board/trab/flash.c

   1 /*
   2  * (C) Copyright 2002
   3  * Gary Jennejohn, DENX Software Engineering, <gj@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 <environment.h>
  28
  29 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  30
  31 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
  32
  33
  34 #define CMD_READ_ARRAY          0x00F000F0
  35 #define CMD_UNLOCK1             0x00AA00AA
  36 #define CMD_UNLOCK2             0x00550055
  37 #define CMD_ERASE_SETUP         0x00800080
  38 #define CMD_ERASE_CONFIRM       0x00300030
  39 #define CMD_PROGRAM             0x00A000A0
  40 #define CMD_UNLOCK_BYPASS       0x00200020
  41 #define CMD_READ_MANF_ID        0x00900090
  42
  43 #define MEM_FLASH_ADDR1         (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
  44 #define MEM_FLASH_ADDR2         (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))
  45
  46 #define BIT_ERASE_DONE          0x00800080
  47 #define BIT_RDY_MASK            0x00800080
  48 #define BIT_PROGRAM_ERROR       0x00200020
  49 #define BIT_TIMEOUT             0x80000000      /* our flag */
  50
  51 #define READY 1
  52 #define ERR   2
  53 #define TMO   4
  54
  55 /*-----------------------------------------------------------------------
  56  */
  57
  58 ulong flash_init (void)
  59 {
  60         int i, j;
  61         ulong size = 0;
  62
  63         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  64                 ulong flashbase = 0;
  65                 flash_info_t *info = &flash_info[i];
  66
  67                 /* Init: no FLASHes known */
  68                 info->flash_id = FLASH_UNKNOWN;
  69
  70                 size += flash_get_size (CFG_FLASH_BASE, info);
  71
  72                 if (i == 0)
  73                         flashbase = CFG_FLASH_BASE;
  74                 else
  75                         panic ("configured too many flash banks!\n");
  76                 for (j = 0; j < info->sector_count; j++) {
  77
  78                         info->protect[j] = 0;
  79                         info->start[j] = flashbase;
  80
  81                         switch (info->flash_id & FLASH_TYPEMASK) {
  82                         case (FLASH_AM320B & FLASH_TYPEMASK):
  83                                 /* Boot sector type: 8 x 8 + N x 128 kB */
  84                                 flashbase += (j < 8) ? 0x4000 : 0x20000;
  85                                 break;
  86                         case (FLASH_AM640U & FLASH_TYPEMASK):
  87                                 /* Uniform sector type: 128 kB */
  88                                 flashbase += 0x20000;
  89                                 break;
  90                         default:
  91                                 printf ("## Bad flash chip type 0x%04lX\n",
  92                                         info->flash_id & FLASH_TYPEMASK);
  93                         }
  94                 }
  95         }
  96
  97         /*
  98          * Protect monitor and environment sectors
  99          */
 100         flash_protect ( FLAG_PROTECT_SET,
 101                         CFG_FLASH_BASE,
 102                         CFG_FLASH_BASE + monitor_flash_len - 1,
 103                         &flash_info[0]);
 104
 105         flash_protect ( FLAG_PROTECT_SET,
 106                         CFG_ENV_ADDR,
 107                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
 108
 109 #ifdef CFG_ENV_ADDR_REDUND
 110         flash_protect ( FLAG_PROTECT_SET,
 111                         CFG_ENV_ADDR_REDUND,
