board/ip860/flash.c

   1 /*
   2  * (C) Copyright 2000
   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 #include <common.h>
  25 #include <mpc8xx.h>
  26
  27 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
  28
  29 #if defined(CFG_ENV_IS_IN_FLASH)
  30 # ifndef  CFG_ENV_ADDR
  31 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  32 # endif
  33 # ifndef  CFG_ENV_SIZE
  34 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  35 # endif
  36 # ifndef  CFG_ENV_SECT_SIZE
  37 #  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
  38 # endif
  39 #endif
  40
  41 /*-----------------------------------------------------------------------
  42  * Functions
  43  */
  44 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  45 static int write_word (flash_info_t *info, ulong dest, ulong data);
  46 static void flash_get_offsets (ulong base, flash_info_t *info);
  47
  48 /*-----------------------------------------------------------------------
  49  */
  50
  51 unsigned long flash_init (void)
  52 {
  53         volatile immap_t        *immap  = (immap_t *)CFG_IMMR;
  54         volatile memctl8xx_t    *memctl = &immap->im_memctl;
  55         volatile ip860_bcsr_t   *bcsr   = (ip860_bcsr_t *)BCSR_BASE;
  56         unsigned long size;
  57         int i;
  58
  59         /* Init: enable write,
  60          * or we cannot even write flash commands
  61          */
  62         bcsr->bd_ctrl |= BD_CTRL_FLWE;
  63
  64         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  65                 flash_info[i].flash_id = FLASH_UNKNOWN;
  66         }
  67
  68         /* Static FLASH Bank configuration here - FIXME XXX */
  69
  70         size = flash_get_size((vu_long *)FLASH_BASE, &flash_info[0]);
  71
  72         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  73                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  74                         size, size<<20);
  75         }
  76
  77         /* Remap FLASH according to real size */
  78         memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  79         memctl->memc_br1 = (CFG_FLASH_BASE & BR_BA_MSK) |
  80                                 (memctl->memc_br1 & ~(BR_BA_MSK));
  81
  82         /* Re-do sizing to get full correct info */
  83         size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
  84
  85         flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
  86
  87         flash_info[0].size = size;
  88
  89 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
  90         /* monitor protection ON by default */
  91         flash_protect(FLAG_PROTECT_SET,
  92                       CFG_MONITOR_BASE,
  93                       CFG_MONITOR_BASE+monitor_flash_len-1,
  94                       &flash_info[0]);
  95 #endif
  96
  97 #ifdef  CFG_ENV_IS_IN_FLASH
  98         /* ENV protection ON by default */
  99         flash_protect(FLAG_PROTECT_SET,
 100                       CFG_ENV_ADDR,
 101                       CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
 102                       &flash_info[0]);
 103 #endif
 104         return (size);
 105 }
 106
 107 /*-----------------------------------------------------------------------
 108  */
 109 static void flash_get_offsets (ulong base, flash_info_t *info)
 110 {
 111         int i;
 112
 113         /* all possible flash types
 114          * (28F016SV, 28F160S3, 28F320S3)
 115          * have the same erase block size: 64 kB per chip,
 116          * of 128 kB per bank
 117          */
 118
 119         /* set up sector start address table */
 120         for (i = 0; i < info->sector_count; i++) {
 121                 info->start[i] = base;
 122                 base += 0x00020000;
 123         }
 124 }
 125
 126 /*-----------------------------------------------------------------------
 127  */
 128 void flash_print_info  (flash_info_t *info)
 129 {
 130         int i;
 131
 132         if (info->flash_id == FLASH_UNKNOWN) {
 133                 printf ("missing or unknown FLASH type\n");
 134                 return;
 135         }
 136
 137         switch (info->flash_id & FLASH_VENDMASK) {
 138         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
 139         default:                printf ("Unknown Vendor ");     break;
 140         }
 141
 142         switch (info->flash_id & FLASH_TYPEMASK) {
 143         case FLASH_28F016SV:    printf ("28F016SV (16 Mbit, 32 x 64k)\n");
 144                                 break;
 145         case FLASH_28F160S3:    printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
 146                                 break;
 147         case FLASH_28F320S3:    printf ("28F320S3 (32 Mbit, 64 x 512K)\n");
 148                                 break;
 149         default:                printf ("Unknown Chip Type\n");
 150                                 break;
 151         }
 152
 153         printf ("  Size: %ld MB in %d Sectors\n",
 154                 info->size >> 20, info->sector_count);
 155
 156         printf ("  Sector Start Addresses:");
 157         for (i=0; i<info->sector_count; ++i) {
 158                 if ((i % 5) == 0)
 159                         printf ("\n   ");
 160                 printf (" %08lX%s",
 161                         info->start[i],
 162                         info->protect[i] ? " (RO)" : "     "
 163                 );
 164         }
 165         printf ("\n");
 166         return;
 167 }
 168
 169 /*-----------------------------------------------------------------------
 170  */
 171
 172
 173 /*-----------------------------------------------------------------------
 174  */
 175
 176 /*
 177  * The following code cannot be run from FLASH!
