LXR uboot/board/hermes/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
  11flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  12
  13/*-----------------------------------------------------------------------
  14 * Functions
  15 */
  16static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  17static int write_byte (flash_info_t *info, ulong dest, uchar data);
  18static void flash_get_offsets (ulong base, flash_info_t *info);
  19
  20/*-----------------------------------------------------------------------
  21 */
  22
  23unsigned long flash_init (void)
  24{
  25        volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  26        volatile memctl8xx_t *memctl = &immap->im_memctl;
  27        unsigned long size;
  28        int i;
  29
  30        /* Init: no FLASHes known */
  31        for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  32                flash_info[i].flash_id = FLASH_UNKNOWN;
  33        }
  34
  35        /* Static FLASH Bank configuration here - FIXME XXX */
  36
  37        size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  38
  39        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  40                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  41                        size, size<<20);
  42        }
  43
  44        /* Remap FLASH according to real size */
  45        memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  46        memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) |
  47                                (memctl->memc_br0 & ~(BR_BA_MSK));
  48
  49        /* Re-do sizing to get full correct info */
  50        size = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  51
  52        flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  53
  54#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  55        /* monitor protection ON by default */
  56        flash_protect(FLAG_PROTECT_SET,
  57                      CONFIG_SYS_MONITOR_BASE,
  58                      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  59                      &flash_info[0]);
  60#endif
  61
  62        flash_info[0].size = size;
  63
  64        return (size);
  65}
  66
  67/*-----------------------------------------------------------------------
  68 */
  69static void flash_get_offsets (ulong base, flash_info_t *info)
  70{
  71        int i;
  72
  73        /* set up sector start address table */
  74        if (info->flash_id & FLASH_BTYPE) {
  75                /* set sector offsets for bottom boot block type        */
  76                info->start[0] = base + 0x00000000;
  77                info->start[1] = base + 0x00004000;
  78                info->start[2] = base + 0x00006000;
  79                info->start[3] = base + 0x00008000;
  80                for (i = 4; i < info->sector_count; i++) {
  81                        info->start[i] = base + (i * 0x00010000) - 0x00030000;
  82                }
  83        } else {
  84                /* set sector offsets for top boot block type           */
  85                i = info->sector_count - 1;
  86                info->start[i--] = base + info->size - 0x00004000;
  87                info->start[i--] = base + info->size - 0x00006000;
  88                info->start[i--] = base + info->size - 0x00008000;
  89                for (; i >= 0; i--) {
  90                        info->start[i] = base + i * 0x00010000;
  91                }
  92        }
  93
  94}
  95
  96/*-----------------------------------------------------------------------
  97 */
  98void flash_print_info  (flash_info_t *info)
  99{
 100        int i;
 101
 102        if (info->flash_id == FLASH_UNKNOWN) {
 103                printf ("missing or unknown FLASH type\n");
 104                return;
 105        }
 106
 107        switch (info->flash_id & FLASH_VENDMASK) {
 108        case FLASH_MAN_AMD:     printf ("AMD ");                break;
 109        case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 110        default:                printf ("Unknown Vendor ");     break;
 111        }
 112
 113        switch (info->flash_id & FLASH_TYPEMASK) {
 114        case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 115                                break;
 116        case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 117                                break;
 118        case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 119                                break;
 120        case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 121                                break;
 122        case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 123                                break;
 124        case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 125                                break;
 126        case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 127                                break;
 128        case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 129                                break;
 130        default:                printf ("Unknown Chip Type\n");
 131                                break;
 132        }
 133
 134        printf ("  Size: %ld MB in %d Sectors\n",
 135                info->size >> 20, info->sector_count);
 136
 137        printf ("  Sector Start Addresses:");
 138        for (i=0; i<info->sector_count; ++i) {
 139                if ((i % 5) == 0)
 140                        printf ("\n   ");
 141                printf (" %08lX%s",
 142                        info->start[i],
 143                        info->protect[i] ? " (RO)" : "     "
 144                );
 145        }
 146        printf ("\n");
 147        return;
 148}
 149
 150/*-----------------------------------------------------------------------
 151 */
 152
 153
 154/*-----------------------------------------------------------------------
 155 */
 156
 157/*
 158 * The following code cannot be run from FLASH!
