Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2012 Jonas Ådahl |
| 3 | * |
| 4 | * Permission to use, copy, modify, distribute, and sell this software and |
| 5 | * its documentation for any purpose is hereby granted without fee, provided |
| 6 | * that the above copyright notice appear in all copies and that both that |
| 7 | * copyright notice and this permission notice appear in supporting |
| 8 | * documentation, and that the name of the copyright holders not be used in |
| 9 | * advertising or publicity pertaining to distribution of the software |
| 10 | * without specific, written prior permission. The copyright holders make |
| 11 | * no representations about the suitability of this software for any |
| 12 | * purpose. It is provided "as is" without express or implied warranty. |
| 13 | * |
| 14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS |
| 15 | * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 16 | * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 17 | * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER |
| 18 | * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF |
| 19 | * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 20 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 21 | */ |
| 22 | |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 23 | #include <stdlib.h> |
| 24 | #include <math.h> |
| 25 | #include <string.h> |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 26 | #include <stdbool.h> |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 27 | #include <linux/input.h> |
| 28 | |
| 29 | #include "filter.h" |
Pekka Paalanen | cfa1f67 | 2012-08-03 14:38:59 +0300 | [diff] [blame] | 30 | #include "evdev.h" |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 31 | |
| 32 | /* Default values */ |
| 33 | #define DEFAULT_CONSTANT_ACCEL_NUMERATOR 50 |
| 34 | #define DEFAULT_MIN_ACCEL_FACTOR 0.16 |
| 35 | #define DEFAULT_MAX_ACCEL_FACTOR 1.0 |
| 36 | #define DEFAULT_HYSTERESIS_MARGIN_DENOMINATOR 700.0 |
| 37 | |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 38 | #define DEFAULT_TOUCHPAD_SINGLE_TAP_BUTTON BTN_LEFT |
| 39 | #define DEFAULT_TOUCHPAD_SINGLE_TAP_TIMEOUT 100 |
| 40 | |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 41 | enum touchpad_model { |
| 42 | TOUCHPAD_MODEL_UNKNOWN = 0, |
| 43 | TOUCHPAD_MODEL_SYNAPTICS, |
| 44 | TOUCHPAD_MODEL_ALPS, |
| 45 | TOUCHPAD_MODEL_APPLETOUCH, |
| 46 | TOUCHPAD_MODEL_ELANTECH |
| 47 | }; |
| 48 | |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 49 | enum touchpad_event { |
| 50 | TOUCHPAD_EVENT_NONE = 0, |
| 51 | TOUCHPAD_EVENT_ABSOLUTE_ANY = (1 << 0), |
| 52 | TOUCHPAD_EVENT_ABSOLUTE_X = (1 << 1), |
| 53 | TOUCHPAD_EVENT_ABSOLUTE_Y = (1 << 2), |
| 54 | TOUCHPAD_EVENT_REPORT = (1 << 3) |
| 55 | }; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 56 | |
| 57 | struct touchpad_model_spec { |
| 58 | short vendor; |
| 59 | short product; |
| 60 | enum touchpad_model model; |
| 61 | }; |
| 62 | |
| 63 | static struct touchpad_model_spec touchpad_spec_table[] = { |
| 64 | {0x0002, 0x0007, TOUCHPAD_MODEL_SYNAPTICS}, |
| 65 | {0x0002, 0x0008, TOUCHPAD_MODEL_ALPS}, |
| 66 | {0x05ac, 0x0000, TOUCHPAD_MODEL_APPLETOUCH}, |
| 67 | {0x0002, 0x000e, TOUCHPAD_MODEL_ELANTECH}, |
| 68 | {0x0000, 0x0000, TOUCHPAD_MODEL_UNKNOWN} |
| 69 | }; |
| 70 | |
| 71 | enum touchpad_state { |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 72 | TOUCHPAD_STATE_NONE = 0, |
| 73 | TOUCHPAD_STATE_TOUCH = (1 << 0), |
| 74 | TOUCHPAD_STATE_MOVE = (1 << 1) |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 75 | }; |
| 76 | |
| 77 | #define TOUCHPAD_HISTORY_LENGTH 4 |
| 78 | |
| 79 | struct touchpad_motion { |
