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  * SPDX-License-Identifier:     GPL-2.0+
  15  */
  16
  17 /* The DEBUG define must be before common to enable debugging */
  18 /* #define DEBUG        */
  19
  20 #include <common.h>
  21 #include <console.h>
  22 #include <dm.h>
  23 #include <errno.h>
  24 #include <fdt_support.h>
  25 #include <asm/processor.h>
  26 #include <asm/io.h>
  27 #include <asm/byteorder.h>
  28 #include <asm/unaligned.h>
  29 #include <environment.h>
  30 #include <mtd/cfi_flash.h>
  31 #include <watchdog.h>
  32
  33 /*
  34  * This file implements a Common Flash Interface (CFI) driver for
  35  * U-Boot.
  36  *
  37  * The width of the port and the width of the chips are determined at
  38  * initialization.  These widths are used to calculate the address for
  39  * access CFI data structures.
  40  *
  41  * References
  42  * JEDEC Standard JESD68 - Common Flash Interface (CFI)
  43  * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
  44  * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
  45  * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
  46  * AMD CFI Specification, Release 2.0 December 1, 2001
  47  * AMD/Spansion Application Note: Migration from Single-byte to Three-byte
  48  *   Device IDs, Publication Number 25538 Revision A, November 8, 2001
  49  *
  50  * Define CONFIG_SYS_WRITE_SWAPPED_DATA, if you have to swap the Bytes between
  51  * reading and writing ... (yes there is such a Hardware).
  52  */
  53
  54 DECLARE_GLOBAL_DATA_PTR;
  55
  56 static uint flash_offset_cfi[2] = { FLASH_OFFSET_CFI, FLASH_OFFSET_CFI_ALT };
  57 #ifdef CONFIG_FLASH_CFI_MTD
  58 static uint flash_verbose = 1;
  59 #else
  60 #define flash_verbose 1
  61 #endif
  62
  63 flash_info_t flash_info[CFI_MAX_FLASH_BANKS];   /* FLASH chips info */
  64
  65 /*
  66  * Check if chip width is defined. If not, start detecting with 8bit.
  67  */
  68 #ifndef CONFIG_SYS_FLASH_CFI_WIDTH
  69 #define CONFIG_SYS_FLASH_CFI_WIDTH      FLASH_CFI_8BIT
  70 #endif
  71
  72 #ifdef CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS
  73 #define __maybe_weak __weak
  74 #else
  75 #define __maybe_weak static
  76 #endif
  77
  78 /*
  79  * 0xffff is an undefined value for the configuration register. When
  80  * this value is returned, the configuration register shall not be
  81  * written at all (default mode).
  82  */
  83 static u16 cfi_flash_config_reg(int i)
  84 {
  85 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
  86         return ((u16 [])CONFIG_SYS_CFI_FLASH_CONFIG_REGS)[i];
  87 #else
  88         return 0xffff;
  89 #endif
  90 }
  91
  92 #if defined(CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
  93 int cfi_flash_num_flash_banks = CONFIG_SYS_MAX_FLASH_BANKS_DETECT;
  94 #endif
  95
  96 #ifdef CONFIG_CFI_FLASH /* for driver model */
  97 static void cfi_flash_init_dm(void)
  98 {
  99         struct udevice *dev;
 100
 101         cfi_flash_num_flash_banks = 0;
 102         /*
 103          * The uclass_first_device() will probe the first device and
 104          * uclass_next_device() will probe the rest if they exist. So
 105          * that cfi_flash_probe() will get called assigning the base
 106          * addresses that are available.
 107          */
 108         for (uclass_first_device(UCLASS_MTD, &dev);
 109              dev;
 110              uclass_next_device(&dev)) {
 111         }
 112 }
 113
 114 phys_addr_t cfi_flash_bank_addr(int i)
 115 {
 116         return flash_info[i].base;
 117 }
 118 #else
 119 __weak phys_addr_t cfi_flash_bank_addr(int i)
 120 {
 121         return ((phys_addr_t [])CONFIG_SYS_FLASH_BANKS_LIST)[i];
 122 }
 123 #endif
 124
 125 __weak unsigned long cfi_flash_bank_size(int i)
 126 {
 127 #ifdef CONFIG_SYS_FLASH_BANKS_SIZES
 128         return ((unsigned long [])CONFIG_SYS_FLASH_BANKS_SIZES)[i];
 129 #else
 130         return 0;
 131 #endif
 132 }
 133
 134 __maybe_weak void flash_write8(u8 value, void *addr)
 135 {
 136         __raw_writeb(value, addr);
 137 }
 138
 139 __maybe_weak void flash_write16(u16 value, void *addr)
 140 {
 141         __raw_writew(value, addr);
 142 }
 143
 144 __maybe_weak void flash_write32(u32 value, void *addr)
 145 {
 146         __raw_writel(value, addr);
 147 }
 148
 149 __maybe_weak void flash_write64(u64 value, void *addr)
 150 {
 151         /* No architectures currently implement __raw_writeq() */
 152         *(volatile u64 *)addr = value;
 153 }
 154
 155 __maybe_weak u8 flash_read8(void *addr)
 156 {
 157         return __raw_readb(addr);
 158 }
 159
 160 __maybe_weak u16 flash_read16(void *addr)
 161 {
 162         return __raw_readw(addr);
 163 }
 164
 165 __maybe_weak u32 flash_read32(void *addr)
 166 {
 167         return __raw_readl(addr);
 168 }
 169
 170 __maybe_weak u64 flash_read64(void *addr)
 171 {
 172         /* No architectures currently implement __raw_readq() */
 173         return *(volatile u64 *)addr;
 174 }
 175
 176 /*-----------------------------------------------------------------------
 177  */
 178 #if defined(CONFIG_ENV_IS_IN_FLASH) || defined(CONFIG_ENV_ADDR_REDUND) || (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
 179 static flash_info_t *flash_get_info(ulong base)
 180 {
 181         int i;
 182         flash_info_t *info;
 183
 184         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 185                 info = &flash_info[i];
 186                 if (info->size && info->start[0] <= base &&
 187                     base <= info->start[0] + info->size - 1)
 188                         return info;
 189         }
 190
 191         return NULL;
 192 }
 193 #endif
 194
 195 unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect)
 196 {
 197         if (sect != (info->sector_count - 1))
 198                 return info->start[sect + 1] - info->start[sect];
 199         else
 200                 return info->start[0] + info->size - info->start[sect];
 201 }
 202
 203 /*-----------------------------------------------------------------------
 204  * create an address based on the offset and the port width
 205  */
 206 static inline void *
 207 flash_map(flash_info_t *info, flash_sect_t sect, uint offset)
 208 {
 209         unsigned int byte_offset = offset * info->portwidth;
 210
 211         return (void *)(info->start[sect] + byte_offset);
 212 }
 213
 214 static inline void flash_unmap(flash_info_t *info, flash_sect_t sect,
 215                 unsigned int offset, void *addr)
 216 {
 217 }
 218
 219 /*-----------------------------------------------------------------------
 220  * make a proper sized command based on the port and chip widths
 221  */
 222 static void flash_make_cmd(flash_info_t *info, u32 cmd, void *cmdbuf)
 223 {
 224         int i;
 225         int cword_offset;
 226         int cp_offset;
 227 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 228         u32 cmd_le = cpu_to_le32(cmd);
 229 #endif
 230         uchar val;
 231         uchar *cp = (uchar *) cmdbuf;
 232
 233         for (i = info->portwidth; i > 0; i--) {
 234                 cword_offset = (info->portwidth - i) % info->chipwidth;
 235 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 236                 cp_offset = info->portwidth - i;
 237                 val = *((uchar *)&cmd_le + cword_offset);
 238 #else
 239                 cp_offset = i - 1;
 240                 val = *((uchar *)&cmd + sizeof(u32) - cword_offset - 1);
 241 #endif
 242                 cp[cp_offset] = (cword_offset >= sizeof(u32)) ? 0x00 : val;
 243         }
 244 }
 245
 246 #ifdef DEBUG
 247 /*-----------------------------------------------------------------------
 248  * Debug support
 249  */
 250 static void print_longlong(char *str, unsigned long long data)
 251 {
 252         int i;
 253         char *cp;
 254
 255         cp = (char *)&data;
 256         for (i = 0; i < 8; i++)
 257                 sprintf(&str[i * 2], "%2.2x", *cp++);
 258 }
 259
 260 static void flash_printqry(struct cfi_qry *qry)
 261 {
 262         u8 *p = (u8 *)qry;
 263         int x, y;
 264
 265         for (x = 0; x < sizeof(struct cfi_qry); x += 16) {
 266                 debug("%02x : ", x);
 267                 for (y = 0; y < 16; y++)
 268                         debug("%2.2x ", p[x + y]);
 269                 debug(" ");
 270                 for (y = 0; y < 16; y++) {
 271                         unsigned char c = p[x + y];
 272
 273                         if (c >= 0x20 && c <= 0x7e)
 274                                 debug("%c", c);
 275                         else
 276                                 debug(".");
 277                 }
 278                 debug("\n");
 279         }
 280 }
 281 #endif
 282
 283 /*-----------------------------------------------------------------------
 284  * read a character at a port width address
 285  */
 286 static inline uchar flash_read_uchar(flash_info_t *info, uint offset)
 287 {
 288         uchar *cp;
 289         uchar retval;
 290
 291         cp = flash_map(info, 0, offset);
 292 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 293         retval = flash_read8(cp);
 294 #else
 295         retval = flash_read8(cp + info->portwidth - 1);
 296 #endif
 297         flash_unmap(info, 0, offset, cp);
 298         return retval;
 299 }
 300
 301 /*-----------------------------------------------------------------------
 302  * read a word at a port width address, assume 16bit bus
 303  */
 304 static inline ushort flash_read_word(flash_info_t *info, uint offset)
 305 {
 306         ushort *addr, retval;
 307
 308         addr = flash_map(info, 0, offset);
 309         retval = flash_read16(addr);
 310         flash_unmap(info, 0, offset, addr);
 311         return retval;
 312 }
 313
 314 /*-----------------------------------------------------------------------
 315  * read a long word by picking the least significant byte of each maximum
 316  * port size word. Swap for ppc format.
