qemu/roms/u-boot/board/ivm/flash.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <mpc8xx.h>
  10
  11 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  12
  13 #if defined(CONFIG_ENV_IS_IN_FLASH)
  14 # ifndef  CONFIG_ENV_ADDR
  15 #  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  16 # endif
  17 # ifndef  CONFIG_ENV_SIZE
  18 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  19 # endif
  20 # ifndef  CONFIG_ENV_SECT_SIZE
  21 #  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  22 # endif
  23 #endif
  24
  25 /*-----------------------------------------------------------------------
  26  * Functions
  27  */
  28 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  29 static int write_data (flash_info_t *info, ulong dest, ulong data);
  30 static void flash_get_offsets (ulong base, flash_info_t *info);
  31
  32 /*-----------------------------------------------------------------------
  33  */
  34
  35 unsigned long flash_init (void)
  36 {
  37         volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  38         volatile memctl8xx_t *memctl = &immap->im_memctl;
  39         unsigned long size_b0;
  40         int i;
  41
  42         /* Init: no FLASHes known */
  43         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  44                 flash_info[i].flash_id = FLASH_UNKNOWN;
  45         }
  46
  47         /* Static FLASH Bank configuration here - FIXME XXX */
  48
  49         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  50
  51         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  52                 printf ("## Unknown FLASH on Bank 0: "
  53                         "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
  54                         flash_info[0].flash_id,
  55                         size_b0, size_b0<<20);
  56         }
  57
  58         /* Remap FLASH according to real size */
  59         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
  60         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | \
  61                                 BR_MS_GPCM | BR_PS_16 | BR_V;
  62
  63         /* Re-do sizing to get full correct info */
  64         size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  65
  66         flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  67
  68         flash_info[0].size = size_b0;
  69
  70 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  71         /* monitor protection ON by default */
  72         flash_protect(FLAG_PROTECT_SET,
  73                       CONFIG_SYS_MONITOR_BASE,
  74                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  75                       &flash_info[0]);
  76 #endif
  77
  78 #ifdef  CONFIG_ENV_IS_IN_FLASH
  79         /* ENV protection ON by default */
  80         flash_protect(FLAG_PROTECT_SET,
  81                       CONFIG_ENV_ADDR,
  82                       CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
  83                       &flash_info[0]);
  84 #endif
  85
  86         return (size_b0);
  87 }
  88
  89 /*-----------------------------------------------------------------------
  90  */
  91 static void flash_get_offsets (ulong base, flash_info_t *info)
  92 {
  93         int i;
  94
  95         if (info->flash_id == FLASH_UNKNOWN) {
  96                 return;
  97         }
  98
  99         switch (info->flash_id & FLASH_VENDMASK) {
 100         case FLASH_MAN_MT:
 101             if (info->flash_id & FLASH_BTYPE) {
 102                 /* set sector offsets for bottom boot block type        */
 103                 info->start[0] = base + 0x00000000;
 104                 info->start[1] = base + 0x00004000;
 105                 info->start[2] = base + 0x00006000;
 106                 info->start[3] = base + 0x00008000;
 107                 for (i = 4; i < info->sector_count; i++) {
 108                         info->start[i] = base + ((i-3) * 0x00020000);
 109                 }
 110             } else {
 111                 /* set sector offsets for top boot block type           */
 112                 i = info->sector_count - 1;
 113                 info->start[i--] = base + info->size - 0x00004000;
 114                 info->start[i--] = base + info->size - 0x00006000;
 115                 info->start[i--] = base + info->size - 0x00008000;
 116                 for (; i >= 0; i--) {
 117                         info->start[i] = base + i * 0x00020000;
 118                 }
 119             }
 120             return;
 121
 122         case FLASH_MAN_SST:
 123             for (i = 0; i < info->sector_count; i++) {
 124                 info->start[i] = base + (i * 0x00002000);
 125             }
 126             return;
 127
 128         case FLASH_MAN_AMD:
 129         case FLASH_MAN_FUJ:
 130
 131             /* set up sector start address table */
 132             if (info->flash_id & FLASH_BTYPE) {
 133                 /* set sector offsets for bottom boot block type        */
