LXR uboot/board/netvia/flash.c

   1/*
   2 * (C) Copyright 2000
   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", size, size << 20);
  54        }
  55
  56        /* Remap FLASH according to real size */
  57        memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  58        memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  59
  60        /* Re-do sizing to get full correct info */
  61        size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  62
  63        flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  64
  65        /* monitor protection ON by default */
  66        flash_protect(FLAG_PROTECT_SET,
  67                        CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  68                        &flash_info[0]);
  69
  70        flash_protect ( FLAG_PROTECT_SET,
  71                        CONFIG_ENV_ADDR,
  72                        CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
  73                        &flash_info[0]);
  74
  75#ifdef CONFIG_ENV_ADDR_REDUND
  76        flash_protect ( FLAG_PROTECT_SET,
  77                        CONFIG_ENV_ADDR_REDUND,
  78                        CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
  79                        &flash_info[0]);
  80#endif
  81
  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/*-----------------------------------------------------------------------
 122 */
 123void flash_print_info(flash_info_t * info)
 124{
 125        int i;
 126
 127        if (info->flash_id == FLASH_UNKNOWN) {
 128                printf("missing or unknown FLASH type\n");
 129                return;
 130        }
 131
 132        switch (info->flash_id & FLASH_VENDMASK) {
 133        case FLASH_MAN_AMD:
 134                printf("AMD ");
 135                break;
 136        case FLASH_MAN_FUJ:
 137                printf("FUJITSU ");
 138                break;
 139        case FLASH_MAN_MX:
 140                printf("MXIC ");
 141                break;
 142        default:
 143                printf("Unknown Vendor ");
 144                break;
 145        }
 146
 147        switch (info->flash_id & FLASH_TYPEMASK) {
 148        case FLASH_AM040:
 149                printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 150                break;
 151        case FLASH_AM400B:
 152                printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 153                break;
 154        case FLASH_AM400T:
 155                printf("AM29LV400T (4 Mbit, top boot sector)\n");
 156                break;
 157        case FLASH_AM800B:
 158                printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 159                break;
 160        case FLASH_AM800T:
 161                printf("AM29LV800T (8 Mbit, top boot sector)\n");
 162                break;
 163        case FLASH_AM160B:
 164                printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 165                break;
 166        case FLASH_AM160T:
 167                printf("AM29LV160T (16 Mbit, top boot sector)\n");
 168                break;
 169        case FLASH_AM320B:
 170                printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 171                break;
 172        case FLASH_AM320T:
 173                printf("AM29LV320T (32 Mbit, top boot sector)\n");
 174                break;
 175        default:
 176                printf("Unknown Chip Type\n");
 177                break;
 178        }
 179
 180        printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 181
 182        printf("  Sector Start Addresses:");
 183        for (i = 0; i < info->sector_count; ++i) {
 184                if ((i % 5) == 0)
 185                        printf("\n   ");
 186                printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 187        }
 188        printf("\n");
 189}
 190
 191/*-----------------------------------------------------------------------
 192 */
 193
 194
 195/*-----------------------------------------------------------------------
 196 */
 197
 198/*
 199 * The following code cannot be run from FLASH!
