board/ids8247/flash.c

   1 /*
   2  * (C) Copyright 2005
   3  * Heiko Schocher, DENX Software Engineering, <hs@denx.de>
   4  *
   5  * (C) Copyright 2001
   6  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
   7  *
   8  * (C) Copyright 2001-2005
   9  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  10  *
  11  * See file CREDITS for list of people who contributed to this
  12  * project.
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License as
  16  * published by the Free Software Foundation; either version 2 of
  17  * the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27  * MA 02111-1307 USA
  28  */
  29
  30 #undef DEBUG
  31
  32 #include <common.h>
  33
  34 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips    */
  35
  36 #if defined(CFG_ENV_IS_IN_FLASH)
  37 # ifndef  CFG_ENV_ADDR
  38 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  39 # endif
  40 # ifndef  CFG_ENV_SIZE
  41 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  42 # endif
  43 # ifndef  CFG_ENV_SECT_SIZE
  44 #  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
  45 # endif
  46 #endif
  47
  48 /*-----------------------------------------------------------------------
  49  * Protection Flags:
  50  */
  51 #define FLAG_PROTECT_SET        0x01
  52 #define FLAG_PROTECT_CLEAR      0x02
  53
  54 /* Board support for 1 or 2 flash devices */
  55 #undef FLASH_PORT_WIDTH32
  56 #undef FLASH_PORT_WIDTH16
  57 #define FLASH_PORT_WIDTH8
  58
  59 #ifdef FLASH_PORT_WIDTH16
  60 #define FLASH_PORT_WIDTH        ushort
  61 #define FLASH_PORT_WIDTHV       vu_short
  62 #elif FLASH_PORT_WIDTH32
  63 #define FLASH_PORT_WIDTH        ulong
  64 #define FLASH_PORT_WIDTHV       vu_long
  65 #else /* FLASH_PORT_WIDTH8 */
  66 #define FLASH_PORT_WIDTH        uchar
  67 #define FLASH_PORT_WIDTHV       vu_char
  68 #endif
  69
  70 #define FPW                     FLASH_PORT_WIDTH
  71 #define FPWV                    FLASH_PORT_WIDTHV
  72
  73 /*-----------------------------------------------------------------------
  74  * Functions
  75  */
  76 static ulong flash_get_size (FPWV * addr, flash_info_t * info);
  77 static int write_data (flash_info_t * info, ulong dest, FPW data);
  78 static void flash_get_offsets (ulong base, flash_info_t * info);
  79
  80 /*-----------------------------------------------------------------------
  81  */
  82
  83 unsigned long flash_init (void)
  84 {
  85         unsigned long size_b0;
  86         int i;
  87         volatile immap_t * immr = (immap_t *)CFG_IMMR;
  88         volatile memctl8260_t *memctl = &immr->im_memctl;
  89
  90         /* Init: no FLASHes known */
  91         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
  92                 flash_info[i].flash_id = FLASH_UNKNOWN;
  93         }
  94
  95         /* Static FLASH Bank configuration here - FIXME XXX */
  96         size_b0 = flash_get_size ((FPW *) CFG_FLASH0_BASE, &flash_info[0]);
  97
  98         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  99                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 100                         size_b0, size_b0 << 20);
 101         }
 102
 103         memctl->memc_or0 = 0xff800060;
 104         memctl->memc_br0 = 0xff800801;
 105
 106         flash_get_offsets (0xff800000, &flash_info[0]);
 107
 108 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
 109         /* monitor protection ON by default */
 110         (void) flash_protect (FLAG_PROTECT_SET,
 111                                 CFG_MONITOR_BASE,
 112                                 CFG_MONITOR_BASE + monitor_flash_len - 1,
 113                                 &flash_info[0]);
 114 #endif
 115
 116 #ifdef  CFG_ENV_IS_IN_FLASH
 117         /* ENV protection ON by default */
 118         flash_protect (FLAG_PROTECT_SET,
 119                         CFG_ENV_ADDR,
 120                         CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
 121                         &flash_info[0]);
 122 #endif
 123
 124         flash_info[0].size = size_b0;
 125
 126         return (size_b0);
 127 }
 128
 129 /*-----------------------------------------------------------------------
 130  */
 131 static void flash_get_offsets (ulong base, flash_info_t * info)
 132 {
 133         int i;
 134
 135         if (info->flash_id == FLASH_UNKNOWN) {
 136                 return;
 137         }
 138
 139         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
 140                 for (i = 0; i < info->sector_count; i++) {
 141                         info->start[i] = base + (i * 0x00020000);
 142                 }
 143         }
 144 }
 145
 146 /*-----------------------------------------------------------------------
 147  */
 148 void flash_print_info (flash_info_t * info)
 149 {
 150         int i;
 151
 152         if (info->flash_id == FLASH_UNKNOWN) {
 153                 printf ("missing or unknown FLASH type\n");
 154                 return;
 155         }
 156
 157         switch (info->flash_id & FLASH_VENDMASK) {
 158         case FLASH_MAN_INTEL:
 159                 printf ("INTEL ");
 160                 break;
 161         default:
 162                 printf ("Unknown Vendor ");
 163                 break;
 164         }
 165
 166         switch (info->flash_id & FLASH_TYPEMASK) {
 167         case FLASH_28F320J3A:
 168                 printf ("28F320J3A\n");
 169                 break;
 170         case FLASH_28F640J3A:
 171                 printf ("28F640J3A\n");
 172                 break;
 173         case FLASH_28F128J3A:
 174                 printf ("28F128J3A\n");
 175                 break;
 176         default:
 177                 printf ("Unknown Chip Type\n");
 178                 break;
 179         }
 180
 181         printf ("  Size: %ld MB in %d Sectors\n",
 182                         info->size >> 20, info->sector_count);
 183
 184         printf ("  Sector Start Addresses:");
 185         for (i = 0; i < info->sector_count; ++i) {
 186                 if ((i % 5) == 0)
 187                         printf ("\n   ");
 188                 printf (" %08lX%s",
 189                         info->start[i],
 190                         info->protect[i] ? " (RO)" : "     ");
 191         }
 192         printf ("\n");
 193         return;
 194 }
 195
 196 /*-----------------------------------------------------------------------
 197  */
 198
 199
 200 /*-----------------------------------------------------------------------
 201  */
 202
 203 /*
 204  * The following code cannot be run from FLASH!
