board/etin/debris/flash.c

   1 /*
   2  * board/eva/flash.c
   3  *
   4  * (C) Copyright 2002
   5  * Sangmoon Kim, Etin Systems, dogoil@etinsys.com.
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <asm/processor.h>
  12 #include <asm/pci_io.h>
  13 #include <mpc824x.h>
  14 #include <asm/mmu.h>
  15
  16 int (*do_flash_erase)(flash_info_t*, uint32_t, uint32_t);
  17 int (*write_dword)(flash_info_t*, ulong, uint64_t);
  18
  19 typedef uint64_t cfi_word;
  20
  21 #define cfi_read(flash, addr) *((volatile cfi_word*)(flash->start[0] + addr))
  22
  23 #define cfi_write(flash, val, addr) \
  24         move64((cfi_word*)&val, \
  25                         (cfi_word*)(flash->start[0] + addr))
  26
  27 #define CMD(x) ((((cfi_word)x)<<48)|(((cfi_word)x)<<32)|(((cfi_word)x)<<16)|(((cfi_word)x)))
  28
  29 static void write32(unsigned long addr, uint32_t value)
  30 {
  31         *(volatile uint32_t*)(addr) = value;
  32         asm volatile("sync");
  33 }
  34
  35 static uint32_t read32(unsigned long addr)
  36 {
  37         uint32_t value;
  38         value = *(volatile uint32_t*)addr;
  39         asm volatile("sync");
  40         return value;
  41 }
  42
  43 static cfi_word cfi_cmd(flash_info_t *flash, uint8_t cmd, uint32_t addr)
  44 {
  45         uint32_t base = flash->start[0];
  46         uint32_t val=(cmd << 16) | cmd;
  47         addr <<= 3;
  48         write32(base + addr, val);
  49         return addr;
  50 }
  51
  52 static uint16_t cfi_read_query(flash_info_t *flash, uint32_t addr)
  53 {
  54         uint32_t base = flash->start[0];
  55         addr <<= 3;
  56         return (uint16_t)read32(base + addr);
  57 }
  58
  59 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  60
  61 static void move64(uint64_t *src, uint64_t *dest)
  62 {
  63         asm volatile("lfd  0, 0(3)\n\t" /* fpr0   =  *scr       */
  64          "stfd 0, 0(4)"         /* *dest  =  fpr0       */
  65          : : : "fr0" );         /* Clobbers fr0         */
  66         return;
  67 }
  68
  69 static int cfi_write_dword(flash_info_t *flash, ulong dest, cfi_word data)
  70 {
  71         unsigned long start;
  72         cfi_word status = 0;
  73
  74         status = cfi_read(flash, dest);
  75         data &= status;
  76
  77         cfi_cmd(flash, 0x40, 0);
  78         cfi_write(flash, data, dest);
  79
  80         udelay(10);
  81         start = get_timer (0);
  82         for(;;) {
  83                 status = cfi_read(flash, dest);
  84                 status &= CMD(0x80);
  85                 if(status == CMD(0x80))
  86                         break;
  87                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
  88                         cfi_cmd(flash, 0xff, 0);
  89                         return 1;
  90                 }
  91                 udelay(1);
  92         }
  93         cfi_cmd(flash, 0xff, 0);
  94
  95         return 0;
  96 }
  97
  98 static int jedec_write_dword (flash_info_t *flash, ulong dest, cfi_word data)
  99 {
 100         ulong start;
 101         cfi_word status = 0;
 102
 103         status = cfi_read(flash, dest);
 104         if(status != CMD(0xffff)) return 2;
 105
 106         cfi_cmd(flash, 0xaa, 0x555);
 107         cfi_cmd(flash, 0x55, 0x2aa);
 108         cfi_cmd(flash, 0xa0, 0x555);
 109
 110         cfi_write(flash, data, dest);
 111
 112         udelay(10);
 113         start = get_timer (0);
 114         status = ~data;
 115         while(status != data) {
 116                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 117                         return 1;
 118                 status = cfi_read(flash, dest);
 119                 udelay(1);
 120         }
 121         return 0;
 122 }
 123
 124 static __inline__ unsigned long get_msr(void)
 125 {
 126         unsigned long msr;
 127         __asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
 128         return msr;
 129 }
 130
 131 static __inline__ void set_msr(unsigned long msr)
 132 {
 133         __asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
 134 }
 135
 136 int write_buff (flash_info_t *flash, uchar *src, ulong addr, ulong cnt)
