drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.c

/*
 * Synaptics DSX touchscreen driver
 *
 * Copyright (C) 2012 Synaptics Incorporated
 *
 * Copyright (C) 2012 Alexandra Chin <alexandra.chin@tw.synaptics.com>
 * Copyright (C) 2012 Scott Lin <scott.lin@tw.synaptics.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.
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/hrtimer.h>
#include <linux/ktime.h>
#include <linux/regulator/consumer.h>
#include <linux/input/synaptics_dsx_new.h>
#include "synaptics_dsx_core.h"
#ifdef KERNEL_ABOVE_2_6_38
#include <linux/input/mt.h>
#endif

#define INPUT_PHYS_NAME "synaptics_dsx/touch_input"

#define VIRTUAL_KEY_MAP_FILE_NAME "virtualkeys." PLATFORM_DRIVER_NAME

#ifdef KERNEL_ABOVE_2_6_38
#define TYPE_B_PROTOCOL
#endif

#define WAKEUP_GESTURE false

#define NO_0D_WHILE_2D
#define REPORT_2D_Z
#define REPORT_2D_W

#define F12_DATA_15_WORKAROUND

/*
#define IGNORE_FN_INIT_FAILURE
*/

#define RPT_TYPE (1 << 0)
#define RPT_X_LSB (1 << 1)
#define RPT_X_MSB (1 << 2)
#define RPT_Y_LSB (1 << 3)
#define RPT_Y_MSB (1 << 4)
#define RPT_Z (1 << 5)
#define RPT_WX (1 << 6)
#define RPT_WY (1 << 7)
#define RPT_DEFAULT (RPT_TYPE | RPT_X_LSB | RPT_X_MSB | RPT_Y_LSB | RPT_Y_MSB)

#define EXP_FN_WORK_DELAY_MS 1000 /* ms */
#define MAX_F11_TOUCH_WIDTH 15

#define CHECK_STATUS_TIMEOUT_MS 100
#define BLOCK_PALM_DETECT_TIMEOUT_MS 200

#define F01_STD_QUERY_LEN 21
#define F01_BUID_ID_OFFSET 18

#define STATUS_NO_ERROR 0x00
#define STATUS_RESET_OCCURRED 0x01
#define STATUS_INVALID_CONFIG 0x02
#define STATUS_DEVICE_FAILURE 0x03
#define STATUS_CONFIG_CRC_FAILURE 0x04
#define STATUS_FIRMWARE_CRC_FAILURE 0x05
#define STATUS_CRC_IN_PROGRESS 0x06

#define NORMAL_OPERATION (0 << 0)
#define SENSOR_SLEEP (1 << 0)
#define NO_SLEEP_OFF (0 << 2)
#define NO_SLEEP_ON (1 << 2)
#define CONFIGURED (1 << 7)

#define F11_CONTINUOUS_MODE 0x00
#define F11_WAKEUP_GESTURE_MODE 0x04
#define F12_CONTINUOUS_MODE 0x00
#define F12_WAKEUP_GESTURE_MODE 0x02

static int synaptics_rmi4_f12_set_enables(struct synaptics_rmi4_data *rmi4_data,
		unsigned short ctrl28);

static int synaptics_rmi4_free_fingers(struct synaptics_rmi4_data *rmi4_data);
static int synaptics_rmi4_reinit_device(struct synaptics_rmi4_data *rmi4_data);
static int synaptics_rmi4_reset_device(struct synaptics_rmi4_data *rmi4_data);

#ifdef CONFIG_HAS_EARLYSUSPEND
static ssize_t synaptics_rmi4_full_pm_cycle_show(struct device *dev,
		struct device_attribute *attr, char *buf);

static ssize_t synaptics_rmi4_full_pm_cycle_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count);

static void synaptics_rmi4_early_suspend(struct early_suspend *h);

static void synaptics_rmi4_late_resume(struct early_suspend *h);
#endif

static int synaptics_rmi4_suspend(struct device *dev);

static int synaptics_rmi4_resume(struct device *dev);

static ssize_t synaptics_rmi4_f01_reset_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count);

static ssize_t synaptics_rmi4_f01_productinfo_show(struct device *dev,
		struct device_attribute *attr, char *buf);

static ssize_t synaptics_rmi4_f01_buildid_show(struct device *dev,
		struct device_attribute *attr, char *buf);

static ssize_t synaptics_rmi4_f01_flashprog_show(struct device *dev,
		struct device_attribute *attr, char *buf);

static ssize_t synaptics_rmi4_0dbutton_show(struct device *dev,
		struct device_attribute *attr, char *buf);

static ssize_t synaptics_rmi4_0dbutton_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count);

static ssize_t synaptics_rmi4_suspend_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count);

static ssize_t synaptics_rmi4_wake_gesture_show(struct device *dev,
		struct device_attribute *attr, char *buf);

static ssize_t synaptics_rmi4_wake_gesture_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count);

static ssize_t synaptics_rmi4_virtual_key_map_show(struct kobject *kobj,
		struct kobj_attribute *attr, char *buf);

static ssize_t synaptics_rmi4_poll_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count);

static ssize_t synaptics_palm_size_show(struct device *dev,
		struct device_attribute *attr, char *buf);

static ssize_t synaptics_palm_size_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count);

static ssize_t synaptics_mode_show(struct device *dev,
		struct device_attribute *attr, char *buf);

static ssize_t synaptics_mode_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count);

static void synaptics_rmi4_f11_wg(struct synaptics_rmi4_data *, bool);
static void synaptics_rmi4_f12_wg(struct synaptics_rmi4_data *, bool);

struct synaptics_rmi4_f01_device_status {
	union {
		struct {
			unsigned char status_code:4;
			unsigned char reserved:2;
			unsigned char flash_prog:1;
			unsigned char unconfigured:1;
		} __packed;
		unsigned char data[1];
	};
};

struct synaptics_rmi4_f11_query_0_5 {
	union {
		struct {
			/* query 0 */
			unsigned char f11_query0_b0__2:3;
			unsigned char has_query_9:1;
			unsigned char has_query_11:1;
			unsigned char has_query_12:1;
			unsigned char has_query_27:1;
			unsigned char has_query_28:1;

			/* query 1 */
			unsigned char num_of_fingers:3;
			unsigned char has_rel:1;
			unsigned char has_abs:1;
			unsigned char has_gestures:1;
			unsigned char has_sensitibity_adjust:1;
			unsigned char f11_query1_b7:1;

			/* query 2 */
			unsigned char num_of_x_electrodes;

			/* query 3 */
			unsigned char num_of_y_electrodes;

			/* query 4 */
			unsigned char max_electrodes:7;
			unsigned char f11_query4_b7:1;

			/* query 5 */
			unsigned char abs_data_size:2;
			unsigned char has_anchored_finger:1;
			unsigned char has_adj_hyst:1;
			unsigned char has_dribble:1;
			unsigned char has_bending_correction:1;
			unsigned char has_large_object_suppression:1;
			unsigned char has_jitter_filter:1;
		} __packed;
		unsigned char data[6];
	};
};

struct synaptics_rmi4_f11_query_7_8 {
	union {
		struct {
			/* query 7 */
			unsigned char has_single_tap:1;
			unsigned char has_tap_and_hold:1;
			unsigned char has_double_tap:1;
			unsigned char has_early_tap:1;
			unsigned char has_flick:1;
			unsigned char has_press:1;
			unsigned char has_pinch:1;
			unsigned char has_chiral_scroll:1;

			/* query 8 */
			unsigned char has_palm_detect:1;
			unsigned char has_rotate:1;
			unsigned char has_touch_shapes:1;
			unsigned char has_scroll_zones:1;
			unsigned char individual_scroll_zones:1;
			unsigned char has_multi_finger_scroll:1;
			unsigned char has_multi_finger_scroll_edge_motion:1;
			unsigned char has_multi_finger_scroll_inertia:1;
		} __packed;
		unsigned char data[2];
	};
};

struct synaptics_rmi4_f11_query_9 {
	union {
		struct {
			unsigned char has_pen:1;
			unsigned char has_proximity:1;
			unsigned char has_large_object_sensitivity:1;
			unsigned char has_suppress_on_large_object_detect:1;
			unsigned char has_two_pen_thresholds:1;
			unsigned char has_contact_geometry:1;
			unsigned char has_pen_hover_discrimination:1;
			unsigned char has_pen_hover_and_edge_filters:1;
		} __packed;
		unsigned char data[1];
	};
};

struct synaptics_rmi4_f11_query_12 {
	union {
		struct {
			unsigned char has_small_object_detection:1;
			unsigned char has_small_object_detection_tuning:1;
			unsigned char has_8bit_w:1;
			unsigned char has_2d_adjustable_mapping:1;
			unsigned char has_general_information_2:1;
			unsigned char has_physical_properties:1;
			unsigned char has_finger_limit:1;
			unsigned char has_linear_cofficient_2:1;
		} __packed;
		unsigned char data[1];
	};
};

struct synaptics_rmi4_f11_query_27 {
	union {
		struct {
			unsigned char f11_query27_b0:1;
			unsigned char has_pen_position_correction:1;
			unsigned char has_pen_jitter_filter_coefficient:1;
			unsigned char has_group_decomposition:1;
			unsigned char has_wakeup_gesture:1;
			unsigned char has_small_finger_correction:1;
			unsigned char has_data_37:1;
			unsigned char f11_query27_b7:1;
		} __packed;
		unsigned char data[1];
	};
};

struct synaptics_rmi4_f11_ctrl_6_9 {
	union {
		struct {
			unsigned char sensor_max_x_pos_7_0;
			unsigned char sensor_max_x_pos_11_8:4;
			unsigned char f11_ctrl7_b4__7:4;
			unsigned char sensor_max_y_pos_7_0;
			unsigned char sensor_max_y_pos_11_8:4;
			unsigned char f11_ctrl9_b4__7:4;
		} __packed;
		unsigned char data[4];
	};
};

struct synaptics_rmi4_f11_data_1_5 {
	union {
		struct {
			unsigned char x_position_11_4;
			unsigned char y_position_11_4;
			unsigned char x_position_3_0:4;
			unsigned char y_position_3_0:4;
			unsigned char wx:4;
			unsigned char wy:4;
			unsigned char z;
		} __packed;
		unsigned char data[5];
	};
};

struct synaptics_rmi4_f12_query_5 {
	union {
		struct {
			unsigned char size_of_query6;
			struct {
				unsigned char ctrl0_is_present:1;
				unsigned char ctrl1_is_present:1;
				unsigned char ctrl2_is_present:1;
				unsigned char ctrl3_is_present:1;
				unsigned char ctrl4_is_present:1;
				unsigned char ctrl5_is_present:1;
				unsigned char ctrl6_is_present:1;
				unsigned char ctrl7_is_present:1;
			} __packed;
			struct {
				unsigned char ctrl8_is_present:1;
				unsigned char ctrl9_is_present:1;
				unsigned char ctrl10_is_present:1;
				unsigned char ctrl11_is_present:1;
				unsigned char ctrl12_is_present:1;
				unsigned char ctrl13_is_present:1;
				unsigned char ctrl14_is_present:1;
				unsigned char ctrl15_is_present:1;
			} __packed;
			struct {
				unsigned char ctrl16_is_present:1;
				unsigned char ctrl17_is_present:1;
				unsigned char ctrl18_is_present:1;
				unsigned char ctrl19_is_present:1;
				unsigned char ctrl20_is_present:1;
				unsigned char ctrl21_is_present:1;
				unsigned char ctrl22_is_present:1;
				unsigned char ctrl23_is_present:1;
			} __packed;
			struct {
				unsigned char ctrl24_is_present:1;
				unsigned char ctrl25_is_present:1;
				unsigned char ctrl26_is_present:1;
				unsigned char ctrl27_is_present:1;
				unsigned char ctrl28_is_present:1;
				unsigned char ctrl29_is_present:1;
				unsigned char ctrl30_is_present:1;
				unsigned char ctrl31_is_present:1;
			} __packed;
		};
		unsigned char data[5];
	};
};

struct synaptics_rmi4_f12_query_8 {
	union {
		struct {
			unsigned char size_of_query9;
			struct {
				unsigned char data0_is_present:1;
				unsigned char data1_is_present:1;
				unsigned char data2_is_present:1;
				unsigned char data3_is_present:1;
				unsigned char data4_is_present:1;
				unsigned char data5_is_present:1;
				unsigned char data6_is_present:1;
				unsigned char data7_is_present:1;
			} __packed;
			struct {
				unsigned char data8_is_present:1;
				unsigned char data9_is_present:1;
				unsigned char data10_is_present:1;
				unsigned char data11_is_present:1;
				unsigned char data12_is_present:1;
				unsigned char data13_is_present:1;
				unsigned char data14_is_present:1;
				unsigned char data15_is_present:1;
			} __packed;
		};
		unsigned char data[3];
	};
};

struct synaptics_rmi4_f12_ctrl_8 {
	union {
		struct {
			unsigned char max_x_coord_lsb;
			unsigned char max_x_coord_msb;
			unsigned char max_y_coord_lsb;
			unsigned char max_y_coord_msb;
			unsigned char rx_pitch_lsb;
			unsigned char rx_pitch_msb;
			unsigned char tx_pitch_lsb;
			unsigned char tx_pitch_msb;
			unsigned char low_rx_clip;
			unsigned char high_rx_clip;
			unsigned char low_tx_clip;
			unsigned char high_tx_clip;
			unsigned char num_of_rx;
			unsigned char num_of_tx;
		};
		unsigned char data[14];
	};
};

struct synaptics_rmi4_f12_ctrl_23 {
	union {
		struct {
			unsigned char obj_type_enable;
			unsigned char max_reported_objects;
		};
		unsigned char data[2];
	};
};

struct synaptics_rmi4_f12_finger_data {
	unsigned char object_type_and_status;
	unsigned char x_lsb;
	unsigned char x_msb;
	unsigned char y_lsb;
	unsigned char y_msb;
#ifdef REPORT_2D_Z
	unsigned char z;
#endif
#ifdef REPORT_2D_W
	unsigned char wx;
	unsigned char wy;
#endif
};

struct synaptics_rmi4_f1a_query {
	union {
		struct {
			unsigned char max_button_count:3;
			unsigned char reserved:5;
			unsigned char has_general_control:1;
			unsigned char has_interrupt_enable:1;
			unsigned char has_multibutton_select:1;
			unsigned char has_tx_rx_map:1;
			unsigned char has_perbutton_threshold:1;
			unsigned char has_release_threshold:1;
			unsigned char has_strongestbtn_hysteresis:1;
			unsigned char has_filter_strength:1;
		} __packed;
		unsigned char data[2];
	};
};

struct synaptics_rmi4_f1a_control_0 {
	union {
		struct {
			unsigned char multibutton_report:2;
			unsigned char filter_mode:2;
			unsigned char reserved:4;
		} __packed;
		unsigned char data[1];
	};
};

