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
  40 #if !defined(CONFIG_PATI)
  41 #include <ppc4xx.h>
  42 #include <asm/processor.h>
  43 #include "common_util.h"
  44 #if defined(CONFIG_MIP405)
  45 #include "../mip405/mip405.h"
  46 #endif
  47 #if defined(CONFIG_PIP405)
  48 #include "../pip405/pip405.h"
  49 #endif
  50 #include <asm/4xx_pci.h>
  51 #else /* defined(CONFIG_PATI) */
  52 #include <mpc5xx.h>
  53 #endif
  54
  55 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  56 /*-----------------------------------------------------------------------
  57  * Functions
  58  */
  59 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  60 static int write_word (flash_info_t *info, ulong dest, ulong data);
  61
  62 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt);
  63
  64 #define ADDR0           0x5555
  65 #define ADDR1           0x2aaa
  66 #define FLASH_WORD_SIZE unsigned short
  67
  68 #define FALSE           0
  69 #define TRUE            1
  70
  71 #if !defined(CONFIG_PATI)
  72
  73 /*-----------------------------------------------------------------------
  74  * Some CS switching routines:
  75  *
  76  * On PIP/MIP405 we have 3 (4) possible boot mode
  77  *
  78  * - Boot from Flash (Flash CS = CS0, MPS CS = CS1)
  79  * - Boot from MPS   (Flash CS = CS1, MPS CS = CS0)
  80  * - Boot from PCI with Flash map (Flash CS = CS0, MPS CS = CS1)
  81  * - Boot from PCI with MPS map   (Flash CS = CS1, MPS CS = CS0)
  82  * The flash init is the first board specific routine which is called
  83  * after code relocation (running from SDRAM)
  84  * The first thing we do is to map the Flash CS to the Flash area and
  85  * the MPS CS to the MPS area. Since the flash size is unknown at this
  86  * point, we use the max flash size and the lowest flash address as base.
  87  *
  88  * After flash detection we adjust the size of the CS area accordingly.
  89  * The board_init_r will fill in wrong values in the board init structure,
  90  * but this will be fixed in the misc_init_r routine:
  91  * bd->bi_flashstart=0-flash_info[0].size
  92  * bd->bi_flashsize=flash_info[0].size-CFG_MONITOR_LEN
  93  * bd->bi_flashoffset=0
  94  *
  95  */
  96 int get_boot_mode(void)
  97 {
  98         unsigned long pbcr;
  99         int res = 0;
 100         pbcr = mfdcr (strap);
 101         if ((pbcr & PSR_ROM_WIDTH_MASK) == 0)
 102                 /* boot via MPS or MPS mapping */
 103                 res = BOOT_MPS;
 104         if(pbcr & PSR_ROM_LOC)
 105                 /* boot via PCI.. */
 106                 res |= BOOT_PCI;
 107          return res;
 108 }
 109
 110 /* Map the flash high (in boot area)
