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