vendor) {
 813         case CFI_CMDSET_INTEL_PROG_REGIONS:
 814         case CFI_CMDSET_INTEL_EXTENDED:
 815         case CFI_CMDSET_INTEL_STANDARD:
 816                 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
 817                 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
 818                 break;
 819         case CFI_CMDSET_AMD_EXTENDED:
 820         case CFI_CMDSET_AMD_STANDARD:
 821                 sect = find_sector(info, dest);
 822                 flash_unlock_seq (info, sect);
 823                 flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE);
 824                 sect_found = 1;
 825                 break;
 826 #ifdef CONFIG_FLASH_CFI_LEGACY
 827         case CFI_CMDSET_AMD_LEGACY:
 828                 sect = find_sector(info, dest);
 829                 flash_unlock_seq (info, 0);
 830                 flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_WRITE);
 831                 sect_found = 1;
 832                 break;
 833 #endif
 834         }
 835
 836         switch (info->portwidth) {
 837         case FLASH_CFI_8BIT:
 838                 flash_write8(cword.c, dstaddr);
 839                 break;
 840         case FLASH_CFI_16BIT:
 841                 flash_write16(cword.w, dstaddr);
 842                 break;
 843         case FLASH_CFI_32BIT:
 844                 flash_write32(cword.l, dstaddr);
 845                 break;
 846         case FLASH_CFI_64BIT:
 847                 flash_write64(cword.ll, dstaddr);
 848                 break;
 849         }
 850
 851         /* re-enable interrupts if necessary */
 852         if (flag)
 853                 enable_interrupts ();
 854
 855         if (!sect_found)
 856                 sect = find_sector (info, dest);
 857
 858         if (use_flash_status_poll(info))
 859                 return flash_status_poll(info, &cword, dstaddr,
 860                                          info->write_tout, "write");
 861         else
 862                 return flash_full_status_check(info, sect,
 863                                                info->write_tout, "write");
 864 }
 865
 866 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 867
 868 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
 869                                   int len)
 870 {
 871         flash_sect_t sector;
 872         int cnt;
 873         int retcode;
 874         void *src = cp;
 875         void *dst = (void *)dest;
 876         void *dst2 = dst;
 877         int flag = 1;
 878         uint offset = 0;
 879         unsigned int shift;
 880         uchar write_cmd;
 881
 882         switch (info->portwidth) {
 883         case FLASH_CFI_8BIT:
 884                 shift = 0;
 885                 break;
 886         case FLASH_CFI_16BIT:
 887                 shift = 1;
 888                 break;
 889         case FLASH_CFI_32BIT:
 890                 shift = 2;
 891                 break;
 892         case FLASH_CFI_64BIT:
 893                 shift = 3;
 894                 break;
 895         default:
 896                 retcode = ERR_INVAL;
 897                 goto out_unmap;
 898         }
 899
 900         cnt = len >> shift;
 901
 902         while ((cnt-- > 0) && (flag == 1)) {
 903                 switch (info->portwidth) {
 904                 case FLASH_CFI_8BIT:
 905                         flag = ((flash_read8(dst2) & flash_read8(src)) ==
 906                                 flash_read8(src));
 907                         src += 1, dst2 += 1;
 908                         break;
 909                 case FLASH_CFI_16BIT:
 910                         flag = ((flash_read16(dst2) & flash_read16(src)) ==
 911                                 flash_read16(src));
 912                         src += 2, dst2 += 2;
 913                         break;
 914                 case FLASH_CFI_32BIT:
 915                         flag = ((flash_read32(dst2) & flash_read32(src)) ==
 916                                 flash_read32(src));
 917                         src += 4, dst2 += 4;
 918                         break;
 919                 case FLASH_CFI_64BIT:
 920                         flag = ((flash_read64(dst2) & flash_read64(src)) ==
 921                                 flash_read64(src));
 922                         src += 8, dst2 += 8;
 923                         break;
 924                 }
 925         }
 926         if (!flag) {
 927                 retcode = ERR_NOT_ERASED;
 928                 goto out_unmap;
 929         }
 930
 931         src = cp;
 932         sector = find_sector (info, dest);
 933
 934         switch (info->vendor) {
 935         case CFI_CMDSET_INTEL_PROG_REGIONS:
 936         case CFI_CMDSET_INTEL_STANDARD:
 937         case CFI_CMDSET_INTEL_EXTENDED:
 938                 write_cmd = (info->vendor == CFI_CMDSET_INTEL_PROG_REGIONS) ?
 939                                         FLASH_CMD_WRITE_BUFFER_PROG : FLASH_CMD_WRITE_TO_BUFFER;
 940                 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 941                 flash_write_cmd (info, sector, 0, FLASH_CMD_READ_STATUS);
 942                 flash_write_cmd (info, sector, 0, write_cmd);
 943                 retcode = flash_status_check (info, sector,
 944                                               info->buffer_write_tout,
 945                                               "write to buffer");
 946                 if (retcode == ERR_OK) {
 947                         /* reduce the number of loops by the width of
 948                          * the port */
 949                         cnt = len >> shift;
 950                         flash_write_cmd (info, sector, 0, cnt - 1);
 951                         while (cnt-- > 0) {
 952                                 switch (info->portwidth) {
 953                                 case FLASH_CFI_8BIT:
 954                                         flash_write8(flash_read8(src), dst);
 955                                         src += 1, dst += 1;
 956                                         break;
 957                                 case FLASH_CFI_16BIT:
 958                                         flash_write16(flash_read16(src), dst);
 959                                         src += 2, dst += 2;
 960                                         break;
 961                                 case FLASH_CFI_32BIT:
 962                                         flash_write32(flash_read32(src), dst);
 963                                         src += 4, dst += 4;
 964                                         break;
 965                                 case FLASH_CFI_64BIT:
 966                                         flash_write64(flash_read64(src), dst);
 967                                         src += 8, dst += 8;
 968                                         break;
 969                                 default:
 970                                         retcode = ERR_INVAL;
 971                                         goto out_unmap;
 972                                 }
 973                         }
 974                         flash_write_cmd (info, sector, 0,
 975                                          FLASH_CMD_WRITE_BUFFER_CONFIRM);
 976                         retcode = flash_full_status_check (
 977                                 info, sector, info->buffer_write_tout,
 978                                 "buffer write");
 979                 }
 980
 981                 break;
 982
 983         case CFI_CMDSET_AMD_STANDARD:
 984         case CFI_CMDSET_AMD_EXTENDED:
 985                 flash_unlock_seq(info,0);
 986
 987 #ifdef CONFIG_FLASH_SPANSION_S29WS_N
 988                 offset = ((unsigned long)dst - info->start[sector]) >> shift;
 989 #endif
 990                 flash_write_cmd(info, sector, offset, AMD_CMD_WRITE_TO_BUFFER);
 991                 cnt = len >> shift;
 992                 flash_write_cmd(info, sector, offset, cnt - 1);
 993
 994                 switch (info->portwidth) {
 995                 case FLASH_CFI_8BIT:
 996                         while (cnt-- > 0) {
 997                                 flash_write8(flash_read8(src), dst);
 998                                 src += 1, dst += 1;
 999                         }
1000                         break;
1001                 case FLASH_CFI_16BIT:
1002                         while (cnt-- > 0) {
1003                                 flash_write16(flash_read16(src), dst);
1004                                 src += 2, dst += 2;
1005                         }
1006                         break;
1007                 case FLASH_CFI_32BIT:
1008                         while (cnt-- > 0) {
1009                                 flash_write32(flash_read32(src), dst);
1010                                 src += 4, dst += 4;
1011                         }
1012                         break;
1013                 case FLASH_CFI_64BIT:
1014                         while (cnt-- > 0) {
1015                                 flash_write64(flash_read64(src), dst);
1016                                 src += 8, dst += 8;
1017                         }
1018                         break;
1019                 default:
1020                         retcode = ERR_INVAL;
1021                         goto out_unmap;
1022                 }
1023
1024                 flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
1025                 if (use_flash_status_poll(info))
1026                         retcode = flash_status_poll(info, src - (1 << shift),
1027                                                     dst - (1 << shift),
1028                                                     info->buffer_write_tout,
1029                                                     "buffer write");
1030                 else
1031                         retcode = flash_full_status_check(info, sector,
1032                                                           info->buffer_write_tout,
1033                                                           "buffer write");
1034                 break;
1035
1036         default:
1037                 debug ("Unknown Command Set\n");
1038                 retcode = ERR_INVAL;
1039                 break;
1040         }
1041
1042 out_unmap:
1043         return retcode;
1044 }
1045 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1046
1047
1048 /*-----------------------------------------------------------------------
1049  */
1050 int flash_erase (flash_info_t * info, int s_first, int s_last)
1051 {
1052         int rcode = 0;
1053         int prot;
1054         flash_sect_t sect;
1055         int st;
1056
1057         debug("%s: erasing sectors %d to %d\n", __func__, s_first, s_last);
