board/omap1610inn/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
   4  *
   5  * (C) Copyright 2001-2004
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * (C) Copyright 2003
   9  * Texas Instruments, <www.ti.com>
  10  * Kshitij Gupta <Kshitij@ti.com>
  11  *
  12  * See file CREDITS for list of people who contributed to this
  13  * project.
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of
  18  * the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  28  * MA 02111-1307 USA
  29  */
  30
  31 #include <common.h>
  32 #include <linux/byteorder/swab.h>
  33
  34 #define PHYS_FLASH_SECT_SIZE    0x00020000      /* 256 KB sectors (x2) */
  35 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips    */
  36
  37 /* Board support for 1 or 2 flash devices */
  38 #undef FLASH_PORT_WIDTH32
  39 #define FLASH_PORT_WIDTH16
  40
  41 #ifdef FLASH_PORT_WIDTH16
  42 #define FLASH_PORT_WIDTH                ushort
  43 #define FLASH_PORT_WIDTHV               vu_short
  44 #define SWAP(x)                 __swab16(x)
  45 #else
  46 #define FLASH_PORT_WIDTH                ulong
  47 #define FLASH_PORT_WIDTHV               vu_long
  48 #define SWAP(x)                 __swab32(x)
  49 #endif
  50
  51 #define FPW     FLASH_PORT_WIDTH
  52 #define FPWV    FLASH_PORT_WIDTHV
  53
  54 #define mb() __asm__ __volatile__ ("" : : : "memory")
  55
  56
  57 /* Flash Organization Structure */
  58 typedef struct OrgDef {
  59         unsigned int sector_number;
  60         unsigned int sector_size;
  61 } OrgDef;
  62
  63
  64 /* Flash Organizations */
  65 OrgDef OrgIntel_28F256L18T[] = {
  66         {4, 32 * 1024},                         /* 4 * 32kBytes sectors */
  67         {255, 128 * 1024},                      /* 255 * 128kBytes sectors */
  68 };
  69
  70
  71 /*-----------------------------------------------------------------------
  72  * Functions
  73  */
  74 unsigned long flash_init (void);
  75 static ulong flash_get_size (FPW * addr, flash_info_t * info);
  76 static int write_data (flash_info_t * info, ulong dest, FPW data);
  77 static void flash_get_offsets (ulong base, flash_info_t * info);
  78 void inline spin_wheel (void);
  79 void flash_print_info (flash_info_t * info);
  80 void flash_unprotect_sectors (FPWV * addr);
  81 int flash_erase (flash_info_t * info, int s_first, int s_last);
  82 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt);
  83 void flash_unlock(flash_info_t * info);
  84
  85 /*-----------------------------------------------------------------------
  86  */
  87
  88 unsigned long flash_init (void)
  89 {
  90         int i;
  91         ulong size = 0;
  92
  93         for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
  94                 switch (i) {
  95                 case 0:
  96                         flash_get_size ((FPW *) CFG_FLASH_BASE, &flash_info[i]);
  97                         flash_get_offsets (CFG_FLASH_BASE, &flash_info[i]);
  98                         /* to reset the lock bit */
  99                         flash_unlock(&flash_info[i]);
 100                         break;
 101                 default:
 102                         panic ("configured too many flash banks!\n");
 103                         break;
 104                 }
 105                 size += flash_info[i].size;
 106         }
 107
 108         /* Protect monitor and environment sectors
 109          */
 110         flash_protect (FLAG_PROTECT_SET,
 111                         CFG_FLASH_BASE,
 112                         CFG_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
 113
 114         flash_protect (FLAG_PROTECT_SET,
 115                         CFG_ENV_ADDR,
 116                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
 117
 118         return size;
 119 }
 120
 121 /*-----------------------------------------------------------------------
 122  */
 123 void flash_unlock(flash_info_t * info)
 124 {
 125         int j;
 126         for (j=2;j<CFG_MAX_FLASH_SECT;j++){
 127         FPWV *addr = (FPWV *) (info->start[j]);
 128         flash_unprotect_sectors (addr);
 129         *addr = (FPW) 0x00500050;/* clear status register */
 130         *addr = (FPW) 0x00FF00FF;/* resest to read mode */
 131         }
 132 }
 133
 134 /*-----------------------------------------------------------------------
 135  */