 317  */
 318 static ulong flash_read_long (flash_info_t *info, flash_sect_t sect,
 319                               uint offset)
 320 {
 321         uchar *addr;
 322         ulong retval;
 323
 324 #ifdef DEBUG
 325         int x;
 326 #endif
 327         addr = flash_map(info, sect, offset);
 328
 329 #ifdef DEBUG
 330         debug("long addr is at %p info->portwidth = %d\n", addr,
 331                info->portwidth);
 332         for (x = 0; x < 4 * info->portwidth; x++)
 333                 debug("addr[%x] = 0x%x\n", x, flash_read8(addr + x));
 334 #endif
 335 #if defined(__LITTLE_ENDIAN) || defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 336         retval = ((flash_read8(addr) << 16) |
 337                   (flash_read8(addr + info->portwidth) << 24) |
 338                   (flash_read8(addr + 2 * info->portwidth)) |
 339                   (flash_read8(addr + 3 * info->portwidth) << 8));
 340 #else
 341         retval = ((flash_read8(addr + 2 * info->portwidth - 1) << 24) |
 342                   (flash_read8(addr + info->portwidth - 1) << 16) |
 343                   (flash_read8(addr + 4 * info->portwidth - 1) << 8) |
 344                   (flash_read8(addr + 3 * info->portwidth - 1)));
 345 #endif
 346         flash_unmap(info, sect, offset, addr);
 347
 348         return retval;
 349 }
 350
 351 /*
 352  * Write a proper sized command to the correct address
 353  */
 354 static void flash_write_cmd(flash_info_t *info, flash_sect_t sect,
 355                             uint offset, u32 cmd)
 356 {
 357         void *addr;
 358         cfiword_t cword;
 359
 360         addr = flash_map(info, sect, offset);
 361         flash_make_cmd(info, cmd, &cword);
 362         switch (info->portwidth) {
 363         case FLASH_CFI_8BIT:
 364                 debug("fwc addr %p cmd %x %x 8bit x %d bit\n", addr, cmd,
 365                        cword.w8, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 366                 flash_write8(cword.w8, addr);
 367                 break;
 368         case FLASH_CFI_16BIT:
 369                 debug("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr,
 370                        cmd, cword.w16,
 371                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 372                 flash_write16(cword.w16, addr);
 373                 break;
 374         case FLASH_CFI_32BIT:
 375                 debug("fwc addr %p cmd %x %8.8x 32bit x %d bit\n", addr,
 376                        cmd, cword.w32,
 377                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 378                 flash_write32(cword.w32, addr);
 379                 break;
 380         case FLASH_CFI_64BIT:
 381 #ifdef DEBUG
 382                 {
 383                         char str[20];
 384
 385                         print_longlong(str, cword.w64);
 386
 387                         debug("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
 388                                addr, cmd, str,
 389                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
 390                 }
 391 #endif
 392                 flash_write64(cword.w64, addr);
 393                 break;
 394         }
 395
 396         /* Ensure all the instructions are fully finished */
 397         sync();
 398
 399         flash_unmap(info, sect, offset, addr);
 400 }
 401
 402 static void flash_unlock_seq(flash_info_t *info, flash_sect_t sect)
 403 {
 404         flash_write_cmd(info, sect, info->addr_unlock1, AMD_CMD_UNLOCK_START);
 405         flash_write_cmd(info, sect, info->addr_unlock2, AMD_CMD_UNLOCK_ACK);
 406 }
 407
 408 /*-----------------------------------------------------------------------
 409  */
 410 static int flash_isequal(flash_info_t *info, flash_sect_t sect,
 411                           uint offset, uchar cmd)
 412 {
 413         void *addr;
 414         cfiword_t cword;
 415         int retval;
 416
 417         addr = flash_map(info, sect, offset);
 418         flash_make_cmd(info, cmd, &cword);
 419
 420         debug("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
 421         switch (info->portwidth) {
 422         case FLASH_CFI_8BIT:
 423                 debug("is= %x %x\n", flash_read8(addr), cword.w8);
 424                 retval = (flash_read8(addr) == cword.w8);
 425                 break;
 426         case FLASH_CFI_16BIT:
 427                 debug("is= %4.4x %4.4x\n", flash_read16(addr), cword.w16);
 428                 retval = (flash_read16(addr) == cword.w16);
 429                 break;
 430         case FLASH_CFI_32BIT:
 431                 debug("is= %8.8x %8.8x\n", flash_read32(addr), cword.w32);
 432                 retval = (flash_read32(addr) == cword.w32);
 433                 break;
 434         case FLASH_CFI_64BIT:
 435 #ifdef DEBUG
 436                 {
 437                         char str1[20];
 438                         char str2[20];
 439
 440                         print_longlong(str1, flash_read64(addr));
 441                         print_longlong(str2, cword.w64);
 442                         debug("is= %s %s\n", str1, str2);
 443                 }
 444 #endif
 445                 retval = (flash_read64(addr) == cword.w64);
 446                 break;
 447         default:
 448                 retval = 0;
 449                 break;
 450         }
 451         flash_unmap(info, sect, offset, addr);
 452
 453         return retval;
 454 }
 455
 456 /*-----------------------------------------------------------------------
 457  */
 458 static int flash_isset(flash_info_t *info, flash_sect_t sect,
 459                         uint offset, uchar cmd)
 460 {
 461         void *addr;
 462         cfiword_t cword;
 463         int retval;
 464
 465         addr = flash_map(info, sect, offset);
 466         flash_make_cmd(info, cmd, &cword);
 467         switch (info->portwidth) {
 468         case FLASH_CFI_8BIT:
 469                 retval = ((flash_read8(addr) & cword.w8) == cword.w8);
 470                 break;
 471         case FLASH_CFI_16BIT:
 472                 retval = ((flash_read16(addr) & cword.w16) == cword.w16);
 473                 break;
 474         case FLASH_CFI_32BIT:
 475                 retval = ((flash_read32(addr) & cword.w32) == cword.w32);
 476                 break;
 477         case FLASH_CFI_64BIT:
 478                 retval = ((flash_read64(addr) & cword.w64) == cword.w64);
 479                 break;
 480         default:
 481                 retval = 0;
 482                 break;
 483         }
 484         flash_unmap(info, sect, offset, addr);
 485
 486         return retval;
 487 }
 488
 489 /*-----------------------------------------------------------------------
 490  */
 491 static int flash_toggle(flash_info_t *info, flash_sect_t sect,
 492                          uint offset, uchar cmd)
 493 {
 494         void *addr;
 495         cfiword_t cword;
 496         int retval;
 497
 498         addr = flash_map(info, sect, offset);
 499         flash_make_cmd(info, cmd, &cword);
 500         switch (info->portwidth) {
 501         case FLASH_CFI_8BIT:
 502                 retval = flash_read8(addr) != flash_read8(addr);
 503                 break;
 504         case FLASH_CFI_16BIT:
 505                 retval = flash_read16(addr) != flash_read16(addr);
 506                 break;
 507         case FLASH_CFI_32BIT:
 508                 retval = flash_read32(addr) != flash_read32(addr);
 509                 break;
 510         case FLASH_CFI_64BIT:
 511                 retval = ((flash_read32(addr) != flash_read32(addr)) ||
 512                            (flash_read32(addr + 4) != flash_read32(addr + 4)));
 513                 break;
 514         default:
 515                 retval = 0;
 516                 break;
 517         }
 518         flash_unmap(info, sect, offset, addr);
 519
 520         return retval;
 521 }
 522
 523 /*
 524  * flash_is_busy - check to see if the flash is busy
 525  *
 526  * This routine checks the status of the chip and returns true if the
 527  * chip is busy.
 528  */
 529 static int flash_is_busy(flash_info_t *info, flash_sect_t sect)
 530 {
 531         int retval;
 532
 533         switch (info->vendor) {
 534         case CFI_CMDSET_INTEL_PROG_REGIONS:
 535         case CFI_CMDSET_INTEL_STANDARD:
 536         case CFI_CMDSET_INTEL_EXTENDED:
 537                 retval = !flash_isset(info, sect, 0, FLASH_STATUS_DONE);
 538                 break;
 539         case CFI_CMDSET_AMD_STANDARD:
 540         case CFI_CMDSET_AMD_EXTENDED:
 541 #ifdef CONFIG_FLASH_CFI_LEGACY
 542         case CFI_CMDSET_AMD_LEGACY:
 543 #endif
 544                 if (info->sr_supported) {
 545                         flash_write_cmd(info, sect, info->addr_unlock1,
 546                                          FLASH_CMD_READ_STATUS);
 547                         retval = !flash_isset(info, sect, 0,
 548                                                FLASH_STATUS_DONE);
 549                 } else {
 550                         retval = flash_toggle(info, sect, 0,
 551                                                AMD_STATUS_TOGGLE);
 552                 }
 553
 554                 break;
 555         default:
 556                 retval = 0;
 557         }
 558         debug("%s: %d\n", __func__, retval);
 559         return retval;
 560 }
 561
 562 /*-----------------------------------------------------------------------
 563  *  wait for XSR.7 to be set. Time out with an error if it does not.
 564  *  This routine does not set the flash to read-array mode.
 565  */
 566 static int flash_status_check(flash_info_t *info, flash_sect_t sector,
 567                                ulong tout, char *prompt)
 568 {
 569         ulong start;
 570
 571 #if CONFIG_SYS_HZ != 1000
 572         if ((ulong)CONFIG_SYS_HZ > 100000)
 573                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 574         else
 575                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 576 #endif
 577
 578         /* Wait for command completion */
 579 #ifdef CONFIG_SYS_LOW_RES_TIMER
 580         reset_timer();
 581 #endif
 582         start = get_timer(0);
 583         WATCHDOG_RESET();
 584         while (flash_is_busy(info, sector)) {
 585                 if (get_timer(start) > tout) {
 586                         printf("Flash %s timeout at address %lx data %lx\n",
 587                                 prompt, info->start[sector],
 588                                 flash_read_long(info, sector, 0));
 589                         flash_write_cmd(info, sector, 0, info->cmd_reset);
 590                         udelay(1);
 591                         return ERR_TIMOUT;
 592                 }
 593                 udelay(1);              /* also triggers watchdog */
 594         }
 595         return ERR_OK;
 596 }
 597
 598 /*-----------------------------------------------------------------------
 599  * Wait for XSR.7 to be set, if it times out print an error, otherwise
 600  * do a full status check.
 601  *
 602  * This routine sets the flash to read-array mode.
 603  */
 604 static int flash_full_status_check(flash_info_t *info, flash_sect_t sector,
 605                                     ulong tout, char *prompt)
 606 {
 607         int retcode;
 608
 609         retcode = flash_status_check(info, sector, tout, prompt);
 610         switch (info->vendor) {
 611         case CFI_CMDSET_INTEL_PROG_REGIONS:
 612         case CFI_CMDSET_INTEL_EXTENDED:
 613         case CFI_CMDSET_INTEL_STANDARD:
 614                 if (retcode == ERR_OK &&
 615                         !flash_isset(info, sector, 0, FLASH_STATUS_DONE)) {
 616                         retcode = ERR_INVAL;
 617                         printf("Flash %s error at address %lx\n", prompt,
 618                                 info->start[sector]);
 619                         if (flash_isset(info, sector, 0, FLASH_STATUS_ECLBS |
 620                                          FLASH_STATUS_PSLBS)) {
 621                                 puts("Command Sequence Error.\n");
 622                         } else if (flash_isset(info, sector, 0,
 623                                                 FLASH_STATUS_ECLBS)) {
 624                                 puts("Block Erase Error.\n");
 625                                 retcode = ERR_NOT_ERASED;
 626                         } else if (flash_isset(info, sector, 0,
 627                                                 FLASH_STATUS_PSLBS)) {
 628                                 puts("Locking Error\n");
 629                         }
 630                         if (flash_isset(info, sector, 0, FLASH_STATUS_DPS)) {
 631                                 puts("Block locked.\n");
 632                                 retcode = ERR_PROTECTED;
 633                         }
 634                         if (flash_isset(info, sector, 0, FLASH_STATUS_VPENS))
 635                                 puts("Vpp Low Error.\n");
 636                 }
 637                 flash_write_cmd(info, sector, 0, info->cmd_reset);
 638                 udelay(1);
 639                 break;
 640         default:
 641                 break;
 642         }
 643         return retcode;
 644 }
 645
 646 static int use_flash_status_poll(flash_info_t *info)
 647 {
 648 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 649         if (info->vendor == CFI_CMDSET_AMD_EXTENDED ||
 650             info->vendor == CFI_CMDSET_AMD_STANDARD)
 651                 return 1;
 652 #endif
 653         return 0;
 654 }
 655
 656 static int flash_status_poll(flash_info_t *info, void *src, void *dst,
 657                              ulong tout, char *prompt)
 658 {
 659 #ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
 660         ulong start;
 661         int ready;
 662
 663 #if CONFIG_SYS_HZ != 1000
 664         if ((ulong)CONFIG_SYS_HZ > 100000)
 665                 tout *= (ulong)CONFIG_SYS_HZ / 1000;  /* for a big HZ, avoid overflow */
 666         else
 667                 tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
 668 #endif
 669
 670         /* Wait for command completion */
 671 #ifdef CONFIG_SYS_LOW_RES_TIMER
 672         reset_timer();
 673 #endif
 674         start = get_timer(0);
 675         WATCHDOG_RESET();
 676         while (1) {
 677                 switch (info->portwidth) {
 678                 case FLASH_CFI_8BIT:
 679                         ready = flash_read8(dst) == flash_read8(src);
 680                         break;
 681                 case FLASH_CFI_16BIT:
 682                         ready = flash_read16(dst) == flash_read16(src);
 683                         break;
 684                 case FLASH_CFI_32BIT:
 685                         ready = flash_read32(dst) == flash_read32(src);
 686                         break;
 687                 case FLASH_CFI_64BIT:
 688                         ready = flash_read64(dst) == flash_read64(src);
 689                         break;
 690                 default:
 691                         ready = 0;
 692                         break;
 693                 }
 694                 if (ready)
 695                         break;
 696                 if (get_timer(start) > tout) {
 697                         printf("Flash %s timeout at address %lx data %lx\n",
 698                                prompt, (ulong)dst, (ulong)flash_read8(dst));
 699                         return ERR_TIMOUT;
 700                 }
 701                 udelay(1);              /* also triggers watchdog */
 702         }
 703 #endif /* CONFIG_SYS_CFI_FLASH_STATUS_POLL */
 704         return ERR_OK;
 705 }
 706
 707 /*-----------------------------------------------------------------------
 708  */
 709 static void flash_add_byte(flash_info_t *info, cfiword_t *cword, uchar c)
 710 {
 711 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 712         unsigned short  w;
 713         unsigned int    l;
 714         unsigned long long ll;
 715 #endif
 716
 717         switch (info->portwidth) {
 718         case FLASH_CFI_8BIT:
 719                 cword->w8 = c;
 720                 break;
 721         case FLASH_CFI_16BIT:
 722 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 723                 w = c;
 724                 w <<= 8;
 725                 cword->w16 = (cword->w16 >> 8) | w;
 726 #else
 727                 cword->w16 = (cword->w16 << 8) | c;
 728 #endif
 729                 break;
 730         case FLASH_CFI_32BIT:
 731 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 732                 l = c;
 733                 l <<= 24;
 734                 cword->w32 = (cword->w32 >> 8) | l;
 735 #else
 736                 cword->w32 = (cword->w32 << 8) | c;
 737 #endif
 738                 break;
 739         case FLASH_CFI_64BIT:
 740 #if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
 741                 ll = c;
 742                 ll <<= 56;
 743                 cword->w64 = (cword->w64 >> 8) | ll;
 744 #else
 745                 cword->w64 = (cword->w64 << 8) | c;
 746 #endif
 747                 break;
 748         }
 749 }
 750
 751 /*
 752  * Loop through the sector table starting from the previously found sector.
