board/ezkit533/flash.c

   1 /*
   2  * U-boot - flash.c Flash driver for PSD4256GV
   3  *
   4  * Copyright (c) 2005 blackfin.uclinux.org
   5  * This file is based on BF533EzFlash.c originally written by Analog Devices, Inc.
   6  *
   7  * (C) Copyright 2000-2004
   8  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   9  *
  10  * See file CREDITS for list of people who contributed to this
  11  * project.
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation; either version 2 of
  16  * the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  26  * MA 02111-1307 USA
  27  */
  28
  29 #include "flash-defines.h"
  30
  31 void flash_reset(void)
  32 {
  33         reset_flash();
  34 }
  35
  36 unsigned long flash_get_size(ulong baseaddr, flash_info_t * info,
  37                              int bank_flag)
  38 {
  39         int id = 0, i = 0;
  40         static int FlagDev = 1;
  41
  42         id = get_codes();
  43         if(FlagDev)     {
  44 #ifdef DEBUG
  45                 printf("Device ID of the Flash is %x\n", id);
  46 #endif
  47                 FlagDev = 0;
  48         }
  49         info->flash_id = id;
  50
  51         switch (bank_flag) {
  52         case 0:
  53                 for (i = PriFlashABegin; i < SecFlashABegin; i++)
  54                         info->start[i] = (baseaddr + (i * AFP_SectorSize1));
  55                 info->size = 0x200000;
  56                 info->sector_count = 32;
  57                 break;
  58         case 1:
  59                 info->start[0] = baseaddr + SecFlashASec1Off;
  60                 info->start[1] = baseaddr + SecFlashASec2Off;
  61                 info->start[2] = baseaddr + SecFlashASec3Off;
  62                 info->start[3] = baseaddr + SecFlashASec4Off;
  63                 info->size = 0x10000;
  64                 info->sector_count = 4;
  65                 break;
  66         case 2:
  67                 info->start[0] = baseaddr + SecFlashBSec1Off;
  68                 info->start[1] = baseaddr + SecFlashBSec2Off;
  69                 info->start[2] = baseaddr + SecFlashBSec3Off;
  70                 info->start[3] = baseaddr + SecFlashBSec4Off;
  71                 info->size = 0x10000;
  72                 info->sector_count = 4;
  73                 break;
  74         }
  75         return (info->size);
  76 }
  77
  78 unsigned long flash_init(void)
  79 {
  80         unsigned long size_b0, size_b1, size_b2;
  81         int i;
  82
  83         size_b0 = size_b1 = size_b2 = 0;
  84 #ifdef DEBUG
  85         printf("Flash Memory Start 0x%x\n", CFG_FLASH_BASE);
  86         printf("Memory Map for the Flash\n");
  87         printf("0x20000000 - 0x200FFFFF Flash A Primary (1MB)\n");
  88         printf("0x20100000 - 0x201FFFFF Flash B Primary (1MB)\n");
  89         printf("0x20200000 - 0x2020FFFF Flash A Secondary (64KB)\n");
  90         printf("0x20280000 - 0x2028FFFF Flash B Secondary (64KB)\n");
  91         printf("Please type command flinfo for information on Sectors \n");
  92 #endif
  93         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
  94                 flash_info[i].flash_id = FLASH_UNKNOWN;
  95         }
  96
  97         size_b0 = flash_get_size(CFG_FLASH0_BASE, &flash_info[0], 0);
  98         size_b1 = flash_get_size(CFG_FLASH0_BASE, &flash_info[1], 1);
  99         size_b2 = flash_get_size(CFG_FLASH0_BASE, &flash_info[2], 2);
 100
 101         if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
 102                 printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 103                         size_b0, size_b0 >> 20);
 104         }
 105
 106         (void)flash_protect(FLAG_PROTECT_SET,CFG_FLASH0_BASE,(flash_info[0].start[2] - 1),&flash_info[0]);
 107
 108         return (size_b0 + size_b1 + size_b2);
 109 }
 110
 111 void flash_print_info(flash_info_t * info)
 112 {
 113         int i;
 114
 115         if (info->flash_id == FLASH_UNKNOWN) {
 116                 printf("missing or unknown FLASH type\n");
 117                 return;
 118         }
 119
 120         switch (info->flash_id) {
 121         case FLASH_PSD4256GV:
 122                 printf("ST Microelectronics ");
 123                 break;
 124         default:
 125                 printf("Unknown Vendor ");
 126                 break;
 127         }
 128         for (i = 0; i < info->sector_count; ++i) {
 129                 if ((i % 5) == 0)
 130                         printf("\n   ");
