/*
 * driver/input/touchscreen/goodix_touch.c
 *
 * Copyright(c) 2010 Goodix Technology Corp.
 *
 * 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.
 *
 * Change Date:
 *		2010.11.11, add point_queue's definiens.
 *
 *		2011.03.09, rewrite point_queue's definiens.
 *
 *		2011.05.12, delete point_queue for Android 2.2/Android 2.3 and so on.
 *
 */
#include <linux/i2c.h>
#include <linux/input.h>
#include "goodix_touch.h"
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include "../init-input.h"
#include <linux/gpio.h>
#include <linux/pm_runtime.h>
#ifdef CONFIG_PM
#include <linux/pm.h>
#endif

#define FOR_TSLIB_TEST
#define TEST_I2C_TRANSFER


#ifndef GUITAR_GT80X
#error The code does not match the hardware version.
#endif

static struct ctp_config_info config_info = {
	.input_type = CTP_TYPE,
	.name = NULL,
	.int_number = 0,
};

struct goodix_ts_data {
	int retry;
	int panel_type;
	uint8_t bad_data;
	char phys[32];
	struct i2c_client *client;
	struct input_dev *input_dev;
	uint8_t use_irq;
	uint8_t use_shutdown;
	uint32_t gpio_shutdown;
	uint32_t gpio_irq;
	uint32_t screen_width;
	uint32_t screen_height;
	bool is_suspended;
	struct ts_event		event;
	struct hrtimer timer;
	struct work_struct  work;
	int (*power)(struct goodix_ts_data *ts, int on);
};

static const char *f3x_ts_name = "gt82x";
static struct workqueue_struct *goodix_wq;
#define X_DIFF (800)
static uint8_t config_info1[114];
static uint8_t data_info0[] = {
	0x0F, 0x80,
	0x02, 0x11, 0x03, 0x12, 0x04, 0x13, 0x05, 0x14,
	0x06, 0x15, 0x07, 0x16, 0x08, 0x17, 0x09, 0x18,
	0x0A, 0x19, 0x0B, 0x1A, 0xFF, 0x15, 0x16, 0x17,
	0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x03, 0x0D,
	0x04, 0x0E, 0x05, 0x0F, 0x06, 0x10, 0x07, 0x11,
	0x08, 0x12, 0xFF, 0x0D, 0xFF, 0x0F, 0x10, 0x11,
	0x12, 0x13, 0x0F, 0x03, 0x10, 0x88, 0x88, 0x20,
	0x00, 0x00, 0x06, 0x00, 0x00, 0x02, 0x50, 0x3C,
	0x35, 0x03, 0x00, 0x05, 0x00, 0x03, 0x20, 0x05,
	0x00, 0x5A, 0x5A, 0x46, 0x46, 0x08, 0x00, 0x03,
	0x19, 0x05, 0x14, 0x10, 0x00, 0x07, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01
};
static uint8_t data_info1[] = {
	0x0F, 0x80,
	0x00, 0x0F, 0x01, 0x10, 0x02, 0x11, 0x03, 0x12,
	0x04, 0x13, 0x05, 0x14, 0x06, 0x15, 0x07, 0x16,
	0x08, 0x17, 0x09, 0x18, 0x0A, 0x19, 0x0B, 0x1A,
	0x0C, 0x1B, 0x0D, 0x1C, 0x0E, 0x1D, 0x13, 0x09,
	0x12, 0x08, 0x11, 0x07, 0x10, 0x06, 0x0F, 0x05,
	0x0E, 0x04, 0x0D, 0x03, 0x0C, 0x02, 0x0B, 0x01,
	0x0A, 0x00, 0x0B, 0x03, 0x10, 0x00, 0x00, 0x2C,
	0x00, 0x00, 0x03, 0x00, 0x00, 0x02, 0x40, 0x30,
	0x60, 0x03, 0x00, 0x05, 0x00, 0x03, 0x20, 0x05,
	0x00, 0x66, 0x4E, 0x60, 0x49, 0x06, 0x00, 0x23,
	0x19, 0x05, 0x14, 0x10, 0x03, 0xFC, 0x01, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01
};