| 80 | int32_t x; |
| 81 | int32_t y; |
| 82 | }; |
| 83 | |
| 84 | enum touchpad_fingers_state { |
| 85 | TOUCHPAD_FINGERS_ONE = (1 << 0), |
| 86 | TOUCHPAD_FINGERS_TWO = (1 << 1), |
| 87 | TOUCHPAD_FINGERS_THREE = (1 << 2) |
| 88 | }; |
| 89 | |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 90 | enum fsm_event { |
| 91 | FSM_EVENT_TOUCH, |
| 92 | FSM_EVENT_RELEASE, |
| 93 | FSM_EVENT_MOTION, |
| 94 | FSM_EVENT_TIMEOUT |
| 95 | }; |
| 96 | |
| 97 | enum fsm_state { |
| 98 | FSM_IDLE, |
| 99 | FSM_TOUCH, |
| 100 | FSM_TAP, |
| 101 | FSM_TAP_2, |
| 102 | FSM_DRAG |
| 103 | }; |
| 104 | |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 105 | struct touchpad_dispatch { |
| 106 | struct evdev_dispatch base; |
Pekka Paalanen | 3eb4761 | 2012-08-06 14:57:08 +0300 | [diff] [blame] | 107 | struct evdev_device *device; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 108 | |
| 109 | enum touchpad_model model; |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 110 | unsigned int state; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 111 | int finger_state; |
| 112 | int last_finger_state; |
| 113 | |
| 114 | double constant_accel_factor; |
| 115 | double min_accel_factor; |
| 116 | double max_accel_factor; |
| 117 | |
| 118 | unsigned int event_mask; |
| 119 | unsigned int event_mask_filter; |
| 120 | |
| 121 | int reset; |
| 122 | |
| 123 | struct { |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 124 | struct wl_array events; |
| 125 | enum fsm_state state; |
| 126 | struct wl_event_source *timer_source; |
| 127 | } fsm; |
| 128 | |
| 129 | struct { |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 130 | int32_t x; |
| 131 | int32_t y; |
| 132 | } hw_abs; |
| 133 | |
| 134 | int has_pressure; |
| 135 | struct { |
| 136 | int32_t touch_low; |
| 137 | int32_t touch_high; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 138 | } pressure; |
| 139 | |
| 140 | struct { |
| 141 | int32_t margin_x; |
| 142 | int32_t margin_y; |
| 143 | int32_t center_x; |
| 144 | int32_t center_y; |
| 145 | } hysteresis; |
| 146 | |
| 147 | struct touchpad_motion motion_history[TOUCHPAD_HISTORY_LENGTH]; |
| 148 | int motion_index; |
| 149 | unsigned int motion_count; |
| 150 | |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 151 | struct weston_motion_filter *filter; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 152 | }; |
| 153 | |
| 154 | static enum touchpad_model |
Pekka Paalanen | 3eb4761 | 2012-08-06 14:57:08 +0300 | [diff] [blame] | 155 | get_touchpad_model(struct evdev_device *device) |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 156 | { |
| 157 | struct input_id id; |
| 158 | unsigned int i; |
| 159 | |
| 160 | if (ioctl(device->fd, EVIOCGID, &id) < 0) |
| 161 | return TOUCHPAD_MODEL_UNKNOWN; |
| 162 | |
Rob Bradford | ec913fd | 2012-10-09 18:44:32 +0100 | [diff] [blame] | 163 | for (i = 0; ARRAY_LENGTH(touchpad_spec_table); i++) |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 164 | if (touchpad_spec_table[i].vendor == id.vendor && |
| 165 | (!touchpad_spec_table[i].product || |
| 166 | touchpad_spec_table[i].product == id.product)) |
| 167 | return touchpad_spec_table[i].model; |
| 168 | |
| 169 | return TOUCHPAD_MODEL_UNKNOWN; |
| 170 | } |
| 171 | |
| 172 | static void |
| 173 | configure_touchpad_pressure(struct touchpad_dispatch *touchpad, |
| 174 | int32_t pressure_min, int32_t pressure_max) |
| 175 | { |
| 176 | int32_t range = pressure_max - pressure_min + 1; |
| 177 | |
| 178 | touchpad->has_pressure = 1; |
| 179 | |
| 180 | /* Magic numbers from xf86-input-synaptics */ |
| 181 | switch (touchpad->model) { |
| 182 | case TOUCHPAD_MODEL_ELANTECH: |
