board/siemens/IAD210/flash.c

   1 /*
   2  * (C) Copyright 2000, 2001, 2002
   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 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
  28
  29 /*-----------------------------------------------------------------------
  30  * Functions
  31  */
  32 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  33 static int write_word (flash_info_t *info, ulong dest, ulong data);
  34 static void flash_get_offsets (ulong base, flash_info_t *info);
  35
  36 /*-----------------------------------------------------------------------
  37  */
  38
  39 unsigned long flash_init (void)
  40 {
  41   volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  42   volatile memctl8xx_t *memctl = &immap->im_memctl;
  43   unsigned long size;
  44   int i;
  45
  46   /* Init: no FLASHes known */
  47   for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  48     flash_info[i].flash_id = FLASH_UNKNOWN;
  49   }
  50
  51   /* Static FLASH Bank configuration here - FIXME XXX */
  52
  53   size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  54
  55   if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  56     printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  57                         size, size<<20);
  58   }
  59
  60
  61   /* Remap FLASH according to real size */
  62   memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  63   memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
  64
  65   /* Re-do sizing to get full correct info */
  66   size = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  67
  68   flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
  69
  70   flash_info[0].size = size;
  71
  72   return (size);
  73 }
  74
  75 /*-----------------------------------------------------------------------
  76  */
  77 static void flash_get_offsets (ulong base, flash_info_t *info)
  78 {
  79   int i;
  80
  81   /* set up sector start address table */
  82   if (info->flash_id & FLASH_BTYPE) {
  83     /* set sector offsets for bottom boot block type    */
  84     info->start[0] = base + 0x00000000;
  85     info->start[1] = base + 0x00008000;
  86     info->start[2] = base + 0x0000C000;
  87     info->start[3] = base + 0x00010000;
  88     for (i = 4; i < info->sector_count; i++) {
  89       info->start[i] = base + (i * 0x00020000) - 0x00060000;
  90     }
  91   } else {
  92     /* set sector offsets for top boot block type               */
  93     i = info->sector_count - 1;
  94     info->start[i--] = base + info->size - 0x00008000;
  95     info->start[i--] = base + info->size - 0x0000C000;
  96     info->start[i--] = base + info->size - 0x00010000;
  97     for (; i >= 0; i--) {
  98       info->start[i] = base + i * 0x00020000;
  99     }
 100   }
 101
 102 }
 103
 104 /*-----------------------------------------------------------------------
 105  */
 106 void flash_print_info  (flash_info_t *info)
 107 {
 108   int i;
 109
 110   if (info->flash_id == FLASH_UNKNOWN) {
 111     printf ("missing or unknown FLASH type\n");
 112     return;
 113   }
 114
 115   switch (info->flash_id & FLASH_VENDMASK) {
 116   case FLASH_MAN_AMD:   printf ("AMD ");                break;
 117   case FLASH_MAN_FUJ:   printf ("FUJITSU ");            break;
 118   default:              printf ("Unknown Vendor ");     break;
 119   }
 120
 121   switch (info->flash_id & FLASH_TYPEMASK) {
 122   case FLASH_AM400B:    printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
 123     break;
 124   case FLASH_AM400T:    printf ("AM29LV400T (4 Mbit, top boot sector)\n");
 125     break;
 126   case FLASH_AM800B:    printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
 127     break;
 128   case FLASH_AM800T:    printf ("AM29LV800T (8 Mbit, top boot sector)\n");
 129     break;
 130   case FLASH_AM160B:    printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
 131     break;
 132   case FLASH_AM160T:    printf ("AM29LV160T (16 Mbit, top boot sector)\n");
 133     break;
 134   case FLASH_AM320B:    printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
 135     break;
 136   case FLASH_AM320T:    printf ("AM29LV320T (32 Mbit, top boot sector)\n");
 137     break;
 138   default:              printf ("Unknown Chip Type\n");
 139     break;
 140   }
 141
 142   printf ("  Size: %ld MB in %d Sectors\n",
 143           info->size >> 20, info->sector_count);
 144
 145   printf ("  Sector Start Addresses:");
 146   for (i=0; i<info->sector_count; ++i) {
 147     if ((i % 5) == 0)
 148       printf ("\n   ");
 149     printf (" %08lX%s",
 150                         info->start[i],
 151                         info->protect[i] ? " (RO)" : "     "
 152             );
 153   }
 154   printf ("\n");
 155 }
 156
 157 /*-----------------------------------------------------------------------
 158  */
 159
 160
 161 /*-----------------------------------------------------------------------
 162  */
 163
 164 /*
 165  * The following code cannot be run from FLASH!
