/*
 * Maxtor Shared Storage II Board Setup
 *
 * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com>
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/mtd/physmap.h>
#include <linux/mv643xx_eth.h>
#include <linux/leds.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/i2c.h>
#include <linux/ata_platform.h>
#include <linux/gpio.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/pci.h>
#include <mach/orion5x.h>
#include <mach/bridge-regs.h>
#include "common.h"
#include "mpp.h"

#define MSS2_NOR_BOOT_BASE      0xff800000
#define MSS2_NOR_BOOT_SIZE      SZ_256K

/*****************************************************************************
 * Maxtor Shared Storage II Info
 ****************************************************************************/

/*
 * Maxtor Shared Storage II hardware :
 * - Marvell 88F5182-A2 C500
 * - Marvell 88E1111 Gigabit Ethernet PHY
 * - RTC M41T81 (@0x68) on I2C bus
 * - 256KB NOR flash
 * - 64MB of RAM
 */

/*****************************************************************************
 * 256KB NOR Flash on BOOT Device
 ****************************************************************************/

static struct physmap_flash_data mss2_nor_flash_data = {
        .width          = 1,
};

static struct resource mss2_nor_flash_resource = {
        .flags          = IORESOURCE_MEM,
        .start          = MSS2_NOR_BOOT_BASE,
        .end            = MSS2_NOR_BOOT_BASE + MSS2_NOR_BOOT_SIZE - 1,
};

static struct platform_device mss2_nor_flash = {
        .name           = "physmap-flash",
        .id             = 0,
        .dev            = {
                .platform_data  = &mss2_nor_flash_data,
        },
        .resource       = &mss2_nor_flash_resource,
        .num_resources  = 1,
};

/****************************************************************************
 * PCI setup
 ****************************************************************************/
static int __init mss2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
        int irq;

        /*
         * Check for devices with hard-wired IRQs.
         */
        irq = orion5x_pci_map_irq(dev, slot, pin);
        if (irq != -1)
                return irq;

        return -1;
}

static struct hw_pci mss2_pci __initdata = {
        .nr_controllers = 2,
        .setup          = orion5x_pci_sys_setup,
        .scan           = orion5x_pci_sys_scan_bus,
        .map_irq        = mss2_pci_map_irq,
};

static int __init mss2_pci_init(void)
{
        if (machine_is_mss2())
                pci_common_init(&mss2_pci);

        return 0;
}
subsys_initcall(mss2_pci_init);


/*****************************************************************************
 * Ethernet
 ****************************************************************************/

static struct mv643xx_eth_platform_data mss2_eth_data = {
        .phy_addr       = MV643XX_ETH_PHY_ADDR(8),
};

/*****************************************************************************
 * SATA
 ****************************************************************************/

static struct mv_sata_platform_data mss2_sata_data = {
        .n_ports        = 2,
};

/*****************************************************************************
 * GPIO buttons
 ****************************************************************************/

#define MSS2_GPIO_KEY_RESET     12
#define MSS2_GPIO_KEY_POWER     11

static struct gpio_keys_button mss2_buttons[] = {
        {
                .code           = KEY_POWER,
                .gpio           = MSS2_GPIO_KEY_POWER,
                .desc           = "Power",
                .active_low     = 1,
        }, {
                .code           = KEY_RESTART,
                .gpio           = MSS2_GPIO_KEY_RESET,
                .desc           = "Reset",
                .active_low     = 1,
        },
};

static struct gpio_keys_platform_data mss2_button_data = {
        .buttons        = mss2_buttons,
        .nbuttons       = ARRAY_SIZE(mss2_buttons),
};

static struct platform_device mss2_button_device = {
        .name           = "gpio-keys",
        .id             = -1,
        .dev            = {
                .platform_data  = &mss2_button_data,
        },
};

/*****************************************************************************
 * RTC m41t81 on I2C bus
 ****************************************************************************/