1058
1059         if (info->flash_id != FLASH_MAN_CFI) {
1060                 puts ("Can't erase unknown flash type - aborted\n");
1061                 return 1;
1062         }
1063         if ((s_first < 0) || (s_first > s_last)) {
1064                 puts ("- no sectors to erase\n");
1065                 return 1;
1066         }
1067
1068         prot = 0;
1069         for (sect = s_first; sect <= s_last; ++sect) {
1070                 if (info->protect[sect]) {
1071                         prot++;
1072                 }
1073         }
1074         if (prot) {
1075                 printf ("- Warning: %d protected sectors will not be erased!\n",
1076                         prot);
1077         } else if (flash_verbose) {
1078                 putc ('\n');
1079         }
1080
1081
1082         for (sect = s_first; sect <= s_last; sect++) {
1083                 if (ctrlc()) {
1084                         printf("\n");
1085                         return 1;
1086                 }
1087
1088                 if (info->protect[sect] == 0) { /* not protected */
1089 #ifdef CONFIG_SYS_FLASH_CHECK_BLANK_BEFORE_ERASE
1090                         int k;
1091                         int size;
1092                         int erased;
1093                         u32 *flash;
1094
1095                         /*
1096                          * Check if whole sector is erased
1097                          */
1098                         size = flash_sector_size(info, sect);
1099                         erased = 1;
1100                         flash = (u32 *)info->start[sect];
1101                         /* divide by 4 for longword access */
1102                         size = size >> 2;
1103                         for (k = 0; k < size; k++) {
1104                                 if (flash_read32(flash++) != 0xffffffff) {
1105                                         erased = 0;
1106                                         break;
1107                                 }
1108                         }
1109                         if (erased) {
1110                                 if (flash_verbose)
1111                                         putc(',');
1112                                 continue;
1113                         }
1114 #endif
1115                         switch (info->vendor) {
1116                         case CFI_CMDSET_INTEL_PROG_REGIONS:
1117                         case CFI_CMDSET_INTEL_STANDARD:
1118                         case CFI_CMDSET_INTEL_EXTENDED:
1119                                 flash_write_cmd (info, sect, 0,
1120                                                  FLASH_CMD_CLEAR_STATUS);
1121                                 flash_write_cmd (info, sect, 0,
1122                                                  FLASH_CMD_BLOCK_ERASE);
1123                                 flash_write_cmd (info, sect, 0,
1124                                                  FLASH_CMD_ERASE_CONFIRM);
1125                                 break;
1126                         case CFI_CMDSET_AMD_STANDARD:
1127                         case CFI_CMDSET_AMD_EXTENDED:
1128                                 flash_unlock_seq (info, sect);
1129                                 flash_write_cmd (info, sect,
1130                                                 info->addr_unlock1,
1131                                                 AMD_CMD_ERASE_START);
1132                                 flash_unlock_seq (info, sect);
1133                                 flash_write_cmd (info, sect, 0,
1134                                                  info->cmd_erase_sector);
1135                                 break;
1136 #ifdef CONFIG_FLASH_CFI_LEGACY
1137                         case CFI_CMDSET_AMD_LEGACY:
1138                                 flash_unlock_seq (info, 0);
1139                                 flash_write_cmd (info, 0, info->addr_unlock1,
1140                                                 AMD_CMD_ERASE_START);
1141                                 flash_unlock_seq (info, 0);
1142                                 flash_write_cmd (info, sect, 0,
1143                                                 AMD_CMD_ERASE_SECTOR);
1144                                 break;
1145 #endif
1146                         default:
1147                                 debug ("Unkown flash vendor %d\n",
1148                                        info->vendor);
1149                                 break;
1150                         }
1151
1152                         if (use_flash_status_poll(info)) {
1153                                 cfiword_t cword;
1154                                 void *dest;
1155                                 cword.ll = 0xffffffffffffffffULL;
1156                                 dest = flash_map(info, sect, 0);
1157                                 st = flash_status_poll(info, &cword, dest,
1158                                                        info->erase_blk_tout, "erase");
1159                                 flash_unmap(info, sect, 0, dest);
1160                         } else
1161                                 st = flash_full_status_check(info, sect,
1162                                                              info->erase_blk_tout,
1163                                                              "erase");
1164                         if (st)
1165                                 rcode = 1;
1166                         else if (flash_verbose)
1167                                 putc ('.');
1168                 } else {
1169                         debug("\nSector %d is protected.\n",
1170                                                 info->protect[sect]);
1171                 }
1172         }
1173
1174         if (flash_verbose)
1175                 puts (" done\n");
1176
1177         return rcode;
1178 }
1179
1180 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1181 static int sector_erased(flash_info_t *info, int i)
1182 {
1183         int k;
1184         int size;
1185         u32 *flash;
1186
1187         /*
1188          * Check if whole sector is erased
1189          */
1190         size = flash_sector_size(info, i);
1191         flash = (u32 *)info->start[i];
1192         /* divide by 4 for longword access */
1193         size = size >> 2;
1194
1195         for (k = 0; k < size; k++) {
1196                 if (flash_read32(flash++) != 0xffffffff)
1197                         return 0;       /* not erased */
1198         }
1199
1200         return 1;                       /* erased */
1201 }
1202 #endif /* CONFIG_SYS_FLASH_EMPTY_INFO */
1203
1204 void flash_print_info (flash_info_t * info)
1205 {
1206         int i;
1207
1208         if (info->flash_id != FLASH_MAN_CFI) {
1209                 puts ("missing or unknown FLASH type\n");
1210                 return;
1211         }
1212
1213         printf ("%s flash (%d x %d)",
1214                 info->name,
1215                 (info->portwidth << 3), (info->chipwidth << 3));
1216         if (info->size < 1024*1024)
1217                 printf ("  Size: %ld kB in %d Sectors\n",
1218                         info->size >> 10, info->sector_count);
1219         else
1220                 printf ("  Size: %ld MB in %d Sectors\n",
1221                         info->size >> 20, info->sector_count);
1222         printf ("  ");
1223         switch (info->vendor) {
1224                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1225                         printf ("Intel Prog Regions");
1226                         break;
1227                 case CFI_CMDSET_INTEL_STANDARD:
1228                         printf ("Intel Standard");
1229                         break;
1230                 case CFI_CMDSET_INTEL_EXTENDED:
1231                         printf ("Intel Extended");
1232                         break;
1233                 case CFI_CMDSET_AMD_STANDARD:
1234                         printf ("AMD Standard");
1235                         break;
1236                 case CFI_CMDSET_AMD_EXTENDED:
1237                         printf ("AMD Extended");
1238                         break;
1239 #ifdef CONFIG_FLASH_CFI_LEGACY
1240                 case CFI_CMDSET_AMD_LEGACY:
1241                         printf ("AMD Legacy");
1242                         break;
1243 #endif
1244                 default:
1245                         printf ("Unknown (%d)", info->vendor);
1246                         break;
1247         }
1248         printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x",
1249                 info->manufacturer_id);
1250         printf (info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1251                 info->device_id);
1252         if ((info->device_id & 0xff) == 0x7E) {
1253                 printf(info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1254                 info->device_id2);
1255         }
1256         if ((info->vendor == CFI_CMDSET_AMD_STANDARD) && (info->legacy_unlock))
1257                 printf("\n  Advanced Sector Protection (PPB) enabled");
1258         printf ("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
1259                 info->erase_blk_tout,
1260                 info->write_tout);
1261         if (info->buffer_size > 1) {
1262                 printf ("  Buffer write timeout: %ld ms, "
1263                         "buffer size: %d bytes\n",
1264                 info->buffer_write_tout,
1265                 info->buffer_size);
1266         }
1267
1268         puts ("\n  Sector Start Addresses:");
1269         for (i = 0; i < info->sector_count; ++i) {
1270                 if (ctrlc())
1271                         break;
1272                 if ((i % 5) == 0)
1273                         putc('\n');
1274 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1275                 /* print empty and read-only info */
1276                 printf ("  %08lX %c %s ",
1277                         info->start[i],
1278                         sector_erased(info, i) ? 'E' : ' ',
1279                         info->protect[i] ? "RO" : "  ");
1280 #else   /* ! CONFIG_SYS_FLASH_EMPTY_INFO */
1281                 printf ("  %08lX   %s ",
1282                         info->start[i],
1283                         info->protect[i] ? "RO" : "  ");
1284 #endif
1285         }
1286         putc ('\n');
1287         return;
1288 }
1289
1290 /*-----------------------------------------------------------------------
1291  * This is used in a few places in write_buf() to show programming
1292  * progress.  Making it a function is nasty because it needs to do side
1293  * effect updates to digit and dots.  Repeated code is nasty too, so
1294  * we define it once here.