 159 */
 160
 161static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 162{
 163        short i;
 164        uchar value;
 165        vu_char *caddr = (vu_char *)addr;
 166        ulong base = (ulong)addr;
 167
 168
 169        /* Write auto select command: read Manufacturer ID */
 170        caddr[0x0AAA] = 0xAA;
 171        caddr[0x0555] = 0x55;
 172        caddr[0x0AAA] = 0x90;
 173
 174        value = caddr[0];
 175        switch (value) {
 176        case (AMD_MANUFACT & 0xFF):
 177                info->flash_id = FLASH_MAN_AMD;
 178                break;
 179        case (FUJ_MANUFACT & 0xFF):
 180                info->flash_id = FLASH_MAN_FUJ;
 181                break;
 182        default:
 183                info->flash_id = FLASH_UNKNOWN;
 184                info->sector_count = 0;
 185                info->size = 0;
 186                return (0);                     /* no or unknown flash  */
 187        }
 188
 189        value = caddr[2];                       /* device ID            */
 190
 191        switch (value) {
 192        case (AMD_ID_LV400T & 0xFF):
 193                info->flash_id += FLASH_AM400T;
 194                info->sector_count = 11;
 195                info->size = 0x00080000;
 196                break;                          /* => 512 kB            */
 197
 198        case (AMD_ID_LV400B & 0xFF):
 199                info->flash_id += FLASH_AM400B;
 200                info->sector_count = 11;
 201                info->size = 0x00080000;
 202                break;                          /* => 512 kB            */
 203
 204        case (AMD_ID_LV800T & 0xFF):
 205                info->flash_id += FLASH_AM800T;
 206                info->sector_count = 19;
 207                info->size = 0x00100000;
 208                break;                          /* => 1 MB              */
 209
 210        case (AMD_ID_LV800B & 0xFF):
 211                info->flash_id += FLASH_AM800B;
 212                info->sector_count = 19;
 213                info->size = 0x00100000;
 214                break;                          /* => 1 MB              */
 215
 216        case (AMD_ID_LV160T & 0xFF):
 217                info->flash_id += FLASH_AM160T;
 218                info->sector_count = 35;
 219                info->size = 0x00200000;
 220                break;                          /* => 2 MB              */
 221
 222        case (AMD_ID_LV160B & 0xFF):
 223                info->flash_id += FLASH_AM160B;
 224                info->sector_count = 35;
 225                info->size = 0x00200000;
 226                break;                          /* => 2 MB              */
 227#if 0   /* enable when device IDs are available */
 228        case (AMD_ID_LV320T & 0xFF):
 229                info->flash_id += FLASH_AM320T;
 230                info->sector_count = 67;
 231                info->size = 0x00400000;
 232                break;                          /* => 4 MB              */
 233
 234        case (AMD_ID_LV320B & 0xFF):
 235                info->flash_id += FLASH_AM320B;
 236                info->sector_count = 67;
 237                info->size = 0x00400000;
 238                break;                          /* => 4 MB              */
 239#endif
 240        default:
 241                info->flash_id = FLASH_UNKNOWN;
 242                return (0);                     /* => no or unknown flash */
 243
 244        }
 245
 246        /* set up sector start address table */
 247        if (info->flash_id & FLASH_BTYPE) {
 248                /* set sector offsets for bottom boot block type        */
 249                info->start[0] = base + 0x00000000;
 250                info->start[1] = base + 0x00004000;
 251                info->start[2] = base + 0x00006000;
 252                info->start[3] = base + 0x00008000;
 253                for (i = 4; i < info->sector_count; i++) {
 254                        info->start[i] = base + (i * 0x00010000) - 0x00030000;
 255                }
 256        } else {
 257                /* set sector offsets for top boot block type           */
 258                i = info->sector_count - 1;
 259                info->start[i--] = base + info->size - 0x00004000;
 260                info->start[i--] = base + info->size - 0x00006000;
 261                info->start[i--] = base + info->size - 0x00008000;
 262                for (; i >= 0; i--) {
 263                        info->start[i] = base + i * 0x00010000;
 264                }
 265        }
 266
 267        /* check for protected sectors */
 268        for (i = 0; i < info->sector_count; i++) {
 269                /* read sector protection: D0 = 1 if protected */
 270                caddr = (volatile unsigned char *)(info->start[i]);
 271                info->protect[i] = caddr[4] & 1;
 272        }
 273
 274        /*
 275         * Prevent writes to uninitialized FLASH.
