board/impa7/flash.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <common.h>
  26
  27 #define FLASH_BANK_SIZE 0x800000
  28 #define MAIN_SECT_SIZE  0x20000
  29 #define PARAM_SECT_SIZE 0x4000
  30
  31 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
  32
  33
  34 /*-----------------------------------------------------------------------
  35  */
  36
  37 ulong flash_init(void)
  38 {
  39     int i, j;
  40     ulong size = 0;
  41
  42     for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
  43     {
  44         ulong flashbase = 0;
  45         flash_info[i].flash_id =
  46           (INTEL_MANUFACT & FLASH_VENDMASK) |
  47           (INTEL_ID_28F320B3T & FLASH_TYPEMASK);
  48         flash_info[i].size = FLASH_BANK_SIZE;
  49         flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
  50         memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
  51         if (i == 0)
  52           flashbase = PHYS_FLASH_1;
  53         else if (i == 1)
  54           flashbase = PHYS_FLASH_2;
  55         else
  56           panic("configured to many flash banks!\n");
  57         for (j = 0; j < flash_info[i].sector_count; j++)
  58         {
  59             if (j <= 7)
  60             {
  61                 flash_info[i].start[j] = flashbase + j * PARAM_SECT_SIZE;
  62             }
  63             else
  64             {
  65                 flash_info[i].start[j] = flashbase + (j - 7)*MAIN_SECT_SIZE;
  66             }
  67         }
  68         size += flash_info[i].size;
  69     }
  70
  71     /* Protect monitor and environment sectors
  72      */
  73     flash_protect(FLAG_PROTECT_SET,
  74                   CFG_FLASH_BASE,
  75                   CFG_FLASH_BASE + monitor_flash_len - 1,
  76                   &flash_info[0]);
  77
  78     flash_protect(FLAG_PROTECT_SET,
  79                   CFG_ENV_ADDR,
  80                   CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
  81                   &flash_info[0]);
  82
  83     return size;
  84 }
  85
  86 /*-----------------------------------------------------------------------
  87  */
  88 void flash_print_info  (flash_info_t *info)
  89 {
  90     int i;
  91
  92     switch (info->flash_id & FLASH_VENDMASK)
  93     {
  94     case (INTEL_MANUFACT & FLASH_VENDMASK):
  95         printf("Intel: ");
  96         break;
  97     default:
  98         printf("Unknown Vendor ");
  99         break;
 100     }
 101
 102     switch (info->flash_id & FLASH_TYPEMASK)
 103     {
 104     case (INTEL_ID_28F320B3T & FLASH_TYPEMASK):
 105         printf("28F320F3B (16Mbit)\n");
 106         break;
 107     default:
 108         printf("Unknown Chip Type\n");
 109         goto Done;
 110         break;
 111     }
 112
 113     printf("  Size: %ld MB in %d Sectors\n",
 114            info->size >> 20, info->sector_count);
 115
 116     printf("  Sector Start Addresses:");
 117     for (i = 0; i < info->sector_count; i++)
 118     {
 119         if ((i % 5) == 0)
 120         {
 121             printf ("\n   ");
 122         }
 123         printf (" %08lX%s", info->start[i],
 124                 info->protect[i] ? " (RO)" : "     ");
 125     }
 126     printf ("\n");
 127
 128 Done:
 129 }
 130
 131 /*-----------------------------------------------------------------------
 132  */
 133
 134 int     flash_erase (flash_info_t *info, int s_first, int s_last)
 135 {
 136     int flag, prot, sect;
 137     int rc = ERR_OK;
 138
 139     if (info->flash_id == FLASH_UNKNOWN)
 140         return ERR_UNKNOWN_FLASH_TYPE;
 141
 142     if ((s_first < 0) || (s_first > s_last)) {
 143         return ERR_INVAL;
 144     }
 145
 146     if ((info->flash_id & FLASH_VENDMASK) !=
 147         (INTEL_MANUFACT & FLASH_VENDMASK)) {
 148         return ERR_UNKNOWN_FLASH_VENDOR;
 149     }
 150
 151     prot = 0;
 152     for (sect=s_first; sect<=s_last; ++sect) {
 153         if (info->protect[sect]) {
 154             prot++;
 155         }
 156     }
 157     if (prot)
 158         return ERR_PROTECTED;
 159
 160     /*
 161      * Disable interrupts which might cause a timeout
 162      * here. Remember that our exception vectors are
 163      * at address 0 in the flash, and we don't want a
 164      * (ticker) exception to happen while the flash
 165      * chip is in programming mode.