1295  */
1296 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1297 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub) \
1298         if (flash_verbose) { \
1299                 dots -= dots_sub; \
1300                 if ((scale > 0) && (dots <= 0)) { \
1301                         if ((digit % 5) == 0) \
1302                                 printf ("%d", digit / 5); \
1303                         else \
1304                                 putc ('.'); \
1305                         digit--; \
1306                         dots += scale; \
1307                 } \
1308         }
1309 #else
1310 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub)
1311 #endif
1312
1313 /*-----------------------------------------------------------------------
1314  * Copy memory to flash, returns:
1315  * 0 - OK
1316  * 1 - write timeout
1317  * 2 - Flash not erased
1318  */
1319 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
1320 {
1321         ulong wp;
1322         uchar *p;
1323         int aln;
1324         cfiword_t cword;
1325         int i, rc;
1326 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1327         int buffered_size;
1328 #endif
1329 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1330         int digit = CONFIG_FLASH_SHOW_PROGRESS;
1331         int scale = 0;
1332         int dots  = 0;
1333
1334         /*
1335          * Suppress if there are fewer than CONFIG_FLASH_SHOW_PROGRESS writes.
1336          */
1337         if (cnt >= CONFIG_FLASH_SHOW_PROGRESS) {
1338                 scale = (int)((cnt + CONFIG_FLASH_SHOW_PROGRESS - 1) /
1339                         CONFIG_FLASH_SHOW_PROGRESS);
1340         }
1341 #endif
1342
1343         /* get lower aligned address */
1344         wp = (addr & ~(info->portwidth - 1));
1345
1346         /* handle unaligned start */
1347         if ((aln = addr - wp) != 0) {
1348                 cword.l = 0;
1349                 p = (uchar *)wp;
1350                 for (i = 0; i < aln; ++i)
1351                         flash_add_byte (info, &cword, flash_read8(p + i));
1352
1353                 for (; (i < info->portwidth) && (cnt > 0); i++) {
1354                         flash_add_byte (info, &cword, *src++);
1355                         cnt--;
1356                 }
1357                 for (; (cnt == 0) && (i < info->portwidth); ++i)
1358                         flash_add_byte (info, &cword, flash_read8(p + i));
1359
1360                 rc = flash_write_cfiword (info, wp, cword);
1361                 if (rc != 0)
1362                         return rc;
1363
1364                 wp += i;
1365                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1366         }
1367
1368         /* handle the aligned part */
1369 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1370         buffered_size = (info->portwidth / info->chipwidth);
1371         buffered_size *= info->buffer_size;
1372         while (cnt >= info->portwidth) {
1373                 /* prohibit buffer write when buffer_size is 1 */
1374                 if (info->buffer_size == 1) {
1375                         cword.l = 0;
1376                         for (i = 0; i < info->portwidth; i++)
1377                                 flash_add_byte (info, &cword, *src++);
1378                         if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1379                                 return rc;
1380                         wp += info->portwidth;
1381                         cnt -= info->portwidth;
1382                         continue;
1383                 }
1384
1385                 /* write buffer until next buffered_size aligned boundary */
1386                 i = buffered_size - (wp % buffered_size);
1387                 if (i > cnt)
1388                         i = cnt;
1389                 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
1390                         return rc;
1391                 i -= i & (info->portwidth - 1);
1392                 wp += i;
1393                 src += i;
1394                 cnt -= i;
1395                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1396                 /* Only check every once in a while */
1397                 if ((cnt & 0xFFFF) < buffered_size && ctrlc())
1398                         return ERR_ABORTED;
1399         }
1400 #else
1401         while (cnt >= info->portwidth) {
1402                 cword.l = 0;
1403                 for (i = 0; i < info->portwidth; i++) {
1404                         flash_add_byte (info, &cword, *src++);
1405                 }
1406                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1407                         return rc;
1408                 wp += info->portwidth;
1409                 cnt -= info->portwidth;
1410                 FLASH_SHOW_PROGRESS(scale, dots, digit, info->portwidth);
1411                 /* Only check every once in a while */
1412                 if ((cnt & 0xFFFF) < info->portwidth && ctrlc())
1413                         return ERR_ABORTED;
1414         }
1415 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1416
1417         if (cnt == 0) {
1418                 return (0);
1419         }
1420
1421         /*
1422          * handle unaligned tail bytes
1423          */
1424         cword.l = 0;
1425         p = (uchar *)wp;
1426         for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
1427                 flash_add_byte (info, &cword, *src++);
1428                 --cnt;
1429         }
1430         for (; i < info->portwidth; ++i)
1431                 flash_add_byte (info, &cword, flash_read8(p + i));
1432
1433         return flash_write_cfiword (info, wp, cword);
1434 }
1435
1436 static inline int manufact_match(flash_info_t *info, u32 manu)
1437 {
1438         return info->manufacturer_id == ((manu & FLASH_VENDMASK) >> 16);
1439 }
1440
1441 /*-----------------------------------------------------------------------
1442  */
1443 #ifdef CONFIG_SYS_FLASH_PROTECTION
1444
1445 static int cfi_protect_bugfix(flash_info_t *info, long sector, int prot)
1446 {
1447         if (manufact_match(info, INTEL_MANUFACT)
1448             && info->device_id == NUMONYX_256MBIT) {
1449                 /*
1450                  * see errata called
1451                  * "Numonyx Axcell P33/P30 Specification Update" :)
1452                  */
1453                 flash_write_cmd(info, sector, 0, FLASH_CMD_READ_ID);
1454                 if (!flash_isequal(info, sector, FLASH_OFFSET_PROTECT,
1455                                    prot)) {
1456                         /*
1457                          * cmd must come before FLASH_CMD_PROTECT + 20us
1458                          * Disable interrupts which might cause a timeout here.
