board/tqc/tqm5200/cam5200_flash.c

   1 /*
   2  * (C) Copyright 2006
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <mpc5xxx.h>
  26 #include <asm/processor.h>
  27
  28 #if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH)
  29
  30 #if 0
  31 #define DEBUGF(x...) printf(x)
  32 #else
  33 #define DEBUGF(x...)
  34 #endif
  35
  36 #define swap16(x) __swab16(x)
  37
  38 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips */
  39
  40 /*
  41  * CAM5200 is a TQM5200B based board. Additionally it also features
  42  * a NIOS cpu. The NIOS CPU peripherals are accessible through MPC5xxx
  43  * Local Bus on CS5. This includes 32 bit wide RAM and SRAM as well as
  44  * 16 bit wide flash device. Big Endian order on a 32 bit CS5 makes
  45  * access to flash chip slightly more complicated as additional byte
  46  * swapping is necessary within each 16 bit wide flash 'word'.
  47  *
  48  * This driver's task is to handle both flash devices: 32 bit TQM5200B
  49  * flash chip and 16 bit NIOS cpu flash chip. In the below
  50  * flash_addr_table table we use least significant address bit to mark
  51  * 16 bit flash bank and two sets of routines *_32 and *_16 to handle
  52  * specifics of both flashes.
  53  */
  54 static unsigned long flash_addr_table[][CONFIG_SYS_MAX_FLASH_BANKS] = {
  55         {CONFIG_SYS_BOOTCS_START, CONFIG_SYS_CS5_START | 1}
  56 };
  57
  58 /*-----------------------------------------------------------------------
  59  * Functions
  60  */
  61 static int write_word(flash_info_t * info, ulong dest, ulong data);
  62 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
  63 static int write_word_32(flash_info_t * info, ulong dest, ulong data);
  64 static int write_word_16(flash_info_t * info, ulong dest, ulong data);
  65 static int flash_erase_32(flash_info_t * info, int s_first, int s_last);
  66 static int flash_erase_16(flash_info_t * info, int s_first, int s_last);
  67 static ulong flash_get_size_32(vu_long * addr, flash_info_t * info);
  68 static ulong flash_get_size_16(vu_long * addr, flash_info_t * info);
  69 #endif
  70
  71 void flash_print_info(flash_info_t * info)
  72 {
  73         int i, k;
  74         int size, erased;
  75         volatile unsigned long *flash;
  76
  77         if (info->flash_id == FLASH_UNKNOWN) {
  78                 printf("missing or unknown FLASH type\n");
  79                 return;
  80         }
  81
  82         switch (info->flash_id & FLASH_VENDMASK) {
  83                 case FLASH_MAN_AMD:
  84                         printf("AMD ");
  85                         break;
  86                 case FLASH_MAN_FUJ:
  87                         printf("FUJITSU ");
  88                         break;
  89                 default:
  90                         printf("Unknown Vendor ");
  91                         break;
  92         }
  93
  94         switch (info->flash_id & FLASH_TYPEMASK) {
  95                 case FLASH_S29GL128N:
  96                         printf ("S29GL128N (256 Mbit, uniform sector size)\n");
  97                         break;
  98                 case FLASH_AM320B:
  99                         printf ("29LV320B (32 Mbit, bottom boot sect)\n");
 100                         break;
 101                 case FLASH_AM320T:
 102                         printf ("29LV320T (32 Mbit, top boot sect)\n");
 103                         break;
 104                 default:
 105                         printf("Unknown Chip Type\n");
 106                         break;
 107         }
 108
 109         printf("  Size: %ld KB in %d Sectors\n",
 110                         info->size >> 10, info->sector_count);
 111
 112         printf("  Sector Start Addresses:");
 113         for (i = 0; i < info->sector_count; ++i) {
 114                 /*
 115                  * Check if whole sector is erased
 116                  */
 117                 if (i != (info->sector_count - 1))
 118                         size = info->start[i + 1] - info->start[i];
 119                 else
 120                         size = info->start[0] + info->size - info->start[i];
 121
 122                 erased = 1;
 123                 flash = (volatile unsigned long *)info->start[i];
 124                 size = size >> 2;       /* divide by 4 for longword access */
 125
 126                 for (k = 0; k < size; k++) {
 127                         if (*flash++ != 0xffffffff) {
 128                                 erased = 0;
 129                                 break;
 130                         }
 131                 }
 132
 133                 if ((i % 5) == 0)
 134                         printf("\n   ");
 135
 136                 printf(" %08lX%s%s", info->start[i],
 137                                 erased ? " E" : "  ",
 138                                 info->protect[i] ? "RO " : "   ");
 139         }
 140         printf("\n");
 141         return;
 142 }
 143
 144
 145 /*
 146  * The following code cannot be run from FLASH!
