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 <asm/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[CONFIG_SYS_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-CONFIG_SYS_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 (CPC0_PSR);
 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 (EBC0_CFGADDR, PB0AP);
 127                 mtdcr (EBC0_CFGDATA, MPS_AP);
 128                 mtdcr (EBC0_CFGADDR, PB0CR);
 129                 mtdcr (EBC0_CFGDATA, MPS_CR);
 130                 /* we use the default values (max values) for the flash
 131                  * because its real size is not yet known */
 132                 mtdcr (EBC0_CFGADDR, PB1AP);
 133                 mtdcr (EBC0_CFGDATA, FLASH_AP);
 134                 mtdcr (EBC0_CFGADDR, PB1CR);
 135                 mtdcr (EBC0_CFGDATA, FLASH_CR_B);
 136         }
 137         else {
 138                 /* map flash high on CS0 and MPS on CS1 */
 139                 mtdcr (EBC0_CFGADDR, PB1AP);
 140                 mtdcr (EBC0_CFGDATA, MPS_AP);
 141                 mtdcr (EBC0_CFGADDR, PB1CR);
 142                 mtdcr (EBC0_CFGDATA, MPS_CR);
 143                 /* we use the default values (max values) for the flash
 144                  * because its real size is not yet known */
 145                 mtdcr (EBC0_CFGADDR, PB0AP);
 146                 mtdcr (EBC0_CFGDATA, FLASH_AP);
 147                 mtdcr (EBC0_CFGADDR, PB0CR);
 148                 mtdcr (EBC0_CFGDATA, 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 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<CONFIG_SYS_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 *)CONFIG_SYS_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 CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 192         flash_protect(FLAG_PROTECT_SET,
 193                         CONFIG_SYS_MONITOR_BASE,
 194                         CONFIG_SYS_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         flash_info[0].size = size_b0;
 201         /* set up flash cs according to the size */
 202         size_reg=(flash_info[0].size >>20);
 203         switch (size_reg) {
 204                 case 0:
 205                 case 1: i=0; break; /* <= 1MB */
 206                 case 2: i=1; break; /* = 2MB */
 207                 case 4: i=2; break; /* = 4MB */
 208                 case 8: i=3; break; /* = 8MB */
 209                 case 16: i=4; break; /* = 16MB */
 210                 case 32: i=5; break; /* = 32MB */
 211                 case 64: i=6; break; /* = 64MB */
 212                 case 128: i=7; break; /*= 128MB */
 213                 default:
 214                         printf("\n #### ERROR, wrong size %ld MByte reset board #####\n",size_reg);
 215                         while(1);
 216         }
 217         if(mode & BOOT_MPS) {
 218                 /* flash is on CS1 */
 219                 mtdcr(EBC0_CFGADDR, PB1CR);
 220                 flashcr = mfdcr (EBC0_CFGDATA);
 221                 /* we map the flash high in every case */
 222                 flashcr&=0x0001FFFF; /* mask out address bits */
 223                 flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
 224                 flashcr|= (i << 17); /* size addr */
 225                 mtdcr(EBC0_CFGADDR, PB1CR);
 226                 mtdcr(EBC0_CFGDATA, flashcr);
 227         }
 228         else {
 229                 /* flash is on CS0 */
 230                 mtdcr(EBC0_CFGADDR, PB0CR);
 231                 flashcr = mfdcr (EBC0_CFGDATA);
 232                 /* we map the flash high in every case */
 233                 flashcr&=0x0001FFFF; /* mask out address bits */
 234                 flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
 235                 flashcr|= (i << 17); /* size addr */
 236                 mtdcr(EBC0_CFGADDR, PB0CR);
 237                 mtdcr(EBC0_CFGDATA, flashcr);
 238         }
 239 #if 0
 240         /* enable this (PIP405/MIP405 only) if you want to test if
 241            the relocation has be done ok.
