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| 1 | +/* |
| 2 | + * Copyright (c) 2011-2016 Synaptics Incorporated |
| 3 | + * Copyright (c) 2011 Unixphere |
| 4 | + * |
| 5 | + * This program is free software; you can redistribute it and/or modify it |
| 6 | + * under the terms of the GNU General Public License version 2 as published by |
| 7 | + * the Free Software Foundation. |
| 8 | + */ |
| 9 | + |
| 10 | +#include <linux/kernel.h> |
| 11 | +#include <linux/device.h> |
| 12 | +#include <linux/of.h> |
| 13 | +#include <linux/input.h> |
| 14 | +#include <linux/input/mt.h> |
| 15 | +#include <linux/rmi.h> |
| 16 | +#include "rmi_driver.h" |
| 17 | +#include "rmi_2d_sensor.h" |
| 18 | + |
| 19 | +#define RMI_2D_REL_POS_MIN -128 |
| 20 | +#define RMI_2D_REL_POS_MAX 127 |
| 21 | + |
| 22 | +/* maximum ABS_MT_POSITION displacement (in mm) */ |
| 23 | +#define DMAX 10 |
| 24 | + |
| 25 | +void rmi_2d_sensor_abs_process(struct rmi_2d_sensor *sensor, |
| 26 | + struct rmi_2d_sensor_abs_object *obj, |
| 27 | + int slot) |
| 28 | +{ |
| 29 | + struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align; |
| 30 | + |
| 31 | + /* we keep the previous values if the finger is released */ |
| 32 | + if (obj->type == RMI_2D_OBJECT_NONE) |
| 33 | + return; |
| 34 | + |
| 35 | + if (axis_align->swap_axes) |
| 36 | + swap(obj->x, obj->y); |
| 37 | + |
| 38 | + if (axis_align->flip_x) |
| 39 | + obj->x = sensor->max_x - obj->x; |
| 40 | + |
| 41 | + if (axis_align->flip_y) |
| 42 | + obj->y = sensor->max_y - obj->y; |
| 43 | + |
| 44 | + /* |
| 45 | + * Here checking if X offset or y offset are specified is |
| 46 | + * redundant. We just add the offsets or clip the values. |
| 47 | + * |
| 48 | + * Note: offsets need to be applied before clipping occurs, |
| 49 | + * or we could get funny values that are outside of |
| 50 | + * clipping boundaries. |
| 51 | + */ |
| 52 | + obj->x += axis_align->offset_x; |
| 53 | + obj->y += axis_align->offset_y; |
| 54 | + |
| 55 | + obj->x = max(axis_align->clip_x_low, obj->x); |
| 56 | + obj->y = max(axis_align->clip_y_low, obj->y); |
| 57 | + |
| 58 | + if (axis_align->clip_x_high) |
| 59 | + obj->x = min(sensor->max_x, obj->x); |
| 60 | + |
| 61 | + if (axis_align->clip_y_high) |
| 62 | + obj->y = min(sensor->max_y, obj->y); |
| 63 | + |
| 64 | + sensor->tracking_pos[slot].x = obj->x; |
| 65 | + sensor->tracking_pos[slot].y = obj->y; |
| 66 | +} |
| 67 | +EXPORT_SYMBOL_GPL(rmi_2d_sensor_abs_process); |
| 68 | + |
| 69 | +void rmi_2d_sensor_abs_report(struct rmi_2d_sensor *sensor, |
| 70 | + struct rmi_2d_sensor_abs_object *obj, |
| 71 | + int slot) |
| 72 | +{ |
| 73 | + struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align; |
| 74 | + struct input_dev *input = sensor->input; |
| 75 | + int wide, major, minor; |
| 76 | + |
| 77 | + if (sensor->kernel_tracking) |
| 78 | + input_mt_slot(input, sensor->tracking_slots[slot]); |
| 79 | + else |
| 80 | + input_mt_slot(input, slot); |
| 81 | + |
| 82 | + input_mt_report_slot_state(input, obj->mt_tool, |
| 83 | + obj->type != RMI_2D_OBJECT_NONE); |
| 84 | + |
| 85 | + if (obj->type != RMI_2D_OBJECT_NONE) { |
| 86 | + obj->x = sensor->tracking_pos[slot].x; |
| 87 | + obj->y = sensor->tracking_pos[slot].y; |
| 88 | + |
| 89 | + if (axis_align->swap_axes) |
| 90 | + swap(obj->wx, obj->wy); |
| 91 | + |
| 92 | + wide = (obj->wx > obj->wy); |
| 93 | + major = max(obj->wx, obj->wy); |
| 94 | + minor = min(obj->wx, obj->wy); |
| 95 | + |
| 96 | + if (obj->type == RMI_2D_OBJECT_STYLUS) { |
| 97 | + major = max(1, major); |
| 98 | + minor = max(1, minor); |
| 99 | + } |
| 100 | + |
| 101 | + input_event(sensor->input, EV_ABS, ABS_MT_POSITION_X, obj->x); |
| 102 | + input_event(sensor->input, EV_ABS, ABS_MT_POSITION_Y, obj->y); |
| 103 | + input_event(sensor->input, EV_ABS, ABS_MT_ORIENTATION, wide); |
| 104 | + input_event(sensor->input, EV_ABS, ABS_MT_PRESSURE, obj->z); |
| 105 | + input_event(sensor->input, EV_ABS, ABS_MT_TOUCH_MAJOR, major); |
| 106 | + input_event(sensor->input, EV_ABS, ABS_MT_TOUCH_MINOR, minor); |
| 107 | + |
| 108 | + rmi_dbg(RMI_DEBUG_2D_SENSOR, &sensor->input->dev, |
| 109 | + "%s: obj[%d]: type: 0x%02x X: %d Y: %d Z: %d WX: %d WY: %d\n", |
| 110 | + __func__, slot, obj->type, obj->x, obj->y, obj->z, |
