board/integratorap/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 #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
  84 /*-----------------------------------------------------------------------
  85  */
  86
  87 unsigned long flash_init (void)
  88 {
  89         int i;
  90         ulong size = 0;
  91         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  92                 switch (i) {
  93                 case 0:
  94                         flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
  95                         flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
  96                         break;
  97                 default:
  98                         panic ("configured too many flash banks!\n");
  99                         break;
 100                 }
 101                 size += flash_info[i].size;
 102         }
 103
 104         /* Protect monitor and environment sectors
 105          */
 106         flash_protect (FLAG_PROTECT_SET,
 107                         CONFIG_SYS_FLASH_BASE,
 108                         CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
 109
 110         return size;
 111 }
 112
 113 /*-----------------------------------------------------------------------
 114  */
 115 static void flash_get_offsets (ulong base, flash_info_t * info)
 116 {
 117         int i;
 118         OrgDef *pOrgDef;
 119
 120         pOrgDef = OrgIntel_28F256L18T;
 121         if (info->flash_id == FLASH_UNKNOWN) {
 122                 return;
 123         }
 124
 125         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
 126                 for (i = 0; i < info->sector_count; i++) {
 127                         if (i > 255) {
 128                                 info->start[i] = base + (i * 0x8000);
 129                                 info->protect[i] = 0;
 130                         } else {
 131                                 info->start[i] = base +
 132                                                 (i * PHYS_FLASH_SECT_SIZE);
 133                                 info->protect[i] = 0;
 134                         }
 135                 }
 136         }
 137 }
 138
 139 /*-----------------------------------------------------------------------
 140  */
 141 void flash_print_info (flash_info_t * info)
 142 {
 143         int i;
 144
 145         if (info->flash_id == FLASH_UNKNOWN) {
 146                 printf ("missing or unknown FLASH type\n");
 147                 return;
 148         }
 149
 150         switch (info->flash_id & FLASH_VENDMASK) {
 151         case FLASH_MAN_INTEL:
 152                 printf ("INTEL ");
 153                 break;
 154         default:
 155                 printf ("Unknown Vendor ");
 156                 break;
 157         }
 158
 159         switch (info->flash_id & FLASH_TYPEMASK) {
 160         case FLASH_28F256L18T:
 161                 printf ("FLASH 28F256L18T\n");
 162                 break;
 163         default:
 164                 printf ("Unknown Chip Type\n");
 165                 break;
 166         }
 167
 168         printf ("  Size: %ld MB in %d Sectors\n",
 169                         info->size >> 20, info->sector_count);
 170
 171         printf ("  Sector Start Addresses:");
 172         for (i = 0; i < info->sector_count; ++i) {
 173                 if ((i % 5) == 0)
 174                         printf ("\n   ");
 175                 printf (" %08lX%s",
 176                         info->start[i], info->protect[i] ? " (RO)" : "     ");
 177         }
 178         printf ("\n");
 179         return;
 180 }
 181
 182 /*
 183  * The following code cannot be run from FLASH!
 184  */
 185 static ulong flash_get_size (FPW * addr, flash_info_t * info)
 186 {
 187         volatile FPW value;
 188
 189         /* Write auto select command: read Manufacturer ID */
 190         addr[0x5555] = (FPW) 0x00AA00AA;
 191         addr[0x2AAA] = (FPW) 0x00550055;
 192         addr[0x5555] = (FPW) 0x00900090;
 193
 194         mb ();
 195         value = addr[0];
 196
 197         switch (value) {
 198
 199         case (FPW) INTEL_MANUFACT:
 200                 info->flash_id = FLASH_MAN_INTEL;
 201                 break;
 202
 203         default:
 204                 info->flash_id = FLASH_UNKNOWN;
 205                 info->sector_count = 0;
 206                 info->size = 0;
 207                 addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 208                 return (0);             /* no or unknown flash  */
 209         }
 210
 211         mb ();
 212         value = addr[1];        /* device ID        */
 213         switch (value) {
 214
 215         case (FPW) (INTEL_ID_28F256L18T):
 216                 info->flash_id += FLASH_28F256L18T;
 217                 info->sector_count = 259;
 218                 info->size = 0x02000000;
 219                 break;                  /* => 32 MB     */
 220
 221         default:
 222                 info->flash_id = FLASH_UNKNOWN;
 223                 break;
 224         }
 225
 226         if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
 227                 printf ("** ERROR: sector count %d > max (%d) **\n",
 228                                 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
 229                 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
 230         }
 231
 232         addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 233
 234         return (info->size);
 235 }
 236
 237
 238 /* unprotects a sector for write and erase
 239  * on some intel parts, this unprotects the entire chip, but it
 240  * wont hurt to call this additional times per sector...
