drivers/mtd/cfi_flash.c

   1 /*
   2  * (C) Copyright 2002-2004
   3  * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
   4  *
   5  * Copyright (C) 2003 Arabella Software Ltd.
   6  * Yuli Barcohen <yuli@arabellasw.com>
   7  *
   8  * Copyright (C) 2004
   9  * Ed Okerson
  10  *
  11  * Copyright (C) 2006
  12  * Tolunay Orkun <listmember@orkun.us>
  13  *
  14  * See file CREDITS for list of people who contributed to this
  15  * project.
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License as
  19  * published by the Free Software Foundation; either version 2 of
  20  * the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  30  * MA 02111-1307 USA
  31  *
  32  */
  33
  34 /* The DEBUG define must be before common to enable debugging */
  35 /* #define DEBUG        */
  36
  37 #include <common.h>
  38 #include <asm/processor.h>
  39 #include <asm/io.h>
  40 #include <asm/byteorder.h>
  41 #include <environment.h>
  42 #include <mtd/cfi_flash.h>
  43
  44 /*
  45  * This file implements a Common Flash Interface (CFI) driver for
  46  * U-Boot.
  47  *
  48  * The width of the port and the width of the chips are determined at
  49  * initialization.  These widths are used to calculate the address for
  50  * access CFI data structures.
  51  *
  52  * References
  53  * JEDEC Standard JESD68 - Common Flash Interface (CFI)
  54  * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
  55  * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
  56  * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
  57  * AMD CFI Specification, Release 2.0 December 1, 2001
  58  * AMD/Spansion Application Note: Migration from Single-byte to Three-byte
  59  *   Device IDs, Publication Number 25538 Revision A, November 8, 2001
  60  *
  61  * Define CONFIG_SYS_WRITE_SWAPPED_DATA, if you have to swap the Bytes between
  62  * reading and writing ... (yes there is such a Hardware).
  63  */
  64
  65 static uint flash_offset_cfi[2] = { FLASH_OFFSET_CFI, FLASH_OFFSET_CFI_ALT };
  66 #ifdef CONFIG_FLASH_CFI_MTD
  67 static uint flash_verbose = 1;
  68 #else
  69 #define flash_verbose 1
  70 #endif
  71
  72 flash_info_t flash_info[CFI_MAX_FLASH_BANKS];   /* FLASH chips info */
  73
  74 /*
  75  * Check if chip width is defined. If not, start detecting with 8bit.
  76  */
  77 #ifndef CONFIG_SYS_FLASH_CFI_WIDTH
  78 #define CONFIG_SYS_FLASH_CFI_WIDTH      FLASH_CFI_8BIT
  79 #endif
  80
  81 /*
  82  * 0xffff is an undefined value for the configuration register. When
  83  * this value is returned, the configuration register shall not be
  84  * written at all (default mode).
  85  */
  86 static u16 cfi_flash_config_reg(int i)
  87 {
  88 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
  89         return ((u16 [])CONFIG_SYS_CFI_FLASH_CONFIG_REGS)[i];
  90 #else
  91         return 0xffff;
  92 #endif
  93 }
  94
  95 #if defined(CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
  96 int cfi_flash_num_flash_banks = CONFIG_SYS_MAX_FLASH_BANKS_DETECT;
  97 #endif
  98
  99 static phys_addr_t __cfi_flash_bank_addr(int i)
 100 {
 101         return ((phys_addr_t [])CONFIG_SYS_FLASH_BANKS_LIST)[i];
 102 }
 103 phys_addr_t cfi_flash_bank_addr(int i)
 104         __attribute__((weak, alias("__cfi_flash_bank_addr")));
 105
 106 static unsigned long __cfi_flash_bank_size(int i)
 107 {
 108 #ifdef CONFIG_SYS_FLASH_BANKS_SIZES
 109         return ((unsigned long [])CONFIG_SYS_FLASH_BANKS_SIZES)[i];
 110 #else
 111         return 0;
 112 #endif
 113 }
 114 unsigned long cfi_flash_bank_size(int i)
 115         __attribute__((weak, alias("__cfi_flash_bank_size")));
 116
 117 static void __flash_write8(u8 value, void *addr)
 118 {
 119         __raw_writeb(value, addr);
 120 }
 121
 122 static void __flash_write16(u16 value, void *addr)
 123 {
 124         __raw_writew(value, addr);
 125 }
 126
 127 static void __flash_write32(u32 value, void *addr)
 128 {
 129         __raw_writel(value, addr);
 130 }
 131
 132 static void __flash_write64(u64 value, void *addr)
 133 {
 134         /* No architectures currently implement __raw_writeq() */
 135         *(volatile u64 *)addr = value;
 136 }
 137
 138 static u8 __flash_read8(void *addr)
 139 {
 140         return __raw_readb(addr);
 141 }
 142
 143 static u16 __flash_read16(void *addr)
 144 {
 145         return __raw_readw(addr);
 146 }
 147
 148 static u32 __flash_read32(void *addr)
 149 {
 150         return __raw_readl(addr);
 151 }
 152
 153 static u64 __flash_read64(void *addr)
 154 {
 155         /* No architectures currently implement __raw_readq() */
 156         return *(volatile u64 *)addr;
 157 }
 158
 159 #ifdef CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS
 160 void flash_write8(u8 value, void *addr)__attribute__((weak, alias("__flash_write8")));
 161 void flash_write16(u16 value, void *addr)__attribute__((weak, alias("__flash_write16")));
 162 void flash_write32(u32 value, void *addr)__attribute__((weak, alias("__flash_write32")));
 163 void flash_write64(u64 value, void *addr)__attribute__((weak, alias("__flash_write64")));
 164 u8 flash_read8(void *addr)__attribute__((weak, alias("__flash_read8")));
 165 u16 flash_read16(void *addr)__attribute__((weak, alias("__flash_read16")));
 166 u32 flash_read32(void *addr)__attribute__((weak, alias("__flash_read32")));
 167 u64 flash_read64(void *addr)__attribute__((weak, alias("__flash_read64")));
 168 #else
 169 #define flash_write8    __flash_write8
 170 #define flash_write16   __flash_write16
 171 #define flash_write32   __flash_write32
 172 #define flash_write64   __flash_write64
 173 #define flash_read8     __flash_read8
 174 #define flash_read16    __flash_read16
 175 #define flash_read32    __flash_read32
 176 #define flash_read64    __flash_read64
 177 #endif
 178
 179 /*-----------------------------------------------------------------------
 180  */
 181 #if defined(CONFIG_ENV_IS_IN_FLASH) || defined(CONFIG_ENV_ADDR_REDUND) || (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
 182 flash_info_t *flash_get_info(ulong base)
 183 {
 184         int i;
 185         flash_info_t *info = NULL;
 186
 187         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 188                 info = & flash_info[i];
 189                 if (info->size && info->start[0] <= base &&
 190                     base <= info->start[0] + info->size - 1)
 191                         break;
 192         }
 193
 194         return info;
 195 }
 196 #endif
 197
 198 unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect)
 199 {
 200         if (sect != (info->sector_count - 1))
 201                 return info->start[sect + 1] - info->start[sect];
 202         else
 203                 return info->start[0] + info->size - info->start[sect];
 204 }
 205
 206 /*-----------------------------------------------------------------------
 207  * create an address based on the offset and the port width
 208  */
 209 static inline void *
 210 flash_map (flash_info_t * info, flash_sect_t sect, uint offset)
 211 {
 212         unsigned int byte_offset = offset * info->portwidth;
 213
 214         return (void *)(info->start[sect] + byte_offset);
 215 }
 216
 217 static inline void flash_unmap(flash_info_t *info, flash_sect_t sect,
 218                 unsigned int offset, void *addr)
 219 {
 220 }
 221
 222 /*-----------------------------------------------------------------------
 223  * make a proper sized command based on the port and chip widths
 224  */
 225 static void flash_make_cmd(flash_info_t *info, u32 cmd, void *cmdbuf)
 226 {
 227         int i;
 228         int cword_offset;
 229         int cp_offset;
 230 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 231         u32 cmd_le = cpu_to_le32(cmd);
 232 #endif
 233         uchar val;
 234         uchar *cp = (uchar *) cmdbuf;
 235
 236         for (i = info->portwidth; i > 0; i--){
 237                 cword_offset = (info->portwidth-i)%info->chipwidth;
 238 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 239                 cp_offset = info->portwidth - i;
 240                 val = *((uchar*)&cmd_le + cword_offset);
 241 #else
 242                 cp_offset = i - 1;
 243                 val = *((uchar*)&cmd + sizeof(u32) - cword_offset - 1);
 244 #endif
 245                 cp[cp_offset] = (cword_offset >= sizeof(u32)) ? 0x00 : val;
 246         }
 247 }
 248
 249 #ifdef DEBUG
 250 /*-----------------------------------------------------------------------
 251  * Debug support
 252  */
 253 static void print_longlong (char *str, unsigned long long data)
 254 {
 255         int i;
 256         char *cp;
 257
 258         cp = (char *) &data;
 259         for (i = 0; i < 8; i++)
 260                 sprintf (&str[i * 2], "%2.2x", *cp++);
 261 }
 262
 263 static void flash_printqry (struct cfi_qry *qry)
 264 {
 265         u8 *p = (u8 *)qry;
 266         int x, y;
 267
 268         for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
 269                 debug("%02x : ", x);
 270                 for (y = 0; y < 16; y++)
 271                         debug("%2.2x ", p[x + y]);
 272                 debug(" ");
 273                 for (y = 0; y < 16; y++) {
 274                         unsigned char c = p[x + y];
 275                         if (c >= 0x20 && c <= 0x7e)
 276                                 debug("%c", c);
 277                         else
 278                                 debug(".");
 279                 }
 280                 debug("\n");
 281         }
 282 }
 283 #endif
 284
 285
 286 /*-----------------------------------------------------------------------
 287  * read a character at a port width address
 288  */
 289 static inline uchar flash_read_uchar (flash_info_t * info, uint offset)
 290 {
 291         uchar *cp;
 292         uchar retval;
 293
 294         cp = flash_map (info, 0, offset);
 295 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 296         retval = flash_read8(cp);
 297 #else
 298         retval = flash_read8(cp + info->portwidth - 1);
 299 #endif
 300         flash_unmap (info, 0, offset, cp);
 301         return retval;
 302 }
 303
 304 /*-----------------------------------------------------------------------
 305  * read a word at a port width address, assume 16bit bus
 306  */
 307 static inline ushort flash_read_word (flash_info_t * info, uint offset)
 308 {
 309         ushort *addr, retval;
 310
 311         addr = flash_map (info, 0, offset);
 312         retval = flash_read16 (addr);
 313         flash_unmap (info, 0, offset, addr);
 314         return retval;
 315 }
 316
 317
 318 /*-----------------------------------------------------------------------
 319  * read a long word by picking the least significant byte of each maximum
 320  * port size word. Swap for ppc format.
