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5f723a3b98
The ATNGW100 has 8MB DataFlash on board. Give users access to it through the new SPI flash framework. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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* Copyright (C) 2006 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/sdram.h>
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#include <asm/arch/clk.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/hmatrix.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const struct sdram_config sdram_config = {
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.data_bits = SDRAM_DATA_16BIT,
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.row_bits = 13,
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.col_bits = 9,
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.bank_bits = 2,
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.cas = 3,
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.twr = 2,
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.trc = 7,
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.trp = 2,
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.trcd = 2,
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.tras = 5,
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.txsr = 5,
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/* 7.81 us */
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.refresh_period = (781 * (SDRAMC_BUS_HZ / 1000)) / 100000,
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};
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int board_early_init_f(void)
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{
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/* Enable SDRAM in the EBI mux */
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hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
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gpio_enable_ebi();
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gpio_enable_usart1();
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#if defined(CONFIG_MACB)
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gpio_enable_macb0();
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gpio_enable_macb1();
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#endif
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#if defined(CONFIG_MMC)
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gpio_enable_mmci();
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#endif
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#if defined(CONFIG_ATMEL_SPI)
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gpio_enable_spi0(1 << 0);
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#endif
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return 0;
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}
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phys_size_t initdram(int board_type)
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{
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unsigned long expected_size;
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unsigned long actual_size;
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void *sdram_base;
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sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);
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expected_size = sdram_init(sdram_base, &sdram_config);
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actual_size = get_ram_size(sdram_base, expected_size);
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unmap_physmem(sdram_base, EBI_SDRAM_SIZE);
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if (expected_size != actual_size)
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printf("Warning: Only %u of %u MiB SDRAM is working\n",
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actual_size >> 20, expected_size >> 20);
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return actual_size;
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}
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void board_init_info(void)
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{
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gd->bd->bi_phy_id[0] = 0x01;
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gd->bd->bi_phy_id[1] = 0x03;
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}
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/* SPI chip select control */
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#ifdef CONFIG_ATMEL_SPI
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#include <spi.h>
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#define ATNGW100_DATAFLASH_CS_PIN GPIO_PIN_PA3
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int spi_cs_is_valid(unsigned int bus, unsigned int cs)
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{
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return bus == 0 && cs == 0;
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}
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void spi_cs_activate(struct spi_slave *slave)
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{
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gpio_set_value(ATNGW100_DATAFLASH_CS_PIN, 0);
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}
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void spi_cs_deactivate(struct spi_slave *slave)
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{
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gpio_set_value(ATNGW100_DATAFLASH_CS_PIN, 1);
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}
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#endif /* CONFIG_ATMEL_SPI */
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