 147  */
 148 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
 149 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 150 {
 151
 152         DEBUGF("get_size: FLASH ADDR %08lx\n", addr);
 153
 154         /* bit 0 used for big flash marking */
 155         if ((ulong)addr & 0x1)
 156                 return flash_get_size_16((vu_long *)((ulong)addr & 0xfffffffe), info);
 157         else
 158                 return flash_get_size_32(addr, info);
 159 }
 160
 161 static ulong flash_get_size_32(vu_long * addr, flash_info_t * info)
 162 #else
 163 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 164 #endif
 165 {
 166         short i;
 167         CONFIG_SYS_FLASH_WORD_SIZE value;
 168         ulong base = (ulong) addr;
 169         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) addr;
 170
 171         DEBUGF("get_size32: FLASH ADDR: %08x\n", (unsigned)addr);
 172
 173         /* Write auto select command: read Manufacturer ID */
 174         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00AA00AA;
 175         addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00550055;
 176         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00900090;
 177         udelay(1000);
 178
 179         value = addr2[0];
 180         DEBUGF("FLASH MANUFACT: %x\n", value);
 181
 182         switch (value) {
 183                 case (CONFIG_SYS_FLASH_WORD_SIZE) AMD_MANUFACT:
 184                         info->flash_id = FLASH_MAN_AMD;
 185                         break;
 186                 default:
 187                         info->flash_id = FLASH_UNKNOWN;
 188                         info->sector_count = 0;
 189                         info->size = 0;
 190                         return (0);     /* no or unknown flash  */
 191         }
 192
 193         value = addr2[1];       /* device ID            */
 194         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 195
 196         switch (value) {
 197                 case AMD_ID_MIRROR:
 198                         DEBUGF("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 199                                         addr[14], addr[15]);
 200                         switch(addr[14]) {
 201                                 case AMD_ID_GL128N_2:
 202                                         if (addr[15] != AMD_ID_GL128N_3) {
 203                                                 DEBUGF("Chip: S29GL128N -> unknown\n");
 204                                                 info->flash_id = FLASH_UNKNOWN;
 205                                         } else {
 206                                                 DEBUGF("Chip: S29GL128N\n");
 207                                                 info->flash_id += FLASH_S29GL128N;
 208                                                 info->sector_count = 128;
 209                                                 info->size = 0x02000000;
 210                                         }
 211                                         break;
 212                                 default:
 213                                         info->flash_id = FLASH_UNKNOWN;
 214                                         return(0);
 215                         }
 216                         break;
 217
 218                 default:
 219                         info->flash_id = FLASH_UNKNOWN;
 220                         return (0);     /* => no or unknown flash */
 221         }
 222
 223         /* set up sector start address table */
 224         for (i = 0; i < info->sector_count; i++)
 225                 info->start[i] = base + (i * 0x00040000);
 226
 227         /* check for protected sectors */
 228         for (i = 0; i < info->sector_count; i++) {
 229                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 230                 /* D0 = 1 if protected */
 231                 addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
 232
 233                 info->protect[i] = addr2[2] & 1;
 234         }
 235
 236         /* issue bank reset to return to read mode */
 237         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00F000F0;
 238
 239         return (info->size);
 240 }
 241
 242 static int wait_for_DQ7_32(flash_info_t * info, int sect)
 243 {
 244         ulong start, now, last;
 245         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr =
 246                 (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]);
 247
 248         start = get_timer(0);
 249         last = start;
 250         while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080) !=
 251                         (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080) {
 252                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 253                         printf("Timeout\n");
 254                         return -1;
 255                 }
 256                 /* show that we're waiting */
 257                 if ((now - last) > 1000) {      /* every second */
 258                         putc('.');
 259                         last = now;
 260                 }
 261         }
 262         return 0;
 263 }
 264
 265 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
 266 int flash_erase(flash_info_t * info, int s_first, int s_last)
 267 {
 268         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
 269                 return flash_erase_16(info, s_first, s_last);