struct synaptics_rmi4_f1a_control {
	struct synaptics_rmi4_f1a_control_0 general_control;
	unsigned char button_int_enable;
	unsigned char multi_button;
	unsigned char *txrx_map;
	unsigned char *button_threshold;
	unsigned char button_release_threshold;
	unsigned char strongest_button_hysteresis;
	unsigned char filter_strength;
};

struct synaptics_rmi4_f1a_handle {
	int button_bitmask_size;
	unsigned char max_count;
	unsigned char valid_button_count;
	unsigned char *button_data_buffer;
	unsigned char *button_map;
	struct synaptics_rmi4_f1a_query button_query;
	struct synaptics_rmi4_f1a_control button_control;
};

struct synaptics_rmi4_exp_fhandler {
	struct synaptics_rmi4_exp_fn *exp_fn;
	bool insert;
	bool remove;
	struct list_head link;
};

struct synaptics_rmi4_exp_fn_data {
	bool initialized;
	bool queue_work;
	struct mutex mutex;
	struct list_head list;
	struct delayed_work work;
	struct workqueue_struct *workqueue;
	struct synaptics_rmi4_data *rmi4_data;
};

static struct synaptics_rmi4_exp_fn_data exp_data;

struct synaptics_dsx_button_map *vir_button_map;

static struct device_attribute attrs[] = {
#ifdef CONFIG_HAS_EARLYSUSPEND
	__ATTR(full_pm_cycle, (S_IRUGO | S_IWUGO),
			synaptics_rmi4_full_pm_cycle_show,
			synaptics_rmi4_full_pm_cycle_store),
#endif
	__ATTR(reset, S_IWUGO,
			synaptics_rmi4_show_error,
			synaptics_rmi4_f01_reset_store),
	__ATTR(productinfo, S_IRUGO,
			synaptics_rmi4_f01_productinfo_show,
			synaptics_rmi4_store_error),
	__ATTR(buildid, S_IRUGO,
			synaptics_rmi4_f01_buildid_show,
			synaptics_rmi4_store_error),
	__ATTR(flashprog, S_IRUGO,
			synaptics_rmi4_f01_flashprog_show,
			synaptics_rmi4_store_error),
	__ATTR(0dbutton, (S_IRUGO | S_IWUGO),
			synaptics_rmi4_0dbutton_show,
			synaptics_rmi4_0dbutton_store),
	__ATTR(suspend, S_IWUGO,
			synaptics_rmi4_show_error,
			synaptics_rmi4_suspend_store),
	__ATTR(wake_gesture, (S_IRUGO | S_IWUGO),
			synaptics_rmi4_wake_gesture_show,
			synaptics_rmi4_wake_gesture_store),
	__ATTR(poll, S_IWUGO,
			synaptics_rmi4_show_error,
			synaptics_rmi4_poll_store),
	__ATTR(palm_size,  S_IRUGO | S_IWUSR | S_IWGRP,
			synaptics_palm_size_show,
			synaptics_palm_size_store),
	__ATTR(mode, S_IRUGO | S_IWUSR | S_IWGRP,
			synaptics_mode_show,
			synaptics_mode_store),
};

static struct kobj_attribute virtual_key_map_attr = {
	.attr = {
		.name = VIRTUAL_KEY_MAP_FILE_NAME,
		.mode = S_IRUGO,
	},
	.show = synaptics_rmi4_virtual_key_map_show,
};

static int extra_reg_addr(struct synaptics_rmi4_data *rmi4_data,
		const char *reg_name)
{
	int i;
	const struct synaptics_dsx_board_data *bdata =
			rmi4_data->hw_if->board_data;
	for (i = 0; i < bdata->extra_regs.size; i++)
		if (!strncmp(bdata->extra_regs.info[i].name,
				reg_name, strlen(reg_name)))
			return bdata->extra_regs.info[i].addr;
	return -EINVAL;
}

static ssize_t synaptics_palm_size_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_device_info *rmi;
	int f11_ctrl_58;

	if (!rmi4_data->has_large_obj_det)
		return -EPERM;
	rmi = &(rmi4_data->rmi4_mod_info);
	if (list_empty(&rmi->support_fn_list))
		return -ENODEV;

	f11_ctrl_58 = extra_reg_addr(rmi4_data, "f11_ctrl_58");

	list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
		if (fhandler->fn_number == SYNAPTICS_RMI4_F11) {
			unsigned char control58;
			int retval = synaptics_rmi4_reg_read(rmi4_data,
				f11_ctrl_58, &control58, sizeof(control58));
			if (retval <= 0)
				return -EIO;
			return scnprintf(buf, PAGE_SIZE, "%u\n",
					control58 & 0x7f);
		}
	}
	return -ENODEV;
}

static int f11_set_large_obj_size(struct synaptics_rmi4_data *rmi4_data)
{
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_device_info *rmi;
	int obj_size;

	if (!rmi4_data->has_large_obj_det)
		return -EPERM;

	obj_size = rmi4_data->hw_if->board_data->large_obj_size;
	dev_dbg(rmi4_data->pdev->dev.parent, "%s: obj_size=%u\n", __func__, obj_size);

	if (obj_size < 0 || (unsigned)obj_size == rmi4_data->large_obj_size)
		return 0;

	rmi = &(rmi4_data->rmi4_mod_info);
	if (list_empty(&rmi->support_fn_list))
		return -ENODEV;
	list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
		if (fhandler->fn_number == SYNAPTICS_RMI4_F11) {
			int retval;
			unsigned char control58;
			int f11_ctrl_58;

			f11_ctrl_58  = extra_reg_addr(rmi4_data, "f11_ctrl_58");
			retval = synaptics_rmi4_reg_read(rmi4_data,
				f11_ctrl_58, &control58, sizeof(control58));
			if (retval <= 0)
				goto err;
			control58 = (control58 & ~0x7f) | obj_size;
			retval = synaptics_rmi4_reg_write(rmi4_data,
				f11_ctrl_58, &control58, sizeof(control58));
			if (retval <= 0)
				goto err;
			dev_dbg(rmi4_data->pdev->dev.parent,
					"Large object size changed to %u\n",
					obj_size);
			return 0;
		}
	}
err:
	return -EIO;
}

static ssize_t synaptics_palm_size_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned long obj_size;
	int rc;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	if (kstrtoul(buf, 10, &obj_size) || obj_size > 0x7f)
		return -EINVAL;
	rmi4_data->hw_if->board_data->large_obj_size = obj_size;
	rc = f11_set_large_obj_size(rmi4_data);
	return rc ? rc : count;
}

#ifdef CONFIG_HAS_EARLYSUSPEND
static ssize_t synaptics_rmi4_full_pm_cycle_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%u\n",
			rmi4_data->full_pm_cycle);
}

static ssize_t synaptics_rmi4_full_pm_cycle_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned int input;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	if (sscanf(buf, "%u", &input) != 1)
		return -EINVAL;

	rmi4_data->full_pm_cycle = input > 0 ? 1 : 0;

	return count;
}
#endif

static ssize_t synaptics_rmi4_f01_reset_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	int retval;
	unsigned int reset;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	if (sscanf(buf, "%u", &reset) != 1)
		return -EINVAL;

	if (reset != 1)
		return -EINVAL;

	retval = synaptics_rmi4_reset_device(rmi4_data);
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to issue reset command, error = %d\n",
				__func__, retval);
		return retval;
	}

	return count;
}

static ssize_t synaptics_rmi4_f01_productinfo_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "0x%02x 0x%02x\n",
			(rmi4_data->rmi4_mod_info.product_info[0]),
			(rmi4_data->rmi4_mod_info.product_info[1]));
}

static ssize_t synaptics_rmi4_f01_buildid_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%u\n",
			rmi4_data->firmware_id);
}

static ssize_t synaptics_rmi4_f01_flashprog_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	int retval;
	struct synaptics_rmi4_f01_device_status device_status;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_data_base_addr,
			device_status.data,
			sizeof(device_status.data));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to read device status, error = %d\n",
				__func__, retval);
		return retval;
	}

	return snprintf(buf, PAGE_SIZE, "%u\n",
			device_status.flash_prog);
}

static ssize_t synaptics_rmi4_0dbutton_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%u\n",
			rmi4_data->button_0d_enabled);
}

static ssize_t synaptics_rmi4_0dbutton_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	int retval;
	unsigned int input;
	unsigned char ii;
	unsigned char intr_enable;
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
	struct synaptics_rmi4_device_info *rmi;

	rmi = &(rmi4_data->rmi4_mod_info);

	if (sscanf(buf, "%u", &input) != 1)
		return -EINVAL;

	input = input > 0 ? 1 : 0;

	if (rmi4_data->button_0d_enabled == input)
		return count;

	if (list_empty(&rmi->support_fn_list))
		return -ENODEV;

	list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
		if (fhandler->fn_number == SYNAPTICS_RMI4_F1A) {
			ii = fhandler->intr_reg_num;

			retval = synaptics_rmi4_reg_read(rmi4_data,
					rmi4_data->f01_ctrl_base_addr + 1 + ii,
					&intr_enable,
					sizeof(intr_enable));
			if (retval < 0)
				return retval;

			if (input == 1)
				intr_enable |= fhandler->intr_mask;
			else
				intr_enable &= ~fhandler->intr_mask;

			retval = synaptics_rmi4_reg_write(rmi4_data,
					rmi4_data->f01_ctrl_base_addr + 1 + ii,
					&intr_enable,
					sizeof(intr_enable));
			if (retval < 0)
				return retval;
		}
	}

	rmi4_data->button_0d_enabled = input;

	return count;
}

static ssize_t synaptics_rmi4_suspend_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned int input;

	if (sscanf(buf, "%u", &input) != 1)
		return -EINVAL;

	if (input == 1)
		synaptics_rmi4_suspend(dev);
	else if (input == 0)
		synaptics_rmi4_resume(dev);
	else
		return -EINVAL;

	return count;
}

static ssize_t synaptics_rmi4_wake_gesture_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	return snprintf(buf, PAGE_SIZE, "%u\n",
			rmi4_data->enable_wakeup_gesture);
}

static ssize_t synaptics_rmi4_wake_gesture_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned int input;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	if (sscanf(buf, "%u", &input) != 1)
		return -EINVAL;

	input = input > 0 ? 1 : 0;

	if (rmi4_data->f11_wakeup_gesture || rmi4_data->f12_wakeup_gesture)
		rmi4_data->enable_wakeup_gesture = input;

	return count;
}

static ssize_t synaptics_rmi4_virtual_key_map_show(struct kobject *kobj,
		struct kobj_attribute *attr, char *buf)
{
	int ii;
	int cnt;
	int count = 0;

	for (ii = 0; ii < vir_button_map->nbuttons; ii++) {
		cnt = snprintf(buf, PAGE_SIZE - count, "0x01:%d:%d:%d:%d:%d\n",
				vir_button_map->map[ii * 5 + 0],
				vir_button_map->map[ii * 5 + 1],
				vir_button_map->map[ii * 5 + 2],
				vir_button_map->map[ii * 5 + 3],
				vir_button_map->map[ii * 5 + 4]);
		buf += cnt;
		count += cnt;
	}

	return count;
}

static ssize_t synaptics_rmi4_poll_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned long t;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
	int rc;

	rc = kstrtoul(buf, 10, &t);
	if (rc)
		return rc;
	rmi4_data->poll = t;
	rmi4_data->ktime = ktime_set(0, t * 1000000L);
	return count;
}

static void wg_timer_cb(unsigned long data)
{
	struct synaptics_rmi4_data *rmi4_data =
					(struct synaptics_rmi4_data*)data;
	dev_dbg(rmi4_data->pdev->dev.parent, "%s: jiffies %ld.\n",
							__func__, jiffies);
	rmi4_data->wg_block_sleep = false;
}

static int synaptics_rmi4_f11_abs_report(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler)
{
	int retval;
	unsigned char touch_count = 0; /* number of touch points */
	unsigned char reg_index;
	unsigned char finger;
	unsigned char fingers_supported;
	unsigned char num_of_finger_status_regs;
	unsigned char finger_shift;
	unsigned char finger_status;
	unsigned char finger_status_reg[3];
	unsigned char detected_gestures;
	unsigned char data28;
	unsigned short data_addr;
	unsigned short data_offset;
	int x;
	int y;
	int wx;
	int wy;
	int temp;
	struct synaptics_rmi4_f11_data_1_5 data;
	struct synaptics_rmi4_f11_extra_data *extra_data;

	/*
	 * The number of finger status registers is determined by the
	 * maximum number of fingers supported - 2 bits per finger. So
	 * the number of finger status registers to read is:
	 * register_count = ceil(max_num_of_fingers / 4)
	 */
	fingers_supported = fhandler->num_of_data_points;
	num_of_finger_status_regs = (fingers_supported + 3) / 4;
	data_addr = fhandler->full_addr.data_base;

	extra_data = (struct synaptics_rmi4_f11_extra_data *)fhandler->extra;

	if (rmi4_data->wakeup_gesture_active) {
		if (rmi4_data->wg_sent) {
			dev_dbg(rmi4_data->pdev->dev.parent,
				"wg already sent\n");
			return 0;
		}
		retval = synaptics_rmi4_reg_read(rmi4_data,
				data_addr + extra_data->data38_offset,
				&detected_gestures,
				sizeof(detected_gestures));
		if (retval < 0)
			return 0;
		if (detected_gestures) {
			int key = rmi4_data->hw_if->board_data->wakeup_gest_key;

			dev_info(rmi4_data->pdev->dev.parent,
				"detected_gestures %d\n", detected_gestures);
			input_report_key(rmi4_data->input_dev, key, 1);
			input_sync(rmi4_data->input_dev);
			input_report_key(rmi4_data->input_dev, key, 0);
			input_sync(rmi4_data->input_dev);
			rmi4_data->wg_sent = true;
			rmi4_data->wg_block_until_no_finger = true;
			rmi4_data->wg_block_sleep = true;
			setup_timer(&rmi4_data->wg_timer, wg_timer_cb,
						(unsigned long)rmi4_data);
			if (mod_timer(&rmi4_data->wg_timer,
					jiffies + msecs_to_jiffies(
					BLOCK_PALM_DETECT_TIMEOUT_MS))) {
				dev_err(rmi4_data->pdev->dev.parent,
						"Failed to start timer\n");
				rmi4_data->wg_block_sleep = false;
			}
		}
		return 0;
	}

	retval = synaptics_rmi4_reg_read(rmi4_data,
			data_addr,
			finger_status_reg,
			num_of_finger_status_regs);
	if (retval < 0)
		return 0;

	if (rmi4_data->wg_block_until_no_finger) {
		finger = 0;
		finger_status = 0;
		while (finger < fingers_supported) {
			reg_index = finger / 4;
			finger_shift = (finger % 4) * 2;
			if ((finger_status_reg[reg_index] >> finger_shift) &
								MASK_2BIT)
				return 0;
			finger++;
		}
		rmi4_data->wg_block_until_no_finger = false;
	}

	mutex_lock(&(rmi4_data->rmi4_report_mutex));

	if (rmi4_data->has_large_obj_det && !rmi4_data->wg_block_sleep) {
		retval = synaptics_rmi4_reg_read(rmi4_data,
				rmi4_data->f11_data_28,
				&data28, sizeof(data28));
		if (retval >= 0) {
			dev_dbg(rmi4_data->pdev->dev.parent,
					"Large object present = %d",
					!!(data28 & 0x02));
			if (data28 & 0x02) {
				dev_info(rmi4_data->pdev->dev.parent,
					"%s: report palm!\n", __func__);
				input_report_key(rmi4_data->input_dev,
					KEY_SLEEP, 1);
				input_sync(rmi4_data->input_dev);
				rmi4_data->lo_detected = true;
			}
		}
	}

	for (finger = 0; finger < fingers_supported; finger++) {
		reg_index = finger / 4;
		finger_shift = (finger % 4) * 2;
		finger_status = (finger_status_reg[reg_index] >> finger_shift)
				& MASK_2BIT;