 242            This will disable both Chipselects */
 243         mtdcr (EBC0_CFGADDR, PB0CR);
 244         mtdcr (EBC0_CFGDATA, 0L);
 245         mtdcr (EBC0_CFGADDR, PB1CR);
 246         mtdcr (EBC0_CFGDATA, 0L);
 247         printf("CS0 & CS1 switched off for test\n");
 248 #endif
 249         /* patch version_string */
 250         for(i=0;i<0x100;i++) {
 251                 if(*p=='\n') {
 252                         *p=0;
 253                         break;
 254                 }
 255                 p++;
 256         }
 257 #else /* #if !defined(CONFIG_PATI) */
 258 #ifdef  CONFIG_ENV_IS_IN_FLASH
 259         /* ENV protection ON by default */
 260         flash_protect(FLAG_PROTECT_SET,
 261                       CONFIG_ENV_ADDR,
 262                       CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
 263                       &flash_info[0]);
 264 #endif
 265 #endif /* #if !defined(CONFIG_PATI) */
 266         return (size_b0);
 267 }
 268
 269
 270 /*-----------------------------------------------------------------------
 271  */
 272 void flash_print_info  (flash_info_t *info)
 273 {
 274         int i;
 275         int k;
 276         int size;
 277         int erased;
 278         volatile unsigned long *flash;
 279
 280         if (info->flash_id == FLASH_UNKNOWN) {
 281                 printf ("missing or unknown FLASH type\n");
 282                 return;
 283         }
 284
 285         switch (info->flash_id & FLASH_VENDMASK) {
 286         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 287         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 288         case FLASH_MAN_SST:     printf ("SST ");                break;
 289         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 290         default:                printf ("Unknown Vendor ");     break;
 291         }
 292
 293         switch (info->flash_id & FLASH_TYPEMASK) {
 294         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 295                                 break;
 296         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 297                                 break;
 298         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 299                                 break;
 300         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 301                                 break;
 302         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 303                                 break;
 304         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 305                                 break;
 306         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 307                                 break;
 308         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 309                                 break;
 310         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 311                                 break;
 312         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 313                                 break;
 314         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 315                                 break;
 316         case FLASH_INTEL320T:   printf ("TE28F320C3 (32 Mbit, top sector size)\n");
 317                                 break;
 318         case FLASH_AM640U:      printf ("AM29LV640U (64 Mbit, uniform sector size)\n");
 319                                 break;
 320         default:                printf ("Unknown Chip Type\n");
 321                                 break;
 322         }
 323
 324         printf ("  Size: %ld KB in %d Sectors\n",
 325                 info->size >> 10, info->sector_count);
 326
 327         printf ("  Sector Start Addresses:");
 328         for (i=0; i<info->sector_count; ++i) {
 329                 /*
 330                  * Check if whole sector is erased
 331                 */
 332                 if (i != (info->sector_count-1))
 333                         size = info->start[i+1] - info->start[i];
 334                 else
 335                         size = info->start[0] + info->size - info->start[i];
 336                 erased = 1;
 337                 flash = (volatile unsigned long *)info->start[i];
 338                 size = size >> 2;        /* divide by 4 for longword access */
 339                 for (k=0; k<size; k++) {
 340                         if (*flash++ != 0xffffffff) {
 341                                 erased = 0;
 342                                 break;
 343                         }
 344                 }
 345                 if ((i % 5) == 0)
 346                         printf ("\n   ");
 347                 printf (" %08lX%s%s",
 348                         info->start[i],
 349                         erased ? " E" : "  ",
 350                         info->protect[i] ? "RO " : "   ");
 351         }
 352         printf ("\n");
 353 }
 354
 355 /*-----------------------------------------------------------------------
 356  */
 357
 358
 359 /*-----------------------------------------------------------------------
 360
 361 */
 362
 363 /*
 364  * The following code cannot be run from FLASH!