 178  */
 179
 180 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 181 {
 182         short i;
 183         ulong value;
 184         ulong base = (ulong)addr;
 185
 186         /* Write "Intelligent Identifier" command: read Manufacturer ID */
 187         *addr = 0x90909090;
 188
 189         value = addr[0];
 190         switch (value) {
 191         case (MT_MANUFACT & 0x00FF00FF):        /* MT or => Intel */
 192         case (INTEL_ALT_MANU & 0x00FF00FF):
 193                 info->flash_id = FLASH_MAN_INTEL;
 194                 break;
 195         default:
 196                 info->flash_id = FLASH_UNKNOWN;
 197                 info->sector_count = 0;
 198                 info->size = 0;
 199                 return (0);                     /* no or unknown flash  */
 200         }
 201
 202         value = addr[1];                        /* device ID            */
 203
 204         switch (value) {
 205         case (INTEL_ID_28F016S):
 206                 info->flash_id += FLASH_28F016SV;
 207                 info->sector_count = 32;
 208                 info->size = 0x00400000;
 209                 break;                          /* => 2x2 MB            */
 210
 211         case (INTEL_ID_28F160S3):
 212                 info->flash_id += FLASH_28F160S3;
 213                 info->sector_count = 32;
 214                 info->size = 0x00400000;
 215                 break;                          /* => 2x2 MB            */
 216
 217         case (INTEL_ID_28F320S3):
 218                 info->flash_id += FLASH_28F320S3;
 219                 info->sector_count = 64;
 220                 info->size = 0x00800000;
 221                 break;                          /* => 2x4 MB            */
 222
 223         default:
 224                 info->flash_id = FLASH_UNKNOWN;
 225                 return (0);                     /* => no or unknown flash */
 226
 227         }
 228
 229         /* set up sector start address table */
 230         for (i = 0; i < info->sector_count; i++) {
 231                 info->start[i] = base + (i * 0x00020000);
 232                 /* don't know how to check sector protection */
 233                 info->protect[i] = 0;
 234         }
 235
 236         /*
 237          * Prevent writes to uninitialized FLASH.
 238          */
 239         if (info->flash_id != FLASH_UNKNOWN) {
 240                 addr = (vu_long *)info->start[0];
 241
 242                 *addr = 0xFFFFFF;       /* reset bank to read array mode */
 243         }
 244
 245         return (info->size);
 246 }
 247
 248
 249 /*-----------------------------------------------------------------------
 250  */
 251
 252 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 253 {
 254         int flag, prot, sect;
 255         ulong start, now, last;
 256
 257         if ((s_first < 0) || (s_first > s_last)) {
 258                 if (info->flash_id == FLASH_UNKNOWN) {
 259                         printf ("- missing\n");
 260                 } else {
 261                         printf ("- no sectors to erase\n");
 262                 }
 263                 return 1;
 264         }
 265
 266         if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
 267                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 268                         info->flash_id);
 269                 return 1;
 270         }
 271
 272         prot = 0;
 273         for (sect=s_first; sect<=s_last; ++sect) {
 274                 if (info->protect[sect]) {
 275                         prot++;
 276                 }
 277         }
 278
 279         if (prot) {
 280                 printf ("- Warning: %d protected sectors will not be erased!\n",
 281                         prot);
 282         } else {
 283                 printf ("\n");
 284         }
 285
 286         start = get_timer (0);
 287         last  = start;
 288
 289         /* Start erase on unprotected sectors */
 290         for (sect = s_first; sect<=s_last; sect++) {
 291                 if (info->protect[sect] == 0) { /* not protected */
 292                         vu_long *addr = (vu_long *)(info->start[sect]);
 293
 294                         /* Disable interrupts which might cause a timeout here */
 295                         flag = disable_interrupts();
 296
 297                         /* Single Block Erase Command */
 298                         *addr = 0x20202020;
 299                         /* Confirm */
 300                         *addr = 0xD0D0D0D0;
 301                         /* Resume Command, as per errata update */
 302                         *addr = 0xD0D0D0D0;
 303
 304                         /* re-enable interrupts if necessary */
 305                         if (flag)
 306                                 enable_interrupts();
 307
 308                         /* wait at least 80us - let's wait 1 ms */
 309                         udelay (1000);