 270         } else {
 271                 return flash_erase_32(info, s_first, s_last);
 272         }
 273 }
 274
 275 static int flash_erase_32(flash_info_t * info, int s_first, int s_last)
 276 #else
 277 int flash_erase(flash_info_t * info, int s_first, int s_last)
 278 #endif
 279 {
 280         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]);
 281         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
 282         int flag, prot, sect;
 283
 284         if ((s_first < 0) || (s_first > s_last)) {
 285                 if (info->flash_id == FLASH_UNKNOWN)
 286                         printf("- missing\n");
 287                 else
 288                         printf("- no sectors to erase\n");
 289                 return 1;
 290         }
 291
 292         if (info->flash_id == FLASH_UNKNOWN) {
 293                 printf("Can't erase unknown flash type - aborted\n");
 294                 return 1;
 295         }
 296
 297         prot = 0;
 298         for (sect = s_first; sect <= s_last; ++sect) {
 299                 if (info->protect[sect])
 300                         prot++;
 301         }
 302
 303         if (prot)
 304                 printf("- Warning: %d protected sectors will not be erased!", prot);
 305
 306         printf("\n");
 307
 308         /* Disable interrupts which might cause a timeout here */
 309         flag = disable_interrupts();
 310
 311         /* Start erase on unprotected sectors */
 312         for (sect = s_first; sect <= s_last; sect++) {
 313                 if (info->protect[sect] == 0) { /* not protected */
 314                         addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]);
 315
 316                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00AA00AA;
 317                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00550055;
 318                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080;
 319                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00AA00AA;
 320                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00550055;
 321                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00300030;     /* sector erase */
 322
 323                         /*
 324                          * Wait for each sector to complete, it's more
 325                          * reliable.  According to AMD Spec, you must
 326                          * issue all erase commands within a specified
 327                          * timeout.  This has been seen to fail, especially
 328                          * if printf()s are included (for debug)!!
 329                          */
 330                         wait_for_DQ7_32(info, sect);
 331                 }
 332         }
 333
 334         /* re-enable interrupts if necessary */
 335         if (flag)
 336                 enable_interrupts();
 337
 338         /* wait at least 80us - let's wait 1 ms */
 339         udelay(1000);
 340
 341         /* reset to read mode */
 342         addr = (CONFIG_SYS_FLASH_WORD_SIZE *) info->start[0];
 343         addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00F000F0;      /* reset bank */
 344
 345         printf(" done\n");
 346         return 0;
 347 }
 348
 349 /*-----------------------------------------------------------------------
 350  * Copy memory to flash, returns:
 351  * 0 - OK
 352  * 1 - write timeout
 353  * 2 - Flash not erased
 354  */
 355 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 356 {
 357         ulong cp, wp, data;
 358         int i, l, rc;
 359
 360         wp = (addr & ~3);       /* get lower word aligned address */
 361
 362         /*
 363          * handle unaligned start bytes
 364          */
 365         if ((l = addr - wp) != 0) {
 366                 data = 0;
 367                 for (i = 0, cp = wp; i < l; ++i, ++cp)
 368                         data = (data << 8) | (*(uchar *) cp);
 369
 370                 for (; i < 4 && cnt > 0; ++i) {
 371                         data = (data << 8) | *src++;
 372                         --cnt;
 373                         ++cp;
 374                 }
 375
 376                 for (; cnt == 0 && i < 4; ++i, ++cp)
 377                         data = (data << 8) | (*(uchar *) cp);
 378
 379                 if ((rc = write_word(info, wp, data)) != 0)
 380                         return (rc);
 381
 382                 wp += 4;
 383         }
 384
 385         /*
 386          * handle word aligned part
 387          */
 388         while (cnt >= 4) {
 389                 data = 0;
 390                 for (i = 0; i < 4; ++i)
 391                         data = (data << 8) | *src++;
 392
 393                 if ((rc = write_word(info, wp, data)) != 0)
 394                         return (rc);
 395
 396                 wp += 4;
 397                 cnt -= 4;
 398         }
 399
 400         if (cnt == 0)
 401                 return (0);
 402
 403         /*
 404          * handle unaligned tail bytes
 405          */
 406         data = 0;
 407         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 408                 data = (data << 8) | *src++;
 409                 --cnt;
 410         }
 411         for (; i < 4; ++i, ++cp)
 412                 data = (data << 8) | (*(uchar *) cp);
 413
 414         return (write_word(info, wp, data));