 166  */
 167
 168 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 169 {
 170   short i;
 171   ulong value;
 172   ulong base = (ulong)addr;
 173
 174
 175   /* Write auto select command: read Manufacturer ID */
 176   addr[0x0555] = 0x00AA00AA;
 177   addr[0x02AA] = 0x00550055;
 178   addr[0x0555] = 0x00900090;
 179
 180   value = addr[0];
 181
 182   switch (value) {
 183   case AMD_MANUFACT:
 184     info->flash_id = FLASH_MAN_AMD;
 185     break;
 186   case FUJ_MANUFACT:
 187     info->flash_id = FLASH_MAN_FUJ;
 188     break;
 189   default:
 190     info->flash_id = FLASH_UNKNOWN;
 191     info->sector_count = 0;
 192     info->size = 0;
 193     return (0);                 /* no or unknown flash  */
 194   }
 195
 196   value = addr[1];                      /* device ID            */
 197
 198   switch (value) {
 199   case AMD_ID_LV400T:
 200     info->flash_id += FLASH_AM400T;
 201     info->sector_count = 11;
 202     info->size = 0x00100000;
 203     break;                              /* => 1 MB              */
 204
 205   case AMD_ID_LV400B:
 206     info->flash_id += FLASH_AM400B;
 207     info->sector_count = 11;
 208     info->size = 0x00100000;
 209     break;                              /* => 1 MB              */
 210
 211   case AMD_ID_LV800T:
 212     info->flash_id += FLASH_AM800T;
 213     info->sector_count = 19;
 214     info->size = 0x00200000;
 215     break;                              /* => 2 MB              */
 216
 217   case AMD_ID_LV800B:
 218     info->flash_id += FLASH_AM800B;
 219     info->sector_count = 19;
 220     info->size = 0x00200000;
 221     break;                              /* => 2 MB              */
 222
 223   case AMD_ID_LV160T:
 224     info->flash_id += FLASH_AM160T;
 225     info->sector_count = 35;
 226     info->size = 0x00400000;
 227     break;                              /* => 4 MB              */
 228
 229   case AMD_ID_LV160B:
 230     info->flash_id += FLASH_AM160B;
 231     info->sector_count = 35;
 232     info->size = 0x00400000;
 233     break;                              /* => 4 MB              */
 234 #if 0   /* enable when device IDs are available */
 235   case AMD_ID_LV320T:
 236     info->flash_id += FLASH_AM320T;
 237     info->sector_count = 67;
 238     info->size = 0x00800000;
 239     break;                              /* => 8 MB              */
 240
 241   case AMD_ID_LV320B:
 242     info->flash_id += FLASH_AM320B;
 243     info->sector_count = 67;
 244     info->size = 0x00800000;
 245     break;                              /* => 8 MB              */
 246 #endif
 247   default:
 248     info->flash_id = FLASH_UNKNOWN;
 249     return (0);                 /* => no or unknown flash */
 250
 251   }
 252
 253   /* set up sector start address table */
 254   if (info->flash_id & FLASH_BTYPE) {
 255     /* set sector offsets for bottom boot block type    */
 256     info->start[0] = base + 0x00000000;
 257     info->start[1] = base + 0x00008000;
 258     info->start[2] = base + 0x0000C000;
 259     info->start[3] = base + 0x00010000;
 260     for (i = 4; i < info->sector_count; i++) {
 261       info->start[i] = base + (i * 0x00020000) - 0x00060000;
 262     }
 263   } else {
 264     /* set sector offsets for top boot block type               */
 265     i = info->sector_count - 1;
 266     info->start[i--] = base + info->size - 0x00008000;
 267     info->start[i--] = base + info->size - 0x0000C000;
 268     info->start[i--] = base + info->size - 0x00010000;
 269     for (; i >= 0; i--) {
 270       info->start[i] = base + i * 0x00020000;
 271     }
 272   }
 273
 274   /* check for protected sectors */
 275   for (i = 0; i < info->sector_count; i++) {
 276     /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 277     /* D0 = 1 if protected */
 278     addr = (volatile unsigned long *)(info->start[i]);
 279     info->protect[i] = addr[2] & 1;
 280   }
 281
 282   /*
 283    * Prevent writes to uninitialized FLASH.
