blob: d6a6bd214ea3b1dbfc372a9943d6cb42c2089d11 [file] [log] [blame]
Michael Wrightd02c5b62014-02-10 15:10:22 -08001/*
2 * Copyright (C) 2005 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Mark Salyzyn5aa26b22014-06-10 13:07:44 -070017#include <assert.h>
18#include <dirent.h>
19#include <errno.h>
20#include <fcntl.h>
21#include <inttypes.h>
22#include <memory.h>
23#include <stdint.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string.h>
Siarhei Vishniakou7a522bf2019-09-24 12:46:29 +010027#include <sys/capability.h>
Mark Salyzyn5aa26b22014-06-10 13:07:44 -070028#include <sys/epoll.h>
Mark Salyzyn5aa26b22014-06-10 13:07:44 -070029#include <sys/inotify.h>
30#include <sys/ioctl.h>
Prabir Pradhanda7c00c2019-08-29 14:12:42 -070031#include <sys/limits.h>
Kim Low03ea0352020-11-06 12:45:07 -080032#include <sys/stat.h>
33#include <sys/sysmacros.h>
Mark Salyzyn5aa26b22014-06-10 13:07:44 -070034#include <unistd.h>
35
Michael Wrightd02c5b62014-02-10 15:10:22 -080036#define LOG_TAG "EventHub"
37
38// #define LOG_NDEBUG 0
Kim Low03ea0352020-11-06 12:45:07 -080039#include <android-base/file.h>
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -080040#include <android-base/stringprintf.h>
Chris Yed3fef462021-03-07 17:10:08 -080041#include <android-base/strings.h>
Philip Quinn39b81682019-01-09 22:20:39 -080042#include <cutils/properties.h>
Dominik Laskowski75788452021-02-09 18:51:25 -080043#include <ftl/enum.h>
Chris Ye8594e192020-07-14 10:34:06 -070044#include <input/KeyCharacterMap.h>
45#include <input/KeyLayoutMap.h>
46#include <input/VirtualKeyMap.h>
Dan Albert677d87e2014-06-16 17:31:28 -070047#include <openssl/sha.h>
Chris Yed3fef462021-03-07 17:10:08 -080048#include <statslog.h>
Prabir Pradhanda7c00c2019-08-29 14:12:42 -070049#include <utils/Errors.h>
Michael Wrightd02c5b62014-02-10 15:10:22 -080050#include <utils/Log.h>
51#include <utils/Timers.h>
Michael Wrightd02c5b62014-02-10 15:10:22 -080052
Chris Ye8594e192020-07-14 10:34:06 -070053#include <filesystem>
Chris Ye3fdbfef2021-01-06 18:45:18 -080054#include <regex>
Chris Ye8594e192020-07-14 10:34:06 -070055
56#include "EventHub.h"
Michael Wrightd02c5b62014-02-10 15:10:22 -080057
Michael Wrightd02c5b62014-02-10 15:10:22 -080058#define INDENT " "
59#define INDENT2 " "
60#define INDENT3 " "
61
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -080062using android::base::StringPrintf;
63
Michael Wrightd02c5b62014-02-10 15:10:22 -080064namespace android {
65
Dominik Laskowski2f01d772022-03-23 16:01:29 -070066using namespace ftl::flag_operators;
67
Usama Arifb27c8e62021-06-03 16:44:09 +010068static const char* DEVICE_INPUT_PATH = "/dev/input";
Siarhei Vishniakou951f3622018-12-12 19:45:42 -080069// v4l2 devices go directly into /dev
Usama Arifb27c8e62021-06-03 16:44:09 +010070static const char* DEVICE_PATH = "/dev";
Michael Wrightd02c5b62014-02-10 15:10:22 -080071
Chris Ye657c2f02021-05-25 16:24:37 -070072static constexpr size_t OBFUSCATED_LENGTH = 8;
73
Chris Ye87143712020-11-10 05:05:58 +000074static constexpr int32_t FF_STRONG_MAGNITUDE_CHANNEL_IDX = 0;
75static constexpr int32_t FF_WEAK_MAGNITUDE_CHANNEL_IDX = 1;
Chris Ye6393a262020-08-04 19:41:36 -070076
Chris Yee2b1e5c2021-03-10 22:45:12 -080077// Mapping for input battery class node IDs lookup.
78// https://www.kernel.org/doc/Documentation/power/power_supply_class.txt
79static const std::unordered_map<std::string, InputBatteryClass> BATTERY_CLASSES =
80 {{"capacity", InputBatteryClass::CAPACITY},
81 {"capacity_level", InputBatteryClass::CAPACITY_LEVEL},
82 {"status", InputBatteryClass::STATUS}};
83
84// Mapping for input battery class node names lookup.
85// https://www.kernel.org/doc/Documentation/power/power_supply_class.txt
86static const std::unordered_map<InputBatteryClass, std::string> BATTERY_NODES =
87 {{InputBatteryClass::CAPACITY, "capacity"},
88 {InputBatteryClass::CAPACITY_LEVEL, "capacity_level"},
89 {InputBatteryClass::STATUS, "status"}};
90
Kim Low03ea0352020-11-06 12:45:07 -080091// must be kept in sync with definitions in kernel /drivers/power/supply/power_supply_sysfs.c
92static const std::unordered_map<std::string, int32_t> BATTERY_STATUS =
93 {{"Unknown", BATTERY_STATUS_UNKNOWN},
94 {"Charging", BATTERY_STATUS_CHARGING},
95 {"Discharging", BATTERY_STATUS_DISCHARGING},
96 {"Not charging", BATTERY_STATUS_NOT_CHARGING},
97 {"Full", BATTERY_STATUS_FULL}};
98
99// Mapping taken from
100// https://gitlab.freedesktop.org/upower/upower/-/blob/master/src/linux/up-device-supply.c#L484
101static const std::unordered_map<std::string, int32_t> BATTERY_LEVEL = {{"Critical", 5},
102 {"Low", 10},
103 {"Normal", 55},
104 {"High", 70},
105 {"Full", 100},
106 {"Unknown", 50}};
107
Chris Ye3fdbfef2021-01-06 18:45:18 -0800108// Mapping for input led class node names lookup.
109// https://www.kernel.org/doc/html/latest/leds/leds-class.html
110static const std::unordered_map<std::string, InputLightClass> LIGHT_CLASSES =
111 {{"red", InputLightClass::RED},
112 {"green", InputLightClass::GREEN},
113 {"blue", InputLightClass::BLUE},
114 {"global", InputLightClass::GLOBAL},
115 {"brightness", InputLightClass::BRIGHTNESS},
116 {"multi_index", InputLightClass::MULTI_INDEX},
117 {"multi_intensity", InputLightClass::MULTI_INTENSITY},
118 {"max_brightness", InputLightClass::MAX_BRIGHTNESS}};
119
120// Mapping for input multicolor led class node names.
121// https://www.kernel.org/doc/html/latest/leds/leds-class-multicolor.html
122static const std::unordered_map<InputLightClass, std::string> LIGHT_NODES =
123 {{InputLightClass::BRIGHTNESS, "brightness"},
124 {InputLightClass::MULTI_INDEX, "multi_index"},
125 {InputLightClass::MULTI_INTENSITY, "multi_intensity"}};
126
127// Mapping for light color name and the light color
128const std::unordered_map<std::string, LightColor> LIGHT_COLORS = {{"red", LightColor::RED},
129 {"green", LightColor::GREEN},
130 {"blue", LightColor::BLUE}};
131
Michael Wrightd02c5b62014-02-10 15:10:22 -0800132static inline const char* toString(bool value) {
133 return value ? "true" : "false";
134}
135
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100136static std::string sha1(const std::string& in) {
Dan Albert677d87e2014-06-16 17:31:28 -0700137 SHA_CTX ctx;
138 SHA1_Init(&ctx);
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100139 SHA1_Update(&ctx, reinterpret_cast<const u_char*>(in.c_str()), in.size());
Dan Albert677d87e2014-06-16 17:31:28 -0700140 u_char digest[SHA_DIGEST_LENGTH];
141 SHA1_Final(digest, &ctx);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800142
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100143 std::string out;
Dan Albert677d87e2014-06-16 17:31:28 -0700144 for (size_t i = 0; i < SHA_DIGEST_LENGTH; i++) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100145 out += StringPrintf("%02x", digest[i]);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800146 }
147 return out;
148}
149
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800150/**
151 * Return true if name matches "v4l-touch*"
152 */
Chris Ye8594e192020-07-14 10:34:06 -0700153static bool isV4lTouchNode(std::string name) {
154 return name.find("v4l-touch") != std::string::npos;
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800155}
156
Philip Quinn39b81682019-01-09 22:20:39 -0800157/**
158 * Returns true if V4L devices should be scanned.
159 *
160 * The system property ro.input.video_enabled can be used to control whether
161 * EventHub scans and opens V4L devices. As V4L does not support multiple
162 * clients, EventHub effectively blocks access to these devices when it opens
Siarhei Vishniakou29f88492019-04-05 14:11:43 -0700163 * them.
164 *
165 * Setting this to "false" would prevent any video devices from being discovered and
166 * associated with input devices.
167 *
168 * This property can be used as follows:
169 * 1. To turn off features that are dependent on video device presence.
170 * 2. During testing and development, to allow other clients to read video devices
171 * directly from /dev.
Philip Quinn39b81682019-01-09 22:20:39 -0800172 */
173static bool isV4lScanningEnabled() {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700174 return property_get_bool("ro.input.video_enabled", true /* default_value */);
Philip Quinn39b81682019-01-09 22:20:39 -0800175}
176
Siarhei Vishniakou592bac22018-11-08 19:42:38 -0800177static nsecs_t processEventTimestamp(const struct input_event& event) {
178 // Use the time specified in the event instead of the current time
179 // so that downstream code can get more accurate estimates of
180 // event dispatch latency from the time the event is enqueued onto
181 // the evdev client buffer.
182 //
183 // The event's timestamp fortuitously uses the same monotonic clock
184 // time base as the rest of Android. The kernel event device driver
185 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts().
186 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere
187 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a
188 // system call that also queries ktime_get_ts().
189
190 const nsecs_t inputEventTime = seconds_to_nanoseconds(event.time.tv_sec) +
191 microseconds_to_nanoseconds(event.time.tv_usec);
192 return inputEventTime;
193}
194
Kim Low03ea0352020-11-06 12:45:07 -0800195/**
196 * Returns the sysfs root path of the input device
197 *
198 */
Chris Ye3fdbfef2021-01-06 18:45:18 -0800199static std::optional<std::filesystem::path> getSysfsRootPath(const char* devicePath) {
Kim Low03ea0352020-11-06 12:45:07 -0800200 std::error_code errorCode;
201
202 // Stat the device path to get the major and minor number of the character file
203 struct stat statbuf;
204 if (stat(devicePath, &statbuf) == -1) {
205 ALOGE("Could not stat device %s due to error: %s.", devicePath, std::strerror(errno));
Chris Ye3fdbfef2021-01-06 18:45:18 -0800206 return std::nullopt;
Kim Low03ea0352020-11-06 12:45:07 -0800207 }
208
209 unsigned int major_num = major(statbuf.st_rdev);
210 unsigned int minor_num = minor(statbuf.st_rdev);
211
212 // Realpath "/sys/dev/char/{major}:{minor}" to get the sysfs path to the input event
213 auto sysfsPath = std::filesystem::path("/sys/dev/char/");
214 sysfsPath /= std::to_string(major_num) + ":" + std::to_string(minor_num);
215 sysfsPath = std::filesystem::canonical(sysfsPath, errorCode);
216
217 // Make sure nothing went wrong in call to canonical()
218 if (errorCode) {
219 ALOGW("Could not run filesystem::canonical() due to error %d : %s.", errorCode.value(),
220 errorCode.message().c_str());
Chris Ye3fdbfef2021-01-06 18:45:18 -0800221 return std::nullopt;
Kim Low03ea0352020-11-06 12:45:07 -0800222 }
223
224 // Continue to go up a directory until we reach a directory named "input"
225 while (sysfsPath != "/" && sysfsPath.filename() != "input") {
226 sysfsPath = sysfsPath.parent_path();
227 }
228
229 // Then go up one more and you will be at the sysfs root of the device
230 sysfsPath = sysfsPath.parent_path();
231
232 // Make sure we didn't reach root path and that directory actually exists
233 if (sysfsPath == "/" || !std::filesystem::exists(sysfsPath, errorCode)) {
234 if (errorCode) {
235 ALOGW("Could not run filesystem::exists() due to error %d : %s.", errorCode.value(),
236 errorCode.message().c_str());
237 }
238
239 // Not found
Chris Ye3fdbfef2021-01-06 18:45:18 -0800240 return std::nullopt;
Kim Low03ea0352020-11-06 12:45:07 -0800241 }
242
243 return sysfsPath;
244}
245
246/**
Chris Ye3fdbfef2021-01-06 18:45:18 -0800247 * Returns the list of files under a specified path.
Kim Low03ea0352020-11-06 12:45:07 -0800248 */
Chris Ye3fdbfef2021-01-06 18:45:18 -0800249static std::vector<std::filesystem::path> allFilesInPath(const std::filesystem::path& path) {
250 std::vector<std::filesystem::path> nodes;
251 std::error_code errorCode;
252 auto iter = std::filesystem::directory_iterator(path, errorCode);
253 while (!errorCode && iter != std::filesystem::directory_iterator()) {
254 nodes.push_back(iter->path());
255 iter++;
256 }
257 return nodes;
258}
259
260/**
261 * Returns the list of files under a specified directory in a sysfs path.
262 * Example:
263 * findSysfsNodes(sysfsRootPath, SysfsClass::LEDS) will return all led nodes under "leds" directory
264 * in the sysfs path.
265 */
266static std::vector<std::filesystem::path> findSysfsNodes(const std::filesystem::path& sysfsRoot,
267 SysfsClass clazz) {
Dominik Laskowski75788452021-02-09 18:51:25 -0800268 std::string nodeStr = ftl::enum_string(clazz);
Chris Ye3fdbfef2021-01-06 18:45:18 -0800269 std::for_each(nodeStr.begin(), nodeStr.end(),
270 [](char& c) { c = std::tolower(static_cast<unsigned char>(c)); });
271 std::vector<std::filesystem::path> nodes;
272 for (auto path = sysfsRoot; path != "/" && nodes.empty(); path = path.parent_path()) {
273 nodes = allFilesInPath(path / nodeStr);
274 }
275 return nodes;
276}
277
278static std::optional<std::array<LightColor, COLOR_NUM>> getColorIndexArray(
279 std::filesystem::path path) {
280 std::string indexStr;
281 if (!base::ReadFileToString(path, &indexStr)) {
282 return std::nullopt;
283 }
284
285 // Parse the multi color LED index file, refer to kernel docs
286 // leds/leds-class-multicolor.html
287 std::regex indexPattern("(red|green|blue)\\s(red|green|blue)\\s(red|green|blue)[\\n]");
288 std::smatch results;
289 std::array<LightColor, COLOR_NUM> colors;
290 if (!std::regex_match(indexStr, results, indexPattern)) {
291 return std::nullopt;
292 }
293
294 for (size_t i = 1; i < results.size(); i++) {
295 const auto it = LIGHT_COLORS.find(results[i].str());
296 if (it != LIGHT_COLORS.end()) {
297 // intensities.emplace(it->second, 0);
298 colors[i - 1] = it->second;
Kim Low03ea0352020-11-06 12:45:07 -0800299 }
300 }
Chris Ye3fdbfef2021-01-06 18:45:18 -0800301 return colors;
Kim Low03ea0352020-11-06 12:45:07 -0800302}
303
Michael Wrightd02c5b62014-02-10 15:10:22 -0800304// --- Global Functions ---
305
Dominik Laskowski2f01d772022-03-23 16:01:29 -0700306ftl::Flags<InputDeviceClass> getAbsAxisUsage(int32_t axis,
307 ftl::Flags<InputDeviceClass> deviceClasses) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800308 // Touch devices get dibs on touch-related axes.
