/*
 * Atheros DB120 reference board with TB388 extension support
 *
 * Copyright (c) 2012 The Linux Foundation. All rights reserved.
 *
 * 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.
 * All rights reserved.
 */

#include <linux/pci.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include <linux/ath9k_platform.h>
#include <linux/ar8216_platform.h>
#include <linux/delay.h>
#include <linux/gpio.h>

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

#include "common.h"
#include "dev-ap9x-pci.h"
#include "dev-audio.h"
#include "dev-eth.h"
#include "dev-gpio-buttons.h"
#include "dev-leds-gpio.h"
#include "dev-m25p80.h"
#include "dev-spi.h"
#include "dev-usb.h"
#include "dev-wmac.h"
#include "machtypes.h"

#define DB120_GPIO_I2S_MCLK		4
#define DB120_GPIO_I2S_SD		11
#define DB120_GPIO_I2S_WS		12
#define DB120_GPIO_I2S_CLK		13
#define DB120_GPIO_I2S_MIC_SD		14
#define DB120_GPIO_SPDIF_OUT		15

#define DB120_GPIO_BTN_WPS		16

#define DB120_KEYS_POLL_INTERVAL	20	/* msecs */
#define DB120_KEYS_DEBOUNCE_INTERVAL	(3 * DB120_KEYS_POLL_INTERVAL)

#define DB120_MAC0_OFFSET		0
#define DB120_MAC1_OFFSET		6
#define DB120_WMAC_CALDATA_OFFSET	0x1000
#define DB120_PCIE_CALDATA_OFFSET	0x5000

static struct gpio_keys_button db120_tb388_gpio_keys[] __initdata = {
	{
		.desc		= "WPS button",
		.type		= EV_KEY,
		.code		= KEY_WPS_BUTTON,
		.debounce_interval = DB120_KEYS_DEBOUNCE_INTERVAL,
		.gpio		= DB120_GPIO_BTN_WPS,
		.active_low	= 1,
	},
};

static struct ar8327_pad_cfg db120_tb388_ar8327_pad0_cfg = {
	.mode = AR8327_PAD_MAC_RGMII,
	.txclk_delay_en = true,
	.rxclk_delay_en = true,
	.txclk_delay_sel = AR8327_CLK_DELAY_SEL1,
	.rxclk_delay_sel = AR8327_CLK_DELAY_SEL2,
};

static struct ar8327_platform_data db120_tb388_ar8327_data = {
	.pad0_cfg = &db120_tb388_ar8327_pad0_cfg,
	.cpuport_cfg = {
		.force_link = 1,
		.speed = AR8327_PORT_SPEED_1000,
		.duplex = 1,
		.txpause = 1,
		.rxpause = 1,
	}
};

static struct mdio_board_info db120_tb388_mdio0_info[] = {
	{
		.bus_id = "ag71xx-mdio.0",
		.phy_addr = 0,
		.platform_data = &db120_tb388_ar8327_data,
	},
};

static struct platform_device db120_tb388_spdif_codec = {
	.name		= "ath79-internal-codec",
	.id		= -1,
};

static void __init db120_tb388_gmac_setup(void)
{
	void __iomem *base;
	u32 t;

	base = ioremap(AR934X_GMAC_BASE, AR934X_GMAC_SIZE);

	t = __raw_readl(base + AR934X_GMAC_REG_ETH_CFG);
	t &= ~(AR934X_ETH_CFG_RGMII_GMAC0 | AR934X_ETH_CFG_MII_GMAC0 |
	       AR934X_ETH_CFG_GMII_GMAC0 | AR934X_ETH_CFG_SW_ONLY_MODE);
	t |= AR934X_ETH_CFG_RGMII_GMAC0 | AR934X_ETH_CFG_SW_ONLY_MODE;

	__raw_writel(t, base + AR934X_GMAC_REG_ETH_CFG);

	iounmap(base);
}

static void __init db120_tb388_audio_setup(void)
{
	u32 t;

	/* Reset I2S internal controller */
	t = ath79_reset_rr(AR71XX_RESET_REG_RESET_MODULE);
	ath79_reset_wr(AR71XX_RESET_REG_RESET_MODULE, t | AR934X_RESET_I2S );
	udelay(1);