 111    This code can only be executed from SDRAM (after relocation).
 112 */
 113 void setup_cs_reloc(void)
 114 {
 115         int mode;
 116         /* Since we are relocated, we can set-up the CS finaly
 117          * but first of all, switch off PCI mapping (in case it was a PCI boot) */
 118         out32r(PMM0MA,0L);
 119         icache_enable (); /* we are relocated */
 120         /* get boot mode */
 121         mode=get_boot_mode();
 122         /* we map the flash high in every case */
 123         /* first findout on which cs the flash is */
 124         if(mode & BOOT_MPS) {
 125                 /* map flash high on CS1 and MPS on CS0 */
 126                 mtdcr (ebccfga, pb0ap);
 127                 mtdcr (ebccfgd, MPS_AP);
 128                 mtdcr (ebccfga, pb0cr);
 129                 mtdcr (ebccfgd, MPS_CR);
 130                 /* we use the default values (max values) for the flash
 131                  * because its real size is not yet known */
 132                 mtdcr (ebccfga, pb1ap);
 133                 mtdcr (ebccfgd, FLASH_AP);
 134                 mtdcr (ebccfga, pb1cr);
 135                 mtdcr (ebccfgd, FLASH_CR_B);
 136         }
 137         else {
 138                 /* map flash high on CS0 and MPS on CS1 */
 139                 mtdcr (ebccfga, pb1ap);
 140                 mtdcr (ebccfgd, MPS_AP);
 141                 mtdcr (ebccfga, pb1cr);
 142                 mtdcr (ebccfgd, MPS_CR);
 143                 /* we use the default values (max values) for the flash
 144                  * because its real size is not yet known */
 145                 mtdcr (ebccfga, pb0ap);
 146                 mtdcr (ebccfgd, FLASH_AP);
 147                 mtdcr (ebccfga, pb0cr);
 148                 mtdcr (ebccfgd, FLASH_CR_B);
 149         }
 150 }
 151
 152 #endif /* #if !defined(CONFIG_PATI) */
 153
 154 unsigned long flash_init (void)
 155 {
 156         unsigned long size_b0;
 157         int i;
 158
 159 #if !defined(CONFIG_PATI)
 160         unsigned long size_b1,flashcr,size_reg;
 161         int mode;
 162         extern char version_string;
 163         char *p=&version_string;
 164
 165         /* Since we are relocated, we can set-up the CS finally */
 166         setup_cs_reloc();
 167         /* get and display boot mode */
 168         mode=get_boot_mode();
 169         if(mode & BOOT_PCI)
 170                 printf("(PCI Boot %s Map) ",(mode & BOOT_MPS) ?
 171                         "MPS" : "Flash");
 172         else
 173                 printf("(%s Boot) ",(mode & BOOT_MPS) ?
 174                         "MPS" : "Flash");
 175 #endif /* #if !defined(CONFIG_PATI) */
 176         /* Init: no FLASHes known */
 177         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 178                 flash_info[i].flash_id = FLASH_UNKNOWN;
 179         }
 180
 181         /* Static FLASH Bank configuration here - FIXME XXX */
 182
 183         size_b0 = flash_get_size((vu_long *)CFG_MONITOR_BASE, &flash_info[0]);
 184
 185         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 186                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 187                         size_b0, size_b0<<20);
 188         }
 189         /* protect the bootloader */
 190         /* Monitor protection ON by default */
 191 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 192         flash_protect(FLAG_PROTECT_SET,
 193                         CFG_MONITOR_BASE,
 194                         CFG_MONITOR_BASE+monitor_flash_len-1,
 195                         &flash_info[0]);
 196 #endif
 197 #if !defined(CONFIG_PATI)
 198         /* protect reset vector */
 199         flash_info[0].protect[flash_info[0].sector_count-1] = 1;
 200         size_b1 = 0 ;
 201         flash_info[0].size = size_b0;
 202         /* set up flash cs according to the size */
 203         size_reg=(flash_info[0].size >>20);
 204         switch (size_reg) {
 205                 case 0:
 206                 case 1: i=0; break; /* <= 1MB */
 207                 case 2: i=1; break; /* = 2MB */
 208                 case 4: i=2; break; /* = 4MB */
 209                 case 8: i=3; break; /* = 8MB */
 210                 case 16: i=4; break; /* = 16MB */
 211                 case 32: i=5; break; /* = 32MB */
 212                 case 64: i=6; break; /* = 64MB */
 213                 case 128: i=7; break; /*= 128MB */
 214                 default:
 215                         printf("\n #### ERROR, wrong size %ld MByte reset board #####\n",size_reg);
 216                         while(1);
 217         }
 218         if(mode & BOOT_MPS) {
 219                 /* flash is on CS1 */
 220                 mtdcr(ebccfga, pb1cr);
 221                 flashcr = mfdcr (ebccfgd);
 222                 /* we map the flash high in every case */
 223                 flashcr&=0x0001FFFF; /* mask out address bits */
 224                 flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
 225                 flashcr|= (i << 17); /* size addr */
 226                 mtdcr(ebccfga, pb1cr);
 227                 mtdcr(ebccfgd, flashcr);
 228         }
 229         else {
 230                 /* flash is on CS0 */
 231                 mtdcr(ebccfga, pb0cr);
 232                 flashcr = mfdcr (ebccfgd);
 233                 /* we map the flash high in every case */
 234                 flashcr&=0x0001FFFF; /* mask out address bits */
 235                 flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
 236                 flashcr|= (i << 17); /* size addr */
 237                 mtdcr(ebccfga, pb0cr);
 238                 mtdcr(ebccfgd, flashcr);
 239         }
 240 #if 0
 241         /* enable this (PIP405/MIP405 only) if you want to test if
 242            the relocation has be done ok.