 134                 info->start[0] = base + 0x00000000;
 135                 info->start[1] = base + 0x00008000;
 136                 info->start[2] = base + 0x0000C000;
 137                 info->start[3] = base + 0x00010000;
 138                 for (i = 4; i < info->sector_count; i++) {
 139                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 140                 }
 141             } else {
 142                 /* set sector offsets for top boot block type           */
 143                 i = info->sector_count - 1;
 144                 info->start[i--] = base + info->size - 0x00008000;
 145                 info->start[i--] = base + info->size - 0x0000C000;
 146                 info->start[i--] = base + info->size - 0x00010000;
 147                 for (; i >= 0; i--) {
 148                         info->start[i] = base + i * 0x00020000;
 149                 }
 150             }
 151             return;
 152         default:
 153             printf ("Don't know sector ofsets for flash type 0x%lx\n",
 154                 info->flash_id);
 155             return;
 156         }
 157 }
 158
 159 /*-----------------------------------------------------------------------
 160  */
 161 void flash_print_info  (flash_info_t *info)
 162 {
 163         int i;
 164
 165         if (info->flash_id == FLASH_UNKNOWN) {
 166                 printf ("missing or unknown FLASH type\n");
 167                 return;
 168         }
 169
 170         switch (info->flash_id & FLASH_VENDMASK) {
 171         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 172         case FLASH_MAN_FUJ:     printf ("Fujitsu ");            break;
 173         case FLASH_MAN_SST:     printf ("SST ");                break;
 174         case FLASH_MAN_STM:     printf ("STM ");                break;
 175         case FLASH_MAN_MT:      printf ("MT ");                 break;
 176         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 177         default:                printf ("Unknown Vendor ");     break;
 178         }
 179
 180         switch (info->flash_id & FLASH_TYPEMASK) {
 181         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 182                                 break;
 183         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 184                                 break;
 185         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 186                                 break;
 187         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 188                                 break;
 189         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 190                                 break;
 191         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 192                                 break;
 193         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 194                                 break;
 195         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 196                                 break;
 197         case FLASH_SST200A:     printf ("39xF200A (2M = 128K x 16)\n");
 198                                 break;
 199         case FLASH_SST400A:     printf ("39xF400A (4M = 256K x 16)\n");
 200                                 break;
 201         case FLASH_SST800A:     printf ("39xF800A (8M = 512K x 16)\n");
 202                                 break;
 203         case FLASH_STM800AB:    printf ("M29W800AB (8M = 512K x 16)\n");
 204                                 break;
 205         case FLASH_28F008S5:    printf ("28F008S5 (1M = 64K x 16)\n");
 206                                 break;
 207         case FLASH_28F400_T:    printf ("28F400B3 (4Mbit, top boot sector)\n");
 208                                 break;
 209         case FLASH_28F400_B:    printf ("28F400B3 (4Mbit, bottom boot sector)\n");
 210                                 break;
 211         default:                printf ("Unknown Chip Type\n");
 212                                 break;
 213         }
 214
 215         if (info->size >= (1 << 20)) {
 216                 i = 20;
 217         } else {
 218                 i = 10;
 219         }
 220         printf ("  Size: %ld %cB in %d Sectors\n",
 221                 info->size >> i,
 222                 (i == 20) ? 'M' : 'k',
 223                 info->sector_count);
 224
 225         printf ("  Sector Start Addresses:");
 226         for (i=0; i<info->sector_count; ++i) {
 227                 if ((i % 5) == 0)
 228                         printf ("\n   ");
 229                 printf (" %08lX%s",
 230                         info->start[i],
 231                         info->protect[i] ? " (RO)" : "     "
 232                 );
 233         }
 234         printf ("\n");
 235         return;
 236 }
 237
 238 /*-----------------------------------------------------------------------
 239  */
 240
 241
 242 /*-----------------------------------------------------------------------
 243  */
 244
 245 /*
 246  * The following code cannot be run from FLASH!
