board/armltd/versatile/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[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips    */
  36
  37 /* Board support for 1 or 2 flash devices */
  38 #define FLASH_PORT_WIDTH32
  39 #undef 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_28F256K3[] = {
  66         {256, 128 * 1024},              /* 256 * 128kBytes sectors */
  67 };
  68
  69
  70 /*-----------------------------------------------------------------------
  71  * Functions
  72  */
  73 unsigned long flash_init (void);
  74 static ulong flash_get_size (FPW * addr, flash_info_t * info);
  75 static int write_data (flash_info_t * info, ulong dest, FPW data);
  76 static void flash_get_offsets (ulong base, flash_info_t * info);
  77 void inline spin_wheel (void);
  78 void flash_print_info (flash_info_t * info);
  79 void flash_unprotect_sectors (FPWV * addr);
  80 int flash_erase (flash_info_t * info, int s_first, int s_last);
  81 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt);
  82
  83 /*-----------------------------------------------------------------------
  84  */
  85
  86 static void flash_vpp(int on)
  87 {
  88         unsigned int tmp;
  89
  90         tmp = *(unsigned int *)(VERSATILE_FLASHCTRL);
  91
  92         if (on)
  93             tmp |= VERSATILE_FLASHPROG_FLVPPEN;
  94         else
  95             tmp &= ~VERSATILE_FLASHPROG_FLVPPEN;
  96
  97         *(unsigned int *)(VERSATILE_FLASHCTRL) = tmp;
  98 }
  99
 100 unsigned long flash_init (void)
 101 {
 102         int i;
 103         ulong size = 0;
 104         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 105                 switch (i) {
 106                 case 0:
 107                         flash_vpp(1);
 108                         flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
 109                         flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
 110                         flash_vpp(0);
 111                         break;
 112                 default:
 113                         panic ("configured too many flash banks!\n");
 114                         break;
 115                 }
 116                 size += flash_info[i].size;
 117         }
 118
 119         /* Protect monitor and environment sectors
 120          */
 121         flash_protect (FLAG_PROTECT_SET,
 122                         CONFIG_SYS_FLASH_BASE,
 123                         CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
 124
 125         return size;
 126 }
 127
 128 /*-----------------------------------------------------------------------
 129  */
 130 static void flash_get_offsets (ulong base, flash_info_t * info)
 131 {
 132         int i;
 133         OrgDef *pOrgDef;
 134
 135         pOrgDef = OrgIntel_28F256K3;
 136         if (info->flash_id == FLASH_UNKNOWN) {
 137                 return;
 138         }
 139
 140         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
 141                 for (i = 0; i < info->sector_count; i++) {
 142                         if (i > 255) {
 143                                 info->start[i] = base + (i * 0x8000);
 144                                 info->protect[i] = 0;
 145                         } else {
 146                                 info->start[i] = base +
 147                                                 (i * PHYS_FLASH_SECT_SIZE);
 148                                 info->protect[i] = 0;
 149                         }
 150                 }
 151         }
 152 }
 153
 154 /*-----------------------------------------------------------------------
 155  */
 156 void flash_print_info (flash_info_t * info)
 157 {
 158         int i;
 159
 160         if (info->flash_id == FLASH_UNKNOWN) {
 161                 printf ("missing or unknown FLASH type\n");
 162                 return;
 163         }
 164
 165         switch (info->flash_id & FLASH_VENDMASK) {
 166         case FLASH_MAN_INTEL:
 167                 printf ("INTEL ");
 168                 break;
 169         default:
 170                 printf ("Unknown Vendor ");
 171                 break;
 172         }
 173
 174         switch (info->flash_id & FLASH_TYPEMASK) {
 175         case FLASH_28F256L18T:
 176                 printf ("FLASH 28F256L18T\n");
 177                 break;
 178         case FLASH_28F256K3:
 179                 printf ("FLASH 28F256K3\n");
 180                 break;
 181         default:
 182                 printf ("Unknown Chip Type\n");
 183                 break;
 184         }
 185
 186         printf ("  Size: %ld MB in %d Sectors\n",
 187                         info->size >> 20, info->sector_count);
 188
 189         printf ("  Sector Start Addresses:");
 190         for (i = 0; i < info->sector_count; ++i) {
 191                 if ((i % 5) == 0)
 192                         printf ("\n   ");
 193                 printf (" %08lX%s",
 194                         info->start[i], info->protect[i] ? " (RO)" : "     ");
 195         }
 196         printf ("\n");
 197         return;
 198 }
 199
 200 /*
 201  * The following code cannot be run from FLASH!
