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  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <asm/ppc4xx.h>
  13 #include <asm/u-boot.h>
  14 #include <asm/processor.h>
  15
  16 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  17
  18
  19 #define FLASH_WORD_SIZE unsigned long
  20 #define FLASH_ID_MASK 0xFFFFFFFF
  21
  22 /*-----------------------------------------------------------------------
  23  * Functions
  24  */
  25 /* stolen from esteem192e/flash.c */
  26 ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info);
  27
  28 static int write_word (flash_info_t *info, ulong dest, ulong data);
  29 static void flash_get_offsets (ulong base, flash_info_t *info);
  30
  31
  32 /*-----------------------------------------------------------------------
  33  */
  34
  35 unsigned long flash_init (void)
  36 {
  37         unsigned long size_b0, size_b1;
  38         int i;
  39         uint pbcr;
  40         unsigned long base_b0, base_b1;
  41         volatile FLASH_WORD_SIZE* flash_base;
  42
  43         /* Init: no FLASHes known */
  44         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  45                 flash_info[i].flash_id = FLASH_UNKNOWN;
  46         }
  47
  48         /* Static FLASH Bank configuration here */
  49         /* Test for 8M Flash first */
  50         debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_8M_PRELIM);
  51         flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_8M_PRELIM);
  52         size_b0 = flash_get_size(flash_base, &flash_info[0]);
  53
  54         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  55                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  56                 size_b0, size_b0<<20);
  57                 return 0;
  58         }
  59
  60         if (size_b0 < 8*1024*1024) {
  61                 /* Not quite 8M, try 4M Flash base address */
  62                 debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_4M_PRELIM);
  63                 flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_4M_PRELIM);
  64                 size_b0 = flash_get_size(flash_base, &flash_info[0]);
  65         }
  66
  67         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  68                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  69                 size_b0, size_b0<<20);
  70                 return 0;
  71         }
  72
  73         /* Only one bank */
  74         if (CONFIG_SYS_MAX_FLASH_BANKS == 1) {
  75                 /* Setup offsets */
  76                 flash_get_offsets ((ulong)flash_base, &flash_info[0]);
  77
  78                 /* Monitor protection ON by default */
  79                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
  80                         CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1, &flash_info[0]);
  81                 size_b1 = 0 ;
  82                 flash_info[0].size = size_b0;
  83                 return(size_b0);
  84         }
  85
  86         /* We have 2 banks */
  87         size_b1 = flash_get_size(flash_base, &flash_info[1]);
  88
  89         /* Re-do sizing to get full correct info */
  90         if (size_b1) {
  91                 mtdcr(EBC0_CFGADDR, PB0CR);
  92                 pbcr = mfdcr(EBC0_CFGDATA);
  93                 mtdcr(EBC0_CFGADDR, PB0CR);
  94                 base_b1 = -size_b1;
  95                 pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
  96                 mtdcr(EBC0_CFGDATA, pbcr);
  97         }
  98
  99         if (size_b0) {
 100                 mtdcr(EBC0_CFGADDR, PB1CR);
 101                 pbcr = mfdcr(EBC0_CFGDATA);
 102                 mtdcr(EBC0_CFGADDR, PB1CR);
 103                 base_b0 = base_b1 - size_b0;
 104                 pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
 105                 mtdcr(EBC0_CFGDATA, pbcr);
 106         }
 107
 108         size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]);
 109         flash_get_offsets (base_b0, &flash_info[0]);
 110
 111         /* monitor protection ON by default */
 112         (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 113                 CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1, &flash_info[0]);
 114
 115         if (size_b1) {
 116                 /* Re-do sizing to get full correct info */
 117                 size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b1, &flash_info[1]);
 118                 flash_get_offsets (base_b1, &flash_info[1]);
 119
 120                 /* monitor protection ON by default */
 121                 (void)flash_protect(FLAG_PROTECT_SET, base_b1+size_b1-CONFIG_SYS_MONITOR_LEN,
 122                         base_b1+size_b1-1, &flash_info[1]);
 123
 124                 /* monitor protection OFF by default (one is enough) */
 125                 (void)flash_protect(FLAG_PROTECT_CLEAR, base_b0+size_b0-CONFIG_SYS_MONITOR_LEN,
 126                         base_b0+size_b0-1, &flash_info[0]);
 127         } else {
 128                 flash_info[1].flash_id = FLASH_UNKNOWN;
 129                 flash_info[1].sector_count = -1;
 130         }
 131
 132         flash_info[0].size = size_b0;
 133         flash_info[1].size = size_b1;
 134         return (size_b0 + size_b1);