 243            This will disable both Chipselects */
 244         mtdcr (ebccfga, pb0cr);
 245         mtdcr (ebccfgd, 0L);
 246         mtdcr (ebccfga, pb1cr);
 247         mtdcr (ebccfgd, 0L);
 248         printf("CS0 & CS1 switched off for test\n");
 249 #endif
 250         /* patch version_string */
 251         for(i=0;i<0x100;i++) {
 252                 if(*p=='\n') {
 253                         *p=0;
 254                         break;
 255                 }
 256                 p++;
 257         }
 258 #else /* #if !defined(CONFIG_PATI) */
 259 #ifdef  CFG_ENV_IS_IN_FLASH
 260         /* ENV protection ON by default */
 261         flash_protect(FLAG_PROTECT_SET,
 262                       CFG_ENV_ADDR,
 263                       CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
 264                       &flash_info[0]);
 265 #endif
 266 #endif /* #if !defined(CONFIG_PATI) */
 267         return (size_b0);
 268 }
 269
 270
 271 /*-----------------------------------------------------------------------
 272  */
 273 void flash_print_info  (flash_info_t *info)
 274 {
 275         int i;
 276         int k;
 277         int size;
 278         int erased;
 279         volatile unsigned long *flash;
 280
 281         if (info->flash_id == FLASH_UNKNOWN) {
 282                 printf ("missing or unknown FLASH type\n");
 283                 return;
 284         }
 285
 286         switch (info->flash_id & FLASH_VENDMASK) {
 287         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 288         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 289         case FLASH_MAN_SST:     printf ("SST ");                break;
 290         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 291         default:                printf ("Unknown Vendor ");     break;
 292         }
 293
 294         switch (info->flash_id & FLASH_TYPEMASK) {
 295         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 296                                 break;
 297         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 298                                 break;
 299         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 300                                 break;
 301         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 302                                 break;
 303         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 304                                 break;
 305         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 306                                 break;
 307         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 308                                 break;
 309         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 310                                 break;
 311         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 312                                 break;
 313         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 314                                 break;
 315         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 316                                 break;
 317         case FLASH_INTEL320T:   printf ("TE28F320C3 (32 Mbit, top sector size)\n");
 318                                 break;
 319         case FLASH_AM640U:      printf ("AM29LV640U (64 Mbit, uniform sector size)\n");
 320                                 break;
 321         default:                printf ("Unknown Chip Type\n");
 322                                 break;
 323         }
 324
 325         printf ("  Size: %ld KB in %d Sectors\n",
 326                 info->size >> 10, info->sector_count);
 327
 328         printf ("  Sector Start Addresses:");
 329         for (i=0; i<info->sector_count; ++i) {
 330                 /*
 331                  * Check if whole sector is erased
 332                 */
 333                 if (i != (info->sector_count-1))
 334                         size = info->start[i+1] - info->start[i];
 335                 else
 336                         size = info->start[0] + info->size - info->start[i];
 337                 erased = 1;
 338                 flash = (volatile unsigned long *)info->start[i];
 339                 size = size >> 2;        /* divide by 4 for longword access */
 340                 for (k=0; k<size; k++) {
 341                         if (*flash++ != 0xffffffff) {
 342                                 erased = 0;
 343                                 break;
 344                         }
 345                 }
 346                 if ((i % 5) == 0)
 347                         printf ("\n   ");
 348                 printf (" %08lX%s%s",
 349                         info->start[i],
 350                         erased ? " E" : "  ",
 351                         info->protect[i] ? "RO " : "   ");
 352         }
 353         printf ("\n");
 354 }
 355
 356 /*-----------------------------------------------------------------------
 357  */
 358
 359
 360 /*-----------------------------------------------------------------------
 361
 362 */
 363
 364 /*
 365  * The following code cannot be run from FLASH!
