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
  27 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips    */
  28
  29 /*-----------------------------------------------------------------------
  30  * Functions
  31  */
  32 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  33 static int write_byte(flash_info_t * info, ulong dest, uchar data);
  34 static void flash_get_offsets(ulong base, flash_info_t * info);
  35
  36 /*-----------------------------------------------------------------------
  37  */
  38
  39 unsigned long flash_init(void)
  40 {
  41         volatile immap_t *immap = (immap_t *) CFG_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 < CFG_MAX_FLASH_BANKS; ++i) {
  48                 flash_info[i].flash_id = FLASH_UNKNOWN;
  49         }
  50
  51         /* Static FLASH Bank configuration here - FIXME XXX */
  52
  53         size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
  54
  55         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  56                 printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", size, size << 20);
  57         }
  58
  59         /* Remap FLASH according to real size */
  60         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  61         memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  62
  63         /* Re-do sizing to get full correct info */
  64         size = flash_get_size((vu_long *) CFG_FLASH_BASE, &flash_info[0]);
  65
  66         flash_get_offsets(CFG_FLASH_BASE, &flash_info[0]);
  67
  68         /* monitor protection ON by default */
  69         flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
  70
  71         flash_info[0].size = size;
  72
  73         return (size);
  74 }
  75
  76 /*-----------------------------------------------------------------------
  77  */
  78 static void flash_get_offsets(ulong base, flash_info_t * info)
  79 {
  80         int i;
  81
  82         /* set up sector start address table */
  83         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
  84                 for (i = 0; i < info->sector_count; i++) {
  85                         info->start[i] = base + (i * 0x00010000);
  86                 }
  87         } else if (info->flash_id & FLASH_BTYPE) {
  88                 /* set sector offsets for bottom boot block type    */
  89                 info->start[0] = base + 0x00000000;
  90                 info->start[1] = base + 0x00004000;
  91                 info->start[2] = base + 0x00006000;
  92                 info->start[3] = base + 0x00008000;
  93                 for (i = 4; i < info->sector_count; i++) {
  94                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
  95                 }
  96         } else {
  97                 /* set sector offsets for top boot block type       */
  98                 i = info->sector_count - 1;
  99                 info->start[i--] = base + info->size - 0x00004000;
 100                 info->start[i--] = base + info->size - 0x00006000;
 101                 info->start[i--] = base + info->size - 0x00008000;
 102                 for (; i >= 0; i--) {
 103                         info->start[i] = base + i * 0x00010000;
 104                 }
 105         }
 106
 107 }
 108
 109 /*-----------------------------------------------------------------------
 110  */
 111 void flash_print_info(flash_info_t * info)
 112 {
 113         int i;
 114
 115         if (info->flash_id == FLASH_UNKNOWN) {
 116                 printf("missing or unknown FLASH type\n");
 117                 return;
 118         }
 119
 120         switch (info->flash_id & FLASH_VENDMASK) {
 121         case FLASH_MAN_AMD:
 122                 printf("AMD ");
 123                 break;
 124         case FLASH_MAN_FUJ:
 125                 printf("FUJITSU ");
 126                 break;
 127         case FLASH_MAN_MX:
 128                 printf("MXIC ");
 129                 break;
 130         default:
 131                 printf("Unknown Vendor ");
 132                 break;
 133         }
 134
 135         switch (info->flash_id & FLASH_TYPEMASK) {
 136         case FLASH_AM040:
 137                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 138                 break;
 139         case FLASH_AM400B:
 140                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 141                 break;
 142         case FLASH_AM400T:
 143                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 144                 break;
 145         case FLASH_AM800B:
 146                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 147                 break;
 148         case FLASH_AM800T:
 149                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 150                 break;
 151         case FLASH_AM160B:
 152                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 153                 break;
 154         case FLASH_AM160T:
 155                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 156                 break;
 157         case FLASH_AM320B:
 158                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 159                 break;
 160         case FLASH_AM320T:
 161                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 162                 break;
 163         default:
 164                 printf("Unknown Chip Type\n");
 165                 break;
 166         }
 167
 168         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 169
 170         printf("  Sector Start Addresses:");
 171         for (i = 0; i < info->sector_count; ++i) {
 172                 if ((i % 5) == 0)
 173                         printf("\n   ");
 174                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 175         }
 176         printf("\n");
 177 }
 178
 179 /*-----------------------------------------------------------------------
 180  */
 181
 182
 183 /*-----------------------------------------------------------------------
 184  */
 185
 186 /*
 187  * The following code cannot be run from FLASH!