		/*
		 * Each 2-bit finger status field represents the following:
		 * 00 = finger not present
		 * 01 = finger present and data accurate
		 * 10 = finger present but data may be inaccurate
		 * 11 = reserved
		 */
#ifdef TYPE_B_PROTOCOL
		input_mt_slot(rmi4_data->input_dev, finger);
		input_mt_report_slot_state(rmi4_data->input_dev,
				MT_TOOL_FINGER, finger_status);
#endif

		if (finger_status) {
			data_offset = data_addr +
					num_of_finger_status_regs +
					(finger * sizeof(data.data));
			retval = synaptics_rmi4_reg_read(rmi4_data,
					data_offset,
					data.data,
					sizeof(data.data));
			if (retval < 0) {
				touch_count = 0;
				goto exit;
			}

			x = (data.x_position_11_4 << 4) | data.x_position_3_0;
			y = (data.y_position_11_4 << 4) | data.y_position_3_0;
			wx = data.wx;
			wy = data.wy;

			if (rmi4_data->hw_if->board_data->swap_axes) {
				temp = x;
				x = y;
				y = temp;
				temp = wx;
				wx = wy;
				wy = temp;
			}

			if (rmi4_data->hw_if->board_data->x_flip)
				x = rmi4_data->sensor_max_x - x;
			if (rmi4_data->hw_if->board_data->y_flip)
				y = rmi4_data->sensor_max_y - y;

			input_report_key(rmi4_data->input_dev,
					BTN_TOUCH, 1);
			input_report_key(rmi4_data->input_dev,
					BTN_TOOL_FINGER, 1);
			input_report_abs(rmi4_data->input_dev,
					ABS_MT_POSITION_X, x);
			input_report_abs(rmi4_data->input_dev,
					ABS_MT_POSITION_Y, y);
#ifdef REPORT_2D_W
			input_report_abs(rmi4_data->input_dev,
					ABS_MT_TOUCH_MAJOR, max(wx, wy));
			input_report_abs(rmi4_data->input_dev,
					ABS_MT_TOUCH_MINOR, min(wx, wy));
#endif
#ifndef TYPE_B_PROTOCOL
			input_mt_sync(rmi4_data->input_dev);
#endif

			dev_dbg(rmi4_data->pdev->dev.parent,
					"%s: Finger %d:\n"
					"status = 0x%02x\n"
					"x = %d\n"
					"y = %d\n"
					"wx = %d\n"
					"wy = %d\n",
					__func__, finger,
					finger_status,
					x, y, wx, wy);

			touch_count++;
		}
	}

	if (touch_count == 0) {
		input_report_key(rmi4_data->input_dev,
				BTN_TOUCH, 0);
		input_report_key(rmi4_data->input_dev,
				BTN_TOOL_FINGER, 0);
#ifndef TYPE_B_PROTOCOL
		input_mt_sync(rmi4_data->input_dev);
#endif
	}

	if (rmi4_data->lo_detected && !(data28 & 0x02)) {
		dev_info(rmi4_data->pdev->dev.parent,
				"%s: palm removed!\n", __func__);
		input_report_key(rmi4_data->input_dev,
				KEY_SLEEP, 0);
		rmi4_data->lo_detected = false;
	}

	input_sync(rmi4_data->input_dev);

exit:
	mutex_unlock(&(rmi4_data->rmi4_report_mutex));

	return touch_count;
}

static int synaptics_rmi4_f12_abs_report(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler)
{
	int retval;
	unsigned char touch_count = 0; /* number of touch points */
	unsigned char finger;
	unsigned char fingers_to_process;
	unsigned char finger_status;
	unsigned char size_of_2d_data;
	unsigned char detected_gestures;
	unsigned short data_addr;
	int x;
	int y;
	int wx;
	int wy;
	int temp;
	struct synaptics_rmi4_f12_extra_data *extra_data;
	struct synaptics_rmi4_f12_finger_data *data;
	struct synaptics_rmi4_f12_finger_data *finger_data;
#ifdef F12_DATA_15_WORKAROUND
	static unsigned char fingers_already_present;
#endif

	fingers_to_process = fhandler->num_of_data_points;
	data_addr = fhandler->full_addr.data_base;
	extra_data = (struct synaptics_rmi4_f12_extra_data *)fhandler->extra;
	size_of_2d_data = sizeof(struct synaptics_rmi4_f12_finger_data);

	if (rmi4_data->wakeup_gesture_active) {
		retval = synaptics_rmi4_reg_read(rmi4_data,
				data_addr + extra_data->data4_offset,
				&detected_gestures,
				sizeof(detected_gestures));
		if (retval < 0)
			return 0;

		if (detected_gestures) {
			int key = rmi4_data->hw_if->board_data->wakeup_gest_key;
			input_report_key(rmi4_data->input_dev, key, 1);
			input_sync(rmi4_data->input_dev);
			input_report_key(rmi4_data->input_dev, key, 0);
			input_sync(rmi4_data->input_dev);
			synaptics_rmi4_f12_wg(rmi4_data, false);
		}
		return 0;
	}

	/* Determine the total number of fingers to process */
	if (extra_data->data15_size) {
		retval = synaptics_rmi4_reg_read(rmi4_data,
				data_addr + extra_data->data15_offset,
				extra_data->data15_data,
				extra_data->data15_size);
		if (retval < 0)
			return 0;

		/* Start checking from the highest bit */
		temp = extra_data->data15_size - 1; /* Highest byte */
		finger = (fingers_to_process - 1) % 8; /* Highest bit */
		do {
			if (extra_data->data15_data[temp] & (1 << finger))
				break;

			if (finger) {
				finger--;
			} else {
				temp--; /* Move to the next lower byte */
				finger = 7;
			}

			fingers_to_process--;
		} while (fingers_to_process);

		dev_dbg(rmi4_data->pdev->dev.parent,
			"%s: Number of fingers to process = %d\n",
			__func__, fingers_to_process);
	}

#ifdef F12_DATA_15_WORKAROUND
	fingers_to_process = max(fingers_to_process, fingers_already_present);
#endif

	if (!fingers_to_process) {
		synaptics_rmi4_free_fingers(rmi4_data);
		return 0;
	}

	retval = synaptics_rmi4_reg_read(rmi4_data,
			data_addr + extra_data->data1_offset,
			(unsigned char *)fhandler->data,
			fingers_to_process * size_of_2d_data);
	if (retval < 0)
		return 0;

	data = (struct synaptics_rmi4_f12_finger_data *)fhandler->data;

	mutex_lock(&(rmi4_data->rmi4_report_mutex));

	for (finger = 0; finger < fingers_to_process; finger++) {
		finger_data = data + finger;
		finger_status = finger_data->object_type_and_status;

		switch (finger_status) {
		case F12_FINGER_STATUS:
		case F12_GLOVED_FINGER_STATUS:
#ifdef TYPE_B_PROTOCOL
			input_mt_slot(rmi4_data->input_dev, finger);
			input_mt_report_slot_state(rmi4_data->input_dev,
					MT_TOOL_FINGER, 1);
#endif

#ifdef F12_DATA_15_WORKAROUND
			fingers_already_present = finger + 1;
#endif

			x = (finger_data->x_msb << 8) | (finger_data->x_lsb);
			y = (finger_data->y_msb << 8) | (finger_data->y_lsb);
#ifdef REPORT_2D_W
			wx = finger_data->wx;
			wy = finger_data->wy;
#endif

			if (rmi4_data->hw_if->board_data->swap_axes) {
				temp = x;
				x = y;
				y = temp;
				temp = wx;
				wx = wy;
				wy = temp;
			}

			if (rmi4_data->hw_if->board_data->x_flip)
				x = rmi4_data->sensor_max_x - x;
			if (rmi4_data->hw_if->board_data->y_flip)
				y = rmi4_data->sensor_max_y - y;

			input_report_key(rmi4_data->input_dev,
					BTN_TOUCH, 1);
			input_report_key(rmi4_data->input_dev,
					BTN_TOOL_FINGER, 1);
			input_report_abs(rmi4_data->input_dev,
					ABS_MT_POSITION_X, x);
			input_report_abs(rmi4_data->input_dev,
					ABS_MT_POSITION_Y, y);
#ifdef REPORT_2D_W
			input_report_abs(rmi4_data->input_dev,
					ABS_MT_TOUCH_MAJOR, max(wx, wy));
			input_report_abs(rmi4_data->input_dev,
					ABS_MT_TOUCH_MINOR, min(wx, wy));
#endif
#ifndef TYPE_B_PROTOCOL
			input_mt_sync(rmi4_data->input_dev);
#endif

			dev_dbg(rmi4_data->pdev->dev.parent,
					"%s: Finger %d:\n"
					"status = 0x%02x\n"
					"x = %d\n"
					"y = %d\n"
					"wx = %d\n"
					"wy = %d\n",
					__func__, finger,
					finger_status,
					x, y, wx, wy);

			touch_count++;
			break;
		default:
#ifdef TYPE_B_PROTOCOL
			input_mt_slot(rmi4_data->input_dev, finger);
			input_mt_report_slot_state(rmi4_data->input_dev,
					MT_TOOL_FINGER, 0);
#endif
			break;
		}
	}

	if (touch_count == 0) {
#ifdef F12_DATA_15_WORKAROUND
		fingers_already_present = 0;
#endif
		input_report_key(rmi4_data->input_dev,
				BTN_TOUCH, 0);
		input_report_key(rmi4_data->input_dev,
				BTN_TOOL_FINGER, 0);
#ifndef TYPE_B_PROTOCOL
		input_mt_sync(rmi4_data->input_dev);
#endif
	}

	input_sync(rmi4_data->input_dev);

	mutex_unlock(&(rmi4_data->rmi4_report_mutex));

	return touch_count;
}

static void synaptics_rmi4_f1a_report(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler)
{
	int retval;
	unsigned char touch_count = 0;
	unsigned char button;
	unsigned char index;
	unsigned char shift;
	unsigned char status;
	unsigned char *data;
	unsigned short data_addr = fhandler->full_addr.data_base;
	struct synaptics_rmi4_f1a_handle *f1a = fhandler->data;
	static unsigned char do_once = 1;
	static bool current_status[MAX_NUMBER_OF_BUTTONS];
#ifdef NO_0D_WHILE_2D
	static bool before_2d_status[MAX_NUMBER_OF_BUTTONS];
	static bool while_2d_status[MAX_NUMBER_OF_BUTTONS];
#endif

	if (do_once) {
		memset(current_status, 0, sizeof(current_status));
#ifdef NO_0D_WHILE_2D
		memset(before_2d_status, 0, sizeof(before_2d_status));
		memset(while_2d_status, 0, sizeof(while_2d_status));
#endif
		do_once = 0;
	}

	retval = synaptics_rmi4_reg_read(rmi4_data,
			data_addr,
			f1a->button_data_buffer,
			f1a->button_bitmask_size);
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to read button data registers\n",
				__func__);
		return;
	}

	data = f1a->button_data_buffer;

	mutex_lock(&(rmi4_data->rmi4_report_mutex));

	for (button = 0; button < f1a->valid_button_count; button++) {
		index = button / 8;
		shift = button % 8;
		status = ((data[index] >> shift) & MASK_1BIT);

		if (current_status[button] == status)
			continue;
		else
			current_status[button] = status;

		dev_dbg(rmi4_data->pdev->dev.parent,
				"%s: Button %d (code %d) ->%d\n",
				__func__, button,
				f1a->button_map[button],
				status);
#ifdef NO_0D_WHILE_2D
		if (rmi4_data->fingers_on_2d == false) {
			if (status == 1) {
				before_2d_status[button] = 1;
			} else {
				if (while_2d_status[button] == 1) {
					while_2d_status[button] = 0;
					continue;
				} else {
					before_2d_status[button] = 0;
				}
			}
			touch_count++;
			input_report_key(rmi4_data->input_dev,
					f1a->button_map[button],
					status);
		} else {
			if (before_2d_status[button] == 1) {
				before_2d_status[button] = 0;
				touch_count++;
				input_report_key(rmi4_data->input_dev,
						f1a->button_map[button],
						status);
			} else {
				if (status == 1)
					while_2d_status[button] = 1;
				else
					while_2d_status[button] = 0;
			}
		}
#else
		touch_count++;
		input_report_key(rmi4_data->input_dev,
				f1a->button_map[button],
				status);
#endif
	}

	if (touch_count)
		input_sync(rmi4_data->input_dev);

	mutex_unlock(&(rmi4_data->rmi4_report_mutex));

	return;
}

static void synaptics_rmi4_report_touch(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler)
{
	unsigned char touch_count_2d;

	dev_dbg(rmi4_data->pdev->dev.parent,
			"%s: Function %02x reporting\n",
			__func__, fhandler->fn_number);

	switch (fhandler->fn_number) {
	case SYNAPTICS_RMI4_F11:
		touch_count_2d = synaptics_rmi4_f11_abs_report(rmi4_data,
				fhandler);

		if (touch_count_2d)
			rmi4_data->fingers_on_2d = true;
		else
			rmi4_data->fingers_on_2d = false;
		break;
	case SYNAPTICS_RMI4_F12:
		touch_count_2d = synaptics_rmi4_f12_abs_report(rmi4_data,
				fhandler);

		if (touch_count_2d)
			rmi4_data->fingers_on_2d = true;
		else
			rmi4_data->fingers_on_2d = false;
		break;
	case SYNAPTICS_RMI4_F1A:
		synaptics_rmi4_f1a_report(rmi4_data, fhandler);
		break;
	default:
		break;
	}

	return;
}

static void synaptics_rmi4_sensor_report(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	unsigned char data[MAX_INTR_REGISTERS + 1];
	unsigned char *intr = &data[1];
	struct synaptics_rmi4_f01_device_status status;
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;
	struct synaptics_rmi4_device_info *rmi;

	rmi = &(rmi4_data->rmi4_mod_info);

