board/netphone/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
  27 flash_info_t flash_info[CONFIG_SYS_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 *) CONFIG_SYS_IMMR;
  42         volatile memctl8xx_t *memctl = &immap->im_memctl;
  43         unsigned long size;
  44 #if CONFIG_NETPHONE_VERSION == 2
  45         unsigned long size1;
  46 #endif
  47         int i;
  48
  49         /* Init: no FLASHes known */
  50         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
  51                 flash_info[i].flash_id = FLASH_UNKNOWN;
  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",
  57                         size, size << 20);
  58         }
  59
  60         /* Remap FLASH according to real size */
  61         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  62         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
  63
  64         /* Re-do sizing to get full correct info */
  65         size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  66
  67         flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  68
  69         /* monitor protection ON by default */
  70         flash_protect(FLAG_PROTECT_SET,
  71                         CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
  72                         &flash_info[0]);
  73
  74         flash_protect ( FLAG_PROTECT_SET,
  75                         CONFIG_ENV_ADDR,
  76                         CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
  77                         &flash_info[0]);
  78
  79 #ifdef CONFIG_ENV_ADDR_REDUND
  80         flash_protect ( FLAG_PROTECT_SET,
  81                         CONFIG_ENV_ADDR_REDUND,
  82                         CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
  83                         &flash_info[0]);
  84 #endif
  85
  86         flash_info[0].size = size;
  87
  88 #if CONFIG_NETPHONE_VERSION == 2
  89         size1 = flash_get_size((vu_long *) FLASH_BASE4_PRELIM, &flash_info[1]);
  90         if (size1 > 0) {
  91                 if (flash_info[1].flash_id == FLASH_UNKNOWN)
  92                         printf("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n", size1, size1 << 20);
  93
  94                 /* Remap FLASH according to real size */
  95                 memctl->memc_or4 = CONFIG_SYS_OR_TIMING_FLASH | (-size1 & 0xFFFF8000);
  96                 memctl->memc_br4 = (CONFIG_SYS_FLASH_BASE4 & BR_BA_MSK) | (memctl->memc_br4 & ~(BR_BA_MSK));
  97
  98                 /* Re-do sizing to get full correct info */
  99                 size1 = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE4, &flash_info[1]);
 100
 101                 flash_get_offsets(CONFIG_SYS_FLASH_BASE4, &flash_info[1]);
 102
 103                 size += size1;
 104         } else
 105                 memctl->memc_br4 &= ~BR_V;
 106 #endif
 107
 108         return (size);
 109 }
 110
 111 /*-----------------------------------------------------------------------
 112  */
 113 static void flash_get_offsets(ulong base, flash_info_t * info)
 114 {
 115         int i;
 116
 117         /* set up sector start address table */
 118         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 119                 for (i = 0; i < info->sector_count; i++) {
 120                         info->start[i] = base + (i * 0x00010000);
 121                 }
 122         } else if (info->flash_id & FLASH_BTYPE) {
 123                 /* set sector offsets for bottom boot block type    */
 124                 info->start[0] = base + 0x00000000;
 125                 info->start[1] = base + 0x00004000;
 126                 info->start[2] = base + 0x00006000;
 127                 info->start[3] = base + 0x00008000;
 128                 for (i = 4; i < info->sector_count; i++) {
 129                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 130                 }
 131         } else {
 132                 /* set sector offsets for top boot block type       */
 133                 i = info->sector_count - 1;
 134                 info->start[i--] = base + info->size - 0x00004000;
 135                 info->start[i--] = base + info->size - 0x00006000;
 136                 info->start[i--] = base + info->size - 0x00008000;
 137                 for (; i >= 0; i--) {
 138                         info->start[i] = base + i * 0x00010000;
 139                 }
 140         }
 141 }
 142
