board/xsengine/flash.c

   1 /*
   2  * (C) Copyright 2002
   3  * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
   4  *
   5  * (C) Copyright 2000-2004
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <linux/byteorder/swab.h>
  29
  30 #if defined CFG_JFFS_CUSTOM_PART
  31 #include <jffs2/jffs2.h>
  32 #endif
  33
  34 #define SWAP(x)               __swab32(x)
  35
  36 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
  37
  38 /* Functions */
  39 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  40 static int write_word (flash_info_t *info, ulong dest, ulong data);
  41 static void flash_get_offsets (ulong base, flash_info_t *info);
  42
  43 #if defined CFG_JFFS_CUSTOM_PART
  44
  45 /*
  46  * jffs2_part_info - get information about a JFFS2 partition
  47  *
  48  * @part_num: number of the partition you want to get info about
  49  * @return:   struct part_info* in case of success, 0 if failure
  50  */
  51
  52 static struct part_info part;
  53 static int current_part = -1;
  54
  55 struct part_info* jffs2_part_info(int part_num) {
  56         void *jffs2_priv_saved = part.jffs2_priv;
  57
  58         printf("jffs2_part_info: part_num=%i\n",part_num);
  59
  60         if (current_part == part_num)
  61                 return &part;
  62
  63         /* u-boot partition                                                 */
  64         if(part_num==0){
  65                 memset(&part, 0, sizeof(part));
  66
  67                 part.offset=(char*)0x00000000;
  68                 part.size=256*1024;
  69
  70                 /* Mark the struct as ready */
  71                 current_part = part_num;
  72
  73                 printf("part.offset = 0x%08x\n",(unsigned int)part.offset);
  74                 printf("part.size   = 0x%08x\n",(unsigned int)part.size);
  75         }
  76
  77         /* primary OS+firmware partition                                    */
  78         if(part_num==1){
  79                 memset(&part, 0, sizeof(part));
  80
  81                 part.offset=(char*)0x00040000;
  82                 part.size=1024*1024;
  83
  84                 /* Mark the struct as ready */
  85                 current_part = part_num;
  86
  87                 printf("part.offset = 0x%08x\n",(unsigned int)part.offset);
  88                 printf("part.size   = 0x%08x\n",(unsigned int)part.size);
  89         }
  90
  91         /* secondary OS+firmware partition                                  */
  92         if(part_num==2){
  93                 memset(&part, 0, sizeof(part));
  94
  95                 part.offset=(char*)0x00140000;
  96                 part.size=8*1024*1024;
  97
  98                 /* Mark the struct as ready */
  99                 current_part = part_num;
 100
 101                 printf("part.offset = 0x%08x\n",(unsigned int)part.offset);
 102                 printf("part.size   = 0x%08x\n",(unsigned int)part.size);
 103         }
 104
 105         if (current_part == part_num) {
 106                 part.usr_priv = &current_part;
 107                 part.jffs2_priv = jffs2_priv_saved;
 108                 return &part;
 109         }
 110
 111         printf("jffs2_part_info: end of partition table\n");
 112         return 0;
 113 }
 114 #endif
 115
 116
 117 /*-----------------------------------------------------------------------
 118  */
 119 unsigned long flash_init (void)
 120 {
 121         int i;
 122         ulong size = 0;
 123
 124         for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
 125                 switch (i) {
 126                 case 0:
 127                         flash_get_size ((long *) PHYS_FLASH_1, &flash_info[i]);
 128                         flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
 129                         break;
 130                 case 1:
 131                         flash_get_size ((long *) PHYS_FLASH_2, &flash_info[i]);
 132                         flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
 133                         break;
 134                 default:
 135                         panic ("configured too many flash banks!\n");
 136                         break;
 137                 }
 138                 size += flash_info[i].size;
 139         }
 140
 141         /* Protect monitor and environment sectors */
 142         flash_protect ( FLAG_PROTECT_SET,CFG_FLASH_BASE,CFG_FLASH_BASE + monitor_flash_len - 1,&flash_info[0] );
 143         flash_protect ( FLAG_PROTECT_SET,CFG_ENV_ADDR,CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
 144
 145         return size;
 146 }
 147
 148 /*-----------------------------------------------------------------------
 149  */
 150 static void flash_get_offsets (ulong base, flash_info_t *info)
 151 {
 152         int i;
 153
 154         if (info->flash_id == FLASH_UNKNOWN) return;
 155
 156         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
 157                 for (i = 0; i < info->sector_count; i++) {
 158                         info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
