1 /*- 2 * Copyright (c) 2016 Vladimir Kondratyev <wulf@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 #include "opt_evdev.h" 29 30 #include <sys/param.h> 31 #include <sys/lock.h> 32 #include <sys/malloc.h> 33 #include <sys/systm.h> 34 35 #include <dev/misc/evdev/evdev.h> 36 #include <dev/misc/evdev/evdev_private.h> 37 #include <dev/misc/evdev/input.h> 38 39 #ifdef DEBUG 40 #define debugf(fmt, args...) kprintf("evdev: " fmt "\n", ##args) 41 #else 42 #define debugf(fmt, args...) 43 #endif 44 45 static uint16_t evdev_fngmap[] = { 46 BTN_TOOL_FINGER, 47 BTN_TOOL_DOUBLETAP, 48 BTN_TOOL_TRIPLETAP, 49 BTN_TOOL_QUADTAP, 50 BTN_TOOL_QUINTTAP, 51 }; 52 53 static uint16_t evdev_mtstmap[][2] = { 54 { ABS_MT_POSITION_X, ABS_X }, 55 { ABS_MT_POSITION_Y, ABS_Y }, 56 { ABS_MT_PRESSURE, ABS_PRESSURE }, 57 { ABS_MT_TOUCH_MAJOR, ABS_TOOL_WIDTH }, 58 }; 59 60 struct evdev_mt_slot { 61 uint64_t ev_report; 62 int32_t ev_mt_states[MT_CNT]; 63 }; 64 65 struct evdev_mt { 66 int32_t ev_mt_last_reported_slot; 67 struct evdev_mt_slot ev_mt_slots[]; 68 }; 69 70 void 71 evdev_mt_init(struct evdev_dev *evdev) 72 { 73 int32_t slot, slots; 74 75 slots = MAXIMAL_MT_SLOT(evdev) + 1; 76 77 evdev->ev_mt = kmalloc(offsetof(struct evdev_mt, ev_mt_slots) + 78 sizeof(struct evdev_mt_slot) * slots, M_EVDEV, M_WAITOK | M_ZERO); 79 80 /* Initialize multitouch protocol type B states */ 81 for (slot = 0; slot < slots; slot++) { 82 /* 83 * .ev_report should not be initialized to initial value of 84 * report counter (0) as it brokes free slot detection in 85 * evdev_get_mt_slot_by_tracking_id. So initialize it to -1 86 */ 87 evdev->ev_mt->ev_mt_slots[slot] = (struct evdev_mt_slot) { 88 .ev_report = 0xFFFFFFFFFFFFFFFFULL, 89 .ev_mt_states[ABS_MT_INDEX(ABS_MT_TRACKING_ID)] = -1, 90 }; 91 } 92 93 if (bit_test(evdev->ev_flags, EVDEV_FLAG_MT_STCOMPAT)) 94 evdev_support_mt_compat(evdev); 95 } 96 97 void 98 evdev_mt_free(struct evdev_dev *evdev) 99 { 100 101 kfree(evdev->ev_mt, M_EVDEV); 102 } 103 104 int32_t 105 evdev_get_last_mt_slot(struct evdev_dev *evdev) 106 { 107 108 return (evdev->ev_mt->ev_mt_last_reported_slot); 109 } 110 111 void 112 evdev_set_last_mt_slot(struct evdev_dev *evdev, int32_t slot) 113 { 114 115 evdev->ev_mt->ev_mt_slots[slot].ev_report = evdev->ev_report_count; 116 evdev->ev_mt->ev_mt_last_reported_slot = slot; 117 } 118 119 inline int32_t 120 evdev_get_mt_value(struct evdev_dev *evdev, int32_t slot, int16_t code) 121 { 122 123 return (evdev->ev_mt-> 124 ev_mt_slots[slot].ev_mt_states[ABS_MT_INDEX(code)]); 125 } 126 127 inline void 128 evdev_set_mt_value(struct evdev_dev *evdev, int32_t slot, int16_t code, 129 int32_t value) 130 { 131 132 evdev->ev_mt->ev_mt_slots[slot].ev_mt_states[ABS_MT_INDEX(code)] = 133 value; 134 } 135 136 int32_t 137 evdev_get_mt_slot_by_tracking_id(struct evdev_dev *evdev, int32_t tracking_id) 138 { 139 int32_t tr_id, slot, free_slot = -1; 140 141 for (slot = 0; slot <= MAXIMAL_MT_SLOT(evdev); slot++) { 142 tr_id = evdev_get_mt_value(evdev, slot, ABS_MT_TRACKING_ID); 143 if (tr_id == tracking_id) 144 return (slot); 145 /* 146 * Its possible that slot will be reassigned in a place of just 147 * released one within the same report. To avoid this compare 148 * report counter with slot`s report number updated with each 149 * ABS_MT_TRACKING_ID change. 