/*
 *  Copyright (C) 2010 Christian Glindkamp <christian.glindkamp@taskit.de>
 *                     taskit GmbH
 *
 * 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/mm.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/w1-gpio.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include <mach/at91sam9_smc.h>

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


void __init stamp9g20_init_early(void)
{
        /* Initialize processor: 18.432 MHz crystal */
        at91_initialize(18432000);
}

/*
 * NAND flash
 */
static struct atmel_nand_data __initdata nand_data = {
        .ale            = 21,
        .cle            = 22,
        .rdy_pin        = AT91_PIN_PC13,
        .enable_pin     = AT91_PIN_PC14,
        .bus_width_16   = 0,
        .det_pin        = -EINVAL,
        .ecc_mode       = NAND_ECC_SOFT,
};

static struct sam9_smc_config __initdata nand_smc_config = {
        .ncs_read_setup         = 0,
        .nrd_setup              = 2,
        .ncs_write_setup        = 0,
        .nwe_setup              = 2,

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

        .read_cycle             = 7,
        .write_cycle            = 7,

        .mode                   = AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE | AT91_SMC_DBW_8,
        .tdf_cycles             = 3,
};

static void __init add_device_nand(void)
{
        /* configure chip-select 3 (NAND) */
        sam9_smc_configure(0, 3, &nand_smc_config);

        at91_add_device_nand(&nand_data);
}


/*
 * MCI (SD/MMC)
 * det_pin, wp_pin and vcc_pin are not connected
 */
static struct mci_platform_data __initdata mmc_data = {
        .slot[0] = {
                .bus_width      = 4,
                .detect_pin     = -1,
                .wp_pin         = -1,
        },
};


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


/*
 * USB Device port
 */
static struct at91_udc_data __initdata portuxg20_udc_data = {
        .vbus_pin       = AT91_PIN_PC7,
        .pullup_pin     = -EINVAL,              /* pull-up driven by UDC */
};

static struct at91_udc_data __initdata stamp9g20evb_udc_data = {
        .vbus_pin       = AT91_PIN_PA22,
        .pullup_pin     = -EINVAL,              /* pull-up driven by UDC */
};


/*
 * MACB Ethernet device
 */
static struct macb_platform_data __initdata macb_data = {
        .phy_irq_pin    = AT91_PIN_PA28,
        .is_rmii        = 1,
};


/*
 * LEDs
 */
static struct gpio_led portuxg20_leds[] = {
        {
                .name                   = "LED2",
                .gpio                   = AT91_PIN_PC5,
                .default_trigger        = "none",
        }, {
                .name                   = "LED3",
                .gpio                   = AT91_PIN_PC4,
                .default_trigger        = "none",
        }, {
                .name                   = "LED4",
                .gpio                   = AT91_PIN_PC10,
                .default_trigger        = "heartbeat",
        }
};

static struct gpio_led stamp9g20evb_leds[] = {
        {
                .name                   = "D8",
                .gpio                   = AT91_PIN_PB18,
                .active_low             = 1,
                .default_trigger        = "none",
        }, {
                .name                   = "D9",
                .gpio                   = AT91_PIN_PB19,
                .active_low             = 1,
                .default_trigger        = "none",
        }, {
                .name                   = "D10",
                .gpio                   = AT91_PIN_PB20,
                .active_low             = 1,
                .default_trigger        = "heartbeat",
        }
};


/*
 * SPI devices
 */
static struct spi_board_info portuxg20_spi_devices[] = {
        {
                .modalias       = "spidev",
                .chip_select    = 0,
                .max_speed_hz   = 1 * 1000 * 1000,
                .bus_num        = 0,
        }, {
                .modalias       = "spidev",
                .chip_select    = 0,
                .max_speed_hz   = 1 * 1000 * 1000,
                .bus_num        = 1,
        },
};


/*
 * Dallas 1-Wire
 */
static struct w1_gpio_platform_data w1_gpio_pdata = {
        .pin            = AT91_PIN_PA29,
        .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,
};

void add_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);
}


void __init stamp9g20_board_init(void)
{
        /* Serial */
        /* DGBU on ttyS0. (Rx & Tx only) */
        at91_register_uart(0, 0, 0);
        at91_add_device_serial();
        /* NAND */
        add_device_nand();
        /* MMC */
        at91_add_device_mci(0, &mmc_data);
        /* W1 */
        add_w1();
}

static void __init portuxg20_board_init(void)
{
        /* 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, CTS, RTS) */
        at91_register_uart(AT91SAM9260_ID_US1, 2, ATMEL_UART_CTS | ATMEL_UART_RTS);

        /* USART2 on ttyS3. (Rx, Tx, CTS, RTS) */
        at91_register_uart(AT91SAM9260_ID_US2, 3, 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);
        stamp9g20_board_init();
        /* USB Host */
        at91_add_device_usbh(&usbh_data);
        /* USB Device */
        at91_add_device_udc(&portuxg20_udc_data);
        /* Ethernet */
        at91_add_device_eth(&macb_data);
        /* I2C */
        at91_add_device_i2c(NULL, 0);
        /* SPI */
        at91_add_device_spi(portuxg20_spi_devices, ARRAY_SIZE(portuxg20_spi_devices));
        /* LEDs */
        at91_gpio_leds(portuxg20_leds, ARRAY_SIZE(portuxg20_leds));
}

static void __init stamp9g20evb_board_init(void)
{
        /* 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);
        stamp9g20_board_init();
        /* USB Host */
        at91_add_device_usbh(&usbh_data);
        /* USB Device */
        at91_add_device_udc(&stamp9g20evb_udc_data);
        /* Ethernet */
        at91_add_device_eth(&macb_data);
        /* I2C */
        at91_add_device_i2c(NULL, 0);
        /* LEDs */
        at91_gpio_leds(stamp9g20evb_leds, ARRAY_SIZE(stamp9g20evb_leds));
}

MACHINE_START(PORTUXG20, "taskit PortuxG20")
        /* Maintainer: taskit GmbH */
        .init_time      = at91sam926x_pit_init,
        .map_io         = at91_map_io,
        .handle_irq     = at91_aic_handle_irq,
        .init_early     = stamp9g20_init_early,
        .init_irq       = at91_init_irq_default,
        .init_machine   = portuxg20_board_init,
MACHINE_END

MACHINE_START(STAMP9G20, "taskit Stamp9G20")
        /* Maintainer: taskit GmbH */
        .init_time      = at91sam926x_pit_init,
        .map_io         = at91_map_io,
        .handle_irq     = at91_aic_handle_irq,
        .init_early     = stamp9g20_init_early,
        .init_irq       = at91_init_irq_default,
        .init_machine   = stamp9g20evb_board_init,
MACHINE_END