 321  */
 322 static ulong flash_read_long (flash_info_t * info, flash_sect_t sect,
 323                               uint offset)
 324 {
 325         uchar *addr;
 326         ulong retval;
 327
 328 #ifdef DEBUG
 329         int x;
 330 #endif
 331         addr = flash_map (info, sect, offset);
 332
 333 #ifdef DEBUG
 334         debug ("long addr is at %p info->portwidth = %d\n", addr,
 335                info->portwidth);
 336         for (x = 0; x < 4 * info->portwidth; x++) {
 337                 debug ("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
 338         }
 339 #endif
 340 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 341         retval = ((flash_read8(addr) << 16) |
 342                   (flash_read8(addr + info->portwidth) << 24) |
 343                   (flash_read8(addr + 2 * info->portwidth)) |
 344                   (flash_read8(addr + 3 * info->portwidth) << 8));
 345 #else
 346         retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) |
 347                   (flash_read8(addr + info->portwidth - 1) << 16) |
 348                   (flash_read8(addr + 4 * info->portwidth - 1) << 8) |
 349                   (flash_read8(addr + 3 * info->portwidth - 1)));
 350 #endif
 351         flash_unmap(info, sect, offset, addr);
 352
 353         return retval;
 354 }
 355
 356 /*
 357  * Write a proper sized command to the correct address
 358  */
 359 void flash_write_cmd (flash_info_t * info, flash_sect_t sect,
 360                       uint offset, u32 cmd)
 361 {
 362
 363         void *addr;
 364         cfiword_t cword;
 365
 366         addr = flash_map (info, sect, offset);
 367         flash_make_cmd (info, cmd, &cword);
 368         switch (info->portwidth) {
 369         case FLASH_CFI_8BIT:
 370                 debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr, cmd,
 371                        cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 372                 flash_write8(cword.c, addr);
 373                 break;
 374         case FLASH_CFI_16BIT:
 375                 debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr,
 376                        cmd, cword.w,
 377                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 378                 flash_write16(cword.w, addr);
 379                 break;
 380         case FLASH_CFI_32BIT:
 381                 debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr,
 382                        cmd, cword.l,
 383                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 384                 flash_write32(cword.l, addr);
 385                 break;
 386         case FLASH_CFI_64BIT:
 387 #ifdef DEBUG
 388                 {
 389                         char str[20];
 390
 391                         print_longlong (str, cword.ll);
 392
 393                         debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
 394                                addr, cmd, str,
 395                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 396                 }
 397 #endif
 398                 flash_write64(cword.ll, addr);
 399                 break;
 400         }
 401
 402         /* Ensure all the instructions are fully finished */
 403         sync();
 404
 405         flash_unmap(info, sect, offset, addr);
 406 }
 407
 408 static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
 409 {
 410         flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_UNLOCK_START);
 411         flash_write_cmd (info, sect, info->addr_unlock2, AMD_CMD_UNLOCK_ACK);
 412 }
 413
 414 /*-----------------------------------------------------------------------
 415  */
 416 static int flash_isequal (flash_info_t * info, flash_sect_t sect,
 417                           uint offset, uchar cmd)
 418 {
 419         void *addr;
 420         cfiword_t cword;
 421         int retval;
 422
 423         addr = flash_map (info, sect, offset);
 424         flash_make_cmd (info, cmd, &cword);
 425
 426         debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
 427         switch (info->portwidth) {
 428         case FLASH_CFI_8BIT:
 429                 debug ("is= %x %x\n", flash_read8(addr), cword.c);
 430                 retval = (flash_read8(addr) == cword.c);
 431                 break;
 432         case FLASH_CFI_16BIT:
 433                 debug ("is= %4.4x %4.4x\n", flash_read16(addr), cword.w);
 434                 retval = (flash_read16(addr) == cword.w);
 435                 break;
 436         case FLASH_CFI_32BIT:
 437                 debug ("is= %8.8x %8.8lx\n", flash_read32(addr), cword.l);
 438                 retval = (flash_read32(addr) == cword.l);
 439                 break;
 440         case FLASH_CFI_64BIT:
 441 #ifdef DEBUG
 442                 {
 443                         char str1[20];
 444                         char str2[20];
 445
 446                         print_longlong (str1, flash_read64(addr));
 447                         print_longlong (str2, cword.ll);
 448                         debug ("is= %s %s\n", str1, str2);
 449                 }
 450 #endif
 451                 retval = (flash_read64(addr) == cword.ll);
 452                 break;
 453         default:
 454                 retval = 0;
 455                 break;
 456         }
 457         flash_unmap(info, sect, offset, addr);
 458
 459         return retval;
 460 }
 461
 462 /*-----------------------------------------------------------------------
 463  */
 464 static int flash_isset (flash_info_t * info, flash_sect_t sect,
 465                         uint offset, uchar cmd)
 466 {
 467         void *addr;
 468         cfiword_t cword;
 469         int retval;
 470
 471         addr = flash_map (info, sect, offset);
 472         flash_make_cmd (info, cmd, &cword);
 473         switch (info->portwidth) {
 474         case FLASH_CFI_8BIT:
 475                 retval = ((flash_read8(addr) & cword.c) == cword.c);
 476                 break;
 477         case FLASH_CFI_16BIT:
 478                 retval = ((flash_read16(addr) & cword.w) == cword.w);
 479                 break;
 480         case FLASH_CFI_32BIT:
 481                 retval = ((flash_read32(addr) & cword.l) == cword.l);
 482                 break;
 483         case FLASH_CFI_64BIT:
 484                 retval = ((flash_read64(addr) & cword.ll) == cword.ll);
 485                 break;
 486         default:
 487                 retval = 0;
 488                 break;
 489         }
 490         flash_unmap(info, sect, offset, addr);
 491
 492         return retval;
 493 }
 494
 495 /*-----------------------------------------------------------------------
 496  */
 497 static int flash_toggle (flash_info_t * info, flash_sect_t sect,
 498                          uint offset, uchar cmd)
 499 {
 500         void *addr;
 501         cfiword_t cword;
 502         int retval;
 503
 504         addr = flash_map (info, sect, offset);
 505         flash_make_cmd (info, cmd, &cword);
 506         switch (info->portwidth) {
 507         case FLASH_CFI_8BIT:
 508                 retval = flash_read8(addr) != flash_read8(addr);
 509                 break;
 510         case FLASH_CFI_16BIT:
 511                 retval = flash_read16(addr) != flash_read16(addr);
 512                 break;
 513         case FLASH_CFI_32BIT:
 514                 retval = flash_read32(addr) != flash_read32(addr);
 515                 break;
 516         case FLASH_CFI_64BIT:
 517                 retval = ( (flash_read32( addr ) != flash_read32( addr )) ||
 518                            (flash_read32(addr+4) != flash_read32(addr+4)) );
 519                 break;
 520         default:
 521                 retval = 0;
 522                 break;
 523         }
 524         flash_unmap(info, sect, offset, addr);
 525
 526         return retval;
 527 }
 528
 529 /*
 530  * flash_is_busy - check to see if the flash is busy
 531  *
 532  * This routine checks the status of the chip and returns true if the
 533  * chip is busy.
 534  */
 535 static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
 536 {
 537         int retval;
 538
 539         switch (info->vendor) {
 540         case CFI_CMDSET_INTEL_PROG_REGIONS:
 541         case CFI_CMDSET_INTEL_STANDARD:
 542         case CFI_CMDSET_INTEL_EXTENDED:
 543                 retval = !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
 544                 break;
 545         case CFI_CMDSET_AMD_STANDARD:
 546         case CFI_CMDSET_AMD_EXTENDED:
 547 #ifdef CONFIG_FLASH_CFI_LEGACY
 548         case CFI_CMDSET_AMD_LEGACY:
 549 #endif
 550                 retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
 551                 break;
 552         default:
 553                 retval = 0;
 554         }
 555         debug ("flash_is_busy: %d\n", retval);
 556         return retval;
 557 }
 558
 559 /*-----------------------------------------------------------------------
 560  *  wait for XSR.7 to be set. Time out with an error if it does not.
 561  *  This routine does not set the flash to read-array mode.
 562  */
 563 static int flash_status_check (flash_info_t * info, flash_sect_t sector,
 564                                ulong tout, char *prompt)
 565 {
 566         ulong start;
 567
 568 #if CONFIG_SYS_HZ != 1000
 569         if ((ulong)CONFIG_SYS_HZ > 100000)
 570                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 571         else
 572                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 573 #endif
 574
 575         /* Wait for command completion */
 576 #ifdef CONFIG_SYS_LOW_RES_TIMER
 577         reset_timer();
 578 #endif
 579         start = get_timer (0);
 580         while (flash_is_busy (info, sector)) {
 581                 if (get_timer (start) > tout) {
 582                         printf ("Flash %s timeout at address %lx data %lx\n",
 583                                 prompt, info->start[sector],
 584                                 flash_read_long (info, sector, 0));
 585                         flash_write_cmd (info, sector, 0, info->cmd_reset);
 586                         udelay(1);
 587                         return ERR_TIMOUT;
 588                 }
 589                 udelay (1);             /* also triggers watchdog */
 590         }
 591         return ERR_OK;
 592 }
 593
 594 /*-----------------------------------------------------------------------
 595  * Wait for XSR.7 to be set, if it times out print an error, otherwise
 596  * do a full status check.
