board/cogent/flash.c

   1 /*
   2  * (C) Copyright 2000
   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 <board/cogent/flash.h>
  26
  27 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  28
  29 #if defined(CONFIG_ENV_IS_IN_FLASH)
  30 # ifndef  CONFIG_ENV_ADDR
  31 #  define CONFIG_ENV_ADDR       (CFG_FLASH_BASE + CONFIG_ENV_OFFSET)
  32 # endif
  33 # ifndef  CONFIG_ENV_SIZE
  34 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  35 # endif
  36 # ifndef  CONFIG_ENV_SECT_SIZE
  37 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  38 # endif
  39 #endif
  40
  41 /*-----------------------------------------------------------------------
  42  * Functions
  43  */
  44 static int write_word (flash_info_t *info, ulong dest, ulong data);
  45
  46 /*-----------------------------------------------------------------------
  47  */
  48
  49
  50 #if defined(CONFIG_CMA302)
  51
  52 /*
  53  * probe for the existence of flash at address "addr"
  54  * 0 = yes, 1 = bad Manufacturer's Id, 2 = bad Device Id
  55  */
  56 static int
  57 c302f_probe_word(c302f_addr_t addr)
  58 {
  59         /* reset the flash */
  60         *addr = C302F_BNK_CMD_RST;
  61
  62         /* check the manufacturer id */
  63         *addr = C302F_BNK_CMD_RD_ID;
  64         if (*C302F_BNK_ADDR_MAN(addr) != C302F_BNK_RD_ID_MAN)
  65                 return 1;
  66
  67         /* check the device id */
  68         *addr = C302F_BNK_CMD_RD_ID;
  69         if (*C302F_BNK_ADDR_DEV(addr) != C302F_BNK_RD_ID_DEV)
  70                 return 2;
  71
  72 #ifdef FLASH_DEBUG
  73         {
  74                 int i;
  75
  76                 printf("\nMaster Lock Config = 0x%08lx\n",
  77                         *C302F_BNK_ADDR_CFGM(addr));
  78                 for (i = 0; i < C302F_BNK_NBLOCKS; i++)
  79                         printf("Block %2d Lock Config = 0x%08lx\n",
  80                                 i, *C302F_BNK_ADDR_CFG(i, addr));
  81         }
  82 #endif
  83
  84         /* reset the flash again */
  85         *addr = C302F_BNK_CMD_RST;
  86
  87         return 0;
  88 }
  89
  90 /*
  91  * probe for Cogent CMA302 flash module at address "base" and store
  92  * info for any found into flash_info entry "fip". Must find at least
  93  * one bank.
  94  */
  95 static void
  96 c302f_probe(flash_info_t *fip, c302f_addr_t base)
  97 {
  98         c302f_addr_t addr, eaddr;
  99         int nbanks;
 100
 101         fip->size = 0L;
 102         fip->sector_count = 0;
 103
 104         addr = base;
 105         eaddr = C302F_BNK_ADDR_BASE(addr, C302F_MAX_BANKS);
 106         nbanks = 0;
 107
 108         while (addr < eaddr) {
 109                 c302f_addr_t addrw, eaddrw, addrb;
 110                 int i, osc, nsc;
 111
 112                 addrw = addr;
 113                 eaddrw = C302F_BNK_ADDR_NEXT_WORD(addrw);
 114
 115                 while (addrw < eaddrw)
 116                         if (c302f_probe_word(addrw++) != 0)
 117                                 goto out;
 118
 119                 /* bank exists - append info for this bank to *fip */
 120                 fip->flash_id = FLASH_MAN_INTEL|FLASH_28F008S5;
 121                 fip->size += C302F_BNK_SIZE;
 122                 osc = fip->sector_count;
 123                 fip->sector_count += C302F_BNK_NBLOCKS;
 124                 if ((nsc = fip->sector_count) >= CFG_MAX_FLASH_SECT)
 125                         panic("Too many sectors in flash at address 0x%08lx\n",
 126                                 (unsigned long)base);
 127
 128                 addrb = addr;
 129                 for (i = osc; i < nsc; i++) {
 130                         fip->start[i] = (ulong)addrb;
 131                         fip->protect[i] = 0;
 132                         addrb = C302F_BNK_ADDR_NEXT_BLK(addrb);
 133                 }
 134
 135                 addr = C302F_BNK_ADDR_NEXT_BNK(addr);
 136                 nbanks++;
 137         }
 138
 139 out:
 140         if (nbanks == 0)
 141                 panic("ERROR: no flash found at address 0x%08lx\n",