enum {
	DEBUG_INIT = 1U << 0,
	DEBUG_SUSPEND = 1U << 1,
	DEBUG_INT_INFO = 1U << 2,
	DEBUG_X_Y_INFO = 1U << 3,
	DEBUG_KEY_INFO = 1U << 4,
	DEBUG_WAKEUP_INFO = 1U << 5,
	DEBUG_OTHERS_INFO = 1U << 6,
};

#define CTP_IRQ_MODE		(IRQF_TRIGGER_FALLING)
#define CTP_NAME		"gt82x"
#define SCREEN_MAX_X		(screen_max_x)
#define SCREEN_MAX_Y		(screen_max_y)
#define PRESS_MAX		(255)

#define READ_TOUCH_ADDR_H   0x0F
#define READ_TOUCH_ADDR_L   0x40

static u32 screen_max_x;
static u32 screen_max_y;
static u32 revert_x_flag;
static u32 revert_y_flag;
static u32 exchange_x_y_flag;

static __u32 twi_id;

/* Addresses to scan */

static const unsigned short normal_i2c[2] = {0x5d, I2C_CLIENT_END};
static const int chip_id_value[3] = {0x13, 0x27, 0x28};
static uint8_t read_chip_value[3] = {0x0f, 0x7d, 0};

/*used by GT80X-IAP module */
static struct i2c_client *i2c_connect_client;

static void goodix_init_events(struct work_struct *work);
static void goodix_resume_events(struct work_struct *work);
static struct workqueue_struct *goodix_init_wq;
static struct workqueue_struct *goodix_resume_wq;
static DECLARE_WORK(goodix_init_work, goodix_init_events);
static DECLARE_WORK(goodix_resume_work, goodix_resume_events);
static struct goodix_ts_data *ts_init;

/*
 * Function:
 * Read data from the i2c slave device.
 * Input:
 *	client:i2c device.
 *	buf[0]:operate address.
 *	buf[1]~buf[len]:read data buffer.
 *	len:operate length.
 * Output:
 *	numbers of i2c_msgs to transfer
 */
static int i2c_read_bytes(struct i2c_client *client, uint8_t *buf, uint16_t len)
{
	struct i2c_msg msgs[2];
	int ret = -1;

	msgs[0].flags = !I2C_M_RD;
	msgs[0].addr = client->addr;
	msgs[0].len = 2;
	msgs[0].buf = buf;

	msgs[1].flags = I2C_M_RD;
	msgs[1].addr = client->addr;
	msgs[1].len = len-2;
	msgs[1].buf = buf+2;

	ret = i2c_transfer(client->adapter, msgs, 2);

	return ret;
}

/*
 * Function:
 *	write data to the i2c slave device.
 * Input:
 *	client:i2c device.
 *	buf[0]:operate address.
 *	buf[1]~buf[len]:write data buffer.
 *	len:operate length.
 * Output:
 *	numbers of i2c_msgs to transfer.
 */
static int i2c_write_bytes(struct i2c_client *client, uint8_t *data, uint16_t len)
{
	struct i2c_msg msg;
	int ret = -1;

	msg.flags = !I2C_M_RD;
	msg.addr = client->addr;
	msg.len = len;
	msg.buf = data;

	ret = i2c_transfer(client->adapter, &msg, 1);

	return ret;
}

/*
 * Function:
 *	write i2c end cmd.
 * ts:
 *	client Private data structures
 * return:
 *	Successful returns 1
 */
static s32 i2c_end_cmd(struct goodix_ts_data *ts)
{
	s32 ret;
	u8 end_cmd_data[2] = {0x80, 0x00};

	ret = i2c_write_bytes(ts->client, end_cmd_data, 2);

