LXR uboot/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#if !defined(CONFIG_FLASH_CFI_DRIVER)
  28
  29/*
  30 * include common flash code (for esd boards)
  31 */
  32#include "../common/flash.c"
  33
  34/*
  35 * Prototypes
  36 */
  37static ulong flash_get_size (vu_long * addr, flash_info_t * info);
  38
  39static inline ulong ld(ulong x)
  40{
  41        ulong k = 0;
  42
  43        while (x >>= 1)
  44                ++k;
  45
  46        return k;
  47}
  48
  49unsigned long flash_init(void)
  50{
  51        unsigned long size;
  52        int i;
  53
  54        /* Init: no FLASHes known */
  55        for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; i++)
  56                flash_info[i].flash_id = FLASH_UNKNOWN;
  57
  58        size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  59
  60        if (flash_info[0].flash_id == FLASH_UNKNOWN)
  61                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  62                        size, size<<20);
  63
  64        /* Reconfigure CS0 to actual FLASH size */
  65        *IXP425_EXP_CS0 = (*IXP425_EXP_CS0 & ~0x00003C00) | ((ld(size) - 9) << 10);
  66
  67        /* Monitor protection ON by default */
  68        flash_protect(FLAG_PROTECT_SET,
  69                      CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
  70                      &flash_info[CONFIG_SYS_MAX_FLASH_BANKS - 1]);
  71
  72        /* Environment protection ON by default */
  73        flash_protect(FLAG_PROTECT_SET,
  74                      CONFIG_ENV_ADDR,
  75                      CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
  76                      &flash_info[CONFIG_SYS_MAX_FLASH_BANKS - 1]);
  77
  78        /* Redundant environment protection ON by default */
  79        flash_protect(FLAG_PROTECT_SET,
  80                      CONFIG_ENV_ADDR_REDUND,
  81                      CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
  82                      &flash_info[CONFIG_SYS_MAX_FLASH_BANKS - 1]);
  83
  84        flash_info[0].size = size;
  85
  86        return size;
  87}
  88
  89#endif /* CONFIG_FLASH_CFI_DRIVER */
  90