 597  *
 598  * This routine sets the flash to read-array mode.
 599  */
 600 static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
 601                                     ulong tout, char *prompt)
 602 {
 603         int retcode;
 604
 605         retcode = flash_status_check (info, sector, tout, prompt);
 606         switch (info->vendor) {
 607         case CFI_CMDSET_INTEL_PROG_REGIONS:
 608         case CFI_CMDSET_INTEL_EXTENDED:
 609         case CFI_CMDSET_INTEL_STANDARD:
 610                 if ((retcode != ERR_OK)
 611                     && !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
 612                         retcode = ERR_INVAL;
 613                         printf ("Flash %s error at address %lx\n", prompt,
 614                                 info->start[sector]);
 615                         if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS |
 616                                          FLASH_STATUS_PSLBS)) {
 617                                 puts ("Command Sequence Error.\n");
 618                         } else if (flash_isset (info, sector, 0,
 619                                                 FLASH_STATUS_ECLBS)) {
 620                                 puts ("Block Erase Error.\n");
 621                                 retcode = ERR_NOT_ERASED;
 622                         } else if (flash_isset (info, sector, 0,
 623                                                 FLASH_STATUS_PSLBS)) {
 624                                 puts ("Locking Error\n");
 625                         }
 626                         if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
 627                                 puts ("Block locked.\n");
 628                                 retcode = ERR_PROTECTED;
 629                         }
 630                         if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
 631                                 puts ("Vpp Low Error.\n");
 632                 }
 633                 flash_write_cmd (info, sector, 0, info->cmd_reset);
 634                 udelay(1);
 635                 break;
 636         default:
 637                 break;
 638         }
 639         return retcode;
 640 }
 641
 642 static int use_flash_status_poll(flash_info_t *info)
 643 {
 644 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 645         if (info->vendor == CFI_CMDSET_AMD_EXTENDED ||
 646             info->vendor == CFI_CMDSET_AMD_STANDARD)
 647                 return 1;
 648 #endif
 649         return 0;
 650 }
 651
 652 static int flash_status_poll(flash_info_t *info, void *src, void *dst,
 653                              ulong tout, char *prompt)
 654 {
 655 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 656         ulong start;
 657         int ready;
 658
 659 #if CONFIG_SYS_HZ != 1000
 660         if ((ulong)CONFIG_SYS_HZ > 100000)
 661                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 662         else
 663                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 664 #endif
 665
 666         /* Wait for command completion */
 667 #ifdef CONFIG_SYS_LOW_RES_TIMER
 668         reset_timer();
 669 #endif
 670         start = get_timer(0);
 671         while (1) {
 672                 switch (info->portwidth) {
 673                 case FLASH_CFI_8BIT:
 674                         ready = flash_read8(dst) == flash_read8(src);
 675                         break;
 676                 case FLASH_CFI_16BIT:
 677                         ready = flash_read16(dst) == flash_read16(src);
 678                         break;
 679                 case FLASH_CFI_32BIT:
 680                         ready = flash_read32(dst) == flash_read32(src);
 681                         break;
 682                 case FLASH_CFI_64BIT:
 683                         ready = flash_read64(dst) == flash_read64(src);
 684                         break;
 685                 default:
 686                         ready = 0;
 687                         break;
 688                 }
 689                 if (ready)
 690                         break;
 691                 if (get_timer(start) > tout) {
 692                         printf("Flash %s timeout at address %lx data %lx\n",
 693                                prompt, (ulong)dst, (ulong)flash_read8(dst));
 694                         return ERR_TIMOUT;
 695                 }
 696                 udelay(1);              /* also triggers watchdog */
 697         }
 698 #endif /* CONFIG_SYS_CFI_FLASH_STATUS_POLL */
 699         return ERR_OK;
 700 }
 701
 702 /*-----------------------------------------------------------------------
 703  */
 704 static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
 705 {
 706 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 707         unsigned short  w;
 708         unsigned int    l;
 709         unsigned long long ll;
 710 #endif
 711
 712         switch (info->portwidth) {
 713         case FLASH_CFI_8BIT:
 714                 cword->c = c;
 715                 break;
 716         case FLASH_CFI_16BIT:
 717 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 718                 w = c;
 719                 w <<= 8;
 720                 cword->w = (cword->w >> 8) | w;
 721 #else
 722                 cword->w = (cword->w << 8) | c;
 723 #endif
 724                 break;
 725         case FLASH_CFI_32BIT:
 726 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 727                 l = c;
 728                 l <<= 24;
 729                 cword->l = (cword->l >> 8) | l;
 730 #else
 731                 cword->l = (cword->l << 8) | c;
 732 #endif
 733                 break;
 734         case FLASH_CFI_64BIT:
 735 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 736                 ll = c;
 737                 ll <<= 56;
 738                 cword->ll = (cword->ll >> 8) | ll;
 739 #else
 740                 cword->ll = (cword->ll << 8) | c;
 741 #endif
 742                 break;
 743         }
 744 }
 745
 746 /*
 747  * Loop through the sector table starting from the previously found sector.
 748  * Searches forwards or backwards, dependent on the passed address.
 749  */
 750 static flash_sect_t find_sector (flash_info_t * info, ulong addr)
 751 {
 752         static flash_sect_t saved_sector = 0; /* previously found sector */
 753         static flash_info_t *saved_info = 0; /* previously used flash bank */
 754         flash_sect_t sector = saved_sector;
 755
 756         if ((info != saved_info) || (sector >= info->sector_count))
 757                 sector = 0;
 758
 759         while ((info->start[sector] < addr)
 760                         && (sector < info->sector_count - 1))
 761                 sector++;
 762         while ((info->start[sector] > addr) && (sector > 0))
 763                 /*
 764                  * also decrements the sector in case of an overshot
 765                  * in the first loop
 766                  */
 767                 sector--;
 768
 769         saved_sector = sector;
 770         saved_info = info;
 771         return sector;
 772 }
 773
 774 /*-----------------------------------------------------------------------
 775  */
 776 static int flash_write_cfiword (flash_info_t * info, ulong dest,
 777                                 cfiword_t cword)
 778 {
 779         void *dstaddr = (void *)dest;
 780         int flag;
 781         flash_sect_t sect = 0;
 782         char sect_found = 0;
 783
 784         /* Check if Flash is (sufficiently) erased */
 785         switch (info->portwidth) {
 786         case FLASH_CFI_8BIT:
 787                 flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
 788                 break;
 789         case FLASH_CFI_16BIT:
 790                 flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
 791                 break;
 792         case FLASH_CFI_32BIT:
 793                 flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
 794                 break;
 795         case FLASH_CFI_64BIT:
 796                 flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
 797                 break;
 798         default:
 799                 flag = 0;
 800                 break;
 801         }
 802         if (!flag)
 803                 return ERR_NOT_ERASED;
 804
 805         /* Disable interrupts which might cause a timeout here */
 806         flag = disable_interrupts ();
 807
 808         switch (info->vendor) {
 809         case CFI_CMDSET_INTEL_PROG_REGIONS:
 810         case CFI_CMDSET_INTEL_EXTENDED:
 811         case CFI_CMDSET_INTEL_STANDARD:
 812                 flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
 813                 flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
 814                 break;
 815         case CFI_CMDSET_AMD_EXTENDED:
 816         case CFI_CMDSET_AMD_STANDARD:
 817                 sect = find_sector(info, dest);
 818                 flash_unlock_seq (info, sect);
 819                 flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE);
 820                 sect_found = 1;
 821                 break;
 822 #ifdef CONFIG_FLASH_CFI_LEGACY
 823         case CFI_CMDSET_AMD_LEGACY:
 824                 sect = find_sector(info, dest);
 825                 flash_unlock_seq (info, 0);
 826                 flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_WRITE);
 827                 sect_found = 1;
 828                 break;
 829 #endif
 830         }
 831
 832         switch (info->portwidth) {
 833         case FLASH_CFI_8BIT:
 834                 flash_write8(cword.c, dstaddr);
 835                 break;
 836         case FLASH_CFI_16BIT:
 837                 flash_write16(cword.w, dstaddr);
 838                 break;
 839         case FLASH_CFI_32BIT:
 840                 flash_write32(cword.l, dstaddr);
 841                 break;
 842         case FLASH_CFI_64BIT:
 843                 flash_write64(cword.ll, dstaddr);
 844                 break;
 845         }
 846
 847         /* re-enable interrupts if necessary */
 848         if (flag)
 849                 enable_interrupts ();
 850
 851         if (!sect_found)
 852                 sect = find_sector (info, dest);
 853
 854         if (use_flash_status_poll(info))
 855                 return flash_status_poll(info, &cword, dstaddr,
 856                                          info->write_tout, "write");
 857         else
 858                 return flash_full_status_check(info, sect,
 859                                                info->write_tout, "write");
 860 }
 861
 862 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 863
 864 static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
 865                                   int len)
 866 {
 867         flash_sect_t sector;
 868         int cnt;
 869         int retcode;
 870         void *src = cp;
 871         void *dst = (void *)dest;
 872         void *dst2 = dst;
 873         int flag = 0;
 874         uint offset = 0;
 875         unsigned int shift;
 876         uchar write_cmd;
 877
 878         switch (info->portwidth) {
 879         case FLASH_CFI_8BIT:
 880                 shift = 0;
 881                 break;
 882         case FLASH_CFI_16BIT:
 883                 shift = 1;
 884                 break;
 885         case FLASH_CFI_32BIT:
 886                 shift = 2;
 887                 break;
 888         case FLASH_CFI_64BIT:
 889                 shift = 3;
 890                 break;
 891         default:
 892                 retcode = ERR_INVAL;
 893                 goto out_unmap;
 894         }
 895
 896         cnt = len >> shift;
 897
 898         while ((cnt-- > 0) && (flag == 0)) {
 899                 switch (info->portwidth) {
 900                 case FLASH_CFI_8BIT:
 901                         flag = ((flash_read8(dst2) & flash_read8(src)) ==
 902                                 flash_read8(src));
 903                         src += 1, dst2 += 1;
 904                         break;
 905                 case FLASH_CFI_16BIT:
 906                         flag = ((flash_read16(dst2) & flash_read16(src)) ==
 907                                 flash_read16(src));
 908                         src += 2, dst2 += 2;
 909                         break;
 910                 case FLASH_CFI_32BIT:
 911                         flag = ((flash_read32(dst2) & flash_read32(src)) ==
 912                                 flash_read32(src));
 913                         src += 4, dst2 += 4;
 914                         break;
 915                 case FLASH_CFI_64BIT:
 916                         flag = ((flash_read64(dst2) & flash_read64(src)) ==
 917                                 flash_read64(src));
 918                         src += 8, dst2 += 8;
 919                         break;
 920                 }
 921         }
 922         if (!flag) {
 923                 retcode = ERR_NOT_ERASED;
 924                 goto out_unmap;
 925         }
 926
 927         src = cp;
 928         sector = find_sector (info, dest);
 929
 930         switch (info->vendor) {
 931         case CFI_CMDSET_INTEL_PROG_REGIONS:
 932         case CFI_CMDSET_INTEL_STANDARD:
 933         case CFI_CMDSET_INTEL_EXTENDED:
 934                 write_cmd = (info->vendor == CFI_CMDSET_INTEL_PROG_REGIONS) ?
