blob: 045d24cac637f4303b66ce0bcebcae00075c833c [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>
Chris Ye8594e192020-07-14 10:34:06 -070043#include <input/KeyCharacterMap.h>
44#include <input/KeyLayoutMap.h>
45#include <input/VirtualKeyMap.h>
Dan Albert677d87e2014-06-16 17:31:28 -070046#include <openssl/sha.h>
Chris Yed3fef462021-03-07 17:10:08 -080047#include <statslog.h>
Prabir Pradhanda7c00c2019-08-29 14:12:42 -070048#include <utils/Errors.h>
Michael Wrightd02c5b62014-02-10 15:10:22 -080049#include <utils/Log.h>
50#include <utils/Timers.h>
Michael Wrightd02c5b62014-02-10 15:10:22 -080051
Chris Ye8594e192020-07-14 10:34:06 -070052#include <filesystem>
Chris Ye3fdbfef2021-01-06 18:45:18 -080053#include <regex>
Chris Ye8594e192020-07-14 10:34:06 -070054
55#include "EventHub.h"
Michael Wrightd02c5b62014-02-10 15:10:22 -080056
Michael Wrightd02c5b62014-02-10 15:10:22 -080057#define INDENT " "
58#define INDENT2 " "
59#define INDENT3 " "
60
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -080061using android::base::StringPrintf;
Chris Ye1b0c7342020-07-28 21:57:03 -070062using namespace android::flag_operators;
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -080063
Michael Wrightd02c5b62014-02-10 15:10:22 -080064namespace android {
65
Prabir Pradhanda7c00c2019-08-29 14:12:42 -070066static const char* DEVICE_PATH = "/dev/input";
Siarhei Vishniakou951f3622018-12-12 19:45:42 -080067// v4l2 devices go directly into /dev
Prabir Pradhanda7c00c2019-08-29 14:12:42 -070068static const char* VIDEO_DEVICE_PATH = "/dev";
Michael Wrightd02c5b62014-02-10 15:10:22 -080069
Chris Ye87143712020-11-10 05:05:58 +000070static constexpr int32_t FF_STRONG_MAGNITUDE_CHANNEL_IDX = 0;
71static constexpr int32_t FF_WEAK_MAGNITUDE_CHANNEL_IDX = 1;
Chris Ye6393a262020-08-04 19:41:36 -070072
Chris Yee2b1e5c2021-03-10 22:45:12 -080073// Mapping for input battery class node IDs lookup.
74// https://www.kernel.org/doc/Documentation/power/power_supply_class.txt
75static const std::unordered_map<std::string, InputBatteryClass> BATTERY_CLASSES =
76 {{"capacity", InputBatteryClass::CAPACITY},
77 {"capacity_level", InputBatteryClass::CAPACITY_LEVEL},
78 {"status", InputBatteryClass::STATUS}};
79
80// Mapping for input battery class node names lookup.
81// https://www.kernel.org/doc/Documentation/power/power_supply_class.txt
82static const std::unordered_map<InputBatteryClass, std::string> BATTERY_NODES =
83 {{InputBatteryClass::CAPACITY, "capacity"},
84 {InputBatteryClass::CAPACITY_LEVEL, "capacity_level"},
85 {InputBatteryClass::STATUS, "status"}};
86
Kim Low03ea0352020-11-06 12:45:07 -080087// must be kept in sync with definitions in kernel /drivers/power/supply/power_supply_sysfs.c
88static const std::unordered_map<std::string, int32_t> BATTERY_STATUS =
89 {{"Unknown", BATTERY_STATUS_UNKNOWN},
90 {"Charging", BATTERY_STATUS_CHARGING},
91 {"Discharging", BATTERY_STATUS_DISCHARGING},
92 {"Not charging", BATTERY_STATUS_NOT_CHARGING},
93 {"Full", BATTERY_STATUS_FULL}};
94
95// Mapping taken from
96// https://gitlab.freedesktop.org/upower/upower/-/blob/master/src/linux/up-device-supply.c#L484
97static const std::unordered_map<std::string, int32_t> BATTERY_LEVEL = {{"Critical", 5},
98 {"Low", 10},
99 {"Normal", 55},
100 {"High", 70},
101 {"Full", 100},
102 {"Unknown", 50}};
103
Chris Ye3fdbfef2021-01-06 18:45:18 -0800104// Mapping for input led class node names lookup.
105// https://www.kernel.org/doc/html/latest/leds/leds-class.html
106static const std::unordered_map<std::string, InputLightClass> LIGHT_CLASSES =
107 {{"red", InputLightClass::RED},
108 {"green", InputLightClass::GREEN},
109 {"blue", InputLightClass::BLUE},
110 {"global", InputLightClass::GLOBAL},
111 {"brightness", InputLightClass::BRIGHTNESS},
112 {"multi_index", InputLightClass::MULTI_INDEX},
113 {"multi_intensity", InputLightClass::MULTI_INTENSITY},
114 {"max_brightness", InputLightClass::MAX_BRIGHTNESS}};
115
116// Mapping for input multicolor led class node names.
117// https://www.kernel.org/doc/html/latest/leds/leds-class-multicolor.html
118static const std::unordered_map<InputLightClass, std::string> LIGHT_NODES =
119 {{InputLightClass::BRIGHTNESS, "brightness"},
120 {InputLightClass::MULTI_INDEX, "multi_index"},
121 {InputLightClass::MULTI_INTENSITY, "multi_intensity"}};
122
123// Mapping for light color name and the light color
124const std::unordered_map<std::string, LightColor> LIGHT_COLORS = {{"red", LightColor::RED},
125 {"green", LightColor::GREEN},
126 {"blue", LightColor::BLUE}};
127
Michael Wrightd02c5b62014-02-10 15:10:22 -0800128static inline const char* toString(bool value) {
129 return value ? "true" : "false";
130}
131
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100132static std::string sha1(const std::string& in) {
Dan Albert677d87e2014-06-16 17:31:28 -0700133 SHA_CTX ctx;
134 SHA1_Init(&ctx);
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100135 SHA1_Update(&ctx, reinterpret_cast<const u_char*>(in.c_str()), in.size());
Dan Albert677d87e2014-06-16 17:31:28 -0700136 u_char digest[SHA_DIGEST_LENGTH];
137 SHA1_Final(digest, &ctx);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800138
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100139 std::string out;
Dan Albert677d87e2014-06-16 17:31:28 -0700140 for (size_t i = 0; i < SHA_DIGEST_LENGTH; i++) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100141 out += StringPrintf("%02x", digest[i]);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800142 }
143 return out;
144}
145
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800146/**
147 * Return true if name matches "v4l-touch*"
148 */
Chris Ye8594e192020-07-14 10:34:06 -0700149static bool isV4lTouchNode(std::string name) {
150 return name.find("v4l-touch") != std::string::npos;
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800151}
152
Philip Quinn39b81682019-01-09 22:20:39 -0800153/**
154 * Returns true if V4L devices should be scanned.
155 *
156 * The system property ro.input.video_enabled can be used to control whether
157 * EventHub scans and opens V4L devices. As V4L does not support multiple
158 * clients, EventHub effectively blocks access to these devices when it opens
Siarhei Vishniakou29f88492019-04-05 14:11:43 -0700159 * them.
160 *
161 * Setting this to "false" would prevent any video devices from being discovered and
162 * associated with input devices.
163 *
164 * This property can be used as follows:
165 * 1. To turn off features that are dependent on video device presence.
166 * 2. During testing and development, to allow other clients to read video devices
167 * directly from /dev.
Philip Quinn39b81682019-01-09 22:20:39 -0800168 */
169static bool isV4lScanningEnabled() {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700170 return property_get_bool("ro.input.video_enabled", true /* default_value */);
Philip Quinn39b81682019-01-09 22:20:39 -0800171}
172
Siarhei Vishniakou592bac22018-11-08 19:42:38 -0800173static nsecs_t processEventTimestamp(const struct input_event& event) {
174 // Use the time specified in the event instead of the current time
175 // so that downstream code can get more accurate estimates of
176 // event dispatch latency from the time the event is enqueued onto
177 // the evdev client buffer.
178 //
179 // The event's timestamp fortuitously uses the same monotonic clock
180 // time base as the rest of Android. The kernel event device driver
181 // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts().
182 // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere
183 // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a
184 // system call that also queries ktime_get_ts().
185
186 const nsecs_t inputEventTime = seconds_to_nanoseconds(event.time.tv_sec) +
187 microseconds_to_nanoseconds(event.time.tv_usec);
188 return inputEventTime;
189}
190
Kim Low03ea0352020-11-06 12:45:07 -0800191/**
192 * Returns the sysfs root path of the input device
193 *
194 */
Chris Ye3fdbfef2021-01-06 18:45:18 -0800195static std::optional<std::filesystem::path> getSysfsRootPath(const char* devicePath) {
Kim Low03ea0352020-11-06 12:45:07 -0800196 std::error_code errorCode;
197
198 // Stat the device path to get the major and minor number of the character file
199 struct stat statbuf;
200 if (stat(devicePath, &statbuf) == -1) {
201 ALOGE("Could not stat device %s due to error: %s.", devicePath, std::strerror(errno));
Chris Ye3fdbfef2021-01-06 18:45:18 -0800202 return std::nullopt;
Kim Low03ea0352020-11-06 12:45:07 -0800203 }
204
205 unsigned int major_num = major(statbuf.st_rdev);
206 unsigned int minor_num = minor(statbuf.st_rdev);
207
208 // Realpath "/sys/dev/char/{major}:{minor}" to get the sysfs path to the input event
209 auto sysfsPath = std::filesystem::path("/sys/dev/char/");
210 sysfsPath /= std::to_string(major_num) + ":" + std::to_string(minor_num);
211 sysfsPath = std::filesystem::canonical(sysfsPath, errorCode);
212
213 // Make sure nothing went wrong in call to canonical()
214 if (errorCode) {
215 ALOGW("Could not run filesystem::canonical() due to error %d : %s.", errorCode.value(),
216 errorCode.message().c_str());
Chris Ye3fdbfef2021-01-06 18:45:18 -0800217 return std::nullopt;
Kim Low03ea0352020-11-06 12:45:07 -0800218 }
219
220 // Continue to go up a directory until we reach a directory named "input"
221 while (sysfsPath != "/" && sysfsPath.filename() != "input") {
222 sysfsPath = sysfsPath.parent_path();
223 }
224
225 // Then go up one more and you will be at the sysfs root of the device
226 sysfsPath = sysfsPath.parent_path();
227
228 // Make sure we didn't reach root path and that directory actually exists
229 if (sysfsPath == "/" || !std::filesystem::exists(sysfsPath, errorCode)) {
230 if (errorCode) {
231 ALOGW("Could not run filesystem::exists() due to error %d : %s.", errorCode.value(),
232 errorCode.message().c_str());
233 }
234
235 // Not found
Chris Ye3fdbfef2021-01-06 18:45:18 -0800236 return std::nullopt;
Kim Low03ea0352020-11-06 12:45:07 -0800237 }
238
239 return sysfsPath;
240}
241
242/**
Chris Ye3fdbfef2021-01-06 18:45:18 -0800243 * Returns the list of files under a specified path.
Kim Low03ea0352020-11-06 12:45:07 -0800244 */
Chris Ye3fdbfef2021-01-06 18:45:18 -0800245static std::vector<std::filesystem::path> allFilesInPath(const std::filesystem::path& path) {
246 std::vector<std::filesystem::path> nodes;
247 std::error_code errorCode;
248 auto iter = std::filesystem::directory_iterator(path, errorCode);
249 while (!errorCode && iter != std::filesystem::directory_iterator()) {
250 nodes.push_back(iter->path());
251 iter++;
252 }
253 return nodes;
254}
255
256/**
257 * Returns the list of files under a specified directory in a sysfs path.
258 * Example:
259 * findSysfsNodes(sysfsRootPath, SysfsClass::LEDS) will return all led nodes under "leds" directory
260 * in the sysfs path.
261 */
262static std::vector<std::filesystem::path> findSysfsNodes(const std::filesystem::path& sysfsRoot,
263 SysfsClass clazz) {
264 std::string nodeStr = NamedEnum::string(clazz);
265 std::for_each(nodeStr.begin(), nodeStr.end(),
266 [](char& c) { c = std::tolower(static_cast<unsigned char>(c)); });
267 std::vector<std::filesystem::path> nodes;
268 for (auto path = sysfsRoot; path != "/" && nodes.empty(); path = path.parent_path()) {
269 nodes = allFilesInPath(path / nodeStr);
270 }
271 return nodes;
272}
273
274static std::optional<std::array<LightColor, COLOR_NUM>> getColorIndexArray(
275 std::filesystem::path path) {
276 std::string indexStr;
277 if (!base::ReadFileToString(path, &indexStr)) {
278 return std::nullopt;
279 }
280
281 // Parse the multi color LED index file, refer to kernel docs
282 // leds/leds-class-multicolor.html
283 std::regex indexPattern("(red|green|blue)\\s(red|green|blue)\\s(red|green|blue)[\\n]");
284 std::smatch results;
285 std::array<LightColor, COLOR_NUM> colors;
286 if (!std::regex_match(indexStr, results, indexPattern)) {
287 return std::nullopt;
288 }
289
290 for (size_t i = 1; i < results.size(); i++) {
291 const auto it = LIGHT_COLORS.find(results[i].str());
292 if (it != LIGHT_COLORS.end()) {
293 // intensities.emplace(it->second, 0);
294 colors[i - 1] = it->second;
Kim Low03ea0352020-11-06 12:45:07 -0800295 }
296 }
Chris Ye3fdbfef2021-01-06 18:45:18 -0800297 return colors;
Kim Low03ea0352020-11-06 12:45:07 -0800298}
299
Michael Wrightd02c5b62014-02-10 15:10:22 -0800300// --- Global Functions ---
301
Chris Ye1b0c7342020-07-28 21:57:03 -0700302Flags<InputDeviceClass> getAbsAxisUsage(int32_t axis, Flags<InputDeviceClass> deviceClasses) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800303 // Touch devices get dibs on touch-related axes.