150 */ 151 if (free_slot == -1 && tr_id == -1 && 152 evdev->ev_mt->ev_mt_slots[slot].ev_report != 153 evdev->ev_report_count) 154 free_slot = slot; 155 } 156 157 return (free_slot); 158 } 159 160 void 161 evdev_support_nfingers(struct evdev_dev *evdev, int32_t nfingers) 162 { 163 int32_t i; 164 165 for (i = 0; i < MIN(nitems(evdev_fngmap), nfingers); i++) 166 evdev_support_key(evdev, evdev_fngmap[i]); 167 } 168 169 void 170 evdev_support_mt_compat(struct evdev_dev *evdev) 171 { 172 int32_t i; 173 174 if (evdev->ev_absinfo == NULL) 175 return; 176 177 evdev_support_event(evdev, EV_KEY); 178 evdev_support_key(evdev, BTN_TOUCH); 179 180 /* Touchscreens should not advertise tap tool capabilities */ 181 if (!bit_test(evdev->ev_prop_flags, INPUT_PROP_DIRECT)) 182 evdev_support_nfingers(evdev, MAXIMAL_MT_SLOT(evdev) + 1); 183 184 /* Echo 0-th MT-slot as ST-slot */ 185 for (i = 0; i < nitems(evdev_mtstmap); i++) 186 if (bit_test(evdev->ev_abs_flags, evdev_mtstmap[i][0])) 187 evdev_support_abs(evdev, evdev_mtstmap[i][1], 188 evdev->ev_absinfo[evdev_mtstmap[i][0]].value, 189 evdev->ev_absinfo[evdev_mtstmap[i][0]].minimum, 190 evdev->ev_absinfo[evdev_mtstmap[i][0]].maximum, 191 evdev->ev_absinfo[evdev_mtstmap[i][0]].fuzz, 192 evdev->ev_absinfo[evdev_mtstmap[i][0]].flat, 193 evdev->ev_absinfo[evdev_mtstmap[i][0]].resolution); 194 } 195 196 static int32_t 197 evdev_count_fingers(struct evdev_dev *evdev) 198 { 199 int32_t nfingers = 0, i; 200 201 for (i = 0; i <= MAXIMAL_MT_SLOT(evdev); i++) 202 if (evdev_get_mt_value(evdev, i, ABS_MT_TRACKING_ID) != -1) 203 nfingers++; 204 205 return (nfingers); 206 } 207 208 static void 209 evdev_send_nfingers(struct evdev_dev *evdev, int32_t nfingers) 210 { 211 int32_t i; 212 213 EVDEV_LOCK_ASSERT(evdev); 214 215 if (nfingers > nitems(evdev_fngmap)) 216 nfingers = nitems(evdev_fngmap); 217 218 for (i = 0; i < nitems(evdev_fngmap); i++) 219 evdev_send_event(evdev, EV_KEY, evdev_fngmap[i], 220 nfingers == i + 1); 221 } 222 223 void 224 evdev_push_nfingers(struct evdev_dev *evdev, int32_t nfingers) 225 { 226 227 EVDEV_ENTER(evdev); 228 evdev_send_nfingers(evdev, nfingers); 229 EVDEV_EXIT(evdev); 230 } 231 232 void 233 evdev_send_mt_compat(struct evdev_dev *evdev) 234 { 235 int32_t nfingers, i; 236 237 EVDEV_LOCK_ASSERT(evdev); 238 239 nfingers = evdev_count_fingers(evdev); 240 evdev_send_event(evdev, EV_KEY, BTN_TOUCH, nfingers > 0); 241 242 if (evdev_get_mt_value(evdev, 0, ABS_MT_TRACKING_ID) != -1) 243 /* Echo 0-th MT-slot as ST-slot */ 244 for (i = 0; i < nitems(evdev_mtstmap); i++) 245 if (bit_test(evdev->ev_abs_flags, evdev_mtstmap[i][1])) 246 evdev_send_event(evdev, EV_ABS, 247 evdev_mtstmap[i][1], 248 evdev_get_mt_value(evdev, 0, 249 evdev_mtstmap[i][0])); 250 251 /* Touchscreens should not report tool taps */ 252 if (!bit_test(evdev->ev_prop_flags, INPUT_PROP_DIRECT)) 253 evdev_send_nfingers(evdev, nfingers); 254 255 if (nfingers == 0) 256 evdev_send_event(evdev, EV_ABS, ABS_PRESSURE, 0); 257 } 258 259 void 260 evdev_push_mt_compat(struct evdev_dev *evdev) 261 { 262 263 EVDEV_ENTER(evdev); 264 evdev_send_mt_compat(evdev); 265 EVDEV_EXIT(evdev); 266 } 267 268 void 269 evdev_send_mt_autorel(struct evdev_dev *evdev) 270 { 271 int32_t slot; 272 273 EVDEV_LOCK_ASSERT(evdev); 274 275 for (slot = 0; slot <= MAXIMAL_MT_SLOT(evdev); slot++) { 276 if (evdev->ev_mt->ev_mt_slots[slot].ev_report != 277 evdev->ev_report_count && 278 evdev_get_mt_value(evdev, slot, ABS_MT_TRACKING_ID) != -1){ 279 evdev_send_event(evdev, EV_ABS, ABS_MT_SLOT, slot); 280 evdev_send_event(evdev, EV_ABS, ABS_MT_TRACKING_ID, 281 -1); 282 } 283 } 284 } 285