 935                                         FLASH_CMD_WRITE_BUFFER_PROG : FLASH_CMD_WRITE_TO_BUFFER;
 936                 flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 937                 flash_write_cmd (info, sector, 0, FLASH_CMD_READ_STATUS);
 938                 flash_write_cmd (info, sector, 0, write_cmd);
 939                 retcode = flash_status_check (info, sector,
 940                                               info->buffer_write_tout,
 941                                               "write to buffer");
 942                 if (retcode == ERR_OK) {
 943                         /* reduce the number of loops by the width of
 944                          * the port */
 945                         cnt = len >> shift;
 946                         flash_write_cmd (info, sector, 0, cnt - 1);
 947                         while (cnt-- > 0) {
 948                                 switch (info->portwidth) {
 949                                 case FLASH_CFI_8BIT:
 950                                         flash_write8(flash_read8(src), dst);
 951                                         src += 1, dst += 1;
 952                                         break;
 953                                 case FLASH_CFI_16BIT:
 954                                         flash_write16(flash_read16(src), dst);
 955                                         src += 2, dst += 2;
 956                                         break;
 957                                 case FLASH_CFI_32BIT:
 958                                         flash_write32(flash_read32(src), dst);
 959                                         src += 4, dst += 4;
 960                                         break;
 961                                 case FLASH_CFI_64BIT:
 962                                         flash_write64(flash_read64(src), dst);
 963                                         src += 8, dst += 8;
 964                                         break;
 965                                 default:
 966                                         retcode = ERR_INVAL;
 967                                         goto out_unmap;
 968                                 }
 969                         }
 970                         flash_write_cmd (info, sector, 0,
 971                                          FLASH_CMD_WRITE_BUFFER_CONFIRM);
 972                         retcode = flash_full_status_check (
 973                                 info, sector, info->buffer_write_tout,
 974                                 "buffer write");
 975                 }
 976
 977                 break;
 978
 979         case CFI_CMDSET_AMD_STANDARD:
 980         case CFI_CMDSET_AMD_EXTENDED:
 981                 flash_unlock_seq(info,0);
 982
 983 #ifdef CONFIG_FLASH_SPANSION_S29WS_N
 984                 offset = ((unsigned long)dst - info->start[sector]) >> shift;
 985 #endif
 986                 flash_write_cmd(info, sector, offset, AMD_CMD_WRITE_TO_BUFFER);
 987                 cnt = len >> shift;
 988                 flash_write_cmd(info, sector, offset, cnt - 1);
 989
 990                 switch (info->portwidth) {
 991                 case FLASH_CFI_8BIT:
 992                         while (cnt-- > 0) {
 993                                 flash_write8(flash_read8(src), dst);
 994                                 src += 1, dst += 1;
 995                         }
 996                         break;
 997                 case FLASH_CFI_16BIT:
 998                         while (cnt-- > 0) {
 999                                 flash_write16(flash_read16(src), dst);
1000                                 src += 2, dst += 2;
1001                         }
1002                         break;
1003                 case FLASH_CFI_32BIT:
1004                         while (cnt-- > 0) {
1005                                 flash_write32(flash_read32(src), dst);
1006                                 src += 4, dst += 4;
1007                         }
1008                         break;
1009                 case FLASH_CFI_64BIT:
1010                         while (cnt-- > 0) {
1011                                 flash_write64(flash_read64(src), dst);
1012                                 src += 8, dst += 8;
1013                         }
1014                         break;
1015                 default:
1016                         retcode = ERR_INVAL;
1017                         goto out_unmap;
1018                 }
1019
1020                 flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
1021                 if (use_flash_status_poll(info))
1022                         retcode = flash_status_poll(info, src - (1 << shift),
1023                                                     dst - (1 << shift),
1024                                                     info->buffer_write_tout,
1025                                                     "buffer write");
1026                 else
1027                         retcode = flash_full_status_check(info, sector,
1028                                                           info->buffer_write_tout,
1029                                                           "buffer write");
1030                 break;
1031
1032         default:
1033                 debug ("Unknown Command Set\n");
1034                 retcode = ERR_INVAL;
1035                 break;
1036         }
1037
1038 out_unmap:
1039         return retcode;
1040 }
1041 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1042
1043
1044 /*-----------------------------------------------------------------------
1045  */
1046 int flash_erase (flash_info_t * info, int s_first, int s_last)
1047 {
1048         int rcode = 0;
1049         int prot;
1050         flash_sect_t sect;
1051         int st;
1052
1053         if (info->flash_id != FLASH_MAN_CFI) {
1054                 puts ("Can't erase unknown flash type - aborted\n");
1055                 return 1;
1056         }
1057         if ((s_first < 0) || (s_first > s_last)) {
1058                 puts ("- no sectors to erase\n");
1059                 return 1;
1060         }
1061
1062         prot = 0;
1063         for (sect = s_first; sect <= s_last; ++sect) {
1064                 if (info->protect[sect]) {
1065                         prot++;
1066                 }
1067         }
1068         if (prot) {
1069                 printf ("- Warning: %d protected sectors will not be erased!\n",
1070                         prot);
1071         } else if (flash_verbose) {
1072                 putc ('\n');
1073         }
1074
1075
1076         for (sect = s_first; sect <= s_last; sect++) {
1077                 if (info->protect[sect] == 0) { /* not protected */
1078                         switch (info->vendor) {
1079                         case CFI_CMDSET_INTEL_PROG_REGIONS:
1080                         case CFI_CMDSET_INTEL_STANDARD:
1081                         case CFI_CMDSET_INTEL_EXTENDED:
1082                                 flash_write_cmd (info, sect, 0,
1083                                                  FLASH_CMD_CLEAR_STATUS);
1084                                 flash_write_cmd (info, sect, 0,
1085                                                  FLASH_CMD_BLOCK_ERASE);
1086                                 flash_write_cmd (info, sect, 0,
1087                                                  FLASH_CMD_ERASE_CONFIRM);
1088                                 break;
1089                         case CFI_CMDSET_AMD_STANDARD:
1090                         case CFI_CMDSET_AMD_EXTENDED:
1091                                 flash_unlock_seq (info, sect);
1092                                 flash_write_cmd (info, sect,
1093                                                 info->addr_unlock1,
1094                                                 AMD_CMD_ERASE_START);
1095                                 flash_unlock_seq (info, sect);
1096                                 flash_write_cmd (info, sect, 0,
1097                                                  AMD_CMD_ERASE_SECTOR);
1098                                 break;
1099 #ifdef CONFIG_FLASH_CFI_LEGACY
1100                         case CFI_CMDSET_AMD_LEGACY:
1101                                 flash_unlock_seq (info, 0);
1102                                 flash_write_cmd (info, 0, info->addr_unlock1,
1103                                                 AMD_CMD_ERASE_START);
1104                                 flash_unlock_seq (info, 0);
1105                                 flash_write_cmd (info, sect, 0,
1106                                                 AMD_CMD_ERASE_SECTOR);
1107                                 break;
1108 #endif
1109                         default:
1110                                 debug ("Unkown flash vendor %d\n",
1111                                        info->vendor);
1112                                 break;
1113                         }
1114
1115                         if (use_flash_status_poll(info)) {
1116                                 cfiword_t cword = (cfiword_t)0xffffffffffffffffULL;
1117                                 void *dest;
1118                                 dest = flash_map(info, sect, 0);
1119                                 st = flash_status_poll(info, &cword, dest,
1120                                                        info->erase_blk_tout, "erase");
1121                                 flash_unmap(info, sect, 0, dest);
1122                         } else
1123                                 st = flash_full_status_check(info, sect,
1124                                                              info->erase_blk_tout,
1125                                                              "erase");
1126                         if (st)
1127                                 rcode = 1;
1128                         else if (flash_verbose)
1129                                 putc ('.');
1130                 }
1131         }
1132
1133         if (flash_verbose)
1134                 puts (" done\n");
1135
1136         return rcode;
1137 }
1138
1139 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1140 static int sector_erased(flash_info_t *info, int i)
1141 {
1142         int k;
1143         int size;
1144         u32 *flash;
1145
1146         /*
1147          * Check if whole sector is erased
1148          */
1149         size = flash_sector_size(info, i);
1150         flash = (u32 *)info->start[i];
1151         /* divide by 4 for longword access */
1152         size = size >> 2;
1153
1154         for (k = 0; k < size; k++) {
1155                 if (flash_read32(flash++) != 0xffffffff)
1156                         return 0;       /* not erased */
1157         }
1158
1159         return 1;                       /* erased */
1160 }
1161 #endif /* CONFIG_SYS_FLASH_EMPTY_INFO */
1162
1163 void flash_print_info (flash_info_t * info)
1164 {
1165         int i;
1166
1167         if (info->flash_id != FLASH_MAN_CFI) {
1168                 puts ("missing or unknown FLASH type\n");
1169                 return;
1170         }
1171
1172         printf ("%s flash (%d x %d)",
1173                 info->name,
1174                 (info->portwidth << 3), (info->chipwidth << 3));
1175         if (info->size < 1024*1024)
1176                 printf ("  Size: %ld kB in %d Sectors\n",
1177                         info->size >> 10, info->sector_count);
1178         else
1179                 printf ("  Size: %ld MB in %d Sectors\n",
1180                         info->size >> 20, info->sector_count);
1181         printf ("  ");
1182         switch (info->vendor) {
1183                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1184                         printf ("Intel Prog Regions");
1185                         break;
1186                 case CFI_CMDSET_INTEL_STANDARD:
1187                         printf ("Intel Standard");
1188                         break;
1189                 case CFI_CMDSET_INTEL_EXTENDED:
1190                         printf ("Intel Extended");
1191                         break;
1192                 case CFI_CMDSET_AMD_STANDARD:
1193                         printf ("AMD Standard");
1194                         break;
1195                 case CFI_CMDSET_AMD_EXTENDED:
1196                         printf ("AMD Extended");
1197                         break;
1198 #ifdef CONFIG_FLASH_CFI_LEGACY
