board/mpl/common/flash.c

   1 /*
   2  * (C) Copyright 2000, 2001
   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  * Modified 4/5/2001
  26  * Wait for completion of each sector erase command issued
  27  * 4/5/2001
  28  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  29  */
  30
  31 /*
  32  * Modified 3/7/2001
  33  * - adapted for pip405, Denis Peter, MPL AG Switzerland
  34  * TODO:
  35  * clean-up
  36  */
  37
  38 #include <common.h>
  39 #include <ppc4xx.h>
  40 #include <asm/processor.h>
  41 #include "common_util.h"
  42 #if defined(CONFIG_MIP405)
  43 #include "../mip405/mip405.h"
  44 #endif
  45 #if defined(CONFIG_PIP405)
  46 #include "../pip405/pip405.h"
  47 #endif
  48 #include <405gp_pci.h>
  49
  50 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  51 /*-----------------------------------------------------------------------
  52  * Functions
  53  */
  54 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  55 static int write_word (flash_info_t *info, ulong dest, ulong data);
  56
  57 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt);
  58
  59
  60 #ifdef CONFIG_PIP405
  61 #define ADDR0           0x5555
  62 #define ADDR1           0x2aaa
  63 #define FLASH_WORD_SIZE unsigned short
  64 #endif
  65
  66 #ifdef CONFIG_MIP405
  67 #define ADDR0           0x5555
  68 #define ADDR1           0x2aaa
  69 #define FLASH_WORD_SIZE unsigned short
  70 #endif
  71
  72 #define FALSE           0
  73 #define TRUE            1
  74
  75 /*-----------------------------------------------------------------------
  76  * Some CS switching routines:
  77  *
  78  * On PIP/MIP405 we have 3 (4) possible boot mode
  79  *
  80  * - Boot from Flash (Flash CS = CS0, MPS CS = CS1)
  81  * - Boot from MPS   (Flash CS = CS1, MPS CS = CS0)
  82  * - Boot from PCI with Flash map (Flash CS = CS0, MPS CS = CS1)
  83  * - Boot from PCI with MPS map   (Flash CS = CS1, MPS CS = CS0)
  84  * The flash init is the first board specific routine which is called
  85  * after code relocation (running from SDRAM)
  86  * The first thing we do is to map the Flash CS to the Flash area and
  87  * the MPS CS to the MPS area. Since the flash size is unknown at this
  88  * point, we use the max flash size and the lowest flash address as base.
  89  *
  90  * After flash detection we adjust the size of the CS area accordingly.
  91  * The board_init_r will fill in wrong values in the board init structure,
  92  * but this will be fixed in the misc_init_r routine:
  93  * bd->bi_flashstart=0-flash_info[0].size
  94  * bd->bi_flashsize=flash_info[0].size-CFG_MONITOR_LEN
  95  * bd->bi_flashoffset=0
  96  *
  97  */
  98 int get_boot_mode(void)
  99 {
 100         unsigned long pbcr;
 101         int res = 0;
 102         pbcr = mfdcr (strap);
 103         if ((pbcr & PSR_ROM_WIDTH_MASK) == 0)
 104                 /* boot via MPS or MPS mapping */
 105                 res = BOOT_MPS;
 106         if(pbcr & PSR_ROM_LOC)
 107                 /* boot via PCI.. */
 108                 res |= BOOT_PCI;
 109          return res;
 110 }
 111
 112 /* Map the flash high (in boot area)