	return ret;
}

/**
 * ctp_detect - Device detection callback for automatic device creation
 * return value:
 *                    = 0; success;
 *                    < 0; err
 */
static int ctp_detect(struct i2c_client *client, struct i2c_board_info *info)
{
	struct i2c_adapter *adapter = client->adapter;
	int  i = 0;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
		pr_info("======return=====\n");
		return -ENODEV;
	}
	if (twi_id == adapter->nr) {
		i2c_read_bytes(client, read_chip_value, 3);
		pr_debug("addr:0x%x,chip_id_value:0x%x\n",
					client->addr, read_chip_value[2]);
		while (chip_id_value[i++]) {
			if (read_chip_value[2] == chip_id_value[i - 1]) {
				strlcpy(info->type, CTP_NAME, I2C_NAME_SIZE);
				return 0;
			}
		}
		pr_err("%s:I2C connection might be something wrong !\n",
								__func__);
		return -ENODEV;
	} else
		return -ENODEV;
}

static ssize_t gt82x_enable_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct input_dev *input = to_input_dev(dev);
	struct i2c_client *client = input_get_drvdata(input);
	ssize_t size;

	size = sprintf(buf, "%d\n", !pm_runtime_suspended(&client->dev));
	return size;
}

static ssize_t gt82x_enable_store(struct device *dev,
					struct device_attribute *attr,
					const char *buf, size_t count)
{
	unsigned long data;
	int error;
	struct input_dev *input = to_input_dev(dev);
	struct i2c_client *client = input_get_drvdata(input);

	error = kstrtoul(buf, 10, &data);
	if (error)
		return error;
	if (data == 0)
		pm_runtime_put_sync(&client->dev);
	 else if (data == 1)
		pm_runtime_get_sync(&client->dev);

	return count;
}

static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR,
			gt82x_enable_show, gt82x_enable_store);

static struct attribute *gt82x_att_als[] = {
	&dev_attr_enable.attr,
	NULL
};

static struct attribute_group gt82x_als_gr = {
	.attrs = gt82x_att_als
};

/**
 * ctp_print_info - sysconfig print function
 * return value:
 *
 */
static void ctp_print_info(struct ctp_config_info info, int debug_level)
{
	if (debug_level == DEBUG_INIT) {
		pr_debug("info.ctp_used:%d\n", info.ctp_used);
		pr_debug("info.twi_id:%d\n", info.twi_id);
		pr_debug("info.screen_max_x:%d\n", info.screen_max_x);
		pr_debug("info.screen_max_y:%d\n", info.screen_max_y);
		pr_debug("info.revert_x_flag:%d\n", info.revert_x_flag);
		pr_debug("info.revert_y_flag:%d\n", info.revert_y_flag);
		pr_debug("info.exchange_x_y_flag:%d\n", info.exchange_x_y_flag);
		pr_debug("info.irq_gpio_number:%d\n", info.irq_gpio.gpio);
		pr_debug("info.wakeup_gpio_number:%d\n", info.wakeup_gpio.gpio);
	}
}

/**
 * ctp_wakeup - function
 *
 */
static int ctp_wakeup(int status, int ms)
{
	pr_debug("***CTP*** %s:status:%d, ms = %d\n", __func__, status, ms);
	if (status == 0) {
		if (ms == 0)
			__gpio_set_value(config_info.wakeup_gpio.gpio, 0);
		else {
			__gpio_set_value(config_info.wakeup_gpio.gpio, 0);
			msleep(ms);
			__gpio_set_value(config_info.wakeup_gpio.gpio, 1);
		}
	}
	if (status == 1) {
		if (ms == 0)
			__gpio_set_value(config_info.wakeup_gpio.gpio, 1);
		else {
			__gpio_set_value(config_info.wakeup_gpio.gpio, 1);
			msleep(ms);
			__gpio_set_value(config_info.wakeup_gpio.gpio, 0);
		}
	}
	usleep_range(5000, 6000);