 137 {
 138         ulong wp;
 139         int i, s, l, rc;
 140         cfi_word data;
 141         uint8_t *t = (uint8_t*)&data;
 142         unsigned long base = flash->start[0];
 143         uint32_t msr;
 144
 145         if (flash->flash_id == FLASH_UNKNOWN)
 146                 return 4;
 147
 148         if (cnt == 0)
 149                 return 0;
 150
 151         addr -= base;
 152
 153         msr = get_msr();
 154         set_msr(msr|MSR_FP);
 155
 156         wp = (addr & ~7);   /* get lower word aligned address */
 157
 158         if((addr-wp) != 0) {
 159                 data = cfi_read(flash, wp);
 160                 s = addr & 7;
 161                 l = ( cnt < (8-s) ) ? cnt : (8-s);
 162                 for(i = 0; i < l; i++)
 163                         t[s+i] = *src++;
 164                 if ((rc = write_dword(flash, wp, data)) != 0)
 165                         goto DONE;
 166                 wp += 8;
 167                 cnt -= l;
 168         }
 169
 170         while (cnt >= 8) {
 171                 for (i = 0; i < 8; i++)
 172                         t[i] = *src++;
 173                 if ((rc = write_dword(flash, wp, data)) != 0)
 174                         goto DONE;
 175                 wp  += 8;
 176                 cnt -= 8;
 177         }
 178
 179         if (cnt == 0) {
 180                 rc = 0;
 181                 goto DONE;
 182         }
 183
 184         data = cfi_read(flash, wp);
 185         for(i = 0; i < cnt; i++)
 186                 t[i] = *src++;
 187         rc = write_dword(flash, wp, data);
 188 DONE:
 189         set_msr(msr);
 190         return rc;
 191 }
 192
 193 static int cfi_erase_oneblock(flash_info_t *flash, uint32_t sect)
 194 {
 195         int sa;
 196         int flag;
 197         ulong start, last, now;
 198         cfi_word status;
 199
 200         flag = disable_interrupts();
 201
 202         sa = (flash->start[sect] - flash->start[0]);
 203         write32(flash->start[sect], 0x00200020);
 204         write32(flash->start[sect], 0x00d000d0);
 205
 206         if (flag)
 207                 enable_interrupts();
 208
 209         udelay(1000);
 210         start = get_timer (0);
 211         last  = start;
 212
 213         for (;;) {
 214                 status = cfi_read(flash, sa);
 215                 status &= CMD(0x80);
 216                 if (status == CMD(0x80))
 217                         break;
 218                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 219                         cfi_cmd(flash, 0xff, 0);
 220                         printf ("Timeout\n");
 221                         return ERR_TIMOUT;
 222                 }
 223
 224                 if ((now - last) > 1000) {
 225                         serial_putc ('.');
 226                         last = now;
 227                 }
 228                 udelay(10);
 229         }
 230         cfi_cmd(flash, 0xff, 0);
 231         return ERR_OK;
 232 }
 233
 234 static int cfi_erase(flash_info_t *flash, uint32_t s_first, uint32_t s_last)
 235 {
 236         int sect;
 237         int rc = ERR_OK;
 238
 239         for (sect = s_first; sect <= s_last; sect++) {
 240                 if (flash->protect[sect] == 0) {
 241                         rc = cfi_erase_oneblock(flash, sect);
 242                         if (rc != ERR_OK) break;
 243                 }
 244         }
 245         printf (" done\n");
 246         return rc;
 247 }
 248
 249 static int jedec_erase(flash_info_t *flash, uint32_t s_first, uint32_t s_last)
 250 {
 251         int sect;
 252         cfi_word status;
 253         int sa = -1;
 254         int flag;
 255         ulong start, last, now;
 256
 257         flag = disable_interrupts();
 258
 259         cfi_cmd(flash, 0xaa, 0x555);
 260         cfi_cmd(flash, 0x55, 0x2aa);
 261         cfi_cmd(flash, 0x80, 0x555);
 262         cfi_cmd(flash, 0xaa, 0x555);
 263         cfi_cmd(flash, 0x55, 0x2aa);
 264         for ( sect = s_first; sect <= s_last; sect++) {
 265                 if (flash->protect[sect] == 0) {
 266                         sa = flash->start[sect] - flash->start[0];
