board/esd/ocrtc/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         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         base_b0 = FLASH_BASE0_PRELIM;
  58         size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
  59
  60         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  61                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  62                         size_b0, size_b0 << 20);
  63         }
  64
  65         base_b1 = FLASH_BASE1_PRELIM;
  66         size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
  67
  68         /* Re-do sizing to get full correct info */
  69
  70         if (size_b1) {
  71                 mtdcr (ebccfga, pb0cr);
  72                 pbcr = mfdcr (ebccfgd);
  73                 mtdcr (ebccfga, pb0cr);
  74                 base_b1 = -size_b1;
  75                 switch (size_b1) {
  76                 case 1 << 20:
  77                         size_val = 0;
  78                         break;
  79                 case 2 << 20:
  80                         size_val = 1;
  81                         break;
  82                 case 4 << 20:
  83                         size_val = 2;
  84                         break;
  85                 case 8 << 20:
  86                         size_val = 3;
  87                         break;
  88                 case 16 << 20:
  89                         size_val = 4;
  90                         break;
  91                 }
  92                 pbcr = (pbcr & 0x0001ffff) | base_b1 | (size_val << 17);
  93                 mtdcr (ebccfgd, pbcr);
  94                 /*          printf("pb1cr = %x\n", pbcr); */
  95         }
  96
  97         if (size_b0) {
  98                 mtdcr (ebccfga, pb1cr);
  99                 pbcr = mfdcr (ebccfgd);
 100                 mtdcr (ebccfga, pb1cr);
 101                 base_b0 = base_b1 - size_b0;
 102                 switch (size_b1) {
 103                 case 1 << 20:
 104                         size_val = 0;
 105                         break;
 106                 case 2 << 20:
 107                         size_val = 1;
 108                         break;
 109                 case 4 << 20:
 110                         size_val = 2;
 111                         break;
 112                 case 8 << 20:
 113                         size_val = 3;
 114                         break;
 115                 case 16 << 20:
 116                         size_val = 4;
 117                         break;
 118                 }
 119                 pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
 120                 mtdcr (ebccfgd, pbcr);
 121                 /*            printf("pb0cr = %x\n", pbcr); */
 122         }
 123
 124         size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]);
 125
 126         flash_get_offsets (base_b0, &flash_info[0]);
 127
 128         /* monitor protection ON by default */
 129         flash_protect (FLAG_PROTECT_SET,
 130                         base_b0 + size_b0 - monitor_flash_len,
 131                         base_b0 + size_b0 - 1, &flash_info[0]);
 132
 133         if (size_b1) {
 134                 /* Re-do sizing to get full correct info */
 135                 size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]);
 136
 137                 flash_get_offsets (base_b1, &flash_info[1]);
 138
 139                 /* monitor protection ON by default */
 140                 flash_protect (FLAG_PROTECT_SET,
 141                                 base_b1 + size_b1 - monitor_flash_len,
 142                                 base_b1 + size_b1 - 1, &flash_info[1]);
 143                 /* monitor protection OFF by default (one is enough) */
 144                 flash_protect (FLAG_PROTECT_CLEAR,
 145                                 base_b0 + size_b0 - monitor_flash_len,
 146                                 base_b0 + size_b0 - 1, &flash_info[0]);
 147         } else {
 148                 flash_info[1].flash_id = FLASH_UNKNOWN;
 149                 flash_info[1].sector_count = -1;
 150         }
 151
 152         flash_info[0].size = size_b0;
 153         flash_info[1].size = size_b1;
 154
 155         return (size_b0 + size_b1);
 156 }