board/RRvision/flash.c

   1 /*
   2  * (C) Copyright 2000-2002
   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 #define DEBUG
  25
  26 #include <common.h>
  27 #include <mpc8xx.h>
  28
  29 #ifndef CFG_ENV_ADDR
  30 #define CFG_ENV_ADDR    (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  31 #endif
  32
  33 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  34
  35 /*-----------------------------------------------------------------------
  36  * Functions
  37  */
  38 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  39 static int write_word (flash_info_t *info, ulong dest, ulong data);
  40
  41 /*-----------------------------------------------------------------------
  42  */
  43
  44 unsigned long flash_init (void)
  45 {
  46         volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
  47         volatile memctl8xx_t *memctl = &immap->im_memctl;
  48         unsigned long size;
  49         int i;
  50
  51         /* Init: no FLASHes known */
  52         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  53                 flash_info[i].flash_id = FLASH_UNKNOWN;
  54         }
  55
  56         /* Static FLASH Bank configuration here - FIXME XXX */
  57
  58         size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  59
  60         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  61                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  62                         size, size<<20);
  63         }
  64
  65         /* Remap FLASH according to real size */
  66         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & OR_AM_MSK);
  67         memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
  68
  69         /* Re-do sizing to get full correct info */
  70         size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
  71
  72 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
  73         /* monitor protection ON by default */
  74         flash_protect(FLAG_PROTECT_SET,
  75                       CFG_MONITOR_BASE,
  76                       CFG_MONITOR_BASE+monitor_flash_len-1,
  77                       &flash_info[0]);
  78 #endif
  79
  80 #ifdef  CFG_ENV_IS_IN_FLASH
  81         /* ENV protection ON by default */
  82         flash_protect(FLAG_PROTECT_SET,
  83                       CFG_ENV_ADDR,
  84                       CFG_ENV_ADDR+CFG_ENV_SIZE-1,
  85                       &flash_info[0]);
  86 #endif
  87
  88         flash_info[0].size = size;
  89
  90         return (size);
  91 }
  92
  93 /*-----------------------------------------------------------------------
  94  */
  95 void flash_print_info  (flash_info_t *info)
  96 {
  97         int i;
  98
  99         if (info->flash_id == FLASH_UNKNOWN) {
 100                 puts ("missing or unknown FLASH type\n");
 101                 return;
 102         }
 103
 104         switch (info->flash_id & FLASH_VENDMASK) {
 105         case FLASH_MAN_AMD:     puts ("AMD ");                  break;
 106         case FLASH_MAN_FUJ:     puts ("FUJITSU ");              break;
 107         default:                puts ("Unknown Vendor ");       break;
 108         }
 109
 110         switch (info->flash_id & FLASH_TYPEMASK) {
 111         case FLASH_AM400B:      puts ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 112                                 break;
 113         case FLASH_AM400T:      puts ("AM29LV400T (4 Mbit, top boot sector)\n");
 114                                 break;
 115         case FLASH_AM800B:      puts ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 116                                 break;
 117         case FLASH_AM800T:      puts ("AM29LV800T (8 Mbit, top boot sector)\n");
 118                                 break;
 119         case FLASH_AM160B:      puts ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 120                                 break;
 121         case FLASH_AM160T:      puts ("AM29LV160T (16 Mbit, top boot sector)\n");
 122                                 break;
 123         case FLASH_AM320B:      puts ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 124                                 break;
 125         case FLASH_AM320T:      puts ("AM29LV320T (32 Mbit, top boot sector)\n");
 126                                 break;
 127         default:                puts ("Unknown Chip Type\n");
 128                                 break;
 129         }
 130
 131         printf ("  Size: %ld MB in %d Sectors\n",
 132                 info->size >> 20, info->sector_count);
 133
 134         puts ("  Sector Start Addresses:");
 135         for (i=0; i<info->sector_count; ++i) {
 136                 if ((i % 5) == 0)
 137                         puts ("\n   ");
 138                 printf (" %08lX%s",
 139                         info->start[i],
 140                         info->protect[i] ? " (RO)" : "     "
 141                 );
 142         }
 143         puts ("\n");
 144         return;
 145 }
 146
 147 /*-----------------------------------------------------------------------
 148  */
 149
 150
 151 /*-----------------------------------------------------------------------
 152  */
 153
 154 /*
 155  * The following code cannot be run from FLASH!