	return 0;
}

/*
 * Foundation
 *	i2c communication test
 * ts:i2c client structure
 * return:
 *	Successful :1 fail:0
 */
#ifdef CTP_STANDBY
static bool goodix_i2c_test(struct i2c_client *client)
{
	int ret, retry;
	uint8_t test_data[1] = {0};

	for (retry = 0; retry < 5; retry++) {
		ret = i2c_write_bytes(client, test_data, 1);
		if (ret == 1)
			break;
		usleep_range(5000, 6000);
	}

	return ret == 1 ? true : false;
}
#endif

/*
 * Function:
 *	GTP initialize function.
 * Input:
 * ts:	i2c client private struct.
 * Output:
 *	Executive outcomes.1---succeed.
 */
static int goodix_init_panel(struct goodix_ts_data *ts)
{
	int ret = -1;
	int i = 0;

	pr_debug("init panel\n");

	if (read_chip_value[2] == 0x13)
		ret = i2c_write_bytes(ts->client, data_info0, 114);
	else if (read_chip_value[2] == 0x28)
		ret = i2c_write_bytes(ts->client, data_info1, 114);

	i2c_end_cmd(ts);
	usleep_range(10000, 11000);
	pr_debug("init panel ret = %d\n", ret);
	if (ret < 0)
		return ret;
	msleep(100);
	config_info1[0] = 0x0F;
	config_info1[1] = 0x80;
	ret = i2c_read_bytes(ts->client, config_info1, 114);
	for (i = 0; i < 114; i++)
		pr_debug("i = %d config_info1[i] = %x\n", i, config_info1[i]);

	usleep_range(10000, 11000);

	return 1;
}

static s32 goodix_ts_version(struct goodix_ts_data *ts)

{
	u8 buf[8];

	buf[0] = 0x0f;
	buf[1] = 0x7d;
	i2c_read_bytes(ts->client, buf, 5);
	i2c_end_cmd(ts);
	pr_debug("PID:%02x, VID:%02x%02x\n", buf[2], buf[3], buf[4]);

	return 1;
}

/*
 * Function:
 *	Touch down report function.
 * Input:
 *	ts:private data.
 *	id:tracking id.
 *	x:input x.
 *	y:input y.
 *	w:input weight.
 * Output:
 *	None.
 */
static void goodix_touch_down(struct goodix_ts_data *ts, s32 id,
						s32 x, s32 y, s32 w)
{
	pr_debug("source data:ID:%d, X:%d, Y:%d, W:%d\n", id, x, y, w);
	if (exchange_x_y_flag == 1)
		swap(x, y);

	if (revert_x_flag == 1)
		x = SCREEN_MAX_X - x;

	if (revert_y_flag == 1)
		y = SCREEN_MAX_Y - y;

	pr_debug("report data:ID:%d, X:%d, Y:%d, W:%d\n", id, x, y, w);
	input_report_abs(ts->input_dev, ABS_MT_POSITION_X, x);
	input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, y);
	input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, w);
	input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, w);
	input_report_abs(ts->input_dev, ABS_MT_TRACKING_ID, id);
	input_mt_sync(ts->input_dev);
}
/*
 * Function:
 *	Touch up report function.
 * Input:
 *	ts:private data.
 * Output:
 *	None.
 */
static void goodix_touch_up(struct goodix_ts_data *ts)
{
	input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
	input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0);
	input_mt_sync(ts->input_dev);
}

static void goodix_ts_work_func(struct work_struct *work)
{
	u8 *coor_data = NULL;
	u8  point_data[2 + 2 + 5 * MAX_FINGER_NUM + 1] = {READ_TOUCH_ADDR_H,
							READ_TOUCH_ADDR_L};
	u8  check_sum = 0;
	u8  touch_num = 0;
	u8  finger = 0;
	u8  key_value = 0;
	s32 input_x = 0;
	s32 input_y = 0;
	s32 input_w = 0;
	s32 idx = 0;
	s32 ret = -1;
	struct goodix_ts_data *ts = NULL;

