board/icecube/flash.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9
  10 #ifndef CONFIG_FLASH_CFI_DRIVER
  11 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  12
  13 /* NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it
  14  *        has nothing to do with the flash chip being 8-bit or 16-bit.
  15  */
  16 #ifdef CONFIG_FLASH_16BIT
  17 typedef unsigned short FLASH_PORT_WIDTH;
  18 typedef volatile unsigned short FLASH_PORT_WIDTHV;
  19 #define FLASH_ID_MASK   0xFFFF
  20 #else
  21 typedef unsigned char FLASH_PORT_WIDTH;
  22 typedef volatile unsigned char FLASH_PORT_WIDTHV;
  23 #define FLASH_ID_MASK   0xFF
  24 #endif
  25
  26 #define FPW     FLASH_PORT_WIDTH
  27 #define FPWV    FLASH_PORT_WIDTHV
  28
  29 #define ORMASK(size) ((-size) & OR_AM_MSK)
  30
  31 #define FLASH_CYCLE1    0x0555
  32 #define FLASH_CYCLE2    0x02aa
  33
  34 /*-----------------------------------------------------------------------
  35  * Functions
  36  */
  37 static ulong flash_get_size(FPWV *addr, flash_info_t *info);
  38 static void flash_reset(flash_info_t *info);
  39 static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data);
  40 static flash_info_t *flash_get_info(ulong base);
  41
  42 /*-----------------------------------------------------------------------
  43  * flash_init()
  44  *
  45  * sets up flash_info and returns size of FLASH (bytes)
  46  */
  47 unsigned long flash_init (void)
  48 {
  49         unsigned long size = 0;
  50         int i;
  51         extern void flash_preinit(void);
  52         extern void flash_afterinit(ulong);
  53         ulong flashbase = CONFIG_SYS_FLASH_BASE;
  54
  55         flash_preinit();
  56
  57         /* Init: no FLASHes known */
  58         for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  59                 memset(&flash_info[i], 0, sizeof(flash_info_t));
  60
  61                 flash_info[i].size =
  62                         flash_get_size((FPW *)flashbase, &flash_info[i]);
  63
  64                 size += flash_info[i].size;
  65                 flashbase += 0x800000;
  66         }
  67 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  68         /* monitor protection ON by default */
  69         flash_protect(FLAG_PROTECT_SET,
  70                       CONFIG_SYS_MONITOR_BASE,
  71                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  72                       flash_get_info(CONFIG_SYS_MONITOR_BASE));
  73 #endif
  74
  75 #ifdef  CONFIG_ENV_IS_IN_FLASH
  76         /* ENV protection ON by default */
  77         flash_protect(FLAG_PROTECT_SET,
  78                       CONFIG_ENV_ADDR,
  79                       CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  80                       flash_get_info(CONFIG_ENV_ADDR));
  81 #endif
  82
  83
  84         flash_afterinit(size);
  85         return size ? size : 1;
  86 }
  87
  88 /*-----------------------------------------------------------------------
  89  */
  90 static void flash_reset(flash_info_t *info)
  91 {
  92         FPWV *base = (FPWV *)(info->start[0]);
  93
  94         /* Put FLASH back in read mode */
  95         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
  96                 *base = (FPW)0x00FF00FF;        /* Intel Read Mode */
  97         else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
  98                 *base = (FPW)0x00F000F0;        /* AMD Read Mode */
  99 }
 100
 101 /*-----------------------------------------------------------------------
 102  */
 103
 104 static flash_info_t *flash_get_info(ulong base)
 105 {
 106         int i;
 107         flash_info_t * info;
 108
 109         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i ++) {
 110                 info = & flash_info[i];
 111                 if (info->size &&
 112                         info->start[0] <= base && base <= info->start[0] + info->size - 1)
 113                         break;
 114         }
 115
 116         return i == CONFIG_SYS_MAX_FLASH_BANKS ? 0 : info;
 117 }
 118
 119 /*-----------------------------------------------------------------------
 120  */
 121
 122 void flash_print_info (flash_info_t *info)
 123 {
 124         int i;
 125         uchar *boottype;
 126         uchar *bootletter;
 127         char *fmt;
 128         uchar botbootletter[] = "B";
 129         uchar topbootletter[] = "T";
 130         uchar botboottype[] = "bottom boot sector";
 131         uchar topboottype[] = "top boot sector";
 132
 133         if (info->flash_id == FLASH_UNKNOWN) {
