/*
 * Copyright (C) 2011-2012
 * Lauri Hintsala, Bluegiga, <lauri.hintsala@bluegiga.com>
 * Veli-Pekka Peltola, Bluegiga, <veli-pekka.peltola@bluegiga.com>
 *
 * based on: mach-mx28evk.c
 * Copyright 2010 Freescale Semiconductor, Inc. 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 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.
 */

#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
#include <linux/micrel_phy.h>

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

#include <mach/common.h>
#include <mach/digctl.h>
#include <mach/iomux-mx28.h>

#include "devices-mx28.h"

#define APX4DEVKIT_GPIO_USERLED	MXS_GPIO_NR(3, 28)

static const iomux_cfg_t apx4devkit_pads[] __initconst = {
	/* duart */
	MX28_PAD_PWM0__DUART_RX | MXS_PAD_CTRL,
	MX28_PAD_PWM1__DUART_TX | MXS_PAD_CTRL,

	/* auart0 */
	MX28_PAD_AUART0_RX__AUART0_RX | MXS_PAD_CTRL,
	MX28_PAD_AUART0_TX__AUART0_TX | MXS_PAD_CTRL,
	MX28_PAD_AUART0_CTS__AUART0_CTS | MXS_PAD_CTRL,
	MX28_PAD_AUART0_RTS__AUART0_RTS | MXS_PAD_CTRL,

	/* auart1 */
	MX28_PAD_AUART1_RX__AUART1_RX | MXS_PAD_CTRL,
	MX28_PAD_AUART1_TX__AUART1_TX | MXS_PAD_CTRL,

	/* auart2 */
	MX28_PAD_SSP2_SCK__AUART2_RX | MXS_PAD_CTRL,
	MX28_PAD_SSP2_MOSI__AUART2_TX | MXS_PAD_CTRL,

	/* auart3 */
	MX28_PAD_SSP2_MISO__AUART3_RX | MXS_PAD_CTRL,
	MX28_PAD_SSP2_SS0__AUART3_TX | MXS_PAD_CTRL,

#define MXS_PAD_FEC	(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP)
	/* fec0 */
	MX28_PAD_ENET0_MDC__ENET0_MDC | MXS_PAD_FEC,
	MX28_PAD_ENET0_MDIO__ENET0_MDIO | MXS_PAD_FEC,
	MX28_PAD_ENET0_RX_EN__ENET0_RX_EN | MXS_PAD_FEC,
	MX28_PAD_ENET0_RXD0__ENET0_RXD0 | MXS_PAD_FEC,
	MX28_PAD_ENET0_RXD1__ENET0_RXD1 | MXS_PAD_FEC,
	MX28_PAD_ENET0_TX_EN__ENET0_TX_EN | MXS_PAD_FEC,
	MX28_PAD_ENET0_TXD0__ENET0_TXD0 | MXS_PAD_FEC,
	MX28_PAD_ENET0_TXD1__ENET0_TXD1 | MXS_PAD_FEC,
	MX28_PAD_ENET_CLK__CLKCTRL_ENET | MXS_PAD_FEC,

	/* i2c */
	MX28_PAD_I2C0_SCL__I2C0_SCL,
	MX28_PAD_I2C0_SDA__I2C0_SDA,

	/* mmc0 */
	MX28_PAD_SSP0_DATA0__SSP0_D0 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA1__SSP0_D1 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA2__SSP0_D2 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA3__SSP0_D3 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA4__SSP0_D4 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA5__SSP0_D5 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA6__SSP0_D6 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA7__SSP0_D7 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_CMD__SSP0_CMD |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DETECT__SSP0_CARD_DETECT |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
	MX28_PAD_SSP0_SCK__SSP0_SCK |
		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),

	/* led */
	MX28_PAD_PWM3__GPIO_3_28 | MXS_PAD_CTRL,

	/* saif0 & saif1 */
	MX28_PAD_SAIF0_MCLK__SAIF0_MCLK |
		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SAIF0_LRCLK__SAIF0_LRCLK |
		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SAIF0_BITCLK__SAIF0_BITCLK |
		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SAIF0_SDATA0__SAIF0_SDATA0 |
		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SAIF1_SDATA0__SAIF1_SDATA0 |
		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
};

