board/netphone/flash.c

   1 /*
   2  * (C) Copyright 2000-2004
   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 /*-----------------------------------------------------------------------
  14  * Functions
  15  */
  16 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  17 static int write_byte(flash_info_t * info, ulong dest, uchar data);
  18 static void flash_get_offsets(ulong base, flash_info_t * info);
  19
  20 /*-----------------------------------------------------------------------
  21  */
  22
  23 unsigned 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 #if CONFIG_NETPHONE_VERSION == 2
  29         unsigned long size1;
  30 #endif
  31         int i;
  32
  33         /* Init: no FLASHes known */
  34         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  35                 flash_info[i].flash_id = FLASH_UNKNOWN;
  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) | (memctl->memc_br0 & ~(BR_BA_MSK));
  47
  48         /* Re-do sizing to get full correct info */
  49         size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  50
  51         flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  52
  53         /* monitor protection ON by default */
  54         flash_protect(FLAG_PROTECT_SET,
  55                         CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  56                         &flash_info[0]);
  57
  58         flash_protect ( FLAG_PROTECT_SET,
  59                         CONFIG_ENV_ADDR,
  60                         CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
  61                         &flash_info[0]);
  62
  63 #ifdef CONFIG_ENV_ADDR_REDUND
  64         flash_protect ( FLAG_PROTECT_SET,
  65                         CONFIG_ENV_ADDR_REDUND,
  66                         CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
  67                         &flash_info[0]);
  68 #endif
  69
  70         flash_info[0].size = size;
  71
  72 #if CONFIG_NETPHONE_VERSION == 2
  73         size1 = flash_get_size((vu_long *) FLASH_BASE4_PRELIM, &flash_info[1]);
  74         if (size1 > 0) {
  75                 if (flash_info[1].flash_id == FLASH_UNKNOWN)
  76                         printf("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n", size1, size1 << 20);
  77
  78                 /* Remap FLASH according to real size */
  79                 memctl->memc_or4 = CONFIG_SYS_OR_TIMING_FLASH | (-size1 & 0xFFFF8000);
  80                 memctl->memc_br4 = (CONFIG_SYS_FLASH_BASE4 & BR_BA_MSK) | (memctl->memc_br4 & ~(BR_BA_MSK));
  81
  82                 /* Re-do sizing to get full correct info */
  83                 size1 = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE4, &flash_info[1]);
  84
  85                 flash_get_offsets(CONFIG_SYS_FLASH_BASE4, &flash_info[1]);
  86
  87                 size += size1;
  88         } else
  89                 memctl->memc_br4 &= ~BR_V;
  90 #endif
  91
  92         return (size);
  93 }
  94
  95 /*-----------------------------------------------------------------------
  96  */
  97 static void flash_get_offsets(ulong base, flash_info_t * info)
  98 {
  99         int i;
 100
 101         /* set up sector start address table */
 102         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 103                 for (i = 0; i < info->sector_count; i++) {
 104                         info->start[i] = base + (i * 0x00010000);
 105                 }
 106         } else if (info->flash_id & FLASH_BTYPE) {
 107                 /* set sector offsets for bottom boot block type    */
 108                 info->start[0] = base + 0x00000000;
 109                 info->start[1] = base + 0x00004000;
 110                 info->start[2] = base + 0x00006000;
 111                 info->start[3] = base + 0x00008000;
 112                 for (i = 4; i < info->sector_count; i++) {
 113                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 114                 }
 115         } else {
 116                 /* set sector offsets for top boot block type       */
 117                 i = info->sector_count - 1;
 118                 info->start[i--] = base + info->size - 0x00004000;
 119                 info->start[i--] = base + info->size - 0x00006000;
 120                 info->start[i--] = base + info->size - 0x00008000;
 121                 for (; i >= 0; i--) {
 122                         info->start[i] = base + i * 0x00010000;
