drivers/input/rmi4/rmi_2d_sensor.c - arm/linux - Git at Google

 /*
  * Copyright (c) 2011-2016 Synaptics Incorporated
  * Copyright (c) 2011 Unixphere
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published by
  * the Free Software Foundation.
  */

 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/of.h>
 #include <linux/input.h>
 #include <linux/input/mt.h>
 #include <linux/rmi.h>
 #include "rmi_driver.h"
 #include "rmi_2d_sensor.h"

 #define RMI_2D_REL_POS_MIN		-128
 #define RMI_2D_REL_POS_MAX		127

 /* maximum ABS_MT_POSITION displacement (in mm) */
 #define DMAX 10

 void rmi_2d_sensor_abs_process(struct rmi_2d_sensor *sensor,
 				struct rmi_2d_sensor_abs_object *obj,
 				int slot)
 {
 	struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;

 	/* we keep the previous values if the finger is released */
 	if (obj->type == RMI_2D_OBJECT_NONE)
 		return;

 	if (axis_align->swap_axes)
 		swap(obj->x, obj->y);

 	if (axis_align->flip_x)
 		obj->x = sensor->max_x - obj->x;

 	if (axis_align->flip_y)
 		obj->y = sensor->max_y - obj->y;

 	/*
 	 * Here checking if X offset or y offset are specified is
 	 * redundant. We just add the offsets or clip the values.
 	 *
 	 * Note: offsets need to be applied before clipping occurs,
 	 * or we could get funny values that are outside of
 	 * clipping boundaries.
 	 */
 	obj->x += axis_align->offset_x;
 	obj->y += axis_align->offset_y;

 	obj->x =  max(axis_align->clip_x_low, obj->x);
 	obj->y =  max(axis_align->clip_y_low, obj->y);

 	if (axis_align->clip_x_high)
 		obj->x = min(sensor->max_x, obj->x);

 	if (axis_align->clip_y_high)
 		obj->y =  min(sensor->max_y, obj->y);

 	sensor->tracking_pos[slot].x = obj->x;
 	sensor->tracking_pos[slot].y = obj->y;
 }
 EXPORT_SYMBOL_GPL(rmi_2d_sensor_abs_process);

 void rmi_2d_sensor_abs_report(struct rmi_2d_sensor *sensor,
 				struct rmi_2d_sensor_abs_object *obj,
 				int slot)
 {
 	struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;
 	struct input_dev *input = sensor->input;
 	int wide, major, minor;

 	if (sensor->kernel_tracking)
 		input_mt_slot(input, sensor->tracking_slots[slot]);
 	else
 		input_mt_slot(input, slot);

 	input_mt_report_slot_state(input, obj->mt_tool,
 				   obj->type != RMI_2D_OBJECT_NONE);

 	if (obj->type != RMI_2D_OBJECT_NONE) {
 		obj->x = sensor->tracking_pos[slot].x;
 		obj->y = sensor->tracking_pos[slot].y;

 		if (axis_align->swap_axes)
 			swap(obj->wx, obj->wy);

 		wide = (obj->wx > obj->wy);
 		major = max(obj->wx, obj->wy);
 		minor = min(obj->wx, obj->wy);

 		if (obj->type == RMI_2D_OBJECT_STYLUS) {
 			major = max(1, major);
 			minor = max(1, minor);
 		}

 		input_event(sensor->input, EV_ABS, ABS_MT_POSITION_X, obj->x);
 		input_event(sensor->input, EV_ABS, ABS_MT_POSITION_Y, obj->y);
 		input_event(sensor->input, EV_ABS, ABS_MT_ORIENTATION, wide);
 		input_event(sensor->input, EV_ABS, ABS_MT_PRESSURE, obj->z);
 		input_event(sensor->input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 		input_event(sensor->input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);

 		rmi_dbg(RMI_DEBUG_2D_SENSOR, &sensor->input->dev,
 			"%s: obj[%d]: type: 0x%02x X: %d Y: %d Z: %d WX: %d WY: %d\n",
 			__func__, slot, obj->type, obj->x, obj->y, obj->z,
 			obj->wx, obj->wy);
 	}
 }
 EXPORT_SYMBOL_GPL(rmi_2d_sensor_abs_report);

 void rmi_2d_sensor_rel_report(struct rmi_2d_sensor *sensor, int x, int y)
 {
 	struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;

 	x = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)x));
 	y = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)y));

 	if (axis_align->swap_axes)
 		swap(x, y);

