board/sacsng/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <configs/sacsng.h>
  10
  11
  12 #undef  DEBUG
  13
  14 #ifndef CONFIG_ENV_ADDR
  15 #define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  16 #endif
  17 #ifndef CONFIG_ENV_SIZE
  18 #define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
  19 #endif
  20
  21
  22 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  23
  24 /*-----------------------------------------------------------------------
  25  * Functions
  26  */
  27 static ulong flash_get_size (vu_short *addr, flash_info_t *info);
  28 static int write_word (flash_info_t *info, ulong dest, ulong data);
  29
  30 /*-----------------------------------------------------------------------
  31  */
  32
  33 unsigned long flash_init (void)
  34 {
  35         unsigned long size_b0, size_b1;
  36         int i;
  37
  38         /* Init: no FLASHes known */
  39         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  40                 flash_info[i].flash_id = FLASH_UNKNOWN;
  41         }
  42
  43         size_b0 = flash_get_size((vu_short *)CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
  44
  45         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  46                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  47                         size_b0, size_b0<<20);
  48         }
  49
  50         size_b1 = flash_get_size((vu_short *)CONFIG_SYS_FLASH1_BASE, &flash_info[1]);
  51
  52 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  53         /* monitor protection ON by default */
  54         flash_protect(FLAG_PROTECT_SET,
  55                       CONFIG_SYS_MONITOR_BASE,
  56                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  57                       &flash_info[0]);
  58 #endif
  59
  60 #ifdef  CONFIG_ENV_IS_IN_FLASH
  61         /* ENV protection ON by default */
  62         flash_protect(FLAG_PROTECT_SET,
  63                       CONFIG_ENV_ADDR,
  64                       CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  65                       &flash_info[0]);
  66 #endif
  67
  68         if (size_b1) {
  69 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  70                 /* monitor protection ON by default */
  71                 flash_protect(FLAG_PROTECT_SET,
  72                               CONFIG_SYS_MONITOR_BASE,
  73                               CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  74                               &flash_info[1]);
  75 #endif
  76
  77 #ifdef  CONFIG_ENV_IS_IN_FLASH
  78                 /* ENV protection ON by default */
  79                 flash_protect(FLAG_PROTECT_SET,
  80                               CONFIG_ENV_ADDR,
  81                               CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  82                               &flash_info[1]);
  83 #endif
  84         } else {
  85                 flash_info[1].flash_id = FLASH_UNKNOWN;
  86                 flash_info[1].sector_count = -1;
  87         }
  88
  89         flash_info[0].size = size_b0;
  90         flash_info[1].size = size_b1;
  91
  92         /*
  93          * We only report the primary flash for U-Boot's use.
  94          */
  95         return (size_b0);
  96 }
  97
  98 /*-----------------------------------------------------------------------
  99  */
 100 void flash_print_info  (flash_info_t *info)
 101 {
 102         int i;
 103
 104         if (info->flash_id == FLASH_UNKNOWN) {
 105                 printf ("missing or unknown FLASH type\n");
 106                 return;
 107         }
 108
 109         switch (info->flash_id & FLASH_VENDMASK) {
 110         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 111         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 112         default:                printf ("Unknown Vendor ");     break;
 113         }
 114
 115         switch (info->flash_id & FLASH_TYPEMASK) {
 116         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 117                                 break;
 118         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 119                                 break;
 120         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 121                                 break;
 122         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 123                                 break;
 124         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 125                                 break;
 126         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 127                                 break;
 128         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 129                                 break;
 130         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 131                                 break;
 132         default:                printf ("Unknown Chip Type\n");
 133                                 break;
 134         }
 135
 136         printf ("  Size: %ld MB in %d Sectors\n",
 137                 info->size >> 20, info->sector_count);
 138
 139         printf ("  Sector Start Addresses:");
 140         for (i=0; i<info->sector_count; ++i) {
 141                 if ((i % 5) == 0)
 142                         printf ("\n   ");
 143                 printf (" %08lX%s",
 144                         info->start[i],
 145                         info->protect[i] ? " (RO)" : "     "
 146                 );
 147         }
 148         printf ("\n");
 149         return;
 150 }
 151
 152 /*-----------------------------------------------------------------------
 153  */
 154
 155
 156 /*-----------------------------------------------------------------------
 157  */
 158
 159 /*
 160  * The following code cannot be run from FLASH!