 135 }
 136
 137
 138 /*-----------------------------------------------------------------------
 139  This code is specific to the AM29DL163/AM29DL232 for the QS850/QS823.
 140  */
 141
 142 static void flash_get_offsets (ulong base, flash_info_t *info)
 143 {
 144         int i;
 145         long large_sect_size;
 146         long small_sect_size;
 147
 148         /* set up sector start adress table */
 149         large_sect_size = info->size / (info->sector_count - 8 + 1);
 150         small_sect_size = large_sect_size / 8;
 151
 152         if (info->flash_id & FLASH_BTYPE) {
 153
 154                 /* set sector offsets for bottom boot block type */
 155                 for (i = 0; i < 7; i++) {
 156                         info->start[i] = base;
 157                         base += small_sect_size;
 158                 }
 159
 160                 for (; i < info->sector_count; i++) {
 161                         info->start[i] = base;
 162                         base += large_sect_size;
 163                 }
 164         }
 165         else
 166         {
 167                 /* set sector offsets for top boot block type */
 168                 for (i = 0; i < (info->sector_count - 8); i++) {
 169                         info->start[i] = base;
 170                         base += large_sect_size;
 171                 }
 172
 173                 for (; i < info->sector_count; i++) {
 174                         info->start[i] = base;
 175                         base += small_sect_size;
 176                 }
 177         }
 178 }
 179
 180 /*-----------------------------------------------------------------------
 181  */
 182
 183 void flash_print_info  (flash_info_t *info)
 184 {
 185         int i;
 186         uchar *boottype;
 187         uchar botboot[]=", bottom boot sect)\n";
 188         uchar topboot[]=", top boot sector)\n";
 189
 190         if (info->flash_id == FLASH_UNKNOWN) {
 191                 printf ("missing or unknown FLASH type\n");
 192                 return;
 193         }
 194
 195         switch (info->flash_id & FLASH_VENDMASK) {
 196                 case FLASH_MAN_AMD:
 197                         printf ("AMD ");
 198                         break;
 199                 case FLASH_MAN_FUJ:
 200                         printf ("FUJITSU ");
 201                         break;
 202                 case FLASH_MAN_SST:
 203                         printf ("SST ");
 204                         break;
 205                 case FLASH_MAN_STM:
 206                         printf ("STM ");
 207                         break;
 208                 case FLASH_MAN_INTEL:
 209                         printf ("INTEL ");
 210                         break;
 211                 default:
 212                         printf ("Unknown Vendor ");
 213                         break;
 214         }
 215
 216         if (info->flash_id & 0x0001 ) {
 217                 boottype = botboot;
 218         } else {
 219                 boottype = topboot;
 220         }
 221
 222         switch (info->flash_id & FLASH_TYPEMASK) {
 223                 case FLASH_AM160B:
 224                         printf ("AM29LV160B (16 Mbit%s",boottype);
 225                         break;
 226                 case FLASH_AM160T:
 227                         printf ("AM29LV160T (16 Mbit%s",boottype);
 228                         break;
 229                 case FLASH_AMDL163T:
 230                         printf ("AM29DL163T (16 Mbit%s",boottype);
 231                         break;
 232                 case FLASH_AMDL163B:
 233                         printf ("AM29DL163B (16 Mbit%s",boottype);
 234                         break;
 235                 case FLASH_AM320B:
 236                         printf ("AM29LV320B (32 Mbit%s",boottype);
 237                         break;
 238                 case FLASH_AM320T:
 239                         printf ("AM29LV320T (32 Mbit%s",boottype);
 240                         break;
 241                 case FLASH_AMDL323T:
 242                         printf ("AM29DL323T (32 Mbit%s",boottype);
 243                         break;
 244                 case FLASH_AMDL323B:
 245                         printf ("AM29DL323B (32 Mbit%s",boottype);
 246                         break;
