LXR uboot/board/netta2/flash.c

   1/*
   2 * (C) Copyright 2000-2004
   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/*-----------------------------------------------------------------------
  30 * Functions
  31 */
  32static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  33static int write_byte(flash_info_t * info, ulong dest, uchar data);
  34static void flash_get_offsets(ulong base, flash_info_t * info);
  35
  36/*-----------------------------------------------------------------------
  37 */
  38
  39unsigned long flash_init(void)
  40{
  41        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
  42        volatile memctl8xx_t *memctl = &immap->im_memctl;
  43        unsigned long size;
  44        int i;
  45
  46        /* Init: no FLASHes known */
  47        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  48                flash_info[i].flash_id = FLASH_UNKNOWN;
  49
  50        size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
  51
  52        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  53                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  54                        size, size << 20);
  55        }
  56
  57        /* Remap FLASH according to real size */
  58        memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  59        memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  60
  61        /* Re-do sizing to get full correct info */
  62        size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  63
  64        flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  65
  66        /* monitor protection ON by default */
  67        flash_protect(FLAG_PROTECT_SET,
  68                        CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  69                        &flash_info[0]);
  70
  71        flash_protect ( FLAG_PROTECT_SET,
  72                        CONFIG_ENV_ADDR,
  73                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
  74                        &flash_info[0]);
  75
  76#ifdef CONFIG_ENV_ADDR_REDUND
  77        flash_protect ( FLAG_PROTECT_SET,
  78                        CONFIG_ENV_ADDR_REDUND,
  79                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
  80                        &flash_info[0]);
  81#endif
  82
  83        flash_info[0].size = size;
  84
  85        return (size);
  86}
  87
  88/*-----------------------------------------------------------------------
  89 */
  90static void flash_get_offsets(ulong base, flash_info_t * info)
  91{
  92        int i;
  93
  94        /* set up sector start address table */
  95        if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
  96                for (i = 0; i < info->sector_count; i++) {
  97                        info->start[i] = base + (i * 0x00010000);
  98                }
  99        } else if (info->flash_id & FLASH_BTYPE) {
 100                /* set sector offsets for bottom boot block type    */
 101                info->start[0] = base + 0x00000000;
 102                info->start[1] = base + 0x00004000;
 103                info->start[2] = base + 0x00006000;
 104                info->start[3] = base + 0x00008000;
 105                for (i = 4; i < info->sector_count; i++) {
 106                        info->start[i] = base + (i * 0x00010000) - 0x00030000;
 107                }
 108        } else {
 109                /* set sector offsets for top boot block type       */
 110                i = info->sector_count - 1;
 111                info->start[i--] = base + info->size - 0x00004000;
 112                info->start[i--] = base + info->size - 0x00006000;
 113                info->start[i--] = base + info->size - 0x00008000;
 114                for (; i >= 0; i--) {
 115                        info->start[i] = base + i * 0x00010000;
 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                printf("missing or unknown FLASH type\n");
 128                return;
 129        }
 130
 131        switch (info->flash_id & FLASH_VENDMASK) {
 132        case FLASH_MAN_AMD:
 133                printf("AMD ");
 134                break;
 135        case FLASH_MAN_FUJ:
 136                printf("FUJITSU ");
 137                break;
 138        case FLASH_MAN_MX:
 139                printf("MXIC ");
 140                break;
 141        default:
 142                printf("Unknown Vendor ");
 143                break;
 144        }
 145
 146        switch (info->flash_id & FLASH_TYPEMASK) {
 147        case FLASH_AM040:
 148                printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 149                break;
 150        case FLASH_AM400B:
 151                printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 152                break;
 153        case FLASH_AM400T:
 154                printf("AM29LV400T (4 Mbit, top boot sector)\n");
 155                break;
 156        case FLASH_AM800B:
 157                printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 158                break;
 159        case FLASH_AM800T:
 160                printf("AM29LV800T (8 Mbit, top boot sector)\n");
 161                break;
 162        case FLASH_AM160B:
 163                printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 164                break;
 165        case FLASH_AM160T:
 166                printf("AM29LV160T (16 Mbit, top boot sector)\n");
 167                break;
 168        case FLASH_AM320B:
 169                printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 170                break;
 171        case FLASH_AM320T:
 172                printf("AM29LV320T (32 Mbit, top boot sector)\n");
 173                break;
 174        default:
 175                printf("Unknown Chip Type\n");
 176                break;
 177        }
 178
 179        printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 180
 181        printf("  Sector Start Addresses:");
 182        for (i = 0; i < info->sector_count; ++i) {
 183                if ((i % 5) == 0)
 184                        printf("\n   ");
 185                printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 186        }
 187        printf("\n");
 188}
 189
 190/*-----------------------------------------------------------------------
 191 */
 192
 193
 194/*-----------------------------------------------------------------------
 195 */
 196
 197/*
 198 * The following code cannot be run from FLASH!
