board/snmc/qs850/flash.c

   1 /*
   2  * (C) Copyright 2003
   3  * MuLogic B.V.
   4  *
   5  * (C) Copyright 2001
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <ppc4xx.h>
  29 #include <asm/u-boot.h>
  30 #include <asm/processor.h>
  31
  32 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
  33
  34
  35 #define FLASH_WORD_SIZE unsigned long
  36 #define FLASH_ID_MASK 0xFFFFFFFF
  37
  38 /*-----------------------------------------------------------------------
  39  * Functions
  40  */
  41 /* stolen from esteem192e/flash.c */
  42 ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info);
  43
  44 static int write_word (flash_info_t *info, ulong dest, ulong data);
  45 static void flash_get_offsets (ulong base, flash_info_t *info);
  46
  47
  48 /*-----------------------------------------------------------------------
  49  */
  50
  51 unsigned long flash_init (void)
  52 {
  53         unsigned long size_b0, size_b1;
  54         int i;
  55         uint pbcr;
  56         unsigned long base_b0, base_b1;
  57         volatile FLASH_WORD_SIZE* flash_base;
  58
  59         /* Init: no FLASHes known */
  60         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  61                 flash_info[i].flash_id = FLASH_UNKNOWN;
  62         }
  63
  64         /* Static FLASH Bank configuration here */
  65         /* Test for 8M Flash first */
  66         debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_8M_PRELIM);
  67         flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_8M_PRELIM);
  68         size_b0 = flash_get_size(flash_base, &flash_info[0]);
  69
  70         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  71                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  72                 size_b0, size_b0<<20);
  73                 return 0;
  74         }
  75
  76         if (size_b0 < 8*1024*1024) {
  77                 /* Not quite 8M, try 4M Flash base address */
  78                 debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_4M_PRELIM);
  79                 flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_4M_PRELIM);
  80                 size_b0 = flash_get_size(flash_base, &flash_info[0]);
  81         }
  82
  83         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  84                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  85                 size_b0, size_b0<<20);
  86                 return 0;
  87         }
  88
  89         /* Only one bank */
  90         if (CFG_MAX_FLASH_BANKS == 1) {
  91                 /* Setup offsets */
  92                 flash_get_offsets ((ulong)flash_base, &flash_info[0]);
  93
  94                 /* Monitor protection ON by default */
  95                 (void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
  96                         CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, &flash_info[0]);
  97                 size_b1 = 0 ;
  98                 flash_info[0].size = size_b0;
  99                 return(size_b0);
 100         }
 101
 102         /* We have 2 banks */
 103         size_b1 = flash_get_size(flash_base, &flash_info[1]);
 104
 105         /* Re-do sizing to get full correct info */
 106         if (size_b1) {
 107                 mtdcr(ebccfga, pb0cr);
 108                 pbcr = mfdcr(ebccfgd);
 109                 mtdcr(ebccfga, pb0cr);
 110                 base_b1 = -size_b1;
 111                 pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
 112                 mtdcr(ebccfgd, pbcr);
 113         }
 114
 115         if (size_b0) {
 116                 mtdcr(ebccfga, pb1cr);
 117                 pbcr = mfdcr(ebccfgd);
 118                 mtdcr(ebccfga, pb1cr);
 119                 base_b0 = base_b1 - size_b0;
 120                 pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
 121                 mtdcr(ebccfgd, pbcr);
 122         }
 123
 124         size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]);
 125         flash_get_offsets (base_b0, &flash_info[0]);
 126
 127         /* monitor protection ON by default */
 128         (void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
 129                 CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, &flash_info[0]);
 130
 131         if (size_b1) {
 132                 /* Re-do sizing to get full correct info */
 133                 size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b1, &flash_info[1]);
 134                 flash_get_offsets (base_b1, &flash_info[1]);
 135
 136                 /* monitor protection ON by default */
 137                 (void)flash_protect(FLAG_PROTECT_SET, base_b1+size_b1-CFG_MONITOR_LEN,
 138                         base_b1+size_b1-1, &flash_info[1]);
 139
 140                 /* monitor protection OFF by default (one is enough) */
 141                 (void)flash_protect(FLAG_PROTECT_CLEAR, base_b0+size_b0-CFG_MONITOR_LEN,
 142                         base_b0+size_b0-1, &flash_info[0]);
 143         } else {
 144                 flash_info[1].flash_id = FLASH_UNKNOWN;
 145                 flash_info[1].sector_count = -1;
 146         }
 147
 148         flash_info[0].size = size_b0;
 149         flash_info[1].size = size_b1;
 150         return (size_b0 + size_b1);