 142                         (unsigned long)base);
 143 }
 144
 145 static void
 146 c302f_reset(flash_info_t *info, int sect)
 147 {
 148         c302f_addr_t addrw, eaddrw;
 149
 150         addrw = (c302f_addr_t)info->start[sect];
 151         eaddrw = C302F_BNK_ADDR_NEXT_WORD(addrw);
 152
 153         while (addrw < eaddrw) {
 154 #ifdef FLASH_DEBUG
 155                 printf("  writing reset cmd to addr 0x%08lx\n",
 156                         (unsigned long)addrw);
 157 #endif
 158                 *addrw = C302F_BNK_CMD_RST;
 159                 addrw++;
 160         }
 161 }
 162
 163 static void
 164 c302f_erase_init(flash_info_t *info, int sect)
 165 {
 166         c302f_addr_t addrw, saddrw, eaddrw;
 167         int flag;
 168
 169 #ifdef FLASH_DEBUG
 170         printf("0x%08lx C302F_BNK_CMD_PROG\n", C302F_BNK_CMD_PROG);
 171         printf("0x%08lx C302F_BNK_CMD_ERASE1\n", C302F_BNK_CMD_ERASE1);
 172         printf("0x%08lx C302F_BNK_CMD_ERASE2\n", C302F_BNK_CMD_ERASE2);
 173         printf("0x%08lx C302F_BNK_CMD_CLR_STAT\n", C302F_BNK_CMD_CLR_STAT);
 174         printf("0x%08lx C302F_BNK_CMD_RST\n", C302F_BNK_CMD_RST);
 175         printf("0x%08lx C302F_BNK_STAT_RDY\n", C302F_BNK_STAT_RDY);
 176         printf("0x%08lx C302F_BNK_STAT_ERR\n", C302F_BNK_STAT_ERR);
 177 #endif
 178
 179         saddrw = (c302f_addr_t)info->start[sect];
 180         eaddrw = C302F_BNK_ADDR_NEXT_WORD(saddrw);
 181
 182 #ifdef FLASH_DEBUG
 183         printf("erasing sector %d, start addr = 0x%08lx "
 184                 "(bank next word addr = 0x%08lx)\n", sect,
 185                 (unsigned long)saddrw, (unsigned long)eaddrw);
 186 #endif
 187
 188         /* Disable intrs which might cause a timeout here */
 189         flag = disable_interrupts();
 190
 191         for (addrw = saddrw; addrw < eaddrw; addrw++) {
 192 #ifdef FLASH_DEBUG
 193                 printf("  writing erase cmd to addr 0x%08lx\n",
 194                         (unsigned long)addrw);
 195 #endif
 196                 *addrw = C302F_BNK_CMD_ERASE1;
 197                 *addrw = C302F_BNK_CMD_ERASE2;
 198         }
 199
 200         /* re-enable interrupts if necessary */
 201         if (flag)
 202                 enable_interrupts();
 203 }
 204
 205 static int
 206 c302f_erase_poll(flash_info_t *info, int sect)
 207 {
 208         c302f_addr_t addrw, saddrw, eaddrw;
 209         int sectdone, haderr;
 210
 211         saddrw = (c302f_addr_t)info->start[sect];
 212         eaddrw = C302F_BNK_ADDR_NEXT_WORD(saddrw);
 213
 214         sectdone = 1;
 215         haderr = 0;
 216
 217         for (addrw = saddrw; addrw < eaddrw; addrw++) {
 218                 c302f_word_t stat = *addrw;
 219
 220 #ifdef FLASH_DEBUG
 221                 printf("  checking status at addr "
 222                         "0x%08lx [0x%08lx]\n",
 223                         (unsigned long)addrw, stat);
 224 #endif
 225                 if ((stat & C302F_BNK_STAT_RDY) != C302F_BNK_STAT_RDY)
 226                         sectdone = 0;
 227                 else if ((stat & C302F_BNK_STAT_ERR) != 0) {
 228                         printf(" failed on sector %d "
 229                                 "(stat = 0x%08lx) at "
 230                                 "address 0x%08lx\n",
 231                                 sect, stat,
 232                                 (unsigned long)addrw);
 233                         *addrw = C302F_BNK_CMD_CLR_STAT;
 234                         haderr = 1;
 235                 }
 236         }
 237
 238         if (haderr)
 239                 return (-1);
 240         else
 241                 return (sectdone);
 242 }
 243
 244 static int
 245 c302f_write_word(c302f_addr_t addr, c302f_word_t value)
 246 {
 247         c302f_word_t stat;
 248         ulong start;
 249         int flag, retval;
 250
 251         /* Disable interrupts which might cause a timeout here */
 252         flag = disable_interrupts();
 253
 254         *addr = C302F_BNK_CMD_PROG;
 255
 256         *addr = value;
 257
 258         /* re-enable interrupts if necessary */
 259         if (flag)