 136 static void flash_get_offsets (ulong base, flash_info_t * info)
 137 {
 138         int i;
 139         OrgDef *pOrgDef;
 140
 141         pOrgDef = OrgIntel_28F256L18T;
 142         if (info->flash_id == FLASH_UNKNOWN) {
 143                 return;
 144         }
 145
 146         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
 147                 for (i = 0; i < info->sector_count; i++) {
 148                         if (i > 255) {
 149                                 info->start[i] = base + (i * 0x8000);
 150                                 info->protect[i] = 0;
 151                         } else {
 152                                 info->start[i] = base +
 153                                                 (i * PHYS_FLASH_SECT_SIZE);
 154                                 info->protect[i] = 0;
 155                         }
 156                 }
 157         }
 158 }
 159
 160 /*-----------------------------------------------------------------------
 161  */
 162 void flash_print_info (flash_info_t * info)
 163 {
 164         int i;
 165
 166         if (info->flash_id == FLASH_UNKNOWN) {
 167                 printf ("missing or unknown FLASH type\n");
 168                 return;
 169         }
 170
 171         switch (info->flash_id & FLASH_VENDMASK) {
 172         case FLASH_MAN_INTEL:
 173                 printf ("INTEL ");
 174                 break;
 175         default:
 176                 printf ("Unknown Vendor ");
 177                 break;
 178         }
 179
 180         switch (info->flash_id & FLASH_TYPEMASK) {
 181         case FLASH_28F256L18T:
 182                 printf ("FLASH 28F256L18T\n");
 183                 break;
 184         default:
 185                 printf ("Unknown Chip Type\n");
 186                 break;
 187         }
 188
 189         printf ("  Size: %ld MB in %d Sectors\n",
 190                         info->size >> 20, info->sector_count);
 191
 192         printf ("  Sector Start Addresses:");
 193         for (i = 0; i < info->sector_count; ++i) {
 194                 if ((i % 5) == 0)
 195                         printf ("\n   ");
 196                 printf (" %08lX%s",
 197                         info->start[i], info->protect[i] ? " (RO)" : "     ");
 198         }
 199         printf ("\n");
 200         return;
 201 }
 202
 203 /*
 204  * The following code cannot be run from FLASH!
 205  */
 206 static ulong flash_get_size (FPW * addr, flash_info_t * info)
 207 {
 208         volatile FPW value;
 209
 210         /* Write auto select command: read Manufacturer ID */
 211         addr[0x5555] = (FPW) 0x00AA00AA;
 212         addr[0x2AAA] = (FPW) 0x00550055;
 213         addr[0x5555] = (FPW) 0x00900090;
 214
 215         mb ();
 216         value = addr[0];
 217
 218         switch (value) {
 219
 220         case (FPW) INTEL_MANUFACT:
 221                 info->flash_id = FLASH_MAN_INTEL;
 222                 break;
 223
 224         default:
 225                 info->flash_id = FLASH_UNKNOWN;
 226                 info->sector_count = 0;
 227                 info->size = 0;
 228                 addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 229                 return (0);             /* no or unknown flash  */
 230         }
 231
 232         mb ();
 233         value = addr[1];        /* device ID        */
 234         switch (value) {
 235
 236         case (FPW) (INTEL_ID_28F256L18T):
 237                 info->flash_id += FLASH_28F256L18T;
 238                 info->sector_count = 259;
 239                 info->size = 0x02000000;
 240                 break;                  /* => 32 MB     */
 241
 242         default:
 243                 info->flash_id = FLASH_UNKNOWN;
 244                 break;
 245         }
 246
 247         if (info->sector_count > CFG_MAX_FLASH_SECT) {
 248                 printf ("** ERROR: sector count %d > max (%d) **\n",
 249                                 info->sector_count, CFG_MAX_FLASH_SECT);
 250                 info->sector_count = CFG_MAX_FLASH_SECT;
 251         }
 252
 253         addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 254
 255         return (info->size);
 256 }
 257
 258
 259 /* unprotects a sector for write and erase
 260  * on some intel parts, this unprotects the entire chip, but it
 261  * wont hurt to call this additional times per sector...