#define MSS2_GPIO_RTC_IRQ       3

static struct i2c_board_info __initdata mss2_i2c_rtc = {
        I2C_BOARD_INFO("m41t81", 0x68),
};

/*****************************************************************************
 * MSS2 power off method
 ****************************************************************************/
/*
 * On the Maxtor Shared Storage II, the shutdown process is the following :
 * - Userland modifies U-boot env to tell U-boot to go idle at next boot
 * - The board reboots
 * - U-boot starts and go into an idle mode until the user press "power"
 */
static void mss2_power_off(void)
{
        u32 reg;

        /*
         * Enable and issue soft reset
         */
        reg = readl(RSTOUTn_MASK);
        reg |= 1 << 2;
        writel(reg, RSTOUTn_MASK);

        reg = readl(CPU_SOFT_RESET);
        reg |= 1;
        writel(reg, CPU_SOFT_RESET);
}

/****************************************************************************
 * General Setup
 ****************************************************************************/
static unsigned int mss2_mpp_modes[] __initdata = {
        MPP0_GPIO,              /* Power LED */
        MPP1_GPIO,              /* Error LED */
        MPP2_UNUSED,
        MPP3_GPIO,              /* RTC interrupt */
        MPP4_GPIO,              /* HDD ind. (Single/Dual)*/
        MPP5_GPIO,              /* HD0 5V control */
        MPP6_GPIO,              /* HD0 12V control */
        MPP7_GPIO,              /* HD1 5V control */
        MPP8_GPIO,              /* HD1 12V control */
        MPP9_UNUSED,
        MPP10_GPIO,             /* Fan control */
        MPP11_GPIO,             /* Power button */
        MPP12_GPIO,             /* Reset button */
        MPP13_UNUSED,
        MPP14_SATA_LED,         /* SATA 0 active */
        MPP15_SATA_LED,         /* SATA 1 active */
        MPP16_UNUSED,
        MPP17_UNUSED,
        MPP18_UNUSED,
        MPP19_UNUSED,
        0,
};

static void __init mss2_init(void)
{
        /* Setup basic Orion functions. Need to be called early. */
        orion5x_init();

        orion5x_mpp_conf(mss2_mpp_modes);

        /*
         * MPP[20] Unused
         * MPP[21] PCI clock
         * MPP[22] USB 0 over current
         * MPP[23] USB 1 over current
         */

        /*
         * Configure peripherals.
         */
        orion5x_ehci0_init();
        orion5x_ehci1_init();
        orion5x_eth_init(&mss2_eth_data);
        orion5x_i2c_init();
        orion5x_sata_init(&mss2_sata_data);
        orion5x_uart0_init();
        orion5x_xor_init();

        mvebu_mbus_add_window("devbus-boot", MSS2_NOR_BOOT_BASE,
                              MSS2_NOR_BOOT_SIZE);
        platform_device_register(&mss2_nor_flash);

        platform_device_register(&mss2_button_device);

        if (gpio_request(MSS2_GPIO_RTC_IRQ, "rtc") == 0) {
                if (gpio_direction_input(MSS2_GPIO_RTC_IRQ) == 0)
                        mss2_i2c_rtc.irq = gpio_to_irq(MSS2_GPIO_RTC_IRQ);
                else
                        gpio_free(MSS2_GPIO_RTC_IRQ);
        }
        i2c_register_board_info(0, &mss2_i2c_rtc, 1);

        /* register mss2 specific power-off method */
        pm_power_off = mss2_power_off;
}

MACHINE_START(MSS2, "Maxtor Shared Storage II")
        /* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> */
        .atag_offset    = 0x100,
        .init_machine   = mss2_init,
        .map_io         = orion5x_map_io,
        .init_early     = orion5x_init_early,
        .init_irq       = orion5x_init_irq,
        .init_time      = orion5x_timer_init,
        .fixup          = tag_fixup_mem32,
        .restart        = orion5x_restart,
MACHINE_END