LXR uboot/board/icu862/flash.c

   1/*
   2 * (C) Copyright 2001
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <common.h>
  25#include <mpc8xx.h>
  26
  27flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  28
  29#if defined(CONFIG_ENV_IS_IN_FLASH)
  30# ifndef  CONFIG_ENV_ADDR
  31#  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  32# endif
  33# ifndef  CONFIG_ENV_SIZE
  34#  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  35# endif
  36# ifndef  CONFIG_ENV_SECT_SIZE
  37#  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
  38# endif
  39#endif
  40
  41/*-----------------------------------------------------------------------
  42 * Functions
  43 */
  44static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  45static int write_word (flash_info_t *info, ulong dest, ulong data);
  46static void flash_get_offsets (ulong base, flash_info_t *info);
  47
  48/*-----------------------------------------------------------------------
  49 */
  50
  51unsigned long flash_init (void)
  52{
  53        volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  54        volatile memctl8xx_t *memctl = &immap->im_memctl;
  55        unsigned long size_b0;
  56        int i;
  57
  58        /* Init: no FLASHes known */
  59        for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  60                flash_info[i].flash_id = FLASH_UNKNOWN;
  61
  62        /* Static FLASH Bank configuration here - FIXME XXX */
  63
  64        size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  65
  66        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  67                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  68                        size_b0,
  69                        size_b0 >> 20);
  70        }
  71
  72        /* Remap FLASH according to real size */
  73        memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
  74        memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
  75
  76        /* Re-do sizing to get full correct info */
  77        size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  78
  79        flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  80
  81#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  82        /* monitor protection ON by default */
  83        flash_protect(FLAG_PROTECT_SET,
  84                      CONFIG_SYS_MONITOR_BASE,
  85                      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  86                      &flash_info[0]);
  87#endif
  88
  89#ifdef  CONFIG_ENV_IS_IN_FLASH
  90        /* ENV protection ON by default */
  91        flash_protect(FLAG_PROTECT_SET,
  92                      CONFIG_ENV_ADDR,
  93                      CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  94                      &flash_info[0]);
  95#endif
  96
  97        /* ICU862 Board has only one Flash Bank */
  98        flash_info[0].size = size_b0;
  99
 100        return size_b0;
 101
 102}
 103
 104/*-----------------------------------------------------------------------
 105 */
 106static void flash_get_offsets (ulong base, flash_info_t *info)
 107{
 108        int i;
 109
 110        /* set up sector start address table */
 111        if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
 112                ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM033C)) {
 113                /* set sector offsets for uniform sector type   */
 114                for (i = 0; i < info->sector_count; i++) {
 115                        info->start[i] = base + (i * 0x00040000);
 116                }
 117        }
 118}
 119
 120/*-----------------------------------------------------------------------
 121 */
 122void flash_print_info  (flash_info_t *info)
 123{
 124        int i;
 125
 126        if (info->flash_id == FLASH_UNKNOWN) {
 127                puts ("missing or unknown FLASH type\n");
 128                return;
 129        }
 130
 131        switch (info->flash_id & FLASH_VENDMASK) {
 132        case FLASH_MAN_AMD:     puts ("AMD ");          break;
 133        case FLASH_MAN_FUJ:     puts ("FUJITSU ");      break;
 134        case FLASH_MAN_BM:      puts ("BRIGHT MICRO "); break;
 135        default:                puts ("Unknown Vendor "); break;
 136        }
 137
 138        switch (info->flash_id & FLASH_TYPEMASK) {
 139        case FLASH_AM040:       puts ("29F040/29LV040 (4 Mbit, uniform sectors)\n");
 140                                break;
 141        case FLASH_AM400B:      puts ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 142                                break;
 143        case FLASH_AM400T:      puts ("AM29LV400T (4 Mbit, top boot sector)\n");
 144                                break;
 145        case FLASH_AM800B:      puts ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 146                                break;
 147        case FLASH_AM800T:      puts ("AM29LV800T (8 Mbit, top boot sector)\n");
 148                                break;
 149        case FLASH_AM160B:      puts ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 150                                break;
 151        case FLASH_AM160T:      puts ("AM29LV160T (16 Mbit, top boot sector)\n");
 152                                break;
 153        case FLASH_AM320B:      puts ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 154                                break;
 155        case FLASH_AM320T:      puts ("AM29LV320T (32 Mbit, top boot sector)\n");
 156                                break;
 157        case FLASH_AM033C:      puts ("AM29LV033C (32 Mbit)\n");
 158                                break;
 159        default:                puts ("Unknown Chip Type\n");
 160                                break;
 161        }
 162
 163        printf ("  Size: %ld MB in %d Sectors\n",
 164                info->size >> 20, info->sector_count);
 165
 166        puts ("  Sector Start Addresses:");
 167
 168        for (i=0; i<info->sector_count; ++i) {
 169                if ((i % 5) == 0) {
 170                        puts ("\n   ");
 171                }
 172
 173                printf (" %08lX%s",
 174                        info->start[i],
 175                        info->protect[i] ? " (RO)" : "     "
 176                );
 177        }
 178
 179        puts ("\n");
 180}
 181
 182/*-----------------------------------------------------------------------
 183 */
 184
 185/*
 186 * The following code cannot be run from FLASH!