 112                         CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
 113                         &flash_info[0]);
 114 #endif
 115
 116         return size;
 117 }
 118
 119 /*-----------------------------------------------------------------------
 120  */
 121 void flash_print_info (flash_info_t * info)
 122 {
 123         int i;
 124
 125         switch (info->flash_id & FLASH_VENDMASK) {
 126         case (FLASH_MAN_AMD & FLASH_VENDMASK):
 127                         printf ("AMD ");                break;
 128         case (FLASH_MAN_FUJ & FLASH_VENDMASK):
 129                         printf ("FUJITSU ");            break;
 130         default:        printf ("Unknown Vendor ");     break;
 131         }
 132
 133         switch (info->flash_id & FLASH_TYPEMASK) {
 134         case (FLASH_AM320B & FLASH_TYPEMASK):
 135                 printf ("2x Am29LV320DB (32Mbit)\n");
 136                 break;
 137         case (FLASH_AM640U & FLASH_TYPEMASK):
 138                 printf ("2x Am29LV640D (64Mbit)\n");
 139                 break;
 140         default:
 141                 printf ("Unknown Chip Type\n");
 142                 goto Done;
 143                 break;
 144         }
 145
 146         printf ("  Size: %ld MB in %d Sectors\n",
 147                         info->size >> 20, info->sector_count);
 148
 149         printf ("  Sector Start Addresses:");
 150         for (i = 0; i < info->sector_count; i++) {
 151                 if ((i % 5) == 0) {
 152                         printf ("\n   ");
 153                 }
 154                 printf (" %08lX%s",
 155                         info->start[i],
 156                         info->protect[i] ? " (RO)" : "     ");
 157         }
 158         printf ("\n");
 159
 160   Done:
 161 }
 162
 163 /*-----------------------------------------------------------------------
 164  */
 165
 166 int flash_erase (flash_info_t * info, int s_first, int s_last)
 167 {
 168         ulong result;
 169
 170 #if 0
 171         int cflag;
 172 #endif
 173         int iflag, prot, sect;
 174         int rc = ERR_OK;
 175         int chip1, chip2;
 176
 177         debug ("flash_erase: s_first %d  s_last %d\n", s_first, s_last);
 178
 179         /* first look for protection bits */
 180
 181         if (info->flash_id == FLASH_UNKNOWN)
 182                 return ERR_UNKNOWN_FLASH_TYPE;
 183
 184         if ((s_first < 0) || (s_first > s_last)) {
 185                 return ERR_INVAL;
 186         }
 187
 188         switch (info->flash_id & FLASH_VENDMASK) {
 189         case (FLASH_MAN_AMD & FLASH_VENDMASK):  break;  /* OK */
 190         case (FLASH_MAN_FUJ & FLASH_VENDMASK):  break;  /* OK */
 191         default:
 192                 debug ("## flash_erase: unknown manufacturer\n");
 193                 return (ERR_UNKNOWN_FLASH_VENDOR);
 194         }
 195
 196         prot = 0;
 197         for (sect = s_first; sect <= s_last; ++sect) {
 198                 if (info->protect[sect]) {
 199                         prot++;
 200                 }
 201         }
 202
 203         if (prot) {
 204                 printf ("- Warning: %d protected sectors will not be erased!\n",
 205                         prot);
 206         } else {
 207                 printf ("\n");
 208         }
 209
 210         /*
 211          * Disable interrupts which might cause a timeout
 212          * here. Remember that our exception vectors are
 213          * at address 0 in the flash, and we don't want a
 214          * (ticker) exception to happen while the flash
 215          * chip is in programming mode.
