board/smdk2400/flash.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * (C) Copyright 2002
   7  * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /* #define DEBUG */
  29
  30 #include <common.h>
  31 #include <environment.h>
  32
  33 #define FLASH_BANK_SIZE 0x1000000       /* 2 x   8 MB */
  34 #define MAIN_SECT_SIZE  0x40000         /* 2 x 128 kB */
  35
  36 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
  37
  38
  39 #define CMD_READ_ARRAY          0x00FF00FF
  40 #define CMD_IDENTIFY            0x00900090
  41 #define CMD_ERASE_SETUP         0x00200020
  42 #define CMD_ERASE_CONFIRM       0x00D000D0
  43 #define CMD_PROGRAM             0x00400040
  44 #define CMD_RESUME              0x00D000D0
  45 #define CMD_SUSPEND             0x00B000B0
  46 #define CMD_STATUS_READ         0x00700070
  47 #define CMD_STATUS_RESET        0x00500050
  48
  49 #define BIT_BUSY                0x00800080
  50 #define BIT_ERASE_SUSPEND       0x00400040
  51 #define BIT_ERASE_ERROR         0x00200020
  52 #define BIT_PROGRAM_ERROR       0x00100010
  53 #define BIT_VPP_RANGE_ERROR     0x00080008
  54 #define BIT_PROGRAM_SUSPEND     0x00040004
  55 #define BIT_PROTECT_ERROR       0x00020002
  56 #define BIT_UNDEFINED           0x00010001
  57
  58 #define BIT_SEQUENCE_ERROR      0x00300030
  59 #define BIT_TIMEOUT             0x80000000
  60
  61 /*-----------------------------------------------------------------------
  62  */
  63
  64 ulong flash_init (void)
  65 {
  66         int i, j;
  67         ulong size = 0;
  68
  69         for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
  70                 ulong flashbase = 0;
  71
  72                 flash_info[i].flash_id =
  73                         (INTEL_MANUFACT     & FLASH_VENDMASK) |
  74                         (INTEL_ID_28F640J3A & FLASH_TYPEMASK);
  75                 flash_info[i].size = FLASH_BANK_SIZE;
  76                 flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
  77                 memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
  78                 if (i == 0)
  79                         flashbase = CFG_FLASH_BASE;
  80                 else
  81                         panic ("configured too many flash banks!\n");
  82                 for (j = 0; j < flash_info[i].sector_count; j++) {
  83                         flash_info[i].start[j] = flashbase;
  84
  85                         /* uniform sector size */
  86                         flashbase += MAIN_SECT_SIZE;
  87                 }
  88                 size += flash_info[i].size;
  89         }
  90
  91         /*
  92          * Protect monitor and environment sectors
  93          */
  94         flash_protect ( FLAG_PROTECT_SET,
  95                         CFG_FLASH_BASE,
  96                         CFG_FLASH_BASE + monitor_flash_len - 1,
  97                         &flash_info[0]);
  98
  99         flash_protect ( FLAG_PROTECT_SET,
 100                         CFG_ENV_ADDR,
 101                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
 102
 103 #ifdef CFG_ENV_ADDR_REDUND
 104         flash_protect ( FLAG_PROTECT_SET,
 105                         CFG_ENV_ADDR_REDUND,
 106                         CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
 107                         &flash_info[0]);
 108 #endif
 109
 110         return size;
 111 }
 112
 113 /*-----------------------------------------------------------------------
 114  */
 115 void flash_print_info (flash_info_t * info)
 116 {
 117         int i;
 118
 119         switch (info->flash_id & FLASH_VENDMASK) {
 120         case (INTEL_MANUFACT & FLASH_VENDMASK):
 121                 printf ("Intel: ");
 122                 break;
 123         default:
 124                 printf ("Unknown Vendor ");
 125                 break;
 126         }
 127
 128         switch (info->flash_id & FLASH_TYPEMASK) {
 129         case (INTEL_ID_28F640J3A & FLASH_TYPEMASK):
 130                 printf ("2x 28F640J3A (64Mbit)\n");
 131                 break;
 132         default:
 133                 printf ("Unknown Chip Type\n");
 134                 goto Done;
 135                 break;
 136         }
 137
 138         printf ("  Size: %ld MB in %d Sectors\n",
 139                         info->size >> 20, info->sector_count);
 140
 141         printf ("  Sector Start Addresses:");
