board/etin/debris/flash.c

   1 /*
   2  * board/eva/flash.c
   3  *
   4  * (C) Copyright 2002
   5  * Sangmoon Kim, Etin Systems, [email protected].
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <asm/processor.h>
  28 #include <asm/pci_io.h>
  29 #include <mpc824x.h>
  30
  31 int (*do_flash_erase)(flash_info_t*, uint32_t, uint32_t);
  32 int (*write_dword)(flash_info_t*, ulong, uint64_t);
  33
  34 typedef uint64_t cfi_word;
  35
  36 #define cfi_read(flash, addr) *((volatile cfi_word*)(flash->start[0] + addr))
  37
  38 #define cfi_write(flash, val, addr) \
  39         move64((cfi_word*)&val, \
  40                         (cfi_word*)(flash->start[0] + addr))
  41
  42 #define CMD(x) ((((cfi_word)x)<<48)|(((cfi_word)x)<<32)|(((cfi_word)x)<<16)|(((cfi_word)x)))
  43
  44 static void write32(unsigned long addr, uint32_t value)
  45 {
  46         *(volatile uint32_t*)(addr) = value;
  47         asm volatile("sync");
  48 }
  49
  50 static uint32_t read32(unsigned long addr)
  51 {
  52         uint32_t value;
  53         value = *(volatile uint32_t*)addr;
  54         asm volatile("sync");
  55         return value;
  56 }
  57
  58 static cfi_word cfi_cmd(flash_info_t *flash, uint8_t cmd, uint32_t addr)
  59 {
  60         uint32_t base = flash->start[0];
  61         uint32_t val=(cmd << 16) | cmd;
  62         addr <<= 3;
  63         write32(base + addr, val);
  64         return addr;
  65 }
  66
  67 static uint16_t cfi_read_query(flash_info_t *flash, uint32_t addr)
  68 {
  69         uint32_t base = flash->start[0];
  70         addr <<= 3;
  71         return (uint16_t)read32(base + addr);
  72 }
  73
  74 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  75
  76 static void move64(uint64_t *src, uint64_t *dest)
  77 {
  78         asm volatile("lfd  0, 0(3)\n\t" /* fpr0   =  *scr       */
  79          "stfd 0, 0(4)"         /* *dest  =  fpr0       */
  80          : : : "fr0" );         /* Clobbers fr0         */
  81         return;
  82 }
  83
  84 static int cfi_write_dword(flash_info_t *flash, ulong dest, cfi_word data)
  85 {
  86         unsigned long start;
  87         cfi_word status = 0;
  88
  89         status = cfi_read(flash, dest);
  90         data &= status;
  91
  92         cfi_cmd(flash, 0x40, 0);
  93         cfi_write(flash, data, dest);
  94
  95         udelay(10);
  96         start = get_timer (0);
  97         for(;;) {
  98                 status = cfi_read(flash, dest);
  99                 status &= CMD(0x80);
 100                 if(status == CMD(0x80))
 101                         break;
 102                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 103                         cfi_cmd(flash, 0xff, 0);
 104                         return 1;
 105                 }
 106                 udelay(1);
 107         }
 108         cfi_cmd(flash, 0xff, 0);
 109
 110         return 0;
 111 }
 112
 113 static int jedec_write_dword (flash_info_t *flash, ulong dest, cfi_word data)
 114 {
 115         ulong start;
 116         cfi_word status = 0;
 117
 118         status = cfi_read(flash, dest);
 119         if(status != CMD(0xffff)) return 2;
 120
 121         cfi_cmd(flash, 0xaa, 0x555);
 122         cfi_cmd(flash, 0x55, 0x2aa);
 123         cfi_cmd(flash, 0xa0, 0x555);
 124
 125         cfi_write(flash, data, dest);
 126
 127         udelay(10);
 128         start = get_timer (0);
 129         status = ~data;
 130         while(status != data) {
 131                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 132                         return 1;
 133                 status = cfi_read(flash, dest);
 134                 udelay(1);
 135         }
 136         return 0;
 137 }
 138
 139 static __inline__ unsigned long get_msr(void)
 140 {
 141         unsigned long msr;
 142         __asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
 143         return msr;
 144 }
 145
 146 static __inline__ void set_msr(unsigned long msr)
 147 {
 148         __asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
 149 }
 150
 151 int write_buff (flash_info_t *flash, uchar *src, ulong addr, ulong cnt)