Chris Ye1b0c7342020-07-28 21:57:03 -0700309 if (deviceClasses.test(InputDeviceClass::TOUCH)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800310 switch (axis) {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700311 case ABS_X:
312 case ABS_Y:
313 case ABS_PRESSURE:
314 case ABS_TOOL_WIDTH:
315 case ABS_DISTANCE:
316 case ABS_TILT_X:
317 case ABS_TILT_Y:
318 case ABS_MT_SLOT:
319 case ABS_MT_TOUCH_MAJOR:
320 case ABS_MT_TOUCH_MINOR:
321 case ABS_MT_WIDTH_MAJOR:
322 case ABS_MT_WIDTH_MINOR:
323 case ABS_MT_ORIENTATION:
324 case ABS_MT_POSITION_X:
325 case ABS_MT_POSITION_Y:
326 case ABS_MT_TOOL_TYPE:
327 case ABS_MT_BLOB_ID:
328 case ABS_MT_TRACKING_ID:
329 case ABS_MT_PRESSURE:
330 case ABS_MT_DISTANCE:
Chris Ye1b0c7342020-07-28 21:57:03 -0700331 return InputDeviceClass::TOUCH;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800332 }
333 }
334
Chris Yef59a2f42020-10-16 12:55:26 -0700335 if (deviceClasses.test(InputDeviceClass::SENSOR)) {
336 switch (axis) {
337 case ABS_X:
338 case ABS_Y:
339 case ABS_Z:
340 case ABS_RX:
341 case ABS_RY:
342 case ABS_RZ:
343 return InputDeviceClass::SENSOR;
344 }
345 }
346
Michael Wright842500e2015-03-13 17:32:02 -0700347 // External stylus gets the pressure axis
Chris Ye1b0c7342020-07-28 21:57:03 -0700348 if (deviceClasses.test(InputDeviceClass::EXTERNAL_STYLUS)) {
Michael Wright842500e2015-03-13 17:32:02 -0700349 if (axis == ABS_PRESSURE) {
Chris Ye1b0c7342020-07-28 21:57:03 -0700350 return InputDeviceClass::EXTERNAL_STYLUS;
Michael Wright842500e2015-03-13 17:32:02 -0700351 }
352 }
353
Michael Wrightd02c5b62014-02-10 15:10:22 -0800354 // Joystick devices get the rest.
Chris Ye1b0c7342020-07-28 21:57:03 -0700355 return deviceClasses & InputDeviceClass::JOYSTICK;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800356}
357
358// --- EventHub::Device ---
359
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100360EventHub::Device::Device(int fd, int32_t id, const std::string& path,
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700361 const InputDeviceIdentifier& identifier)
Chris Ye989bb932020-07-04 16:18:59 -0700362 : fd(fd),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700363 id(id),
364 path(path),
365 identifier(identifier),
366 classes(0),
367 configuration(nullptr),
368 virtualKeyMap(nullptr),
369 ffEffectPlaying(false),
370 ffEffectId(-1),
Chris Ye1dd2e5c2021-04-04 23:12:41 -0700371 associatedDevice(nullptr),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700372 controllerNumber(0),
373 enabled(true),
Chris Ye66fbac32020-07-06 20:36:43 -0700374 isVirtual(fd < 0) {}
Michael Wrightd02c5b62014-02-10 15:10:22 -0800375
376EventHub::Device::~Device() {
377 close();
Michael Wrightd02c5b62014-02-10 15:10:22 -0800378}
379
380void EventHub::Device::close() {
381 if (fd >= 0) {
382 ::close(fd);
383 fd = -1;
384 }
385}
386
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -0700387status_t EventHub::Device::enable() {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100388 fd = open(path.c_str(), O_RDWR | O_CLOEXEC | O_NONBLOCK);
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700389 if (fd < 0) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100390 ALOGE("could not open %s, %s\n", path.c_str(), strerror(errno));
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -0700391 return -errno;
392 }
393 enabled = true;
394 return OK;
395}
396
397status_t EventHub::Device::disable() {
398 close();
399 enabled = false;
400 return OK;
401}
402
Chris Ye989bb932020-07-04 16:18:59 -0700403bool EventHub::Device::hasValidFd() const {
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -0700404 return !isVirtual && enabled;
405}
Michael Wrightd02c5b62014-02-10 15:10:22 -0800406
Chris Ye3a1e4462020-08-12 10:13:15 -0700407const std::shared_ptr<KeyCharacterMap> EventHub::Device::getKeyCharacterMap() const {
Chris Ye989bb932020-07-04 16:18:59 -0700408 return keyMap.keyCharacterMap;
409}
410
411template <std::size_t N>
412status_t EventHub::Device::readDeviceBitMask(unsigned long ioctlCode, BitArray<N>& bitArray) {
413 if (!hasValidFd()) {
414 return BAD_VALUE;
415 }
416 if ((_IOC_SIZE(ioctlCode) == 0)) {
417 ioctlCode |= _IOC(0, 0, 0, bitArray.bytes());
418 }
419
420 typename BitArray<N>::Buffer buffer;
421 status_t ret = ioctl(fd, ioctlCode, buffer.data());
422 bitArray.loadFromBuffer(buffer);
423 return ret;
424}
425
426void EventHub::Device::configureFd() {
427 // Set fd parameters with ioctl, such as key repeat, suspend block, and clock type
428 if (classes.test(InputDeviceClass::KEYBOARD)) {
429 // Disable kernel key repeat since we handle it ourselves
430 unsigned int repeatRate[] = {0, 0};
431 if (ioctl(fd, EVIOCSREP, repeatRate)) {
432 ALOGW("Unable to disable kernel key repeat for %s: %s", path.c_str(), strerror(errno));
433 }
434 }
435
436 // Tell the kernel that we want to use the monotonic clock for reporting timestamps
437 // associated with input events. This is important because the input system
438 // uses the timestamps extensively and assumes they were recorded using the monotonic
439 // clock.
440 int clockId = CLOCK_MONOTONIC;
Chris Yef59a2f42020-10-16 12:55:26 -0700441 if (classes.test(InputDeviceClass::SENSOR)) {
442 // Each new sensor event should use the same time base as
443 // SystemClock.elapsedRealtimeNanos().
444 clockId = CLOCK_BOOTTIME;
445 }
Chris Ye989bb932020-07-04 16:18:59 -0700446 bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId);
447 ALOGI("usingClockIoctl=%s", toString(usingClockIoctl));
448}
449
450bool EventHub::Device::hasKeycodeLocked(int keycode) const {
451 if (!keyMap.haveKeyLayout()) {
452 return false;
453 }
454
455 std::vector<int32_t> scanCodes;
456 keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes);
457 const size_t N = scanCodes.size();
458 for (size_t i = 0; i < N && i <= KEY_MAX; i++) {
459 int32_t sc = scanCodes[i];
460 if (sc >= 0 && sc <= KEY_MAX && keyBitmask.test(sc)) {
461 return true;
462 }
463 }
464
465 return false;
466}
467
468void EventHub::Device::loadConfigurationLocked() {
469 configurationFile =
470 getInputDeviceConfigurationFilePathByDeviceIdentifier(identifier,
471 InputDeviceConfigurationFileType::
472 CONFIGURATION);
473 if (configurationFile.empty()) {
474 ALOGD("No input device configuration file found for device '%s'.", identifier.name.c_str());
475 } else {
Siarhei Vishniakou4d9f9772020-09-02 22:28:29 -0500476 android::base::Result<std::unique_ptr<PropertyMap>> propertyMap =
477 PropertyMap::load(configurationFile.c_str());
478 if (!propertyMap.ok()) {
Chris Ye989bb932020-07-04 16:18:59 -0700479 ALOGE("Error loading input device configuration file for device '%s'. "
480 "Using default configuration.",
481 identifier.name.c_str());
Siarhei Vishniakoud549b252020-08-11 11:25:26 -0500482 } else {
Siarhei Vishniakou4d9f9772020-09-02 22:28:29 -0500483 configuration = std::move(*propertyMap);
Chris Ye989bb932020-07-04 16:18:59 -0700484 }
485 }
486}
487
488bool EventHub::Device::loadVirtualKeyMapLocked() {
489 // The virtual key map is supplied by the kernel as a system board property file.
490 std::string propPath = "/sys/board_properties/virtualkeys.";
491 propPath += identifier.getCanonicalName();
492 if (access(propPath.c_str(), R_OK)) {
493 return false;
494 }
495 virtualKeyMap = VirtualKeyMap::load(propPath);
496 return virtualKeyMap != nullptr;
497}
498
499status_t EventHub::Device::loadKeyMapLocked() {
Siarhei Vishniakoud549b252020-08-11 11:25:26 -0500500 return keyMap.load(identifier, configuration.get());
Chris Ye989bb932020-07-04 16:18:59 -0700501}
502
503bool EventHub::Device::isExternalDeviceLocked() {
504 if (configuration) {
505 bool value;
506 if (configuration->tryGetProperty(String8("device.internal"), value)) {
507 return !value;
508 }
509 }
510 return identifier.bus == BUS_USB || identifier.bus == BUS_BLUETOOTH;
511}
512
513bool EventHub::Device::deviceHasMicLocked() {
514 if (configuration) {
515 bool value;
516 if (configuration->tryGetProperty(String8("audio.mic"), value)) {
517 return value;
518 }
519 }
520 return false;
521}
522
523void EventHub::Device::setLedStateLocked(int32_t led, bool on) {
524 int32_t sc;
525 if (hasValidFd() && mapLed(led, &sc) != NAME_NOT_FOUND) {
526 struct input_event ev;
527 ev.time.tv_sec = 0;
528 ev.time.tv_usec = 0;
529 ev.type = EV_LED;
530 ev.code = sc;
531 ev.value = on ? 1 : 0;
532
533 ssize_t nWrite;
534 do {
535 nWrite = write(fd, &ev, sizeof(struct input_event));
536 } while (nWrite == -1 && errno == EINTR);
537 }
538}
539
540void EventHub::Device::setLedForControllerLocked() {
541 for (int i = 0; i < MAX_CONTROLLER_LEDS; i++) {
542 setLedStateLocked(ALED_CONTROLLER_1 + i, controllerNumber == i + 1);
543 }
544}
545
546status_t EventHub::Device::mapLed(int32_t led, int32_t* outScanCode) const {
547 if (!keyMap.haveKeyLayout()) {
548 return NAME_NOT_FOUND;
549 }
550
551 int32_t scanCode;
552 if (keyMap.keyLayoutMap->findScanCodeForLed(led, &scanCode) != NAME_NOT_FOUND) {
553 if (scanCode >= 0 && scanCode <= LED_MAX && ledBitmask.test(scanCode)) {
554 *outScanCode = scanCode;
555 return NO_ERROR;
556 }
557 }
558 return NAME_NOT_FOUND;
559}
560
Chris Ye3fdbfef2021-01-06 18:45:18 -0800561// Check the sysfs path for any input device batteries, returns true if battery found.
Chris Ye1dd2e5c2021-04-04 23:12:41 -0700562bool EventHub::AssociatedDevice::configureBatteryLocked() {
Chris Yee2b1e5c2021-03-10 22:45:12 -0800563 nextBatteryId = 0;
564 // Check if device has any battery.
565 const auto& paths = findSysfsNodes(sysfsRootPath, SysfsClass::POWER_SUPPLY);
566 for (const auto& nodePath : paths) {
567 RawBatteryInfo info;
568 info.id = ++nextBatteryId;
569 info.path = nodePath;
570 info.name = nodePath.filename();
571
572 // Scan the path for all the files
573 // Refer to https://www.kernel.org/doc/Documentation/leds/leds-class.txt
574 const auto& files = allFilesInPath(nodePath);
575 for (const auto& file : files) {
576 const auto it = BATTERY_CLASSES.find(file.filename().string());
577 if (it != BATTERY_CLASSES.end()) {
578 info.flags |= it->second;
579 }
580 }
581 batteryInfos.insert_or_assign(info.id, info);
582 ALOGD("configureBatteryLocked rawBatteryId %d name %s", info.id, info.name.c_str());
Chris Ye3fdbfef2021-01-06 18:45:18 -0800583 }
Chris Yee2b1e5c2021-03-10 22:45:12 -0800584 return !batteryInfos.empty();
Chris Ye3fdbfef2021-01-06 18:45:18 -0800585}
586
587// Check the sysfs path for any input device lights, returns true if lights found.
Chris Ye1dd2e5c2021-04-04 23:12:41 -0700588bool EventHub::AssociatedDevice::configureLightsLocked() {
Chris Yee2b1e5c2021-03-10 22:45:12 -0800589 nextLightId = 0;
Chris Ye3fdbfef2021-01-06 18:45:18 -0800590 // Check if device has any lights.
Chris Yee2b1e5c2021-03-10 22:45:12 -0800591 const auto& paths = findSysfsNodes(sysfsRootPath, SysfsClass::LEDS);
Chris Ye3fdbfef2021-01-06 18:45:18 -0800592 for (const auto& nodePath : paths) {
593 RawLightInfo info;
594 info.id = ++nextLightId;
595 info.path = nodePath;
596 info.name = nodePath.filename();
597 info.maxBrightness = std::nullopt;
598 size_t nameStart = info.name.rfind(":");
599 if (nameStart != std::string::npos) {
600 // Trim the name to color name
601 info.name = info.name.substr(nameStart + 1);
602 // Set InputLightClass flag for colors
603 const auto it = LIGHT_CLASSES.find(info.name);
604 if (it != LIGHT_CLASSES.end()) {
605 info.flags |= it->second;
606 }
607 }
608 // Scan the path for all the files
609 // Refer to https://www.kernel.org/doc/Documentation/leds/leds-class.txt
610 const auto& files = allFilesInPath(nodePath);
611 for (const auto& file : files) {
612 const auto it = LIGHT_CLASSES.find(file.filename().string());
613 if (it != LIGHT_CLASSES.end()) {
614 info.flags |= it->second;
615 // If the node has maximum brightness, read it
616 if (it->second == InputLightClass::MAX_BRIGHTNESS) {
617 std::string str;
618 if (base::ReadFileToString(file, &str)) {
619 info.maxBrightness = std::stoi(str);
620 }
621 }
622 }
623 }
624 lightInfos.insert_or_assign(info.id, info);
Chris Yee2b1e5c2021-03-10 22:45:12 -0800625 ALOGD("configureLightsLocked rawLightId %d name %s", info.id, info.name.c_str());
Chris Ye3fdbfef2021-01-06 18:45:18 -0800626 }
627 return !lightInfos.empty();
628}
629
Siarhei Vishniakou7a522bf2019-09-24 12:46:29 +0100630/**
631 * Get the capabilities for the current process.
632 * Crashes the system if unable to create / check / destroy the capabilities object.
633 */
634class Capabilities final {
635public:
636 explicit Capabilities() {
637 mCaps = cap_get_proc();
638 LOG_ALWAYS_FATAL_IF(mCaps == nullptr, "Could not get capabilities of the current process");
639 }
640
641 /**
642 * Check whether the current process has a specific capability
643 * in the set of effective capabilities.
644 * Return CAP_SET if the process has the requested capability
645 * Return CAP_CLEAR otherwise.