	/*
	 * Get interrupt status information from F01 Data1 register to
	 * determine the source(s) that are flagging the interrupt.
	 */
	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_data_base_addr,
			data,
			rmi4_data->num_of_intr_regs + 1);
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to read interrupt status\n",
				__func__);
		return;
	}

	status.data[0] = data[0];
	if (status.unconfigured && !status.flash_prog) {
		pr_notice("%s: spontaneous reset detected\n", __func__);
		retval = synaptics_rmi4_reinit_device(rmi4_data);
		if (retval < 0) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to reinit device\n",
					__func__);
		}
	}

	/*
	 * Traverse the function handler list and service the source(s)
	 * of the interrupt accordingly.
	 */
	if (!list_empty(&rmi->support_fn_list)) {
		list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
			if (fhandler->num_of_data_sources) {
				if (fhandler->intr_mask &
						intr[fhandler->intr_reg_num]) {
					synaptics_rmi4_report_touch(rmi4_data,
							fhandler);
				}
			}
		}
	}

	mutex_lock(&exp_data.mutex);
	if (!list_empty(&exp_data.list)) {
		list_for_each_entry(exp_fhandler, &exp_data.list, link) {
			if (!exp_fhandler->insert &&
					!exp_fhandler->remove &&
					(exp_fhandler->exp_fn->attn != NULL))
				exp_fhandler->exp_fn->attn(rmi4_data, intr[0]);
		}
	}
	mutex_unlock(&exp_data.mutex);

	return;
}

static irqreturn_t synaptics_rmi4_irq(int irq, void *data)
{
	struct synaptics_rmi4_data *rmi4_data = data;
	const struct synaptics_dsx_board_data *bdata =
			rmi4_data->hw_if->board_data;

	if (gpio_get_value(bdata->irq_gpio) != bdata->irq_on_state)
		goto exit;

	if (!rmi4_data->poll)
		synaptics_rmi4_sensor_report(rmi4_data);

exit:
	return IRQ_HANDLED;
}

static enum hrtimer_restart synaptics_rmi4_hrtimer(struct hrtimer *timer)
{
	struct synaptics_rmi4_data *rmi4_data =
		container_of(timer, struct synaptics_rmi4_data, hr_timer);

	if (rmi4_data->poll) {
		schedule_work(&rmi4_data->poll_work);
		hrtimer_start(&rmi4_data->hr_timer,
				rmi4_data->ktime, HRTIMER_MODE_REL);
	}
	return HRTIMER_NORESTART;
}

static void synaptics_rmi4_data_poll(struct work_struct *work)
{
	struct synaptics_rmi4_data *rmi4_data =
		container_of(work, struct synaptics_rmi4_data, poll_work);
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_device_info *rmi = &(rmi4_data->rmi4_mod_info);

	if (!list_empty(&rmi->support_fn_list)) {
		list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
			if (fhandler->num_of_data_sources) {
				synaptics_rmi4_report_touch(rmi4_data,
						fhandler);
			}
		}
	}
}

static int synaptics_rmi4_int_enable(struct synaptics_rmi4_data *rmi4_data,
		bool enable)
{
	int retval = 0;
	unsigned char ii;
	unsigned char zero = 0x00;
	unsigned char *intr_mask;
	unsigned short intr_addr;

	intr_mask = rmi4_data->intr_mask;

	for (ii = 0; ii < rmi4_data->num_of_intr_regs; ii++) {
		if (intr_mask[ii] != 0x00) {
			intr_addr = rmi4_data->f01_ctrl_base_addr + 1 + ii;
			if (enable) {
				retval = synaptics_rmi4_reg_write(rmi4_data,
						intr_addr,
						&(intr_mask[ii]),
						sizeof(intr_mask[ii]));
				if (retval < 0)
					return retval;
			} else {
				retval = synaptics_rmi4_reg_write(rmi4_data,
						intr_addr,
						&zero,
						sizeof(zero));
				if (retval < 0)
					return retval;
			}
		}
	}

	return retval;
}

static int synaptics_rmi4_irq_enable(struct synaptics_rmi4_data *rmi4_data,
		bool enable, bool attn_only)
{
	int retval = 0;
	const struct synaptics_dsx_board_data *bdata =
			rmi4_data->hw_if->board_data;

	if (attn_only) {
		retval = synaptics_rmi4_int_enable(rmi4_data, enable);
		return retval;
	}

	if (enable) {
		if (rmi4_data->irq_enabled)
			return retval;

		retval = synaptics_rmi4_int_enable(rmi4_data, false);
		if (retval < 0)
			return retval;

		/* Process and clear interrupts */
		synaptics_rmi4_sensor_report(rmi4_data);

		if (rmi4_data->enable_wakeup_gesture) {
			retval = request_threaded_irq(rmi4_data->irq, NULL,
				synaptics_rmi4_irq, bdata->irq_flags |
				IRQF_NO_SUSPEND,
				PLATFORM_DRIVER_NAME, rmi4_data);
			if (retval < 0)
				irq_set_irq_wake(rmi4_data->irq, 1);
		} else {
			retval = request_threaded_irq(rmi4_data->irq, NULL,
				synaptics_rmi4_irq, bdata->irq_flags,
				PLATFORM_DRIVER_NAME, rmi4_data);
		}

		if (retval < 0) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to create irq thread\n",
					__func__);
			return retval;
		}

		retval = synaptics_rmi4_int_enable(rmi4_data, true);
		if (retval < 0)
			return retval;

		rmi4_data->irq_enabled = true;
		if (rmi4_data->poll)
			hrtimer_start(&rmi4_data->hr_timer,
					rmi4_data->ktime, HRTIMER_MODE_REL);
	} else {
		if (rmi4_data->irq_enabled) {
			disable_irq(rmi4_data->irq);
			free_irq(rmi4_data->irq, rmi4_data);
			rmi4_data->irq_enabled = false;
			if (rmi4_data->poll) {
				hrtimer_cancel(&rmi4_data->hr_timer);
				cancel_work_sync(&rmi4_data->poll_work);
			}
		}
	}

	return retval;
}

static void synaptics_rmi4_set_intr_mask(struct synaptics_rmi4_fn *fhandler,
		struct synaptics_rmi4_fn_desc *fd,
		unsigned int intr_count)
{
	unsigned char ii;
	unsigned char intr_offset;

	fhandler->intr_reg_num = (intr_count + 7) / 8;
	if (fhandler->intr_reg_num != 0)
		fhandler->intr_reg_num -= 1;

	/* Set an enable bit for each data source */
	intr_offset = intr_count % 8;
	fhandler->intr_mask = 0;
	for (ii = intr_offset;
			ii < ((fd->intr_src_count & MASK_3BIT) +
			intr_offset);
			ii++)
		fhandler->intr_mask |= 1 << ii;

	return;
}

static int synaptics_rmi4_f01_init(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler,
		struct synaptics_rmi4_fn_desc *fd,
		unsigned int intr_count)
{
	fhandler->fn_number = fd->fn_number;
	fhandler->num_of_data_sources = fd->intr_src_count;
	fhandler->data = NULL;
	fhandler->extra = NULL;

	synaptics_rmi4_set_intr_mask(fhandler, fd, intr_count);

	rmi4_data->f01_query_base_addr = fd->query_base_addr;
	rmi4_data->f01_ctrl_base_addr = fd->ctrl_base_addr;
	rmi4_data->f01_data_base_addr = fd->data_base_addr;
	rmi4_data->f01_cmd_base_addr = fd->cmd_base_addr;

	return 0;
}

static int synaptics_rmi4_f11_init(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler,
		struct synaptics_rmi4_fn_desc *fd,
		unsigned int intr_count)
{
	int retval;
	unsigned char offset;
	unsigned char fingers_supported;
	struct synaptics_rmi4_f11_extra_data *extra_data;
	struct synaptics_rmi4_f11_query_0_5 query_0_5;
	struct synaptics_rmi4_f11_query_7_8 query_7_8;
	struct synaptics_rmi4_f11_query_9 query_9;
	struct synaptics_rmi4_f11_query_12 query_12;
	struct synaptics_rmi4_f11_query_27 query_27;
	struct synaptics_rmi4_f11_ctrl_6_9 control_6_9;
	unsigned char control58;
	int f11_ctrl_58;
	int f11_data_28;

	fhandler->fn_number = fd->fn_number;
	fhandler->num_of_data_sources = fd->intr_src_count;
	fhandler->extra = kmalloc(sizeof(*extra_data), GFP_KERNEL);
	extra_data = (struct synaptics_rmi4_f11_extra_data *)fhandler->extra;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.query_base,
			query_0_5.data,
			sizeof(query_0_5.data));
	if (retval < 0)
		return retval;

	/* Maximum number of fingers supported */
	if (query_0_5.num_of_fingers <= 4)
		fhandler->num_of_data_points = query_0_5.num_of_fingers + 1;
	else if (query_0_5.num_of_fingers == 5)
		fhandler->num_of_data_points = 10;

	f11_ctrl_58 = extra_reg_addr(rmi4_data, "f11_ctrl_58");
	f11_data_28 = extra_reg_addr(rmi4_data, "f11_data_28");
	rmi4_data->has_large_obj_det = f11_ctrl_58 != -EINVAL &&
			f11_data_28 != -EINVAL &&
			query_0_5.has_large_object_suppression;
	rmi4_data->f11_data_28 = f11_data_28;

	dev_dbg(rmi4_data->pdev->dev.parent,
			"Large object supported = %d (data_28 %x, ctrl_58 %x)",
			rmi4_data->has_large_obj_det,
			f11_data_28, f11_ctrl_58);

	rmi4_data->num_of_fingers = fhandler->num_of_data_points;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.ctrl_base + 6,
			control_6_9.data,
			sizeof(control_6_9.data));
	if (retval < 0)
		return retval;

	/* Maximum x and y */
	rmi4_data->sensor_max_x = control_6_9.sensor_max_x_pos_7_0 |
			(control_6_9.sensor_max_x_pos_11_8 << 8);
	rmi4_data->sensor_max_y = control_6_9.sensor_max_y_pos_7_0 |
			(control_6_9.sensor_max_y_pos_11_8 << 8);
	dev_dbg(rmi4_data->pdev->dev.parent,
			"%s: Function %02x max x = %d max y = %d\n",
			__func__, fhandler->fn_number,
			rmi4_data->sensor_max_x,
			rmi4_data->sensor_max_y);

	if (rmi4_data->has_large_obj_det) {
		retval = synaptics_rmi4_reg_read(rmi4_data, f11_ctrl_58,
				&control58, sizeof(control58));
		if (rmi4_data->hw_if->board_data->large_obj_size >= 0) {
			int los = rmi4_data->hw_if->board_data->large_obj_size;
			control58 = (control58 & ~0x7f) | los;
			retval = synaptics_rmi4_reg_write(rmi4_data,
				f11_ctrl_58, &control58, sizeof(control58));
		}
		rmi4_data->large_obj_size = control58 & 0x7f;
		dev_dbg(rmi4_data->pdev->dev.parent,
				"Large object size = %d\n",
				rmi4_data->large_obj_size);
		dev_dbg(rmi4_data->pdev->dev.parent,
				"Suppress ATTN = %d\n", !!(control58 & 0x80));
	}

	rmi4_data->max_touch_width = MAX_F11_TOUCH_WIDTH;

	synaptics_rmi4_set_intr_mask(fhandler, fd, intr_count);

	fhandler->data = NULL;

	offset = sizeof(query_0_5.data);

	/* query 6 */
	if (query_0_5.has_rel)
		offset += 1;

	/* queries 7 8 */
	if (query_0_5.has_gestures) {
		retval = synaptics_rmi4_reg_read(rmi4_data,
				fhandler->full_addr.query_base + offset,
				query_7_8.data,
				sizeof(query_7_8.data));
		if (retval < 0)
			return retval;

		offset += sizeof(query_7_8.data);
	}

	/* query 9 */
	if (query_0_5.has_query_9) {
		retval = synaptics_rmi4_reg_read(rmi4_data,
				fhandler->full_addr.query_base + offset,
				query_9.data,
				sizeof(query_9.data));
		if (retval < 0)
			return retval;

		offset += sizeof(query_9.data);
	}

	/* query 10 */
	if (query_0_5.has_gestures && query_7_8.has_touch_shapes)
		offset += 1;

	/* query 11 */
	if (query_0_5.has_query_11)
		offset += 1;

	/* query 12 */
	if (query_0_5.has_query_12) {
		retval = synaptics_rmi4_reg_read(rmi4_data,
				fhandler->full_addr.query_base + offset,
				query_12.data,
				sizeof(query_12.data));
		if (retval < 0)
			return retval;

		offset += sizeof(query_12.data);
	}

	/* query 13 */
	if (query_0_5.has_jitter_filter)
		offset += 1;

	/* query 14 */
	if (query_0_5.has_query_12 && query_12.has_general_information_2)
		offset += 1;

	/* queries 15 16 17 18 19 20 21 22 23 24 25 26*/
	if (query_0_5.has_query_12 && query_12.has_physical_properties)
		offset += 12;

	/* query 27 */
	if (query_0_5.has_query_27) {
		retval = synaptics_rmi4_reg_read(rmi4_data,
				fhandler->full_addr.query_base + offset,
				query_27.data,
				sizeof(query_27.data));
		if (retval < 0)
			return retval;

		rmi4_data->f11_wakeup_gesture = query_27.has_wakeup_gesture;
	}

	if (!rmi4_data->f11_wakeup_gesture)
		return retval;

	/* data 0 */
	fingers_supported = fhandler->num_of_data_points;
	offset = (fingers_supported + 3) / 4;

	/* data 1 2 3 4 5 */
	offset += 5 * fingers_supported;

	/* data 6 7 */
	if (query_0_5.has_rel)
		offset += 2 * fingers_supported;

	/* data 8 */
	if (query_0_5.has_gestures && query_7_8.data[0])
		offset += 1;

	/* data 9 */
	if (query_0_5.has_gestures && (query_7_8.data[0] || query_7_8.data[1]))
		offset += 1;

	/* data 10 */
	if (query_0_5.has_gestures &&
			(query_7_8.has_pinch || query_7_8.has_flick))
		offset += 1;

	/* data 11 12 */
	if (query_0_5.has_gestures &&
			(query_7_8.has_flick || query_7_8.has_rotate))
		offset += 2;

	/* data 13 */
	if (query_0_5.has_gestures && query_7_8.has_touch_shapes)
		offset += (fingers_supported + 3) / 4;

	/* data 14 15 */
	if (query_0_5.has_gestures &&
			(query_7_8.has_scroll_zones ||
			query_7_8.has_multi_finger_scroll ||
			query_7_8.has_chiral_scroll))
		offset += 2;

	/* data 16 17 */
	if (query_0_5.has_gestures &&
			(query_7_8.has_scroll_zones &&
			query_7_8.individual_scroll_zones))
		offset += 2;

	/* data 18 19 20 21 22 23 24 25 26 27 */
	if (query_0_5.has_query_9 && query_9.has_contact_geometry)
		offset += 10 * fingers_supported;

	/* data 28 */
	if (query_0_5.has_bending_correction ||
			query_0_5.has_large_object_suppression)
		offset += 1;

