LXR uboot/board/dave/PPChameleonEVB/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 <asm/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 */
  36static ulong flash_get_size (vu_long * addr, flash_info_t * info);
  37static void flash_get_offsets (ulong base, flash_info_t * info);
  38
  39/*-----------------------------------------------------------------------
  40 */
  41
  42unsigned long flash_init (void)
  43{
  44#ifdef __DEBUG_START_FROM_SRAM__
  45        return CONFIG_SYS_DUMMY_FLASH_SIZE;
  46#else
  47        unsigned long size;
  48        int i;
  49        uint pbcr;
  50        unsigned long base;
  51        int size_val = 0;
  52
  53        debug("[%s, %d] Entering ...\n", __FUNCTION__, __LINE__);
  54        debug("[%s, %d] flash_info = 0x%p ...\n", __func__, __LINE__,
  55                                                flash_info);
  56
  57        /* Init: no FLASHes known */
  58        for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  59                flash_info[i].flash_id = FLASH_UNKNOWN;
  60        }
  61
  62        /* Static FLASH Bank configuration here - FIXME XXX */
  63
  64        debug("[%s, %d] Calling flash_get_size ...\n", __FUNCTION__, __LINE__);
  65        size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  66
  67        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  68                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  69                        size, size<<20);
  70        }
  71
  72        debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
  73
  74        /* Setup offsets */
  75        flash_get_offsets (-size, &flash_info[0]);
  76        debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
  77
  78        /* Re-do sizing to get full correct info */
  79        mtdcr(EBC0_CFGADDR, PB0CR);
  80        pbcr = mfdcr(EBC0_CFGDATA);
  81        mtdcr(EBC0_CFGADDR, PB0CR);
  82        base = -size;
  83        switch (size) {
  84        case 1 << 20:
  85                size_val = 0;
  86                break;
  87        case 2 << 20:
  88                size_val = 1;
  89                break;
  90        case 4 << 20:
  91                size_val = 2;
  92                break;
  93        case 8 << 20:
  94                size_val = 3;
  95                break;
  96        case 16 << 20:
  97                size_val = 4;
  98                break;
  99        }
 100        pbcr = (pbcr & 0x0001ffff) | base | (size_val << 17);
 101        mtdcr(EBC0_CFGDATA, pbcr);
 102        debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
 103
 104        /* Monitor protection ON by default */
 105        (void)flash_protect(FLAG_PROTECT_SET,
 106                            -CONFIG_SYS_MONITOR_LEN,
 107                            0xffffffff,
 108                            &flash_info[0]);
 109
 110        debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
 111        flash_info[0].size  = size;
 112
 113        return (size);
 114#endif
 115}
 116