646 */
647 cap_flag_value_t checkEffectiveCapability(cap_value_t capability) {
648 cap_flag_value_t value;
649 const int result = cap_get_flag(mCaps, capability, CAP_EFFECTIVE, &value);
650 LOG_ALWAYS_FATAL_IF(result == -1, "Could not obtain the requested capability");
651 return value;
652 }
653
654 ~Capabilities() {
655 const int result = cap_free(mCaps);
656 LOG_ALWAYS_FATAL_IF(result == -1, "Could not release the capabilities structure");
657 }
658
659private:
660 cap_t mCaps;
661};
662
663static void ensureProcessCanBlockSuspend() {
664 Capabilities capabilities;
665 const bool canBlockSuspend =
666 capabilities.checkEffectiveCapability(CAP_BLOCK_SUSPEND) == CAP_SET;
667 LOG_ALWAYS_FATAL_IF(!canBlockSuspend,
668 "Input must be able to block suspend to properly process events");
669}
670
Michael Wrightd02c5b62014-02-10 15:10:22 -0800671// --- EventHub ---
672
Michael Wrightd02c5b62014-02-10 15:10:22 -0800673const int EventHub::EPOLL_MAX_EVENTS;
674
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700675EventHub::EventHub(void)
676 : mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD),
677 mNextDeviceId(1),
678 mControllerNumbers(),
Michael Wrightd02c5b62014-02-10 15:10:22 -0800679 mNeedToSendFinishedDeviceScan(false),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700680 mNeedToReopenDevices(false),
681 mNeedToScanDevices(true),
682 mPendingEventCount(0),
683 mPendingEventIndex(0),
684 mPendingINotify(false) {
Siarhei Vishniakou7a522bf2019-09-24 12:46:29 +0100685 ensureProcessCanBlockSuspend();
Michael Wrightd02c5b62014-02-10 15:10:22 -0800686
Nick Kralevichfcf1b2b2018-12-15 11:59:30 -0800687 mEpollFd = epoll_create1(EPOLL_CLOEXEC);
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800688 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance: %s", strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -0800689
Michael Wright8e9a8562022-02-09 13:44:29 +0000690 mINotifyFd = inotify_init1(IN_CLOEXEC);
Usama Arifb27c8e62021-06-03 16:44:09 +0100691
692 std::error_code errorCode;
693 bool isDeviceInotifyAdded = false;
694 if (std::filesystem::exists(DEVICE_INPUT_PATH, errorCode)) {
695 addDeviceInputInotify();
Philip Quinn39b81682019-01-09 22:20:39 -0800696 } else {
Usama Arifb27c8e62021-06-03 16:44:09 +0100697 addDeviceInotify();
698 isDeviceInotifyAdded = true;
699 if (errorCode) {
700 ALOGW("Could not run filesystem::exists() due to error %d : %s.", errorCode.value(),
701 errorCode.message().c_str());
702 }
703 }
704
705 if (isV4lScanningEnabled() && !isDeviceInotifyAdded) {
706 addDeviceInotify();
707 } else {
Philip Quinn39b81682019-01-09 22:20:39 -0800708 ALOGI("Video device scanning disabled");
709 }
Michael Wrightd02c5b62014-02-10 15:10:22 -0800710
Siarhei Vishniakou2d0e9482019-09-24 12:52:47 +0100711 struct epoll_event eventItem = {};
712 eventItem.events = EPOLLIN | EPOLLWAKEUP;
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -0700713 eventItem.data.fd = mINotifyFd;
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800714 int result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800715 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno);
716
717 int wakeFds[2];
Michael Wright8e9a8562022-02-09 13:44:29 +0000718 result = pipe2(wakeFds, O_CLOEXEC);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800719 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno);
720
721 mWakeReadPipeFd = wakeFds[0];
722 mWakeWritePipeFd = wakeFds[1];
723
724 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK);
725 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700726 errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800727
728 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK);
729 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700730 errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800731
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -0700732 eventItem.data.fd = mWakeReadPipeFd;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800733 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem);
734 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700735 errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800736}
737
738EventHub::~EventHub(void) {
739 closeAllDevicesLocked();
740
Michael Wrightd02c5b62014-02-10 15:10:22 -0800741 ::close(mEpollFd);
742 ::close(mINotifyFd);
743 ::close(mWakeReadPipeFd);
744 ::close(mWakeWritePipeFd);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800745}
746
Usama Arifb27c8e62021-06-03 16:44:09 +0100747/**
748 * On devices that don't have any input devices (like some development boards), the /dev/input
749 * directory will be absent. However, the user may still plug in an input device at a later time.
750 * Add watch for contents of /dev/input only when /dev/input appears.
751 */
752void EventHub::addDeviceInputInotify() {
753 mDeviceInputWd = inotify_add_watch(mINotifyFd, DEVICE_INPUT_PATH, IN_DELETE | IN_CREATE);
754 LOG_ALWAYS_FATAL_IF(mDeviceInputWd < 0, "Could not register INotify for %s: %s",
755 DEVICE_INPUT_PATH, strerror(errno));
756}
757
758void EventHub::addDeviceInotify() {
759 mDeviceWd = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE);
760 LOG_ALWAYS_FATAL_IF(mDeviceWd < 0, "Could not register INotify for %s: %s", DEVICE_PATH,
761 strerror(errno));
762}
763
Michael Wrightd02c5b62014-02-10 15:10:22 -0800764InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const {
Chris Ye87143712020-11-10 05:05:58 +0000765 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800766 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -0700767 return device != nullptr ? device->identifier : InputDeviceIdentifier();
Michael Wrightd02c5b62014-02-10 15:10:22 -0800768}
769
Dominik Laskowski2f01d772022-03-23 16:01:29 -0700770ftl::Flags<InputDeviceClass> EventHub::getDeviceClasses(int32_t deviceId) const {
Chris Ye87143712020-11-10 05:05:58 +0000771 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800772 Device* device = getDeviceLocked(deviceId);
Dominik Laskowski2f01d772022-03-23 16:01:29 -0700773 return device != nullptr ? device->classes : ftl::Flags<InputDeviceClass>(0);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800774}
775
776int32_t EventHub::getDeviceControllerNumber(int32_t deviceId) const {
Chris Ye87143712020-11-10 05:05:58 +0000777 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800778 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -0700779 return device != nullptr ? device->controllerNumber : 0;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800780}
781
782void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const {
Chris Ye87143712020-11-10 05:05:58 +0000783 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800784 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -0700785 if (device != nullptr && device->configuration) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800786 *outConfiguration = *device->configuration;
787 } else {
788 outConfiguration->clear();
789 }
790}
791
792status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis,
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700793 RawAbsoluteAxisInfo* outAxisInfo) const {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800794 outAxisInfo->clear();
795
796 if (axis >= 0 && axis <= ABS_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000797 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800798
799 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700800 if (device != nullptr && device->hasValidFd() && device->absBitmask.test(axis)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800801 struct input_absinfo info;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700802 if (ioctl(device->fd, EVIOCGABS(axis), &info)) {
803 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", axis,
804 device->identifier.name.c_str(), device->fd, errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800805 return -errno;
806 }
807
808 if (info.minimum != info.maximum) {
809 outAxisInfo->valid = true;
810 outAxisInfo->minValue = info.minimum;
811 outAxisInfo->maxValue = info.maximum;
812 outAxisInfo->flat = info.flat;
813 outAxisInfo->fuzz = info.fuzz;
814 outAxisInfo->resolution = info.resolution;
815 }
816 return OK;
817 }
818 }
819 return -1;
820}
821
822bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const {
823 if (axis >= 0 && axis <= REL_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000824 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800825 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700826 return device != nullptr ? device->relBitmask.test(axis) : false;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800827 }
828 return false;
829}
830
831bool EventHub::hasInputProperty(int32_t deviceId, int property) const {
Chris Ye87143712020-11-10 05:05:58 +0000832 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800833
Chris Ye989bb932020-07-04 16:18:59 -0700834 Device* device = getDeviceLocked(deviceId);
835 return property >= 0 && property <= INPUT_PROP_MAX && device != nullptr
836 ? device->propBitmask.test(property)
837 : false;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800838}
839
Chris Yef59a2f42020-10-16 12:55:26 -0700840bool EventHub::hasMscEvent(int32_t deviceId, int mscEvent) const {
841 std::scoped_lock _l(mLock);
842
843 Device* device = getDeviceLocked(deviceId);
844 return mscEvent >= 0 && mscEvent <= MSC_MAX && device != nullptr
845 ? device->mscBitmask.test(mscEvent)
846 : false;
847}
848
Michael Wrightd02c5b62014-02-10 15:10:22 -0800849int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const {
850 if (scanCode >= 0 && scanCode <= KEY_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000851 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800852
853 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700854 if (device != nullptr && device->hasValidFd() && device->keyBitmask.test(scanCode)) {
855 if (device->readDeviceBitMask(EVIOCGKEY(0), device->keyState) >= 0) {
856 return device->keyState.test(scanCode) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800857 }
858 }
859 }
860 return AKEY_STATE_UNKNOWN;
861}
862
863int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const {
Chris Ye87143712020-11-10 05:05:58 +0000864 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800865
866 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700867 if (device != nullptr && device->hasValidFd() && device->keyMap.haveKeyLayout()) {
Arthur Hung7c3ae9c2019-03-11 11:23:03 +0800868 std::vector<int32_t> scanCodes;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800869 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes);
870 if (scanCodes.size() != 0) {
Chris Ye66fbac32020-07-06 20:36:43 -0700871 if (device->readDeviceBitMask(EVIOCGKEY(0), device->keyState) >= 0) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800872 for (size_t i = 0; i < scanCodes.size(); i++) {
Arthur Hung7c3ae9c2019-03-11 11:23:03 +0800873 int32_t sc = scanCodes[i];
Chris Ye66fbac32020-07-06 20:36:43 -0700874 if (sc >= 0 && sc <= KEY_MAX && device->keyState.test(sc)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800875 return AKEY_STATE_DOWN;
876 }
877 }
878 return AKEY_STATE_UP;
879 }
880 }
881 }
882 return AKEY_STATE_UNKNOWN;
883}
884
Philip Junker4af3b3d2021-12-14 10:36:55 +0100885int32_t EventHub::getKeyCodeForKeyLocation(int32_t deviceId, int32_t locationKeyCode) const {
886 std::scoped_lock _l(mLock);
887
888 Device* device = getDeviceLocked(deviceId);
889 if (device == nullptr || !device->hasValidFd() || device->keyMap.keyCharacterMap == nullptr ||
890 device->keyMap.keyLayoutMap == nullptr) {
891 return AKEYCODE_UNKNOWN;
892 }
893 std::vector<int32_t> scanCodes;
894 device->keyMap.keyLayoutMap->findScanCodesForKey(locationKeyCode, &scanCodes);
895 if (scanCodes.empty()) {
896 ALOGW("Failed to get key code for key location: no scan code maps to key code %d for input"
897 "device %d",
898 locationKeyCode, deviceId);
899 return AKEYCODE_UNKNOWN;
900 }
901 if (scanCodes.size() > 1) {
902 ALOGW("Multiple scan codes map to the same key code %d, returning only the first match",
903 locationKeyCode);
904 }
905 int32_t outKeyCode;
906 status_t mapKeyRes =
907 device->getKeyCharacterMap()->mapKey(scanCodes[0], 0 /*usageCode*/, &outKeyCode);
908 switch (mapKeyRes) {
909 case OK:
910 return outKeyCode;
911 case NAME_NOT_FOUND:
912 // key character map doesn't re-map this scanCode, hence the keyCode remains the same
913 return locationKeyCode;
914 default:
915 ALOGW("Failed to get key code for key location: Key character map returned error %s",
916 statusToString(mapKeyRes).c_str());
917 return AKEYCODE_UNKNOWN;
918 }
919}
920
Michael Wrightd02c5b62014-02-10 15:10:22 -0800921int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const {
922 if (sw >= 0 && sw <= SW_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000923 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800924
925 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700926 if (device != nullptr && device->hasValidFd() && device->swBitmask.test(sw)) {
927 if (device->readDeviceBitMask(EVIOCGSW(0), device->swState) >= 0) {
928 return device->swState.test(sw) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800929 }
930 }
931 }
932 return AKEY_STATE_UNKNOWN;
933}
934
935status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const {
936 *outValue = 0;
937
938 if (axis >= 0 && axis <= ABS_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000939 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800940
941 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700942 if (device != nullptr && device->hasValidFd() && device->absBitmask.test(axis)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800943 struct input_absinfo info;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700944 if (ioctl(device->fd, EVIOCGABS(axis), &info)) {
945 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", axis,
946 device->identifier.name.c_str(), device->fd, errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800947 return -errno;
948 }
949
950 *outValue = info.value;
951 return OK;
952 }
953 }
954 return -1;
955}
956
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700957bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,
958 uint8_t* outFlags) const {
Chris Ye87143712020-11-10 05:05:58 +0000959 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800960
961 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700962 if (device != nullptr && device->keyMap.haveKeyLayout()) {
Arthur Hung7c3ae9c2019-03-11 11:23:03 +0800963 std::vector<int32_t> scanCodes;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800964 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) {
965 scanCodes.clear();
966
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700967 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey(keyCodes[codeIndex],
968 &scanCodes);
969 if (!err) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800970 // check the possible scan codes identified by the layout map against the
971 // map of codes actually emitted by the driver
972 for (size_t sc = 0; sc < scanCodes.size(); sc++) {
Chris Ye66fbac32020-07-06 20:36:43 -0700973 if (device->keyBitmask.test(scanCodes[sc])) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800974 outFlags[codeIndex] = 1;
975 break;
976 }
977 }
978 }
979 }
980 return true;
981 }
982 return false;
983}
984
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700985status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, int32_t metaState,
986 int32_t* outKeycode, int32_t* outMetaState, uint32_t* outFlags) const {
Chris Ye87143712020-11-10 05:05:58 +0000987 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800988 Device* device = getDeviceLocked(deviceId);
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -0700989 status_t status = NAME_NOT_FOUND;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800990
Chris Ye66fbac32020-07-06 20:36:43 -0700991 if (device != nullptr) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800992 // Check the key character map first.
Chris Ye3a1e4462020-08-12 10:13:15 -0700993 const std::shared_ptr<KeyCharacterMap> kcm = device->getKeyCharacterMap();
994 if (kcm) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800995 if (!kcm->mapKey(scanCode, usageCode, outKeycode)) {
996 *outFlags = 0;
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -0700997 status = NO_ERROR;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800998 }
999 }
1000
1001 // Check the key layout next.
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -07001002 if (status != NO_ERROR && device->keyMap.haveKeyLayout()) {
Siarhei Vishniakou592bac22018-11-08 19:42:38 -08001003 if (!device->keyMap.keyLayoutMap->mapKey(scanCode, usageCode, outKeycode, outFlags)) {
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -07001004 status = NO_ERROR;
1005 }
1006 }
1007
1008 if (status == NO_ERROR) {
Chris Ye3a1e4462020-08-12 10:13:15 -07001009 if (kcm) {
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -07001010 kcm->tryRemapKey(*outKeycode, metaState, outKeycode, outMetaState);
1011 } else {
1012 *outMetaState = metaState;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001013 }
1014 }
1015 }
1016
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -07001017 if (status != NO_ERROR) {
1018 *outKeycode = 0;
1019 *outFlags = 0;
1020 *outMetaState = metaState;
1021 }
1022
1023 return status;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001024}
1025
1026status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const {
Chris Ye87143712020-11-10 05:05:58 +00001027 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001028 Device* device = getDeviceLocked(deviceId);
1029
Chris Ye66fbac32020-07-06 20:36:43 -07001030 if (device != nullptr && device->keyMap.haveKeyLayout()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001031 status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo);
1032 if (err == NO_ERROR) {
1033 return NO_ERROR;
1034 }
1035 }
1036
1037 return NAME_NOT_FOUND;
1038}
1039
Chris Yef59a2f42020-10-16 12:55:26 -07001040base::Result<std::pair<InputDeviceSensorType, int32_t>> EventHub::mapSensor(int32_t deviceId,
1041 int32_t absCode) {
1042 std::scoped_lock _l(mLock);
1043 Device* device = getDeviceLocked(deviceId);
1044
1045 if (device != nullptr && device->keyMap.haveKeyLayout()) {
1046 return device->keyMap.keyLayoutMap->mapSensor(absCode);
1047 }
1048 return Errorf("Device not found or device has no key layout.");
1049}
1050
Chris Yee2b1e5c2021-03-10 22:45:12 -08001051// Gets the battery info map from battery ID to RawBatteryInfo of the miscellaneous device
1052// associated with the device ID. Returns an empty map if no miscellaneous device found.