 415 }
 416
 417 /*-----------------------------------------------------------------------
 418  * Copy memory to flash, returns:
 419  * 0 - OK
 420  * 1 - write timeout
 421  * 2 - Flash not erased
 422  */
 423 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
 424 static int write_word(flash_info_t * info, ulong dest, ulong data)
 425 {
 426         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) {
 427                 return write_word_16(info, dest, data);
 428         } else {
 429                 return write_word_32(info, dest, data);
 430         }
 431 }
 432
 433 static int write_word_32(flash_info_t * info, ulong dest, ulong data)
 434 #else
 435 static int write_word(flash_info_t * info, ulong dest, ulong data)
 436 #endif
 437 {
 438         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]);
 439         volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *) dest;
 440         ulong *datap = &data;
 441         volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 =
 442                         (volatile CONFIG_SYS_FLASH_WORD_SIZE *)datap;
 443         ulong start;
 444         int i, flag;
 445
 446         /* Check if Flash is (sufficiently) erased */
 447         if ((*((vu_long *)dest) & data) != data)
 448                 return (2);
 449
 450         for (i = 0; i < 4 / sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
 451                 /* Disable interrupts which might cause a timeout here */
 452                 flag = disable_interrupts();
 453
 454                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00AA00AA;
 455                 addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00550055;
 456                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x00A000A0;
 457
 458                 dest2[i] = data2[i];
 459
 460                 /* re-enable interrupts if necessary */
 461                 if (flag)
 462                         enable_interrupts();
 463
 464                 /* data polling for D7 */
 465                 start = get_timer(0);
 466                 while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080) !=
 467                                 (data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x00800080)) {
 468
 469                         if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 470                                 return (1);
 471                 }
 472         }
 473
 474         return (0);
 475 }
 476
 477 #ifdef CONFIG_SYS_FLASH_2ND_16BIT_DEV
 478
 479 #undef  CONFIG_SYS_FLASH_WORD_SIZE
 480 #define CONFIG_SYS_FLASH_WORD_SIZE unsigned short
 481
 482 /*
 483  * The following code cannot be run from FLASH!
 484  */
 485 static ulong flash_get_size_16(vu_long * addr, flash_info_t * info)
 486 {
 487         short i;
 488         CONFIG_SYS_FLASH_WORD_SIZE value;
 489         ulong base = (ulong) addr;
 490         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) addr;
 491
 492         DEBUGF("get_size16: FLASH ADDR: %08x\n", (unsigned)addr);
 493
 494         /* issue bank reset to return to read mode */
 495         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xF000F000;
 496
 497         /* Write auto select command: read Manufacturer ID */
 498         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xAA00AA00;
 499         addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x55005500;
 500         addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x90009000;
 501         udelay(1000);
 502
 503         value = swap16(addr2[0]);
 504         DEBUGF("FLASH MANUFACT: %x\n", value);
 505
 506         switch (value) {
 507                 case (CONFIG_SYS_FLASH_WORD_SIZE) AMD_MANUFACT:
 508                         info->flash_id = FLASH_MAN_AMD;
 509                         break;
 510                 case (CONFIG_SYS_FLASH_WORD_SIZE) FUJ_MANUFACT:
 511                         info->flash_id = FLASH_MAN_FUJ;
 512                         break;
 513                 default:
 514                         info->flash_id = FLASH_UNKNOWN;
 515                         info->sector_count = 0;
 516                         info->size = 0;
 517                         return (0);     /* no or unknown flash  */
 518         }
 519
 520         value = swap16(addr2[1]);       /* device ID            */
 521         DEBUGF("\nFLASH DEVICEID: %x\n", value);
 522
 523         switch (value) {
 524                 case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
 525                         info->flash_id += FLASH_AM320B;
 526                         info->sector_count = 71;
 527                         info->size = 0x00400000;
 528                         break;  /* => 4 MB      */
 529                 case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
 530                         info->flash_id += FLASH_AM320T;
 531                         info->sector_count = 71;
 532                         info->size = 0x00400000;
 533                         break;  /* => 4 MB      */
 534                 default:
 535                         info->flash_id = FLASH_UNKNOWN;
 536                         return (0);     /* => no or unknown flash */
 537         }
 538
 539         if (info->flash_id & FLASH_BTYPE) {
 540                 /* set sector offsets for bottom boot block type        */