 247                 case FLASH_AMDL322T:
 248                         printf ("AM29DL322T (32 Mbit%s",boottype);
 249                         break;
 250                 default:
 251                         printf ("Unknown Chip Type\n");
 252                         break;
 253         }
 254
 255         printf ("  Size: %ld MB in %d Sectors\n",
 256         info->size >> 20, info->sector_count);
 257
 258         printf ("  Sector Start Addresses:");
 259         for (i=0; i<info->sector_count; ++i) {
 260                 if ((i % 5) == 0)
 261                         printf ("\n   ");
 262                 printf (" %08lX%s", info->start[i],
 263                         info->protect[i] ? " (RO)" : "     ");
 264         }
 265         printf ("\n");
 266         return;
 267 }
 268
 269
 270 /*-----------------------------------------------------------------------
 271  * The following code cannot be run from FLASH!
 272  */
 273 ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
 274 {
 275         short i;
 276         ulong base = (ulong)addr;
 277         FLASH_WORD_SIZE value;
 278
 279         /* Write auto select command: read Manufacturer ID */
 280
 281         /*
 282          * Note: if it is an AMD flash and the word at addr[0000]
 283          * is 0x00890089 this routine will think it is an Intel
 284          * flash device and may(most likely) cause trouble.
 285          */
 286
 287         addr[0x0000] = 0x00900090;
 288         if(addr[0x0000] != 0x00890089){
 289                 addr[0x0555] = 0x00AA00AA;
 290                 addr[0x02AA] = 0x00550055;
 291                 addr[0x0555] = 0x00900090;
 292         }
 293         value = addr[0];
 294
 295         switch (value) {
 296                 case (AMD_MANUFACT & FLASH_ID_MASK):
 297                         info->flash_id = FLASH_MAN_AMD;
 298                         break;
 299                 case (FUJ_MANUFACT & FLASH_ID_MASK):
 300                         info->flash_id = FLASH_MAN_FUJ;
 301                         break;
 302                 case (STM_MANUFACT & FLASH_ID_MASK):
 303                         info->flash_id = FLASH_MAN_STM;
 304                         break;
 305                 case (SST_MANUFACT & FLASH_ID_MASK):
 306                         info->flash_id = FLASH_MAN_SST;
 307                         break;
 308                 case (INTEL_MANUFACT & FLASH_ID_MASK):
 309                         info->flash_id = FLASH_MAN_INTEL;
 310                         break;
 311                 default:
 312                         info->flash_id = FLASH_UNKNOWN;
 313                         info->sector_count = 0;
 314                         info->size = 0;
 315                         return (0); /* no or unknown flash */
 316         }
 317
 318         value = addr[1]; /* device ID */
 319
 320         switch (value) {
 321                 case (AMD_ID_LV160T & FLASH_ID_MASK):
 322                         info->flash_id += FLASH_AM160T;
 323                         info->sector_count = 35;
 324                         info->size = 0x00400000;
 325                         break; /* => 4 MB */
 326
 327                 case (AMD_ID_LV160B & FLASH_ID_MASK):
 328                         info->flash_id += FLASH_AM160B;
 329                         info->sector_count = 35;
 330                         info->size = 0x00400000;
 331                         break; /* => 4 MB */
 332
 333                 case (AMD_ID_DL163T & FLASH_ID_MASK):
 334                         info->flash_id += FLASH_AMDL163T;
 335                         info->sector_count = 39;
 336                         info->size = 0x00400000;
 337                         break; /* => 4 MB */
 338
 339                 case (AMD_ID_DL163B & FLASH_ID_MASK):
 340                         info->flash_id += FLASH_AMDL163B;
 341                         info->sector_count = 39;
 342                         info->size = 0x00400000;
 343                         break; /* => 4 MB */
 344
 345                 case (AMD_ID_DL323T & FLASH_ID_MASK):
 346                         info->flash_id += FLASH_AMDL323T;
 347                         info->sector_count = 71;
 348                         info->size = 0x00800000;
 349                         break; /* => 8 MB */
 350
 351                 case (AMD_ID_DL323B & FLASH_ID_MASK):