 151 }
 152
 153
 154
 155 /*-----------------------------------------------------------------------
 156  This code is specific to the AM29DL163/AM29DL232 for the QS850/QS823.
 157  */
 158
 159 static void flash_get_offsets (ulong base, flash_info_t *info)
 160 {
 161         int i;
 162         long large_sect_size;
 163         long small_sect_size;
 164
 165         /* set up sector start adress table */
 166         large_sect_size = info->size / (info->sector_count - 8 + 1);
 167         small_sect_size = large_sect_size / 8;
 168
 169         if (info->flash_id & FLASH_BTYPE) {
 170
 171                 /* set sector offsets for bottom boot block type */
 172                 for (i = 0; i < 7; i++) {
 173                         info->start[i] = base;
 174                         base += small_sect_size;
 175                 }
 176
 177                 for (; i < info->sector_count; i++) {
 178                         info->start[i] = base;
 179                         base += large_sect_size;
 180                 }
 181         }
 182         else
 183         {
 184                 /* set sector offsets for top boot block type */
 185                 for (i = 0; i < (info->sector_count - 8); i++) {
 186                         info->start[i] = base;
 187                         base += large_sect_size;
 188                 }
 189
 190                 for (; i < info->sector_count; i++) {
 191                         info->start[i] = base;
 192                         base += small_sect_size;
 193                 }
 194         }
 195 }
 196
 197 /*-----------------------------------------------------------------------
 198  */
 199
 200 void flash_print_info  (flash_info_t *info)
 201 {
 202         int i;
 203         uchar *boottype;
 204         uchar botboot[]=", bottom boot sect)\n";
 205         uchar topboot[]=", top boot sector)\n";
 206
 207         if (info->flash_id == FLASH_UNKNOWN) {
 208                 printf ("missing or unknown FLASH type\n");
 209                 return;
 210         }
 211
 212         switch (info->flash_id & FLASH_VENDMASK) {
 213                 case FLASH_MAN_AMD:
 214                         printf ("AMD ");
 215                         break;
 216                 case FLASH_MAN_FUJ:
 217                         printf ("FUJITSU ");
 218                         break;
 219                 case FLASH_MAN_SST:
 220                         printf ("SST ");
 221                         break;
 222                 case FLASH_MAN_STM:
 223                         printf ("STM ");
 224                         break;
 225                 case FLASH_MAN_INTEL:
 226                         printf ("INTEL ");
 227                         break;
 228                 default:
 229                         printf ("Unknown Vendor ");
 230                         break;
 231         }
 232
 233         if (info->flash_id & 0x0001 ) {
 234                 boottype = botboot;
 235         } else {
 236                 boottype = topboot;
 237         }
 238
 239         switch (info->flash_id & FLASH_TYPEMASK) {
 240                 case FLASH_AM160B:
 241                         printf ("AM29LV160B (16 Mbit%s",boottype);
 242                         break;
 243                 case FLASH_AM160T:
 244                         printf ("AM29LV160T (16 Mbit%s",boottype);
 245                         break;
 246                 case FLASH_AMDL163T:
 247                         printf ("AM29DL163T (16 Mbit%s",boottype);
 248                         break;
 249                 case FLASH_AMDL163B:
 250                         printf ("AM29DL163B (16 Mbit%s",boottype);
 251                         break;
 252                 case FLASH_AM320B:
 253                         printf ("AM29LV320B (32 Mbit%s",boottype);
 254                         break;
 255                 case FLASH_AM320T:
 256                         printf ("AM29LV320T (32 Mbit%s",boottype);
 257                         break;
 258                 case FLASH_AMDL323T:
 259                         printf ("AM29DL323T (32 Mbit%s",boottype);
 260                         break;
 261                 case FLASH_AMDL323B:
 262                         printf ("AM29DL323B (32 Mbit%s",boottype);
 263                         break;