 113    This code can only be executed from SDRAM (after relocation).
 114 */
 115 void setup_cs_reloc(void)
 116 {
 117         int mode;
 118         /* Since we are relocated, we can set-up the CS finaly
 119          * but first of all, switch off PCI mapping (in case it was a PCI boot) */
 120         out32r(PMM0MA,0L);
 121         icache_enable (); /* we are relocated */
 122         /* get boot mode */
 123         mode=get_boot_mode();
 124         /* we map the flash high in every case */
 125         /* first findout on which cs the flash is */
 126         if(mode & BOOT_MPS) {
 127                 /* map flash high on CS1 and MPS on CS0 */
 128                 mtdcr (ebccfga, pb0ap);
 129                 mtdcr (ebccfgd, MPS_AP);
 130                 mtdcr (ebccfga, pb0cr);
 131                 mtdcr (ebccfgd, MPS_CR);
 132                 /* we use the default values (max values) for the flash
 133                  * because its real size is not yet known */
 134                 mtdcr (ebccfga, pb1ap);
 135                 mtdcr (ebccfgd, FLASH_AP);
 136                 mtdcr (ebccfga, pb1cr);
 137                 mtdcr (ebccfgd, FLASH_CR_B);
 138         }
 139         else {
 140                 /* map flash high on CS0 and MPS on CS1 */
 141                 mtdcr (ebccfga, pb1ap);
 142                 mtdcr (ebccfgd, MPS_AP);
 143                 mtdcr (ebccfga, pb1cr);
 144                 mtdcr (ebccfgd, MPS_CR);
 145                 /* we use the default values (max values) for the flash
 146                  * because its real size is not yet known */
 147                 mtdcr (ebccfga, pb0ap);
 148                 mtdcr (ebccfgd, FLASH_AP);
 149                 mtdcr (ebccfga, pb0cr);
 150                 mtdcr (ebccfgd, FLASH_CR_B);
 151         }
 152 }
 153
 154
 155
 156 unsigned long flash_init (void)
 157 {
 158         unsigned long size_b0, size_b1,flashcr;
 159         int mode, i;
 160         extern char version_string;
 161         char *p=&version_string;
 162
 163         /* Since we are relocated, we can set-up the CS finally */
 164         setup_cs_reloc();
 165         /* get and display boot mode */
 166         mode=get_boot_mode();
 167         if(mode & BOOT_PCI)
 168                 printf("(PCI Boot %s Map) ",(mode & BOOT_MPS) ?
 169                         "MPS" : "Flash");
 170         else
 171                 printf("(%s Boot) ",(mode & BOOT_MPS) ?
 172                         "MPS" : "Flash");
 173         /* Init: no FLASHes known */
 174         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 175                 flash_info[i].flash_id = FLASH_UNKNOWN;
 176         }
 177
 178         /* Static FLASH Bank configuration here - FIXME XXX */
 179
 180         size_b0 = flash_get_size((vu_long *)CFG_MONITOR_BASE, &flash_info[0]);
 181
 182         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 183                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 184                         size_b0, size_b0<<20);
 185         }
 186         /* protect the bootloader */
 187         /* Monitor protection ON by default */
 188 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 189         flash_protect(FLAG_PROTECT_SET,
 190                         CFG_MONITOR_BASE,
 191                         CFG_MONITOR_BASE+monitor_flash_len-1,
 192                         &flash_info[0]);
 193 #endif
 194         /* protect reset vector */
 195         flash_info[0].protect[flash_info[0].sector_count-1] = 1;
 196         size_b1 = 0 ;
 197         flash_info[0].size = size_b0;
 198         /* set up flash cs according to the size */
 199         if(mode & BOOT_MPS) {
 200                 /* flash is on CS1 */
 201                 mtdcr(ebccfga, pb1cr);
 202                 flashcr = mfdcr (ebccfgd);
 203                 /* we map the flash high in every case */
 204                 flashcr&=0x0001FFFF; /* mask out address bits */
 205                 flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
 206                 flashcr|= (((flash_info[0].size >>21) & 0x07) << 17); /* size addr */
 207                 mtdcr(ebccfga, pb1cr);
 208                 mtdcr(ebccfgd, flashcr);
 209         }
 210         else {
 211                 /* flash is on CS0 */
 212                 mtdcr(ebccfga, pb0cr);
 213                 flashcr = mfdcr (ebccfgd);
 214                 /* we map the flash high in every case */
 215                 flashcr&=0x0001FFFF; /* mask out address bits */
 216                 flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
 217                 flashcr|= (((flash_info[0].size >>21) & 0x07) << 17); /* size addr */
 218                 mtdcr(ebccfga, pb0cr);
 219                 mtdcr(ebccfgd, flashcr);
 220         }
 221 #if 0
 222         /* enable this if you want to test if
 223            the relocation has be done ok.