1459                          */
1460                         int flag = disable_interrupts();
1461                         unsigned short cmd;
1462
1463                         if (prot)
1464                                 cmd = FLASH_CMD_PROTECT_SET;
1465                         else
1466                                 cmd = FLASH_CMD_PROTECT_CLEAR;
1467                                 flash_write_cmd(info, sector, 0,
1468                                           FLASH_CMD_PROTECT);
1469                         flash_write_cmd(info, sector, 0, cmd);
1470                         /* re-enable interrupts if necessary */
1471                         if (flag)
1472                                 enable_interrupts();
1473                 }
1474                 return 1;
1475         }
1476         return 0;
1477 }
1478
1479 int flash_real_protect (flash_info_t * info, long sector, int prot)
1480 {
1481         int retcode = 0;
1482
1483         switch (info->vendor) {
1484                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1485                 case CFI_CMDSET_INTEL_STANDARD:
1486                 case CFI_CMDSET_INTEL_EXTENDED:
1487                         if (!cfi_protect_bugfix(info, sector, prot)) {
1488                                 flash_write_cmd(info, sector, 0,
1489                                          FLASH_CMD_CLEAR_STATUS);
1490                                 flash_write_cmd(info, sector, 0,
1491                                         FLASH_CMD_PROTECT);
1492                                 if (prot)
1493                                         flash_write_cmd(info, sector, 0,
1494                                                 FLASH_CMD_PROTECT_SET);
1495                                 else
1496                                         flash_write_cmd(info, sector, 0,
1497                                                 FLASH_CMD_PROTECT_CLEAR);
1498
1499                         }
1500                         break;
1501                 case CFI_CMDSET_AMD_EXTENDED:
1502                 case CFI_CMDSET_AMD_STANDARD:
1503                         /* U-Boot only checks the first byte */
1504                         if (manufact_match(info, ATM_MANUFACT)) {
1505                                 if (prot) {
1506                                         flash_unlock_seq (info, 0);
1507                                         flash_write_cmd (info, 0,
1508                                                         info->addr_unlock1,
1509                                                         ATM_CMD_SOFTLOCK_START);
1510                                         flash_unlock_seq (info, 0);
1511                                         flash_write_cmd (info, sector, 0,
1512                                                         ATM_CMD_LOCK_SECT);
1513                                 } else {
1514                                         flash_write_cmd (info, 0,
1515                                                         info->addr_unlock1,
1516                                                         AMD_CMD_UNLOCK_START);
1517                                         if (info->device_id == ATM_ID_BV6416)
1518                                                 flash_write_cmd (info, sector,
1519                                                         0, ATM_CMD_UNLOCK_SECT);
1520                                 }
1521                         }
1522                         if (info->legacy_unlock) {
1523                                 int flag = disable_interrupts();
1524                                 int lock_flag;
1525
1526                                 flash_unlock_seq(info, 0);
1527                                 flash_write_cmd(info, 0, info->addr_unlock1,
1528                                                 AMD_CMD_SET_PPB_ENTRY);
1529                                 lock_flag = flash_isset(info, sector, 0, 0x01);
1530                                 if (prot) {
1531                                         if (lock_flag) {
1532                                                 flash_write_cmd(info, sector, 0,
1533                                                         AMD_CMD_PPB_LOCK_BC1);
1534                                                 flash_write_cmd(info, sector, 0,
1535                                                         AMD_CMD_PPB_LOCK_BC2);
1536                                         }
1537                                         debug("sector %ld %slocked\n", sector,
1538                                                 lock_flag ? "" : "already ");
1539                                 } else {
1540                                         if (!lock_flag) {
1541                                                 debug("unlock %ld\n", sector);
1542                                                 flash_write_cmd(info, 0, 0,
1543                                                         AMD_CMD_PPB_UNLOCK_BC1);
1544                                                 flash_write_cmd(info, 0, 0,
1545                                                         AMD_CMD_PPB_UNLOCK_BC2);
1546                                         }
1547                                         debug("sector %ld %sunlocked\n", sector,
1548                                                 !lock_flag ? "" : "already ");
1549                                 }
1550                                 if (flag)
1551                                         enable_interrupts();
1552
1553                                 if (flash_status_check(info, sector,
1554                                                 info->erase_blk_tout,
1555                                                 prot ? "protect" : "unprotect"))
1556                                         printf("status check error\n");
1557
1558                                 flash_write_cmd(info, 0, 0,
1559                                                 AMD_CMD_SET_PPB_EXIT_BC1);
1560                                 flash_write_cmd(info, 0, 0,
1561                                                 AMD_CMD_SET_PPB_EXIT_BC2);
1562                         }
1563                         break;
1564 #ifdef CONFIG_FLASH_CFI_LEGACY
1565                 case CFI_CMDSET_AMD_LEGACY:
1566                         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1567                         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
1568                         if (prot)
1569                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
1570                         else
1571                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
1572 #endif
1573         };
1574
1575         /*
1576          * Flash needs to be in status register read mode for
1577          * flash_full_status_check() to work correctly
1578          */
1579         flash_write_cmd(info, sector, 0, FLASH_CMD_READ_STATUS);
1580         if ((retcode =
1581              flash_full_status_check (info, sector, info->erase_blk_tout,
1582                                       prot ? "protect" : "unprotect")) == 0) {
1583
1584                 info->protect[sector] = prot;
1585
1586                 /*
1587                  * On some of Intel's flash chips (marked via legacy_unlock)
1588                  * unprotect unprotects all locking.
1589                  */
1590                 if ((prot == 0) && (info->legacy_unlock)) {
1591                         flash_sect_t i;
1592
1593                         for (i = 0; i < info->sector_count; i++) {
1594                                 if (info->protect[i])
1595                                         flash_real_protect (info, i, 1);
1596                         }
1597                 }
1598         }
1599         return retcode;
1600 }
1601
1602 /*-----------------------------------------------------------------------
1603  * flash_read_user_serial - read the OneTimeProgramming cells
1604  */
1605 void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
1606                              int len)
1607 {
1608         uchar *src;
1609         uchar *dst;
1610
1611         dst = buffer;
1612         src = flash_map (info, 0, FLASH_OFFSET_USER_PROTECTION);
1613         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1614         memcpy (dst, src + offset, len);
1615         flash_write_cmd (info, 0, 0, info->cmd_reset);
1616         udelay(1);
1617         flash_unmap(info, 0, FLASH_OFFSET_USER_PROTECTION, src);
1618 }
1619
1620 /*
1621  * flash_read_factory_serial - read the device Id from the protection area
1622  */
1623 void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
1624                                 int len)
1625 {
1626         uchar *src;
1627
1628         src = flash_map (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
1629         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1630         memcpy (buffer, src + offset, len);
1631         flash_write_cmd (info, 0, 0, info->cmd_reset);
1632         udelay(1);
1633         flash_unmap(info, 0, FLASH_OFFSET_INTEL_PROTECTION, src);
1634 }
1635
1636 #endif /* CONFIG_SYS_FLASH_PROTECTION */
1637
1638 /*-----------------------------------------------------------------------
1639  * Reverse the order of the erase regions in the CFI QRY structure.
1640  * This is needed for chips that are either a) correctly detected as
1641  * top-boot, or b) buggy.
1642  */
1643 static void cfi_reverse_geometry(struct cfi_qry *qry)
1644 {
1645         unsigned int i, j;
1646         u32 tmp;
1647
1648         for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) {
1649                 tmp = qry->erase_region_info[i];
1650                 qry->erase_region_info[i] = qry->erase_region_info[j];
1651                 qry->erase_region_info[j] = tmp;
1652         }
1653 }
1654
1655 /*-----------------------------------------------------------------------
1656  * read jedec ids from device and set corresponding fields in info struct
1657  *
1658  * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
1659  *
1660  */
1661 static void cmdset_intel_read_jedec_ids(flash_info_t *info)
1662 {
1663         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1664         udelay(1);
1665         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1666         udelay(1000); /* some flash are slow to respond */
1667         info->manufacturer_id = flash_read_uchar (info,
1668                                         FLASH_OFFSET_MANUFACTURER_ID);
1669         info->device_id = (info->chipwidth == FLASH_CFI_16BIT) ?