	pr_debug("===enter %s===\n", __func__);
	ts = container_of(work, struct goodix_ts_data, work);

	ret = i2c_read_bytes(ts->client, point_data, 10);
	finger = point_data[2];
	touch_num = (finger & 0x01) + !!(finger & 0x02) + !!(finger & 0x04) +
					!!(finger & 0x08) + !!(finger & 0x10);
	if (touch_num > 1) {
		u8 buf[25];

		buf[0] = READ_TOUCH_ADDR_H;
		buf[1] = READ_TOUCH_ADDR_L + 8;
		ret = i2c_read_bytes(ts->client, buf, 5 * (touch_num - 1) + 2);
		memcpy(&point_data[10], &buf[2], 5 * (touch_num - 1));
	}
	i2c_end_cmd(ts);

	if (ret <= 0) {
		pr_err("%s:I2C read error!", __func__);
		goto exit_work_func;
	}

	if ((finger & 0xC0) != 0x80) {
		pr_debug("%s:Data not ready!", __func__);
		goto exit_work_func;
	}

	key_value = point_data[3]&0x0f;
	if ((key_value & 0x0f) == 0x0f) {
		if (!goodix_init_panel(ts))
			pr_err("%s:Reload config failed!\n", __func__);

		goto exit_work_func;
	}

	coor_data = &point_data[4];
	check_sum = 0;
	for (idx = 0; idx < 5 * touch_num; idx++)
		check_sum += coor_data[idx];

	if (check_sum != coor_data[5 * touch_num]) {
		pr_err("%s:Check sum error!", __func__);
		goto exit_work_func;
	}

	if (touch_num) {
		s32 pos = 0;

		for (idx = 0; idx < MAX_FINGER_NUM; idx++) {
			if (!(finger & (0x01 << idx)))
				continue;

			input_x  = coor_data[pos] << 8;
			input_x |= coor_data[pos + 1];

			input_y  = coor_data[pos + 2] << 8;
			input_y |= coor_data[pos + 3];

			input_w  = coor_data[pos + 4];

			pos += 5;

			goodix_touch_down(ts, idx, input_x, input_y, input_w);
		}
	} else {
		pr_debug("Touch Release!");
		goodix_touch_up(ts);
	}

#if GTP_HAVE_TOUCH_KEY
	for (idx = 0; idx < GTP_MAX_KEY_NUM; idx++)
		input_report_key(ts->input_dev, touch_key_array[idx],
						key_value & (0x01<<idx));
#endif
	input_report_key(ts->input_dev, BTN_TOUCH, (touch_num || key_value));
	input_sync(ts->input_dev);

exit_work_func:
	return;
}

static irqreturn_t goodix_ts_irq_hanbler(int irq, void *dev_id)
{
	struct goodix_ts_data *ts = (struct goodix_ts_data *)dev_id;

	pr_debug("==========------TS Interrupt-----============\n");
	queue_work(goodix_wq, &ts->work);

	return IRQ_HANDLED;
}

static int goodix_ts_power(struct goodix_ts_data *ts, int on)
{
	s32 ret = -1;
	u8 i2c_control_buf1[3] = {0x0F, 0xF2, 0xc0};
	u8 i2c_control_buf2[3] = {0x0F, 0xF2, 0x00};

