board/RRvision/flash.c

   1 /*
   2  * (C) Copyright 2000-2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #define DEBUG
   9
  10 #include <common.h>
  11 #include <mpc8xx.h>
  12
  13 #ifndef CONFIG_ENV_ADDR
  14 #define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  15 #endif
  16
  17 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  18
  19 /*-----------------------------------------------------------------------
  20  * Functions
  21  */
  22 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  23 static int write_word (flash_info_t *info, ulong dest, ulong data);
  24
  25 /*-----------------------------------------------------------------------
  26  */
  27
  28 unsigned long flash_init (void)
  29 {
  30         volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  31         volatile memctl8xx_t *memctl = &immap->im_memctl;
  32         unsigned long size;
  33         int i;
  34
  35         /* Init: no FLASHes known */
  36         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  37                 flash_info[i].flash_id = FLASH_UNKNOWN;
  38         }
  39
  40         /* Static FLASH Bank configuration here - FIXME XXX */
  41
  42         size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  43
  44         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  45                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  46                         size, size<<20);
  47         }
  48
  49         /* Remap FLASH according to real size */
  50         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & OR_AM_MSK);
  51         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
  52
  53         /* Re-do sizing to get full correct info */
  54         size = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  55
  56 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  57         /* monitor protection ON by default */
  58         flash_protect(FLAG_PROTECT_SET,
  59                       CONFIG_SYS_MONITOR_BASE,
  60                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  61                       &flash_info[0]);
  62 #endif
  63
  64 #ifdef  CONFIG_ENV_IS_IN_FLASH
  65         /* ENV protection ON by default */
  66         flash_protect(FLAG_PROTECT_SET,
  67                       CONFIG_ENV_ADDR,
  68                       CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  69                       &flash_info[0]);
  70 #endif
  71
  72         flash_info[0].size = size;
  73
  74         return (size);
  75 }
  76
  77 /*-----------------------------------------------------------------------
  78  */
  79 void flash_print_info  (flash_info_t *info)
  80 {
  81         int i;
  82
  83         if (info->flash_id == FLASH_UNKNOWN) {
  84                 puts ("missing or unknown FLASH type\n");
  85                 return;
  86         }
  87
  88         switch (info->flash_id & FLASH_VENDMASK) {
  89         case FLASH_MAN_AMD:     puts ("AMD ");                  break;
  90         case FLASH_MAN_FUJ:     puts ("FUJITSU ");              break;
  91         default:                puts ("Unknown Vendor ");       break;
  92         }
  93
  94         switch (info->flash_id & FLASH_TYPEMASK) {
  95         case FLASH_AM400B:      puts ("AM29LV400B (4 Mbit, bottom boot sect)\n");
  96                                 break;
  97         case FLASH_AM400T:      puts ("AM29LV400T (4 Mbit, top boot sector)\n");
  98                                 break;
  99         case FLASH_AM800B:      puts ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 100                                 break;
 101         case FLASH_AM800T:      puts ("AM29LV800T (8 Mbit, top boot sector)\n");
 102                                 break;
 103         case FLASH_AM160B:      puts ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 104                                 break;
 105         case FLASH_AM160T:      puts ("AM29LV160T (16 Mbit, top boot sector)\n");
 106                                 break;
 107         case FLASH_AM320B:      puts ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 108                                 break;
 109         case FLASH_AM320T:      puts ("AM29LV320T (32 Mbit, top boot sector)\n");
 110                                 break;
 111         default:                puts ("Unknown Chip Type\n");
 112                                 break;
 113         }
 114
 115         printf ("  Size: %ld MB in %d Sectors\n",
 116                 info->size >> 20, info->sector_count);
 117
 118         puts ("  Sector Start Addresses:");
 119         for (i=0; i<info->sector_count; ++i) {
 120                 if ((i % 5) == 0)
 121                         puts ("\n   ");
 122                 printf (" %08lX%s",
 123                         info->start[i],
 124                         info->protect[i] ? " (RO)" : "     "
 125                 );
 126         }
 127         puts ("\n");
 128         return;
 129 }
 130
 131 /*-----------------------------------------------------------------------
 132  */
 133
 134
 135 /*-----------------------------------------------------------------------
 136  */
 137
 138 /*
 139  * The following code cannot be run from FLASH!
