/*
 * Copyright (C) 2013 LG Electironics, Inc.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 *
 */


#define MAX_NUM_OF_BUTTON 4   
#define MAX_NUM_OF_FINGER 5
#define DESCRIPTION_TABLE_START	0xE9
#define PAGE_SELECT_REG 0xFF
#define PAGE_MAX_NUM 4

#define REG_X_POSITION					0
#define REG_Y_POSITION					1
#define REG_YX_POSITION					2
#define REG_WY_WX						3
#define REG_Z							4
#define NUM_OF_EACH_FINGER_DATA_REG		5

/* Define for Area based key button */
#define BUTTON_MARGIN					50
#define TOUCH_BUTTON_PRESSED			2

/* Debug Mask setting */
#define SYNAPTICS_RMI4_I2C_DEBUG_PRINT (1)
#define SYNAPTICS_RMI4_I2C_ERROR_PRINT (1)
#define SYNAPTICS_RMI4_I2C_INFO_PRINT (1)

#if defined(SYNAPTICS_RMI4_I2C_INFO_PRINT)
#define SYNAPTICS_INFO_MSG(fmt, args...) printk(KERN_ERR "[Touch] " fmt, ##args);
#else
#define SYNAPTICS_INFO_MSG(fmt, args...) {};
#endif

#if defined(SYNAPTICS_RMI4_I2C_DEBUG_PRINT)
#define SYNAPTICS_DEBUG_MSG(fmt, args...) printk(KERN_ERR "[Touch D] [%s %d] " fmt, __func__, __LINE__, ##args);
#else
#define SYNAPTICS_DEBUG_MSG(fmt, args...) {};
#endif

#if defined(SYNAPTICS_RMI4_I2C_ERROR_PRINT)
#define SYNAPTICS_ERR_MSG(fmt, args...) printk(KERN_ERR "[Touch E] [%s %d] " fmt, __func__, __LINE__, ##args);
#else
#define SYNAPTICS_ERR_MSG(fmt, args...) {};
#endif


enum {
	SYNAPTICS_RMI4_I2C_DEBUG_NONE				= 0,
	SYNAPTICS_RMI4_I2C_DEBUG_FUNC_TRACE			= 1U << 0,	/* 1 */
	SYNAPTICS_RMI4_I2C_DEBUG_INT_STATUS			= 1U << 1,	/* 2 */
	SYNAPTICS_RMI4_I2C_DEBUG_FINGER_STATUS		= 1U << 2,	/* 4 */
	SYNAPTICS_RMI4_I2C_DEBUG_FINGER_POSITION	= 1U << 3,	/* 8 */
	SYNAPTICS_RMI4_I2C_DEBUG_FINGER_REG			= 1U << 4,	/* 16 */
	SYNAPTICS_RMI4_I2C_DEBUG_BUTTON_STATUS		= 1U << 5,	/* 32 */
	SYNAPTICS_RMI4_I2C_DEBUG_BUTTON_REG			= 1U << 6,	/* 64 */
	SYNAPTICS_RMI4_I2C_DEBUG_INT_INTERVAL		= 1U << 7,	/* 128 */
	SYNAPTICS_RMI4_I2C_DEBUG_INT_ISR_DELAY		= 1U << 8,	/* 256 */
	SYNAPTICS_RMI4_I2C_DEBUG_FINGER_HANDLE_TIME	= 1U << 9,	/* 512 */
	SYNAPTICS_RMI4_I2C_DEBUG_BUTTON_HANDLE_TIME	= 1U << 10,	/* 1024 */
	SYNAPTICS_RMI4_I2C_DEBUG_UPGRADE_DELAY		= 1U << 11,	/* 2048 */
};

enum {
	IC_CTRL_CODE_NONE = 0,
	IC_CTRL_BASELINE,
	IC_CTRL_READ,
	IC_CTRL_WRITE,
	IC_CTRL_RESET_CMD,
	IC_CTRL_REPORT_MODE,
};

