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
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 struct 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
  49 static 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
  66 int 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
  81 phys_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
  99 int board_early_init_r(void)
 100 {
 101         gd->bd->bi_phy_id[0] = 0x00;
 102         return 0;
 103 }
 104
 105 #ifdef CONFIG_CMD_NET
 106 int 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: */