 134                 printf ("missing or unknown FLASH type\n");
 135                 return;
 136         }
 137
 138         switch (info->flash_id & FLASH_VENDMASK) {
 139         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 140         case FLASH_MAN_BM:      printf ("BRIGHT MICRO ");       break;
 141         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 142         case FLASH_MAN_SST:     printf ("SST ");                break;
 143         case FLASH_MAN_STM:     printf ("STM ");                break;
 144         case FLASH_MAN_INTEL:   printf ("INTEL ");              break;
 145         default:                printf ("Unknown Vendor ");     break;
 146         }
 147
 148         /* check for top or bottom boot, if it applies */
 149         if (info->flash_id & FLASH_BTYPE) {
 150                 boottype = botboottype;
 151                 bootletter = botbootletter;
 152         }
 153         else {
 154                 boottype = topboottype;
 155                 bootletter = topbootletter;
 156         }
 157
 158         switch (info->flash_id & FLASH_TYPEMASK) {
 159         case FLASH_AMDLV065D:
 160                 fmt = "29LV065 (64 Mbit, uniform sectors)\n";
 161                 break;
 162         default:
 163                 fmt = "Unknown Chip Type\n";
 164                 break;
 165         }
 166
 167         printf (fmt, bootletter, boottype);
 168
 169         printf ("  Size: %ld MB in %d Sectors\n",
 170                 info->size >> 20,
 171                 info->sector_count);
 172
 173         printf ("  Sector Start Addresses:");
 174
 175         for (i=0; i<info->sector_count; ++i) {
 176                 if ((i % 5) == 0) {
 177                         printf ("\n   ");
 178                 }
 179
 180                 printf (" %08lX%s", info->start[i],
 181                         info->protect[i] ? " (RO)" : "     ");
 182         }
 183
 184         printf ("\n");
 185 }
 186
 187 /*-----------------------------------------------------------------------
 188  */
 189
 190 /*
 191  * The following code cannot be run from FLASH!
 192  */
 193
 194 ulong flash_get_size (FPWV *addr, flash_info_t *info)
 195 {
 196         int i;
 197         FPWV* addr2;
 198
 199         /* Write auto select command: read Manufacturer ID */
 200         /* Write auto select command sequence and test FLASH answer */
 201         addr[FLASH_CYCLE1] = (FPW)0x00AA00AA;   /* for AMD, Intel ignores this */
 202         addr[FLASH_CYCLE2] = (FPW)0x00550055;   /* for AMD, Intel ignores this */
 203         addr[FLASH_CYCLE1] = (FPW)0x00900090;   /* selects Intel or AMD */
 204
 205         /* The manufacturer codes are only 1 byte, so just use 1 byte.
 206          * This works for any bus width and any FLASH device width.
 207          */
 208         udelay(100);
 209         switch (addr[0] & 0xff) {
 210
 211         case (uchar)AMD_MANUFACT:
 212                 info->flash_id = FLASH_MAN_AMD;
 213                 break;
 214
 215         case (uchar)INTEL_MANUFACT:
 216                 info->flash_id = FLASH_MAN_INTEL;
 217                 break;
 218
 219         default:
 220                 info->flash_id = FLASH_UNKNOWN;
 221                 info->sector_count = 0;
 222                 info->size = 0;
 223                 break;
 224         }
 225
 226         /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
 227         if (info->flash_id != FLASH_UNKNOWN) switch ((FPW)addr[1]) {
 228
 229         case (FPW)AMD_ID_LV065D:
 230                 info->flash_id += FLASH_AMDLV065D;
 231                 info->sector_count = 128;
 232                 info->size = 0x00800000;
 233                 for( i = 0; i < info->sector_count; i++ )
 234                         info->start[i] = (ulong)addr + (i * 0x10000);
 235                 break;                          /* => 8 or 16 MB        */
 236
 237         default:
 238                 info->flash_id = FLASH_UNKNOWN;
 239                 info->sector_count = 0;
 240                 info->size = 0;
 241                 return (0);                     /* => no or unknown flash */
 242         }
 243
 244         /* test for real flash at bank 1 */
 245         addr2 = (FPW *)((ulong)addr | 0x800000);
 246         if (addr2 != addr &&
 247                 ((addr2[0] & 0xff) == (addr[0] & 0xff)) && ((FPW)addr2[1] == (FPW)addr[1])) {
 248                 /* Seems 2 banks are the same space (8Mb chip is installed,
 249                  * J24 in default position (CS0)). Disable this (first) bank.