 166      */
 167     flag = disable_interrupts();
 168
 169     /* Start erase on unprotected sectors */
 170     for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
 171
 172         printf("Erasing sector %2d ... ", sect);
 173
 174         /* arm simple, non interrupt dependent timer */
 175         reset_timer_masked();
 176
 177         if (info->protect[sect] == 0) { /* not protected */
 178             vu_long *addr = (vu_long *)(info->start[sect]);
 179
 180             *addr = 0x00200020; /* erase setup */
 181             *addr = 0x00D000D0; /* erase confirm */
 182
 183             while ((*addr & 0x00800080) != 0x00800080) {
 184                 if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
 185                     *addr = 0x00B000B0; /* suspend erase */
 186                     *addr = 0x00FF00FF; /* reset to read mode */
 187                     rc = ERR_TIMOUT;
 188                     goto outahere;
 189                 }
 190             }
 191
 192             *addr = 0x00FF00FF; /* reset to read mode */
 193         }
 194         printf("ok.\n");
 195     }
 196     if (ctrlc())
 197       printf("User Interrupt!\n");
 198
 199 outahere:
 200
 201     /* allow flash to settle - wait 10 ms */
 202     udelay_masked(10000);
 203
 204     if (flag)
 205       enable_interrupts();
 206
 207     return rc;
 208 }
 209
 210 /*-----------------------------------------------------------------------
 211  * Copy memory to flash
 212  */
 213
 214 static int write_word (flash_info_t *info, ulong dest, ulong data)
 215 {
 216     vu_long *addr = (vu_long *)dest;
 217     ulong barf;
 218     int rc = ERR_OK;
 219     int flag;
 220
 221     /* Check if Flash is (sufficiently) erased
 222      */
 223     if ((*addr & data) != data)
 224         return ERR_NOT_ERASED;
 225
 226     /*
 227      * Disable interrupts which might cause a timeout
 228      * here. Remember that our exception vectors are
 229      * at address 0 in the flash, and we don't want a
 230      * (ticker) exception to happen while the flash
 231      * chip is in programming mode.
 232      */
 233     flag = disable_interrupts();
 234
 235     /* clear status register command */
 236     *addr = 0x00500050;
 237
 238     /* program set-up command */
 239     *addr = 0x00400040;
 240
 241     /* latch address/data */
 242     *addr = data;
 243
 244     /* arm simple, non interrupt dependent timer */
 245     reset_timer_masked();
 246
 247     /* read status register command */
 248     *addr = 0x00700070;
 249
 250     /* wait while polling the status register */
 251     while((*addr & 0x00800080) != 0x00800080)
 252     {
 253         if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
 254             rc = ERR_TIMOUT;
 255             /* suspend program command */
 256             *addr = 0x00B000B0;
 257             goto outahere;
 258         }
 259
 260         if( *addr & 0x003A003A) {       /* check for error */
 261             barf = *addr;
 262             if( barf & 0x003A0000) {
 263                 barf >>=16;
 264             } else {
 265                 barf &= 0x0000003A;
 266             }
 267             printf("\nFlash write error %02lx at address %08lx\n",
 268                    barf, (unsigned long)dest);
 269             if(barf & 0x0002) {
 270                 printf("Block locked, not erased.\n");
 271                 rc = ERR_NOT_ERASED;
 272                 goto outahere;
 273             }
 274             if(barf & 0x0010) {
 275                 printf("Programming error.\n");
 276                 rc = ERR_PROG_ERROR;
 277                 goto outahere;
 278             }
 279             if(barf & 0x0008) {
 280                 printf("Vpp Low error.\n");
 281                 rc = ERR_PROG_ERROR;
 282                 goto outahere;
 283             }
 284             rc = ERR_PROG_ERROR;
 285             goto outahere;
 286         }
 287     }
 288
 289
 290 outahere:
 291     /* read array command */
 292     *addr = 0x00FF00FF;
 293
 294     if (flag)
 295       enable_interrupts();
 296
 297     return rc;
 298 }
 299
 300 /*-----------------------------------------------------------------------
 301  * Copy memory to flash.
 302  */
 303
 304 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 305 {
 306     ulong cp, wp, data;
 307     int l;
 308     int i, rc;
 309
 310     wp = (addr & ~3);   /* get lower word aligned address */
 311
 312     /*
 313      * handle unaligned start bytes
 314      */
 315     if ((l = addr - wp) != 0) {
 316         data = 0;
 317         for (i=0, cp=wp; i<l; ++i, ++cp) {
 318             data = (data >> 8) | (*(uchar *)cp << 24);
 319         }
 320         for (; i<4 && cnt>0; ++i) {
 321             data = (data >> 8) | (*src++ << 24);
 322             --cnt;
 323             ++cp;
 324         }
 325         for (; cnt==0 && i<4; ++i, ++cp) {
 326             data = (data >> 8) | (*(uchar *)cp << 24);
 327         }
 328
 329         if ((rc = write_word(info, wp, data)) != 0) {
 330             return (rc);
 331         }
 332         wp += 4;
 333     }
 334
 335     /*
 336      * handle word aligned part
 337      */
 338     while (cnt >= 4) {
 339         data = *((vu_long*)src);
 340         if ((rc = write_word(info, wp, data)) != 0) {
 341             return (rc);
 342         }
 343         src += 4;
 344         wp  += 4;
 345         cnt -= 4;
 346     }
 347
 348     if (cnt == 0) {
 349         return ERR_OK;
 350     }
 351
 352     /*
 353      * handle unaligned tail bytes
 354      */
 355     data = 0;
 356     for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 357         data = (data >> 8) | (*src++ << 24);
 358         --cnt;
 359     }
 360     for (; i<4; ++i, ++cp) {
 361         data = (data >> 8) | (*(uchar *)cp << 24);
 362     }
 363
 364     return write_word(info, wp, data);
 365 }