Chris Ye1b0c7342020-07-28 21:57:03 -0700304 if (deviceClasses.test(InputDeviceClass::TOUCH)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800305 switch (axis) {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700306 case ABS_X:
307 case ABS_Y:
308 case ABS_PRESSURE:
309 case ABS_TOOL_WIDTH:
310 case ABS_DISTANCE:
311 case ABS_TILT_X:
312 case ABS_TILT_Y:
313 case ABS_MT_SLOT:
314 case ABS_MT_TOUCH_MAJOR:
315 case ABS_MT_TOUCH_MINOR:
316 case ABS_MT_WIDTH_MAJOR:
317 case ABS_MT_WIDTH_MINOR:
318 case ABS_MT_ORIENTATION:
319 case ABS_MT_POSITION_X:
320 case ABS_MT_POSITION_Y:
321 case ABS_MT_TOOL_TYPE:
322 case ABS_MT_BLOB_ID:
323 case ABS_MT_TRACKING_ID:
324 case ABS_MT_PRESSURE:
325 case ABS_MT_DISTANCE:
Chris Ye1b0c7342020-07-28 21:57:03 -0700326 return InputDeviceClass::TOUCH;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800327 }
328 }
329
Chris Yef59a2f42020-10-16 12:55:26 -0700330 if (deviceClasses.test(InputDeviceClass::SENSOR)) {
331 switch (axis) {
332 case ABS_X:
333 case ABS_Y:
334 case ABS_Z:
335 case ABS_RX:
336 case ABS_RY:
337 case ABS_RZ:
338 return InputDeviceClass::SENSOR;
339 }
340 }
341
Michael Wright842500e2015-03-13 17:32:02 -0700342 // External stylus gets the pressure axis
Chris Ye1b0c7342020-07-28 21:57:03 -0700343 if (deviceClasses.test(InputDeviceClass::EXTERNAL_STYLUS)) {
Michael Wright842500e2015-03-13 17:32:02 -0700344 if (axis == ABS_PRESSURE) {
Chris Ye1b0c7342020-07-28 21:57:03 -0700345 return InputDeviceClass::EXTERNAL_STYLUS;
Michael Wright842500e2015-03-13 17:32:02 -0700346 }
347 }
348
Michael Wrightd02c5b62014-02-10 15:10:22 -0800349 // Joystick devices get the rest.
Chris Ye1b0c7342020-07-28 21:57:03 -0700350 return deviceClasses & InputDeviceClass::JOYSTICK;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800351}
352
353// --- EventHub::Device ---
354
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100355EventHub::Device::Device(int fd, int32_t id, const std::string& path,
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700356 const InputDeviceIdentifier& identifier)
Chris Ye989bb932020-07-04 16:18:59 -0700357 : fd(fd),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700358 id(id),
359 path(path),
360 identifier(identifier),
361 classes(0),
362 configuration(nullptr),
363 virtualKeyMap(nullptr),
364 ffEffectPlaying(false),
365 ffEffectId(-1),
Chris Yee2b1e5c2021-03-10 22:45:12 -0800366 miscDevice(nullptr),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700367 controllerNumber(0),
368 enabled(true),
Chris Ye66fbac32020-07-06 20:36:43 -0700369 isVirtual(fd < 0) {}
Michael Wrightd02c5b62014-02-10 15:10:22 -0800370
371EventHub::Device::~Device() {
372 close();
Michael Wrightd02c5b62014-02-10 15:10:22 -0800373}
374
375void EventHub::Device::close() {
376 if (fd >= 0) {
377 ::close(fd);
378 fd = -1;
379 }
380}
381
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -0700382status_t EventHub::Device::enable() {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100383 fd = open(path.c_str(), O_RDWR | O_CLOEXEC | O_NONBLOCK);
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700384 if (fd < 0) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +0100385 ALOGE("could not open %s, %s\n", path.c_str(), strerror(errno));
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -0700386 return -errno;
387 }
388 enabled = true;
389 return OK;
390}
391
392status_t EventHub::Device::disable() {
393 close();
394 enabled = false;
395 return OK;
396}
397
Chris Ye989bb932020-07-04 16:18:59 -0700398bool EventHub::Device::hasValidFd() const {
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -0700399 return !isVirtual && enabled;
400}
Michael Wrightd02c5b62014-02-10 15:10:22 -0800401
Chris Ye3a1e4462020-08-12 10:13:15 -0700402const std::shared_ptr<KeyCharacterMap> EventHub::Device::getKeyCharacterMap() const {
Chris Ye989bb932020-07-04 16:18:59 -0700403 return keyMap.keyCharacterMap;
404}
405
406template <std::size_t N>
407status_t EventHub::Device::readDeviceBitMask(unsigned long ioctlCode, BitArray<N>& bitArray) {
408 if (!hasValidFd()) {
409 return BAD_VALUE;
410 }
411 if ((_IOC_SIZE(ioctlCode) == 0)) {
412 ioctlCode |= _IOC(0, 0, 0, bitArray.bytes());
413 }
414
415 typename BitArray<N>::Buffer buffer;
416 status_t ret = ioctl(fd, ioctlCode, buffer.data());
417 bitArray.loadFromBuffer(buffer);
418 return ret;
419}
420
421void EventHub::Device::configureFd() {
422 // Set fd parameters with ioctl, such as key repeat, suspend block, and clock type
423 if (classes.test(InputDeviceClass::KEYBOARD)) {
424 // Disable kernel key repeat since we handle it ourselves
425 unsigned int repeatRate[] = {0, 0};
426 if (ioctl(fd, EVIOCSREP, repeatRate)) {
427 ALOGW("Unable to disable kernel key repeat for %s: %s", path.c_str(), strerror(errno));
428 }
429 }
430
431 // Tell the kernel that we want to use the monotonic clock for reporting timestamps
432 // associated with input events. This is important because the input system
433 // uses the timestamps extensively and assumes they were recorded using the monotonic
434 // clock.
435 int clockId = CLOCK_MONOTONIC;
Chris Yef59a2f42020-10-16 12:55:26 -0700436 if (classes.test(InputDeviceClass::SENSOR)) {
437 // Each new sensor event should use the same time base as
438 // SystemClock.elapsedRealtimeNanos().
439 clockId = CLOCK_BOOTTIME;
440 }
Chris Ye989bb932020-07-04 16:18:59 -0700441 bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId);
442 ALOGI("usingClockIoctl=%s", toString(usingClockIoctl));
443}
444
445bool EventHub::Device::hasKeycodeLocked(int keycode) const {
446 if (!keyMap.haveKeyLayout()) {
447 return false;
448 }
449
450 std::vector<int32_t> scanCodes;
451 keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes);
452 const size_t N = scanCodes.size();
453 for (size_t i = 0; i < N && i <= KEY_MAX; i++) {
454 int32_t sc = scanCodes[i];
455 if (sc >= 0 && sc <= KEY_MAX && keyBitmask.test(sc)) {
456 return true;
457 }
458 }
459
460 return false;
461}
462
463void EventHub::Device::loadConfigurationLocked() {
464 configurationFile =
465 getInputDeviceConfigurationFilePathByDeviceIdentifier(identifier,
466 InputDeviceConfigurationFileType::
467 CONFIGURATION);
468 if (configurationFile.empty()) {
469 ALOGD("No input device configuration file found for device '%s'.", identifier.name.c_str());
470 } else {
Siarhei Vishniakou4d9f9772020-09-02 22:28:29 -0500471 android::base::Result<std::unique_ptr<PropertyMap>> propertyMap =
472 PropertyMap::load(configurationFile.c_str());
473 if (!propertyMap.ok()) {
Chris Ye989bb932020-07-04 16:18:59 -0700474 ALOGE("Error loading input device configuration file for device '%s'. "
475 "Using default configuration.",
476 identifier.name.c_str());
Siarhei Vishniakoud549b252020-08-11 11:25:26 -0500477 } else {
Siarhei Vishniakou4d9f9772020-09-02 22:28:29 -0500478 configuration = std::move(*propertyMap);
Chris Ye989bb932020-07-04 16:18:59 -0700479 }
480 }
481}
482
483bool EventHub::Device::loadVirtualKeyMapLocked() {
484 // The virtual key map is supplied by the kernel as a system board property file.
485 std::string propPath = "/sys/board_properties/virtualkeys.";
486 propPath += identifier.getCanonicalName();
487 if (access(propPath.c_str(), R_OK)) {
488 return false;
489 }
490 virtualKeyMap = VirtualKeyMap::load(propPath);
491 return virtualKeyMap != nullptr;
492}
493
494status_t EventHub::Device::loadKeyMapLocked() {
Siarhei Vishniakoud549b252020-08-11 11:25:26 -0500495 return keyMap.load(identifier, configuration.get());
Chris Ye989bb932020-07-04 16:18:59 -0700496}
497
498bool EventHub::Device::isExternalDeviceLocked() {
499 if (configuration) {
500 bool value;
501 if (configuration->tryGetProperty(String8("device.internal"), value)) {
502 return !value;
503 }
504 }
505 return identifier.bus == BUS_USB || identifier.bus == BUS_BLUETOOTH;
506}
507
508bool EventHub::Device::deviceHasMicLocked() {
509 if (configuration) {
510 bool value;
511 if (configuration->tryGetProperty(String8("audio.mic"), value)) {
512 return value;
513 }
514 }
515 return false;
516}
517
518void EventHub::Device::setLedStateLocked(int32_t led, bool on) {
519 int32_t sc;
520 if (hasValidFd() && mapLed(led, &sc) != NAME_NOT_FOUND) {
521 struct input_event ev;
522 ev.time.tv_sec = 0;
523 ev.time.tv_usec = 0;
524 ev.type = EV_LED;
525 ev.code = sc;
526 ev.value = on ? 1 : 0;
527
528 ssize_t nWrite;
529 do {
530 nWrite = write(fd, &ev, sizeof(struct input_event));
531 } while (nWrite == -1 && errno == EINTR);
532 }
533}
534
535void EventHub::Device::setLedForControllerLocked() {
536 for (int i = 0; i < MAX_CONTROLLER_LEDS; i++) {
537 setLedStateLocked(ALED_CONTROLLER_1 + i, controllerNumber == i + 1);
538 }
539}
540
541status_t EventHub::Device::mapLed(int32_t led, int32_t* outScanCode) const {
542 if (!keyMap.haveKeyLayout()) {
543 return NAME_NOT_FOUND;
544 }
545
546 int32_t scanCode;
547 if (keyMap.keyLayoutMap->findScanCodeForLed(led, &scanCode) != NAME_NOT_FOUND) {
548 if (scanCode >= 0 && scanCode <= LED_MAX && ledBitmask.test(scanCode)) {
549 *outScanCode = scanCode;
550 return NO_ERROR;
551 }
552 }
553 return NAME_NOT_FOUND;
554}
555
Chris Ye3fdbfef2021-01-06 18:45:18 -0800556// Check the sysfs path for any input device batteries, returns true if battery found.
Chris Yee2b1e5c2021-03-10 22:45:12 -0800557bool EventHub::MiscDevice::configureBatteryLocked() {
558 nextBatteryId = 0;
559 // Check if device has any battery.
560 const auto& paths = findSysfsNodes(sysfsRootPath, SysfsClass::POWER_SUPPLY);
561 for (const auto& nodePath : paths) {
562 RawBatteryInfo info;
563 info.id = ++nextBatteryId;
564 info.path = nodePath;
565 info.name = nodePath.filename();
566
567 // Scan the path for all the files
568 // Refer to https://www.kernel.org/doc/Documentation/leds/leds-class.txt
569 const auto& files = allFilesInPath(nodePath);
570 for (const auto& file : files) {
571 const auto it = BATTERY_CLASSES.find(file.filename().string());
572 if (it != BATTERY_CLASSES.end()) {
573 info.flags |= it->second;
574 }
575 }
576 batteryInfos.insert_or_assign(info.id, info);
577 ALOGD("configureBatteryLocked rawBatteryId %d name %s", info.id, info.name.c_str());
Chris Ye3fdbfef2021-01-06 18:45:18 -0800578 }
Chris Yee2b1e5c2021-03-10 22:45:12 -0800579 return !batteryInfos.empty();
Chris Ye3fdbfef2021-01-06 18:45:18 -0800580}
581
582// Check the sysfs path for any input device lights, returns true if lights found.
Chris Yee2b1e5c2021-03-10 22:45:12 -0800583bool EventHub::MiscDevice::configureLightsLocked() {
584 nextLightId = 0;
Chris Ye3fdbfef2021-01-06 18:45:18 -0800585 // Check if device has any lights.
Chris Yee2b1e5c2021-03-10 22:45:12 -0800586 const auto& paths = findSysfsNodes(sysfsRootPath, SysfsClass::LEDS);
Chris Ye3fdbfef2021-01-06 18:45:18 -0800587 for (const auto& nodePath : paths) {
588 RawLightInfo info;
589 info.id = ++nextLightId;
590 info.path = nodePath;
591 info.name = nodePath.filename();
592 info.maxBrightness = std::nullopt;
593 size_t nameStart = info.name.rfind(":");
594 if (nameStart != std::string::npos) {
595 // Trim the name to color name
596 info.name = info.name.substr(nameStart + 1);
597 // Set InputLightClass flag for colors
598 const auto it = LIGHT_CLASSES.find(info.name);
599 if (it != LIGHT_CLASSES.end()) {
600 info.flags |= it->second;
601 }
602 }
603 // Scan the path for all the files
604 // Refer to https://www.kernel.org/doc/Documentation/leds/leds-class.txt
605 const auto& files = allFilesInPath(nodePath);
606 for (const auto& file : files) {
607 const auto it = LIGHT_CLASSES.find(file.filename().string());
608 if (it != LIGHT_CLASSES.end()) {
609 info.flags |= it->second;
610 // If the node has maximum brightness, read it
611 if (it->second == InputLightClass::MAX_BRIGHTNESS) {
612 std::string str;
613 if (base::ReadFileToString(file, &str)) {
614 info.maxBrightness = std::stoi(str);
615 }
616 }
617 }
618 }
619 lightInfos.insert_or_assign(info.id, info);
Chris Yee2b1e5c2021-03-10 22:45:12 -0800620 ALOGD("configureLightsLocked rawLightId %d name %s", info.id, info.name.c_str());
Chris Ye3fdbfef2021-01-06 18:45:18 -0800621 }
622 return !lightInfos.empty();
623}
624
Siarhei Vishniakou7a522bf2019-09-24 12:46:29 +0100625/**
626 * Get the capabilities for the current process.
627 * Crashes the system if unable to create / check / destroy the capabilities object.
628 */
629class Capabilities final {
630public:
631 explicit Capabilities() {
632 mCaps = cap_get_proc();
633 LOG_ALWAYS_FATAL_IF(mCaps == nullptr, "Could not get capabilities of the current process");
634 }
635
636 /**
637 * Check whether the current process has a specific capability
638 * in the set of effective capabilities.
639 * Return CAP_SET if the process has the requested capability
640 * Return CAP_CLEAR otherwise.