 264                 case FLASH_AMDL322T:
 265                         printf ("AM29DL322T (32 Mbit%s",boottype);
 266                         break;
 267                 default:
 268                         printf ("Unknown Chip Type\n");
 269                         break;
 270         }
 271
 272         printf ("  Size: %ld MB in %d Sectors\n",
 273         info->size >> 20, info->sector_count);
 274
 275         printf ("  Sector Start Addresses:");
 276         for (i=0; i<info->sector_count; ++i) {
 277                 if ((i % 5) == 0)
 278                         printf ("\n   ");
 279                 printf (" %08lX%s", info->start[i],
 280                         info->protect[i] ? " (RO)" : "     ");
 281         }
 282         printf ("\n");
 283         return;
 284 }
 285
 286
 287 /*-----------------------------------------------------------------------
 288  * The following code cannot be run from FLASH!
 289  */
 290 ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
 291 {
 292         short i;
 293         ulong base = (ulong)addr;
 294         FLASH_WORD_SIZE value;
 295
 296         /* Write auto select command: read Manufacturer ID */
 297
 298         /*
 299          * Note: if it is an AMD flash and the word at addr[0000]
 300          * is 0x00890089 this routine will think it is an Intel
 301          * flash device and may(most likely) cause trouble.
 302          */
 303
 304         addr[0x0000] = 0x00900090;
 305         if(addr[0x0000] != 0x00890089){
 306                 addr[0x0555] = 0x00AA00AA;
 307                 addr[0x02AA] = 0x00550055;
 308                 addr[0x0555] = 0x00900090;
 309         }
 310         value = addr[0];
 311
 312         switch (value) {
 313                 case (AMD_MANUFACT & FLASH_ID_MASK):
 314                         info->flash_id = FLASH_MAN_AMD;
 315                         break;
 316                 case (FUJ_MANUFACT & FLASH_ID_MASK):
 317                         info->flash_id = FLASH_MAN_FUJ;
 318                         break;
 319                 case (STM_MANUFACT & FLASH_ID_MASK):
 320                         info->flash_id = FLASH_MAN_STM;
 321                         break;
 322                 case (SST_MANUFACT & FLASH_ID_MASK):
 323                         info->flash_id = FLASH_MAN_SST;
 324                         break;
 325                 case (INTEL_MANUFACT & FLASH_ID_MASK):
 326                         info->flash_id = FLASH_MAN_INTEL;
 327                         break;
 328                 default:
 329                         info->flash_id = FLASH_UNKNOWN;
 330                         info->sector_count = 0;
 331                         info->size = 0;
 332                         return (0); /* no or unknown flash */
 333         }
 334
 335         value = addr[1]; /* device ID */
 336
 337         switch (value) {
 338                 case (AMD_ID_LV160T & FLASH_ID_MASK):
 339                         info->flash_id += FLASH_AM160T;
 340                         info->sector_count = 35;
 341                         info->size = 0x00400000;
 342                         break; /* => 4 MB */
 343
 344                 case (AMD_ID_LV160B & FLASH_ID_MASK):
 345                         info->flash_id += FLASH_AM160B;
 346                         info->sector_count = 35;
 347                         info->size = 0x00400000;
 348                         break; /* => 4 MB */
 349
 350                 case (AMD_ID_DL163T & FLASH_ID_MASK):
 351                         info->flash_id += FLASH_AMDL163T;
 352                         info->sector_count = 39;
 353                         info->size = 0x00400000;
 354                         break; /* => 4 MB */
 355
 356                 case (AMD_ID_DL163B & FLASH_ID_MASK):
 357                         info->flash_id += FLASH_AMDL163B;
 358                         info->sector_count = 39;
 359                         info->size = 0x00400000;
 360                         break; /* => 4 MB */
 361
 362                 case (AMD_ID_DL323T & FLASH_ID_MASK):
 363                         info->flash_id += FLASH_AMDL323T;
 364                         info->sector_count = 71;
 365                         info->size = 0x00800000;
 366                         break; /* => 8 MB */
 367
 368                 case (AMD_ID_DL323B & FLASH_ID_MASK):