 310
 311                         while ((*addr & 0x00800080) != 0x00800080) {
 312                                 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 313                                         printf ("Timeout\n");
 314                                         *addr = 0xFFFFFFFF;     /* reset bank */
 315                                         return 1;
 316                                 }
 317                                 /* show that we're waiting */
 318                                 if ((now - last) > 1000) {      /* every second */
 319                                         putc ('.');
 320                                         last = now;
 321                                 }
 322                         }
 323
 324                         /* reset to read mode */
 325                         *addr = 0xFFFFFFFF;
 326                 }
 327         }
 328
 329         printf (" done\n");
 330         return 0;
 331 }
 332
 333 /*-----------------------------------------------------------------------
 334  * Copy memory to flash, returns:
 335  * 0 - OK
 336  * 1 - write timeout
 337  * 2 - Flash not erased
 338  */
 339
 340 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 341 {
 342         ulong cp, wp, data;
 343         int i, l, rc;
 344
 345         wp = (addr & ~3);       /* get lower word aligned address */
 346
 347         /*
 348          * handle unaligned start bytes
 349          */
 350         if ((l = addr - wp) != 0) {
 351                 data = 0;
 352                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 353                         data = (data << 8) | (*(uchar *)cp);
 354                 }
 355                 for (; i<4 && cnt>0; ++i) {
 356                         data = (data << 8) | *src++;
 357                         --cnt;
 358                         ++cp;
 359                 }
 360                 for (; cnt==0 && i<4; ++i, ++cp) {
 361                         data = (data << 8) | (*(uchar *)cp);
 362                 }
 363
 364                 if ((rc = write_word(info, wp, data)) != 0) {
 365                         return (rc);
 366                 }
 367                 wp += 4;
 368         }
 369
 370         /*
 371          * handle word aligned part
 372          */
 373         while (cnt >= 4) {
 374                 data = 0;
 375                 for (i=0; i<4; ++i) {
 376                         data = (data << 8) | *src++;
 377                 }
 378                 if ((rc = write_word(info, wp, data)) != 0) {
 379                         return (rc);
 380                 }
 381                 wp  += 4;
 382                 cnt -= 4;
 383         }
 384
 385         if (cnt == 0) {
 386                 return (0);
 387         }
 388
 389         /*
 390          * handle unaligned tail bytes
 391          */
 392         data = 0;
 393         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 394                 data = (data << 8) | *src++;
 395                 --cnt;
 396         }
 397         for (; i<4; ++i, ++cp) {
 398                 data = (data << 8) | (*(uchar *)cp);
 399         }
 400
 401         return (write_word(info, wp, data));
 402 }
 403
 404 /*-----------------------------------------------------------------------
 405  * Write a word to Flash, returns:
 406  * 0 - OK
 407  * 1 - write timeout
 408  * 2 - Flash not erased
 409  */
 410 static int write_word (flash_info_t *info, ulong dest, ulong data)
 411 {
 412         vu_long *addr = (vu_long *)dest;
 413         ulong start, csr;
 414         int flag;
 415
 416         /* Check if Flash is (sufficiently) erased */
 417         if ((*addr & data) != data) {
 418                 return (2);
 419         }
 420         /* Disable interrupts which might cause a timeout here */
 421         flag = disable_interrupts();
 422
 423         /* Write Command */
 424         *addr = 0x10101010;
 425
 426         /* Write Data */
 427         *addr = data;
 428
 429         /* re-enable interrupts if necessary */
 430         if (flag)
 431                 enable_interrupts();
 432
 433         /* data polling for D7 */
 434         start = get_timer (0);
 435         flag  = 0;
 436         while (((csr = *addr) & 0x00800080) != 0x00800080) {
 437                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 438                         flag = 1;
 439                         break;
 440                 }
 441         }
 442         if (csr & 0x00400040) {
 443 printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
 444                 flag = 1;
 445         }
 446
 447         /* Clear Status Registers Command */
 448         *addr = 0x50505050;
 449         /* Reset to read array mode */
 450         *addr = 0xFFFFFFFF;
 451
 452         return (flag);
 453 }
 454
 455 /*-----------------------------------------------------------------------
 456  */