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/*
 * ALFA Network R36A board support
 *
 * Copyright (C) 2018 Piotr Dymacz <pepe2k@gmail.com>
 *
 * 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/gpio.h>
#include <linux/platform_device.h>

#include <asm/mach-ath79/ath79.h>
#include <asm/mach-ath79/ar71xx_regs.h>

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

#define R36A_GPIO_LED_LAN       4
#define R36A_GPIO_LED_STATUS    14
#define R36A_GPIO_LED_USB       12
#define R36A_GPIO_LED_WAN       16
#define R36A_GPIO_LED_WLAN      15

#define R36A_GPIO_WDT_EN        1
#define R36A_GPIO_WDT_IN        0
#define R36A_GPIO_USB_PWR       3

#define R36A_GPIO_BTN_RESET     2
#define R36A_GPIO_BTN_RFKILL    17

#define R36A_KEYS_POLL_INTERVAL         20
#define R36A_KEYS_DEBOUNCE_INTERVAL     (3 * R36A_KEYS_POLL_INTERVAL)

#define R36A_WMAC_CALDATA_OFFSET        0x1000

static struct gpio_led r36a_leds_gpio[] __initdata = {
        {
                .name           = "r36a:blue:lan",
                .gpio           = R36A_GPIO_LED_LAN,
                .active_low     = 1,
        }, {
                .name           = "r36a:blue:status",
                .gpio           = R36A_GPIO_LED_STATUS,
                .active_low     = 1,
        }, {
                .name           = "r36a:blue:usb",
                .gpio           = R36A_GPIO_LED_USB,
                .active_low     = 1,
        }, {
                .name           = "r36a:blue:wan",
                .gpio           = R36A_GPIO_LED_WAN,
                .active_low     = 1,
        }, {
                .name           = "r36a:blue:wlan",
                .gpio           = R36A_GPIO_LED_WLAN,
                .active_low     = 1,
        },
};

static struct gpio_keys_button r36a_gpio_keys[] __initdata = {
        {
                .desc                   = "reset",
                .type                   = EV_KEY,
                .code                   = KEY_RESTART,
                .debounce_interval      = R36A_KEYS_DEBOUNCE_INTERVAL,
                .gpio                   = R36A_GPIO_BTN_RESET,
                .active_low             = 1,
        }, {
                .desc                   = "rfkill",
                .type                   = EV_KEY,
                .code                   = KEY_RFKILL,
                .debounce_interval      = R36A_KEYS_DEBOUNCE_INTERVAL,
                .gpio                   = R36A_GPIO_BTN_RFKILL,
                .active_low             = 1,
        },
};

static void __init r36a_setup(void)
{
        u8 *art = (u8 *) KSEG1ADDR(0x1f070000);

        ath79_register_m25p80(NULL);

        ath79_setup_ar933x_phy4_switch(false, false);

        ath79_register_mdio(0, 0x0);

        ath79_switch_data.phy4_mii_en = 1;
        ath79_switch_data.phy_poll_mask = 0xf7;

        /* LAN */
        ath79_eth0_data.duplex = DUPLEX_FULL;
        ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_MII;
        ath79_eth0_data.phy_mask = BIT(4);
        ath79_eth0_data.speed = SPEED_100;
        ath79_init_mac(ath79_eth0_data.mac_addr, art, 0);
        ath79_register_eth(0);

        /* WAN */
        ath79_eth1_data.duplex = DUPLEX_FULL;
        ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_GMII;
        ath79_init_mac(ath79_eth1_data.mac_addr, art, 1);
        ath79_register_eth(1);

        /* Disable JTAG (enables GPIO0-3) */
        ath79_gpio_function_enable(AR934X_GPIO_FUNC_JTAG_DISABLE);

        ath79_register_leds_gpio(-1, ARRAY_SIZE(r36a_leds_gpio),
                                 r36a_leds_gpio);

        ath79_register_gpio_keys_polled(-1, R36A_KEYS_POLL_INTERVAL,
                                        ARRAY_SIZE(r36a_gpio_keys),
                                        r36a_gpio_keys);

        gpio_request_one(R36A_GPIO_WDT_IN,
                         GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED,
                         "WDT input");

        gpio_request_one(R36A_GPIO_WDT_EN,
                         GPIOF_OUT_INIT_LOW | GPIOF_EXPORT_DIR_FIXED,
                         "WDT enable");

        gpio_request_one(R36A_GPIO_USB_PWR,
                         GPIOF_OUT_INIT_HIGH | GPIOF_EXPORT_DIR_FIXED,
                         "USB power");

        ath79_register_wmac(art + R36A_WMAC_CALDATA_OFFSET, NULL);

        ath79_register_usb();
}

MIPS_MACHINE(ATH79_MACH_R36A, "R36A", "ALFA Network R36A", r36a_setup);