 159                         info->protect[i] = 0;
 160                 }
 161         }
 162 }
 163
 164 /*-----------------------------------------------------------------------
 165  */
 166 void flash_print_info  (flash_info_t *info)
 167 {
 168         int i;
 169
 170         if (info->flash_id == FLASH_UNKNOWN) {
 171                 printf ("missing or unknown FLASH type\n");
 172                 return;
 173         }
 174
 175         switch (info->flash_id & FLASH_VENDMASK) {
 176         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 177         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 178         default:                printf ("Unknown Vendor ");     break;
 179         }
 180
 181         switch (info->flash_id & FLASH_TYPEMASK) {
 182         case FLASH_AMLV128U:    printf ("AM29LV128ML (128Mbit, uniform sector size)\n");
 183                                 break;
 184         case FLASH_AMLV320U:    printf ("AM29LV320ML (32Mbit, uniform sector size)\n");
 185                                 break;
 186         case FLASH_AMLV640U:    printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
 187                                 break;
 188         case FLASH_AMLV320B:    printf ("AM29LV320MB (32Mbit, bottom boot sect)\n");
 189                                 break;
 190         default:                printf ("Unknown Chip Type\n");
 191                                 break;
 192         }
 193
 194         printf ("  Size: %ld MB in %d Sectors\n",
 195                 info->size >> 20, info->sector_count);
 196
 197         printf ("  Sector Start Addresses:");
 198         for (i=0; i<info->sector_count; ++i) {
 199                 if ((i % 5) == 0)
 200                         printf ("\n   ");
 201                 printf (" %08lX%s",
 202                         info->start[i],
 203                         info->protect[i] ? " (RO)" : "     "
 204                 );
 205         }
 206         printf ("\n");
 207         return;
 208 }
 209
 210 /*
 211  * The following code cannot be run from FLASH!
 212  */
 213 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 214 {
 215         short i;
 216         ulong value;
 217         ulong base = (ulong)addr;
 218
 219         /* Write auto select command: read Manufacturer ID */
 220         addr[0x0555] = 0x00AA00AA;
 221         addr[0x02AA] = 0x00550055;
 222         addr[0x0555] = 0x00900090;
 223
 224         value = addr[0];
 225
 226         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 227
 228         switch (value) {
 229         case AMD_MANUFACT:
 230                 debug ("Manufacturer: AMD\n");
 231                 info->flash_id = FLASH_MAN_AMD;
 232                 break;
 233         case FUJ_MANUFACT:
 234                 debug ("Manufacturer: FUJITSU\n");
 235                 info->flash_id = FLASH_MAN_FUJ;
 236                 break;
 237         default:
 238                 debug ("Manufacturer: *** unknown ***\n");
 239                 info->flash_id = FLASH_UNKNOWN;
 240                 info->sector_count = 0;
 241                 info->size = 0;
 242                 return (0);                     /* no or unknown flash  */
 243         }
 244
 245         value = addr[1];                        /* device ID            */
 246
 247         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 248
 249         switch (value) {
 250
 251         case AMD_ID_MIRROR:
 252                 debug ("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
 253                         addr[14], addr[15]);
 254                 switch(addr[14]) {
 255                 case AMD_ID_LV128U_2:
 256                         if (addr[15] != AMD_ID_LV128U_3) {
 257                                 debug ("Chip: AMLV128U -> unknown\n");
 258                                 info->flash_id = FLASH_UNKNOWN;
 259                         } else {
 260                                 debug ("Chip: AMLV128U\n");
 261                                 info->flash_id += FLASH_AMLV128U;
 262                                 info->sector_count = 256;
 263                                 info->size = 0x02000000;
 264                         }
 265                         break;                          /* => 32 MB     */
 266                 case AMD_ID_LV640U_2:
 267                         if (addr[15] != AMD_ID_LV640U_3) {
 268                                 debug ("Chip: AMLV640U -> unknown\n");
 269                                 info->flash_id = FLASH_UNKNOWN;
 270                         } else {
 271                                 debug ("Chip: AMLV640U\n");
 272                                 info->flash_id += FLASH_AMLV640U;
 273                                 info->sector_count = 128;
 274                                 info->size = 0x01000000;
 275                         }
 276                         break;                          /* => 16 MB     */
 277                 case AMD_ID_LV320B_2:
 278                         if (addr[15] != AMD_ID_LV320B_3) {