 267                         write32(flash->start[sect], 0x00300030);
 268                 }
 269         }
 270         if (flag)
 271                 enable_interrupts();
 272
 273         if (sa < 0)
 274                 goto DONE;
 275
 276         udelay (1000);
 277         start = get_timer (0);
 278         last  = start;
 279         for(;;) {
 280                 status = cfi_read(flash, sa);
 281                 if (status == CMD(0xffff))
 282                         break;
 283
 284                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 285                         printf ("Timeout\n");
 286                         return ERR_TIMOUT;
 287                 }
 288
 289                 if ((now - last) > 1000) {
 290                         serial_putc ('.');
 291                         last = now;
 292                 }
 293                 udelay(10);
 294         }
 295 DONE:
 296         cfi_cmd(flash, 0xf0, 0);
 297
 298         printf (" done\n");
 299
 300         return ERR_OK;
 301 }
 302
 303 int flash_erase (flash_info_t *flash, int s_first, int s_last)
 304 {
 305         int sect;
 306         int prot;
 307
 308         if ((s_first < 0) || (s_first > s_last)) {
 309                 if (flash->flash_id == FLASH_UNKNOWN)
 310                         printf ("- missing\n");
 311                 else
 312                         printf ("- no sectors to erase\n");
 313                 return ERR_NOT_ERASED;
 314         }
 315         if (flash->flash_id == FLASH_UNKNOWN) {
 316                 printf ("Can't erase unknown flash type - aborted\n");
 317                 return ERR_NOT_ERASED;
 318         }
 319
 320         prot = 0;
 321         for (sect = s_first; sect <= s_last; sect++)
 322                 if (flash->protect[sect]) prot++;
 323
 324         if (prot)
 325                 printf ("- Warning: %d protected sectors will not be erased!\n",
 326                                                                 prot);
 327         else
 328                 printf ("\n");
 329
 330         return do_flash_erase(flash, s_first, s_last);
 331 }
 332
 333 struct jedec_flash_info {
 334         const uint16_t mfr_id;
 335         const uint16_t dev_id;
 336         const char *name;
 337         const int DevSize;
 338         const int InterfaceDesc;
 339         const int NumEraseRegions;
 340         const ulong regions[4];
 341 };
 342
 343 #define ERASEINFO(size,blocks) (size<<8)|(blocks-1)
 344
 345 #define SIZE_1MiB 20
 346 #define SIZE_2MiB 21
 347 #define SIZE_4MiB 22
 348
 349 static const struct jedec_flash_info jedec_table[] = {
 350         {
 351                 mfr_id: (uint16_t)AMD_MANUFACT,
 352                 dev_id: (uint16_t)AMD_ID_LV800T,
 353                 name: "AMD AM29LV800T",
 354                 DevSize: SIZE_1MiB,
 355                 NumEraseRegions: 4,
 356                 regions: {ERASEINFO(0x10000,15),
 357                           ERASEINFO(0x08000,1),
 358                           ERASEINFO(0x02000,2),
 359                           ERASEINFO(0x04000,1)
 360                 }
 361         }, {
 362                 mfr_id: (uint16_t)AMD_MANUFACT,
 363                 dev_id: (uint16_t)AMD_ID_LV800B,
 364                 name: "AMD AM29LV800B",
 365                 DevSize: SIZE_1MiB,
 366                 NumEraseRegions: 4,
 367                 regions: {ERASEINFO(0x10000,15),
 368                           ERASEINFO(0x08000,1),
 369                           ERASEINFO(0x02000,2),
 370                           ERASEINFO(0x04000,1)
 371                 }
 372         }, {
 373                 mfr_id: (uint16_t)AMD_MANUFACT,
 374                 dev_id: (uint16_t)AMD_ID_LV160T,
 375                 name: "AMD AM29LV160T",
 376                 DevSize: SIZE_2MiB,
 377                 NumEraseRegions: 4,
 378                 regions: {ERASEINFO(0x10000,31),
 379                           ERASEINFO(0x08000,1),
 380                           ERASEINFO(0x02000,2),
 381                           ERASEINFO(0x04000,1)
 382                 }
 383         }, {
