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[CONFIG_SYS_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<CONFIG_SYS_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 (CONFIG_SYS_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, CONFIG_SYS_MONITOR_BASE,
  96                         CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_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, CONFIG_SYS_MONITOR_BASE,
 129                 CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_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-CONFIG_SYS_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-CONFIG_SYS_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  This code is specific to the AM29DL163/AM29DL232 for the QS850/QS823.
 156  */
 157
 158 static void flash_get_offsets (ulong base, flash_info_t *info)
 159 {
 160         int i;
 161         long large_sect_size;
 162         long small_sect_size;
 163
 164         /* set up sector start adress table */
 165         large_sect_size = info->size / (info->sector_count - 8 + 1);
 166         small_sect_size = large_sect_size / 8;
 167
 168         if (info->flash_id & FLASH_BTYPE) {
 169
 170                 /* set sector offsets for bottom boot block type */
 171                 for (i = 0; i < 7; i++) {
 172                         info->start[i] = base;
 173                         base += small_sect_size;
 174                 }
 175
 176                 for (; i < info->sector_count; i++) {
 177                         info->start[i] = base;
 178                         base += large_sect_size;
 179                 }
 180         }
 181         else
 182         {
 183                 /* set sector offsets for top boot block type */
 184                 for (i = 0; i < (info->sector_count - 8); i++) {
 185                         info->start[i] = base;
 186                         base += large_sect_size;
 187                 }
 188
 189                 for (; i < info->sector_count; i++) {
 190                         info->start[i] = base;
 191                         base += small_sect_size;
 192                 }
 193         }
 194 }
 195
 196 /*-----------------------------------------------------------------------
 197  */
 198
 199 void flash_print_info  (flash_info_t *info)
 200 {
 201         int i;
 202         uchar *boottype;
 203         uchar botboot[]=", bottom boot sect)\n";
 204         uchar topboot[]=", top boot sector)\n";
 205
 206         if (info->flash_id == FLASH_UNKNOWN) {
 207                 printf ("missing or unknown FLASH type\n");
 208                 return;
 209         }
 210
 211         switch (info->flash_id & FLASH_VENDMASK) {
 212                 case FLASH_MAN_AMD:
 213                         printf ("AMD ");
 214                         break;
 215                 case FLASH_MAN_FUJ:
 216                         printf ("FUJITSU ");
 217                         break;
 218                 case FLASH_MAN_SST:
 219                         printf ("SST ");
 220                         break;
 221                 case FLASH_MAN_STM:
 222                         printf ("STM ");
 223                         break;
 224                 case FLASH_MAN_INTEL:
 225                         printf ("INTEL ");
 226                         break;
 227                 default:
 228                         printf ("Unknown Vendor ");
 229                         break;
 230         }
 231
 232         if (info->flash_id & 0x0001 ) {
 233                 boottype = botboot;
 234         } else {
 235                 boottype = topboot;
 236         }
 237
 238         switch (info->flash_id & FLASH_TYPEMASK) {
 239                 case FLASH_AM160B:
 240                         printf ("AM29LV160B (16 Mbit%s",boottype);
 241                         break;
 242                 case FLASH_AM160T:
 243                         printf ("AM29LV160T (16 Mbit%s",boottype);
 244                         break;
 245                 case FLASH_AMDL163T:
 246                         printf ("AM29DL163T (16 Mbit%s",boottype);
 247                         break;
 248                 case FLASH_AMDL163B:
 249                         printf ("AM29DL163B (16 Mbit%s",boottype);
 250                         break;
 251                 case FLASH_AM320B:
 252                         printf ("AM29LV320B (32 Mbit%s",boottype);
 253                         break;
 254                 case FLASH_AM320T:
 255                         printf ("AM29LV320T (32 Mbit%s",boottype);
 256                         break;
 257                 case FLASH_AMDL323T:
 258                         printf ("AM29DL323T (32 Mbit%s",boottype);
 259                         break;
 260                 case FLASH_AMDL323B:
 261                         printf ("AM29DL323B (32 Mbit%s",boottype);
 262                         break;
 263                 case FLASH_AMDL322T:
 264                         printf ("AM29DL322T (32 Mbit%s",boottype);
 265                         break;
 266                 default:
 267                         printf ("Unknown Chip Type\n");
 268                         break;
 269         }
 270
 271         printf ("  Size: %ld MB in %d Sectors\n",
 272         info->size >> 20, info->sector_count);
 273
 274         printf ("  Sector Start Addresses:");
 275         for (i=0; i<info->sector_count; ++i) {
 276                 if ((i % 5) == 0)
 277                         printf ("\n   ");
 278                 printf (" %08lX%s", info->start[i],
 279                         info->protect[i] ? " (RO)" : "     ");
 280         }
 281         printf ("\n");
 282         return;
 283 }
 284
 285
 286 /*-----------------------------------------------------------------------
 287  * The following code cannot be run from FLASH!