 262  */
 263 void flash_unprotect_sectors (FPWV * addr)
 264 {
 265 #define PD_FINTEL_WSMS_READY_MASK    0x0080
 266
 267         *addr = (FPW) 0x00500050;       /* clear status register */
 268
 269         /* this sends the clear lock bit command */
 270         *addr = (FPW) 0x00600060;
 271         *addr = (FPW) 0x00D000D0;
 272 }
 273
 274
 275 /*-----------------------------------------------------------------------
 276  */
 277
 278 int flash_erase (flash_info_t * info, int s_first, int s_last)
 279 {
 280         int flag, prot, sect;
 281         ulong type, start, last;
 282         int rcode = 0;
 283
 284         if ((s_first < 0) || (s_first > s_last)) {
 285                 if (info->flash_id == FLASH_UNKNOWN) {
 286                         printf ("- missing\n");
 287                 } else {
 288                         printf ("- no sectors to erase\n");
 289                 }
 290                 return 1;
 291         }
 292
 293         type = (info->flash_id & FLASH_VENDMASK);
 294         if ((type != FLASH_MAN_INTEL)) {
 295                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 296                                 info->flash_id);
 297                 return 1;
 298         }
 299
 300         prot = 0;
 301         for (sect = s_first; sect <= s_last; ++sect) {
 302                 if (info->protect[sect]) {
 303                         prot++;
 304                 }
 305         }
 306
 307         if (prot) {
 308                 printf ("- Warning: %d protected sectors will not be erased!\n",
 309                                 prot);
 310         } else {
 311                 printf ("\n");
 312         }
 313
 314
 315         start = get_timer (0);
 316         last = start;
 317
 318         /* Disable interrupts which might cause a timeout here */
 319         flag = disable_interrupts ();
 320
 321         /* Start erase on unprotected sectors */
 322         for (sect = s_first; sect <= s_last; sect++) {
 323                 if (info->protect[sect] == 0) { /* not protected */
 324                         FPWV *addr = (FPWV *) (info->start[sect]);
 325                         FPW status;
 326
 327                         printf ("Erasing sector %2d ... ", sect);
 328
 329                         flash_unprotect_sectors (addr);
 330
 331                         /* arm simple, non interrupt dependent timer */
 332                         reset_timer_masked ();
 333
 334                         *addr = (FPW) 0x00500050;/* clear status register */
 335                         *addr = (FPW) 0x00200020;/* erase setup */
 336                         *addr = (FPW) 0x00D000D0;/* erase confirm */
 337
 338                         while (((status =
 339                                 *addr) & (FPW) 0x00800080) !=
 340                                 (FPW) 0x00800080) {
 341                                         if (get_timer_masked () >
 342                                         CFG_FLASH_ERASE_TOUT) {
 343                                         printf ("Timeout\n");
 344                                         /* suspend erase     */
 345                                         *addr = (FPW) 0x00B000B0;
 346                                         /* reset to read mode */
 347                                         *addr = (FPW) 0x00FF00FF;
 348                                         rcode = 1;
 349                                         break;
 350                                 }
 351                         }
 352
 353                         /* clear status register cmd.   */
 354                         *addr = (FPW) 0x00500050;
 355                         *addr = (FPW) 0x00FF00FF;/* resest to read mode */
 356                         printf (" done\n");
 357                 }
 358         }
 359         return rcode;
 360 }
 361
 362 /*-----------------------------------------------------------------------
 363  * Copy memory to flash, returns:
 364  * 0 - OK
 365  * 1 - write timeout
 366  * 2 - Flash not erased
 367  * 4 - Flash not identified
 368  */
 369
 370 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 371 {