| 183 | touchpad->pressure.touch_low = pressure_min + 1; |
| 184 | touchpad->pressure.touch_high = pressure_min + 1; |
| 185 | break; |
| 186 | default: |
| 187 | touchpad->pressure.touch_low = |
| 188 | pressure_min + range * (25.0/256.0); |
| 189 | touchpad->pressure.touch_high = |
| 190 | pressure_min + range * (30.0/256.0); |
| 191 | } |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | static double |
| 195 | touchpad_profile(struct weston_motion_filter *filter, |
| 196 | void *data, |
| 197 | double velocity, |
| 198 | uint32_t time) |
| 199 | { |
| 200 | struct touchpad_dispatch *touchpad = |
| 201 | (struct touchpad_dispatch *) data; |
| 202 | |
| 203 | double accel_factor; |
| 204 | |
| 205 | accel_factor = velocity * touchpad->constant_accel_factor; |
| 206 | |
| 207 | if (accel_factor > touchpad->max_accel_factor) |
| 208 | accel_factor = touchpad->max_accel_factor; |
| 209 | else if (accel_factor < touchpad->min_accel_factor) |
| 210 | accel_factor = touchpad->min_accel_factor; |
| 211 | |
| 212 | return accel_factor; |
| 213 | } |
| 214 | |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 215 | static inline struct touchpad_motion * |
| 216 | motion_history_offset(struct touchpad_dispatch *touchpad, int offset) |
| 217 | { |
| 218 | int offset_index = |
| 219 | (touchpad->motion_index - offset + TOUCHPAD_HISTORY_LENGTH) % |
| 220 | TOUCHPAD_HISTORY_LENGTH; |
| 221 | |
| 222 | return &touchpad->motion_history[offset_index]; |
| 223 | } |
| 224 | |
| 225 | static double |
| 226 | estimate_delta(int x0, int x1, int x2, int x3) |
| 227 | { |
| 228 | return (x0 + x1 - x2 - x3) / 4; |
| 229 | } |
| 230 | |
| 231 | static int |
| 232 | hysteresis(int in, int center, int margin) |
| 233 | { |
| 234 | int diff = in - center; |
| 235 | if (abs(diff) <= margin) |
| 236 | return center; |
| 237 | |
| 238 | if (diff > margin) |
| 239 | return center + diff - margin; |
| 240 | else if (diff < -margin) |
| 241 | return center + diff + margin; |
| 242 | return center + diff; |
| 243 | } |
| 244 | |
| 245 | static void |
| 246 | touchpad_get_delta(struct touchpad_dispatch *touchpad, double *dx, double *dy) |
| 247 | { |
| 248 | *dx = estimate_delta(motion_history_offset(touchpad, 0)->x, |
| 249 | motion_history_offset(touchpad, 1)->x, |
| 250 | motion_history_offset(touchpad, 2)->x, |
| 251 | motion_history_offset(touchpad, 3)->x); |
| 252 | *dy = estimate_delta(motion_history_offset(touchpad, 0)->y, |
| 253 | motion_history_offset(touchpad, 1)->y, |
| 254 | motion_history_offset(touchpad, 2)->y, |
| 255 | motion_history_offset(touchpad, 3)->y); |
| 256 | } |
| 257 | |
| 258 | static void |
| 259 | filter_motion(struct touchpad_dispatch *touchpad, |
| 260 | double *dx, double *dy, uint32_t time) |
| 261 | { |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 262 | struct weston_motion_params motion; |
| 263 | |
| 264 | motion.dx = *dx; |
| 265 | motion.dy = *dy; |
| 266 | |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 267 | weston_filter_dispatch(touchpad->filter, &motion, touchpad, time); |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 268 | |
| 269 | *dx = motion.dx; |
| 270 | *dy = motion.dy; |
| 271 | } |
| 272 | |
| 273 | static void |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 274 | notify_button_pressed(struct touchpad_dispatch *touchpad, uint32_t time) |
| 275 | { |
| 276 | notify_button(touchpad->device->seat, time, |
| 277 | DEFAULT_TOUCHPAD_SINGLE_TAP_BUTTON, |
| 278 | WL_POINTER_BUTTON_STATE_PRESSED); |
| 279 | } |
| 280 | |
| 281 | static void |
| 282 | notify_button_released(struct touchpad_dispatch *touchpad, uint32_t time) |
| 283 | { |
| 284 | notify_button(touchpad->device->seat, time, |
