LXR uboot/board/in-circuit/grasshopper/grasshopper.c

   1/*
   2 * Copyright (C) 2011
   3 * Corscience GmbH & Co.KG, Andreas Bießmann <biessmann@corscience.de>
   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#include <common.h>
  24
  25#include <asm/io.h>
  26#include <asm/sdram.h>
  27#include <asm/arch/clk.h>
  28#include <asm/arch/hmatrix.h>
  29#include <asm/arch/mmu.h>
  30#include <asm/arch/portmux.h>
  31#include <netdev.h>
  32
  33DECLARE_GLOBAL_DATA_PTR;
  34
  35struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
  36        {
  37                .virt_pgno      = CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT,
  38                .nr_pages       = CONFIG_SYS_FLASH_SIZE >> PAGE_SHIFT,
  39                .phys           = (CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT)
  40                                | MMU_VMR_CACHE_NONE,
  41        }, {
  42                .virt_pgno      = CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT,
  43                .nr_pages       = EBI_SDRAM_SIZE >> PAGE_SHIFT,
  44                .phys           = (CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT)
  45                                | MMU_VMR_CACHE_WRBACK,
  46        },
  47};
  48
  49static const struct sdram_config sdram_config = {
  50        /* Dual MT48LC16M16A2-7E (or equal) */
  51        .data_bits              = SDRAM_DATA_32BIT,
  52        .row_bits               = 13,
  53        .col_bits               = 9,
  54        .bank_bits              = 2,
  55        .cas                    = 2,
  56        .twr                    = 2,
  57        .trc                    = 7,
  58        .trp                    = 2,
  59        .trcd                   = 2,
  60        .tras                   = 4,
  61        .txsr                   = 7,
  62        /* 7.81 us */
  63        .refresh_period         = (781 * (SDRAMC_BUS_HZ / 1000)) / 100000,
  64};
  65
  66int board_early_init_f(void)
  67{
  68        /* Enable SDRAM in the EBI mux */
  69        hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
  70
  71        portmux_enable_ebi(SDRAM_DATA_32BIT, 23, 0, PORTMUX_DRIVE_HIGH);
  72        portmux_enable_usart0(PORTMUX_DRIVE_MIN);
  73        portmux_enable_usart1(PORTMUX_DRIVE_MIN);
  74#if defined(CONFIG_MACB)
  75        portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_LOW);
  76#endif
  77
  78        return 0;
  79}
  80
  81phys_size_t initdram(int board_type)
  82{
  83        unsigned long expected_size;
  84        unsigned long actual_size;
  85        void *sdram_base;
  86
  87        sdram_base = uncached(EBI_SDRAM_BASE);
  88
  89        expected_size = sdram_init(sdram_base, &sdram_config);
  90        actual_size = get_ram_size(sdram_base, expected_size);
  91
  92        if (expected_size != actual_size)
  93                printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
  94                                actual_size >> 20, expected_size >> 20);
  95
  96        return actual_size;
  97}
  98
  99int board_early_init_r(void)
 100{
 101        gd->bd->bi_phy_id[0] = 0x00;
 102        return 0;
 103}
 104
 105#ifdef CONFIG_CMD_NET
 106int board_eth_init(bd_t *bi)
 107{
 108        macb_eth_initialize(0, (void *)ATMEL_BASE_MACB0, bi->bi_phy_id[0]);
 109        return 0;
 110}
 111#endif
 112/* vim: set noet ts=8: */
 113