 187 */
 188
 189static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 190{
 191        short i;
 192#if 0
 193        ulong base = (ulong)addr;
 194#endif
 195        uchar value;
 196
 197        /* Write auto select command: read Manufacturer ID */
 198#if 0
 199        addr[0x0555] = 0x00AA00AA;
 200        addr[0x02AA] = 0x00550055;
 201        addr[0x0555] = 0x00900090;
 202#else
 203        addr[0x0555] = 0xAAAAAAAA;
 204        addr[0x02AA] = 0x55555555;
 205        addr[0x0555] = 0x90909090;
 206#endif
 207
 208        value = addr[0];
 209
 210        switch (value + (value << 16)) {
 211        case AMD_MANUFACT:
 212                info->flash_id = FLASH_MAN_AMD;
 213                break;
 214
 215        case FUJ_MANUFACT:
 216                info->flash_id = FLASH_MAN_FUJ;
 217                break;
 218
 219        default:
 220                info->flash_id = FLASH_UNKNOWN;
 221                info->sector_count = 0;
 222                info->size = 0;
 223                break;
 224        }
 225
 226        value = addr[1];                        /* device ID            */
 227
 228        switch ((unsigned long)value) {
 229        case AMD_ID_F040B:
 230                info->flash_id += FLASH_AM040;
 231                info->sector_count = 8;
 232                info->size = 0x00200000;
 233                break;                          /* => 2 MB              */
 234
 235        case AMD_ID_LV400T:
 236                info->flash_id += FLASH_AM400T;
 237                info->sector_count = 11;
 238                info->size = 0x00100000;
 239                break;                          /* => 1 MB              */
 240
 241        case AMD_ID_LV400B:
 242                info->flash_id += FLASH_AM400B;
 243                info->sector_count = 11;
 244                info->size = 0x00100000;
 245                break;                          /* => 1 MB              */
 246
 247        case AMD_ID_LV800T:
 248                info->flash_id += FLASH_AM800T;
 249                info->sector_count = 19;
 250                info->size = 0x00200000;
 251                break;                          /* => 2 MB              */
 252
 253        case AMD_ID_LV800B:
 254                info->flash_id += FLASH_AM800B;
 255                info->sector_count = 19;
 256                info->size = 0x00200000;
 257                break;                          /* => 2 MB              */
 258
 259        case AMD_ID_LV160T:
 260                info->flash_id += FLASH_AM160T;
 261                info->sector_count = 35;
 262                info->size = 0x00400000;
 263                break;                          /* => 4 MB              */
 264
 265        case AMD_ID_LV160B:
 266                info->flash_id += FLASH_AM160B;
 267                info->sector_count = 35;
 268                info->size = 0x00400000;
 269                break;                          /* => 4 MB              */
 270#if 0   /* enable when device IDs are available */
 271        case AMD_ID_LV320T:
 272                info->flash_id += FLASH_AM320T;
 273                info->sector_count = 67;
 274                info->size = 0x00800000;
 275                break;                          /* => 8 MB              */
 276
 277        case AMD_ID_LV320B:
 278                info->flash_id += FLASH_AM320B;
 279                info->sector_count = 67;
 280                info->size = 0x00800000;
 281                break;                          /* => 8 MB              */
 282#endif
 283        case AMD_ID_LV033C:
 284                info->flash_id += FLASH_AM033C;
 285                info->sector_count = 64;
 286                info->size = 0x01000000;
 287                break;                          /* => 16Mb              */
 288        default:
 289                info->flash_id = FLASH_UNKNOWN;
 290                return (0);                     /* => no or unknown flash */
 291
 292        }
 293
 294#if 0
 295        /* set up sector start address table */
 296        if (info->flash_id & FLASH_BTYPE) {
 297                /* set sector offsets for bottom boot block type        */
 298                info->start[0] = base + 0x00000000;
 299                info->start[1] = base + 0x00008000;
 300                info->start[2] = base + 0x0000C000;
 301                info->start[3] = base + 0x00010000;
 302                for (i = 4; i < info->sector_count; i++) {
 303                        info->start[i] = base + (i * 0x00020000) - 0x00060000;
 304                }
 305        } else {
 306                /* set sector offsets for top boot block type           */
