board/stxgp3/flash.c

   1 /*
   2  * (C) Copyright 2003, Dan Malek, Embedded Edge, LLC.  <dan@embeddededge.com>
   3  * Copied from ADS85xx.
   4  * Updated to support the Silicon Tx GP3 8560.  We should only find
   5  * two Intel 28F640 parts in 16-bit mode (i.e. 32-bit wide flash),
   6  * but I left other code here in case people order custom boards.
   7  *
   8  * (C) Copyright 2003 Motorola Inc.
   9  *  Xianghua Xiao,(X.Xiao@motorola.com)
  10  *
  11  * (C) Copyright 2000, 2001
  12  *  Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  13  *
  14  * (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
  15  * Add support the Sharp chips on the mpc8260ads.
  16  * I started with board/ip860/flash.c and made changes I found in
  17  * the MTD project by David Schleef.
  18  *
  19  * See file CREDITS for list of people who contributed to this
  20  * project.
  21  *
  22  * This program is free software; you can redistribute it and/or
  23  * modify it under the terms of the GNU General Public License as
  24  * published by the Free Software Foundation; either version 2 of
  25  * the License, or (at your option) any later version.
  26  *
  27  * This program is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  * GNU General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License
  33  * along with this program; if not, write to the Free Software
  34  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  35  * MA 02111-1307 USA
  36  */
  37
  38 #include <common.h>
  39
  40 #if !defined(CFG_NO_FLASH)
  41
  42 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  43
  44 #if defined(CFG_ENV_IS_IN_FLASH)
  45 # ifndef  CFG_ENV_ADDR
  46 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  47 # endif
  48 # ifndef  CFG_ENV_SIZE
  49 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  50 # endif
  51 # ifndef  CFG_ENV_SECT_SIZE
  52 #  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
  53 # endif
  54 #endif
  55
  56 #undef DEBUG
  57
  58 /*-----------------------------------------------------------------------
  59  * Functions
  60  */
  61 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  62 static int write_word (flash_info_t *info, ulong dest, ulong data);
  63 static int clear_block_lock_bit(vu_long * addr);
  64 /*-----------------------------------------------------------------------
  65  */
  66
  67 unsigned long flash_init (void)
  68 {
  69         unsigned long size;
  70         int i;
  71
  72         /* Init: enable write,
  73          * or we cannot even write flash commands
  74          */
  75         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  76                 flash_info[i].flash_id = FLASH_UNKNOWN;
  77
  78                 /* set the default sector offset */
  79         }
  80
  81         /* Static FLASH Bank configuration here - FIXME XXX */
  82
  83         size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
  84
  85         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  86                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  87                         size, size<<20);
  88         }
  89
  90         /* Re-do sizing to get full correct info */
  91         size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
  92
  93         flash_info[0].size = size;
  94
  95 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
  96         /* monitor protection ON by default */
  97         flash_protect(FLAG_PROTECT_SET,
  98                       CFG_MONITOR_BASE,
  99                       CFG_MONITOR_BASE+monitor_flash_len-1,
 100                       &flash_info[0]);
 101
 102 #ifdef  CFG_ENV_IS_IN_FLASH
 103         /* ENV protection ON by default */
 104         flash_protect(FLAG_PROTECT_SET,
 105                       CFG_ENV_ADDR,
 106                       CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
 107                       &flash_info[0]);
 108 #endif
 109 #endif
 110         return (size);
 111 }
 112
 113 /*-----------------------------------------------------------------------
 114  */
 115 void flash_print_info  (flash_info_t *info)
 116 {
 117         int i;
 118
 119         if (info->flash_id == FLASH_UNKNOWN) {
 120                 printf ("missing or unknown FLASH type\n");
 121                 return;
 122         }
 123
 124         switch (info->flash_id & FLASH_VENDMASK) {
 125         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 126         case FLASH_MAN_SHARP:   printf ("Sharp ");              break;
 127         default:                printf ("Unknown Vendor ");     break;
 128         }
 129
 130         switch (info->flash_id & FLASH_TYPEMASK) {
 131         case FLASH_28F640C3T:   printf ("28F640C3T (64 Mbit x 2, 128 x 128k)\n");
 132                                 break;
 133         default:                printf ("Unknown Chip Type\n");
 134                                 break;
 135         }
 136
 137         printf ("  Size: %ld MB in %d Sectors\n",
 138                 info->size >> 20, info->sector_count);
 139
 140         printf ("  Sector Start Addresses:");
 141         for (i=0; i<info->sector_count; ++i) {
 142                 if ((i % 5) == 0)
 143                         printf ("\n   ");
 144                 printf (" %08lX%s",
 145                         info->start[i],
 146                         info->protect[i] ? " (RO)" : "     "
 147                 );
 148         }
 149         printf ("\n");
 150 }
 151
 152 /*
 153  * The following code cannot be run from FLASH!