 753  * Searches forwards or backwards, dependent on the passed address.
 754  */
 755 static flash_sect_t find_sector(flash_info_t *info, ulong addr)
 756 {
 757         static flash_sect_t saved_sector; /* previously found sector */
 758         static flash_info_t *saved_info; /* previously used flash bank */
 759         flash_sect_t sector = saved_sector;
 760
 761         if (info != saved_info || sector >= info->sector_count)
 762                 sector = 0;
 763
 764         while ((info->start[sector] < addr) &&
 765                 (sector < info->sector_count - 1))
 766                 sector++;
 767         while ((info->start[sector] > addr) && (sector > 0))
 768                 /*
 769                  * also decrements the sector in case of an overshot
 770                  * in the first loop
 771                  */
 772                 sector--;
 773
 774         saved_sector = sector;
 775         saved_info = info;
 776         return sector;
 777 }
 778
 779 /*-----------------------------------------------------------------------
 780  */
 781 static int flash_write_cfiword(flash_info_t *info, ulong dest,
 782                                 cfiword_t cword)
 783 {
 784         void *dstaddr = (void *)dest;
 785         int flag;
 786         flash_sect_t sect = 0;
 787         char sect_found = 0;
 788
 789         /* Check if Flash is (sufficiently) erased */
 790         switch (info->portwidth) {
 791         case FLASH_CFI_8BIT:
 792                 flag = ((flash_read8(dstaddr) & cword.w8) == cword.w8);
 793                 break;
 794         case FLASH_CFI_16BIT:
 795                 flag = ((flash_read16(dstaddr) & cword.w16) == cword.w16);
 796                 break;
 797         case FLASH_CFI_32BIT:
 798                 flag = ((flash_read32(dstaddr) & cword.w32) == cword.w32);
 799                 break;
 800         case FLASH_CFI_64BIT:
 801                 flag = ((flash_read64(dstaddr) & cword.w64) == cword.w64);
 802                 break;
 803         default:
 804                 flag = 0;
 805                 break;
 806         }
 807         if (!flag)
 808                 return ERR_NOT_ERASED;
 809
 810         /* Disable interrupts which might cause a timeout here */
 811         flag = disable_interrupts();
 812
 813         switch (info->vendor) {
 814         case CFI_CMDSET_INTEL_PROG_REGIONS:
 815         case CFI_CMDSET_INTEL_EXTENDED:
 816         case CFI_CMDSET_INTEL_STANDARD:
 817                 flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS);
 818                 flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE);
 819                 break;
 820         case CFI_CMDSET_AMD_EXTENDED:
 821         case CFI_CMDSET_AMD_STANDARD:
 822                 sect = find_sector(info, dest);
 823                 flash_unlock_seq(info, sect);
 824                 flash_write_cmd(info, sect, info->addr_unlock1, AMD_CMD_WRITE);
 825                 sect_found = 1;
 826                 break;
 827 #ifdef CONFIG_FLASH_CFI_LEGACY
 828         case CFI_CMDSET_AMD_LEGACY:
 829                 sect = find_sector(info, dest);
 830                 flash_unlock_seq(info, 0);
 831                 flash_write_cmd(info, 0, info->addr_unlock1, AMD_CMD_WRITE);
 832                 sect_found = 1;
 833                 break;
 834 #endif
 835         }
 836
 837         switch (info->portwidth) {
 838         case FLASH_CFI_8BIT:
 839                 flash_write8(cword.w8, dstaddr);
 840                 break;
 841         case FLASH_CFI_16BIT:
 842                 flash_write16(cword.w16, dstaddr);
 843                 break;
 844         case FLASH_CFI_32BIT:
 845                 flash_write32(cword.w32, dstaddr);
 846                 break;
 847         case FLASH_CFI_64BIT:
 848                 flash_write64(cword.w64, dstaddr);
 849                 break;
 850         }
 851
 852         /* re-enable interrupts if necessary */
 853         if (flag)
 854                 enable_interrupts();
 855
 856         if (!sect_found)
 857                 sect = find_sector(info, dest);
 858
 859         if (use_flash_status_poll(info))
 860                 return flash_status_poll(info, &cword, dstaddr,
 861                                          info->write_tout, "write");
 862         else
 863                 return flash_full_status_check(info, sect,
 864                                                info->write_tout, "write");
 865 }
 866
 867 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 868
 869 static int flash_write_cfibuffer(flash_info_t *info, ulong dest, uchar *cp,
 870                                   int len)
 871 {
 872         flash_sect_t sector;
 873         int cnt;
 874         int retcode;
 875         void *src = cp;
 876         void *dst = (void *)dest;
 877         void *dst2 = dst;
 878         int flag = 1;
 879         uint offset = 0;
 880         unsigned int shift;
 881         uchar write_cmd;
 882
 883         switch (info->portwidth) {
 884         case FLASH_CFI_8BIT:
 885                 shift = 0;
 886                 break;
 887         case FLASH_CFI_16BIT:
 888                 shift = 1;
 889                 break;
 890         case FLASH_CFI_32BIT:
 891                 shift = 2;
 892                 break;
 893         case FLASH_CFI_64BIT:
 894                 shift = 3;
 895                 break;
 896         default:
 897                 retcode = ERR_INVAL;
 898                 goto out_unmap;
 899         }
 900
 901         cnt = len >> shift;
 902
 903         while ((cnt-- > 0) && (flag == 1)) {
 904                 switch (info->portwidth) {
 905                 case FLASH_CFI_8BIT:
 906                         flag = ((flash_read8(dst2) & flash_read8(src)) ==
 907                                 flash_read8(src));
 908                         src += 1, dst2 += 1;
 909                         break;
 910                 case FLASH_CFI_16BIT:
 911                         flag = ((flash_read16(dst2) & flash_read16(src)) ==
 912                                 flash_read16(src));
 913                         src += 2, dst2 += 2;
 914                         break;
 915                 case FLASH_CFI_32BIT:
 916                         flag = ((flash_read32(dst2) & flash_read32(src)) ==
 917                                 flash_read32(src));
 918                         src += 4, dst2 += 4;
 919                         break;
 920                 case FLASH_CFI_64BIT:
 921                         flag = ((flash_read64(dst2) & flash_read64(src)) ==
 922                                 flash_read64(src));
 923                         src += 8, dst2 += 8;
 924                         break;
 925                 }
 926         }
 927         if (!flag) {
 928                 retcode = ERR_NOT_ERASED;
 929                 goto out_unmap;
 930         }
 931
 932         src = cp;
 933         sector = find_sector(info, dest);
 934
 935         switch (info->vendor) {
 936         case CFI_CMDSET_INTEL_PROG_REGIONS:
 937         case CFI_CMDSET_INTEL_STANDARD:
 938         case CFI_CMDSET_INTEL_EXTENDED:
 939                 write_cmd = (info->vendor == CFI_CMDSET_INTEL_PROG_REGIONS) ?