641 */
642 cap_flag_value_t checkEffectiveCapability(cap_value_t capability) {
643 cap_flag_value_t value;
644 const int result = cap_get_flag(mCaps, capability, CAP_EFFECTIVE, &value);
645 LOG_ALWAYS_FATAL_IF(result == -1, "Could not obtain the requested capability");
646 return value;
647 }
648
649 ~Capabilities() {
650 const int result = cap_free(mCaps);
651 LOG_ALWAYS_FATAL_IF(result == -1, "Could not release the capabilities structure");
652 }
653
654private:
655 cap_t mCaps;
656};
657
658static void ensureProcessCanBlockSuspend() {
659 Capabilities capabilities;
660 const bool canBlockSuspend =
661 capabilities.checkEffectiveCapability(CAP_BLOCK_SUSPEND) == CAP_SET;
662 LOG_ALWAYS_FATAL_IF(!canBlockSuspend,
663 "Input must be able to block suspend to properly process events");
664}
665
Michael Wrightd02c5b62014-02-10 15:10:22 -0800666// --- EventHub ---
667
Michael Wrightd02c5b62014-02-10 15:10:22 -0800668const int EventHub::EPOLL_MAX_EVENTS;
669
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700670EventHub::EventHub(void)
671 : mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD),
672 mNextDeviceId(1),
673 mControllerNumbers(),
Michael Wrightd02c5b62014-02-10 15:10:22 -0800674 mNeedToSendFinishedDeviceScan(false),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700675 mNeedToReopenDevices(false),
676 mNeedToScanDevices(true),
677 mPendingEventCount(0),
678 mPendingEventIndex(0),
679 mPendingINotify(false) {
Siarhei Vishniakou7a522bf2019-09-24 12:46:29 +0100680 ensureProcessCanBlockSuspend();
Michael Wrightd02c5b62014-02-10 15:10:22 -0800681
Nick Kralevichfcf1b2b2018-12-15 11:59:30 -0800682 mEpollFd = epoll_create1(EPOLL_CLOEXEC);
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800683 LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance: %s", strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -0800684
685 mINotifyFd = inotify_init();
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800686 mInputWd = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE);
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700687 LOG_ALWAYS_FATAL_IF(mInputWd < 0, "Could not register INotify for %s: %s", DEVICE_PATH,
688 strerror(errno));
Philip Quinn39b81682019-01-09 22:20:39 -0800689 if (isV4lScanningEnabled()) {
690 mVideoWd = inotify_add_watch(mINotifyFd, VIDEO_DEVICE_PATH, IN_DELETE | IN_CREATE);
691 LOG_ALWAYS_FATAL_IF(mVideoWd < 0, "Could not register INotify for %s: %s",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700692 VIDEO_DEVICE_PATH, strerror(errno));
Philip Quinn39b81682019-01-09 22:20:39 -0800693 } else {
694 mVideoWd = -1;
695 ALOGI("Video device scanning disabled");
696 }
Michael Wrightd02c5b62014-02-10 15:10:22 -0800697
Siarhei Vishniakou2d0e9482019-09-24 12:52:47 +0100698 struct epoll_event eventItem = {};
699 eventItem.events = EPOLLIN | EPOLLWAKEUP;
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -0700700 eventItem.data.fd = mINotifyFd;
Siarhei Vishniakou951f3622018-12-12 19:45:42 -0800701 int result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800702 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance. errno=%d", errno);
703
704 int wakeFds[2];
705 result = pipe(wakeFds);
706 LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe. errno=%d", errno);
707
708 mWakeReadPipeFd = wakeFds[0];
709 mWakeWritePipeFd = wakeFds[1];
710
711 result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK);
712 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking. errno=%d",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700713 errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800714
715 result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK);
716 LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking. errno=%d",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700717 errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800718
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -0700719 eventItem.data.fd = mWakeReadPipeFd;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800720 result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem);
721 LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance. errno=%d",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700722 errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800723}
724
725EventHub::~EventHub(void) {
726 closeAllDevicesLocked();
727
Michael Wrightd02c5b62014-02-10 15:10:22 -0800728 ::close(mEpollFd);
729 ::close(mINotifyFd);
730 ::close(mWakeReadPipeFd);
731 ::close(mWakeWritePipeFd);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800732}
733
734InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const {
Chris Ye87143712020-11-10 05:05:58 +0000735 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800736 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -0700737 return device != nullptr ? device->identifier : InputDeviceIdentifier();
Michael Wrightd02c5b62014-02-10 15:10:22 -0800738}
739
Chris Ye1b0c7342020-07-28 21:57:03 -0700740Flags<InputDeviceClass> EventHub::getDeviceClasses(int32_t deviceId) const {
Chris Ye87143712020-11-10 05:05:58 +0000741 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800742 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -0700743 return device != nullptr ? device->classes : Flags<InputDeviceClass>(0);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800744}
745
746int32_t EventHub::getDeviceControllerNumber(int32_t deviceId) const {
Chris Ye87143712020-11-10 05:05:58 +0000747 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800748 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -0700749 return device != nullptr ? device->controllerNumber : 0;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800750}
751
752void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const {
Chris Ye87143712020-11-10 05:05:58 +0000753 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800754 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -0700755 if (device != nullptr && device->configuration) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800756 *outConfiguration = *device->configuration;
757 } else {
758 outConfiguration->clear();
759 }
760}
761
762status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis,
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700763 RawAbsoluteAxisInfo* outAxisInfo) const {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800764 outAxisInfo->clear();
765
766 if (axis >= 0 && axis <= ABS_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000767 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800768
769 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700770 if (device != nullptr && device->hasValidFd() && device->absBitmask.test(axis)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800771 struct input_absinfo info;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700772 if (ioctl(device->fd, EVIOCGABS(axis), &info)) {
773 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", axis,
774 device->identifier.name.c_str(), device->fd, errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800775 return -errno;
776 }
777
778 if (info.minimum != info.maximum) {
779 outAxisInfo->valid = true;
780 outAxisInfo->minValue = info.minimum;
781 outAxisInfo->maxValue = info.maximum;
782 outAxisInfo->flat = info.flat;
783 outAxisInfo->fuzz = info.fuzz;
784 outAxisInfo->resolution = info.resolution;
785 }
786 return OK;
787 }
788 }
789 return -1;
790}
791
792bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const {
793 if (axis >= 0 && axis <= REL_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000794 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800795 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700796 return device != nullptr ? device->relBitmask.test(axis) : false;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800797 }
798 return false;
799}
800
801bool EventHub::hasInputProperty(int32_t deviceId, int property) const {
Chris Ye87143712020-11-10 05:05:58 +0000802 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800803
Chris Ye989bb932020-07-04 16:18:59 -0700804 Device* device = getDeviceLocked(deviceId);
805 return property >= 0 && property <= INPUT_PROP_MAX && device != nullptr
806 ? device->propBitmask.test(property)
807 : false;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800808}
809
Chris Yef59a2f42020-10-16 12:55:26 -0700810bool EventHub::hasMscEvent(int32_t deviceId, int mscEvent) const {
811 std::scoped_lock _l(mLock);
812
813 Device* device = getDeviceLocked(deviceId);
814 return mscEvent >= 0 && mscEvent <= MSC_MAX && device != nullptr
815 ? device->mscBitmask.test(mscEvent)
816 : false;
817}
818
Michael Wrightd02c5b62014-02-10 15:10:22 -0800819int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const {
820 if (scanCode >= 0 && scanCode <= KEY_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000821 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800822
823 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700824 if (device != nullptr && device->hasValidFd() && device->keyBitmask.test(scanCode)) {
825 if (device->readDeviceBitMask(EVIOCGKEY(0), device->keyState) >= 0) {
826 return device->keyState.test(scanCode) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800827 }
828 }
829 }
830 return AKEY_STATE_UNKNOWN;
831}
832
833int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const {
Chris Ye87143712020-11-10 05:05:58 +0000834 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800835
836 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700837 if (device != nullptr && device->hasValidFd() && device->keyMap.haveKeyLayout()) {
Arthur Hung7c3ae9c2019-03-11 11:23:03 +0800838 std::vector<int32_t> scanCodes;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800839 device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes);
840 if (scanCodes.size() != 0) {
Chris Ye66fbac32020-07-06 20:36:43 -0700841 if (device->readDeviceBitMask(EVIOCGKEY(0), device->keyState) >= 0) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800842 for (size_t i = 0; i < scanCodes.size(); i++) {
Arthur Hung7c3ae9c2019-03-11 11:23:03 +0800843 int32_t sc = scanCodes[i];
Chris Ye66fbac32020-07-06 20:36:43 -0700844 if (sc >= 0 && sc <= KEY_MAX && device->keyState.test(sc)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800845 return AKEY_STATE_DOWN;
846 }
847 }
848 return AKEY_STATE_UP;
849 }
850 }
851 }
852 return AKEY_STATE_UNKNOWN;
853}
854
855int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const {
856 if (sw >= 0 && sw <= SW_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000857 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800858
859 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700860 if (device != nullptr && device->hasValidFd() && device->swBitmask.test(sw)) {
861 if (device->readDeviceBitMask(EVIOCGSW(0), device->swState) >= 0) {
862 return device->swState.test(sw) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800863 }
864 }
865 }
866 return AKEY_STATE_UNKNOWN;
867}
868
869status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const {
870 *outValue = 0;
871
872 if (axis >= 0 && axis <= ABS_MAX) {
Chris Ye87143712020-11-10 05:05:58 +0000873 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800874
875 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700876 if (device != nullptr && device->hasValidFd() && device->absBitmask.test(axis)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800877 struct input_absinfo info;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700878 if (ioctl(device->fd, EVIOCGABS(axis), &info)) {
879 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d", axis,
880 device->identifier.name.c_str(), device->fd, errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800881 return -errno;
882 }
883
884 *outValue = info.value;
885 return OK;
886 }
887 }
888 return -1;
889}
890
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700891bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,
892 uint8_t* outFlags) const {
Chris Ye87143712020-11-10 05:05:58 +0000893 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800894
895 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -0700896 if (device != nullptr && device->keyMap.haveKeyLayout()) {
Arthur Hung7c3ae9c2019-03-11 11:23:03 +0800897 std::vector<int32_t> scanCodes;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800898 for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) {
899 scanCodes.clear();
900
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700901 status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey(keyCodes[codeIndex],
902 &scanCodes);
903 if (!err) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800904 // check the possible scan codes identified by the layout map against the
905 // map of codes actually emitted by the driver
906 for (size_t sc = 0; sc < scanCodes.size(); sc++) {
Chris Ye66fbac32020-07-06 20:36:43 -0700907 if (device->keyBitmask.test(scanCodes[sc])) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800908 outFlags[codeIndex] = 1;
909 break;
910 }
911 }
912 }
913 }
914 return true;
915 }
916 return false;
917}
918
Prabir Pradhanda7c00c2019-08-29 14:12:42 -0700919status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode, int32_t metaState,
920 int32_t* outKeycode, int32_t* outMetaState, uint32_t* outFlags) const {
Chris Ye87143712020-11-10 05:05:58 +0000921 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800922 Device* device = getDeviceLocked(deviceId);
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -0700923 status_t status = NAME_NOT_FOUND;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800924
Chris Ye66fbac32020-07-06 20:36:43 -0700925 if (device != nullptr) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800926 // Check the key character map first.
Chris Ye3a1e4462020-08-12 10:13:15 -0700927 const std::shared_ptr<KeyCharacterMap> kcm = device->getKeyCharacterMap();
928 if (kcm) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800929 if (!kcm->mapKey(scanCode, usageCode, outKeycode)) {
930 *outFlags = 0;
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -0700931 status = NO_ERROR;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800932 }
933 }
934
935 // Check the key layout next.
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -0700936 if (status != NO_ERROR && device->keyMap.haveKeyLayout()) {
Siarhei Vishniakou592bac22018-11-08 19:42:38 -0800937 if (!device->keyMap.keyLayoutMap->mapKey(scanCode, usageCode, outKeycode, outFlags)) {
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -0700938 status = NO_ERROR;
939 }
940 }
941
942 if (status == NO_ERROR) {
Chris Ye3a1e4462020-08-12 10:13:15 -0700943 if (kcm) {
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -0700944 kcm->tryRemapKey(*outKeycode, metaState, outKeycode, outMetaState);
945 } else {
946 *outMetaState = metaState;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800947 }
948 }
949 }
950
Dmitry Torokhov0faaa0b2015-09-24 13:13:55 -0700951 if (status != NO_ERROR) {
952 *outKeycode = 0;
953 *outFlags = 0;
954 *outMetaState = metaState;
955 }
956
957 return status;
Michael Wrightd02c5b62014-02-10 15:10:22 -0800958}
959
960status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const {
Chris Ye87143712020-11-10 05:05:58 +0000961 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -0800962 Device* device = getDeviceLocked(deviceId);
963
Chris Ye66fbac32020-07-06 20:36:43 -0700964 if (device != nullptr && device->keyMap.haveKeyLayout()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -0800965 status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo);
966 if (err == NO_ERROR) {
967 return NO_ERROR;
968 }
969 }
970
971 return NAME_NOT_FOUND;
972}
973
Chris Yef59a2f42020-10-16 12:55:26 -0700974base::Result<std::pair<InputDeviceSensorType, int32_t>> EventHub::mapSensor(int32_t deviceId,
975 int32_t absCode) {
976 std::scoped_lock _l(mLock);
977 Device* device = getDeviceLocked(deviceId);
978
979 if (device != nullptr && device->keyMap.haveKeyLayout()) {
980 return device->keyMap.keyLayoutMap->mapSensor(absCode);
981 }
982 return Errorf("Device not found or device has no key layout.");
983}
984
Chris Yee2b1e5c2021-03-10 22:45:12 -0800985// Gets the battery info map from battery ID to RawBatteryInfo of the miscellaneous device
986// associated with the device ID. Returns an empty map if no miscellaneous device found.
987const std::unordered_map<int32_t, RawBatteryInfo>& EventHub::getBatteryInfoLocked(
988 int32_t deviceId) const {
989 static const std::unordered_map<int32_t, RawBatteryInfo> EMPTY_BATTERY_INFO = {};
990 Device* device = getDeviceLocked(deviceId);
991 if (device == nullptr) {
992 return EMPTY_BATTERY_INFO;
993 }
994 auto it = mMiscDevices.find(device->identifier.descriptor);
995 if (it == mMiscDevices.end()) {
996 return EMPTY_BATTERY_INFO;
997 }
998 return it->second->batteryInfos;
999}
1000
1001const std::vector<int32_t> EventHub::getRawBatteryIds(int32_t deviceId) {
1002 std::scoped_lock _l(mLock);
1003 std::vector<int32_t> batteryIds;
1004
1005 for (const auto [id, info] : getBatteryInfoLocked(deviceId)) {
1006 batteryIds.push_back(id);
1007 }
1008
1009 return batteryIds;
1010}
1011
1012std::optional<RawBatteryInfo> EventHub::getRawBatteryInfo(int32_t deviceId, int32_t batteryId) {
1013 std::scoped_lock _l(mLock);
1014
1015 const auto infos = getBatteryInfoLocked(deviceId);
1016
1017 auto it = infos.find(batteryId);
1018 if (it != infos.end()) {
1019 return it->second;
1020 }
1021
1022 return std::nullopt;
1023}
1024
1025// Gets the light info map from light ID to RawLightInfo of the miscellaneous device associated
1026// with the deivice ID. Returns an empty map if no miscellaneous device found.