 247  */
 248
 249 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 250 {
 251         ushort value;
 252         vu_short *saddr = (vu_short *)addr;
 253
 254         /* Read Manufacturer ID */
 255         saddr[0] = 0x0090;
 256         value = saddr[0];
 257
 258         switch (value) {
 259         case (AMD_MANUFACT & 0xFFFF):
 260                 info->flash_id = FLASH_MAN_AMD;
 261                 break;
 262         case (FUJ_MANUFACT & 0xFFFF):
 263                 info->flash_id = FLASH_MAN_FUJ;
 264                 break;
 265         case (SST_MANUFACT & 0xFFFF):
 266                 info->flash_id = FLASH_MAN_SST;
 267                 break;
 268         case (STM_MANUFACT & 0xFFFF):
 269                 info->flash_id = FLASH_MAN_STM;
 270                 break;
 271         case (MT_MANUFACT & 0xFFFF):
 272                 info->flash_id = FLASH_MAN_MT;
 273                 break;
 274         default:
 275                 info->flash_id = FLASH_UNKNOWN;
 276                 info->sector_count = 0;
 277                 info->size = 0;
 278                 saddr[0] = 0x00FF;              /* restore read mode */
 279                 return (0);                     /* no or unknown flash  */
 280         }
 281
 282         value = saddr[1];                       /* device ID            */
 283
 284         switch (value) {
 285         case (AMD_ID_LV400T & 0xFFFF):
 286                 info->flash_id += FLASH_AM400T;
 287                 info->sector_count = 11;
 288                 info->size = 0x00100000;
 289                 break;                          /* => 1 MB              */
 290
 291         case (AMD_ID_LV400B & 0xFFFF):
 292                 info->flash_id += FLASH_AM400B;
 293                 info->sector_count = 11;
 294                 info->size = 0x00100000;
 295                 break;                          /* => 1 MB              */
 296
 297         case (AMD_ID_LV800T & 0xFFFF):
 298                 info->flash_id += FLASH_AM800T;
 299                 info->sector_count = 19;
 300                 info->size = 0x00200000;
 301                 break;                          /* => 2 MB              */
 302
 303         case (AMD_ID_LV800B & 0xFFFF):
 304                 info->flash_id += FLASH_AM800B;
 305                 info->sector_count = 19;
 306                 info->size = 0x00200000;
 307                 break;                          /* => 2 MB              */
 308
 309         case (AMD_ID_LV160T & 0xFFFF):
 310                 info->flash_id += FLASH_AM160T;
 311                 info->sector_count = 35;
 312                 info->size = 0x00400000;
 313                 break;                          /* => 4 MB              */
 314
 315         case (AMD_ID_LV160B & 0xFFFF):
 316                 info->flash_id += FLASH_AM160B;
 317                 info->sector_count = 35;
 318                 info->size = 0x00400000;
 319                 break;                          /* => 4 MB              */
 320 #if 0   /* enable when device IDs are available */
 321         case (AMD_ID_LV320T & 0xFFFF):
 322                 info->flash_id += FLASH_AM320T;
 323                 info->sector_count = 67;
 324                 info->size = 0x00800000;
 325                 break;                          /* => 8 MB              */
 326
 327         case (AMD_ID_LV320B & 0xFFFF):
 328                 info->flash_id += FLASH_AM320B;
 329                 info->sector_count = 67;
 330                 info->size = 0x00800000;
 331                 break;                          /* => 8 MB              */
 332 #endif
 333         case (SST_ID_xF200A & 0xFFFF):
 334                 info->flash_id += FLASH_SST200A;
 335                 info->sector_count = 64;        /* 39xF200A ID ( 2M = 128K x 16 ) */
 336                 info->size = 0x00080000;
 337                 break;
 338         case (SST_ID_xF400A & 0xFFFF):
 339                 info->flash_id += FLASH_SST400A;
 340                 info->sector_count = 128;       /* 39xF400A ID ( 4M = 256K x 16 ) */
 341                 info->size = 0x00100000;
 342                 break;
 343         case (SST_ID_xF800A & 0xFFFF):
 344                 info->flash_id += FLASH_SST800A;
 345                 info->sector_count = 256;       /* 39xF800A ID ( 8M = 512K x 16 ) */
 346                 info->size = 0x00200000;