 288  */
 289 ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
 290 {
 291         short i;
 292         ulong base = (ulong)addr;
 293         FLASH_WORD_SIZE value;
 294
 295         /* Write auto select command: read Manufacturer ID */
 296
 297         /*
 298          * Note: if it is an AMD flash and the word at addr[0000]
 299          * is 0x00890089 this routine will think it is an Intel
 300          * flash device and may(most likely) cause trouble.
 301          */
 302
 303         addr[0x0000] = 0x00900090;
 304         if(addr[0x0000] != 0x00890089){
 305                 addr[0x0555] = 0x00AA00AA;
 306                 addr[0x02AA] = 0x00550055;
 307                 addr[0x0555] = 0x00900090;
 308         }
 309         value = addr[0];
 310
 311         switch (value) {
 312                 case (AMD_MANUFACT & FLASH_ID_MASK):
 313                         info->flash_id = FLASH_MAN_AMD;
 314                         break;
 315                 case (FUJ_MANUFACT & FLASH_ID_MASK):
 316                         info->flash_id = FLASH_MAN_FUJ;
 317                         break;
 318                 case (STM_MANUFACT & FLASH_ID_MASK):
 319                         info->flash_id = FLASH_MAN_STM;
 320                         break;
 321                 case (SST_MANUFACT & FLASH_ID_MASK):
 322                         info->flash_id = FLASH_MAN_SST;
 323                         break;
 324                 case (INTEL_MANUFACT & FLASH_ID_MASK):
 325                         info->flash_id = FLASH_MAN_INTEL;
 326                         break;
 327                 default:
 328                         info->flash_id = FLASH_UNKNOWN;
 329                         info->sector_count = 0;
 330                         info->size = 0;
 331                         return (0); /* no or unknown flash */
 332         }
 333
 334         value = addr[1]; /* device ID */
 335
 336         switch (value) {
 337                 case (AMD_ID_LV160T & FLASH_ID_MASK):
 338                         info->flash_id += FLASH_AM160T;
 339                         info->sector_count = 35;
 340                         info->size = 0x00400000;
 341                         break; /* => 4 MB */
 342
 343                 case (AMD_ID_LV160B & FLASH_ID_MASK):
 344                         info->flash_id += FLASH_AM160B;
 345                         info->sector_count = 35;
 346                         info->size = 0x00400000;
 347                         break; /* => 4 MB */
 348
 349                 case (AMD_ID_DL163T & FLASH_ID_MASK):
 350                         info->flash_id += FLASH_AMDL163T;
 351                         info->sector_count = 39;
 352                         info->size = 0x00400000;
 353                         break; /* => 4 MB */
 354
 355                 case (AMD_ID_DL163B & FLASH_ID_MASK):
 356                         info->flash_id += FLASH_AMDL163B;
 357                         info->sector_count = 39;
 358                         info->size = 0x00400000;
 359                         break; /* => 4 MB */
 360
 361                 case (AMD_ID_DL323T & FLASH_ID_MASK):
 362                         info->flash_id += FLASH_AMDL323T;
 363                         info->sector_count = 71;
 364                         info->size = 0x00800000;
 365                         break; /* => 8 MB */
 366
 367                 case (AMD_ID_DL323B & FLASH_ID_MASK):
 368                         info->flash_id += FLASH_AMDL323B;
 369                         info->sector_count = 71;
 370                         info->size = 0x00800000;
 371                         break; /* => 8 MB */
 372
 373                 case (AMD_ID_DL322T & FLASH_ID_MASK):
 374                         info->flash_id += FLASH_AMDL322T;
 375                         info->sector_count = 71;
 376                         info->size = 0x00800000;
 377                         break; /* => 8 MB */
 378
 379                 default:
 380                         /* FIXME*/
