board/kup/common/flash.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <mpc8xx.h>
  26
  27 #ifndef CONFIG_ENV_ADDR
  28 #define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  29 #endif
  30
  31 #define CONFIG_FLASH_16BIT
  32
  33 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  34
  35 /*-----------------------------------------------------------------------
  36  * Functions
  37  */
  38 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  39 static int write_word (flash_info_t *info, ulong dest, ulong data);
  40
  41 /*-----------------------------------------------------------------------
  42  */
  43
  44 unsigned long flash_init (void)
  45 {
  46         volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  47         volatile memctl8xx_t *memctl = &immap->im_memctl;
  48         unsigned long size_b0;
  49         int i;
  50
  51         /* Init: no FLASHes known */
  52         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  53                 flash_info[i].flash_id = FLASH_UNKNOWN;
  54         }
  55
  56         /* Static FLASH Bank configuration here - FIXME XXX */
  57
  58         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  59
  60         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  61                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  62                         size_b0, size_b0<<20);
  63         }
  64
  65
  66         /* Remap FLASH according to real size */
  67         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
  68         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V | BR_PS_16;
  69
  70         /* Re-do sizing to get full correct info */
  71         size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  72
  73 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
  74         /* monitor protection ON by default */
  75         flash_protect(FLAG_PROTECT_SET,
  76                       CONFIG_SYS_MONITOR_BASE,
  77                       CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
  78                       &flash_info[0]);
  79 #endif
  80
  81 #ifdef  CONFIG_ENV_IS_IN_FLASH
  82         /* ENV protection ON by default */
  83         flash_protect(FLAG_PROTECT_SET,
  84                       CONFIG_ENV_ADDR,
  85                       CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
  86                       &flash_info[0]);
  87 #endif
  88
  89         flash_info[0].size = size_b0;
  90
  91         return (size_b0);
  92 }
  93
  94 /*-----------------------------------------------------------------------
  95  */
  96 void flash_print_info  (flash_info_t *info)
  97 {
  98         int i;
  99
 100         if (info->flash_id == FLASH_UNKNOWN) {
 101                 printf ("missing or unknown FLASH type\n");
 102                 return;
 103         }
 104
 105         switch (info->flash_id & FLASH_VENDMASK) {
 106         case FLASH_MAN_AMD:     printf ("AMD ");                break;
 107         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
 108         default:                printf ("Unknown Vendor ");     break;
 109         }
 110
 111         switch (info->flash_id & FLASH_TYPEMASK) {
 112         case FLASH_AM400B:      printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 113                                 break;
 114         case FLASH_AM400T:      printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 115                                 break;
 116         case FLASH_AM800B:      printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 117                                 break;
 118         case FLASH_AM800T:      printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 119                                 break;
 120         case FLASH_AM160B:      printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 121                                 break;
 122         case FLASH_AM160T:      printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 123                                 break;
 124         case FLASH_AM320B:      printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 125                                 break;
 126         case FLASH_AM320T:      printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 127                                 break;
 128         default:                printf ("Unknown Chip Type\n");
 129                                 break;
 130         }
 131
 132         printf ("  Size: %ld MB in %d Sectors\n",
 133                 info->size >> 20, info->sector_count);
 134
 135         printf ("  Sector Start Addresses:");
 136         for (i=0; i<info->sector_count; ++i) {
 137                 if ((i % 5) == 0)
 138                         printf ("\n   ");
 139                 printf (" %08lX%s",
 140                         info->start[i],
 141                         info->protect[i] ? " (RO)" : "     "
 142                 );
 143         }
 144         printf ("\n");
 145         return;
 146 }
 147
 148 /*-----------------------------------------------------------------------
 149  */
 150
 151
 152 /*-----------------------------------------------------------------------
 153  */
 154
 155 /*
 156  * The following code cannot be run from FLASH!