1670                         flash_read_word (info, FLASH_OFFSET_DEVICE_ID) :
1671                         flash_read_uchar (info, FLASH_OFFSET_DEVICE_ID);
1672         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1673 }
1674
1675 static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry)
1676 {
1677         info->cmd_reset = FLASH_CMD_RESET;
1678
1679         cmdset_intel_read_jedec_ids(info);
1680         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1681
1682 #ifdef CONFIG_SYS_FLASH_PROTECTION
1683         /* read legacy lock/unlock bit from intel flash */
1684         if (info->ext_addr) {
1685                 info->legacy_unlock = flash_read_uchar (info,
1686                                 info->ext_addr + 5) & 0x08;
1687         }
1688 #endif
1689
1690         return 0;
1691 }
1692
1693 static void cmdset_amd_read_jedec_ids(flash_info_t *info)
1694 {
1695         ushort bankId = 0;
1696         uchar  manuId;
1697
1698         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1699         flash_unlock_seq(info, 0);
1700         flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
1701         udelay(1000); /* some flash are slow to respond */
1702
1703         manuId = flash_read_uchar (info, FLASH_OFFSET_MANUFACTURER_ID);
1704         /* JEDEC JEP106Z specifies ID codes up to bank 7 */
1705         while (manuId == FLASH_CONTINUATION_CODE && bankId < 0x800) {
1706                 bankId += 0x100;
1707                 manuId = flash_read_uchar (info,
1708                         bankId | FLASH_OFFSET_MANUFACTURER_ID);
1709         }
1710         info->manufacturer_id = manuId;
1711
1712         switch (info->chipwidth){
1713         case FLASH_CFI_8BIT:
1714                 info->device_id = flash_read_uchar (info,
1715                                                 FLASH_OFFSET_DEVICE_ID);
1716                 if (info->device_id == 0x7E) {
1717                         /* AMD 3-byte (expanded) device ids */
1718                         info->device_id2 = flash_read_uchar (info,
1719                                                 FLASH_OFFSET_DEVICE_ID2);
1720                         info->device_id2 <<= 8;
1721                         info->device_id2 |= flash_read_uchar (info,
1722                                                 FLASH_OFFSET_DEVICE_ID3);
1723                 }
1724                 break;
1725         case FLASH_CFI_16BIT:
1726                 info->device_id = flash_read_word (info,
1727                                                 FLASH_OFFSET_DEVICE_ID);
1728                 if ((info->device_id & 0xff) == 0x7E) {
1729                         /* AMD 3-byte (expanded) device ids */
1730                         info->device_id2 = flash_read_uchar (info,
1731                                                 FLASH_OFFSET_DEVICE_ID2);
1732                         info->device_id2 <<= 8;
1733                         info->device_id2 |= flash_read_uchar (info,
1734                                                 FLASH_OFFSET_DEVICE_ID3);
1735                 }
1736                 break;
1737         default:
1738                 break;
1739         }
1740         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1741         udelay(1);
1742 }
1743
1744 static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry)
1745 {
1746         info->cmd_reset = AMD_CMD_RESET;
1747         info->cmd_erase_sector = AMD_CMD_ERASE_SECTOR;
1748
1749         cmdset_amd_read_jedec_ids(info);
1750         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1751
1752 #ifdef CONFIG_SYS_FLASH_PROTECTION
1753         if (info->ext_addr) {
1754                 /* read sector protect/unprotect scheme (at 0x49) */
1755                 if (flash_read_uchar(info, info->ext_addr + 9) == 0x8)
1756                         info->legacy_unlock = 1;
1757         }
1758 #endif
1759
1760         return 0;
1761 }
1762
1763 #ifdef CONFIG_FLASH_CFI_LEGACY
1764 static void flash_read_jedec_ids (flash_info_t * info)
1765 {
1766         info->manufacturer_id = 0;
1767         info->device_id       = 0;
1768         info->device_id2      = 0;
1769
1770         switch (info->vendor) {
1771         case CFI_CMDSET_INTEL_PROG_REGIONS:
1772         case CFI_CMDSET_INTEL_STANDARD:
1773         case CFI_CMDSET_INTEL_EXTENDED:
1774                 cmdset_intel_read_jedec_ids(info);
1775                 break;
1776         case CFI_CMDSET_AMD_STANDARD:
1777         case CFI_CMDSET_AMD_EXTENDED:
1778                 cmdset_amd_read_jedec_ids(info);
1779                 break;
1780         default:
1781                 break;
1782         }
1783 }
1784
1785 /*-----------------------------------------------------------------------
1786  * Call board code to request info about non-CFI flash.
1787  * board_flash_get_legacy needs to fill in at least:
1788  * info->portwidth, info->chipwidth and info->interface for Jedec probing.
1789  */
1790 static int flash_detect_legacy(phys_addr_t base, int banknum)
1791 {
1792         flash_info_t *info = &flash_info[banknum];
1793
1794         if (board_flash_get_legacy(base, banknum, info)) {
1795                 /* board code may have filled info completely. If not, we
1796                    use JEDEC ID probing. */
1797                 if (!info->vendor) {
1798                         int modes[] = {
1799                                 CFI_CMDSET_AMD_STANDARD,
1800                                 CFI_CMDSET_INTEL_STANDARD
1801                         };
1802                         int i;
1803
1804                         for (i = 0; i < sizeof(modes) / sizeof(modes[0]); i++) {
1805                                 info->vendor = modes[i];
1806                                 info->start[0] =
1807                                         (ulong)map_physmem(base,
1808                                                            info->portwidth,
1809                                                            MAP_NOCACHE);
1810                                 if (info->portwidth == FLASH_CFI_8BIT
1811                                         && info->interface == FLASH_CFI_X8X16) {
1812                                         info->addr_unlock1 = 0x2AAA;
1813                                         info->addr_unlock2 = 0x5555;
1814                                 } else {
1815                                         info->addr_unlock1 = 0x5555;
1816                                         info->addr_unlock2 = 0x2AAA;
1817                                 }
1818                                 flash_read_jedec_ids(info);
1819                                 debug("JEDEC PROBE: ID %x %x %x\n",
1820                                                 info->manufacturer_id,
1821                                                 info->device_id,
1822                                                 info->device_id2);
1823                                 if (jedec_flash_match(info, info->start[0]))
1824                                         break;
1825                                 else
1826                                         unmap_physmem((void *)info->start[0],
1827                                                       MAP_NOCACHE);
1828                         }
1829                 }
1830
1831                 switch(info->vendor) {
1832                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1833                 case CFI_CMDSET_INTEL_STANDARD:
1834                 case CFI_CMDSET_INTEL_EXTENDED:
1835                         info->cmd_reset = FLASH_CMD_RESET;
1836                         break;
1837                 case CFI_CMDSET_AMD_STANDARD:
1838                 case CFI_CMDSET_AMD_EXTENDED:
1839                 case CFI_CMDSET_AMD_LEGACY:
1840                         info->cmd_reset = AMD_CMD_RESET;
1841                         break;
1842                 }
1843                 info->flash_id = FLASH_MAN_CFI;
1844                 return 1;
1845         }
1846         return 0; /* use CFI */
1847 }
1848 #else
1849 static inline int flash_detect_legacy(phys_addr_t base, int banknum)
1850 {
1851         return 0; /* use CFI */
1852 }
1853 #endif
1854
1855 /*-----------------------------------------------------------------------
1856  * detect if flash is compatible with the Common Flash Interface (CFI)
1857  * http://www.jedec.org/download/search/jesd68.pdf
1858  */
1859 static void flash_read_cfi (flash_info_t *info, void *buf,
1860                 unsigned int start, size_t len)
1861 {
1862         u8 *p = buf;
1863         unsigned int i;
1864
1865         for (i = 0; i < len; i++)
1866                 p[i] = flash_read_uchar(info, start + (i * 2));
1867 }
1868
1869 static void __flash_cmd_reset(flash_info_t *info)
1870 {
1871         /*
1872          * We do not yet know what kind of commandset to use, so we issue
1873          * the reset command in both Intel and AMD variants, in the hope
1874          * that AMD flash roms ignore the Intel command.