 131                 printf(" %08lX%s",
 132                         info->start[i],
 133                         info->protect[i] ? " (RO)" : "     ");
 134         }
 135         printf("\n");
 136         return;
 137 }
 138
 139 int flash_erase(flash_info_t * info, int s_first, int s_last)
 140 {
 141         int cnt = 0,i;
 142         int prot,sect;
 143
 144         prot = 0;
 145         for (sect = s_first; sect <= s_last; ++sect) {
 146                 if (info->protect[sect])
 147                         prot++;
 148         }
 149
 150         if (prot)
 151                 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
 152         else
 153                 printf ("\n");
 154
 155         cnt = s_last - s_first + 1;
 156
 157         if (cnt == FLASH_TOT_SECT) {
 158                 printf("Erasing flash, Please Wait \n");
 159                 if(erase_flash() < 0) {
 160                         printf("Erasing flash failed \n");
 161                         return FLASH_FAIL;
 162                 }
 163         } else {
 164                 printf("Erasing Flash locations, Please Wait\n");
 165                 for (i = s_first; i <= s_last; i++) {
 166                         if (info->protect[i] == 0) {    /* not protected */
 167                                 if(erase_block_flash(i, info->start[i]) < 0) {
 168                                         printf("Error Sector erasing \n");
 169                                         return FLASH_FAIL;
 170                                 }
 171                         }
 172                 }
 173         }
 174         return FLASH_SUCCESS;
 175 }
 176
 177 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 178 {
 179         int ret;
 180
 181         ret = write_data(addr, cnt, 1, (int *) src);
 182         if(ret == FLASH_FAIL)
 183                 return ERR_NOT_ERASED;
 184         return FLASH_SUCCESS;
 185 }
 186
 187
 188 int write_data(long lStart, long lCount, long lStride, int *pnData)
 189 {
 190         long i = 0;
 191         int j = 0;
 192         unsigned long ulOffset = lStart - CFG_FLASH_BASE;
 193         int d;
 194         int iShift = 0;
 195         int iNumWords = 2;
 196         int nLeftover = lCount % 4;
 197         int nSector = 0;
 198
 199         for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
 200                 for (iShift = 0, j = 0; (j < iNumWords);
 201                         j++, ulOffset += (lStride * 2)) {
 202                         if ((ulOffset >= INVALIDLOCNSTART)
 203                         && (ulOffset < INVALIDLOCNEND)) {
 204                                 printf("Invalid locations, Try writing to another location \n");
 205                                 return FLASH_FAIL;
 206                         }
 207                         get_sector_number(ulOffset, &nSector);
 208                         read_flash(ulOffset,&d);
 209                         if(d != 0xffff) {
 210                                 printf("Flash not erased at offset 0x%x Please erase to reprogram \n",ulOffset);
 211                                 return FLASH_FAIL;
 212                         }
 213                         unlock_flash(ulOffset);
 214                         if(write_flash(ulOffset, (pnData[i] >> iShift)) < 0) {
 215                                 printf("Error programming the flash \n");
 216                                 return FLASH_FAIL;
 217                         }
 218                         iShift += 16;
 219                 }
 220         }
 221         if (nLeftover > 0) {
 222                 if ((ulOffset >= INVALIDLOCNSTART)
 223                         && (ulOffset < INVALIDLOCNEND))
 224                                 return FLASH_FAIL;
 225                 get_sector_number(ulOffset, &nSector);
 226                 read_flash(ulOffset,&d);
 227                 if(d != 0xffff) {
 228                         printf("Flash already programmed. Please erase to reprogram \n");
 229                         printf("uloffset = 0x%x \t d = 0x%x\n",ulOffset,d);
 230                         return FLASH_FAIL;
 231                 }
 232                 unlock_flash(ulOffset);
 233                 if(write_flash(ulOffset, pnData[i]) < 0) {
 234                         printf("Error programming the flash \n");
 235                         return FLASH_FAIL;
 236                 }
 237         }
 238         return FLASH_SUCCESS;
 239 }
 240
 241 int read_data(long ulStart, long lCount, long lStride, int *pnData)