 940                                         FLASH_CMD_WRITE_BUFFER_PROG : FLASH_CMD_WRITE_TO_BUFFER;
 941                 flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
 942                 flash_write_cmd(info, sector, 0, FLASH_CMD_READ_STATUS);
 943                 flash_write_cmd(info, sector, 0, write_cmd);
 944                 retcode = flash_status_check(info, sector,
 945                                               info->buffer_write_tout,
 946                                               "write to buffer");
 947                 if (retcode == ERR_OK) {
 948                         /* reduce the number of loops by the width of
 949                          * the port
 950                          */
 951                         cnt = len >> shift;
 952                         flash_write_cmd(info, sector, 0, cnt - 1);
 953                         while (cnt-- > 0) {
 954                                 switch (info->portwidth) {
 955                                 case FLASH_CFI_8BIT:
 956                                         flash_write8(flash_read8(src), dst);
 957                                         src += 1, dst += 1;
 958                                         break;
 959                                 case FLASH_CFI_16BIT:
 960                                         flash_write16(flash_read16(src), dst);
 961                                         src += 2, dst += 2;
 962                                         break;
 963                                 case FLASH_CFI_32BIT:
 964                                         flash_write32(flash_read32(src), dst);
 965                                         src += 4, dst += 4;
 966                                         break;
 967                                 case FLASH_CFI_64BIT:
 968                                         flash_write64(flash_read64(src), dst);
 969                                         src += 8, dst += 8;
 970                                         break;
 971                                 default:
 972                                         retcode = ERR_INVAL;
 973                                         goto out_unmap;
 974                                 }
 975                         }
 976                         flash_write_cmd(info, sector, 0,
 977                                          FLASH_CMD_WRITE_BUFFER_CONFIRM);
 978                         retcode = flash_full_status_check(
 979                                 info, sector, info->buffer_write_tout,
 980                                 "buffer write");
 981                 }
 982
 983                 break;
 984
 985         case CFI_CMDSET_AMD_STANDARD:
 986         case CFI_CMDSET_AMD_EXTENDED:
 987                 flash_unlock_seq(info, sector);
 988
 989 #ifdef CONFIG_FLASH_SPANSION_S29WS_N
 990                 offset = ((unsigned long)dst - info->start[sector]) >> shift;
 991 #endif
 992                 flash_write_cmd(info, sector, offset, AMD_CMD_WRITE_TO_BUFFER);
 993                 cnt = len >> shift;
 994                 flash_write_cmd(info, sector, offset, cnt - 1);
 995
 996                 switch (info->portwidth) {
 997                 case FLASH_CFI_8BIT:
 998                         while (cnt-- > 0) {
 999                                 flash_write8(flash_read8(src), dst);
1000                                 src += 1, dst += 1;
1001                         }
1002                         break;
1003                 case FLASH_CFI_16BIT:
1004                         while (cnt-- > 0) {
1005                                 flash_write16(flash_read16(src), dst);
1006                                 src += 2, dst += 2;
1007                         }
1008                         break;
1009                 case FLASH_CFI_32BIT:
1010                         while (cnt-- > 0) {
1011                                 flash_write32(flash_read32(src), dst);
1012                                 src += 4, dst += 4;
1013                         }
1014                         break;
1015                 case FLASH_CFI_64BIT:
1016                         while (cnt-- > 0) {
1017                                 flash_write64(flash_read64(src), dst);
1018                                 src += 8, dst += 8;
1019                         }
1020                         break;
1021                 default:
1022                         retcode = ERR_INVAL;
1023                         goto out_unmap;
1024                 }
1025
1026                 flash_write_cmd(info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
1027                 if (use_flash_status_poll(info))
1028                         retcode = flash_status_poll(info, src - (1 << shift),
1029                                                     dst - (1 << shift),
1030                                                     info->buffer_write_tout,
1031                                                     "buffer write");
1032                 else
1033                         retcode = flash_full_status_check(info, sector,
1034                                                           info->buffer_write_tout,
1035                                                           "buffer write");
1036                 break;
1037
1038         default:
1039                 debug("Unknown Command Set\n");
1040                 retcode = ERR_INVAL;
1041                 break;
1042         }
1043
1044 out_unmap:
1045         return retcode;
1046 }
1047 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1048
1049 /*-----------------------------------------------------------------------
1050  */
1051 int flash_erase(flash_info_t *info, int s_first, int s_last)
1052 {
1053         int rcode = 0;
1054         int prot;
1055         flash_sect_t sect;
1056         int st;
1057
1058         if (info->flash_id != FLASH_MAN_CFI) {
1059                 puts("Can't erase unknown flash type - aborted\n");
1060                 return 1;
1061         }
1062         if (s_first < 0 || s_first > s_last) {
1063                 puts("- no sectors to erase\n");
1064                 return 1;
1065         }
1066
1067         prot = 0;
1068         for (sect = s_first; sect <= s_last; ++sect)
1069                 if (info->protect[sect])
1070                         prot++;
1071         if (prot) {
1072                 printf("- Warning: %d protected sectors will not be erased!\n",
1073                         prot);
1074         } else if (flash_verbose) {
1075                 putc('\n');
1076         }
1077
1078         for (sect = s_first; sect <= s_last; sect++) {
1079                 if (ctrlc()) {
1080                         printf("\n");
1081                         return 1;
1082                 }
1083
1084                 if (info->protect[sect] == 0) { /* not protected */
1085 #ifdef CONFIG_SYS_FLASH_CHECK_BLANK_BEFORE_ERASE
1086                         int k;
1087                         int size;
1088                         int erased;
1089                         u32 *flash;
1090
1091                         /*
1092                          * Check if whole sector is erased
1093                          */
1094                         size = flash_sector_size(info, sect);
1095                         erased = 1;
1096                         flash = (u32 *)info->start[sect];
1097                         /* divide by 4 for longword access */
1098                         size = size >> 2;
1099                         for (k = 0; k < size; k++) {
1100                                 if (flash_read32(flash++) != 0xffffffff) {
1101                                         erased = 0;
1102                                         break;
1103                                 }
1104                         }
1105                         if (erased) {
1106                                 if (flash_verbose)
1107                                         putc(',');
1108                                 continue;
1109                         }
1110 #endif
1111                         switch (info->vendor) {
1112                         case CFI_CMDSET_INTEL_PROG_REGIONS:
1113                         case CFI_CMDSET_INTEL_STANDARD:
1114                         case CFI_CMDSET_INTEL_EXTENDED:
1115                                 flash_write_cmd(info, sect, 0,
1116                                                  FLASH_CMD_CLEAR_STATUS);
1117                                 flash_write_cmd(info, sect, 0,
1118                                                  FLASH_CMD_BLOCK_ERASE);
1119                                 flash_write_cmd(info, sect, 0,
1120                                                  FLASH_CMD_ERASE_CONFIRM);
1121                                 break;
1122                         case CFI_CMDSET_AMD_STANDARD:
1123                         case CFI_CMDSET_AMD_EXTENDED:
1124                                 flash_unlock_seq(info, sect);
1125                                 flash_write_cmd(info, sect,
1126                                                 info->addr_unlock1,
1127                                                 AMD_CMD_ERASE_START);
1128                                 flash_unlock_seq(info, sect);
1129                                 flash_write_cmd(info, sect, 0,
1130                                                  info->cmd_erase_sector);
1131                                 break;
1132 #ifdef CONFIG_FLASH_CFI_LEGACY
1133                         case CFI_CMDSET_AMD_LEGACY:
1134                                 flash_unlock_seq(info, 0);
1135                                 flash_write_cmd(info, 0, info->addr_unlock1,
1136                                                 AMD_CMD_ERASE_START);
1137                                 flash_unlock_seq(info, 0);
1138                                 flash_write_cmd(info, sect, 0,
1139                                                 AMD_CMD_ERASE_SECTOR);
1140                                 break;
1141 #endif
1142                         default:
1143                                 debug("Unknown flash vendor %d\n",
1144                                        info->vendor);
1145                                 break;
1146                         }
1147
1148                         if (use_flash_status_poll(info)) {
1149                                 cfiword_t cword;
1150                                 void *dest;
1151
1152                                 cword.w64 = 0xffffffffffffffffULL;
1153                                 dest = flash_map(info, sect, 0);
1154                                 st = flash_status_poll(info, &cword, dest,
1155                                                        info->erase_blk_tout, "erase");
1156                                 flash_unmap(info, sect, 0, dest);
1157                         } else {
1158                                 st = flash_full_status_check(info, sect,
1159                                                              info->erase_blk_tout,
1160                                                              "erase");
1161                         }
1162
1163                         if (st)
1164                                 rcode = 1;
1165                         else if (flash_verbose)
1166                                 putc('.');
1167                 }
1168         }
1169
1170         if (flash_verbose)
1171                 puts(" done\n");
1172
1173         return rcode;
1174 }
1175
1176 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1177 static int sector_erased(flash_info_t *info, int i)
1178 {
1179         int k;
1180         int size;
1181         u32 *flash;
1182
1183         /*
1184          * Check if whole sector is erased
1185          */
1186         size = flash_sector_size(info, i);
1187         flash = (u32 *)info->start[i];
1188         /* divide by 4 for longword access */
1189         size = size >> 2;
1190
1191         for (k = 0; k < size; k++) {
1192                 if (flash_read32(flash++) != 0xffffffff)
1193                         return 0;       /* not erased */
1194         }
1195
1196         return 1;                       /* erased */
1197 }
1198 #endif /* CONFIG_SYS_FLASH_EMPTY_INFO */
1199
1200 void flash_print_info(flash_info_t *info)
1201 {
1202         int i;
1203
1204         if (info->flash_id != FLASH_MAN_CFI) {
1205                 puts("missing or unknown FLASH type\n");
1206                 return;
1207         }
1208
1209         printf("%s flash (%d x %d)",
1210                 info->name,
1211                 (info->portwidth << 3), (info->chipwidth << 3));
1212         if (info->size < 1024 * 1024)
1213                 printf("  Size: %ld kB in %d Sectors\n",
1214                         info->size >> 10, info->sector_count);
1215         else
1216                 printf("  Size: %ld MB in %d Sectors\n",
1217                         info->size >> 20, info->sector_count);
1218         printf("  ");
1219         switch (info->vendor) {
1220         case CFI_CMDSET_INTEL_PROG_REGIONS:
1221                 printf("Intel Prog Regions");
1222                 break;
1223         case CFI_CMDSET_INTEL_STANDARD:
1224                 printf("Intel Standard");
1225                 break;
1226         case CFI_CMDSET_INTEL_EXTENDED:
1227                 printf("Intel Extended");
1228                 break;
1229         case CFI_CMDSET_AMD_STANDARD:
1230                 printf("AMD Standard");
1231                 break;
1232         case CFI_CMDSET_AMD_EXTENDED:
1233                 printf("AMD Extended");
1234                 break;
1235 #ifdef CONFIG_FLASH_CFI_LEGACY
1236         case CFI_CMDSET_AMD_LEGACY:
1237                 printf("AMD Legacy");
1238                 break;
1239 #endif
1240         default:
1241                 printf("Unknown (%d)", info->vendor);
1242                 break;
1243         }
1244         printf(" command set, Manufacturer ID: 0x%02X, Device ID: 0x",
1245                 info->manufacturer_id);
1246         printf(info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1247                 info->device_id);
1248         if ((info->device_id & 0xff) == 0x7E) {
1249                 printf(info->chipwidth == FLASH_CFI_16BIT ? "%04X" : "%02X",
1250                 info->device_id2);
1251         }
1252         if (info->vendor == CFI_CMDSET_AMD_STANDARD && info->legacy_unlock)
1253                 printf("\n  Advanced Sector Protection (PPB) enabled");
1254         printf("\n  Erase timeout: %ld ms, write timeout: %ld ms\n",
1255                 info->erase_blk_tout,
1256                 info->write_tout);
1257         if (info->buffer_size > 1) {
1258                 printf("  Buffer write timeout: %ld ms, "
1259                         "buffer size: %d bytes\n",
1260                 info->buffer_write_tout,
1261                 info->buffer_size);
1262         }
1263
1264         puts("\n  Sector Start Addresses:");
1265         for (i = 0; i < info->sector_count; ++i) {
1266                 if (ctrlc())
1267                         break;
1268                 if ((i % 5) == 0)
1269                         putc('\n');
1270 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
1271                 /* print empty and read-only info */
1272                 printf("  %08lX %c %s ",
1273                         info->start[i],
1274                         sector_erased(info, i) ? 'E' : ' ',
1275                         info->protect[i] ? "RO" : "  ");
1276 #else   /* ! CONFIG_SYS_FLASH_EMPTY_INFO */
1277                 printf("  %08lX   %s ",
1278                         info->start[i],
1279                         info->protect[i] ? "RO" : "  ");
1280 #endif
1281         }
1282         putc('\n');
1283 }
1284
1285 /*-----------------------------------------------------------------------
1286  * This is used in a few places in write_buf() to show programming
1287  * progress.  Making it a function is nasty because it needs to do side
1288  * effect updates to digit and dots.  Repeated code is nasty too, so
1289  * we define it once here.
1290  */
1291 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1292 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub) \
1293         if (flash_verbose) { \
1294                 dots -= dots_sub; \
1295                 if (scale > 0 && dots <= 0) { \
1296                         if ((digit % 5) == 0) \
1297                                 printf("%d", digit / 5); \
1298                         else \
1299                                 putc('.'); \
1300                         digit--; \
1301                         dots += scale; \
1302                 } \
1303         }
1304 #else
1305 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub)
1306 #endif
1307
1308 /*-----------------------------------------------------------------------
1309  * Copy memory to flash, returns:
1310  * 0 - OK
1311  * 1 - write timeout
1312  * 2 - Flash not erased
1313  */
1314 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
1315 {
1316         ulong wp;
1317         uchar *p;
1318         int aln;
1319         cfiword_t cword;
1320         int i, rc;
1321 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1322         int buffered_size;
1323 #endif
1324 #ifdef CONFIG_FLASH_SHOW_PROGRESS
1325         int digit = CONFIG_FLASH_SHOW_PROGRESS;
1326         int scale = 0;
1327         int dots  = 0;
1328
1329         /*
1330          * Suppress if there are fewer than CONFIG_FLASH_SHOW_PROGRESS writes.