 161  */
 162
 163 static ulong flash_get_size (vu_short *addr, flash_info_t *info)
 164 {
 165         short i;
 166         ushort value;
 167         ulong  base = (ulong)addr;
 168
 169         /* Write auto select command: read Manufacturer ID */
 170         addr[0x0555] = 0xAAAA;
 171         addr[0x02AA] = 0x5555;
 172         addr[0x0555] = 0x9090;
 173         __asm__ __volatile__(" sync\n ");
 174
 175         value = addr[0];
 176 #ifdef DEBUG
 177         printf("Flash manufacturer 0x%04X\n", value);
 178 #endif
 179
 180         if(value == (ushort)AMD_MANUFACT) {
 181                 info->flash_id = FLASH_MAN_AMD;
 182         } else if (value == (ushort)FUJ_MANUFACT) {
 183                 info->flash_id = FLASH_MAN_FUJ;
 184         } else {
 185 #ifdef DEBUG
 186                 printf("Unknown flash manufacturer 0x%04X\n", value);
 187 #endif
 188                 info->flash_id = FLASH_UNKNOWN;
 189                 info->sector_count = 0;
 190                 info->size = 0;
 191                 return (0);                     /* no or unknown flash  */
 192         }
 193
 194         value = addr[1];                        /* device ID            */
 195 #ifdef DEBUG
 196         printf("Flash type 0x%04X\n", value);
 197 #endif
 198
 199         if(value == (ushort)AMD_ID_LV400T) {
 200                 info->flash_id += FLASH_AM400T;
 201                 info->sector_count = 11;
 202                 info->size = 0x00080000;        /* => 0.5 MB            */
 203         } else if(value == (ushort)AMD_ID_LV400B) {
 204                 info->flash_id += FLASH_AM400B;
 205                 info->sector_count = 11;
 206                 info->size = 0x00080000;        /* => 0.5 MB            */
 207         } else if(value == (ushort)AMD_ID_LV800T) {
 208                 info->flash_id += FLASH_AM800T;
 209                 info->sector_count = 19;
 210                 info->size = 0x00100000;        /* => 1 MB              */
 211         } else if(value == (ushort)AMD_ID_LV800B) {
 212                 info->flash_id += FLASH_AM800B;
 213                 info->sector_count = 19;
 214                 info->size = 0x00100000;        /* => 1 MB              */
 215         } else if(value == (ushort)AMD_ID_LV160T) {
 216                 info->flash_id += FLASH_AM160T;
 217                 info->sector_count = 35;
 218                 info->size = 0x00200000;        /* => 2 MB              */
 219         } else if(value == (ushort)AMD_ID_LV160B) {
 220                 info->flash_id += FLASH_AM160B;
 221                 info->sector_count = 35;
 222                 info->size = 0x00200000;        /* => 2 MB              */
 223         } else if(value == (ushort)AMD_ID_LV320T) {
 224                 info->flash_id += FLASH_AM320T;
 225                 info->sector_count = 67;
 226                 info->size = 0x00400000;        /* => 4 MB              */
 227         } else if(value == (ushort)AMD_ID_LV320B) {
 228                 info->flash_id += FLASH_AM320B;
 229                 info->sector_count = 67;
 230                 info->size = 0x00400000;        /* => 4 MB              */
 231         } else {
 232 #ifdef DEBUG
 233                 printf("Unknown flash type 0x%04X\n", value);
 234                 info->size = CONFIG_SYS_FLASH_SIZE;
 235 #else
 236                 info->flash_id = FLASH_UNKNOWN;
 237                 return (0);                     /* => no or unknown flash */
 238 #endif
 239         }
 240
 241         /* set up sector start address table */
 242         if (info->flash_id & FLASH_BTYPE) {
 243                 /* set sector offsets for bottom boot block type        */
 244                 info->start[0] = base + 0x00000000;
 245                 info->start[1] = base + 0x00004000;
 246                 info->start[2] = base + 0x00006000;
 247                 info->start[3] = base + 0x00008000;
 248                 for (i = 4; i < info->sector_count; i++) {
 249                         info->start[i] = base + ((i - 3) * 0x00010000);
 250                 }
 251         } else {
 252                 /* set sector offsets for top boot block type           */
 253                 i = info->sector_count - 1;
 254                 info->start[i--] = base + info->size - 0x00004000;
 255                 info->start[i--] = base + info->size - 0x00006000;
 256                 info->start[i--] = base + info->size - 0x00008000;
 257                 for (; i >= 0; i--) {
 258                         info->start[i] = base + (i * 0x00010000);
 259                 }
 260         }
 261
 262         /* check for protected sectors */
 263         for (i = 0; i < info->sector_count; i++) {
 264                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 265                 /* D0 = 1 if protected */
 266                 addr = (volatile unsigned short *)(info->start[i]);
 267                 info->protect[i] = addr[2] & 1;
 268         }
 269
 270         /*
 271          * Prevent writes to uninitialized FLASH.