 157  */
 158
 159 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 160 {
 161         short i;
 162         ulong value;
 163         ulong base = (ulong)addr;
 164
 165         /* Write auto select command: read Manufacturer ID */
 166         vu_short *s_addr=(vu_short*)addr;
 167         s_addr[0x5555] = 0x00AA;
 168         s_addr[0x2AAA] = 0x0055;
 169         s_addr[0x5555] = 0x0090;
 170
 171         value = s_addr[0];
 172         value = value|(value<<16);
 173
 174         switch (value) {
 175         case AMD_MANUFACT:
 176                 info->flash_id = FLASH_MAN_AMD;
 177                 break;
 178         case FUJ_MANUFACT:
 179                 info->flash_id = FLASH_MAN_FUJ;
 180                 break;
 181         default:
 182                 info->flash_id = FLASH_UNKNOWN;
 183                 info->sector_count = 0;
 184                 info->size = 0;
 185                 return (0);                     /* no or unknown flash  */
 186         }
 187
 188         value = s_addr[1];
 189         value = value|(value<<16);
 190
 191                 switch (value) {
 192         case FUJI_ID_29F800BA:
 193                 info->flash_id += FLASH_AM400T;
 194                 info->sector_count = 19;
 195                 info->size = 0x00100000;
 196                 break;                          /* => 1 MB              */
 197         case AMD_ID_LV800T:
 198                 info->flash_id += FLASH_AM800T;
 199                 info->sector_count = 19;
 200                 info->size = 0x00100000;
 201                 break;                          /* => 1 MB              */
 202         case AMD_ID_LV800B:
 203                 info->flash_id += FLASH_AM800B;
 204                 info->sector_count = 19;
 205                 info->size = 0x00100000;
 206                 break;                          /* => 1 MB              */
 207         default:
 208                 info->flash_id = FLASH_UNKNOWN;
 209                 return (0);                     /* => no or unknown flash */
 210         }
 211
 212         /* set up sector start address table */
 213         /* set sector offsets for bottom boot block type        */
 214         info->start[0] = base + 0x00000000;
 215         info->start[1] = base + 0x00004000;
 216         info->start[2] = base + 0x00006000;
 217         info->start[3] = base + 0x00008000;
 218         for (i = 4; i < info->sector_count; i++) {
 219                 info->start[i] = base + (i * 0x00010000) - 0x00030000;
 220         }
 221
 222
 223         /* check for protected sectors */
 224         for (i = 0; i < info->sector_count; i++) {
 225                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 226                 /* D0 = 1 if protected */
 227                 s_addr = (volatile unsigned short *)(info->start[i]);
 228                 info->protect[i] = s_addr[2] & 1;
 229         }
 230
 231         /*
 232          * Prevent writes to uninitialized FLASH.
 233          */
 234         if (info->flash_id != FLASH_UNKNOWN) {
 235                 s_addr = (volatile unsigned short *)info->start[0];
 236                 *s_addr = 0x00F0;       /* reset bank */
 237         }
 238         return (info->size);
 239 }
 240
 241
 242 /*-----------------------------------------------------------------------
 243  */
 244
 245
 246 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 247 {
 248         vu_long *addr = (vu_long*)(info->start[0]);
 249         int flag, prot, sect;
 250         ulong start, now, last;
 251 #ifdef CONFIG_FLASH_16BIT
 252         vu_short *s_addr = (vu_short*)addr;
 253 #endif
 254
 255         if ((s_first < 0) || (s_first > s_last)) {
 256                 if (info->flash_id == FLASH_UNKNOWN) {
 257                         printf ("- missing\n");
 258                 } else {
 259                         printf ("- no sectors to erase\n");
 260                 }
 261                 return 1;
 262         }
 263 /*#ifndef CONFIG_FLASH_16BIT
 264         ulong type;
 265         type = (info->flash_id & FLASH_VENDMASK);
 266         if ((type != FLASH_MAN_SST) && (type != FLASH_MAN_STM)) {
 267                 printf ("Can't erase unknown flash type %08lx - aborted\n",