 352                         info->flash_id += FLASH_AMDL323B;
 353                         info->sector_count = 71;
 354                         info->size = 0x00800000;
 355                         break; /* => 8 MB */
 356
 357                 case (AMD_ID_DL322T & FLASH_ID_MASK):
 358                         info->flash_id += FLASH_AMDL322T;
 359                         info->sector_count = 71;
 360                         info->size = 0x00800000;
 361                         break; /* => 8 MB */
 362
 363                 default:
 364                         /* FIXME*/
 365                         info->flash_id = FLASH_UNKNOWN;
 366                         return (0); /* => no or unknown flash */
 367         }
 368
 369         flash_get_offsets(base, info);
 370
 371         /* check for protected sectors */
 372         for (i = 0; i < info->sector_count; i++) {
 373                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 374                 /* D0 = 1 if protected */
 375                 addr = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 376                 info->protect[i] = addr[2] & 1;
 377         }
 378
 379         /*
 380          * Prevent writes to uninitialized FLASH.
 381          */
 382         if (info->flash_id != FLASH_UNKNOWN) {
 383                 addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 384                 *addr = (0x00FF00FF & FLASH_ID_MASK);   /* reset bank */
 385         }
 386
 387         return (info->size);
 388 }
 389
 390
 391 /*-----------------------------------------------------------------------
 392  */
 393
 394 int flash_erase (flash_info_t *info, int s_first, int s_last)
 395 {
 396         volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]);
 397         int flag, prot, sect, l_sect;
 398         ulong start, now, last;
 399         int rcode = 0;
 400
 401         if ((s_first < 0) || (s_first > s_last)) {
 402                 if (info->flash_id == FLASH_UNKNOWN) {
 403                         printf ("- missing\n");
 404                 } else {
 405                         printf ("- no sectors to erase\n");
 406                 }
 407                 return 1;
 408         }
 409
 410         if ((info->flash_id == FLASH_UNKNOWN) ||
 411                 (info->flash_id > FLASH_AMD_COMP) ) {
 412                 printf ("Can't erase unknown flash type - aborted\n");
 413                 return 1;
 414         }
 415
 416         prot = 0;
 417         for (sect=s_first; sect<=s_last; ++sect) {
 418                 if (info->protect[sect]) {
 419                         prot++;
 420                 }
 421         }
 422
 423         if (prot) {
 424                 printf ("- Warning: %d protected sectors will not be erased!\n",
 425                         prot);
 426         } else {
 427                 printf ("\n");
 428         }
 429
 430         l_sect = -1;
 431
 432         /* Disable interrupts which might cause a timeout here */
 433         flag = disable_interrupts();
 434         addr[0x0555] = 0x00AA00AA;
 435         addr[0x02AA] = 0x00550055;
 436         addr[0x0555] = 0x00800080;
 437         addr[0x0555] = 0x00AA00AA;
 438         addr[0x02AA] = 0x00550055;
 439         /* Start erase on unprotected sectors */
 440         for (sect = s_first; sect<=s_last; sect++) {
 441                 if (info->protect[sect] == 0) { /* not protected */
 442                         addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
 443                         addr[0] = (0x00300030 & FLASH_ID_MASK);
 444                         l_sect = sect;
 445                 }
 446         }
 447
 448         /* re-enable interrupts if necessary */
 449         if (flag)
 450                 enable_interrupts();
 451
 452         /* wait at least 80us - let's wait 1 ms */
 453         udelay (1000);
 454
 455         /*
 456          * We wait for the last triggered sector
 457          */
 458         if (l_sect < 0)
 459                 goto DONE;
 460
 461         start = get_timer (0);
 462         last  = start;
 463         addr = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]);
 464         while ((addr[0] & (0x00800080&FLASH_ID_MASK)) !=
 465                         (0x00800080&FLASH_ID_MASK)  )