 202  */
 203 static ulong flash_get_size (FPW * addr, flash_info_t * info)
 204 {
 205         volatile FPW value;
 206
 207         /* Write auto select command: read Manufacturer ID */
 208         addr[0x5555] = (FPW) 0x00AA00AA;
 209         addr[0x2AAA] = (FPW) 0x00550055;
 210         addr[0x5555] = (FPW) 0x00900090;
 211
 212         mb ();
 213         value = addr[0];
 214         switch (value) {
 215
 216         case (FPW) INTEL_MANUFACT:
 217                 info->flash_id = FLASH_MAN_INTEL;
 218                 break;
 219
 220         default:
 221                 info->flash_id = FLASH_UNKNOWN;
 222                 info->sector_count = 0;
 223                 info->size = 0;
 224                 addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 225                 return (0);             /* no or unknown flash  */
 226         }
 227
 228         mb ();
 229         value = addr[1];        /* device ID        */
 230         switch (value) {
 231
 232         case (FPW) (INTEL_ID_28F256L18T):
 233                 info->flash_id += FLASH_28F256L18T;
 234                 info->sector_count = 259;
 235                 info->size = 0x02000000;
 236                 break;                  /* => 32 MB     */
 237
 238         case (FPW)(INTEL_ID_28F256K3):
 239                 info->flash_id += FLASH_28F256K3;
 240                 info->sector_count = 256;
 241                 info->size = 0x02000000;
 242                 break;
 243
 244         default:
 245                 info->flash_id = FLASH_UNKNOWN;
 246                 break;
 247         }
 248
 249         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 250                 printf ("** ERROR: sector count %d > max (%d) **\n",
 251                                 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 252                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 253         }
 254
 255         addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 256
 257         return (info->size);
 258 }
 259
 260
 261 /* unprotects a sector for write and erase
 262  * on some intel parts, this unprotects the entire chip, but it
 263  * wont hurt to call this additional times per sector...
 264  */
 265 void flash_unprotect_sectors (FPWV * addr)
 266 {
 267 #define PD_FINTEL_WSMS_READY_MASK    0x0080
 268
 269         *addr = (FPW) 0x00500050;       /* clear status register */
 270
 271         /* this sends the clear lock bit command */
 272         *addr = (FPW) 0x00600060;
 273         *addr = (FPW) 0x00D000D0;
 274 }
 275
 276
 277 /*-----------------------------------------------------------------------
 278  */
 279
 280 int flash_erase (flash_info_t * info, int s_first, int s_last)
 281 {
 282         int flag, prot, sect;
 283         ulong type, start, last;
 284         int rcode = 0;
 285
 286         if ((s_first < 0) || (s_first > s_last)) {
 287                 if (info->flash_id == FLASH_UNKNOWN) {
 288                         printf ("- missing\n");
 289                 } else {
 290                         printf ("- no sectors to erase\n");
 291                 }
 292                 return 1;
 293         }
 294
 295         type = (info->flash_id & FLASH_VENDMASK);
 296         if ((type != FLASH_MAN_INTEL)) {
 297                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 298                                 info->flash_id);
 299                 return 1;
 300         }
 301
 302         prot = 0;
 303         for (sect = s_first; sect <= s_last; ++sect) {
 304                 if (info->protect[sect]) {
 305                         prot++;
 306                 }
 307         }
 308
 309         if (prot) {
 310                 printf ("- Warning: %d protected sectors will not be erased!\n",
 311                                 prot);
 312         } else {
 313                 printf ("\n");
 314         }
 315
 316         flash_vpp(1);
 317
 318         start = get_timer (0);
 319         last = start;
 320
 321         /* Disable interrupts which might cause a timeout here */
 322         flag = disable_interrupts ();
 323
 324         /* Start erase on unprotected sectors */
 325         for (sect = s_first; sect <= s_last; sect++) {
 326                 if (info->protect[sect] == 0) { /* not protected */
 327                         FPWV *addr = (FPWV *) (info->start[sect]);
 328                         FPW status;
 329
 330                         printf ("Erasing sector %2d ... ", sect);
 331
 332                         flash_unprotect_sectors (addr);
 333
 334                         /* arm simple, non interrupt dependent timer */
 335                         reset_timer_masked ();
 336
 337                         *addr = (FPW) 0x00500050;/* clear status register */
 338                         *addr = (FPW) 0x00200020;/* erase setup */
 339                         *addr = (FPW) 0x00D000D0;/* erase confirm */
 340
 341                         while (((status =
 342                                 *addr) & (FPW) 0x00800080) !=
 343                                 (FPW) 0x00800080) {
 344                                         if (get_timer_masked () >
 345                                         CONFIG_SYS_FLASH_ERASE_TOUT) {
 346                                         printf ("Timeout\n");
 347                                         /* suspend erase     */
 348                                         *addr = (FPW) 0x00B000B0;