 384                 mfr_id: (uint16_t)AMD_MANUFACT,
 385                 dev_id: (uint16_t)AMD_ID_LV160B,
 386                 name: "AMD AM29LV160B",
 387                 DevSize: SIZE_2MiB,
 388                 NumEraseRegions: 4,
 389                 regions: {ERASEINFO(0x04000,1),
 390                           ERASEINFO(0x02000,2),
 391                           ERASEINFO(0x08000,1),
 392                           ERASEINFO(0x10000,31)
 393                 }
 394         }, {
 395                 mfr_id: (uint16_t)AMD_MANUFACT,
 396                 dev_id: (uint16_t)AMD_ID_LV320T,
 397                 name: "AMD AM29LV320T",
 398                 DevSize: SIZE_4MiB,
 399                 NumEraseRegions: 2,
 400                 regions: {ERASEINFO(0x10000,63),
 401                           ERASEINFO(0x02000,8)
 402                 }
 403
 404         }, {
 405                 mfr_id: (uint16_t)AMD_MANUFACT,
 406                 dev_id: (uint16_t)AMD_ID_LV320B,
 407                 name: "AMD AM29LV320B",
 408                 DevSize: SIZE_4MiB,
 409                 NumEraseRegions: 2,
 410                 regions: {ERASEINFO(0x02000,8),
 411                           ERASEINFO(0x10000,63)
 412                 }
 413         }
 414 };
 415
 416 static ulong cfi_init(uint32_t base,  flash_info_t *flash)
 417 {
 418         int sector;
 419         int block;
 420         int block_count;
 421         int offset = 0;
 422         int reverse = 0;
 423         int primary;
 424         int mfr_id;
 425         int dev_id;
 426
 427         flash->start[0] = base;
 428         cfi_cmd(flash, 0xF0, 0);
 429         cfi_cmd(flash, 0x98, 0);
 430         if ( !( cfi_read_query(flash, 0x10) == 'Q' &&
 431                 cfi_read_query(flash, 0x11) == 'R' &&
 432                 cfi_read_query(flash, 0x12) == 'Y' )) {
 433                 cfi_cmd(flash, 0xff, 0);
 434                 return 0;
 435         }
 436
 437         flash->size = 1 << cfi_read_query(flash, 0x27);
 438         flash->size *= 4;
 439         block_count = cfi_read_query(flash, 0x2c);
 440         primary = cfi_read_query(flash, 0x15);
 441         if ( cfi_read_query(flash, primary + 4) == 0x30)
 442                 reverse = (cfi_read_query(flash, 0x1) & 0x01);
 443         else
 444                 reverse = (cfi_read_query(flash, primary+15) == 3);
 445
 446         flash->sector_count = 0;
 447
 448         for ( block = reverse ? block_count - 1 : 0;
 449                       reverse ? block >= 0      : block < block_count;
 450                       reverse ? block--         : block ++) {
 451                 int sector_size =
 452                         (cfi_read_query(flash, 0x2d + block*4+2) |
 453                         (cfi_read_query(flash, 0x2d + block*4+3) << 8)) << 8;
 454                 int sector_count =
 455                         (cfi_read_query(flash, 0x2d + block*4+0) |
 456                         (cfi_read_query(flash, 0x2d + block*4+1) << 8)) + 1;
 457                 for(sector = 0; sector < sector_count; sector++) {
 458                         flash->start[flash->sector_count++] = base + offset;
 459                         offset += sector_size * 4;
 460                 }
 461         }
 462         mfr_id = cfi_read_query(flash, 0x00);
 463         dev_id = cfi_read_query(flash, 0x01);
 464
 465         cfi_cmd(flash, 0xff, 0);
 466
 467         flash->flash_id = (mfr_id << 16) | dev_id;
 468
 469         for (sector = 0; sector < flash->sector_count; sector++) {
 470                 write32(flash->start[sector], 0x00600060);
 471                 write32(flash->start[sector], 0x00d000d0);
 472         }
 473         cfi_cmd(flash, 0xff, 0);
 474
 475         for (sector = 0; sector < flash->sector_count; sector++)
 476                 flash->protect[sector] = 0;
 477
 478         do_flash_erase = cfi_erase;
 479         write_dword = cfi_write_dword;
 480
 481         return flash->size;
 482 }
 483
 484 static ulong jedec_init(unsigned long base, flash_info_t *flash)
 485 {
 486         int i;
 487         int block, block_count;
 488         int sector, offset;