| 285 | DEFAULT_TOUCHPAD_SINGLE_TAP_BUTTON, |
| 286 | WL_POINTER_BUTTON_STATE_RELEASED); |
| 287 | } |
| 288 | |
| 289 | static void |
| 290 | notify_tap(struct touchpad_dispatch *touchpad, uint32_t time) |
| 291 | { |
| 292 | notify_button_pressed(touchpad, time); |
| 293 | notify_button_released(touchpad, time); |
| 294 | } |
| 295 | |
| 296 | static void |
| 297 | process_fsm_events(struct touchpad_dispatch *touchpad, uint32_t time) |
| 298 | { |
| 299 | uint32_t timeout = UINT32_MAX; |
| 300 | enum fsm_event *pevent; |
| 301 | enum fsm_event event; |
| 302 | |
| 303 | if (touchpad->fsm.events.size == 0) |
| 304 | return; |
| 305 | |
| 306 | wl_array_for_each(pevent, &touchpad->fsm.events) { |
| 307 | event = *pevent; |
| 308 | timeout = 0; |
| 309 | |
| 310 | switch (touchpad->fsm.state) { |
| 311 | case FSM_IDLE: |
| 312 | switch (event) { |
| 313 | case FSM_EVENT_TOUCH: |
| 314 | touchpad->fsm.state = FSM_TOUCH; |
| 315 | break; |
| 316 | default: |
| 317 | break; |
| 318 | } |
| 319 | break; |
| 320 | case FSM_TOUCH: |
| 321 | switch (event) { |
| 322 | case FSM_EVENT_RELEASE: |
| 323 | timeout = DEFAULT_TOUCHPAD_SINGLE_TAP_TIMEOUT; |
| 324 | touchpad->fsm.state = FSM_TAP; |
| 325 | break; |
| 326 | default: |
| 327 | touchpad->fsm.state = FSM_IDLE; |
| 328 | break; |
| 329 | } |
| 330 | break; |
| 331 | case FSM_TAP: |
| 332 | switch (event) { |
| 333 | case FSM_EVENT_TIMEOUT: |
| 334 | notify_tap(touchpad, time); |
| 335 | touchpad->fsm.state = FSM_IDLE; |
| 336 | break; |
| 337 | case FSM_EVENT_TOUCH: |
| 338 | notify_button_pressed(touchpad, time); |
| 339 | touchpad->fsm.state = FSM_TAP_2; |
| 340 | break; |
| 341 | default: |
| 342 | touchpad->fsm.state = FSM_IDLE; |
| 343 | break; |
| 344 | } |
| 345 | break; |
| 346 | case FSM_TAP_2: |
| 347 | switch (event) { |
| 348 | case FSM_EVENT_MOTION: |
| 349 | touchpad->fsm.state = FSM_DRAG; |
| 350 | break; |
| 351 | case FSM_EVENT_RELEASE: |
| 352 | notify_button_released(touchpad, time); |
| 353 | notify_tap(touchpad, time); |
| 354 | touchpad->fsm.state = FSM_IDLE; |
| 355 | break; |
| 356 | default: |
| 357 | touchpad->fsm.state = FSM_IDLE; |
| 358 | break; |
| 359 | } |
| 360 | break; |
| 361 | case FSM_DRAG: |
| 362 | switch (event) { |
| 363 | case FSM_EVENT_RELEASE: |
| 364 | notify_button_released(touchpad, time); |
| 365 | touchpad->fsm.state = FSM_IDLE; |
| 366 | break; |
| 367 | default: |
| 368 | touchpad->fsm.state = FSM_IDLE; |
| 369 | break; |
| 370 | } |
| 371 | break; |
| 372 | default: |
| 373 | weston_log("evdev-touchpad: Unknown state %d", |
| 374 | touchpad->fsm.state); |
| 375 | touchpad->fsm.state = FSM_IDLE; |
| 376 | break; |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | if (timeout != UINT32_MAX) |
| 381 | wl_event_source_timer_update(touchpad->fsm.timer_source, |
| 382 | timeout); |
| 383 | |
| 384 | wl_array_release(&touchpad->fsm.events); |
| 385 | wl_array_init(&touchpad->fsm.events); |
| 386 | } |
| 387 | |
| 388 | static void |
| 389 | push_fsm_event(struct touchpad_dispatch *touchpad, |
| 390 | enum fsm_event event) |
| 391 | { |
| 392 | enum fsm_event *pevent; |
| 393 | |
| 394 | pevent = wl_array_add(&touchpad->fsm.events, sizeof event); |
| 395 | if (pevent) |
| 396 | *pevent = event; |
| 397 | else |
| 398 | touchpad->fsm.state = FSM_IDLE; |
| 399 | } |
| 400 | |
| 401 | static int |
| 402 | fsm_timout_handler(void *data) |
| 403 | { |
| 404 | struct touchpad_dispatch *touchpad = data; |
| 405 | |
| 406 | if (touchpad->fsm.events.size == 0) { |
| 407 | push_fsm_event(touchpad, FSM_EVENT_TIMEOUT); |
| 408 | process_fsm_events(touchpad, weston_compositor_get_time()); |
| 409 | } |
| 410 | |
