board/ppmc7xx/flash.c

   1 /*
   2  * flash.c
   3  * -------
   4  *
   5  * Flash programming routines for the Wind River PPMC 74xx/7xx
   6  * based on flash.c from the TQM8260 board.
   7  *
   8  * By Richard Danter (richard.danter@windriver.com)
   9  * Copyright (C) 2005 Wind River Systems
  10  */
  11
  12 #include <common.h>
  13 #include <asm/processor.h>
  14 #include <74xx_7xx.h>
  15
  16 #define DWORD unsigned long long
  17
  18 /* Local function prototypes */
  19 static int      write_dword (flash_info_t* info, ulong dest, unsigned char *pdata);
  20 static void     write_via_fpu (volatile DWORD* addr, DWORD* data);
  21
  22 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  23
  24 /*-----------------------------------------------------------------------
  25  */
  26 void flash_reset (void)
  27 {
  28         unsigned long msr;
  29         DWORD cmd_reset = 0x00F000F000F000F0LL;
  30
  31         if (flash_info[0].flash_id != FLASH_UNKNOWN) {
  32                 msr = get_msr ();
  33                 set_msr (msr | MSR_FP);
  34
  35                 write_via_fpu ((DWORD*)flash_info[0].start[0], &cmd_reset );
  36
  37                 set_msr (msr);
  38         }
  39 }
  40
  41 /*-----------------------------------------------------------------------
  42  */
  43 ulong flash_get_size (ulong baseaddr, flash_info_t * info)
  44 {
  45         int i;
  46         unsigned long msr;
  47         DWORD flashtest;
  48         DWORD cmd_select[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
  49                                                         0x0090009000900090LL };
  50
  51         /* Enable FPU */
  52         msr = get_msr ();
  53         set_msr (msr | MSR_FP);
  54
  55         /* Write auto-select command sequence */
  56         write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[0] );
  57         write_via_fpu ((DWORD*)(baseaddr + (0x02AA << 3)), &cmd_select[1] );
  58         write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[2] );
  59
  60         /* Restore FPU */
  61         set_msr (msr);
  62
  63         /* Read manufacturer ID */
  64         flashtest = *(volatile DWORD*)baseaddr;
  65         switch ((int)flashtest) {
  66         case AMD_MANUFACT:
  67                 info->flash_id = FLASH_MAN_AMD;
  68                 break;
  69         case FUJ_MANUFACT:
  70                 info->flash_id = FLASH_MAN_FUJ;
  71                 break;
  72         default:
  73                 /* No, faulty or unknown flash */
  74                 info->flash_id = FLASH_UNKNOWN;
  75                 info->sector_count = 0;
  76                 info->size = 0;
  77                 return (0);
  78         }
  79
  80         /* Read device ID */
  81         flashtest = *(volatile DWORD*)(baseaddr + 8);
  82         switch ((long)flashtest) {
  83         case AMD_ID_LV800T:
  84                 info->flash_id += FLASH_AM800T;
  85                 info->sector_count = 19;
  86                 info->size = 0x00400000;
  87                 break;
  88         case AMD_ID_LV800B:
  89                 info->flash_id += FLASH_AM800B;
  90                 info->sector_count = 19;
  91                 info->size = 0x00400000;
  92                 break;
  93         case AMD_ID_LV160T:
  94                 info->flash_id += FLASH_AM160T;
  95                 info->sector_count = 35;
  96                 info->size = 0x00800000;
  97                 break;
  98         case AMD_ID_LV160B:
  99                 info->flash_id += FLASH_AM160B;
 100                 info->sector_count = 35;
 101                 info->size = 0x00800000;
 102                 break;
 103         case AMD_ID_DL322T:
 104                 info->flash_id += FLASH_AMDL322T;
 105                 info->sector_count = 71;
 106                 info->size = 0x01000000;
 107                 break;
 108         case AMD_ID_DL322B:
 109                 info->flash_id += FLASH_AMDL322B;
 110                 info->sector_count = 71;
 111                 info->size = 0x01000000;
 112                 break;
 113         case AMD_ID_DL323T:
 114                 info->flash_id += FLASH_AMDL323T;
 115                 info->sector_count = 71;
 116                 info->size = 0x01000000;
 117                 break;
 118         case AMD_ID_DL323B:
 119                 info->flash_id += FLASH_AMDL323B;
 120                 info->sector_count = 71;
 121                 info->size = 0x01000000;
 122                 break;
 123         case AMD_ID_LV640U:
 124                 info->flash_id += FLASH_AM640U;