	/* data 29 30 31 */
	if (query_0_5.has_query_9 && query_9.has_pen_hover_discrimination)
		offset += 3;

	/* data 32 */
	if (query_0_5.has_query_12 &&
			query_12.has_small_object_detection_tuning)
		offset += 1;

	/* data 33 34 */
	if (query_0_5.has_query_27 && query_27.f11_query27_b0)
		offset += 2;

	/* data 35 */
	if (query_0_5.has_query_12 && query_12.has_8bit_w)
		offset += fingers_supported;

	/* data 36 */
	if (query_0_5.has_bending_correction)
		offset += 1;

	/* data 37 */
	if (query_0_5.has_query_27 && query_27.has_data_37)
		offset += 1;

	/* data 38 */
	if (query_0_5.has_query_27 && query_27.has_wakeup_gesture)
		extra_data->data38_offset = offset;

	return retval;
}

static int synaptics_rmi4_f12_set_enables(struct synaptics_rmi4_data *rmi4_data,
		unsigned short ctrl28)
{
	int retval;
	static unsigned short ctrl_28_address;

	if (ctrl28)
		ctrl_28_address = ctrl28;

	retval = synaptics_rmi4_reg_write(rmi4_data,
			ctrl_28_address,
			&rmi4_data->report_enable,
			sizeof(rmi4_data->report_enable));
	if (retval < 0)
		return retval;

	return retval;
}

static int synaptics_rmi4_f12_init(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler,
		struct synaptics_rmi4_fn_desc *fd,
		unsigned int intr_count)
{
	int retval;
	unsigned char size_of_2d_data;
	unsigned char size_of_query8;
	unsigned char ctrl_8_offset;
	unsigned char ctrl_20_offset;
	unsigned char ctrl_23_offset;
	unsigned char ctrl_28_offset;
	unsigned char num_of_fingers;
	struct synaptics_rmi4_f12_extra_data *extra_data;
	struct synaptics_rmi4_f12_query_5 query_5;
	struct synaptics_rmi4_f12_query_8 query_8;
	struct synaptics_rmi4_f12_ctrl_8 ctrl_8;
	struct synaptics_rmi4_f12_ctrl_23 ctrl_23;

	fhandler->fn_number = fd->fn_number;
	fhandler->num_of_data_sources = fd->intr_src_count;
	fhandler->extra = kmalloc(sizeof(*extra_data), GFP_KERNEL);
	extra_data = (struct synaptics_rmi4_f12_extra_data *)fhandler->extra;
	size_of_2d_data = sizeof(struct synaptics_rmi4_f12_finger_data);

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.query_base + 5,
			query_5.data,
			sizeof(query_5.data));
	if (retval < 0)
		return retval;

	ctrl_8_offset = query_5.ctrl0_is_present +
			query_5.ctrl1_is_present +
			query_5.ctrl2_is_present +
			query_5.ctrl3_is_present +
			query_5.ctrl4_is_present +
			query_5.ctrl5_is_present +
			query_5.ctrl6_is_present +
			query_5.ctrl7_is_present;

	ctrl_20_offset = ctrl_8_offset +
			query_5.ctrl8_is_present +
			query_5.ctrl9_is_present +
			query_5.ctrl10_is_present +
			query_5.ctrl11_is_present +
			query_5.ctrl12_is_present +
			query_5.ctrl13_is_present +
			query_5.ctrl14_is_present +
			query_5.ctrl15_is_present +
			query_5.ctrl16_is_present +
			query_5.ctrl17_is_present +
			query_5.ctrl18_is_present +
			query_5.ctrl19_is_present;

	ctrl_23_offset = ctrl_20_offset +
			query_5.ctrl20_is_present +
			query_5.ctrl21_is_present +
			query_5.ctrl22_is_present;

	ctrl_28_offset = ctrl_23_offset +
			query_5.ctrl23_is_present +
			query_5.ctrl24_is_present +
			query_5.ctrl25_is_present +
			query_5.ctrl26_is_present +
			query_5.ctrl27_is_present;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.ctrl_base + ctrl_23_offset,
			ctrl_23.data,
			sizeof(ctrl_23.data));
	if (retval < 0)
		return retval;

	/* Maximum number of fingers supported */
	fhandler->num_of_data_points = min(ctrl_23.max_reported_objects,
			(unsigned char)F12_FINGERS_TO_SUPPORT);

	num_of_fingers = fhandler->num_of_data_points;
	rmi4_data->num_of_fingers = num_of_fingers;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.query_base + 7,
			&size_of_query8,
			sizeof(size_of_query8));
	if (retval < 0)
		return retval;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.query_base + 8,
			query_8.data,
			size_of_query8);
	if (retval < 0)
		return retval;

	/* Determine the presence of the Data0 register */
	extra_data->data1_offset = query_8.data0_is_present;

	if ((size_of_query8 >= 3) && (query_8.data15_is_present)) {
		extra_data->data15_offset = query_8.data0_is_present +
				query_8.data1_is_present +
				query_8.data2_is_present +
				query_8.data3_is_present +
				query_8.data4_is_present +
				query_8.data5_is_present +
				query_8.data6_is_present +
				query_8.data7_is_present +
				query_8.data8_is_present +
				query_8.data9_is_present +
				query_8.data10_is_present +
				query_8.data11_is_present +
				query_8.data12_is_present +
				query_8.data13_is_present +
				query_8.data14_is_present;
		extra_data->data15_size = (num_of_fingers + 7) / 8;
	} else {
		extra_data->data15_size = 0;
	}

	rmi4_data->report_enable = RPT_DEFAULT;
#ifdef REPORT_2D_Z
	rmi4_data->report_enable |= RPT_Z;
#endif
#ifdef REPORT_2D_W
	rmi4_data->report_enable |= (RPT_WX | RPT_WY);
#endif

	retval = synaptics_rmi4_f12_set_enables(rmi4_data,
			fhandler->full_addr.ctrl_base + ctrl_28_offset);
	if (retval < 0)
		return retval;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.ctrl_base + ctrl_8_offset,
			ctrl_8.data,
			sizeof(ctrl_8.data));
	if (retval < 0)
		return retval;

	/* Maximum x and y */
	rmi4_data->sensor_max_x =
			((unsigned short)ctrl_8.max_x_coord_lsb << 0) |
			((unsigned short)ctrl_8.max_x_coord_msb << 8);
	rmi4_data->sensor_max_y =
			((unsigned short)ctrl_8.max_y_coord_lsb << 0) |
			((unsigned short)ctrl_8.max_y_coord_msb << 8);
	dev_dbg(rmi4_data->pdev->dev.parent,
			"%s: Function %02x max x = %d max y = %d\n",
			__func__, fhandler->fn_number,
			rmi4_data->sensor_max_x,
			rmi4_data->sensor_max_y);

	rmi4_data->num_of_rx = ctrl_8.num_of_rx;
	rmi4_data->num_of_tx = ctrl_8.num_of_tx;
	rmi4_data->max_touch_width = max(rmi4_data->num_of_rx,
			rmi4_data->num_of_tx);

	rmi4_data->f12_wakeup_gesture = query_5.ctrl27_is_present;
	if (rmi4_data->f12_wakeup_gesture) {
		extra_data->ctrl20_offset = ctrl_20_offset;
		extra_data->data4_offset = query_8.data0_is_present +
				query_8.data1_is_present +
				query_8.data2_is_present +
				query_8.data3_is_present;
	}

	synaptics_rmi4_set_intr_mask(fhandler, fd, intr_count);

	/* Allocate memory for finger data storage space */
	fhandler->data_size = num_of_fingers * size_of_2d_data;
	fhandler->data = kmalloc(fhandler->data_size, GFP_KERNEL);

	return retval;
}

static int synaptics_rmi4_f1a_alloc_mem(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler)
{
	int retval;
	struct synaptics_rmi4_f1a_handle *f1a;

	f1a = kzalloc(sizeof(*f1a), GFP_KERNEL);
	if (!f1a) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to alloc mem for function handle\n",
				__func__);
		return -ENOMEM;
	}

	fhandler->data = (void *)f1a;
	fhandler->extra = NULL;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.query_base,
			f1a->button_query.data,
			sizeof(f1a->button_query.data));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to read query registers\n",
				__func__);
		return retval;
	}

	f1a->max_count = f1a->button_query.max_button_count + 1;

	f1a->button_control.txrx_map = kzalloc(f1a->max_count * 2, GFP_KERNEL);
	if (!f1a->button_control.txrx_map) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to alloc mem for tx rx mapping\n",
				__func__);
		return -ENOMEM;
	}

	f1a->button_bitmask_size = (f1a->max_count + 7) / 8;

	f1a->button_data_buffer = kcalloc(f1a->button_bitmask_size,
			sizeof(*(f1a->button_data_buffer)), GFP_KERNEL);
	if (!f1a->button_data_buffer) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to alloc mem for data buffer\n",
				__func__);
		return -ENOMEM;
	}

	f1a->button_map = kcalloc(f1a->max_count,
			sizeof(*(f1a->button_map)), GFP_KERNEL);
	if (!f1a->button_map) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to alloc mem for button map\n",
				__func__);
		return -ENOMEM;
	}

	return 0;
}

static int synaptics_rmi4_f1a_button_map(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler)
{
	int retval;
	unsigned char ii;
	unsigned char mapping_offset = 0;
	struct synaptics_rmi4_f1a_handle *f1a = fhandler->data;
	const struct synaptics_dsx_board_data *bdata =
			rmi4_data->hw_if->board_data;

	mapping_offset = f1a->button_query.has_general_control +
			f1a->button_query.has_interrupt_enable +
			f1a->button_query.has_multibutton_select;

	if (f1a->button_query.has_tx_rx_map) {
		retval = synaptics_rmi4_reg_read(rmi4_data,
				fhandler->full_addr.ctrl_base + mapping_offset,
				f1a->button_control.txrx_map,
				f1a->max_count * 2);
		if (retval < 0) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to read tx rx mapping\n",
					__func__);
			return retval;
		}

		rmi4_data->button_txrx_mapping = f1a->button_control.txrx_map;
	}

	if (!bdata->cap_button_map) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: cap_button_map is NULL in board file\n",
				__func__);
		return -ENODEV;
	} else if (!bdata->cap_button_map->map) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Button map is missing in board file\n",
				__func__);
		return -ENODEV;
	} else {
		if (bdata->cap_button_map->nbuttons != f1a->max_count) {
			f1a->valid_button_count = min(f1a->max_count,
					bdata->cap_button_map->nbuttons);
		} else {
			f1a->valid_button_count = f1a->max_count;
		}

		for (ii = 0; ii < f1a->valid_button_count; ii++)
			f1a->button_map[ii] = bdata->cap_button_map->map[ii];
	}

	return 0;
}

static void synaptics_rmi4_f1a_kfree(struct synaptics_rmi4_fn *fhandler)
{
	struct synaptics_rmi4_f1a_handle *f1a = fhandler->data;

	if (f1a) {
		kfree(f1a->button_control.txrx_map);
		kfree(f1a->button_data_buffer);
		kfree(f1a->button_map);
		kfree(f1a);
		fhandler->data = NULL;
	}

	return;
}

static int synaptics_rmi4_f1a_init(struct synaptics_rmi4_data *rmi4_data,
		struct synaptics_rmi4_fn *fhandler,
		struct synaptics_rmi4_fn_desc *fd,
		unsigned int intr_count)
{
	int retval;

	fhandler->fn_number = fd->fn_number;
	fhandler->num_of_data_sources = fd->intr_src_count;

	synaptics_rmi4_set_intr_mask(fhandler, fd, intr_count);

	retval = synaptics_rmi4_f1a_alloc_mem(rmi4_data, fhandler);
	if (retval < 0)
		goto error_exit;

	retval = synaptics_rmi4_f1a_button_map(rmi4_data, fhandler);
	if (retval < 0)
		goto error_exit;

	rmi4_data->button_0d_enabled = 1;

	return 0;

error_exit:
	synaptics_rmi4_f1a_kfree(fhandler);

	return retval;
}

static void synaptics_rmi4_empty_fn_list(struct synaptics_rmi4_data *rmi4_data)
{
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_fn *fhandler_temp;
	struct synaptics_rmi4_device_info *rmi;

	rmi = &(rmi4_data->rmi4_mod_info);

	if (!list_empty(&rmi->support_fn_list)) {
		list_for_each_entry_safe(fhandler,
				fhandler_temp,
				&rmi->support_fn_list,
				link) {
			if (fhandler->fn_number == SYNAPTICS_RMI4_F1A) {
				synaptics_rmi4_f1a_kfree(fhandler);
			} else {
				kfree(fhandler->extra);
				kfree(fhandler->data);
			}
			list_del(&fhandler->link);
			kfree(fhandler);
		}
	}
	INIT_LIST_HEAD(&rmi->support_fn_list);

	return;
}

static int synaptics_rmi4_check_status(struct synaptics_rmi4_data *rmi4_data,
		bool *was_in_bl_mode)
{
	int retval;
	int timeout = CHECK_STATUS_TIMEOUT_MS;
	unsigned char intr_status;
	struct synaptics_rmi4_f01_device_status status;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_data_base_addr,
			status.data,
			sizeof(status.data));
	if (retval < 0)
		return retval;

	while (status.status_code == STATUS_CRC_IN_PROGRESS) {
		if (timeout > 0)
			msleep(20);
		else
			return -1;

		retval = synaptics_rmi4_reg_read(rmi4_data,
				rmi4_data->f01_data_base_addr,
				status.data,
				sizeof(status.data));
		if (retval < 0)
			return retval;

		timeout -= 20;
	}

	if (timeout != CHECK_STATUS_TIMEOUT_MS)
		*was_in_bl_mode = true;

	if (status.flash_prog == 1) {
		rmi4_data->flash_prog_mode = true;
		pr_notice("%s: In flash prog mode, status = 0x%02x\n",
				__func__,
				status.status_code);
	} else {
		rmi4_data->flash_prog_mode = false;
	}

	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_data_base_addr + 1,
			&intr_status,
			sizeof(intr_status));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to read interrupt status\n",
				__func__);
		return retval;
	}

	return 0;
}

static void synaptics_rmi4_set_configured(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	unsigned char device_ctrl;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_ctrl_base_addr,
			&device_ctrl,
			sizeof(device_ctrl));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to set configured\n",
				__func__);
		return;
	}

	rmi4_data->no_sleep_setting = device_ctrl & NO_SLEEP_ON;
	device_ctrl |= CONFIGURED;

	retval = synaptics_rmi4_reg_write(rmi4_data,
			rmi4_data->f01_ctrl_base_addr,
			&device_ctrl,
			sizeof(device_ctrl));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to set configured\n",
				__func__);
	}

	return;
}

static int synaptics_rmi4_alloc_fh(struct synaptics_rmi4_fn **fhandler,
		struct synaptics_rmi4_fn_desc *rmi_fd, int page_number)
{
	*fhandler = kmalloc(sizeof(**fhandler), GFP_KERNEL);
	if (!(*fhandler))
		return -ENOMEM;

