board/atmel/atngw100/atngw100.c

   1 /*
   2  * Copyright (C) 2006 Atmel Corporation
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22 #include <common.h>
  23
  24 #include <asm/io.h>
  25 #include <asm/sdram.h>
  26 #include <asm/arch/clk.h>
  27 #include <asm/arch/gpio.h>
  28 #include <asm/arch/hmatrix.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 static const struct sdram_config sdram_config = {
  33         .data_bits      = SDRAM_DATA_16BIT,
  34         .row_bits       = 13,
  35         .col_bits       = 9,
  36         .bank_bits      = 2,
  37         .cas            = 3,
  38         .twr            = 2,
  39         .trc            = 7,
  40         .trp            = 2,
  41         .trcd           = 2,
  42         .tras           = 5,
  43         .txsr           = 5,
  44         /* 7.81 us */
  45         .refresh_period = (781 * (SDRAMC_BUS_HZ / 1000)) / 100000,
  46 };
  47
  48 int board_early_init_f(void)
  49 {
  50         /* Enable SDRAM in the EBI mux */
  51         hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
  52
  53         gpio_enable_ebi();
  54         gpio_enable_usart1();
  55
  56 #if defined(CONFIG_MACB)
  57         gpio_enable_macb0();
  58         gpio_enable_macb1();
  59 #endif
  60 #if defined(CONFIG_MMC)
  61         gpio_enable_mmci();
  62 #endif
  63
  64         return 0;
  65 }
  66
  67 long int initdram(int board_type)
  68 {
  69         unsigned long expected_size;
  70         unsigned long actual_size;
  71         void *sdram_base;
  72
  73         sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
  74
  75         expected_size = sdram_init(sdram_base, &sdram_config);
  76         actual_size = get_ram_size(sdram_base, expected_size);
  77
  78         unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
  79
  80         if (expected_size != actual_size)
  81                 printf("Warning: Only %u of %u MiB SDRAM is working\n",
  82                                 actual_size >> 20, expected_size >> 20);
  83
  84         return actual_size;
  85 }
  86
  87 void board_init_info(void)
  88 {
  89         gd->bd->bi_phy_id[0] = 0x01;
  90         gd->bd->bi_phy_id[1] = 0x03;
  91 }