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, 2012 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 #include <asm/io.h>
  31
  32 DECLARE_GLOBAL_DATA_PTR;
  33
  34 int checkboard(void)
  35 {
  36         puts("Board: ");
  37         puts("Freescale M53017EVB\n");
  38         return 0;
  39 };
  40
  41 phys_size_t initdram(int board_type)
  42 {
  43         sdram_t *sdram = (sdram_t *)(MMAP_SDRAM);
  44         u32 dramsize, i;
  45
  46         dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
  47
  48         for (i = 0x13; i < 0x20; i++) {
  49                 if (dramsize == (1 << i))
  50                         break;
  51         }
  52         i--;
  53
  54         out_be32(&sdram->cs0, CONFIG_SYS_SDRAM_BASE | i);
  55 #ifdef CONFIG_SYS_SDRAM_BASE1
  56         out_be32(&sdram->cs1, CONFIG_SYS_SDRAM_BASE | i);
  57 #endif
  58         out_be32(&sdram->cfg1, CONFIG_SYS_SDRAM_CFG1);
  59         out_be32(&sdram->cfg2, CONFIG_SYS_SDRAM_CFG2);
  60
  61         udelay(500);
  62
  63         /* Issue PALL */
  64         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  65         asm("nop");
  66
  67         /* Perform two refresh cycles */
  68         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  69         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  70         asm("nop");
  71
  72         /* Issue LEMR */
  73         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE);
  74         asm("nop");
  75         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_EMOD);
  76         asm("nop");
  77
  78         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  79         asm("nop");
  80
  81         out_be32(&sdram->ctrl,
  82                 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
  83         asm("nop");
  84
  85         udelay(100);
  86
  87         return dramsize;
  88 };
  89
  90 int testdram(void)
  91 {
  92         /* TODO: XXX XXX XXX */
  93         printf("DRAM test not implemented!\n");
  94
  95         return (0);
  96 }