board/mpl/common/flash.c

   1 /*
   2  * (C) Copyright 2000, 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * Modified 4/5/2001
  26  * Wait for completion of each sector erase command issued
  27  * 4/5/2001
  28  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  29  */
  30
  31 /*
  32  * Modified 3/7/2001
  33  * - adapted for pip405, Denis Peter, MPL AG Switzerland
  34  * TODO:
  35  * clean-up
  36  */
  37
  38 #include <common.h>
  39 #include <ppc4xx.h>
  40 #include <asm/processor.h>
  41 #include "common_util.h"
  42 #if defined(CONFIG_MIP405)
  43 #include "../mip405/mip405.h"
  44 #endif
  45 #if defined(CONFIG_PIP405)
  46 #include "../pip405/pip405.h"
  47 #endif
  48 #include <405gp_pci.h>
  49
  50 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  51 /*-----------------------------------------------------------------------
  52  * Functions
  53  */
  54 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  55 static int write_word (flash_info_t *info, ulong dest, ulong data);
  56
  57 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt);
  58
  59
  60 #ifdef CONFIG_PIP405
  61 #define ADDR0           0x5555
  62 #define ADDR1           0x2aaa
  63 #define FLASH_WORD_SIZE unsigned short
  64 #endif
  65
  66 #ifdef CONFIG_MIP405
  67 #define ADDR0           0x5555
  68 #define ADDR1           0x2aaa
  69 #define FLASH_WORD_SIZE unsigned short
  70 #endif
  71
  72 #define FALSE           0
  73 #define TRUE            1
  74
  75 /*-----------------------------------------------------------------------
  76  * Some CS switching routines:
  77  *
  78  * On PIP/MIP405 we have 3 (4) possible boot mode
  79  *
  80  * - Boot from Flash (Flash CS = CS0, MPS CS = CS1)
  81  * - Boot from MPS   (Flash CS = CS1, MPS CS = CS0)
  82  * - Boot from PCI with Flash map (Flash CS = CS0, MPS CS = CS1)
  83  * - Boot from PCI with MPS map   (Flash CS = CS1, MPS CS = CS0)
  84  * The flash init is the first board specific routine which is called
  85  * after code relocation (running from SDRAM)
  86  * The first thing we do is to map the Flash CS to the Flash area and
  87  * the MPS CS to the MPS area. Since the flash size is unknown at this
  88  * point, we use the max flash size and the lowest flash address as base.
  89  *
  90  * After flash detection we adjust the size of the CS area accordingly.
  91  * The board_init_r will fill in wrong values in the board init structure,
  92  * but this will be fixed in the misc_init_r routine:
  93  * bd->bi_flashstart=0-flash_info[0].size
  94  * bd->bi_flashsize=flash_info[0].size-CFG_MONITOR_LEN
  95  * bd->bi_flashoffset=0
  96  *
  97  */
  98 int get_boot_mode(void)
  99 {
 100         unsigned long pbcr;
 101         int res = 0;
 102         pbcr = mfdcr (strap);
 103         if ((pbcr & PSR_ROM_WIDTH_MASK) == 0)
 104                 /* boot via MPS or MPS mapping */
 105                 res = BOOT_MPS;
 106         if(pbcr & PSR_ROM_LOC)
 107                 /* boot via PCI.. */
 108                 res |= BOOT_PCI;
 109          return res;
 110 }
 111
 112 /* Map the flash high (in boot area)
