LXR uboot/board/esd/du405/flash.c

   1/*
   2 * (C) Copyright 2001
   3 * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
   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 <ppc4xx.h>
  26#include <asm/processor.h>
  27
  28/*
  29 * include common flash code (for esd boards)
  30 */
  31#include "../common/flash.c"
  32
  33/*-----------------------------------------------------------------------
  34 * Functions
  35 */
  36static ulong flash_get_size (vu_long * addr, flash_info_t * info);
  37static void flash_get_offsets (ulong base, flash_info_t * info);
  38
  39/*-----------------------------------------------------------------------
  40 */
  41
  42unsigned long flash_init (void)
  43{
  44        unsigned long size_b0, size_b1;
  45        int i;
  46        uint pbcr;
  47        unsigned long base_b0, base_b1;
  48
  49        /* Init: no FLASHes known */
  50        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  51                flash_info[i].flash_id = FLASH_UNKNOWN;
  52        }
  53
  54        /* Static FLASH Bank configuration here - FIXME XXX */
  55
  56        base_b0 = FLASH_BASE0_PRELIM;
  57        size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
  58
  59        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  60                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  61                        size_b0, size_b0 << 20);
  62        }
  63
  64        base_b1 = FLASH_BASE1_PRELIM;
  65        size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
  66
  67        /* Re-do sizing to get full correct info */
  68
  69        if (size_b1) {
  70                mtdcr (EBC0_CFGADDR, PB0CR);
  71                pbcr = mfdcr (EBC0_CFGDATA);
  72                mtdcr (EBC0_CFGADDR, PB0CR);
  73                base_b1 = -size_b1;
  74                pbcr = (pbcr & 0x0001ffff) | base_b1 |
  75                                (((size_b1 / 1024 / 1024) - 1) << 17);
  76                mtdcr (EBC0_CFGDATA, pbcr);
  77                /*          printf("PB1CR = %x\n", pbcr); */
  78        }
  79
  80        if (size_b0) {
  81                mtdcr (EBC0_CFGADDR, PB1CR);
  82                pbcr = mfdcr (EBC0_CFGDATA);
  83                mtdcr (EBC0_CFGADDR, PB1CR);
  84                base_b0 = base_b1 - size_b0;
  85                pbcr = (pbcr & 0x0001ffff) | base_b0 |
  86                                (((size_b0 / 1024 / 1024) - 1) << 17);
  87                mtdcr (EBC0_CFGDATA, pbcr);
  88                /*            printf("PB0CR = %x\n", pbcr); */
  89        }
  90
  91        size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
  92
  93        flash_get_offsets (base_b0, &flash_info[0]);
  94
  95        /* monitor protection ON by default */
  96        flash_protect (FLAG_PROTECT_SET,
  97                        base_b0 + size_b0 - monitor_flash_len,
  98                        base_b0 + size_b0 - 1, &flash_info[0]);
  99
 100        if (size_b1) {
 101                /* Re-do sizing to get full correct info */
 102                size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
 103
 104                flash_get_offsets (base_b1, &flash_info[1]);
 105
 106                /* monitor protection ON by default */
 107                flash_protect (FLAG_PROTECT_SET,
 108                                base_b1 + size_b1 - monitor_flash_len,
 109                                base_b1 + size_b1 - 1, &flash_info[1]);
 110                /* monitor protection OFF by default (one is enough) */
 111                flash_protect (FLAG_PROTECT_CLEAR,
 112                                base_b0 + size_b0 - monitor_flash_len,
 113                                base_b0 + size_b0 - 1, &flash_info[0]);
 114        } else {
 115                flash_info[1].flash_id = FLASH_UNKNOWN;
 116                flash_info[1].sector_count = -1;
 117        }
 118
 119        flash_info[0].size = size_b0;
 120        flash_info[1].size = size_b1;
 121
 122        return (size_b0 + size_b1);
 123}
 124