 123                 }
 124         }
 125 }
 126
 127 /*-----------------------------------------------------------------------
 128  */
 129 void flash_print_info(flash_info_t * info)
 130 {
 131         int i;
 132
 133         if (info->flash_id == FLASH_UNKNOWN) {
 134                 printf("missing or unknown FLASH type\n");
 135                 return;
 136         }
 137
 138         switch (info->flash_id & FLASH_VENDMASK) {
 139         case FLASH_MAN_AMD:
 140                 printf("AMD ");
 141                 break;
 142         case FLASH_MAN_FUJ:
 143                 printf("FUJITSU ");
 144                 break;
 145         case FLASH_MAN_MX:
 146                 printf("MXIC ");
 147                 break;
 148         default:
 149                 printf("Unknown Vendor ");
 150                 break;
 151         }
 152
 153         switch (info->flash_id & FLASH_TYPEMASK) {
 154         case FLASH_AM040:
 155                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 156                 break;
 157         case FLASH_AM400B:
 158                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 159                 break;
 160         case FLASH_AM400T:
 161                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 162                 break;
 163         case FLASH_AM800B:
 164                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 165                 break;
 166         case FLASH_AM800T:
 167                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 168                 break;
 169         case FLASH_AM160B:
 170                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 171                 break;
 172         case FLASH_AM160T:
 173                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 174                 break;
 175         case FLASH_AM320B:
 176                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 177                 break;
 178         case FLASH_AM320T:
 179                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 180                 break;
 181         default:
 182                 printf("Unknown Chip Type\n");
 183                 break;
 184         }
 185
 186         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 187
 188         printf("  Sector Start Addresses:");
 189         for (i = 0; i < info->sector_count; ++i) {
 190                 if ((i % 5) == 0)
 191                         printf("\n   ");
 192                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 193         }
 194         printf("\n");
 195 }
 196
 197 /*-----------------------------------------------------------------------
 198  */
 199
 200
 201 /*-----------------------------------------------------------------------
 202  */
 203
 204 /*
 205  * The following code cannot be run from FLASH!
 206  */
 207
 208 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 209 {
 210         short i;
 211         uchar mid;
 212         uchar pid;
 213         vu_char *caddr = (vu_char *) addr;
 214         ulong base = (ulong) addr;
 215
 216         /* Write auto select command: read Manufacturer ID */
 217         caddr[0x0555] = 0xAA;
 218         caddr[0x02AA] = 0x55;
 219         caddr[0x0555] = 0x90;
 220
 221         mid = caddr[0];
 222         switch (mid) {
 223         case (AMD_MANUFACT & 0xFF):
 224                 info->flash_id = FLASH_MAN_AMD;
 225                 break;
 226         case (FUJ_MANUFACT & 0xFF):
 227                 info->flash_id = FLASH_MAN_FUJ;
 228                 break;
 229         case (MX_MANUFACT & 0xFF):
 230                 info->flash_id = FLASH_MAN_MX;
 231                 break;
 232         case (STM_MANUFACT & 0xFF):
 233                 info->flash_id = FLASH_MAN_STM;
 234                 break;
 235         default:
 236                 info->flash_id = FLASH_UNKNOWN;
 237                 info->sector_count = 0;
 238                 info->size = 0;
 239                 return (0);                             /* no or unknown flash  */
 240         }
 241
 242         pid = caddr[1];                         /* device ID        */
 243         switch (pid) {
 244         case (AMD_ID_LV400T & 0xFF):
 245                 info->flash_id += FLASH_AM400T;
 246                 info->sector_count = 11;
 247                 info->size = 0x00080000;