 154  */
 155
 156 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 157 {
 158         short i;
 159         ulong value;
 160         ulong base = (ulong)addr;
 161         ulong sector_offset;
 162
 163 #ifdef DEBUG
 164         printf("Check flash at 0x%08x\n",(uint)addr);
 165 #endif
 166         /* Write "Intelligent Identifier" command: read Manufacturer ID */
 167         *addr = 0x90909090;
 168         udelay(20);
 169         asm("sync");
 170
 171         value = addr[0] & 0x00FF00FF;
 172
 173 #ifdef DEBUG
 174         printf("manufacturer=0x%x\n",(uint)value);
 175 #endif
 176         switch (value) {
 177         case MT_MANUFACT:       /* SHARP, MT or => Intel */
 178         case INTEL_ALT_MANU:
 179                 info->flash_id = FLASH_MAN_INTEL;
 180                 break;
 181         default:
 182                 printf("unknown manufacturer: %x\n", (unsigned int)value);
 183                 info->flash_id = FLASH_UNKNOWN;
 184                 info->sector_count = 0;
 185                 info->size = 0;
 186                 return (0);                     /* no or unknown flash  */
 187         }
 188
 189         value = addr[1];             /* device ID            */
 190
 191 #ifdef DEBUG
 192         printf("deviceID=0x%x\n",(uint)value);
 193 #endif
 194         switch (value) {
 195
 196         case (INTEL_ID_28F640C3T):
 197                 info->flash_id += FLASH_28F640C3T;
 198                 info->sector_count = 135;
 199                 info->size = 0x01000000;
 200                 sector_offset = 0x20000;
 201                 break;                          /* => 2x8 MB            */
 202
 203         default:
 204                 info->flash_id = FLASH_UNKNOWN;
 205                 return (0);                     /* => no or unknown flash */
 206
 207         }
 208
 209         /* set up sector start address table
 210          * The first 127 blocks are large, the last 8 are small.
 211          */
 212         for (i = 0; i < 127; i++) {
 213                 info->start[i] = base;
 214                 base += sector_offset;
 215                 /* Sectors are locked upon reset */
 216                 info->protect[i] = 0;
 217         }
 218         for (i = 127; i < 135; i++) {
 219                 info->start[i] = base;
 220                 base += 0x4000;
 221                 /* Sectors are locked upon reset */
 222                 info->protect[i] = 0;
 223         }
 224
 225
 226         /*
 227          * Prevent writes to uninitialized FLASH.