1027const std::unordered_map<int32_t, RawLightInfo>& EventHub::getLightInfoLocked(
1028 int32_t deviceId) const {
1029 static const std::unordered_map<int32_t, RawLightInfo> EMPTY_LIGHT_INFO = {};
1030 Device* device = getDeviceLocked(deviceId);
1031 if (device == nullptr) {
1032 return EMPTY_LIGHT_INFO;
1033 }
1034 auto it = mMiscDevices.find(device->identifier.descriptor);
1035 if (it == mMiscDevices.end()) {
1036 return EMPTY_LIGHT_INFO;
1037 }
1038 return it->second->lightInfos;
1039}
1040
Chris Ye3fdbfef2021-01-06 18:45:18 -08001041const std::vector<int32_t> EventHub::getRawLightIds(int32_t deviceId) {
1042 std::scoped_lock _l(mLock);
Chris Ye3fdbfef2021-01-06 18:45:18 -08001043 std::vector<int32_t> lightIds;
1044
Chris Yee2b1e5c2021-03-10 22:45:12 -08001045 for (const auto [id, info] : getLightInfoLocked(deviceId)) {
1046 lightIds.push_back(id);
Chris Ye3fdbfef2021-01-06 18:45:18 -08001047 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001048
Chris Ye3fdbfef2021-01-06 18:45:18 -08001049 return lightIds;
1050}
1051
1052std::optional<RawLightInfo> EventHub::getRawLightInfo(int32_t deviceId, int32_t lightId) {
1053 std::scoped_lock _l(mLock);
Chris Ye3fdbfef2021-01-06 18:45:18 -08001054
Chris Yee2b1e5c2021-03-10 22:45:12 -08001055 const auto infos = getLightInfoLocked(deviceId);
1056
1057 auto it = infos.find(lightId);
1058 if (it != infos.end()) {
1059 return it->second;
Chris Ye3fdbfef2021-01-06 18:45:18 -08001060 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001061
Chris Ye3fdbfef2021-01-06 18:45:18 -08001062 return std::nullopt;
1063}
1064
1065std::optional<int32_t> EventHub::getLightBrightness(int32_t deviceId, int32_t lightId) {
1066 std::scoped_lock _l(mLock);
1067
Chris Yee2b1e5c2021-03-10 22:45:12 -08001068 const auto infos = getLightInfoLocked(deviceId);
1069 auto it = infos.find(lightId);
1070 if (it == infos.end()) {
Chris Ye3fdbfef2021-01-06 18:45:18 -08001071 return std::nullopt;
1072 }
1073 std::string buffer;
1074 if (!base::ReadFileToString(it->second.path / LIGHT_NODES.at(InputLightClass::BRIGHTNESS),
1075 &buffer)) {
1076 return std::nullopt;
1077 }
1078 return std::stoi(buffer);
1079}
1080
1081std::optional<std::unordered_map<LightColor, int32_t>> EventHub::getLightIntensities(
1082 int32_t deviceId, int32_t lightId) {
1083 std::scoped_lock _l(mLock);
1084
Chris Yee2b1e5c2021-03-10 22:45:12 -08001085 const auto infos = getLightInfoLocked(deviceId);
1086 auto lightIt = infos.find(lightId);
1087 if (lightIt == infos.end()) {
Chris Ye3fdbfef2021-01-06 18:45:18 -08001088 return std::nullopt;
1089 }
1090
1091 auto ret =
1092 getColorIndexArray(lightIt->second.path / LIGHT_NODES.at(InputLightClass::MULTI_INDEX));
1093
1094 if (!ret.has_value()) {
1095 return std::nullopt;
1096 }
1097 std::array<LightColor, COLOR_NUM> colors = ret.value();
1098
1099 std::string intensityStr;
1100 if (!base::ReadFileToString(lightIt->second.path /
1101 LIGHT_NODES.at(InputLightClass::MULTI_INTENSITY),
1102 &intensityStr)) {
1103 return std::nullopt;
1104 }
1105
1106 // Intensity node outputs 3 color values
1107 std::regex intensityPattern("([0-9]+)\\s([0-9]+)\\s([0-9]+)[\\n]");
1108 std::smatch results;
1109
1110 if (!std::regex_match(intensityStr, results, intensityPattern)) {
1111 return std::nullopt;
1112 }
1113 std::unordered_map<LightColor, int32_t> intensities;
1114 for (size_t i = 1; i < results.size(); i++) {
1115 int value = std::stoi(results[i].str());
1116 intensities.emplace(colors[i - 1], value);
1117 }
1118 return intensities;
1119}
1120
1121void EventHub::setLightBrightness(int32_t deviceId, int32_t lightId, int32_t brightness) {
1122 std::scoped_lock _l(mLock);
1123
Chris Yee2b1e5c2021-03-10 22:45:12 -08001124 const auto infos = getLightInfoLocked(deviceId);
1125 auto lightIt = infos.find(lightId);
1126 if (lightIt == infos.end()) {
1127 ALOGE("%s lightId %d not found ", __func__, lightId);
Chris Ye3fdbfef2021-01-06 18:45:18 -08001128 return;
1129 }
1130
1131 if (!base::WriteStringToFile(std::to_string(brightness),
1132 lightIt->second.path /
1133 LIGHT_NODES.at(InputLightClass::BRIGHTNESS))) {
1134 ALOGE("Can not write to file, error: %s", strerror(errno));
1135 }
1136}
1137
1138void EventHub::setLightIntensities(int32_t deviceId, int32_t lightId,
1139 std::unordered_map<LightColor, int32_t> intensities) {
1140 std::scoped_lock _l(mLock);
1141
Chris Yee2b1e5c2021-03-10 22:45:12 -08001142 const auto infos = getLightInfoLocked(deviceId);
1143 auto lightIt = infos.find(lightId);
1144 if (lightIt == infos.end()) {
Chris Ye3fdbfef2021-01-06 18:45:18 -08001145 ALOGE("Light Id %d does not exist.", lightId);
1146 return;
1147 }
1148
1149 auto ret =
1150 getColorIndexArray(lightIt->second.path / LIGHT_NODES.at(InputLightClass::MULTI_INDEX));
1151
1152 if (!ret.has_value()) {
1153 return;
1154 }
1155 std::array<LightColor, COLOR_NUM> colors = ret.value();
1156
1157 std::string rgbStr;
1158 for (size_t i = 0; i < COLOR_NUM; i++) {
1159 auto it = intensities.find(colors[i]);
1160 if (it != intensities.end()) {
1161 rgbStr += std::to_string(it->second);
1162 // Insert space between colors
1163 if (i < COLOR_NUM - 1) {
1164 rgbStr += " ";
1165 }
1166 }
1167 }
1168 // Append new line
1169 rgbStr += "\n";
1170
1171 if (!base::WriteStringToFile(rgbStr,
1172 lightIt->second.path /
1173 LIGHT_NODES.at(InputLightClass::MULTI_INTENSITY))) {
1174 ALOGE("Can not write to file, error: %s", strerror(errno));
1175 }
1176}
1177
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001178void EventHub::setExcludedDevices(const std::vector<std::string>& devices) {
Chris Ye87143712020-11-10 05:05:58 +00001179 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001180
1181 mExcludedDevices = devices;
1182}
1183
1184bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const {
Chris Ye87143712020-11-10 05:05:58 +00001185 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001186 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001187 if (device != nullptr && scanCode >= 0 && scanCode <= KEY_MAX) {
1188 return device->keyBitmask.test(scanCode);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001189 }
1190 return false;
1191}
1192
1193bool EventHub::hasLed(int32_t deviceId, int32_t led) const {
Chris Ye87143712020-11-10 05:05:58 +00001194 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001195 Device* device = getDeviceLocked(deviceId);
1196 int32_t sc;
Chris Ye989bb932020-07-04 16:18:59 -07001197 if (device != nullptr && device->mapLed(led, &sc) == NO_ERROR) {
Chris Ye66fbac32020-07-06 20:36:43 -07001198 return device->ledBitmask.test(sc);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001199 }
1200 return false;
1201}
1202
1203void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) {
Chris Ye87143712020-11-10 05:05:58 +00001204 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001205 Device* device = getDeviceLocked(deviceId);
Chris Ye989bb932020-07-04 16:18:59 -07001206 if (device != nullptr && device->hasValidFd()) {
1207 device->setLedStateLocked(led, on);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001208 }
1209}
1210
1211void EventHub::getVirtualKeyDefinitions(int32_t deviceId,
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001212 std::vector<VirtualKeyDefinition>& outVirtualKeys) const {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001213 outVirtualKeys.clear();
1214
Chris Ye87143712020-11-10 05:05:58 +00001215 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001216 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001217 if (device != nullptr && device->virtualKeyMap) {
Arthur Hung7c3ae9c2019-03-11 11:23:03 +08001218 const std::vector<VirtualKeyDefinition> virtualKeys =
1219 device->virtualKeyMap->getVirtualKeys();
1220 outVirtualKeys.insert(outVirtualKeys.end(), virtualKeys.begin(), virtualKeys.end());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001221 }
1222}
1223
Chris Ye3a1e4462020-08-12 10:13:15 -07001224const std::shared_ptr<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const {
Chris Ye87143712020-11-10 05:05:58 +00001225 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001226 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001227 if (device != nullptr) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001228 return device->getKeyCharacterMap();
1229 }
Yi Kong9b14ac62018-07-17 13:48:38 -07001230 return nullptr;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001231}
1232
Chris Ye3a1e4462020-08-12 10:13:15 -07001233bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId, std::shared_ptr<KeyCharacterMap> map) {
Chris Ye87143712020-11-10 05:05:58 +00001234 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001235 Device* device = getDeviceLocked(deviceId);
Chris Ye3a1e4462020-08-12 10:13:15 -07001236 if (device != nullptr && map != nullptr && device->keyMap.keyCharacterMap != nullptr) {
1237 device->keyMap.keyCharacterMap->combine(*map);
1238 device->keyMap.keyCharacterMapFile = device->keyMap.keyCharacterMap->getLoadFileName();
1239 return true;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001240 }
1241 return false;
1242}
1243
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001244static std::string generateDescriptor(InputDeviceIdentifier& identifier) {
1245 std::string rawDescriptor;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001246 rawDescriptor += StringPrintf(":%04x:%04x:", identifier.vendor, identifier.product);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001247 // TODO add handling for USB devices to not uniqueify kbs that show up twice
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001248 if (!identifier.uniqueId.empty()) {
1249 rawDescriptor += "uniqueId:";
1250 rawDescriptor += identifier.uniqueId;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001251 } else if (identifier.nonce != 0) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001252 rawDescriptor += StringPrintf("nonce:%04x", identifier.nonce);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001253 }
1254
1255 if (identifier.vendor == 0 && identifier.product == 0) {
1256 // If we don't know the vendor and product id, then the device is probably
1257 // built-in so we need to rely on other information to uniquely identify
1258 // the input device. Usually we try to avoid relying on the device name or
1259 // location but for built-in input device, they are unlikely to ever change.
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001260 if (!identifier.name.empty()) {
1261 rawDescriptor += "name:";
1262 rawDescriptor += identifier.name;
1263 } else if (!identifier.location.empty()) {
1264 rawDescriptor += "location:";
1265 rawDescriptor += identifier.location;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001266 }
1267 }
1268 identifier.descriptor = sha1(rawDescriptor);
1269 return rawDescriptor;
1270}
1271
1272void EventHub::assignDescriptorLocked(InputDeviceIdentifier& identifier) {
1273 // Compute a device descriptor that uniquely identifies the device.
1274 // The descriptor is assumed to be a stable identifier. Its value should not
1275 // change between reboots, reconnections, firmware updates or new releases
1276 // of Android. In practice we sometimes get devices that cannot be uniquely
1277 // identified. In this case we enforce uniqueness between connected devices.
1278 // Ideally, we also want the descriptor to be short and relatively opaque.
1279
1280 identifier.nonce = 0;
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001281 std::string rawDescriptor = generateDescriptor(identifier);
1282 if (identifier.uniqueId.empty()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001283 // If it didn't have a unique id check for conflicts and enforce
1284 // uniqueness if necessary.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001285 while (getDeviceByDescriptorLocked(identifier.descriptor) != nullptr) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001286 identifier.nonce++;
1287 rawDescriptor = generateDescriptor(identifier);
1288 }
1289 }
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001290 ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.c_str(),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001291 identifier.descriptor.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001292}
1293
Nathaniel R. Lewiscacd69a2019-08-12 22:07:00 +00001294void EventHub::vibrate(int32_t deviceId, const VibrationElement& element) {
Chris Ye87143712020-11-10 05:05:58 +00001295 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001296 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001297 if (device != nullptr && device->hasValidFd()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001298 ff_effect effect;
1299 memset(&effect, 0, sizeof(effect));
1300 effect.type = FF_RUMBLE;
1301 effect.id = device->ffEffectId;
Nathaniel R. Lewiscacd69a2019-08-12 22:07:00 +00001302 // evdev FF_RUMBLE effect only supports two channels of vibration.
Chris Ye6393a262020-08-04 19:41:36 -07001303 effect.u.rumble.strong_magnitude = element.getMagnitude(FF_STRONG_MAGNITUDE_CHANNEL_IDX);
1304 effect.u.rumble.weak_magnitude = element.getMagnitude(FF_WEAK_MAGNITUDE_CHANNEL_IDX);
Nathaniel R. Lewiscacd69a2019-08-12 22:07:00 +00001305 effect.replay.length = element.duration.count();
Michael Wrightd02c5b62014-02-10 15:10:22 -08001306 effect.replay.delay = 0;
1307 if (ioctl(device->fd, EVIOCSFF, &effect)) {
1308 ALOGW("Could not upload force feedback effect to device %s due to error %d.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001309 device->identifier.name.c_str(), errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001310 return;
1311 }
1312 device->ffEffectId = effect.id;
1313
1314 struct input_event ev;
1315 ev.time.tv_sec = 0;
1316 ev.time.tv_usec = 0;
1317 ev.type = EV_FF;
1318 ev.code = device->ffEffectId;
1319 ev.value = 1;
1320 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
1321 ALOGW("Could not start force feedback effect on device %s due to error %d.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001322 device->identifier.name.c_str(), errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001323 return;
1324 }
1325 device->ffEffectPlaying = true;
1326 }
1327}
1328
1329void EventHub::cancelVibrate(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00001330 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001331 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001332 if (device != nullptr && device->hasValidFd()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001333 if (device->ffEffectPlaying) {
1334 device->ffEffectPlaying = false;
1335
1336 struct input_event ev;
1337 ev.time.tv_sec = 0;
1338 ev.time.tv_usec = 0;
1339 ev.type = EV_FF;
1340 ev.code = device->ffEffectId;
1341 ev.value = 0;
1342 if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
1343 ALOGW("Could not stop force feedback effect on device %s due to error %d.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001344 device->identifier.name.c_str(), errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001345 return;
1346 }
1347 }
1348 }
1349}
1350
Chris Ye87143712020-11-10 05:05:58 +00001351std::vector<int32_t> EventHub::getVibratorIds(int32_t deviceId) {
1352 std::scoped_lock _l(mLock);
1353 std::vector<int32_t> vibrators;
1354 Device* device = getDeviceLocked(deviceId);
1355 if (device != nullptr && device->hasValidFd() &&
1356 device->classes.test(InputDeviceClass::VIBRATOR)) {
1357 vibrators.push_back(FF_STRONG_MAGNITUDE_CHANNEL_IDX);
1358 vibrators.push_back(FF_WEAK_MAGNITUDE_CHANNEL_IDX);
1359 }
1360 return vibrators;
1361}
1362
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001363EventHub::Device* EventHub::getDeviceByDescriptorLocked(const std::string& descriptor) const {
Chris Ye989bb932020-07-04 16:18:59 -07001364 for (const auto& [id, device] : mDevices) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001365 if (descriptor == device->identifier.descriptor) {
Chris Ye989bb932020-07-04 16:18:59 -07001366 return device.get();
Michael Wrightd02c5b62014-02-10 15:10:22 -08001367 }
1368 }
Yi Kong9b14ac62018-07-17 13:48:38 -07001369 return nullptr;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001370}
1371
1372EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const {
Prabir Pradhancae4b3a2019-02-05 18:51:32 -08001373 if (deviceId == ReservedInputDeviceId::BUILT_IN_KEYBOARD_ID) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001374 deviceId = mBuiltInKeyboardId;
1375 }
Chris Ye989bb932020-07-04 16:18:59 -07001376 const auto& it = mDevices.find(deviceId);
1377 return it != mDevices.end() ? it->second.get() : nullptr;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001378}
1379
Chris Ye8594e192020-07-14 10:34:06 -07001380EventHub::Device* EventHub::getDeviceByPathLocked(const std::string& devicePath) const {
Chris Ye989bb932020-07-04 16:18:59 -07001381 for (const auto& [id, device] : mDevices) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001382 if (device->path == devicePath) {
Chris Ye989bb932020-07-04 16:18:59 -07001383 return device.get();
Michael Wrightd02c5b62014-02-10 15:10:22 -08001384 }
1385 }
Yi Kong9b14ac62018-07-17 13:48:38 -07001386 return nullptr;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001387}
1388
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001389/**
1390 * The file descriptor could be either input device, or a video device (associated with a
1391 * specific input device). Check both cases here, and return the device that this event
1392 * belongs to. Caller can compare the fd's once more to determine event type.
