board/esd/cpci405/flash.c

   1 /*
   2  * (C) Copyright 2001-2003
   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 calc_size(unsigned long size)
  43 {
  44         switch (size) {
  45         case 1 << 20:
  46                 return 0;
  47         case 2 << 20:
  48                 return 1;
  49         case 4 << 20:
  50                 return 2;
  51         case 8 << 20:
  52                 return 3;
  53         case 16 << 20:
  54                 return 4;
  55         default:
  56                 return 0;
  57         }
  58 }
  59
  60
  61 unsigned long flash_init (void)
  62 {
  63         unsigned long size_b0, size_b1;
  64         int i;
  65         uint pbcr;
  66         unsigned long base_b0, base_b1;
  67
  68         /* Init: no FLASHes known */
  69         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  70                 flash_info[i].flash_id = FLASH_UNKNOWN;
  71         }
  72
  73         /* Static FLASH Bank configuration here - FIXME XXX */
  74
  75         base_b0 = FLASH_BASE0_PRELIM;
  76         size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
  77
  78         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  79                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  80                                 size_b0, size_b0 << 20);
  81         }
  82
  83         base_b1 = FLASH_BASE1_PRELIM;
  84         size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
  85
  86         /* Re-do sizing to get full correct info */
  87
  88         if (size_b1) {
  89                 if (size_b1 < (1 << 20)) {
  90                         /* minimum CS size on PPC405GP is 1MB !!! */
  91                         size_b1 = 1 << 20;
  92                 }
  93                 base_b1 = -size_b1;
  94                 mtdcr (ebccfga, pb0cr);
  95                 pbcr = mfdcr (ebccfgd);
  96                 mtdcr (ebccfga, pb0cr);
  97                 pbcr = (pbcr & 0x0001ffff) | base_b1 | (calc_size(size_b1) << 17);
  98                 mtdcr (ebccfgd, pbcr);
  99 #if 0 /* test-only */
 100                 printf("size_b1=%x base_b1=%x pb1cr = %x\n",
 101                        size_b1, base_b1, pbcr); /* test-only */
 102 #endif
 103         }
 104
 105         if (size_b0) {
 106                 if (size_b0 < (1 << 20)) {
 107                         /* minimum CS size on PPC405GP is 1MB !!! */
 108                         size_b0 = 1 << 20;
 109                 }
 110                 base_b0 = base_b1 - size_b0;
 111                 mtdcr (ebccfga, pb1cr);
 112                 pbcr = mfdcr (ebccfgd);
 113                 mtdcr (ebccfga, pb1cr);
 114                 pbcr = (pbcr & 0x0001ffff) | base_b0 | (calc_size(size_b0) << 17);
 115                 mtdcr (ebccfgd, pbcr);
 116 #if 0 /* test-only */
 117                 printf("size_b0=%x base_b0=%x pb0cr = %x\n",
 118                        size_b0, base_b0, pbcr); /* test-only */
 119 #endif
 120         }
 121
 122         size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
 123
 124         flash_get_offsets (base_b0, &flash_info[0]);
 125
 126         /* monitor protection ON by default */
 127         flash_protect (FLAG_PROTECT_SET,
 128                         base_b0 + size_b0 - monitor_flash_len,
 129                         base_b0 + size_b0 - 1, &flash_info[0]);
 130
 131         if (size_b1) {
 132                 /* Re-do sizing to get full correct info */
 133                 size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
 134
 135                 flash_get_offsets (base_b1, &flash_info[1]);
 136
 137                 /* monitor protection ON by default */
 138                 flash_protect (FLAG_PROTECT_SET,
 139                                 base_b1 + size_b1 - monitor_flash_len,
 140                                 base_b1 + size_b1 - 1, &flash_info[1]);
 141                 /* monitor protection OFF by default (one is enough) */
 142                 flash_protect (FLAG_PROTECT_CLEAR,
 143                                 base_b0 + size_b0 - monitor_flash_len,
 144                                 base_b0 + size_b0 - 1, &flash_info[0]);
 145         } else {
 146                 flash_info[1].flash_id = FLASH_UNKNOWN;
 147                 flash_info[1].sector_count = -1;
 148         }
 149
 150         flash_info[0].size = size_b0;
 151         flash_info[1].size = size_b1;
 152
 153         return (size_b0 + size_b1);
 154 }