 	if (axis_align->flip_x)
 		x = min(RMI_2D_REL_POS_MAX, -x);

 	if (axis_align->flip_y)
 		y = min(RMI_2D_REL_POS_MAX, -y);

 	if (x || y) {
 		input_report_rel(sensor->input, REL_X, x);
 		input_report_rel(sensor->input, REL_Y, y);
 	}
 }
 EXPORT_SYMBOL_GPL(rmi_2d_sensor_rel_report);

 static void rmi_2d_sensor_set_input_params(struct rmi_2d_sensor *sensor)
 {
 	struct input_dev *input = sensor->input;
 	int res_x;
 	int res_y;
 	int input_flags = 0;

 	if (sensor->report_abs) {
 		if (sensor->axis_align.swap_axes) {
 			swap(sensor->max_x, sensor->max_y);
 			swap(sensor->axis_align.clip_x_low,
 			     sensor->axis_align.clip_y_low);
 			swap(sensor->axis_align.clip_x_high,
 			     sensor->axis_align.clip_y_high);
 		}

 		sensor->min_x = sensor->axis_align.clip_x_low;
 		if (sensor->axis_align.clip_x_high)
 			sensor->max_x = min(sensor->max_x,
 				sensor->axis_align.clip_x_high);

 		sensor->min_y = sensor->axis_align.clip_y_low;
 		if (sensor->axis_align.clip_y_high)
 			sensor->max_y = min(sensor->max_y,
 				sensor->axis_align.clip_y_high);

 		set_bit(EV_ABS, input->evbit);
 		input_set_abs_params(input, ABS_MT_POSITION_X, 0, sensor->max_x,
 					0, 0);
 		input_set_abs_params(input, ABS_MT_POSITION_Y, 0, sensor->max_y,
 					0, 0);

 		if (sensor->x_mm && sensor->y_mm) {
 			res_x = (sensor->max_x - sensor->min_x) / sensor->x_mm;
 			res_y = (sensor->max_y - sensor->min_y) / sensor->y_mm;

 			input_abs_set_res(input, ABS_X, res_x);
 			input_abs_set_res(input, ABS_Y, res_y);

 			input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
 			input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);

 			if (!sensor->dmax)
 				sensor->dmax = DMAX * res_x;
 		}

 		input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0);
 		input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0);
 		input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0);
 		input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
 		input_set_abs_params(input, ABS_MT_TOOL_TYPE,
 				     0, MT_TOOL_MAX, 0, 0);

 		if (sensor->sensor_type == rmi_sensor_touchpad)
 			input_flags = INPUT_MT_POINTER;
 		else
 			input_flags = INPUT_MT_DIRECT;

 		if (sensor->kernel_tracking)
 			input_flags |= INPUT_MT_TRACK;

 		input_mt_init_slots(input, sensor->nbr_fingers, input_flags);
 	}

 	if (sensor->report_rel) {
 		set_bit(EV_REL, input->evbit);
 		set_bit(REL_X, input->relbit);
 		set_bit(REL_Y, input->relbit);
 	}

 	if (sensor->topbuttonpad)
 		set_bit(INPUT_PROP_TOPBUTTONPAD, input->propbit);
 }
 EXPORT_SYMBOL_GPL(rmi_2d_sensor_set_input_params);

 int rmi_2d_sensor_configure_input(struct rmi_function *fn,
 					struct rmi_2d_sensor *sensor)
 {
 	struct rmi_device *rmi_dev = fn->rmi_dev;
 	struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);

 	if (!drv_data->input)
 		return -ENODEV;

 	sensor->input = drv_data->input;
 	rmi_2d_sensor_set_input_params(sensor);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(rmi_2d_sensor_configure_input);

 #ifdef CONFIG_OF
 int rmi_2d_sensor_of_probe(struct device *dev,
 			struct rmi_2d_sensor_platform_data *pdata)
 {
 	int retval;
 	u32 val;

 	pdata->axis_align.swap_axes = of_property_read_bool(dev->of_node,
 						"touchscreen-swapped-x-y");

 	pdata->axis_align.flip_x = of_property_read_bool(dev->of_node,
 						"touchscreen-inverted-x");

 	pdata->axis_align.flip_y = of_property_read_bool(dev->of_node,
 						"touchscreen-inverted-y");

 	retval = rmi_of_property_read_u32(dev, &val, "syna,clip-x-low", 1);
 	if (retval)
 		return retval;

 	pdata->axis_align.clip_x_low = val;