 140  */
 141
 142 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 143 {
 144         short i;
 145         ulong value;
 146         ulong base = (ulong)addr;
 147
 148         /* Write auto select command: read Manufacturer ID */
 149         addr[0x0555] = 0x00AA00AA;
 150         addr[0x02AA] = 0x00550055;
 151         addr[0x0555] = 0x00900090;
 152
 153         value = addr[0];
 154
 155         switch (value) {
 156         case AMD_MANUFACT:
 157                 info->flash_id = FLASH_MAN_AMD;
 158                 break;
 159         case FUJ_MANUFACT:
 160                 info->flash_id = FLASH_MAN_FUJ;
 161                 break;
 162         default:
 163                 info->flash_id = FLASH_UNKNOWN;
 164                 info->sector_count = 0;
 165                 info->size = 0;
 166                 return (0);                     /* no or unknown flash  */
 167         }
 168
 169         value = addr[1];                        /* device ID            */
 170
 171         switch (value) {
 172         case AMD_ID_LV400T:
 173                 info->flash_id += FLASH_AM400T;
 174                 info->sector_count = 11;
 175                 info->size = 0x00100000;
 176                 break;                          /* => 1 MB              */
 177
 178         case AMD_ID_LV400B:
 179                 info->flash_id += FLASH_AM400B;
 180                 info->sector_count = 11;
 181                 info->size = 0x00100000;
 182                 break;                          /* => 1 MB              */
 183
 184         case AMD_ID_LV800T:
 185                 info->flash_id += FLASH_AM800T;
 186                 info->sector_count = 19;
 187                 info->size = 0x00200000;
 188                 break;                          /* => 2 MB              */
 189
 190         case AMD_ID_LV800B:
 191                 info->flash_id += FLASH_AM800B;
 192                 info->sector_count = 19;
 193                 info->size = 0x00200000;
 194                 break;                          /* => 2 MB              */
 195
 196         case AMD_ID_LV160T:
 197                 info->flash_id += FLASH_AM160T;
 198                 info->sector_count = 35;
 199                 info->size = 0x00400000;
 200                 break;                          /* => 4 MB              */
 201
 202         case AMD_ID_LV160B:
 203                 info->flash_id += FLASH_AM160B;
 204                 info->sector_count = 35;
 205                 info->size = 0x00400000;
 206                 break;                          /* => 4 MB              */
 207         case AMD_ID_LV320T:
 208                 info->flash_id += FLASH_AM320T;
 209                 info->sector_count = 71;
 210                 info->size = 0x00800000;
 211                 break;                          /* => 8 MB              */
 212
 213         case AMD_ID_LV320B:
 214                 info->flash_id += FLASH_AM320B;
 215                 info->sector_count = 71;
 216                 info->size = 0x00800000;
 217                 break;                          /* => 8 MB              */
 218         default:
 219                 info->flash_id = FLASH_UNKNOWN;
 220                 return (0);                     /* => no or unknown flash */
 221         }
 222
 223         /* set up sector start address table */
 224         switch (value) {
 225         case AMD_ID_LV400B:
 226         case AMD_ID_LV800B:
 227         case AMD_ID_LV160B:
 228                 /* set sector offsets for bottom boot block type        */
 229                 info->start[0] = base + 0x00000000;
 230                 info->start[1] = base + 0x00008000;
 231                 info->start[2] = base + 0x0000C000;
 232                 info->start[3] = base + 0x00010000;
 233                 for (i = 4; i < info->sector_count; i++) {
 234                         info->start[i] = base + (i * 0x00020000) - 0x00060000;
 235                 }
 236                 break;
 237         case AMD_ID_LV400T:
 238         case AMD_ID_LV800T:
 239         case AMD_ID_LV160T:
 240                 /* set sector offsets for top boot block type           */
 241                 i = info->sector_count - 1;
 242                 info->start[i--] = base + info->size - 0x00008000;
 243                 info->start[i--] = base + info->size - 0x0000C000;
 244                 info->start[i--] = base + info->size - 0x00010000;
 245                 for (; i >= 0; i--) {