 381                         info->flash_id = FLASH_UNKNOWN;
 382                         return (0); /* => no or unknown flash */
 383         }
 384
 385         flash_get_offsets(base, info);
 386
 387         /* check for protected sectors */
 388         for (i = 0; i < info->sector_count; i++) {
 389                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 390                 /* D0 = 1 if protected */
 391                 addr = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 392                 info->protect[i] = addr[2] & 1;
 393         }
 394
 395         /*
 396          * Prevent writes to uninitialized FLASH.
 397          */
 398         if (info->flash_id != FLASH_UNKNOWN) {
 399                 addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 400                 *addr = (0x00FF00FF & FLASH_ID_MASK);   /* reset bank */
 401         }
 402
 403         return (info->size);
 404 }
 405
 406
 407 /*-----------------------------------------------------------------------
 408  */
 409
 410 int flash_erase (flash_info_t *info, int s_first, int s_last)
 411 {
 412         volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]);
 413         int flag, prot, sect, l_sect;
 414         ulong start, now, last;
 415         int rcode = 0;
 416
 417         if ((s_first < 0) || (s_first > s_last)) {
 418                 if (info->flash_id == FLASH_UNKNOWN) {
 419                         printf ("- missing\n");
 420                 } else {
 421                         printf ("- no sectors to erase\n");
 422                 }
 423                 return 1;
 424         }
 425
 426         if ((info->flash_id == FLASH_UNKNOWN) ||
 427                 (info->flash_id > FLASH_AMD_COMP) ) {
 428                 printf ("Can't erase unknown flash type - aborted\n");
 429                 return 1;
 430         }
 431
 432         prot = 0;
 433         for (sect=s_first; sect<=s_last; ++sect) {
 434                 if (info->protect[sect]) {
 435                         prot++;
 436                 }
 437         }
 438
 439         if (prot) {
 440                 printf ("- Warning: %d protected sectors will not be erased!\n",
 441                         prot);
 442         } else {
 443                 printf ("\n");
 444         }
 445
 446         l_sect = -1;
 447
 448         /* Disable interrupts which might cause a timeout here */
 449         flag = disable_interrupts();
 450         addr[0x0555] = 0x00AA00AA;
 451         addr[0x02AA] = 0x00550055;
 452         addr[0x0555] = 0x00800080;
 453         addr[0x0555] = 0x00AA00AA;
 454         addr[0x02AA] = 0x00550055;
 455         /* Start erase on unprotected sectors */
 456         for (sect = s_first; sect<=s_last; sect++) {
 457                 if (info->protect[sect] == 0) { /* not protected */
 458                         addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
 459                         addr[0] = (0x00300030 & FLASH_ID_MASK);
 460                         l_sect = sect;
 461                 }
 462         }
 463
 464         /* re-enable interrupts if necessary */
 465         if (flag)
 466                 enable_interrupts();
 467
 468         /* wait at least 80us - let's wait 1 ms */
 469         udelay (1000);
 470
 471         /*
 472          * We wait for the last triggered sector
 473          */
 474         if (l_sect < 0)
 475                 goto DONE;
 476
 477         start = get_timer (0);
 478         last  = start;
 479         addr = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]);
 480         while ((addr[0] & (0x00800080&FLASH_ID_MASK)) !=
 481                         (0x00800080&FLASH_ID_MASK)  )
 482         {
 483                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 484                         printf ("Timeout\n");
 485                         return 1;
 486                 }
 487                 /* show that we're waiting */
 488                 if ((now - last) > 1000) { /* every second */