 143 /*-----------------------------------------------------------------------
 144  */
 145 void flash_print_info(flash_info_t * info)
 146 {
 147         int i;
 148
 149         if (info->flash_id == FLASH_UNKNOWN) {
 150                 printf("missing or unknown FLASH type\n");
 151                 return;
 152         }
 153
 154         switch (info->flash_id & FLASH_VENDMASK) {
 155         case FLASH_MAN_AMD:
 156                 printf("AMD ");
 157                 break;
 158         case FLASH_MAN_FUJ:
 159                 printf("FUJITSU ");
 160                 break;
 161         case FLASH_MAN_MX:
 162                 printf("MXIC ");
 163                 break;
 164         default:
 165                 printf("Unknown Vendor ");
 166                 break;
 167         }
 168
 169         switch (info->flash_id & FLASH_TYPEMASK) {
 170         case FLASH_AM040:
 171                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
 172                 break;
 173         case FLASH_AM400B:
 174                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 175                 break;
 176         case FLASH_AM400T:
 177                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
 178                 break;
 179         case FLASH_AM800B:
 180                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 181                 break;
 182         case FLASH_AM800T:
 183                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
 184                 break;
 185         case FLASH_AM160B:
 186                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 187                 break;
 188         case FLASH_AM160T:
 189                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
 190                 break;
 191         case FLASH_AM320B:
 192                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 193                 break;
 194         case FLASH_AM320T:
 195                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
 196                 break;
 197         default:
 198                 printf("Unknown Chip Type\n");
 199                 break;
 200         }
 201
 202         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
 203
 204         printf("  Sector Start Addresses:");
 205         for (i = 0; i < info->sector_count; ++i) {
 206                 if ((i % 5) == 0)
 207                         printf("\n   ");
 208                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
 209         }
 210         printf("\n");
 211 }
 212
 213 /*-----------------------------------------------------------------------
 214  */
 215
 216
 217 /*-----------------------------------------------------------------------
 218  */
 219
 220 /*
 221  * The following code cannot be run from FLASH!
 222  */
 223
 224 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
 225 {
 226         short i;
 227         uchar mid;
 228         uchar pid;
 229         vu_char *caddr = (vu_char *) addr;
 230         ulong base = (ulong) addr;
 231
 232         /* Write auto select command: read Manufacturer ID */
 233         caddr[0x0555] = 0xAA;
 234         caddr[0x02AA] = 0x55;
 235         caddr[0x0555] = 0x90;
 236
 237         mid = caddr[0];
 238         switch (mid) {
 239         case (AMD_MANUFACT & 0xFF):
 240                 info->flash_id = FLASH_MAN_AMD;
 241                 break;
 242         case (FUJ_MANUFACT & 0xFF):
 243                 info->flash_id = FLASH_MAN_FUJ;
 244                 break;
 245         case (MX_MANUFACT & 0xFF):
 246                 info->flash_id = FLASH_MAN_MX;
 247                 break;
 248         case (STM_MANUFACT & 0xFF):
 249                 info->flash_id = FLASH_MAN_STM;
 250                 break;
 251         default:
 252                 info->flash_id = FLASH_UNKNOWN;
 253                 info->sector_count = 0;
 254                 info->size = 0;
 255                 return (0);                             /* no or unknown flash  */
 256         }
 257
 258         pid = caddr[1];                         /* device ID        */
 259         switch (pid) {
 260         case (AMD_ID_LV400T & 0xFF):
 261                 info->flash_id += FLASH_AM400T;
 262                 info->sector_count = 11;
 263                 info->size = 0x00080000;
 264                 break;                                  /* => 512 kB        */