 228          */
 229         if (info->flash_id != FLASH_UNKNOWN) {
 230                 addr = (vu_long *)info->start[0];
 231                 *addr = 0xFFFFFF;       /* reset bank to read array mode */
 232                 asm("sync");
 233         }
 234
 235         return (info->size);
 236 }
 237
 238
 239 /*-----------------------------------------------------------------------
 240  */
 241
 242 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 243 {
 244         int flag, prot, sect;
 245         ulong start, now, last;
 246
 247         if ((s_first < 0) || (s_first > s_last)) {
 248                 if (info->flash_id == FLASH_UNKNOWN) {
 249                         printf ("- missing\n");
 250                 } else {
 251                         printf ("- no sectors to erase\n");
 252                 }
 253                 return 1;
 254         }
 255
 256         if (    ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL)
 257              && ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_SHARP) ) {
 258                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 259                         info->flash_id);
 260                 return 1;
 261         }
 262
 263         prot = 0;
 264         for (sect=s_first; sect<=s_last; ++sect) {
 265                 if (info->protect[sect]) {
 266                         prot++;
 267                 }
 268         }
 269
 270         if (prot) {
 271                 printf ("- Warning: %d protected sectors will not be erased!\n",
 272                         prot);
 273         } else {
 274                 printf ("\n");
 275         }
 276
 277 #ifdef DEBUG
 278         printf("\nFlash Erase:\n");
 279 #endif
 280         /* Make Sure Block Lock Bit is not set. */
 281         if(clear_block_lock_bit((vu_long *)(info->start[s_first]))){
 282                 return 1;
 283         }
 284
 285         /* Start erase on unprotected sectors */
 286 #if defined(DEBUG)
 287         printf("Begin to erase now,s_first=0x%x s_last=0x%x...\n",s_first,s_last);
 288 #endif
 289         for (sect = s_first; sect<=s_last; sect++) {
 290                 if (info->protect[sect] == 0) { /* not protected */
 291                         vu_long *addr = (vu_long *)(info->start[sect]);
 292                         asm("sync");
 293
 294                         last = start = get_timer (0);
 295
 296                         /* Disable interrupts which might cause a timeout here */
 297                         flag = disable_interrupts();
 298
 299                         /* Reset Array */
 300                         *addr = 0xffffffff;
 301                         asm("sync");
 302                         /* Clear Status Register */
 303                         *addr = 0x50505050;
 304                         asm("sync");
 305                         /* Single Block Erase Command */
 306                         *addr = 0x20202020;
 307                         asm("sync");
 308                         /* Confirm */
 309                         *addr = 0xD0D0D0D0;
 310                         asm("sync");
 311
 312                         if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
 313                             /* Resume Command, as per errata update */
 314                             *addr = 0xD0D0D0D0;
 315                             asm("sync");
 316                         }
 317
 318                         /* re-enable interrupts if necessary */
 319                         if (flag)
 320                                 enable_interrupts();
 321
 322                         /* wait at least 80us - let's wait 1 ms */
 323                         udelay (1000);
 324                         while ((*addr & 0x00800080) != 0x00800080) {
 325                                 if(*addr & 0x00200020){
 326                                         printf("Error in Block Erase - Lock Bit may be set!\n");
 327                                         printf("Status Register = 0x%X\n", (uint)*addr);
 328                                         *addr = 0xFFFFFFFF;     /* reset bank */
 329                                         asm("sync");
 330                                         return 1;
 331                                 }
 332                                 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 333                                         printf ("Timeout\n");
 334                                         *addr = 0xFFFFFFFF;     /* reset bank */
 335                                         asm("sync");
 336                                         return 1;
 337                                 }
 338                                 /* show that we're waiting */
 339                                 if ((now - last) > 1000) {      /* every second */
 340                                         putc ('.');
 341                                         last = now;
 342                                 }
 343                         }
 344
 345                         /* reset to read mode */
 346                         *addr = 0xFFFFFFFF;
 347                         asm("sync");