 125                 info->sector_count = 128;
 126                 info->size = 0x02000000;
 127                 break;
 128         default:
 129                 /* Unknown flash type */
 130                 info->flash_id = FLASH_UNKNOWN;
 131                 return (0);
 132         }
 133
 134         if ((long)flashtest == AMD_ID_LV640U) {
 135                 /* set up sector start adress table (uniform sector type) */
 136                 for (i = 0; i < info->sector_count; i++)
 137                         info->start[i] = baseaddr + (i * 0x00040000);
 138         } else if (info->flash_id & FLASH_BTYPE) {
 139                 /* set up sector start adress table (bottom sector type) */
 140                 info->start[0] = baseaddr + 0x00000000;
 141                 info->start[1] = baseaddr + 0x00010000;
 142                 info->start[2] = baseaddr + 0x00018000;
 143                 info->start[3] = baseaddr + 0x00020000;
 144                 for (i = 4; i < info->sector_count; i++) {
 145                         info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
 146                 }
 147         } else {
 148                 /* set up sector start adress table (top sector type) */
 149                 i = info->sector_count - 1;
 150                 info->start[i--] = baseaddr + info->size - 0x00010000;
 151                 info->start[i--] = baseaddr + info->size - 0x00018000;
 152                 info->start[i--] = baseaddr + info->size - 0x00020000;
 153                 for (; i >= 0; i--) {
 154                         info->start[i] = baseaddr + i * 0x00040000;
 155                 }
 156         }
 157
 158         /* check for protected sectors */
 159         for (i = 0; i < info->sector_count; i++) {
 160                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 161                 if (*(volatile DWORD*)(info->start[i] + 16) & 0x0001000100010001LL) {
 162                         info->protect[i] = 1;   /* D0 = 1 if protected */
 163                 } else {
 164                         info->protect[i] = 0;
 165                 }
 166         }
 167
 168         flash_reset ();
 169         return (info->size);
 170 }
 171
 172 /*-----------------------------------------------------------------------
 173  */
 174 unsigned long flash_init (void)
 175 {
 176         unsigned long size_b0 = 0;
 177         int i;
 178
 179         /* Init: no FLASHes known */
 180         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 181                 flash_info[i].flash_id = FLASH_UNKNOWN;
 182         }
 183
 184         /* Static FLASH Bank configuration here (only one bank) */
 185         size_b0 = flash_get_size (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 186         if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
 187                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 188                                 size_b0, size_b0 >> 20);
 189         }
 190
 191         /*
 192          * protect monitor and environment sectors
 193          */
 194 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 195         flash_protect (FLAG_PROTECT_SET,
 196                        CONFIG_SYS_MONITOR_BASE,
 197                        CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
 198 #endif
 199
 200 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 201 # ifndef  CONFIG_ENV_SIZE
 202 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
 203 # endif
 204         flash_protect (FLAG_PROTECT_SET,
 205                        CONFIG_ENV_ADDR,
 206                        CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
 207 #endif
 208
 209         return (size_b0);
 210 }
 211
 212 /*-----------------------------------------------------------------------
 213  */
 214 void flash_print_info (flash_info_t * info)
 215 {
 216         int i;
 217
 218         if (info->flash_id == FLASH_UNKNOWN) {
 219                 printf ("missing or unknown FLASH type\n");
 220                 return;
 221         }
 222
 223         switch (info->flash_id & FLASH_VENDMASK) {
 224         case FLASH_MAN_AMD:
 225                 printf ("AMD ");
 226                 break;
 227         case FLASH_MAN_FUJ:
 228                 printf ("FUJITSU ");
 229                 break;
 230         default:
 231                 printf ("Unknown Vendor ");
 232                 break;
 233         }
 234
 235         switch (info->flash_id & FLASH_TYPEMASK) {
 236         case FLASH_AM800T:
 237                 printf ("29LV800T (8 M, top sector)\n");
