board/v37/flash.c

   1 /*
   2  * (C) Copyright 2003
   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 /*
  25  * Yoo. Jonghoon, IPone, yooth@ipone.co.kr
  26  * U-Boot port on RPXlite board
  27  *
  28  * Some of flash control words are modified. (from 2x16bit device
  29  * to 4x8bit device)
  30  * RPXLite board I tested has only 4 AM29LV800BB devices. Other devices
  31  * are not tested.
  32  *
  33  * (?) Does an RPXLite board which
  34  *      does not use AM29LV800 flash memory exist ?
  35  *      I don't know...
  36  */
  37
  38 #include <common.h>
  39 #include <mpc8xx.h>
  40
  41 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  42
  43 /*-----------------------------------------------------------------------
  44  * Functions
  45  */
  46 static ulong flash_get_size ( short manu, short dev_id, flash_info_t *info);
  47 static int write_word (flash_info_t *info, ulong dest, ulong data);
  48 static void flash_get_offsets (ulong base, flash_info_t *info, int two_chips);
  49 static void flash_get_id_word( void *ptr,  short *ptr_manuf, short *ptr_dev_id);
  50 static void flash_get_id_long( void *ptr,  short *ptr_manuf, short *ptr_dev_id);
  51
  52 /*-----------------------------------------------------------------------
  53  */
  54
  55 unsigned long flash_init (void)
  56 {
  57         volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
  58         volatile memctl8xx_t *memctl = &immap->im_memctl;
  59         unsigned long size_b0, size_b1;
  60         short manu, dev_id;
  61         int i;
  62
  63         /* Init: no FLASHes known */
  64         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  65                 flash_info[i].flash_id = FLASH_UNKNOWN;
  66         }
  67
  68         /* Do sizing to get full correct info */
  69
  70         flash_get_id_word((void*)CFG_FLASH_BASE0,&manu,&dev_id);
  71
  72         size_b0 = flash_get_size(manu, dev_id, &flash_info[0]);
  73
  74         flash_get_offsets (CFG_FLASH_BASE0, &flash_info[0],0);
  75
  76         memctl->memc_or0 = CFG_OR_TIMING_FLASH | (0 - size_b0);
  77
  78 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE0
  79         /* monitor protection ON by default */
  80         flash_protect(FLAG_PROTECT_SET,
  81                       CFG_MONITOR_BASE,
  82                       CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
  83                       &flash_info[0]);
  84 #endif
  85
  86         flash_get_id_long((void*)CFG_FLASH_BASE1,&manu,&dev_id);
  87
  88         size_b1 = 2 * flash_get_size(manu, dev_id, &flash_info[1]);
  89
  90         flash_get_offsets(CFG_FLASH_BASE1, &flash_info[1],1);
  91
  92         memctl->memc_or1 = CFG_OR_TIMING_FLASH | (0 - size_b1);
  93
  94         flash_info[0].size = size_b0;
  95         flash_info[1].size = size_b1;
  96
  97         return (size_b0+size_b1);
  98 }
  99
 100 /*-----------------------------------------------------------------------
 101  */
 102 static void flash_get_offsets (ulong base, flash_info_t *info, int two_chips)
 103 {
 104         int i, addr_shift;
 105         vu_short *addr = (vu_short*)base;
 106
 107         addr[0x555] = 0x00AA ;
 108         addr[0xAAA] = 0x0055 ;
 109         addr[0x555] = 0x0090 ;
 110
 111         addr_shift = (two_chips ? 2 : 1 );
 112
 113         /* set up sector start address table */
 114         if (info->flash_id & FLASH_BTYPE) {
 115                 /* set sector offsets for bottom boot block type        */
 116                 info->start[0] = base + (0x00000000<<addr_shift);
 117                 info->start[1] = base + (0x00002000<<addr_shift);
 118                 info->start[2] = base + (0x00003000<<addr_shift);
 119                 info->start[3] = base + (0x00004000<<addr_shift);
 120                 for (i = 4; i < info->sector_count; i++) {
 121                         info->start[i] = base + ((i-3) * (0x00008000<<addr_shift)) ;
 122                 }
 123         } else {
 124                 /* set sector offsets for top boot block type           */
 125                 i = info->sector_count - 1;
 126                 info->start[i--] = base + info->size - (0x00002000<<addr_shift);
 127                 info->start[i--] = base + info->size - (0x00003000<<addr_shift);
 128                 info->start[i--] = base + info->size - (0x00004000<<addr_shift);
 129                 for (; i >= 0; i--) {
 130                         info->start[i] = base + i * (0x00008000<<addr_shift);
 131                 }
 132         }
 133
 134         /* check for protected sectors */
 135         for (i = 0; i < info->sector_count; i++) {
 136                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 137                 /* D0 = 1 if protected */
 138                 addr = (vu_short *)(info->start[i]);
 139                 info->protect[i] = addr[1<<addr_shift] & 1 ;
 140         }
 141
 142         addr = (vu_short *)info->start[0];