 152 {
 153         ulong wp;
 154         int i, s, l, rc;
 155         cfi_word data;
 156         uint8_t *t = (uint8_t*)&data;
 157         unsigned long base = flash->start[0];
 158         uint32_t msr;
 159
 160         if (flash->flash_id == FLASH_UNKNOWN)
 161                 return 4;
 162
 163         if (cnt == 0)
 164                 return 0;
 165
 166         addr -= base;
 167
 168         msr = get_msr();
 169         set_msr(msr|MSR_FP);
 170
 171         wp = (addr & ~7);   /* get lower word aligned address */
 172
 173         if((addr-wp) != 0) {
 174                 data = cfi_read(flash, wp);
 175                 s = addr & 7;
 176                 l = ( cnt < (8-s) ) ? cnt : (8-s);
 177                 for(i = 0; i < l; i++)
 178                         t[s+i] = *src++;
 179                 if ((rc = write_dword(flash, wp, data)) != 0)
 180                         goto DONE;
 181                 wp += 8;
 182                 cnt -= l;
 183         }
 184
 185         while (cnt >= 8) {
 186                 for (i = 0; i < 8; i++)
 187                         t[i] = *src++;
 188                 if ((rc = write_dword(flash, wp, data)) != 0)
 189                         goto DONE;
 190                 wp  += 8;
 191                 cnt -= 8;
 192         }
 193
 194         if (cnt == 0) {
 195                 rc = 0;
 196                 goto DONE;
 197         }
 198
 199         data = cfi_read(flash, wp);
 200         for(i = 0; i < cnt; i++)
 201                 t[i] = *src++;
 202         rc = write_dword(flash, wp, data);
 203 DONE:
 204         set_msr(msr);
 205         return rc;
 206 }
 207
 208 static int cfi_erase_oneblock(flash_info_t *flash, uint32_t sect)
 209 {
 210         int sa;
 211         int flag;
 212         ulong start, last, now;
 213         cfi_word status;
 214
 215         flag = disable_interrupts();
 216
 217         sa = (flash->start[sect] - flash->start[0]);
 218         write32(flash->start[sect], 0x00200020);
 219         write32(flash->start[sect], 0x00d000d0);
 220
 221         if (flag)
 222                 enable_interrupts();
 223
 224         udelay(1000);
 225         start = get_timer (0);
 226         last  = start;
 227
 228         for (;;) {
 229                 status = cfi_read(flash, sa);
 230                 status &= CMD(0x80);
 231                 if (status == CMD(0x80))
 232                         break;
 233                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 234                         cfi_cmd(flash, 0xff, 0);
 235                         printf ("Timeout\n");
 236                         return ERR_TIMOUT;
 237                 }
 238
 239                 if ((now - last) > 1000) {
 240                         serial_putc ('.');
 241                         last = now;
 242                 }
 243                 udelay(10);
 244         }
 245         cfi_cmd(flash, 0xff, 0);
 246         return ERR_OK;
 247 }
 248
 249 static int cfi_erase(flash_info_t *flash, uint32_t s_first, uint32_t s_last)
 250 {
 251         int sect;
 252         int rc = ERR_OK;
 253
 254         for (sect = s_first; sect <= s_last; sect++) {
 255                 if (flash->protect[sect] == 0) {
 256                         rc = cfi_erase_oneblock(flash, sect);
 257                         if (rc != ERR_OK) break;
 258                 }
 259         }
 260         printf (" done\n");
 261         return rc;
 262 }
 263
 264 static int jedec_erase(flash_info_t *flash, uint32_t s_first, uint32_t s_last)
 265 {
 266         int sect;
 267         cfi_word status;
 268         int sa = -1;
 269         int flag;
 270         ulong start, last, now;
 271
 272         flag = disable_interrupts();
 273
 274         cfi_cmd(flash, 0xaa, 0x555);
 275         cfi_cmd(flash, 0x55, 0x2aa);
 276         cfi_cmd(flash, 0x80, 0x555);
 277         cfi_cmd(flash, 0xaa, 0x555);
 278         cfi_cmd(flash, 0x55, 0x2aa);
 279         for ( sect = s_first; sect <= s_last; sect++) {
 280                 if (flash->protect[sect] == 0) {
 281                         sa = flash->start[sect] - flash->start[0];