	(*fhandler)->full_addr.data_base =
			(rmi_fd->data_base_addr |
			(page_number << 8));
	(*fhandler)->full_addr.ctrl_base =
			(rmi_fd->ctrl_base_addr |
			(page_number << 8));
	(*fhandler)->full_addr.cmd_base =
			(rmi_fd->cmd_base_addr |
			(page_number << 8));
	(*fhandler)->full_addr.query_base =
			(rmi_fd->query_base_addr |
			(page_number << 8));

	return 0;
}

static int synaptics_rmi4_query_device(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	unsigned char page_number;
	unsigned char intr_count;
	unsigned char f01_query[F01_STD_QUERY_LEN];
	unsigned short pdt_entry_addr;
	bool f01found;
	bool was_in_bl_mode;
	struct synaptics_rmi4_fn_desc rmi_fd;
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_device_info *rmi;

	rmi = &(rmi4_data->rmi4_mod_info);

rescan_pdt:
	f01found = false;
	was_in_bl_mode = false;
	intr_count = 0;
	INIT_LIST_HEAD(&rmi->support_fn_list);

	/* Scan the page description tables of the pages to service */
	for (page_number = 0; page_number < PAGES_TO_SERVICE; page_number++) {
		for (pdt_entry_addr = PDT_START; pdt_entry_addr > PDT_END;
				pdt_entry_addr -= PDT_ENTRY_SIZE) {
			pdt_entry_addr |= (page_number << 8);

			retval = synaptics_rmi4_reg_read(rmi4_data,
					pdt_entry_addr,
					(unsigned char *)&rmi_fd,
					sizeof(rmi_fd));
			if (retval < 0)
				return retval;

			pdt_entry_addr &= ~(MASK_8BIT << 8);

			fhandler = NULL;

			if (rmi_fd.fn_number == 0) {
				dev_dbg(rmi4_data->pdev->dev.parent,
						"%s: Reached end of PDT\n",
						__func__);
				break;
			}

			dev_dbg(rmi4_data->pdev->dev.parent,
					"%s: F%02x found (page %d)\n",
					__func__, rmi_fd.fn_number,
					page_number);

			switch (rmi_fd.fn_number) {
			case SYNAPTICS_RMI4_F01:
				if (rmi_fd.intr_src_count == 0)
					break;

				f01found = true;

				retval = synaptics_rmi4_alloc_fh(&fhandler,
						&rmi_fd, page_number);
				if (retval < 0) {
					dev_err(rmi4_data->pdev->dev.parent,
							"%s: Failed to alloc for F%d\n",
							__func__,
							rmi_fd.fn_number);
					return retval;
				}

				retval = synaptics_rmi4_f01_init(rmi4_data,
						fhandler, &rmi_fd, intr_count);
				if (retval < 0)
					return retval;

				retval = synaptics_rmi4_check_status(rmi4_data,
						&was_in_bl_mode);
				if (retval < 0) {
					dev_err(rmi4_data->pdev->dev.parent,
							"%s: Failed to check status\n",
							__func__);
					return retval;
				}

				if (was_in_bl_mode) {
					kfree(fhandler);
					fhandler = NULL;
					goto rescan_pdt;
				}

				if (rmi4_data->flash_prog_mode)
					goto flash_prog_mode;

				break;
			case SYNAPTICS_RMI4_F11:
				if (rmi_fd.intr_src_count == 0)
					break;

				retval = synaptics_rmi4_alloc_fh(&fhandler,
						&rmi_fd, page_number);
				if (retval < 0) {
					dev_err(rmi4_data->pdev->dev.parent,
							"%s: Failed to alloc for F%d\n",
							__func__,
							rmi_fd.fn_number);
					return retval;
				}

				retval = synaptics_rmi4_f11_init(rmi4_data,
						fhandler, &rmi_fd, intr_count);
				if (retval < 0)
					return retval;
				break;
			case SYNAPTICS_RMI4_F12:
				if (rmi_fd.intr_src_count == 0)
					break;

				retval = synaptics_rmi4_alloc_fh(&fhandler,
						&rmi_fd, page_number);
				if (retval < 0) {
					dev_err(rmi4_data->pdev->dev.parent,
							"%s: Failed to alloc for F%d\n",
							__func__,
							rmi_fd.fn_number);
					return retval;
				}

				retval = synaptics_rmi4_f12_init(rmi4_data,
						fhandler, &rmi_fd, intr_count);
				if (retval < 0)
					return retval;
				break;
			case SYNAPTICS_RMI4_F1A:
				if (rmi_fd.intr_src_count == 0)
					break;

				retval = synaptics_rmi4_alloc_fh(&fhandler,
						&rmi_fd, page_number);
				if (retval < 0) {
					dev_err(rmi4_data->pdev->dev.parent,
							"%s: Failed to alloc for F%d\n",
							__func__,
							rmi_fd.fn_number);
					return retval;
				}

				retval = synaptics_rmi4_f1a_init(rmi4_data,
						fhandler, &rmi_fd, intr_count);
				if (retval < 0) {
#ifdef IGNORE_FN_INIT_FAILURE
					kfree(fhandler);
					fhandler = NULL;
#else
					return retval;
#endif
				}
				break;
			}

			/* Accumulate the interrupt count */
			intr_count += (rmi_fd.intr_src_count & MASK_3BIT);

			if (fhandler && rmi_fd.intr_src_count) {
				list_add_tail(&fhandler->link,
						&rmi->support_fn_list);
			}
		}
	}

	if (!f01found) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to find F01\n",
				__func__);
		return -EINVAL;
	}

flash_prog_mode:
	rmi4_data->num_of_intr_regs = (intr_count + 7) / 8;
	dev_dbg(rmi4_data->pdev->dev.parent,
			"%s: Number of interrupt registers = %d\n",
			__func__, rmi4_data->num_of_intr_regs);

	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_query_base_addr,
			f01_query,
			sizeof(f01_query));
	if (retval < 0)
		return retval;

	/* RMI Version 4.0 currently supported */
	rmi->version_major = 4;
	rmi->version_minor = 0;

	rmi->manufacturer_id = f01_query[0];
	rmi->product_props = f01_query[1];
	rmi->product_info[0] = f01_query[2];
	rmi->product_info[1] = f01_query[3];
	memcpy(rmi->product_id_string, &f01_query[11], 10);

	if (rmi->manufacturer_id != 1) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Non-Synaptics device found, manufacturer ID = %d\n",
				__func__, rmi->manufacturer_id);
	}

	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_query_base_addr + F01_BUID_ID_OFFSET,
			rmi->build_id,
			sizeof(rmi->build_id));
	if (retval < 0)
		return retval;

	rmi4_data->firmware_id = (unsigned int)rmi->build_id[0] +
			(unsigned int)rmi->build_id[1] * 0x100 +
			(unsigned int)rmi->build_id[2] * 0x10000;

	memset(rmi4_data->intr_mask, 0x00, sizeof(rmi4_data->intr_mask));

	/*
	 * Map out the interrupt bit masks for the interrupt sources
	 * from the registered function handlers.
	 */
	if (!list_empty(&rmi->support_fn_list)) {
		list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
			if (fhandler->num_of_data_sources) {
				rmi4_data->intr_mask[fhandler->intr_reg_num] |=
						fhandler->intr_mask;
			}
		}
	}

	if (rmi4_data->f11_wakeup_gesture || rmi4_data->f12_wakeup_gesture) {
		const struct synaptics_dsx_board_data *bdata =
				rmi4_data->hw_if->board_data;
		rmi4_data->enable_wakeup_gesture = bdata->wakeup_gest_key > 0;
	} else {
		rmi4_data->enable_wakeup_gesture = false;
	}
	if (rmi4_data->enable_wakeup_gesture)
		device_init_wakeup(rmi4_data->pdev->dev.parent, 1);

	synaptics_rmi4_set_configured(rmi4_data);

	return 0;
}

static int synaptics_rmi4_gpio_setup(int gpio, bool config, int dir, int state)
{
	int retval = 0;
	unsigned char buf[16];

	if (config) {
		snprintf(buf, PAGE_SIZE, "dsx_gpio_%u\n", gpio);

		retval = gpio_request(gpio, buf);
		if (retval) {
			pr_err("%s: Failed to get gpio %d (code: %d)",
					__func__, gpio, retval);
			return retval;
		}

		if (dir == 0)
			retval = gpio_direction_input(gpio);
		else
			retval = gpio_direction_output(gpio, state);
		if (retval) {
			pr_err("%s: Failed to set gpio %d direction",
					__func__, gpio);
			return retval;
		}
	} else {
		gpio_free(gpio);
	}

	return retval;
}

static void synaptics_rmi4_set_params(struct synaptics_rmi4_data *rmi4_data)
{
	unsigned char ii;
	struct synaptics_rmi4_f1a_handle *f1a;
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_device_info *rmi;

	rmi = &(rmi4_data->rmi4_mod_info);

	input_set_abs_params(rmi4_data->input_dev,
			ABS_MT_POSITION_X, 0,
			rmi4_data->sensor_max_x, 0, 0);
	input_set_abs_params(rmi4_data->input_dev,
			ABS_MT_POSITION_Y, 0,
			rmi4_data->sensor_max_y, 0, 0);
#ifdef REPORT_2D_W
	input_set_abs_params(rmi4_data->input_dev,
			ABS_MT_TOUCH_MAJOR, 0,
			rmi4_data->max_touch_width, 0, 0);
	input_set_abs_params(rmi4_data->input_dev,
			ABS_MT_TOUCH_MINOR, 0,
			rmi4_data->max_touch_width, 0, 0);
#endif

#ifdef TYPE_B_PROTOCOL
	input_mt_init_slots(rmi4_data->input_dev,
			rmi4_data->num_of_fingers, INPUT_MT_DIRECT);
#endif

	f1a = NULL;
	if (!list_empty(&rmi->support_fn_list)) {
		list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
			if (fhandler->fn_number == SYNAPTICS_RMI4_F1A)
				f1a = fhandler->data;
		}
	}

	if (f1a) {
		for (ii = 0; ii < f1a->valid_button_count; ii++) {
			set_bit(f1a->button_map[ii],
					rmi4_data->input_dev->keybit);
			input_set_capability(rmi4_data->input_dev,
					EV_KEY, f1a->button_map[ii]);
		}
	}

	if (vir_button_map->nbuttons) {
		for (ii = 0; ii < vir_button_map->nbuttons; ii++) {
			set_bit(vir_button_map->map[ii * 5],
					rmi4_data->input_dev->keybit);
			input_set_capability(rmi4_data->input_dev,
					EV_KEY, vir_button_map->map[ii * 5]);
		}
	}

	if (rmi4_data->f11_wakeup_gesture || rmi4_data->f12_wakeup_gesture) {
		int key = rmi4_data->hw_if->board_data->wakeup_gest_key;
		if (key > 0)
			input_set_capability(rmi4_data->input_dev, EV_KEY, key);
	}

	return;
}

static int synaptics_rmi4_set_input_dev(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	int temp;
	const struct synaptics_dsx_board_data *bdata =
				rmi4_data->hw_if->board_data;

	rmi4_data->input_dev = input_allocate_device();
	if (rmi4_data->input_dev == NULL) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to allocate input device\n",
				__func__);
		retval = -ENOMEM;
		goto err_input_device;
	}

	retval = synaptics_rmi4_query_device(rmi4_data);
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to query device\n",
				__func__);
		goto err_query_device;
	}

	rmi4_data->input_dev->name = PLATFORM_DRIVER_NAME;
	rmi4_data->input_dev->phys = INPUT_PHYS_NAME;
	rmi4_data->input_dev->id.product = SYNAPTICS_DSX_DRIVER_PRODUCT;
	rmi4_data->input_dev->id.version = SYNAPTICS_DSX_DRIVER_VERSION;
	input_set_drvdata(rmi4_data->input_dev, rmi4_data);

	set_bit(EV_SYN, rmi4_data->input_dev->evbit);
	set_bit(EV_KEY, rmi4_data->input_dev->evbit);
	set_bit(EV_ABS, rmi4_data->input_dev->evbit);
	set_bit(BTN_TOUCH, rmi4_data->input_dev->keybit);
	set_bit(BTN_TOOL_FINGER, rmi4_data->input_dev->keybit);
	if (rmi4_data->has_large_obj_det)
		set_bit(KEY_SLEEP, rmi4_data->input_dev->keybit);
#ifdef INPUT_PROP_DIRECT
	set_bit(INPUT_PROP_DIRECT, rmi4_data->input_dev->propbit);
#endif

	if (bdata->swap_axes) {
		temp = rmi4_data->sensor_max_x;
		rmi4_data->sensor_max_x = rmi4_data->sensor_max_y;
		rmi4_data->sensor_max_y = temp;
	}

	if (bdata->max_y_for_2d >= 0)
		rmi4_data->sensor_max_y = bdata->max_y_for_2d;

	synaptics_rmi4_set_params(rmi4_data);

	retval = input_register_device(rmi4_data->input_dev);
	if (retval) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to register input device\n",
				__func__);
		goto err_register_input;
	}

	return 0;

err_register_input:
err_query_device:
	synaptics_rmi4_empty_fn_list(rmi4_data);
	input_free_device(rmi4_data->input_dev);

err_input_device:
	return retval;
}

static int synaptics_rmi4_set_gpio(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	const struct synaptics_dsx_board_data *bdata =
			rmi4_data->hw_if->board_data;

	retval = synaptics_rmi4_gpio_setup(
			bdata->irq_gpio,
			true, 0, 0);
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to configure attention GPIO\n",
				__func__);
		goto err_gpio_irq;
	}

	if (bdata->power_gpio >= 0) {
		retval = synaptics_rmi4_gpio_setup(
				bdata->power_gpio,
				true, 1, !bdata->power_on_state);
		if (retval < 0) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to configure power GPIO\n",
					__func__);
			goto err_gpio_power;
		}
	}

	if (bdata->reset_gpio >= 0) {
		retval = synaptics_rmi4_gpio_setup(
				bdata->reset_gpio,
				true, 1, !bdata->reset_on_state);
		if (retval < 0) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to configure reset GPIO\n",
					__func__);
			goto err_gpio_reset;
		}
	}

	if (bdata->power_gpio >= 0) {
		gpio_set_value(bdata->power_gpio, bdata->power_on_state);
		msleep(bdata->power_delay_ms);
	}

	if (bdata->reset_gpio >= 0) {
		gpio_set_value(bdata->reset_gpio, bdata->reset_on_state);
		msleep(bdata->reset_active_ms);
		gpio_set_value(bdata->reset_gpio, !bdata->reset_on_state);
		msleep(bdata->reset_delay_ms);
	}

	return 0;

err_gpio_reset:
	if (bdata->power_gpio >= 0)
		synaptics_rmi4_gpio_setup(bdata->power_gpio, false, 0, 0);

err_gpio_power:
	synaptics_rmi4_gpio_setup(bdata->irq_gpio, false, 0, 0);

