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 #include <netdev.h>
  30
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 static const struct sdram_config sdram_config = {
  34         .data_bits      = SDRAM_DATA_16BIT,
  35         .row_bits       = 13,
  36         .col_bits       = 9,
  37         .bank_bits      = 2,
  38         .cas            = 3,
  39         .twr            = 2,
  40         .trc            = 7,
  41         .trp            = 2,
  42         .trcd           = 2,
  43         .tras           = 5,
  44         .txsr           = 5,
  45         /* 7.81 us */
  46         .refresh_period = (781 * (SDRAMC_BUS_HZ / 1000)) / 100000,
  47 };
  48
  49 int board_early_init_f(void)
  50 {
  51         /* Enable SDRAM in the EBI mux */
  52         hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
  53
  54         gpio_enable_ebi();
  55         gpio_enable_usart1();
  56
  57 #if defined(CONFIG_MACB)
  58         gpio_enable_macb0();
  59         gpio_enable_macb1();
  60 #endif
  61 #if defined(CONFIG_MMC)
  62         gpio_enable_mmci();
  63 #endif
  64 #if defined(CONFIG_ATMEL_SPI)
  65         gpio_enable_spi0(1 << 0);
  66 #endif
  67
  68         return 0;
  69 }
  70
  71 phys_size_t initdram(int board_type)
  72 {
  73         unsigned long expected_size;
  74         unsigned long actual_size;
  75         void *sdram_base;
  76
  77         sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
  78
  79         expected_size = sdram_init(sdram_base, &sdram_config);
  80         actual_size = get_ram_size(sdram_base, expected_size);
  81
  82         unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
  83
  84         if (expected_size != actual_size)
  85                 printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
  86                                 actual_size >> 20, expected_size >> 20);
  87
  88         return actual_size;
  89 }
  90
  91 void board_init_info(void)
  92 {
  93         gd->bd->bi_phy_id[0] = 0x01;
  94         gd->bd->bi_phy_id[1] = 0x03;
  95 }
  96
  97 #ifdef CONFIG_CMD_NET
  98 int board_eth_init(bd_t *bi)
  99 {
 100         macb_eth_initialize(0, (void *)MACB0_BASE, bi->bi_phy_id[0]);
 101         macb_eth_initialize(1, (void *)MACB1_BASE, bi->bi_phy_id[1]);
 102         return 0;
 103 }
 104 #endif
 105
 106 /* SPI chip select control */
 107 #ifdef CONFIG_ATMEL_SPI
 108 #include <spi.h>
 109
 110 #define ATNGW100_DATAFLASH_CS_PIN       GPIO_PIN_PA3
 111
 112 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
 113 {
 114         return bus == 0 && cs == 0;
 115 }
 116
 117 void spi_cs_activate(struct spi_slave *slave)
 118 {
 119         gpio_set_value(ATNGW100_DATAFLASH_CS_PIN, 0);
 120 }
 121
 122 void spi_cs_deactivate(struct spi_slave *slave)
 123 {
 124         gpio_set_value(ATNGW100_DATAFLASH_CS_PIN, 1);
 125 }
 126 #endif /* CONFIG_ATMEL_SPI */