 347                 break;                          /* => 2 MB              */
 348         case (STM_ID_x800AB & 0xFFFF):
 349                 info->flash_id += FLASH_STM800AB;
 350                 info->sector_count = 19;
 351                 info->size = 0x00200000;
 352                 break;                          /* => 2 MB              */
 353         case (MT_ID_28F400_T & 0xFFFF):
 354                 info->flash_id += FLASH_28F400_T;
 355                 info->sector_count = 7;
 356                 info->size = 0x00080000;
 357                 break;                          /* => 512 kB            */
 358         case (MT_ID_28F400_B & 0xFFFF):
 359                 info->flash_id += FLASH_28F400_B;
 360                 info->sector_count = 7;
 361                 info->size = 0x00080000;
 362                 break;                          /* => 512 kB            */
 363         default:
 364                 info->flash_id = FLASH_UNKNOWN;
 365                 saddr[0] = 0x00FF;              /* restore read mode */
 366                 return (0);                     /* => no or unknown flash */
 367
 368         }
 369
 370         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 371                 printf ("** ERROR: sector count %d > max (%d) **\n",
 372                         info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 373                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 374         }
 375
 376         saddr[0] = 0x00FF;              /* restore read mode */
 377
 378         return (info->size);
 379 }
 380
 381
 382 /*-----------------------------------------------------------------------
 383  */
 384
 385 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 386 {
 387         int flag, prot, sect;
 388         ulong start, now, last;
 389
 390         if ((s_first < 0) || (s_first > s_last)) {
 391                 if (info->flash_id == FLASH_UNKNOWN) {
 392                         printf ("- missing\n");
 393                 } else {
 394                         printf ("- no sectors to erase\n");
 395                 }
 396                 return 1;
 397         }
 398
 399         if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_MT) {
 400                 printf ("Can erase only MT flash types - aborted\n");
 401                 return 1;
 402         }
 403
 404         prot = 0;
 405         for (sect=s_first; sect<=s_last; ++sect) {
 406                 if (info->protect[sect]) {
 407                         prot++;
 408                 }
 409         }
 410
 411         if (prot) {
 412                 printf ("- Warning: %d protected sectors will not be erased!\n",
 413                         prot);
 414         } else {
 415                 printf ("\n");
 416         }
 417
 418         start = get_timer (0);
 419         last  = start;
 420         /* Start erase on unprotected sectors */
 421         for (sect = s_first; sect<=s_last; sect++) {
 422                 if (info->protect[sect] == 0) { /* not protected */
 423                         vu_short *addr = (vu_short *)(info->start[sect]);
 424                         unsigned short status;
 425
 426                         /* Disable interrupts which might cause a timeout here */
 427                         flag = disable_interrupts();
 428
 429                         *addr = 0x0050; /* clear status register */
 430                         *addr = 0x0020; /* erase setup */
 431                         *addr = 0x00D0; /* erase confirm */
 432
 433                         /* re-enable interrupts if necessary */
 434                         if (flag)
 435                                 enable_interrupts();
 436
 437                         /* wait at least 80us - let's wait 1 ms */
 438                         udelay (1000);
 439
 440                         while (((status = *addr) & 0x0080) != 0x0080) {
 441                                 if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 442                                         printf ("Timeout\n");
 443                                         *addr = 0x00FF; /* reset to read mode */
 444                                         return 1;
 445                                 }
 446
 447                                 /* show that we're waiting */
 448                                 if ((now - last) > 1000) {      /* every second */