 282                         write32(flash->start[sect], 0x00300030);
 283                 }
 284         }
 285         if (flag)
 286                 enable_interrupts();
 287
 288         if (sa < 0)
 289                 goto DONE;
 290
 291         udelay (1000);
 292         start = get_timer (0);
 293         last  = start;
 294         for(;;) {
 295                 status = cfi_read(flash, sa);
 296                 if (status == CMD(0xffff))
 297                         break;
 298
 299                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 300                         printf ("Timeout\n");
 301                         return ERR_TIMOUT;
 302                 }
 303
 304                 if ((now - last) > 1000) {
 305                         serial_putc ('.');
 306                         last = now;
 307                 }
 308                 udelay(10);
 309         }
 310 DONE:
 311         cfi_cmd(flash, 0xf0, 0);
 312
 313         printf (" done\n");
 314
 315         return ERR_OK;
 316 }
 317
 318 int flash_erase (flash_info_t *flash, int s_first, int s_last)
 319 {
 320         int sect;
 321         int prot;
 322
 323         if ((s_first < 0) || (s_first > s_last)) {
 324                 if (flash->flash_id == FLASH_UNKNOWN)
 325                         printf ("- missing\n");
 326                 else
 327                         printf ("- no sectors to erase\n");
 328                 return ERR_NOT_ERASED;
 329         }
 330         if (flash->flash_id == FLASH_UNKNOWN) {
 331                 printf ("Can't erase unknown flash type - aborted\n");
 332                 return ERR_NOT_ERASED;
 333         }
 334
 335         prot = 0;
 336         for (sect = s_first; sect <= s_last; sect++)
 337                 if (flash->protect[sect]) prot++;
 338
 339         if (prot)
 340                 printf ("- Warning: %d protected sectors will not be erased!\n",
 341                                                                 prot);
 342         else
 343                 printf ("\n");
 344
 345         return do_flash_erase(flash, s_first, s_last);
 346 }
 347
 348 struct jedec_flash_info {
 349         const uint16_t mfr_id;
 350         const uint16_t dev_id;
 351         const char *name;
 352         const int DevSize;
 353         const int InterfaceDesc;
 354         const int NumEraseRegions;
 355         const ulong regions[4];
 356 };
 357
 358 #define ERASEINFO(size,blocks) (size<<8)|(blocks-1)
 359
 360 #define SIZE_1MiB 20
 361 #define SIZE_2MiB 21
 362 #define SIZE_4MiB 22
 363
 364 static const struct jedec_flash_info jedec_table[] = {
 365         {
 366                 mfr_id: (uint16_t)AMD_MANUFACT,
 367                 dev_id: (uint16_t)AMD_ID_LV800T,
 368                 name: "AMD AM29LV800T",
 369                 DevSize: SIZE_1MiB,
 370                 NumEraseRegions: 4,
 371                 regions: {ERASEINFO(0x10000,15),
 372                           ERASEINFO(0x08000,1),
 373                           ERASEINFO(0x02000,2),
 374                           ERASEINFO(0x04000,1)
 375                 }
 376         }, {
 377                 mfr_id: (uint16_t)AMD_MANUFACT,
 378                 dev_id: (uint16_t)AMD_ID_LV800B,
 379                 name: "AMD AM29LV800B",
 380                 DevSize: SIZE_1MiB,
 381                 NumEraseRegions: 4,
 382                 regions: {ERASEINFO(0x10000,15),
 383                           ERASEINFO(0x08000,1),
 384                           ERASEINFO(0x02000,2),
 385                           ERASEINFO(0x04000,1)
 386                 }
 387         }, {
 388                 mfr_id: (uint16_t)AMD_MANUFACT,
 389                 dev_id: (uint16_t)AMD_ID_LV160T,
 390                 name: "AMD AM29LV160T",
 391                 DevSize: SIZE_2MiB,
 392                 NumEraseRegions: 4,
 393                 regions: {ERASEINFO(0x10000,31),
 394                           ERASEINFO(0x08000,1),
 395                           ERASEINFO(0x02000,2),
 396                           ERASEINFO(0x04000,1)
 397                 }
 398         }, {