1053const std::unordered_map<int32_t, RawBatteryInfo>& EventHub::getBatteryInfoLocked(
1054 int32_t deviceId) const {
1055 static const std::unordered_map<int32_t, RawBatteryInfo> EMPTY_BATTERY_INFO = {};
1056 Device* device = getDeviceLocked(deviceId);
Chris Ye1dd2e5c2021-04-04 23:12:41 -07001057 if (device == nullptr || !device->associatedDevice) {
Chris Yee2b1e5c2021-03-10 22:45:12 -08001058 return EMPTY_BATTERY_INFO;
1059 }
Chris Ye1dd2e5c2021-04-04 23:12:41 -07001060 return device->associatedDevice->batteryInfos;
Chris Yee2b1e5c2021-03-10 22:45:12 -08001061}
1062
1063const std::vector<int32_t> EventHub::getRawBatteryIds(int32_t deviceId) {
1064 std::scoped_lock _l(mLock);
1065 std::vector<int32_t> batteryIds;
1066
1067 for (const auto [id, info] : getBatteryInfoLocked(deviceId)) {
1068 batteryIds.push_back(id);
1069 }
1070
1071 return batteryIds;
1072}
1073
1074std::optional<RawBatteryInfo> EventHub::getRawBatteryInfo(int32_t deviceId, int32_t batteryId) {
1075 std::scoped_lock _l(mLock);
1076
1077 const auto infos = getBatteryInfoLocked(deviceId);
1078
1079 auto it = infos.find(batteryId);
1080 if (it != infos.end()) {
1081 return it->second;
1082 }
1083
1084 return std::nullopt;
1085}
1086
1087// Gets the light info map from light ID to RawLightInfo of the miscellaneous device associated
1088// with the deivice ID. Returns an empty map if no miscellaneous device found.
1089const std::unordered_map<int32_t, RawLightInfo>& EventHub::getLightInfoLocked(
1090 int32_t deviceId) const {
1091 static const std::unordered_map<int32_t, RawLightInfo> EMPTY_LIGHT_INFO = {};
1092 Device* device = getDeviceLocked(deviceId);
Chris Ye1dd2e5c2021-04-04 23:12:41 -07001093 if (device == nullptr || !device->associatedDevice) {
Chris Yee2b1e5c2021-03-10 22:45:12 -08001094 return EMPTY_LIGHT_INFO;
1095 }
Chris Ye1dd2e5c2021-04-04 23:12:41 -07001096 return device->associatedDevice->lightInfos;
Chris Yee2b1e5c2021-03-10 22:45:12 -08001097}
1098
Chris Ye3fdbfef2021-01-06 18:45:18 -08001099const std::vector<int32_t> EventHub::getRawLightIds(int32_t deviceId) {
1100 std::scoped_lock _l(mLock);
Chris Ye3fdbfef2021-01-06 18:45:18 -08001101 std::vector<int32_t> lightIds;
1102
Chris Yee2b1e5c2021-03-10 22:45:12 -08001103 for (const auto [id, info] : getLightInfoLocked(deviceId)) {
1104 lightIds.push_back(id);
Chris Ye3fdbfef2021-01-06 18:45:18 -08001105 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001106
Chris Ye3fdbfef2021-01-06 18:45:18 -08001107 return lightIds;
1108}
1109
1110std::optional<RawLightInfo> EventHub::getRawLightInfo(int32_t deviceId, int32_t lightId) {
1111 std::scoped_lock _l(mLock);
Chris Ye3fdbfef2021-01-06 18:45:18 -08001112
Chris Yee2b1e5c2021-03-10 22:45:12 -08001113 const auto infos = getLightInfoLocked(deviceId);
1114
1115 auto it = infos.find(lightId);
1116 if (it != infos.end()) {
1117 return it->second;
Chris Ye3fdbfef2021-01-06 18:45:18 -08001118 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001119
Chris Ye3fdbfef2021-01-06 18:45:18 -08001120 return std::nullopt;
1121}
1122
1123std::optional<int32_t> EventHub::getLightBrightness(int32_t deviceId, int32_t lightId) {
1124 std::scoped_lock _l(mLock);
1125
Chris Yee2b1e5c2021-03-10 22:45:12 -08001126 const auto infos = getLightInfoLocked(deviceId);
1127 auto it = infos.find(lightId);
1128 if (it == infos.end()) {
Chris Ye3fdbfef2021-01-06 18:45:18 -08001129 return std::nullopt;
1130 }
1131 std::string buffer;
1132 if (!base::ReadFileToString(it->second.path / LIGHT_NODES.at(InputLightClass::BRIGHTNESS),
1133 &buffer)) {
1134 return std::nullopt;
1135 }
1136 return std::stoi(buffer);
1137}
1138
1139std::optional<std::unordered_map<LightColor, int32_t>> EventHub::getLightIntensities(
1140 int32_t deviceId, int32_t lightId) {
1141 std::scoped_lock _l(mLock);
1142
Chris Yee2b1e5c2021-03-10 22:45:12 -08001143 const auto infos = getLightInfoLocked(deviceId);
1144 auto lightIt = infos.find(lightId);
1145 if (lightIt == infos.end()) {
Chris Ye3fdbfef2021-01-06 18:45:18 -08001146 return std::nullopt;
1147 }
1148
1149 auto ret =
1150 getColorIndexArray(lightIt->second.path / LIGHT_NODES.at(InputLightClass::MULTI_INDEX));
1151
1152 if (!ret.has_value()) {
1153 return std::nullopt;
1154 }
1155 std::array<LightColor, COLOR_NUM> colors = ret.value();
1156
1157 std::string intensityStr;
1158 if (!base::ReadFileToString(lightIt->second.path /
1159 LIGHT_NODES.at(InputLightClass::MULTI_INTENSITY),
1160 &intensityStr)) {
1161 return std::nullopt;
1162 }
1163
1164 // Intensity node outputs 3 color values
1165 std::regex intensityPattern("([0-9]+)\\s([0-9]+)\\s([0-9]+)[\\n]");
1166 std::smatch results;
1167
1168 if (!std::regex_match(intensityStr, results, intensityPattern)) {
1169 return std::nullopt;
1170 }
1171 std::unordered_map<LightColor, int32_t> intensities;
1172 for (size_t i = 1; i < results.size(); i++) {
1173 int value = std::stoi(results[i].str());
1174 intensities.emplace(colors[i - 1], value);
1175 }
1176 return intensities;
1177}
1178
1179void EventHub::setLightBrightness(int32_t deviceId, int32_t lightId, int32_t brightness) {
1180 std::scoped_lock _l(mLock);
1181
Chris Yee2b1e5c2021-03-10 22:45:12 -08001182 const auto infos = getLightInfoLocked(deviceId);
1183 auto lightIt = infos.find(lightId);
1184 if (lightIt == infos.end()) {
1185 ALOGE("%s lightId %d not found ", __func__, lightId);
Chris Ye3fdbfef2021-01-06 18:45:18 -08001186 return;
1187 }
1188
1189 if (!base::WriteStringToFile(std::to_string(brightness),
1190 lightIt->second.path /
1191 LIGHT_NODES.at(InputLightClass::BRIGHTNESS))) {
1192 ALOGE("Can not write to file, error: %s", strerror(errno));
1193 }
1194}
1195
1196void EventHub::setLightIntensities(int32_t deviceId, int32_t lightId,
1197 std::unordered_map<LightColor, int32_t> intensities) {
1198 std::scoped_lock _l(mLock);
1199
Chris Yee2b1e5c2021-03-10 22:45:12 -08001200 const auto infos = getLightInfoLocked(deviceId);
1201 auto lightIt = infos.find(lightId);
1202 if (lightIt == infos.end()) {
Chris Ye3fdbfef2021-01-06 18:45:18 -08001203 ALOGE("Light Id %d does not exist.", lightId);
1204 return;
1205 }
1206
1207 auto ret =
1208 getColorIndexArray(lightIt->second.path / LIGHT_NODES.at(InputLightClass::MULTI_INDEX));
1209
1210 if (!ret.has_value()) {
1211 return;
1212 }
1213 std::array<LightColor, COLOR_NUM> colors = ret.value();
1214
1215 std::string rgbStr;
1216 for (size_t i = 0; i < COLOR_NUM; i++) {
1217 auto it = intensities.find(colors[i]);
1218 if (it != intensities.end()) {
1219 rgbStr += std::to_string(it->second);
1220 // Insert space between colors
1221 if (i < COLOR_NUM - 1) {
1222 rgbStr += " ";
1223 }
1224 }
1225 }
1226 // Append new line
1227 rgbStr += "\n";
1228
1229 if (!base::WriteStringToFile(rgbStr,
1230 lightIt->second.path /
1231 LIGHT_NODES.at(InputLightClass::MULTI_INTENSITY))) {
1232 ALOGE("Can not write to file, error: %s", strerror(errno));
1233 }
1234}
1235
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001236void EventHub::setExcludedDevices(const std::vector<std::string>& devices) {
Chris Ye87143712020-11-10 05:05:58 +00001237 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001238
1239 mExcludedDevices = devices;
1240}
1241
1242bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const {
Chris Ye87143712020-11-10 05:05:58 +00001243 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001244 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001245 if (device != nullptr && scanCode >= 0 && scanCode <= KEY_MAX) {
1246 return device->keyBitmask.test(scanCode);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001247 }
1248 return false;
1249}
1250
Arthur Hungcb40a002021-08-03 14:31:01 +00001251bool EventHub::hasKeyCode(int32_t deviceId, int32_t keyCode) const {
1252 std::scoped_lock _l(mLock);
1253 Device* device = getDeviceLocked(deviceId);
1254 if (device != nullptr) {
1255 return device->hasKeycodeLocked(keyCode);
1256 }
1257 return false;
1258}
1259
Michael Wrightd02c5b62014-02-10 15:10:22 -08001260bool EventHub::hasLed(int32_t deviceId, int32_t led) const {
Chris Ye87143712020-11-10 05:05:58 +00001261 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001262 Device* device = getDeviceLocked(deviceId);
1263 int32_t sc;
Chris Ye989bb932020-07-04 16:18:59 -07001264 if (device != nullptr && device->mapLed(led, &sc) == NO_ERROR) {
Chris Ye66fbac32020-07-06 20:36:43 -07001265 return device->ledBitmask.test(sc);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001266 }
1267 return false;
1268}
1269
1270void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) {
Chris Ye87143712020-11-10 05:05:58 +00001271 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001272 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -07001273 if (device != nullptr && device->hasValidFd()) {
1274 device->setLedStateLocked(led, on);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001275 }
1276}
1277
1278void EventHub::getVirtualKeyDefinitions(int32_t deviceId,
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001279 std::vector<VirtualKeyDefinition>& outVirtualKeys) const {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001280 outVirtualKeys.clear();
1281
Chris Ye87143712020-11-10 05:05:58 +00001282 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001283 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001284 if (device != nullptr && device->virtualKeyMap) {
Arthur Hung7c3ae9c2019-03-11 11:23:03 +08001285 const std::vector<VirtualKeyDefinition> virtualKeys =
1286 device->virtualKeyMap->getVirtualKeys();
1287 outVirtualKeys.insert(outVirtualKeys.end(), virtualKeys.begin(), virtualKeys.end());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001288 }
1289}
1290
Chris Ye3a1e4462020-08-12 10:13:15 -07001291const std::shared_ptr<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const {
Chris Ye87143712020-11-10 05:05:58 +00001292 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001293 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001294 if (device != nullptr) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001295 return device->getKeyCharacterMap();
1296 }
Yi Kong9b14ac62018-07-17 13:48:38 -07001297 return nullptr;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001298}
1299
Chris Ye3a1e4462020-08-12 10:13:15 -07001300bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId, std::shared_ptr<KeyCharacterMap> map) {
Chris Ye87143712020-11-10 05:05:58 +00001301 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001302 Device* device = getDeviceLocked(deviceId);
Philip Junker90bc9492021-12-10 18:39:42 +01001303 if (device == nullptr || map == nullptr || device->keyMap.keyCharacterMap == nullptr) {
1304 return false;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001305 }
Philip Junker90bc9492021-12-10 18:39:42 +01001306 device->keyMap.keyCharacterMap->combine(*map);
1307 return true;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001308}
1309
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001310static std::string generateDescriptor(InputDeviceIdentifier& identifier) {
1311 std::string rawDescriptor;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001312 rawDescriptor += StringPrintf(":%04x:%04x:", identifier.vendor, identifier.product);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001313 // TODO add handling for USB devices to not uniqueify kbs that show up twice
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001314 if (!identifier.uniqueId.empty()) {
1315 rawDescriptor += "uniqueId:";
1316 rawDescriptor += identifier.uniqueId;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001317 } else if (identifier.nonce != 0) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001318 rawDescriptor += StringPrintf("nonce:%04x", identifier.nonce);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001319 }
1320
1321 if (identifier.vendor == 0 && identifier.product == 0) {
1322 // If we don't know the vendor and product id, then the device is probably
1323 // built-in so we need to rely on other information to uniquely identify
1324 // the input device. Usually we try to avoid relying on the device name or
1325 // location but for built-in input device, they are unlikely to ever change.
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001326 if (!identifier.name.empty()) {
1327 rawDescriptor += "name:";
1328 rawDescriptor += identifier.name;
1329 } else if (!identifier.location.empty()) {
1330 rawDescriptor += "location:";
1331 rawDescriptor += identifier.location;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001332 }
1333 }
1334 identifier.descriptor = sha1(rawDescriptor);
1335 return rawDescriptor;
1336}
1337
1338void EventHub::assignDescriptorLocked(InputDeviceIdentifier& identifier) {
1339 // Compute a device descriptor that uniquely identifies the device.
1340 // The descriptor is assumed to be a stable identifier. Its value should not
1341 // change between reboots, reconnections, firmware updates or new releases
1342 // of Android. In practice we sometimes get devices that cannot be uniquely
1343 // identified. In this case we enforce uniqueness between connected devices.
1344 // Ideally, we also want the descriptor to be short and relatively opaque.
1345
1346 identifier.nonce = 0;
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001347 std::string rawDescriptor = generateDescriptor(identifier);
1348 if (identifier.uniqueId.empty()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001349 // If it didn't have a unique id check for conflicts and enforce
1350 // uniqueness if necessary.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001351 while (getDeviceByDescriptorLocked(identifier.descriptor) != nullptr) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001352 identifier.nonce++;
1353 rawDescriptor = generateDescriptor(identifier);
1354 }
1355 }
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001356 ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.c_str(),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001357 identifier.descriptor.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001358}
1359
Nathaniel R. Lewiscacd69a2019-08-12 22:07:00 +00001360void EventHub::vibrate(int32_t deviceId, const VibrationElement& element) {
Chris Ye87143712020-11-10 05:05:58 +00001361 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001362 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001363 if (device != nullptr && device->hasValidFd()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001364 ff_effect effect;
1365 memset(&effect, 0, sizeof(effect));
1366 effect.type = FF_RUMBLE;
1367 effect.id = device->ffEffectId;
Nathaniel R. Lewiscacd69a2019-08-12 22:07:00 +00001368 // evdev FF_RUMBLE effect only supports two channels of vibration.