 246                         info->start[i] = base + i * 0x00020000;
 247                 }
 248                 break;
 249         case AMD_ID_LV320B:
 250                 for (i = 0; i < info->sector_count; i++) {
 251                         info->start[i] = base;
 252                         /*
 253                          * The first 8 sectors are 8 kB,
 254                          * all the other ones  are 64 kB
 255                          */
 256                         base += (i < 8)
 257                                 ?  2 * ( 8 << 10)
 258                                 :  2 * (64 << 10);
 259                 }
 260                 break;
 261         case AMD_ID_LV320T:
 262                 for (i = 0; i < info->sector_count; i++) {
 263                         info->start[i] = base;
 264                         /*
 265                          * The last 8 sectors are 8 kB,
 266                          * all the other ones  are 64 kB
 267                          */
 268                         base += (i < (info->sector_count - 8))
 269                                 ?  2 * (64 << 10)
 270                                 :  2 * ( 8 << 10);
 271                 }
 272                 break;
 273         default:
 274                 return (0);
 275                 break;
 276         }
 277
 278         /* check for protected sectors */
 279         for (i = 0; i < info->sector_count; i++) {
 280                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 281                 /* D0 = 1 if protected */
 282                 addr = (volatile unsigned long *)(info->start[i]);
 283                 info->protect[i] = addr[2] & 1;
 284         }
 285
 286         /*
 287          * Prevent writes to uninitialized FLASH.
 288          */
 289         if (info->flash_id != FLASH_UNKNOWN) {
 290                 addr = (volatile unsigned long *)info->start[0];
 291
 292                 *addr = 0x00F000F0;     /* reset bank */
 293         }
 294
 295         return (info->size);
 296 }
 297
 298
 299 /*-----------------------------------------------------------------------
 300  */
 301
 302 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 303 {
 304         vu_long *addr = (vu_long*)(info->start[0]);
 305         int flag, prot, sect, l_sect;
 306         ulong start, now, last;
 307
 308         if ((s_first < 0) || (s_first > s_last)) {
 309                 if (info->flash_id == FLASH_UNKNOWN) {
 310                         puts ("- missing\n");
 311                 } else {
 312                         puts ("- no sectors to erase\n");
 313                 }
 314                 return 1;
 315         }
 316
 317         if ((info->flash_id == FLASH_UNKNOWN) ||
 318             (info->flash_id > FLASH_AMD_COMP)) {
 319                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 320                         info->flash_id);
 321                 return 1;
 322         }
 323
 324         prot = 0;
 325         for (sect=s_first; sect<=s_last; ++sect) {
 326                 if (info->protect[sect]) {
 327                         prot++;
 328                 }
 329         }
 330
 331         if (prot) {
 332                 printf ("- Warning: %d protected sectors will not be erased!\n",
 333                         prot);
 334         } else {
 335                 puts ("\n");
 336         }
 337
 338         l_sect = -1;
 339
 340         /* Disable interrupts which might cause a timeout here */
 341         flag = disable_interrupts();
 342
 343         addr[0x0555] = 0x00AA00AA;
 344         addr[0x02AA] = 0x00550055;
 345         addr[0x0555] = 0x00800080;
 346         addr[0x0555] = 0x00AA00AA;
 347         addr[0x02AA] = 0x00550055;
 348
 349         /* Start erase on unprotected sectors */
 350         for (sect = s_first; sect<=s_last; sect++) {
 351                 if (info->protect[sect] == 0) { /* not protected */
 352                         addr = (vu_long*)(info->start[sect]);
 353                         addr[0] = 0x00300030;
 354                         l_sect = sect;
 355                 }
 356         }
 357
 358         /* re-enable interrupts if necessary */
 359         if (flag)
 360                 enable_interrupts();
 361
 362         /* wait at least 80us - let's wait 1 ms */
 363         udelay (1000);
 364
 365         /*
 366          * We wait for the last triggered sector
 367          */
 368         if (l_sect < 0)
 369                 goto DONE;