 276         */
 277        if (info->flash_id != FLASH_UNKNOWN) {
 278                caddr = (vu_char *)info->start[0];
 279
 280                *caddr = 0xF0;  /* reset bank */
 281        }
 282
 283        return (info->size);
 284}
 285
 286
 287/*-----------------------------------------------------------------------
 288 */
 289
 290int     flash_erase (flash_info_t *info, int s_first, int s_last)
 291{
 292        vu_char *addr = (vu_char*)(info->start[0]);
 293        int flag, prot, sect, l_sect;
 294        ulong start, now, last;
 295
 296        if ((s_first < 0) || (s_first > s_last)) {
 297                if (info->flash_id == FLASH_UNKNOWN) {
 298                        printf ("- missing\n");
 299                } else {
 300                        printf ("- no sectors to erase\n");
 301                }
 302                return 1;
 303        }
 304
 305        if ((info->flash_id == FLASH_UNKNOWN) ||
 306            (info->flash_id > FLASH_AMD_COMP)) {
 307                printf ("Can't erase unknown flash type %08lx - aborted\n",
 308                        info->flash_id);
 309                return 1;
 310        }
 311
 312        prot = 0;
 313        for (sect=s_first; sect<=s_last; ++sect) {
 314                if (info->protect[sect]) {
 315                        prot++;
 316                }
 317        }
 318
 319        if (prot) {
 320                printf ("- Warning: %d protected sectors will not be erased!\n",
 321                        prot);
 322        } else {
 323                printf ("\n");
 324        }
 325
 326        l_sect = -1;
 327
 328        /* Disable interrupts which might cause a timeout here */
 329        flag = disable_interrupts();
 330
 331        addr[0x0AAA] = 0xAA;
 332        addr[0x0555] = 0x55;
 333        addr[0x0AAA] = 0x80;
 334        addr[0x0AAA] = 0xAA;
 335        addr[0x0555] = 0x55;
 336
 337        /* Start erase on unprotected sectors */
 338        for (sect = s_first; sect<=s_last; sect++) {
 339                if (info->protect[sect] == 0) { /* not protected */
 340                        addr = (vu_char*)(info->start[sect]);
 341                        addr[0] = 0x30;
 342                        l_sect = sect;
 343                }
 344        }
 345
 346        /* re-enable interrupts if necessary */
 347        if (flag)
 348                enable_interrupts();
 349
 350        /* wait at least 80us - let's wait 1 ms */
 351        udelay (1000);
 352
 353        /*
 354         * We wait for the last triggered sector
 355         */
 356        if (l_sect < 0)
 357                goto DONE;
 358
 359        start = get_timer (0);
 360        last  = start;
 361        addr = (vu_char*)(info->start[l_sect]);
 362        while ((addr[0] & 0x80) != 0x80) {
 363                if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 364                        printf ("Timeout\n");
 365                        return 1;
 366                }
 367                /* show that we're waiting */
 368                if ((now - last) > 1000) {      /* every second */
 369                        putc ('.');
 370                        last = now;
 371                }
 372        }
 373
 374DONE:
 375        /* reset to read mode */
 376        addr = (vu_char *)info->start[0];
 377        addr[0] = 0xF0; /* reset bank */
 378
 379        printf (" done\n");
 380        return 0;
 381}
 382
 383/*-----------------------------------------------------------------------
 384 * Copy memory to flash, returns:
 385 * 0 - OK
 386 * 1 - write timeout
 387 * 2 - Flash not erased
 388 */
 389
 390int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 391{
 392        int rc;
 393
 394        while (cnt > 0) {
 395                if ((rc = write_byte(info, addr++, *src++)) != 0) {
 396                        return (rc);
 397                }
 398                --cnt;
 399        }
 400
 401        return (0);
 402}
 403
 404/*-----------------------------------------------------------------------
 405 * Write a word to Flash, returns:
 406 * 0 - OK
 407 * 1 - write timeout
 408 * 2 - Flash not erased
 409 */
 410static int write_byte (flash_info_t *info, ulong dest, uchar data)
 411{
 412        vu_char *addr = (vu_char*)(info->start[0]);
 413        ulong start;
 414        int flag;
 415
 416        /* Check if Flash is (sufficiently) erased */
 417        if ((*((vu_char *)dest) & data) != data) {
 418                return (2);
 419        }
 420        /* Disable interrupts which might cause a timeout here */
 421        flag = disable_interrupts();
 422
 423        addr[0x0AAA] = 0xAA;
 424        addr[0x0555] = 0x55;
 425        addr[0x0AAA] = 0xA0;
 426
 427        *((vu_char *)dest) = data;
 428
 429        /* re-enable interrupts if necessary */
 430        if (flag)
 431                enable_interrupts();
 432
 433        /* data polling for D7 */
 434        start = get_timer (0);
 435        while ((*((vu_char *)dest) & 0x80) != (data & 0x80)) {
 436                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 437                        return (1);
 438                }
 439        }
 440        return (0);
 441}
 442
 443/*-----------------------------------------------------------------------
 444 */
 445