 365  */
 366 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 367 {
 368         short i;
 369         FLASH_WORD_SIZE value;
 370         ulong base;
 371         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 372
 373         /* Write auto select command: read Manufacturer ID */
 374         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 375         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 376         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 377
 378         value = addr2[0];
 379         /*      printf("flash_get_size value: %x\n",value); */
 380         switch (value) {
 381         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 382                 info->flash_id = FLASH_MAN_AMD;
 383                 break;
 384         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 385                 info->flash_id = FLASH_MAN_FUJ;
 386                 break;
 387         case (FLASH_WORD_SIZE)INTEL_MANUFACT:
 388                 info->flash_id = FLASH_MAN_INTEL;
 389                 break;
 390         case (FLASH_WORD_SIZE)SST_MANUFACT:
 391                 info->flash_id = FLASH_MAN_SST;
 392                 break;
 393         default:
 394                 info->flash_id = FLASH_UNKNOWN;
 395                 info->sector_count = 0;
 396                 info->size = 0;
 397                 return (0);                     /* no or unknown flash  */
 398         }
 399         value = addr2[1];                       /* device ID            */
 400         /*      printf("Device value %x\n",value);                  */
 401         switch (value) {
 402         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 403                 info->flash_id += FLASH_AM040;
 404                 info->sector_count = 8;
 405                 info->size = 0x0080000; /* => 512 ko */
 406                 break;
 407         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 408                 info->flash_id += FLASH_AM400T;
 409                 info->sector_count = 11;
 410                 info->size = 0x00080000;
 411                 break;                          /* => 0.5 MB            */
 412
 413         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 414                 info->flash_id += FLASH_AM400B;
 415                 info->sector_count = 11;
 416                 info->size = 0x00080000;
 417                 break;                          /* => 0.5 MB            */
 418
 419         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 420                 info->flash_id += FLASH_AM800T;
 421                 info->sector_count = 19;
 422                 info->size = 0x00100000;
 423                 break;                          /* => 1 MB              */
 424
 425         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 426                 info->flash_id += FLASH_AM800B;
 427                 info->sector_count = 19;
 428                 info->size = 0x00100000;
 429                 break;                          /* => 1 MB              */
 430
 431         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 432                 info->flash_id += FLASH_AM160T;
 433                 info->sector_count = 35;
 434                 info->size = 0x00200000;
 435                 break;                          /* => 2 MB              */
 436
 437         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 438                 info->flash_id += FLASH_AM160B;
 439                 info->sector_count = 35;
 440                 info->size = 0x00200000;
 441                 break;                          /* => 2 MB              */
 442         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 443                 info->flash_id += FLASH_AM320T;
 444                 info->sector_count = 67;
 445                 info->size = 0x00400000;
 446                 break;                          /* => 4 MB              */
 447         case (FLASH_WORD_SIZE)AMD_ID_LV640U:
 448                 info->flash_id += FLASH_AM640U;
 449                 info->sector_count = 128;
 450                 info->size = 0x00800000;
 451                 break;                          /* => 8 MB              */
 452 #if 0   /* enable when device IDs are available */
 453
 454         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 455                 info->flash_id += FLASH_AM320B;
 456                 info->sector_count = 67;
 457                 info->size = 0x00400000;
 458                 break;                          /* => 4 MB              */
 459 #endif
 460         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 461                 info->flash_id += FLASH_SST800A;
 462                 info->sector_count = 16;
 463                 info->size = 0x00100000;
 464                 break;                          /* => 1 MB              */
 465         case (FLASH_WORD_SIZE)INTEL_ID_28F320C3T:
 466                 info->flash_id += FLASH_INTEL320T;
 467                 info->sector_count = 71;
 468                 info->size = 0x00400000;
 469                 break;                          /* => 4 MB              */
 470
 471
 472         case (FLASH_WORD_SIZE)SST_ID_xF160A:
 473                 info->flash_id += FLASH_SST160A;
 474                 info->sector_count = 32;
 475                 info->size = 0x00200000;
 476                 break;                          /* => 2 MB              */
 477
 478         default:
 479                 info->flash_id = FLASH_UNKNOWN;
 480                 return (0);                     /* => no or unknown flash */
 481
 482         }
 483         /* base address calculation */
