board/earthlcd/favr-32-ezkit/favr-32-ezkit.c

   1 /*
   2  * Copyright (C) 2008 Atmel Corporation
   3  *
   4  * See file CREDITS for list of people who contributed to this project.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  18  * Place, Suite 330, Boston, MA 02111-1307 USA
  19  */
  20 #include <common.h>
  21 #include <netdev.h>
  22
  23 #include <asm/io.h>
  24 #include <asm/sdram.h>
  25 #include <asm/arch/clk.h>
  26 #include <asm/arch/hmatrix.h>
  27 #include <asm/arch/mmu.h>
  28 #include <asm/arch/portmux.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 struct mmu_vm_range mmu_vmr_table[CONFIG_SYS_NR_VM_REGIONS] = {
  33         {
  34                 .virt_pgno      = CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT,
  35                 .nr_pages       = CONFIG_SYS_FLASH_SIZE >> PAGE_SHIFT,
  36                 .phys           = (CONFIG_SYS_FLASH_BASE >> PAGE_SHIFT)
  37                                         | MMU_VMR_CACHE_NONE,
  38         }, {
  39                 .virt_pgno      = CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT,
  40                 .nr_pages       = EBI_SDRAM_SIZE >> PAGE_SHIFT,
  41                 .phys           = (CONFIG_SYS_SDRAM_BASE >> PAGE_SHIFT)
  42                                         | MMU_VMR_CACHE_WRBACK,
  43         },
  44 };
  45
  46 static const struct sdram_config sdram_config = {
  47         /* MT48LC4M32B2P-6 (16 MB) */
  48         .data_bits      = SDRAM_DATA_32BIT,
  49         .row_bits       = 12,
  50         .col_bits       = 8,
  51         .bank_bits      = 2,
  52         .cas            = 3,
  53         .twr            = 2,
  54         .trc            = 7,
  55         .trp            = 2,
  56         .trcd           = 2,
  57         .tras           = 5,
  58         .txsr           = 5,
  59         /* 15.6 us */
  60         .refresh_period = (156 * (SDRAMC_BUS_HZ / 1000)) / 10000,
  61 };
  62
  63 int board_early_init_f(void)
  64 {
  65         /* Enable SDRAM in the EBI mux */
  66         hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
  67
  68         portmux_enable_ebi(32, 23, 0, PORTMUX_DRIVE_HIGH);
  69         portmux_enable_usart3(PORTMUX_DRIVE_MIN);
  70 #if defined(CONFIG_MACB)
  71         portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH);
  72 #endif
  73 #if defined(CONFIG_MMC)
  74         portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW);
  75 #endif
  76
  77         return 0;
  78 }
  79
  80 phys_size_t initdram(int board_type)
  81 {
  82         unsigned long expected_size;
  83         unsigned long actual_size;
  84         void *sdram_base;
  85
  86         sdram_base = uncached(EBI_SDRAM_BASE);
  87
  88         expected_size = sdram_init(sdram_base, &sdram_config);
  89         actual_size = get_ram_size(sdram_base, expected_size);
  90
  91         if (expected_size != actual_size)
  92                 printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
  93                                 actual_size >> 20, expected_size >> 20);
  94
  95         return actual_size;
  96 }
  97
  98 int board_early_init_r(void)
  99 {
 100         gd->bd->bi_phy_id[0] = 0x01;
 101         return 0;
 102 }
 103
 104 #if defined(CONFIG_MACB) && defined(CONFIG_CMD_NET)
 105 int board_eth_init(bd_t *bi)
 106 {
 107         return macb_eth_initialize(0, (void *)MACB0_BASE, bi->bi_phy_id[0]);
 108 }
 109 #endif