 399                 mfr_id: (uint16_t)AMD_MANUFACT,
 400                 dev_id: (uint16_t)AMD_ID_LV160B,
 401                 name: "AMD AM29LV160B",
 402                 DevSize: SIZE_2MiB,
 403                 NumEraseRegions: 4,
 404                 regions: {ERASEINFO(0x04000,1),
 405                           ERASEINFO(0x02000,2),
 406                           ERASEINFO(0x08000,1),
 407                           ERASEINFO(0x10000,31)
 408                 }
 409         }, {
 410                 mfr_id: (uint16_t)AMD_MANUFACT,
 411                 dev_id: (uint16_t)AMD_ID_LV320T,
 412                 name: "AMD AM29LV320T",
 413                 DevSize: SIZE_4MiB,
 414                 NumEraseRegions: 2,
 415                 regions: {ERASEINFO(0x10000,63),
 416                           ERASEINFO(0x02000,8)
 417                 }
 418
 419         }, {
 420                 mfr_id: (uint16_t)AMD_MANUFACT,
 421                 dev_id: (uint16_t)AMD_ID_LV320B,
 422                 name: "AMD AM29LV320B",
 423                 DevSize: SIZE_4MiB,
 424                 NumEraseRegions: 2,
 425                 regions: {ERASEINFO(0x02000,8),
 426                           ERASEINFO(0x10000,63)
 427                 }
 428         }
 429 };
 430
 431 static ulong cfi_init(uint32_t base,  flash_info_t *flash)
 432 {
 433         int sector;
 434         int block;
 435         int block_count;
 436         int offset = 0;
 437         int reverse = 0;
 438         int primary;
 439         int mfr_id;
 440         int dev_id;
 441
 442         flash->start[0] = base;
 443         cfi_cmd(flash, 0xF0, 0);
 444         cfi_cmd(flash, 0x98, 0);
 445         if ( !( cfi_read_query(flash, 0x10) == 'Q' &&
 446                 cfi_read_query(flash, 0x11) == 'R' &&
 447                 cfi_read_query(flash, 0x12) == 'Y' )) {
 448                 cfi_cmd(flash, 0xff, 0);
 449                 return 0;
 450         }
 451
 452         flash->size = 1 << cfi_read_query(flash, 0x27);
 453         flash->size *= 4;
 454         block_count = cfi_read_query(flash, 0x2c);
 455         primary = cfi_read_query(flash, 0x15);
 456         if ( cfi_read_query(flash, primary + 4) == 0x30)
 457                 reverse = (cfi_read_query(flash, 0x1) & 0x01);
 458         else
 459                 reverse = (cfi_read_query(flash, primary+15) == 3);
 460
 461         flash->sector_count = 0;
 462
 463         for ( block = reverse ? block_count - 1 : 0;
 464                       reverse ? block >= 0      : block < block_count;
 465                       reverse ? block--         : block ++) {
 466                 int sector_size =
 467                         (cfi_read_query(flash, 0x2d + block*4+2) |
 468                         (cfi_read_query(flash, 0x2d + block*4+3) << 8)) << 8;
 469                 int sector_count =
 470                         (cfi_read_query(flash, 0x2d + block*4+0) |
 471                         (cfi_read_query(flash, 0x2d + block*4+1) << 8)) + 1;
 472                 for(sector = 0; sector < sector_count; sector++) {
 473                         flash->start[flash->sector_count++] = base + offset;
 474                         offset += sector_size * 4;
 475                 }
 476         }
 477         mfr_id = cfi_read_query(flash, 0x00);
 478         dev_id = cfi_read_query(flash, 0x01);
 479
 480         cfi_cmd(flash, 0xff, 0);
 481
 482         flash->flash_id = (mfr_id << 16) | dev_id;
 483
 484         for (sector = 0; sector < flash->sector_count; sector++) {
 485                 write32(flash->start[sector], 0x00600060);
 486                 write32(flash->start[sector], 0x00d000d0);
 487         }
 488         cfi_cmd(flash, 0xff, 0);
 489
 490         for (sector = 0; sector < flash->sector_count; sector++)
 491                 flash->protect[sector] = 0;
 492
 493         do_flash_erase = cfi_erase;
 494         write_dword = cfi_write_dword;
 495
 496         return flash->size;
 497 }
 498
 499 static ulong jedec_init(unsigned long base, flash_info_t *flash)
 500 {
 501         int i;
 502         int block, block_count;
 503         int sector, offset;