 466         {
 467                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 468                         printf ("Timeout\n");
 469                         return 1;
 470                 }
 471                 /* show that we're waiting */
 472                 if ((now - last) > 1000) { /* every second */
 473                         serial_putc ('.');
 474                         last = now;
 475                 }
 476         }
 477
 478 DONE:
 479         /* reset to read mode */
 480         addr = (volatile FLASH_WORD_SIZE *)info->start[0];
 481         addr[0] = (0x00F000F0 & FLASH_ID_MASK); /* reset bank */
 482
 483         printf (" done\n");
 484         return rcode;
 485 }
 486
 487 /*-----------------------------------------------------------------------
 488  * Copy memory to flash, returns:
 489  * 0 - OK
 490  * 1 - write timeout
 491  * 2 - Flash not erased
 492  */
 493
 494 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 495 {
 496         ulong cp, wp, data;
 497         int l;
 498         int i, rc;
 499
 500         wp = (addr & ~3); /* get lower word aligned address */
 501
 502         /*
 503          * handle unaligned start bytes
 504          */
 505         if ((l = addr - wp) != 0) {
 506                 data = 0;
 507                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 508                         data = (data << 8) | (*(uchar *)cp);
 509                 }
 510                 for (; i<4 && cnt>0; ++i) {
 511                         data = (data << 8) | *src++;
 512                         --cnt;
 513                         ++cp;
 514                 }
 515                 for (; cnt==0 && i<4; ++i, ++cp) {
 516                         data = (data << 8) | (*(uchar *)cp);
 517                 }
 518
 519                 if ((rc = write_word(info, wp, data)) != 0) {
 520                         return (rc);
 521                 }
 522                 wp += 4;
 523         }
 524
 525         /*
 526          * handle word aligned part
 527          */
 528         while (cnt >= 4) {
 529                 data = 0;
 530                 for (i=0; i<4; ++i) {
 531                         data = (data << 8) | *src++;
 532                 }
 533                 if ((rc = write_word(info, wp, data)) != 0) {
 534                         return (rc);
 535                 }
 536                 wp  += 4;
 537                 cnt -= 4;
 538         }
 539
 540         if (cnt == 0) {
 541                 return (0);
 542         }
 543
 544         /*
 545          * handle unaligned tail bytes
 546          */
 547         data = 0;
 548         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 549                 data = (data << 8) | *src++;
 550                 --cnt;
 551         }
 552         for (; i<4; ++i, ++cp) {
 553                 data = (data << 8) | (*(uchar *)cp);
 554         }
 555
 556         return (write_word(info, wp, data));
 557 }
 558
 559 /*-----------------------------------------------------------------------
 560  * Write a word to Flash, returns:
 561  * 0 - OK
 562  * 1 - write timeout
 563  * 2 - Flash not erased
 564  */
 565 static int write_word (flash_info_t *info, ulong dest, ulong data)
 566 {
 567         vu_long *addr = (vu_long*)(info->start[0]);
 568         ulong start;
 569         int flag;
 570
 571         /* Check if Flash is (sufficiently) erased */
 572         if ((*((vu_long *)dest) & data) != data) {
 573                 return (2);
 574         }
 575
 576         /* Disable interrupts which might cause a timeout here */
 577         flag = disable_interrupts();
 578
 579         /* AMD stuff */
 580         addr[0x0555] = 0x00AA00AA;
 581         addr[0x02AA] = 0x00550055;
 582         addr[0x0555] = 0x00A000A0;
 583
 584         *((vu_long *)dest) = data;
 585
 586         /* re-enable interrupts if necessary */
 587         if (flag)
 588                 enable_interrupts();
 589
 590         /* data polling for D7 */
 591         start = get_timer(0);
 592
 593         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 594                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 595                         return (1);
 596                 }
 597         }
 598
 599         return (0);
 600 }