 260                 enable_interrupts();
 261
 262         retval = 0;
 263
 264         /* data polling for D7 */
 265         start = get_timer (0);
 266         do {
 267                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 268                         retval = 1;
 269                         goto done;
 270                 }
 271                 stat = *addr;
 272         } while ((stat & C302F_BNK_STAT_RDY) != C302F_BNK_STAT_RDY);
 273
 274         if ((stat & C302F_BNK_STAT_ERR) != 0) {
 275                 printf("flash program failed (stat = 0x%08lx) "
 276                         "at address 0x%08lx\n", (ulong)stat, (ulong)addr);
 277                 *addr = C302F_BNK_CMD_CLR_STAT;
 278                 retval = 3;
 279         }
 280
 281 done:
 282         /* reset to read mode */
 283         *addr = C302F_BNK_CMD_RST;
 284
 285         return (retval);
 286 }
 287
 288 #endif  /* CONFIG_CMA302 */
 289
 290 unsigned long
 291 flash_init(void)
 292 {
 293         unsigned long total;
 294         int i;
 295         flash_info_t *fip;
 296
 297         /* Init: no FLASHes known */
 298         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 299                 flash_info[i].flash_id = FLASH_UNKNOWN;
 300         }
 301
 302         fip = &flash_info[0];
 303         total = 0L;
 304
 305 #if defined(CONFIG_CMA302)
 306         c302f_probe(fip, (c302f_addr_t)CFG_FLASH_BASE);
 307         total += fip->size;
 308         fip++;
 309 #endif
 310
 311 #if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
 312         /* not yet ...
 313         cmbf_probe(fip, (cmbf_addr_t)CMA_MB_FLASH_BASE);
 314         total += fip->size;
 315         fip++;
 316         */
 317 #endif
 318
 319         /*
 320          * protect monitor and environment sectors
 321          */
 322
 323 #if CFG_MONITOR_BASE == CFG_FLASH_BASE
 324         flash_protect(FLAG_PROTECT_SET,
 325                       CFG_MONITOR_BASE,
 326                       CFG_MONITOR_BASE+monitor_flash_len-1,
 327                       &flash_info[0]);
 328 #endif
 329
 330 #ifdef  CONFIG_ENV_IS_IN_FLASH
 331         /* ENV protection ON by default */
 332         flash_protect(FLAG_PROTECT_SET,
 333                       CONFIG_ENV_ADDR,
 334                       CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
 335                       &flash_info[0]);
 336 #endif
 337         return total;
 338 }
 339
 340 /*-----------------------------------------------------------------------
 341  */
 342 void
 343 flash_print_info(flash_info_t *info)
 344 {
 345         int i;
 346
 347         if (info->flash_id == FLASH_UNKNOWN) {
 348                 printf ("missing or unknown FLASH type\n");
 349                 return;
 350         }
 351
 352         switch (info->flash_id & FLASH_VENDMASK) {
 353         case FLASH_MAN_INTEL:   printf ("INTEL ");              break;
 354         default:                printf ("Unknown Vendor ");     break;
 355         }
 356
 357         switch (info->flash_id & FLASH_TYPEMASK) {
 358         case FLASH_28F008S5:    printf ("28F008S5\n");
 359                                 break;
 360         default:                printf ("Unknown Chip Type\n");
 361                                 break;
 362         }
 363
 364         printf ("  Size: %ld MB in %d Sectors\n",
 365                 info->size >> 20, info->sector_count);
 366
 367         printf ("  Sector Start Addresses:");
 368         for (i=0; i<info->sector_count; ++i) {
 369                 if ((i % 4) == 0)
 370                         printf ("\n   ");
 371                 printf (" %2d - %08lX%s", i,
 372                         info->start[i],
 373                         info->protect[i] ? " (RO)" : "     "
 374                 );
 375         }
 376         printf ("\n");
 377         return;
 378 }
 379
 380 /*-----------------------------------------------------------------------
 381  */
 382
 383
 384 /*-----------------------------------------------------------------------
 385  */
 386
 387 /*
 388  * The following code cannot be run from FLASH!