1199                 case CFI_CMDSET_AMD_LEGACY:
1200                         printf ("AMD Legacy");
1201                         break;
1202 #endif
1203                 default:
1204                         printf ("Unknown (%d)", info->vendor);
1205                         break;
1206         }
1207         printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x",
1208                 info->manufacturer_id);
1209         printf (info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1210                 info->device_id);
1211         if ((info->device_id & 0xff) == 0x7E) {
1212                 printf(info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1213                 info->device_id2);
1214         }
1215         printf ("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
1216                 info->erase_blk_tout,
1217                 info->write_tout);
1218         if (info->buffer_size > 1) {
1219                 printf ("  Buffer write timeout: %ld ms, "
1220                         "buffer size: %d bytes\n",
1221                 info->buffer_write_tout,
1222                 info->buffer_size);
1223         }
1224
1225         puts ("\n  Sector Start Addresses:");
1226         for (i = 0; i < info->sector_count; ++i) {
1227                 if (ctrlc())
1228                         break;
1229                 if ((i % 5) == 0)
1230                         putc('\n');
1231 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1232                 /* print empty and read-only info */
1233                 printf ("  %08lX %c %s ",
1234                         info->start[i],
1235                         sector_erased(info, i) ? 'E' : ' ',
1236                         info->protect[i] ? "RO" : "  ");
1237 #else   /* ! CONFIG_SYS_FLASH_EMPTY_INFO */
1238                 printf ("  %08lX   %s ",
1239                         info->start[i],
1240                         info->protect[i] ? "RO" : "  ");
1241 #endif
1242         }
1243         putc ('\n');
1244         return;
1245 }
1246
1247 /*-----------------------------------------------------------------------
1248  * This is used in a few places in write_buf() to show programming
1249  * progress.  Making it a function is nasty because it needs to do side
1250  * effect updates to digit and dots.  Repeated code is nasty too, so
1251  * we define it once here.
1252  */
1253 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1254 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub) \
1255         if (flash_verbose) { \
1256                 dots -= dots_sub; \
1257                 if ((scale > 0) && (dots <= 0)) { \
1258                         if ((digit % 5) == 0) \
1259                                 printf ("%d", digit / 5); \
1260                         else \
1261                                 putc ('.'); \
1262                         digit--; \
1263                         dots += scale; \
1264                 } \
1265         }
1266 #else
1267 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub)
1268 #endif
1269
1270 /*-----------------------------------------------------------------------
1271  * Copy memory to flash, returns:
1272  * 0 - OK
1273  * 1 - write timeout
1274  * 2 - Flash not erased
1275  */
1276 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
1277 {
1278         ulong wp;
1279         uchar *p;
1280         int aln;
1281         cfiword_t cword;
1282         int i, rc;
1283 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1284         int buffered_size;
1285 #endif
1286 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1287         int digit = CONFIG_FLASH_SHOW_PROGRESS;
1288         int scale = 0;
1289         int dots  = 0;
1290
1291         /*
1292          * Suppress if there are fewer than CONFIG_FLASH_SHOW_PROGRESS writes.
1293          */
1294         if (cnt >= CONFIG_FLASH_SHOW_PROGRESS) {
1295                 scale = (int)((cnt + CONFIG_FLASH_SHOW_PROGRESS - 1) /
1296                         CONFIG_FLASH_SHOW_PROGRESS);
1297         }
1298 #endif
1299
1300         /* get lower aligned address */
1301         wp = (addr & ~(info->portwidth - 1));
1302
1303         /* handle unaligned start */
1304         if ((aln = addr - wp) != 0) {
1305                 cword.l = 0;
1306                 p = (uchar *)wp;
1307                 for (i = 0; i < aln; ++i)
1308                         flash_add_byte (info, &cword, flash_read8(p + i));
1309
1310                 for (; (i < info->portwidth) && (cnt > 0); i++) {
1311                         flash_add_byte (info, &cword, *src++);
1312                         cnt--;
1313                 }
1314                 for (; (cnt == 0) && (i < info->portwidth); ++i)
1315                         flash_add_byte (info, &cword, flash_read8(p + i));
1316
1317                 rc = flash_write_cfiword (info, wp, cword);
1318                 if (rc != 0)
1319                         return rc;
1320
1321                 wp += i;
1322                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1323         }
1324
1325         /* handle the aligned part */
1326 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1327         buffered_size = (info->portwidth / info->chipwidth);
1328         buffered_size *= info->buffer_size;
1329         while (cnt >= info->portwidth) {
1330                 /* prohibit buffer write when buffer_size is 1 */
1331                 if (info->buffer_size == 1) {
1332                         cword.l = 0;
1333                         for (i = 0; i < info->portwidth; i++)
1334                                 flash_add_byte (info, &cword, *src++);
1335                         if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1336                                 return rc;
1337                         wp += info->portwidth;
1338                         cnt -= info->portwidth;
1339                         continue;
1340                 }
1341
1342                 /* write buffer until next buffered_size aligned boundary */
1343                 i = buffered_size - (wp % buffered_size);
1344                 if (i > cnt)
1345                         i = cnt;
1346                 if ((rc = flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
1347                         return rc;
1348                 i -= i & (info->portwidth - 1);
1349                 wp += i;
1350                 src += i;
1351                 cnt -= i;
1352                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1353         }
1354 #else
1355         while (cnt >= info->portwidth) {
1356                 cword.l = 0;
1357                 for (i = 0; i < info->portwidth; i++) {
1358                         flash_add_byte (info, &cword, *src++);
1359                 }
1360                 if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
1361                         return rc;
1362                 wp += info->portwidth;
1363                 cnt -= info->portwidth;
1364                 FLASH_SHOW_PROGRESS(scale, dots, digit, info->portwidth);
1365         }
1366 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1367
1368         if (cnt == 0) {
1369                 return (0);
1370         }
1371
1372         /*
1373          * handle unaligned tail bytes
1374          */
1375         cword.l = 0;
1376         p = (uchar *)wp;
1377         for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
1378                 flash_add_byte (info, &cword, *src++);
1379                 --cnt;
1380         }
1381         for (; i < info->portwidth; ++i)
1382                 flash_add_byte (info, &cword, flash_read8(p + i));
1383
1384         return flash_write_cfiword (info, wp, cword);
1385 }
1386
1387 /*-----------------------------------------------------------------------
1388  */
1389 #ifdef CONFIG_SYS_FLASH_PROTECTION
1390
1391 int flash_real_protect (flash_info_t * info, long sector, int prot)
1392 {
1393         int retcode = 0;
1394
1395         switch (info->vendor) {
1396                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1397                 case CFI_CMDSET_INTEL_STANDARD:
1398                 case CFI_CMDSET_INTEL_EXTENDED:
1399                         /*
1400                          * see errata called
1401                          * "Numonyx Axcell P33/P30 Specification Update" :)
1402                          */
1403                         flash_write_cmd (info, sector, 0, FLASH_CMD_READ_ID);
1404                         if (!flash_isequal (info, sector, FLASH_OFFSET_PROTECT,
1405                                             prot)) {
1406                                 /*
1407                                  * cmd must come before FLASH_CMD_PROTECT + 20us
1408                                  * Disable interrupts which might cause a timeout here.
1409                                  */
1410                                 int flag = disable_interrupts ();
1411                                 unsigned short cmd;
1412
1413                                 if (prot)
1414                                         cmd = FLASH_CMD_PROTECT_SET;
1415                                 else
1416                                         cmd = FLASH_CMD_PROTECT_CLEAR;
1417
1418                                 flash_write_cmd (info, sector, 0,
1419                                                   FLASH_CMD_PROTECT);
1420                                 flash_write_cmd (info, sector, 0, cmd);
1421                                 /* re-enable interrupts if necessary */
1422                                 if (flag)
1423                                         enable_interrupts ();
1424                         }
1425                         break;
1426                 case CFI_CMDSET_AMD_EXTENDED:
1427                 case CFI_CMDSET_AMD_STANDARD:
1428                         /* U-Boot only checks the first byte */
1429                         if (info->manufacturer_id == (uchar)ATM_MANUFACT) {
1430                                 if (prot) {
1431                                         flash_unlock_seq (info, 0);
1432                                         flash_write_cmd (info, 0,
1433                                                         info->addr_unlock1,
1434                                                         ATM_CMD_SOFTLOCK_START);
1435                                         flash_unlock_seq (info, 0);
1436                                         flash_write_cmd (info, sector, 0,
1437                                                         ATM_CMD_LOCK_SECT);
1438                                 } else {
1439                                         flash_write_cmd (info, 0,
1440                                                         info->addr_unlock1,
1441                                                         AMD_CMD_UNLOCK_START);
1442                                         if (info->device_id == ATM_ID_BV6416)
1443                                                 flash_write_cmd (info, sector,
1444                                                         0, ATM_CMD_UNLOCK_SECT);
1445                                 }
1446                         }
1447                         break;
1448 #ifdef CONFIG_FLASH_CFI_LEGACY
1449                 case CFI_CMDSET_AMD_LEGACY:
1450                         flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1451                         flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
1452                         if (prot)
1453                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
1454                         else
1455                                 flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
1456 #endif
1457         };
1458
1459         /*
1460          * Flash needs to be in status register read mode for
1461          * flash_full_status_check() to work correctly
1462          */
1463         flash_write_cmd(info, sector, 0, FLASH_CMD_READ_STATUS);
1464         if ((retcode =
1465              flash_full_status_check (info, sector, info->erase_blk_tout,
1466                                       prot ? "protect" : "unprotect")) == 0) {
1467
1468                 info->protect[sector] = prot;
1469
1470                 /*
1471                  * On some of Intel's flash chips (marked via legacy_unlock)
1472                  * unprotect unprotects all locking.