 504         int mfr_id, dev_id;
 505         flash->start[0] = base;
 506         cfi_cmd(flash, 0xF0, 0x000);
 507         cfi_cmd(flash, 0xAA, 0x555);
 508         cfi_cmd(flash, 0x55, 0x2AA);
 509         cfi_cmd(flash, 0x90, 0x555);
 510         mfr_id = cfi_read_query(flash, 0x000);
 511         dev_id = cfi_read_query(flash, 0x0001);
 512         cfi_cmd(flash, 0xf0, 0x000);
 513
 514         for(i=0; i<sizeof(jedec_table)/sizeof(struct jedec_flash_info); i++) {
 515                 if((jedec_table[i].mfr_id == mfr_id) &&
 516                         (jedec_table[i].dev_id == dev_id)) {
 517
 518                         flash->flash_id = (mfr_id << 16) | dev_id;
 519                         flash->size = 1 << jedec_table[0].DevSize;
 520                         flash->size *= 4;
 521                         block_count = jedec_table[i].NumEraseRegions;
 522                         offset = 0;
 523                         flash->sector_count = 0;
 524                         for (block = 0; block < block_count; block++) {
 525                                 int sector_size = jedec_table[i].regions[block];
 526                                 int sector_count = (sector_size & 0xff) + 1;
 527                                 sector_size >>= 8;
 528                                 for (sector=0; sector<sector_count; sector++) {
 529                                         flash->start[flash->sector_count++] =
 530                                                 base + offset;
 531                                         offset += sector_size * 4;
 532                                 }
 533                         }
 534                         break;
 535                 }
 536         }
 537
 538         for (sector = 0; sector < flash->sector_count; sector++)
 539                 flash->protect[sector] = 0;
 540
 541         do_flash_erase = jedec_erase;
 542         write_dword = jedec_write_dword;
 543
 544         return flash->size;
 545 }
 546
 547 inline void mtibat1u(unsigned int x)
 548 {
 549         __asm__ __volatile__ ("mtspr   530, %0" :: "r" (x));
 550 }
 551
 552 inline void mtibat1l(unsigned int x)
 553 {
 554         __asm__ __volatile__ ("mtspr   531, %0" :: "r" (x));
 555 }
 556
 557 inline void mtdbat1u(unsigned int x)
 558 {
 559         __asm__ __volatile__ ("mtspr   538, %0" :: "r" (x));
 560 }
 561
 562 inline void mtdbat1l(unsigned int x)
 563 {
 564         __asm__ __volatile__ ("mtspr   539, %0" :: "r" (x));
 565 }
 566
 567 unsigned long flash_init (void)
 568 {
 569         unsigned long size = 0;
 570         int i;
 571         unsigned int msr;
 572
 573         /* BAT1 */
 574         CONFIG_WRITE_WORD(ERCR3, 0x0C00000C);
 575         CONFIG_WRITE_WORD(ERCR4, 0x0800000C);
 576         msr = get_msr();
 577         set_msr(msr & ~(MSR_IR | MSR_DR));
 578         mtibat1l(0x70000000 | BATL_PP_10 | BATL_CACHEINHIBIT);
 579         mtibat1u(0x70000000 | BATU_BL_256M | BATU_VS | BATU_VP);
 580         mtdbat1l(0x70000000 | BATL_PP_10 | BATL_CACHEINHIBIT);
 581         mtdbat1u(0x70000000 | BATU_BL_256M | BATU_VS | BATU_VP);
 582         set_msr(msr);
 583
 584         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++)
 585                 flash_info[i].flash_id = FLASH_UNKNOWN;
 586         size = cfi_init(FLASH_BASE0_PRELIM, &flash_info[0]);
 587         if (!size)
 588                 size = jedec_init(FLASH_BASE0_PRELIM, &flash_info[0]);
 589
 590         if (flash_info[0].flash_id == FLASH_UNKNOWN)
 591                 printf ("# Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n",
 592                         size, size<<20);
 593
 594         return size;
 595 }
 596
 597 void flash_print_info  (flash_info_t *flash)
 598 {
 599         int i;
 600         int k;
 601         int size;
 602         int erased;
 603         volatile unsigned long *p;
 604
 605         if (flash->flash_id == FLASH_UNKNOWN) {
 606                 printf ("missing or unknown FLASH type\n");
 607                 flash_init();
 608         }
 609
 610         if (flash->flash_id == FLASH_UNKNOWN) {
 611                 printf ("missing or unknown FLASH type\n");
