board/prodrive/pdnb3/flash.c

   1 /*
   2  * (C) Copyright 2006
   3  * Stefan Roese, DENX Software Engineering, sr@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 <asm/arch/ixp425.h>
  26
  27 /*
  28  * include common flash code (for esd boards)
  29  */
  30 #include "../common/flash.c"
  31
  32 /*
  33  * Prototypes
  34  */
  35 static ulong flash_get_size (vu_long * addr, flash_info_t * info);
  36
  37 static inline ulong ld(ulong x)
  38 {
  39         ulong k = 0;
  40
  41         while (x >>= 1)
  42                 ++k;
  43
  44         return k;
  45 }
  46
  47 unsigned long flash_init(void)
  48 {
  49         unsigned long size;
  50         int i;
  51
  52         /* Init: no FLASHes known */
  53         for (i=0; i<CFG_MAX_FLASH_BANKS; i++)
  54                 flash_info[i].flash_id = FLASH_UNKNOWN;
  55
  56         size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  57
  58         if (flash_info[0].flash_id == FLASH_UNKNOWN)
  59                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  60                         size, size<<20);
  61
  62         /* Reconfigure CS0 to actual FLASH size */
  63         *IXP425_EXP_CS0 = (*IXP425_EXP_CS0 & ~0x00003C00) | ((ld(size) - 9) << 10);
  64
  65         /* Monitor protection ON by default */
  66         flash_protect(FLAG_PROTECT_SET,
  67                       CFG_MONITOR_BASE, CFG_MONITOR_BASE + monitor_flash_len - 1,
  68                       &flash_info[CFG_MAX_FLASH_BANKS - 1]);
  69
  70         /* Environment protection ON by default */
  71         flash_protect(FLAG_PROTECT_SET,
  72                       CFG_ENV_ADDR,
  73                       CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
  74                       &flash_info[CFG_MAX_FLASH_BANKS - 1]);
  75
  76         /* Redundant environment protection ON by default */
  77         flash_protect(FLAG_PROTECT_SET,
  78                       CFG_ENV_ADDR_REDUND,
  79                       CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
  80                       &flash_info[CFG_MAX_FLASH_BANKS - 1]);
  81
  82         flash_info[0].size = size;
  83
  84         return size;
  85 }