board/bf533-ezkit/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 <asm/io.h>
  30 #include "flash-defines.h"
  31
  32 void flash_reset(void)
  33 {
  34         reset_flash();
  35 }
  36
  37 unsigned long flash_get_size(ulong baseaddr, flash_info_t * info, 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,
 107                             (flash_info[0].start[2] - 1), &flash_info[0]);
 108
 109         return (size_b0 + size_b1 + size_b2);
 110 }
 111
 112 void flash_print_info(flash_info_t * info)
 113 {
 114         int i;
 115
 116         if (info->flash_id == FLASH_UNKNOWN) {
 117                 printf("missing or unknown FLASH type\n");
 118                 return;
 119         }
 120
 121         switch (info->flash_id) {
 122         case FLASH_PSD4256GV:
 123                 printf("ST Microelectronics ");
 124                 break;
 125         default:
 126                 printf("Unknown Vendor: (0x%08X) ", info->flash_id);
 127                 break;
 128         }
 129         for (i = 0; i < info->sector_count; ++i) {
 130                 if ((i % 5) == 0)
 131                         printf("\n   ");
 132                 printf(" %08lX%s",
 133                        info->start[i], 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",
 152                        prot);
 153         else
 154                 printf("\n");
 155
 156         cnt = s_last - s_first + 1;
 157
 158         if (cnt == FLASH_TOT_SECT) {
 159                 printf("Erasing flash, Please Wait \n");
 160                 if (erase_flash() < 0) {
 161                         printf("Erasing flash failed \n");
 162                         return FLASH_FAIL;
 163                 }
 164         } else {
 165                 printf("Erasing Flash locations, Please Wait\n");
 166                 for (i = s_first; i <= s_last; i++) {
 167                         if (info->protect[i] == 0) {    /* not protected */
 168                                 if (erase_block_flash(i, info->start[i]) < 0) {
 169                                         printf("Error Sector erasing \n");
 170                                         return FLASH_FAIL;
 171                                 }
 172                         }
 173                 }
 174         }
 175         return FLASH_SUCCESS;
 176 }
 177
 178 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 179 {
 180         int ret;
 181
 182         ret = write_data(addr, cnt, 1, (int *)src);
 183         if (ret == FLASH_FAIL)
 184                 return ERR_NOT_ERASED;
 185         return FLASH_SUCCESS;
 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
 205                                     ("Invalid locations, Try writing to another location \n");
 206                                 return FLASH_FAIL;
 207                         }
 208                         get_sector_number(ulOffset, &nSector);
 209                         read_flash(ulOffset, &d);
 210                         if (d != 0xffff) {
 211                                 printf
 212                                     ("Flash not erased at offset 0x%x Please erase to reprogram \n",
 213                                      ulOffset);
 214                                 return FLASH_FAIL;
 215                         }
 216                         unlock_flash(ulOffset);
 217                         if (write_flash(ulOffset, (pnData[i] >> iShift)) < 0) {
 218                                 printf("Error programming the flash \n");
 219                                 return FLASH_FAIL;
 220                         }
 221                         iShift += 16;
 222                 }
 223         }
 224         if (nLeftover > 0) {
 225                 if ((ulOffset >= INVALIDLOCNSTART)
 226                     && (ulOffset < INVALIDLOCNEND))
 227                         return FLASH_FAIL;
 228                 get_sector_number(ulOffset, &nSector);
 229                 read_flash(ulOffset, &d);
 230                 if (d != 0xffff) {
 231                         printf
 232                             ("Flash already programmed. Please erase to reprogram \n");
 233                         printf("uloffset = 0x%x \t d = 0x%x\n", ulOffset, d);
 234                         return FLASH_FAIL;
 235                 }
 236                 unlock_flash(ulOffset);
 237                 if (write_flash(ulOffset, pnData[i]) < 0) {
 238                         printf("Error programming the flash \n");
 239                         return FLASH_FAIL;
