board/esd/ar405/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         uint pbcr;
  47         unsigned long base_b0, base_b1;
  48
  49         /* Init: no FLASHes known */
  50         for (i=0; i<CFG_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           {
  71             mtdcr(ebccfga, pb0cr);
  72             pbcr = mfdcr(ebccfgd);
  73             mtdcr(ebccfga, pb0cr);
  74             base_b1 = -size_b1;
  75             pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
  76             mtdcr(ebccfgd, pbcr);
  77             /*          printf("pb1cr = %x\n", pbcr); */
  78           }
  79
  80         if (size_b0)
  81           {
  82             mtdcr(ebccfga, pb1cr);
  83             pbcr = mfdcr(ebccfgd);
  84             mtdcr(ebccfga, pb1cr);
  85             base_b0 = base_b1 - size_b0;
  86             pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
  87             mtdcr(ebccfgd, 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         (void)flash_protect(FLAG_PROTECT_SET,
  97                             base_b0+size_b0-monitor_flash_len,
  98                             base_b0+size_b0-1,
  99                             &flash_info[0]);
 100
 101         if (size_b1) {
 102                 /* Re-do sizing to get full correct info */
 103                 size_b1 = flash_get_size((vu_long *)base_b1, &flash_info[1]);
 104
 105                 flash_get_offsets (base_b1, &flash_info[1]);
 106
 107                 /* monitor protection ON by default */
 108                 (void)flash_protect(FLAG_PROTECT_SET,
 109                                     base_b1+size_b1-monitor_flash_len,
 110                                     base_b1+size_b1-1,
 111                                     &flash_info[1]);
 112                 /* monitor protection OFF by default (one is enough) */
 113                 (void)flash_protect(FLAG_PROTECT_CLEAR,
 114                                     base_b0+size_b0-monitor_flash_len,
 115                                     base_b0+size_b0-1,
 116                                     &flash_info[0]);
 117         } else {
 118                 flash_info[1].flash_id = FLASH_UNKNOWN;
 119                 flash_info[1].sector_count = -1;
 120         }
 121
 122         flash_info[0].size = size_b0;
 123         flash_info[1].size = size_b1;
 124
 125         return (size_b0 + size_b1);
 126 }