 284    */
 285   if (info->flash_id != FLASH_UNKNOWN) {
 286     addr = (volatile unsigned long *)info->start[0];
 287
 288     *addr = 0x00F000F0; /* reset bank */
 289   }
 290
 291   return (info->size);
 292 }
 293
 294
 295 /*-----------------------------------------------------------------------
 296  */
 297
 298 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 299 {
 300   vu_long *addr = (vu_long*)(info->start[0]);
 301   int flag, prot, sect, l_sect;
 302   ulong start, now, last;
 303
 304   if ((s_first < 0) || (s_first > s_last)) {
 305     if (info->flash_id == FLASH_UNKNOWN) {
 306       printf ("- missing\n");
 307     } else {
 308       printf ("- no sectors to erase\n");
 309     }
 310     return 1;
 311   }
 312
 313   if ((info->flash_id == FLASH_UNKNOWN) ||
 314       (info->flash_id > FLASH_AMD_COMP)) {
 315     printf ("Can't erase unknown flash type %08lx - aborted\n",
 316                         info->flash_id);
 317     return 1;
 318   }
 319
 320   prot = 0;
 321   for (sect=s_first; sect<=s_last; ++sect) {
 322     if (info->protect[sect]) {
 323       prot++;
 324     }
 325   }
 326
 327   if (prot) {
 328     printf ("- Warning: %d protected sectors will not be erased!\n",
 329                         prot);
 330   } else {
 331     printf ("\n");
 332   }
 333
 334   l_sect = -1;
 335
 336   /* Disable interrupts which might cause a timeout here */
 337   flag = disable_interrupts();
 338
 339   addr[0x0555] = 0x00AA00AA;
 340   addr[0x02AA] = 0x00550055;
 341   addr[0x0555] = 0x00800080;
 342   addr[0x0555] = 0x00AA00AA;
 343   addr[0x02AA] = 0x00550055;
 344
 345   /* Start erase on unprotected sectors */
 346   for (sect = s_first; sect<=s_last; sect++) {
 347     if (info->protect[sect] == 0) {     /* not protected */
 348       addr = (vu_long*)(info->start[sect]);
 349       addr[0] = 0x00300030;
 350       l_sect = sect;
 351     }
 352   }
 353
 354   /* re-enable interrupts if necessary */
 355   if (flag)
 356     enable_interrupts();
 357
 358   /* wait at least 80us - let's wait 1 ms */
 359   udelay (1000);
 360
 361   /*
 362    * We wait for the last triggered sector
 363    */
 364   if (l_sect < 0)
 365     goto DONE;
 366
 367   start = get_timer (0);
 368   last  = start;
 369   addr = (vu_long*)(info->start[l_sect]);
 370   while ((addr[0] & 0x00800080) != 0x00800080) {
 371     if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 372       printf ("Timeout\n");
 373       return 1;
 374     }
 375     /* show that we're waiting */
 376     if ((now - last) > 1000) {  /* every second */
 377       putc ('.');
 378       last = now;
 379     }
 380   }
 381
 382  DONE:
 383   /* reset to read mode */
 384   addr = (volatile unsigned long *)info->start[0];
 385   addr[0] = 0x00F000F0; /* reset bank */
 386
 387   printf (" done\n");
 388   return 0;
 389 }
 390
 391 /*-----------------------------------------------------------------------
 392  * Copy memory to flash, returns:
 393  * 0 - OK
 394  * 1 - write timeout
 395  * 2 - Flash not erased
 396  */
 397
 398 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 399 {
 400   ulong cp, wp, data;
 401   int i, l, rc;
 402
 403   wp = (addr & ~3);     /* get lower word aligned address */
 404
 405   /*
 406    * handle unaligned start bytes
 407    */
 408   if ((l = addr - wp) != 0) {
 409     data = 0;
 410     for (i=0, cp=wp; i<l; ++i, ++cp) {
 411       data = (data << 8) | (*(uchar *)cp);
 412     }
 413     for (; i<4 && cnt>0; ++i) {
 414       data = (data << 8) | *src++;
 415       --cnt;
 416       ++cp;
 417     }
 418     for (; cnt==0 && i<4; ++i, ++cp) {
 419       data = (data << 8) | (*(uchar *)cp);
 420     }
 421
 422     if ((rc = write_word(info, wp, data)) != 0) {
 423       return (rc);
 424     }
 425     wp += 4;
 426   }
 427
 428   /*
 429    * handle word aligned part
 430    */
 431   while (cnt >= 4) {
 432     data = 0;
 433     for (i=0; i<4; ++i) {
 434       data = (data << 8) | *src++;
 435     }
 436     if ((rc = write_word(info, wp, data)) != 0) {
 437       return (rc);
 438     }
 439     wp  += 4;
 440     cnt -= 4;
 441   }
 442
 443   if (cnt == 0) {
 444     return (0);
 445   }
 446
 447   /*
 448    * handle unaligned tail bytes
 449    */
 450   data = 0;
 451   for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 452     data = (data << 8) | *src++;
 453     --cnt;
 454   }
 455   for (; i<4; ++i, ++cp) {
 456     data = (data << 8) | (*(uchar *)cp);
 457   }
 458
 459   return (write_word(info, wp, data));
 460 }
 461
 462 /*-----------------------------------------------------------------------
 463  * Write a word to Flash, returns:
 464  * 0 - OK
 465  * 1 - write timeout
 466  * 2 - Flash not erased
 467  */
 468 static int write_word (flash_info_t *info, ulong dest, ulong data)
 469 {
 470   vu_long *addr = (vu_long*)(info->start[0]);
 471   ulong start;
 472   int flag;
 473
 474   /* Check if Flash is (sufficiently) erased */
 475   if ((*((vu_long *)dest) & data) != data) {
 476     return (2);
 477   }
 478   /* Disable interrupts which might cause a timeout here */
 479   flag = disable_interrupts();
 480
 481   addr[0x0555] = 0x00AA00AA;
 482   addr[0x02AA] = 0x00550055;
 483   addr[0x0555] = 0x00A000A0;
 484
 485   *((vu_long *)dest) = data;
 486
 487   /* re-enable interrupts if necessary */
 488   if (flag)
 489     enable_interrupts();
 490
 491   /* data polling for D7 */
 492   start = get_timer (0);
 493   while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
 494     if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 495       return (1);
 496     }
 497   }
 498   return (0);
 499 }
 500
 501 /*-----------------------------------------------------------------------
 502  */