 224            This will disable both Chipselects */
 225         mtdcr (ebccfga, pb0cr);
 226         mtdcr (ebccfgd, 0L);
 227         mtdcr (ebccfga, pb1cr);
 228         mtdcr (ebccfgd, 0L);
 229         printf("CS0 & CS1 switched off for test\n");
 230 #endif
 231         /* patch version_string */
 232         for(i=0;i<0x100;i++) {
 233                 if(*p=='\n') {
 234                         *p=0;
 235                         break;
 236                 }
 237                 p++;
 238         }
 239         return (size_b0);
 240 }
 241
 242
 243 /*-----------------------------------------------------------------------
 244  */
 245 void flash_print_info  (flash_info_t *info)
 246 {
 247         int i;
 248         int k;
 249         int size;
 250         int erased;
 251         volatile unsigned long *flash;
 252
 253         if (info->flash_id == FLASH_UNKNOWN) {
 254                 printf ("missing or unknown FLASH type\n");
 255                 return;
 256         }
 257
 258         switch (info->flash_id & FLASH_VENDMASK) {
 259         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 260         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 261         case FLASH_MAN_SST:     printf ("SST ");                break;
 262         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 263         default:                printf ("Unknown Vendor ");     break;
 264         }
 265
 266         switch (info->flash_id & FLASH_TYPEMASK) {
 267         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 268                                 break;
 269         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 270                                 break;
 271         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 272                                 break;
 273         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 274                                 break;
 275         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 276                                 break;
 277         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 278                                 break;
 279         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 280                                 break;
 281         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 282                                 break;
 283         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 284                                 break;
 285         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 286                                 break;
 287         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 288                                 break;
 289         case FLASH_INTEL320T:   printf ("TE28F320C3 (32 Mbit, top sector size)\n");
 290                                 break;
 291         case FLASH_AM640U:      printf ("AM29LV640U (64 Mbit, uniform sector size)\n");
 292                                 break;
 293         default:                printf ("Unknown Chip Type\n");
 294                                 break;
 295         }
 296
 297         printf ("  Size: %ld KB in %d Sectors\n",
 298                 info->size >> 10, info->sector_count);
 299
 300         printf ("  Sector Start Addresses:");
 301         for (i=0; i<info->sector_count; ++i) {
 302                 /*
 303                  * Check if whole sector is erased
 304                 */
 305                 if (i != (info->sector_count-1))
 306                         size = info->start[i+1] - info->start[i];
 307                 else
 308                         size = info->start[0] + info->size - info->start[i];
 309                 erased = 1;
 310                 flash = (volatile unsigned long *)info->start[i];
 311                 size = size >> 2;        /* divide by 4 for longword access */
 312                 for (k=0; k<size; k++) {
 313                         if (*flash++ != 0xffffffff) {
 314                                 erased = 0;
 315                                 break;
 316                         }
 317                 }
 318                 if ((i % 5) == 0)
 319                         printf ("\n   ");
 320                 printf (" %08lX%s%s",
 321                         info->start[i],
 322                         erased ? " E" : "  ",
 323                         info->protect[i] ? "RO " : "   ");
 324         }
 325         printf ("\n");
 326 }
 327
 328 /*-----------------------------------------------------------------------
 329  */
 330
 331
 332 /*-----------------------------------------------------------------------
 333
 334 */
 335
 336 /*
 337  * The following code cannot be run from FLASH!