1473                  */
1474                 if ((prot == 0) && (info->legacy_unlock)) {
1475                         flash_sect_t i;
1476
1477                         for (i = 0; i < info->sector_count; i++) {
1478                                 if (info->protect[i])
1479                                         flash_real_protect (info, i, 1);
1480                         }
1481                 }
1482         }
1483         return retcode;
1484 }
1485
1486 /*-----------------------------------------------------------------------
1487  * flash_read_user_serial - read the OneTimeProgramming cells
1488  */
1489 void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
1490                              int len)
1491 {
1492         uchar *src;
1493         uchar *dst;
1494
1495         dst = buffer;
1496         src = flash_map (info, 0, FLASH_OFFSET_USER_PROTECTION);
1497         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1498         memcpy (dst, src + offset, len);
1499         flash_write_cmd (info, 0, 0, info->cmd_reset);
1500         udelay(1);
1501         flash_unmap(info, 0, FLASH_OFFSET_USER_PROTECTION, src);
1502 }
1503
1504 /*
1505  * flash_read_factory_serial - read the device Id from the protection area
1506  */
1507 void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
1508                                 int len)
1509 {
1510         uchar *src;
1511
1512         src = flash_map (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
1513         flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
1514         memcpy (buffer, src + offset, len);
1515         flash_write_cmd (info, 0, 0, info->cmd_reset);
1516         udelay(1);
1517         flash_unmap(info, 0, FLASH_OFFSET_INTEL_PROTECTION, src);
1518 }
1519
1520 #endif /* CONFIG_SYS_FLASH_PROTECTION */
1521
1522 /*-----------------------------------------------------------------------
1523  * Reverse the order of the erase regions in the CFI QRY structure.
1524  * This is needed for chips that are either a) correctly detected as
1525  * top-boot, or b) buggy.
1526  */
1527 static void cfi_reverse_geometry(struct cfi_qry *qry)
1528 {
1529         unsigned int i, j;
1530         u32 tmp;
1531
1532         for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) {
1533                 tmp = qry->erase_region_info[i];
1534                 qry->erase_region_info[i] = qry->erase_region_info[j];
1535                 qry->erase_region_info[j] = tmp;
1536         }
1537 }
1538
1539 /*-----------------------------------------------------------------------
1540  * read jedec ids from device and set corresponding fields in info struct
1541  *
1542  * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
1543  *
1544  */
1545 static void cmdset_intel_read_jedec_ids(flash_info_t *info)
1546 {
1547         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1548         udelay(1);
1549         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1550         udelay(1000); /* some flash are slow to respond */
1551         info->manufacturer_id = flash_read_uchar (info,
1552                                         FLASH_OFFSET_MANUFACTURER_ID);
1553         info->device_id = (info->chipwidth == FLASH_CFI_16BIT) ?
1554                         flash_read_word (info, FLASH_OFFSET_DEVICE_ID) :
1555                         flash_read_uchar (info, FLASH_OFFSET_DEVICE_ID);
1556         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1557 }
1558
1559 static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry)
1560 {
1561         info->cmd_reset = FLASH_CMD_RESET;
1562
1563         cmdset_intel_read_jedec_ids(info);
1564         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1565
1566 #ifdef CONFIG_SYS_FLASH_PROTECTION
1567         /* read legacy lock/unlock bit from intel flash */
1568         if (info->ext_addr) {
1569                 info->legacy_unlock = flash_read_uchar (info,
1570                                 info->ext_addr + 5) & 0x08;
1571         }
1572 #endif
1573
1574         return 0;
1575 }
1576
1577 static void cmdset_amd_read_jedec_ids(flash_info_t *info)
1578 {
1579         ushort bankId = 0;
1580         uchar  manuId;
1581
1582         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1583         flash_unlock_seq(info, 0);
1584         flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
1585         udelay(1000); /* some flash are slow to respond */
1586
1587         manuId = flash_read_uchar (info, FLASH_OFFSET_MANUFACTURER_ID);
1588         /* JEDEC JEP106Z specifies ID codes up to bank 7 */
1589         while (manuId == FLASH_CONTINUATION_CODE && bankId < 0x800) {
1590                 bankId += 0x100;
1591                 manuId = flash_read_uchar (info,
1592                         bankId | FLASH_OFFSET_MANUFACTURER_ID);
1593         }
1594         info->manufacturer_id = manuId;
1595
1596         switch (info->chipwidth){
1597         case FLASH_CFI_8BIT:
1598                 info->device_id = flash_read_uchar (info,
1599                                                 FLASH_OFFSET_DEVICE_ID);
1600                 if (info->device_id == 0x7E) {
1601                         /* AMD 3-byte (expanded) device ids */
1602                         info->device_id2 = flash_read_uchar (info,
1603                                                 FLASH_OFFSET_DEVICE_ID2);
1604                         info->device_id2 <<= 8;
1605                         info->device_id2 |= flash_read_uchar (info,
1606                                                 FLASH_OFFSET_DEVICE_ID3);
1607                 }
1608                 break;
1609         case FLASH_CFI_16BIT:
1610                 info->device_id = flash_read_word (info,
1611                                                 FLASH_OFFSET_DEVICE_ID);
1612                 if ((info->device_id & 0xff) == 0x7E) {
1613                         /* AMD 3-byte (expanded) device ids */
1614                         info->device_id2 = flash_read_uchar (info,
1615                                                 FLASH_OFFSET_DEVICE_ID2);
1616                         info->device_id2 <<= 8;
1617                         info->device_id2 |= flash_read_uchar (info,
1618                                                 FLASH_OFFSET_DEVICE_ID3);
1619                 }
1620                 break;
1621         default:
1622                 break;
1623         }
1624         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1625         udelay(1);
1626 }
1627
1628 static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry)
1629 {
1630         info->cmd_reset = AMD_CMD_RESET;
1631
1632         cmdset_amd_read_jedec_ids(info);
1633         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1634
1635         return 0;
1636 }
1637
1638 #ifdef CONFIG_FLASH_CFI_LEGACY
1639 static void flash_read_jedec_ids (flash_info_t * info)
1640 {
1641         info->manufacturer_id = 0;
1642         info->device_id       = 0;
1643         info->device_id2      = 0;
1644
1645         switch (info->vendor) {
1646         case CFI_CMDSET_INTEL_PROG_REGIONS:
1647         case CFI_CMDSET_INTEL_STANDARD:
1648         case CFI_CMDSET_INTEL_EXTENDED:
1649                 cmdset_intel_read_jedec_ids(info);
1650                 break;
1651         case CFI_CMDSET_AMD_STANDARD:
1652         case CFI_CMDSET_AMD_EXTENDED:
1653                 cmdset_amd_read_jedec_ids(info);
1654                 break;
1655         default:
1656                 break;
1657         }
1658 }
1659
1660 /*-----------------------------------------------------------------------
1661  * Call board code to request info about non-CFI flash.
1662  * board_flash_get_legacy needs to fill in at least:
1663  * info->portwidth, info->chipwidth and info->interface for Jedec probing.
1664  */
1665 static int flash_detect_legacy(phys_addr_t base, int banknum)
1666 {
1667         flash_info_t *info = &flash_info[banknum];
1668
1669         if (board_flash_get_legacy(base, banknum, info)) {
1670                 /* board code may have filled info completely. If not, we
1671                    use JEDEC ID probing. */
1672                 if (!info->vendor) {
1673                         int modes[] = {
1674                                 CFI_CMDSET_AMD_STANDARD,
1675                                 CFI_CMDSET_INTEL_STANDARD
1676                         };
1677                         int i;
1678
1679                         for (i = 0; i < sizeof(modes) / sizeof(modes[0]); i++) {
1680                                 info->vendor = modes[i];
1681                                 info->start[0] =
1682                                         (ulong)map_physmem(base,
1683                                                            info->portwidth,
1684                                                            MAP_NOCACHE);
1685                                 if (info->portwidth == FLASH_CFI_8BIT
1686                                         && info->interface == FLASH_CFI_X8X16) {
1687                                         info->addr_unlock1 = 0x2AAA;
1688                                         info->addr_unlock2 = 0x5555;
1689                                 } else {
1690                                         info->addr_unlock1 = 0x5555;
1691                                         info->addr_unlock2 = 0x2AAA;
1692                                 }
1693                                 flash_read_jedec_ids(info);
1694                                 debug("JEDEC PROBE: ID %x %x %x\n",
1695                                                 info->manufacturer_id,
1696                                                 info->device_id,
1697                                                 info->device_id2);
1698                                 if (jedec_flash_match(info, info->start[0]))
1699                                         break;
1700                                 else
1701                                         unmap_physmem((void *)info->start[0],
1702                                                       MAP_NOCACHE);
1703                         }
1704                 }
1705
1706                 switch(info->vendor) {
1707                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1708                 case CFI_CMDSET_INTEL_STANDARD:
1709                 case CFI_CMDSET_INTEL_EXTENDED:
1710                         info->cmd_reset = FLASH_CMD_RESET;
1711                         break;
1712                 case CFI_CMDSET_AMD_STANDARD:
1713                 case CFI_CMDSET_AMD_EXTENDED:
1714                 case CFI_CMDSET_AMD_LEGACY:
1715                         info->cmd_reset = AMD_CMD_RESET;
1716                         break;
1717                 }
1718                 info->flash_id = FLASH_MAN_CFI;
1719                 return 1;
1720         }
1721         return 0; /* use CFI */
1722 }
1723 #else
1724 static inline int flash_detect_legacy(phys_addr_t base, int banknum)
1725 {
1726         return 0; /* use CFI */
1727 }
1728 #endif
1729
1730 /*-----------------------------------------------------------------------
1731  * detect if flash is compatible with the Common Flash Interface (CFI)
1732  * http://www.jedec.org/download/search/jesd68.pdf
1733  */
1734 static void flash_read_cfi (flash_info_t *info, void *buf,
1735                 unsigned int start, size_t len)
1736 {
1737         u8 *p = buf;
1738         unsigned int i;
1739
1740         for (i = 0; i < len; i++)
1741                 p[i] = flash_read_uchar(info, start + i);
1742 }
1743
1744 void __flash_cmd_reset(flash_info_t *info)
1745 {
1746         /*
1747          * We do not yet know what kind of commandset to use, so we issue
1748          * the reset command in both Intel and AMD variants, in the hope
1749          * that AMD flash roms ignore the Intel command.