 268                         info->flash_id);
 269                 return;
 270         }
 271 #endif*/
 272         prot = 0;
 273         for (sect=s_first; sect<=s_last; ++sect) {
 274                 if (info->protect[sect]) {
 275                         prot++;
 276                 }
 277         }
 278
 279         if (prot) {
 280                 printf ("- Warning: %d protected sectors will not be erased!\n",
 281                         prot);
 282         } else {
 283                 printf ("\n");
 284         }
 285
 286         start = get_timer (0);
 287         last  = start;
 288         /* Start erase on unprotected sectors */
 289         for (sect = s_first; sect<=s_last; sect++) {
 290                 if (info->protect[sect] == 0) { /* not protected */
 291 #ifdef CONFIG_FLASH_16BIT
 292                         vu_short *s_sect_addr = (vu_short*)(info->start[sect]);
 293 #else
 294                         vu_long *sect_addr = (vu_long*)(info->start[sect]);
 295 #endif
 296                         /* Disable interrupts which might cause a timeout here */
 297                         flag = disable_interrupts();
 298
 299 #ifdef CONFIG_FLASH_16BIT
 300
 301                         /*printf("\ns_sect_addr=%x",s_sect_addr);*/
 302                         s_addr[0x5555] = 0x00AA;
 303                         s_addr[0x2AAA] = 0x0055;
 304                         s_addr[0x5555] = 0x0080;
 305                         s_addr[0x5555] = 0x00AA;
 306                         s_addr[0x2AAA] = 0x0055;
 307                         s_sect_addr[0] = 0x0030;
 308 #else
 309                         addr[0x5555] = 0x00AA00AA;
 310                         addr[0x2AAA] = 0x00550055;
 311                         addr[0x5555] = 0x00800080;
 312                         addr[0x5555] = 0x00AA00AA;
 313                         addr[0x2AAA] = 0x00550055;
 314                         sect_addr[0] = 0x00300030;
 315 #endif
 316                         /* re-enable interrupts if necessary */
 317                         if (flag)
 318                                 enable_interrupts();
 319
 320                         /* wait at least 80us - let's wait 1 ms */
 321                         udelay (1000);
 322
 323 #ifdef CONFIG_FLASH_16BIT
 324                         while ((s_sect_addr[0] & 0x0080) != 0x0080) {
 325 #else
 326                         while ((sect_addr[0] & 0x00800080) != 0x00800080) {
 327 #endif
 328                                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 329                                         printf ("Timeout\n");
 330                                         return 1;
 331                                 }
 332                                 /* show that we're waiting */
 333                                 if ((now - last) > 1000) {      /* every second */
 334                                         putc ('.');
 335                                         last = now;
 336                                 }
 337                         }
 338                 }
 339         }
 340
 341         /* reset to read mode */
 342         addr = (volatile unsigned long *)info->start[0];
 343 #ifdef CONFIG_FLASH_16BIT
 344         s_addr[0] = 0x00F0;     /* reset bank */
 345 #else
 346         addr[0] = 0x00F000F0;   /* reset bank */
 347 #endif
 348
 349         printf (" done\n");
 350         return 0;
 351 }
 352
 353
 354 /*-----------------------------------------------------------------------
 355  * Copy memory to flash, returns:
 356  * 0 - OK
 357  * 1 - write timeout
 358  * 2 - Flash not erased
 359  */
 360
 361 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 362 {
 363         ulong cp, wp, data;
 364         int i, l, rc;
 365
 366         wp = (addr & ~3);       /* get lower word aligned address */
 367
 368         /*
 369          * handle unaligned start bytes
 370          */
 371         if ((l = addr - wp) != 0) {
 372                 data = 0;
 373                 for (i=0, cp=wp; i<l; ++i, ++cp) {
 374                         data = (data << 8) | (*(uchar *)cp);
 375                 }
 376                 for (; i<4 && cnt>0; ++i) {
 377                         data = (data << 8) | *src++;