 156  */
 157
 158 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 159 {
 160         short i;
 161         ulong value;
 162         ulong base = (ulong)addr;
 163
 164         /* Write auto select command: read Manufacturer ID */
 165         addr[0x0555] = 0x00AA00AA;
 166         addr[0x02AA] = 0x00550055;
 167         addr[0x0555] = 0x00900090;
 168
 169         value = addr[0];
 170
 171         switch (value) {
 172         case AMD_MANUFACT:
 173                 info->flash_id = FLASH_MAN_AMD;
 174                 break;
 175         case FUJ_MANUFACT:
 176                 info->flash_id = FLASH_MAN_FUJ;
 177                 break;
 178         default:
 179                 info->flash_id = FLASH_UNKNOWN;
 180                 info->sector_count = 0;
 181                 info->size = 0;
 182                 return (0);                     /* no or unknown flash  */
 183         }
 184
 185         value = addr[1];                        /* device ID            */
 186
 187         switch (value) {
 188         case AMD_ID_LV400T:
 189                 info->flash_id += FLASH_AM400T;
 190                 info->sector_count = 11;
 191                 info->size = 0x00100000;
 192                 break;                          /* => 1 MB              */
 193
 194         case AMD_ID_LV400B:
 195                 info->flash_id += FLASH_AM400B;
 196                 info->sector_count = 11;
 197                 info->size = 0x00100000;
 198                 break;                          /* => 1 MB              */
 199
 200         case AMD_ID_LV800T:
 201                 info->flash_id += FLASH_AM800T;
 202                 info->sector_count = 19;
 203                 info->size = 0x00200000;
 204                 break;                          /* => 2 MB              */
 205
 206         case AMD_ID_LV800B:
 207                 info->flash_id += FLASH_AM800B;
 208                 info->sector_count = 19;
 209                 info->size = 0x00200000;
 210                 break;                          /* => 2 MB              */
 211
 212         case AMD_ID_LV160T:
 213                 info->flash_id += FLASH_AM160T;
 214                 info->sector_count = 35;
 215                 info->size = 0x00400000;
 216                 break;                          /* => 4 MB              */
 217
 218         case AMD_ID_LV160B:
 219                 info->flash_id += FLASH_AM160B;
 220                 info->sector_count = 35;
 221                 info->size = 0x00400000;
 222                 break;                          /* => 4 MB              */
 223         case AMD_ID_LV320T:
 224                 info->flash_id += FLASH_AM320T;
 225                 info->sector_count = 71;
 226                 info->size = 0x00800000;
 227                 break;                          /* => 8 MB              */
 228
 229         case AMD_ID_LV320B:
 230                 info->flash_id += FLASH_AM320B;
 231                 info->sector_count = 71;
 232                 info->size = 0x00800000;
 233                 break;                          /* => 8 MB              */
 234         default:
 235                 info->flash_id = FLASH_UNKNOWN;
 236                 return (0);                     /* => no or unknown flash */
 237         }
 238
 239         /* set up sector start address table */
 240         switch (value) {
 241         case AMD_ID_LV400B:
 242         case AMD_ID_LV800B:
 243         case AMD_ID_LV160B:
 244                 /* set sector offsets for bottom boot block type        */
 245                 info->start[0] = base + 0x00000000;
 246                 info->start[1] = base + 0x00008000;
 247                 info->start[2] = base + 0x0000C000;
 248                 info->start[3] = base + 0x00010000;
 249                 for (i = 4; i < info->sector_count; i++) {
 250                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 251                 }
 252                 break;
 253         case AMD_ID_LV400T:
 254         case AMD_ID_LV800T:
 255         case AMD_ID_LV160T:
 256                 /* set sector offsets for top boot block type           */
 257                 i = info->sector_count - 1;
 258                 info->start[i--] = base + info->size - 0x00008000;
 259                 info->start[i--] = base + info->size - 0x0000C000;
 260                 info->start[i--] = base + info->size - 0x00010000;
 261                 for (; i >= 0; i--) {