 205  */
 206
 207 static ulong flash_get_size (FPWV * addr, flash_info_t * info)
 208 {
 209         FPW value;
 210
 211         addr[0] = (FPW) 0x00900090;
 212
 213         value = addr[0];
 214
 215         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
 216
 217         switch (value) {
 218         case (FPW) INTEL_MANUFACT:
 219                 info->flash_id = FLASH_MAN_INTEL;
 220                 break;
 221         default:
 222                 info->flash_id = FLASH_UNKNOWN;
 223                 info->sector_count = 0;
 224                 info->size = 0;
 225                 addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 226                 return (0);                     /* no or unknown flash  */
 227         }
 228
 229 #ifdef FLASH_PORT_WIDTH8
 230         value = addr[2];                        /* device ID        */
 231 #else
 232         value = addr[1];                        /* device ID        */
 233 #endif
 234
 235         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
 236
 237         switch (value) {
 238         case (FPW) INTEL_ID_28F320J3A:
 239                 info->flash_id += FLASH_28F320J3A;
 240                 info->sector_count = 32;
 241                 info->size = 0x00400000;
 242                 break;                          /* => 4 MB     */
 243
 244         case (FPW) INTEL_ID_28F640J3A:
 245                 info->flash_id += FLASH_28F640J3A;
 246                 info->sector_count = 64;
 247                 info->size = 0x00800000;
 248                 break;                          /* => 8 MB     */
 249
 250         case (FPW) INTEL_ID_28F128J3A:
 251                 info->flash_id += FLASH_28F128J3A;
 252                 info->sector_count = 128;
 253                 info->size = 0x01000000;
 254                 break;                          /* => 16 MB     */
 255
 256         default:
 257                 info->flash_id = FLASH_UNKNOWN;
 258                 break;
 259         }
 260
 261         if (info->sector_count > CFG_MAX_FLASH_SECT) {
 262                 printf ("** ERROR: sector count %d > max (%d) **\n",
 263                                 info->sector_count, CFG_MAX_FLASH_SECT);
 264                 info->sector_count = CFG_MAX_FLASH_SECT;
 265         }
 266
 267         addr[0] = (FPW) 0x00FF00FF;     /* restore read mode */
 268
 269         return (info->size);
 270 }
 271
 272
 273 /*-----------------------------------------------------------------------
 274  */
 275
 276 int flash_erase (flash_info_t * info, int s_first, int s_last)
 277 {
 278         int flag, prot, sect;
 279         ulong type, start, now, last;
 280         int rcode = 0;
 281
 282         if ((s_first < 0) || (s_first > s_last)) {
 283                 if (info->flash_id == FLASH_UNKNOWN) {
 284                         printf ("- missing\n");
 285                 } else {
 286                         printf ("- no sectors to erase\n");
 287                 }
 288                 return 1;
 289         }
 290
 291         type = (info->flash_id & FLASH_VENDMASK);
 292         if ((type != FLASH_MAN_INTEL)) {
 293                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 294                         info->flash_id);
 295                 return 1;
 296         }
 297
 298         prot = 0;
 299         for (sect = s_first; sect <= s_last; ++sect) {
 300                 if (info->protect[sect]) {
 301                         prot++;
 302                 }
 303         }
 304
 305         if (prot) {
 306                 printf ("- Warning: %d protected sectors will not be erased!\n",
 307                         prot);
 308         } else {
 309                 printf ("\n");
 310         }
 311
 312         start = get_timer (0);
 313         last = start;
 314         /* Start erase on unprotected sectors */
 315         for (sect = s_first; sect <= s_last; sect++) {
 316                 if (info->protect[sect] == 0) { /* not protected */
 317                         FPWV *addr = (FPWV *) (info->start[sect]);
 318                         FPW status;
 319
 320                         /* Disable interrupts which might cause a timeout here */
 321                         flag = disable_interrupts ();
 322
 323                         *addr = (FPW) 0x00500050;       /* clear status register */
 324                         *addr = (FPW) 0x00200020;       /* erase setup */
 325                         *addr = (FPW) 0x00D000D0;       /* erase confirm */
 326
 327                         /* re-enable interrupts if necessary */
 328                         if (flag)
 329                                 enable_interrupts ();
 330
 331                         /* wait at least 80us - let's wait 1 ms */
 332                         udelay (1000);
 333
 334                         while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
 335                             if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
 336                                 printf ("Timeout\n");