1750          */
1751         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1752         udelay(1);
1753         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1754 }
1755 void flash_cmd_reset(flash_info_t *info)
1756         __attribute__((weak,alias("__flash_cmd_reset")));
1757
1758 static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1759 {
1760         int cfi_offset;
1761
1762         /* Issue FLASH reset command */
1763         flash_cmd_reset(info);
1764
1765         for (cfi_offset=0;
1766              cfi_offset < sizeof(flash_offset_cfi) / sizeof(uint);
1767              cfi_offset++) {
1768                 flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset],
1769                                  FLASH_CMD_CFI);
1770                 if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
1771                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
1772                     && flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
1773                         flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
1774                                         sizeof(struct cfi_qry));
1775                         info->interface = le16_to_cpu(qry->interface_desc);
1776
1777                         info->cfi_offset = flash_offset_cfi[cfi_offset];
1778                         debug ("device interface is %d\n",
1779                                info->interface);
1780                         debug ("found port %d chip %d ",
1781                                info->portwidth, info->chipwidth);
1782                         debug ("port %d bits chip %d bits\n",
1783                                info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1784                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1785
1786                         /* calculate command offsets as in the Linux driver */
1787                         info->addr_unlock1 = 0x555;
1788                         info->addr_unlock2 = 0x2aa;
1789
1790                         /*
1791                          * modify the unlock address if we are
1792                          * in compatibility mode
1793                          */
1794                         if (    /* x8/x16 in x8 mode */
1795                                 ((info->chipwidth == FLASH_CFI_BY8) &&
1796                                         (info->interface == FLASH_CFI_X8X16)) ||
1797                                 /* x16/x32 in x16 mode */
1798                                 ((info->chipwidth == FLASH_CFI_BY16) &&
1799                                         (info->interface == FLASH_CFI_X16X32)))
1800                         {
1801                                 info->addr_unlock1 = 0xaaa;
1802                                 info->addr_unlock2 = 0x555;
1803                         }
1804
1805                         info->name = "CFI conformant";
1806                         return 1;
1807                 }
1808         }
1809
1810         return 0;
1811 }
1812
1813 static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry)
1814 {
1815         debug ("flash detect cfi\n");
1816
1817         for (info->portwidth = CONFIG_SYS_FLASH_CFI_WIDTH;
1818              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
1819                 for (info->chipwidth = FLASH_CFI_BY8;
1820                      info->chipwidth <= info->portwidth;
1821                      info->chipwidth <<= 1)
1822                         if (__flash_detect_cfi(info, qry))
1823                                 return 1;
1824         }
1825         debug ("not found\n");
1826         return 0;
1827 }
1828
1829 /*
1830  * Manufacturer-specific quirks. Add workarounds for geometry
1831  * reversal, etc. here.
1832  */
1833 static void flash_fixup_amd(flash_info_t *info, struct cfi_qry *qry)
1834 {
1835         /* check if flash geometry needs reversal */
1836         if (qry->num_erase_regions > 1) {
1837                 /* reverse geometry if top boot part */
1838                 if (info->cfi_version < 0x3131) {
1839                         /* CFI < 1.1, try to guess from device id */
1840                         if ((info->device_id & 0x80) != 0)
1841                                 cfi_reverse_geometry(qry);
1842                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
1843                         /* CFI >= 1.1, deduct from top/bottom flag */
1844                         /* note: ext_addr is valid since cfi_version > 0 */
1845                         cfi_reverse_geometry(qry);
1846                 }
1847         }
1848 }
1849
1850 static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
1851 {
1852         int reverse_geometry = 0;
1853
1854         /* Check the "top boot" bit in the PRI */
1855         if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1))
1856                 reverse_geometry = 1;
1857
1858         /* AT49BV6416(T) list the erase regions in the wrong order.
1859          * However, the device ID is identical with the non-broken
1860          * AT49BV642D they differ in the high byte.
1861          */
1862         if (info->device_id == 0xd6 || info->device_id == 0xd2)
1863                 reverse_geometry = !reverse_geometry;
1864
1865         if (reverse_geometry)
1866                 cfi_reverse_geometry(qry);
1867 }
1868
1869 static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
1870 {
1871         /* check if flash geometry needs reversal */
1872         if (qry->num_erase_regions > 1) {
1873                 /* reverse geometry if top boot part */
1874                 if (info->cfi_version < 0x3131) {
1875                         /* CFI < 1.1, guess by device id */
1876                         if (info->device_id == 0x22CA || /* M29W320DT */
1877                             info->device_id == 0x2256 || /* M29W320ET */
1878                             info->device_id == 0x22D7) { /* M29W800DT */
1879                                 cfi_reverse_geometry(qry);
1880                         }
1881                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
1882                         /* CFI >= 1.1, deduct from top/bottom flag */
1883                         /* note: ext_addr is valid since cfi_version > 0 */
1884                         cfi_reverse_geometry(qry);
1885                 }
1886         }
1887 }
1888
1889 /*
1890  * The following code cannot be run from FLASH!
1891  *
1892  */
1893 ulong flash_get_size (phys_addr_t base, int banknum)
1894 {
1895         flash_info_t *info = &flash_info[banknum];
1896         int i, j;
1897         flash_sect_t sect_cnt;
1898         phys_addr_t sector;
1899         unsigned long tmp;
1900         int size_ratio;
1901         uchar num_erase_regions;
1902         int erase_region_size;
1903         int erase_region_count;
1904         struct cfi_qry qry;
1905         unsigned long max_size;
1906
1907         memset(&qry, 0, sizeof(qry));
1908
1909         info->ext_addr = 0;
1910         info->cfi_version = 0;
1911 #ifdef CONFIG_SYS_FLASH_PROTECTION
1912         info->legacy_unlock = 0;
1913 #endif
1914
1915         info->start[0] = (ulong)map_physmem(base, info->portwidth, MAP_NOCACHE);
1916
1917         if (flash_detect_cfi (info, &qry)) {
1918                 info->vendor = le16_to_cpu(qry.p_id);
1919                 info->ext_addr = le16_to_cpu(qry.p_adr);
1920                 num_erase_regions = qry.num_erase_regions;
1921
1922                 if (info->ext_addr) {
1923                         info->cfi_version = (ushort) flash_read_uchar (info,
1924                                                 info->ext_addr + 3) << 8;
1925                         info->cfi_version |= (ushort) flash_read_uchar (info,
1926                                                 info->ext_addr + 4);
1927                 }
1928
1929 #ifdef DEBUG
1930                 flash_printqry (&qry);
1931 #endif
1932
1933                 switch (info->vendor) {
1934                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1935                 case CFI_CMDSET_INTEL_STANDARD:
1936                 case CFI_CMDSET_INTEL_EXTENDED:
1937                         cmdset_intel_init(info, &qry);
1938                         break;
1939                 case CFI_CMDSET_AMD_STANDARD:
1940                 case CFI_CMDSET_AMD_EXTENDED:
1941                         cmdset_amd_init(info, &qry);
1942                         break;
1943                 default:
1944                         printf("CFI: Unknown command set 0x%x\n",
1945                                         info->vendor);
1946                         /*
1947                          * Unfortunately, this means we don't know how
1948                          * to get the chip back to Read mode. Might
1949                          * as well try an Intel-style reset...