1393 * Looks through all input devices, and only attached video devices. Unattached video
1394 * devices are ignored.
1395 */
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001396EventHub::Device* EventHub::getDeviceByFdLocked(int fd) const {
Chris Ye989bb932020-07-04 16:18:59 -07001397 for (const auto& [id, device] : mDevices) {
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001398 if (device->fd == fd) {
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001399 // This is an input device event
Chris Ye989bb932020-07-04 16:18:59 -07001400 return device.get();
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001401 }
1402 if (device->videoDevice && device->videoDevice->getFd() == fd) {
1403 // This is a video device event
Chris Ye989bb932020-07-04 16:18:59 -07001404 return device.get();
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001405 }
1406 }
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001407 // We do not check mUnattachedVideoDevices here because they should not participate in epoll,
1408 // and therefore should never be looked up by fd.
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001409 return nullptr;
1410}
1411
Chris Yee2b1e5c2021-03-10 22:45:12 -08001412std::optional<int32_t> EventHub::getBatteryCapacity(int32_t deviceId, int32_t batteryId) const {
Kim Low03ea0352020-11-06 12:45:07 -08001413 std::scoped_lock _l(mLock);
Kim Low03ea0352020-11-06 12:45:07 -08001414
Chris Yee2b1e5c2021-03-10 22:45:12 -08001415 const auto infos = getBatteryInfoLocked(deviceId);
1416 auto it = infos.find(batteryId);
1417 if (it == infos.end()) {
Kim Low03ea0352020-11-06 12:45:07 -08001418 return std::nullopt;
1419 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001420 std::string buffer;
Kim Low03ea0352020-11-06 12:45:07 -08001421
1422 // Some devices report battery capacity as an integer through the "capacity" file
Chris Yee2b1e5c2021-03-10 22:45:12 -08001423 if (base::ReadFileToString(it->second.path / BATTERY_NODES.at(InputBatteryClass::CAPACITY),
1424 &buffer)) {
Chris Yed1936772021-02-22 10:30:40 -08001425 return std::stoi(base::Trim(buffer));
Kim Low03ea0352020-11-06 12:45:07 -08001426 }
1427
1428 // Other devices report capacity as an enum value POWER_SUPPLY_CAPACITY_LEVEL_XXX
1429 // These values are taken from kernel source code include/linux/power_supply.h
Chris Yee2b1e5c2021-03-10 22:45:12 -08001430 if (base::ReadFileToString(it->second.path /
1431 BATTERY_NODES.at(InputBatteryClass::CAPACITY_LEVEL),
1432 &buffer)) {
Chris Yed1936772021-02-22 10:30:40 -08001433 // Remove any white space such as trailing new line
Chris Yee2b1e5c2021-03-10 22:45:12 -08001434 const auto levelIt = BATTERY_LEVEL.find(base::Trim(buffer));
1435 if (levelIt != BATTERY_LEVEL.end()) {
1436 return levelIt->second;
Kim Low03ea0352020-11-06 12:45:07 -08001437 }
1438 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001439
Kim Low03ea0352020-11-06 12:45:07 -08001440 return std::nullopt;
1441}
1442
Chris Yee2b1e5c2021-03-10 22:45:12 -08001443std::optional<int32_t> EventHub::getBatteryStatus(int32_t deviceId, int32_t batteryId) const {
Kim Low03ea0352020-11-06 12:45:07 -08001444 std::scoped_lock _l(mLock);
Chris Yee2b1e5c2021-03-10 22:45:12 -08001445 const auto infos = getBatteryInfoLocked(deviceId);
1446 auto it = infos.find(batteryId);
1447 if (it == infos.end()) {
Kim Low03ea0352020-11-06 12:45:07 -08001448 return std::nullopt;
1449 }
Chris Yee2b1e5c2021-03-10 22:45:12 -08001450 std::string buffer;
Kim Low03ea0352020-11-06 12:45:07 -08001451
Chris Yee2b1e5c2021-03-10 22:45:12 -08001452 if (!base::ReadFileToString(it->second.path / BATTERY_NODES.at(InputBatteryClass::STATUS),
1453 &buffer)) {
Kim Low03ea0352020-11-06 12:45:07 -08001454 ALOGE("Failed to read sysfs battery info: %s", strerror(errno));
1455 return std::nullopt;
1456 }
1457
Chris Yed1936772021-02-22 10:30:40 -08001458 // Remove white space like trailing new line
Chris Yee2b1e5c2021-03-10 22:45:12 -08001459 const auto statusIt = BATTERY_STATUS.find(base::Trim(buffer));
1460 if (statusIt != BATTERY_STATUS.end()) {
1461 return statusIt->second;
Kim Low03ea0352020-11-06 12:45:07 -08001462 }
1463
1464 return std::nullopt;
1465}
1466
Michael Wrightd02c5b62014-02-10 15:10:22 -08001467size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) {
1468 ALOG_ASSERT(bufferSize >= 1);
1469
Chris Ye87143712020-11-10 05:05:58 +00001470 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001471
1472 struct input_event readBuffer[bufferSize];
1473
1474 RawEvent* event = buffer;
1475 size_t capacity = bufferSize;
1476 bool awoken = false;
1477 for (;;) {
1478 nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
1479
1480 // Reopen input devices if needed.
1481 if (mNeedToReopenDevices) {
1482 mNeedToReopenDevices = false;
1483
1484 ALOGI("Reopening all input devices due to a configuration change.");
1485
1486 closeAllDevicesLocked();
1487 mNeedToScanDevices = true;
1488 break; // return to the caller before we actually rescan
1489 }
1490
1491 // Report any devices that had last been added/removed.
Chris Ye989bb932020-07-04 16:18:59 -07001492 for (auto it = mClosingDevices.begin(); it != mClosingDevices.end();) {
1493 std::unique_ptr<Device> device = std::move(*it);
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001494 ALOGV("Reporting device closed: id=%d, name=%s\n", device->id, device->path.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001495 event->when = now;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001496 event->deviceId = (device->id == mBuiltInKeyboardId)
1497 ? ReservedInputDeviceId::BUILT_IN_KEYBOARD_ID
1498 : device->id;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001499 event->type = DEVICE_REMOVED;
1500 event += 1;
Chris Ye989bb932020-07-04 16:18:59 -07001501 it = mClosingDevices.erase(it);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001502 mNeedToSendFinishedDeviceScan = true;
1503 if (--capacity == 0) {
1504 break;
1505 }
1506 }
1507
1508 if (mNeedToScanDevices) {
1509 mNeedToScanDevices = false;
1510 scanDevicesLocked();
1511 mNeedToSendFinishedDeviceScan = true;
1512 }
1513
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05001514 while (!mOpeningDevices.empty()) {
1515 std::unique_ptr<Device> device = std::move(*mOpeningDevices.rbegin());
1516 mOpeningDevices.pop_back();
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001517 ALOGV("Reporting device opened: id=%d, name=%s\n", device->id, device->path.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001518 event->when = now;
1519 event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
1520 event->type = DEVICE_ADDED;
1521 event += 1;
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05001522
1523 // Try to find a matching video device by comparing device names
1524 for (auto it = mUnattachedVideoDevices.begin(); it != mUnattachedVideoDevices.end();
1525 it++) {
1526 std::unique_ptr<TouchVideoDevice>& videoDevice = *it;
Chris Yed3fef462021-03-07 17:10:08 -08001527 if (tryAddVideoDeviceLocked(*device, videoDevice)) {
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05001528 // videoDevice was transferred to 'device'
1529 it = mUnattachedVideoDevices.erase(it);
1530 break;
1531 }
1532 }
1533
1534 auto [dev_it, inserted] = mDevices.insert_or_assign(device->id, std::move(device));
1535 if (!inserted) {
Chris Ye989bb932020-07-04 16:18:59 -07001536 ALOGW("Device id %d exists, replaced.", device->id);
1537 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08001538 mNeedToSendFinishedDeviceScan = true;
1539 if (--capacity == 0) {
1540 break;
1541 }
1542 }
1543
1544 if (mNeedToSendFinishedDeviceScan) {
1545 mNeedToSendFinishedDeviceScan = false;
1546 event->when = now;
1547 event->type = FINISHED_DEVICE_SCAN;
1548 event += 1;
1549 if (--capacity == 0) {
1550 break;
1551 }
1552 }
1553
1554 // Grab the next input event.
1555 bool deviceChanged = false;
1556 while (mPendingEventIndex < mPendingEventCount) {
1557 const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++];
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001558 if (eventItem.data.fd == mINotifyFd) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001559 if (eventItem.events & EPOLLIN) {
1560 mPendingINotify = true;
1561 } else {
1562 ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events);
1563 }
1564 continue;
1565 }
1566
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001567 if (eventItem.data.fd == mWakeReadPipeFd) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001568 if (eventItem.events & EPOLLIN) {
1569 ALOGV("awoken after wake()");
1570 awoken = true;
Siarhei Vishniakoub4d960d2019-10-03 15:38:44 -05001571 char wakeReadBuffer[16];
Michael Wrightd02c5b62014-02-10 15:10:22 -08001572 ssize_t nRead;
1573 do {
Siarhei Vishniakoub4d960d2019-10-03 15:38:44 -05001574 nRead = read(mWakeReadPipeFd, wakeReadBuffer, sizeof(wakeReadBuffer));
1575 } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(wakeReadBuffer));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001576 } else {
1577 ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001578 eventItem.events);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001579 }
1580 continue;
1581 }
1582
Siarhei Vishniakou4bc561c2018-11-02 17:41:58 -07001583 Device* device = getDeviceByFdLocked(eventItem.data.fd);
Chris Ye989bb932020-07-04 16:18:59 -07001584 if (device == nullptr) {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001585 ALOGE("Received unexpected epoll event 0x%08x for unknown fd %d.", eventItem.events,
1586 eventItem.data.fd);
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001587 ALOG_ASSERT(!DEBUG);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001588 continue;
1589 }
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001590 if (device->videoDevice && eventItem.data.fd == device->videoDevice->getFd()) {
1591 if (eventItem.events & EPOLLIN) {
1592 size_t numFrames = device->videoDevice->readAndQueueFrames();
1593 if (numFrames == 0) {
1594 ALOGE("Received epoll event for video device %s, but could not read frame",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001595 device->videoDevice->getName().c_str());
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001596 }
1597 } else if (eventItem.events & EPOLLHUP) {
1598 // TODO(b/121395353) - consider adding EPOLLRDHUP
1599 ALOGI("Removing video device %s due to epoll hang-up event.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001600 device->videoDevice->getName().c_str());
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001601 unregisterVideoDeviceFromEpollLocked(*device->videoDevice);
1602 device->videoDevice = nullptr;
1603 } else {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001604 ALOGW("Received unexpected epoll event 0x%08x for device %s.", eventItem.events,
1605 device->videoDevice->getName().c_str());
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001606 ALOG_ASSERT(!DEBUG);
1607 }
1608 continue;
1609 }
1610 // This must be an input event
Michael Wrightd02c5b62014-02-10 15:10:22 -08001611 if (eventItem.events & EPOLLIN) {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001612 int32_t readSize =
1613 read(device->fd, readBuffer, sizeof(struct input_event) * capacity);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001614 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) {
1615 // Device was removed before INotify noticed.
Mark Salyzyn5aa26b22014-06-10 13:07:44 -07001616 ALOGW("could not get event, removed? (fd: %d size: %" PRId32
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001617 " bufferSize: %zu capacity: %zu errno: %d)\n",
1618 device->fd, readSize, bufferSize, capacity, errno);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001619 deviceChanged = true;
Chris Ye989bb932020-07-04 16:18:59 -07001620 closeDeviceLocked(*device);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001621 } else if (readSize < 0) {
1622 if (errno != EAGAIN && errno != EINTR) {
1623 ALOGW("could not get event (errno=%d)", errno);
1624 }
1625 } else if ((readSize % sizeof(struct input_event)) != 0) {
1626 ALOGE("could not get event (wrong size: %d)", readSize);
1627 } else {
1628 int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
1629
1630 size_t count = size_t(readSize) / sizeof(struct input_event);
1631 for (size_t i = 0; i < count; i++) {
1632 struct input_event& iev = readBuffer[i];
Siarhei Vishniakou592bac22018-11-08 19:42:38 -08001633 event->when = processEventTimestamp(iev);
Siarhei Vishniakou58ba3d12021-02-11 01:31:07 +00001634 event->readTime = systemTime(SYSTEM_TIME_MONOTONIC);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001635 event->deviceId = deviceId;
1636 event->type = iev.type;
1637 event->code = iev.code;
1638 event->value = iev.value;
1639 event += 1;
1640 capacity -= 1;
1641 }
1642 if (capacity == 0) {
1643 // The result buffer is full. Reset the pending event index
1644 // so we will try to read the device again on the next iteration.