1331          */
1332         if (cnt >= CONFIG_FLASH_SHOW_PROGRESS) {
1333                 scale = (int)((cnt + CONFIG_FLASH_SHOW_PROGRESS - 1) /
1334                         CONFIG_FLASH_SHOW_PROGRESS);
1335         }
1336 #endif
1337
1338         /* get lower aligned address */
1339         wp = (addr & ~(info->portwidth - 1));
1340
1341         /* handle unaligned start */
1342         aln = addr - wp;
1343         if (aln != 0) {
1344                 cword.w32 = 0;
1345                 p = (uchar *)wp;
1346                 for (i = 0; i < aln; ++i)
1347                         flash_add_byte(info, &cword, flash_read8(p + i));
1348
1349                 for (; (i < info->portwidth) && (cnt > 0); i++) {
1350                         flash_add_byte(info, &cword, *src++);
1351                         cnt--;
1352                 }
1353                 for (; (cnt == 0) && (i < info->portwidth); ++i)
1354                         flash_add_byte(info, &cword, flash_read8(p + i));
1355
1356                 rc = flash_write_cfiword(info, wp, cword);
1357                 if (rc != 0)
1358                         return rc;
1359
1360                 wp += i;
1361                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1362         }
1363
1364         /* handle the aligned part */
1365 #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
1366         buffered_size = (info->portwidth / info->chipwidth);
1367         buffered_size *= info->buffer_size;
1368         while (cnt >= info->portwidth) {
1369                 /* prohibit buffer write when buffer_size is 1 */
1370                 if (info->buffer_size == 1) {
1371                         cword.w32 = 0;
1372                         for (i = 0; i < info->portwidth; i++)
1373                                 flash_add_byte(info, &cword, *src++);
1374                         rc = flash_write_cfiword(info, wp, cword);
1375                         if (rc != 0)
1376                                 return rc;
1377                         wp += info->portwidth;
1378                         cnt -= info->portwidth;
1379                         continue;
1380                 }
1381
1382                 /* write buffer until next buffered_size aligned boundary */
1383                 i = buffered_size - (wp % buffered_size);
1384                 if (i > cnt)
1385                         i = cnt;
1386                 rc = flash_write_cfibuffer(info, wp, src, i);
1387                 if (rc != ERR_OK)
1388                         return rc;
1389                 i -= i & (info->portwidth - 1);
1390                 wp += i;
1391                 src += i;
1392                 cnt -= i;
1393                 FLASH_SHOW_PROGRESS(scale, dots, digit, i);
1394                 /* Only check every once in a while */
1395                 if ((cnt & 0xFFFF) < buffered_size && ctrlc())
1396                         return ERR_ABORTED;
1397         }
1398 #else
1399         while (cnt >= info->portwidth) {
1400                 cword.w32 = 0;
1401                 for (i = 0; i < info->portwidth; i++)
1402                         flash_add_byte(info, &cword, *src++);
1403                 rc = flash_write_cfiword(info, wp, cword);
1404                 if (rc != 0)
1405                         return rc;
1406                 wp += info->portwidth;
1407                 cnt -= info->portwidth;
1408                 FLASH_SHOW_PROGRESS(scale, dots, digit, info->portwidth);
1409                 /* Only check every once in a while */
1410                 if ((cnt & 0xFFFF) < info->portwidth && ctrlc())
1411                         return ERR_ABORTED;
1412         }
1413 #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
1414
1415         if (cnt == 0)
1416                 return (0);
1417
1418         /*
1419          * handle unaligned tail bytes
1420          */
1421         cword.w32 = 0;
1422         p = (uchar *)wp;
1423         for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
1424                 flash_add_byte(info, &cword, *src++);
1425                 --cnt;
1426         }
1427         for (; i < info->portwidth; ++i)
1428                 flash_add_byte(info, &cword, flash_read8(p + i));
1429
1430         return flash_write_cfiword(info, wp, cword);
1431 }
1432
1433 static inline int manufact_match(flash_info_t *info, u32 manu)
1434 {
1435         return info->manufacturer_id == ((manu & FLASH_VENDMASK) >> 16);
1436 }
1437
1438 /*-----------------------------------------------------------------------
1439  */
1440 #ifdef CONFIG_SYS_FLASH_PROTECTION
1441
1442 static int cfi_protect_bugfix(flash_info_t *info, long sector, int prot)
1443 {
1444         if (manufact_match(info, INTEL_MANUFACT) &&
1445                 info->device_id == NUMONYX_256MBIT) {
1446                 /*
1447                  * see errata called
1448                  * "Numonyx Axcell P33/P30 Specification Update" :)
1449                  */
1450                 flash_write_cmd(info, sector, 0, FLASH_CMD_READ_ID);
1451                 if (!flash_isequal(info, sector, FLASH_OFFSET_PROTECT,
1452                                    prot)) {
1453                         /*
1454                          * cmd must come before FLASH_CMD_PROTECT + 20us
1455                          * Disable interrupts which might cause a timeout here.
1456                          */
1457                         int flag = disable_interrupts();
1458                         unsigned short cmd;
1459
1460                         if (prot)
1461                                 cmd = FLASH_CMD_PROTECT_SET;
1462                         else
1463                                 cmd = FLASH_CMD_PROTECT_CLEAR;
1464
1465                         flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT);
1466                         flash_write_cmd(info, sector, 0, cmd);
1467                         /* re-enable interrupts if necessary */
1468                         if (flag)
1469                                 enable_interrupts();
1470                 }
1471                 return 1;
1472         }
1473         return 0;
1474 }
1475
1476 int flash_real_protect(flash_info_t *info, long sector, int prot)
1477 {
1478         int retcode = 0;
1479
1480         switch (info->vendor) {
1481         case CFI_CMDSET_INTEL_PROG_REGIONS:
1482         case CFI_CMDSET_INTEL_STANDARD:
1483         case CFI_CMDSET_INTEL_EXTENDED:
1484                 if (!cfi_protect_bugfix(info, sector, prot)) {
1485                         flash_write_cmd(info, sector, 0,
1486                                  FLASH_CMD_CLEAR_STATUS);
1487                         flash_write_cmd(info, sector, 0,
1488                                 FLASH_CMD_PROTECT);
1489                         if (prot)
1490                                 flash_write_cmd(info, sector, 0,
1491                                         FLASH_CMD_PROTECT_SET);
1492                         else
1493                                 flash_write_cmd(info, sector, 0,
1494                                         FLASH_CMD_PROTECT_CLEAR);
1495                 }
1496                 break;
1497         case CFI_CMDSET_AMD_EXTENDED:
1498         case CFI_CMDSET_AMD_STANDARD:
1499                 /* U-Boot only checks the first byte */
1500                 if (manufact_match(info, ATM_MANUFACT)) {
1501                         if (prot) {
1502                                 flash_unlock_seq(info, 0);
1503                                 flash_write_cmd(info, 0,
1504                                                 info->addr_unlock1,
1505                                                 ATM_CMD_SOFTLOCK_START);
1506                                 flash_unlock_seq(info, 0);
1507                                 flash_write_cmd(info, sector, 0,
1508                                                 ATM_CMD_LOCK_SECT);
1509                         } else {
1510                                 flash_write_cmd(info, 0,
1511                                                 info->addr_unlock1,
1512                                                 AMD_CMD_UNLOCK_START);
1513                                 if (info->device_id == ATM_ID_BV6416)
1514                                         flash_write_cmd(info, sector,
1515                                                 0, ATM_CMD_UNLOCK_SECT);
1516                         }
1517                 }
1518                 if (info->legacy_unlock) {
1519                         int flag = disable_interrupts();
1520                         int lock_flag;
1521
1522                         flash_unlock_seq(info, 0);
1523                         flash_write_cmd(info, 0, info->addr_unlock1,
1524                                         AMD_CMD_SET_PPB_ENTRY);
1525                         lock_flag = flash_isset(info, sector, 0, 0x01);
1526                         if (prot) {
1527                                 if (lock_flag) {
1528                                         flash_write_cmd(info, sector, 0,
1529                                                 AMD_CMD_PPB_LOCK_BC1);
1530                                         flash_write_cmd(info, sector, 0,
1531                                                 AMD_CMD_PPB_LOCK_BC2);
1532                                 }
1533                                 debug("sector %ld %slocked\n", sector,
1534                                         lock_flag ? "" : "already ");
1535                         } else {
1536                                 if (!lock_flag) {
1537                                         debug("unlock %ld\n", sector);
1538                                         flash_write_cmd(info, 0, 0,
1539                                                 AMD_CMD_PPB_UNLOCK_BC1);
1540                                         flash_write_cmd(info, 0, 0,
1541                                                 AMD_CMD_PPB_UNLOCK_BC2);
1542                                 }
1543                                 debug("sector %ld %sunlocked\n", sector,
1544                                         !lock_flag ? "" : "already ");
1545                         }
1546                         if (flag)
1547                                 enable_interrupts();
1548
1549                         if (flash_status_check(info, sector,
1550                                         info->erase_blk_tout,
1551                                         prot ? "protect" : "unprotect"))
1552                                 printf("status check error\n");
1553
1554                         flash_write_cmd(info, 0, 0,
1555                                         AMD_CMD_SET_PPB_EXIT_BC1);
1556                         flash_write_cmd(info, 0, 0,
1557                                         AMD_CMD_SET_PPB_EXIT_BC2);
1558                 }
1559                 break;
1560 #ifdef CONFIG_FLASH_CFI_LEGACY
1561         case CFI_CMDSET_AMD_LEGACY:
1562                 flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
1563                 flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT);
1564                 if (prot)
1565                         flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET);
1566                 else
1567                         flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
1568 #endif
1569         };
1570
1571         /*
1572          * Flash needs to be in status register read mode for
1573          * flash_full_status_check() to work correctly
1574          */
1575         flash_write_cmd(info, sector, 0, FLASH_CMD_READ_STATUS);
1576         retcode = flash_full_status_check(info, sector, info->erase_blk_tout,
1577                                       prot ? "protect" : "unprotect");
1578         if (retcode == 0) {
1579                 info->protect[sector] = prot;
1580
1581                 /*
1582                  * On some of Intel's flash chips (marked via legacy_unlock)
1583                  * unprotect unprotects all locking.
1584                  */
1585                 if (prot == 0 && info->legacy_unlock) {
1586                         flash_sect_t i;
1587
1588                         for (i = 0; i < info->sector_count; i++) {
1589                                 if (info->protect[i])
1590                                         flash_real_protect(info, i, 1);
1591                         }
1592                 }
1593         }
1594         return retcode;
1595 }
1596
1597 /*-----------------------------------------------------------------------
1598  * flash_read_user_serial - read the OneTimeProgramming cells
1599  */
1600 void flash_read_user_serial(flash_info_t *info, void *buffer, int offset,
1601                              int len)
1602 {
1603         uchar *src;
1604         uchar *dst;
1605
1606         dst = buffer;
1607         src = flash_map(info, 0, FLASH_OFFSET_USER_PROTECTION);
1608         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1609         memcpy(dst, src + offset, len);
1610         flash_write_cmd(info, 0, 0, info->cmd_reset);
1611         udelay(1);
1612         flash_unmap(info, 0, FLASH_OFFSET_USER_PROTECTION, src);
1613 }
1614
1615 /*
1616  * flash_read_factory_serial - read the device Id from the protection area
1617  */
1618 void flash_read_factory_serial(flash_info_t *info, void *buffer, int offset,
1619                                 int len)
1620 {
1621         uchar *src;
1622
1623         src = flash_map(info, 0, FLASH_OFFSET_INTEL_PROTECTION);
1624         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1625         memcpy(buffer, src + offset, len);
1626         flash_write_cmd(info, 0, 0, info->cmd_reset);
1627         udelay(1);
1628         flash_unmap(info, 0, FLASH_OFFSET_INTEL_PROTECTION, src);
1629 }
1630
1631 #endif /* CONFIG_SYS_FLASH_PROTECTION */
1632
1633 /*-----------------------------------------------------------------------
1634  * Reverse the order of the erase regions in the CFI QRY structure.