Chris Ye6393a262020-08-04 19:41:36 -07001369 effect.u.rumble.strong_magnitude = element.getMagnitude(FF_STRONG_MAGNITUDE_CHANNEL_IDX);
1370 effect.u.rumble.weak_magnitude = element.getMagnitude(FF_WEAK_MAGNITUDE_CHANNEL_IDX);
Nathaniel R. Lewiscacd69a2019-08-12 22:07:00 +00001371 effect.replay.length = element.duration.count();
Michael Wrightd02c5b62014-02-10 15:10:22 -08001372 effect.replay.delay = 0;
1373 if (ioctl(device->fd, EVIOCSFF, &effect)) {
1374 ALOGW("Could not upload force feedback effect to device %s due to error %d.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001375 device->identifier.name.c_str(), errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001376 return;
1377 }
1378 device->ffEffectId = effect.id;
1379
1380 struct input_event ev;
1381 ev.time.tv_sec = 0;
1382 ev.time.tv_usec = 0;
1383 ev.type = EV_FF;
1384 ev.code = device->ffEffectId;
1385 ev.value = 1;
1386 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
1387 ALOGW("Could not start force feedback effect on device %s due to error %d.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001388 device->identifier.name.c_str(), errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001389 return;
1390 }
1391 device->ffEffectPlaying = true;
1392 }
1393}
1394
1395void EventHub::cancelVibrate(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00001396 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001397 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001398 if (device != nullptr && device->hasValidFd()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001399 if (device->ffEffectPlaying) {
1400 device->ffEffectPlaying = false;
1401
1402 struct input_event ev;
1403 ev.time.tv_sec = 0;
1404 ev.time.tv_usec = 0;
1405 ev.type = EV_FF;
1406 ev.code = device->ffEffectId;
1407 ev.value = 0;
1408 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
1409 ALOGW("Could not stop force feedback effect on device %s due to error %d.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001410 device->identifier.name.c_str(), errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001411 return;
1412 }
1413 }
1414 }
1415}
1416
Chris Ye87143712020-11-10 05:05:58 +00001417std::vector<int32_t> EventHub::getVibratorIds(int32_t deviceId) {
1418 std::scoped_lock _l(mLock);
1419 std::vector<int32_t> vibrators;
1420 Device* device = getDeviceLocked(deviceId);
1421 if (device != nullptr && device->hasValidFd() &&
1422 device->classes.test(InputDeviceClass::VIBRATOR)) {
1423 vibrators.push_back(FF_STRONG_MAGNITUDE_CHANNEL_IDX);
1424 vibrators.push_back(FF_WEAK_MAGNITUDE_CHANNEL_IDX);
1425 }
1426 return vibrators;
1427}
1428
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001429EventHub::Device* EventHub::getDeviceByDescriptorLocked(const std::string& descriptor) const {
Chris Ye989bb932020-07-04 16:18:59 -07001430 for (const auto& [id, device] : mDevices) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001431 if (descriptor == device->identifier.descriptor) {
Chris Ye989bb932020-07-04 16:18:59 -07001432 return device.get();
Michael Wrightd02c5b62014-02-10 15:10:22 -08001433 }
1434 }
Yi Kong9b14ac62018-07-17 13:48:38 -07001435 return nullptr;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001436}
1437
1438EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const {
Prabir Pradhancae4b3a2019-02-05 18:51:32 -08001439 if (deviceId == ReservedInputDeviceId::BUILT_IN_KEYBOARD_ID) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001440 deviceId = mBuiltInKeyboardId;
1441 }
Chris Ye989bb932020-07-04 16:18:59 -07001442 const auto& it = mDevices.find(deviceId);
1443 return it != mDevices.end() ? it->second.get() : nullptr;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001444}
1445
Chris Ye8594e192020-07-14 10:34:06 -07001446EventHub::Device* EventHub::getDeviceByPathLocked(const std::string& devicePath) const {
Chris Ye989bb932020-07-04 16:18:59 -07001447 for (const auto& [id, device] : mDevices) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001448 if (device->path == devicePath) {
Chris Ye989bb932020-07-04 16:18:59 -07001449 return device.get();
Michael Wrightd02c5b62014-02-10 15:10:22 -08001450 }
1451 }
Yi Kong9b14ac62018-07-17 13:48:38 -07001452 return nullptr;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001453}
1454
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001455/**
1456 * The file descriptor could be either input device, or a video device (associated with a
1457 * specific input device). Check both cases here, and return the device that this event
1458 * belongs to. Caller can compare the fd's once more to determine event type.
1459 * Looks through all input devices, and only attached video devices. Unattached video
1460 * devices are ignored.
1461 */
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001462EventHub::Device* EventHub::getDeviceByFdLocked(int fd) const {
Chris Ye989bb932020-07-04 16:18:59 -07001463 for (const auto& [id, device] : mDevices) {
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001464 if (device->fd == fd) {
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001465 // This is an input device event
Chris Ye989bb932020-07-04 16:18:59 -07001466 return device.get();
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001467 }
1468 if (device->videoDevice && device->videoDevice->getFd() == fd) {
1469 // This is a video device event
Chris Ye989bb932020-07-04 16:18:59 -07001470 return device.get();
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001471 }
1472 }
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001473 // We do not check mUnattachedVideoDevices here because they should not participate in epoll,
1474 // and therefore should never be looked up by fd.
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001475 return nullptr;
1476}
1477
Chris Yee2b1e5c2021-03-10 22:45:12 -08001478std::optional<int32_t> EventHub::getBatteryCapacity(int32_t deviceId, int32_t batteryId) const {
Kim Low03ea0352020-11-06 12:45:07 -08001479 std::scoped_lock _l(mLock);
Kim Low03ea0352020-11-06 12:45:07 -08001480
Chris Yee2b1e5c2021-03-10 22:45:12 -08001481 const auto infos = getBatteryInfoLocked(deviceId);
1482 auto it = infos.find(batteryId);
1483 if (it == infos.end()) {
Kim Low03ea0352020-11-06 12:45:07 -08001484 return std::nullopt;
1485 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001486 std::string buffer;
Kim Low03ea0352020-11-06 12:45:07 -08001487
1488 // Some devices report battery capacity as an integer through the "capacity" file
Chris Yee2b1e5c2021-03-10 22:45:12 -08001489 if (base::ReadFileToString(it->second.path / BATTERY_NODES.at(InputBatteryClass::CAPACITY),
1490 &buffer)) {
Chris Yed1936772021-02-22 10:30:40 -08001491 return std::stoi(base::Trim(buffer));
Kim Low03ea0352020-11-06 12:45:07 -08001492 }
1493
1494 // Other devices report capacity as an enum value POWER_SUPPLY_CAPACITY_LEVEL_XXX
1495 // These values are taken from kernel source code include/linux/power_supply.h
Chris Yee2b1e5c2021-03-10 22:45:12 -08001496 if (base::ReadFileToString(it->second.path /
1497 BATTERY_NODES.at(InputBatteryClass::CAPACITY_LEVEL),
1498 &buffer)) {
Chris Yed1936772021-02-22 10:30:40 -08001499 // Remove any white space such as trailing new line
Chris Yee2b1e5c2021-03-10 22:45:12 -08001500 const auto levelIt = BATTERY_LEVEL.find(base::Trim(buffer));
1501 if (levelIt != BATTERY_LEVEL.end()) {
1502 return levelIt->second;
Kim Low03ea0352020-11-06 12:45:07 -08001503 }
1504 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001505
Kim Low03ea0352020-11-06 12:45:07 -08001506 return std::nullopt;
1507}
1508
Chris Yee2b1e5c2021-03-10 22:45:12 -08001509std::optional<int32_t> EventHub::getBatteryStatus(int32_t deviceId, int32_t batteryId) const {
Kim Low03ea0352020-11-06 12:45:07 -08001510 std::scoped_lock _l(mLock);
Chris Yee2b1e5c2021-03-10 22:45:12 -08001511 const auto infos = getBatteryInfoLocked(deviceId);
1512 auto it = infos.find(batteryId);
1513 if (it == infos.end()) {
Kim Low03ea0352020-11-06 12:45:07 -08001514 return std::nullopt;
1515 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001516 std::string buffer;
Kim Low03ea0352020-11-06 12:45:07 -08001517
Chris Yee2b1e5c2021-03-10 22:45:12 -08001518 if (!base::ReadFileToString(it->second.path / BATTERY_NODES.at(InputBatteryClass::STATUS),
1519 &buffer)) {
Kim Low03ea0352020-11-06 12:45:07 -08001520 ALOGE("Failed to read sysfs battery info: %s", strerror(errno));
1521 return std::nullopt;
1522 }
1523
Chris Yed1936772021-02-22 10:30:40 -08001524 // Remove white space like trailing new line
Chris Yee2b1e5c2021-03-10 22:45:12 -08001525 const auto statusIt = BATTERY_STATUS.find(base::Trim(buffer));
1526 if (statusIt != BATTERY_STATUS.end()) {
1527 return statusIt->second;
Kim Low03ea0352020-11-06 12:45:07 -08001528 }
1529
1530 return std::nullopt;
1531}
1532
Michael Wrightd02c5b62014-02-10 15:10:22 -08001533size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) {
1534 ALOG_ASSERT(bufferSize >= 1);
1535
Chris Ye87143712020-11-10 05:05:58 +00001536 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001537
1538 struct input_event readBuffer[bufferSize];
1539
1540 RawEvent* event = buffer;
1541 size_t capacity = bufferSize;
1542 bool awoken = false;
1543 for (;;) {
1544 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
1545
1546 // Reopen input devices if needed.
1547 if (mNeedToReopenDevices) {
1548 mNeedToReopenDevices = false;
1549
1550 ALOGI("Reopening all input devices due to a configuration change.");
1551
1552 closeAllDevicesLocked();
1553 mNeedToScanDevices = true;
1554 break; // return to the caller before we actually rescan
1555 }
1556
1557 // Report any devices that had last been added/removed.
Chris Ye989bb932020-07-04 16:18:59 -07001558 for (auto it = mClosingDevices.begin(); it != mClosingDevices.end();) {
1559 std::unique_ptr<Device> device = std::move(*it);
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001560 ALOGV("Reporting device closed: id=%d, name=%s\n", device->id, device->path.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001561 event->when = now;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001562 event->deviceId = (device->id == mBuiltInKeyboardId)
1563 ? ReservedInputDeviceId::BUILT_IN_KEYBOARD_ID
1564 : device->id;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001565 event->type = DEVICE_REMOVED;
1566 event += 1;
Chris Ye989bb932020-07-04 16:18:59 -07001567 it = mClosingDevices.erase(it);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001568 mNeedToSendFinishedDeviceScan = true;
1569 if (--capacity == 0) {
1570 break;
1571 }
1572 }
1573
1574 if (mNeedToScanDevices) {
1575 mNeedToScanDevices = false;
1576 scanDevicesLocked();
1577 mNeedToSendFinishedDeviceScan = true;
1578 }
1579
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05001580 while (!mOpeningDevices.empty()) {
1581 std::unique_ptr<Device> device = std::move(*mOpeningDevices.rbegin());
1582 mOpeningDevices.pop_back();
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001583 ALOGV("Reporting device opened: id=%d, name=%s\n", device->id, device->path.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001584 event->when = now;
1585 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
1586 event->type = DEVICE_ADDED;
1587 event += 1;
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05001588
1589 // Try to find a matching video device by comparing device names
1590 for (auto it = mUnattachedVideoDevices.begin(); it != mUnattachedVideoDevices.end();
1591 it++) {
1592 std::unique_ptr<TouchVideoDevice>& videoDevice = *it;
Chris Yed3fef462021-03-07 17:10:08 -08001593 if (tryAddVideoDeviceLocked(*device, videoDevice)) {
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05001594 // videoDevice was transferred to 'device'
1595 it = mUnattachedVideoDevices.erase(it);
1596 break;
1597 }
1598 }
1599
1600 auto [dev_it, inserted] = mDevices.insert_or_assign(device->id, std::move(device));
1601 if (!inserted) {
Chris Ye989bb932020-07-04 16:18:59 -07001602 ALOGW("Device id %d exists, replaced.", device->id);
1603 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08001604 mNeedToSendFinishedDeviceScan = true;
1605 if (--capacity == 0) {
1606 break;
1607 }
1608 }
1609
1610 if (mNeedToSendFinishedDeviceScan) {
1611 mNeedToSendFinishedDeviceScan = false;
1612 event->when = now;
1613 event->type = FINISHED_DEVICE_SCAN;
1614 event += 1;
1615 if (--capacity == 0) {
1616 break;
1617 }
1618 }
1619
1620 // Grab the next input event.
1621 bool deviceChanged = false;
1622 while (mPendingEventIndex < mPendingEventCount) {
1623 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++];
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001624 if (eventItem.data.fd == mINotifyFd) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001625 if (eventItem.events & EPOLLIN) {
1626 mPendingINotify = true;
1627 } else {
1628 ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events);
1629 }
1630 continue;
1631 }
1632
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001633 if (eventItem.data.fd == mWakeReadPipeFd) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001634 if (eventItem.events & EPOLLIN) {
1635 ALOGV("awoken after wake()");
1636 awoken = true;
Siarhei Vishniakoub4d960d2019-10-03 15:38:44 -05001637 char wakeReadBuffer[16];
Michael Wrightd02c5b62014-02-10 15:10:22 -08001638 ssize_t nRead;
1639 do {
Siarhei Vishniakoub4d960d2019-10-03 15:38:44 -05001640 nRead = read(mWakeReadPipeFd, wakeReadBuffer, sizeof(wakeReadBuffer));
1641 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(wakeReadBuffer));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001642 } else {
1643 ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001644 eventItem.events);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001645 }
1646 continue;
1647 }
1648
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001649 Device* device = getDeviceByFdLocked(eventItem.data.fd);
Chris Ye989bb932020-07-04 16:18:59 -07001650 if (device == nullptr) {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001651 ALOGE("Received unexpected epoll event 0x%08x for unknown fd %d.", eventItem.events,
1652 eventItem.data.fd);
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001653 ALOG_ASSERT(!DEBUG);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001654 continue;
1655 }
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001656 if (device->videoDevice && eventItem.data.fd == device->videoDevice->getFd()) {
1657 if (eventItem.events & EPOLLIN) {
1658 size_t numFrames = device->videoDevice->readAndQueueFrames();
1659 if (numFrames == 0) {
1660 ALOGE("Received epoll event for video device %s, but could not read frame",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001661 device->videoDevice->getName().c_str());
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001662 }
1663 } else if (eventItem.events & EPOLLHUP) {
1664 // TODO(b/121395353) - consider adding EPOLLRDHUP
1665 ALOGI("Removing video device %s due to epoll hang-up event.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001666 device->videoDevice->getName().c_str());
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001667 unregisterVideoDeviceFromEpollLocked(*device->videoDevice);
1668 device->videoDevice = nullptr;
1669 } else {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001670 ALOGW("Received unexpected epoll event 0x%08x for device %s.", eventItem.events,
1671 device->videoDevice->getName().c_str());
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001672 ALOG_ASSERT(!DEBUG);
1673 }
1674 continue;
1675 }
1676 // This must be an input event
Michael Wrightd02c5b62014-02-10 15:10:22 -08001677 if (eventItem.events & EPOLLIN) {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001678 int32_t readSize =
1679 read(device->fd, readBuffer, sizeof(struct input_event) * capacity);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001680 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) {
1681 // Device was removed before INotify noticed.
