linux_kernel/arch/arm/mach-at91/board-foxg20.c

/*
 *  Copyright (C) 2005 SAN People
 *  Copyright (C) 2008 Atmel
 *  Copyright (C) 2010 Lee McLoughlin - lee@lmmrtech.com
 *  Copyright (C) 2010 Sergio Tanzilli - tanzilli@acmesystems.it
 *
 * 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/init.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/at73c213.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/clk.h>
#include <linux/w1-gpio.h>

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

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

/*
 * The FOX Board G20 hardware comes as the "Netus G20" board with
 * just the cpu, ram, dataflash and two header connectors.
 * This is plugged into the FOX Board which provides the ethernet,
 * usb, rtc, leds, switch, ...
 *
 * For more info visit: http://www.acmesystems.it/foxg20
 */


static void __init foxg20_init_early(void)
{
	/* Initialize processor: 18.432 MHz crystal */
	at91_initialize(18432000);
}

/*
 * USB Host port
 */
static struct at91_usbh_data __initdata foxg20_usbh_data = {
	.ports		= 2,
	.vbus_pin	= {-EINVAL, -EINVAL},
	.overcurrent_pin= {-EINVAL, -EINVAL},
};

/*
 * USB Device port
 */
static struct at91_udc_data __initdata foxg20_udc_data = {
	.vbus_pin	= AT91_PIN_PC6,
	.pullup_pin	= -EINVAL,		/* pull-up driven by UDC */
};


/*
 * SPI devices.
 */
static struct spi_board_info foxg20_spi_devices[] = {
#if !IS_ENABLED(CONFIG_MMC_ATMELMCI)
	{
		.modalias	= "mtd_dataflash",
		.chip_select	= 1,
		.max_speed_hz	= 15 * 1000 * 1000,
		.bus_num	= 0,
	},
#endif
};


/*
 * MACB Ethernet device
 */
static struct macb_platform_data __initdata foxg20_macb_data = {
	.phy_irq_pin	= AT91_PIN_PA7,
	.is_rmii	= 1,
};

/*
 * MCI (SD/MMC)
 * det_pin, wp_pin and vcc_pin are not connected
 */
static struct mci_platform_data __initdata foxg20_mci0_data = {
	.slot[1] = {
		.bus_width	= 4,
		.detect_pin	= -EINVAL,
		.wp_pin		= -EINVAL,
	},
};


/*
 * LEDs
 */
static struct gpio_led foxg20_leds[] = {
	{	/* user led, red */
		.name			= "user_led",
		.gpio			= AT91_PIN_PC7,
		.active_low		= 0,
		.default_trigger	= "heartbeat",
	},
};


/*
 * GPIO Buttons
 */
#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
static struct gpio_keys_button foxg20_buttons[] = {
	{
		.gpio		= AT91_PIN_PC4,
		.code		= BTN_1,
		.desc		= "Button 1",
		.active_low	= 1,
		.wakeup		= 1,
	},
};

static struct gpio_keys_platform_data foxg20_button_data = {
	.buttons	= foxg20_buttons,
	.nbuttons	= ARRAY_SIZE(foxg20_buttons),
};

static struct platform_device foxg20_button_device = {
	.name		= "gpio-keys",
	.id		= -1,
	.num_resources	= 0,
	.dev		= {
		.platform_data	= &foxg20_button_data,
	}
};

static void __init foxg20_add_device_buttons(void)
{
	at91_set_gpio_input(AT91_PIN_PC4, 1);	/* btn1 */
	at91_set_deglitch(AT91_PIN_PC4, 1);

	platform_device_register(&foxg20_button_device);
}
#else
static void __init foxg20_add_device_buttons(void) {}
#endif


#if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
static struct w1_gpio_platform_data w1_gpio_pdata = {
	/* If you choose to use a pin other than PB16 it needs to be 3.3V */
	.pin		= AT91_PIN_PB16,
	.is_open_drain  = 1,
	.ext_pullup_enable_pin	= -EINVAL,
};

static struct platform_device w1_device = {
	.name			= "w1-gpio",
	.id			= -1,
	.dev.platform_data	= &w1_gpio_pdata,
};

static void __init at91_add_device_w1(void)
{
	at91_set_GPIO_periph(w1_gpio_pdata.pin, 1);
	at91_set_multi_drive(w1_gpio_pdata.pin, 1);
	platform_device_register(&w1_device);
}

#endif


static struct i2c_board_info __initdata foxg20_i2c_devices[] = {
	{
		I2C_BOARD_INFO("24c512", 0x50),
	},
};


static void __init foxg20_board_init(void)
{
	/* Serial */
	/* DBGU on ttyS0. (Rx & Tx only) */
	at91_register_uart(0, 0, 0);

	/* USART0 on ttyS1. (Rx, Tx, CTS, RTS, DTR, DSR, DCD, RI) */
	at91_register_uart(AT91SAM9260_ID_US0, 1,
				ATMEL_UART_CTS
				| ATMEL_UART_RTS
				| ATMEL_UART_DTR
				| ATMEL_UART_DSR
				| ATMEL_UART_DCD
				| ATMEL_UART_RI);

	/* USART1 on ttyS2. (Rx, Tx, RTS, CTS) */
	at91_register_uart(AT91SAM9260_ID_US1, 2,
		ATMEL_UART_CTS
		| ATMEL_UART_RTS);

	/* USART2 on ttyS3. (Rx & Tx only) */
	at91_register_uart(AT91SAM9260_ID_US2, 3, 0);

	/* USART3 on ttyS4. (Rx, Tx, RTS, CTS) */
	at91_register_uart(AT91SAM9260_ID_US3, 4,
		ATMEL_UART_CTS
		| ATMEL_UART_RTS);

	/* USART4 on ttyS5. (Rx & Tx only) */
	at91_register_uart(AT91SAM9260_ID_US4, 5, 0);

	/* USART5 on ttyS6. (Rx & Tx only) */
	at91_register_uart(AT91SAM9260_ID_US5, 6, 0);

	/* Set the internal pull-up resistor on DRXD */
	at91_set_A_periph(AT91_PIN_PB14, 1);
	at91_add_device_serial();
	/* USB Host */
	at91_add_device_usbh(&foxg20_usbh_data);
	/* USB Device */
	at91_add_device_udc(&foxg20_udc_data);
	/* SPI */
	at91_add_device_spi(foxg20_spi_devices, ARRAY_SIZE(foxg20_spi_devices));
	/* Ethernet */
	at91_add_device_eth(&foxg20_macb_data);
	/* MMC */
	at91_add_device_mci(0, &foxg20_mci0_data);
	/* I2C */
	at91_add_device_i2c(foxg20_i2c_devices, ARRAY_SIZE(foxg20_i2c_devices));
	/* LEDs */
	at91_gpio_leds(foxg20_leds, ARRAY_SIZE(foxg20_leds));
	/* Push Buttons */
	foxg20_add_device_buttons();
#if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
	at91_add_device_w1();
#endif
}

MACHINE_START(ACMENETUSFOXG20, "Acme Systems srl FOX Board G20")
	/* Maintainer: Sergio Tanzilli */
	.init_time	= at91sam926x_pit_init,
	.map_io		= at91_map_io,
	.handle_irq	= at91_aic_handle_irq,
	.init_early	= foxg20_init_early,
	.init_irq	= at91_init_irq_default,
	.init_machine	= foxg20_board_init,
MACHINE_END