 366  */
 367 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 368 {
 369         short i;
 370         FLASH_WORD_SIZE value;
 371         ulong base;
 372         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 373
 374         /* Write auto select command: read Manufacturer ID */
 375         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 376         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 377         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 378
 379         value = addr2[0];
 380         /*      printf("flash_get_size value: %x\n",value); */
 381         switch (value) {
 382         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 383                 info->flash_id = FLASH_MAN_AMD;
 384                 break;
 385         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 386                 info->flash_id = FLASH_MAN_FUJ;
 387                 break;
 388         case (FLASH_WORD_SIZE)INTEL_MANUFACT:
 389                 info->flash_id = FLASH_MAN_INTEL;
 390                 break;
 391         case (FLASH_WORD_SIZE)SST_MANUFACT:
 392                 info->flash_id = FLASH_MAN_SST;
 393                 break;
 394         default:
 395                 info->flash_id = FLASH_UNKNOWN;
 396                 info->sector_count = 0;
 397                 info->size = 0;
 398                 return (0);                     /* no or unknown flash  */
 399         }
 400         value = addr2[1];                       /* device ID            */
 401         /*      printf("Device value %x\n",value);                  */
 402         switch (value) {
 403         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 404                 info->flash_id += FLASH_AM040;
 405                 info->sector_count = 8;
 406                 info->size = 0x0080000; /* => 512 ko */
 407                 break;
 408         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 409                 info->flash_id += FLASH_AM400T;
 410                 info->sector_count = 11;
 411                 info->size = 0x00080000;
 412                 break;                          /* => 0.5 MB            */
 413
 414         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 415                 info->flash_id += FLASH_AM400B;
 416                 info->sector_count = 11;
 417                 info->size = 0x00080000;
 418                 break;                          /* => 0.5 MB            */
 419
 420         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 421                 info->flash_id += FLASH_AM800T;
 422                 info->sector_count = 19;
 423                 info->size = 0x00100000;
 424                 break;                          /* => 1 MB              */
 425
 426         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 427                 info->flash_id += FLASH_AM800B;
 428                 info->sector_count = 19;
 429                 info->size = 0x00100000;
 430                 break;                          /* => 1 MB              */
 431
 432         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 433                 info->flash_id += FLASH_AM160T;
 434                 info->sector_count = 35;
 435                 info->size = 0x00200000;
 436                 break;                          /* => 2 MB              */
 437
 438         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 439                 info->flash_id += FLASH_AM160B;
 440                 info->sector_count = 35;
 441                 info->size = 0x00200000;
 442                 break;                          /* => 2 MB              */
 443         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 444                 info->flash_id += FLASH_AM320T;
 445                 info->sector_count = 67;
 446                 info->size = 0x00400000;
 447                 break;                          /* => 4 MB              */
 448         case (FLASH_WORD_SIZE)AMD_ID_LV640U:
 449                 info->flash_id += FLASH_AM640U;
 450                 info->sector_count = 128;
 451                 info->size = 0x00800000;
 452                 break;                          /* => 8 MB              */
 453 #if 0   /* enable when device IDs are available */
 454
 455         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 456                 info->flash_id += FLASH_AM320B;
 457                 info->sector_count = 67;
 458                 info->size = 0x00400000;
 459                 break;                          /* => 4 MB              */
 460 #endif
 461         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 462                 info->flash_id += FLASH_SST800A;
 463                 info->sector_count = 16;
 464                 info->size = 0x00100000;
 465                 break;                          /* => 1 MB              */
 466         case (FLASH_WORD_SIZE)INTEL_ID_28F320C3T:
 467                 info->flash_id += FLASH_INTEL320T;
 468                 info->sector_count = 71;
 469                 info->size = 0x00400000;
 470                 break;                          /* => 4 MB              */
 471
 472
 473         case (FLASH_WORD_SIZE)SST_ID_xF160A:
 474                 info->flash_id += FLASH_SST160A;
 475                 info->sector_count = 32;
 476                 info->size = 0x00200000;
 477                 break;                          /* => 2 MB              */
 478
 479         default:
 480                 info->flash_id = FLASH_UNKNOWN;
 481                 return (0);                     /* => no or unknown flash */
 482
 483         }
 484         /* base address calculation */
 485         base=0-info->size;