	/* GPIO configuration
	   GPIOs 4,11,12,13 are configured as I2S signal - Output
	   GPIO 15 is SPDIF - Output
	   GPIO 14 is MIC - Input
	   Please note that the value in direction_output doesn't really matter
	   here as GPIOs are configured to relay internal data signal
	*/
	gpio_request(DB120_GPIO_I2S_CLK, "I2S CLK");
	ath79_gpio_output_select(DB120_GPIO_I2S_CLK, AR934X_GPIO_OUT_MUX_I2S_CLK);
	gpio_direction_output(DB120_GPIO_I2S_CLK, 0);

	gpio_request(DB120_GPIO_I2S_WS, "I2S WS");
	ath79_gpio_output_select(DB120_GPIO_I2S_WS, AR934X_GPIO_OUT_MUX_I2S_WS);
	gpio_direction_output(DB120_GPIO_I2S_WS, 0);

	gpio_request(DB120_GPIO_I2S_SD, "I2S SD");
	ath79_gpio_output_select(DB120_GPIO_I2S_SD, AR934X_GPIO_OUT_MUX_I2S_SD);
	gpio_direction_output(DB120_GPIO_I2S_SD, 0);

	gpio_request(DB120_GPIO_I2S_MCLK, "I2S MCLK");
	ath79_gpio_output_select(DB120_GPIO_I2S_MCLK, AR934X_GPIO_OUT_MUX_I2S_MCK);
	gpio_direction_output(DB120_GPIO_I2S_MCLK, 0);

	gpio_request(DB120_GPIO_SPDIF_OUT, "SPDIF OUT");
	ath79_gpio_output_select(DB120_GPIO_SPDIF_OUT, AR934X_GPIO_OUT_MUX_SPDIF_OUT);
	gpio_direction_output(DB120_GPIO_SPDIF_OUT, 0);

	gpio_request(DB120_GPIO_I2S_MIC_SD, "I2S MIC_SD");
	ath79_gpio_input_select(DB120_GPIO_I2S_MIC_SD, AR934X_GPIO_IN_MUX_I2S_MIC_SD);
	gpio_direction_input(DB120_GPIO_I2S_MIC_SD);

	/* Init stereo block registers in default configuration */
	ath79_audio_setup();
}

static void __init db120_tb388_setup(void)
{
	u8 *art = (u8 *) KSEG1ADDR(0x1fff0000);

	ath79_register_m25p80(NULL);

	ath79_register_gpio_keys_polled(-1, DB120_KEYS_POLL_INTERVAL,
					ARRAY_SIZE(db120_tb388_gpio_keys),
					db120_tb388_gpio_keys);
	ath79_register_usb();
	ath79_register_wmac(art + DB120_WMAC_CALDATA_OFFSET, NULL);
	ap91_pci_init(art + DB120_PCIE_CALDATA_OFFSET, NULL);

	db120_tb388_gmac_setup();

	ath79_register_mdio(1, 0x0);
	ath79_register_mdio(0, 0x0);

	ath79_init_mac(ath79_eth0_data.mac_addr, art + DB120_MAC0_OFFSET, 0);

	mdiobus_register_board_info(db120_tb388_mdio0_info,
				    ARRAY_SIZE(db120_tb388_mdio0_info));

	/* GMAC0 is connected to an AR8327 switch */
	ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
	ath79_eth0_data.phy_mask = BIT(0);
	ath79_eth0_data.mii_bus_dev = &ath79_mdio0_device.dev;
	ath79_eth0_pll_data.pll_1000 = 0x06000000;
	ath79_register_eth(0);

	/* GMAC1 is connected to the internal switch */
	ath79_init_mac(ath79_eth1_data.mac_addr, art + DB120_MAC1_OFFSET, 0);
	ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_GMII;
	ath79_eth1_data.speed = SPEED_1000;
	ath79_eth1_data.duplex = DUPLEX_FULL;

	ath79_register_eth(1);

	/* Audio initialization: PCM/I2S and CODEC */
	db120_tb388_audio_setup();
	platform_device_register(&db120_tb388_spdif_codec);
	ath79_audio_device_register();
}

MIPS_MACHINE(ATH79_MACH_DB120_TB388, "DB120TB388",
	     "Atheros DB120 reference board with TB388 extension",
	     db120_tb388_setup);