| 411 | return 1; |
| 412 | } |
| 413 | |
| 414 | static void |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 415 | touchpad_update_state(struct touchpad_dispatch *touchpad, uint32_t time) |
| 416 | { |
| 417 | int motion_index; |
| 418 | int center_x, center_y; |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 419 | double dx = 0.0, dy = 0.0; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 420 | |
| 421 | if (touchpad->reset || |
| 422 | touchpad->last_finger_state != touchpad->finger_state) { |
| 423 | touchpad->reset = 0; |
| 424 | touchpad->motion_count = 0; |
| 425 | touchpad->event_mask = TOUCHPAD_EVENT_NONE; |
| 426 | touchpad->event_mask_filter = |
| 427 | TOUCHPAD_EVENT_ABSOLUTE_X | TOUCHPAD_EVENT_ABSOLUTE_Y; |
| 428 | |
| 429 | touchpad->last_finger_state = touchpad->finger_state; |
| 430 | |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 431 | process_fsm_events(touchpad, time); |
| 432 | |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 433 | return; |
| 434 | } |
| 435 | touchpad->last_finger_state = touchpad->finger_state; |
| 436 | |
| 437 | if (!(touchpad->event_mask & TOUCHPAD_EVENT_REPORT)) |
| 438 | return; |
| 439 | else |
| 440 | touchpad->event_mask &= ~TOUCHPAD_EVENT_REPORT; |
| 441 | |
| 442 | if ((touchpad->event_mask & touchpad->event_mask_filter) != |
| 443 | touchpad->event_mask_filter) |
| 444 | return; |
| 445 | |
| 446 | touchpad->event_mask_filter = TOUCHPAD_EVENT_ABSOLUTE_ANY; |
| 447 | touchpad->event_mask = 0; |
| 448 | |
| 449 | /* Avoid noice by moving center only when delta reaches a threshold |
| 450 | * distance from the old center. */ |
| 451 | if (touchpad->motion_count > 0) { |
| 452 | center_x = hysteresis(touchpad->hw_abs.x, |
| 453 | touchpad->hysteresis.center_x, |
| 454 | touchpad->hysteresis.margin_x); |
| 455 | center_y = hysteresis(touchpad->hw_abs.y, |
| 456 | touchpad->hysteresis.center_y, |
| 457 | touchpad->hysteresis.margin_y); |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 458 | } else { |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 459 | center_x = touchpad->hw_abs.x; |
| 460 | center_y = touchpad->hw_abs.y; |
| 461 | } |
| 462 | touchpad->hysteresis.center_x = center_x; |
| 463 | touchpad->hysteresis.center_y = center_y; |
| 464 | touchpad->hw_abs.x = center_x; |
| 465 | touchpad->hw_abs.y = center_y; |
| 466 | |
| 467 | /* Update motion history tracker */ |
| 468 | motion_index = (touchpad->motion_index + 1) % TOUCHPAD_HISTORY_LENGTH; |
| 469 | touchpad->motion_index = motion_index; |
| 470 | touchpad->motion_history[motion_index].x = touchpad->hw_abs.x; |
| 471 | touchpad->motion_history[motion_index].y = touchpad->hw_abs.y; |
| 472 | if (touchpad->motion_count < 4) |
| 473 | touchpad->motion_count++; |
| 474 | |
| 475 | if (touchpad->motion_count >= 4) { |
| 476 | touchpad_get_delta(touchpad, &dx, &dy); |
| 477 | |
| 478 | filter_motion(touchpad, &dx, &dy, time); |
| 479 | |
Jonas Ådahl | d9f5819 | 2012-09-27 18:40:43 +0200 | [diff] [blame^] | 480 | if (touchpad->finger_state == TOUCHPAD_FINGERS_ONE) { |
| 481 | touchpad->device->rel.dx = wl_fixed_from_double(dx); |
| 482 | touchpad->device->rel.dy = wl_fixed_from_double(dy); |
| 483 | touchpad->device->pending_events |= |
| 484 | EVDEV_RELATIVE_MOTION; |
| 485 | } else if (touchpad->finger_state == TOUCHPAD_FINGERS_TWO) { |
| 486 | if (dx != 0.0) |
| 487 | notify_axis(touchpad->device->seat, |
| 488 | time, |
| 489 | WL_POINTER_AXIS_HORIZONTAL_SCROLL, |
| 490 | wl_fixed_from_double(dx)); |
| 491 | if (dy != 0.0) |
| 492 | notify_axis(touchpad->device->seat, |
| 493 | time, |
| 494 | WL_POINTER_AXIS_VERTICAL_SCROLL, |
| 495 | wl_fixed_from_double(dy)); |