 250                  */
 251                 info->flash_id = FLASH_UNKNOWN;
 252                 info->sector_count = 0;
 253                 info->size = 0;
 254         }
 255         /* Put FLASH back in read mode */
 256         flash_reset(info);
 257
 258         return (info->size);
 259 }
 260
 261 /*-----------------------------------------------------------------------
 262  */
 263
 264 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 265 {
 266         FPWV *addr;
 267         int flag, prot, sect;
 268         int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
 269         ulong start, now, last;
 270         int rcode = 0;
 271
 272         if ((s_first < 0) || (s_first > s_last)) {
 273                 if (info->flash_id == FLASH_UNKNOWN) {
 274                         printf ("- missing\n");
 275                 } else {
 276                         printf ("- no sectors to erase\n");
 277                 }
 278                 return 1;
 279         }
 280
 281         switch (info->flash_id & FLASH_TYPEMASK) {
 282         case FLASH_AMDLV065D:
 283                 break;
 284         case FLASH_UNKNOWN:
 285         default:
 286                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 287                         info->flash_id);
 288                 return 1;
 289         }
 290
 291         prot = 0;
 292         for (sect=s_first; sect<=s_last; ++sect) {
 293                 if (info->protect[sect]) {
 294                         prot++;
 295                 }
 296         }
 297
 298         if (prot) {
 299                 printf ("- Warning: %d protected sectors will not be erased!\n",
 300                         prot);
 301         } else {
 302                 printf ("\n");
 303         }
 304
 305         last  = get_timer(0);
 306
 307         /* Start erase on unprotected sectors */
 308         for (sect = s_first; sect<=s_last && rcode == 0; sect++) {
 309
 310                 if (info->protect[sect] != 0)   /* protected, skip it */
 311                         continue;
 312
 313                 /* Disable interrupts which might cause a timeout here */
 314                 flag = disable_interrupts();
 315
 316                 addr = (FPWV *)(info->start[sect]);
 317                 if (intel) {
 318                         *addr = (FPW)0x00500050; /* clear status register */
 319                         *addr = (FPW)0x00200020; /* erase setup */
 320                         *addr = (FPW)0x00D000D0; /* erase confirm */
 321                 }
 322                 else {
 323                         /* must be AMD style if not Intel */
 324                         FPWV *base;             /* first address in bank */
 325
 326                         base = (FPWV *)(info->start[0]);
 327                         base[FLASH_CYCLE1] = (FPW)0x00AA00AA;   /* unlock */
 328                         base[FLASH_CYCLE2] = (FPW)0x00550055;   /* unlock */
 329                         base[FLASH_CYCLE1] = (FPW)0x00800080;   /* erase mode */
 330                         base[FLASH_CYCLE1] = (FPW)0x00AA00AA;   /* unlock */
 331                         base[FLASH_CYCLE2] = (FPW)0x00550055;   /* unlock */
 332                         *addr = (FPW)0x00300030;        /* erase sector */
 333                 }
 334
 335                 /* re-enable interrupts if necessary */
 336                 if (flag)
 337                         enable_interrupts();
 338
 339                 start = get_timer(0);
 340
 341                 /* wait at least 50us for AMD, 80us for Intel.
 342                  * Let's wait 1 ms.