err_gpio_irq:
	return retval;
}

static int synaptics_rmi4_get_reg(struct synaptics_rmi4_data *rmi4_data,
		bool get)
{
	int retval;
	const struct synaptics_dsx_board_data *bdata =
			rmi4_data->hw_if->board_data;

	if (!get) {
		retval = 0;
		goto regulator_put;
	}

	if ((bdata->pwr_reg_name != NULL) && (*bdata->pwr_reg_name != 0)) {
		rmi4_data->pwr_reg = regulator_get(NULL,
				bdata->pwr_reg_name);
		if (IS_ERR(rmi4_data->pwr_reg)) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to get power regulator\n",
					__func__);
			retval = PTR_ERR(rmi4_data->pwr_reg);
			goto regulator_put;
		}
	}

	if ((bdata->bus_reg_name != NULL) && (*bdata->bus_reg_name != 0)) {
		rmi4_data->bus_reg = regulator_get(NULL,
				bdata->bus_reg_name);
		if (IS_ERR(rmi4_data->bus_reg)) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to get bus pullup regulator\n",
					__func__);
			retval = PTR_ERR(rmi4_data->bus_reg);
			goto regulator_put;
		}
	}

	return 0;

regulator_put:
	if (rmi4_data->pwr_reg) {
		regulator_put(rmi4_data->pwr_reg);
		rmi4_data->pwr_reg = NULL;
	}

	if (rmi4_data->bus_reg) {
		regulator_put(rmi4_data->bus_reg);
		rmi4_data->bus_reg = NULL;
	}

	return retval;
}

static int synaptics_rmi4_enable_reg(struct synaptics_rmi4_data *rmi4_data,
		bool enable)
{
	int retval;
	const struct synaptics_dsx_board_data *bdata =
			rmi4_data->hw_if->board_data;

	if (!enable) {
		retval = 0;
		goto disable_pwr_reg;
	}

	if (rmi4_data->bus_reg) {
		retval = regulator_enable(rmi4_data->bus_reg);
		if (retval < 0) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to enable bus pullup regulator\n",
					__func__);
			goto exit;
		}
	}

	if (rmi4_data->pwr_reg) {
		retval = regulator_enable(rmi4_data->pwr_reg);
		if (retval < 0) {
			dev_err(rmi4_data->pdev->dev.parent,
					"%s: Failed to enable power regulator\n",
					__func__);
			goto disable_bus_reg;
		}
		msleep(bdata->power_delay_ms);
	}

	return 0;

disable_pwr_reg:
	if (rmi4_data->pwr_reg)
		regulator_disable(rmi4_data->pwr_reg);

disable_bus_reg:
	if (rmi4_data->bus_reg)
		regulator_disable(rmi4_data->bus_reg);

exit:
	return retval;
}

static int synaptics_rmi4_free_fingers(struct synaptics_rmi4_data *rmi4_data)
{
	unsigned char ii;

	mutex_lock(&(rmi4_data->rmi4_report_mutex));

#ifdef TYPE_B_PROTOCOL
	for (ii = 0; ii < rmi4_data->num_of_fingers; ii++) {
		input_mt_slot(rmi4_data->input_dev, ii);
		input_mt_report_slot_state(rmi4_data->input_dev,
				MT_TOOL_FINGER, 0);
	}
#endif
	input_report_key(rmi4_data->input_dev,
			BTN_TOUCH, 0);
	input_report_key(rmi4_data->input_dev,
			BTN_TOOL_FINGER, 0);
#ifndef TYPE_B_PROTOCOL
	input_mt_sync(rmi4_data->input_dev);
#endif

	if (rmi4_data->lo_detected) {
		dev_info(rmi4_data->pdev->dev.parent,
				"%s: palm removed!\n", __func__);
		input_report_key(rmi4_data->input_dev,
				KEY_SLEEP, 0);
		rmi4_data->lo_detected = false;
	}

	input_sync(rmi4_data->input_dev);

	mutex_unlock(&(rmi4_data->rmi4_report_mutex));

	rmi4_data->fingers_on_2d = false;

	return 0;
}

static int synaptics_rmi4_sw_reset(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	unsigned char command = 0x01;

	retval = synaptics_rmi4_reg_write(rmi4_data,
			rmi4_data->f01_cmd_base_addr,
			&command,
			sizeof(command));
	if (retval < 0)
		return retval;

	msleep(rmi4_data->hw_if->board_data->reset_delay_ms);

	if (rmi4_data->hw_if->ui_hw_init) {
		retval = rmi4_data->hw_if->ui_hw_init(rmi4_data);
		if (retval < 0)
			return retval;
	}

	return 0;
}

static int synaptics_rmi4_reinit_device(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;
	struct synaptics_rmi4_device_info *rmi;

	rmi = &(rmi4_data->rmi4_mod_info);

	mutex_lock(&(rmi4_data->rmi4_reset_mutex));

	synaptics_rmi4_free_fingers(rmi4_data);

	if (!list_empty(&rmi->support_fn_list)) {
		list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
			if (fhandler->fn_number == SYNAPTICS_RMI4_F12) {
				synaptics_rmi4_f12_set_enables(rmi4_data, 0);
				break;
			}
		}
	}

	retval = synaptics_rmi4_int_enable(rmi4_data, true);
	if (retval < 0)
		goto exit;

	mutex_lock(&exp_data.mutex);
	if (!list_empty(&exp_data.list)) {
		list_for_each_entry(exp_fhandler, &exp_data.list, link)
			if (exp_fhandler->exp_fn->reinit != NULL)
				exp_fhandler->exp_fn->reinit(rmi4_data);
	}
	mutex_unlock(&exp_data.mutex);

	synaptics_rmi4_set_configured(rmi4_data);

	retval = 0;

exit:
	mutex_unlock(&(rmi4_data->rmi4_reset_mutex));
	return retval;
}

static int synaptics_rmi4_reset_device(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	int temp;
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;
	const struct synaptics_dsx_board_data *bdata =
				rmi4_data->hw_if->board_data;

	mutex_lock(&(rmi4_data->rmi4_reset_mutex));

	synaptics_rmi4_irq_enable(rmi4_data, false, false);

	retval = synaptics_rmi4_sw_reset(rmi4_data);
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to issue reset command\n",
				__func__);
		mutex_unlock(&(rmi4_data->rmi4_reset_mutex));
		return retval;
	}

	synaptics_rmi4_free_fingers(rmi4_data);

	synaptics_rmi4_empty_fn_list(rmi4_data);

	retval = synaptics_rmi4_query_device(rmi4_data);
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to query device\n",
				__func__);
		mutex_unlock(&(rmi4_data->rmi4_reset_mutex));
		return retval;
	}

	if (bdata->swap_axes) {
		temp = rmi4_data->sensor_max_x;
		rmi4_data->sensor_max_x = rmi4_data->sensor_max_y;
		rmi4_data->sensor_max_y = temp;
	}

	if (bdata->max_y_for_2d >= 0)
		rmi4_data->sensor_max_y = bdata->max_y_for_2d;

	synaptics_rmi4_set_params(rmi4_data);

	mutex_lock(&exp_data.mutex);
	if (!list_empty(&exp_data.list)) {
		list_for_each_entry(exp_fhandler, &exp_data.list, link)
			if (exp_fhandler->exp_fn->reset != NULL)
				exp_fhandler->exp_fn->reset(rmi4_data);
	}
	mutex_unlock(&exp_data.mutex);

	synaptics_rmi4_irq_enable(rmi4_data, true, false);

	mutex_unlock(&(rmi4_data->rmi4_reset_mutex));

	return 0;
}

static void synaptics_rmi4_exp_fn_work(struct work_struct *work)
{
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;
	struct synaptics_rmi4_exp_fhandler *exp_fhandler_temp;
	struct synaptics_rmi4_data *rmi4_data = exp_data.rmi4_data;

	mutex_lock(&exp_data.mutex);
	if (!list_empty(&exp_data.list)) {
		list_for_each_entry_safe(exp_fhandler,
				exp_fhandler_temp,
				&exp_data.list,
				link) {
			if ((exp_fhandler->exp_fn->init != NULL) &&
					exp_fhandler->insert) {
				exp_fhandler->exp_fn->init(rmi4_data);
				exp_fhandler->insert = false;
			} else if ((exp_fhandler->exp_fn->remove != NULL) &&
					exp_fhandler->remove) {
				exp_fhandler->exp_fn->remove(rmi4_data);
				list_del(&exp_fhandler->link);
				kfree(exp_fhandler);
			}
		}
	}
	mutex_unlock(&exp_data.mutex);

	return;
}

void synaptics_rmi4_new_function(struct synaptics_rmi4_exp_fn *exp_fn,
		bool insert)
{
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;

	if (!exp_data.initialized) {
		mutex_init(&exp_data.mutex);
		INIT_LIST_HEAD(&exp_data.list);
		exp_data.initialized = true;
	}

	mutex_lock(&exp_data.mutex);
	if (insert) {
		exp_fhandler = kzalloc(sizeof(*exp_fhandler), GFP_KERNEL);
		if (!exp_fhandler) {
			pr_err("%s: Failed to alloc mem for expansion function\n",
					__func__);
			goto exit;
		}
		exp_fhandler->exp_fn = exp_fn;
		exp_fhandler->insert = true;
		exp_fhandler->remove = false;
		list_add_tail(&exp_fhandler->link, &exp_data.list);
	} else if (!list_empty(&exp_data.list)) {
		list_for_each_entry(exp_fhandler, &exp_data.list, link) {
			if (exp_fhandler->exp_fn->fn_type == exp_fn->fn_type) {
				exp_fhandler->insert = false;
				exp_fhandler->remove = true;
				goto exit;
			}
		}
	}

exit:
	mutex_unlock(&exp_data.mutex);

	if (exp_data.queue_work) {
		queue_delayed_work(exp_data.workqueue,
				&exp_data.work,
				msecs_to_jiffies(EXP_FN_WORK_DELAY_MS));
	}

	return;
}
EXPORT_SYMBOL(synaptics_rmi4_new_function);

static int synaptics_rmi4_probe(struct platform_device *pdev)
{
	int retval;
	unsigned char attr_count;
	struct synaptics_rmi4_data *rmi4_data;
	const struct synaptics_dsx_hw_interface *hw_if;
	const struct synaptics_dsx_board_data *bdata;

	hw_if = pdev->dev.platform_data;
	if (!hw_if) {
		dev_err(&pdev->dev,
				"%s: No hardware interface found\n",
				__func__);
		return -EINVAL;
	}

	bdata = hw_if->board_data;
	if (!bdata) {
		dev_err(&pdev->dev,
				"%s: No board data found\n",
				__func__);
		return -EINVAL;
	}

	rmi4_data = kzalloc(sizeof(*rmi4_data), GFP_KERNEL);
	if (!rmi4_data) {
		dev_err(&pdev->dev,
				"%s: Failed to alloc mem for rmi4_data\n",
				__func__);
		return -ENOMEM;
	}

	rmi4_data->pdev = pdev;
	rmi4_data->current_page = MASK_8BIT;
	rmi4_data->hw_if = hw_if;
	rmi4_data->suspend = false;
	rmi4_data->irq_enabled = false;
	rmi4_data->fingers_on_2d = false;

	rmi4_data->reset_device = synaptics_rmi4_reset_device;
	rmi4_data->irq_enable = synaptics_rmi4_irq_enable;

	mutex_init(&(rmi4_data->rmi4_reset_mutex));
	mutex_init(&(rmi4_data->rmi4_report_mutex));
	mutex_init(&(rmi4_data->rmi4_io_ctrl_mutex));
	hrtimer_init(&rmi4_data->hr_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	INIT_WORK(&rmi4_data->poll_work, synaptics_rmi4_data_poll);
	rmi4_data->hr_timer.function = synaptics_rmi4_hrtimer;

	platform_set_drvdata(pdev, rmi4_data);

	vir_button_map = bdata->vir_button_map;

	retval = synaptics_rmi4_get_reg(rmi4_data, true);
	if (retval < 0) {
		dev_err(&pdev->dev,
				"%s: Failed to get regulators\n",
				__func__);
		goto err_get_reg;
	}

	retval = synaptics_rmi4_enable_reg(rmi4_data, true);
	if (retval < 0) {
		dev_err(&pdev->dev,
				"%s: Failed to enable regulators\n",
				__func__);
		goto err_enable_reg;
	}

	retval = synaptics_rmi4_set_gpio(rmi4_data);
	if (retval < 0) {
		dev_err(&pdev->dev,
				"%s: Failed to set up GPIO's\n",
				__func__);
		goto err_set_gpio;
	}

	if (hw_if->ui_hw_init) {
		retval = hw_if->ui_hw_init(rmi4_data);
		if (retval < 0) {
			dev_err(&pdev->dev,
					"%s: Failed to initialize hardware interface\n",
					__func__);
			goto err_ui_hw_init;
		}
	}

	retval = synaptics_rmi4_set_input_dev(rmi4_data);
	if (retval < 0) {
		dev_err(&pdev->dev,
				"%s: Failed to set up input device\n",
				__func__);
		goto err_set_input_dev;
	}

	rmi4_data->stay_awake = rmi4_data->enable_wakeup_gesture;