 113    This code can only be executed from SDRAM (after relocation).
 114 */
 115 void setup_cs_reloc(void)
 116 {
 117         int mode;
 118         /* Since we are relocated, we can set-up the CS finaly
 119          * but first of all, switch off PCI mapping (in case it was a PCI boot) */
 120         out32r(PMM0MA,0L);
 121         icache_enable (); /* we are relocated */
 122         /* get boot mode */
 123         mode=get_boot_mode();
 124         /* we map the flash high in every case */
 125         /* first findout on which cs the flash is */
 126         if(mode & BOOT_MPS) {
 127                 /* map flash high on CS1 and MPS on CS0 */
 128                 mtdcr (ebccfga, pb0ap);
 129                 mtdcr (ebccfgd, MPS_AP);
 130                 mtdcr (ebccfga, pb0cr);
 131                 mtdcr (ebccfgd, MPS_CR);
 132                 /* we use the default values (max values) for the flash
 133                  * because its real size is not yet known */
 134                 mtdcr (ebccfga, pb1ap);
 135                 mtdcr (ebccfgd, FLASH_AP);
 136                 mtdcr (ebccfga, pb1cr);
 137                 mtdcr (ebccfgd, FLASH_CR_B);
 138         }
 139         else {
 140                 /* map flash high on CS0 and MPS on CS1 */
 141                 mtdcr (ebccfga, pb1ap);
 142                 mtdcr (ebccfgd, MPS_AP);
 143                 mtdcr (ebccfga, pb1cr);
 144                 mtdcr (ebccfgd, MPS_CR);
 145                 /* we use the default values (max values) for the flash
 146                  * because its real size is not yet known */
 147                 mtdcr (ebccfga, pb0ap);
 148                 mtdcr (ebccfgd, FLASH_AP);
 149                 mtdcr (ebccfga, pb0cr);
 150                 mtdcr (ebccfgd, FLASH_CR_B);
 151         }
 152 }
 153
 154
 155
 156 unsigned long flash_init (void)
 157 {
 158         unsigned long size_b0, size_b1,flashcr, size_reg;
 159         int mode, i;
 160         extern char version_string;
 161         char *p=&version_string;
 162
 163         /* Since we are relocated, we can set-up the CS finally */
 164         setup_cs_reloc();
 165         /* get and display boot mode */
 166         mode=get_boot_mode();
 167         if(mode & BOOT_PCI)
 168                 printf("(PCI Boot %s Map) ",(mode & BOOT_MPS) ?
 169                         "MPS" : "Flash");
 170         else
 171                 printf("(%s Boot) ",(mode & BOOT_MPS) ?
 172                         "MPS" : "Flash");
 173         /* Init: no FLASHes known */
 174         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
 175                 flash_info[i].flash_id = FLASH_UNKNOWN;
 176         }
 177
 178         /* Static FLASH Bank configuration here - FIXME XXX */
 179
 180         size_b0 = flash_get_size((vu_long *)CFG_MONITOR_BASE, &flash_info[0]);
 181
 182         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
 183                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 184                         size_b0, size_b0<<20);
 185         }
 186         /* protect the bootloader */
 187         /* Monitor protection ON by default */
 188 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 189         flash_protect(FLAG_PROTECT_SET,
 190                         CFG_MONITOR_BASE,
 191                         CFG_MONITOR_BASE+monitor_flash_len-1,
 192                         &flash_info[0]);
 193 #endif
 194         /* protect reset vector */
 195         flash_info[0].protect[flash_info[0].sector_count-1] = 1;
 196         size_b1 = 0 ;
 197         flash_info[0].size = size_b0;
 198         /* set up flash cs according to the size */
 199         size_reg=(flash_info[0].size >>20);
 200         switch (size_reg) {
 201                 case 0:
 202                 case 1: i=0; break; /* <= 1MB */
 203                 case 2: i=1; break; /* = 2MB */
 204                 case 4: i=2; break; /* = 4MB */
 205                 case 8: i=3; break; /* = 8MB */
 206                 case 16: i=4; break; /* = 16MB */
 207                 case 32: i=5; break; /* = 32MB */
 208                 case 64: i=6; break; /* = 64MB */
 209                 case 128: i=7; break; /*= 128MB */
 210                 default:
 211                         printf("\n #### ERROR, wrong size %ld MByte reset board #####\n",size_reg);
 212                         while(1);
 213         }
 214         if(mode & BOOT_MPS) {
 215                 /* flash is on CS1 */
 216                 mtdcr(ebccfga, pb1cr);
 217                 flashcr = mfdcr (ebccfgd);
 218                 /* we map the flash high in every case */
 219                 flashcr&=0x0001FFFF; /* mask out address bits */
 220                 flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
 221                 flashcr|= (i << 17); /* size addr */
 222                 mtdcr(ebccfga, pb1cr);
 223                 mtdcr(ebccfgd, flashcr);
 224         }
 225         else {
 226                 /* flash is on CS0 */
 227                 mtdcr(ebccfga, pb0cr);
 228                 flashcr = mfdcr (ebccfgd);
 229                 /* we map the flash high in every case */
 230                 flashcr&=0x0001FFFF; /* mask out address bits */
 231                 flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
 232                 flashcr|= (i << 17); /* size addr */
 233                 mtdcr(ebccfga, pb0cr);
 234                 mtdcr(ebccfgd, flashcr);
 235         }
 236 #if 0
 237         /* enable this if you want to test if
 238            the relocation has be done ok.