 238                 break;
 239         case FLASH_AM800B:
 240                 printf ("29LV800T (8 M, bottom sector)\n");
 241                 break;
 242         case FLASH_AM160T:
 243                 printf ("29LV160T (16 M, top sector)\n");
 244                 break;
 245         case FLASH_AM160B:
 246                 printf ("29LV160B (16 M, bottom sector)\n");
 247                 break;
 248         case FLASH_AMDL322T:
 249                 printf ("29DL322T (32 M, top sector)\n");
 250                 break;
 251         case FLASH_AMDL322B:
 252                 printf ("29DL322B (32 M, bottom sector)\n");
 253                 break;
 254         case FLASH_AMDL323T:
 255                 printf ("29DL323T (32 M, top sector)\n");
 256                 break;
 257         case FLASH_AMDL323B:
 258                 printf ("29DL323B (32 M, bottom sector)\n");
 259                 break;
 260         case FLASH_AM640U:
 261                 printf ("29LV640D (64 M, uniform sector)\n");
 262                 break;
 263         default:
 264                 printf ("Unknown Chip Type\n");
 265                 break;
 266         }
 267
 268         printf ("  Size: %ld MB in %d Sectors\n",
 269                         info->size >> 20, info->sector_count);
 270
 271         printf ("  Sector Start Addresses:");
 272         for (i = 0; i < info->sector_count; ++i) {
 273                 if ((i % 5) == 0)
 274                         printf ("\n   ");
 275                 printf (" %08lX%s",
 276                         info->start[i],
 277                         info->protect[i] ? " (RO)" : "     "
 278                 );
 279         }
 280         printf ("\n");
 281         return;
 282 }
 283
 284 /*-----------------------------------------------------------------------
 285  */
 286 int flash_erase (flash_info_t * info, int s_first, int s_last)
 287 {
 288         int flag, prot, sect, l_sect;
 289         ulong start, now, last;
 290         unsigned long msr;
 291         DWORD cmd_erase[6] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
 292                                                    0x0080008000800080LL, 0x00AA00AA00AA00AALL,
 293                                                    0x0055005500550055LL, 0x0030003000300030LL };
 294
 295         if ((s_first < 0) || (s_first > s_last)) {
 296                 if (info->flash_id == FLASH_UNKNOWN) {
 297                         printf ("- missing\n");
 298                 } else {
 299                         printf ("- no sectors to erase\n");
 300                 }
 301                 return 1;
 302         }
 303
 304         prot = 0;
 305         for (sect = s_first; sect <= s_last; sect++) {
 306                 if (info->protect[sect])
 307                         prot++;
 308         }
 309
 310         if (prot) {
 311                 printf ("- Warning: %d protected sectors will not be erased!\n",
 312                         prot);
 313         } else {
 314                 printf ("\n");
 315         }
 316
 317         l_sect = -1;
 318
 319         /* Enable FPU */
 320         msr = get_msr();
 321         set_msr ( msr | MSR_FP );
 322
 323         /* Disable interrupts which might cause a timeout here */
 324         flag = disable_interrupts ();
 325
 326         write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[0] );
 327         write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[1] );
 328         write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[2] );
 329         write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[3] );
 330         write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[4] );
 331         udelay (1000);
 332
 333         /* Start erase on unprotected sectors */
 334         for (sect = s_first; sect <= s_last; sect++) {
 335                 if (info->protect[sect] == 0) { /* not protected */
 336                         write_via_fpu ((DWORD*)info->start[sect], &cmd_erase[5] );
 337                         l_sect = sect;
 338                 }
 339         }
 340
 341         /* re-enable interrupts if necessary */
 342         if (flag)
 343                 enable_interrupts ();
 344
 345         /* Restore FPU */
 346         set_msr (msr);
 347
 348         /* wait at least 80us - let's wait 1 ms */
 349         udelay (1000);
 350
 351         /*
 352          * We wait for the last triggered sector
 353          */
 354         if (l_sect < 0)
 355                 goto DONE;
 356
 357         start = get_timer (0);
 358         last = start;