 338  */
 339 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 340 {
 341         short i;
 342         FLASH_WORD_SIZE value;
 343         ulong base;
 344         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 345
 346         /* Write auto select command: read Manufacturer ID */
 347         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 348         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 349         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 350
 351         value = addr2[0];
 352         /*      printf("flash_get_size value: %x\n",value); */
 353         switch (value) {
 354         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 355                 info->flash_id = FLASH_MAN_AMD;
 356                 break;
 357         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 358                 info->flash_id = FLASH_MAN_FUJ;
 359                 break;
 360         case (FLASH_WORD_SIZE)INTEL_MANUFACT:
 361                 info->flash_id = FLASH_MAN_INTEL;
 362                 break;
 363         case (FLASH_WORD_SIZE)SST_MANUFACT:
 364                 info->flash_id = FLASH_MAN_SST;
 365                 break;
 366         default:
 367                 info->flash_id = FLASH_UNKNOWN;
 368                 info->sector_count = 0;
 369                 info->size = 0;
 370                 return (0);                     /* no or unknown flash  */
 371         }
 372         value = addr2[1];                       /* device ID            */
 373         /*      printf("Device value %x\n",value);                  */
 374         switch (value) {
 375         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 376                 info->flash_id += FLASH_AM040;
 377                 info->sector_count = 8;
 378                 info->size = 0x0080000; /* => 512 ko */
 379                 break;
 380         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 381                 info->flash_id += FLASH_AM400T;
 382                 info->sector_count = 11;
 383                 info->size = 0x00080000;
 384                 break;                          /* => 0.5 MB            */
 385
 386         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 387                 info->flash_id += FLASH_AM400B;
 388                 info->sector_count = 11;
 389                 info->size = 0x00080000;
 390                 break;                          /* => 0.5 MB            */
 391
 392         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 393                 info->flash_id += FLASH_AM800T;
 394                 info->sector_count = 19;
 395                 info->size = 0x00100000;
 396                 break;                          /* => 1 MB              */
 397
 398         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 399                 info->flash_id += FLASH_AM800B;
 400                 info->sector_count = 19;
 401                 info->size = 0x00100000;
 402                 break;                          /* => 1 MB              */
 403
 404         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 405                 info->flash_id += FLASH_AM160T;
 406                 info->sector_count = 35;
 407                 info->size = 0x00200000;
 408                 break;                          /* => 2 MB              */
 409
 410         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 411                 info->flash_id += FLASH_AM160B;
 412                 info->sector_count = 35;
 413                 info->size = 0x00200000;
 414                 break;                          /* => 2 MB              */
 415         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 416                 info->flash_id += FLASH_AM320T;
 417                 info->sector_count = 67;
 418                 info->size = 0x00400000;
 419                 break;                          /* => 4 MB              */
 420         case (FLASH_WORD_SIZE)AMD_ID_LV640U:
 421                 info->flash_id += FLASH_AM640U;
 422                 info->sector_count = 128;
 423                 info->size = 0x00800000;
 424                 break;                          /* => 8 MB              */
 425 #if 0   /* enable when device IDs are available */
 426
 427         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 428                 info->flash_id += FLASH_AM320B;
 429                 info->sector_count = 67;
 430                 info->size = 0x00400000;
 431                 break;                          /* => 4 MB              */
 432 #endif
 433         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 434                 info->flash_id += FLASH_SST800A;
 435                 info->sector_count = 16;
 436                 info->size = 0x00100000;
 437                 break;                          /* => 1 MB              */
 438         case (FLASH_WORD_SIZE)INTEL_ID_28F320C3T:
 439                 info->flash_id += FLASH_INTEL320T;
 440                 info->sector_count = 71;
 441                 info->size = 0x00400000;
 442                 break;                          /* => 4 MB              */
 443
 444
 445         case (FLASH_WORD_SIZE)SST_ID_xF160A:
 446                 info->flash_id += FLASH_SST160A;
 447                 info->sector_count = 32;
 448                 info->size = 0x00200000;
 449                 break;                          /* => 2 MB              */
 450
 451         default:
 452                 info->flash_id = FLASH_UNKNOWN;
 453                 return (0);                     /* => no or unknown flash */
 454
 455         }
 456         /* base address calculation */