1645 mPendingEventIndex -= 1;
1646 break;
1647 }
1648 }
1649 } else if (eventItem.events & EPOLLHUP) {
1650 ALOGI("Removing device %s due to epoll hang-up event.",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001651 device->identifier.name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001652 deviceChanged = true;
Chris Ye989bb932020-07-04 16:18:59 -07001653 closeDeviceLocked(*device);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001654 } else {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001655 ALOGW("Received unexpected epoll event 0x%08x for device %s.", eventItem.events,
1656 device->identifier.name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001657 }
1658 }
1659
1660 // readNotify() will modify the list of devices so this must be done after
1661 // processing all other events to ensure that we read all remaining events
1662 // before closing the devices.
1663 if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) {
1664 mPendingINotify = false;
1665 readNotifyLocked();
1666 deviceChanged = true;
1667 }
1668
1669 // Report added or removed devices immediately.
1670 if (deviceChanged) {
1671 continue;
1672 }
1673
1674 // Return now if we have collected any events or if we were explicitly awoken.
1675 if (event != buffer || awoken) {
1676 break;
1677 }
1678
Siarhei Vishniakou4b5a87f2019-09-24 13:03:58 +01001679 // Poll for events.
1680 // When a device driver has pending (unread) events, it acquires
1681 // a kernel wake lock. Once the last pending event has been read, the device
1682 // driver will release the kernel wake lock, but the epoll will hold the wakelock,
1683 // since we are using EPOLLWAKEUP. The wakelock is released by the epoll when epoll_wait
1684 // is called again for the same fd that produced the event.
1685 // Thus the system can only sleep if there are no events pending or
1686 // currently being processed.
Michael Wrightd02c5b62014-02-10 15:10:22 -08001687 //
1688 // The timeout is advisory only. If the device is asleep, it will not wake just to
1689 // service the timeout.
1690 mPendingEventIndex = 0;
1691
Siarhei Vishniakou4b5a87f2019-09-24 13:03:58 +01001692 mLock.unlock(); // release lock before poll
Michael Wrightd02c5b62014-02-10 15:10:22 -08001693
1694 int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis);
1695
Siarhei Vishniakou4b5a87f2019-09-24 13:03:58 +01001696 mLock.lock(); // reacquire lock after poll
Michael Wrightd02c5b62014-02-10 15:10:22 -08001697
1698 if (pollResult == 0) {
1699 // Timed out.
1700 mPendingEventCount = 0;
1701 break;
1702 }
1703
1704 if (pollResult < 0) {
1705 // An error occurred.
1706 mPendingEventCount = 0;
1707
1708 // Sleep after errors to avoid locking up the system.
1709 // Hopefully the error is transient.
1710 if (errno != EINTR) {
1711 ALOGW("poll failed (errno=%d)\n", errno);
1712 usleep(100000);
1713 }
1714 } else {
1715 // Some events occurred.
1716 mPendingEventCount = size_t(pollResult);
1717 }
1718 }
1719
1720 // All done, return the number of events we read.
1721 return event - buffer;
1722}
1723
Siarhei Vishniakouadd89292018-12-13 19:23:36 -08001724std::vector<TouchVideoFrame> EventHub::getVideoFrames(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00001725 std::scoped_lock _l(mLock);
Siarhei Vishniakouadd89292018-12-13 19:23:36 -08001726
1727 Device* device = getDeviceLocked(deviceId);
Chris Ye66fbac32020-07-06 20:36:43 -07001728 if (device == nullptr || !device->videoDevice) {
Siarhei Vishniakouadd89292018-12-13 19:23:36 -08001729 return {};
1730 }
1731 return device->videoDevice->consumeFrames();
1732}
1733
Michael Wrightd02c5b62014-02-10 15:10:22 -08001734void EventHub::wake() {
1735 ALOGV("wake() called");
1736
1737 ssize_t nWrite;
1738 do {
1739 nWrite = write(mWakeWritePipeFd, "W", 1);
1740 } while (nWrite == -1 && errno == EINTR);
1741
1742 if (nWrite != 1 && errno != EAGAIN) {
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08001743 ALOGW("Could not write wake signal: %s", strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001744 }
1745}
1746
1747void EventHub::scanDevicesLocked() {
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08001748 status_t result = scanDirLocked(DEVICE_PATH);
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001749 if (result < 0) {
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08001750 ALOGE("scan dir failed for %s", DEVICE_PATH);
1751 }
Philip Quinn39b81682019-01-09 22:20:39 -08001752 if (isV4lScanningEnabled()) {
1753 result = scanVideoDirLocked(VIDEO_DEVICE_PATH);
1754 if (result != OK) {
1755 ALOGE("scan video dir failed for %s", VIDEO_DEVICE_PATH);
1756 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08001757 }
Chris Ye989bb932020-07-04 16:18:59 -07001758 if (mDevices.find(ReservedInputDeviceId::VIRTUAL_KEYBOARD_ID) == mDevices.end()) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08001759 createVirtualKeyboardLocked();
1760 }
1761}
1762
1763// ----------------------------------------------------------------------------
1764
Michael Wrightd02c5b62014-02-10 15:10:22 -08001765static const int32_t GAMEPAD_KEYCODES[] = {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001766 AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C, //
1767 AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z, //
1768 AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1, //
1769 AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2, //
1770 AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR, //
1771 AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE, //
Michael Wrightd02c5b62014-02-10 15:10:22 -08001772};
1773
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001774status_t EventHub::registerFdForEpoll(int fd) {
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001775 // TODO(b/121395353) - consider adding EPOLLRDHUP
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001776 struct epoll_event eventItem = {};
1777 eventItem.events = EPOLLIN | EPOLLWAKEUP;
1778 eventItem.data.fd = fd;
1779 if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) {
1780 ALOGE("Could not add fd to epoll instance: %s", strerror(errno));
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07001781 return -errno;
1782 }
1783 return OK;
1784}
1785
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001786status_t EventHub::unregisterFdFromEpoll(int fd) {
1787 if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, fd, nullptr)) {
1788 ALOGW("Could not remove fd from epoll instance: %s", strerror(errno));
1789 return -errno;
1790 }
1791 return OK;
1792}
1793
Chris Ye989bb932020-07-04 16:18:59 -07001794status_t EventHub::registerDeviceForEpollLocked(Device& device) {
1795 status_t result = registerFdForEpoll(device.fd);
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001796 if (result != OK) {
Chris Ye989bb932020-07-04 16:18:59 -07001797 ALOGE("Could not add input device fd to epoll for device %" PRId32, device.id);
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001798 return result;
1799 }
Chris Ye989bb932020-07-04 16:18:59 -07001800 if (device.videoDevice) {
1801 registerVideoDeviceForEpollLocked(*device.videoDevice);
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001802 }
1803 return result;
1804}
1805
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001806void EventHub::registerVideoDeviceForEpollLocked(const TouchVideoDevice& videoDevice) {
1807 status_t result = registerFdForEpoll(videoDevice.getFd());
1808 if (result != OK) {
1809 ALOGE("Could not add video device %s to epoll", videoDevice.getName().c_str());
1810 }
1811}
1812
Chris Ye989bb932020-07-04 16:18:59 -07001813status_t EventHub::unregisterDeviceFromEpollLocked(Device& device) {
1814 if (device.hasValidFd()) {
1815 status_t result = unregisterFdFromEpoll(device.fd);
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001816 if (result != OK) {
Chris Ye989bb932020-07-04 16:18:59 -07001817 ALOGW("Could not remove input device fd from epoll for device %" PRId32, device.id);
Siarhei Vishniakou25920312018-12-12 15:24:44 -08001818 return result;
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07001819 }
1820 }
Chris Ye989bb932020-07-04 16:18:59 -07001821 if (device.videoDevice) {
1822 unregisterVideoDeviceFromEpollLocked(*device.videoDevice);
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001823 }
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07001824 return OK;
1825}
1826
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001827void EventHub::unregisterVideoDeviceFromEpollLocked(const TouchVideoDevice& videoDevice) {
1828 if (videoDevice.hasValidFd()) {
1829 status_t result = unregisterFdFromEpoll(videoDevice.getFd());
1830 if (result != OK) {
1831 ALOGW("Could not remove video device fd from epoll for device: %s",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001832 videoDevice.getName().c_str());
Siarhei Vishniakou12598682018-11-02 17:19:19 -07001833 }
1834 }
1835}
1836
Chris Yed3fef462021-03-07 17:10:08 -08001837void EventHub::reportDeviceAddedForStatisticsLocked(const InputDeviceIdentifier& identifier,
1838 Flags<InputDeviceClass> classes) {
1839 android::util::stats_write(android::util::INPUTDEVICE_REGISTERED, identifier.name.c_str(),
1840 identifier.vendor, identifier.product, identifier.version,
1841 identifier.bus, identifier.uniqueId.c_str(), classes.get());
1842}
1843
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001844void EventHub::openDeviceLocked(const std::string& devicePath) {
1845 // If an input device happens to register around the time when EventHub's constructor runs, it
1846 // is possible that the same input event node (for example, /dev/input/event3) will be noticed
1847 // in both 'inotify' callback and also in the 'scanDirLocked' pass. To prevent duplicate devices
1848 // from getting registered, ensure that this path is not already covered by an existing device.
1849 for (const auto& [deviceId, device] : mDevices) {
1850 if (device->path == devicePath) {
1851 return; // device was already registered
1852 }
1853 }
1854
Michael Wrightd02c5b62014-02-10 15:10:22 -08001855 char buffer[80];
1856
Chris Ye8594e192020-07-14 10:34:06 -07001857 ALOGV("Opening device: %s", devicePath.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001858
Chris Ye8594e192020-07-14 10:34:06 -07001859 int fd = open(devicePath.c_str(), O_RDWR | O_CLOEXEC | O_NONBLOCK);
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001860 if (fd < 0) {
Chris Ye8594e192020-07-14 10:34:06 -07001861 ALOGE("could not open %s, %s\n", devicePath.c_str(), strerror(errno));
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001862 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001863 }
1864
1865 InputDeviceIdentifier identifier;
1866
1867 // Get device name.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001868 if (ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) {
Chris Ye8594e192020-07-14 10:34:06 -07001869 ALOGE("Could not get device name for %s: %s", devicePath.c_str(), strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001870 } else {
1871 buffer[sizeof(buffer) - 1] = '\0';
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001872 identifier.name = buffer;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001873 }
1874
1875 // Check to see if the device is on our excluded list
1876 for (size_t i = 0; i < mExcludedDevices.size(); i++) {
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001877 const std::string& item = mExcludedDevices[i];
Michael Wrightd02c5b62014-02-10 15:10:22 -08001878 if (identifier.name == item) {
Chris Ye8594e192020-07-14 10:34:06 -07001879 ALOGI("ignoring event id %s driver %s\n", devicePath.c_str(), item.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001880 close(fd);
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001881 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001882 }
1883 }
1884
1885 // Get device driver version.
1886 int driverVersion;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001887 if (ioctl(fd, EVIOCGVERSION, &driverVersion)) {
Chris Ye8594e192020-07-14 10:34:06 -07001888 ALOGE("could not get driver version for %s, %s\n", devicePath.c_str(), strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001889 close(fd);
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001890 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001891 }
1892
1893 // Get device identifier.
1894 struct input_id inputId;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001895 if (ioctl(fd, EVIOCGID, &inputId)) {
Chris Ye8594e192020-07-14 10:34:06 -07001896 ALOGE("could not get device input id for %s, %s\n", devicePath.c_str(), strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001897 close(fd);
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00001898 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001899 }
1900 identifier.bus = inputId.bustype;
1901 identifier.product = inputId.product;
1902 identifier.vendor = inputId.vendor;
1903 identifier.version = inputId.version;
1904
1905 // Get device physical location.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001906 if (ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) {
1907 // fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001908 } else {
1909 buffer[sizeof(buffer) - 1] = '\0';
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001910 identifier.location = buffer;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001911 }
1912
1913 // Get device unique id.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001914 if (ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) {
1915 // fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno));
Michael Wrightd02c5b62014-02-10 15:10:22 -08001916 } else {
1917 buffer[sizeof(buffer) - 1] = '\0';
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001918 identifier.uniqueId = buffer;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001919 }
1920
1921 // Fill in the descriptor.
1922 assignDescriptorLocked(identifier);
1923
Michael Wrightd02c5b62014-02-10 15:10:22 -08001924 // Allocate device. (The device object takes ownership of the fd at this point.)
1925 int32_t deviceId = mNextDeviceId++;
Chris Ye989bb932020-07-04 16:18:59 -07001926 std::unique_ptr<Device> device = std::make_unique<Device>(fd, deviceId, devicePath, identifier);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001927
Chris Ye8594e192020-07-14 10:34:06 -07001928 ALOGV("add device %d: %s\n", deviceId, devicePath.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08001929 ALOGV(" bus: %04x\n"
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001930 " vendor %04x\n"
1931 " product %04x\n"
1932 " version %04x\n",
1933 identifier.bus, identifier.vendor, identifier.product, identifier.version);
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01001934 ALOGV(" name: \"%s\"\n", identifier.name.c_str());
1935 ALOGV(" location: \"%s\"\n", identifier.location.c_str());
1936 ALOGV(" unique id: \"%s\"\n", identifier.uniqueId.c_str());
1937 ALOGV(" descriptor: \"%s\"\n", identifier.descriptor.c_str());
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001938 ALOGV(" driver: v%d.%d.%d\n", driverVersion >> 16, (driverVersion >> 8) & 0xff,
1939 driverVersion & 0xff);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001940
1941 // Load the configuration file for the device.
Chris Ye989bb932020-07-04 16:18:59 -07001942 device->loadConfigurationLocked();
Michael Wrightd02c5b62014-02-10 15:10:22 -08001943
Chris Yee2b1e5c2021-03-10 22:45:12 -08001944 bool hasBattery = false;
1945 bool hasLights = false;
1946 // Check the sysfs root path
1947 std::optional<std::filesystem::path> sysfsRootPath = getSysfsRootPath(devicePath.c_str());
1948 if (sysfsRootPath.has_value()) {
1949 std::shared_ptr<MiscDevice> miscDevice;
1950 auto it = mMiscDevices.find(device->identifier.descriptor);
1951 if (it == mMiscDevices.end()) {
1952 miscDevice = std::make_shared<MiscDevice>(sysfsRootPath.value());
1953 } else {
1954 miscDevice = it->second;
1955 }
1956 hasBattery = miscDevice->configureBatteryLocked();
1957 hasLights = miscDevice->configureLightsLocked();
1958
1959 device->miscDevice = miscDevice;
1960 mMiscDevices.insert_or_assign(device->identifier.descriptor, std::move(miscDevice));
1961 }
Chris Ye3fdbfef2021-01-06 18:45:18 -08001962
Michael Wrightd02c5b62014-02-10 15:10:22 -08001963 // Figure out the kinds of events the device reports.