 348                 }
 349         }
 350
 351         printf ("flash erase done\n");
 352         return 0;
 353 }
 354
 355 /*-----------------------------------------------------------------------
 356  * Copy memory to flash, returns:
 357  * 0 - OK
 358  * 1 - write timeout
 359  * 2 - Flash not erased
 360  */
 361
 362 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 363 {
 364         ulong cp, wp, data;
 365         int i, l, rc;
 366
 367         wp = (addr & ~3);       /* get lower word aligned address */
 368
 369         /*
 370          * handle unaligned start bytes
 371          */
 372         if ((l = addr - wp) != 0) {
 373                 data = 0;
 374                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 375                         data = (data << 8) | (*(uchar *)cp);
 376                 }
 377                 for (; i<4 && cnt>0; ++i) {
 378                         data = (data << 8) | *src++;
 379                         --cnt;
 380                         ++cp;
 381                 }
 382                 for (; cnt==0 && i<4; ++i, ++cp) {
 383                         data = (data << 8) | (*(uchar *)cp);
 384                 }
 385
 386                 if ((rc = write_word(info, wp, data)) != 0) {
 387                         return (rc);
 388                 }
 389                 wp += 4;
 390         }
 391
 392         /*
 393          * handle word aligned part
 394          */
 395         while (cnt >= 4) {
 396                 data = 0;
 397                 for (i=0; i<4; ++i) {
 398                         data = (data << 8) | *src++;
 399                 }
 400                 if ((rc = write_word(info, wp, data)) != 0) {
 401                         return (rc);
 402                 }
 403                 wp  += 4;
 404                 cnt -= 4;
 405         }
 406
 407         if (cnt == 0) {
 408                 return (0);
 409         }
 410
 411         /*
 412          * handle unaligned tail bytes
 413          */
 414         data = 0;
 415         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 416                 data = (data << 8) | *src++;
 417                 --cnt;
 418         }
 419         for (; i<4; ++i, ++cp) {
 420                 data = (data << 8) | (*(uchar *)cp);
 421         }
 422
 423         return (write_word(info, wp, data));
 424 }
 425
 426 /*-----------------------------------------------------------------------
 427  * Write a word to Flash, returns:
 428  * 0 - OK
 429  * 1 - write timeout
 430  * 2 - Flash not erased
 431  */
 432 static int write_word (flash_info_t *info, ulong dest, ulong data)
 433 {
 434         vu_long *addr = (vu_long *)dest;
 435         ulong start, csr;
 436         int flag;
 437
 438         /* Check if Flash is (sufficiently) erased */
 439         if ((*addr & data) != data) {
 440                 return (2);
 441         }
 442         /* Disable interrupts which might cause a timeout here */
 443         flag = disable_interrupts();
 444
 445         /* Write Command */
 446         *addr = 0x10101010;
 447         asm("sync");
 448
 449         /* Write Data */
 450         *addr = data;
 451
 452         /* re-enable interrupts if necessary */
 453         if (flag)
 454                 enable_interrupts();
 455
 456         /* data polling for D7 */
 457         start = get_timer (0);
 458         flag  = 0;
 459
 460         while (((csr = *addr) & 0x00800080) != 0x00800080) {
 461                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 462                         flag = 1;
 463                         break;
 464                 }
 465         }
 466         if (csr & 0x40404040) {
 467                 printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
 468                 flag = 1;
 469         }
 470
 471         /* Clear Status Registers Command */
 472         *addr = 0x50505050;
 473         asm("sync");
 474         /* Reset to read array mode */
 475         *addr = 0xFFFFFFFF;
 476         asm("sync");
 477
 478         return (flag);
 479 }
 480
 481 /*-----------------------------------------------------------------------
 482  * Clear Block Lock Bit, returns:
 483  * 0 - OK
 484  * 1 - Timeout
 485  */
 486
 487 static int clear_block_lock_bit(vu_long  * addr)
 488 {
 489         ulong start, now;
 490
 491         /* Reset Array */
 492         *addr = 0xffffffff;
 493         asm("sync");
 494         /* Clear Status Register */
 495         *addr = 0x50505050;
 496         asm("sync");
 497
 498         *addr = 0x60606060;
 499         asm("sync");
 500         *addr = 0xd0d0d0d0;
 501         asm("sync");
 502
 503         start = get_timer (0);
 504         while((*addr & 0x00800080) != 0x00800080){
 505                 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 506                         printf ("Timeout on clearing Block Lock Bit\n");
 507                         *addr = 0xFFFFFFFF;     /* reset bank */
 508                         asm("sync");
 509                         return 1;
 510                 }
 511         }
 512         return 0;
 513 }
 514
 515 #endif /* !CFG_NO_FLASH */