 349                                         /* reset to read mode */
 350                                         *addr = (FPW) 0x00FF00FF;
 351                                         rcode = 1;
 352                                         break;
 353                                 }
 354                         }
 355
 356                         /* clear status register cmd.   */
 357                         *addr = (FPW) 0x00500050;
 358                         *addr = (FPW) 0x00FF00FF;/* resest to read mode */
 359                         printf (" done\n");
 360                 }
 361         }
 362
 363         flash_vpp(0);
 364
 365         return rcode;
 366 }
 367
 368 /*-----------------------------------------------------------------------
 369  * Copy memory to flash, returns:
 370  * 0 - OK
 371  * 1 - write timeout
 372  * 2 - Flash not erased
 373  * 4 - Flash not identified
 374  */
 375
 376 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 377 {
 378         ulong cp, wp;
 379         FPW data;
 380         int count, i, l, rc, port_width;
 381
 382         if (info->flash_id == FLASH_UNKNOWN) {
 383                 return 4;
 384         }
 385 /* get lower word aligned address */
 386 #ifdef FLASH_PORT_WIDTH16
 387         wp = (addr & ~1);
 388         port_width = 2;
 389 #else
 390         wp = (addr & ~3);
 391         port_width = 4;
 392 #endif
 393
 394         flash_vpp(1);
 395
 396         /*
 397          * handle unaligned start bytes
 398          */
 399         if ((l = addr - wp) != 0) {
 400                 data = 0;
 401                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 402                         data = (data << 8) | (*(uchar *) cp);
 403                 }
 404                 for (; i < port_width && cnt > 0; ++i) {
 405                         data = (data << 8) | *src++;
 406                         --cnt;
 407                         ++cp;
 408                 }
 409                 for (; cnt == 0 && i < port_width; ++i, ++cp) {
 410                         data = (data << 8) | (*(uchar *) cp);
 411                 }
 412
 413                 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
 414                         flash_vpp(0);
 415                         return (rc);
 416                 }
 417                 wp += port_width;
 418         }
 419
 420         /*
 421          * handle word aligned part
 422          */
 423         count = 0;
 424         while (cnt >= port_width) {
 425                 data = 0;
 426                 for (i = 0; i < port_width; ++i) {
 427                         data = (data << 8) | *src++;
 428                 }
 429                 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
 430                         flash_vpp(0);
 431                         return (rc);
 432                 }
 433                 wp += port_width;
 434                 cnt -= port_width;
 435                 if (count++ > 0x800) {
 436                         spin_wheel ();
 437                         count = 0;
 438                 }
 439         }
 440
 441         if (cnt == 0) {
 442                 flash_vpp(0);
 443                 return (0);
 444         }
 445
 446         /*
 447          * handle unaligned tail bytes
 448          */
 449         data = 0;
 450         for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
 451                 data = (data << 8) | *src++;
 452                 --cnt;
 453         }
 454         for (; i < port_width; ++i, ++cp) {
 455                 data = (data << 8) | (*(uchar *) cp);
 456         }
 457
 458         rc = write_data (info, wp, SWAP (data));
 459
 460         flash_vpp(0);
 461
 462         return rc;
 463 }
 464
 465 /*-----------------------------------------------------------------------
 466  * Write a word or halfword to Flash, returns:
 467  * 0 - OK
 468  * 1 - write timeout
 469  * 2 - Flash not erased
 470  */
 471 static int write_data (flash_info_t * info, ulong dest, FPW data)
 472 {
 473         FPWV *addr = (FPWV *) dest;
 474         ulong status;
 475         int flag;
 476
 477         /* Check if Flash is (sufficiently) erased */
 478         if ((*addr & data) != data) {
 479                 printf ("not erased at %08lx (%lx)\n", (ulong) addr, (ulong) *addr);
 480                 return (2);
 481         }
 482
 483         flash_vpp(1);
 484
 485         flash_unprotect_sectors (addr);
 486         /* Disable interrupts which might cause a timeout here */
 487         flag = disable_interrupts ();
 488         *addr = (FPW) 0x00400040;       /* write setup */
 489         *addr = data;
 490
 491         /* arm simple, non interrupt dependent timer */
 492         reset_timer_masked ();
 493
 494         /* wait while polling the status register */
 495         while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
 496                 if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
 497                         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 498                         flash_vpp(0);
 499                         return (1);
 500                 }
 501         }
 502         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 503         flash_vpp(0);
 504         return (0);
 505 }
 506
 507 void inline spin_wheel (void)
 508 {
 509         static int p = 0;
 510         static char w[] = "\\/-";
 511
 512         printf ("\010%c", w[p]);
 513         (++p == 3) ? (p = 0) : 0;
 514 }