 142         for (i = 0; i < info->sector_count; i++) {
 143                 if ((i % 5) == 0) {
 144                         printf ("\n   ");
 145                 }
 146                 printf (" %08lX%s",
 147                         info->start[i],
 148                         info->protect[i] ? " (RO)" : "     ");
 149         }
 150         printf ("\n");
 151
 152 Done:   ;
 153 }
 154
 155 /*-----------------------------------------------------------------------
 156  */
 157
 158 int flash_error (ulong code)
 159 {
 160         /* Check bit patterns */
 161         /* SR.7=0 is busy, SR.7=1 is ready */
 162         /* all other flags indicate error on 1 */
 163         /* SR.0 is undefined */
 164         /* Timeout is our faked flag */
 165
 166         /* sequence is described in Intel 290644-005 document */
 167
 168         /* check Timeout */
 169         if (code & BIT_TIMEOUT) {
 170                 puts ("Timeout\n");
 171                 return ERR_TIMOUT;
 172         }
 173
 174         /* check Busy, SR.7 */
 175         if (~code & BIT_BUSY) {
 176                 puts ("Busy\n");
 177                 return ERR_PROG_ERROR;
 178         }
 179
 180         /* check Vpp low, SR.3 */
 181         if (code & BIT_VPP_RANGE_ERROR) {
 182                 puts ("Vpp range error\n");
 183                 return ERR_PROG_ERROR;
 184         }
 185
 186         /* check Device Protect Error, SR.1 */
 187         if (code & BIT_PROTECT_ERROR) {
 188                 puts ("Device protect error\n");
 189                 return ERR_PROG_ERROR;
 190         }
 191
 192         /* check Command Seq Error, SR.4 & SR.5 */
 193         if (code & BIT_SEQUENCE_ERROR) {
 194                 puts ("Command seqence error\n");
 195                 return ERR_PROG_ERROR;
 196         }
 197
 198         /* check Block Erase Error, SR.5 */
 199         if (code & BIT_ERASE_ERROR) {
 200                 puts ("Block erase error\n");
 201                 return ERR_PROG_ERROR;
 202         }
 203
 204         /* check Program Error, SR.4 */
 205         if (code & BIT_PROGRAM_ERROR) {
 206                 puts ("Program error\n");
 207                 return ERR_PROG_ERROR;
 208         }
 209
 210         /* check Block Erase Suspended, SR.6 */
 211         if (code & BIT_ERASE_SUSPEND) {
 212                 puts ("Block erase suspended\n");
 213                 return ERR_PROG_ERROR;
 214         }
 215
 216         /* check Program Suspended, SR.2 */
 217         if (code & BIT_PROGRAM_SUSPEND) {
 218                 puts ("Program suspended\n");
 219                 return ERR_PROG_ERROR;
 220         }
 221
 222         /* OK, no error */
 223         return ERR_OK;
 224 }
 225
 226 /*-----------------------------------------------------------------------
 227  */
 228
 229 int flash_erase (flash_info_t * info, int s_first, int s_last)
 230 {
 231         ulong result, result1;
 232         int iflag, prot, sect;
 233         int rc = ERR_OK;
 234
 235 #ifdef USE_920T_MMU
 236         int cflag;
 237 #endif
 238
 239         debug ("flash_erase: s_first %d  s_last %d\n", s_first, s_last);
 240
 241         /* first look for protection bits */
 242
 243         if (info->flash_id == FLASH_UNKNOWN)
 244                 return ERR_UNKNOWN_FLASH_TYPE;
 245
 246         if ((s_first < 0) || (s_first > s_last)) {
 247                 return ERR_INVAL;
 248         }
 249
 250         if ((info->flash_id & FLASH_VENDMASK) !=
 251                 (INTEL_MANUFACT & FLASH_VENDMASK)) {
 252                 return ERR_UNKNOWN_FLASH_VENDOR;
 253         }
 254
 255         prot = 0;
 256         for (sect = s_first; sect <= s_last; ++sect) {
 257                 if (info->protect[sect]) {
 258                         prot++;
 259                 }
 260         }
 261
 262         if (prot) {
 263                 printf ("- Warning: %d protected sectors will not be erased!\n",
 264                         prot);
 265         } else {
 266                 printf ("\n");
 267         }
 268
 269         /*
 270          * Disable interrupts which might cause a timeout
 271          * here. Remember that our exception vectors are
 272          * at address 0 in the flash, and we don't want a
 273          * (ticker) exception to happen while the flash
 274          * chip is in programming mode.