Chris Ye66fbac32020-07-06 20:36:43 -07001964 device->readDeviceBitMask(EVIOCGBIT(EV_KEY, 0), device->keyBitmask);
1965 device->readDeviceBitMask(EVIOCGBIT(EV_ABS, 0), device->absBitmask);
1966 device->readDeviceBitMask(EVIOCGBIT(EV_REL, 0), device->relBitmask);
1967 device->readDeviceBitMask(EVIOCGBIT(EV_SW, 0), device->swBitmask);
1968 device->readDeviceBitMask(EVIOCGBIT(EV_LED, 0), device->ledBitmask);
1969 device->readDeviceBitMask(EVIOCGBIT(EV_FF, 0), device->ffBitmask);
Chris Yef59a2f42020-10-16 12:55:26 -07001970 device->readDeviceBitMask(EVIOCGBIT(EV_MSC, 0), device->mscBitmask);
Chris Ye66fbac32020-07-06 20:36:43 -07001971 device->readDeviceBitMask(EVIOCGPROP(0), device->propBitmask);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001972
1973 // See if this is a keyboard. Ignore everything in the button range except for
1974 // joystick and gamepad buttons which are handled like keyboards for the most part.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001975 bool haveKeyboardKeys =
Chris Ye66fbac32020-07-06 20:36:43 -07001976 device->keyBitmask.any(0, BTN_MISC) || device->keyBitmask.any(BTN_WHEEL, KEY_MAX + 1);
1977 bool haveGamepadButtons = device->keyBitmask.any(BTN_MISC, BTN_MOUSE) ||
1978 device->keyBitmask.any(BTN_JOYSTICK, BTN_DIGI);
Michael Wrightd02c5b62014-02-10 15:10:22 -08001979 if (haveKeyboardKeys || haveGamepadButtons) {
Chris Ye1b0c7342020-07-28 21:57:03 -07001980 device->classes |= InputDeviceClass::KEYBOARD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001981 }
1982
1983 // See if this is a cursor device such as a trackball or mouse.
Chris Ye66fbac32020-07-06 20:36:43 -07001984 if (device->keyBitmask.test(BTN_MOUSE) && device->relBitmask.test(REL_X) &&
1985 device->relBitmask.test(REL_Y)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07001986 device->classes |= InputDeviceClass::CURSOR;
Michael Wrightd02c5b62014-02-10 15:10:22 -08001987 }
1988
Prashant Malani1941ff52015-08-11 18:29:28 -07001989 // See if this is a rotary encoder type device.
1990 String8 deviceType = String8();
1991 if (device->configuration &&
1992 device->configuration->tryGetProperty(String8("device.type"), deviceType)) {
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001993 if (!deviceType.compare(String8("rotaryEncoder"))) {
Chris Ye1b0c7342020-07-28 21:57:03 -07001994 device->classes |= InputDeviceClass::ROTARY_ENCODER;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07001995 }
Prashant Malani1941ff52015-08-11 18:29:28 -07001996 }
1997
Michael Wrightd02c5b62014-02-10 15:10:22 -08001998 // See if this is a touch pad.
1999 // Is this a new modern multi-touch driver?
Chris Ye66fbac32020-07-06 20:36:43 -07002000 if (device->absBitmask.test(ABS_MT_POSITION_X) && device->absBitmask.test(ABS_MT_POSITION_Y)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002001 // Some joysticks such as the PS3 controller report axes that conflict
2002 // with the ABS_MT range. Try to confirm that the device really is
2003 // a touch screen.
Chris Ye66fbac32020-07-06 20:36:43 -07002004 if (device->keyBitmask.test(BTN_TOUCH) || !haveGamepadButtons) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002005 device->classes |= (InputDeviceClass::TOUCH | InputDeviceClass::TOUCH_MT);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002006 }
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002007 // Is this an old style single-touch driver?
Chris Ye66fbac32020-07-06 20:36:43 -07002008 } else if (device->keyBitmask.test(BTN_TOUCH) && device->absBitmask.test(ABS_X) &&
2009 device->absBitmask.test(ABS_Y)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002010 device->classes |= InputDeviceClass::TOUCH;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002011 // Is this a BT stylus?
Chris Ye66fbac32020-07-06 20:36:43 -07002012 } else if ((device->absBitmask.test(ABS_PRESSURE) || device->keyBitmask.test(BTN_TOUCH)) &&
2013 !device->absBitmask.test(ABS_X) && !device->absBitmask.test(ABS_Y)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002014 device->classes |= InputDeviceClass::EXTERNAL_STYLUS;
Michael Wright842500e2015-03-13 17:32:02 -07002015 // Keyboard will try to claim some of the buttons but we really want to reserve those so we
2016 // can fuse it with the touch screen data, so just take them back. Note this means an
2017 // external stylus cannot also be a keyboard device.
Chris Ye1b0c7342020-07-28 21:57:03 -07002018 device->classes &= ~InputDeviceClass::KEYBOARD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002019 }
2020
2021 // See if this device is a joystick.
2022 // Assumes that joysticks always have gamepad buttons in order to distinguish them
2023 // from other devices such as accelerometers that also have absolute axes.
2024 if (haveGamepadButtons) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002025 auto assumedClasses = device->classes | InputDeviceClass::JOYSTICK;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002026 for (int i = 0; i <= ABS_MAX; i++) {
Chris Ye66fbac32020-07-06 20:36:43 -07002027 if (device->absBitmask.test(i) &&
Chris Ye1b0c7342020-07-28 21:57:03 -07002028 (getAbsAxisUsage(i, assumedClasses).test(InputDeviceClass::JOYSTICK))) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002029 device->classes = assumedClasses;
2030 break;
2031 }
2032 }
2033 }
2034
Chris Yef59a2f42020-10-16 12:55:26 -07002035 // Check whether this device is an accelerometer.
2036 if (device->propBitmask.test(INPUT_PROP_ACCELEROMETER)) {
2037 device->classes |= InputDeviceClass::SENSOR;
2038 }
2039
Michael Wrightd02c5b62014-02-10 15:10:22 -08002040 // Check whether this device has switches.
2041 for (int i = 0; i <= SW_MAX; i++) {
Chris Ye66fbac32020-07-06 20:36:43 -07002042 if (device->swBitmask.test(i)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002043 device->classes |= InputDeviceClass::SWITCH;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002044 break;
2045 }
2046 }
2047
2048 // Check whether this device supports the vibrator.
Chris Ye66fbac32020-07-06 20:36:43 -07002049 if (device->ffBitmask.test(FF_RUMBLE)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002050 device->classes |= InputDeviceClass::VIBRATOR;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002051 }
2052
2053 // Configure virtual keys.
Chris Ye1b0c7342020-07-28 21:57:03 -07002054 if ((device->classes.test(InputDeviceClass::TOUCH))) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002055 // Load the virtual keys for the touch screen, if any.
2056 // We do this now so that we can make sure to load the keymap if necessary.
Chris Ye989bb932020-07-04 16:18:59 -07002057 bool success = device->loadVirtualKeyMapLocked();
Siarhei Vishniakou3e78dec2019-02-20 16:21:46 -06002058 if (success) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002059 device->classes |= InputDeviceClass::KEYBOARD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002060 }
2061 }
2062
2063 // Load the key map.
Chris Yef59a2f42020-10-16 12:55:26 -07002064 // We need to do this for joysticks too because the key layout may specify axes, and for
2065 // sensor as well because the key layout may specify the axes to sensor data mapping.
Michael Wrightd02c5b62014-02-10 15:10:22 -08002066 status_t keyMapStatus = NAME_NOT_FOUND;
Chris Yef59a2f42020-10-16 12:55:26 -07002067 if (device->classes.any(InputDeviceClass::KEYBOARD | InputDeviceClass::JOYSTICK |
2068 InputDeviceClass::SENSOR)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002069 // Load the keymap for the device.
Chris Ye989bb932020-07-04 16:18:59 -07002070 keyMapStatus = device->loadKeyMapLocked();
Michael Wrightd02c5b62014-02-10 15:10:22 -08002071 }
2072
2073 // Configure the keyboard, gamepad or virtual keyboard.
Chris Ye1b0c7342020-07-28 21:57:03 -07002074 if (device->classes.test(InputDeviceClass::KEYBOARD)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002075 // Register the keyboard as a built-in keyboard if it is eligible.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002076 if (!keyMapStatus && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD &&
Siarhei Vishniakoud549b252020-08-11 11:25:26 -05002077 isEligibleBuiltInKeyboard(device->identifier, device->configuration.get(),
2078 &device->keyMap)) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002079 mBuiltInKeyboardId = device->id;
2080 }
2081
2082 // 'Q' key support = cheap test of whether this is an alpha-capable kbd
Chris Ye989bb932020-07-04 16:18:59 -07002083 if (device->hasKeycodeLocked(AKEYCODE_Q)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002084 device->classes |= InputDeviceClass::ALPHAKEY;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002085 }
2086
2087 // See if this device has a DPAD.
Chris Ye989bb932020-07-04 16:18:59 -07002088 if (device->hasKeycodeLocked(AKEYCODE_DPAD_UP) &&
2089 device->hasKeycodeLocked(AKEYCODE_DPAD_DOWN) &&
2090 device->hasKeycodeLocked(AKEYCODE_DPAD_LEFT) &&
2091 device->hasKeycodeLocked(AKEYCODE_DPAD_RIGHT) &&
2092 device->hasKeycodeLocked(AKEYCODE_DPAD_CENTER)) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002093 device->classes |= InputDeviceClass::DPAD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002094 }
2095
2096 // See if this device has a gamepad.
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002097 for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES) / sizeof(GAMEPAD_KEYCODES[0]); i++) {
Chris Ye989bb932020-07-04 16:18:59 -07002098 if (device->hasKeycodeLocked(GAMEPAD_KEYCODES[i])) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002099 device->classes |= InputDeviceClass::GAMEPAD;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002100 break;
2101 }
2102 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002103 }
2104
2105 // If the device isn't recognized as something we handle, don't monitor it.
Chris Ye1b0c7342020-07-28 21:57:03 -07002106 if (device->classes == Flags<InputDeviceClass>(0)) {
Chris Ye8594e192020-07-14 10:34:06 -07002107 ALOGV("Dropping device: id=%d, path='%s', name='%s'", deviceId, devicePath.c_str(),
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002108 device->identifier.name.c_str());
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00002109 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002110 }
2111
Chris Ye3fdbfef2021-01-06 18:45:18 -08002112 // Classify InputDeviceClass::BATTERY.
2113 if (hasBattery) {
2114 device->classes |= InputDeviceClass::BATTERY;
2115 }
Kim Low03ea0352020-11-06 12:45:07 -08002116
Chris Ye3fdbfef2021-01-06 18:45:18 -08002117 // Classify InputDeviceClass::LIGHT.
2118 if (hasLights) {
2119 device->classes |= InputDeviceClass::LIGHT;
Kim Low03ea0352020-11-06 12:45:07 -08002120 }
2121
Tim Kilbourn063ff532015-04-08 10:26:18 -07002122 // Determine whether the device has a mic.
Chris Ye989bb932020-07-04 16:18:59 -07002123 if (device->deviceHasMicLocked()) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002124 device->classes |= InputDeviceClass::MIC;
Tim Kilbourn063ff532015-04-08 10:26:18 -07002125 }
2126
Michael Wrightd02c5b62014-02-10 15:10:22 -08002127 // Determine whether the device is external or internal.
Chris Ye989bb932020-07-04 16:18:59 -07002128 if (device->isExternalDeviceLocked()) {
Chris Ye1b0c7342020-07-28 21:57:03 -07002129 device->classes |= InputDeviceClass::EXTERNAL;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002130 }
2131
Chris Ye1b0c7342020-07-28 21:57:03 -07002132 if (device->classes.any(InputDeviceClass::JOYSTICK | InputDeviceClass::DPAD) &&
2133 device->classes.test(InputDeviceClass::GAMEPAD)) {
Chris Ye989bb932020-07-04 16:18:59 -07002134 device->controllerNumber = getNextControllerNumberLocked(device->identifier.name);
2135 device->setLedForControllerLocked();
Michael Wrightd02c5b62014-02-10 15:10:22 -08002136 }
2137
Chris Ye989bb932020-07-04 16:18:59 -07002138 if (registerDeviceForEpollLocked(*device) != OK) {
Siarhei Vishniakoua4c502a2021-02-05 00:45:20 +00002139 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002140 }
2141
Chris Ye989bb932020-07-04 16:18:59 -07002142 device->configureFd();
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002143
Chris Ye1b0c7342020-07-28 21:57:03 -07002144 ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=%s, "
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002145 "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, ",
Chris Ye1b0c7342020-07-28 21:57:03 -07002146 deviceId, fd, devicePath.c_str(), device->identifier.name.c_str(),
2147 device->classes.string().c_str(), device->configurationFile.c_str(),
2148 device->keyMap.keyLayoutFile.c_str(), device->keyMap.keyCharacterMapFile.c_str(),
2149 toString(mBuiltInKeyboardId == deviceId));
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002150
Chris Ye989bb932020-07-04 16:18:59 -07002151 addDeviceLocked(std::move(device));
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002152}
2153
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002154void EventHub::openVideoDeviceLocked(const std::string& devicePath) {
2155 std::unique_ptr<TouchVideoDevice> videoDevice = TouchVideoDevice::create(devicePath);
2156 if (!videoDevice) {
2157 ALOGE("Could not create touch video device for %s. Ignoring", devicePath.c_str());
2158 return;
2159 }
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002160 // Transfer ownership of this video device to a matching input device
Chris Ye989bb932020-07-04 16:18:59 -07002161 for (const auto& [id, device] : mDevices) {
Chris Yed3fef462021-03-07 17:10:08 -08002162 if (tryAddVideoDeviceLocked(*device, videoDevice)) {
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05002163 return; // 'device' now owns 'videoDevice'
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002164 }
2165 }
2166
2167 // Couldn't find a matching input device, so just add it to a temporary holding queue.
2168 // A matching input device may appear later.