enum {
	BASELINE_OPEN = 0,
	BASELINE_FIX,
	BASELINE_REBASE,
};

enum {
	TIME_EX_INIT_TIME,
	TIME_EX_FIRST_INT_TIME,
	TIME_EX_PREV_PRESS_TIME,
	TIME_EX_CURR_PRESS_TIME,
	TIME_EX_BUTTON_PRESS_START_TIME,
	TIME_EX_BUTTON_PRESS_END_TIME,
	TIME_EX_FIRST_GHOST_DETECT_TIME,
	TIME_EX_SECOND_GHOST_DETECT_TIME,
	TIME_EX_CURR_INT_TIME,
	TIME_EX_PROFILE_MAX
};

enum{
	IGNORE_INTERRUPT = 100,
	NEED_TO_OUT,
	NEED_TO_INIT,
};


struct synaptics_ts_platform_data {
	bool use_irq;
	unsigned long irqflags;
	unsigned short irq_num;
	unsigned short int_gpio;
	unsigned short reset_gpio;
	int (*power)(int on);
	unsigned short ic_booting_delay; /* ms */
	unsigned long report_period; /* ns */
	unsigned char num_of_finger;
	unsigned char num_of_button;
	unsigned short button[MAX_NUM_OF_BUTTON];
	int x_max;
	int y_max;
	unsigned char fw_ver;
	unsigned int palm_threshold;
	unsigned int delta_pos_threshold;
	int use_ghost_detection;
	int report_mode;
};

typedef struct {
	u8 query_base;
	u8 command_base;
	u8 control_base;
	u8 data_base;
	u8 int_source_count;
	u8 id;
} ts_function_descriptor;

typedef struct {
	unsigned int pos_x[MAX_NUM_OF_FINGER];
	unsigned int pos_y[MAX_NUM_OF_FINGER];
	unsigned char pressure[MAX_NUM_OF_FINGER];
	int total_num;
	char palm;
} ts_finger_data;

struct synaptics_ts_timestamp {
	u64 start;
	u64 end;
	u64 result_t;
	unsigned long rem;
	atomic_t ready;
};

/* Device data structure */
struct synaptics_ts_data {
	struct i2c_client *client;
	struct input_dev *input_dev;
	struct synaptics_ts_platform_data *pdata;
	bool is_downloading;		/* avoid power off during F/W upgrade */
	bool is_suspended;			/* avoid power off during F/W upgrade */
	unsigned int button_width;
	char button_prestate[MAX_NUM_OF_BUTTON];
	char finger_prestate[MAX_NUM_OF_FINGER];
	bool ic_init;
	bool is_probed;
	atomic_t interrupt_handled;
	ts_function_descriptor common_dsc;
	ts_function_descriptor finger_dsc;
	ts_function_descriptor button_dsc;
	ts_function_descriptor analog_dsc;
	ts_function_descriptor flash_dsc;
	u8 common_page;
	u8 finger_page;
	u8 button_page;
	u8 analog_page;
	u8 flash_page;
	unsigned char int_status_reg_asb0_bit;
	unsigned char int_status_reg_button_bit;
	unsigned char curr_int_mask;
	struct hrtimer timer;
	struct delayed_work work;
	struct delayed_work button_lock_work;
	struct synaptics_ts_timestamp int_delay;
	ts_finger_data pre_ts_data;
	char fw_rev;
	char manufcturer_id;
	char config_id[5];
	char product_id[11];
	char fw_path[256];
	unsigned char *fw_start;
	unsigned long fw_size;
	char fw_config_id[5];
	char fw_product_id[11];
	bool fw_force_upgrade;
};

typedef struct {
	unsigned char device_status_reg;
	unsigned char interrupt_status_reg;
	unsigned char button_data_reg;
} ts_sensor_ctrl;

typedef struct {
	unsigned char finger_state_reg[2];
	unsigned char finger_data[MAX_NUM_OF_FINGER][NUM_OF_EACH_FINGER_DATA_REG];
} ts_sensor_data;