 378                         --cnt;
 379                         ++cp;
 380                 }
 381                 for (; cnt==0 && i<4; ++i, ++cp) {
 382                         data = (data << 8) | (*(uchar *)cp);
 383                 }
 384
 385                 if ((rc = write_word(info, wp, data)) != 0) {
 386                         return (rc);
 387                 }
 388                 wp += 4;
 389         }
 390
 391         /*
 392          * handle word aligned part
 393          */
 394         while (cnt >= 4) {
 395                 data = 0;
 396                 for (i=0; i<4; ++i) {
 397                         data = (data << 8) | *src++;
 398                 }
 399                 if ((rc = write_word(info, wp, data)) != 0) {
 400                         return (rc);
 401                 }
 402                 wp  += 4;
 403                 cnt -= 4;
 404         }
 405
 406         if (cnt == 0) {
 407                 return (0);
 408         }
 409
 410         /*
 411          * handle unaligned tail bytes
 412          */
 413         data = 0;
 414         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 415                 data = (data << 8) | *src++;
 416                 --cnt;
 417         }
 418         for (; i<4; ++i, ++cp) {
 419                 data = (data << 8) | (*(uchar *)cp);
 420         }
 421
 422         return (write_word(info, wp, data));
 423 }
 424
 425
 426 /*-----------------------------------------------------------------------
 427  * Write a word to Flash, returns:
 428  * 0 - OK
 429  * 1 - write timeout
 430  * 2 - Flash not erased
 431  */
 432 static int write_word (flash_info_t *info, ulong dest, ulong data)
 433 {
 434         vu_long *addr = (vu_long*)(info->start[0]);
 435
 436 #ifdef CONFIG_FLASH_16BIT
 437         vu_short high_data;
 438         vu_short low_data;
 439         vu_short *s_addr = (vu_short*)addr;
 440 #endif
 441         ulong start;
 442         int flag;
 443
 444         /* Check if Flash is (sufficiently) erased */
 445         if ((*((vu_long *)dest) & data) != data) {
 446                 return (2);
 447         }
 448
 449 #ifdef CONFIG_FLASH_16BIT
 450         /* Write the 16 higher-bits */
 451         /* Disable interrupts which might cause a timeout here */
 452         flag = disable_interrupts();
 453
 454         high_data = ((data>>16) & 0x0000ffff);
 455
 456         s_addr[0x5555] = 0x00AA;
 457         s_addr[0x2AAA] = 0x0055;
 458         s_addr[0x5555] = 0x00A0;
 459
 460         *((vu_short *)dest) = high_data;
 461
 462
 463         /* re-enable interrupts if necessary */
 464         if (flag)
 465                 enable_interrupts();
 466
 467         /* data polling for D7 */
 468         start = get_timer (0);
 469         while ((*((vu_short *)dest) & 0x0080) != (high_data & 0x0080)) {
 470                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 471                         return (1);
 472                 }
 473         }
 474
 475
 476         /* Write the 16 lower-bits */
 477 #endif
 478
 479         /* Disable interrupts which might cause a timeout here */
 480         flag = disable_interrupts();
 481 #ifdef CONFIG_FLASH_16BIT
 482         dest += 0x2;
 483         low_data = (data & 0x0000ffff);
 484
 485         s_addr[0x5555] = 0x00AA;
 486         s_addr[0x2AAA] = 0x0055;
 487         s_addr[0x5555] = 0x00A0;
 488         *((vu_short *)dest) = low_data;
 489
 490 #else
 491         addr[0x5555] = 0x00AA00AA;
 492         addr[0x2AAA] = 0x00550055;
 493         addr[0x5555] = 0x00A000A0;
 494         *((vu_long *)dest) = data;
 495 #endif
 496
 497         /* re-enable interrupts if necessary */
 498         if (flag)
 499                 enable_interrupts();
 500
 501         /* data polling for D7 */
 502         start = get_timer (0);
 503
 504 #ifdef CONFIG_FLASH_16BIT
 505         while ((*((vu_short *)dest) & 0x0080) != (low_data & 0x0080)) {
 506 #else
 507         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 508 #endif
 509
 510                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 511                         return (1);
 512                 }
 513         }
 514         return (0);
 515 }