board/rmu/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_word (flash_info_t *info, ulong dest, ulong 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_b0 ;
  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         size_b0 = flash_get_size((vu_long *)FLASH_BASE_PRELIM, &flash_info[0]);
  53         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  54                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  55                         size_b0, size_b0<<20);
  56         }
  57
  58         /* Remap FLASH according to real size */
  59         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
  60         memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
  61
  62         /* Re-do sizing to get full correct info */
  63
  64         size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
  65         flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
  66
  67 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
  68         /* monitor protection ON by default */
  69         flash_protect(FLAG_PROTECT_SET,
  70                       CFG_MONITOR_BASE,
  71                       CFG_MONITOR_BASE+monitor_flash_len-1,
  72                       &flash_info[0]);
  73 #endif
  74
  75 #ifdef  CFG_ENV_IS_IN_FLASH
  76         /* ENV protection ON by default */
  77         flash_protect(FLAG_PROTECT_SET,
  78                       CFG_ENV_ADDR,
  79                       CFG_ENV_ADDR+CFG_ENV_SIZE-1,
  80                       &flash_info[0]);
  81 #endif
  82
  83         flash_info[0].size = size_b0;
  84
  85         return (size_b0);
  86 }
  87
  88 /*-----------------------------------------------------------------------
  89  */
  90 static void flash_get_offsets (ulong base, flash_info_t *info)
  91 {
  92         int i;
  93
  94         /* set up sector start address table */
  95         if (info->flash_id & FLASH_BTYPE) {
  96                 /* set sector offsets for bottom boot block type        */
  97                 info->start[0] = base + 0x00000000;
  98                 info->start[1] = base + 0x00010000;
  99                 info->start[2] = base + 0x00018000;
 100                 info->start[3] = base + 0x00020000;
 101                 for (i = 4; i < info->sector_count; i++) {
 102                         info->start[i] = base + ((i-3) * 0x00040000) ;
 103                 }
 104         } else {
 105                 /* set sector offsets for top boot block type           */
 106                 i = info->sector_count - 1;
 107                 info->start[i--] = base + info->size - 0x00010000;
 108                 info->start[i--] = base + info->size - 0x00018000;
 109                 info->start[i--] = base + info->size - 0x00020000;
 110                 for (; i >= 0; i--) {
 111                         info->start[i] = base + i * 0x00040000;
 112                 }
 113         }
 114
 115 }
 116
 117 /*-----------------------------------------------------------------------
 118  */
 119 void flash_print_info  (flash_info_t *info)
 120 {
 121         int i;
 122
 123         if (info->flash_id == FLASH_UNKNOWN) {
 124                 printf ("missing or unknown FLASH type\n");
 125                 return;
 126         }
 127
 128         switch (info->flash_id & FLASH_VENDMASK) {
 129         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 130         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 131         default:                printf ("Unknown Vendor ");     break;
 132         }
 133
 134         switch (info->flash_id & FLASH_TYPEMASK) {
 135         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 136                                 break;
 137         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 138                                 break;
 139         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 140                                 break;
 141         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 142                                 break;
 143         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 144                                 break;
 145         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 146                                 break;
 147         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 148                                 break;
 149         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 150                                 break;
 151         default:                printf ("Unknown Chip Type\n");
 152                                 break;
 153         }
 154
 155         printf ("  Size: %ld MB in %d Sectors\n",
 156                 info->size >> 20, info->sector_count);
 157
 158         printf ("  Sector Start Addresses:");
 159         for (i=0; i<info->sector_count; ++i) {
 160                 if ((i % 5) == 0)
 161                         printf ("\n   ");
 162                 printf (" %08lX%s",
 163                         info->start[i],
 164                         info->protect[i] ? " (RO)" : "     "
 165                 );
 166         }
 167         printf ("\n");
 168         return;
 169 }
 170
 171 /*-----------------------------------------------------------------------
 172  */
 173
 174
 175 /*-----------------------------------------------------------------------
 176  */
 177
 178 /*
 179  * The following code cannot be run from FLASH!