 216          */
 217 #if 0
 218         cflag = icache_status ();
 219         icache_disable ();
 220 #endif
 221         iflag = disable_interrupts ();
 222
 223         /* Start erase on unprotected sectors */
 224         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 225
 226                 debug ("Erasing sector %2d @ %08lX... ",
 227                         sect, info->start[sect]);
 228
 229                 /* arm simple, non interrupt dependent timer */
 230                 reset_timer_masked ();
 231
 232                 if (info->protect[sect] == 0) { /* not protected */
 233                         vu_long *addr = (vu_long *) (info->start[sect]);
 234
 235                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 236                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 237                         MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
 238
 239                         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 240                         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 241                         *addr = CMD_ERASE_CONFIRM;
 242
 243                         /* wait until flash is ready */
 244                         chip1 = chip2 = 0;
 245
 246                         do {
 247                                 result = *addr;
 248
 249                                 /* check timeout */
 250                                 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
 251                                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 252                                         chip1 = TMO;
 253                                         break;
 254                                 }
 255
 256                                 if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
 257                                         chip1 = READY;
 258
 259                                 if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
 260                                         chip1 = ERR;
 261
 262                                 if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
 263                                         chip2 = READY;
 264
 265                                 if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
 266                                         chip2 = ERR;
 267
 268                         } while (!chip1 || !chip2);
 269
 270                         MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 271
 272                         if (chip1 == ERR || chip2 == ERR) {
 273                                 rc = ERR_PROG_ERROR;
 274                                 goto outahere;
 275                         }
 276                         if (chip1 == TMO) {
 277                                 rc = ERR_TIMOUT;
 278                                 goto outahere;
 279                         }
 280                 }
 281         }
 282
 283 outahere:
 284         /* allow flash to settle - wait 10 ms */
 285         udelay_masked (10000);
 286
 287         if (iflag)
 288                 enable_interrupts ();
 289
 290 #if 0
 291         if (cflag)
 292                 icache_enable ();
 293 #endif
 294         return rc;
 295 }
 296
 297 /*-----------------------------------------------------------------------
 298  * Copy memory to flash
 299  */
 300
 301 volatile static int write_word (flash_info_t * info, ulong dest,
 302                                                                 ulong data)
 303 {
 304         vu_long *addr = (vu_long *) dest;
 305         ulong result;
 306         int rc = ERR_OK;
 307
 308 #if 0
 309         int cflag;
 310 #endif
 311         int iflag;
 312         int chip1, chip2;
 313
 314         /*
 315          * Check if Flash is (sufficiently) erased
 316          */
 317         result = *addr;
 318         if ((result & data) != data)
 319                 return ERR_NOT_ERASED;
 320
 321         /*
 322          * Disable interrupts which might cause a timeout
 323          * here. Remember that our exception vectors are
 324          * at address 0 in the flash, and we don't want a
 325          * (ticker) exception to happen while the flash
 326          * chip is in programming mode.
 327          */
 328 #if 0
 329         cflag = icache_status ();
 330         icache_disable ();
 331 #endif
 332         iflag = disable_interrupts ();
 333
 334         MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 335         MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 336         MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
 337         *addr = CMD_PROGRAM;
 338         *addr = data;
 339
 340         /* arm simple, non interrupt dependent timer */
 341         reset_timer_masked ();
 342
 343         /* wait until flash is ready */
 344         chip1 = chip2 = 0;
 345         do {
 346                 result = *addr;
 347
 348                 /* check timeout */
 349                 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
 350                         chip1 = ERR | TMO;
 351                         break;
 352                 }
 353                 if (!chip1 && ((result & 0x80) == (data & 0x80)))
 354                         chip1 = READY;
 355
 356                 if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
 357                         result = *addr;
 358
 359                         if ((result & 0x80) == (data & 0x80))
 360                                 chip1 = READY;
 361                         else
 362                                 chip1 = ERR;
 363                 }
 364
 365                 if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
 366                         chip2 = READY;
 367
 368                 if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
 369                         result = *addr;
 370
 371                         if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
 372                                 chip2 = READY;
 373                         else
 374                                 chip2 = ERR;
 375                 }
 376
 377         } while (!chip1 || !chip2);
 378
 379         *addr = CMD_READ_ARRAY;
 380
 381         if (chip1 == ERR || chip2 == ERR || *addr != data)
 382                 rc = ERR_PROG_ERROR;
 383
 384         if (iflag)
 385                 enable_interrupts ();
 386
 387 #if 0
 388         if (cflag)
 389                 icache_enable ();
 390 #endif
 391
 392         return rc;
 393 }
 394
 395 /*-----------------------------------------------------------------------
 396  * Copy memory to flash.