 248                 break;                                  /* => 512 kB        */
 249
 250         case (AMD_ID_LV400B & 0xFF):
 251                 info->flash_id += FLASH_AM400B;
 252                 info->sector_count = 11;
 253                 info->size = 0x00080000;
 254                 break;                                  /* => 512 kB        */
 255
 256         case (AMD_ID_LV800T & 0xFF):
 257                 info->flash_id += FLASH_AM800T;
 258                 info->sector_count = 19;
 259                 info->size = 0x00100000;
 260                 break;                                  /* => 1 MB      */
 261
 262         case (AMD_ID_LV800B & 0xFF):
 263                 info->flash_id += FLASH_AM800B;
 264                 info->sector_count = 19;
 265                 info->size = 0x00100000;
 266                 break;                                  /* => 1 MB      */
 267
 268         case (AMD_ID_LV160T & 0xFF):
 269                 info->flash_id += FLASH_AM160T;
 270                 info->sector_count = 35;
 271                 info->size = 0x00200000;
 272                 break;                                  /* => 2 MB      */
 273
 274         case (AMD_ID_LV160B & 0xFF):
 275                 info->flash_id += FLASH_AM160B;
 276                 info->sector_count = 35;
 277                 info->size = 0x00200000;
 278                 break;                                  /* => 2 MB      */
 279
 280         case (AMD_ID_LV040B & 0xFF):
 281                 info->flash_id += FLASH_AM040;
 282                 info->sector_count = 8;
 283                 info->size = 0x00080000;
 284                 break;
 285
 286         case (STM_ID_M29W040B & 0xFF):
 287                 info->flash_id += FLASH_AM040;
 288                 info->sector_count = 8;
 289                 info->size = 0x00080000;
 290                 break;
 291
 292 #if 0                                                   /* enable when device IDs are available */
 293         case (AMD_ID_LV320T & 0xFF):
 294                 info->flash_id += FLASH_AM320T;
 295                 info->sector_count = 67;
 296                 info->size = 0x00400000;
 297                 break;                                  /* => 4 MB      */
 298
 299         case (AMD_ID_LV320B & 0xFF):
 300                 info->flash_id += FLASH_AM320B;
 301                 info->sector_count = 67;
 302                 info->size = 0x00400000;
 303                 break;                                  /* => 4 MB      */
 304 #endif
 305         default:
 306                 info->flash_id = FLASH_UNKNOWN;
 307                 return (0);                             /* => no or unknown flash */
 308
 309         }
 310
 311         printf(" ");
 312         /* set up sector start address table */
 313         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 314                 for (i = 0; i < info->sector_count; i++) {
 315                         info->start[i] = base + (i * 0x00010000);
 316                 }
 317         } else if (info->flash_id & FLASH_BTYPE) {
 318                 /* set sector offsets for bottom boot block type    */
 319                 info->start[0] = base + 0x00000000;
 320                 info->start[1] = base + 0x00004000;
 321                 info->start[2] = base + 0x00006000;
 322                 info->start[3] = base + 0x00008000;
 323                 for (i = 4; i < info->sector_count; i++) {
 324                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 325                 }
 326         } else {
 327                 /* set sector offsets for top boot block type       */
 328                 i = info->sector_count - 1;
 329                 info->start[i--] = base + info->size - 0x00004000;
 330                 info->start[i--] = base + info->size - 0x00006000;
 331                 info->start[i--] = base + info->size - 0x00008000;
 332                 for (; i >= 0; i--) {
 333                         info->start[i] = base + i * 0x00010000;
 334                 }
 335         }
 336
 337         /* check for protected sectors */
 338         for (i = 0; i < info->sector_count; i++) {
 339                 /* read sector protection: D0 = 1 if protected */
 340                 caddr = (volatile unsigned char *)(info->start[i]);
 341                 info->protect[i] = caddr[2] & 1;
 342         }
 343
 344         /*
 345          * Prevent writes to uninitialized FLASH.