 484         base=0-info->size;
 485         /* set up sector start address table */
 486         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 487              (info->flash_id  == FLASH_AM040) ||
 488              (info->flash_id  == FLASH_AM640U)){
 489                 for (i = 0; i < info->sector_count; i++)
 490                         info->start[i] = base + (i * 0x00010000);
 491         }
 492         else {
 493                 if (info->flash_id & FLASH_BTYPE) {
 494                         /* set sector offsets for bottom boot block type        */
 495                         info->start[0] = base + 0x00000000;
 496                         info->start[1] = base + 0x00004000;
 497                         info->start[2] = base + 0x00006000;
 498                         info->start[3] = base + 0x00008000;
 499                         for (i = 4; i < info->sector_count; i++)
 500                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 501                 }
 502                 else {
 503                         /* set sector offsets for top boot block type           */
 504                         i = info->sector_count - 1;
 505                         if(info->sector_count==71) {
 506
 507                                 info->start[i--] = base + info->size - 0x00002000;
 508                                 info->start[i--] = base + info->size - 0x00004000;
 509                                 info->start[i--] = base + info->size - 0x00006000;
 510                                 info->start[i--] = base + info->size - 0x00008000;
 511                                 info->start[i--] = base + info->size - 0x0000A000;
 512                                 info->start[i--] = base + info->size - 0x0000C000;
 513                                 info->start[i--] = base + info->size - 0x0000E000;
 514                                 for (; i >= 0; i--)
 515                                         info->start[i] = base + i * 0x000010000;
 516                         }
 517                         else {
 518                                 info->start[i--] = base + info->size - 0x00004000;
 519                                 info->start[i--] = base + info->size - 0x00006000;
 520                                 info->start[i--] = base + info->size - 0x00008000;
 521                                 for (; i >= 0; i--)
 522                                         info->start[i] = base + i * 0x00010000;
 523                         }
 524                 }
 525         }
 526
 527         /* check for protected sectors */
 528         for (i = 0; i < info->sector_count; i++) {
 529                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 530                 /* D0 = 1 if protected */
 531                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 532                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
 533                         info->protect[i] = 0;
 534                 else
 535                         info->protect[i] = addr2[2] & 1;
 536         }
 537
 538         /*
 539          * Prevent writes to uninitialized FLASH.
 540          */
 541         if (info->flash_id != FLASH_UNKNOWN) {
 542                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 543                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 544         }
 545         return (info->size);
 546 }
 547
 548
 549 int wait_for_DQ7(flash_info_t *info, int sect)
 550 {
 551         ulong start, now, last;
 552         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 553
 554         start = get_timer (0);
 555         last  = start;
 556         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 557                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 558                         printf ("Timeout\n");
 559                         return ERR_TIMOUT;
 560                 }
 561                 /* show that we're waiting */
 562                 if ((now - last) > 1000) {  /* every second */
 563                         putc ('.');
 564                         last = now;
 565                 }
 566         }
 567         return ERR_OK;
 568 }
 569
 570 int intel_wait_for_DQ7(flash_info_t *info, int sect)
 571 {
 572         ulong start, now, last, status;
 573         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 574
 575         start = get_timer (0);
 576         last  = start;
 577         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 578                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 579                         printf ("Timeout\n");
 580                         return ERR_TIMOUT;
 581                 }
 582                 /* show that we're waiting */
 583                 if ((now - last) > 1000) {  /* every second */
 584                         putc ('.');
 585                         last = now;
 586                 }
 587         }
 588         status = addr[0] & (FLASH_WORD_SIZE)0x00280028;
 589         /* clear status register */
 590         addr[0] = (FLASH_WORD_SIZE)0x00500050;
 591         /* check status for block erase fail and VPP low */
 592         return (status == 0 ? ERR_OK : ERR_NOT_ERASED);
 593 }
 594
 595 /*-----------------------------------------------------------------------
 596  */
 597
 598 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 599 {
 600         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 601         volatile FLASH_WORD_SIZE *addr2;
 602         int flag, prot, sect;
 603         int i, rcode = 0;
 604
 605
 606         if ((s_first < 0) || (s_first > s_last)) {
 607                 if (info->flash_id == FLASH_UNKNOWN) {