 180  */
 181
 182 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 183 {
 184         short i;
 185         ulong value;
 186         ulong base = (ulong)addr;
 187
 188         /* Write auto select command: read Manufacturer ID */
 189         addr[0xAAA] = 0xAAAAAAAA ;
 190         addr[0x555] = 0x55555555 ;
 191         addr[0xAAA] = 0x90909090 ;
 192
 193         value = addr[0] ;
 194
 195         switch (value & 0x00FF00FF) {
 196         case AMD_MANUFACT:
 197                 info->flash_id = FLASH_MAN_AMD;
 198                 break;
 199         case FUJ_MANUFACT:
 200                 info->flash_id = FLASH_MAN_FUJ;
 201                 break;
 202         default:
 203                 info->flash_id = FLASH_UNKNOWN;
 204                 info->sector_count = 0;
 205                 info->size = 0;
 206                 return (0);                     /* no or unknown flash  */
 207         }
 208
 209         value = addr[2] ;               /* device ID            */
 210
 211         switch (value & 0x00FF00FF) {
 212         case (AMD_ID_LV400T & 0x00FF00FF):
 213                 info->flash_id += FLASH_AM400T;
 214                 info->sector_count = 11;
 215                 info->size = 0x00100000;
 216                 break;                          /* => 1 MB              */
 217
 218         case (AMD_ID_LV400B & 0x00FF00FF):
 219                 info->flash_id += FLASH_AM400B;
 220                 info->sector_count = 11;
 221                 info->size = 0x00100000;
 222                 break;                          /* => 1 MB              */
 223
 224         case (AMD_ID_LV800T & 0x00FF00FF):
 225                 info->flash_id += FLASH_AM800T;
 226                 info->sector_count = 19;
 227                 info->size = 0x00200000;
 228                 break;                          /* => 2 MB              */
 229
 230         case (AMD_ID_LV800B & 0x00FF00FF):
 231                 info->flash_id += FLASH_AM800B;
 232                 info->sector_count = 19;
 233                 info->size = 0x00400000;        /*%%% Size doubled by yooth */
 234                 break;                          /* => 4 MB              */
 235
 236         case (AMD_ID_LV160T & 0x00FF00FF):
 237                 info->flash_id += FLASH_AM160T;
 238                 info->sector_count = 35;
 239                 info->size = 0x00400000;
 240                 break;                          /* => 4 MB              */
 241
 242         case (AMD_ID_LV160B & 0x00FF00FF):
 243                 info->flash_id += FLASH_AM160B;
 244                 info->sector_count = 35;
 245                 info->size = 0x00800000;
 246                 break;                          /* => 8 MB              */
 247 #if 0   /* enable when device IDs are available */
 248         case AMD_ID_LV320T:
 249                 info->flash_id += FLASH_AM320T;
 250                 info->sector_count = 67;
 251                 info->size = 0x00800000;
 252                 break;                          /* => 8 MB              */
 253
 254         case AMD_ID_LV320B:
 255                 info->flash_id += FLASH_AM320B;
 256                 info->sector_count = 67;
 257                 info->size = 0x01000000;
 258                 break;                          /* => 16 MB             */
 259 #endif
 260         default:
 261                 info->flash_id = FLASH_UNKNOWN;
 262                 return (0);                     /* => no or unknown flash */
 263
 264         }
 265         /*%%% sector start address modified */
 266         /* set up sector start address table */
 267         if (info->flash_id & FLASH_BTYPE) {
 268                 /* set sector offsets for bottom boot block type        */
 269                 info->start[0] = base + 0x00000000;
 270                 info->start[1] = base + 0x00010000;
 271                 info->start[2] = base + 0x00018000;
 272                 info->start[3] = base + 0x00020000;
 273                 for (i = 4; i < info->sector_count; i++) {
 274                         info->start[i] = base + ((i-3) * 0x00040000) ;
 275                 }
 276         } else {
 277                 /* set sector offsets for top boot block type           */
 278                 i = info->sector_count - 1;
 279                 info->start[i--] = base + info->size - 0x00010000;
 280                 info->start[i--] = base + info->size - 0x00018000;
 281                 info->start[i--] = base + info->size - 0x00020000;
 282                 for (; i >= 0; i--) {
 283                         info->start[i] = base + i * 0x00040000;
 284                 }
 285         }
 286
 287         /* check for protected sectors */
 288         for (i = 0; i < info->sector_count; i++) {
 289                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 290                 /* D0 = 1 if protected */
 291                 addr = (volatile unsigned long *)(info->start[i]);
 292                 info->protect[i] = addr[4] & 1 ;
 293         }
 294
 295         /*
 296          * Prevent writes to uninitialized FLASH.