1875          */
1876         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1877         udelay(1);
1878         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1879 }
1880 void flash_cmd_reset(flash_info_t *info)
1881         __attribute__((weak,alias("__flash_cmd_reset")));
1882
1883 static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1884 {
1885         int cfi_offset;
1886
1887         for (cfi_offset=0;
1888              cfi_offset < sizeof(flash_offset_cfi) / sizeof(uint);
1889              cfi_offset++) {
1890                 /* Issue FLASH reset command */
1891                 flash_cmd_reset(info);
1892                 flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset],
1893                                  FLASH_CMD_CFI);
1894                 if (flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP, 'Q') &&
1895                         flash_isequal(info, 0,
1896                                         FLASH_OFFSET_CFI_RESP + 2, 'R') &&
1897                         flash_isequal(info, 0,
1898                                         FLASH_OFFSET_CFI_RESP + 4, 'Y')) {
1899                         flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
1900                                         sizeof(struct cfi_qry));
1901 #ifdef CONFIG_SYS_FLASH_INTERFACE_WIDTH
1902                         info->interface = CONFIG_SYS_FLASH_INTERFACE_WIDTH;
1903 #else
1904                         info->interface = le16_to_cpu(qry->interface_desc);
1905                         /* Some flash chips can support multiple bus widths.
1906                          * In this case, override the interface width and
1907                          * limit it to the port width.
1908                          */
1909                         if ((info->interface == FLASH_CFI_X8X16) &&
1910                                 (info->portwidth == FLASH_CFI_8BIT)) {
1911                                         debug("Overriding 16-bit interface"
1912                                                 " width to 8-bit port width.\n");
1913                                 info->interface = FLASH_CFI_X8;
1914                         } else if ((info->interface == FLASH_CFI_X16X32) &&
1915                                 (info->portwidth == FLASH_CFI_16BIT)) {
1916                                         debug("Overriding 16-bit interface"
1917                                                 " width to 16-bit port width.\n");
1918                                 info->interface = FLASH_CFI_X16;
1919                         }
1920 #endif
1921                         info->cfi_offset = flash_offset_cfi[cfi_offset];
1922                         debug ("device interface is %d\n",
1923                                info->interface);
1924                         debug ("found port %d chip %d ",
1925                                info->portwidth, info->chipwidth);
1926                         debug ("port %d bits chip %d bits\n",
1927                                info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1928                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1929
1930                         /* calculate command offsets as in the Linux driver */
1931                         info->addr_unlock1 = 0xaaa;
1932                         info->addr_unlock2 = 0x555;
1933
1934                         /*
1935                          * modify the unlock address if we are
1936                          * in compatibility mode
1937                          */
1938                         if (    /* x8/x16 in x8 mode */
1939                                 ((info->chipwidth == FLASH_CFI_BY8) &&
1940                                         (info->interface == FLASH_CFI_X8X16)) ||
1941                                 /* x16/x32 in x16 mode */
1942                                 ((info->chipwidth == FLASH_CFI_BY16) &&
1943                                         (info->interface == FLASH_CFI_X16X32)))
1944                         {
1945                                 info->addr_unlock1 = 0xaaa;
1946                                 info->addr_unlock2 = 0x555;
1947                         }
1948
1949                         info->name = "CFI conformant";
1950                         return 1;
1951                 }
1952         }
1953
1954         return 0;
1955 }
1956
1957 static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1958 {
1959         debug ("flash detect cfi\n");
1960
1961         for (info->portwidth = CONFIG_SYS_FLASH_CFI_WIDTH;
1962              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
1963                 for (info->chipwidth = FLASH_CFI_BY8;
1964                      info->chipwidth <= info->portwidth;
1965                      info->chipwidth <<= 1)
1966                         if (__flash_detect_cfi(info, qry)) {
1967                                 debug("Found CFI flash, portwidth %d,"
1968                                         " chipwidth %d\n",
1969                                         info->portwidth, info->chipwidth);
1970                                 return 1;
1971                         }
1972         }
1973         debug ("not found\n");
1974         return 0;
1975 }
1976
1977 /*
1978  * Manufacturer-specific quirks. Add workarounds for geometry
1979  * reversal, etc. here.
1980  */
1981 static void flash_fixup_amd(flash_info_t *info, struct cfi_qry *qry)
1982 {
1983         /* check if flash geometry needs reversal */
1984         if (qry->num_erase_regions > 1) {
1985                 /* reverse geometry if top boot part */
1986                 if (info->cfi_version < 0x3131) {
1987                         /* CFI < 1.1, try to guess from device id */
1988                         if ((info->device_id & 0x80) != 0)
1989                                 cfi_reverse_geometry(qry);
1990                 } else if (flash_read_uchar(info, info->ext_addr + 0x1e) == 3) {
1991                         /* CFI >= 1.1, deduct from top/bottom flag */
1992                         /* note: ext_addr is valid since cfi_version > 0 */
1993                         cfi_reverse_geometry(qry);
1994                 }
1995         }
1996 }
1997
1998 static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
1999 {
2000         int reverse_geometry = 0;
2001
2002         /* Check the "top boot" bit in the PRI */
2003         if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1))
2004                 reverse_geometry = 1;
2005
2006         /* AT49BV6416(T) list the erase regions in the wrong order.
2007          * However, the device ID is identical with the non-broken
2008          * AT49BV642D they differ in the high byte.
2009          */
2010         if (info->device_id == 0xd6 || info->device_id == 0xd2)
2011                 reverse_geometry = !reverse_geometry;
2012
2013         if (reverse_geometry)
2014                 cfi_reverse_geometry(qry);
2015 }
2016
2017 static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
2018 {
2019         /* check if flash geometry needs reversal */
2020         if (qry->num_erase_regions > 1) {
2021                 /* reverse geometry if top boot part */
2022                 if (info->cfi_version < 0x3131) {
2023                         /* CFI < 1.1, guess by device id */
2024                         if (info->device_id == 0x22CA || /* M29W320DT */
2025                             info->device_id == 0x2256 || /* M29W320ET */
2026                             info->device_id == 0x22D7) { /* M29W800DT */
2027                                 cfi_reverse_geometry(qry);
2028                         }
2029                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
2030                         /* CFI >= 1.1, deduct from top/bottom flag */
2031                         /* note: ext_addr is valid since cfi_version > 0 */
2032                         cfi_reverse_geometry(qry);
2033                 }
2034         }
2035 }
2036
2037 static void flash_fixup_sst(flash_info_t *info, struct cfi_qry *qry)
2038 {
2039         /*
2040          * SST, for many recent nor parallel flashes, says they are
2041          * CFI-conformant. This is not true, since qry struct.
2042          * reports a std. AMD command set (0x0002), while SST allows to
2043          * erase two different sector sizes for the same memory.
2044          * 64KB sector (SST call it block)  needs 0x30 to be erased.
2045          * 4KB  sector (SST call it sector) needs 0x50 to be erased.
2046          * Since CFI query detect the 4KB number of sectors, users expects
2047          * a sector granularity of 4KB, and it is here set.
