board/rpxsuper/flash.c

   1 /*
   2  * (C) Copyright 2000
   3  * Marius Groeger <mgroeger@sysgo.de>
   4  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   5  *
   6  * (C) Copyright 2000
   7  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8  *
   9  * Flash Routines for AMD 29F080B devices
  10  * Added support for 64bit and AMD 29DL323B
  11  *
  12  *--------------------------------------------------------------------
  13  * See file CREDITS for list of people who contributed to this
  14  * project.
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License as
  18  * published by the Free Software Foundation; either version 2 of
  19  * the License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  29  * MA 02111-1307 USA
  30  */
  31
  32 #include <common.h>
  33 #include <mpc8xx.h>
  34 #include <asm/io.h>
  35
  36 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
  37
  38 #define RD_SWP32(x) in_le32((volatile u32*)x)
  39
  40 /*-----------------------------------------------------------------------
  41  * Functions
  42  */
  43
  44 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  45 static int write_word (flash_info_t *info, ulong dest, ulong data);
  46
  47 /*-----------------------------------------------------------------------
  48  */
  49
  50 unsigned long flash_init (void)
  51 {
  52     unsigned long size;
  53     int i;
  54
  55     /* Init: no FLASHes known */
  56     for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
  57         flash_info[i].flash_id = FLASH_UNKNOWN;
  58     }
  59
  60     /* for now, only support the 4 MB Flash SIMM */
  61     size = flash_get_size((vu_long *)CFG_FLASH0_BASE, &flash_info[0]);
  62
  63     /*
  64      * protect monitor and environment sectors
  65      */
  66
  67 #if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
  68     flash_protect(FLAG_PROTECT_SET,
  69                   CFG_MONITOR_BASE,
  70                   CFG_MONITOR_BASE+monitor_flash_len-1,
  71                   &flash_info[0]);
  72 #endif
  73
  74 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
  75 # ifndef  CFG_ENV_SIZE
  76 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  77 # endif
  78     flash_protect(FLAG_PROTECT_SET,
  79                   CFG_ENV_ADDR,
  80                   CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
  81                   &flash_info[0]);
  82 #endif
  83
  84     return /*size*/ (CFG_FLASH0_SIZE * 1024 * 1024);
  85 }
  86
  87 /*-----------------------------------------------------------------------
  88  */
  89 void flash_print_info  (flash_info_t *info)
  90 {
  91     int i;
  92
  93     if (info->flash_id == FLASH_UNKNOWN) {
  94         printf ("missing or unknown FLASH type\n");
  95         return;
  96     }
  97
  98     switch (info->flash_id & FLASH_VENDMASK) {
  99     case (AMD_MANUFACT & FLASH_VENDMASK):
 100         printf ("AMD ");
 101         break;
 102     case (FUJ_MANUFACT & FLASH_VENDMASK):
 103         printf ("FUJITSU ");
 104         break;
 105     case (SST_MANUFACT & FLASH_VENDMASK):
 106         printf ("SST ");
 107         break;
 108     default:
 109         printf ("Unknown Vendor ");
 110         break;
 111     }
 112
 113     switch (info->flash_id & FLASH_TYPEMASK) {
 114     case (AMD_ID_DL323B & FLASH_TYPEMASK):
 115         printf("AM29DL323B (32 MBit)\n");
 116         break;
 117     default:
 118         printf ("Unknown Chip Type\n");
 119         break;
 120     }
 121
 122     printf ("  Size: %ld MB in %d Sectors\n",
 123             info->size >> 20, info->sector_count);
 124
 125     printf ("  Sector Start Addresses:");
 126     for (i = 0; i < info->sector_count; ++i) {
 127         if ((i % 5) == 0) printf ("\n   ");
 128         printf (" %08lX%s",
 129                 info->start[i],
 130                 info->protect[i] ? " (RO)" : "     "
 131                 );
 132     }
 133     printf ("\n");
 134     return;
 135 }
 136
 137 /*
 138  * The following code cannot be run from FLASH!