 188  */
 189
 190 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 191 {
 192         short i;
 193         uchar mid;
 194         uchar pid;
 195         vu_char *caddr = (vu_char *) addr;
 196         ulong base = (ulong) addr;
 197
 198
 199         /* Write auto select command: read Manufacturer ID */
 200         caddr[0x0555] = 0xAA;
 201         caddr[0x02AA] = 0x55;
 202         caddr[0x0555] = 0x90;
 203
 204         mid = caddr[0];
 205         switch (mid) {
 206         case (AMD_MANUFACT & 0xFF):
 207                 info->flash_id = FLASH_MAN_AMD;
 208                 break;
 209         case (FUJ_MANUFACT & 0xFF):
 210                 info->flash_id = FLASH_MAN_FUJ;
 211                 break;
 212         case (MX_MANUFACT & 0xFF):
 213                 info->flash_id = FLASH_MAN_MX;
 214                 break;
 215         case (STM_MANUFACT & 0xFF):
 216                 info->flash_id = FLASH_MAN_STM;
 217                 break;
 218         default:
 219                 info->flash_id = FLASH_UNKNOWN;
 220                 info->sector_count = 0;
 221                 info->size = 0;
 222                 return (0);                             /* no or unknown flash  */
 223         }
 224
 225         pid = caddr[1];                         /* device ID        */
 226         switch (pid) {
 227         case (AMD_ID_LV400T & 0xFF):
 228                 info->flash_id += FLASH_AM400T;
 229                 info->sector_count = 11;
 230                 info->size = 0x00080000;
 231                 break;                                  /* => 512 kB        */
 232
 233         case (AMD_ID_LV400B & 0xFF):
 234                 info->flash_id += FLASH_AM400B;
 235                 info->sector_count = 11;
 236                 info->size = 0x00080000;
 237                 break;                                  /* => 512 kB        */
 238
 239         case (AMD_ID_LV800T & 0xFF):
 240                 info->flash_id += FLASH_AM800T;
 241                 info->sector_count = 19;
 242                 info->size = 0x00100000;
 243                 break;                                  /* => 1 MB      */
 244
 245         case (AMD_ID_LV800B & 0xFF):
 246                 info->flash_id += FLASH_AM800B;
 247                 info->sector_count = 19;
 248                 info->size = 0x00100000;
 249                 break;                                  /* => 1 MB      */
 250
 251         case (AMD_ID_LV160T & 0xFF):
 252                 info->flash_id += FLASH_AM160T;
 253                 info->sector_count = 35;
 254                 info->size = 0x00200000;
 255                 break;                                  /* => 2 MB      */
 256
 257         case (AMD_ID_LV160B & 0xFF):
 258                 info->flash_id += FLASH_AM160B;
 259                 info->sector_count = 35;
 260                 info->size = 0x00200000;
 261                 break;                                  /* => 2 MB      */
 262
 263         case (AMD_ID_LV040B & 0xFF):
 264                 info->flash_id += FLASH_AM040;
 265                 info->sector_count = 8;
 266                 info->size = 0x00080000;
 267                 break;
 268
 269         case (STM_ID_M29W040B & 0xFF):
 270                 info->flash_id += FLASH_AM040;
 271                 info->sector_count = 8;
 272                 info->size = 0x00080000;
 273                 break;
 274
 275 #if 0                                                   /* enable when device IDs are available */
 276         case (AMD_ID_LV320T & 0xFF):
 277                 info->flash_id += FLASH_AM320T;
 278                 info->sector_count = 67;
 279                 info->size = 0x00400000;
 280                 break;                                  /* => 4 MB      */
 281
 282         case (AMD_ID_LV320B & 0xFF):
 283                 info->flash_id += FLASH_AM320B;
 284                 info->sector_count = 67;
 285                 info->size = 0x00400000;
 286                 break;                                  /* => 4 MB      */
 287 #endif
 288         default:
 289                 info->flash_id = FLASH_UNKNOWN;
 290                 return (0);                             /* => no or unknown flash */
 291
 292         }
 293
 294         printf(" ");
 295         /* set up sector start address table */
 296         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 297                 for (i = 0; i < info->sector_count; i++) {
 298                         info->start[i] = base + (i * 0x00010000);
 299                 }
 300         } else if (info->flash_id & FLASH_BTYPE) {
 301                 /* set sector offsets for bottom boot block type    */
 302                 info->start[0] = base + 0x00000000;
 303                 info->start[1] = base + 0x00004000;
 304                 info->start[2] = base + 0x00006000;
 305                 info->start[3] = base + 0x00008000;
 306                 for (i = 4; i < info->sector_count; i++) {
 307                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 308                 }
 309         } else {
 310                 /* set sector offsets for top boot block type       */
 311                 i = info->sector_count - 1;
 312                 info->start[i--] = base + info->size - 0x00004000;
 313                 info->start[i--] = base + info->size - 0x00006000;
 314                 info->start[i--] = base + info->size - 0x00008000;
 315                 for (; i >= 0; i--) {
 316                         info->start[i] = base + i * 0x00010000;
 317                 }
 318         }
 319
 320         /* check for protected sectors */
 321         for (i = 0; i < info->sector_count; i++) {
 322                 /* read sector protection: D0 = 1 if protected */
 323                 caddr = (volatile unsigned char *)(info->start[i]);
 324                 info->protect[i] = caddr[2] & 1;
 325         }
 326
 327         /*
 328          * Prevent writes to uninitialized FLASH.