 489                         serial_putc ('.');
 490                         last = now;
 491                 }
 492         }
 493
 494 DONE:
 495         /* reset to read mode */
 496         addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 497         addr[0] = (0x00F000F0 & FLASH_ID_MASK); /* reset bank */
 498
 499         printf (" done\n");
 500         return rcode;
 501 }
 502
 503 /*-----------------------------------------------------------------------
 504  * Copy memory to flash, returns:
 505  * 0 - OK
 506  * 1 - write timeout
 507  * 2 - Flash not erased
 508  */
 509
 510 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 511 {
 512         ulong cp, wp, data;
 513         int l;
 514         int i, rc;
 515
 516         wp = (addr & ~3); /* get lower word aligned address */
 517
 518         /*
 519          * handle unaligned start bytes
 520          */
 521         if ((l = addr - wp) != 0) {
 522                 data = 0;
 523                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 524                         data = (data << 8) | (*(uchar *)cp);
 525                 }
 526                 for (; i<4 && cnt>0; ++i) {
 527                         data = (data << 8) | *src++;
 528                         --cnt;
 529                         ++cp;
 530                 }
 531                 for (; cnt==0 && i<4; ++i, ++cp) {
 532                         data = (data << 8) | (*(uchar *)cp);
 533                 }
 534
 535                 if ((rc = write_word(info, wp, data)) != 0) {
 536                         return (rc);
 537                 }
 538                 wp += 4;
 539         }
 540
 541         /*
 542          * handle word aligned part
 543          */
 544         while (cnt >= 4) {
 545                 data = 0;
 546                 for (i=0; i<4; ++i) {
 547                         data = (data << 8) | *src++;
 548                 }
 549                 if ((rc = write_word(info, wp, data)) != 0) {
 550                         return (rc);
 551                 }
 552                 wp  += 4;
 553                 cnt -= 4;
 554         }
 555
 556         if (cnt == 0) {
 557                 return (0);
 558         }
 559
 560         /*
 561          * handle unaligned tail bytes
 562          */
 563         data = 0;
 564         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 565                 data = (data << 8) | *src++;
 566                 --cnt;
 567         }
 568         for (; i<4; ++i, ++cp) {
 569                 data = (data << 8) | (*(uchar *)cp);
 570         }
 571
 572         return (write_word(info, wp, data));
 573 }
 574
 575 /*-----------------------------------------------------------------------
 576  * Write a word to Flash, returns:
 577  * 0 - OK
 578  * 1 - write timeout
 579  * 2 - Flash not erased
 580  */
 581 static int write_word (flash_info_t *info, ulong dest, ulong data)
 582 {
 583         vu_long *addr = (vu_long*)(info->start[0]);
 584         ulong start;
 585         int flag;
 586
 587         /* Check if Flash is (sufficiently) erased */
 588         if ((*((vu_long *)dest) & data) != data) {
 589                 return (2);
 590         }
 591
 592         /* Disable interrupts which might cause a timeout here */
 593         flag = disable_interrupts();
 594
 595         /* AMD stuff */
 596         addr[0x0555] = 0x00AA00AA;
 597         addr[0x02AA] = 0x00550055;
 598         addr[0x0555] = 0x00A000A0;
 599
 600         *((vu_long *)dest) = data;
 601
 602         /* re-enable interrupts if necessary */
 603         if (flag)
 604                 enable_interrupts();
 605
 606         /* data polling for D7 */
 607         start = get_timer(0);
 608
 609         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 610                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 611                         return (1);
 612                 }
 613         }
 614
 615         return (0);
 616 }