 541                 info->start[0] = base + 0x00000000;
 542                 info->start[1] = base + 0x00002000;
 543                 info->start[2] = base + 0x00004000;
 544                 info->start[3] = base + 0x00006000;
 545                 info->start[4] = base + 0x00008000;
 546                 info->start[5] = base + 0x0000a000;
 547                 info->start[6] = base + 0x0000c000;
 548                 info->start[7] = base + 0x0000e000;
 549
 550                 for (i = 8; i < info->sector_count; i++)
 551                         info->start[i] = base + (i * 0x00010000) - 0x00070000;
 552         } else {
 553                 /* set sector offsets for top boot block type           */
 554                 i = info->sector_count - 1;
 555                 info->start[i--] = base + info->size - 0x00002000;
 556                 info->start[i--] = base + info->size - 0x00004000;
 557                 info->start[i--] = base + info->size - 0x00006000;
 558                 info->start[i--] = base + info->size - 0x00008000;
 559                 info->start[i--] = base + info->size - 0x0000a000;
 560                 info->start[i--] = base + info->size - 0x0000c000;
 561                 info->start[i--] = base + info->size - 0x0000e000;
 562
 563                 for (; i >= 0; i--)
 564                         info->start[i] = base + i * 0x00010000;
 565         }
 566
 567         /* check for protected sectors */
 568         for (i = 0; i < info->sector_count; i++) {
 569                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 570                 /* D0 = 1 if protected */
 571                 addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
 572
 573                 info->protect[i] = addr2[2] & 1;
 574         }
 575
 576         /* issue bank reset to return to read mode */
 577         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xF000F000;
 578
 579         return (info->size);
 580 }
 581
 582 static int wait_for_DQ7_16(flash_info_t * info, int sect)
 583 {
 584         ulong start, now, last;
 585         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr =
 586                 (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]);
 587
 588         start = get_timer(0);
 589         last = start;
 590         while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000) !=
 591                         (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000) {
 592                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 593                         printf("Timeout\n");
 594                         return -1;
 595                 }
 596                 /* show that we're waiting */
 597                 if ((now - last) > 1000) {      /* every second */
 598                         putc('.');
 599                         last = now;
 600                 }
 601         }
 602         return 0;
 603 }
 604
 605 static int flash_erase_16(flash_info_t * info, int s_first, int s_last)
 606 {
 607         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]);
 608         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
 609         int flag, prot, sect;
 610
 611         if ((s_first < 0) || (s_first > s_last)) {
 612                 if (info->flash_id == FLASH_UNKNOWN)
 613                         printf("- missing\n");
 614                 else
 615                         printf("- no sectors to erase\n");
 616                 return 1;
 617         }
 618
 619         if (info->flash_id == FLASH_UNKNOWN) {
 620                 printf("Can't erase unknown flash type - aborted\n");
 621                 return 1;
 622         }
 623
 624         prot = 0;
 625         for (sect = s_first; sect <= s_last; ++sect) {
 626                 if (info->protect[sect])
 627                         prot++;
 628         }
 629
 630         if (prot)
 631                 printf("- Warning: %d protected sectors will not be erased!",   prot);
 632
 633         printf("\n");
 634
 635         /* Disable interrupts which might cause a timeout here */
 636         flag = disable_interrupts();
 637
 638         /* Start erase on unprotected sectors */
 639         for (sect = s_first; sect <= s_last; sect++) {
 640                 if (info->protect[sect] == 0) { /* not protected */
 641                         addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[sect]);
 642
 643                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xAA00AA00;
 644                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x55005500;
 645                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000;
 646                         addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xAA00AA00;
 647                         addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x55005500;
 648                         addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x30003000;     /* sector erase */
 649
 650                         /*
 651                          * Wait for each sector to complete, it's more
 652                          * reliable.  According to AMD Spec, you must
 653                          * issue all erase commands within a specified
 654                          * timeout.  This has been seen to fail, especially
 655                          * if printf()s are included (for debug)!!