 239            This will disable both Chipselects */
 240         mtdcr (ebccfga, pb0cr);
 241         mtdcr (ebccfgd, 0L);
 242         mtdcr (ebccfga, pb1cr);
 243         mtdcr (ebccfgd, 0L);
 244         printf("CS0 & CS1 switched off for test\n");
 245 #endif
 246         /* patch version_string */
 247         for(i=0;i<0x100;i++) {
 248                 if(*p=='\n') {
 249                         *p=0;
 250                         break;
 251                 }
 252                 p++;
 253         }
 254         return (size_b0);
 255 }
 256
 257
 258 /*-----------------------------------------------------------------------
 259  */
 260 void flash_print_info  (flash_info_t *info)
 261 {
 262         int i;
 263         int k;
 264         int size;
 265         int erased;
 266         volatile unsigned long *flash;
 267
 268         if (info->flash_id == FLASH_UNKNOWN) {
 269                 printf ("missing or unknown FLASH type\n");
 270                 return;
 271         }
 272
 273         switch (info->flash_id & FLASH_VENDMASK) {
 274         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 275         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 276         case FLASH_MAN_SST:     printf ("SST ");                break;
 277         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 278         default:                printf ("Unknown Vendor ");     break;
 279         }
 280
 281         switch (info->flash_id & FLASH_TYPEMASK) {
 282         case FLASH_AM040:       printf ("AM29F040 (512 Kbit, uniform sector size)\n");
 283                                 break;
 284         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 285                                 break;
 286         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 287                                 break;
 288         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 289                                 break;
 290         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 291                                 break;
 292         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 293                                 break;
 294         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 295                                 break;
 296         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 297                                 break;
 298         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 299                                 break;
 300         case FLASH_SST800A:     printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
 301                                 break;
 302         case FLASH_SST160A:     printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
 303                                 break;
 304         case FLASH_INTEL320T:   printf ("TE28F320C3 (32 Mbit, top sector size)\n");
 305                                 break;
 306         case FLASH_AM640U:      printf ("AM29LV640U (64 Mbit, uniform sector size)\n");
 307                                 break;
 308         default:                printf ("Unknown Chip Type\n");
 309                                 break;
 310         }
 311
 312         printf ("  Size: %ld KB in %d Sectors\n",
 313                 info->size >> 10, info->sector_count);
 314
 315         printf ("  Sector Start Addresses:");
 316         for (i=0; i<info->sector_count; ++i) {
 317                 /*
 318                  * Check if whole sector is erased
 319                 */
 320                 if (i != (info->sector_count-1))
 321                         size = info->start[i+1] - info->start[i];
 322                 else
 323                         size = info->start[0] + info->size - info->start[i];
 324                 erased = 1;
 325                 flash = (volatile unsigned long *)info->start[i];
 326                 size = size >> 2;        /* divide by 4 for longword access */
 327                 for (k=0; k<size; k++) {
 328                         if (*flash++ != 0xffffffff) {
 329                                 erased = 0;
 330                                 break;
 331                         }
 332                 }
 333                 if ((i % 5) == 0)
 334                         printf ("\n   ");
 335                 printf (" %08lX%s%s",
 336                         info->start[i],
 337                         erased ? " E" : "  ",
 338                         info->protect[i] ? "RO " : "   ");
 339         }
 340         printf ("\n");
 341 }
 342
 343 /*-----------------------------------------------------------------------
 344  */
 345
 346
 347 /*-----------------------------------------------------------------------
 348
 349 */
 350
 351 /*
 352  * The following code cannot be run from FLASH!