 612                 return;
 613         }
 614
 615         switch (((flash->flash_id) >> 16) & 0xff) {
 616         case 0x01:
 617                 printf ("AMD ");
 618                 break;
 619         case 0x04:
 620                 printf("FUJITSU ");
 621                 break;
 622         case 0x20:
 623                 printf("STM ");
 624                 break;
 625         case 0xBF:
 626                 printf("SST ");
 627                 break;
 628         case 0x89:
 629         case 0xB0:
 630                 printf("INTEL ");
 631                 break;
 632         default:
 633                 printf ("Unknown Vendor ");
 634                 break;
 635         }
 636
 637         switch ((flash->flash_id) & 0xffff) {
 638         case (uint16_t)AMD_ID_LV800T:
 639                 printf ("AM29LV800T\n");
 640                 break;
 641         case (uint16_t)AMD_ID_LV800B:
 642                 printf ("AM29LV800B\n");
 643                 break;
 644         case (uint16_t)AMD_ID_LV160T:
 645                 printf ("AM29LV160T\n");
 646                 break;
 647         case (uint16_t)AMD_ID_LV160B:
 648                 printf ("AM29LV160B\n");
 649                 break;
 650         case (uint16_t)AMD_ID_LV320T:
 651                 printf ("AM29LV320T\n");
 652                 break;
 653         case (uint16_t)AMD_ID_LV320B:
 654                 printf ("AM29LV320B\n");
 655                 break;
 656         case (uint16_t)INTEL_ID_28F800C3T:
 657                 printf ("28F800C3T\n");
 658                 break;
 659         case (uint16_t)INTEL_ID_28F800C3B:
 660                 printf ("28F800C3B\n");
 661                 break;
 662         case (uint16_t)INTEL_ID_28F160C3T:
 663                 printf ("28F160C3T\n");
 664                 break;
 665         case (uint16_t)INTEL_ID_28F160C3B:
 666                 printf ("28F160C3B\n");
 667                 break;
 668         case (uint16_t)INTEL_ID_28F320C3T:
 669                 printf ("28F320C3T\n");
 670                 break;
 671         case (uint16_t)INTEL_ID_28F320C3B:
 672                 printf ("28F320C3B\n");
 673                 break;
 674         case (uint16_t)INTEL_ID_28F640C3T:
 675                 printf ("28F640C3T\n");
 676                 break;
 677         case (uint16_t)INTEL_ID_28F640C3B:
 678                 printf ("28F640C3B\n");
 679                 break;
 680         default:
 681                 printf ("Unknown Chip Type\n");
 682                 break;
 683         }
 684
 685         if (flash->size >= (1 << 20)) {
 686                 printf ("  Size: %ld MB in %d Sectors\n",
 687                                 flash->size >> 20, flash->sector_count);
 688         } else {
 689                 printf ("  Size: %ld kB in %d Sectors\n",
 690                                 flash->size >> 10, flash->sector_count);
 691         }
 692
 693         printf ("  Sector Start Addresses:");
 694         for (i = 0; i < flash->sector_count; ++i) {
 695                 /* Check if whole sector is erased*/
 696                 if (i != (flash->sector_count-1))
 697                         size = flash->start[i+1] - flash->start[i];
 698                 else
 699                         size = flash->start[0] + flash->size - flash->start[i];
 700
 701                 erased = 1;
 702                 p = (volatile unsigned long *)flash->start[i];
 703                 size = size >> 2;        /* divide by 4 for longword access */
 704                 for (k=0; k<size; k++) {
 705                         if (*p++ != 0xffffffff) {
 706                                 erased = 0;
 707                                 break;
 708                         }
 709                 }
 710
 711                 if ((i % 5) == 0)
 712                         printf ("\n   ");
 713
 714                 printf (" %08lX%s%s",
 715                         flash->start[i],
 716                         erased ? " E" : "  ",
 717                         flash->protect[i] ? "RO " : "   ");
 718         }
 719         printf ("\n");
 720 }