 608                         printf ("- missing\n");
 609                 } else {
 610                         printf ("- no sectors to erase\n");
 611                 }
 612                 return 1;
 613         }
 614
 615         if (info->flash_id == FLASH_UNKNOWN) {
 616                 printf ("Can't erase unknown flash type - aborted\n");
 617                 return 1;
 618         }
 619
 620         prot = 0;
 621         for (sect=s_first; sect<=s_last; ++sect) {
 622                 if (info->protect[sect]) {
 623                         prot++;
 624                 }
 625         }
 626
 627         if (prot) {
 628                 printf ("- Warning: %d protected sectors will not be erased!\n",
 629                         prot);
 630         } else {
 631                 printf ("\n");
 632         }
 633
 634         /* Disable interrupts which might cause a timeout here */
 635         flag = disable_interrupts();
 636
 637         /* Start erase on unprotected sectors */
 638         for (sect = s_first; sect<=s_last; sect++) {
 639                 if (info->protect[sect] == 0) { /* not protected */
 640                         addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 641                         /*  printf("Erasing sector %p\n", addr2); */ /* CLH */
 642                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 643                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 644                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 645                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 646                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 647                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 648                                 addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
 649                                 for (i=0; i<50; i++)
 650                                         udelay(1000);  /* wait 1 ms */
 651                                 rcode |= wait_for_DQ7(info, sect);
 652                         }
 653                         else {
 654                                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 655                                         addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector */
 656                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 657                                         intel_wait_for_DQ7(info, sect);
 658                                         addr2[0] = (FLASH_WORD_SIZE)0x00200020;  /* sector erase */
 659                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 660                                         rcode |= intel_wait_for_DQ7(info, sect);
 661                                 }
 662                                 else {
 663                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 664                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 665                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 666                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 667                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 668                                         addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 669                                         rcode |= wait_for_DQ7(info, sect);
 670                                 }
 671                         }
 672                         /*
 673                          * Wait for each sector to complete, it's more
 674                          * reliable.  According to AMD Spec, you must
 675                          * issue all erase commands within a specified
 676                          * timeout.  This has been seen to fail, especially
 677                          * if printf()s are included (for debug)!!
 678                          */
 679                         /*   wait_for_DQ7(info, sect); */
 680                 }
 681         }
 682
 683         /* re-enable interrupts if necessary */
 684         if (flag)
 685                 enable_interrupts();
 686
 687         /* wait at least 80us - let's wait 1 ms */
 688         udelay (1000);
 689
 690         /* reset to read mode */
 691         addr = (FLASH_WORD_SIZE *)info->start[0];
 692         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */
 693
 694         if (!rcode)
 695             printf (" done\n");
 696
 697         return rcode;
 698 }
 699
 700
 701 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt)
 702 {
 703         int i;
 704         volatile FLASH_WORD_SIZE *addr2;
 705         long c;
 706         c= (long)cnt;
 707         for(i=info->sector_count-1;i>0;i--)
 708         {
 709                 if(addr>=info->start[i])
 710                         break;
 711         }
 712         do {
 713                 addr2 = (FLASH_WORD_SIZE *)(info->start[i]);
 714                 addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector setup */
 715                 addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* unlock sector */
 716                 intel_wait_for_DQ7(info, i);
 717                 i++;
 718                 c-=(info->start[i]-info->start[i-1]);
 719         }while(c>0);
 720 }
 721
 722
 723 /*-----------------------------------------------------------------------
 724  * Copy memory to flash, returns:
 725  * 0 - OK
 726  * 1 - write timeout
 727  * 2 - Flash not erased
 728  */
 729
 730 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 731 {
 732         ulong cp, wp, data;
 733         int i, l, rc;
 734
 735         if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 736                 unlock_intel_sectors(info,addr,cnt);