 240                 }
 241         }
 242         return FLASH_SUCCESS;
 243 }
 244
 245 int read_data(long ulStart, long lCount, long lStride, int *pnData)
 246 {
 247         long i = 0;
 248         int j = 0;
 249         long ulOffset = ulStart;
 250         int iShift = 0;
 251         int iNumWords = 2;
 252         int nLeftover = lCount % 4;
 253         int nHi, nLow;
 254         int nSector = 0;
 255
 256         for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
 257                 for (iShift = 0, j = 0; j < iNumWords; j += 2) {
 258                         if ((ulOffset >= INVALIDLOCNSTART)
 259                             && (ulOffset < INVALIDLOCNEND))
 260                                 return FLASH_FAIL;
 261
 262                         get_sector_number(ulOffset, &nSector);
 263                         read_flash(ulOffset, &nLow);
 264                         ulOffset += (lStride * 2);
 265                         read_flash(ulOffset, &nHi);
 266                         ulOffset += (lStride * 2);
 267                         pnData[i] = (nHi << 16) | nLow;
 268                 }
 269         }
 270         if (nLeftover > 0) {
 271                 if ((ulOffset >= INVALIDLOCNSTART)
 272                     && (ulOffset < INVALIDLOCNEND))
 273                         return FLASH_FAIL;
 274
 275                 get_sector_number(ulOffset, &nSector);
 276                 read_flash(ulOffset, &pnData[i]);
 277         }
 278         return FLASH_SUCCESS;
 279 }
 280
 281 int write_flash(long nOffset, int nValue)
 282 {
 283         long addr;
 284
 285         addr = (CFG_FLASH_BASE + nOffset);
 286         sync();
 287         *(unsigned volatile short *)addr = nValue;
 288         sync();
 289         if (poll_toggle_bit(nOffset) < 0)
 290                 return FLASH_FAIL;
 291         return FLASH_SUCCESS;
 292 }
 293
 294 int read_flash(long nOffset, int *pnValue)
 295 {
 296         int nValue = 0x0;
 297         long addr = (CFG_FLASH_BASE + nOffset);
 298
 299         if (nOffset != 0x2)
 300                 reset_flash();
 301         sync();
 302         nValue = *(volatile unsigned short *)addr;
 303         sync();
 304         *pnValue = nValue;
 305         return TRUE;
 306 }
 307
 308 int poll_toggle_bit(long lOffset)
 309 {
 310         unsigned int u1, u2;
 311         unsigned long timeout = 0xFFFFFFFF;
 312         volatile unsigned long *FB =
 313             (volatile unsigned long *)(0x20000000 + lOffset);
 314         while (1) {
 315                 if (timeout < 0)
 316                         break;
 317                 u1 = *(volatile unsigned short *)FB;
 318                 u2 = *(volatile unsigned short *)FB;
 319                 if ((u1 & 0x0040) == (u2 & 0x0040))
 320                         return FLASH_SUCCESS;
 321                 if ((u2 & 0x0020) == 0x0000)
 322                         continue;
 323                 u1 = *(volatile unsigned short *)FB;
 324                 if ((u2 & 0x0040) == (u1 & 0x0040))
 325                         return FLASH_SUCCESS;
 326                 else {
 327                         reset_flash();
 328                         return FLASH_FAIL;
 329                 }
 330                 timeout--;
 331         }
 332         printf("Time out occured \n");
 333         if (timeout < 0)
 334                 return FLASH_FAIL;
 335 }
 336
 337 void reset_flash(void)
 338 {
 339         write_flash(WRITESEQ1, RESET_VAL);
 340         /* Wait for 10 micro seconds */
 341         udelay(10);
 342 }
 343
 344 int erase_flash(void)
 345 {
 346         write_flash(WRITESEQ1, WRITEDATA1);
 347         write_flash(WRITESEQ2, WRITEDATA2);
 348         write_flash(WRITESEQ3, WRITEDATA3);
 349         write_flash(WRITESEQ4, WRITEDATA4);
 350         write_flash(WRITESEQ5, WRITEDATA5);
 351         write_flash(WRITESEQ6, WRITEDATA6);
 352
 353         if (poll_toggle_bit(0x0000) < 0)
 354                 return FLASH_FAIL;
 355
 356         write_flash(SecFlashAOff + WRITESEQ1, WRITEDATA1);
 357         write_flash(SecFlashAOff + WRITESEQ2, WRITEDATA2);
 358         write_flash(SecFlashAOff + WRITESEQ3, WRITEDATA3);
 359         write_flash(SecFlashAOff + WRITESEQ4, WRITEDATA4);
 360         write_flash(SecFlashAOff + WRITESEQ5, WRITEDATA5);
 361         write_flash(SecFlashAOff + WRITESEQ6, WRITEDATA6);
 362
 363         if (poll_toggle_bit(SecFlashASec1Off) < 0)
 364                 return FLASH_FAIL;
 365
 366         write_flash(PriFlashBOff + WRITESEQ1, WRITEDATA1);