| 496 | } |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 497 | } |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 498 | |
| 499 | if (!(touchpad->state & TOUCHPAD_STATE_MOVE) && |
| 500 | ((int)dx || (int)dy)) { |
| 501 | touchpad->state |= TOUCHPAD_STATE_MOVE; |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 502 | push_fsm_event(touchpad, FSM_EVENT_MOTION); |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 503 | } |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 504 | |
| 505 | process_fsm_events(touchpad, time); |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | static void |
| 509 | on_touch(struct touchpad_dispatch *touchpad) |
| 510 | { |
| 511 | touchpad->state |= TOUCHPAD_STATE_TOUCH; |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 512 | |
| 513 | push_fsm_event(touchpad, FSM_EVENT_TOUCH); |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | static void |
| 517 | on_release(struct touchpad_dispatch *touchpad) |
| 518 | { |
| 519 | |
| 520 | touchpad->reset = 1; |
| 521 | touchpad->state &= ~(TOUCHPAD_STATE_MOVE | TOUCHPAD_STATE_TOUCH); |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 522 | |
| 523 | push_fsm_event(touchpad, FSM_EVENT_RELEASE); |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 524 | } |
| 525 | |
| 526 | static inline void |
| 527 | process_absolute(struct touchpad_dispatch *touchpad, |
Pekka Paalanen | 3eb4761 | 2012-08-06 14:57:08 +0300 | [diff] [blame] | 528 | struct evdev_device *device, |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 529 | struct input_event *e) |
| 530 | { |
| 531 | switch (e->code) { |
| 532 | case ABS_PRESSURE: |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 533 | if (e->value > touchpad->pressure.touch_high && |
| 534 | !(touchpad->state & TOUCHPAD_STATE_TOUCH)) |
| 535 | on_touch(touchpad); |
| 536 | else if (e->value < touchpad->pressure.touch_low && |
| 537 | touchpad->state & TOUCHPAD_STATE_TOUCH) |
| 538 | on_release(touchpad); |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 539 | |
| 540 | break; |
| 541 | case ABS_X: |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 542 | if (touchpad->state & TOUCHPAD_STATE_TOUCH) { |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 543 | touchpad->hw_abs.x = e->value; |
| 544 | touchpad->event_mask |= TOUCHPAD_EVENT_ABSOLUTE_ANY; |
| 545 | touchpad->event_mask |= TOUCHPAD_EVENT_ABSOLUTE_X; |
| 546 | } |
| 547 | break; |
| 548 | case ABS_Y: |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 549 | if (touchpad->state & TOUCHPAD_STATE_TOUCH) { |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 550 | touchpad->hw_abs.y = e->value; |
| 551 | touchpad->event_mask |= TOUCHPAD_EVENT_ABSOLUTE_ANY; |
| 552 | touchpad->event_mask |= TOUCHPAD_EVENT_ABSOLUTE_Y; |
| 553 | } |
| 554 | break; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | static inline void |
| 559 | process_key(struct touchpad_dispatch *touchpad, |
Pekka Paalanen | 3eb4761 | 2012-08-06 14:57:08 +0300 | [diff] [blame] | 560 | struct evdev_device *device, |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 561 | struct input_event *e, |
| 562 | uint32_t time) |
| 563 | { |
| 564 | switch (e->code) { |
| 565 | case BTN_TOUCH: |
| 566 | if (!touchpad->has_pressure) { |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 567 | if (e->value && !(touchpad->state & TOUCHPAD_STATE_TOUCH)) |
| 568 | on_touch(touchpad); |
| 569 | else if (!e->value) |
| 570 | on_release(touchpad); |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 571 | } |
| 572 | break; |
| 573 | case BTN_LEFT: |
| 574 | case BTN_RIGHT: |
| 575 | case BTN_MIDDLE: |
| 576 | case BTN_SIDE: |
| 577 | case BTN_EXTRA: |
