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/*
 *  Zyxel NBG 460N/550N/550NH board support
 *
 *  Copyright (C) 2010 Michael Kurz <michi.kurz@googlemail.com>
 *
 *  based on mach-tl-wr1043nd.c
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License version 2 as published
 *  by the Free Software Foundation.
 */

#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/i2c-gpio.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/platform_device.h>
#include <linux/rtl8366.h>

#include <asm/mach-ath79/ath79.h>

#include "dev-eth.h"
#include "dev-gpio-buttons.h"
#include "dev-leds-gpio.h"
#include "dev-m25p80.h"
#include "dev-wmac.h"
#include "machtypes.h"

/* LEDs */
#define NBG460N_GPIO_LED_WPS            3
#define NBG460N_GPIO_LED_WAN            6
#define NBG460N_GPIO_LED_POWER          14
#define NBG460N_GPIO_LED_WLAN           15

/* Buttons */
#define NBG460N_GPIO_BTN_WPS            12
#define NBG460N_GPIO_BTN_RESET          21

#define NBG460N_KEYS_POLL_INTERVAL      20      /* msecs */
#define NBG460N_KEYS_DEBOUNCE_INTERVAL  (3 * NBG460N_KEYS_POLL_INTERVAL)

/* RTC chip PCF8563 I2C interface */
#define NBG460N_GPIO_PCF8563_SDA        8
#define NBG460N_GPIO_PCF8563_SCK        7

/* Switch configuration I2C interface */
#define NBG460N_GPIO_RTL8366_SDA        16
#define NBG460N_GPIO_RTL8366_SCK        18

static struct mtd_partition nbg460n_partitions[] = {
        {
                .name           = "Bootbase",
                .offset         = 0,
                .size           = 0x010000,
                .mask_flags     = MTD_WRITEABLE,
        }, {
                .name           = "U-Boot Config",
                .offset         = 0x010000,
                .size           = 0x030000,
        }, {
                .name           = "U-Boot",
                .offset         = 0x040000,
                .size           = 0x030000,
        }, {
                .name           = "linux",
                .offset         = 0x070000,
                .size           = 0x0e0000,
        }, {
                .name           = "rootfs",
                .offset         = 0x150000,
                .size           = 0x2a0000,
        }, {
                .name           = "CalibData",
                .offset         = 0x3f0000,
                .size           = 0x010000,
                .mask_flags     = MTD_WRITEABLE,
        }, {
                .name           = "firmware",
                .offset         = 0x070000,
                .size           = 0x380000,
        }
};

static struct flash_platform_data nbg460n_flash_data = {
        .parts          = nbg460n_partitions,
        .nr_parts       = ARRAY_SIZE(nbg460n_partitions),
};

static struct gpio_led nbg460n_leds_gpio[] __initdata = {
        {
                .name           = "nbg460n:green:power",
                .gpio           = NBG460N_GPIO_LED_POWER,
                .active_low     = 0,
                .default_trigger = "default-on",
        }, {
                .name           = "nbg460n:green:wps",
                .gpio           = NBG460N_GPIO_LED_WPS,
                .active_low     = 0,
        }, {
                .name           = "nbg460n:green:wlan",
                .gpio           = NBG460N_GPIO_LED_WLAN,
                .active_low     = 0,
        }, {
                /* Not really for controlling the LED,
                   when set low the LED blinks uncontrollable  */
                .name           = "nbg460n:green:wan",
                .gpio           = NBG460N_GPIO_LED_WAN,
                .active_low     = 0,
        }
};

static struct gpio_keys_button nbg460n_gpio_keys[] __initdata = {
        {
                .desc           = "reset",
                .type           = EV_KEY,
                .code           = KEY_RESTART,
                .debounce_interval = NBG460N_KEYS_DEBOUNCE_INTERVAL,
                .gpio           = NBG460N_GPIO_BTN_RESET,
                .active_low     = 1,
        }, {
                .desc           = "wps",
                .type           = EV_KEY,
                .code           = KEY_WPS_BUTTON,
                .debounce_interval = NBG460N_KEYS_DEBOUNCE_INTERVAL,
                .gpio           = NBG460N_GPIO_BTN_WPS,
                .active_low     = 1,
        }
};

static struct i2c_gpio_platform_data nbg460n_i2c_device_platdata = {
        .sda_pin        = NBG460N_GPIO_PCF8563_SDA,
        .scl_pin        = NBG460N_GPIO_PCF8563_SCK,
        .udelay         = 10,
};

static struct platform_device nbg460n_i2c_device = {
        .name           = "i2c-gpio",
        .id             = -1,
        .num_resources  = 0,
        .resource       = NULL,
        .dev            = {
                .platform_data  = &nbg460n_i2c_device_platdata,
        },
};

static struct i2c_board_info nbg460n_i2c_devs[] __initdata = {
        {
                I2C_BOARD_INFO("pcf8563", 0x51),
        },
};

static void nbg460n_i2c_init(void)
{
        /* The gpio interface */
        platform_device_register(&nbg460n_i2c_device);
        /* I2C devices */
        i2c_register_board_info(0, nbg460n_i2c_devs,
                                ARRAY_SIZE(nbg460n_i2c_devs));
}


static struct rtl8366_platform_data nbg460n_rtl8366s_data = {
        .gpio_sda       = NBG460N_GPIO_RTL8366_SDA,
        .gpio_sck       = NBG460N_GPIO_RTL8366_SCK,
};

static struct platform_device nbg460n_rtl8366s_device = {
        .name           = RTL8366S_DRIVER_NAME,
        .id             = -1,
        .dev = {
                .platform_data  = &nbg460n_rtl8366s_data,
        }
};

static void __init nbg460n_setup(void)
{
        /* end of bootloader sector contains mac address */
        u8 *mac = (u8 *) KSEG1ADDR(0x1fc0fff8);
        /* last sector contains wlan calib data */
        u8 *eeprom = (u8 *) KSEG1ADDR(0x1fff1000);

        /* LAN Port */
        ath79_init_mac(ath79_eth0_data.mac_addr, mac, 0);
        ath79_eth0_data.mii_bus_dev = &nbg460n_rtl8366s_device.dev;
        ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
        ath79_eth0_data.speed = SPEED_1000;
        ath79_eth0_data.duplex = DUPLEX_FULL;

        /* WAN Port */
        ath79_init_mac(ath79_eth1_data.mac_addr, mac, 1);
        ath79_eth1_data.mii_bus_dev = &nbg460n_rtl8366s_device.dev;
        ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
        ath79_eth1_data.phy_mask = 0x10;

        ath79_register_eth(0);
        ath79_register_eth(1);

        /* register the switch phy */
        platform_device_register(&nbg460n_rtl8366s_device);

        /* register flash */
        ath79_register_m25p80(&nbg460n_flash_data);

        ath79_register_wmac(eeprom, mac);

        /* register RTC chip */
        nbg460n_i2c_init();

        ath79_register_leds_gpio(-1, ARRAY_SIZE(nbg460n_leds_gpio),
                                 nbg460n_leds_gpio);

        ath79_register_gpio_keys_polled(-1, NBG460N_KEYS_POLL_INTERVAL,
                                        ARRAY_SIZE(nbg460n_gpio_keys),
                                        nbg460n_gpio_keys);
}

MIPS_MACHINE(ATH79_MACH_NBG460N, "NBG460N", "Zyxel NBG460N/550N/550NH",
             nbg460n_setup);