 265
 266         case (AMD_ID_LV400B & 0xFF):
 267                 info->flash_id += FLASH_AM400B;
 268                 info->sector_count = 11;
 269                 info->size = 0x00080000;
 270                 break;                                  /* => 512 kB        */
 271
 272         case (AMD_ID_LV800T & 0xFF):
 273                 info->flash_id += FLASH_AM800T;
 274                 info->sector_count = 19;
 275                 info->size = 0x00100000;
 276                 break;                                  /* => 1 MB      */
 277
 278         case (AMD_ID_LV800B & 0xFF):
 279                 info->flash_id += FLASH_AM800B;
 280                 info->sector_count = 19;
 281                 info->size = 0x00100000;
 282                 break;                                  /* => 1 MB      */
 283
 284         case (AMD_ID_LV160T & 0xFF):
 285                 info->flash_id += FLASH_AM160T;
 286                 info->sector_count = 35;
 287                 info->size = 0x00200000;
 288                 break;                                  /* => 2 MB      */
 289
 290         case (AMD_ID_LV160B & 0xFF):
 291                 info->flash_id += FLASH_AM160B;
 292                 info->sector_count = 35;
 293                 info->size = 0x00200000;
 294                 break;                                  /* => 2 MB      */
 295
 296         case (AMD_ID_LV040B & 0xFF):
 297                 info->flash_id += FLASH_AM040;
 298                 info->sector_count = 8;
 299                 info->size = 0x00080000;
 300                 break;
 301
 302         case (STM_ID_M29W040B & 0xFF):
 303                 info->flash_id += FLASH_AM040;
 304                 info->sector_count = 8;
 305                 info->size = 0x00080000;
 306                 break;
 307
 308 #if 0                                                   /* enable when device IDs are available */
 309         case (AMD_ID_LV320T & 0xFF):
 310                 info->flash_id += FLASH_AM320T;
 311                 info->sector_count = 67;
 312                 info->size = 0x00400000;
 313                 break;                                  /* => 4 MB      */
 314
 315         case (AMD_ID_LV320B & 0xFF):
 316                 info->flash_id += FLASH_AM320B;
 317                 info->sector_count = 67;
 318                 info->size = 0x00400000;
 319                 break;                                  /* => 4 MB      */
 320 #endif
 321         default:
 322                 info->flash_id = FLASH_UNKNOWN;
 323                 return (0);                             /* => no or unknown flash */
 324
 325         }
 326
 327         printf(" ");
 328         /* set up sector start address table */
 329         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 330                 for (i = 0; i < info->sector_count; i++) {
 331                         info->start[i] = base + (i * 0x00010000);
 332                 }
 333         } else if (info->flash_id & FLASH_BTYPE) {
 334                 /* set sector offsets for bottom boot block type    */
 335                 info->start[0] = base + 0x00000000;
 336                 info->start[1] = base + 0x00004000;
 337                 info->start[2] = base + 0x00006000;
 338                 info->start[3] = base + 0x00008000;
 339                 for (i = 4; i < info->sector_count; i++) {
 340                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
 341                 }
 342         } else {
 343                 /* set sector offsets for top boot block type       */
 344                 i = info->sector_count - 1;
 345                 info->start[i--] = base + info->size - 0x00004000;
 346                 info->start[i--] = base + info->size - 0x00006000;
 347                 info->start[i--] = base + info->size - 0x00008000;
 348                 for (; i >= 0; i--) {
 349                         info->start[i] = base + i * 0x00010000;
 350                 }
 351         }
 352
 353         /* check for protected sectors */
 354         for (i = 0; i < info->sector_count; i++) {
 355                 /* read sector protection: D0 = 1 if protected */
 356                 caddr = (volatile unsigned char *)(info->start[i]);
 357                 info->protect[i] = caddr[2] & 1;
 358         }
 359
 360         /*
 361          * Prevent writes to uninitialized FLASH.
