alistair23-linux/arch/arm/mach-davinci/board-dm365-evm.c

/*
 * TI DaVinci DM365 EVM board support
 *
 * Copyright (C) 2009 Texas Instruments Incorporated
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/i2c/at24.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <mach/mux.h>
#include <mach/hardware.h>
#include <mach/dm365.h>
#include <mach/psc.h>
#include <mach/common.h>
#include <mach/i2c.h>
#include <linux/i2c.h>
#include <mach/serial.h>
#include <mach/common.h>
#include <mach/mmc.h>
#include <mach/nand.h>

#define DM365_ASYNC_EMIF_CONTROL_BASE	0x01d10000
#define DM365_ASYNC_EMIF_DATA_CE0_BASE	0x02000000

#define DM365_EVM_PHY_MASK		(0x2)
#define DM365_EVM_MDIO_FREQUENCY	(2200000) /* PHY bus frequency */

/* NOTE:  this is geared for the standard config, with a socketed
 * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors.  If you
 * swap chips with a different block size, partitioning will
 * need to be changed. This NAND chip MT29F16G08FAA is the default
 * NAND shipped with the Spectrum Digital DM365 EVM
 */
#define NAND_BLOCK_SIZE		SZ_128K

static struct mtd_partition davinci_nand_partitions[] = {
	{
		/* UBL (a few copies) plus U-Boot */
		.name		= "bootloader",
		.offset		= 0,
		.size		= 28 * NAND_BLOCK_SIZE,
		.mask_flags	= MTD_WRITEABLE, /* force read-only */
	}, {
		/* U-Boot environment */
		.name		= "params",
		.offset		= MTDPART_OFS_APPEND,
		.size		= 2 * NAND_BLOCK_SIZE,
		.mask_flags	= 0,
	}, {
		.name		= "kernel",
		.offset		= MTDPART_OFS_APPEND,
		.size		= SZ_4M,
		.mask_flags	= 0,
	}, {
		.name		= "filesystem1",
		.offset		= MTDPART_OFS_APPEND,
		.size		= SZ_512M,
		.mask_flags	= 0,
	}, {
		.name		= "filesystem2",
		.offset		= MTDPART_OFS_APPEND,
		.size		= MTDPART_SIZ_FULL,
		.mask_flags	= 0,
	}
	/* two blocks with bad block table (and mirror) at the end */
};

static struct davinci_nand_pdata davinci_nand_data = {
	.mask_chipsel		= BIT(14),
	.parts			= davinci_nand_partitions,
	.nr_parts		= ARRAY_SIZE(davinci_nand_partitions),
	.ecc_mode		= NAND_ECC_HW,
	.options		= NAND_USE_FLASH_BBT,
};

static struct resource davinci_nand_resources[] = {
	{
		.start		= DM365_ASYNC_EMIF_DATA_CE0_BASE,
		.end		= DM365_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
		.flags		= IORESOURCE_MEM,
	}, {
		.start		= DM365_ASYNC_EMIF_CONTROL_BASE,
		.end		= DM365_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
		.flags		= IORESOURCE_MEM,
	},
};

static struct platform_device davinci_nand_device = {
	.name			= "davinci_nand",
	.id			= 0,
	.num_resources		= ARRAY_SIZE(davinci_nand_resources),
	.resource		= davinci_nand_resources,
	.dev			= {
		.platform_data	= &davinci_nand_data,
	},
};

static struct at24_platform_data eeprom_info = {
	.byte_len       = (256*1024) / 8,
	.page_size      = 64,
	.flags          = AT24_FLAG_ADDR16,
	.setup          = davinci_get_mac_addr,
	.context	= (void *)0x7f00,
};

static struct i2c_board_info i2c_info[] = {
	{
		I2C_BOARD_INFO("24c256", 0x50),
		.platform_data	= &eeprom_info,
	},
};

static struct davinci_i2c_platform_data i2c_pdata = {
	.bus_freq	= 400	/* kHz */,
	.bus_delay	= 0	/* usec */,
};

static struct davinci_mmc_config dm365evm_mmc_config = {
	.wires		= 4,
	.max_freq	= 50000000,
	.caps		= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
	.version	= MMC_CTLR_VERSION_2,
};