 389  */
 390
 391 int
 392 flash_erase(flash_info_t *info, int s_first, int s_last)
 393 {
 394         int prot, sect, haderr;
 395         ulong start, now, last;
 396         void (*erase_init)(flash_info_t *, int);
 397         int (*erase_poll)(flash_info_t *, int);
 398         void (*reset)(flash_info_t *, int);
 399         int rcode = 0;
 400
 401 #ifdef FLASH_DEBUG
 402         printf("\nflash_erase: erase %d sectors (%d to %d incl.) from\n"
 403                 "  Bank # %d: ", s_last - s_first + 1, s_first, s_last,
 404                 (info - flash_info) + 1);
 405         flash_print_info(info);
 406 #endif
 407
 408         if ((s_first < 0) || (s_first > s_last)) {
 409                 if (info->flash_id == FLASH_UNKNOWN) {
 410                         printf ("- missing\n");
 411                 } else {
 412                         printf ("- no sectors to erase\n");
 413                 }
 414                 return 1;
 415         }
 416
 417         switch (info->flash_id) {
 418
 419 #if defined(CONFIG_CMA302)
 420         case FLASH_MAN_INTEL|FLASH_28F008S5:
 421                 erase_init = c302f_erase_init;
 422                 erase_poll = c302f_erase_poll;
 423                 reset = c302f_reset;
 424                 break;
 425 #endif
 426
 427 #if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
 428         case FLASH_MAN_INTEL|FLASH_28F800_B:
 429         case FLASH_MAN_AMD|FLASH_AM29F800B:
 430                 /* not yet ...
 431                 erase_init = cmbf_erase_init;
 432                 erase_poll = cmbf_erase_poll;
 433                 reset = cmbf_reset;
 434                 break;
 435                 */
 436 #endif
 437
 438         default:
 439                 printf ("Flash type %08lx not supported - aborted\n",
 440                         info->flash_id);
 441                 return 1;
 442         }
 443
 444         prot = 0;
 445         for (sect=s_first; sect<=s_last; ++sect) {
 446                 if (info->protect[sect]) {
 447                         prot++;
 448                 }
 449         }
 450
 451         if (prot) {
 452                 printf("- Warning: %d protected sector%s will not be erased!\n",
 453                         prot, (prot > 1 ? "s" : ""));
 454         }
 455
 456         start = get_timer (0);
 457         last = 0;
 458         haderr = 0;
 459
 460         for (sect = s_first; sect <= s_last; sect++) {
 461                 if (info->protect[sect] == 0) { /* not protected */
 462                         ulong estart;
 463                         int sectdone;
 464
 465                         (*erase_init)(info, sect);
 466
 467                         /* wait at least 80us - let's wait 1 ms */
 468                         udelay (1000);
 469
 470                         estart = get_timer(start);
 471
 472                         do {
 473                                 now = get_timer(start);
 474
 475                                 if (now - estart > CFG_FLASH_ERASE_TOUT) {
 476                                         printf ("Timeout (sect %d)\n", sect);
 477                                         haderr = 1;
 478                                         break;
 479                                 }
 480
 481 #ifndef FLASH_DEBUG
 482                                 /* show that we're waiting */
 483                                 if ((now - last) > 1000) { /* every second */
 484                                         putc ('.');
 485                                         last = now;
 486                                 }
 487 #endif
 488
 489                                 sectdone = (*erase_poll)(info, sect);
 490
 491                                 if (sectdone < 0) {
 492                                         haderr = 1;
 493                                         break;
 494                                 }
 495
 496                         } while (!sectdone);
 497
 498                         if (haderr)
 499                                 break;
 500                 }
 501         }
 502
 503         if (haderr > 0) {
 504                 printf (" failed\n");
 505                 rcode = 1;
 506         }
 507         else
 508                 printf (" done\n");
 509
 510         /* reset to read mode */
 511         for (sect = s_first; sect <= s_last; sect++) {
