drivers/input/rmi4/rmi_2d_sensor.c

   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                         swap(sensor->axis_align.clip_x_low,
 150                              sensor->axis_align.clip_y_low);
 151                         swap(sensor->axis_align.clip_x_high,
 152                              sensor->axis_align.clip_y_high);
 153                 }
 154
 155                 sensor->min_x = sensor->axis_align.clip_x_low;
 156                 if (sensor->axis_align.clip_x_high)
 157                         sensor->max_x = min(sensor->max_x,
 158                                 sensor->axis_align.clip_x_high);
 159
 160                 sensor->min_y = sensor->axis_align.clip_y_low;
 161                 if (sensor->axis_align.clip_y_high)
 162                         sensor->max_y = min(sensor->max_y,
 163                                 sensor->axis_align.clip_y_high);
 164
 165                 set_bit(EV_ABS, input->evbit);
 166                 input_set_abs_params(input, ABS_MT_POSITION_X, 0, sensor->max_x,
 167                                         0, 0);
 168                 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, sensor->max_y,
 169                                         0, 0);
 170
 171                 if (sensor->x_mm && sensor->y_mm) {
 172                         res_x = (sensor->max_x - sensor->min_x) / sensor->x_mm;
 173                         res_y = (sensor->max_y - sensor->min_y) / sensor->y_mm;
 174
 175                         input_abs_set_res(input, ABS_X, res_x);
 176                         input_abs_set_res(input, ABS_Y, res_y);
 177
 178                         input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
 179                         input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
 180
 181                         if (!sensor->dmax)
 182                                 sensor->dmax = DMAX * res_x;
 183                 }
 184
 185                 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0);
 186                 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0);
 187                 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0);
 188                 input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
 189                 input_set_abs_params(input, ABS_MT_TOOL_TYPE,
 190                                      0, MT_TOOL_MAX, 0, 0);
 191
 192                 if (sensor->sensor_type == rmi_sensor_touchpad)
 193                         input_flags = INPUT_MT_POINTER;
 194                 else
 195                         input_flags = INPUT_MT_DIRECT;
 196
 197                 if (sensor->kernel_tracking)
 198                         input_flags |= INPUT_MT_TRACK;
 199
 200                 input_mt_init_slots(input, sensor->nbr_fingers, input_flags);
 201         }
 202
 203         if (sensor->report_rel) {
 204                 set_bit(EV_REL, input->evbit);
 205                 set_bit(REL_X, input->relbit);
 206                 set_bit(REL_Y, input->relbit);
 207         }
 208
 209         if (sensor->topbuttonpad)
 210                 set_bit(INPUT_PROP_TOPBUTTONPAD, input->propbit);
 211 }
 212 EXPORT_SYMBOL_GPL(rmi_2d_sensor_set_input_params);
 213
 214 int rmi_2d_sensor_configure_input(struct rmi_function *fn,
 215                                         struct rmi_2d_sensor *sensor)
 216 {
 217         struct rmi_device *rmi_dev = fn->rmi_dev;
 218         struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
 219
 220         if (!drv_data->input)
 221                 return -ENODEV;
 222
 223         sensor->input = drv_data->input;
 224         rmi_2d_sensor_set_input_params(sensor);
 225
 226         return 0;
 227 }
 228 EXPORT_SYMBOL_GPL(rmi_2d_sensor_configure_input);
 229
 230 #ifdef CONFIG_OF
 231 int rmi_2d_sensor_of_probe(struct device *dev,
 232                         struct rmi_2d_sensor_platform_data *pdata)
 233 {
 234         int retval;
 235         u32 val;
 236
 237         pdata->axis_align.swap_axes = of_property_read_bool(dev->of_node,
 238                                                 "touchscreen-swapped-x-y");
 239
 240         pdata->axis_align.flip_x = of_property_read_bool(dev->of_node,
 241                                                 "touchscreen-inverted-x");
 242
 243         pdata->axis_align.flip_y = of_property_read_bool(dev->of_node,
 244                                                 "touchscreen-inverted-y");
 245
 246         retval = rmi_of_property_read_u32(dev, &val, "syna,clip-x-low", 1);
 247         if (retval)
 248                 return retval;
 249
 250         pdata->axis_align.clip_x_low = val;
 251
 252         retval = rmi_of_property_read_u32(dev, &val, "syna,clip-y-low", 1);
 253         if (retval)
 254                 return retval;
 255
 256         pdata->axis_align.clip_y_low = val;
 257
 258         retval = rmi_of_property_read_u32(dev, &val, "syna,clip-x-high", 1);
 259         if (retval)
 260                 return retval;
 261
 262         pdata->axis_align.clip_x_high = val;
 263
 264         retval = rmi_of_property_read_u32(dev, &val, "syna,clip-y-high", 1);
 265         if (retval)
 266                 return retval;
 267
 268         pdata->axis_align.clip_y_high = val;
 269
 270         retval = rmi_of_property_read_u32(dev, &val, "syna,offset-x", 1);
 271         if (retval)
 272                 return retval;
 273
 274         pdata->axis_align.offset_x = val;
 275
 276         retval = rmi_of_property_read_u32(dev, &val, "syna,offset-y", 1);
 277         if (retval)
 278                 return retval;
 279
 280         pdata->axis_align.offset_y = val;
 281
 282         retval = rmi_of_property_read_u32(dev, &val, "syna,delta-x-threshold",
 283                                                 1);
 284         if (retval)
 285                 return retval;
 286
 287         pdata->axis_align.delta_x_threshold = val;
 288
 289         retval = rmi_of_property_read_u32(dev, &val, "syna,delta-y-threshold",
 290                                                 1);
 291         if (retval)
 292                 return retval;
 293
 294         pdata->axis_align.delta_y_threshold = val;
 295
 296         retval = rmi_of_property_read_u32(dev, (u32 *)&pdata->sensor_type,
 297                         "syna,sensor-type", 1);
 298         if (retval)
 299                 return retval;
 300
 301         retval = rmi_of_property_read_u32(dev, &val, "touchscreen-x-mm", 1);
 302         if (retval)
 303                 return retval;
 304
 305         pdata->x_mm = val;
 306
 307         retval = rmi_of_property_read_u32(dev, &val, "touchscreen-y-mm", 1);
 308         if (retval)
 309                 return retval;
 310
 311         pdata->y_mm = val;
 312
 313         retval = rmi_of_property_read_u32(dev, &val,
 314                                 "syna,disable-report-mask", 1);
 315         if (retval)
 316                 return retval;
 317
 318         pdata->disable_report_mask = val;
 319
 320         retval = rmi_of_property_read_u32(dev, &val, "syna,rezero-wait-ms",
 321                                                 1);
 322         if (retval)
 323                 return retval;
 324
 325         pdata->rezero_wait = val;
 326
 327         return 0;
 328 }
 329 #else
 330 inline int rmi_2d_sensor_of_probe(struct device *dev,
 331                         struct rmi_2d_sensor_platform_data *pdata)
 332 {
 333         return -ENODEV;
 334 }
 335 #endif
 336 EXPORT_SYMBOL_GPL(rmi_2d_sensor_of_probe);