 337                                 *addr = (FPW) 0x00B000B0;       /* suspend erase     */
 338                                 *addr = (FPW) 0x00FF00FF;       /* reset to read mode */
 339                                 rcode = 1;
 340                                 break;
 341                             }
 342
 343                             /* show that we're waiting */
 344                             if ((now - last) > 1000) {  /* every second */
 345                                 putc ('.');
 346                                 last = now;
 347                             }
 348                         }
 349
 350                         *addr = (FPW) 0x00FF00FF;       /* reset to read mode */
 351                 }
 352         }
 353         printf (" done\n");
 354         return rcode;
 355 }
 356
 357 /*-----------------------------------------------------------------------
 358  * Copy memory to flash, returns:
 359  * 0 - OK
 360  * 1 - write timeout
 361  * 2 - Flash not erased
 362  * 4 - Flash not identified
 363  */
 364
 365 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 366 {
 367         ulong cp, wp;
 368         FPW data;
 369
 370         int i, l, rc, port_width;
 371
 372         if (info->flash_id == FLASH_UNKNOWN) {
 373                 return 4;
 374         }
 375 /* get lower word aligned address */
 376 #ifdef FLASH_PORT_WIDTH16
 377         wp = (addr & ~1);
 378         port_width = 2;
 379 #elif defined(FLASH_PORT_WIDTH32)
 380         wp = (addr & ~3);
 381         port_width = 4;
 382 #else
 383         wp = addr;
 384         port_width = 1;
 385 #endif
 386
 387         /*
 388          * handle unaligned start bytes
 389          */
 390         if ((l = addr - wp) != 0) {
 391                 data = 0;
 392                 for (i = 0, cp = wp; i < l; ++i, ++cp) {
 393                         data = (data << 8) | (*(uchar *) cp);
 394                 }
 395                 for (; i < port_width && cnt > 0; ++i) {
 396                         data = (data << 8) | *src++;
 397                         --cnt;
 398                         ++cp;
 399                 }
 400                 for (; cnt == 0 && i < port_width; ++i, ++cp) {
 401                         data = (data << 8) | (*(uchar *) cp);
 402                 }
 403
 404                 if ((rc = write_data (info, wp, data)) != 0) {
 405                         return (rc);
 406                 }
 407                 wp += port_width;
 408         }
 409
 410         /*
 411          * handle word aligned part
 412          */
 413         while (cnt >= port_width) {
 414                 data = 0;
 415                 for (i = 0; i < port_width; ++i) {
 416                         data = (data << 8) | *src++;
 417                 }
 418                 if ((rc = write_data (info, wp, data)) != 0) {
 419                         return (rc);
 420                 }
 421                 wp += port_width;
 422                 cnt -= port_width;
 423         }
 424
 425         if (cnt == 0) {
 426                 return (0);
 427         }
 428
 429         /*
 430          * handle unaligned tail bytes
 431          */
 432         data = 0;
 433         for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
 434                 data = (data << 8) | *src++;
 435                 --cnt;
 436         }
 437         for (; i < port_width; ++i, ++cp) {
 438                 data = (data << 8) | (*(uchar *) cp);
 439         }
 440
 441         return (write_data (info, wp, data));
 442 }
 443
 444 /*-----------------------------------------------------------------------
 445  * Write a word or halfword to Flash, returns:
 446  * 0 - OK
 447  * 1 - write timeout
 448  * 2 - Flash not erased
 449  */
 450 static int write_data (flash_info_t * info, ulong dest, FPW data)
 451 {
 452         FPWV *addr = (FPWV *) dest;
 453         ulong status;
 454         ulong start;
 455         int flag;
 456
 457         /* Check if Flash is (sufficiently) erased */
 458         if ((*addr & data) != data) {
 459                 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
 460                 return (2);
 461         }
 462         /* Disable interrupts which might cause a timeout here */
 463         flag = disable_interrupts ();
 464
 465         *addr = (FPW) 0x00400040;       /* write setup */
 466         *addr = data;
 467
 468         /* re-enable interrupts if necessary */
 469         if (flag)
 470                 enable_interrupts ();
 471
 472         start = get_timer (0);
 473
 474         while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
 475                 if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 476                         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 477                         return (1);
 478                 }
 479         }
 480
 481         *addr = (FPW) 0x00FF00FF;       /* restore read mode */
 482
 483         return (0);
 484 }