 367         write_flash(PriFlashBOff + WRITESEQ2, WRITEDATA2);
 368         write_flash(PriFlashBOff + WRITESEQ3, WRITEDATA3);
 369         write_flash(PriFlashBOff + WRITESEQ4, WRITEDATA4);
 370         write_flash(PriFlashBOff + WRITESEQ5, WRITEDATA5);
 371         write_flash(PriFlashBOff + WRITESEQ6, WRITEDATA6);
 372
 373         if (poll_toggle_bit(PriFlashBOff) < 0)
 374                 return FLASH_FAIL;
 375
 376         write_flash(SecFlashBOff + WRITESEQ1, WRITEDATA1);
 377         write_flash(SecFlashBOff + WRITESEQ2, WRITEDATA2);
 378         write_flash(SecFlashBOff + WRITESEQ3, WRITEDATA3);
 379         write_flash(SecFlashBOff + WRITESEQ4, WRITEDATA4);
 380         write_flash(SecFlashBOff + WRITESEQ5, WRITEDATA5);
 381         write_flash(SecFlashBOff + WRITESEQ6, WRITEDATA6);
 382
 383         if (poll_toggle_bit(SecFlashBOff) < 0)
 384                 return FLASH_FAIL;
 385
 386         return FLASH_SUCCESS;
 387 }
 388
 389 int erase_block_flash(int nBlock, unsigned long address)
 390 {
 391         long ulSectorOff = 0x0;
 392
 393         if ((nBlock < 0) || (nBlock > AFP_NumSectors))
 394                 return FALSE;
 395
 396         ulSectorOff = (address - CFG_FLASH_BASE);
 397
 398         write_flash((WRITESEQ1 | ulSectorOff), WRITEDATA1);
 399         write_flash((WRITESEQ2 | ulSectorOff), WRITEDATA2);
 400         write_flash((WRITESEQ3 | ulSectorOff), WRITEDATA3);
 401         write_flash((WRITESEQ4 | ulSectorOff), WRITEDATA4);
 402         write_flash((WRITESEQ5 | ulSectorOff), WRITEDATA5);
 403
 404         write_flash(ulSectorOff, BlockEraseVal);
 405
 406         if (poll_toggle_bit(ulSectorOff) < 0)
 407                 return FLASH_FAIL;
 408
 409         return FLASH_SUCCESS;
 410 }
 411
 412 void unlock_flash(long ulOffset)
 413 {
 414         unsigned long ulOffsetAddr = ulOffset;
 415         ulOffsetAddr &= 0xFFFF0000;
 416
 417         write_flash((WRITESEQ1 | ulOffsetAddr), UNLOCKDATA1);
 418         write_flash((WRITESEQ2 | ulOffsetAddr), UNLOCKDATA2);
 419         write_flash((WRITESEQ3 | ulOffsetAddr), UNLOCKDATA3);
 420 }
 421
 422 int get_codes()
 423 {
 424         int dev_id = 0;
 425
 426         write_flash(WRITESEQ1, GETCODEDATA1);
 427         write_flash(WRITESEQ2, GETCODEDATA2);
 428         write_flash(WRITESEQ3, GETCODEDATA3);
 429
 430         read_flash(0x0002, &dev_id);
 431         dev_id &= 0x00FF;
 432
 433         reset_flash();
 434
 435         return dev_id;
 436 }
 437
 438 void get_sector_number(long ulOffset, int *pnSector)
 439 {
 440         int nSector = 0;
 441
 442         if (ulOffset >= SecFlashAOff) {
 443                 if ((ulOffset < SecFlashASec1Off)
 444                     && (ulOffset < SecFlashASec2Off)) {
 445                         nSector = SECT32;
 446                 } else if ((ulOffset >= SecFlashASec2Off)
 447                            && (ulOffset < SecFlashASec3Off)) {
 448                         nSector = SECT33;
 449                 } else if ((ulOffset >= SecFlashASec3Off)
 450                            && (ulOffset < SecFlashASec4Off)) {
 451                         nSector = SECT34;
 452                 } else if ((ulOffset >= SecFlashASec4Off)
 453                            && (ulOffset < SecFlashAEndOff)) {
 454                         nSector = SECT35;
 455                 }
 456         } else if (ulOffset >= SecFlashBOff) {
 457                 if ((ulOffset < SecFlashBSec1Off)
 458                     && (ulOffset < SecFlashBSec2Off)) {
 459                         nSector = SECT36;
 460                 }
 461                 if ((ulOffset < SecFlashBSec2Off)
 462                     && (ulOffset < SecFlashBSec3Off)) {
 463                         nSector = SECT37;
 464                 }
 465                 if ((ulOffset < SecFlashBSec3Off)
 466                     && (ulOffset < SecFlashBSec4Off)) {
 467                         nSector = SECT38;
 468                 }
 469                 if ((ulOffset < SecFlashBSec4Off)
 470                     && (ulOffset < SecFlashBEndOff)) {
 471                         nSector = SECT39;
 472                 }
 473         } else if ((ulOffset >= PriFlashAOff) && (ulOffset < SecFlashAOff)) {
 474                 nSector = ulOffset & 0xffff0000;
 475                 nSector = ulOffset >> 16;
 476                 nSector = nSector & 0x000ff;
 477         }
 478
 479         if ((nSector >= 0) && (nSector < AFP_NumSectors)) {
 480                 *pnSector = nSector;
 481         }
 482 }