	switch (on) {
	case 0:
		ret = i2c_write_bytes(ts->client, i2c_control_buf1, 3);
		i2c_end_cmd(ts);
		break;
	case 1:
		ctp_wakeup(0, 100);
		#ifdef CTP_STANDBY
		if (standby_level == STANDBY_WITH_POWER_OFF) {
			ret = goodix_i2c_test(ts->client);
			if (!ret) {
				pr_err("Warnning: I2C connection might be something wrong!\n");
				ctp_wakeup(0, 50);
				ret = goodix_i2c_test(ts->client);
				if (!ret) {
					pr_err("retry fail!\n");
					return -1;
				}
			}
			pr_info("===== goodix i2c test ok=======\n");
		}
		#endif
		ret = goodix_init_panel(ts);
		if (ret != 1) {
			pr_err("init panel fail!\n");
			return -1;
		}
		ret = i2c_write_bytes(ts->client, i2c_control_buf2, 3);
		usleep_range(10000, 11000);
		ret = 1;
		break;
	default:
		pr_err("%s: Cant't support this command.", f3x_ts_name);
		ret = -EINVAL;
		break;
	}

	return ret;
}

static void goodix_resume_events(struct work_struct *work)
{
	int ret;
	u8 i2c_control_buf[3] = {0x0F, 0xF2, 0x00};

	if (ts_init->is_suspended == false) {
		ctp_wakeup(0, 2);
		ret = i2c_write_bytes(ts_init->client, i2c_control_buf, 3);
		if (ret != 1)
			pr_err("set active mode fail!\n");

		usleep_range(10000, 11000);
	} else if (ts_init->power) {
		ret = ts_init->power(ts_init, 1);
		if (ret < 0)
			pr_debug("%s power on failed\n", f3x_ts_name);
	}
	ret = input_set_int_enable(&(config_info.input_type), 1);
	ts_init->is_suspended = false;
	if (ret < 0)
		pr_debug("%s irq enable failed\n", f3x_ts_name);
}

static int goodix_ts_suspend(struct device *dev)
{
	int ret;
	struct goodix_ts_data *ts = dev_get_drvdata(dev);

	pr_debug("CONFIG_PM:enter earlysuspend: goodix_ts_suspend.\n");
	if (pm_runtime_suspended(dev))
		return 0;

	if (ts->is_suspended == false) {
		flush_workqueue(goodix_resume_wq);
		ret = input_set_int_enable(&(config_info.input_type), 0);
		if (ret < 0)
			pr_debug("%s irq disable failed\n", f3x_ts_name);

		ret = cancel_work_sync(&ts->work);
		flush_workqueue(goodix_wq);
		if (ts->power) {
			ret = ts->power(ts, 0);
			if (ret < 0)
				pr_debug("%s power off failed\n", f3x_ts_name);
		}
		ts->is_suspended = true;
	}
	return 0;
}

static int goodix_ts_resume(struct device *dev)
{
	struct goodix_ts_data *ts = dev_get_drvdata(dev);

	pr_debug("CONFIG_PM:enter laterresume: goodix_ts_resume.\n");
	if (pm_runtime_suspended(dev))
		return 0;
	if (ts->is_suspended == true)
		queue_work(goodix_resume_wq, &goodix_resume_work);

	return 0;
}

static void goodix_init_events(struct work_struct *work)
{
	int ret = 0;

	ctp_wakeup(0, 100);
	ret = goodix_init_panel(ts_init);
	if (!ret)
		pr_err("init panel fail!\n");
	else
		pr_debug("init panel succeed!\n");

	config_info.dev = &(ts_init->input_dev->dev);
	ret = input_request_int(&(config_info.input_type), goodix_ts_irq_hanbler,
				CTP_IRQ_MODE, ts_init);
	if (ret)
		pr_info("goodix_probe: request irq failed\n");
}

static int goodix_ts_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct goodix_ts_data *ts;
	int ret = 0;

	pr_debug("=============GT82x Probe==================\n");

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
		dev_err(&client->dev, "System need I2C function.\n");
		ret = -ENODEV;
		goto err_check_functionality_failed;
	}

	ts = kzalloc(sizeof(*ts), GFP_KERNEL);
	if (ts == NULL) {
		ret = -ENOMEM;
		goto err_alloc_data_failed;
	}


	i2c_connect_client = client;	 /* used by Guitar Updating */

	INIT_WORK(&ts->work, goodix_ts_work_func);
	ts->client = client;
	i2c_set_clientdata(ts->client, ts);

	ts->input_dev = input_allocate_device();
	if (ts->input_dev == NULL) {
		ret = -ENOMEM;
		dev_dbg(&client->dev, "Failed to allocate input device\n");
		goto err_input_dev_alloc_failed;
	}

	ts->input_dev->evbit[0] = BIT_MASK(EV_SYN) | BIT_MASK(EV_KEY)
							| BIT_MASK(EV_ABS);