 275          */
 276 #ifdef USE_920T_MMU
 277         cflag = dcache_status ();
 278         dcache_disable ();
 279 #endif
 280         iflag = disable_interrupts ();
 281
 282         /* Start erase on unprotected sectors */
 283         for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 284
 285                 debug ("Erasing sector %2d @ %08lX... ",
 286                         sect, info->start[sect]);
 287
 288                 /* arm simple, non interrupt dependent timer */
 289                 reset_timer_masked ();
 290
 291                 if (info->protect[sect] == 0) { /* not protected */
 292                         vu_long *addr = (vu_long *) (info->start[sect]);
 293                         ulong bsR7, bsR7_2, bsR5, bsR5_2;
 294
 295                         /* *addr = CMD_STATUS_RESET; */
 296                         *addr = CMD_ERASE_SETUP;
 297                         *addr = CMD_ERASE_CONFIRM;
 298
 299                         /* wait until flash is ready */
 300                         do {
 301                                 /* check timeout */
 302                                 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
 303                                         *addr = CMD_STATUS_RESET;
 304                                         result = BIT_TIMEOUT;
 305                                         break;
 306                                 }
 307
 308                                 *addr = CMD_STATUS_READ;
 309                                 result = *addr;
 310                                 bsR7 = result & (1 << 7);
 311                                 bsR7_2 = result & (1 << 23);
 312                         } while (!bsR7 | !bsR7_2);
 313
 314                         *addr = CMD_STATUS_READ;
 315                         result1 = *addr;
 316                         bsR5 = result1 & (1 << 5);
 317                         bsR5_2 = result1 & (1 << 21);
 318 #ifdef SAMSUNG_FLASH_DEBUG
 319                         printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
 320                         if (bsR5 != 0 && bsR5_2 != 0)
 321                                 printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
 322 #endif
 323
 324                         *addr = CMD_READ_ARRAY;
 325                         *addr = CMD_RESUME;
 326
 327                         if ((rc = flash_error (result)) != ERR_OK)
 328                                 goto outahere;
 329 #if 0
 330                         printf ("ok.\n");
 331                 } else {                /* it was protected */
 332
 333                         printf ("protected!\n");
 334 #endif
 335                 }
 336         }
 337
 338 outahere:
 339         /* allow flash to settle - wait 10 ms */
 340         udelay_masked (10000);
 341
 342         if (iflag)
 343                 enable_interrupts ();
 344
 345 #ifdef USE_920T_MMU
 346         if (cflag)
 347                 dcache_enable ();
 348 #endif
 349         return rc;
 350 }
 351
 352 /*-----------------------------------------------------------------------
 353  * Copy memory to flash
 354  */
 355
 356 static int write_word (flash_info_t * info, ulong dest, ulong data)
 357 {
 358         vu_long *addr = (vu_long *) dest;
 359         ulong result;
 360         int rc = ERR_OK;
 361         int iflag;
 362
 363 #ifdef USE_920T_MMU
 364         int cflag;
 365 #endif
 366
 367         /*
 368          * Check if Flash is (sufficiently) erased
 369          */
 370         result = *addr;
 371         if ((result & data) != data)
 372                 return ERR_NOT_ERASED;
 373
 374         /*
 375          * Disable interrupts which might cause a timeout
 376          * here. Remember that our exception vectors are
 377          * at address 0 in the flash, and we don't want a
 378          * (ticker) exception to happen while the flash
 379          * chip is in programming mode.