| 578 | case BTN_FORWARD: |
| 579 | case BTN_BACK: |
| 580 | case BTN_TASK: |
Kristian Høgsberg | cb3eaae | 2012-08-10 09:50:11 -0400 | [diff] [blame] | 581 | notify_button(device->seat, |
Daniel Stone | 4dbadb1 | 2012-05-30 16:31:51 +0100 | [diff] [blame] | 582 | time, e->code, |
| 583 | e->value ? WL_POINTER_BUTTON_STATE_PRESSED : |
| 584 | WL_POINTER_BUTTON_STATE_RELEASED); |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 585 | break; |
| 586 | case BTN_TOOL_PEN: |
| 587 | case BTN_TOOL_RUBBER: |
| 588 | case BTN_TOOL_BRUSH: |
| 589 | case BTN_TOOL_PENCIL: |
| 590 | case BTN_TOOL_AIRBRUSH: |
| 591 | case BTN_TOOL_MOUSE: |
| 592 | case BTN_TOOL_LENS: |
| 593 | touchpad->reset = 1; |
| 594 | break; |
| 595 | case BTN_TOOL_FINGER: |
Rob Bradford | 3de191e | 2012-10-09 18:44:29 +0100 | [diff] [blame] | 596 | if (e->value) |
| 597 | touchpad->finger_state |= TOUCHPAD_FINGERS_ONE; |
Jonas Ådahl | d9f5819 | 2012-09-27 18:40:43 +0200 | [diff] [blame^] | 598 | else |
| 599 | touchpad->finger_state &= ~TOUCHPAD_FINGERS_ONE; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 600 | break; |
| 601 | case BTN_TOOL_DOUBLETAP: |
Rob Bradford | 3de191e | 2012-10-09 18:44:29 +0100 | [diff] [blame] | 602 | if (e->value) |
| 603 | touchpad->finger_state |= TOUCHPAD_FINGERS_TWO; |
Jonas Ådahl | d9f5819 | 2012-09-27 18:40:43 +0200 | [diff] [blame^] | 604 | else |
| 605 | touchpad->finger_state &= ~TOUCHPAD_FINGERS_TWO; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 606 | break; |
| 607 | case BTN_TOOL_TRIPLETAP: |
Rob Bradford | 3de191e | 2012-10-09 18:44:29 +0100 | [diff] [blame] | 608 | if (e->value) |
| 609 | touchpad->finger_state |= TOUCHPAD_FINGERS_THREE; |
Jonas Ådahl | d9f5819 | 2012-09-27 18:40:43 +0200 | [diff] [blame^] | 610 | else |
| 611 | touchpad->finger_state &= ~TOUCHPAD_FINGERS_THREE; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 612 | break; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | static void |
| 617 | touchpad_process(struct evdev_dispatch *dispatch, |
Pekka Paalanen | 3eb4761 | 2012-08-06 14:57:08 +0300 | [diff] [blame] | 618 | struct evdev_device *device, |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 619 | struct input_event *e, |
| 620 | uint32_t time) |
| 621 | { |
| 622 | struct touchpad_dispatch *touchpad = |
| 623 | (struct touchpad_dispatch *) dispatch; |
| 624 | |
| 625 | switch (e->type) { |
| 626 | case EV_SYN: |
| 627 | if (e->code == SYN_REPORT) |
| 628 | touchpad->event_mask |= TOUCHPAD_EVENT_REPORT; |
| 629 | break; |
| 630 | case EV_ABS: |
| 631 | process_absolute(touchpad, device, e); |
| 632 | break; |
| 633 | case EV_KEY: |
| 634 | process_key(touchpad, device, e, time); |
| 635 | break; |
| 636 | } |
| 637 | |
| 638 | touchpad_update_state(touchpad, time); |
| 639 | } |
| 640 | |
| 641 | static void |
| 642 | touchpad_destroy(struct evdev_dispatch *dispatch) |
| 643 | { |
| 644 | struct touchpad_dispatch *touchpad = |
| 645 | (struct touchpad_dispatch *) dispatch; |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 646 | |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 647 | touchpad->filter->interface->destroy(touchpad->filter); |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 648 | wl_event_source_remove(touchpad->fsm.timer_source); |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 649 | free(dispatch); |
| 650 | } |
| 651 | |
| 652 | struct evdev_dispatch_interface touchpad_interface = { |
| 653 | touchpad_process, |
| 654 | touchpad_destroy |
| 655 | }; |
| 656 | |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 657 | static int |
| 658 | touchpad_init(struct touchpad_dispatch *touchpad, |
| 659 | struct evdev_device *device) |