 143         *addr = 0xF0F0; /* reset bank */
 144 }
 145
 146 /*-----------------------------------------------------------------------
 147  */
 148 void flash_print_info  (flash_info_t *info)
 149 {
 150         int i;
 151
 152         if (info->flash_id == FLASH_UNKNOWN) {
 153                 printf ("missing or unknown FLASH type\n");
 154                 return;
 155         }
 156
 157         switch (info->flash_id & FLASH_VENDMASK) {
 158         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 159         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 160         case FLASH_MAN_TOSH:    printf ("TOSHIBA ");            break;
 161         default:                printf ("Unknown Vendor ");     break;
 162         }
 163
 164         switch (info->flash_id & FLASH_TYPEMASK) {
 165         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 166                                 break;
 167         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 168                                 break;
 169         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 170                                 break;
 171         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 172                                 break;
 173         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 174                                 break;
 175         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 176                                 break;
 177         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 178                                 break;
 179         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 180                                 break;
 181         default:                printf ("Unknown Chip Type\n");
 182                                 break;
 183         }
 184
 185         printf ("  Size: %ld MB in %d Sectors\n",
 186                 info->size >> 20, info->sector_count);
 187
 188         printf ("  Sector Start Addresses:");
 189         for (i=0; i<info->sector_count; ++i) {
 190                 if ((i % 5) == 0)
 191                         printf ("\n   ");
 192                 printf (" %08lX%s",
 193                         info->start[i],
 194                         info->protect[i] ? " (RO)" : "     "
 195                 );
 196         }
 197         printf ("\n");
 198 }
 199
 200 /*-----------------------------------------------------------------------
 201  */
 202
 203
 204 /*-----------------------------------------------------------------------
 205  */
 206
 207 /*
 208  * The following code cannot be run from FLASH!
 209  */
 210
 211 static void flash_get_id_word( void *ptr,  short *ptr_manuf, short *ptr_dev_id)
 212 {
 213         vu_short *addr = (vu_short*)ptr;
 214
 215         addr[0x555] = 0x00AA ;
 216         addr[0xAAA] = 0x0055 ;
 217         addr[0x555] = 0x0090 ;
 218
 219         *ptr_manuf  = addr[0];
 220         *ptr_dev_id = addr[1];
 221
 222         addr[0] = 0xf0f0;       /* return to normal */
 223 }
 224
 225 static void flash_get_id_long( void *ptr,  short *ptr_manuf, short *ptr_dev_id)
 226 {
 227         vu_short *addr = (vu_short*)ptr;
 228         vu_short *addr1, *addr2, *addr3;
 229
 230         addr1 = (vu_short*) ( ((int)ptr) + (0x5555<<2) );
 231         addr2 = (vu_short*) ( ((int)ptr) + (0x2AAA<<2) );
 232         addr3 = (vu_short*) ( ((int)ptr) + (0x5555<<2) );
 233
 234         *addr1 = 0xAAAA;
 235         *addr2 = 0x5555;
 236         *addr3 = 0x9090;
 237
 238         *ptr_manuf  = addr[0];
 239         *ptr_dev_id = addr[2];
 240
 241         addr[0] = 0xf0f0;       /* return to normal */
 242 }
 243
 244 static ulong flash_get_size ( short manu, short dev_id, flash_info_t *info)
 245 {
 246         switch (manu) {
 247         case ((short)AMD_MANUFACT):
 248                 info->flash_id = FLASH_MAN_AMD;
 249                 break;
 250         case ((short)FUJ_MANUFACT):
 251                 info->flash_id = FLASH_MAN_FUJ;
 252                 break;
 253         case ((short)TOSH_MANUFACT):
 254                 info->flash_id = FLASH_MAN_TOSH;
 255                 break;
 256         default:
 257                 info->flash_id = FLASH_UNKNOWN;
 258                 info->sector_count = 0;
 259                 info->size = 0;
 260                 return (0);                     /* no or unknown flash  */
 261         }
 262
 263
 264         switch (dev_id) {
 265         case ((short)TOSH_ID_FVT160):
 266                 info->flash_id += FLASH_AM160T;
 267                 info->sector_count = 35;
 268                 info->size = 0x00200000;
 269                 break;                          /* => 1 MB              */
 270
 271         case ((short)TOSH_ID_FVB160):
 272                 info->flash_id += FLASH_AM160B;
 273                 info->sector_count = 35;
 274                 info->size = 0x00200000;
