aiot/waterInvestigationHiddenDanger/main.c

/*
 * linux/arch/arm/mach-at91/board-sam9261ek.c
 *
 *  Copyright (C) 2005 SAN People
 *  Copyright (C) 2006 Atmel
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/types.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <linux/spi/at73c213.h>
#include <linux/clk.h>
#include <linux/dm9000.h>
#include <linux/fb.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>

#include <video/atmel_lcdc.h>

#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/irq.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <mach/hardware.h>
#include <mach/at91sam9_smc.h>
#include <mach/system_rev.h>

#include "at91_aic.h"
#include "at91_shdwc.h"
#include "board.h"
#include "sam9_smc.h"
#include "generic.h"


static void __init ek_init_early(void)
{
	/* Initialize processor: 18.432 MHz crystal */
	at91_initialize(18432000);
}

/*
 * DM9000 ethernet device
 */
#if defined(CONFIG_DM9000)
static struct resource dm9000_resource[] = {
	[0] = {
		.start	= AT91_CHIPSELECT_2,
		.end	= AT91_CHIPSELECT_2 + 3,
		.flags	= IORESOURCE_MEM
	},
	[1] = {
		.start	= AT91_CHIPSELECT_2 + 0x44,
		.end	= AT91_CHIPSELECT_2 + 0xFF,
		.flags	= IORESOURCE_MEM
	},
	[2] = {
		.flags	= IORESOURCE_IRQ
			| IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE,
	}
};

static struct dm9000_plat_data dm9000_platdata = {
	.flags		= DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM,
};

static struct platform_device dm9000_device = {
	.name		= "dm9000",
	.id		= 0,
	.num_resources	= ARRAY_SIZE(dm9000_resource),
	.resource	= dm9000_resource,
	.dev		= {
		.platform_data	= &dm9000_platdata,
	}
};

/*
 * SMC timings for the DM9000.
 * Note: These timings were calculated for MASTER_CLOCK = 100000000 according to the DM9000 timings.
 */
static struct sam9_smc_config __initdata dm9000_smc_config = {
	.ncs_read_setup		= 0,
	.nrd_setup		= 2,
	.ncs_write_setup	= 0,
	.nwe_setup		= 2,

	.ncs_read_pulse		= 8,
	.nrd_pulse		= 4,
	.ncs_write_pulse	= 8,
	.nwe_pulse		= 4,

	.read_cycle		= 16,
	.write_cycle		= 16,

	.mode			= AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE | AT91_SMC_BAT_WRITE | AT91_SMC_DBW_16,
	.tdf_cycles		= 1,
};

static void __init ek_add_device_dm9000(void)
{
	struct resource *r = &dm9000_resource[2];

	/* Configure chip-select 2 (DM9000) */
	sam9_smc_configure(0, 2, &dm9000_smc_config);

	/* Configure Reset signal as output */
	at91_set_gpio_output(AT91_PIN_PC10, 0);

	/* Configure Interrupt pin as input, no pull-up */
	at91_set_gpio_input(AT91_PIN_PC11, 0);

	r->start = r->end = gpio_to_irq(AT91_PIN_PC11);
	platform_device_register(&dm9000_device);
}
#else
static void __init ek_add_device_dm9000(void) {}
#endif /* CONFIG_DM9000 */


/*
 * USB Host Port
 */
static struct at91_usbh_data __initdata ek_usbh_data = {
	.ports		= 2,
	.vbus_pin	= {-EINVAL, -EINVAL},
	.overcurrent_pin= {-EINVAL, -EINVAL},
};


/*
 * USB Device Port
 */
static struct at91_udc_data __initdata ek_udc_data = {
	.vbus_pin	= AT91_PIN_PB29,
	.pullup_pin	= -EINVAL,		/* pull-up driven by UDC */
};


