board/esd/plu405/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;
  45         int i;
  46         uint pbcr;
  47         unsigned long base_b0;
  48         int size_val = 0;
  49
  50         /* Init: no FLASHes known */
  51         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  52                 flash_info[i].flash_id = FLASH_UNKNOWN;
  53         }
  54
  55         /* Static FLASH Bank configuration here - FIXME XXX */
  56
  57         size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &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         /* Setup offsets */
  65         flash_get_offsets (-size_b0, &flash_info[0]);
  66
  67         /* Re-do sizing to get full correct info */
  68         mtdcr(ebccfga, pb0cr);
  69         pbcr = mfdcr(ebccfgd);
  70         mtdcr(ebccfga, pb0cr);
  71         base_b0 = -size_b0;
  72         switch (size_b0) {
  73         case 1 << 20:
  74                 size_val = 0;
  75                 break;
  76         case 2 << 20:
  77                 size_val = 1;
  78                 break;
  79         case 4 << 20:
  80                 size_val = 2;
  81                 break;
  82         case 8 << 20:
  83                 size_val = 3;
  84                 break;
  85         case 16 << 20:
  86                 size_val = 4;
  87                 break;
  88         }
  89         pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
  90         mtdcr(ebccfgd, pbcr);
  91
  92         /* Monitor protection ON by default */
  93         (void)flash_protect(FLAG_PROTECT_SET,
  94                             -CONFIG_SYS_MONITOR_LEN,
  95                             0xffffffff,
  96                             &flash_info[0]);
  97
  98         flash_info[0].size = size_b0;
  99
 100         return (size_b0);
 101 }