 457         base=0-info->size;
 458         /* set up sector start address table */
 459         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 460              (info->flash_id  == FLASH_AM040) ||
 461              (info->flash_id  == FLASH_AM640U)){
 462                 for (i = 0; i < info->sector_count; i++)
 463                         info->start[i] = base + (i * 0x00010000);
 464         }
 465         else {
 466                 if (info->flash_id & FLASH_BTYPE) {
 467                         /* set sector offsets for bottom boot block type        */
 468                         info->start[0] = base + 0x00000000;
 469                         info->start[1] = base + 0x00004000;
 470                         info->start[2] = base + 0x00006000;
 471                         info->start[3] = base + 0x00008000;
 472                         for (i = 4; i < info->sector_count; i++)
 473                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 474                 }
 475                 else {
 476                         /* set sector offsets for top boot block type           */
 477                         i = info->sector_count - 1;
 478                         if(info->sector_count==71) {
 479
 480                                 info->start[i--] = base + info->size - 0x00002000;
 481                                 info->start[i--] = base + info->size - 0x00004000;
 482                                 info->start[i--] = base + info->size - 0x00006000;
 483                                 info->start[i--] = base + info->size - 0x00008000;
 484                                 info->start[i--] = base + info->size - 0x0000A000;
 485                                 info->start[i--] = base + info->size - 0x0000C000;
 486                                 info->start[i--] = base + info->size - 0x0000E000;
 487                                 for (; i >= 0; i--)
 488                                         info->start[i] = base + i * 0x000010000;
 489                         }
 490                         else {
 491                                 info->start[i--] = base + info->size - 0x00004000;
 492                                 info->start[i--] = base + info->size - 0x00006000;
 493                                 info->start[i--] = base + info->size - 0x00008000;
 494                                 for (; i >= 0; i--)
 495                                         info->start[i] = base + i * 0x00010000;
 496                         }
 497                 }
 498         }
 499
 500         /* check for protected sectors */
 501         for (i = 0; i < info->sector_count; i++) {
 502                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 503                 /* D0 = 1 if protected */
 504                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 505                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
 506                         info->protect[i] = 0;
 507                 else
 508                         info->protect[i] = addr2[2] & 1;
 509         }
 510
 511         /*
 512          * Prevent writes to uninitialized FLASH.
 513          */
 514         if (info->flash_id != FLASH_UNKNOWN) {
 515                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 516                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 517         }
 518         return (info->size);
 519 }
 520
 521
 522 int wait_for_DQ7(flash_info_t *info, int sect)
 523 {
 524         ulong start, now, last;
 525         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 526
 527         start = get_timer (0);
 528         last  = start;
 529         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 530                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 531                         printf ("Timeout\n");
 532                         return -1;
 533                 }
 534                 /* show that we're waiting */
 535                 if ((now - last) > 1000) {  /* every second */
 536                         putc ('.');
 537                         last = now;
 538                 }
 539         }
 540         return 0;
 541 }
 542
 543 int intel_wait_for_DQ7(flash_info_t *info, int sect)
 544 {
 545         ulong start, now, last;
 546         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 547
 548         start = get_timer (0);
 549         last  = start;
 550         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 551                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 552                         printf ("Timeout\n");
 553                         return -1;
 554                 }
 555                 /* show that we're waiting */
 556                 if ((now - last) > 1000) {  /* every second */
 557                         putc ('.');
 558                         last = now;
 559                 }
 560         }
 561         addr[0]=(FLASH_WORD_SIZE)0x00500050;
 562         return 0;
 563 }
 564
 565 /*-----------------------------------------------------------------------
 566  */
 567
 568 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 569 {
 570         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 571         volatile FLASH_WORD_SIZE *addr2;
 572         int flag, prot, sect, l_sect;
 573         int i;
 574
 575
 576         if ((s_first < 0) || (s_first > s_last)) {
 577                 if (info->flash_id == FLASH_UNKNOWN) {
 578                         printf ("- missing\n");
 579                 } else {
 580                         printf ("- no sectors to erase\n");
 581                 }
