/*
 * SiI8620 Linux Driver
 *
 * Copyright (C) 2013-2014 Silicon Image, Inc.
 *
 * 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 version 2.
 * This program is distributed AS-IS WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; INCLUDING without the implied warranty
 * of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE or NON-INFRINGEMENT.
 * See the GNU General Public License for more details at
 * http://www.gnu.org/licenses/gpl-2.0.html.
 */

#ifndef _SI_MDT_INPUTDEV_H_
#define _SI_MDT_INPUTDEV_H_

#define HID_INPUT_REPORT_CNT	7
#define MAX_TOUCH_CONTACTS	4

/* MDT header byte bit definitions */
#define REGISTRATION_SUCCESS	0
#define REGISTRATION_ERROR	1
#define KEY_PRESSED		1
#define KEY_RELEASED		0
#define MDT_TOUCH_INACTIVE	1
#define MDT_TOUCH_ACTIVE	2

/* Common header bit definitions */
#define MDT_HDR_IS_HID		0x80
#define MDT_HDR_IS_PORT_B	0x40
#define MDT_HDR_IS_KEYBOARD	0x20
#define MDT_HDR_IS_NOT_LAST	0x10
#define MDT_HDR_IS_NOT_MOUSE	0x08

/* Keyboard event specific header bit definitions */
#define MDT_HDR_KBD_LEFT_ALT	0x04
#define MDT_HDR_KBD_LEFT_SHIFT	0x02
#define MDT_HDR_KBD_LEFT_CTRL	0x01

/* Mouse event specific header bit definitions */
#define MDT_HDR_MOUSE_BUTTON_3		0x04
#define MDT_HDR_MOUSE_BUTTON_2		0x02
#define MDT_HDR_MOUSE_BUTTON_1		0x01
#define MDT_HDR_MOUSE_BUTTON_MASK	0x07

/* Touch pad event specific header bit definitions */
#define MDT_HDR_TOUCH_IS_TOUCHED	0x01
#define MDT_HDR_TOUCH_CONTACT_ID_MASK	0x06

/* Game controller event specific header bit definitions */
#define MDT_HDR_GAME_BUTTON_3	0x04
#define MDT_HDR_GAME_BUTTON_2	0x02
#define MDT_HDR_GAME_BUTTON_1	0x01

/* MDT hot-plug prefix and event information */
#define MDT_VERSION			1
#define M_CHAR				'M'
#define D_CHAR				'D'
#define T_CHAR				'T'
#define NOTICE_DEV_PLUG			'R'
#define NOTICE_DEV_UNPLUG		'U'
#define RESPONSE_ACK			'A'
#define RESPONSE_NACK			'N'

/* MDT Touch screen resources and parameters */

#define MDT_TOUCH_X			0
#define MDT_TOUCH_Y			1
#define BYTE_LOW			0
#define BYTE_HIGH			1
#define MDT_TOUCH_X_LOW			BYTE_LOW
#define MDT_TOUCH_X_HIGH		BYTE_HIGH
#define MDT_TOUCH_Y_LOW			BYTE_LOW
#define MDT_TOUCH_Y_HIGH		BYTE_HIGH

/* support 11 bit absolute addressing        */
#define X_CORNER_RIGHT_LOWER		1870
#define Y_CORNER_RIGHT_LOWER		1870
#define ICS_BeagleboardxM		1
#define X_MAX				1920
#define Y_MAX				1920
#define SCALE_X_RAW			0
#define SCALE_X_SCREEN			0
#define SCALE_Y_RAW			0
#define SCALE_Y_SCREEN			0
#define X_SHIFT				0
#define Y_SHIFT				0
#define SWAP_LEFTRIGHT			0
#define SWAP_UPDOWN			0
#define SWAP_XY				0
#define SINGLE_TOUCH			1
#define CORNER_BUTTON			1
#define ICS_BAR				0
#define RIGHT_MOUSE_BUTTON_IS_ESC	1
/* requires installation of IDC file */
/* #define KERNEL_2_6_38_AND_LATER */
/* as of JB the IDC file is needed but, doesn't
	guarantee acess to virtual buttons. */
#define JB_421				0
#if (JB_421 == 1)
#define X_BUTTON_BAR_START		0x4F0
#define Y_BUTTON_RECENTAPPS_TOP		0x050
#define Y_BUTTON_RECENTAPPS_BOTTOM	0x165
#define Y_BUTTON_HOME_TOP		0x185
#define Y_BUTTON_HOME_BOTTOM		0x2C0
#define Y_BUTTON_BACK_TOP		0x2E0
#define Y_BUTTON_BACK_BOTTOM		0x3E0
#endif