/*
 * NAND flash
 */
static struct mtd_partition __initdata ek_nand_partition[] = {
	{
		.name	= "Partition 1",
		.offset	= 0,
		.size	= SZ_256K,
	},
	{
		.name	= "Partition 2",
		.offset	= MTDPART_OFS_NXTBLK,
		.size	= MTDPART_SIZ_FULL,
	},
};

static struct atmel_nand_data __initdata ek_nand_data = {
	.ale		= 22,
	.cle		= 21,
	.det_pin	= -EINVAL,
	.rdy_pin	= AT91_PIN_PC15,
	.enable_pin	= AT91_PIN_PC14,
	.ecc_mode	= NAND_ECC_SOFT,
	.on_flash_bbt	= 1,
	.parts		= ek_nand_partition,
	.num_parts	= ARRAY_SIZE(ek_nand_partition),
};

static struct sam9_smc_config __initdata ek_nand_smc_config = {
	.ncs_read_setup		= 0,
	.nrd_setup		= 1,
	.ncs_write_setup	= 0,
	.nwe_setup		= 1,

	.ncs_read_pulse		= 3,
	.nrd_pulse		= 3,
	.ncs_write_pulse	= 3,
	.nwe_pulse		= 3,

	.read_cycle		= 5,
	.write_cycle		= 5,

	.mode			= AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE,
	.tdf_cycles		= 2,
};

static void __init ek_add_device_nand(void)
{
	ek_nand_data.bus_width_16 = board_have_nand_16bit();
	/* setup bus-width (8 or 16) */
	if (ek_nand_data.bus_width_16)
		ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
	else
		ek_nand_smc_config.mode |= AT91_SMC_DBW_8;

	/* configure chip-select 3 (NAND) */
	sam9_smc_configure(0, 3, &ek_nand_smc_config);

	at91_add_device_nand(&ek_nand_data);
}

/*
 * SPI related devices
 */
#if defined(CONFIG_SPI_ATMEL) || defined(CONFIG_SPI_ATMEL_MODULE)

/*
 * ADS7846 Touchscreen
 */
#if defined(CONFIG_TOUCHSCREEN_ADS7846) || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)

static int ads7843_pendown_state(void)
{
	return !at91_get_gpio_value(AT91_PIN_PC2);	/* Touchscreen PENIRQ */
}

static struct ads7846_platform_data ads_info = {
	.model			= 7843,
	.x_min			= 150,
	.x_max			= 3830,
	.y_min			= 190,
	.y_max			= 3830,
	.vref_delay_usecs	= 100,
	.x_plate_ohms		= 450,
	.y_plate_ohms		= 250,
	.pressure_max		= 15000,
	.debounce_max		= 1,
	.debounce_rep		= 0,
	.debounce_tol		= (~0),
	.get_pendown_state	= ads7843_pendown_state,
};

static void __init ek_add_device_ts(void)
{
	at91_set_B_periph(AT91_PIN_PC2, 1);	/* External IRQ0, with pullup */
	at91_set_gpio_input(AT91_PIN_PA11, 1);	/* Touchscreen BUSY signal */
}
#else
static void __init ek_add_device_ts(void) {}
#endif

/*
 * Audio
 */
static struct at73c213_board_info at73c213_data = {
	.ssc_id		= 1,
#if defined(CONFIG_MACH_AT91SAM9261EK)
	.shortname	= "AT91SAM9261-EK external DAC",
#else
	.shortname	= "AT91SAM9G10-EK external DAC",
#endif
};

#if defined(CONFIG_SND_AT73C213) || defined(CONFIG_SND_AT73C213_MODULE)
static void __init at73c213_set_clk(struct at73c213_board_info *info)
{
	struct clk *pck2;
	struct clk *plla;

	pck2 = clk_get(NULL, "pck2");
	plla = clk_get(NULL, "plla");

	/* AT73C213 MCK Clock */
	at91_set_B_periph(AT91_PIN_PB31, 0);	/* PCK2 */

	clk_set_parent(pck2, plla);
	clk_put(plla);

	info->dac_clk = pck2;
}
#else
static void __init at73c213_set_clk(struct at73c213_board_info *info) {}
#endif

/*
 * SPI devices
 */
static struct spi_board_info ek_spi_devices[] = {
	{	/* DataFlash chip */
		.modalias	= "mtd_dataflash",
		.chip_select	= 0,
		.max_speed_hz	= 15 * 1000 * 1000,
		.bus_num	= 0,
	},
#if defined(CONFIG_TOUCHSCREEN_ADS7846) || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
	{
		.modalias	= "ads7846",
		.chip_select	= 2,
		.max_speed_hz	= 125000 * 26,	/* (max sample rate @ 3V) * (cmd + data + overhead) */
		.bus_num	= 0,