 241  */
 242 void flash_unprotect_sectors (FPWV * addr)
 243 {
 244 #define PD_FINTEL_WSMS_READY_MASK    0x0080
 245
 246         *addr = (FPW) 0x00500050;       /* clear status register */
 247
 248         /* this sends the clear lock bit command */
 249         *addr = (FPW) 0x00600060;
 250         *addr = (FPW) 0x00D000D0;
 251 }
 252
 253
 254 /*-----------------------------------------------------------------------
 255  */
 256
 257 int flash_erase (flash_info_t * info, int s_first, int s_last)
 258 {
 259         int flag, prot, sect;
 260         ulong type, start, last;
 261         int rcode = 0;
 262
 263         if ((s_first < 0) || (s_first > s_last)) {
 264                 if (info->flash_id == FLASH_UNKNOWN) {
 265                         printf ("- missing\n");
 266                 } else {
 267                         printf ("- no sectors to erase\n");
 268                 }
 269                 return 1;
 270         }
 271
 272         type = (info->flash_id & FLASH_VENDMASK);
 273         if ((type != FLASH_MAN_INTEL)) {
 274                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 275                                 info->flash_id);
 276                 return 1;
 277         }
 278
 279         prot = 0;
 280         for (sect = s_first; sect <= s_last; ++sect) {
 281                 if (info->protect[sect]) {
 282                         prot++;
 283                 }
 284         }
 285
 286         if (prot) {
 287                 printf ("- Warning: %d protected sectors will not be erased!\n",
 288                                 prot);
 289         } else {
 290                 printf ("\n");
 291         }
 292
 293
 294         start = get_timer (0);
 295         last = start;
 296
 297         /* Disable interrupts which might cause a timeout here */
 298         flag = disable_interrupts ();
 299
 300         /* Start erase on unprotected sectors */
 301         for (sect = s_first; sect <= s_last; sect++) {
 302                 if (info->protect[sect] == 0) { /* not protected */
 303                         FPWV *addr = (FPWV *) (info->start[sect]);
 304                         FPW status;
 305
 306                         printf ("Erasing sector %2d ... ", sect);
 307
 308                         flash_unprotect_sectors (addr);
 309
 310                         /* arm simple, non interrupt dependent timer */
 311                         reset_timer_masked ();
 312
 313                         *addr = (FPW) 0x00500050;/* clear status register */
 314                         *addr = (FPW) 0x00200020;/* erase setup */
 315                         *addr = (FPW) 0x00D000D0;/* erase confirm */
 316
 317                         while (((status =
 318                                 *addr) & (FPW) 0x00800080) !=
 319                                 (FPW) 0x00800080) {
 320                                         if (get_timer_masked () >
 321                                         CONFIG_SYS_FLASH_ERASE_TOUT) {
 322                                         printf ("Timeout\n");
 323                                         /* suspend erase     */
 324                                         *addr = (FPW) 0x00B000B0;
 325                                         /* reset to read mode */
 326                                         *addr = (FPW) 0x00FF00FF;
 327                                         rcode = 1;
 328                                         break;
 329                                 }
 330                         }
 331
 332                         /* clear status register cmd.   */
 333                         *addr = (FPW) 0x00500050;
 334                         *addr = (FPW) 0x00FF00FF;/* resest to read mode */
 335                         printf (" done\n");
 336                 }
 337         }
 338         return rcode;
 339 }
 340
 341 /*-----------------------------------------------------------------------
 342  * Copy memory to flash, returns:
 343  * 0 - OK
 344  * 1 - write timeout
 345  * 2 - Flash not erased
 346  * 4 - Flash not identified
 347  */
 348
 349 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 350 {