| 111 | + obj->wx, obj->wy); |
| 112 | + } |
| 113 | +} |
| 114 | +EXPORT_SYMBOL_GPL(rmi_2d_sensor_abs_report); |
| 115 | + |
| 116 | +void rmi_2d_sensor_rel_report(struct rmi_2d_sensor *sensor, int x, int y) |
| 117 | +{ |
| 118 | + struct rmi_2d_axis_alignment *axis_align = &sensor->axis_align; |
| 119 | + |
| 120 | + x = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)x)); |
| 121 | + y = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)y)); |
| 122 | + |
| 123 | + if (axis_align->swap_axes) |
| 124 | + swap(x, y); |
| 125 | + |
| 126 | + if (axis_align->flip_x) |
| 127 | + x = min(RMI_2D_REL_POS_MAX, -x); |
| 128 | + |
| 129 | + if (axis_align->flip_y) |
| 130 | + y = min(RMI_2D_REL_POS_MAX, -y); |
| 131 | + |
| 132 | + if (x || y) { |
| 133 | + input_report_rel(sensor->input, REL_X, x); |
| 134 | + input_report_rel(sensor->input, REL_Y, y); |
| 135 | + } |
| 136 | +} |
| 137 | +EXPORT_SYMBOL_GPL(rmi_2d_sensor_rel_report); |
| 138 | + |
| 139 | +static void rmi_2d_sensor_set_input_params(struct rmi_2d_sensor *sensor) |
| 140 | +{ |
| 141 | + struct input_dev *input = sensor->input; |
| 142 | + int res_x; |
| 143 | + int res_y; |
| 144 | + int input_flags = 0; |
| 145 | + |
| 146 | + if (sensor->report_abs) { |
| 147 | + if (sensor->axis_align.swap_axes) |
| 148 | + swap(sensor->max_x, sensor->max_y); |
| 149 | + |
| 150 | + sensor->min_x = sensor->axis_align.clip_x_low; |
| 151 | + if (sensor->axis_align.clip_x_high) |
| 152 | + sensor->max_x = min(sensor->max_x, |
| 153 | + sensor->axis_align.clip_x_high); |
| 154 | + |
| 155 | + sensor->min_y = sensor->axis_align.clip_y_low; |
| 156 | + if (sensor->axis_align.clip_y_high) |
| 157 | + sensor->max_y = min(sensor->max_y, |
| 158 | + sensor->axis_align.clip_y_high); |
| 159 | + |
| 160 | + set_bit(EV_ABS, input->evbit); |
| 161 | + input_set_abs_params(input, ABS_MT_POSITION_X, 0, sensor->max_x, |
| 162 | + 0, 0); |
| 163 | + input_set_abs_params(input, ABS_MT_POSITION_Y, 0, sensor->max_y, |
| 164 | + 0, 0); |
| 165 | + |
| 166 | + if (sensor->x_mm && sensor->y_mm) { |
| 167 | + res_x = (sensor->max_x - sensor->min_x) / sensor->x_mm; |
| 168 | + res_y = (sensor->max_y - sensor->min_y) / sensor->y_mm; |
| 169 | + |
| 170 | + input_abs_set_res(input, ABS_X, res_x); |
| 171 | + input_abs_set_res(input, ABS_Y, res_y); |
| 172 | + |
| 173 | + input_abs_set_res(input, ABS_MT_POSITION_X, res_x); |
| 174 | + input_abs_set_res(input, ABS_MT_POSITION_Y, res_y); |
| 175 | + |
| 176 | + if (!sensor->dmax) |
| 177 | + sensor->dmax = DMAX * res_x; |
| 178 | + } |
| 179 | + |
| 180 | + input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0); |
| 181 | + input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0); |
| 182 | + input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0); |
| 183 | + input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0); |
| 184 | + |
| 185 | + if (sensor->sensor_type == rmi_sensor_touchpad) |
| 186 | + input_flags = INPUT_MT_POINTER; |
| 187 | + else |
| 188 | + input_flags = INPUT_MT_DIRECT; |
| 189 | + |
| 190 | + if (sensor->kernel_tracking) |
| 191 | + input_flags |= INPUT_MT_TRACK; |
| 192 | + |
| 193 | + input_mt_init_slots(input, sensor->nbr_fingers, input_flags); |
| 194 | + } |
| 195 | + |
| 196 | + if (sensor->report_rel) { |
| 197 | + set_bit(EV_REL, input->evbit); |
| 198 | + set_bit(REL_X, input->relbit); |
| 199 | + set_bit(REL_Y, input->relbit); |
| 200 | + } |
| 201 | + |
| 202 | + if (sensor->topbuttonpad) |
| 203 | + set_bit(INPUT_PROP_TOPBUTTONPAD, input->propbit); |
| 204 | +} |
| 205 | +EXPORT_SYMBOL_GPL(rmi_2d_sensor_set_input_params); |
| 206 | + |
| 207 | +int rmi_2d_sensor_configure_input(struct rmi_function *fn, |
| 208 | + struct rmi_2d_sensor *sensor) |
| 209 | +{ |
| 210 | + struct rmi_device *rmi_dev = fn->rmi_dev; |
| 211 | + struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev); |
| 212 | + |
| 213 | + if (!drv_data->input) |
| 214 | + return -ENODEV; |
| 215 | + |
| 216 | + sensor->input = drv_data->input; |
| 217 | + rmi_2d_sensor_set_input_params(sensor); |
| 218 | + |
| 219 | + return 0; |
| 220 | +} |
| 221 | +EXPORT_SYMBOL_GPL(rmi_2d_sensor_configure_input); |
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