 486         /* set up sector start address table */
 487         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 488              (info->flash_id  == FLASH_AM040) ||
 489              (info->flash_id  == FLASH_AM640U)){
 490                 for (i = 0; i < info->sector_count; i++)
 491                         info->start[i] = base + (i * 0x00010000);
 492         }
 493         else {
 494                 if (info->flash_id & FLASH_BTYPE) {
 495                         /* set sector offsets for bottom boot block type        */
 496                         info->start[0] = base + 0x00000000;
 497                         info->start[1] = base + 0x00004000;
 498                         info->start[2] = base + 0x00006000;
 499                         info->start[3] = base + 0x00008000;
 500                         for (i = 4; i < info->sector_count; i++)
 501                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 502                 }
 503                 else {
 504                         /* set sector offsets for top boot block type           */
 505                         i = info->sector_count - 1;
 506                         if(info->sector_count==71) {
 507
 508                                 info->start[i--] = base + info->size - 0x00002000;
 509                                 info->start[i--] = base + info->size - 0x00004000;
 510                                 info->start[i--] = base + info->size - 0x00006000;
 511                                 info->start[i--] = base + info->size - 0x00008000;
 512                                 info->start[i--] = base + info->size - 0x0000A000;
 513                                 info->start[i--] = base + info->size - 0x0000C000;
 514                                 info->start[i--] = base + info->size - 0x0000E000;
 515                                 for (; i >= 0; i--)
 516                                         info->start[i] = base + i * 0x000010000;
 517                         }
 518                         else {
 519                                 info->start[i--] = base + info->size - 0x00004000;
 520                                 info->start[i--] = base + info->size - 0x00006000;
 521                                 info->start[i--] = base + info->size - 0x00008000;
 522                                 for (; i >= 0; i--)
 523                                         info->start[i] = base + i * 0x00010000;
 524                         }
 525                 }
 526         }
 527
 528         /* check for protected sectors */
 529         for (i = 0; i < info->sector_count; i++) {
 530                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 531                 /* D0 = 1 if protected */
 532                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 533                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
 534                         info->protect[i] = 0;
 535                 else
 536                         info->protect[i] = addr2[2] & 1;
 537         }
 538
 539         /*
 540          * Prevent writes to uninitialized FLASH.
 541          */
 542         if (info->flash_id != FLASH_UNKNOWN) {
 543                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 544                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 545         }
 546         return (info->size);
 547 }
 548
 549
 550 int wait_for_DQ7(flash_info_t *info, int sect)
 551 {
 552         ulong start, now, last;
 553         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 554
 555         start = get_timer (0);
 556         last  = start;
 557         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 558                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 559                         printf ("Timeout\n");
 560                         return ERR_TIMOUT;
 561                 }
 562                 /* show that we're waiting */
 563                 if ((now - last) > 1000) {  /* every second */
 564                         putc ('.');
 565                         last = now;
 566                 }
 567         }
 568         return ERR_OK;
 569 }
 570
 571 int intel_wait_for_DQ7(flash_info_t *info, int sect)
 572 {
 573         ulong start, now, last, status;
 574         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 575
 576         start = get_timer (0);
 577         last  = start;
 578         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 579                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 580                         printf ("Timeout\n");
 581                         return ERR_TIMOUT;
 582                 }
 583                 /* show that we're waiting */
 584                 if ((now - last) > 1000) {  /* every second */
 585                         putc ('.');
 586                         last = now;
 587                 }
 588         }
 589         status = addr[0] & (FLASH_WORD_SIZE)0x00280028;
 590         /* clear status register */
 591         addr[0] = (FLASH_WORD_SIZE)0x00500050;
 592         /* check status for block erase fail and VPP low */
 593         return (status == 0 ? ERR_OK : ERR_NOT_ERASED);
 594 }
 595
 596 /*-----------------------------------------------------------------------
 597  */
 598
 599 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 600 {
 601         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 602         volatile FLASH_WORD_SIZE *addr2;
 603         int flag, prot, sect, l_sect;
 604         int i, rcode = 0;
 605
 606
 607         if ((s_first < 0) || (s_first > s_last)) {
 608                 if (info->flash_id == FLASH_UNKNOWN) {
 609                         printf ("- missing\n");
 610                 } else {