 307                i = info->sector_count - 1;
 308                info->start[i--] = base + info->size - 0x00008000;
 309                info->start[i--] = base + info->size - 0x0000C000;
 310                info->start[i--] = base + info->size - 0x00010000;
 311                for (; i >= 0; i--) {
 312                        info->start[i] = base + i * 0x00020000;
 313                }
 314        }
 315#else
 316        flash_get_offsets ((ulong)addr, &flash_info[0]);
 317#endif
 318
 319        /* check for protected sectors */
 320        for (i = 0; i < info->sector_count; i++) {
 321                /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 322                /* D0 = 1 if protected */
 323                addr = (volatile unsigned long *)(info->start[i]);
 324#if 1
 325                /* We don't know why it happens, but on ICU Board       *
 326                 * for AMD29033C flash we need to resend the command of *
 327                 * reading flash protection for upper 8 Mb of flash     */
 328                if ( i == 32 ) {
 329                        addr[0x0555] = 0xAAAAAAAA;
 330                        addr[0x02AA] = 0x55555555;
 331                        addr[0x0555] = 0x90909090;
 332                }
 333#endif
 334                info->protect[i] = addr[2] & 1;
 335        }
 336
 337        /*
 338         * Prevent writes to uninitialized FLASH.
 339         */
 340        if (info->flash_id != FLASH_UNKNOWN) {
 341                addr = (volatile unsigned long *)info->start[0];
 342#if 0
 343                *addr = 0x00F000F0;     /* reset bank */
 344#else
 345                *addr = 0xF0F0F0F0;     /* reset bank */
 346#endif
 347        }
 348
 349        return (info->size);
 350}
 351
 352
 353/*-----------------------------------------------------------------------
 354 */
 355
 356int     flash_erase (flash_info_t *info, int s_first, int s_last)
 357{
 358        vu_long *addr = (vu_long*)(info->start[0]);
 359        int flag, prot, sect, l_sect;
 360        ulong start, now, last;
 361
 362        if ((s_first < 0) || (s_first > s_last)) {
 363                if (info->flash_id == FLASH_UNKNOWN) {
 364                        puts ("- missing\n");
 365                } else {
 366                        puts ("- no sectors to erase\n");
 367                }
 368                return 1;
 369        }
 370
 371        if ((info->flash_id == FLASH_UNKNOWN) ||
 372            (info->flash_id > FLASH_AMD_COMP)) {
 373                puts ("Can't erase unknown flash type - aborted\n");
 374                return 1;
 375        }
 376
 377        prot = 0;
 378        for (sect=s_first; sect<=s_last; ++sect) {
 379                if (info->protect[sect]) {
 380                        prot++;
 381                }
 382        }
 383
 384        if (prot) {
 385                printf ("- Warning: %d protected sectors will not be erased!\n",
 386                        prot);
 387        } else {
 388                puts ("\n");
 389        }
 390
 391        l_sect = -1;
 392
 393        /* Disable interrupts which might cause a timeout here */
 394        flag = disable_interrupts();
 395
 396#if 0
 397        addr[0x0555] = 0x00AA00AA;
 398        addr[0x02AA] = 0x00550055;
 399        addr[0x0555] = 0x00800080;
 400        addr[0x0555] = 0x00AA00AA;
 401        addr[0x02AA] = 0x00550055;
 402#else
 403        addr[0x0555] = 0xAAAAAAAA;
 404        addr[0x02AA] = 0x55555555;
 405        addr[0x0555] = 0x80808080;
 406        addr[0x0555] = 0xAAAAAAAA;
 407        addr[0x02AA] = 0x55555555;
 408#endif
 409
 410        /* Start erase on unprotected sectors */
 411        for (sect = s_first; sect<=s_last; sect++) {
 412                if (info->protect[sect] == 0) { /* not protected */
 413                        addr = (vu_long*)(info->start[sect]);
 414#if 0
 415                        addr[0] = 0x00300030;
 416#else
 417                        addr[0] = 0x30303030;
 418#endif
 419                        l_sect = sect;
 420                }
 421        }
 422
 423        /* re-enable interrupts if necessary */
 424        if (flag)
 425                enable_interrupts();
 426
 427        /* wait at least 80us - let's wait 1 ms */
 428        udelay (1000);
 429
 430        /*
 431         * We wait for the last triggered sector
 432         */
 433        if (l_sect < 0)
 434                goto DONE;
 435
 436        start = get_timer (0);
 437        last  = start;
 438        addr = (vu_long*)(info->start[l_sect]);
 439#if 0
 440        while ((addr[0] & 0x00800080) != 0x00800080)