2048          */
2049         if (info->device_id == 0x5D23 || /* SST39VF3201B */
2050             info->device_id == 0x5C23) { /* SST39VF3202B */
2051                 /* set sector granularity to 4KB */
2052                 info->cmd_erase_sector=0x50;
2053         }
2054 }
2055
2056 /*
2057  * The following code cannot be run from FLASH!
2058  *
2059  */
2060 ulong flash_get_size (phys_addr_t base, int banknum)
2061 {
2062         flash_info_t *info = &flash_info[banknum];
2063         int i, j;
2064         flash_sect_t sect_cnt;
2065         phys_addr_t sector;
2066         unsigned long tmp;
2067         int size_ratio;
2068         uchar num_erase_regions;
2069         int erase_region_size;
2070         int erase_region_count;
2071         struct cfi_qry qry;
2072         unsigned long max_size;
2073
2074         memset(&qry, 0, sizeof(qry));
2075
2076         info->ext_addr = 0;
2077         info->cfi_version = 0;
2078 #ifdef CONFIG_SYS_FLASH_PROTECTION
2079         info->legacy_unlock = 0;
2080 #endif
2081
2082         info->start[0] = (ulong)map_physmem(base, info->portwidth, MAP_NOCACHE);
2083
2084         if (flash_detect_cfi (info, &qry)) {
2085                 info->vendor = le16_to_cpu(qry.p_id);
2086                 info->ext_addr = le16_to_cpu(qry.p_adr) * 2;
2087                 debug("extended address is 0x%x\n", info->ext_addr);
2088                 num_erase_regions = qry.num_erase_regions;
2089
2090                 if (info->ext_addr) {
2091                         info->cfi_version = (ushort) flash_read_uchar (info,
2092                                                 info->ext_addr + 6) << 8;
2093                         info->cfi_version |= (ushort) flash_read_uchar (info,
2094                                                 info->ext_addr + 8);
2095                 }
2096
2097 #ifdef DEBUG
2098                 flash_printqry (&qry);
2099 #endif
2100
2101                 switch (info->vendor) {
2102                 case CFI_CMDSET_INTEL_PROG_REGIONS:
2103                 case CFI_CMDSET_INTEL_STANDARD:
2104                 case CFI_CMDSET_INTEL_EXTENDED:
2105                         cmdset_intel_init(info, &qry);
2106                         break;
2107                 case CFI_CMDSET_AMD_STANDARD:
2108                 case CFI_CMDSET_AMD_EXTENDED:
2109                         cmdset_amd_init(info, &qry);
2110                         break;
2111                 default:
2112                         printf("CFI: Unknown command set 0x%x\n",
2113                                         info->vendor);
2114                         /*
2115                          * Unfortunately, this means we don't know how
2116                          * to get the chip back to Read mode. Might
2117                          * as well try an Intel-style reset...
2118                          */
2119                         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
2120                         return 0;
2121                 }
2122
2123                 /* Do manufacturer-specific fixups */
2124                 switch (info->manufacturer_id) {
2125                 case 0x0001: /* AMD */
2126                 case 0x0037: /* AMIC */
2127                         flash_fixup_amd(info, &qry);
2128                         break;
2129                 case 0x001f:
2130                         flash_fixup_atmel(info, &qry);
2131                         break;
2132                 case 0x0020:
2133                         flash_fixup_stm(info, &qry);
2134                         break;
2135                 case 0x00bf: /* SST */
2136                         flash_fixup_sst(info, &qry);
2137                         break;
2138                 }
2139
2140                 debug ("manufacturer is %d\n", info->vendor);
2141                 debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
2142                 debug ("device id is 0x%x\n", info->device_id);
2143                 debug ("device id2 is 0x%x\n", info->device_id2);
2144                 debug ("cfi version is 0x%04x\n", info->cfi_version);
2145                 debug("port width: %d, chipwidth: %d, interface: %d\n",
2146                         info->portwidth, info->chipwidth, info->interface);
2147
2148                 size_ratio = info->portwidth / info->chipwidth;
2149                 /* if the chip is x8/x16 reduce the ratio by half */
2150                 if ((info->interface == FLASH_CFI_X8X16)
2151                     && (info->chipwidth == FLASH_CFI_BY8)) {
2152                         size_ratio >>= 1;
2153                 }
2154                 debug ("size_ratio %d port %d bits chip %d bits\n",
2155                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
2156                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
2157                 info->size = 1 << qry.dev_size;
2158                 /* multiply the size by the number of chips */
2159                 info->size *= size_ratio;
2160                 max_size = cfi_flash_bank_size(banknum);
2161                 if (max_size && (info->size > max_size)) {
2162                         debug("[truncated from %ldMiB]", info->size >> 20);
2163                         info->size = max_size;
2164                 }
2165                 debug ("found %d erase regions\n", num_erase_regions);
2166                 sect_cnt = 0;
2167                 sector = base;
2168                 for (i = 0; i < num_erase_regions; i++) {
2169                         if (i > NUM_ERASE_REGIONS) {
2170                                 printf ("%d erase regions found, only %d used\n",
2171                                         num_erase_regions, NUM_ERASE_REGIONS);
2172                                 break;
2173                         }
2174
2175                         tmp = le32_to_cpu(qry.erase_region_info[i]);
2176                         debug("erase region %u: 0x%08lx\n", i, tmp);
2177
2178                         erase_region_count = (tmp & 0xffff) + 1;
2179                         tmp >>= 16;
2180                         erase_region_size =
2181                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
2182                         debug ("erase_region_count = %d erase_region_size = %d\n",
2183                                 erase_region_count, erase_region_size);
2184                         for (j = 0; j < erase_region_count; j++) {
2185                                 if (sector - base >= info->size)
2186                                         break;
2187                                 if (sect_cnt >= CONFIG_SYS_MAX_FLASH_SECT) {
2188                                         printf("ERROR: too many flash sectors\n");
2189                                         break;
2190                                 }
2191                                 info->start[sect_cnt] =
2192                                         (ulong)map_physmem(sector,
2193                                                            info->portwidth,
2194                                                            MAP_NOCACHE);
2195                                 sector += (erase_region_size * size_ratio);
2196
2197                                 /*
2198                                  * Only read protection status from
2199                                  * supported devices (intel...)
2200                                  */
2201                                 switch (info->vendor) {
2202                                 case CFI_CMDSET_INTEL_PROG_REGIONS:
2203                                 case CFI_CMDSET_INTEL_EXTENDED:
2204                                 case CFI_CMDSET_INTEL_STANDARD:
2205                                         /*
2206                                          * Set flash to read-id mode. Otherwise
2207                                          * reading protected status is not
2208                                          * guaranteed.