 359         while ((*(volatile DWORD*)info->start[l_sect] & 0x0080008000800080LL )
 360                                 != 0x0080008000800080LL )
 361         {
 362                 if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 363                         printf ("Timeout\n");
 364                         return 1;
 365                 }
 366                 /* show that we're waiting */
 367                 if ((now - last) > 1000) {      /* every second */
 368                         serial_putc ('.');
 369                         last = now;
 370                 }
 371         }
 372
 373   DONE:
 374         /* reset to read mode */
 375         flash_reset ();
 376
 377         printf (" done\n");
 378         return 0;
 379 }
 380
 381
 382 /*-----------------------------------------------------------------------
 383  * Copy memory to flash, returns:
 384  * 0 - OK
 385  * 1 - write timeout
 386  * 2 - Flash not erased
 387  */
 388
 389 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 390 {
 391         ulong dp;
 392         static unsigned char bb[8];
 393         int i, l, rc, cc = cnt;
 394
 395         dp = (addr & ~7);               /* get lower dword aligned address */
 396
 397         /*
 398          * handle unaligned start bytes
 399          */
 400         if ((l = addr - dp) != 0) {
 401                 for (i = 0; i < 8; i++)
 402                         bb[i] = (i < l || (i - l) >= cc) ? *(char*)(dp + i) : *src++;
 403                 if ((rc = write_dword (info, dp, bb)) != 0) {
 404                         return (rc);
 405                 }
 406                 dp += 8;
 407                 cc -= 8 - l;
 408         }
 409
 410         /*
 411          * handle word aligned part
 412          */
 413         while (cc >= 8) {
 414                 if ((rc = write_dword (info, dp, src)) != 0) {
 415                         return (rc);
 416                 }
 417                 dp += 8;
 418                 src += 8;
 419                 cc -= 8;
 420         }
 421
 422         if (cc <= 0) {
 423                 return (0);
 424         }
 425
 426         /*
 427          * handle unaligned tail bytes
 428          */
 429         for (i = 0; i < 8; i++) {
 430                 bb[i] = (i < cc) ? *src++ : *(char*)(dp + i);
 431         }
 432         return (write_dword (info, dp, bb));
 433 }
 434
 435 /*-----------------------------------------------------------------------
 436  * Write a dword to Flash, returns:
 437  * 0 - OK
 438  * 1 - write timeout
 439  * 2 - Flash not erased
 440  */
 441 static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
 442 {
 443         ulong start;
 444         unsigned long msr;
 445         int flag, i;
 446         DWORD data;
 447         DWORD cmd_write[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
 448                                                    0x00A000A000A000A0LL };
 449
 450         for (data = 0, i = 0; i < 8; i++)
 451                 data = (data << 8) + *pdata++;
 452
 453         /* Check if Flash is (sufficiently) erased */
 454         if ((*(DWORD*)dest & data) != data) {
 455                 return (2);
 456         }
 457
 458         /* Enable FPU */
 459         msr = get_msr();
 460         set_msr( msr | MSR_FP );
 461
 462         /* Disable interrupts which might cause a timeout here */
 463         flag = disable_interrupts ();
 464
 465         write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[0] );
 466         write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_write[1] );
 467         write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[2] );
 468         write_via_fpu ((DWORD*)dest, &data );
 469
 470         /* re-enable interrupts if necessary */
 471         if (flag)
 472                 enable_interrupts ();
 473
 474         /* Restore FPU */
 475         set_msr(msr);
 476
 477         /* data polling for D7 */
 478         start = get_timer (0);
 479         while (*(volatile DWORD*)dest != data ) {
 480                 if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 481                         return (1);
 482                 }
 483         }
 484         return (0);
 485 }
 486
 487 /*-----------------------------------------------------------------------
 488  */
 489 static void write_via_fpu (volatile DWORD* addr, DWORD* data)
 490 {
 491         __asm__ __volatile__ ("lfd  1, 0(%0)"::"r" (data));
 492         __asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
 493         __asm__ __volatile__ ("eieio");
 494 }