static void dm365evm_emac_configure(void)
{
	/*
	 * EMAC pins are multiplexed with GPIO and UART
	 * Further details are available at the DM365 ARM
	 * Subsystem Users Guide(sprufg5.pdf) pages 125 - 127
	 */
	davinci_cfg_reg(DM365_EMAC_TX_EN);
	davinci_cfg_reg(DM365_EMAC_TX_CLK);
	davinci_cfg_reg(DM365_EMAC_COL);
	davinci_cfg_reg(DM365_EMAC_TXD3);
	davinci_cfg_reg(DM365_EMAC_TXD2);
	davinci_cfg_reg(DM365_EMAC_TXD1);
	davinci_cfg_reg(DM365_EMAC_TXD0);
	davinci_cfg_reg(DM365_EMAC_RXD3);
	davinci_cfg_reg(DM365_EMAC_RXD2);
	davinci_cfg_reg(DM365_EMAC_RXD1);
	davinci_cfg_reg(DM365_EMAC_RXD0);
	davinci_cfg_reg(DM365_EMAC_RX_CLK);
	davinci_cfg_reg(DM365_EMAC_RX_DV);
	davinci_cfg_reg(DM365_EMAC_RX_ER);
	davinci_cfg_reg(DM365_EMAC_CRS);
	davinci_cfg_reg(DM365_EMAC_MDIO);
	davinci_cfg_reg(DM365_EMAC_MDCLK);

	/*
	 * EMAC interrupts are multiplexed with GPIO interrupts
	 * Details are available at the DM365 ARM
	 * Subsystem Users Guide(sprufg5.pdf) pages 133 - 134
	 */
	davinci_cfg_reg(DM365_INT_EMAC_RXTHRESH);
	davinci_cfg_reg(DM365_INT_EMAC_RXPULSE);
	davinci_cfg_reg(DM365_INT_EMAC_TXPULSE);
	davinci_cfg_reg(DM365_INT_EMAC_MISCPULSE);
}

static void dm365evm_mmc_configure(void)
{
	/*
	 * MMC/SD pins are multiplexed with GPIO and EMIF
	 * Further details are available at the DM365 ARM
	 * Subsystem Users Guide(sprufg5.pdf) pages 118, 128 - 131
	 */
	davinci_cfg_reg(DM365_SD1_CLK);
	davinci_cfg_reg(DM365_SD1_CMD);
	davinci_cfg_reg(DM365_SD1_DATA3);
	davinci_cfg_reg(DM365_SD1_DATA2);
	davinci_cfg_reg(DM365_SD1_DATA1);
	davinci_cfg_reg(DM365_SD1_DATA0);
}

static void __init evm_init_i2c(void)
{
	davinci_init_i2c(&i2c_pdata);
	i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
}

static struct platform_device *dm365_evm_devices[] __initdata = {
	&davinci_nand_device,
};

static struct davinci_uart_config uart_config __initdata = {
	.enabled_uarts = (1 << 0),
};

static void __init dm365_evm_map_io(void)
{
	dm365_init();
}

static __init void dm365_evm_init(void)
{
	struct davinci_soc_info *soc_info = &davinci_soc_info;

	platform_add_devices(dm365_evm_devices,
				ARRAY_SIZE(dm365_evm_devices));

	evm_init_i2c();
	davinci_serial_init(&uart_config);

	dm365evm_emac_configure();
	dm365evm_mmc_configure();

	davinci_setup_mmc(0, &dm365evm_mmc_config);
	davinci_setup_mmc(1, &dm365evm_mmc_config);

	soc_info->emac_pdata->phy_mask = DM365_EVM_PHY_MASK;
	soc_info->emac_pdata->mdio_max_freq = DM365_EVM_MDIO_FREQUENCY;
}

static __init void dm365_evm_irq_init(void)
{
	davinci_irq_init();
}

MACHINE_START(DAVINCI_DM365_EVM, "DaVinci DM365 EVM")
	.phys_io	= IO_PHYS,
	.io_pg_offst	= (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
	.boot_params	= (0x80000100),
	.map_io		= dm365_evm_map_io,
	.init_irq	= dm365_evm_irq_init,
	.timer		= &davinci_timer,
	.init_machine	= dm365_evm_init,
MACHINE_END