 272          */
 273         if (info->flash_id != FLASH_UNKNOWN) {
 274                 addr = (volatile unsigned short *)info->start[0];
 275
 276         }
 277
 278         addr[0] = 0xF0F0;       /* reset bank */
 279         __asm__ __volatile__(" sync\n ");
 280         return (info->size);
 281 }
 282
 283
 284 /*-----------------------------------------------------------------------
 285  */
 286
 287 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 288 {
 289         vu_short *addr = (vu_short*)(info->start[0]);
 290         int flag, prot, sect, l_sect;
 291         ulong start, now, last;
 292
 293         if ((s_first < 0) || (s_first > s_last)) {
 294                 if (info->flash_id == FLASH_UNKNOWN) {
 295                         printf ("- missing\n");
 296                 } else {
 297                         printf ("- no sectors to erase\n");
 298                 }
 299                 return 1;
 300         }
 301
 302         if ((info->flash_id == FLASH_UNKNOWN) ||
 303             (info->flash_id > FLASH_AMD_COMP)) {
 304                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 305                         info->flash_id);
 306                 return 1;
 307         }
 308
 309         prot = 0;
 310         for (sect=s_first; sect<=s_last; ++sect) {
 311                 if (info->protect[sect]) {
 312                         prot++;
 313                 }
 314         }
 315
 316         if (prot) {
 317                 printf ("- Warning: %d protected sectors will not be erased!\n",
 318                         prot);
 319         } else {
 320                 printf ("\n");
 321         }
 322
 323         l_sect = -1;
 324
 325         /* Disable interrupts which might cause a timeout here */
 326         flag = disable_interrupts();
 327
 328         addr[0x0555] = 0xAAAA;
 329         addr[0x02AA] = 0x5555;
 330         addr[0x0555] = 0x8080;
 331         addr[0x0555] = 0xAAAA;
 332         addr[0x02AA] = 0x5555;
 333         __asm__ __volatile__(" sync\n ");
 334
 335         /* Start erase on unprotected sectors */
 336         for (sect = s_first; sect<=s_last; sect++) {
 337                 if (info->protect[sect] == 0) { /* not protected */
 338                         addr = (vu_short*)(info->start[sect]);
 339                         addr[0] = 0x3030;
 340                         l_sect = sect;
 341                 }
 342         }
 343
 344         /* re-enable interrupts if necessary */
 345         if (flag)
 346                 enable_interrupts();
 347
 348         /* wait at least 80us - let's wait 1 ms */
 349         udelay (1000);
 350
 351         /*
 352          * We wait for the last triggered sector
 353          */
 354         if (l_sect < 0)
 355                 goto DONE;
 356
 357         start = get_timer (0);
 358         last  = start;
 359         addr = (vu_short*)(info->start[l_sect]);
 360         while ((addr[0] & 0x0080) != 0x0080) {
 361                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 362                         printf ("Timeout\n");
 363                         addr[0] = 0xF0F0;       /* reset bank */
 364                         __asm__ __volatile__(" sync\n ");
 365                         return 1;
 366                 }
 367                 /* show that we're waiting */
 368                 if ((now - last) > 1000) {      /* every second */
 369                         putc ('.');
 370                         last = now;
 371                 }
 372         }
 373
 374 DONE:
 375         /* reset to read mode */
 376         addr = (vu_short*)info->start[0];
 377         addr[0] = 0xF0F0;       /* reset bank */
 378         __asm__ __volatile__(" sync\n ");
 379
 380         printf (" done\n");
 381         return 0;
 382 }
 383
 384 /*-----------------------------------------------------------------------
 385  * Copy memory to flash, returns:
 386  * 0 - OK
 387  * 1 - write timeout
 388  * 2 - Flash not erased
 389  */
 390