 369                         info->flash_id += FLASH_AMDL323B;
 370                         info->sector_count = 71;
 371                         info->size = 0x00800000;
 372                         break; /* => 8 MB */
 373
 374                 case (AMD_ID_DL322T & FLASH_ID_MASK):
 375                         info->flash_id += FLASH_AMDL322T;
 376                         info->sector_count = 71;
 377                         info->size = 0x00800000;
 378                         break; /* => 8 MB */
 379
 380                 default:
 381                         /* FIXME*/
 382                         info->flash_id = FLASH_UNKNOWN;
 383                         return (0); /* => no or unknown flash */
 384         }
 385
 386         flash_get_offsets(base, info);
 387
 388         /* check for protected sectors */
 389         for (i = 0; i < info->sector_count; i++) {
 390                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 391                 /* D0 = 1 if protected */
 392                 addr = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 393                 info->protect[i] = addr[2] & 1;
 394         }
 395
 396         /*
 397          * Prevent writes to uninitialized FLASH.
 398          */
 399         if (info->flash_id != FLASH_UNKNOWN) {
 400                 addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 401                 *addr = (0x00FF00FF & FLASH_ID_MASK);   /* reset bank */
 402         }
 403
 404         return (info->size);
 405 }
 406
 407
 408 /*-----------------------------------------------------------------------
 409  */
 410
 411 int flash_erase (flash_info_t *info, int s_first, int s_last)
 412 {
 413         volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]);
 414         int flag, prot, sect, l_sect;
 415         ulong start, now, last;
 416         int rcode = 0;
 417
 418         if ((s_first < 0) || (s_first > s_last)) {
 419                 if (info->flash_id == FLASH_UNKNOWN) {
 420                         printf ("- missing\n");
 421                 } else {
 422                         printf ("- no sectors to erase\n");
 423                 }
 424                 return 1;
 425         }
 426
 427         if ((info->flash_id == FLASH_UNKNOWN) ||
 428                 (info->flash_id > FLASH_AMD_COMP) ) {
 429                 printf ("Can't erase unknown flash type - aborted\n");
 430                 return 1;
 431         }
 432
 433         prot = 0;
 434         for (sect=s_first; sect<=s_last; ++sect) {
 435                 if (info->protect[sect]) {
 436                         prot++;
 437                 }
 438         }
 439
 440         if (prot) {
 441                 printf ("- Warning: %d protected sectors will not be erased!\n",
 442                         prot);
 443         } else {
 444                 printf ("\n");
 445         }
 446
 447         l_sect = -1;
 448
 449         /* Disable interrupts which might cause a timeout here */
 450         flag = disable_interrupts();
 451         addr[0x0555] = 0x00AA00AA;
 452         addr[0x02AA] = 0x00550055;
 453         addr[0x0555] = 0x00800080;
 454         addr[0x0555] = 0x00AA00AA;
 455         addr[0x02AA] = 0x00550055;
 456         /* Start erase on unprotected sectors */
 457         for (sect = s_first; sect<=s_last; sect++) {
 458                 if (info->protect[sect] == 0) { /* not protected */
 459                         addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
 460                         addr[0] = (0x00300030 & FLASH_ID_MASK);
 461                         l_sect = sect;
 462                 }
 463         }
 464
 465         /* re-enable interrupts if necessary */
 466         if (flag)
 467                 enable_interrupts();
 468
 469         /* wait at least 80us - let's wait 1 ms */
 470         udelay (1000);
 471
 472         /*
 473          * We wait for the last triggered sector
 474          */
 475         if (l_sect < 0)
 476                 goto DONE;
 477
 478         start = get_timer (0);
 479         last  = start;
 480         addr = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]);
 481         while ((addr[0] & (0x00800080&FLASH_ID_MASK)) !=
 482                         (0x00800080&FLASH_ID_MASK)  )