 279                                 debug ("Chip: AMLV320B -> unknown\n");
 280                                 info->flash_id = FLASH_UNKNOWN;
 281                         } else {
 282                                 debug ("Chip: AMLV320B\n");
 283                                 info->flash_id += FLASH_AMLV320B;
 284                                 info->sector_count = 71;
 285                                 info->size = 0x00800000;
 286                         }
 287                         break;                          /* =>  8 MB     */
 288                 default:
 289                         debug ("Chip: *** unknown ***\n");
 290                         info->flash_id = FLASH_UNKNOWN;
 291                         break;
 292                 }
 293                 break;
 294
 295         default:
 296                 info->flash_id = FLASH_UNKNOWN;
 297                 return (0);                     /* => no or unknown flash */
 298         }
 299
 300         /* set up sector start address table */
 301         switch (value) {
 302         case AMD_ID_MIRROR:
 303                 switch (info->flash_id & FLASH_TYPEMASK) {
 304                 /* only known types here - no default */
 305                 case FLASH_AMLV128U:
 306                 case FLASH_AMLV640U:
 307                 case FLASH_AMLV320U:
 308                         for (i = 0; i < info->sector_count; i++) {
 309                                 info->start[i] = base;
 310                                 base += 0x20000;
 311                         }
 312                         break;
 313                 case FLASH_AMLV320B:
 314                         for (i = 0; i < info->sector_count; i++) {
 315                                 info->start[i] = base;
 316                                 /*
 317                                  * The first 8 sectors are 8 kB,
 318                                  * all the other ones  are 64 kB
 319                                  */
 320                                 base += (i < 8)
 321                                         ?  2 * ( 8 << 10)
 322                                         :  2 * (64 << 10);
 323                         }
 324                         break;
 325                 }
 326                 break;
 327
 328         default:
 329                 return (0);
 330                 break;
 331         }
 332
 333 #if 0
 334         /* check for protected sectors */
 335         for (i = 0; i < info->sector_count; i++) {
 336                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 337                 /* D0 = 1 if protected */
 338                 addr = (volatile unsigned long *)(info->start[i]);
 339                 info->protect[i] = addr[2] & 1;
 340         }
 341 #endif
 342
 343         /*
 344          * Prevent writes to uninitialized FLASH.
 345          */
 346         if (info->flash_id != FLASH_UNKNOWN) {
 347                 addr = (volatile unsigned long *)info->start[0];
 348
 349                 *addr = 0x00F000F0;     /* reset bank */
 350         }
 351
 352         return (info->size);
 353 }
 354
 355
 356 /*-----------------------------------------------------------------------
 357  */
 358
 359 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 360 {
 361         vu_long *addr = (vu_long*)(info->start[0]);
 362         int flag, prot, sect, l_sect;
 363         ulong start, now, last;
 364
 365         debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
 366
 367         if ((s_first < 0) || (s_first > s_last)) {
 368                 if (info->flash_id == FLASH_UNKNOWN) {
 369                         printf ("- missing\n");
 370                 } else {
 371                         printf ("- no sectors to erase\n");
 372                 }
 373                 return 1;
 374         }
 375
 376         if ((info->flash_id == FLASH_UNKNOWN) ||
 377             (info->flash_id > FLASH_AMD_COMP)) {
 378                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 379                         info->flash_id);
 380                 return 1;
 381         }
 382
 383         prot = 0;
 384         for (sect=s_first; sect<=s_last; ++sect) {
 385                 if (info->protect[sect]) {
 386                         prot++;
 387                 }
 388         }
 389
 390         if (prot) {
 391                 printf ("- Warning: %d protected sectors will not be erased!\n",
 392                         prot);
 393         } else {
 394                 printf ("\n");
 395         }
 396
 397         l_sect = -1;
 398
 399         /* Disable interrupts which might cause a timeout here */
 400         flag = disable_interrupts();
 401
 402         addr[0x0555] = 0x00AA00AA;
 403         addr[0x02AA] = 0x00550055;
 404         addr[0x0555] = 0x00800080;
 405         addr[0x0555] = 0x00AA00AA;
 406         addr[0x02AA] = 0x00550055;
 407
 408         /* Start erase on unprotected sectors */
 409         for (sect = s_first; sect<=s_last; sect++) {
