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 #if defined(CONFIG_ATMEL_SPI)
  64         gpio_enable_spi0(1 << 0);
  65 #endif
  66
  67         return 0;
  68 }
  69
  70 phys_size_t initdram(int board_type)
  71 {
  72         unsigned long expected_size;
  73         unsigned long actual_size;
  74         void *sdram_base;
  75
  76         sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
  77
  78         expected_size = sdram_init(sdram_base, &sdram_config);
  79         actual_size = get_ram_size(sdram_base, expected_size);
  80
  81         unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
  82
  83         if (expected_size != actual_size)
  84                 printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
  85                                 actual_size >> 20, expected_size >> 20);
  86
  87         return actual_size;
  88 }
  89
  90 void board_init_info(void)
  91 {
  92         gd->bd->bi_phy_id[0] = 0x01;
  93         gd->bd->bi_phy_id[1] = 0x03;
  94 }
  95
  96 /* SPI chip select control */
  97 #ifdef CONFIG_ATMEL_SPI
  98 #include <spi.h>
  99
 100 #define ATNGW100_DATAFLASH_CS_PIN       GPIO_PIN_PA3
 101
 102 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
 103 {
 104         return bus == 0 && cs == 0;
 105 }
 106
 107 void spi_cs_activate(struct spi_slave *slave)
 108 {
 109         gpio_set_value(ATNGW100_DATAFLASH_CS_PIN, 0);
 110 }
 111
 112 void spi_cs_deactivate(struct spi_slave *slave)
 113 {
 114         gpio_set_value(ATNGW100_DATAFLASH_CS_PIN, 1);
 115 }
 116 #endif /* CONFIG_ATMEL_SPI */