 582                 return 1;
 583         }
 584
 585         if (info->flash_id == FLASH_UNKNOWN) {
 586                 printf ("Can't erase unknown flash type - aborted\n");
 587                 return 1;
 588         }
 589
 590         prot = 0;
 591         for (sect=s_first; sect<=s_last; ++sect) {
 592                 if (info->protect[sect]) {
 593                         prot++;
 594                 }
 595         }
 596
 597         if (prot) {
 598                 printf ("- Warning: %d protected sectors will not be erased!\n",
 599                         prot);
 600         } else {
 601                 printf ("\n");
 602         }
 603
 604         l_sect = -1;
 605
 606         /* Disable interrupts which might cause a timeout here */
 607         flag = disable_interrupts();
 608
 609         /* Start erase on unprotected sectors */
 610         for (sect = s_first; sect<=s_last; sect++) {
 611                 if (info->protect[sect] == 0) { /* not protected */
 612                         addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 613                         /*  printf("Erasing sector %p\n", addr2); */ /* CLH */
 614                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 615                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 616                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 617                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 618                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 619                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 620                                 addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
 621                                 for (i=0; i<50; i++)
 622                                         udelay(1000);  /* wait 1 ms */
 623                                 wait_for_DQ7(info, sect);
 624                         }
 625                         else {
 626                                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 627                                         addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector */
 628                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 629                                         intel_wait_for_DQ7(info, sect);
 630                                         addr2[0] = (FLASH_WORD_SIZE)0x00200020;  /* sector erase */
 631                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 632                                         intel_wait_for_DQ7(info, sect);
 633                                 }
 634                                 else {
 635                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 636                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 637                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 638                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 639                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 640                                         addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 641                                         wait_for_DQ7(info, sect);
 642                                 }
 643                         }
 644                         l_sect = sect;
 645                         /*
 646                          * Wait for each sector to complete, it's more
 647                          * reliable.  According to AMD Spec, you must
 648                          * issue all erase commands within a specified
 649                          * timeout.  This has been seen to fail, especially
 650                          * if printf()s are included (for debug)!!
 651                          */
 652                         /*   wait_for_DQ7(info, sect); */
 653                 }
 654         }
 655
 656         /* re-enable interrupts if necessary */
 657         if (flag)
 658                 enable_interrupts();
 659
 660         /* wait at least 80us - let's wait 1 ms */
 661         udelay (1000);
 662
 663 #if 0
 664         /*
 665          * We wait for the last triggered sector
 666          */
 667         if (l_sect < 0)
 668                 goto DONE;
 669         wait_for_DQ7(info, l_sect);
 670
 671 DONE:
 672 #endif
 673         /* reset to read mode */
 674         addr = (FLASH_WORD_SIZE *)info->start[0];
 675         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */
 676
 677         printf (" done\n");
 678         return 0;
 679 }
 680
 681
 682 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt)
 683 {
 684         int i;
 685         volatile FLASH_WORD_SIZE *addr2;
 686         long c;
 687         c= (long)cnt;
 688         for(i=info->sector_count-1;i>0;i--)
 689         {
 690                 if(addr>=info->start[i])
 691                         break;
 692         }
 693         do {
 694                 addr2 = (FLASH_WORD_SIZE *)(info->start[i]);
 695                 addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector setup */
 696                 addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* unlock sector */
 697                 intel_wait_for_DQ7(info, i);
 698                 i++;
 699                 c-=(info->start[i]-info->start[i-1]);
 700         }while(c>0);
 701 }
 702
 703
 704 /*-----------------------------------------------------------------------
 705  * Copy memory to flash, returns:
 706  * 0 - OK
 707  * 1 - write timeout
 708  * 2 - Flash not erased
 709  */
 710
 711 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 712 {
 713         ulong cp, wp, data;
 714         int i, l, rc;