 353  */
 354 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 355 {
 356         short i;
 357         FLASH_WORD_SIZE value;
 358         ulong base;
 359         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
 360
 361         /* Write auto select command: read Manufacturer ID */
 362         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 363         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 364         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
 365
 366         value = addr2[0];
 367         /*      printf("flash_get_size value: %x\n",value); */
 368         switch (value) {
 369         case (FLASH_WORD_SIZE)AMD_MANUFACT:
 370                 info->flash_id = FLASH_MAN_AMD;
 371                 break;
 372         case (FLASH_WORD_SIZE)FUJ_MANUFACT:
 373                 info->flash_id = FLASH_MAN_FUJ;
 374                 break;
 375         case (FLASH_WORD_SIZE)INTEL_MANUFACT:
 376                 info->flash_id = FLASH_MAN_INTEL;
 377                 break;
 378         case (FLASH_WORD_SIZE)SST_MANUFACT:
 379                 info->flash_id = FLASH_MAN_SST;
 380                 break;
 381         default:
 382                 info->flash_id = FLASH_UNKNOWN;
 383                 info->sector_count = 0;
 384                 info->size = 0;
 385                 return (0);                     /* no or unknown flash  */
 386         }
 387         value = addr2[1];                       /* device ID            */
 388         /*      printf("Device value %x\n",value);                  */
 389         switch (value) {
 390         case (FLASH_WORD_SIZE)AMD_ID_F040B:
 391                 info->flash_id += FLASH_AM040;
 392                 info->sector_count = 8;
 393                 info->size = 0x0080000; /* => 512 ko */
 394                 break;
 395         case (FLASH_WORD_SIZE)AMD_ID_LV400T:
 396                 info->flash_id += FLASH_AM400T;
 397                 info->sector_count = 11;
 398                 info->size = 0x00080000;
 399                 break;                          /* => 0.5 MB            */
 400
 401         case (FLASH_WORD_SIZE)AMD_ID_LV400B:
 402                 info->flash_id += FLASH_AM400B;
 403                 info->sector_count = 11;
 404                 info->size = 0x00080000;
 405                 break;                          /* => 0.5 MB            */
 406
 407         case (FLASH_WORD_SIZE)AMD_ID_LV800T:
 408                 info->flash_id += FLASH_AM800T;
 409                 info->sector_count = 19;
 410                 info->size = 0x00100000;
 411                 break;                          /* => 1 MB              */
 412
 413         case (FLASH_WORD_SIZE)AMD_ID_LV800B:
 414                 info->flash_id += FLASH_AM800B;
 415                 info->sector_count = 19;
 416                 info->size = 0x00100000;
 417                 break;                          /* => 1 MB              */
 418
 419         case (FLASH_WORD_SIZE)AMD_ID_LV160T:
 420                 info->flash_id += FLASH_AM160T;
 421                 info->sector_count = 35;
 422                 info->size = 0x00200000;
 423                 break;                          /* => 2 MB              */
 424
 425         case (FLASH_WORD_SIZE)AMD_ID_LV160B:
 426                 info->flash_id += FLASH_AM160B;
 427                 info->sector_count = 35;
 428                 info->size = 0x00200000;
 429                 break;                          /* => 2 MB              */
 430         case (FLASH_WORD_SIZE)AMD_ID_LV320T:
 431                 info->flash_id += FLASH_AM320T;
 432                 info->sector_count = 67;
 433                 info->size = 0x00400000;
 434                 break;                          /* => 4 MB              */
 435         case (FLASH_WORD_SIZE)AMD_ID_LV640U:
 436                 info->flash_id += FLASH_AM640U;
 437                 info->sector_count = 128;
 438                 info->size = 0x00800000;
 439                 break;                          /* => 8 MB              */
 440 #if 0   /* enable when device IDs are available */
 441
 442         case (FLASH_WORD_SIZE)AMD_ID_LV320B:
 443                 info->flash_id += FLASH_AM320B;
 444                 info->sector_count = 67;
 445                 info->size = 0x00400000;
 446                 break;                          /* => 4 MB              */
 447 #endif
 448         case (FLASH_WORD_SIZE)SST_ID_xF800A:
 449                 info->flash_id += FLASH_SST800A;
 450                 info->sector_count = 16;
 451                 info->size = 0x00100000;
 452                 break;                          /* => 1 MB              */
 453         case (FLASH_WORD_SIZE)INTEL_ID_28F320C3T:
 454                 info->flash_id += FLASH_INTEL320T;
 455                 info->sector_count = 71;
 456                 info->size = 0x00400000;
 457                 break;                          /* => 4 MB              */
 458
 459
 460         case (FLASH_WORD_SIZE)SST_ID_xF160A:
 461                 info->flash_id += FLASH_SST160A;
 462                 info->sector_count = 32;
 463                 info->size = 0x00200000;
 464                 break;                          /* => 2 MB              */
 465
 466         default:
 467                 info->flash_id = FLASH_UNKNOWN;
 468                 return (0);                     /* => no or unknown flash */
 469
 470         }
 471         /* base address calculation */
 472         base=0-info->size;
 473         /* set up sector start address table */
 474         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 475              (info->flash_id  == FLASH_AM040) ||