2209                                          */
2210                                         flash_write_cmd(info, sect_cnt, 0,
2211                                                         FLASH_CMD_READ_ID);
2212                                         info->protect[sect_cnt] =
2213                                                 flash_isset (info, sect_cnt,
2214                                                              FLASH_OFFSET_PROTECT,
2215                                                              FLASH_STATUS_PROTECT);
2216                                         break;
2217                                 case CFI_CMDSET_AMD_EXTENDED:
2218                                 case CFI_CMDSET_AMD_STANDARD:
2219                                         if (!info->legacy_unlock) {
2220                                                 /* default: not protected */
2221                                                 info->protect[sect_cnt] = 0;
2222                                                 break;
2223                                         }
2224
2225                                         /* Read protection (PPB) from sector */
2226                                         flash_write_cmd(info, 0, 0,
2227                                                         info->cmd_reset);
2228                                         flash_unlock_seq(info, 0);
2229                                         flash_write_cmd(info, 0,
2230                                                         info->addr_unlock1,
2231                                                         FLASH_CMD_READ_ID);
2232                                         info->protect[sect_cnt] =
2233                                                 flash_isset(
2234                                                         info, sect_cnt,
2235                                                         FLASH_OFFSET_PROTECT,
2236                                                         FLASH_STATUS_PROTECT);
2237                                         break;
2238                                 default:
2239                                         /* default: not protected */
2240                                         info->protect[sect_cnt] = 0;
2241                                 }
2242
2243                                 sect_cnt++;
2244                         }
2245                 }
2246
2247                 info->sector_count = sect_cnt;
2248                 info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
2249                 tmp = 1 << qry.block_erase_timeout_typ;
2250                 info->erase_blk_tout = tmp *
2251                         (1 << qry.block_erase_timeout_max);
2252                 tmp = (1 << qry.buf_write_timeout_typ) *
2253                         (1 << qry.buf_write_timeout_max);
2254
2255                 /* round up when converting to ms */
2256                 info->buffer_write_tout = (tmp + 999) / 1000;
2257                 tmp = (1 << qry.word_write_timeout_typ) *
2258                         (1 << qry.word_write_timeout_max);
2259                 /* round up when converting to ms */
2260                 info->write_tout = (tmp + 999) / 1000;
2261                 info->flash_id = FLASH_MAN_CFI;
2262                 if ((info->interface == FLASH_CFI_X8X16) &&
2263                     (info->chipwidth == FLASH_CFI_BY8)) {
2264                         /* XXX - Need to test on x8/x16 in parallel. */
2265                         info->portwidth >>= 1;
2266                 }
2267
2268                 flash_write_cmd (info, 0, 0, info->cmd_reset);
2269         }
2270
2271         return (info->size);
2272 }
2273
2274 #ifdef CONFIG_FLASH_CFI_MTD
2275 void flash_set_verbose(uint v)
2276 {
2277         flash_verbose = v;
2278 }
2279 #endif
2280
2281 static void cfi_flash_set_config_reg(u32 base, u16 val)
2282 {
2283 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
2284         /*
2285          * Only set this config register if really defined
2286          * to a valid value (0xffff is invalid)
2287          */
2288         if (val == 0xffff)
2289                 return;
2290
2291         /*
2292          * Set configuration register. Data is "encrypted" in the 16 lower
2293          * address bits.
2294          */
2295         flash_write16(FLASH_CMD_SETUP, (void *)(base + (val << 1)));
2296         flash_write16(FLASH_CMD_SET_CR_CONFIRM, (void *)(base + (val << 1)));
2297
2298         /*
2299          * Finally issue reset-command to bring device back to
2300          * read-array mode
2301          */
2302         flash_write16(FLASH_CMD_RESET, (void *)base);
2303 #endif
2304 }
2305
2306 /*-----------------------------------------------------------------------
2307  */
2308
2309 void flash_protect_default(void)
2310 {
2311 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2312         int i;
2313         struct apl_s {
2314                 ulong start;
2315                 ulong size;
2316         } apl[] = CONFIG_SYS_FLASH_AUTOPROTECT_LIST;
2317 #endif
2318
2319         /* Monitor protection ON by default */
2320 #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) && \
2321         (!defined(CONFIG_MONITOR_IS_IN_RAM))
2322         flash_protect(FLAG_PROTECT_SET,
2323                        CONFIG_SYS_MONITOR_BASE,
2324                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len  - 1,
2325                        flash_get_info(CONFIG_SYS_MONITOR_BASE));
2326 #endif
2327
2328         /* Environment protection ON by default */
2329 #ifdef CONFIG_ENV_IS_IN_FLASH
2330         flash_protect(FLAG_PROTECT_SET,
2331                        CONFIG_ENV_ADDR,
2332                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
2333                        flash_get_info(CONFIG_ENV_ADDR));
2334 #endif
2335
2336         /* Redundant environment protection ON by default */
2337 #ifdef CONFIG_ENV_ADDR_REDUND
2338         flash_protect(FLAG_PROTECT_SET,
2339                        CONFIG_ENV_ADDR_REDUND,
2340                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
2341                        flash_get_info(CONFIG_ENV_ADDR_REDUND));
2342 #endif
2343
2344 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2345         for (i = 0; i < (sizeof(apl) / sizeof(struct apl_s)); i++) {
2346                 debug("autoprotecting from %08lx to %08lx\n",
2347                       apl[i].start, apl[i].start + apl[i].size - 1);
2348                 flash_protect(FLAG_PROTECT_SET,
2349                                apl[i].start,
2350                                apl[i].start + apl[i].size - 1,
2351                                flash_get_info(apl[i].start));
2352         }
2353 #endif
2354 }
2355
2356 unsigned long flash_init (void)
2357 {
2358         unsigned long size = 0;
2359         int i;
2360
2361 #ifdef CONFIG_SYS_FLASH_PROTECTION
2362         /* read environment from EEPROM */
2363         char s[64];
2364         getenv_f("unlock", s, sizeof(s));
2365 #endif
2366
2367         /* Init: no FLASHes known */
2368         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
2369                 flash_info[i].flash_id = FLASH_UNKNOWN;
2370
2371                 /* Optionally write flash configuration register */
2372                 cfi_flash_set_config_reg(cfi_flash_bank_addr(i),
2373                                          cfi_flash_config_reg(i));
2374
2375                 if (!flash_detect_legacy(cfi_flash_bank_addr(i), i))
2376                         flash_get_size(cfi_flash_bank_addr(i), i);
2377                 size += flash_info[i].size;
2378                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
2379 #ifndef CONFIG_SYS_FLASH_QUIET_TEST
2380                         printf ("## Unknown flash on Bank %d "
2381                                 "- Size = 0x%08lx = %ld MB\n",
2382                                 i+1, flash_info[i].size,
2383                                 flash_info[i].size >> 20);
2384 #endif /* CONFIG_SYS_FLASH_QUIET_TEST */
2385                 }
2386 #ifdef CONFIG_SYS_FLASH_PROTECTION
2387                 else if ((s != NULL) && (strcmp(s, "yes") == 0)) {
2388                         /*
2389                          * Only the U-Boot image and it's environment
2390                          * is protected, all other sectors are
2391                          * unprotected (unlocked) if flash hardware
2392                          * protection is used (CONFIG_SYS_FLASH_PROTECTION)
2393                          * and the environment variable "unlock" is
2394                          * set to "yes".
2395                          */
2396                         if (flash_info[i].legacy_unlock) {
2397                                 int k;
2398
2399                                 /*
2400                                  * Disable legacy_unlock temporarily,
2401                                  * since flash_real_protect would
2402                                  * relock all other sectors again
2403                                  * otherwise.
2404                                  */
2405                                 flash_info[i].legacy_unlock = 0;
2406
2407                                 /*
2408                                  * Legacy unlocking (e.g. Intel J3) ->
2409                                  * unlock only one sector. This will
2410                                  * unlock all sectors.
2411                                  */
2412                                 flash_real_protect (&flash_info[i], 0, 0);
2413
2414                                 flash_info[i].legacy_unlock = 1;
2415
2416                                 /*
2417                                  * Manually mark other sectors as
2418                                  * unlocked (unprotected)
2419                                  */
2420                                 for (k = 1; k < flash_info[i].sector_count; k++)
2421                                         flash_info[i].protect[k] = 0;
2422                         } else {
2423                                 /*
2424                                  * No legancy unlocking -> unlock all sectors
2425                                  */
2426                                 flash_protect (FLAG_PROTECT_CLEAR,
2427                                                flash_info[i].start[0],
2428                                                flash_info[i].start[0]
2429                                                + flash_info[i].size - 1,
2430                                                &flash_info[i]);
2431                         }
2432                 }
2433 #endif /* CONFIG_SYS_FLASH_PROTECTION */
2434         }
2435
2436         flash_protect_default();
2437 #ifdef CONFIG_FLASH_CFI_MTD
2438         cfi_mtd_init();
2439 #endif
2440
2441         return (size);
2442 }