Mark Salyzyn5aa26b22014-06-10 13:07:44 -07001682 ALOGW("could not get event, removed? (fd: %d size: %" PRId32
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001683 " bufferSize: %zu capacity: %zu errno: %d)\n",
1684 device->fd, readSize, bufferSize, capacity, errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001685 deviceChanged = true;
Chris Ye989bb932020-07-04 16:18:59 -07001686 closeDeviceLocked(*device);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001687 } else if (readSize < 0) {
1688 if (errno != EAGAIN && errno != EINTR) {
1689 ALOGW("could not get event (errno=%d)", errno);
1690 }
1691 } else if ((readSize % sizeof(struct input_event)) != 0) {
1692 ALOGE("could not get event (wrong size: %d)", readSize);
1693 } else {
1694 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
1695
1696 size_t count = size_t(readSize) / sizeof(struct input_event);
1697 for (size_t i = 0; i < count; i++) {
1698 struct input_event& iev = readBuffer[i];
Siarhei Vishniakou592bac22018-11-08 19:42:38 -08001699 event->when = processEventTimestamp(iev);
Siarhei Vishniakou58ba3d12021-02-11 01:31:07 +00001700 event->readTime = systemTime(SYSTEM_TIME_MONOTONIC);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001701 event->deviceId = deviceId;
1702 event->type = iev.type;
1703 event->code = iev.code;
1704 event->value = iev.value;
1705 event += 1;
1706 capacity -= 1;
1707 }
1708 if (capacity == 0) {
1709 // The result buffer is full. Reset the pending event index
1710 // so we will try to read the device again on the next iteration.
1711 mPendingEventIndex -= 1;
1712 break;
1713 }
1714 }
1715 } else if (eventItem.events & EPOLLHUP) {
1716 ALOGI("Removing device %s due to epoll hang-up event.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001717 device->identifier.name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001718 deviceChanged = true;
Chris Ye989bb932020-07-04 16:18:59 -07001719 closeDeviceLocked(*device);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001720 } else {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001721 ALOGW("Received unexpected epoll event 0x%08x for device %s.", eventItem.events,
1722 device->identifier.name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001723 }
1724 }
1725
1726 // readNotify() will modify the list of devices so this must be done after
1727 // processing all other events to ensure that we read all remaining events
1728 // before closing the devices.
1729 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) {
1730 mPendingINotify = false;
1731 readNotifyLocked();
1732 deviceChanged = true;
1733 }
1734
1735 // Report added or removed devices immediately.
1736 if (deviceChanged) {
1737 continue;
1738 }
1739
1740 // Return now if we have collected any events or if we were explicitly awoken.
1741 if (event != buffer || awoken) {
1742 break;
1743 }
1744
Siarhei Vishniakou4b5a87f2019-09-24 13:03:58 +01001745 // Poll for events.
1746 // When a device driver has pending (unread) events, it acquires
1747 // a kernel wake lock. Once the last pending event has been read, the device
1748 // driver will release the kernel wake lock, but the epoll will hold the wakelock,
1749 // since we are using EPOLLWAKEUP. The wakelock is released by the epoll when epoll_wait
1750 // is called again for the same fd that produced the event.
1751 // Thus the system can only sleep if there are no events pending or
1752 // currently being processed.
Michael Wrightd02c5b62014-02-10 15:10:22 -08001753 //
1754 // The timeout is advisory only. If the device is asleep, it will not wake just to
1755 // service the timeout.
1756 mPendingEventIndex = 0;
1757
Siarhei Vishniakou4b5a87f2019-09-24 13:03:58 +01001758 mLock.unlock(); // release lock before poll
Michael Wrightd02c5b62014-02-10 15:10:22 -08001759
1760 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis);
1761
Siarhei Vishniakou4b5a87f2019-09-24 13:03:58 +01001762 mLock.lock(); // reacquire lock after poll
Michael Wrightd02c5b62014-02-10 15:10:22 -08001763
1764 if (pollResult == 0) {
1765 // Timed out.
1766 mPendingEventCount = 0;
1767 break;
1768 }
1769
1770 if (pollResult < 0) {
1771 // An error occurred.
1772 mPendingEventCount = 0;
1773
1774 // Sleep after errors to avoid locking up the system.
1775 // Hopefully the error is transient.
1776 if (errno != EINTR) {
1777 ALOGW("poll failed (errno=%d)\n", errno);
1778 usleep(100000);
1779 }
1780 } else {
1781 // Some events occurred.
1782 mPendingEventCount = size_t(pollResult);
1783 }
1784 }
1785
1786 // All done, return the number of events we read.
1787 return event - buffer;
1788}
1789
Siarhei Vishniakouadd89292018-12-13 19:23:36 -08001790std::vector<TouchVideoFrame> EventHub::getVideoFrames(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00001791 std::scoped_lock _l(mLock);
Siarhei Vishniakouadd89292018-12-13 19:23:36 -08001792
1793 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001794 if (device == nullptr || !device->videoDevice) {
Siarhei Vishniakouadd89292018-12-13 19:23:36 -08001795 return {};
1796 }
1797 return device->videoDevice->consumeFrames();
1798}
1799
Michael Wrightd02c5b62014-02-10 15:10:22 -08001800void EventHub::wake() {
1801 ALOGV("wake() called");
1802
1803 ssize_t nWrite;
1804 do {
1805 nWrite = write(mWakeWritePipeFd, "W", 1);
1806 } while (nWrite == -1 && errno == EINTR);
1807
1808 if (nWrite != 1 && errno != EAGAIN) {
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08001809 ALOGW("Could not write wake signal: %s", strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001810 }
1811}
1812
1813void EventHub::scanDevicesLocked() {
Usama Arifb27c8e62021-06-03 16:44:09 +01001814 status_t result;
1815 std::error_code errorCode;
1816
1817 if (std::filesystem::exists(DEVICE_INPUT_PATH, errorCode)) {
1818 result = scanDirLocked(DEVICE_INPUT_PATH);
1819 if (result < 0) {
1820 ALOGE("scan dir failed for %s", DEVICE_INPUT_PATH);
1821 }
1822 } else {
1823 if (errorCode) {
1824 ALOGW("Could not run filesystem::exists() due to error %d : %s.", errorCode.value(),
1825 errorCode.message().c_str());
1826 }
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08001827 }
Philip Quinn39b81682019-01-09 22:20:39 -08001828 if (isV4lScanningEnabled()) {
Usama Arifb27c8e62021-06-03 16:44:09 +01001829 result = scanVideoDirLocked(DEVICE_PATH);
Philip Quinn39b81682019-01-09 22:20:39 -08001830 if (result != OK) {
Usama Arifb27c8e62021-06-03 16:44:09 +01001831 ALOGE("scan video dir failed for %s", DEVICE_PATH);
Philip Quinn39b81682019-01-09 22:20:39 -08001832 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08001833 }
Chris Ye989bb932020-07-04 16:18:59 -07001834 if (mDevices.find(ReservedInputDeviceId::VIRTUAL_KEYBOARD_ID) == mDevices.end()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001835 createVirtualKeyboardLocked();
1836 }
1837}
1838
1839// ----------------------------------------------------------------------------
1840
Michael Wrightd02c5b62014-02-10 15:10:22 -08001841static const int32_t GAMEPAD_KEYCODES[] = {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001842 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, //
1843 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, //
1844 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, //
1845 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, //
1846 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, //
1847 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, //
Michael Wrightd02c5b62014-02-10 15:10:22 -08001848};
1849
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001850status_t EventHub::registerFdForEpoll(int fd) {
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001851 // TODO(b/121395353) - consider adding EPOLLRDHUP
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001852 struct epoll_event eventItem = {};
1853 eventItem.events = EPOLLIN | EPOLLWAKEUP;
1854 eventItem.data.fd = fd;
1855 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) {
1856 ALOGE("Could not add fd to epoll instance: %s", strerror(errno));
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07001857 return -errno;
1858 }
1859 return OK;
1860}
1861
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001862status_t EventHub::unregisterFdFromEpoll(int fd) {
1863 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, fd, nullptr)) {
1864 ALOGW("Could not remove fd from epoll instance: %s", strerror(errno));
1865 return -errno;
1866 }
1867 return OK;
1868}
1869
Chris Ye989bb932020-07-04 16:18:59 -07001870status_t EventHub::registerDeviceForEpollLocked(Device& device) {
1871 status_t result = registerFdForEpoll(device.fd);
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001872 if (result != OK) {
Chris Ye989bb932020-07-04 16:18:59 -07001873 ALOGE("Could not add input device fd to epoll for device %" PRId32, device.id);
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001874 return result;
1875 }
Chris Ye989bb932020-07-04 16:18:59 -07001876 if (device.videoDevice) {
1877 registerVideoDeviceForEpollLocked(*device.videoDevice);
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001878 }
1879 return result;
1880}
1881
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001882void EventHub::registerVideoDeviceForEpollLocked(const TouchVideoDevice& videoDevice) {
1883 status_t result = registerFdForEpoll(videoDevice.getFd());
1884 if (result != OK) {
1885 ALOGE("Could not add video device %s to epoll", videoDevice.getName().c_str());
1886 }
1887}
1888
Chris Ye989bb932020-07-04 16:18:59 -07001889status_t EventHub::unregisterDeviceFromEpollLocked(Device& device) {
1890 if (device.hasValidFd()) {
1891 status_t result = unregisterFdFromEpoll(device.fd);
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001892 if (result != OK) {
Chris Ye989bb932020-07-04 16:18:59 -07001893 ALOGW("Could not remove input device fd from epoll for device %" PRId32, device.id);
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001894 return result;
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07001895 }
1896 }
Chris Ye989bb932020-07-04 16:18:59 -07001897 if (device.videoDevice) {
1898 unregisterVideoDeviceFromEpollLocked(*device.videoDevice);
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001899 }
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07001900 return OK;
1901}
1902
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001903void EventHub::unregisterVideoDeviceFromEpollLocked(const TouchVideoDevice& videoDevice) {
1904 if (videoDevice.hasValidFd()) {
1905 status_t result = unregisterFdFromEpoll(videoDevice.getFd());
1906 if (result != OK) {
1907 ALOGW("Could not remove video device fd from epoll for device: %s",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001908 videoDevice.getName().c_str());
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001909 }
1910 }
1911}
1912
Chris Yed3fef462021-03-07 17:10:08 -08001913void EventHub::reportDeviceAddedForStatisticsLocked(const InputDeviceIdentifier& identifier,
Dominik Laskowski2f01d772022-03-23 16:01:29 -07001914 ftl::Flags<InputDeviceClass> classes) {
Chris Ye657c2f02021-05-25 16:24:37 -07001915 SHA256_CTX ctx;
1916 SHA256_Init(&ctx);
1917 SHA256_Update(&ctx, reinterpret_cast<const uint8_t*>(identifier.uniqueId.c_str()),
1918 identifier.uniqueId.size());
1919 std::array<uint8_t, SHA256_DIGEST_LENGTH> digest;
1920 SHA256_Final(digest.data(), &ctx);
1921
1922 std::string obfuscatedId;
1923 for (size_t i = 0; i < OBFUSCATED_LENGTH; i++) {
1924 obfuscatedId += StringPrintf("%02x", digest[i]);
1925 }
1926
Chris Yed3fef462021-03-07 17:10:08 -08001927 android::util::stats_write(android::util::INPUTDEVICE_REGISTERED, identifier.name.c_str(),
1928 identifier.vendor, identifier.product, identifier.version,
Chris Ye657c2f02021-05-25 16:24:37 -07001929 identifier.bus, obfuscatedId.c_str(), classes.get());
Chris Yed3fef462021-03-07 17:10:08 -08001930}
1931
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001932void EventHub::openDeviceLocked(const std::string& devicePath) {
1933 // If an input device happens to register around the time when EventHub's constructor runs, it
1934 // is possible that the same input event node (for example, /dev/input/event3) will be noticed
1935 // in both 'inotify' callback and also in the 'scanDirLocked' pass. To prevent duplicate devices
1936 // from getting registered, ensure that this path is not already covered by an existing device.
1937 for (const auto& [deviceId, device] : mDevices) {
1938 if (device->path == devicePath) {
1939 return; // device was already registered
1940 }
1941 }
1942
Michael Wrightd02c5b62014-02-10 15:10:22 -08001943 char buffer[80];
1944
Chris Ye8594e192020-07-14 10:34:06 -07001945 ALOGV("Opening device: %s", devicePath.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001946
Chris Ye8594e192020-07-14 10:34:06 -07001947 int fd = open(devicePath.c_str(), O_RDWR | O_CLOEXEC | O_NONBLOCK);
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001948 if (fd < 0) {
Chris Ye8594e192020-07-14 10:34:06 -07001949 ALOGE("could not open %s, %s\n", devicePath.c_str(), strerror(errno));
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001950 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001951 }
1952
1953 InputDeviceIdentifier identifier;
1954
1955 // Get device name.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001956 if (ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) {
Chris Ye8594e192020-07-14 10:34:06 -07001957 ALOGE("Could not get device name for %s: %s", devicePath.c_str(), strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001958 } else {
1959 buffer[sizeof(buffer) - 1] = '\0';
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001960 identifier.name = buffer;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001961 }
1962
1963 // Check to see if the device is on our excluded list
1964 for (size_t i = 0; i < mExcludedDevices.size(); i++) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001965 const std::string& item = mExcludedDevices[i];
Michael Wrightd02c5b62014-02-10 15:10:22 -08001966 if (identifier.name == item) {
Chris Ye8594e192020-07-14 10:34:06 -07001967 ALOGI("ignoring event id %s driver %s\n", devicePath.c_str(), item.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001968 close(fd);
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001969 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001970 }
1971 }
1972
1973 // Get device driver version.
1974 int driverVersion;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001975 if (ioctl(fd, EVIOCGVERSION, &driverVersion)) {
Chris Ye8594e192020-07-14 10:34:06 -07001976 ALOGE("could not get driver version for %s, %s\n", devicePath.c_str(), strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001977 close(fd);
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001978 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001979 }
1980
1981 // Get device identifier.
1982 struct input_id inputId;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001983 if (ioctl(fd, EVIOCGID, &inputId)) {
Chris Ye8594e192020-07-14 10:34:06 -07001984 ALOGE("could not get device input id for %s, %s\n", devicePath.c_str(), strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001985 close(fd);
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001986 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001987 }
1988 identifier.bus = inputId.bustype;
1989 identifier.product = inputId.product;
1990 identifier.vendor = inputId.vendor;
1991 identifier.version = inputId.version;
1992
1993 // Get device physical location.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001994 if (ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) {
1995 // fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001996 } else {
1997 buffer[sizeof(buffer) - 1] = '\0';
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001998 identifier.location = buffer;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001999 }
2000
2001 // Get device unique id.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002002 if (ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) {
2003 // fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002004 } else {
2005 buffer[sizeof(buffer) - 1] = '\0';
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01002006 identifier.uniqueId = buffer;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002007 }
2008
2009 // Fill in the descriptor.
2010 assignDescriptorLocked(identifier);
2011
Michael Wrightd02c5b62014-02-10 15:10:22 -08002012 // Allocate device. (The device object takes ownership of the fd at this point.)