 275                 break;                          /* => 1 MB              */
 276
 277         case ((short)AMD_ID_LV400T):
 278                 info->flash_id += FLASH_AM400T;
 279                 info->sector_count = 11;
 280                 info->size = 0x00100000;
 281                 break;                          /* => 1 MB              */
 282
 283         case ((short)AMD_ID_LV400B):
 284                 info->flash_id += FLASH_AM400B;
 285                 info->sector_count = 11;
 286                 info->size = 0x00100000;
 287                 break;                          /* => 1 MB              */
 288
 289         case ((short)AMD_ID_LV800T):
 290                 info->flash_id += FLASH_AM800T;
 291                 info->sector_count = 19;
 292                 info->size = 0x00200000;
 293                 break;                          /* => 2 MB              */
 294
 295         case ((short)AMD_ID_LV800B):
 296                 info->flash_id += FLASH_AM800B;
 297                 info->sector_count = 19;
 298                 info->size = 0x00400000;        //%%% Size doubled by yooth
 299                 break;                          /* => 4 MB              */
 300
 301         case ((short)AMD_ID_LV160T):
 302                 info->flash_id += FLASH_AM160T;
 303                 info->sector_count = 35;
 304                 info->size = 0x00200000;
 305                 break;                          /* => 4 MB              */
 306
 307         case ((short)AMD_ID_LV160B):
 308                 info->flash_id += FLASH_AM160B;
 309                 info->sector_count = 35;
 310                 info->size = 0x00200000;
 311                 break;                          /* => 4 MB              */
 312         default:
 313                 info->flash_id = FLASH_UNKNOWN;
 314                 return (0);                     /* => no or unknown flash */
 315
 316         }
 317
 318         return(info->size);
 319 }
 320
 321
 322 /*-----------------------------------------------------------------------
 323  */
 324
 325 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 326 {
 327         vu_short *addr = (vu_short*)(info->start[0]);
 328         int flag, prot, sect, l_sect;
 329         ulong start, now, last;
 330
 331         if ((s_first < 0) || (s_first > s_last)) {
 332                 if (info->flash_id == FLASH_UNKNOWN) {
 333                         printf ("- missing\n");
 334                 } else {
 335                         printf ("- no sectors to erase\n");
 336                 }
 337                 return 1;
 338         }
 339
 340         if ((info->flash_id == FLASH_UNKNOWN) ||
 341             (info->flash_id > FLASH_AMD_COMP)) {
 342                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 343                         info->flash_id);
 344                 return 1;
 345         }
 346
 347         prot = 0;
 348         for (sect=s_first; sect<=s_last; ++sect) {
 349                 if (info->protect[sect]) {
 350                         prot++;
 351                 }
 352         }
 353
 354         if (prot) {
 355                 printf ("- Warning: %d protected sectors will not be erased!\n",
 356                         prot);
 357         } else {
 358                 printf ("\n");
 359         }
 360
 361         l_sect = -1;
 362
 363         /* Disable interrupts which might cause a timeout here */
 364         flag = disable_interrupts();
 365
 366         addr[0x555] = (vu_short)0xAAAAAAAA;
 367         addr[0xAAA] = (vu_short)0x55555555;
 368         addr[0x555] = (vu_short)0x80808080;
 369         addr[0x555] = (vu_short)0xAAAAAAAA;
 370         addr[0xAAA] = (vu_short)0x55555555;
 371
 372         /* Start erase on unprotected sectors */
 373         for (sect = s_first; sect<=s_last; sect++) {
 374                 if (info->protect[sect] == 0) { /* not protected */
 375                         addr = (vu_short *)(info->start[sect]) ;
 376                         addr[0] = (vu_short)0x30303030 ;
 377                         l_sect = sect;
 378                 }
 379         }
 380
 381         /* re-enable interrupts if necessary */
 382         if (flag)
 383                 enable_interrupts();
 384
 385         /* wait at least 80us - let's wait 1 ms */
 386         udelay (1000);
 387
 388         /*
 389          * We wait for the last triggered sector
 390          */
 391         if (l_sect < 0)
 392                 goto DONE;
 393
 394         start = get_timer (0);
 395         last  = start;
 396         addr = (vu_short *)(info->start[l_sect]);
 397         while ((addr[0] & 0x8080) != 0x8080) {
 398                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 399                         printf ("Timeout\n");
 400                         return 1;
 401                 }
 402                 /* show that we're waiting */
 403                 if ((now - last) > 1000) {      /* every second */