 372         ulong cp, wp;
 373         FPW data;
 374         int count, i, l, rc, port_width;
 375
 376         if (info->flash_id == FLASH_UNKNOWN) {
 377                 return 4;
 378         }
 379 /* get lower word aligned address */
 380 #ifdef FLASH_PORT_WIDTH16
 381         wp = (addr & ~1);
 382         port_width = 2;
 383 #else
 384         wp = (addr & ~3);
 385         port_width = 4;
 386 #endif
 387
 388         /*
 389          * handle unaligned start bytes
 390          */
 391         if ((l = addr - wp) != 0) {
 392                 data = 0;
 393                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 394                         data = (data << 8) | (*(uchar *) cp);
 395                 }
 396                 for (; i < port_width && cnt > 0; ++i) {
 397                         data = (data << 8) | *src++;
 398                         --cnt;
 399                         ++cp;
 400                 }
 401                 for (; cnt == 0 && i < port_width; ++i, ++cp) {
 402                         data = (data << 8) | (*(uchar *) cp);
 403                 }
 404
 405                 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
 406                         return (rc);
 407                 }
 408                 wp += port_width;
 409         }
 410
 411         /*
 412          * handle word aligned part
 413          */
 414         count = 0;
 415         while (cnt >= port_width) {
 416                 data = 0;
 417                 for (i = 0; i < port_width; ++i) {
 418                         data = (data << 8) | *src++;
 419                 }
 420                 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
 421                         return (rc);
 422                 }
 423                 wp += port_width;
 424                 cnt -= port_width;
 425                 if (count++ > 0x800) {
 426                         spin_wheel ();
 427                         count = 0;
 428                 }
 429         }
 430
 431         if (cnt == 0) {
 432                 return (0);
 433         }
 434
 435         /*
 436          * handle unaligned tail bytes
 437          */
 438         data = 0;
 439         for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
 440                 data = (data << 8) | *src++;
 441                 --cnt;
 442         }
 443         for (; i < port_width; ++i, ++cp) {
 444                 data = (data << 8) | (*(uchar *) cp);
 445         }
 446
 447         return (write_data (info, wp, SWAP (data)));
 448 }
 449
 450 /*-----------------------------------------------------------------------
 451  * Write a word or halfword to Flash, returns:
 452  * 0 - OK
 453  * 1 - write timeout
 454  * 2 - Flash not erased
 455  */
 456 static int write_data (flash_info_t * info, ulong dest, FPW data)
 457 {
 458         FPWV *addr = (FPWV *) dest;
 459         ulong status;
 460         int flag;
 461
 462         /* Check if Flash is (sufficiently) erased */
 463         if ((*addr & data) != data) {
 464                 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
 465                 return (2);
 466         }
 467         /* Disable interrupts which might cause a timeout here */
 468         flag = disable_interrupts ();
 469         *addr = (FPW) 0x00400040;       /* write setup */
 470         *addr = data;
 471
 472         /* arm simple, non interrupt dependent timer */
 473         reset_timer_masked ();
 474
 475         /* wait while polling the status register */
 476         while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
 477                 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
 478                         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 479                         return (1);
 480                 }
 481         }
 482         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 483         return (0);
 484 }
 485
 486 void inline spin_wheel (void)
 487 {
 488         static int p = 0;
 489         static char w[] = "\\/-";
 490
 491         printf ("\010%c", w[p]);
 492         (++p == 3) ? (p = 0) : 0;
 493 }