2013 int32_t deviceId = mNextDeviceId++;
Chris Ye989bb932020-07-04 16:18:59 -07002014 std::unique_ptr<Device> device = std::make_unique<Device>(fd, deviceId, devicePath, identifier);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002015
Chris Ye8594e192020-07-14 10:34:06 -07002016 ALOGV("add device %d: %s\n", deviceId, devicePath.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002017 ALOGV(" bus: %04x\n"
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002018 " vendor %04x\n"
2019 " product %04x\n"
2020 " version %04x\n",
2021 identifier.bus, identifier.vendor, identifier.product, identifier.version);
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01002022 ALOGV(" name: \"%s\"\n", identifier.name.c_str());
2023 ALOGV(" location: \"%s\"\n", identifier.location.c_str());
2024 ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.c_str());
2025 ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.c_str());
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002026 ALOGV(" driver: v%d.%d.%d\n", driverVersion >> 16, (driverVersion >> 8) & 0xff,
2027 driverVersion & 0xff);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002028
2029 // Load the configuration file for the device.
Chris Ye989bb932020-07-04 16:18:59 -07002030 device->loadConfigurationLocked();
Michael Wrightd02c5b62014-02-10 15:10:22 -08002031
Chris Yee2b1e5c2021-03-10 22:45:12 -08002032 bool hasBattery = false;
2033 bool hasLights = false;
2034 // Check the sysfs root path
2035 std::optional<std::filesystem::path> sysfsRootPath = getSysfsRootPath(devicePath.c_str());
2036 if (sysfsRootPath.has_value()) {
Chris Ye1dd2e5c2021-04-04 23:12:41 -07002037 std::shared_ptr<AssociatedDevice> associatedDevice;
2038 for (const auto& [id, dev] : mDevices) {
2039 if (device->identifier.descriptor == dev->identifier.descriptor &&
2040 !dev->associatedDevice) {
2041 associatedDevice = dev->associatedDevice;
2042 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08002043 }
Chris Ye1dd2e5c2021-04-04 23:12:41 -07002044 if (!associatedDevice) {
2045 associatedDevice = std::make_shared<AssociatedDevice>(sysfsRootPath.value());
2046 }
2047 hasBattery = associatedDevice->configureBatteryLocked();
2048 hasLights = associatedDevice->configureLightsLocked();
Chris Yee2b1e5c2021-03-10 22:45:12 -08002049
Chris Ye1dd2e5c2021-04-04 23:12:41 -07002050 device->associatedDevice = associatedDevice;
Chris Yee2b1e5c2021-03-10 22:45:12 -08002051 }
Chris Ye3fdbfef2021-01-06 18:45:18 -08002052
Michael Wrightd02c5b62014-02-10 15:10:22 -08002053 // Figure out the kinds of events the device reports.
Chris Ye66fbac32020-07-06 20:36:43 -07002054 device->readDeviceBitMask(EVIOCGBIT(EV_KEY, 0), device->keyBitmask);
2055 device->readDeviceBitMask(EVIOCGBIT(EV_ABS, 0), device->absBitmask);
2056 device->readDeviceBitMask(EVIOCGBIT(EV_REL, 0), device->relBitmask);
2057 device->readDeviceBitMask(EVIOCGBIT(EV_SW, 0), device->swBitmask);
2058 device->readDeviceBitMask(EVIOCGBIT(EV_LED, 0), device->ledBitmask);
2059 device->readDeviceBitMask(EVIOCGBIT(EV_FF, 0), device->ffBitmask);
Chris Yef59a2f42020-10-16 12:55:26 -07002060 device->readDeviceBitMask(EVIOCGBIT(EV_MSC, 0), device->mscBitmask);
Chris Ye66fbac32020-07-06 20:36:43 -07002061 device->readDeviceBitMask(EVIOCGPROP(0), device->propBitmask);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002062
2063 // See if this is a keyboard. Ignore everything in the button range except for
2064 // joystick and gamepad buttons which are handled like keyboards for the most part.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002065 bool haveKeyboardKeys =
Chris Ye66fbac32020-07-06 20:36:43 -07002066 device->keyBitmask.any(0, BTN_MISC) || device->keyBitmask.any(BTN_WHEEL, KEY_MAX + 1);
2067 bool haveGamepadButtons = device->keyBitmask.any(BTN_MISC, BTN_MOUSE) ||
2068 device->keyBitmask.any(BTN_JOYSTICK, BTN_DIGI);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002069 if (haveKeyboardKeys || haveGamepadButtons) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002070 device->classes |= InputDeviceClass::KEYBOARD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002071 }
2072
2073 // See if this is a cursor device such as a trackball or mouse.
Chris Ye66fbac32020-07-06 20:36:43 -07002074 if (device->keyBitmask.test(BTN_MOUSE) && device->relBitmask.test(REL_X) &&
2075 device->relBitmask.test(REL_Y)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002076 device->classes |= InputDeviceClass::CURSOR;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002077 }
2078
Prashant Malani1941ff52015-08-11 18:29:28 -07002079 // See if this is a rotary encoder type device.
2080 String8 deviceType = String8();
2081 if (device->configuration &&
2082 device->configuration->tryGetProperty(String8("device.type"), deviceType)) {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002083 if (!deviceType.compare(String8("rotaryEncoder"))) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002084 device->classes |= InputDeviceClass::ROTARY_ENCODER;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002085 }
Prashant Malani1941ff52015-08-11 18:29:28 -07002086 }
2087
Michael Wrightd02c5b62014-02-10 15:10:22 -08002088 // See if this is a touch pad.
2089 // Is this a new modern multi-touch driver?
Chris Ye66fbac32020-07-06 20:36:43 -07002090 if (device->absBitmask.test(ABS_MT_POSITION_X) && device->absBitmask.test(ABS_MT_POSITION_Y)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002091 // Some joysticks such as the PS3 controller report axes that conflict
2092 // with the ABS_MT range. Try to confirm that the device really is
2093 // a touch screen.
Chris Ye66fbac32020-07-06 20:36:43 -07002094 if (device->keyBitmask.test(BTN_TOUCH) || !haveGamepadButtons) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002095 device->classes |= (InputDeviceClass::TOUCH | InputDeviceClass::TOUCH_MT);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002096 }
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002097 // Is this an old style single-touch driver?
Chris Ye66fbac32020-07-06 20:36:43 -07002098 } else if (device->keyBitmask.test(BTN_TOUCH) && device->absBitmask.test(ABS_X) &&
2099 device->absBitmask.test(ABS_Y)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002100 device->classes |= InputDeviceClass::TOUCH;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002101 // Is this a BT stylus?
Chris Ye66fbac32020-07-06 20:36:43 -07002102 } else if ((device->absBitmask.test(ABS_PRESSURE) || device->keyBitmask.test(BTN_TOUCH)) &&
2103 !device->absBitmask.test(ABS_X) && !device->absBitmask.test(ABS_Y)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002104 device->classes |= InputDeviceClass::EXTERNAL_STYLUS;
Michael Wright842500e2015-03-13 17:32:02 -07002105 // Keyboard will try to claim some of the buttons but we really want to reserve those so we
2106 // can fuse it with the touch screen data, so just take them back. Note this means an
2107 // external stylus cannot also be a keyboard device.
Chris Ye1b0c7342020-07-28 21:57:03 -07002108 device->classes &= ~InputDeviceClass::KEYBOARD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002109 }
2110
2111 // See if this device is a joystick.
2112 // Assumes that joysticks always have gamepad buttons in order to distinguish them
2113 // from other devices such as accelerometers that also have absolute axes.
2114 if (haveGamepadButtons) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002115 auto assumedClasses = device->classes | InputDeviceClass::JOYSTICK;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002116 for (int i = 0; i <= ABS_MAX; i++) {
Chris Ye66fbac32020-07-06 20:36:43 -07002117 if (device->absBitmask.test(i) &&
Chris Ye1b0c7342020-07-28 21:57:03 -07002118 (getAbsAxisUsage(i, assumedClasses).test(InputDeviceClass::JOYSTICK))) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002119 device->classes = assumedClasses;
2120 break;
2121 }
2122 }
2123 }
2124
Chris Yef59a2f42020-10-16 12:55:26 -07002125 // Check whether this device is an accelerometer.
2126 if (device->propBitmask.test(INPUT_PROP_ACCELEROMETER)) {
2127 device->classes |= InputDeviceClass::SENSOR;
2128 }
2129
Michael Wrightd02c5b62014-02-10 15:10:22 -08002130 // Check whether this device has switches.
2131 for (int i = 0; i <= SW_MAX; i++) {
Chris Ye66fbac32020-07-06 20:36:43 -07002132 if (device->swBitmask.test(i)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002133 device->classes |= InputDeviceClass::SWITCH;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002134 break;
2135 }
2136 }
2137
2138 // Check whether this device supports the vibrator.
Chris Ye66fbac32020-07-06 20:36:43 -07002139 if (device->ffBitmask.test(FF_RUMBLE)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002140 device->classes |= InputDeviceClass::VIBRATOR;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002141 }
2142
2143 // Configure virtual keys.
Chris Ye1b0c7342020-07-28 21:57:03 -07002144 if ((device->classes.test(InputDeviceClass::TOUCH))) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002145 // Load the virtual keys for the touch screen, if any.
2146 // We do this now so that we can make sure to load the keymap if necessary.
Chris Ye989bb932020-07-04 16:18:59 -07002147 bool success = device->loadVirtualKeyMapLocked();
Siarhei Vishniakou3e78dec2019-02-20 16:21:46 -06002148 if (success) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002149 device->classes |= InputDeviceClass::KEYBOARD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002150 }
2151 }
2152
2153 // Load the key map.
Chris Yef59a2f42020-10-16 12:55:26 -07002154 // We need to do this for joysticks too because the key layout may specify axes, and for
2155 // sensor as well because the key layout may specify the axes to sensor data mapping.
Michael Wrightd02c5b62014-02-10 15:10:22 -08002156 status_t keyMapStatus = NAME_NOT_FOUND;
Chris Yef59a2f42020-10-16 12:55:26 -07002157 if (device->classes.any(InputDeviceClass::KEYBOARD | InputDeviceClass::JOYSTICK |
2158 InputDeviceClass::SENSOR)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002159 // Load the keymap for the device.
Chris Ye989bb932020-07-04 16:18:59 -07002160 keyMapStatus = device->loadKeyMapLocked();
Michael Wrightd02c5b62014-02-10 15:10:22 -08002161 }
2162
2163 // Configure the keyboard, gamepad or virtual keyboard.
Chris Ye1b0c7342020-07-28 21:57:03 -07002164 if (device->classes.test(InputDeviceClass::KEYBOARD)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002165 // Register the keyboard as a built-in keyboard if it is eligible.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002166 if (!keyMapStatus && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD &&
Siarhei Vishniakoud549b252020-08-11 11:25:26 -05002167 isEligibleBuiltInKeyboard(device->identifier, device->configuration.get(),
2168 &device->keyMap)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002169 mBuiltInKeyboardId = device->id;
2170 }
2171
2172 // 'Q' key support = cheap test of whether this is an alpha-capable kbd
Chris Ye989bb932020-07-04 16:18:59 -07002173 if (device->hasKeycodeLocked(AKEYCODE_Q)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002174 device->classes |= InputDeviceClass::ALPHAKEY;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002175 }
2176
2177 // See if this device has a DPAD.
Chris Ye989bb932020-07-04 16:18:59 -07002178 if (device->hasKeycodeLocked(AKEYCODE_DPAD_UP) &&
2179 device->hasKeycodeLocked(AKEYCODE_DPAD_DOWN) &&
2180 device->hasKeycodeLocked(AKEYCODE_DPAD_LEFT) &&
2181 device->hasKeycodeLocked(AKEYCODE_DPAD_RIGHT) &&
2182 device->hasKeycodeLocked(AKEYCODE_DPAD_CENTER)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002183 device->classes |= InputDeviceClass::DPAD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002184 }
2185
2186 // See if this device has a gamepad.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002187 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES) / sizeof(GAMEPAD_KEYCODES[0]); i++) {
Chris Ye989bb932020-07-04 16:18:59 -07002188 if (device->hasKeycodeLocked(GAMEPAD_KEYCODES[i])) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002189 device->classes |= InputDeviceClass::GAMEPAD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002190 break;
2191 }
2192 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002193 }
2194
2195 // If the device isn't recognized as something we handle, don't monitor it.
Dominik Laskowski2f01d772022-03-23 16:01:29 -07002196 if (device->classes == ftl::Flags<InputDeviceClass>(0)) {
Chris Ye8594e192020-07-14 10:34:06 -07002197 ALOGV("Dropping device: id=%d, path='%s', name='%s'", deviceId, devicePath.c_str(),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002198 device->identifier.name.c_str());
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00002199 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002200 }
2201
Chris Ye3fdbfef2021-01-06 18:45:18 -08002202 // Classify InputDeviceClass::BATTERY.
2203 if (hasBattery) {
2204 device->classes |= InputDeviceClass::BATTERY;
2205 }
Kim Low03ea0352020-11-06 12:45:07 -08002206
Chris Ye3fdbfef2021-01-06 18:45:18 -08002207 // Classify InputDeviceClass::LIGHT.
2208 if (hasLights) {
2209 device->classes |= InputDeviceClass::LIGHT;
Kim Low03ea0352020-11-06 12:45:07 -08002210 }
2211
Tim Kilbourn063ff532015-04-08 10:26:18 -07002212 // Determine whether the device has a mic.
Chris Ye989bb932020-07-04 16:18:59 -07002213 if (device->deviceHasMicLocked()) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002214 device->classes |= InputDeviceClass::MIC;
Tim Kilbourn063ff532015-04-08 10:26:18 -07002215 }
2216
Michael Wrightd02c5b62014-02-10 15:10:22 -08002217 // Determine whether the device is external or internal.
Chris Ye989bb932020-07-04 16:18:59 -07002218 if (device->isExternalDeviceLocked()) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002219 device->classes |= InputDeviceClass::EXTERNAL;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002220 }
2221
Chris Ye1b0c7342020-07-28 21:57:03 -07002222 if (device->classes.any(InputDeviceClass::JOYSTICK | InputDeviceClass::DPAD) &&
2223 device->classes.test(InputDeviceClass::GAMEPAD)) {
Chris Ye989bb932020-07-04 16:18:59 -07002224 device->controllerNumber = getNextControllerNumberLocked(device->identifier.name);
2225 device->setLedForControllerLocked();
Michael Wrightd02c5b62014-02-10 15:10:22 -08002226 }
2227
Chris Ye989bb932020-07-04 16:18:59 -07002228 if (registerDeviceForEpollLocked(*device) != OK) {
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00002229 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002230 }
2231
Chris Ye989bb932020-07-04 16:18:59 -07002232 device->configureFd();
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002233
Chris Ye1b0c7342020-07-28 21:57:03 -07002234 ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=%s, "
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002235 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, ",
Chris Ye1b0c7342020-07-28 21:57:03 -07002236 deviceId, fd, devicePath.c_str(), device->identifier.name.c_str(),
2237 device->classes.string().c_str(), device->configurationFile.c_str(),
2238 device->keyMap.keyLayoutFile.c_str(), device->keyMap.keyCharacterMapFile.c_str(),
2239 toString(mBuiltInKeyboardId == deviceId));
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002240
Chris Ye989bb932020-07-04 16:18:59 -07002241 addDeviceLocked(std::move(device));
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002242}
2243
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002244void EventHub::openVideoDeviceLocked(const std::string& devicePath) {
2245 std::unique_ptr<TouchVideoDevice> videoDevice = TouchVideoDevice::create(devicePath);
2246 if (!videoDevice) {
2247 ALOGE("Could not create touch video device for %s. Ignoring", devicePath.c_str());
2248 return;
2249 }
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002250 // Transfer ownership of this video device to a matching input device
Chris Ye989bb932020-07-04 16:18:59 -07002251 for (const auto& [id, device] : mDevices) {
Chris Yed3fef462021-03-07 17:10:08 -08002252 if (tryAddVideoDeviceLocked(*device, videoDevice)) {
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05002253 return; // 'device' now owns 'videoDevice'
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002254 }
2255 }
2256
2257 // Couldn't find a matching input device, so just add it to a temporary holding queue.
