LXR uboot/board/freescale/m5208evbe/m5208evbe.c

   1/*
   2 * (C) Copyright 2000-2003
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
   6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
   7 *
   8 * See file CREDITS for list of people who contributed to this
   9 * project.
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License as
  13 * published by the Free Software Foundation; either version 2 of
  14 * the License, or (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24 * MA 02111-1307 USA
  25 */
  26
  27#include <config.h>
  28#include <common.h>
  29#include <asm/immap.h>
  30
  31DECLARE_GLOBAL_DATA_PTR;
  32
  33int checkboard(void)
  34{
  35        puts("Board: ");
  36        puts("Freescale M5208EVBe\n");
  37        return 0;
  38};
  39
  40phys_size_t initdram(int board_type)
  41{
  42        volatile sdram_t *sdram = (volatile sdram_t *)(MMAP_SDRAM);
  43        u32 dramsize, i;
  44
  45        dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
  46
  47        for (i = 0x13; i < 0x20; i++) {
  48                if (dramsize == (1 << i))
  49                        break;
  50        }
  51        i--;
  52
  53        sdram->cs0 = (CONFIG_SYS_SDRAM_BASE | i);
  54#ifdef CONFIG_SYS_SDRAM_BASE1
  55        sdram->cs1 = (CONFIG_SYS_SDRAM_BASE | i);
  56#endif
  57        sdram->cfg1 = CONFIG_SYS_SDRAM_CFG1;
  58        sdram->cfg2 = CONFIG_SYS_SDRAM_CFG2;
  59
  60        udelay(500);
  61
  62        /* Issue PALL */
  63        sdram->ctrl = (CONFIG_SYS_SDRAM_CTRL | 2);
  64        asm("nop");
  65
  66        /* Perform two refresh cycles */
  67        sdram->ctrl = CONFIG_SYS_SDRAM_CTRL | 4;
  68        sdram->ctrl = CONFIG_SYS_SDRAM_CTRL | 4;
  69        asm("nop");
  70
  71        /* Issue LEMR */
  72        sdram->mode = CONFIG_SYS_SDRAM_MODE;
  73        asm("nop");
  74        sdram->mode = CONFIG_SYS_SDRAM_EMOD;
  75        asm("nop");
  76
  77        sdram->ctrl = (CONFIG_SYS_SDRAM_CTRL | 2);
  78        asm("nop");
  79
  80        sdram->ctrl = (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000F00;
  81        asm("nop");
  82
  83        udelay(100);
  84
  85        return dramsize;
  86};
  87
  88int testdram(void)
  89{
  90        /* TODO: XXX XXX XXX */
  91        printf("DRAM test not implemented!\n");
  92
  93        return (0);
  94}
  95