 200 */
 201
 202static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 203{
 204        short i;
 205        uchar mid;
 206        uchar pid;
 207        vu_char *caddr = (vu_char *) addr;
 208        ulong base = (ulong) addr;
 209
 210
 211        /* Write auto select command: read Manufacturer ID */
 212        caddr[0x0555] = 0xAA;
 213        caddr[0x02AA] = 0x55;
 214        caddr[0x0555] = 0x90;
 215
 216        mid = caddr[0];
 217        switch (mid) {
 218        case (AMD_MANUFACT & 0xFF):
 219                info->flash_id = FLASH_MAN_AMD;
 220                break;
 221        case (FUJ_MANUFACT & 0xFF):
 222                info->flash_id = FLASH_MAN_FUJ;
 223                break;
 224        case (MX_MANUFACT & 0xFF):
 225                info->flash_id = FLASH_MAN_MX;
 226                break;
 227        case (STM_MANUFACT & 0xFF):
 228                info->flash_id = FLASH_MAN_STM;
 229                break;
 230        default:
 231                info->flash_id = FLASH_UNKNOWN;
 232                info->sector_count = 0;
 233                info->size = 0;
 234                return (0);                             /* no or unknown flash  */
 235        }
 236
 237        pid = caddr[1];                         /* device ID        */
 238        switch (pid) {
 239        case (AMD_ID_LV400T & 0xFF):
 240                info->flash_id += FLASH_AM400T;
 241                info->sector_count = 11;
 242                info->size = 0x00080000;
 243                break;                                  /* => 512 kB        */
 244
 245        case (AMD_ID_LV400B & 0xFF):
 246                info->flash_id += FLASH_AM400B;
 247                info->sector_count = 11;
 248                info->size = 0x00080000;
 249                break;                                  /* => 512 kB        */
 250
 251        case (AMD_ID_LV800T & 0xFF):
 252                info->flash_id += FLASH_AM800T;
 253                info->sector_count = 19;
 254                info->size = 0x00100000;
 255                break;                                  /* => 1 MB      */
 256
 257        case (AMD_ID_LV800B & 0xFF):
 258                info->flash_id += FLASH_AM800B;
 259                info->sector_count = 19;
 260                info->size = 0x00100000;
 261                break;                                  /* => 1 MB      */
 262
 263        case (AMD_ID_LV160T & 0xFF):
 264                info->flash_id += FLASH_AM160T;
 265                info->sector_count = 35;
 266                info->size = 0x00200000;
 267                break;                                  /* => 2 MB      */
 268
 269        case (AMD_ID_LV160B & 0xFF):
 270                info->flash_id += FLASH_AM160B;
 271                info->sector_count = 35;
 272                info->size = 0x00200000;
 273                break;                                  /* => 2 MB      */
 274
 275        case (AMD_ID_LV040B & 0xFF):
 276                info->flash_id += FLASH_AM040;
 277                info->sector_count = 8;
 278                info->size = 0x00080000;
 279                break;
 280
 281        case (STM_ID_M29W040B & 0xFF):
 282                info->flash_id += FLASH_AM040;
 283                info->sector_count = 8;
 284                info->size = 0x00080000;
 285                break;
 286
 287#if 0                                                   /* enable when device IDs are available */
 288        case (AMD_ID_LV320T & 0xFF):
 289                info->flash_id += FLASH_AM320T;
 290                info->sector_count = 67;
 291                info->size = 0x00400000;
 292                break;                                  /* => 4 MB      */
 293
 294        case (AMD_ID_LV320B & 0xFF):
 295                info->flash_id += FLASH_AM320B;
 296                info->sector_count = 67;
 297                info->size = 0x00400000;
 298                break;                                  /* => 4 MB      */
 299#endif
 300        default:
 301                info->flash_id = FLASH_UNKNOWN;
 302                return (0);                             /* => no or unknown flash */
 303
 304        }
 305
 306        printf(" ");
 307        /* set up sector start address table */
 308        if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 309                for (i = 0; i < info->sector_count; i++) {
 310                        info->start[i] = base + (i * 0x00010000);
 311                }
 312        } else if (info->flash_id & FLASH_BTYPE) {
 313                /* set sector offsets for bottom boot block type    */
 314                info->start[0] = base + 0x00000000;
 315                info->start[1] = base + 0x00004000;
 316                info->start[2] = base + 0x00006000;
 317                info->start[3] = base + 0x00008000;
 318                for (i = 4; i < info->sector_count; i++) {
 319                        info->start[i] = base + (i * 0x00010000) - 0x00030000;
 320                }
 321        } else {
 322                /* set sector offsets for top boot block type       */
 323                i = info->sector_count - 1;
 324                info->start[i--] = base + info->size - 0x00004000;
 325                info->start[i--] = base + info->size - 0x00006000;
 326                info->start[i--] = base + info->size - 0x00008000;
 327                for (; i >= 0; i--) {
 328                        info->start[i] = base + i * 0x00010000;
 329                }
 330        }
 331
 332        /* check for protected sectors */
 333        for (i = 0; i < info->sector_count; i++) {
 334                /* read sector protection: D0 = 1 if protected */
 335                caddr = (volatile unsigned char *)(info->start[i]);
 336                info->protect[i] = caddr[2] & 1;
 337        }
 338
 339        /*
 340         * Prevent writes to uninitialized FLASH.