 611                         printf ("- no sectors to erase\n");
 612                 }
 613                 return 1;
 614         }
 615
 616         if (info->flash_id == FLASH_UNKNOWN) {
 617                 printf ("Can't erase unknown flash type - aborted\n");
 618                 return 1;
 619         }
 620
 621         prot = 0;
 622         for (sect=s_first; sect<=s_last; ++sect) {
 623                 if (info->protect[sect]) {
 624                         prot++;
 625                 }
 626         }
 627
 628         if (prot) {
 629                 printf ("- Warning: %d protected sectors will not be erased!\n",
 630                         prot);
 631         } else {
 632                 printf ("\n");
 633         }
 634
 635         l_sect = -1;
 636
 637         /* Disable interrupts which might cause a timeout here */
 638         flag = disable_interrupts();
 639
 640         /* Start erase on unprotected sectors */
 641         for (sect = s_first; sect<=s_last; sect++) {
 642                 if (info->protect[sect] == 0) { /* not protected */
 643                         addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 644                         /*  printf("Erasing sector %p\n", addr2); */ /* CLH */
 645                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 646                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 647                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 648                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 649                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 650                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 651                                 addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
 652                                 for (i=0; i<50; i++)
 653                                         udelay(1000);  /* wait 1 ms */
 654                                 rcode |= wait_for_DQ7(info, sect);
 655                         }
 656                         else {
 657                                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 658                                         addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector */
 659                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 660                                         intel_wait_for_DQ7(info, sect);
 661                                         addr2[0] = (FLASH_WORD_SIZE)0x00200020;  /* sector erase */
 662                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 663                                         rcode |= intel_wait_for_DQ7(info, sect);
 664                                 }
 665                                 else {
 666                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 667                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 668                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 669                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 670                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 671                                         addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 672                                         rcode |= wait_for_DQ7(info, sect);
 673                                 }
 674                         }
 675                         l_sect = sect;
 676                         /*
 677                          * Wait for each sector to complete, it's more
 678                          * reliable.  According to AMD Spec, you must
 679                          * issue all erase commands within a specified
 680                          * timeout.  This has been seen to fail, especially
 681                          * if printf()s are included (for debug)!!
 682                          */
 683                         /*   wait_for_DQ7(info, sect); */
 684                 }
 685         }
 686
 687         /* re-enable interrupts if necessary */
 688         if (flag)
 689                 enable_interrupts();
 690
 691         /* wait at least 80us - let's wait 1 ms */
 692         udelay (1000);
 693
 694 #if 0
 695         /*
 696          * We wait for the last triggered sector
 697          */
 698         if (l_sect < 0)
 699                 goto DONE;
 700         wait_for_DQ7(info, l_sect);
 701
 702 DONE:
 703 #endif
 704         /* reset to read mode */
 705         addr = (FLASH_WORD_SIZE *)info->start[0];
 706         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */
 707
 708         if (!rcode)
 709             printf (" done\n");
 710
 711         return rcode;
 712 }
 713
 714
 715 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt)
 716 {
 717         int i;
 718         volatile FLASH_WORD_SIZE *addr2;
 719         long c;
 720         c= (long)cnt;
 721         for(i=info->sector_count-1;i>0;i--)
 722         {
 723                 if(addr>=info->start[i])
 724                         break;
 725         }
 726         do {
 727                 addr2 = (FLASH_WORD_SIZE *)(info->start[i]);
 728                 addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector setup */
 729                 addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* unlock sector */
 730                 intel_wait_for_DQ7(info, i);
 731                 i++;
 732                 c-=(info->start[i]-info->start[i-1]);
 733         }while(c>0);
 734 }
 735
 736
 737 /*-----------------------------------------------------------------------
 738  * Copy memory to flash, returns:
 739  * 0 - OK
 740  * 1 - write timeout
 741  * 2 - Flash not erased
 742  */
 743
 744 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 745 {