 391 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 392 {
 393         ulong cp, wp, data;
 394         int i, l, rc;
 395
 396         wp = (addr & ~3);       /* get lower word aligned address */
 397
 398         /*
 399          * handle unaligned start bytes
 400          */
 401         if ((l = addr - wp) != 0) {
 402                 data = 0;
 403                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 404                         data = (data << 8) | (*(uchar *)cp);
 405                 }
 406                 for (; i<4 && cnt>0; ++i) {
 407                         data = (data << 8) | *src++;
 408                         --cnt;
 409                         ++cp;
 410                 }
 411                 for (; cnt==0 && i<4; ++i, ++cp) {
 412                         data = (data << 8) | (*(uchar *)cp);
 413                 }
 414
 415                 if ((rc = write_word(info, wp, data)) != 0) {
 416                         return (rc);
 417                 }
 418                 wp += 4;
 419         }
 420
 421         /*
 422          * handle word aligned part
 423          */
 424         while (cnt >= 4) {
 425                 data = 0;
 426                 for (i=0; i<4; ++i) {
 427                         data = (data << 8) | *src++;
 428                 }
 429                 if ((rc = write_word(info, wp, data)) != 0) {
 430                         return (rc);
 431                 }
 432                 wp  += 4;
 433                 cnt -= 4;
 434         }
 435
 436         if (cnt == 0) {
 437                 return (0);
 438         }
 439
 440         /*
 441          * handle unaligned tail bytes
 442          */
 443         data = 0;
 444         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 445                 data = (data << 8) | *src++;
 446                 --cnt;
 447         }
 448         for (; i<4; ++i, ++cp) {
 449                 data = (data << 8) | (*(uchar *)cp);
 450         }
 451
 452         return (write_word(info, wp, data));
 453 }
 454
 455 /*-----------------------------------------------------------------------
 456  * Write a word to Flash, returns:
 457  * 0 - OK
 458  * 1 - write timeout
 459  * 2 - Flash not erased
 460  */
 461 static int write_word (flash_info_t *info, ulong dest, ulong data)
 462 {
 463         vu_short *addr = (vu_short*)(info->start[0]);
 464         ulong start;
 465         int flag;
 466         int j;
 467
 468         /* Check if Flash is (sufficiently) erased */
 469         if (((*(vu_long *)dest) & data) != data) {
 470                 return (2);
 471         }
 472         /* Disable interrupts which might cause a timeout here */
 473         flag = disable_interrupts();
 474
 475         /* The original routine was designed to write 32 bit words to
 476          * 32 bit wide memory.  We have 16 bit wide memory so we do
 477          * two writes.  We write the LSB first at dest+2 and then the
 478          * MSB at dest (lousy big endian).
 479          */
 480         dest += 2;
 481         for(j = 0; j < 2; j++) {
 482                 addr[0x0555] = 0xAAAA;
 483                 addr[0x02AA] = 0x5555;
 484                 addr[0x0555] = 0xA0A0;
 485                 __asm__ __volatile__(" sync\n ");
 486
 487                 *((vu_short *)dest) = (ushort)data;
 488
 489                 /* re-enable interrupts if necessary */
 490                 if (flag)
 491                         enable_interrupts();
 492
 493                 /* data polling for D7 */
 494                 start = get_timer (0);
 495                 while (*(vu_short *)dest != (ushort)data) {
 496                         if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 497                                 return (1);
 498                         }
 499                 }
 500                 dest -= 2;
 501                 data >>= 16;
 502         }
 503         return (0);
 504 }
 505
 506 /*-----------------------------------------------------------------------
 507  */