| 660 | { |
| 661 | struct weston_motion_filter *accel; |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 662 | struct wl_event_loop *loop; |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 663 | |
| 664 | struct input_absinfo absinfo; |
| 665 | unsigned long abs_bits[NBITS(ABS_MAX)]; |
| 666 | |
| 667 | double width; |
| 668 | double height; |
| 669 | double diagonal; |
| 670 | |
| 671 | touchpad->base.interface = &touchpad_interface; |
| 672 | touchpad->device = device; |
| 673 | |
| 674 | /* Detect model */ |
| 675 | touchpad->model = get_touchpad_model(device); |
| 676 | |
| 677 | /* Configure pressure */ |
| 678 | ioctl(device->fd, EVIOCGBIT(EV_ABS, sizeof(abs_bits)), abs_bits); |
| 679 | if (TEST_BIT(abs_bits, ABS_PRESSURE)) { |
| 680 | ioctl(device->fd, EVIOCGABS(ABS_PRESSURE), &absinfo); |
| 681 | configure_touchpad_pressure(touchpad, |
| 682 | absinfo.minimum, |
| 683 | absinfo.maximum); |
| 684 | } |
| 685 | |
| 686 | /* Configure acceleration factor */ |
| 687 | width = abs(device->abs.max_x - device->abs.min_x); |
| 688 | height = abs(device->abs.max_y - device->abs.min_y); |
| 689 | diagonal = sqrt(width*width + height*height); |
| 690 | |
| 691 | touchpad->constant_accel_factor = |
| 692 | DEFAULT_CONSTANT_ACCEL_NUMERATOR / diagonal; |
| 693 | |
| 694 | touchpad->min_accel_factor = DEFAULT_MIN_ACCEL_FACTOR; |
| 695 | touchpad->max_accel_factor = DEFAULT_MAX_ACCEL_FACTOR; |
| 696 | |
| 697 | touchpad->hysteresis.margin_x = |
| 698 | diagonal / DEFAULT_HYSTERESIS_MARGIN_DENOMINATOR; |
| 699 | touchpad->hysteresis.margin_y = |
| 700 | diagonal / DEFAULT_HYSTERESIS_MARGIN_DENOMINATOR; |
| 701 | touchpad->hysteresis.center_x = 0; |
| 702 | touchpad->hysteresis.center_y = 0; |
| 703 | |
| 704 | /* Configure acceleration profile */ |
| 705 | accel = create_pointer_accelator_filter(touchpad_profile); |
| 706 | if (accel == NULL) |
| 707 | return -1; |
| 708 | touchpad->filter = accel; |
| 709 | |
| 710 | /* Setup initial state */ |
| 711 | touchpad->reset = 1; |
| 712 | |
| 713 | memset(touchpad->motion_history, 0, sizeof touchpad->motion_history); |
| 714 | touchpad->motion_index = 0; |
| 715 | touchpad->motion_count = 0; |
| 716 | |
| 717 | touchpad->state = TOUCHPAD_STATE_NONE; |
| 718 | touchpad->last_finger_state = 0; |
| 719 | touchpad->finger_state = 0; |
| 720 | |
Jonas Ådahl | 87b0735 | 2012-09-27 18:40:40 +0200 | [diff] [blame] | 721 | wl_array_init(&touchpad->fsm.events); |
| 722 | touchpad->fsm.state = FSM_IDLE; |
| 723 | |
| 724 | loop = wl_display_get_event_loop(device->seat->compositor->wl_display); |
| 725 | touchpad->fsm.timer_source = |
| 726 | wl_event_loop_add_timer(loop, fsm_timout_handler, touchpad); |
| 727 | if (touchpad->fsm.timer_source == NULL) { |
| 728 | accel->interface->destroy(accel); |
| 729 | return -1; |
| 730 | } |
| 731 | |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 732 | return 0; |
| 733 | } |
| 734 | |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 735 | struct evdev_dispatch * |
Pekka Paalanen | 3eb4761 | 2012-08-06 14:57:08 +0300 | [diff] [blame] | 736 | evdev_touchpad_create(struct evdev_device *device) |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 737 | { |
| 738 | struct touchpad_dispatch *touchpad; |
| 739 | |
| 740 | touchpad = malloc(sizeof *touchpad); |
| 741 | if (touchpad == NULL) |
| 742 | return NULL; |
| 743 | |
Jonas Ådahl | c689493 | 2012-09-27 18:40:39 +0200 | [diff] [blame] | 744 | if (touchpad_init(touchpad, device) != 0) { |
| 745 | free(touchpad); |
| 746 | return NULL; |
| 747 | } |
Jonas Ådahl | 1df17af | 2012-05-17 12:18:17 +0200 | [diff] [blame] | 748 | |
| 749 | return &touchpad->base; |
| 750 | } |