 656                          */
 657                         wait_for_DQ7_16(info, sect);
 658                 }
 659         }
 660
 661         /* re-enable interrupts if necessary */
 662         if (flag)
 663                 enable_interrupts();
 664
 665         /* wait at least 80us - let's wait 1 ms */
 666         udelay(1000);
 667
 668         /* reset to read mode */
 669         addr = (CONFIG_SYS_FLASH_WORD_SIZE *) info->start[0];
 670         addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xF000F000;      /* reset bank */
 671
 672         printf(" done\n");
 673         return 0;
 674 }
 675
 676 static int write_word_16(flash_info_t * info, ulong dest, ulong data)
 677 {
 678         volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *) (info->start[0]);
 679         volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *) dest;
 680         ulong *datap = &data;
 681         volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 =
 682                         (volatile CONFIG_SYS_FLASH_WORD_SIZE *)datap;
 683         ulong start;
 684         int i;
 685
 686         /* Check if Flash is (sufficiently) erased */
 687         for (i = 0; i < 4 / sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
 688                 if ((dest2[i] & swap16(data2[i])) != swap16(data2[i]))
 689                         return (2);
 690         }
 691
 692         for (i = 0; i < 4 / sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++) {
 693                 int flag;
 694
 695                 /* Disable interrupts which might cause a timeout here */
 696                 flag = disable_interrupts();
 697
 698                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xAA00AA00;
 699                 addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE) 0x55005500;
 700                 addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE) 0xA000A000;
 701
 702                 dest2[i] = swap16(data2[i]);
 703
 704                 /* re-enable interrupts if necessary */
 705                 if (flag)
 706                         enable_interrupts();
 707
 708                 /* data polling for D7 */
 709                 start = get_timer(0);
 710                 while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000) !=
 711                                 (swap16(data2[i]) & (CONFIG_SYS_FLASH_WORD_SIZE) 0x80008000)) {
 712
 713                         if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 714                                 return (1);
 715                         }
 716                 }
 717         }
 718
 719         return (0);
 720 }
 721 #endif /* CONFIG_SYS_FLASH_2ND_16BIT_DEV */
 722
 723 /*-----------------------------------------------------------------------
 724  * Functions
 725  */
 726 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
 727 static int write_word(flash_info_t * info, ulong dest, ulong data);
 728
 729 /*-----------------------------------------------------------------------
 730  */
 731
 732 unsigned long flash_init(void)
 733 {
 734         unsigned long total_b = 0;
 735         unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
 736         unsigned short index = 0;
 737         int i;
 738
 739         DEBUGF("\n");
 740         DEBUGF("FLASH: Index: %d\n", index);
 741
 742         /* Init: no FLASHes known */
 743         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 744                 flash_info[i].flash_id = FLASH_UNKNOWN;
 745                 flash_info[i].sector_count = -1;
 746                 flash_info[i].size = 0;
 747
 748                 /* check whether the address is 0 */
 749                 if (flash_addr_table[index][i] == 0)
 750                         continue;
 751
 752                 /* call flash_get_size() to initialize sector address */
 753                 size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
 754                                 &flash_info[i]);
 755
 756                 flash_info[i].size = size_b[i];
 757
 758                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 759                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 760                                         i+1, size_b[i], size_b[i] << 20);
 761                         flash_info[i].sector_count = -1;
 762                         flash_info[i].size = 0;
 763                 }
 764
 765                 /* Monitor protection ON by default */
 766                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 767                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 768                                     &flash_info[i]);
 769 #if defined(CONFIG_ENV_IS_IN_FLASH)
 770                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 771                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 772                                     &flash_info[i]);
 773 #if defined(CONFIG_ENV_ADDR_REDUND)
 774                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 775                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 776                                     &flash_info[i]);
 777 #endif
 778 #endif
 779                 total_b += flash_info[i].size;
 780         }
 781
 782         return total_b;
 783 }
 784 #endif /* if defined(CONFIG_CAM5200) && defined(CONFIG_CAM5200_NIOSFLASH) */