 397  */
 398
 399 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 400 {
 401         ulong cp, wp, data;
 402         int l;
 403         int i, rc;
 404
 405         wp = (addr & ~3);       /* get lower word aligned address */
 406
 407         /*
 408          * handle unaligned start bytes
 409          */
 410         if ((l = addr - wp) != 0) {
 411                 data = 0;
 412                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 413                         data = (data >> 8) | (*(uchar *) cp << 24);
 414                 }
 415                 for (; i < 4 && cnt > 0; ++i) {
 416                         data = (data >> 8) | (*src++ << 24);
 417                         --cnt;
 418                         ++cp;
 419                 }
 420                 for (; cnt == 0 && i < 4; ++i, ++cp) {
 421                         data = (data >> 8) | (*(uchar *) cp << 24);
 422                 }
 423
 424                 if ((rc = write_word (info, wp, data)) != 0) {
 425                         return (rc);
 426                 }
 427                 wp += 4;
 428         }
 429
 430         /*
 431          * handle word aligned part
 432          */
 433         while (cnt >= 4) {
 434                 if (((ulong)src) & 0x3) {
 435                         for (i = 0; i < 4; i++) {
 436                                 ((char *)&data)[i] = ((vu_char *)src)[i];
 437                         }
 438                 }
 439                 else {
 440                         data = *((vu_long *) src);
 441                 }
 442
 443                 if ((rc = write_word (info, wp, data)) != 0) {
 444                         return (rc);
 445                 }
 446                 src += 4;
 447                 wp += 4;
 448                 cnt -= 4;
 449         }
 450
 451         if (cnt == 0) {
 452                 return ERR_OK;
 453         }
 454
 455         /*
 456          * handle unaligned tail bytes
 457          */
 458         data = 0;
 459         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 460                 data = (data >> 8) | (*src++ << 24);
 461                 --cnt;
 462         }
 463         for (; i < 4; ++i, ++cp) {
 464                 data = (data >> 8) | (*(uchar *) cp << 24);
 465         }
 466
 467         return write_word (info, wp, data);
 468 }
 469
 470 /*-----------------------------------------------------------------------
 471  */
 472
 473 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 474 {
 475         ulong value;
 476
 477         /* Write auto select command sequence and read Manufacturer ID */
 478         addr[0x0555] = CMD_UNLOCK1;
 479         addr[0x02AA] = CMD_UNLOCK2;
 480         addr[0x0555] = CMD_READ_MANF_ID;
 481
 482         value = addr[0];
 483
 484         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 485
 486         switch (value) {
 487         case AMD_MANUFACT:
 488                 info->flash_id = FLASH_MAN_AMD;
 489                 break;
 490         case FUJ_MANUFACT:
 491                 info->flash_id = FLASH_MAN_FUJ;
 492                 break;
 493         default:
 494                 info->flash_id = FLASH_UNKNOWN;
 495                 info->sector_count = 0;
 496                 info->size = 0;
 497                 addr[0] = 0x00FF00FF;           /* restore read mode */
 498                 debug ("## flash_init: unknown manufacturer\n");
 499                 return (0);                     /* no or unknown flash  */
 500         }
 501
 502         value = addr[1];                        /* device ID            */
 503
 504         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 505
 506         switch (value) {
 507         case AMD_ID_LV320B:
 508                 info->flash_id += FLASH_AM320B;
 509                 info->sector_count = 71;
 510                 info->size = 0x00800000;
 511
 512                 addr[0] = 0x00FF00FF;           /* restore read mode */
 513                 break;                          /* =>  8 MB             */
 514
 515         case AMD_ID_LV640U:
 516                 info->flash_id += FLASH_AM640U;
 517                 info->sector_count = 128;
 518                 info->size = 0x01000000;
 519
 520                 addr[0] = 0x00F000F0;           /* restore read mode */
 521                 break;                          /* => 16 MB             */
 522
 523         default:
 524                 debug ("## flash_init: unknown flash chip\n");
 525                 info->flash_id = FLASH_UNKNOWN;
 526                 addr[0] = 0x00FF00FF;           /* restore read mode */
 527                 return (0);                     /* => no or unknown flash */
 528
 529         }
 530
 531         if (info->sector_count > CFG_MAX_FLASH_SECT) {
 532                 printf ("** ERROR: sector count %d > max (%d) **\n",
 533                         info->sector_count, CFG_MAX_FLASH_SECT);
 534                 info->sector_count = CFG_MAX_FLASH_SECT;
 535         }
 536
 537         return (info->size);
 538 }