1950                          */
1951                         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1952                         return 0;
1953                 }
1954
1955                 /* Do manufacturer-specific fixups */
1956                 switch (info->manufacturer_id) {
1957                 case 0x0001: /* AMD */
1958                 case 0x0037: /* AMIC */
1959                         flash_fixup_amd(info, &qry);
1960                         break;
1961                 case 0x001f:
1962                         flash_fixup_atmel(info, &qry);
1963                         break;
1964                 case 0x0020:
1965                         flash_fixup_stm(info, &qry);
1966                         break;
1967                 }
1968
1969                 debug ("manufacturer is %d\n", info->vendor);
1970                 debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
1971                 debug ("device id is 0x%x\n", info->device_id);
1972                 debug ("device id2 is 0x%x\n", info->device_id2);
1973                 debug ("cfi version is 0x%04x\n", info->cfi_version);
1974
1975                 size_ratio = info->portwidth / info->chipwidth;
1976                 /* if the chip is x8/x16 reduce the ratio by half */
1977                 if ((info->interface == FLASH_CFI_X8X16)
1978                     && (info->chipwidth == FLASH_CFI_BY8)) {
1979                         size_ratio >>= 1;
1980                 }
1981                 debug ("size_ratio %d port %d bits chip %d bits\n",
1982                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1983                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1984                 info->size = 1 << qry.dev_size;
1985                 /* multiply the size by the number of chips */
1986                 info->size *= size_ratio;
1987                 max_size = cfi_flash_bank_size(banknum);
1988                 if (max_size && (info->size > max_size)) {
1989                         debug("[truncated from %ldMiB]", info->size >> 20);
1990                         info->size = max_size;
1991                 }
1992                 debug ("found %d erase regions\n", num_erase_regions);
1993                 sect_cnt = 0;
1994                 sector = base;
1995                 for (i = 0; i < num_erase_regions; i++) {
1996                         if (i > NUM_ERASE_REGIONS) {
1997                                 printf ("%d erase regions found, only %d used\n",
1998                                         num_erase_regions, NUM_ERASE_REGIONS);
1999                                 break;
2000                         }
2001
2002                         tmp = le32_to_cpu(qry.erase_region_info[i]);
2003                         debug("erase region %u: 0x%08lx\n", i, tmp);
2004
2005                         erase_region_count = (tmp & 0xffff) + 1;
2006                         tmp >>= 16;
2007                         erase_region_size =
2008                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
2009                         debug ("erase_region_count = %d erase_region_size = %d\n",
2010                                 erase_region_count, erase_region_size);
2011                         for (j = 0; j < erase_region_count; j++) {
2012                                 if (sector - base >= info->size)
2013                                         break;
2014                                 if (sect_cnt >= CONFIG_SYS_MAX_FLASH_SECT) {
2015                                         printf("ERROR: too many flash sectors\n");
2016                                         break;
2017                                 }
2018                                 info->start[sect_cnt] =
2019                                         (ulong)map_physmem(sector,
2020                                                            info->portwidth,
2021                                                            MAP_NOCACHE);
2022                                 sector += (erase_region_size * size_ratio);
2023
2024                                 /*
2025                                  * Only read protection status from
2026                                  * supported devices (intel...)
2027                                  */
2028                                 switch (info->vendor) {
2029                                 case CFI_CMDSET_INTEL_PROG_REGIONS:
2030                                 case CFI_CMDSET_INTEL_EXTENDED:
2031                                 case CFI_CMDSET_INTEL_STANDARD:
2032                                         /*
2033                                          * Set flash to read-id mode. Otherwise
2034                                          * reading protected status is not
2035                                          * guaranteed.
2036                                          */
2037                                         flash_write_cmd(info, sect_cnt, 0,
2038                                                         FLASH_CMD_READ_ID);
2039                                         info->protect[sect_cnt] =
2040                                                 flash_isset (info, sect_cnt,
2041                                                              FLASH_OFFSET_PROTECT,
2042                                                              FLASH_STATUS_PROTECT);
2043                                         break;
2044                                 default:
2045                                         /* default: not protected */
2046                                         info->protect[sect_cnt] = 0;
2047                                 }
2048
2049                                 sect_cnt++;
2050                         }
2051                 }
2052
2053                 info->sector_count = sect_cnt;
2054                 info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
2055                 tmp = 1 << qry.block_erase_timeout_typ;
2056                 info->erase_blk_tout = tmp *
2057                         (1 << qry.block_erase_timeout_max);
2058                 tmp = (1 << qry.buf_write_timeout_typ) *
2059                         (1 << qry.buf_write_timeout_max);
2060
2061                 /* round up when converting to ms */
2062                 info->buffer_write_tout = (tmp + 999) / 1000;
2063                 tmp = (1 << qry.word_write_timeout_typ) *
2064                         (1 << qry.word_write_timeout_max);
2065                 /* round up when converting to ms */
2066                 info->write_tout = (tmp + 999) / 1000;
2067                 info->flash_id = FLASH_MAN_CFI;
2068                 if ((info->interface == FLASH_CFI_X8X16) &&
2069                     (info->chipwidth == FLASH_CFI_BY8)) {
2070                         /* XXX - Need to test on x8/x16 in parallel. */
2071                         info->portwidth >>= 1;
2072                 }
2073
2074                 flash_write_cmd (info, 0, 0, info->cmd_reset);
2075         }
2076
2077         return (info->size);
2078 }
2079
2080 #ifdef CONFIG_FLASH_CFI_MTD
2081 void flash_set_verbose(uint v)
2082 {
2083         flash_verbose = v;
2084 }
2085 #endif
2086
2087 static void cfi_flash_set_config_reg(u32 base, u16 val)
2088 {
2089 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
2090         /*
2091          * Only set this config register if really defined
2092          * to a valid value (0xffff is invalid)
2093          */
2094         if (val == 0xffff)
2095                 return;
2096
2097         /*
2098          * Set configuration register. Data is "encrypted" in the 16 lower
2099          * address bits.
2100          */
2101         flash_write16(FLASH_CMD_SETUP, (void *)(base + (val << 1)));
2102         flash_write16(FLASH_CMD_SET_CR_CONFIRM, (void *)(base + (val << 1)));
2103
2104         /*
2105          * Finally issue reset-command to bring device back to
2106          * read-array mode
2107          */
2108         flash_write16(FLASH_CMD_RESET, (void *)base);
2109 #endif
2110 }
2111
2112 /*-----------------------------------------------------------------------
2113  */
2114
2115 void flash_protect_default(void)
2116 {
2117 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2118         int i;
2119         struct apl_s {
2120                 ulong start;
2121                 ulong size;
2122         } apl[] = CONFIG_SYS_FLASH_AUTOPROTECT_LIST;
2123 #endif
2124
2125         /* Monitor protection ON by default */
2126 #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) && \
2127         (!defined(CONFIG_MONITOR_IS_IN_RAM))
2128         flash_protect(FLAG_PROTECT_SET,
2129                        CONFIG_SYS_MONITOR_BASE,
2130                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len  - 1,
2131                        flash_get_info(CONFIG_SYS_MONITOR_BASE));
2132 #endif
2133
2134         /* Environment protection ON by default */
2135 #ifdef CONFIG_ENV_IS_IN_FLASH
2136         flash_protect(FLAG_PROTECT_SET,
2137                        CONFIG_ENV_ADDR,
2138                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
2139                        flash_get_info(CONFIG_ENV_ADDR));
2140 #endif
2141
2142         /* Redundant environment protection ON by default */
2143 #ifdef CONFIG_ENV_ADDR_REDUND
2144         flash_protect(FLAG_PROTECT_SET,
2145                        CONFIG_ENV_ADDR_REDUND,
2146                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
2147                        flash_get_info(CONFIG_ENV_ADDR_REDUND));
2148 #endif
2149
2150 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2151         for (i = 0; i < (sizeof(apl) / sizeof(struct apl_s)); i++) {
2152                 debug("autoprotecting from %08lx to %08lx\n",
2153                       apl[i].start, apl[i].start + apl[i].size - 1);
2154                 flash_protect(FLAG_PROTECT_SET,
2155                                apl[i].start,
2156                                apl[i].start + apl[i].size - 1,
2157                                flash_get_info(apl[i].start));
2158         }
2159 #endif
2160 }
2161
2162 unsigned long flash_init (void)
2163 {
2164         unsigned long size = 0;
2165         int i;
2166
2167 #ifdef CONFIG_SYS_FLASH_PROTECTION
2168         /* read environment from EEPROM */
2169         char s[64];
2170         getenv_f("unlock", s, sizeof(s));
2171 #endif
2172
2173         /* Init: no FLASHes known */
2174         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
2175                 flash_info[i].flash_id = FLASH_UNKNOWN;
2176
2177                 /* Optionally write flash configuration register */
2178                 cfi_flash_set_config_reg(cfi_flash_bank_addr(i),
2179                                          cfi_flash_config_reg(i));
2180
2181                 if (!flash_detect_legacy(cfi_flash_bank_addr(i), i))
2182                         flash_get_size(cfi_flash_bank_addr(i), i);
2183                 size += flash_info[i].size;
2184                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
2185 #ifndef CONFIG_SYS_FLASH_QUIET_TEST
2186                         printf ("## Unknown flash on Bank %d "
2187                                 "- Size = 0x%08lx = %ld MB\n",
2188                                 i+1, flash_info[i].size,
2189                                 flash_info[i].size >> 20);
2190 #endif /* CONFIG_SYS_FLASH_QUIET_TEST */
2191                 }
2192 #ifdef CONFIG_SYS_FLASH_PROTECTION
2193                 else if ((s != NULL) && (strcmp(s, "yes") == 0)) {
2194                         /*
2195                          * Only the U-Boot image and it's environment
2196                          * is protected, all other sectors are
2197                          * unprotected (unlocked) if flash hardware
2198                          * protection is used (CONFIG_SYS_FLASH_PROTECTION)
2199                          * and the environment variable "unlock" is
2200                          * set to "yes".
2201                          */
2202                         if (flash_info[i].legacy_unlock) {
2203                                 int k;
2204
2205                                 /*
2206                                  * Disable legacy_unlock temporarily,
2207                                  * since flash_real_protect would
2208                                  * relock all other sectors again
2209                                  * otherwise.
2210                                  */
2211                                 flash_info[i].legacy_unlock = 0;
2212
2213                                 /*
2214                                  * Legacy unlocking (e.g. Intel J3) ->
2215                                  * unlock only one sector. This will
2216                                  * unlock all sectors.
2217                                  */
2218                                 flash_real_protect (&flash_info[i], 0, 0);
2219
2220                                 flash_info[i].legacy_unlock = 1;
2221
2222                                 /*
2223                                  * Manually mark other sectors as
2224                                  * unlocked (unprotected)
2225                                  */
2226                                 for (k = 1; k < flash_info[i].sector_count; k++)
2227                                         flash_info[i].protect[k] = 0;
2228                         } else {
2229                                 /*
2230                                  * No legancy unlocking -> unlock all sectors
2231                                  */
2232                                 flash_protect (FLAG_PROTECT_CLEAR,
2233                                                flash_info[i].start[0],
2234                                                flash_info[i].start[0]
2235                                                + flash_info[i].size - 1,
2236                                                &flash_info[i]);
2237                         }
2238                 }
2239 #endif /* CONFIG_SYS_FLASH_PROTECTION */
2240         }
2241
2242         flash_protect_default();
2243 #ifdef CONFIG_FLASH_CFI_MTD
2244         cfi_mtd_init();
2245 #endif
2246
2247         return (size);
2248 }