 199 */
 200
 201static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 202{
 203        short i;
 204        uchar mid;
 205        uchar pid;
 206        vu_char *caddr = (vu_char *) addr;
 207        ulong base = (ulong) addr;
 208
 209        /* Write auto select command: read Manufacturer ID */
 210        caddr[0x0555] = 0xAA;
 211        caddr[0x02AA] = 0x55;
 212        caddr[0x0555] = 0x90;
 213
 214        mid = caddr[0];
 215        switch (mid) {
 216        case (AMD_MANUFACT & 0xFF):
 217                info->flash_id = FLASH_MAN_AMD;
 218                break;
 219        case (FUJ_MANUFACT & 0xFF):
 220                info->flash_id = FLASH_MAN_FUJ;
 221                break;
 222        case (MX_MANUFACT & 0xFF):
 223                info->flash_id = FLASH_MAN_MX;
 224                break;
 225        case (STM_MANUFACT & 0xFF):
 226                info->flash_id = FLASH_MAN_STM;
 227                break;
 228        default:
 229                info->flash_id = FLASH_UNKNOWN;
 230                info->sector_count = 0;
 231                info->size = 0;
 232                return (0);                             /* no or unknown flash  */
 233        }
 234
 235        pid = caddr[1];                         /* device ID        */
 236        switch (pid) {
 237        case (AMD_ID_LV400T & 0xFF):
 238                info->flash_id += FLASH_AM400T;
 239                info->sector_count = 11;
 240                info->size = 0x00080000;
 241                break;                                  /* => 512 kB        */
 242
 243        case (AMD_ID_LV400B & 0xFF):
 244                info->flash_id += FLASH_AM400B;
 245                info->sector_count = 11;
 246                info->size = 0x00080000;
 247                break;                                  /* => 512 kB        */
 248
 249        case (AMD_ID_LV800T & 0xFF):
 250                info->flash_id += FLASH_AM800T;
 251                info->sector_count = 19;
 252                info->size = 0x00100000;
 253                break;                                  /* => 1 MB      */
 254
 255        case (AMD_ID_LV800B & 0xFF):
 256                info->flash_id += FLASH_AM800B;
 257                info->sector_count = 19;
 258                info->size = 0x00100000;
 259                break;                                  /* => 1 MB      */
 260
 261        case (AMD_ID_LV160T & 0xFF):
 262                info->flash_id += FLASH_AM160T;
 263                info->sector_count = 35;
 264                info->size = 0x00200000;
 265                break;                                  /* => 2 MB      */
 266
 267        case (AMD_ID_LV160B & 0xFF):
 268                info->flash_id += FLASH_AM160B;
 269                info->sector_count = 35;
 270                info->size = 0x00200000;
 271                break;                                  /* => 2 MB      */
 272
 273        case (AMD_ID_LV040B & 0xFF):
 274                info->flash_id += FLASH_AM040;
 275                info->sector_count = 8;
 276                info->size = 0x00080000;
 277                break;
 278
 279        case (STM_ID_M29W040B & 0xFF):
 280                info->flash_id += FLASH_AM040;
 281                info->sector_count = 8;
 282                info->size = 0x00080000;
 283                break;
 284
 285#if 0                                                   /* enable when device IDs are available */
 286        case (AMD_ID_LV320T & 0xFF):
 287                info->flash_id += FLASH_AM320T;
 288                info->sector_count = 67;
 289                info->size = 0x00400000;
 290                break;                                  /* => 4 MB      */
 291
 292        case (AMD_ID_LV320B & 0xFF):
 293                info->flash_id += FLASH_AM320B;
 294                info->sector_count = 67;
 295                info->size = 0x00400000;
 296                break;                                  /* => 4 MB      */
 297#endif
 298        default:
 299                info->flash_id = FLASH_UNKNOWN;
 300                return (0);                             /* => no or unknown flash */
 301
 302        }
 303
 304        printf(" ");
 305        /* set up sector start address table */
 306        if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 307                for (i = 0; i < info->sector_count; i++) {
 308                        info->start[i] = base + (i * 0x00010000);
 309                }
 310        } else if (info->flash_id & FLASH_BTYPE) {
 311                /* set sector offsets for bottom boot block type    */
 312                info->start[0] = base + 0x00000000;
 313                info->start[1] = base + 0x00004000;
 314                info->start[2] = base + 0x00006000;
 315                info->start[3] = base + 0x00008000;
 316                for (i = 4; i < info->sector_count; i++) {
 317                        info->start[i] = base + (i * 0x00010000) - 0x00030000;
 318                }
 319        } else {
 320                /* set sector offsets for top boot block type       */
 321                i = info->sector_count - 1;
 322                info->start[i--] = base + info->size - 0x00004000;
 323                info->start[i--] = base + info->size - 0x00006000;
 324                info->start[i--] = base + info->size - 0x00008000;
 325                for (; i >= 0; i--) {
 326                        info->start[i] = base + i * 0x00010000;
 327                }
 328        }
 329
 330        /* check for protected sectors */
 331        for (i = 0; i < info->sector_count; i++) {
 332                /* read sector protection: D0 = 1 if protected */
 333                caddr = (volatile unsigned char *)(info->start[i]);
 334                info->protect[i] = caddr[2] & 1;
 335        }
 336
 337        /*
 338         * Prevent writes to uninitialized FLASH.