 139  */
 140
 141 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 142 {
 143     short i;
 144     vu_long vendor[2], devid[2];
 145     ulong base = (ulong)addr;
 146
 147     /* Reset and Write auto select command: read Manufacturer ID */
 148     addr[0] = 0xf0f0f0f0;
 149     addr[2 * 0x0555] = 0xAAAAAAAA;
 150     addr[2 * 0x02AA] = 0x55555555;
 151     addr[2 * 0x0555] = 0x90909090;
 152     addr[1] = 0xf0f0f0f0;
 153     addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
 154     addr[2 * 0x02AA + 1] = 0x55555555;
 155     addr[2 * 0x0555 + 1] = 0x90909090;
 156     udelay (1000);
 157
 158     vendor[0] = RD_SWP32(&addr[0]);
 159     vendor[1] = RD_SWP32(&addr[1]);
 160     if (vendor[0] != vendor[1] || vendor[0] != AMD_MANUFACT) {
 161         info->size = 0;
 162         goto out;
 163     }
 164
 165     devid[0] = RD_SWP32(&addr[2]);
 166     devid[1] = RD_SWP32(&addr[3]);
 167
 168     if (devid[0] == AMD_ID_DL323B) {
 169         /*
 170         * we have 2 Banks
 171         * Bank 1 (23 Sectors): 0-7=8kbyte, 8-22=64kbyte
 172         * Bank 2 (48 Sectors): 23-70=64kbyte
 173         */
 174         info->flash_id     = (AMD_MANUFACT & FLASH_VENDMASK) |
 175                              (AMD_ID_DL323B & FLASH_TYPEMASK);
 176         info->sector_count = 71;
 177         info->size         = 4 * (8 * 8 + 63 * 64) * 1024;
 178     }
 179     else {
 180         info->size = 0;
 181         goto out;
 182     }
 183
 184     /* set up sector start address table */
 185     for (i = 0; i < 8; i++) {
 186         info->start[i] = base + (i * 0x8000);
 187     }
 188     for (i = 8; i < info->sector_count; i++) {
 189         info->start[i] = base + (i * 0x40000) + 8 * 0x8000 - 8 * 0x40000;
 190     }
 191
 192     /* check for protected sectors */
 193     for (i = 0; i < info->sector_count; i++) {
 194         /* read sector protection at sector address */
 195         addr = (volatile unsigned long *)(info->start[i]);
 196         addr[2 * 0x0555] = 0xAAAAAAAA;
 197         addr[2 * 0x02AA] = 0x55555555;
 198         addr[2 * 0x0555] = 0x90909090;
 199         addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
 200         addr[2 * 0x02AA + 1] = 0x55555555;
 201         addr[2 * 0x0555 + 1] = 0x90909090;
 202         udelay (1000);
 203         base = RD_SWP32(&addr[4]);
 204         base |= RD_SWP32(&addr[5]);
 205         info->protect[i] = base & 0x00010001 ? 1 : 0;
 206     }
 207     addr = (vu_long*)info->start[0];
 208
 209 out:
 210     /* reset command */
 211     addr[0] = 0xf0f0f0f0;
 212     addr[1] = 0xf0f0f0f0;
 213
 214     return info->size;
 215 }
 216
 217
 218 /*-----------------------------------------------------------------------
 219  */
 220
 221 int flash_erase (flash_info_t *info, int s_first, int s_last)
 222 {
 223     vu_long *addr = (vu_long*)(info->start[0]);
 224     int flag, prot, sect, l_sect;
 225     ulong start, now, last;
 226
 227     if ((s_first < 0) || (s_first > s_last)) {
 228         if (info->flash_id == FLASH_UNKNOWN) {
 229             printf ("- missing\n");
 230         } else {
 231             printf ("- no sectors to erase\n");
 232         }
 233         return 1;
 234     }
 235
 236     prot = 0;
 237     for (sect = s_first; sect <= s_last; sect++) {
 238         if (info->protect[sect]) {
 239             prot++;
 240         }
 241     }
 242
 243     if (prot) {
 244         printf ("- Warning: %d protected sectors will not be erased!\n",
 245                 prot);
 246     } else {
 247         printf ("\n");
 248     }
 249
 250     l_sect = -1;
 251
 252     /* Disable interrupts which might cause a timeout here */
 253     flag = disable_interrupts();
 254
 255     addr[2 * 0x0555] = 0xAAAAAAAA;
 256     addr[2 * 0x02AA] = 0x55555555;
 257     addr[2 * 0x0555] = 0x80808080;
 258     addr[2 * 0x0555] = 0xAAAAAAAA;
 259     addr[2 * 0x02AA] = 0x55555555;
 260     addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
 261     addr[2 * 0x02AA + 1] = 0x55555555;
 262     addr[2 * 0x0555 + 1] = 0x80808080;
 263     addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
 264     addr[2 * 0x02AA + 1] = 0x55555555;
 265     udelay (100);
 266
 267     /* Start erase on unprotected sectors */
 268     for (sect = s_first; sect<=s_last; sect++) {
 269         if (info->protect[sect] == 0) { /* not protected */
 270             addr = (vu_long*)(info->start[sect]);
 271             addr[0] = 0x30303030;
 272             addr[1] = 0x30303030;
 273             l_sect = sect;
 274         }
 275     }