 346          */
 347         if (info->flash_id != FLASH_UNKNOWN) {
 348                 caddr = (vu_char *) info->start[0];
 349
 350                 caddr[0x0555] = 0xAA;
 351                 caddr[0x02AA] = 0x55;
 352                 caddr[0x0555] = 0xF0;
 353
 354                 udelay(20000);
 355         }
 356
 357         return (info->size);
 358 }
 359
 360
 361 /*-----------------------------------------------------------------------
 362  */
 363
 364 int flash_erase(flash_info_t * info, int s_first, int s_last)
 365 {
 366         vu_char *addr = (vu_char *) (info->start[0]);
 367         int flag, prot, sect, l_sect;
 368         ulong start, now, last;
 369
 370         if ((s_first < 0) || (s_first > s_last)) {
 371                 if (info->flash_id == FLASH_UNKNOWN) {
 372                         printf("- missing\n");
 373                 } else {
 374                         printf("- no sectors to erase\n");
 375                 }
 376                 return 1;
 377         }
 378
 379         if ((info->flash_id == FLASH_UNKNOWN) ||
 380             (info->flash_id > FLASH_AMD_COMP)) {
 381                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 382                 return 1;
 383         }
 384
 385         prot = 0;
 386         for (sect = s_first; sect <= s_last; ++sect) {
 387                 if (info->protect[sect]) {
 388                         prot++;
 389                 }
 390         }
 391
 392         if (prot) {
 393                 printf("- Warning: %d protected sectors will not be erased!\n", prot);
 394         } else {
 395                 printf("\n");
 396         }
 397
 398         l_sect = -1;
 399
 400         /* Disable interrupts which might cause a timeout here */
 401         flag = disable_interrupts();
 402
 403         addr[0x0555] = 0xAA;
 404         addr[0x02AA] = 0x55;
 405         addr[0x0555] = 0x80;
 406         addr[0x0555] = 0xAA;
 407         addr[0x02AA] = 0x55;
 408
 409         /* Start erase on unprotected sectors */
 410         for (sect = s_first; sect <= s_last; sect++) {
 411                 if (info->protect[sect] == 0) { /* not protected */
 412                         addr = (vu_char *) (info->start[sect]);
 413                         addr[0] = 0x30;
 414                         l_sect = sect;
 415                 }
 416         }
 417
 418         /* re-enable interrupts if necessary */
 419         if (flag)
 420                 enable_interrupts();
 421
 422         /* wait at least 80us - let's wait 1 ms */
 423         udelay(1000);
 424
 425         /*
 426          * We wait for the last triggered sector
 427          */
 428         if (l_sect < 0)
 429                 goto DONE;
 430
 431         start = get_timer(0);
 432         last = start;
 433         addr = (vu_char *) (info->start[l_sect]);
 434         while ((addr[0] & 0x80) != 0x80) {
 435                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 436                         printf("Timeout\n");
 437                         return 1;
 438                 }
 439                 /* show that we're waiting */
 440                 if ((now - last) > 1000) {      /* every second */
 441                         putc('.');
 442                         last = now;
 443                 }
 444         }
 445
 446 DONE:
 447         /* reset to read mode */
 448         addr = (vu_char *) info->start[0];
 449         addr[0] = 0xF0;                         /* reset bank */
 450
 451         printf(" done\n");
 452         return 0;
 453 }
 454
 455 /*-----------------------------------------------------------------------
 456  * Copy memory to flash, returns:
 457  * 0 - OK
 458  * 1 - write timeout
 459  * 2 - Flash not erased
 460  */
 461
 462 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 463 {
 464         int rc;
 465
 466         while (cnt > 0) {
 467                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
 468                         return (rc);
 469                 }
 470                 --cnt;
 471         }
 472
 473         return (0);
 474 }
 475
 476 /*-----------------------------------------------------------------------
 477  * Write a word to Flash, returns:
 478  * 0 - OK
 479  * 1 - write timeout
 480  * 2 - Flash not erased
 481  */
 482 static int write_byte(flash_info_t * info, ulong dest, uchar data)
 483 {
 484         vu_char *addr = (vu_char *) (info->start[0]);
 485         ulong start;
 486         int flag;
 487
 488         /* Check if Flash is (sufficiently) erased */
 489         if ((*((vu_char *) dest) & data) != data) {
 490                 return (2);
 491         }
 492         /* Disable interrupts which might cause a timeout here */
 493         flag = disable_interrupts();
 494
 495         addr[0x0555] = 0xAA;
 496         addr[0x02AA] = 0x55;
 497         addr[0x0555] = 0xA0;
 498
 499         *((vu_char *) dest) = data;
 500
 501         /* re-enable interrupts if necessary */
 502         if (flag)
 503                 enable_interrupts();
 504
 505         /* data polling for D7 */
 506         start = get_timer(0);
 507         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 508                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 509                         return (1);
 510                 }
 511         }
 512         return (0);
 513 }