#ifndef GOODIX_MULTI_TOUCH
	ts->input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
	ts->input_dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
	input_set_abs_params(ts->input_dev, ABS_X, 0, SCREEN_MAX_X, 0, 0);
	input_set_abs_params(ts->input_dev, ABS_Y, 0, SCREEN_MAX_Y, 0, 0);
	input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 255, 0, 0);

#else
	ts->input_dev->absbit[0] = BIT_MASK(ABS_MT_TRACKING_ID) |
		BIT_MASK(ABS_MT_TOUCH_MAJOR) | BIT_MASK(ABS_MT_WIDTH_MAJOR) |
		BIT_MASK(ABS_MT_POSITION_X) | BIT_MASK(ABS_MT_POSITION_Y);
	input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
	input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 0, SCREEN_MAX_X,
									0, 0);
	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 0, SCREEN_MAX_Y,
									0, 0);
	input_set_abs_params(ts->input_dev, ABS_MT_TRACKING_ID, 0,
							MAX_FINGER_NUM, 0, 0);
#endif

#ifdef FOR_TSLIB_TEST
	set_bit(BTN_TOUCH, ts->input_dev->keybit);
#endif

	sprintf(ts->phys, "input/goodix-ts");
	ts->input_dev->name = CTP_NAME;
	ts->input_dev->phys = ts->phys;
	ts->input_dev->id.bustype = BUS_I2C;
	ts->input_dev->id.vendor = 0xDEAD;
	ts->input_dev->id.product = 0xBEEF;
	ts->input_dev->id.version = 0x1105;

	ts->is_suspended = false;

	ret = input_register_device(ts->input_dev);
	if (ret) {
		dev_err(&client->dev, "Unable to register %s input device\n",
							ts->input_dev->name);
		goto err_input_register_device_failed;
	}
	input_set_drvdata(ts->input_dev, client);
	ret = sysfs_create_group(&ts->input_dev->dev.kobj,
						 &gt82x_als_gr);
	if (ret < 0) {
		dev_err(&client->dev, "gt82x: sysfs_create_group err\n");
		goto err_input_register_device_failed;
	}

	goodix_wq = create_singlethread_workqueue("goodix_wq");
	if (!goodix_wq) {
		pr_err("Creat %s workqueue failed.\n", f3x_ts_name);
		return -ENOMEM;

	}
	flush_workqueue(goodix_wq);
	ts->power = goodix_ts_power;

	ts_init = ts;

	goodix_init_wq = create_singlethread_workqueue("goodix_init");
	if (goodix_init_wq == NULL) {
		pr_err("create goodix_wq fail!\n");
		return -ENOMEM;
	}

	goodix_resume_wq = create_singlethread_workqueue("goodix_resume");
	if (goodix_resume_wq == NULL) {
		pr_err("create goodix_resume_wq fail!\n");
		return -ENOMEM;
	}

	queue_work(goodix_init_wq, &goodix_init_work);

	goodix_ts_version(ts);
	pm_runtime_set_active(&client->dev);
	pm_runtime_get(&client->dev);
	pm_runtime_enable(&client->dev);

	pr_debug("========Probe Ok================\n");

	return 0;

err_input_register_device_failed:
	input_free_device(ts->input_dev);
err_input_dev_alloc_failed:
	i2c_set_clientdata(client, NULL);
err_alloc_data_failed:
err_check_functionality_failed:
	return ret;
}