enum mdt_dev_state_e {
	INPUT_DISABLED,
	INPUT_WAITING_FOR_REGISTRATION,
	INPUT_ACTIVE
};

enum mdt_dev_types_e {
	MDT_TYPE_MOUSE,
	MDT_TYPE_KEYBOARD,
	MDT_TYPE_TOUCHSCREEN,
	MDT_TYPE_COUNT
};

struct mdt_touch_history_t {
	uint32_t abs_x;
	uint32_t abs_y;
	uint8_t isTouched;
	uint8_t state;
};

struct mdt_inputdevs {
	/* Prior HID input report */
	uint8_t keycodes_old[HID_INPUT_REPORT_CNT];
	/* Current HID input report */
	uint8_t keycodes_new[HID_INPUT_REPORT_CNT];
	struct input_dev *dev_keyboard;
	struct input_dev *dev_mouse;
	struct input_dev *dev_touchscreen;
	/* Instance tracking variable */
	uint8_t is_dev_registered[MDT_TYPE_COUNT];
	struct mdt_touch_history_t prior_touch_events[MAX_TOUCH_CONTACTS];
	unsigned char prior_touch_button;

#if (RIGHT_MOUSE_BUTTON_IS_ESC == 1)
	unsigned char prior_right_button;
#endif
	/* ser overrides to allow runtime calibration */
	uint32_t x_max, y_max;
	uint32_t x_screen, x_raw, x_shift;
	uint32_t y_screen, y_raw, y_shift;
	uint32_t swap_xy, swap_updown, swap_leftright;
};

struct keyboard_event_data {
	uint8_t first_key[3];
	uint8_t second_key[3];
};

struct mouse_event_data {
	int8_t x_displacement;
	int8_t y_displacement;
	int8_t z_displacement;
	uint8_t vendor_specific[2];
	uint8_t vendor_specific_game_flag;
};

struct touch_pad_event_data {
	uint8_t x_abs_coordinate[2];
	uint8_t y_abs_coordinate[2];
	uint8_t vendor_specific;
	uint8_t vendor_specific_game_flag;
};

struct gaming_controller {
	int8_t x_rel_displacement;
	int8_t y_rel_displacement;
	int8_t z_rel_displacement;
	int8_t y2_rel_displacement;
	uint8_t buttons_ext;
	uint8_t id_dpad;
};

struct mdt_hotplug_data {
	uint8_t sub_header_d;
	uint8_t sub_header_t;
	uint8_t event_code;
	uint8_t device_type;
	uint8_t mdt_version;
	uint8_t reserved;
};

struct mdt_packet {
	uint8_t adopter_id_h;
	uint8_t adopter_id_l;
	uint8_t header;
	union {
		struct keyboard_event_data keyboard;
		struct mouse_event_data mouse;
		struct touch_pad_event_data touch_pad;
		struct gaming_controller game_controller;
		struct mdt_hotplug_data hotplug;
		uint8_t bytes[6];
	} event;
};

struct mhl_dev_context;
extern struct attribute_group mdt_attr_group;
void mdt_toggle_keyboard_keycode(struct mhl_dev_context *dev_context,
	unsigned char keycode);
bool si_mhl_tx_mdt_process_packet(struct mhl_dev_context *dev_context,
	void *packet);

void mdt_destroy(struct mhl_dev_context *dev_context);

#endif /* #ifndef _SI_MDT_INPUTDEV_H_ */