 	retval = rmi_of_property_read_u32(dev, &val, "syna,clip-y-low",	1);
 	if (retval)
 		return retval;

 	pdata->axis_align.clip_y_low = val;

 	retval = rmi_of_property_read_u32(dev, &val, "syna,clip-x-high", 1);
 	if (retval)
 		return retval;

 	pdata->axis_align.clip_x_high = val;

 	retval = rmi_of_property_read_u32(dev, &val, "syna,clip-y-high", 1);
 	if (retval)
 		return retval;

 	pdata->axis_align.clip_y_high = val;

 	retval = rmi_of_property_read_u32(dev, &val, "syna,offset-x", 1);
 	if (retval)
 		return retval;

 	pdata->axis_align.offset_x = val;

 	retval = rmi_of_property_read_u32(dev, &val, "syna,offset-y", 1);
 	if (retval)
 		return retval;

 	pdata->axis_align.offset_y = val;

 	retval = rmi_of_property_read_u32(dev, &val, "syna,delta-x-threshold",
 						1);
 	if (retval)
 		return retval;

 	pdata->axis_align.delta_x_threshold = val;

 	retval = rmi_of_property_read_u32(dev, &val, "syna,delta-y-threshold",
 						1);
 	if (retval)
 		return retval;

 	pdata->axis_align.delta_y_threshold = val;

 	retval = rmi_of_property_read_u32(dev, (u32 *)&pdata->sensor_type,
 			"syna,sensor-type", 1);
 	if (retval)
 		return retval;

 	retval = rmi_of_property_read_u32(dev, &val, "touchscreen-x-mm", 1);
 	if (retval)
 		return retval;

 	pdata->x_mm = val;

 	retval = rmi_of_property_read_u32(dev, &val, "touchscreen-y-mm", 1);
 	if (retval)
 		return retval;

 	pdata->y_mm = val;

 	retval = rmi_of_property_read_u32(dev, &val,
 				"syna,disable-report-mask", 1);
 	if (retval)
 		return retval;

 	pdata->disable_report_mask = val;

 	retval = rmi_of_property_read_u32(dev, &val, "syna,rezero-wait-ms",
 						1);
 	if (retval)
 		return retval;

 	pdata->rezero_wait = val;

 	return 0;
 }
 #else
 inline int rmi_2d_sensor_of_probe(struct device *dev,
 			struct rmi_2d_sensor_platform_data *pdata)
 {
 	return -ENODEV;
 }
 #endif
 EXPORT_SYMBOL_GPL(rmi_2d_sensor_of_probe);
	/*
	* Copyright (c) 2011-2016 Synaptics Incorporated
	* Copyright (c) 2011 Unixphere
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 as published by
	* the Free Software Foundation.
	*/

	#include <linux/kernel.h>
	#include <linux/device.h>
	#include <linux/of.h>
	#include <linux/input.h>
	#include <linux/input/mt.h>
	#include <linux/rmi.h>
	#include "rmi_driver.h"
	#include "rmi_2d_sensor.h"

	#define RMI_2D_REL_POS_MIN -128
	#define RMI_2D_REL_POS_MAX 127

	/* maximum ABS_MT_POSITION displacement (in mm) */
	#define DMAX 10

	void rmi_2d_sensor_abs_process(struct rmi_2d_sensor *sensor,
	struct rmi_2d_sensor_abs_object *obj,
	int slot)
	{
	struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;

	/* we keep the previous values if the finger is released */
	if (obj->type == RMI_2D_OBJECT_NONE)
	return;

	if (axis_align->swap_axes)
	swap(obj->x, obj->y);

	if (axis_align->flip_x)
	obj->x = sensor->max_x - obj->x;

	if (axis_align->flip_y)
	obj->y = sensor->max_y - obj->y;

	/*
	* Here checking if X offset or y offset are specified is
	* redundant. We just add the offsets or clip the values.
	*
	* Note: offsets need to be applied before clipping occurs,
	* or we could get funny values that are outside of
	* clipping boundaries.
	*/
	obj->x += axis_align->offset_x;
	obj->y += axis_align->offset_y;

	obj->x = max(axis_align->clip_x_low, obj->x);
	obj->y = max(axis_align->clip_y_low, obj->y);

	if (axis_align->clip_x_high)
	obj->x = min(sensor->max_x, obj->x);

	if (axis_align->clip_y_high)
	obj->y = min(sensor->max_y, obj->y);

