board/freescale/m53017evb/m53017evb.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
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 int checkboard(void)
  34 {
  35         puts("Board: ");
  36         puts("Freescale M53017EVB\n");
  37         return 0;
  38 };
  39
  40 phys_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
  88 int testdram(void)
  89 {
  90         /* TODO: XXX XXX XXX */
  91         printf("DRAM test not implemented!\n");
  92
  93         return (0);
  94 }