 380          */
 381 #ifdef USE_920T_MMU
 382         cflag = dcache_status ();
 383         dcache_disable ();
 384 #endif
 385         iflag = disable_interrupts ();
 386
 387         /* *addr = CMD_STATUS_RESET; */
 388         *addr = CMD_PROGRAM;
 389         *addr = data;
 390
 391         /* arm simple, non interrupt dependent timer */
 392         reset_timer_masked ();
 393
 394         /* wait until flash is ready */
 395         do {
 396                 /* check timeout */
 397                 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
 398                         *addr = CMD_SUSPEND;
 399                         result = BIT_TIMEOUT;
 400                         break;
 401                 }
 402
 403                 *addr = CMD_STATUS_READ;
 404                 result = *addr;
 405         } while (~result & BIT_BUSY);
 406
 407         /* *addr = CMD_READ_ARRAY; */
 408         *addr = CMD_STATUS_READ;
 409         result = *addr;
 410
 411         rc = flash_error (result);
 412
 413         if (iflag)
 414                 enable_interrupts ();
 415
 416 #ifdef USE_920T_MMU
 417         if (cflag)
 418                 dcache_enable ();
 419 #endif
 420         *addr = CMD_READ_ARRAY;
 421         *addr = CMD_RESUME;
 422         return rc;
 423 }
 424
 425 /*-----------------------------------------------------------------------
 426  * Copy memory to flash.
 427  */
 428
 429 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 430 {
 431         ulong cp, wp, data;
 432         int l;
 433         int i, rc;
 434
 435         wp = (addr & ~3);                       /* get lower word aligned address */
 436
 437         /*
 438          * handle unaligned start bytes
 439          */
 440         if ((l = addr - wp) != 0) {
 441                 data = 0;
 442                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 443                         data = (data >> 8) | (*(uchar *) cp << 24);
 444                 }
 445                 for (; i < 4 && cnt > 0; ++i) {
 446                         data = (data >> 8) | (*src++ << 24);
 447                         --cnt;
 448                         ++cp;
 449                 }
 450                 for (; cnt == 0 && i < 4; ++i, ++cp) {
 451                         data = (data >> 8) | (*(uchar *) cp << 24);
 452                 }
 453
 454                 if ((rc = write_word (info, wp, data)) != 0) {
 455                         return (rc);
 456                 }
 457                 wp += 4;
 458         }
 459
 460         /*
 461          * handle word aligned part
 462          */
 463         while (cnt >= 4) {
 464                 data = *((vu_long *) src);
 465                 if ((rc = write_word (info, wp, data)) != 0) {
 466                         return (rc);
 467                 }
 468                 src += 4;
 469                 wp += 4;
 470                 cnt -= 4;
 471         }
 472
 473         if (cnt == 0) {
 474                 return ERR_OK;
 475         }
 476
 477         /*
 478          * handle unaligned tail bytes
 479          */
 480         data = 0;
 481         for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
 482                 data = (data >> 8) | (*src++ << 24);
 483                 --cnt;
 484         }
 485         for (; i < 4; ++i, ++cp) {
 486                 data = (data >> 8) | (*(uchar *) cp << 24);
 487         }
 488
 489         return write_word (info, wp, data);
 490 }