	sensor->tracking_pos[slot].x = obj->x;
	sensor->tracking_pos[slot].y = obj->y;
	}
	EXPORT_SYMBOL_GPL(rmi_2d_sensor_abs_process);

	void rmi_2d_sensor_abs_report(struct rmi_2d_sensor *sensor,
	struct rmi_2d_sensor_abs_object *obj,
	int slot)
	{
	struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;
	struct input_dev *input = sensor->input;
	int wide, major, minor;

	if (sensor->kernel_tracking)
	input_mt_slot(input, sensor->tracking_slots[slot]);
	else
	input_mt_slot(input, slot);

	input_mt_report_slot_state(input, obj->mt_tool,
	obj->type != RMI_2D_OBJECT_NONE);

	if (obj->type != RMI_2D_OBJECT_NONE) {
	obj->x = sensor->tracking_pos[slot].x;
	obj->y = sensor->tracking_pos[slot].y;

	if (axis_align->swap_axes)
	swap(obj->wx, obj->wy);

	wide = (obj->wx > obj->wy);
	major = max(obj->wx, obj->wy);
	minor = min(obj->wx, obj->wy);

	if (obj->type == RMI_2D_OBJECT_STYLUS) {
	major = max(1, major);
	minor = max(1, minor);
	}

	input_event(sensor->input, EV_ABS, ABS_MT_POSITION_X, obj->x);
	input_event(sensor->input, EV_ABS, ABS_MT_POSITION_Y, obj->y);
	input_event(sensor->input, EV_ABS, ABS_MT_ORIENTATION, wide);
	input_event(sensor->input, EV_ABS, ABS_MT_PRESSURE, obj->z);
	input_event(sensor->input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
	input_event(sensor->input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);

	rmi_dbg(RMI_DEBUG_2D_SENSOR, &sensor->input->dev,
	"%s: obj[%d]: type: 0x%02x X: %d Y: %d Z: %d WX: %d WY: %d\n",
	__func__, slot, obj->type, obj->x, obj->y, obj->z,
	obj->wx, obj->wy);
	}
	}
	EXPORT_SYMBOL_GPL(rmi_2d_sensor_abs_report);

	void rmi_2d_sensor_rel_report(struct rmi_2d_sensor *sensor, int x, int y)
	{
	struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align;

	x = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)x));
	y = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)y));

	if (axis_align->swap_axes)
	swap(x, y);

	if (axis_align->flip_x)
	x = min(RMI_2D_REL_POS_MAX, -x);

	if (axis_align->flip_y)
	y = min(RMI_2D_REL_POS_MAX, -y);

	if (x \|\| y) {
	input_report_rel(sensor->input, REL_X, x);
	input_report_rel(sensor->input, REL_Y, y);
	}
	}
	EXPORT_SYMBOL_GPL(rmi_2d_sensor_rel_report);

	static void rmi_2d_sensor_set_input_params(struct rmi_2d_sensor *sensor)
	{
	struct input_dev *input = sensor->input;
	int res_x;
	int res_y;
	int input_flags = 0;

	if (sensor->report_abs) {
	if (sensor->axis_align.swap_axes) {
	swap(sensor->max_x, sensor->max_y);
	swap(sensor->axis_align.clip_x_low,
	sensor->axis_align.clip_y_low);
	swap(sensor->axis_align.clip_x_high,
	sensor->axis_align.clip_y_high);
	}

	sensor->min_x = sensor->axis_align.clip_x_low;
	if (sensor->axis_align.clip_x_high)
	sensor->max_x = min(sensor->max_x,
	sensor->axis_align.clip_x_high);

	sensor->min_y = sensor->axis_align.clip_y_low;
	if (sensor->axis_align.clip_y_high)
	sensor->max_y = min(sensor->max_y,
	sensor->axis_align.clip_y_high);

	set_bit(EV_ABS, input->evbit);
	input_set_abs_params(input, ABS_MT_POSITION_X, 0, sensor->max_x,
	0, 0);
	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, sensor->max_y,
	0, 0);

	if (sensor->x_mm && sensor->y_mm) {
	res_x = (sensor->max_x - sensor->min_x) / sensor->x_mm;
	res_y = (sensor->max_y - sensor->min_y) / sensor->y_mm;

	input_abs_set_res(input, ABS_X, res_x);
	input_abs_set_res(input, ABS_Y, res_y);

	input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
	input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);

	if (!sensor->dmax)
	sensor->dmax = DMAX * res_x;
	}

	input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0);
	input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0);
	input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0);
	input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
	input_set_abs_params(input, ABS_MT_TOOL_TYPE,
	0, MT_TOOL_MAX, 0, 0);