 441#else
 442        while ((addr[0] & 0xFFFFFFFF) != 0xFFFFFFFF)
 443#endif
 444        {
 445                if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 446                        puts ("Timeout\n");
 447                        return 1;
 448                }
 449                /* show that we're waiting */
 450                if ((now - last) > 1000) {      /* every second */
 451                        putc ('.');
 452                        last = now;
 453                }
 454        }
 455
 456DONE:
 457        /* reset to read mode */
 458        addr = (volatile unsigned long *)info->start[0];
 459#if 0
 460        addr[0] = 0x00F000F0;   /* reset bank */
 461#else
 462        addr[0] = 0xF0F0F0F0;   /* reset bank */
 463#endif
 464
 465        puts (" done\n");
 466        return 0;
 467}
 468
 469/*-----------------------------------------------------------------------
 470 * Copy memory to flash, returns:
 471 * 0 - OK
 472 * 1 - write timeout
 473 * 2 - Flash not erased
 474 */
 475
 476int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 477{
 478        ulong cp, wp, data;
 479        int i, l, rc;
 480
 481        wp = (addr & ~3);       /* get lower word aligned address */
 482
 483        /*
 484         * handle unaligned start bytes
 485         */
 486        if ((l = addr - wp) != 0) {
 487                data = 0;
 488                for (i=0, cp=wp; i<l; ++i, ++cp) {
 489                        data = (data << 8) | (*(uchar *)cp);
 490                }
 491                for (; i<4 && cnt>0; ++i) {
 492                        data = (data << 8) | *src++;
 493                        --cnt;
 494                        ++cp;
 495                }
 496                for (; cnt==0 && i<4; ++i, ++cp) {
 497                        data = (data << 8) | (*(uchar *)cp);
 498                }
 499
 500                if ((rc = write_word(info, wp, data)) != 0) {
 501                        return (rc);
 502                }
 503                wp += 4;
 504        }
 505
 506        /*
 507         * handle word aligned part
 508         */
 509        while (cnt >= 4) {
 510                data = 0;
 511                for (i=0; i<4; ++i) {
 512                        data = (data << 8) | *src++;
 513                }
 514                if ((rc = write_word(info, wp, data)) != 0) {
 515                        return (rc);
 516                }
 517                wp  += 4;
 518                cnt -= 4;
 519        }
 520
 521        if (cnt == 0) {
 522                return (0);
 523        }
 524
 525        /*
 526         * handle unaligned tail bytes
 527         */
 528        data = 0;
 529        for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 530                data = (data << 8) | *src++;
 531                --cnt;
 532        }
 533        for (; i<4; ++i, ++cp) {
 534                data = (data << 8) | (*(uchar *)cp);
 535        }
 536
 537        return (write_word(info, wp, data));
 538}
 539
 540/*-----------------------------------------------------------------------
 541 * Write a word to Flash, returns:
 542 * 0 - OK
 543 * 1 - write timeout
 544 * 2 - Flash not erased
 545 */
 546static int write_word (flash_info_t *info, ulong dest, ulong data)
 547{
 548        vu_long *addr = (vu_long*)(info->start[0]);
 549        ulong start;
 550        int flag;
 551
 552        /* Check if Flash is (sufficiently) erased */
 553        if ((*((vu_long *)dest) & data) != data) {
 554                return (2);
 555        }
 556        /* Disable interrupts which might cause a timeout here */
 557        flag = disable_interrupts();
 558
 559#if 0
 560        addr[0x0555] = 0x00AA00AA;
 561        addr[0x02AA] = 0x00550055;
 562        addr[0x0555] = 0x00A000A0;
 563#else
 564        addr[0x0555] = 0xAAAAAAAA;
 565        addr[0x02AA] = 0x55555555;
 566        addr[0x0555] = 0xA0A0A0A0;
 567#endif
 568
 569        *((vu_long *)dest) = data;
 570
 571        /* re-enable interrupts if necessary */
 572        if (flag)
 573                enable_interrupts();
 574
 575        /* data polling for D7 */
 576        start = get_timer (0);
 577#if 0
 578        while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080))
 579#else
 580        while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080))
 581#endif
 582        {
 583                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 584                        return (1);
 585                }
 586        }
 587        return (0);
 588}
 589
 590/*-----------------------------------------------------------------------
 591 */
 592