common/flash.c

   1 /*
   2  * (C) Copyright 2000
   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 /* #define DEBUG */
  25
  26 #include <common.h>
  27 #include <flash.h>
  28
  29 #if !defined(CONFIG_SYS_NO_FLASH)
  30 #include <mtd/cfi_flash.h>
  31
  32 extern flash_info_t  flash_info[]; /* info for FLASH chips */
  33
  34 /*-----------------------------------------------------------------------
  35  * Functions
  36  */
  37
  38 /*-----------------------------------------------------------------------
  39  * Set protection status for monitor sectors
  40  *
  41  * The monitor is always located in the _first_ Flash bank.
  42  * If necessary you have to map the second bank at lower addresses.
  43  */
  44 void
  45 flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
  46 {
  47         ulong b_end;
  48         short s_end;
  49         int i;
  50
  51         /* Do nothing if input data is bad. */
  52         if (!info || info->sector_count == 0 || info->size == 0 || to < from) {
  53                 return;
  54         }
  55
  56         s_end = info->sector_count - 1; /* index of last sector */
  57         b_end = info->start[0] + info->size - 1;        /* bank end address */
  58
  59         debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n",
  60                 (flag & FLAG_PROTECT_SET) ? "ON" :
  61                         (flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???",
  62                 from, to);
  63
  64         /* There is nothing to do if we have no data about the flash
  65          * or the protect range and flash range don't overlap.
  66          */
  67         if (info->flash_id == FLASH_UNKNOWN ||
  68             to < info->start[0] || from > b_end) {
  69                 return;
  70         }
  71
  72         for (i=0; i<info->sector_count; ++i) {
  73                 ulong end;              /* last address in current sect */
  74
  75                 end = (i == s_end) ? b_end : info->start[i + 1] - 1;
  76
  77                 /* Update protection if any part of the sector
  78                  * is in the specified range.
  79                  */
  80                 if (from <= end && to >= info->start[i]) {
  81                         if (flag & FLAG_PROTECT_CLEAR) {
  82 #if defined(CONFIG_SYS_FLASH_PROTECTION)
  83                                 flash_real_protect(info, i, 0);
  84 #else
  85                                 info->protect[i] = 0;
  86 #endif  /* CONFIG_SYS_FLASH_PROTECTION */
  87                                 debug ("protect off %d\n", i);
  88                         }
  89                         else if (flag & FLAG_PROTECT_SET) {
  90 #if defined(CONFIG_SYS_FLASH_PROTECTION)
  91                                 flash_real_protect(info, i, 1);
  92 #else
  93                                 info->protect[i] = 1;
  94 #endif  /* CONFIG_SYS_FLASH_PROTECTION */
  95                                 debug ("protect on %d\n", i);
  96                         }
  97                 }
  98         }
  99 }
 100
 101 /*-----------------------------------------------------------------------
 102  */
 103
 104 flash_info_t *
 105 addr2info (ulong addr)
 106 {
 107 #ifndef CONFIG_SPD823TS
 108         flash_info_t *info;
 109         int i;
 110
 111         for (i=0, info = &flash_info[0]; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i, ++info) {
 112                 if (info->flash_id != FLASH_UNKNOWN &&
 113                     addr >= info->start[0] &&
 114                     /* WARNING - The '- 1' is needed if the flash
 115                      * is at the end of the address space, since
 116                      * info->start[0] + info->size wraps back to 0.
 117                      * Please don't change this unless you understand this.
 118                      */
 119                     addr <= info->start[0] + info->size - 1) {
 120                         return (info);
 121                 }
 122         }
 123 #endif /* CONFIG_SPD823TS */
 124
 125         return (NULL);
 126 }
 127
 128 /*-----------------------------------------------------------------------
 129  * Copy memory to flash.
 130  * Make sure all target addresses are within Flash bounds,
 131  * and no protected sectors are hit.
 132  * Returns:
 133  * ERR_OK          0 - OK
 134  * ERR_TIMOUT      1 - write timeout
 135  * ERR_NOT_ERASED  2 - Flash not erased
 136  * ERR_PROTECTED   4 - target range includes protected sectors
 137  * ERR_INVAL       8 - target address not in Flash memory
 138  * ERR_ALIGN       16 - target address not aligned on boundary
 139  *                      (only some targets require alignment)
 140  */
 141 int
 142 flash_write (char *src, ulong addr, ulong cnt)
 143 {
 144 #ifdef CONFIG_SPD823TS
 145         return (ERR_TIMOUT);    /* any other error codes are possible as well */
 146 #else
 147         int i;
 148         ulong         end        = addr + cnt - 1;
 149         flash_info_t *info_first = addr2info (addr);
 150         flash_info_t *info_last  = addr2info (end );
 151         flash_info_t *info;
 152
 153         if (cnt == 0) {
 154                 return (ERR_OK);
 155         }
 156
 157         if (!info_first || !info_last) {
 158                 return (ERR_INVAL);
 159         }
 160
 161         for (info = info_first; info <= info_last; ++info) {
 162                 ulong b_end = info->start[0] + info->size;      /* bank end addr */
 163                 short s_end = info->sector_count - 1;
 164                 for (i=0; i<info->sector_count; ++i) {
 165                         ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
 166
 167                         if ((end >= info->start[i]) && (addr < e_addr) &&
 168                             (info->protect[i] != 0) ) {
 169                                 return (ERR_PROTECTED);
 170                         }
 171                 }
 172         }
 173
 174         /* finally write data to flash */
 175         for (info = info_first; info <= info_last && cnt>0; ++info) {
 176                 ulong len;
 177
 178                 len = info->start[0] + info->size - addr;
 179                 if (len > cnt)
 180                         len = cnt;
 181                 if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) {
 182                         return (i);
 183                 }
 184                 cnt  -= len;
 185                 addr += len;
 186                 src  += len;
 187         }
 188         return (ERR_OK);
 189 #endif /* CONFIG_SPD823TS */
 190 }
 191
 192 /*-----------------------------------------------------------------------
 193  */
 194
 195 void flash_perror (int err)
 196 {
 197         switch (err) {
 198         case ERR_OK:
 199                 break;
 200         case ERR_TIMOUT:
 201                 puts ("Timeout writing to Flash\n");
 202                 break;
 203         case ERR_NOT_ERASED:
 204                 puts ("Flash not Erased\n");
 205                 break;
 206         case ERR_PROTECTED:
 207                 puts ("Can't write to protected Flash sectors\n");
 208                 break;
 209         case ERR_INVAL:
 210                 puts ("Outside available Flash\n");
 211                 break;
 212         case ERR_ALIGN:
 213                 puts ("Start and/or end address not on sector boundary\n");
 214                 break;
 215         case ERR_UNKNOWN_FLASH_VENDOR:
 216                 puts ("Unknown Vendor of Flash\n");
 217                 break;
 218         case ERR_UNKNOWN_FLASH_TYPE:
 219                 puts ("Unknown Type of Flash\n");
 220                 break;
 221         case ERR_PROG_ERROR:
 222                 puts ("General Flash Programming Error\n");
 223                 break;
 224         case ERR_ABORTED:
 225                 puts("Flash Programming Aborted\n");
 226                 break;
 227         default:
 228                 printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
 229                 break;
 230         }
 231 }
 232
 233 /*-----------------------------------------------------------------------
 234  */
 235 #endif /* !CONFIG_SYS_NO_FLASH */