 746         ulong cp, wp, data;
 747         int i, l, rc;
 748
 749         if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 750                 unlock_intel_sectors(info,addr,cnt);
 751         }
 752         wp = (addr & ~3);       /* get lower word aligned address */
 753         /*
 754          * handle unaligned start bytes
 755          */
 756         if ((l = addr - wp) != 0) {
 757                 data = 0;
 758                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 759                         data = (data << 8) | (*(uchar *)cp);
 760                 }
 761                 for (; i<4 && cnt>0; ++i) {
 762                         data = (data << 8) | *src++;
 763                         --cnt;
 764                         ++cp;
 765                 }
 766                 for (; cnt==0 && i<4; ++i, ++cp) {
 767                         data = (data << 8) | (*(uchar *)cp);
 768                 }
 769
 770                 if ((rc = write_word(info, wp, data)) != 0) {
 771                         return (rc);
 772                 }
 773                 wp += 4;
 774         }
 775
 776         /*
 777          * handle word aligned part
 778          */
 779         while (cnt >= 4) {
 780                 data = 0;
 781                 for (i=0; i<4; ++i) {
 782                         data = (data << 8) | *src++;
 783                 }
 784                 if ((rc = write_word(info, wp, data)) != 0) {
 785                         return (rc);
 786                 }
 787                 wp  += 4;
 788                 if((wp % 0x10000)==0)
 789                         printf("."); /* show Progress */
 790                 cnt -= 4;
 791         }
 792
 793         if (cnt == 0) {
 794                 return (0);
 795         }
 796
 797         /*
 798          * handle unaligned tail bytes
 799          */
 800         data = 0;
 801         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 802                 data = (data << 8) | *src++;
 803                 --cnt;
 804         }
 805         for (; i<4; ++i, ++cp) {
 806                 data = (data << 8) | (*(uchar *)cp);
 807         }
 808         rc=write_word(info, wp, data);
 809         return rc;
 810 }
 811
 812 /*-----------------------------------------------------------------------
 813  * Write a word to Flash, returns:
 814  * 0 - OK
 815  * 1 - write timeout
 816  * 2 - Flash not erased
 817  */
 818 static FLASH_WORD_SIZE *read_val = (FLASH_WORD_SIZE *)0x200000;
 819
 820 static int write_word (flash_info_t *info, ulong dest, ulong data)
 821 {
 822         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
 823         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
 824         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
 825         ulong start;
 826         int flag;
 827         int i;
 828
 829         /* Check if Flash is (sufficiently) erased */
 830         if ((*((volatile FLASH_WORD_SIZE *)dest) &
 831                 (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
 832                 return (2);
 833         }
 834         /* Disable interrupts which might cause a timeout here */
 835         flag = disable_interrupts();
 836         for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
 837         {
 838                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 839                         /* intel style writting */
 840                         dest2[i] = (FLASH_WORD_SIZE)0x00500050;
 841                         dest2[i] = (FLASH_WORD_SIZE)0x00400040;
 842                         *read_val++ = data2[i];
 843                         dest2[i] = data2[i];
 844                         if (flag)
 845                                 enable_interrupts();
 846                         /* data polling for D7 */
 847                         start = get_timer (0);
 848                         udelay(10);
 849                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080)
 850                         {
 851                                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
 852                                         return (1);
 853                         }
 854                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 855                         udelay(10);
 856                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 857                         if(dest2[i]!=data2[i])
 858                                 printf("Error at %p 0x%04X != 0x%04X\n",&dest2[i],dest2[i],data2[i]);
 859                 }
 860                 else {
 861                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 862                         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 863                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
 864                         dest2[i] = data2[i];
 865                         /* re-enable interrupts if necessary */
 866                         if (flag)
 867                                 enable_interrupts();
 868                         /* data polling for D7 */
 869                         start = get_timer (0);
 870                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
 871                                 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
 872                                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 873                                         return (1);
 874                                 }
 875                         }
 876                 }
 877         }
 878         return (0);
 879 }
 880
 881 /*-----------------------------------------------------------------------
 882  */