 242 {
 243         long i = 0;
 244         int j = 0;
 245         long ulOffset = ulStart;
 246         int iShift = 0;
 247         int iNumWords = 2;
 248         int nLeftover = lCount % 4;
 249         int nHi, nLow;
 250         int nSector = 0;
 251
 252         for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
 253                 for (iShift = 0, j = 0; j < iNumWords; j += 2) {
 254                         if ((ulOffset >= INVALIDLOCNSTART)
 255                                 && (ulOffset < INVALIDLOCNEND))
 256                                         return FLASH_FAIL;
 257
 258                         get_sector_number(ulOffset, &nSector);
 259                         read_flash(ulOffset, &nLow);
 260                         ulOffset += (lStride * 2);
 261                         read_flash(ulOffset, &nHi);
 262                         ulOffset += (lStride * 2);
 263                         pnData[i] = (nHi << 16) | nLow;
 264                 }
 265         }
 266         if (nLeftover > 0) {
 267                 if ((ulOffset >= INVALIDLOCNSTART)
 268                         && (ulOffset < INVALIDLOCNEND))
 269                                 return FLASH_FAIL;
 270
 271                 get_sector_number(ulOffset, &nSector);
 272                 read_flash(ulOffset, &pnData[i]);
 273         }
 274         return FLASH_SUCCESS;
 275 }
 276
 277 int write_flash(long nOffset, int nValue)
 278 {
 279         long addr;
 280
 281         addr = (CFG_FLASH_BASE + nOffset);
 282         asm("ssync;");
 283         *(unsigned volatile short *) addr = nValue;
 284         asm("ssync;");
 285         if(poll_toggle_bit(nOffset) < 0)
 286                 return FLASH_FAIL;
 287         return FLASH_SUCCESS;
 288 }
 289
 290 int read_flash(long nOffset, int *pnValue)
 291 {
 292         int nValue = 0x0;
 293         long addr = (CFG_FLASH_BASE + nOffset);
 294
 295         if (nOffset != 0x2)
 296                 reset_flash();
 297         asm("ssync;");
 298         nValue = *(volatile unsigned short *) addr;
 299         asm("ssync;");
 300         *pnValue = nValue;
 301         return TRUE;
 302 }
 303
 304 int poll_toggle_bit(long lOffset)
 305 {
 306         unsigned int u1,u2;
 307         unsigned long timeout = 0xFFFFFFFF;
 308         volatile unsigned long *FB = (volatile unsigned long *)(0x20000000 + lOffset);
 309         while(1) {
 310                 if(timeout < 0)
 311                         break;
 312                 u1 = *(volatile unsigned short *)FB;
 313                 u2 = *(volatile unsigned short *)FB;
 314                 if((u1 & 0x0040) == (u2 & 0x0040))
 315                         return FLASH_SUCCESS;
 316                 if((u2 & 0x0020) == 0x0000)
 317                         continue;
 318                 u1 = *(volatile unsigned short *)FB;
 319                 if((u2 & 0x0040) == (u1 & 0x0040))
 320                         return FLASH_SUCCESS;
 321                 else {
 322                         reset_flash();
 323                         return FLASH_FAIL;
 324                 }
 325                 timeout--;
 326         }
 327         printf("Time out occured \n");
 328         if(timeout <0)  return FLASH_FAIL;
 329 }
 330
 331 void reset_flash(void)
 332 {
 333         write_flash(WRITESEQ1, RESET_VAL);
 334         /* Wait for 10 micro seconds */
 335         udelay(10);
 336 }
 337
 338 int erase_flash(void)
 339 {
 340         write_flash(WRITESEQ1, WRITEDATA1);
 341         write_flash(WRITESEQ2, WRITEDATA2);
 342         write_flash(WRITESEQ3, WRITEDATA3);
 343         write_flash(WRITESEQ4, WRITEDATA4);
 344         write_flash(WRITESEQ5, WRITEDATA5);
 345         write_flash(WRITESEQ6, WRITEDATA6);
 346
 347         if(poll_toggle_bit(0x0000) < 0)
 348                 return FLASH_FAIL;
 349
 350         write_flash(SecFlashAOff + WRITESEQ1, WRITEDATA1);
 351         write_flash(SecFlashAOff + WRITESEQ2, WRITEDATA2);
 352         write_flash(SecFlashAOff + WRITESEQ3, WRITEDATA3);
 353         write_flash(SecFlashAOff + WRITESEQ4, WRITEDATA4);
 354         write_flash(SecFlashAOff + WRITESEQ5, WRITEDATA5);
 355         write_flash(SecFlashAOff + WRITESEQ6, WRITEDATA6);
 356
 357         if(poll_toggle_bit(SecFlashASec1Off) < 0)
 358                 return FLASH_FAIL;
 359
 360         write_flash(PriFlashBOff + WRITESEQ1, WRITEDATA1);
 361         write_flash(PriFlashBOff + WRITESEQ2, WRITEDATA2);
 362         write_flash(PriFlashBOff + WRITESEQ3, WRITEDATA3);