 276
 277     /* re-enable interrupts if necessary */
 278     if (flag)
 279       enable_interrupts();
 280
 281     /* wait at least 80us - let's wait 1 ms */
 282     udelay (1000);
 283
 284     /*
 285      * We wait for the last triggered sector
 286      */
 287     if (l_sect < 0)
 288       goto DONE;
 289
 290     start = get_timer (0);
 291     last  = start;
 292     addr = (vu_long*)(info->start[l_sect]);
 293     while (     (addr[0] & 0x80808080) != 0x80808080 ||
 294                 (addr[1] & 0x80808080) != 0x80808080) {
 295         if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
 296             printf ("Timeout\n");
 297             return 1;
 298         }
 299         /* show that we're waiting */
 300         if ((now - last) > 1000) {      /* every second */
 301             serial_putc ('.');
 302             last = now;
 303         }
 304     }
 305
 306     DONE:
 307     /* reset to read mode */
 308     addr = (volatile unsigned long *)info->start[0];
 309     addr[0] = 0xF0F0F0F0;       /* reset bank */
 310     addr[1] = 0xF0F0F0F0;       /* reset bank */
 311
 312     printf (" done\n");
 313     return 0;
 314 }
 315
 316 /*-----------------------------------------------------------------------
 317  * Copy memory to flash, returns:
 318  * 0 - OK
 319  * 1 - write timeout
 320  * 2 - Flash not erased
 321  */
 322
 323 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 324 {
 325     ulong cp, wp, data;
 326     int i, l, rc;
 327
 328     wp = (addr & ~3);   /* get lower word aligned address */
 329
 330     /*
 331      * handle unaligned start bytes
 332      */
 333     if ((l = addr - wp) != 0) {
 334         data = 0;
 335         for (i=0, cp=wp; i<l; ++i, ++cp) {
 336             data = (data << 8) | (*(uchar *)cp);
 337         }
 338         for (; i<4 && cnt>0; ++i) {
 339             data = (data << 8) | *src++;
 340             --cnt;
 341             ++cp;
 342         }
 343         for (; cnt==0 && i<4; ++i, ++cp) {
 344             data = (data << 8) | (*(uchar *)cp);
 345         }
 346
 347         if ((rc = write_word(info, wp, data)) != 0) {
 348             return (rc);
 349         }
 350         wp += 4;
 351     }
 352
 353     /*
 354      * handle word aligned part
 355      */
 356     while (cnt >= 4) {
 357         data = 0;
 358         for (i=0; i<4; ++i) {
 359             data = (data << 8) | *src++;
 360         }
 361         if ((rc = write_word(info, wp, data)) != 0) {
 362             return (rc);
 363         }
 364         wp  += 4;
 365         cnt -= 4;
 366     }
 367
 368     if (cnt == 0) {
 369         return (0);
 370     }
 371
 372     /*
 373      * handle unaligned tail bytes
 374      */
 375     data = 0;
 376     for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 377         data = (data << 8) | *src++;
 378         --cnt;
 379     }
 380     for (; i<4; ++i, ++cp) {
 381         data = (data << 8) | (*(uchar *)cp);
 382     }
 383
 384     return (write_word(info, wp, data));
 385 }
 386
 387 /*-----------------------------------------------------------------------
 388  * Write a word to Flash, returns:
 389  * 0 - OK
 390  * 1 - write timeout
 391  * 2 - Flash not erased
 392  */
 393 static int write_word (flash_info_t *info, ulong dest, ulong data)
 394 {
 395     vu_long *addr = (vu_long*)(info->start[0]);
 396     ulong start;
 397     int flag;
 398
 399     /* Check if Flash is (sufficiently) erased */
 400     if ((*((vu_long *)dest) & data) != data) {
 401         return (2);
 402     }
 403     /* Disable interrupts which might cause a timeout here */
 404     flag = disable_interrupts();
 405
 406     if ((dest & 0x00000004) == 0) {
 407         addr[2 * 0x0555] = 0xAAAAAAAA;
 408         addr[2 * 0x02AA] = 0x55555555;
 409         addr[2 * 0x0555] = 0xA0A0A0A0;
 410     }
 411     else {
 412         addr[2 * 0x0555 + 1] = 0xAAAAAAAA;
 413         addr[2 * 0x02AA + 1] = 0x55555555;
 414         addr[2 * 0x0555 + 1] = 0xA0A0A0A0;
 415     }
 416
 417     *((vu_long *)dest) = data;
 418
 419     /* re-enable interrupts if necessary */
 420     if (flag)
 421       enable_interrupts();
 422
 423     /* data polling for D7 */
 424     start = get_timer (0);
 425     while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
 426         if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
 427             return (1);
 428         }
 429     }
 430     return (0);
 431 }
 432
 433 /*-----------------------------------------------------------------------
 434  */