1635  * This is needed for chips that are either a) correctly detected as
1636  * top-boot, or b) buggy.
1637  */
1638 static void cfi_reverse_geometry(struct cfi_qry *qry)
1639 {
1640         unsigned int i, j;
1641         u32 tmp;
1642
1643         for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) {
1644                 tmp = get_unaligned(&qry->erase_region_info[i]);
1645                 put_unaligned(get_unaligned(&qry->erase_region_info[j]),
1646                               &qry->erase_region_info[i]);
1647                 put_unaligned(tmp, &qry->erase_region_info[j]);
1648         }
1649 }
1650
1651 /*-----------------------------------------------------------------------
1652  * read jedec ids from device and set corresponding fields in info struct
1653  *
1654  * Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
1655  *
1656  */
1657 static void cmdset_intel_read_jedec_ids(flash_info_t *info)
1658 {
1659         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1660         udelay(1);
1661         flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
1662         udelay(1000); /* some flash are slow to respond */
1663         info->manufacturer_id = flash_read_uchar(info,
1664                                         FLASH_OFFSET_MANUFACTURER_ID);
1665         info->device_id = (info->chipwidth == FLASH_CFI_16BIT) ?
1666                         flash_read_word(info, FLASH_OFFSET_DEVICE_ID) :
1667                         flash_read_uchar(info, FLASH_OFFSET_DEVICE_ID);
1668         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1669 }
1670
1671 static int cmdset_intel_init(flash_info_t *info, struct cfi_qry *qry)
1672 {
1673         info->cmd_reset = FLASH_CMD_RESET;
1674
1675         cmdset_intel_read_jedec_ids(info);
1676         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1677
1678 #ifdef CONFIG_SYS_FLASH_PROTECTION
1679         /* read legacy lock/unlock bit from intel flash */
1680         if (info->ext_addr) {
1681                 info->legacy_unlock = flash_read_uchar(info,
1682                                 info->ext_addr + 5) & 0x08;
1683         }
1684 #endif
1685
1686         return 0;
1687 }
1688
1689 static void cmdset_amd_read_jedec_ids(flash_info_t *info)
1690 {
1691         ushort bankId = 0;
1692         uchar  manuId;
1693         uchar  feature;
1694
1695         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1696         flash_unlock_seq(info, 0);
1697         flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
1698         udelay(1000); /* some flash are slow to respond */
1699
1700         manuId = flash_read_uchar(info, FLASH_OFFSET_MANUFACTURER_ID);
1701         /* JEDEC JEP106Z specifies ID codes up to bank 7 */
1702         while (manuId == FLASH_CONTINUATION_CODE && bankId < 0x800) {
1703                 bankId += 0x100;
1704                 manuId = flash_read_uchar(info,
1705                         bankId | FLASH_OFFSET_MANUFACTURER_ID);
1706         }
1707         info->manufacturer_id = manuId;
1708
1709         debug("info->ext_addr = 0x%x, cfi_version = 0x%x\n",
1710               info->ext_addr, info->cfi_version);
1711         if (info->ext_addr && info->cfi_version >= 0x3134) {
1712                 /* read software feature (at 0x53) */
1713                 feature = flash_read_uchar(info, info->ext_addr + 0x13);
1714                 debug("feature = 0x%x\n", feature);
1715                 info->sr_supported = feature & 0x1;
1716         }
1717
1718         switch (info->chipwidth) {
1719         case FLASH_CFI_8BIT:
1720                 info->device_id = flash_read_uchar(info,
1721                                                 FLASH_OFFSET_DEVICE_ID);
1722                 if (info->device_id == 0x7E) {
1723                         /* AMD 3-byte (expanded) device ids */
1724                         info->device_id2 = flash_read_uchar(info,
1725                                                 FLASH_OFFSET_DEVICE_ID2);
1726                         info->device_id2 <<= 8;
1727                         info->device_id2 |= flash_read_uchar(info,
1728                                                 FLASH_OFFSET_DEVICE_ID3);
1729                 }
1730                 break;
1731         case FLASH_CFI_16BIT:
1732                 info->device_id = flash_read_word(info,
1733                                                 FLASH_OFFSET_DEVICE_ID);
1734                 if ((info->device_id & 0xff) == 0x7E) {
1735                         /* AMD 3-byte (expanded) device ids */
1736                         info->device_id2 = flash_read_uchar(info,
1737                                                 FLASH_OFFSET_DEVICE_ID2);
1738                         info->device_id2 <<= 8;
1739                         info->device_id2 |= flash_read_uchar(info,
1740                                                 FLASH_OFFSET_DEVICE_ID3);
1741                 }
1742                 break;
1743         default:
1744                 break;
1745         }
1746         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1747         udelay(1);
1748 }
1749
1750 static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry)
1751 {
1752         info->cmd_reset = AMD_CMD_RESET;
1753         info->cmd_erase_sector = AMD_CMD_ERASE_SECTOR;
1754
1755         cmdset_amd_read_jedec_ids(info);
1756         flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI);
1757
1758 #ifdef CONFIG_SYS_FLASH_PROTECTION
1759         if (info->ext_addr) {
1760                 /* read sector protect/unprotect scheme (at 0x49) */
1761                 if (flash_read_uchar(info, info->ext_addr + 9) == 0x8)
1762                         info->legacy_unlock = 1;
1763         }
1764 #endif
1765
1766         return 0;
1767 }
1768
1769 #ifdef CONFIG_FLASH_CFI_LEGACY
1770 static void flash_read_jedec_ids(flash_info_t *info)
1771 {
1772         info->manufacturer_id = 0;
1773         info->device_id       = 0;
1774         info->device_id2      = 0;
1775
1776         switch (info->vendor) {
1777         case CFI_CMDSET_INTEL_PROG_REGIONS:
1778         case CFI_CMDSET_INTEL_STANDARD:
1779         case CFI_CMDSET_INTEL_EXTENDED:
1780                 cmdset_intel_read_jedec_ids(info);
1781                 break;
1782         case CFI_CMDSET_AMD_STANDARD:
1783         case CFI_CMDSET_AMD_EXTENDED:
1784                 cmdset_amd_read_jedec_ids(info);
1785                 break;
1786         default:
1787                 break;
1788         }
1789 }
1790
1791 /*-----------------------------------------------------------------------
1792  * Call board code to request info about non-CFI flash.
1793  * board_flash_get_legacy needs to fill in at least:
1794  * info->portwidth, info->chipwidth and info->interface for Jedec probing.
1795  */
1796 static int flash_detect_legacy(phys_addr_t base, int banknum)
1797 {
1798         flash_info_t *info = &flash_info[banknum];
1799
1800         if (board_flash_get_legacy(base, banknum, info)) {
1801                 /* board code may have filled info completely. If not, we
1802                  * use JEDEC ID probing.
1803                  */
1804                 if (!info->vendor) {
1805                         int modes[] = {
1806                                 CFI_CMDSET_AMD_STANDARD,
1807                                 CFI_CMDSET_INTEL_STANDARD
1808                         };
1809                         int i;
1810
1811                         for (i = 0; i < ARRAY_SIZE(modes); i++) {
1812                                 info->vendor = modes[i];
1813                                 info->start[0] =
1814                                         (ulong)map_physmem(base,
1815                                                            info->portwidth,
1816                                                            MAP_NOCACHE);
1817                                 if (info->portwidth == FLASH_CFI_8BIT &&
1818                                         info->interface == FLASH_CFI_X8X16) {
1819                                         info->addr_unlock1 = 0x2AAA;
1820                                         info->addr_unlock2 = 0x5555;
1821                                 } else {
1822                                         info->addr_unlock1 = 0x5555;
1823                                         info->addr_unlock2 = 0x2AAA;
1824                                 }
1825                                 flash_read_jedec_ids(info);
1826                                 debug("JEDEC PROBE: ID %x %x %x\n",
1827                                                 info->manufacturer_id,
1828                                                 info->device_id,
1829                                                 info->device_id2);
1830                                 if (jedec_flash_match(info, info->start[0]))
1831                                         break;
1832
1833                                 unmap_physmem((void *)info->start[0],
1834                                               info->portwidth);
1835                         }
1836                 }
1837
1838                 switch (info->vendor) {
1839                 case CFI_CMDSET_INTEL_PROG_REGIONS:
1840                 case CFI_CMDSET_INTEL_STANDARD:
1841                 case CFI_CMDSET_INTEL_EXTENDED:
1842                         info->cmd_reset = FLASH_CMD_RESET;
1843                         break;
1844                 case CFI_CMDSET_AMD_STANDARD:
1845                 case CFI_CMDSET_AMD_EXTENDED:
1846                 case CFI_CMDSET_AMD_LEGACY:
1847                         info->cmd_reset = AMD_CMD_RESET;
1848                         break;
1849                 }
1850                 info->flash_id = FLASH_MAN_CFI;
1851                 return 1;
1852         }
1853         return 0; /* use CFI */
1854 }
1855 #else
1856 static inline int flash_detect_legacy(phys_addr_t base, int banknum)
1857 {
1858         return 0; /* use CFI */
1859 }
1860 #endif
1861
1862 /*-----------------------------------------------------------------------
1863  * detect if flash is compatible with the Common Flash Interface (CFI)
1864  * http://www.jedec.org/download/search/jesd68.pdf
1865  */
1866 static void flash_read_cfi(flash_info_t *info, void *buf,
1867                 unsigned int start, size_t len)
1868 {
1869         u8 *p = buf;
1870         unsigned int i;
1871
1872         for (i = 0; i < len; i++)
1873                 p[i] = flash_read_uchar(info, start + i);
1874 }
1875
1876 static void __flash_cmd_reset(flash_info_t *info)
1877 {
1878         /*
1879          * We do not yet know what kind of commandset to use, so we issue
1880          * the reset command in both Intel and AMD variants, in the hope
1881          * that AMD flash roms ignore the Intel command.