 489         int mfr_id, dev_id;
 490         flash->start[0] = base;
 491         cfi_cmd(flash, 0xF0, 0x000);
 492         cfi_cmd(flash, 0xAA, 0x555);
 493         cfi_cmd(flash, 0x55, 0x2AA);
 494         cfi_cmd(flash, 0x90, 0x555);
 495         mfr_id = cfi_read_query(flash, 0x000);
 496         dev_id = cfi_read_query(flash, 0x0001);
 497         cfi_cmd(flash, 0xf0, 0x000);
 498
 499         for(i=0; i<sizeof(jedec_table)/sizeof(struct jedec_flash_info); i++) {
 500                 if((jedec_table[i].mfr_id == mfr_id) &&
 501                         (jedec_table[i].dev_id == dev_id)) {
 502
 503                         flash->flash_id = (mfr_id << 16) | dev_id;
 504                         flash->size = 1 << jedec_table[0].DevSize;
 505                         flash->size *= 4;
 506                         block_count = jedec_table[i].NumEraseRegions;
 507                         offset = 0;
 508                         flash->sector_count = 0;
 509                         for (block = 0; block < block_count; block++) {
 510                                 int sector_size = jedec_table[i].regions[block];
 511                                 int sector_count = (sector_size & 0xff) + 1;
 512                                 sector_size >>= 8;
 513                                 for (sector=0; sector<sector_count; sector++) {
 514                                         flash->start[flash->sector_count++] =
 515                                                 base + offset;
 516                                         offset += sector_size * 4;
 517                                 }
 518                         }
 519                         break;
 520                 }
 521         }
 522
 523         for (sector = 0; sector < flash->sector_count; sector++)
 524                 flash->protect[sector] = 0;
 525
 526         do_flash_erase = jedec_erase;
 527         write_dword = jedec_write_dword;
 528
 529         return flash->size;
 530 }
 531
 532 inline void mtibat1u(unsigned int x)
 533 {
 534         __asm__ __volatile__ ("mtspr   530, %0" :: "r" (x));
 535 }
 536
 537 inline void mtibat1l(unsigned int x)
 538 {
 539         __asm__ __volatile__ ("mtspr   531, %0" :: "r" (x));
 540 }
 541
 542 inline void mtdbat1u(unsigned int x)
 543 {
 544         __asm__ __volatile__ ("mtspr   538, %0" :: "r" (x));
 545 }
 546
 547 inline void mtdbat1l(unsigned int x)
 548 {
 549         __asm__ __volatile__ ("mtspr   539, %0" :: "r" (x));
 550 }
 551
 552 unsigned long flash_init (void)
 553 {
 554         unsigned long size = 0;
 555         int i;
 556         unsigned int msr;
 557
 558         /* BAT1 */
 559         CONFIG_WRITE_WORD(ERCR3, 0x0C00000C);
 560         CONFIG_WRITE_WORD(ERCR4, 0x0800000C);
 561         msr = get_msr();
 562         set_msr(msr & ~(MSR_IR | MSR_DR));
 563         mtibat1l(0x70000000 | BATL_PP_10 | BATL_CACHEINHIBIT);
 564         mtibat1u(0x70000000 | BATU_BL_256M | BATU_VS | BATU_VP);
 565         mtdbat1l(0x70000000 | BATL_PP_10 | BATL_CACHEINHIBIT);
 566         mtdbat1u(0x70000000 | BATU_BL_256M | BATU_VS | BATU_VP);
 567         set_msr(msr);
 568
 569         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++)
 570                 flash_info[i].flash_id = FLASH_UNKNOWN;
 571         size = cfi_init(FLASH_BASE0_PRELIM, &flash_info[0]);
 572         if (!size)
 573                 size = jedec_init(FLASH_BASE0_PRELIM, &flash_info[0]);
 574
 575         if (flash_info[0].flash_id == FLASH_UNKNOWN)
 576                 printf ("# Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n",
 577                         size, size<<20);
 578
 579         return size;
 580 }
 581
 582 void flash_print_info  (flash_info_t *flash)
 583 {
 584         int i;
 585         int k;
 586         int size;
 587         int erased;
 588         volatile unsigned long *p;
 589
 590         if (flash->flash_id == FLASH_UNKNOWN) {
 591                 printf ("missing or unknown FLASH type\n");
 592                 flash_init();
 593         }
 594
 595         if (flash->flash_id == FLASH_UNKNOWN) {
 596                 printf ("missing or unknown FLASH type\n");