 329          */
 330         if (info->flash_id != FLASH_UNKNOWN) {
 331                 caddr = (vu_char *) info->start[0];
 332
 333                 caddr[0x0555] = 0xAA;
 334                 caddr[0x02AA] = 0x55;
 335                 caddr[0x0555] = 0xF0;
 336
 337                 udelay(20000);
 338         }
 339
 340         return (info->size);
 341 }
 342
 343
 344 /*-----------------------------------------------------------------------
 345  */
 346
 347 int flash_erase(flash_info_t * info, int s_first, int s_last)
 348 {
 349         vu_char *addr = (vu_char *) (info->start[0]);
 350         int flag, prot, sect, l_sect;
 351         ulong start, now, last;
 352
 353         if ((s_first < 0) || (s_first > s_last)) {
 354                 if (info->flash_id == FLASH_UNKNOWN) {
 355                         printf("- missing\n");
 356                 } else {
 357                         printf("- no sectors to erase\n");
 358                 }
 359                 return 1;
 360         }
 361
 362         if ((info->flash_id == FLASH_UNKNOWN) ||
 363             (info->flash_id > FLASH_AMD_COMP)) {
 364                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 365                 return 1;
 366         }
 367
 368         prot = 0;
 369         for (sect = s_first; sect <= s_last; ++sect) {
 370                 if (info->protect[sect]) {
 371                         prot++;
 372                 }
 373         }
 374
 375         if (prot) {
 376                 printf("- Warning: %d protected sectors will not be erased!\n", prot);
 377         } else {
 378                 printf("\n");
 379         }
 380
 381         l_sect = -1;
 382
 383         /* Disable interrupts which might cause a timeout here */
 384         flag = disable_interrupts();
 385
 386         addr[0x0555] = 0xAA;
 387         addr[0x02AA] = 0x55;
 388         addr[0x0555] = 0x80;
 389         addr[0x0555] = 0xAA;
 390         addr[0x02AA] = 0x55;
 391
 392         /* Start erase on unprotected sectors */
 393         for (sect = s_first; sect <= s_last; sect++) {
 394                 if (info->protect[sect] == 0) { /* not protected */
 395                         addr = (vu_char *) (info->start[sect]);
 396                         addr[0] = 0x30;
 397                         l_sect = sect;
 398                 }
 399         }
 400
 401         /* re-enable interrupts if necessary */
 402         if (flag)
 403                 enable_interrupts();
 404
 405         /* wait at least 80us - let's wait 1 ms */
 406         udelay(1000);
 407
 408         /*
 409          * We wait for the last triggered sector
 410          */
 411         if (l_sect < 0)
 412                 goto DONE;
 413
 414         start = get_timer(0);
 415         last = start;
 416         addr = (vu_char *) (info->start[l_sect]);
 417         while ((addr[0] & 0x80) != 0x80) {
 418                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 419                         printf("Timeout\n");
 420                         return 1;
 421                 }
 422                 /* show that we're waiting */
 423                 if ((now - last) > 1000) {      /* every second */
 424                         putc('.');
 425                         last = now;
 426                 }
 427         }
 428
 429   DONE:
 430         /* reset to read mode */
 431         addr = (vu_char *) info->start[0];
 432         addr[0] = 0xF0;                         /* reset bank */
 433
 434         printf(" done\n");
 435         return 0;
 436 }
 437
 438 /*-----------------------------------------------------------------------
 439  * Copy memory to flash, returns:
 440  * 0 - OK
 441  * 1 - write timeout
 442  * 2 - Flash not erased
 443  */
 444
 445 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 446 {
 447         int rc;
 448
 449         while (cnt > 0) {
 450                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
 451                         return (rc);
 452                 }
 453                 --cnt;
 454         }
 455
 456         return (0);
 457 }
 458
 459 /*-----------------------------------------------------------------------
 460  * Write a word to Flash, returns:
 461  * 0 - OK
 462  * 1 - write timeout
 463  * 2 - Flash not erased
 464  */
 465 static int write_byte(flash_info_t * info, ulong dest, uchar data)
 466 {
 467         vu_char *addr = (vu_char *) (info->start[0]);
 468         ulong start;
 469         int flag;
 470
 471         /* Check if Flash is (sufficiently) erased */
 472         if ((*((vu_char *) dest) & data) != data) {
 473                 return (2);
 474         }
 475         /* Disable interrupts which might cause a timeout here */
 476         flag = disable_interrupts();
 477
 478         addr[0x0555] = 0xAA;
 479         addr[0x02AA] = 0x55;
 480         addr[0x0555] = 0xA0;
 481
 482         *((vu_char *) dest) = data;
 483
 484         /* re-enable interrupts if necessary */
 485         if (flag)
 486                 enable_interrupts();
 487
 488         /* data polling for D7 */
 489         start = get_timer(0);
 490         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 491                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 492                         return (1);
 493                 }
 494         }
 495         return (0);
 496 }
 497
 498 /*-----------------------------------------------------------------------
 499  */