1882          */
1883         flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
1884         udelay(1);
1885         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
1886 }
1887
1888 void flash_cmd_reset(flash_info_t *info)
1889         __attribute__((weak, alias("__flash_cmd_reset")));
1890
1891 static int __flash_detect_cfi(flash_info_t *info, struct cfi_qry *qry)
1892 {
1893         int cfi_offset;
1894
1895         /* Issue FLASH reset command */
1896         flash_cmd_reset(info);
1897
1898         for (cfi_offset = 0; cfi_offset < ARRAY_SIZE(flash_offset_cfi);
1899              cfi_offset++) {
1900                 flash_write_cmd(info, 0, flash_offset_cfi[cfi_offset],
1901                                  FLASH_CMD_CFI);
1902                 if (flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP, 'Q') &&
1903                         flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R') &&
1904                         flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
1905                         flash_read_cfi(info, qry, FLASH_OFFSET_CFI_RESP,
1906                                         sizeof(struct cfi_qry));
1907                         info->interface = le16_to_cpu(qry->interface_desc);
1908
1909                         info->cfi_offset = flash_offset_cfi[cfi_offset];
1910                         debug("device interface is %d\n",
1911                                info->interface);
1912                         debug("found port %d chip %d ",
1913                                info->portwidth, info->chipwidth);
1914                         debug("port %d bits chip %d bits\n",
1915                                info->portwidth << CFI_FLASH_SHIFT_WIDTH,
1916                                info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
1917
1918                         /* calculate command offsets as in the Linux driver */
1919                         info->addr_unlock1 = 0x555;
1920                         info->addr_unlock2 = 0x2aa;
1921
1922                         /*
1923                          * modify the unlock address if we are
1924                          * in compatibility mode
1925                          */
1926                         if (/* x8/x16 in x8 mode */
1927                             (info->chipwidth == FLASH_CFI_BY8 &&
1928                                 info->interface == FLASH_CFI_X8X16) ||
1929                             /* x16/x32 in x16 mode */
1930                             (info->chipwidth == FLASH_CFI_BY16 &&
1931                                 info->interface == FLASH_CFI_X16X32)) {
1932                                 info->addr_unlock1 = 0xaaa;
1933                                 info->addr_unlock2 = 0x555;
1934                         }
1935
1936                         info->name = "CFI conformant";
1937                         return 1;
1938                 }
1939         }
1940
1941         return 0;
1942 }
1943
1944 static int flash_detect_cfi(flash_info_t *info, struct cfi_qry *qry)
1945 {
1946         debug("flash detect cfi\n");
1947
1948         for (info->portwidth = CONFIG_SYS_FLASH_CFI_WIDTH;
1949              info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
1950                 for (info->chipwidth = FLASH_CFI_BY8;
1951                      info->chipwidth <= info->portwidth;
1952                      info->chipwidth <<= 1)
1953                         if (__flash_detect_cfi(info, qry))
1954                                 return 1;
1955         }
1956         debug("not found\n");
1957         return 0;
1958 }
1959
1960 /*
1961  * Manufacturer-specific quirks. Add workarounds for geometry
1962  * reversal, etc. here.
1963  */
1964 static void flash_fixup_amd(flash_info_t *info, struct cfi_qry *qry)
1965 {
1966         /* check if flash geometry needs reversal */
1967         if (qry->num_erase_regions > 1) {
1968                 /* reverse geometry if top boot part */
1969                 if (info->cfi_version < 0x3131) {
1970                         /* CFI < 1.1, try to guess from device id */
1971                         if ((info->device_id & 0x80) != 0)
1972                                 cfi_reverse_geometry(qry);
1973                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
1974                         /* CFI >= 1.1, deduct from top/bottom flag */
1975                         /* note: ext_addr is valid since cfi_version > 0 */
1976                         cfi_reverse_geometry(qry);
1977                 }
1978         }
1979 }
1980
1981 static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
1982 {
1983         int reverse_geometry = 0;
1984
1985         /* Check the "top boot" bit in the PRI */
1986         if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1))
1987                 reverse_geometry = 1;
1988
1989         /* AT49BV6416(T) list the erase regions in the wrong order.
1990          * However, the device ID is identical with the non-broken
1991          * AT49BV642D they differ in the high byte.
1992          */
1993         if (info->device_id == 0xd6 || info->device_id == 0xd2)
1994                 reverse_geometry = !reverse_geometry;
1995
1996         if (reverse_geometry)
1997                 cfi_reverse_geometry(qry);
1998 }
1999
2000 static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
2001 {
2002         /* check if flash geometry needs reversal */
2003         if (qry->num_erase_regions > 1) {
2004                 /* reverse geometry if top boot part */
2005                 if (info->cfi_version < 0x3131) {
2006                         /* CFI < 1.1, guess by device id */
2007                         if (info->device_id == 0x22CA || /* M29W320DT */
2008                             info->device_id == 0x2256 || /* M29W320ET */
2009                             info->device_id == 0x22D7) { /* M29W800DT */
2010                                 cfi_reverse_geometry(qry);
2011                         }
2012                 } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
2013                         /* CFI >= 1.1, deduct from top/bottom flag */
2014                         /* note: ext_addr is valid since cfi_version > 0 */
2015                         cfi_reverse_geometry(qry);
2016                 }
2017         }
2018 }
2019
2020 static void flash_fixup_sst(flash_info_t *info, struct cfi_qry *qry)
2021 {
2022         /*
2023          * SST, for many recent nor parallel flashes, says they are
2024          * CFI-conformant. This is not true, since qry struct.
2025          * reports a std. AMD command set (0x0002), while SST allows to
2026          * erase two different sector sizes for the same memory.
2027          * 64KB sector (SST call it block)  needs 0x30 to be erased.
2028          * 4KB  sector (SST call it sector) needs 0x50 to be erased.
2029          * Since CFI query detect the 4KB number of sectors, users expects
2030          * a sector granularity of 4KB, and it is here set.
2031          */
2032         if (info->device_id == 0x5D23 || /* SST39VF3201B */
2033             info->device_id == 0x5C23) { /* SST39VF3202B */
2034                 /* set sector granularity to 4KB */
2035                 info->cmd_erase_sector = 0x50;
2036         }
2037 }
2038
2039 static void flash_fixup_num(flash_info_t *info, struct cfi_qry *qry)
2040 {
2041         /*
2042          * The M29EW devices seem to report the CFI information wrong
2043          * when it's in 8 bit mode.
2044          * There's an app note from Numonyx on this issue.
2045          * So adjust the buffer size for M29EW while operating in 8-bit mode
2046          */
2047         if (qry->max_buf_write_size > 0x8 &&
2048                         info->device_id == 0x7E &&
2049                         (info->device_id2 == 0x2201 ||
2050                         info->device_id2 == 0x2301 ||
2051                         info->device_id2 == 0x2801 ||
2052                         info->device_id2 == 0x4801)) {
2053                 debug("Adjusted buffer size on Numonyx flash"
2054                         " M29EW family in 8 bit mode\n");
2055                 qry->max_buf_write_size = 0x8;
2056         }
2057 }
2058
2059 /*
2060  * The following code cannot be run from FLASH!
2061  *
2062  */
2063 ulong flash_get_size(phys_addr_t base, int banknum)
2064 {
2065         flash_info_t *info = &flash_info[banknum];
2066         int i, j;
2067         flash_sect_t sect_cnt;
2068         phys_addr_t sector;
2069         unsigned long tmp;
2070         int size_ratio;
2071         uchar num_erase_regions;
2072         int erase_region_size;
2073         int erase_region_count;
2074         struct cfi_qry qry;
2075         unsigned long max_size;
2076
2077         memset(&qry, 0, sizeof(qry));
2078
2079         info->ext_addr = 0;
2080         info->cfi_version = 0;
2081 #ifdef CONFIG_SYS_FLASH_PROTECTION
2082         info->legacy_unlock = 0;
2083 #endif
2084
2085         info->start[0] = (ulong)map_physmem(base, info->portwidth, MAP_NOCACHE);
2086
2087         if (flash_detect_cfi(info, &qry)) {
2088                 info->vendor = le16_to_cpu(get_unaligned(&qry.p_id));
2089                 info->ext_addr = le16_to_cpu(get_unaligned(&qry.p_adr));
2090                 num_erase_regions = qry.num_erase_regions;
2091
2092                 if (info->ext_addr) {
2093                         info->cfi_version = (ushort)flash_read_uchar(info,
2094                                                 info->ext_addr + 3) << 8;
2095                         info->cfi_version |= (ushort)flash_read_uchar(info,
2096                                                 info->ext_addr + 4);
2097                 }
2098
2099 #ifdef DEBUG
2100                 flash_printqry(&qry);
2101 #endif
2102
2103                 switch (info->vendor) {
2104                 case CFI_CMDSET_INTEL_PROG_REGIONS:
2105                 case CFI_CMDSET_INTEL_STANDARD:
2106                 case CFI_CMDSET_INTEL_EXTENDED:
2107                         cmdset_intel_init(info, &qry);
2108                         break;
2109                 case CFI_CMDSET_AMD_STANDARD:
2110                 case CFI_CMDSET_AMD_EXTENDED:
2111                         cmdset_amd_init(info, &qry);
2112                         break;
2113                 default:
2114                         printf("CFI: Unknown command set 0x%x\n",
2115                                         info->vendor);
2116                         /*
2117                          * Unfortunately, this means we don't know how
2118                          * to get the chip back to Read mode. Might
2119                          * as well try an Intel-style reset...
2120                          */
2121                         flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
2122                         return 0;
2123                 }
2124
2125                 /* Do manufacturer-specific fixups */
2126                 switch (info->manufacturer_id) {
2127                 case 0x0001: /* AMD */
2128                 case 0x0037: /* AMIC */
2129                         flash_fixup_amd(info, &qry);
2130                         break;
2131                 case 0x001f:
2132                         flash_fixup_atmel(info, &qry);
2133                         break;
2134                 case 0x0020:
2135                         flash_fixup_stm(info, &qry);
2136                         break;
2137                 case 0x00bf: /* SST */
2138                         flash_fixup_sst(info, &qry);
2139                         break;
2140                 case 0x0089: /* Numonyx */
2141                         flash_fixup_num(info, &qry);
2142                         break;
2143                 }
2144
2145                 debug("manufacturer is %d\n", info->vendor);
2146                 debug("manufacturer id is 0x%x\n", info->manufacturer_id);
2147                 debug("device id is 0x%x\n", info->device_id);
2148                 debug("device id2 is 0x%x\n", info->device_id2);
2149                 debug("cfi version is 0x%04x\n", info->cfi_version);
2150
2151                 size_ratio = info->portwidth / info->chipwidth;
2152                 /* if the chip is x8/x16 reduce the ratio by half */
2153                 if (info->interface == FLASH_CFI_X8X16 &&
2154                         info->chipwidth == FLASH_CFI_BY8) {
2155                         size_ratio >>= 1;
2156                 }
2157                 debug("size_ratio %d port %d bits chip %d bits\n",
2158                        size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
2159                        info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
2160                 info->size = 1 << qry.dev_size;
2161                 /* multiply the size by the number of chips */
2162                 info->size *= size_ratio;
2163                 max_size = cfi_flash_bank_size(banknum);
2164                 if (max_size && info->size > max_size) {
2165                         debug("[truncated from %ldMiB]", info->size >> 20);
2166                         info->size = max_size;
2167                 }
2168                 debug("found %d erase regions\n", num_erase_regions);
2169                 sect_cnt = 0;
2170                 sector = base;
2171                 for (i = 0; i < num_erase_regions; i++) {
2172                         if (i > NUM_ERASE_REGIONS) {
2173                                 printf("%d erase regions found, only %d used\n",
2174                                         num_erase_regions, NUM_ERASE_REGIONS);
2175                                 break;
2176                         }
2177
2178                         tmp = le32_to_cpu(get_unaligned(
2179                                                 &qry.erase_region_info[i]));
2180                         debug("erase region %u: 0x%08lx\n", i, tmp);
2181
2182                         erase_region_count = (tmp & 0xffff) + 1;
2183                         tmp >>= 16;
2184                         erase_region_size =
2185                                 (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
2186                         debug("erase_region_count = %d erase_region_size = %d\n",
2187                                 erase_region_count, erase_region_size);
2188                         for (j = 0; j < erase_region_count; j++) {
2189                                 if (sector - base >= info->size)
2190                                         break;
2191                                 if (sect_cnt >= CONFIG_SYS_MAX_FLASH_SECT) {
2192                                         printf("ERROR: too many flash sectors\n");
2193                                         break;
2194                                 }
2195                                 info->start[sect_cnt] =
2196                                         (ulong)map_physmem(sector,
2197                                                            info->portwidth,
2198                                                            MAP_NOCACHE);
2199                                 sector += (erase_region_size * size_ratio);
2200
2201                                 /*
2202                                  * Only read protection status from
2203                                  * supported devices (intel...)