	if (sensor->sensor_type == rmi_sensor_touchpad)
	input_flags = INPUT_MT_POINTER;
	else
	input_flags = INPUT_MT_DIRECT;

	if (sensor->kernel_tracking)
	input_flags \|= INPUT_MT_TRACK;

	input_mt_init_slots(input, sensor->nbr_fingers, input_flags);
	}

	if (sensor->report_rel) {
	set_bit(EV_REL, input->evbit);
	set_bit(REL_X, input->relbit);
	set_bit(REL_Y, input->relbit);
	}

	if (sensor->topbuttonpad)
	set_bit(INPUT_PROP_TOPBUTTONPAD, input->propbit);
	}
	EXPORT_SYMBOL_GPL(rmi_2d_sensor_set_input_params);

	int rmi_2d_sensor_configure_input(struct rmi_function *fn,
	struct rmi_2d_sensor *sensor)
	{
	struct rmi_device *rmi_dev = fn->rmi_dev;
	struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);

	if (!drv_data->input)
	return -ENODEV;

	sensor->input = drv_data->input;
	rmi_2d_sensor_set_input_params(sensor);

	return 0;
	}
	EXPORT_SYMBOL_GPL(rmi_2d_sensor_configure_input);

	#ifdef CONFIG_OF
	int rmi_2d_sensor_of_probe(struct device *dev,
	struct rmi_2d_sensor_platform_data *pdata)
	{
	int retval;
	u32 val;

	pdata->axis_align.swap_axes = of_property_read_bool(dev->of_node,
	"touchscreen-swapped-x-y");

	pdata->axis_align.flip_x = of_property_read_bool(dev->of_node,
	"touchscreen-inverted-x");

	pdata->axis_align.flip_y = of_property_read_bool(dev->of_node,
	"touchscreen-inverted-y");

	retval = rmi_of_property_read_u32(dev, &val, "syna,clip-x-low", 1);
	if (retval)
	return retval;

	pdata->axis_align.clip_x_low = val;

	retval = rmi_of_property_read_u32(dev, &val, "syna,clip-y-low", 1);
	if (retval)
	return retval;

	pdata->axis_align.clip_y_low = val;

	retval = rmi_of_property_read_u32(dev, &val, "syna,clip-x-high", 1);
	if (retval)
	return retval;

	pdata->axis_align.clip_x_high = val;

	retval = rmi_of_property_read_u32(dev, &val, "syna,clip-y-high", 1);
	if (retval)
	return retval;

	pdata->axis_align.clip_y_high = val;

	retval = rmi_of_property_read_u32(dev, &val, "syna,offset-x", 1);
	if (retval)
	return retval;

	pdata->axis_align.offset_x = val;

	retval = rmi_of_property_read_u32(dev, &val, "syna,offset-y", 1);
	if (retval)
	return retval;

	pdata->axis_align.offset_y = val;

	retval = rmi_of_property_read_u32(dev, &val, "syna,delta-x-threshold",
	1);
	if (retval)
	return retval;

	pdata->axis_align.delta_x_threshold = val;

	retval = rmi_of_property_read_u32(dev, &val, "syna,delta-y-threshold",
	1);
	if (retval)
	return retval;

	pdata->axis_align.delta_y_threshold = val;

	retval = rmi_of_property_read_u32(dev, (u32 *)&pdata->sensor_type,
	"syna,sensor-type", 1);
	if (retval)
	return retval;

	retval = rmi_of_property_read_u32(dev, &val, "touchscreen-x-mm", 1);
	if (retval)
	return retval;

	pdata->x_mm = val;

	retval = rmi_of_property_read_u32(dev, &val, "touchscreen-y-mm", 1);
	if (retval)
	return retval;

	pdata->y_mm = val;

	retval = rmi_of_property_read_u32(dev, &val,
	"syna,disable-report-mask", 1);
	if (retval)
	return retval;

	pdata->disable_report_mask = val;

	retval = rmi_of_property_read_u32(dev, &val, "syna,rezero-wait-ms",
	1);
	if (retval)
	return retval;

	pdata->rezero_wait = val;

	return 0;
	}
	#else
	inline int rmi_2d_sensor_of_probe(struct device *dev,
	struct rmi_2d_sensor_platform_data *pdata)
	{
	return -ENODEV;
	}
	#endif
	EXPORT_SYMBOL_GPL(rmi_2d_sensor_of_probe);