 341         */
 342        if (info->flash_id != FLASH_UNKNOWN) {
 343                caddr = (vu_char *) info->start[0];
 344
 345                caddr[0x0555] = 0xAA;
 346                caddr[0x02AA] = 0x55;
 347                caddr[0x0555] = 0xF0;
 348
 349                udelay(20000);
 350        }
 351
 352        return (info->size);
 353}
 354
 355
 356/*-----------------------------------------------------------------------
 357 */
 358
 359int flash_erase(flash_info_t * info, int s_first, int s_last)
 360{
 361        vu_char *addr = (vu_char *) (info->start[0]);
 362        int flag, prot, sect, l_sect;
 363        ulong start, now, last;
 364
 365        if ((s_first < 0) || (s_first > s_last)) {
 366                if (info->flash_id == FLASH_UNKNOWN) {
 367                        printf("- missing\n");
 368                } else {
 369                        printf("- no sectors to erase\n");
 370                }
 371                return 1;
 372        }
 373
 374        if ((info->flash_id == FLASH_UNKNOWN) ||
 375            (info->flash_id > FLASH_AMD_COMP)) {
 376                printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 377                return 1;
 378        }
 379
 380        prot = 0;
 381        for (sect = s_first; sect <= s_last; ++sect) {
 382                if (info->protect[sect]) {
 383                        prot++;
 384                }
 385        }
 386
 387        if (prot) {
 388                printf("- Warning: %d protected sectors will not be erased!\n", prot);
 389        } else {
 390                printf("\n");
 391        }
 392
 393        l_sect = -1;
 394
 395        /* Disable interrupts which might cause a timeout here */
 396        flag = disable_interrupts();
 397
 398        addr[0x0555] = 0xAA;
 399        addr[0x02AA] = 0x55;
 400        addr[0x0555] = 0x80;
 401        addr[0x0555] = 0xAA;
 402        addr[0x02AA] = 0x55;
 403
 404        /* Start erase on unprotected sectors */
 405        for (sect = s_first; sect <= s_last; sect++) {
 406                if (info->protect[sect] == 0) { /* not protected */
 407                        addr = (vu_char *) (info->start[sect]);
 408                        addr[0] = 0x30;
 409                        l_sect = sect;
 410                }
 411        }
 412
 413        /* re-enable interrupts if necessary */
 414        if (flag)
 415                enable_interrupts();
 416
 417        /* wait at least 80us - let's wait 1 ms */
 418        udelay(1000);
 419
 420        /*
 421         * We wait for the last triggered sector
 422         */
 423        if (l_sect < 0)
 424                goto DONE;
 425
 426        start = get_timer(0);
 427        last = start;
 428        addr = (vu_char *) (info->start[l_sect]);
 429        while ((addr[0] & 0x80) != 0x80) {
 430                if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 431                        printf("Timeout\n");
 432                        return 1;
 433                }
 434                /* show that we're waiting */
 435                if ((now - last) > 1000) {      /* every second */
 436                        putc('.');
 437                        last = now;
 438                }
 439        }
 440
 441  DONE:
 442        /* reset to read mode */
 443        addr = (vu_char *) info->start[0];
 444        addr[0] = 0xF0;                         /* reset bank */
 445
 446        printf(" done\n");
 447        return 0;
 448}
 449
 450/*-----------------------------------------------------------------------
 451 * Copy memory to flash, returns:
 452 * 0 - OK
 453 * 1 - write timeout
 454 * 2 - Flash not erased
 455 */
 456
 457int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 458{
 459        int rc;
 460
 461        while (cnt > 0) {
 462                if ((rc = write_byte(info, addr++, *src++)) != 0) {
 463                        return (rc);
 464                }
 465                --cnt;
 466        }
 467
 468        return (0);
 469}
 470
 471/*-----------------------------------------------------------------------
 472 * Write a word to Flash, returns:
 473 * 0 - OK
 474 * 1 - write timeout
 475 * 2 - Flash not erased
 476 */
 477static int write_byte(flash_info_t * info, ulong dest, uchar data)
 478{
 479        vu_char *addr = (vu_char *) (info->start[0]);
 480        ulong start;
 481        int flag;
 482
 483        /* Check if Flash is (sufficiently) erased */
 484        if ((*((vu_char *) dest) & data) != data) {
 485                return (2);
 486        }
 487        /* Disable interrupts which might cause a timeout here */
 488        flag = disable_interrupts();
 489
 490        addr[0x0555] = 0xAA;
 491        addr[0x02AA] = 0x55;
 492        addr[0x0555] = 0xA0;
 493
 494        *((vu_char *) dest) = data;
 495
 496        /* re-enable interrupts if necessary */
 497        if (flag)
 498                enable_interrupts();
 499
 500        /* data polling for D7 */
 501        start = get_timer(0);
 502        while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 503                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 504                        return (1);
 505                }
 506        }
 507        return (0);
 508}
 509
 510/*-----------------------------------------------------------------------
 511 */
 512