 351         ulong cp, wp;
 352         FPW data;
 353         int count, i, l, rc, port_width;
 354
 355         if (info->flash_id == FLASH_UNKNOWN) {
 356                 return 4;
 357         }
 358 /* get lower word aligned address */
 359 #ifdef FLASH_PORT_WIDTH16
 360         wp = (addr & ~1);
 361         port_width = 2;
 362 #else
 363         wp = (addr & ~3);
 364         port_width = 4;
 365 #endif
 366
 367         /*
 368          * handle unaligned start bytes
 369          */
 370         if ((l = addr - wp) != 0) {
 371                 data = 0;
 372                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 373                         data = (data << 8) | (*(uchar *) cp);
 374                 }
 375                 for (; i < port_width && cnt > 0; ++i) {
 376                         data = (data << 8) | *src++;
 377                         --cnt;
 378                         ++cp;
 379                 }
 380                 for (; cnt == 0 && i < port_width; ++i, ++cp) {
 381                         data = (data << 8) | (*(uchar *) cp);
 382                 }
 383
 384                 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
 385                         return (rc);
 386                 }
 387                 wp += port_width;
 388         }
 389
 390         /*
 391          * handle word aligned part
 392          */
 393         count = 0;
 394         while (cnt >= port_width) {
 395                 data = 0;
 396                 for (i = 0; i < port_width; ++i) {
 397                         data = (data << 8) | *src++;
 398                 }
 399                 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
 400                         return (rc);
 401                 }
 402                 wp += port_width;
 403                 cnt -= port_width;
 404                 if (count++ > 0x800) {
 405                         spin_wheel ();
 406                         count = 0;
 407                 }
 408         }
 409
 410         if (cnt == 0) {
 411                 return (0);
 412         }
 413
 414         /*
 415          * handle unaligned tail bytes
 416          */
 417         data = 0;
 418         for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
 419                 data = (data << 8) | *src++;
 420                 --cnt;
 421         }
 422         for (; i < port_width; ++i, ++cp) {
 423                 data = (data << 8) | (*(uchar *) cp);
 424         }
 425
 426         return (write_data (info, wp, SWAP (data)));
 427 }
 428
 429 /*-----------------------------------------------------------------------
 430  * Write a word or halfword to Flash, returns:
 431  * 0 - OK
 432  * 1 - write timeout
 433  * 2 - Flash not erased
 434  */
 435 static int write_data (flash_info_t * info, ulong dest, FPW data)
 436 {
 437         FPWV *addr = (FPWV *) dest;
 438         ulong status;
 439         int flag;
 440
 441         /* Check if Flash is (sufficiently) erased */
 442         if ((*addr & data) != data) {
 443                 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
 444                 return (2);
 445         }
 446         flash_unprotect_sectors (addr);
 447         /* Disable interrupts which might cause a timeout here */
 448         flag = disable_interrupts ();
 449         *addr = (FPW) 0x00400040;       /* write setup */
 450         *addr = data;
 451
 452         /* arm simple, non interrupt dependent timer */
 453         reset_timer_masked ();
 454
 455         /* wait while polling the status register */
 456         while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
 457                 if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
 458                         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 459                         return (1);
 460                 }
 461         }
 462         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 463         return (0);
 464 }
 465
 466 void inline spin_wheel (void)
 467 {
 468         static int p = 0;
 469         static char w[] = "\\/-";
 470
 471         printf ("\010%c", w[p]);
 472         (++p == 3) ? (p = 0) : 0;
 473 }