 476              (info->flash_id  == FLASH_AM640U)){
 477                 for (i = 0; i < info->sector_count; i++)
 478                         info->start[i] = base + (i * 0x00010000);
 479         }
 480         else {
 481                 if (info->flash_id & FLASH_BTYPE) {
 482                         /* set sector offsets for bottom boot block type        */
 483                         info->start[0] = base + 0x00000000;
 484                         info->start[1] = base + 0x00004000;
 485                         info->start[2] = base + 0x00006000;
 486                         info->start[3] = base + 0x00008000;
 487                         for (i = 4; i < info->sector_count; i++)
 488                                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 489                 }
 490                 else {
 491                         /* set sector offsets for top boot block type           */
 492                         i = info->sector_count - 1;
 493                         if(info->sector_count==71) {
 494
 495                                 info->start[i--] = base + info->size - 0x00002000;
 496                                 info->start[i--] = base + info->size - 0x00004000;
 497                                 info->start[i--] = base + info->size - 0x00006000;
 498                                 info->start[i--] = base + info->size - 0x00008000;
 499                                 info->start[i--] = base + info->size - 0x0000A000;
 500                                 info->start[i--] = base + info->size - 0x0000C000;
 501                                 info->start[i--] = base + info->size - 0x0000E000;
 502                                 for (; i >= 0; i--)
 503                                         info->start[i] = base + i * 0x000010000;
 504                         }
 505                         else {
 506                                 info->start[i--] = base + info->size - 0x00004000;
 507                                 info->start[i--] = base + info->size - 0x00006000;
 508                                 info->start[i--] = base + info->size - 0x00008000;
 509                                 for (; i >= 0; i--)
 510                                         info->start[i] = base + i * 0x00010000;
 511                         }
 512                 }
 513         }
 514
 515         /* check for protected sectors */
 516         for (i = 0; i < info->sector_count; i++) {
 517                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 518                 /* D0 = 1 if protected */
 519                 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
 520                 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
 521                         info->protect[i] = 0;
 522                 else
 523                         info->protect[i] = addr2[2] & 1;
 524         }
 525
 526         /*
 527          * Prevent writes to uninitialized FLASH.
 528          */
 529         if (info->flash_id != FLASH_UNKNOWN) {
 530                 addr2 = (FLASH_WORD_SIZE *)info->start[0];
 531                 *addr2 = (FLASH_WORD_SIZE)0x00F000F0;   /* reset bank */
 532         }
 533         return (info->size);
 534 }
 535
 536
 537 int wait_for_DQ7(flash_info_t *info, int sect)
 538 {
 539         ulong start, now, last;
 540         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 541
 542         start = get_timer (0);
 543         last  = start;
 544         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 545                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 546                         printf ("Timeout\n");
 547                         return -1;
 548                 }
 549                 /* show that we're waiting */
 550                 if ((now - last) > 1000) {  /* every second */
 551                         putc ('.');
 552                         last = now;
 553                 }
 554         }
 555         return 0;
 556 }
 557
 558 int intel_wait_for_DQ7(flash_info_t *info, int sect)
 559 {
 560         ulong start, now, last;
 561         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
 562
 563         start = get_timer (0);
 564         last  = start;
 565         while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
 566                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 567                         printf ("Timeout\n");
 568                         return -1;
 569                 }
 570                 /* show that we're waiting */
 571                 if ((now - last) > 1000) {  /* every second */
 572                         putc ('.');
 573                         last = now;
 574                 }
 575         }
 576         addr[0]=(FLASH_WORD_SIZE)0x00500050;
 577         return 0;
 578 }
 579
 580 /*-----------------------------------------------------------------------
 581  */
 582
 583 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 584 {
 585         volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
 586         volatile FLASH_WORD_SIZE *addr2;
 587         int flag, prot, sect, l_sect;
 588         int i;
 589
 590
 591         if ((s_first < 0) || (s_first > s_last)) {
 592                 if (info->flash_id == FLASH_UNKNOWN) {
 593                         printf ("- missing\n");
 594                 } else {
 595                         printf ("- no sectors to erase\n");
 596                 }
 597                 return 1;
 598         }
 599
 600         if (info->flash_id == FLASH_UNKNOWN) {
 601                 printf ("Can't erase unknown flash type - aborted\n");