 363         write_flash(PriFlashBOff + WRITESEQ4, WRITEDATA4);
 364         write_flash(PriFlashBOff + WRITESEQ5, WRITEDATA5);
 365         write_flash(PriFlashBOff + WRITESEQ6, WRITEDATA6);
 366
 367         if(poll_toggle_bit(PriFlashBOff) <0)
 368                 return FLASH_FAIL;
 369
 370         write_flash(SecFlashBOff + WRITESEQ1, WRITEDATA1);
 371         write_flash(SecFlashBOff + WRITESEQ2, WRITEDATA2);
 372         write_flash(SecFlashBOff + WRITESEQ3, WRITEDATA3);
 373         write_flash(SecFlashBOff + WRITESEQ4, WRITEDATA4);
 374         write_flash(SecFlashBOff + WRITESEQ5, WRITEDATA5);
 375         write_flash(SecFlashBOff + WRITESEQ6, WRITEDATA6);
 376
 377         if(poll_toggle_bit(SecFlashBOff) < 0)
 378                 return FLASH_FAIL;
 379
 380         return FLASH_SUCCESS;
 381 }
 382
 383 int erase_block_flash(int nBlock, unsigned long address)
 384 {
 385         long ulSectorOff = 0x0;
 386
 387         if ((nBlock < 0) || (nBlock > AFP_NumSectors))
 388                 return FALSE;
 389
 390         ulSectorOff = (address - CFG_FLASH_BASE);
 391
 392         write_flash((WRITESEQ1 | ulSectorOff), WRITEDATA1);
 393         write_flash((WRITESEQ2 | ulSectorOff), WRITEDATA2);
 394         write_flash((WRITESEQ3 | ulSectorOff), WRITEDATA3);
 395         write_flash((WRITESEQ4 | ulSectorOff), WRITEDATA4);
 396         write_flash((WRITESEQ5 | ulSectorOff), WRITEDATA5);
 397
 398         write_flash(ulSectorOff, BlockEraseVal);
 399
 400         if(poll_toggle_bit(ulSectorOff) < 0)
 401                 return FLASH_FAIL;
 402
 403         return FLASH_SUCCESS;
 404 }
 405
 406 void unlock_flash(long ulOffset)
 407 {
 408         unsigned long ulOffsetAddr = ulOffset;
 409         ulOffsetAddr &= 0xFFFF0000;
 410
 411         write_flash((WRITESEQ1 | ulOffsetAddr), UNLOCKDATA1);
 412         write_flash((WRITESEQ2 | ulOffsetAddr), UNLOCKDATA2);
 413         write_flash((WRITESEQ3 | ulOffsetAddr), UNLOCKDATA3);
 414 }
 415
 416 int get_codes()
 417 {
 418         int dev_id = 0;
 419
 420         write_flash(WRITESEQ1, GETCODEDATA1);
 421         write_flash(WRITESEQ2, GETCODEDATA2);
 422         write_flash(WRITESEQ3, GETCODEDATA3);
 423
 424         read_flash(0x0002, &dev_id);
 425         dev_id &= 0x00FF;
 426
 427         reset_flash();
 428
 429         return dev_id;
 430 }
 431
 432 void get_sector_number(long ulOffset, int *pnSector)
 433 {
 434         int nSector = 0;
 435
 436         if (ulOffset >= SecFlashAOff) {
 437                 if ((ulOffset < SecFlashASec1Off)
 438                         && (ulOffset < SecFlashASec2Off)) {
 439                                 nSector = SECT32;
 440                 } else if ((ulOffset >= SecFlashASec2Off)
 441                         && (ulOffset < SecFlashASec3Off)) {
 442                                 nSector = SECT33;
 443                 } else if ((ulOffset >= SecFlashASec3Off)
 444                         && (ulOffset < SecFlashASec4Off)) {
 445                                 nSector = SECT34;
 446                 } else if ((ulOffset >= SecFlashASec4Off)
 447                         && (ulOffset < SecFlashAEndOff)) {
 448                                 nSector = SECT35;
 449                 }
 450         } else if (ulOffset >= SecFlashBOff) {
 451                 if ((ulOffset < SecFlashBSec1Off)
 452                         && (ulOffset < SecFlashBSec2Off)) {
 453                                 nSector = SECT36;
 454                 }
 455                 if ((ulOffset < SecFlashBSec2Off)
 456                         && (ulOffset < SecFlashBSec3Off)) {
 457                                 nSector = SECT37;
 458                 }
 459                 if ((ulOffset < SecFlashBSec3Off)
 460                         && (ulOffset < SecFlashBSec4Off)) {
 461                                 nSector = SECT38;
 462                 }
 463                 if ((ulOffset < SecFlashBSec4Off)
 464                         && (ulOffset < SecFlashBEndOff)) {
 465                                 nSector = SECT39;
 466                 }
 467         } else if ((ulOffset >= PriFlashAOff) && (ulOffset < SecFlashAOff)) {
 468                 nSector = ulOffset & 0xffff0000;
 469                 nSector = ulOffset >> 16;
 470                 nSector = nSector & 0x000ff;
 471         }
 472
 473         if ((nSector >= 0) && (nSector < AFP_NumSectors)) {
 474                 *pnSector = nSector;
 475         }
 476 }