2258 // A matching input device may appear later.
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002259 ALOGI("Adding video device %s to list of unattached video devices",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002260 videoDevice->getName().c_str());
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002261 mUnattachedVideoDevices.push_back(std::move(videoDevice));
2262}
2263
Chris Yed3fef462021-03-07 17:10:08 -08002264bool EventHub::tryAddVideoDeviceLocked(EventHub::Device& device,
2265 std::unique_ptr<TouchVideoDevice>& videoDevice) {
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05002266 if (videoDevice->getName() != device.identifier.name) {
2267 return false;
2268 }
2269 device.videoDevice = std::move(videoDevice);
2270 if (device.enabled) {
2271 registerVideoDeviceForEpollLocked(*device.videoDevice);
2272 }
2273 return true;
2274}
2275
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002276bool EventHub::isDeviceEnabled(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00002277 std::scoped_lock _l(mLock);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002278 Device* device = getDeviceLocked(deviceId);
Yi Kong9b14ac62018-07-17 13:48:38 -07002279 if (device == nullptr) {
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002280 ALOGE("Invalid device id=%" PRId32 " provided to %s", deviceId, __func__);
2281 return false;
2282 }
2283 return device->enabled;
2284}
Michael Wrightd02c5b62014-02-10 15:10:22 -08002285
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002286status_t EventHub::enableDevice(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00002287 std::scoped_lock _l(mLock);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002288 Device* device = getDeviceLocked(deviceId);
Yi Kong9b14ac62018-07-17 13:48:38 -07002289 if (device == nullptr) {
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002290 ALOGE("Invalid device id=%" PRId32 " provided to %s", deviceId, __func__);
2291 return BAD_VALUE;
2292 }
2293 if (device->enabled) {
2294 ALOGW("Duplicate call to %s, input device %" PRId32 " already enabled", __func__, deviceId);
2295 return OK;
2296 }
2297 status_t result = device->enable();
2298 if (result != OK) {
2299 ALOGE("Failed to enable device %" PRId32, deviceId);
2300 return result;
2301 }
2302
Chris Ye989bb932020-07-04 16:18:59 -07002303 device->configureFd();
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002304
Chris Ye989bb932020-07-04 16:18:59 -07002305 return registerDeviceForEpollLocked(*device);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002306}
2307
2308status_t EventHub::disableDevice(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00002309 std::scoped_lock _l(mLock);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002310 Device* device = getDeviceLocked(deviceId);
Yi Kong9b14ac62018-07-17 13:48:38 -07002311 if (device == nullptr) {
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002312 ALOGE("Invalid device id=%" PRId32 " provided to %s", deviceId, __func__);
2313 return BAD_VALUE;
2314 }
2315 if (!device->enabled) {
2316 ALOGW("Duplicate call to %s, input device already disabled", __func__);
2317 return OK;
2318 }
Chris Ye989bb932020-07-04 16:18:59 -07002319 unregisterDeviceFromEpollLocked(*device);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002320 return device->disable();
Michael Wrightd02c5b62014-02-10 15:10:22 -08002321}
2322
2323void EventHub::createVirtualKeyboardLocked() {
2324 InputDeviceIdentifier identifier;
2325 identifier.name = "Virtual";
2326 identifier.uniqueId = "<virtual>";
2327 assignDescriptorLocked(identifier);
2328
Chris Ye989bb932020-07-04 16:18:59 -07002329 std::unique_ptr<Device> device =
2330 std::make_unique<Device>(-1, ReservedInputDeviceId::VIRTUAL_KEYBOARD_ID, "<virtual>",
2331 identifier);
Chris Ye1b0c7342020-07-28 21:57:03 -07002332 device->classes = InputDeviceClass::KEYBOARD | InputDeviceClass::ALPHAKEY |
2333 InputDeviceClass::DPAD | InputDeviceClass::VIRTUAL;
Chris Ye989bb932020-07-04 16:18:59 -07002334 device->loadKeyMapLocked();
2335 addDeviceLocked(std::move(device));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002336}
2337
Chris Ye989bb932020-07-04 16:18:59 -07002338void EventHub::addDeviceLocked(std::unique_ptr<Device> device) {
Chris Yed3fef462021-03-07 17:10:08 -08002339 reportDeviceAddedForStatisticsLocked(device->identifier, device->classes);
Chris Ye989bb932020-07-04 16:18:59 -07002340 mOpeningDevices.push_back(std::move(device));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002341}
2342
Chris Ye989bb932020-07-04 16:18:59 -07002343int32_t EventHub::getNextControllerNumberLocked(const std::string& name) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002344 if (mControllerNumbers.isFull()) {
2345 ALOGI("Maximum number of controllers reached, assigning controller number 0 to device %s",
Chris Ye989bb932020-07-04 16:18:59 -07002346 name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002347 return 0;
2348 }
2349 // Since the controller number 0 is reserved for non-controllers, translate all numbers up by
2350 // one
2351 return static_cast<int32_t>(mControllerNumbers.markFirstUnmarkedBit() + 1);
2352}
2353
Chris Ye989bb932020-07-04 16:18:59 -07002354void EventHub::releaseControllerNumberLocked(int32_t num) {
2355 if (num > 0) {
2356 mControllerNumbers.clearBit(static_cast<uint32_t>(num - 1));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002357 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002358}
2359
Chris Ye8594e192020-07-14 10:34:06 -07002360void EventHub::closeDeviceByPathLocked(const std::string& devicePath) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002361 Device* device = getDeviceByPathLocked(devicePath);
Chris Ye989bb932020-07-04 16:18:59 -07002362 if (device != nullptr) {
2363 closeDeviceLocked(*device);
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002364 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002365 }
Chris Ye8594e192020-07-14 10:34:06 -07002366 ALOGV("Remove device: %s not found, device may already have been removed.", devicePath.c_str());
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002367}
2368
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002369/**
2370 * Find the video device by filename, and close it.
2371 * The video device is closed by path during an inotify event, where we don't have the
2372 * additional context about the video device fd, or the associated input device.
2373 */
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002374void EventHub::closeVideoDeviceByPathLocked(const std::string& devicePath) {
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002375 // A video device may be owned by an existing input device, or it may be stored in
2376 // the mUnattachedVideoDevices queue. Check both locations.
Chris Ye989bb932020-07-04 16:18:59 -07002377 for (const auto& [id, device] : mDevices) {
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002378 if (device->videoDevice && device->videoDevice->getPath() == devicePath) {
Siarhei Vishniakou12598682018-11-02 17:19:19 -07002379 unregisterVideoDeviceFromEpollLocked(*device->videoDevice);
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002380 device->videoDevice = nullptr;
2381 return;
2382 }
2383 }
Siarhei Vishniakouf47c339e2021-12-30 11:22:26 -08002384 std::erase_if(mUnattachedVideoDevices,
2385 [&devicePath](const std::unique_ptr<TouchVideoDevice>& videoDevice) {
2386 return videoDevice->getPath() == devicePath;
2387 });
Michael Wrightd02c5b62014-02-10 15:10:22 -08002388}
2389
2390void EventHub::closeAllDevicesLocked() {
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002391 mUnattachedVideoDevices.clear();
Siarhei Vishniakoud549b252020-08-11 11:25:26 -05002392 while (!mDevices.empty()) {
2393 closeDeviceLocked(*(mDevices.begin()->second));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002394 }
2395}
2396
Chris Ye989bb932020-07-04 16:18:59 -07002397void EventHub::closeDeviceLocked(Device& device) {
2398 ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=%s", device.path.c_str(),
2399 device.identifier.name.c_str(), device.id, device.fd, device.classes.string().c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002400
Chris Ye989bb932020-07-04 16:18:59 -07002401 if (device.id == mBuiltInKeyboardId) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002402 ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this",
Chris Ye989bb932020-07-04 16:18:59 -07002403 device.path.c_str(), mBuiltInKeyboardId);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002404 mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD;
2405 }
2406
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002407 unregisterDeviceFromEpollLocked(device);
Chris Ye989bb932020-07-04 16:18:59 -07002408 if (device.videoDevice) {
Siarhei Vishniakou12598682018-11-02 17:19:19 -07002409 // This must be done after the video device is removed from epoll
Chris Ye989bb932020-07-04 16:18:59 -07002410 mUnattachedVideoDevices.push_back(std::move(device.videoDevice));
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002411 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002412
Chris Ye989bb932020-07-04 16:18:59 -07002413 releaseControllerNumberLocked(device.controllerNumber);
Siarhei Vishniakoud549b252020-08-11 11:25:26 -05002414 device.controllerNumber = 0;
Chris Ye989bb932020-07-04 16:18:59 -07002415 device.close();
Chris Ye989bb932020-07-04 16:18:59 -07002416 mClosingDevices.push_back(std::move(mDevices[device.id]));
Siarhei Vishniakoud549b252020-08-11 11:25:26 -05002417
Chris Ye989bb932020-07-04 16:18:59 -07002418 mDevices.erase(device.id);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002419}
2420
2421status_t EventHub::readNotifyLocked() {
2422 int res;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002423 char event_buf[512];
2424 int event_size;
2425 int event_pos = 0;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002426 struct inotify_event* event;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002427
2428 ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd);
2429 res = read(mINotifyFd, event_buf, sizeof(event_buf));
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002430 if (res < (int)sizeof(*event)) {
2431 if (errno == EINTR) return 0;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002432 ALOGW("could not get event, %s\n", strerror(errno));
2433 return -1;
2434 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002435
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002436 while (res >= (int)sizeof(*event)) {
2437 event = (struct inotify_event*)(event_buf + event_pos);
2438 if (event->len) {
Usama Arifb27c8e62021-06-03 16:44:09 +01002439 if (event->wd == mDeviceInputWd) {
2440 std::string filename = std::string(DEVICE_INPUT_PATH) + "/" + event->name;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002441 if (event->mask & IN_CREATE) {
Chris Ye8594e192020-07-14 10:34:06 -07002442 openDeviceLocked(filename);
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002443 } else {
2444 ALOGI("Removing device '%s' due to inotify event\n", filename.c_str());
Chris Ye8594e192020-07-14 10:34:06 -07002445 closeDeviceByPathLocked(filename);
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002446 }
Usama Arifb27c8e62021-06-03 16:44:09 +01002447 } else if (event->wd == mDeviceWd) {
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002448 if (isV4lTouchNode(event->name)) {
Usama Arifb27c8e62021-06-03 16:44:09 +01002449 std::string filename = std::string(DEVICE_PATH) + "/" + event->name;
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002450 if (event->mask & IN_CREATE) {
2451 openVideoDeviceLocked(filename);
2452 } else {
2453 ALOGI("Removing video device '%s' due to inotify event", filename.c_str());
2454 closeVideoDeviceByPathLocked(filename);
2455 }
Usama Arifb27c8e62021-06-03 16:44:09 +01002456 } else if (strcmp(event->name, "input") == 0 && event->mask & IN_CREATE) {
2457 addDeviceInputInotify();
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002458 }
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002459 } else {
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002460 LOG_ALWAYS_FATAL("Unexpected inotify event, wd = %i", event->wd);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002461 }
2462 }
2463 event_size = sizeof(*event) + event->len;
2464 res -= event_size;
2465 event_pos += event_size;
2466 }
2467 return 0;
2468}
2469
Chris Ye8594e192020-07-14 10:34:06 -07002470status_t EventHub::scanDirLocked(const std::string& dirname) {
2471 for (const auto& entry : std::filesystem::directory_iterator(dirname)) {
2472 openDeviceLocked(entry.path());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002473 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002474 return 0;
2475}
2476
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002477/**
2478 * Look for all dirname/v4l-touch* devices, and open them.
2479 */
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002480status_t EventHub::scanVideoDirLocked(const std::string& dirname) {
Chris Ye8594e192020-07-14 10:34:06 -07002481 for (const auto& entry : std::filesystem::directory_iterator(dirname)) {
2482 if (isV4lTouchNode(entry.path())) {
2483 ALOGI("Found touch video device %s", entry.path().c_str());
2484 openVideoDeviceLocked(entry.path());
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002485 }
2486 }
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002487 return OK;
2488}
2489
Michael Wrightd02c5b62014-02-10 15:10:22 -08002490void EventHub::requestReopenDevices() {
2491 ALOGV("requestReopenDevices() called");
2492
Chris Ye87143712020-11-10 05:05:58 +00002493 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002494 mNeedToReopenDevices = true;
2495}
2496
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002497void EventHub::dump(std::string& dump) {
2498 dump += "Event Hub State:\n";
Michael Wrightd02c5b62014-02-10 15:10:22 -08002499
2500 { // acquire lock
Chris Ye87143712020-11-10 05:05:58 +00002501 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002502
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002503 dump += StringPrintf(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002504
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002505 dump += INDENT "Devices:\n";
Michael Wrightd02c5b62014-02-10 15:10:22 -08002506
Chris Ye989bb932020-07-04 16:18:59 -07002507 for (const auto& [id, device] : mDevices) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002508 if (mBuiltInKeyboardId == device->id) {
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002509 dump += StringPrintf(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002510 device->id, device->identifier.name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002511 } else {
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002512 dump += StringPrintf(INDENT2 "%d: %s\n", device->id,
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002513 device->identifier.name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002514 }
Chris Ye1b0c7342020-07-28 21:57:03 -07002515 dump += StringPrintf(INDENT3 "Classes: %s\n", device->classes.string().c_str());
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01002516 dump += StringPrintf(INDENT3 "Path: %s\n", device->path.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002517 dump += StringPrintf(INDENT3 "Enabled: %s\n", toString(device->enabled));
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01002518 dump += StringPrintf(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.c_str());
2519 dump += StringPrintf(INDENT3 "Location: %s\n", device->identifier.location.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002520 dump += StringPrintf(INDENT3 "ControllerNumber: %d\n", device->controllerNumber);
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01002521 dump += StringPrintf(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002522 dump += StringPrintf(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, "
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002523 "product=0x%04x, version=0x%04x\n",
2524 device->identifier.bus, device->identifier.vendor,
2525 device->identifier.product, device->identifier.version);
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002526 dump += StringPrintf(INDENT3 "KeyLayoutFile: %s\n",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002527 device->keyMap.keyLayoutFile.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002528 dump += StringPrintf(INDENT3 "KeyCharacterMapFile: %s\n",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002529 device->keyMap.keyCharacterMapFile.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002530 dump += StringPrintf(INDENT3 "ConfigurationFile: %s\n",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002531 device->configurationFile.c_str());
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002532 dump += INDENT3 "VideoDevice: ";
2533 if (device->videoDevice) {
2534 dump += device->videoDevice->dump() + "\n";
2535 } else {
2536 dump += "<none>\n";
2537 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002538 }
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002539
2540 dump += INDENT "Unattached video devices:\n";
2541 for (const std::unique_ptr<TouchVideoDevice>& videoDevice : mUnattachedVideoDevices) {
2542 dump += INDENT2 + videoDevice->dump() + "\n";
2543 }
2544 if (mUnattachedVideoDevices.empty()) {
2545 dump += INDENT2 "<none>\n";
2546 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002547 } // release lock
2548}
2549
2550void EventHub::monitor() {
2551 // Acquire and release the lock to ensure that the event hub has not deadlocked.
Chris Ye1c2e0892020-11-30 21:41:44 -08002552 std::unique_lock<std::mutex> lock(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002553}
2554
Michael Wrightd02c5b62014-02-10 15:10:22 -08002555}; // namespace android