2204                                  */
2205                                 switch (info->vendor) {
2206                                 case CFI_CMDSET_INTEL_PROG_REGIONS:
2207                                 case CFI_CMDSET_INTEL_EXTENDED:
2208                                 case CFI_CMDSET_INTEL_STANDARD:
2209                                         /*
2210                                          * Set flash to read-id mode. Otherwise
2211                                          * reading protected status is not
2212                                          * guaranteed.
2213                                          */
2214                                         flash_write_cmd(info, sect_cnt, 0,
2215                                                         FLASH_CMD_READ_ID);
2216                                         info->protect[sect_cnt] =
2217                                                 flash_isset(info, sect_cnt,
2218                                                              FLASH_OFFSET_PROTECT,
2219                                                              FLASH_STATUS_PROTECT);
2220                                         flash_write_cmd(info, sect_cnt, 0,
2221                                                         FLASH_CMD_RESET);
2222                                         break;
2223                                 case CFI_CMDSET_AMD_EXTENDED:
2224                                 case CFI_CMDSET_AMD_STANDARD:
2225                                         if (!info->legacy_unlock) {
2226                                                 /* default: not protected */
2227                                                 info->protect[sect_cnt] = 0;
2228                                                 break;
2229                                         }
2230
2231                                         /* Read protection (PPB) from sector */
2232                                         flash_write_cmd(info, 0, 0,
2233                                                         info->cmd_reset);
2234                                         flash_unlock_seq(info, 0);
2235                                         flash_write_cmd(info, 0,
2236                                                         info->addr_unlock1,
2237                                                         FLASH_CMD_READ_ID);
2238                                         info->protect[sect_cnt] =
2239                                                 flash_isset(
2240                                                         info, sect_cnt,
2241                                                         FLASH_OFFSET_PROTECT,
2242                                                         FLASH_STATUS_PROTECT);
2243                                         break;
2244                                 default:
2245                                         /* default: not protected */
2246                                         info->protect[sect_cnt] = 0;
2247                                 }
2248
2249                                 sect_cnt++;
2250                         }
2251                 }
2252
2253                 info->sector_count = sect_cnt;
2254                 info->buffer_size = 1 << le16_to_cpu(qry.max_buf_write_size);
2255                 tmp = 1 << qry.block_erase_timeout_typ;
2256                 info->erase_blk_tout = tmp *
2257                         (1 << qry.block_erase_timeout_max);
2258                 tmp = (1 << qry.buf_write_timeout_typ) *
2259                         (1 << qry.buf_write_timeout_max);
2260
2261                 /* round up when converting to ms */
2262                 info->buffer_write_tout = (tmp + 999) / 1000;
2263                 tmp = (1 << qry.word_write_timeout_typ) *
2264                         (1 << qry.word_write_timeout_max);
2265                 /* round up when converting to ms */
2266                 info->write_tout = (tmp + 999) / 1000;
2267                 info->flash_id = FLASH_MAN_CFI;
2268                 if (info->interface == FLASH_CFI_X8X16 &&
2269                     info->chipwidth == FLASH_CFI_BY8) {
2270                         /* XXX - Need to test on x8/x16 in parallel. */
2271                         info->portwidth >>= 1;
2272                 }
2273
2274                 flash_write_cmd(info, 0, 0, info->cmd_reset);
2275         }
2276
2277         return (info->size);
2278 }
2279
2280 #ifdef CONFIG_FLASH_CFI_MTD
2281 void flash_set_verbose(uint v)
2282 {
2283         flash_verbose = v;
2284 }
2285 #endif
2286
2287 static void cfi_flash_set_config_reg(u32 base, u16 val)
2288 {
2289 #ifdef CONFIG_SYS_CFI_FLASH_CONFIG_REGS
2290         /*
2291          * Only set this config register if really defined
2292          * to a valid value (0xffff is invalid)
2293          */
2294         if (val == 0xffff)
2295                 return;
2296
2297         /*
2298          * Set configuration register. Data is "encrypted" in the 16 lower
2299          * address bits.
2300          */
2301         flash_write16(FLASH_CMD_SETUP, (void *)(base + (val << 1)));
2302         flash_write16(FLASH_CMD_SET_CR_CONFIRM, (void *)(base + (val << 1)));
2303
2304         /*
2305          * Finally issue reset-command to bring device back to
2306          * read-array mode
2307          */
2308         flash_write16(FLASH_CMD_RESET, (void *)base);
2309 #endif
2310 }
2311
2312 /*-----------------------------------------------------------------------
2313  */
2314
2315 static void flash_protect_default(void)
2316 {
2317 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2318         int i;
2319         struct apl_s {
2320                 ulong start;
2321                 ulong size;
2322         } apl[] = CONFIG_SYS_FLASH_AUTOPROTECT_LIST;
2323 #endif
2324
2325         /* Monitor protection ON by default */
2326 #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) && \
2327         (!defined(CONFIG_MONITOR_IS_IN_RAM))
2328         flash_protect(FLAG_PROTECT_SET,
2329                        CONFIG_SYS_MONITOR_BASE,
2330                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len  - 1,
2331                        flash_get_info(CONFIG_SYS_MONITOR_BASE));
2332 #endif
2333
2334         /* Environment protection ON by default */
2335 #ifdef CONFIG_ENV_IS_IN_FLASH
2336         flash_protect(FLAG_PROTECT_SET,
2337                        CONFIG_ENV_ADDR,
2338                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
2339                        flash_get_info(CONFIG_ENV_ADDR));
2340 #endif
2341
2342         /* Redundant environment protection ON by default */
2343 #ifdef CONFIG_ENV_ADDR_REDUND
2344         flash_protect(FLAG_PROTECT_SET,
2345                        CONFIG_ENV_ADDR_REDUND,
2346                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
2347                        flash_get_info(CONFIG_ENV_ADDR_REDUND));
2348 #endif
2349
2350 #if defined(CONFIG_SYS_FLASH_AUTOPROTECT_LIST)
2351         for (i = 0; i < ARRAY_SIZE(apl); i++) {
2352                 debug("autoprotecting from %08lx to %08lx\n",
2353                       apl[i].start, apl[i].start + apl[i].size - 1);
2354                 flash_protect(FLAG_PROTECT_SET,
2355                                apl[i].start,
2356                                apl[i].start + apl[i].size - 1,
2357                                flash_get_info(apl[i].start));
2358         }
2359 #endif
2360 }
2361
2362 unsigned long flash_init(void)
2363 {
2364         unsigned long size = 0;
2365         int i;
2366
2367 #ifdef CONFIG_SYS_FLASH_PROTECTION
2368         /* read environment from EEPROM */
2369         char s[64];
2370
2371         env_get_f("unlock", s, sizeof(s));
2372 #endif
2373
2374 #ifdef CONFIG_CFI_FLASH /* for driver model */
2375         cfi_flash_init_dm();
2376 #endif
2377
2378         /* Init: no FLASHes known */
2379         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
2380                 flash_info[i].flash_id = FLASH_UNKNOWN;
2381
2382                 /* Optionally write flash configuration register */
2383                 cfi_flash_set_config_reg(cfi_flash_bank_addr(i),
2384                                          cfi_flash_config_reg(i));
2385
2386                 if (!flash_detect_legacy(cfi_flash_bank_addr(i), i))
2387                         flash_get_size(cfi_flash_bank_addr(i), i);
2388                 size += flash_info[i].size;
2389                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
2390 #ifndef CONFIG_SYS_FLASH_QUIET_TEST
2391                         printf("## Unknown flash on Bank %d "
2392                                 "- Size = 0x%08lx = %ld MB\n",
2393                                 i + 1, flash_info[i].size,
2394                                 flash_info[i].size >> 20);
2395 #endif /* CONFIG_SYS_FLASH_QUIET_TEST */
2396                 }
2397 #ifdef CONFIG_SYS_FLASH_PROTECTION
2398                 else if (strcmp(s, "yes") == 0) {
2399                         /*
2400                          * Only the U-Boot image and it's environment
2401                          * is protected, all other sectors are
2402                          * unprotected (unlocked) if flash hardware
2403                          * protection is used (CONFIG_SYS_FLASH_PROTECTION)
2404                          * and the environment variable "unlock" is
2405                          * set to "yes".
2406                          */
2407                         if (flash_info[i].legacy_unlock) {
2408                                 int k;
2409
2410                                 /*
2411                                  * Disable legacy_unlock temporarily,
2412                                  * since flash_real_protect would
2413                                  * relock all other sectors again
2414                                  * otherwise.
2415                                  */
2416                                 flash_info[i].legacy_unlock = 0;
2417
2418                                 /*
2419                                  * Legacy unlocking (e.g. Intel J3) ->
2420                                  * unlock only one sector. This will
2421                                  * unlock all sectors.
2422                                  */
2423                                 flash_real_protect(&flash_info[i], 0, 0);
2424
2425                                 flash_info[i].legacy_unlock = 1;
2426
2427                                 /*
2428                                  * Manually mark other sectors as
2429                                  * unlocked (unprotected)
2430                                  */
2431                                 for (k = 1; k < flash_info[i].sector_count; k++)
2432                                         flash_info[i].protect[k] = 0;
2433                         } else {
2434                                 /*
2435                                  * No legancy unlocking -> unlock all sectors
2436                                  */
2437                                 flash_protect(FLAG_PROTECT_CLEAR,
2438                                                flash_info[i].start[0],
2439                                                flash_info[i].start[0]
2440                                                + flash_info[i].size - 1,
2441                                                &flash_info[i]);
2442                         }
2443                 }
2444 #endif /* CONFIG_SYS_FLASH_PROTECTION */
2445         }
2446
2447         flash_protect_default();
2448 #ifdef CONFIG_FLASH_CFI_MTD
2449         cfi_mtd_init();
2450 #endif
2451
2452         return (size);
2453 }
2454
2455 #ifdef CONFIG_CFI_FLASH /* for driver model */
2456 static int cfi_flash_probe(struct udevice *dev)
2457 {
2458         void *blob = (void *)gd->fdt_blob;
2459         int node = dev_of_offset(dev);
2460         const fdt32_t *cell;
2461         phys_addr_t addr;
2462         int parent, addrc, sizec;
2463         int len, idx;
2464
2465         parent = fdt_parent_offset(blob, node);
2466         fdt_support_default_count_cells(blob, parent, &addrc, &sizec);
2467         /* decode regs, there may be multiple reg tuples. */
2468         cell = fdt_getprop(blob, node, "reg", &len);
2469         if (!cell)
2470                 return -ENOENT;
2471         idx = 0;
2472         len /= sizeof(fdt32_t);
2473         while (idx < len) {
2474                 addr = fdt_translate_address((void *)blob,
2475                                              node, cell + idx);
2476                 flash_info[cfi_flash_num_flash_banks].dev = dev;
2477                 flash_info[cfi_flash_num_flash_banks].base = addr;
2478                 cfi_flash_num_flash_banks++;
2479                 idx += addrc + sizec;
2480         }
2481         gd->bd->bi_flashstart = flash_info[0].base;
2482
2483         return 0;
2484 }
2485
2486 static const struct udevice_id cfi_flash_ids[] = {
2487         { .compatible = "cfi-flash" },
2488         { .compatible = "jedec-flash" },
2489         {}
2490 };
2491
2492 U_BOOT_DRIVER(cfi_flash) = {
2493         .name   = "cfi_flash",
2494         .id     = UCLASS_MTD,
2495         .of_match = cfi_flash_ids,
2496         .probe = cfi_flash_probe,
2497 };
2498 #endif /* CONFIG_CFI_FLASH */