board/esd/adciop/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  */
  36 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
  37 static void flash_get_offsets (ulong base, flash_info_t *info);
  38
  39 /*-----------------------------------------------------------------------
  40  */
  41
  42 unsigned long flash_init (void)
  43 {
  44         unsigned long size_b0, size_b1;
  45         int i;
  46
  47         /* Init: no FLASHes known */
  48         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  49                 flash_info[i].flash_id = FLASH_UNKNOWN;
  50         }
  51
  52         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  53
  54         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  55                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  56                         size_b0, size_b0<<20);
  57         }
  58
  59         size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
  60
  61         if (size_b1 > size_b0) {
  62                 printf ("## ERROR: "
  63                         "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
  64                         size_b1, size_b1<<20,
  65                         size_b0, size_b0<<20
  66                 );
  67                 flash_info[0].flash_id  = FLASH_UNKNOWN;
  68                 flash_info[1].flash_id  = FLASH_UNKNOWN;
  69                 flash_info[0].sector_count      = -1;
  70                 flash_info[1].sector_count      = -1;
  71                 flash_info[0].size              = 0;
  72                 flash_info[1].size              = 0;
  73                 return (0);
  74         }
  75
  76         /* Re-do sizing to get full correct info */
  77         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  78
  79         flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
  80
  81         /* monitor protection ON by default */
  82         flash_protect(FLAG_PROTECT_SET,
  83                       FLASH_BASE0_PRELIM+size_b0-monitor_flash_len,
  84                       FLASH_BASE0_PRELIM+size_b0-1,
  85                       &flash_info[0]);
  86
  87         if (size_b1) {
  88                 /* Re-do sizing to get full correct info */
  89                 size_b1 = flash_get_size((vu_long *)(FLASH_BASE0_PRELIM + size_b0),
  90                                           &flash_info[1]);
  91
  92                 flash_get_offsets (FLASH_BASE0_PRELIM + size_b0, &flash_info[1]);
  93
  94                 /* monitor protection ON by default */
  95                 flash_protect(FLAG_PROTECT_SET,
  96                               FLASH_BASE0_PRELIM+size_b0+size_b1-monitor_flash_len,
  97                               FLASH_BASE0_PRELIM+size_b0+size_b1-1,
  98                               &flash_info[1]);
  99                 /* monitor protection OFF by default (one is enough) */
 100                 flash_protect(FLAG_PROTECT_CLEAR,
 101                               FLASH_BASE0_PRELIM+size_b0-monitor_flash_len,
 102                               FLASH_BASE0_PRELIM+size_b0-1,
 103                               &flash_info[0]);
 104         } else {
 105                 flash_info[1].flash_id = FLASH_UNKNOWN;
 106                 flash_info[1].sector_count = -1;
 107         }
 108
 109         flash_info[0].size = size_b0;
 110         flash_info[1].size = size_b1;
 111
 112         return (size_b0 + size_b1);
 113 }