/* led */
static const struct gpio_led apx4devkit_leds[] __initconst = {
	{
		.name = "user-led",
		.default_trigger = "heartbeat",
		.gpio = APX4DEVKIT_GPIO_USERLED,
	},
};

static const struct gpio_led_platform_data apx4devkit_led_data __initconst = {
	.leds = apx4devkit_leds,
	.num_leds = ARRAY_SIZE(apx4devkit_leds),
};

static const struct fec_platform_data mx28_fec_pdata __initconst = {
	.phy = PHY_INTERFACE_MODE_RMII,
};

static const struct mxs_mmc_platform_data apx4devkit_mmc_pdata __initconst = {
	.wp_gpio = -EINVAL,
	.flags = SLOTF_4_BIT_CAPABLE,
};

static const struct i2c_board_info apx4devkit_i2c_boardinfo[] __initconst = {
	{ I2C_BOARD_INFO("sgtl5000", 0x0a) }, /* ASoC */
	{ I2C_BOARD_INFO("pcf8563", 0x51) }, /* RTC */
};

#if defined(CONFIG_REGULATOR_FIXED_VOLTAGE) || \
		defined(CONFIG_REGULATOR_FIXED_VOLTAGE_MODULE)
static struct regulator_consumer_supply apx4devkit_audio_consumer_supplies[] = {
	REGULATOR_SUPPLY("VDDA", "0-000a"),
	REGULATOR_SUPPLY("VDDIO", "0-000a"),
};

static struct regulator_init_data apx4devkit_vdd_reg_init_data = {
	.constraints	= {
		.name	= "3V3",
		.always_on = 1,
	},
	.consumer_supplies = apx4devkit_audio_consumer_supplies,
	.num_consumer_supplies = ARRAY_SIZE(apx4devkit_audio_consumer_supplies),
};

static struct fixed_voltage_config apx4devkit_vdd_pdata = {
	.supply_name	= "board-3V3",
	.microvolts	= 3300000,
	.gpio		= -EINVAL,
	.enabled_at_boot = 1,
	.init_data	= &apx4devkit_vdd_reg_init_data,
};

static struct platform_device apx4devkit_voltage_regulator = {
	.name		= "reg-fixed-voltage",
	.id		= -1,
	.num_resources	= 0,
	.dev		= {
		.platform_data	= &apx4devkit_vdd_pdata,
	},
};

static void __init apx4devkit_add_regulators(void)
{
	platform_device_register(&apx4devkit_voltage_regulator);
}
#else
static void __init apx4devkit_add_regulators(void) {}
#endif

static const struct mxs_saif_platform_data
			apx4devkit_mxs_saif_pdata[] __initconst = {
	/* working on EXTMSTR0 mode (saif0 master, saif1 slave) */
	{
		.master_mode = 1,
		.master_id = 0,
	}, {
		.master_mode = 0,
		.master_id = 0,
	},
};

static int apx4devkit_phy_fixup(struct phy_device *phy)
{
	phy->dev_flags |= MICREL_PHY_50MHZ_CLK;
	return 0;
}

static void __init apx4devkit_fec_phy_clk_enable(void)
{
	struct clk *clk;

	/* Enable fec phy clock */
	clk = clk_get_sys("enet_out", NULL);
	if (!IS_ERR(clk))
		clk_prepare_enable(clk);
}

static void __init apx4devkit_init(void)
{
	mx28_soc_init();

	mxs_iomux_setup_multiple_pads(apx4devkit_pads,
			ARRAY_SIZE(apx4devkit_pads));

	mx28_add_duart();
	mx28_add_auart0();
	mx28_add_auart1();
	mx28_add_auart2();
	mx28_add_auart3();

	/*
	 * Register fixup for the Micrel KS8031 PHY clock
	 * (shares same ID with KS8051)
	 */
	phy_register_fixup_for_uid(PHY_ID_KS8051, MICREL_PHY_ID_MASK,
			apx4devkit_phy_fixup);

	apx4devkit_fec_phy_clk_enable();
	mx28_add_fec(0, &mx28_fec_pdata);

	mx28_add_mxs_mmc(0, &apx4devkit_mmc_pdata);

	gpio_led_register_device(0, &apx4devkit_led_data);

	mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
	mx28_add_saif(0, &apx4devkit_mxs_saif_pdata[0]);
	mx28_add_saif(1, &apx4devkit_mxs_saif_pdata[1]);

	apx4devkit_add_regulators();

	mx28_add_mxs_i2c(0);
	i2c_register_board_info(0, apx4devkit_i2c_boardinfo,
			ARRAY_SIZE(apx4devkit_i2c_boardinfo));

	mxs_add_platform_device("mxs-sgtl5000", 0, NULL, 0, NULL, 0);
}

static void __init apx4devkit_timer_init(void)
{
	mx28_clocks_init();
}

static struct sys_timer apx4devkit_timer = {
	.init	= apx4devkit_timer_init,
};

MACHINE_START(APX4DEVKIT, "Bluegiga APX4 Development Kit")
	.map_io		= mx28_map_io,
	.init_irq	= mx28_init_irq,
	.timer		= &apx4devkit_timer,
	.init_machine	= apx4devkit_init,
	.restart	= mxs_restart,
MACHINE_END