 370
 371         start = get_timer (0);
 372         last  = start;
 373         addr = (vu_long*)(info->start[l_sect]);
 374         while ((addr[0] & 0x00800080) != 0x00800080) {
 375                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 376                         puts ("Timeout\n");
 377                         return 1;
 378                 }
 379                 /* show that we're waiting */
 380                 if ((now - last) > 1000) {      /* every second */
 381                         putc ('.');
 382                         last = now;
 383                 }
 384         }
 385
 386 DONE:
 387         /* reset to read mode */
 388         addr = (volatile unsigned long *)info->start[0];
 389         addr[0] = 0x00F000F0;   /* reset bank */
 390
 391         puts (" done\n");
 392         return 0;
 393 }
 394
 395 /*-----------------------------------------------------------------------
 396  * Copy memory to flash, returns:
 397  * 0 - OK
 398  * 1 - write timeout
 399  * 2 - Flash not erased
 400  */
 401
 402 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 403 {
 404         ulong cp, wp, data;
 405         int i, l, rc;
 406
 407         wp = (addr & ~3);       /* get lower word aligned address */
 408
 409         /*
 410          * handle unaligned start bytes
 411          */
 412         if ((l = addr - wp) != 0) {
 413                 data = 0;
 414                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 415                         data = (data << 8) | (*(uchar *)cp);
 416                 }
 417                 for (; i<4 && cnt>0; ++i) {
 418                         data = (data << 8) | *src++;
 419                         --cnt;
 420                         ++cp;
 421                 }
 422                 for (; cnt==0 && i<4; ++i, ++cp) {
 423                         data = (data << 8) | (*(uchar *)cp);
 424                 }
 425
 426                 if ((rc = write_word(info, wp, data)) != 0) {
 427                         return (rc);
 428                 }
 429                 wp += 4;
 430         }
 431
 432         /*
 433          * handle word aligned part
 434          */
 435         while (cnt >= 4) {
 436                 data = 0;
 437                 for (i=0; i<4; ++i) {
 438                         data = (data << 8) | *src++;
 439                 }
 440                 if ((rc = write_word(info, wp, data)) != 0) {
 441                         return (rc);
 442                 }
 443                 wp  += 4;
 444                 cnt -= 4;
 445         }
 446
 447         if (cnt == 0) {
 448                 return (0);
 449         }
 450
 451         /*
 452          * handle unaligned tail bytes
 453          */
 454         data = 0;
 455         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 456                 data = (data << 8) | *src++;
 457                 --cnt;
 458         }
 459         for (; i<4; ++i, ++cp) {
 460                 data = (data << 8) | (*(uchar *)cp);
 461         }
 462
 463         return (write_word(info, wp, data));
 464 }
 465
 466 /*-----------------------------------------------------------------------
 467  * Write a word to Flash, returns:
 468  * 0 - OK
 469  * 1 - write timeout
 470  * 2 - Flash not erased
 471  */
 472 static int write_word (flash_info_t *info, ulong dest, ulong data)
 473 {
 474         vu_long *addr = (vu_long*)(info->start[0]);
 475         ulong start;
 476         int flag;
 477
 478         /* Check if Flash is (sufficiently) erased */
 479         if ((*((vu_long *)dest) & data) != data) {
 480                 return (2);
 481         }
 482         /* Disable interrupts which might cause a timeout here */
 483         flag = disable_interrupts();
 484
 485         addr[0x0555] = 0x00AA00AA;
 486         addr[0x02AA] = 0x00550055;
 487         addr[0x0555] = 0x00A000A0;
 488
 489         *((vu_long *)dest) = data;
 490
 491         /* re-enable interrupts if necessary */
 492         if (flag)
 493                 enable_interrupts();
 494
 495         /* data polling for D7 */
 496         start = get_timer (0);
 497         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 498                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 499                         return (1);
 500                 }
 501         }
 502         return (0);
 503 }
 504
 505 /*-----------------------------------------------------------------------
 506  */