 262                         info->start[i] = base + i * 0x00020000;
 263                 }
 264                 break;
 265         case AMD_ID_LV320B:
 266                 for (i = 0; i < info->sector_count; i++) {
 267                         info->start[i] = base;
 268                         /*
 269                          * The first 8 sectors are 8 kB,
 270                          * all the other ones  are 64 kB
 271                          */
 272                         base += (i < 8)
 273                                 ?  2 * ( 8 << 10)
 274                                 :  2 * (64 << 10);
 275                 }
 276                 break;
 277         case AMD_ID_LV320T:
 278                 for (i = 0; i < info->sector_count; i++) {
 279                         info->start[i] = base;
 280                         /*
 281                          * The last 8 sectors are 8 kB,
 282                          * all the other ones  are 64 kB
 283                          */
 284                         base += (i < (info->sector_count - 8))
 285                                 ?  2 * (64 << 10)
 286                                 :  2 * ( 8 << 10);
 287                 }
 288                 break;
 289         default:
 290                 return (0);
 291                 break;
 292         }
 293
 294         /* check for protected sectors */
 295         for (i = 0; i < info->sector_count; i++) {
 296                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 297                 /* D0 = 1 if protected */
 298                 addr = (volatile unsigned long *)(info->start[i]);
 299                 info->protect[i] = addr[2] & 1;
 300         }
 301
 302         /*
 303          * Prevent writes to uninitialized FLASH.
 304          */
 305         if (info->flash_id != FLASH_UNKNOWN) {
 306                 addr = (volatile unsigned long *)info->start[0];
 307
 308                 *addr = 0x00F000F0;     /* reset bank */
 309         }
 310
 311         return (info->size);
 312 }
 313
 314
 315 /*-----------------------------------------------------------------------
 316  */
 317
 318 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 319 {
 320         vu_long *addr = (vu_long*)(info->start[0]);
 321         int flag, prot, sect, l_sect;
 322         ulong start, now, last;
 323
 324         if ((s_first < 0) || (s_first > s_last)) {
 325                 if (info->flash_id == FLASH_UNKNOWN) {
 326                         puts ("- missing\n");
 327                 } else {
 328                         puts ("- no sectors to erase\n");
 329                 }
 330                 return 1;
 331         }
 332
 333         if ((info->flash_id == FLASH_UNKNOWN) ||
 334             (info->flash_id > FLASH_AMD_COMP)) {
 335                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 336                         info->flash_id);
 337                 return 1;
 338         }
 339
 340         prot = 0;
 341         for (sect=s_first; sect<=s_last; ++sect) {
 342                 if (info->protect[sect]) {
 343                         prot++;
 344                 }
 345         }
 346
 347         if (prot) {
 348                 printf ("- Warning: %d protected sectors will not be erased!\n",
 349                         prot);
 350         } else {
 351                 puts ("\n");
 352         }
 353
 354         l_sect = -1;
 355
 356         /* Disable interrupts which might cause a timeout here */
 357         flag = disable_interrupts();
 358
 359         addr[0x0555] = 0x00AA00AA;
 360         addr[0x02AA] = 0x00550055;
 361         addr[0x0555] = 0x00800080;
 362         addr[0x0555] = 0x00AA00AA;
 363         addr[0x02AA] = 0x00550055;
 364
 365         /* Start erase on unprotected sectors */
 366         for (sect = s_first; sect<=s_last; sect++) {
 367                 if (info->protect[sect] == 0) { /* not protected */
 368                         addr = (vu_long*)(info->start[sect]);
 369                         addr[0] = 0x00300030;
 370                         l_sect = sect;
 371                 }
 372         }
 373
 374         /* re-enable interrupts if necessary */
 375         if (flag)
 376                 enable_interrupts();
 377
 378         /* wait at least 80us - let's wait 1 ms */
 379         udelay (1000);
 380
 381         /*
 382          * We wait for the last triggered sector
 383          */
 384         if (l_sect < 0)
 385                 goto DONE;