 339         */
 340        if (info->flash_id != FLASH_UNKNOWN) {
 341                caddr = (vu_char *) info->start[0];
 342
 343                caddr[0x0555] = 0xAA;
 344                caddr[0x02AA] = 0x55;
 345                caddr[0x0555] = 0xF0;
 346
 347                udelay(20000);
 348        }
 349
 350        return (info->size);
 351}
 352
 353
 354/*-----------------------------------------------------------------------
 355 */
 356
 357int flash_erase(flash_info_t * info, int s_first, int s_last)
 358{
 359        vu_char *addr = (vu_char *) (info->start[0]);
 360        int flag, prot, sect, l_sect;
 361        ulong start, now, last;
 362
 363        if ((s_first < 0) || (s_first > s_last)) {
 364                if (info->flash_id == FLASH_UNKNOWN) {
 365                        printf("- missing\n");
 366                } else {
 367                        printf("- no sectors to erase\n");
 368                }
 369                return 1;
 370        }
 371
 372        if ((info->flash_id == FLASH_UNKNOWN) ||
 373            (info->flash_id > FLASH_AMD_COMP)) {
 374                printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 375                return 1;
 376        }
 377
 378        prot = 0;
 379        for (sect = s_first; sect <= s_last; ++sect) {
 380                if (info->protect[sect]) {
 381                        prot++;
 382                }
 383        }
 384
 385        if (prot) {
 386                printf("- Warning: %d protected sectors will not be erased!\n", prot);
 387        } else {
 388                printf("\n");
 389        }
 390
 391        l_sect = -1;
 392
 393        /* Disable interrupts which might cause a timeout here */
 394        flag = disable_interrupts();
 395
 396        addr[0x0555] = 0xAA;
 397        addr[0x02AA] = 0x55;
 398        addr[0x0555] = 0x80;
 399        addr[0x0555] = 0xAA;
 400        addr[0x02AA] = 0x55;
 401
 402        /* Start erase on unprotected sectors */
 403        for (sect = s_first; sect <= s_last; sect++) {
 404                if (info->protect[sect] == 0) { /* not protected */
 405                        addr = (vu_char *) (info->start[sect]);
 406                        addr[0] = 0x30;
 407                        l_sect = sect;
 408                }
 409        }
 410
 411        /* re-enable interrupts if necessary */
 412        if (flag)
 413                enable_interrupts();
 414
 415        /* wait at least 80us - let's wait 1 ms */
 416        udelay(1000);
 417
 418        /*
 419         * We wait for the last triggered sector
 420         */
 421        if (l_sect < 0)
 422                goto DONE;
 423
 424        start = get_timer(0);
 425        last = start;
 426        addr = (vu_char *) (info->start[l_sect]);
 427        while ((addr[0] & 0x80) != 0x80) {
 428                if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 429                        printf("Timeout\n");
 430                        return 1;
 431                }
 432                /* show that we're waiting */
 433                if ((now - last) > 1000) {      /* every second */
 434                        putc('.');
 435                        last = now;
 436                }
 437        }
 438
 439DONE:
 440        /* reset to read mode */
 441        addr = (vu_char *) info->start[0];
 442        addr[0] = 0xF0;                         /* reset bank */
 443
 444        printf(" done\n");
 445        return 0;
 446}
 447
 448/*-----------------------------------------------------------------------
 449 * Copy memory to flash, returns:
 450 * 0 - OK
 451 * 1 - write timeout
 452 * 2 - Flash not erased
 453 */
 454
 455int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 456{
 457        int rc;
 458
 459        while (cnt > 0) {
 460                if ((rc = write_byte(info, addr++, *src++)) != 0) {
 461                        return (rc);
 462                }
 463                --cnt;
 464        }
 465
 466        return (0);
 467}
 468
 469/*-----------------------------------------------------------------------
 470 * Write a word to Flash, returns:
 471 * 0 - OK
 472 * 1 - write timeout
 473 * 2 - Flash not erased
 474 */
 475static int write_byte(flash_info_t * info, ulong dest, uchar data)
 476{
 477        vu_char *addr = (vu_char *) (info->start[0]);
 478        ulong start;
 479        int flag;
 480
 481        /* Check if Flash is (sufficiently) erased */
 482        if ((*((vu_char *) dest) & data) != data) {
 483                return (2);
 484        }
 485        /* Disable interrupts which might cause a timeout here */
 486        flag = disable_interrupts();
 487
 488        addr[0x0555] = 0xAA;
 489        addr[0x02AA] = 0x55;
 490        addr[0x0555] = 0xA0;
 491
 492        *((vu_char *) dest) = data;
 493
 494        /* re-enable interrupts if necessary */
 495        if (flag)
 496                enable_interrupts();
 497
 498        /* data polling for D7 */
 499        start = get_timer(0);
 500        while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 501                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 502                        return (1);
 503                }
 504        }
 505        return (0);
 506}
 507