 737         }
 738         wp = (addr & ~3);       /* get lower word aligned address */
 739         /*
 740          * handle unaligned start bytes
 741          */
 742         if ((l = addr - wp) != 0) {
 743                 data = 0;
 744                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 745                         data = (data << 8) | (*(uchar *)cp);
 746                 }
 747                 for (; i<4 && cnt>0; ++i) {
 748                         data = (data << 8) | *src++;
 749                         --cnt;
 750                         ++cp;
 751                 }
 752                 for (; cnt==0 && i<4; ++i, ++cp) {
 753                         data = (data << 8) | (*(uchar *)cp);
 754                 }
 755
 756                 if ((rc = write_word(info, wp, data)) != 0) {
 757                         return (rc);
 758                 }
 759                 wp += 4;
 760         }
 761
 762         /*
 763          * handle word aligned part
 764          */
 765         while (cnt >= 4) {
 766                 data = 0;
 767                 for (i=0; i<4; ++i) {
 768                         data = (data << 8) | *src++;
 769                 }
 770                 if ((rc = write_word(info, wp, data)) != 0) {
 771                         return (rc);
 772                 }
 773                 wp  += 4;
 774                 if((wp % 0x10000)==0)
 775                         printf("."); /* show Progress */
 776                 cnt -= 4;
 777         }
 778
 779         if (cnt == 0) {
 780                 return (0);
 781         }
 782
 783         /*
 784          * handle unaligned tail bytes
 785          */
 786         data = 0;
 787         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 788                 data = (data << 8) | *src++;
 789                 --cnt;
 790         }
 791         for (; i<4; ++i, ++cp) {
 792                 data = (data << 8) | (*(uchar *)cp);
 793         }
 794         rc=write_word(info, wp, data);
 795         return rc;
 796 }
 797
 798 /*-----------------------------------------------------------------------
 799  * Write a word to Flash, returns:
 800  * 0 - OK
 801  * 1 - write timeout
 802  * 2 - Flash not erased
 803  */
 804 static FLASH_WORD_SIZE *read_val = (FLASH_WORD_SIZE *)0x200000;
 805
 806 static int write_word (flash_info_t *info, ulong dest, ulong data)
 807 {
 808         volatile FLASH_WORD_SIZE *addr2 = (volatile FLASH_WORD_SIZE *)(info->start[0]);
 809         volatile FLASH_WORD_SIZE *dest2 = (volatile FLASH_WORD_SIZE *)dest;
 810         volatile FLASH_WORD_SIZE *data2;
 811         ulong start;
 812         ulong *data_p;
 813         int flag;
 814         int i;
 815
 816         data_p = &data;
 817         data2 = (volatile FLASH_WORD_SIZE *)data_p;
 818
 819         /* Check if Flash is (sufficiently) erased */
 820         if ((*((volatile FLASH_WORD_SIZE *)dest) &
 821                 (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
 822                 return (2);
 823         }
 824         /* Disable interrupts which might cause a timeout here */
 825         flag = disable_interrupts();
 826         for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
 827         {
 828                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 829                         /* intel style writting */
 830                         dest2[i] = (FLASH_WORD_SIZE)0x00500050;
 831                         dest2[i] = (FLASH_WORD_SIZE)0x00400040;
 832                         *read_val++ = data2[i];
 833                         dest2[i] = data2[i];
 834                         if (flag)
 835                                 enable_interrupts();
 836                         /* data polling for D7 */
 837                         start = get_timer (0);
 838                         udelay(10);
 839                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080)
 840                         {
 841                                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 842                                         return (1);
 843                         }
 844                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 845                         udelay(10);
 846                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 847                         if(dest2[i]!=data2[i])
 848                                 printf("Error at %p 0x%04X != 0x%04X\n",&dest2[i],dest2[i],data2[i]);
 849                 }
 850                 else {
 851                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 852                         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 853                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
 854                         dest2[i] = data2[i];
 855                         /* re-enable interrupts if necessary */
 856                         if (flag)
 857                                 enable_interrupts();
 858                         /* data polling for D7 */
 859                         start = get_timer (0);
 860                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
 861                                 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
 862                                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 863                                         return (1);
 864                                 }
 865                         }
 866                 }
 867         }
 868         return (0);
 869 }
 870
 871 /*-----------------------------------------------------------------------
 872  */