 602                 return 1;
 603         }
 604
 605         prot = 0;
 606         for (sect=s_first; sect<=s_last; ++sect) {
 607                 if (info->protect[sect]) {
 608                         prot++;
 609                 }
 610         }
 611
 612         if (prot) {
 613                 printf ("- Warning: %d protected sectors will not be erased!\n",
 614                         prot);
 615         } else {
 616                 printf ("\n");
 617         }
 618
 619         l_sect = -1;
 620
 621         /* Disable interrupts which might cause a timeout here */
 622         flag = disable_interrupts();
 623
 624         /* Start erase on unprotected sectors */
 625         for (sect = s_first; sect<=s_last; sect++) {
 626                 if (info->protect[sect] == 0) { /* not protected */
 627                         addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
 628                         /*  printf("Erasing sector %p\n", addr2); */ /* CLH */
 629                         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
 630                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 631                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 632                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 633                                 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 634                                 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 635                                 addr2[0] = (FLASH_WORD_SIZE)0x00500050;  /* block erase */
 636                                 for (i=0; i<50; i++)
 637                                         udelay(1000);  /* wait 1 ms */
 638                                 wait_for_DQ7(info, sect);
 639                         }
 640                         else {
 641                                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 642                                         addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector */
 643                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 644                                         intel_wait_for_DQ7(info, sect);
 645                                         addr2[0] = (FLASH_WORD_SIZE)0x00200020;  /* sector erase */
 646                                         addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* sector erase */
 647                                         intel_wait_for_DQ7(info, sect);
 648                                 }
 649                                 else {
 650                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 651                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 652                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
 653                                         addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 654                                         addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 655                                         addr2[0] = (FLASH_WORD_SIZE)0x00300030;  /* sector erase */
 656                                         wait_for_DQ7(info, sect);
 657                                 }
 658                         }
 659                         l_sect = sect;
 660                         /*
 661                          * Wait for each sector to complete, it's more
 662                          * reliable.  According to AMD Spec, you must
 663                          * issue all erase commands within a specified
 664                          * timeout.  This has been seen to fail, especially
 665                          * if printf()s are included (for debug)!!
 666                          */
 667                         /*   wait_for_DQ7(info, sect); */
 668                 }
 669         }
 670
 671         /* re-enable interrupts if necessary */
 672         if (flag)
 673                 enable_interrupts();
 674
 675         /* wait at least 80us - let's wait 1 ms */
 676         udelay (1000);
 677
 678 #if 0
 679         /*
 680          * We wait for the last triggered sector
 681          */
 682         if (l_sect < 0)
 683                 goto DONE;
 684         wait_for_DQ7(info, l_sect);
 685
 686 DONE:
 687 #endif
 688         /* reset to read mode */
 689         addr = (FLASH_WORD_SIZE *)info->start[0];
 690         addr[0] = (FLASH_WORD_SIZE)0x00F000F0;  /* reset bank */
 691
 692         printf (" done\n");
 693         return 0;
 694 }
 695
 696
 697 void unlock_intel_sectors(flash_info_t *info,ulong addr,ulong cnt)
 698 {
 699         int i;
 700         volatile FLASH_WORD_SIZE *addr2;
 701         long c;
 702         c= (long)cnt;
 703         for(i=info->sector_count-1;i>0;i--)
 704         {
 705                 if(addr>=info->start[i])
 706                         break;
 707         }
 708         do {
 709                 addr2 = (FLASH_WORD_SIZE *)(info->start[i]);
 710                 addr2[0] = (FLASH_WORD_SIZE)0x00600060;  /* unlock sector setup */
 711                 addr2[0] = (FLASH_WORD_SIZE)0x00D000D0;  /* unlock sector */
 712                 intel_wait_for_DQ7(info, i);
 713                 i++;
 714                 c-=(info->start[i]-info->start[i-1]);
 715         }while(c>0);
 716 }
 717
 718
 719 /*-----------------------------------------------------------------------
 720  * Copy memory to flash, returns:
 721  * 0 - OK
 722  * 1 - write timeout
 723  * 2 - Flash not erased
 724  */
 725
 726 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 727 {
 728         ulong cp, wp, data;
 729         int i, l, rc;
 730