 410                 if (info->protect[sect] == 0) { /* not protected */
 411                         addr = (vu_long*)(info->start[sect]);
 412                         addr[0] = 0x00300030;
 413                         l_sect = sect;
 414                 }
 415         }
 416
 417         /* re-enable interrupts if necessary */
 418         if (flag)
 419                 enable_interrupts();
 420
 421         /* wait at least 80us - let's wait 1 ms */
 422         udelay (1000);
 423
 424         /*
 425          * We wait for the last triggered sector
 426          */
 427         if (l_sect < 0)
 428                 goto DONE;
 429
 430         start = get_timer (0);
 431         last  = start;
 432         addr = (vu_long*)(info->start[l_sect]);
 433         while ((addr[0] & 0x00800080) != 0x00800080) {
 434                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 435                         printf ("Timeout\n");
 436                         return 1;
 437                 }
 438                 /* show that we're waiting */
 439                 if ((now - last) > 100000) {    /* every second */
 440                         putc ('.');
 441                         last = now;
 442                 }
 443         }
 444
 445 DONE:
 446         /* reset to read mode */
 447         addr = (volatile unsigned long *)info->start[0];
 448         addr[0] = 0x00F000F0;   /* reset bank */
 449
 450         printf (" done\n");
 451         return 0;
 452 }
 453
 454 /*-----------------------------------------------------------------------
 455  * Copy memory to flash, returns:
 456  * 0 - OK
 457  * 1 - write timeout
 458  * 2 - Flash not erased
 459  */
 460
 461 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 462 {
 463         ulong cp, wp, data;
 464         int i, l, rc;
 465
 466         wp = (addr & ~3);       /* get lower word aligned address */
 467
 468         /*
 469          * handle unaligned start bytes
 470          */
 471         if ((l = addr - wp) != 0) {
 472                 data = 0;
 473                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 474                         data = (data << 8) | (*(uchar *)cp);
 475                 }
 476                 for (; i<4 && cnt>0; ++i) {
 477                         data = (data << 8) | *src++;
 478                         --cnt;
 479                         ++cp;
 480                 }
 481                 for (; cnt==0 && i<4; ++i, ++cp) {
 482                         data = (data << 8) | (*(uchar *)cp);
 483                 }
 484
 485                 if ((rc = write_word(info, wp, SWAP(data))) != 0) {
 486                         return (rc);
 487                 }
 488                 wp += 4;
 489         }
 490
 491         /*
 492          * handle word aligned part
 493          */
 494         while (cnt >= 4) {
 495                 data = 0;
 496                 for (i=0; i<4; ++i) {
 497                         data = (data << 8) | *src++;
 498                 }
 499                 if ((rc = write_word(info, wp, SWAP(data))) != 0) {
 500                         return (rc);
 501                 }
 502                 wp  += 4;
 503                 cnt -= 4;
 504         }
 505
 506         if (cnt == 0) {
 507                 return (0);
 508         }
 509
 510         /*
 511          * handle unaligned tail bytes
 512          */
 513         data = 0;
 514         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 515                 data = (data << 8) | *src++;
 516                 --cnt;
 517         }
 518         for (; i<4; ++i, ++cp) {
 519                 data = (data << 8) | (*(uchar *)cp);
 520         }
 521
 522         return (write_word(info, wp, SWAP(data)));
 523 }
 524
 525 /*-----------------------------------------------------------------------
 526  * Write a word to Flash, returns:
 527  * 0 - OK
 528  * 1 - write timeout
 529  * 2 - Flash not erased
 530  */
 531 static int write_word (flash_info_t *info, ulong dest, ulong data)
 532 {
 533         vu_long *addr = (vu_long*)(info->start[0]);
 534         ulong start;
 535         ulong rev;
 536         int flag;
 537         int i;
 538
 539         /* Check if Flash is (sufficiently) erased */
 540         if ((*((vu_long *)dest) & data) != data) {
 541                 return (2);
 542         }
 543
 544         /* Disable interrupts which might cause a timeout here */
 545         flag = disable_interrupts();
 546
 547         addr[0x0555] = 0x00AA00AA;
 548         addr[0x02AA] = 0x00550055;
 549         addr[0x0555] = 0x00A000A0;
 550
 551         *((vu_long *)dest) = data;
 552
 553         /* re-enable interrupts if necessary */
 554         if (flag)
 555                 enable_interrupts();
 556
 557         /* data polling for D7 */
 558         start = get_timer (0);
 559         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 560                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 561                         return (1);
 562                 }
 563         }
 564         return (0);
 565 }