 404                         putc ('.');
 405                         last = now;
 406                 }
 407         }
 408
 409 DONE:
 410         /* reset to read mode */
 411         addr = (vu_short *)info->start[0];
 412         addr[0] = (vu_short)0xF0F0F0F0; /* reset bank */
 413
 414         printf (" done\n");
 415         return 0;
 416 }
 417
 418 /*-----------------------------------------------------------------------
 419  * Copy memory to flash, returns:
 420  * 0 - OK
 421  * 1 - write timeout
 422  * 2 - Flash not erased
 423  */
 424
 425 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 426 {
 427         ulong cp, wp, data;
 428         int i, l, rc;
 429
 430         wp = (addr & ~3);       /* get lower word aligned address */
 431
 432         /*
 433          * handle unaligned start bytes
 434          */
 435         if ((l = addr - wp) != 0) {
 436                 data = 0;
 437                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 438                         data = (data << 8) | (*(uchar *)cp);
 439                 }
 440                 for (; i<4 && cnt>0; ++i) {
 441                         data = (data << 8) | *src++;
 442                         --cnt;
 443                         ++cp;
 444                 }
 445                 for (; cnt==0 && i<4; ++i, ++cp) {
 446                         data = (data << 8) | (*(uchar *)cp);
 447                 }
 448
 449                 if ((rc = write_word(info, wp, data)) != 0) {
 450                         return (rc);
 451                 }
 452                 wp += 4;
 453         }
 454
 455         /*
 456          * handle word aligned part
 457          */
 458         while (cnt >= 4) {
 459                 data = 0;
 460                 for (i=0; i<4; ++i) {
 461                         data = (data << 8) | *src++;
 462                 }
 463                 if ((rc = write_word(info, wp, data)) != 0) {
 464                         return (rc);
 465                 }
 466                 wp  += 4;
 467                 cnt -= 4;
 468         }
 469
 470         if (cnt == 0) {
 471                 return (0);
 472         }
 473
 474         /*
 475          * handle unaligned tail bytes
 476          */
 477         data = 0;
 478         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 479                 data = (data << 8) | *src++;
 480                 --cnt;
 481         }
 482         for (; i<4; ++i, ++cp) {
 483                 data = (data << 8) | (*(uchar *)cp);
 484         }
 485
 486         return (write_word(info, wp, data));
 487 }
 488
 489 /*-----------------------------------------------------------------------
 490  * Write a word to Flash, returns:
 491  * 0 - OK
 492  * 1 - write timeout
 493  * 2 - Flash not erased
 494  */
 495 static int write_word (flash_info_t *info, ulong dest, ulong data)
 496 {
 497         vu_short *addr = (vu_short *)(info->start[0]);
 498         vu_short sdata;
 499
 500         ulong start;
 501         int flag;
 502
 503         /* Check if Flash is (sufficiently) erased */
 504         if ((*((vu_long *)dest) & data) != data) {
 505                 return (2);
 506         }
 507
 508         /* First write upper 16 bits */
 509         sdata = (short)(data>>16);
 510
 511         /* Disable interrupts which might cause a timeout here */
 512         flag = disable_interrupts();
 513
 514         addr[0x555] = 0xAAAA;
 515         addr[0xAAA] = 0x5555;
 516         addr[0x555] = 0xA0A0;
 517
 518         *((vu_short *)dest) = sdata;
 519
 520         /* re-enable interrupts if necessary */
 521         if (flag)
 522                 enable_interrupts();
 523
 524         /* data polling for D7 */
 525         start = get_timer (0);
 526         while ((*((vu_short *)dest) & 0x8080) != (sdata & 0x8080)) {
 527                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 528                         return (1);
 529                 }
 530         }
 531
 532         /* Now write lower 16 bits */
 533         sdata = (short)(data&0xffff);
 534
 535         /* Disable interrupts which might cause a timeout here */
 536         flag = disable_interrupts();
 537
 538         addr[0x555] = 0xAAAA;
 539         addr[0xAAA] = 0x5555;
 540         addr[0x555] = 0xA0A0;
 541
 542         *((vu_short *)dest + 1) = sdata;
 543
 544         /* re-enable interrupts if necessary */
 545         if (flag)
 546                 enable_interrupts();
 547
 548         /* data polling for D7 */
 549         start = get_timer (0);
 550         while ((*((vu_short *)dest + 1) & 0x8080) != (sdata & 0x8080)) {
 551                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 552                         return (1);
 553                 }
 554         }
 555         return (0);
 556 }
 557
 558 /*-----------------------------------------------------------------------
 559  */