 449                                         putc ('.');
 450                                         last = now;
 451                                 }
 452                         }
 453
 454                         *addr = 0x00FF; /* reset to read mode */
 455                 }
 456         }
 457         printf (" done\n");
 458         return 0;
 459 }
 460
 461 /*-----------------------------------------------------------------------
 462  * Copy memory to flash, returns:
 463  * 0 - OK
 464  * 1 - write timeout
 465  * 2 - Flash not erased
 466  * 4 - Flash not identified
 467  */
 468
 469 #define FLASH_WIDTH     2       /* flash bus width in bytes */
 470
 471 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 472 {
 473         ulong cp, wp, data;
 474         int i, l, rc;
 475
 476         if (info->flash_id == FLASH_UNKNOWN) {
 477                 return 4;
 478         }
 479
 480         wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH aligned address */
 481
 482         /*
 483          * handle unaligned start bytes
 484          */
 485         if ((l = addr - wp) != 0) {
 486                 data = 0;
 487                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 488                         data = (data << 8) | (*(uchar *)cp);
 489                 }
 490                 for (; i<FLASH_WIDTH && cnt>0; ++i) {
 491                         data = (data << 8) | *src++;
 492                         --cnt;
 493                         ++cp;
 494                 }
 495                 for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
 496                         data = (data << 8) | (*(uchar *)cp);
 497                 }
 498
 499                 if ((rc = write_data(info, wp, data)) != 0) {
 500                         return (rc);
 501                 }
 502                 wp += FLASH_WIDTH;
 503         }
 504
 505         /*
 506          * handle FLASH_WIDTH aligned part
 507          */
 508         while (cnt >= FLASH_WIDTH) {
 509                 data = 0;
 510                 for (i=0; i<FLASH_WIDTH; ++i) {
 511                         data = (data << 8) | *src++;
 512                 }
 513                 if ((rc = write_data(info, wp, data)) != 0) {
 514                         return (rc);
 515                 }
 516                 wp  += FLASH_WIDTH;
 517                 cnt -= FLASH_WIDTH;
 518         }
 519
 520         if (cnt == 0) {
 521                 return (0);
 522         }
 523
 524         /*
 525          * handle unaligned tail bytes
 526          */
 527         data = 0;
 528         for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
 529                 data = (data << 8) | *src++;
 530                 --cnt;
 531         }
 532         for (; i<FLASH_WIDTH; ++i, ++cp) {
 533                 data = (data << 8) | (*(uchar *)cp);
 534         }
 535
 536         return (write_data(info, wp, data));
 537 }
 538
 539 /*-----------------------------------------------------------------------
 540  * Write a word to Flash, returns:
 541  * 0 - OK
 542  * 1 - write timeout
 543  * 2 - Flash not erased
 544  */
 545 static int write_data (flash_info_t *info, ulong dest, ulong data)
 546 {
 547         vu_short *addr = (vu_short *)dest;
 548         ushort sdata = (ushort)data;
 549         ushort status;
 550         ulong start;
 551         int flag;
 552
 553         /* Check if Flash is (sufficiently) erased */
 554         if ((*addr & sdata) != sdata) {
 555                 return (2);
 556         }
 557         /* Disable interrupts which might cause a timeout here */
 558         flag = disable_interrupts();
 559
 560         *addr = 0x0040;         /* write setup */
 561         *addr = sdata;
 562
 563         /* re-enable interrupts if necessary */
 564         if (flag)
 565                 enable_interrupts();
 566
 567         start = get_timer (0);
 568
 569         while (((status = *addr) & 0x0080) != 0x0080) {
 570                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 571                         *addr = 0x00FF; /* restore read mode */
 572                         return (1);
 573                 }
 574         }
 575
 576         *addr = 0x00FF;         /* restore read mode */
 577
 578         return (0);
 579 }
 580
 581 /*-----------------------------------------------------------------------
 582  */