 297          */
 298         if (info->flash_id != FLASH_UNKNOWN) {
 299                 addr = (volatile unsigned long *)info->start[0];
 300
 301                 *addr = 0xF0F0F0F0;     /* reset bank */
 302         }
 303
 304         return (info->size);
 305 }
 306
 307
 308 /*-----------------------------------------------------------------------
 309  */
 310
 311 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 312 {
 313         vu_long *addr = (vu_long*)(info->start[0]);
 314         int flag, prot, sect, l_sect;
 315         ulong start, now, last;
 316
 317         if ((s_first < 0) || (s_first > s_last)) {
 318                 if (info->flash_id == FLASH_UNKNOWN) {
 319                         printf ("- missing\n");
 320                 } else {
 321                         printf ("- no sectors to erase\n");
 322                 }
 323                 return 1;
 324         }
 325
 326         if ((info->flash_id == FLASH_UNKNOWN) ||
 327             (info->flash_id > FLASH_AMD_COMP)) {
 328                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 329                         info->flash_id);
 330                 return 1;
 331         }
 332
 333         prot = 0;
 334         for (sect=s_first; sect<=s_last; ++sect) {
 335                 if (info->protect[sect]) {
 336                         prot++;
 337                 }
 338         }
 339
 340         if (prot) {
 341                 printf ("- Warning: %d protected sectors will not be erased!\n",
 342                         prot);
 343         } else {
 344                 printf ("\n");
 345         }
 346
 347         l_sect = -1;
 348
 349         /* Disable interrupts which might cause a timeout here */
 350         flag = disable_interrupts();
 351
 352         addr[0xAAA] = 0xAAAAAAAA;
 353         addr[0x555] = 0x55555555;
 354         addr[0xAAA] = 0x80808080;
 355         addr[0xAAA] = 0xAAAAAAAA;
 356         addr[0x555] = 0x55555555;
 357
 358         /* Start erase on unprotected sectors */
 359         for (sect = s_first; sect<=s_last; sect++) {
 360                 if (info->protect[sect] == 0) { /* not protected */
 361                         addr = (vu_long *)(info->start[sect]) ;
 362                         addr[0] = 0x30303030 ;
 363                         l_sect = sect;
 364                 }
 365         }
 366
 367         /* re-enable interrupts if necessary */
 368         if (flag)
 369                 enable_interrupts();
 370
 371         /* wait at least 80us - let's wait 1 ms */
 372         udelay (1000);
 373
 374         /*
 375          * We wait for the last triggered sector
 376          */
 377         if (l_sect < 0)
 378                 goto DONE;
 379
 380         start = get_timer (0);
 381         last  = start;
 382         addr = (vu_long *)(info->start[l_sect]);
 383         while ((addr[0] & 0x80808080) != 0x80808080) {
 384                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 385                         printf ("Timeout\n");
 386                         return 1;
 387                 }
 388                 /* show that we're waiting */
 389                 if ((now - last) > 1000) {      /* every second */
 390                         putc ('.');
 391                         last = now;
 392                 }
 393         }
 394
 395 DONE:
 396         /* reset to read mode */
 397         addr = (vu_long *)info->start[0];
 398         addr[0] = 0xF0F0F0F0;   /* reset bank */
 399
 400         printf (" done\n");
 401         return 0;
 402 }
 403
 404 /*-----------------------------------------------------------------------
 405  * Copy memory to flash, returns:
 406  * 0 - OK
 407  * 1 - write timeout
 408  * 2 - Flash not erased
 409  */
 410
 411 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 412 {
 413         ulong cp, wp, data;
 414         int i, l, rc;
 415
 416         wp = (addr & ~3);       /* get lower word aligned address */
 417
 418         /*
 419          * handle unaligned start bytes
 420          */
 421         if ((l = addr - wp) != 0) {
 422                 data = 0;
 423                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 424                         data = (data << 8) | (*(uchar *)cp);
 425                 }
 426                 for (; i<4 && cnt>0; ++i) {
 427                         data = (data << 8) | *src++;
 428                         --cnt;
 429                         ++cp;
 430                 }
 431                 for (; cnt==0 && i<4; ++i, ++cp) {
 432                         data = (data << 8) | (*(uchar *)cp);
 433                 }
 434
 435                 if ((rc = write_word(info, wp, data)) != 0) {
 436                         return (rc);
 437                 }
 438                 wp += 4;
 439         }
 440
 441         /*
 442          * handle word aligned part
 443          */
 444         while (cnt >= 4) {
 445                 data = 0;
 446                 for (i=0; i<4; ++i) {
 447                         data = (data << 8) | *src++;
 448                 }
 449                 if ((rc = write_word(info, wp, data)) != 0) {
 450                         return (rc);
 451                 }
 452                 wp  += 4;
 453                 cnt -= 4;
 454         }
 455
 456         if (cnt == 0) {
 457                 return (0);
 458         }
 459
 460         /*
 461          * handle unaligned tail bytes
 462          */
 463         data = 0;
 464         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 465                 data = (data << 8) | *src++;
 466                 --cnt;
 467         }
 468         for (; i<4; ++i, ++cp) {
 469                 data = (data << 8) | (*(uchar *)cp);
 470         }
 471
 472         return (write_word(info, wp, data));
 473 }
 474
 475 /*-----------------------------------------------------------------------
 476  * Write a word to Flash, returns:
 477  * 0 - OK
 478  * 1 - write timeout
 479  * 2 - Flash not erased
 480  */
 481 static int write_word (flash_info_t *info, ulong dest, ulong data)
 482 {
 483         vu_long *addr = (vu_long *)(info->start[0]);
 484         ulong start;
 485         int flag;
 486
 487         /* Check if Flash is (sufficiently) erased */
 488         if ((*((vu_long *)dest) & data) != data) {
 489                 return (2);
 490         }
 491         /* Disable interrupts which might cause a timeout here */
 492         flag = disable_interrupts();
 493
 494         addr[0xAAA] = 0xAAAAAAAA;
 495         addr[0x555] = 0x55555555;
 496         addr[0xAAA] = 0xA0A0A0A0;
 497
 498         *((vu_long *)dest) = data;
 499
 500         /* re-enable interrupts if necessary */
 501         if (flag)
 502                 enable_interrupts();
 503
 504         /* data polling for D7 */
 505         start = get_timer (0);
 506         while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
 507                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 508                         return (1);
 509                 }
 510         }
 511         return (0);
 512 }
 513
 514 /*-----------------------------------------------------------------------
 515  */