 362          */
 363         if (info->flash_id != FLASH_UNKNOWN) {
 364                 caddr = (vu_char *) info->start[0];
 365
 366                 caddr[0x0555] = 0xAA;
 367                 caddr[0x02AA] = 0x55;
 368                 caddr[0x0555] = 0xF0;
 369
 370                 udelay(20000);
 371         }
 372
 373         return (info->size);
 374 }
 375
 376
 377 /*-----------------------------------------------------------------------
 378  */
 379
 380 int flash_erase(flash_info_t * info, int s_first, int s_last)
 381 {
 382         vu_char *addr = (vu_char *) (info->start[0]);
 383         int flag, prot, sect, l_sect;
 384         ulong start, now, last;
 385
 386         if ((s_first < 0) || (s_first > s_last)) {
 387                 if (info->flash_id == FLASH_UNKNOWN) {
 388                         printf("- missing\n");
 389                 } else {
 390                         printf("- no sectors to erase\n");
 391                 }
 392                 return 1;
 393         }
 394
 395         if ((info->flash_id == FLASH_UNKNOWN) ||
 396             (info->flash_id > FLASH_AMD_COMP)) {
 397                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
 398                 return 1;
 399         }
 400
 401         prot = 0;
 402         for (sect = s_first; sect <= s_last; ++sect) {
 403                 if (info->protect[sect]) {
 404                         prot++;
 405                 }
 406         }
 407
 408         if (prot) {
 409                 printf("- Warning: %d protected sectors will not be erased!\n", prot);
 410         } else {
 411                 printf("\n");
 412         }
 413
 414         l_sect = -1;
 415
 416         /* Disable interrupts which might cause a timeout here */
 417         flag = disable_interrupts();
 418
 419         addr[0x0555] = 0xAA;
 420         addr[0x02AA] = 0x55;
 421         addr[0x0555] = 0x80;
 422         addr[0x0555] = 0xAA;
 423         addr[0x02AA] = 0x55;
 424
 425         /* Start erase on unprotected sectors */
 426         for (sect = s_first; sect <= s_last; sect++) {
 427                 if (info->protect[sect] == 0) { /* not protected */
 428                         addr = (vu_char *) (info->start[sect]);
 429                         addr[0] = 0x30;
 430                         l_sect = sect;
 431                 }
 432         }
 433
 434         /* re-enable interrupts if necessary */
 435         if (flag)
 436                 enable_interrupts();
 437
 438         /* wait at least 80us - let's wait 1 ms */
 439         udelay(1000);
 440
 441         /*
 442          * We wait for the last triggered sector
 443          */
 444         if (l_sect < 0)
 445                 goto DONE;
 446
 447         start = get_timer(0);
 448         last = start;
 449         addr = (vu_char *) (info->start[l_sect]);
 450         while ((addr[0] & 0x80) != 0x80) {
 451                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 452                         printf("Timeout\n");
 453                         return 1;
 454                 }
 455                 /* show that we're waiting */
 456                 if ((now - last) > 1000) {      /* every second */
 457                         putc('.');
 458                         last = now;
 459                 }
 460         }
 461
 462 DONE:
 463         /* reset to read mode */
 464         addr = (vu_char *) info->start[0];
 465         addr[0] = 0xF0;                         /* reset bank */
 466
 467         printf(" done\n");
 468         return 0;
 469 }
 470
 471 /*-----------------------------------------------------------------------
 472  * Copy memory to flash, returns:
 473  * 0 - OK
 474  * 1 - write timeout
 475  * 2 - Flash not erased
 476  */
 477
 478 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 479 {
 480         int rc;
 481
 482         while (cnt > 0) {
 483                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
 484                         return (rc);
 485                 }
 486                 --cnt;
 487         }
 488
 489         return (0);
 490 }
 491
 492 /*-----------------------------------------------------------------------
 493  * Write a word to Flash, returns:
 494  * 0 - OK
 495  * 1 - write timeout
 496  * 2 - Flash not erased
 497  */
 498 static int write_byte(flash_info_t * info, ulong dest, uchar data)
 499 {
 500         vu_char *addr = (vu_char *) (info->start[0]);
 501         ulong start;
 502         int flag;
 503
 504         /* Check if Flash is (sufficiently) erased */
 505         if ((*((vu_char *) dest) & data) != data) {
 506                 return (2);
 507         }
 508         /* Disable interrupts which might cause a timeout here */
 509         flag = disable_interrupts();
 510
 511         addr[0x0555] = 0xAA;
 512         addr[0x02AA] = 0x55;
 513         addr[0x0555] = 0xA0;
 514
 515         *((vu_char *) dest) = data;
 516
 517         /* re-enable interrupts if necessary */
 518         if (flag)
 519                 enable_interrupts();
 520
 521         /* data polling for D7 */
 522         start = get_timer(0);
 523         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
 524                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 525                         return (1);
 526                 }
 527         }
 528         return (0);
 529 }