 597                 return;
 598         }
 599
 600         switch (((flash->flash_id) >> 16) & 0xff) {
 601         case 0x01:
 602                 printf ("AMD ");
 603                 break;
 604         case 0x04:
 605                 printf("FUJITSU ");
 606                 break;
 607         case 0x20:
 608                 printf("STM ");
 609                 break;
 610         case 0xBF:
 611                 printf("SST ");
 612                 break;
 613         case 0x89:
 614         case 0xB0:
 615                 printf("INTEL ");
 616                 break;
 617         default:
 618                 printf ("Unknown Vendor ");
 619                 break;
 620         }
 621
 622         switch ((flash->flash_id) & 0xffff) {
 623         case (uint16_t)AMD_ID_LV800T:
 624                 printf ("AM29LV800T\n");
 625                 break;
 626         case (uint16_t)AMD_ID_LV800B:
 627                 printf ("AM29LV800B\n");
 628                 break;
 629         case (uint16_t)AMD_ID_LV160T:
 630                 printf ("AM29LV160T\n");
 631                 break;
 632         case (uint16_t)AMD_ID_LV160B:
 633                 printf ("AM29LV160B\n");
 634                 break;
 635         case (uint16_t)AMD_ID_LV320T:
 636                 printf ("AM29LV320T\n");
 637                 break;
 638         case (uint16_t)AMD_ID_LV320B:
 639                 printf ("AM29LV320B\n");
 640                 break;
 641         case (uint16_t)INTEL_ID_28F800C3T:
 642                 printf ("28F800C3T\n");
 643                 break;
 644         case (uint16_t)INTEL_ID_28F800C3B:
 645                 printf ("28F800C3B\n");
 646                 break;
 647         case (uint16_t)INTEL_ID_28F160C3T:
 648                 printf ("28F160C3T\n");
 649                 break;
 650         case (uint16_t)INTEL_ID_28F160C3B:
 651                 printf ("28F160C3B\n");
 652                 break;
 653         case (uint16_t)INTEL_ID_28F320C3T:
 654                 printf ("28F320C3T\n");
 655                 break;
 656         case (uint16_t)INTEL_ID_28F320C3B:
 657                 printf ("28F320C3B\n");
 658                 break;
 659         case (uint16_t)INTEL_ID_28F640C3T:
 660                 printf ("28F640C3T\n");
 661                 break;
 662         case (uint16_t)INTEL_ID_28F640C3B:
 663                 printf ("28F640C3B\n");
 664                 break;
 665         default:
 666                 printf ("Unknown Chip Type\n");
 667                 break;
 668         }
 669
 670         if (flash->size >= (1 << 20)) {
 671                 printf ("  Size: %ld MB in %d Sectors\n",
 672                                 flash->size >> 20, flash->sector_count);
 673         } else {
 674                 printf ("  Size: %ld kB in %d Sectors\n",
 675                                 flash->size >> 10, flash->sector_count);
 676         }
 677
 678         printf ("  Sector Start Addresses:");
 679         for (i = 0; i < flash->sector_count; ++i) {
 680                 /* Check if whole sector is erased*/
 681                 if (i != (flash->sector_count-1))
 682                         size = flash->start[i+1] - flash->start[i];
 683                 else
 684                         size = flash->start[0] + flash->size - flash->start[i];
 685
 686                 erased = 1;
 687                 p = (volatile unsigned long *)flash->start[i];
 688                 size = size >> 2;        /* divide by 4 for longword access */
 689                 for (k=0; k<size; k++) {
 690                         if (*p++ != 0xffffffff) {
 691                                 erased = 0;
 692                                 break;
 693                         }
 694                 }
 695
 696                 if ((i % 5) == 0)
 697                         printf ("\n   ");
 698
 699                 printf (" %08lX%s%s",
 700                         flash->start[i],
 701                         erased ? " E" : "  ",
 702                         flash->protect[i] ? "RO " : "   ");
 703         }
 704         printf ("\n");
 705 }