 483         {
 484                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 485                         printf ("Timeout\n");
 486                         return 1;
 487                 }
 488                 /* show that we're waiting */
 489                 if ((now - last) > 1000) { /* every second */
 490                         serial_putc ('.');
 491                         last = now;
 492                 }
 493         }
 494
 495 DONE:
 496         /* reset to read mode */
 497         addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 498         addr[0] = (0x00F000F0 & FLASH_ID_MASK); /* reset bank */
 499
 500         printf (" done\n");
 501         return rcode;
 502 }
 503
 504 /*-----------------------------------------------------------------------
 505  * Copy memory to flash, returns:
 506  * 0 - OK
 507  * 1 - write timeout
 508  * 2 - Flash not erased
 509  */
 510
 511 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 512 {
 513         ulong cp, wp, data;
 514         int l;
 515         int i, rc;
 516
 517         wp = (addr & ~3); /* get lower word aligned address */
 518
 519         /*
 520          * handle unaligned start bytes
 521          */
 522         if ((l = addr - wp) != 0) {
 523                 data = 0;
 524                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 525                         data = (data << 8) | (*(uchar *)cp);
 526                 }
 527                 for (; i<4 && cnt>0; ++i) {
 528                         data = (data << 8) | *src++;
 529                         --cnt;
 530                         ++cp;
 531                 }
 532                 for (; cnt==0 && i<4; ++i, ++cp) {
 533                         data = (data << 8) | (*(uchar *)cp);
 534                 }
 535
 536                 if ((rc = write_word(info, wp, data)) != 0) {
 537                         return (rc);
 538                 }
 539                 wp += 4;
 540         }
 541
 542         /*
 543          * handle word aligned part
 544          */
 545         while (cnt >= 4) {
 546                 data = 0;
 547                 for (i=0; i<4; ++i) {
 548                         data = (data << 8) | *src++;
 549                 }
 550                 if ((rc = write_word(info, wp, data)) != 0) {
 551                         return (rc);
 552                 }
 553                 wp  += 4;
 554                 cnt -= 4;
 555         }
 556
 557         if (cnt == 0) {
 558                 return (0);
 559         }
 560
 561         /*
 562          * handle unaligned tail bytes
 563          */
 564         data = 0;
 565         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 566                 data = (data << 8) | *src++;
 567                 --cnt;
 568         }
 569         for (; i<4; ++i, ++cp) {
 570                 data = (data << 8) | (*(uchar *)cp);
 571         }
 572
 573         return (write_word(info, wp, data));
 574 }
 575
 576 /*-----------------------------------------------------------------------
 577  * Write a word to Flash, returns:
 578  * 0 - OK
 579  * 1 - write timeout
 580  * 2 - Flash not erased
 581  */
 582 static int write_word (flash_info_t *info, ulong dest, ulong data)
 583 {
 584         vu_long *addr = (vu_long*)(info->start[0]);
 585         ulong start;
 586         int flag;
 587
 588         /* Check if Flash is (sufficiently) erased */
 589         if ((*((vu_long *)dest) & data) != data) {
 590                 return (2);
 591         }
 592
 593         /* Disable interrupts which might cause a timeout here */
 594         flag = disable_interrupts();
 595
 596         /* AMD stuff */
 597         addr[0x0555] = 0x00AA00AA;
 598         addr[0x02AA] = 0x00550055;
 599         addr[0x0555] = 0x00A000A0;
 600
 601         *((vu_long *)dest) = data;
 602
 603         /* re-enable interrupts if necessary */
 604         if (flag)
 605                 enable_interrupts();
 606
 607         /* data polling for D7 */
 608         start = get_timer(0);
 609
 610         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 611                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 612                         return (1);
 613                 }
 614         }
 615
 616         return (0);
 617 }