 715
 716         if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 717                 unlock_intel_sectors(info,addr,cnt);
 718         }
 719         wp = (addr & ~3);       /* get lower word aligned address */
 720         /*
 721          * handle unaligned start bytes
 722          */
 723         if ((l = addr - wp) != 0) {
 724                 data = 0;
 725                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 726                         data = (data << 8) | (*(uchar *)cp);
 727                 }
 728                 for (; i<4 && cnt>0; ++i) {
 729                         data = (data << 8) | *src++;
 730                         --cnt;
 731                         ++cp;
 732                 }
 733                 for (; cnt==0 && i<4; ++i, ++cp) {
 734                         data = (data << 8) | (*(uchar *)cp);
 735                 }
 736
 737                 if ((rc = write_word(info, wp, data)) != 0) {
 738                         return (rc);
 739                 }
 740                 wp += 4;
 741         }
 742
 743         /*
 744          * handle word aligned part
 745          */
 746         while (cnt >= 4) {
 747                 data = 0;
 748                 for (i=0; i<4; ++i) {
 749                         data = (data << 8) | *src++;
 750                 }
 751                 if ((rc = write_word(info, wp, data)) != 0) {
 752                         return (rc);
 753                 }
 754                 wp  += 4;
 755                 if((wp % 0x10000)==0)
 756                         printf("."); /* show Progress */
 757                 cnt -= 4;
 758         }
 759
 760         if (cnt == 0) {
 761                 return (0);
 762         }
 763
 764         /*
 765          * handle unaligned tail bytes
 766          */
 767         data = 0;
 768         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 769                 data = (data << 8) | *src++;
 770                 --cnt;
 771         }
 772         for (; i<4; ++i, ++cp) {
 773                 data = (data << 8) | (*(uchar *)cp);
 774         }
 775         rc=write_word(info, wp, data);
 776         return rc;
 777 }
 778
 779 /*-----------------------------------------------------------------------
 780  * Write a word to Flash, returns:
 781  * 0 - OK
 782  * 1 - write timeout
 783  * 2 - Flash not erased
 784  */
 785 static FLASH_WORD_SIZE *read_val = (FLASH_WORD_SIZE *)0x200000;
 786
 787 static int write_word (flash_info_t *info, ulong dest, ulong data)
 788 {
 789         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
 790         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
 791         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
 792         ulong start;
 793         int flag;
 794         int i;
 795
 796         /* Check if Flash is (sufficiently) erased */
 797         if ((*((volatile FLASH_WORD_SIZE *)dest) &
 798                 (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
 799                 return (2);
 800         }
 801         /* Disable interrupts which might cause a timeout here */
 802         flag = disable_interrupts();
 803         for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
 804         {
 805                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 806                         /* intel style writting */
 807                         dest2[i] = (FLASH_WORD_SIZE)0x00500050;
 808                         dest2[i] = (FLASH_WORD_SIZE)0x00400040;
 809                         *read_val++ = data2[i];
 810                         dest2[i] = data2[i];
 811                         if (flag)
 812                                 enable_interrupts();
 813                         /* data polling for D7 */
 814                         start = get_timer (0);
 815                         udelay(10);
 816                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080)
 817                         {
 818                                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
 819                                         return (1);
 820                         }
 821                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 822                         udelay(10);
 823                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 824                         if(dest2[i]!=data2[i])
 825                                 printf("Error at %p 0x%04X != 0x%04X\n",&dest2[i],dest2[i],data2[i]);
 826                 }
 827                 else {
 828                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 829                         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 830                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
 831                         dest2[i] = data2[i];
 832                         /* re-enable interrupts if necessary */
 833                         if (flag)
 834                                 enable_interrupts();
 835                         /* data polling for D7 */
 836                         start = get_timer (0);
 837                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
 838                                 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
 839                                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 840                                         return (1);
 841                                 }
 842                         }
 843                 }
 844         }
 845         return (0);
 846 }
 847
 848 /*-----------------------------------------------------------------------
 849  */