 731         if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 732                 unlock_intel_sectors(info,addr,cnt);
 733         }
 734         wp = (addr & ~3);       /* get lower word aligned address */
 735         /*
 736          * handle unaligned start bytes
 737          */
 738         if ((l = addr - wp) != 0) {
 739                 data = 0;
 740                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 741                         data = (data << 8) | (*(uchar *)cp);
 742                 }
 743                 for (; i<4 && cnt>0; ++i) {
 744                         data = (data << 8) | *src++;
 745                         --cnt;
 746                         ++cp;
 747                 }
 748                 for (; cnt==0 && i<4; ++i, ++cp) {
 749                         data = (data << 8) | (*(uchar *)cp);
 750                 }
 751
 752                 if ((rc = write_word(info, wp, data)) != 0) {
 753                         return (rc);
 754                 }
 755                 wp += 4;
 756         }
 757
 758         /*
 759          * handle word aligned part
 760          */
 761         while (cnt >= 4) {
 762                 data = 0;
 763                 for (i=0; i<4; ++i) {
 764                         data = (data << 8) | *src++;
 765                 }
 766                 if ((rc = write_word(info, wp, data)) != 0) {
 767                         return (rc);
 768                 }
 769                 wp  += 4;
 770                 if((wp % 0x10000)==0)
 771                         printf("."); /* show Progress */
 772                 cnt -= 4;
 773         }
 774
 775         if (cnt == 0) {
 776                 return (0);
 777         }
 778
 779         /*
 780          * handle unaligned tail bytes
 781          */
 782         data = 0;
 783         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 784                 data = (data << 8) | *src++;
 785                 --cnt;
 786         }
 787         for (; i<4; ++i, ++cp) {
 788                 data = (data << 8) | (*(uchar *)cp);
 789         }
 790         rc=write_word(info, wp, data);
 791         return rc;
 792 }
 793
 794 /*-----------------------------------------------------------------------
 795  * Write a word to Flash, returns:
 796  * 0 - OK
 797  * 1 - write timeout
 798  * 2 - Flash not erased
 799  */
 800 static FLASH_WORD_SIZE *read_val = (FLASH_WORD_SIZE *)0x200000;
 801
 802 static int write_word (flash_info_t *info, ulong dest, ulong data)
 803 {
 804         volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
 805         volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
 806         volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
 807         ulong start;
 808         int flag;
 809         int i;
 810
 811         /* Check if Flash is (sufficiently) erased */
 812         if ((*((volatile FLASH_WORD_SIZE *)dest) &
 813                 (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
 814                 return (2);
 815         }
 816         /* Disable interrupts which might cause a timeout here */
 817         flag = disable_interrupts();
 818         for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
 819         {
 820                 if((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL){
 821                         /* intel style writting */
 822                         dest2[i] = (FLASH_WORD_SIZE)0x00500050;
 823                         dest2[i] = (FLASH_WORD_SIZE)0x00400040;
 824                         *read_val++ = data2[i];
 825                         dest2[i] = data2[i];
 826                         if (flag)
 827                                 enable_interrupts();
 828                         /* data polling for D7 */
 829                         start = get_timer (0);
 830                         udelay(10);
 831                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080)
 832                         {
 833                                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
 834                                         return (1);
 835                         }
 836                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 837                         udelay(10);
 838                         dest2[i] = (FLASH_WORD_SIZE)0x00FF00FF; /* return to read mode */
 839                         if(dest2[i]!=data2[i])
 840                                 printf("Error at %p 0x%04X != 0x%04X\n",&dest2[i],dest2[i],data2[i]);
 841                 }
 842                 else {
 843                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
 844                         addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
 845                         addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
 846                         dest2[i] = data2[i];
 847                         /* re-enable interrupts if necessary */
 848                         if (flag)
 849                                 enable_interrupts();
 850                         /* data polling for D7 */
 851                         start = get_timer (0);
 852                         while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
 853                                 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
 854                                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 855                                         return (1);
 856                                 }
 857                         }
 858                 }
 859         }
 860         return (0);
 861 }
 862
 863 /*-----------------------------------------------------------------------
 864  */