/*
 * SAMSUNG NFC Controller
 *
 * Copyright (C) 2013 Samsung Electronics Co.Ltd
 * Author: Woonki Lee <woonki84.lee@samsung.com>
 * Author: Heejae Kim <heejae12.kim@samsung.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.
 *
 * Last update: 2016-01-14
 */

#include <linux/platform_device.h>
#ifdef CONFIG_SEC_NFC_GPIO_CLK
#include <linux/clk.h>
#endif
#ifdef CONFIG_SEC_NFC_PMIC_LDO
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#endif

#ifdef CONFIG_SEC_NFC_I2C /* support old driver configuration */

#ifndef CONFIG_SEC_NFC
#define CONFIG_SEC_NFC
#endif

#if !defined(CONFIG_SEC_NFC_IF_I2C) && !defined(CONFIG_SEC_NFC_IF_UART)
#define CONFIG_SEC_NFC_IF_I2C
#endif

#if !defined(CONFIG_SEC_NFC_PRODUCT_N3) && !defined(CONFIG_SEC_NFC_PRODUCT_N5)
#define CONFIG_SEC_NFC_PRODUCT_N3
#endif

#endif /* CONFIG_SEC_NFC_I2C */

#define SEC_NFC_DRIVER_NAME		"sec-nfc"

#define SEC_NFC_MAX_BUFFER_SIZE	512

/* ioctl */
#define SEC_NFC_MAGIC			'S'
#define SEC_NFC_GET_MODE		_IOW(SEC_NFC_MAGIC, 0, unsigned int)
#define SEC_NFC_SET_MODE		_IOW(SEC_NFC_MAGIC, 1, unsigned int)
#define SEC_NFC_SLEEP			_IOW(SEC_NFC_MAGIC, 2, unsigned int)
#define SEC_NFC_WAKEUP			_IOW(SEC_NFC_MAGIC, 3, unsigned int)
#ifdef CONFIG_SEC_ESE_COLDRESET
#define SEC_NFC_COLD_RESET		_IOW(SEC_NFC_MAGIC, 5, unsigned int)
#define SEC_NFC_SHUTDOWN		_IOW(SEC_NFC_MAGIC, 6, unsigned int)
#endif

/* size */
#define SEC_NFC_MSG_MAX_SIZE	(256 + 4)

/* wait for device stable */
#ifdef CONFIG_SEC_NFC_MARGINTIME
#define SEC_NFC_VEN_WAIT_TIME	(150)
#else
#define SEC_NFC_VEN_WAIT_TIME	(20)
#endif

/* gpio pin configuration */
struct sec_nfc_platform_data {
	int irq;
	int ven;
	int firm;
	int wake;
	int pvdd_en;
	unsigned int tvdd;
	unsigned int avdd;
#ifdef CONFIG_SEC_ESE_COLDRESET
	unsigned int coldreset;
#endif
#ifdef CONFIG_SEC_NFC_GPIO_CLK
	unsigned int clk_req;
	struct clk *clk;
#endif

	void (*cfg_gpio)(void);
	u32 ven_gpio_flags;
	u32 firm_gpio_flags;
	u32 irq_gpio_flags;
	const char *nfc_pvdd;
#ifdef CONFIG_SEC_NFC_PMIC_LDO
	const char *pvdd_regulator_name;
	struct regulator *pvdd_regulator;
#endif
#ifdef CONFIG_SEC_NFC_DEDICATED_CLK
	phys_addr_t clkctrl_addr;
#endif
};

enum sec_nfc_mode {
	SEC_NFC_MODE_OFF = 0,
	SEC_NFC_MODE_FIRMWARE,
	SEC_NFC_MODE_BOOTLOADER,
	SEC_NFC_MODE_COUNT,
};

#ifdef CONFIG_SEC_NFC_PRODUCT_N3
enum sec_nfc_power {
	SEC_NFC_PW_OFF = 0,
	SEC_NFC_PW_ON,
};
#else /* CONFIG_SEC_NFC_PRODUCT_N3 */
enum sec_nfc_power {
	SEC_NFC_PW_ON = 0,
	SEC_NFC_PW_OFF,
};
#endif

enum sec_nfc_firmpin {
	SEC_NFC_FW_OFF = 0,
	SEC_NFC_FW_ON,
};

enum sec_nfc_wake {
	SEC_NFC_WAKE_SLEEP = 0,
	SEC_NFC_WAKE_UP,
};

#ifdef CONFIG_SEC_ESE_COLDRESET
enum sec_nfc_coldreset{
	SEC_NFC_COLDRESET_OFF = 0,
	SEC_NFC_COLDRESET_ON,
};

#define FIRMWARE_GUARD_TIME (4)
#define DEVICEHOST_ID (0x00)
#define ESE_ID (0x02)
#define IDX_SLEEP_WAKEUP_NFC 0
#define IDX_SLEEP_WAKEUP_ESE 1
#endif

bool is_charging_mode;

#define NFC_I2C_LDO_ON		1
#define NFC_I2C_LDO_OFF		0