 512                 if (info->protect[sect] == 0) { /* not protected */
 513                         (*reset)(info, sect);
 514                 }
 515         }
 516         return rcode;
 517 }
 518
 519 /*-----------------------------------------------------------------------
 520  * Copy memory to flash, returns:
 521  * 0 - OK
 522  * 1 - write timeout
 523  * 2 - Flash not erased
 524  * 3 - write error
 525  */
 526
 527 int
 528 write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 529 {
 530         ulong cp, wp, data;
 531         int i, l, rc;
 532         ulong start, now, last;
 533
 534         wp = (addr & ~3);       /* get lower word aligned address */
 535
 536         /*
 537          * handle unaligned start bytes
 538          */
 539         if ((l = addr - wp) != 0) {
 540                 data = 0;
 541                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 542                         data = (data << 8) | (*(uchar *)cp);
 543                 }
 544                 for (; i<4 && cnt>0; ++i) {
 545                         data = (data << 8) | *src++;
 546                         --cnt;
 547                         ++cp;
 548                 }
 549                 for (; cnt==0 && i<4; ++i, ++cp) {
 550                         data = (data << 8) | (*(uchar *)cp);
 551                 }
 552
 553                 if ((rc = write_word(info, wp, data)) != 0) {
 554                         return (rc);
 555                 }
 556                 wp += 4;
 557         }
 558
 559         /*
 560          * handle word aligned part
 561          */
 562         start = get_timer (0);
 563         last = 0;
 564         while (cnt >= 4) {
 565                 data = 0;
 566                 for (i=0; i<4; ++i) {
 567                         data = (data << 8) | *src++;
 568                 }
 569                 if ((rc = write_word(info, wp, data)) != 0) {
 570                         return (rc);
 571                 }
 572                 wp  += 4;
 573                 cnt -= 4;
 574
 575                 /* show that we're waiting */
 576                 now = get_timer(start);
 577                 if ((now - last) > 1000) {      /* every second */
 578                         putc ('.');
 579                         last = now;
 580                 }
 581         }
 582
 583         if (cnt == 0) {
 584                 return (0);
 585         }
 586
 587         /*
 588          * handle unaligned tail bytes
 589          */
 590         data = 0;
 591         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 592                 data = (data << 8) | *src++;
 593                 --cnt;
 594         }
 595         for (; i<4; ++i, ++cp) {
 596                 data = (data << 8) | (*(uchar *)cp);
 597         }
 598
 599         return (write_word(info, wp, data));
 600 }
 601
 602 /*-----------------------------------------------------------------------
 603  * Write a word to Flash, returns:
 604  * 0 - OK
 605  * 1 - write timeout
 606  * 2 - Flash not erased
 607  * 3 - write error
 608  */
 609 static int
 610 write_word(flash_info_t *info, ulong dest, ulong data)
 611 {
 612         int retval;
 613
 614         /* Check if Flash is (sufficiently) erased */
 615         if ((*(ulong *)dest & data) != data) {
 616                 return (2);
 617         }
 618
 619         switch (info->flash_id) {
 620
 621 #if defined(CONFIG_CMA302)
 622         case FLASH_MAN_INTEL|FLASH_28F008S5:
 623                 retval = c302f_write_word((c302f_addr_t)dest, (c302f_word_t)data);
 624                 break;
 625 #endif
 626
 627 #if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
 628         case FLASH_MAN_INTEL|FLASH_28F800_B:
 629         case FLASH_MAN_AMD|FLASH_AM29F800B:
 630                 /* not yet ...
 631                 retval = cmbf_write_word((cmbf_addr_t)dest, (cmbf_word_t)data);
 632                 */
 633                 retval = 3;
 634                 break;
 635 #endif
 636
 637         default:
 638                 printf ("Flash type %08lx not supported - aborted\n",
 639                         info->flash_id);
 640                 retval = 3;
 641                 break;
 642         }
 643
 644         return (retval);
 645 }
 646
 647 /*-----------------------------------------------------------------------
 648  */