 343                  */
 344                 udelay (1000);
 345
 346                 while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) {
 347                         if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 348                                 printf ("Timeout\n");
 349
 350                                 if (intel) {
 351                                         /* suspend erase        */
 352                                         *addr = (FPW)0x00B000B0;
 353                                 }
 354
 355                                 flash_reset(info);      /* reset to read mode */
 356                                 rcode = 1;              /* failed */
 357                                 break;
 358                         }
 359
 360                         /* show that we're waiting */
 361                         if ((get_timer(last)) > CONFIG_SYS_HZ) {/* every second */
 362                                 putc ('.');
 363                                 last = get_timer(0);
 364                         }
 365                 }
 366
 367                 /* show that we're waiting */
 368                 if ((get_timer(last)) > CONFIG_SYS_HZ) {        /* every second */
 369                         putc ('.');
 370                         last = get_timer(0);
 371                 }
 372
 373                 flash_reset(info);      /* reset to read mode   */
 374         }
 375
 376         printf (" done\n");
 377         return rcode;
 378 }
 379
 380 /*-----------------------------------------------------------------------
 381  * Copy memory to flash, returns:
 382  * 0 - OK
 383  * 1 - write timeout
 384  * 2 - Flash not erased
 385  */
 386 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 387 {
 388         FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
 389         int bytes;        /* number of bytes to program in current word         */
 390         int left;         /* number of bytes left to program                    */
 391         int i, res;
 392
 393         for (left = cnt, res = 0;
 394                  left > 0 && res == 0;
 395                  addr += sizeof(data), left -= sizeof(data) - bytes) {
 396
 397                 bytes = addr & (sizeof(data) - 1);
 398                 addr &= ~(sizeof(data) - 1);
 399
 400                 /* combine source and destination data so can program
 401                  * an entire word of 16 or 32 bits
 402                  */
 403                 for (i = 0; i < sizeof(data); i++) {
 404                         data <<= 8;
 405                         if (i < bytes || i - bytes >= left )
 406                                 data += *((uchar *)addr + i);
 407                         else
 408                                 data += *src++;
 409                 }
 410
 411                 /* write one word to the flash */
 412                 switch (info->flash_id & FLASH_VENDMASK) {
 413                 case FLASH_MAN_AMD:
 414                         res = write_word_amd(info, (FPWV *)addr, data);
 415                         break;
 416                 default:
 417                         /* unknown flash type, error! */
 418                         printf ("missing or unknown FLASH type\n");
 419                         res = 1;        /* not really a timeout, but gives error */
 420                         break;
 421                 }
 422         }
 423
 424         return (res);
 425 }
 426
 427 /*-----------------------------------------------------------------------
 428  * Write a word to Flash for AMD FLASH
 429  * A word is 16 or 32 bits, whichever the bus width of the flash bank
 430  * (not an individual chip) is.
 431  *
 432  * returns:
 433  * 0 - OK
 434  * 1 - write timeout
 435  * 2 - Flash not erased
 436  */
 437 static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data)
 438 {
 439         ulong start;
 440         int flag;
 441         int res = 0;    /* result, assume success       */
 442         FPWV *base;             /* first address in flash bank  */
 443
 444         /* Check if Flash is (sufficiently) erased */
 445         if ((*dest & data) != data) {
 446                 return (2);
 447         }
 448
 449
 450         base = (FPWV *)(info->start[0]);
 451
 452         /* Disable interrupts which might cause a timeout here */
 453         flag = disable_interrupts();
 454
 455         base[FLASH_CYCLE1] = (FPW)0x00AA00AA;   /* unlock */
 456         base[FLASH_CYCLE2] = (FPW)0x00550055;   /* unlock */
 457         base[FLASH_CYCLE1] = (FPW)0x00A000A0;   /* selects program mode */
 458
 459         *dest = data;           /* start programming the data   */
 460
 461         /* re-enable interrupts if necessary */
 462         if (flag)
 463                 enable_interrupts();
 464
 465         start = get_timer (0);
 466
 467         /* data polling for D7 */
 468         while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) {
 469                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 470                         *dest = (FPW)0x00F000F0;        /* reset bank */
 471                         res = 1;
 472                 }
 473         }
 474
 475         return (res);
 476 }
 477 #endif /*CONFIG_FLASH_CFI_DRIVER*/