static int goodix_ts_remove(struct i2c_client *client)
{
	struct goodix_ts_data *ts = i2c_get_clientdata(client);

	dev_notice(&client->dev, "The driver is removing...\n");

	input_free_int(&(config_info.input_type), ts_init);

	cancel_work_sync(&goodix_init_work);
	cancel_work_sync(&goodix_resume_work);
	flush_workqueue(goodix_wq);
	if (goodix_resume_wq)
		destroy_workqueue(goodix_resume_wq);
	if (goodix_init_wq)
		destroy_workqueue(goodix_init_wq);
	if (goodix_wq)
		destroy_workqueue(goodix_wq);
	pm_runtime_disable(&client->dev);
	pm_runtime_set_suspended(&client->dev);
	sysfs_remove_group(&ts->input_dev->dev.kobj, &gt82x_als_gr);
	input_unregister_device(ts->input_dev);
	i2c_set_clientdata(ts->client, NULL);
	kfree(ts);

	return 0;
}

static const struct i2c_device_id goodix_ts_id[] = {
	{CTP_NAME, 0},
};

static const struct dev_pm_ops gt82x_pm_ops = {
	.suspend = goodix_ts_suspend,
	.resume = goodix_ts_resume,
	};

#define GT82X_PM_OPS (&gt82x_pm_ops)

static struct i2c_driver goodix_ts_driver = {
	.class = I2C_CLASS_HWMON,
	.probe		= goodix_ts_probe,
	.remove		= goodix_ts_remove,
	.id_table	= goodix_ts_id,
	.driver = {
		.name	= CTP_NAME,
		.owner = THIS_MODULE,
		.pm = GT82X_PM_OPS,
	},
	.detect         = ctp_detect,
	.address_list	= normal_i2c,
};

static int ctp_get_system_config(void)
{
	ctp_print_info(config_info, DEBUG_INIT);
	twi_id = config_info.twi_id;
	screen_max_x = config_info.screen_max_x;
	screen_max_y = config_info.screen_max_y;
	revert_x_flag = config_info.revert_x_flag;
	revert_y_flag = config_info.revert_y_flag;
	exchange_x_y_flag = config_info.exchange_x_y_flag;
	if ((screen_max_x == 0) || (screen_max_y == 0)) {
		pr_err("%s:read config error!\n", __func__);
		return 0;
	}

	return 1;
}
static int __init goodix_ts_init(void)
{
	int ret = -1;

	pr_debug("*********************************************\n");
	if (!input_sensor_startup(&(config_info.input_type))) {
		ret = input_sensor_init(&(config_info.input_type));
		if (ret != 0) {
			pr_err("%s:ctp_ops.input_sensor_init err.\n", __func__);
			goto init_err;
		}
		input_set_power_enable(&(config_info.input_type), 1);
	} else {
		pr_err("%s: input_ctp_startup err.\n", __func__);
		return 0;
	}
	if (config_info.ctp_used == 0) {
		pr_info("*** ctp_used set to 0 !\n");
		pr_info("*** if use ctp, please put the sys_config.fex ctp_used set to 1.\n");
		ret = 0;
		goto init_err;
	}
	if (!ctp_get_system_config()) {
		pr_err("%s:read config fail!\n", __func__);
		goto init_err;
	}
	ctp_wakeup(0, 2);

	ret = i2c_add_driver(&goodix_ts_driver);
	if (ret)
		goto init_err;

	pr_debug("*********************************************\n");
	return ret;
init_err:
	input_set_power_enable(&(config_info.input_type), 0);
	return ret;
}

static void __exit goodix_ts_exit(void)
{
	i2c_del_driver(&goodix_ts_driver);
	input_sensor_free(&(config_info.input_type));
	input_set_power_enable(&(config_info.input_type), 0);
}

late_initcall(goodix_ts_init);
module_exit(goodix_ts_exit);
MODULE_DESCRIPTION("Goodix Touchscreen Driver");
MODULE_LICENSE("GPL v2");