 386
 387         start = get_timer (0);
 388         last  = start;
 389         addr = (vu_long*)(info->start[l_sect]);
 390         while ((addr[0] & 0x00800080) != 0x00800080) {
 391                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 392                         puts ("Timeout\n");
 393                         return 1;
 394                 }
 395                 /* show that we're waiting */
 396                 if ((now - last) > 1000) {      /* every second */
 397                         putc ('.');
 398                         last = now;
 399                 }
 400         }
 401
 402 DONE:
 403         /* reset to read mode */
 404         addr = (volatile unsigned long *)info->start[0];
 405         addr[0] = 0x00F000F0;   /* reset bank */
 406
 407         puts (" done\n");
 408         return 0;
 409 }
 410
 411 /*-----------------------------------------------------------------------
 412  * Copy memory to flash, returns:
 413  * 0 - OK
 414  * 1 - write timeout
 415  * 2 - Flash not erased
 416  */
 417
 418 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 419 {
 420         ulong cp, wp, data;
 421         int i, l, rc;
 422
 423         wp = (addr & ~3);       /* get lower word aligned address */
 424
 425         /*
 426          * handle unaligned start bytes
 427          */
 428         if ((l = addr - wp) != 0) {
 429                 data = 0;
 430                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 431                         data = (data << 8) | (*(uchar *)cp);
 432                 }
 433                 for (; i<4 && cnt>0; ++i) {
 434                         data = (data << 8) | *src++;
 435                         --cnt;
 436                         ++cp;
 437                 }
 438                 for (; cnt==0 && i<4; ++i, ++cp) {
 439                         data = (data << 8) | (*(uchar *)cp);
 440                 }
 441
 442                 if ((rc = write_word(info, wp, data)) != 0) {
 443                         return (rc);
 444                 }
 445                 wp += 4;
 446         }
 447
 448         /*
 449          * handle word aligned part
 450          */
 451         while (cnt >= 4) {
 452                 data = 0;
 453                 for (i=0; i<4; ++i) {
 454                         data = (data << 8) | *src++;
 455                 }
 456                 if ((rc = write_word(info, wp, data)) != 0) {
 457                         return (rc);
 458                 }
 459                 wp  += 4;
 460                 cnt -= 4;
 461         }
 462
 463         if (cnt == 0) {
 464                 return (0);
 465         }
 466
 467         /*
 468          * handle unaligned tail bytes
 469          */
 470         data = 0;
 471         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 472                 data = (data << 8) | *src++;
 473                 --cnt;
 474         }
 475         for (; i<4; ++i, ++cp) {
 476                 data = (data << 8) | (*(uchar *)cp);
 477         }
 478
 479         return (write_word(info, wp, data));
 480 }
 481
 482 /*-----------------------------------------------------------------------
 483  * Write a word to Flash, returns:
 484  * 0 - OK
 485  * 1 - write timeout
 486  * 2 - Flash not erased
 487  */
 488 static int write_word (flash_info_t *info, ulong dest, ulong data)
 489 {
 490         vu_long *addr = (vu_long*)(info->start[0]);
 491         ulong start;
 492         int flag;
 493
 494         /* Check if Flash is (sufficiently) erased */
 495         if ((*((vu_long *)dest) & data) != data) {
 496                 return (2);
 497         }
 498         /* Disable interrupts which might cause a timeout here */
 499         flag = disable_interrupts();
 500
 501         addr[0x0555] = 0x00AA00AA;
 502         addr[0x02AA] = 0x00550055;
 503         addr[0x0555] = 0x00A000A0;
 504
 505         *((vu_long *)dest) = data;
 506
 507         /* re-enable interrupts if necessary */
 508         if (flag)
 509                 enable_interrupts();
 510
 511         /* data polling for D7 */
 512         start = get_timer (0);
 513         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 514                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 515                         return (1);
 516                 }
 517         }
 518         return (0);
 519 }
 520
 521 /*-----------------------------------------------------------------------
 522  */