#ifdef CONFIG_HAS_EARLYSUSPEND
	rmi4_data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
	rmi4_data->early_suspend.suspend = synaptics_rmi4_early_suspend;
	rmi4_data->early_suspend.resume = synaptics_rmi4_late_resume;
	register_early_suspend(&rmi4_data->early_suspend);
#endif

	if (!exp_data.initialized) {
		mutex_init(&exp_data.mutex);
		INIT_LIST_HEAD(&exp_data.list);
		exp_data.initialized = true;
	}

	rmi4_data->irq = gpio_to_irq(bdata->irq_gpio);

	retval = synaptics_rmi4_irq_enable(rmi4_data, true, false);
	if (retval < 0) {
		dev_err(&pdev->dev,
				"%s: Failed to enable attention interrupt\n",
				__func__);
		goto err_enable_irq;
	}

	if (vir_button_map->nbuttons) {
		rmi4_data->board_prop_dir = kobject_create_and_add(
				"board_properties", NULL);
		if (!rmi4_data->board_prop_dir) {
			dev_err(&pdev->dev,
					"%s: Failed to create board_properties directory\n",
					__func__);
			goto err_virtual_buttons;
		} else {
			retval = sysfs_create_file(rmi4_data->board_prop_dir,
					&virtual_key_map_attr.attr);
			if (retval < 0) {
				dev_err(&pdev->dev,
						"%s: Failed to create virtual key map file\n",
						__func__);
				goto err_virtual_buttons;
			}
		}
	}

	for (attr_count = 0; attr_count < ARRAY_SIZE(attrs); attr_count++) {
		retval = sysfs_create_file(&rmi4_data->input_dev->dev.kobj,
				&attrs[attr_count].attr);
		if (retval < 0) {
			dev_err(&pdev->dev,
					"%s: Failed to create sysfs attributes\n",
					__func__);
			goto err_sysfs;
		}
	}

	exp_data.workqueue = create_singlethread_workqueue("dsx_exp_workqueue");
	INIT_DELAYED_WORK(&exp_data.work, synaptics_rmi4_exp_fn_work);
	exp_data.rmi4_data = rmi4_data;
	exp_data.queue_work = true;
	queue_delayed_work(exp_data.workqueue,
			&exp_data.work,
			0);

	return retval;

err_sysfs:
	for (attr_count--; attr_count >= 0; attr_count--) {
		sysfs_remove_file(&rmi4_data->input_dev->dev.kobj,
				&attrs[attr_count].attr);
	}

err_virtual_buttons:
	if (rmi4_data->board_prop_dir) {
		sysfs_remove_file(rmi4_data->board_prop_dir,
				&virtual_key_map_attr.attr);
		kobject_put(rmi4_data->board_prop_dir);
	}

	synaptics_rmi4_irq_enable(rmi4_data, false, false);

err_enable_irq:
#ifdef CONFIG_HAS_EARLYSUSPEND
	unregister_early_suspend(&rmi4_data->early_suspend);
#endif

	synaptics_rmi4_empty_fn_list(rmi4_data);
	input_unregister_device(rmi4_data->input_dev);
	rmi4_data->input_dev = NULL;

err_set_input_dev:
	synaptics_rmi4_gpio_setup(bdata->irq_gpio, false, 0, 0);

	if (bdata->reset_gpio >= 0)
		synaptics_rmi4_gpio_setup(bdata->reset_gpio, false, 0, 0);

	if (bdata->power_gpio >= 0)
		synaptics_rmi4_gpio_setup(bdata->power_gpio, false, 0, 0);

err_ui_hw_init:
err_set_gpio:
	synaptics_rmi4_enable_reg(rmi4_data, false);

err_enable_reg:
	synaptics_rmi4_get_reg(rmi4_data, false);

err_get_reg:
	kfree(rmi4_data);

	return retval;
}

static int synaptics_rmi4_remove(struct platform_device *pdev)
{
	unsigned char attr_count;
	struct synaptics_rmi4_data *rmi4_data = platform_get_drvdata(pdev);
	const struct synaptics_dsx_board_data *bdata =
			rmi4_data->hw_if->board_data;

	cancel_delayed_work_sync(&exp_data.work);
	flush_workqueue(exp_data.workqueue);
	destroy_workqueue(exp_data.workqueue);

	for (attr_count = 0; attr_count < ARRAY_SIZE(attrs); attr_count++) {
		sysfs_remove_file(&rmi4_data->input_dev->dev.kobj,
				&attrs[attr_count].attr);
	}

	if (rmi4_data->board_prop_dir) {
		sysfs_remove_file(rmi4_data->board_prop_dir,
				&virtual_key_map_attr.attr);
		kobject_put(rmi4_data->board_prop_dir);
	}

	synaptics_rmi4_irq_enable(rmi4_data, false, false);

#ifdef CONFIG_HAS_EARLYSUSPEND
	unregister_early_suspend(&rmi4_data->early_suspend);
#endif

	synaptics_rmi4_empty_fn_list(rmi4_data);
	input_unregister_device(rmi4_data->input_dev);
	rmi4_data->input_dev = NULL;

	synaptics_rmi4_gpio_setup(bdata->irq_gpio, false, 0, 0);

	if (bdata->reset_gpio >= 0)
		synaptics_rmi4_gpio_setup(bdata->reset_gpio, false, 0, 0);

	if (bdata->power_gpio >= 0)
		synaptics_rmi4_gpio_setup(bdata->power_gpio, false, 0, 0);

	synaptics_rmi4_enable_reg(rmi4_data, false);
	synaptics_rmi4_get_reg(rmi4_data, false);

	kfree(rmi4_data);

	return 0;
}

#ifdef CONFIG_PM
static void synaptics_rmi4_f11_wg(struct synaptics_rmi4_data *rmi4_data,
		bool enable)
{
	int retval;
	unsigned char reporting_control;
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_device_info *rmi;

	dev_info(rmi4_data->pdev->dev.parent,
			"%s: enable %d\n", __func__, enable);

	rmi = &(rmi4_data->rmi4_mod_info);

	list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
		if (fhandler->fn_number == SYNAPTICS_RMI4_F11)
			break;
	}

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.ctrl_base,
			&reporting_control,
			sizeof(reporting_control));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to change reporting mode\n",
				__func__);
		return;
	}

	reporting_control = (reporting_control & ~MASK_3BIT);
	if (enable)
		reporting_control |= F11_WAKEUP_GESTURE_MODE;
	else
		reporting_control |= F11_CONTINUOUS_MODE;

	retval = synaptics_rmi4_reg_write(rmi4_data,
			fhandler->full_addr.ctrl_base,
			&reporting_control,
			sizeof(reporting_control));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to change reporting mode\n",
				__func__);
		return;
	}

	rmi4_data->wg_sent = false;
	rmi4_data->wakeup_gesture_active = enable;

	return;
}

static void synaptics_rmi4_f12_wg(struct synaptics_rmi4_data *rmi4_data,
		bool enable)
{
	int retval;
	unsigned char offset;
	unsigned char reporting_control[3];
	struct synaptics_rmi4_f12_extra_data *extra_data;
	struct synaptics_rmi4_fn *fhandler;
	struct synaptics_rmi4_device_info *rmi;

	rmi = &(rmi4_data->rmi4_mod_info);

	list_for_each_entry(fhandler, &rmi->support_fn_list, link) {
		if (fhandler->fn_number == SYNAPTICS_RMI4_F12)
			break;
	}

	extra_data = (struct synaptics_rmi4_f12_extra_data *)fhandler->extra;
	offset = extra_data->ctrl20_offset;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			fhandler->full_addr.ctrl_base + offset,
			reporting_control,
			sizeof(reporting_control));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to change reporting mode\n",
				__func__);
		return;
	}

	if (enable)
		reporting_control[2] = F12_WAKEUP_GESTURE_MODE;
	else
		reporting_control[2] = F12_CONTINUOUS_MODE;

	retval = synaptics_rmi4_reg_write(rmi4_data,
			fhandler->full_addr.ctrl_base + offset,
			reporting_control,
			sizeof(reporting_control));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to change reporting mode\n",
				__func__);
		return;
	}

	rmi4_data->wakeup_gesture_active = enable;

	return;
}

static void synaptics_rmi4_wakeup_gesture(struct synaptics_rmi4_data *rmi4_data,
		bool enable)
{
	if (rmi4_data->f11_wakeup_gesture)
		synaptics_rmi4_f11_wg(rmi4_data, enable);
	else if (rmi4_data->f12_wakeup_gesture)
		synaptics_rmi4_f12_wg(rmi4_data, enable);

	return;
}

static ssize_t synaptics_mode_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	if (!rmi4_data->stay_awake)
		return scnprintf(buf, PAGE_SIZE, "%s\n", "off");
	else if (rmi4_data->wakeup_gesture_active)
		return scnprintf(buf, PAGE_SIZE, "%s\n", "doze");
	else
		return scnprintf(buf, PAGE_SIZE, "%s\n", "on");
}

static ssize_t synaptics_mode_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	int rc = 0;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	if (!rmi4_data->enable_wakeup_gesture)
		return -EINVAL;

	if (!strncmp(buf, "doze", strlen("doze"))) {
		synaptics_rmi4_free_fingers(rmi4_data);
		synaptics_rmi4_wakeup_gesture(rmi4_data, true);
		rmi4_data->stay_awake = true;
		dev_info(rmi4_data->pdev->dev.parent, "Setting touch to doze");
	} else if (!strncmp(buf, "on", strlen("on"))) {
		synaptics_rmi4_wakeup_gesture(rmi4_data, false);
		rmi4_data->stay_awake = true;
		dev_info(rmi4_data->pdev->dev.parent, "Setting touch to on");
	} else if (!strncmp(buf, "off", strlen("off"))) {
		/* Turn off wake up gestures */
		synaptics_rmi4_free_fingers(rmi4_data);
		synaptics_rmi4_wakeup_gesture(rmi4_data, false);
		rmi4_data->stay_awake = false;
		dev_info(rmi4_data->pdev->dev.parent, "Setting touch to off");
	} else {
		rc = -EINVAL;
	}
	return rc ? rc : count;
}

static void synaptics_rmi4_sensor_sleep(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	unsigned char device_ctrl;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_ctrl_base_addr,
			&device_ctrl,
			sizeof(device_ctrl));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to enter sleep mode\n",
				__func__);
		return;
	}

	device_ctrl = (device_ctrl & ~MASK_3BIT);
	device_ctrl = (device_ctrl | NO_SLEEP_OFF | SENSOR_SLEEP);

	retval = synaptics_rmi4_reg_write(rmi4_data,
			rmi4_data->f01_ctrl_base_addr,
			&device_ctrl,
			sizeof(device_ctrl));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to enter sleep mode\n",
				__func__);
		return;
	}

	rmi4_data->sensor_sleep = true;

	return;
}

static void synaptics_rmi4_sensor_wake(struct synaptics_rmi4_data *rmi4_data)
{
	int retval;
	unsigned char device_ctrl;
	unsigned char no_sleep_setting = rmi4_data->no_sleep_setting;

	retval = synaptics_rmi4_reg_read(rmi4_data,
			rmi4_data->f01_ctrl_base_addr,
			&device_ctrl,
			sizeof(device_ctrl));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to wake from sleep mode\n",
				__func__);
		return;
	}

	device_ctrl = (device_ctrl & ~MASK_3BIT);
	device_ctrl = (device_ctrl | no_sleep_setting | NORMAL_OPERATION);

	retval = synaptics_rmi4_reg_write(rmi4_data,
			rmi4_data->f01_ctrl_base_addr,
			&device_ctrl,
			sizeof(device_ctrl));
	if (retval < 0) {
		dev_err(rmi4_data->pdev->dev.parent,
				"%s: Failed to wake from sleep mode\n",
				__func__);
		return;
	}

	rmi4_data->sensor_sleep = false;

	return;
}

#ifdef CONFIG_HAS_EARLYSUSPEND
static void synaptics_rmi4_early_suspend(struct early_suspend *h)
{
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;
	struct synaptics_rmi4_data *rmi4_data =
			container_of(h, struct synaptics_rmi4_data,
			early_suspend);

	if (rmi4_data->stay_awake)
		return;

	if (rmi4_data->enable_wakeup_gesture) {
		synaptics_rmi4_wakeup_gesture(rmi4_data, true);
		goto exit;
	}

	synaptics_rmi4_irq_enable(rmi4_data, false, false);
	synaptics_rmi4_sensor_sleep(rmi4_data);
	synaptics_rmi4_free_fingers(rmi4_data);

	mutex_lock(&exp_data.mutex);
	if (!list_empty(&exp_data.list)) {
		list_for_each_entry(exp_fhandler, &exp_data.list, link)
			if (exp_fhandler->exp_fn->early_suspend != NULL)
				exp_fhandler->exp_fn->early_suspend(rmi4_data);
	}
	mutex_unlock(&exp_data.mutex);

	if (rmi4_data->full_pm_cycle)
		synaptics_rmi4_suspend(&(rmi4_data->input_dev->dev));

exit:
	rmi4_data->suspend = true;

	return;
}

static void synaptics_rmi4_late_resume(struct early_suspend *h)
{
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;
	struct synaptics_rmi4_data *rmi4_data =
			container_of(h, struct synaptics_rmi4_data,
			early_suspend);

	if (rmi4_data->stay_awake)
		return;

	if (rmi4_data->enable_wakeup_gesture) {
		synaptics_rmi4_wakeup_gesture(rmi4_data, false);
		goto exit;
	}

	if (rmi4_data->full_pm_cycle)
		synaptics_rmi4_resume(&(rmi4_data->input_dev->dev));

	if (rmi4_data->suspend) {
		synaptics_rmi4_sensor_wake(rmi4_data);
		synaptics_rmi4_irq_enable(rmi4_data, true, false);
	}

	mutex_lock(&exp_data.mutex);
	if (!list_empty(&exp_data.list)) {
		list_for_each_entry(exp_fhandler, &exp_data.list, link)
			if (exp_fhandler->exp_fn->late_resume != NULL)
				exp_fhandler->exp_fn->late_resume(rmi4_data);
	}
	mutex_unlock(&exp_data.mutex);

exit:
	rmi4_data->suspend = false;

	return;
}
#endif

static int synaptics_rmi4_suspend(struct device *dev)
{
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	if (rmi4_data->stay_awake)
		return 0;

	synaptics_rmi4_irq_enable(rmi4_data, false, false);
	synaptics_rmi4_sensor_sleep(rmi4_data);
	synaptics_rmi4_free_fingers(rmi4_data);

	mutex_lock(&exp_data.mutex);
	if (!list_empty(&exp_data.list)) {
		list_for_each_entry(exp_fhandler, &exp_data.list, link)
			if (exp_fhandler->exp_fn->suspend != NULL)
				exp_fhandler->exp_fn->suspend(rmi4_data);
	}
	mutex_unlock(&exp_data.mutex);

	rmi4_data->suspend = true;

	return 0;
}

static int synaptics_rmi4_resume(struct device *dev)
{
	struct synaptics_rmi4_exp_fhandler *exp_fhandler;
	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);

	if (rmi4_data->stay_awake)
		return 0;

	synaptics_rmi4_sensor_wake(rmi4_data);
	synaptics_rmi4_irq_enable(rmi4_data, true, false);

	mutex_lock(&exp_data.mutex);
	if (!list_empty(&exp_data.list)) {
		list_for_each_entry(exp_fhandler, &exp_data.list, link)
			if (exp_fhandler->exp_fn->resume != NULL)
				exp_fhandler->exp_fn->resume(rmi4_data);
	}
	mutex_unlock(&exp_data.mutex);

	rmi4_data->suspend = false;

	return 0;
}

static const struct dev_pm_ops synaptics_rmi4_dev_pm_ops = {
	.suspend = synaptics_rmi4_suspend,
	.resume  = synaptics_rmi4_resume,
};
#endif

static struct platform_driver synaptics_rmi4_driver = {
	.driver = {
		.name = PLATFORM_DRIVER_NAME,
		.owner = THIS_MODULE,
#ifdef CONFIG_PM
		.pm = &synaptics_rmi4_dev_pm_ops,
#endif
	},
	.probe = synaptics_rmi4_probe,
	.remove = synaptics_rmi4_remove,
};

static int __init synaptics_rmi4_init(void)
{
	int retval;

	retval = synaptics_rmi4_bus_init();
	if (retval)
		return retval;

	return platform_driver_register(&synaptics_rmi4_driver);
}

static void __exit synaptics_rmi4_exit(void)
{
	platform_driver_unregister(&synaptics_rmi4_driver);

	synaptics_rmi4_bus_exit();

	return;
}

module_init(synaptics_rmi4_init);
module_exit(synaptics_rmi4_exit);

MODULE_AUTHOR("Synaptics, Inc.");
MODULE_DESCRIPTION("Synaptics DSX Touch Driver");
MODULE_LICENSE("GPL v2");