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002169 ALOGI("Adding video device %s to list of unattached video devices",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002170 videoDevice->getName().c_str());
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002171 mUnattachedVideoDevices.push_back(std::move(videoDevice));
2172}
2173
Chris Yed3fef462021-03-07 17:10:08 -08002174bool EventHub::tryAddVideoDeviceLocked(EventHub::Device& device,
2175 std::unique_ptr<TouchVideoDevice>& videoDevice) {
Siarhei Vishniakouf49608d2020-08-20 19:18:21 -05002176 if (videoDevice->getName() != device.identifier.name) {
2177 return false;
2178 }
2179 device.videoDevice = std::move(videoDevice);
2180 if (device.enabled) {
2181 registerVideoDeviceForEpollLocked(*device.videoDevice);
2182 }
2183 return true;
2184}
2185
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002186bool EventHub::isDeviceEnabled(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00002187 std::scoped_lock _l(mLock);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002188 Device* device = getDeviceLocked(deviceId);
Yi Kong9b14ac62018-07-17 13:48:38 -07002189 if (device == nullptr) {
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002190 ALOGE("Invalid device id=%" PRId32 " provided to %s", deviceId, __func__);
2191 return false;
2192 }
2193 return device->enabled;
2194}
Michael Wrightd02c5b62014-02-10 15:10:22 -08002195
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002196status_t EventHub::enableDevice(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00002197 std::scoped_lock _l(mLock);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002198 Device* device = getDeviceLocked(deviceId);
Yi Kong9b14ac62018-07-17 13:48:38 -07002199 if (device == nullptr) {
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002200 ALOGE("Invalid device id=%" PRId32 " provided to %s", deviceId, __func__);
2201 return BAD_VALUE;
2202 }
2203 if (device->enabled) {
2204 ALOGW("Duplicate call to %s, input device %" PRId32 " already enabled", __func__, deviceId);
2205 return OK;
2206 }
2207 status_t result = device->enable();
2208 if (result != OK) {
2209 ALOGE("Failed to enable device %" PRId32, deviceId);
2210 return result;
2211 }
2212
Chris Ye989bb932020-07-04 16:18:59 -07002213 device->configureFd();
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002214
Chris Ye989bb932020-07-04 16:18:59 -07002215 return registerDeviceForEpollLocked(*device);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002216}
2217
2218status_t EventHub::disableDevice(int32_t deviceId) {
Chris Ye87143712020-11-10 05:05:58 +00002219 std::scoped_lock _l(mLock);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002220 Device* device = getDeviceLocked(deviceId);
Yi Kong9b14ac62018-07-17 13:48:38 -07002221 if (device == nullptr) {
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002222 ALOGE("Invalid device id=%" PRId32 " provided to %s", deviceId, __func__);
2223 return BAD_VALUE;
2224 }
2225 if (!device->enabled) {
2226 ALOGW("Duplicate call to %s, input device already disabled", __func__);
2227 return OK;
2228 }
Chris Ye989bb932020-07-04 16:18:59 -07002229 unregisterDeviceFromEpollLocked(*device);
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002230 return device->disable();
Michael Wrightd02c5b62014-02-10 15:10:22 -08002231}
2232
2233void EventHub::createVirtualKeyboardLocked() {
2234 InputDeviceIdentifier identifier;
2235 identifier.name = "Virtual";
2236 identifier.uniqueId = "<virtual>";
2237 assignDescriptorLocked(identifier);
2238
Chris Ye989bb932020-07-04 16:18:59 -07002239 std::unique_ptr<Device> device =
2240 std::make_unique<Device>(-1, ReservedInputDeviceId::VIRTUAL_KEYBOARD_ID, "<virtual>",
2241 identifier);
Chris Ye1b0c7342020-07-28 21:57:03 -07002242 device->classes = InputDeviceClass::KEYBOARD | InputDeviceClass::ALPHAKEY |
2243 InputDeviceClass::DPAD | InputDeviceClass::VIRTUAL;
Chris Ye989bb932020-07-04 16:18:59 -07002244 device->loadKeyMapLocked();
2245 addDeviceLocked(std::move(device));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002246}
2247
Chris Ye989bb932020-07-04 16:18:59 -07002248void EventHub::addDeviceLocked(std::unique_ptr<Device> device) {
Chris Yed3fef462021-03-07 17:10:08 -08002249 reportDeviceAddedForStatisticsLocked(device->identifier, device->classes);
Chris Ye989bb932020-07-04 16:18:59 -07002250 mOpeningDevices.push_back(std::move(device));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002251}
2252
Chris Ye989bb932020-07-04 16:18:59 -07002253int32_t EventHub::getNextControllerNumberLocked(const std::string& name) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002254 if (mControllerNumbers.isFull()) {
2255 ALOGI("Maximum number of controllers reached, assigning controller number 0 to device %s",
Chris Ye989bb932020-07-04 16:18:59 -07002256 name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002257 return 0;
2258 }
2259 // Since the controller number 0 is reserved for non-controllers, translate all numbers up by
2260 // one
2261 return static_cast<int32_t>(mControllerNumbers.markFirstUnmarkedBit() + 1);
2262}
2263
Chris Ye989bb932020-07-04 16:18:59 -07002264void EventHub::releaseControllerNumberLocked(int32_t num) {
2265 if (num > 0) {
2266 mControllerNumbers.clearBit(static_cast<uint32_t>(num - 1));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002267 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002268}
2269
Chris Ye8594e192020-07-14 10:34:06 -07002270void EventHub::closeDeviceByPathLocked(const std::string& devicePath) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002271 Device* device = getDeviceByPathLocked(devicePath);
Chris Ye989bb932020-07-04 16:18:59 -07002272 if (device != nullptr) {
2273 closeDeviceLocked(*device);
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002274 return;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002275 }
Chris Ye8594e192020-07-14 10:34:06 -07002276 ALOGV("Remove device: %s not found, device may already have been removed.", devicePath.c_str());
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002277}
2278
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002279/**
2280 * Find the video device by filename, and close it.
2281 * The video device is closed by path during an inotify event, where we don't have the
2282 * additional context about the video device fd, or the associated input device.
2283 */
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002284void EventHub::closeVideoDeviceByPathLocked(const std::string& devicePath) {
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002285 // A video device may be owned by an existing input device, or it may be stored in
2286 // the mUnattachedVideoDevices queue. Check both locations.
Chris Ye989bb932020-07-04 16:18:59 -07002287 for (const auto& [id, device] : mDevices) {
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002288 if (device->videoDevice && device->videoDevice->getPath() == devicePath) {
Siarhei Vishniakou12598682018-11-02 17:19:19 -07002289 unregisterVideoDeviceFromEpollLocked(*device->videoDevice);
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002290 device->videoDevice = nullptr;
2291 return;
2292 }
2293 }
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002294 mUnattachedVideoDevices
2295 .erase(std::remove_if(mUnattachedVideoDevices.begin(), mUnattachedVideoDevices.end(),
2296 [&devicePath](
2297 const std::unique_ptr<TouchVideoDevice>& videoDevice) {
2298 return videoDevice->getPath() == devicePath;
2299 }),
2300 mUnattachedVideoDevices.end());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002301}
2302
2303void EventHub::closeAllDevicesLocked() {
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002304 mUnattachedVideoDevices.clear();
Siarhei Vishniakoud549b252020-08-11 11:25:26 -05002305 while (!mDevices.empty()) {
2306 closeDeviceLocked(*(mDevices.begin()->second));
Michael Wrightd02c5b62014-02-10 15:10:22 -08002307 }
2308}
2309
Chris Ye989bb932020-07-04 16:18:59 -07002310void EventHub::closeDeviceLocked(Device& device) {
2311 ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=%s", device.path.c_str(),
2312 device.identifier.name.c_str(), device.id, device.fd, device.classes.string().c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002313
Chris Ye989bb932020-07-04 16:18:59 -07002314 if (device.id == mBuiltInKeyboardId) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002315 ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this",
Chris Ye989bb932020-07-04 16:18:59 -07002316 device.path.c_str(), mBuiltInKeyboardId);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002317 mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD;
2318 }
2319
Siarhei Vishniakoue54cb852017-03-21 17:48:16 -07002320 unregisterDeviceFromEpollLocked(device);
Chris Ye989bb932020-07-04 16:18:59 -07002321 if (device.videoDevice) {
Siarhei Vishniakou12598682018-11-02 17:19:19 -07002322 // This must be done after the video device is removed from epoll
Chris Ye989bb932020-07-04 16:18:59 -07002323 mUnattachedVideoDevices.push_back(std::move(device.videoDevice));
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002324 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002325
Chris Ye989bb932020-07-04 16:18:59 -07002326 releaseControllerNumberLocked(device.controllerNumber);
Siarhei Vishniakoud549b252020-08-11 11:25:26 -05002327 device.controllerNumber = 0;
Chris Ye989bb932020-07-04 16:18:59 -07002328 device.close();
Chris Ye989bb932020-07-04 16:18:59 -07002329 mClosingDevices.push_back(std::move(mDevices[device.id]));
Siarhei Vishniakoud549b252020-08-11 11:25:26 -05002330
Chris Ye989bb932020-07-04 16:18:59 -07002331 mDevices.erase(device.id);
Chris Yee2b1e5c2021-03-10 22:45:12 -08002332 // If all devices with the descriptor have been removed then the miscellaneous device should
2333 // be removed too.
2334 std::string descriptor = device.identifier.descriptor;
2335 if (getDeviceByDescriptorLocked(descriptor) == nullptr) {
2336 mMiscDevices.erase(descriptor);
2337 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002338}
2339
2340status_t EventHub::readNotifyLocked() {
2341 int res;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002342 char event_buf[512];
2343 int event_size;
2344 int event_pos = 0;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002345 struct inotify_event* event;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002346
2347 ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd);
2348 res = read(mINotifyFd, event_buf, sizeof(event_buf));
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002349 if (res < (int)sizeof(*event)) {
2350 if (errno == EINTR) return 0;
Michael Wrightd02c5b62014-02-10 15:10:22 -08002351 ALOGW("could not get event, %s\n", strerror(errno));
2352 return -1;
2353 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002354
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002355 while (res >= (int)sizeof(*event)) {
2356 event = (struct inotify_event*)(event_buf + event_pos);
2357 if (event->len) {
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002358 if (event->wd == mInputWd) {
Chris Ye8594e192020-07-14 10:34:06 -07002359 std::string filename = std::string(DEVICE_PATH) + "/" + event->name;
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002360 if (event->mask & IN_CREATE) {
Chris Ye8594e192020-07-14 10:34:06 -07002361 openDeviceLocked(filename);
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002362 } else {
2363 ALOGI("Removing device '%s' due to inotify event\n", filename.c_str());
Chris Ye8594e192020-07-14 10:34:06 -07002364 closeDeviceByPathLocked(filename);
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002365 }
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002366 } else if (event->wd == mVideoWd) {
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002367 if (isV4lTouchNode(event->name)) {
Chris Ye8594e192020-07-14 10:34:06 -07002368 std::string filename = std::string(VIDEO_DEVICE_PATH) + "/" + event->name;
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002369 if (event->mask & IN_CREATE) {
2370 openVideoDeviceLocked(filename);
2371 } else {
2372 ALOGI("Removing video device '%s' due to inotify event", filename.c_str());
2373 closeVideoDeviceByPathLocked(filename);
2374 }
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002375 }
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002376 } else {
Siarhei Vishniakou951f3622018-12-12 19:45:42 -08002377 LOG_ALWAYS_FATAL("Unexpected inotify event, wd = %i", event->wd);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002378 }
2379 }
2380 event_size = sizeof(*event) + event->len;
2381 res -= event_size;
2382 event_pos += event_size;
2383 }
2384 return 0;
2385}
2386
Chris Ye8594e192020-07-14 10:34:06 -07002387status_t EventHub::scanDirLocked(const std::string& dirname) {
2388 for (const auto& entry : std::filesystem::directory_iterator(dirname)) {
2389 openDeviceLocked(entry.path());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002390 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002391 return 0;
2392}
2393
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002394/**
2395 * Look for all dirname/v4l-touch* devices, and open them.
2396 */
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002397status_t EventHub::scanVideoDirLocked(const std::string& dirname) {
Chris Ye8594e192020-07-14 10:34:06 -07002398 for (const auto& entry : std::filesystem::directory_iterator(dirname)) {
2399 if (isV4lTouchNode(entry.path())) {
2400 ALOGI("Found touch video device %s", entry.path().c_str());
2401 openVideoDeviceLocked(entry.path());
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002402 }
2403 }
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002404 return OK;
2405}
2406
Michael Wrightd02c5b62014-02-10 15:10:22 -08002407void EventHub::requestReopenDevices() {
2408 ALOGV("requestReopenDevices() called");
2409
Chris Ye87143712020-11-10 05:05:58 +00002410 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002411 mNeedToReopenDevices = true;
2412}
2413
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002414void EventHub::dump(std::string& dump) {
2415 dump += "Event Hub State:\n";
Michael Wrightd02c5b62014-02-10 15:10:22 -08002416
2417 { // acquire lock
Chris Ye87143712020-11-10 05:05:58 +00002418 std::scoped_lock _l(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002419
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002420 dump += StringPrintf(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002421
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002422 dump += INDENT "Devices:\n";
Michael Wrightd02c5b62014-02-10 15:10:22 -08002423
Chris Ye989bb932020-07-04 16:18:59 -07002424 for (const auto& [id, device] : mDevices) {
Michael Wrightd02c5b62014-02-10 15:10:22 -08002425 if (mBuiltInKeyboardId == device->id) {
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002426 dump += StringPrintf(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002427 device->id, device->identifier.name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002428 } else {
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002429 dump += StringPrintf(INDENT2 "%d: %s\n", device->id,
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002430 device->identifier.name.c_str());
Michael Wrightd02c5b62014-02-10 15:10:22 -08002431 }
Chris Ye1b0c7342020-07-28 21:57:03 -07002432 dump += StringPrintf(INDENT3 "Classes: %s\n", device->classes.string().c_str());
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01002433 dump += StringPrintf(INDENT3 "Path: %s\n", device->path.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002434 dump += StringPrintf(INDENT3 "Enabled: %s\n", toString(device->enabled));
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01002435 dump += StringPrintf(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.c_str());
2436 dump += StringPrintf(INDENT3 "Location: %s\n", device->identifier.location.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002437 dump += StringPrintf(INDENT3 "ControllerNumber: %d\n", device->controllerNumber);
Siarhei Vishniakouec8f7252018-07-06 11:19:32 +01002438 dump += StringPrintf(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002439 dump += StringPrintf(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, "
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002440 "product=0x%04x, version=0x%04x\n",
2441 device->identifier.bus, device->identifier.vendor,
2442 device->identifier.product, device->identifier.version);
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002443 dump += StringPrintf(INDENT3 "KeyLayoutFile: %s\n",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002444 device->keyMap.keyLayoutFile.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002445 dump += StringPrintf(INDENT3 "KeyCharacterMapFile: %s\n",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002446 device->keyMap.keyCharacterMapFile.c_str());
Siarhei Vishniakouf93fcf42017-11-22 16:00:14 -08002447 dump += StringPrintf(INDENT3 "ConfigurationFile: %s\n",
Prabir Pradhanda7c00c2019-08-29 14:12:42 -07002448 device->configurationFile.c_str());
Siarhei Vishniakouec7854a2018-12-14 16:52:34 -08002449 dump += INDENT3 "VideoDevice: ";
2450 if (device->videoDevice) {
2451 dump += device->videoDevice->dump() + "\n";
2452 } else {
2453 dump += "<none>\n";
2454 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002455 }
Siarhei Vishniakou22c88462018-12-13 19:34:53 -08002456
2457 dump += INDENT "Unattached video devices:\n";
2458 for (const std::unique_ptr<TouchVideoDevice>& videoDevice : mUnattachedVideoDevices) {
2459 dump += INDENT2 + videoDevice->dump() + "\n";
2460 }
2461 if (mUnattachedVideoDevices.empty()) {
2462 dump += INDENT2 "<none>\n";
2463 }
Michael Wrightd02c5b62014-02-10 15:10:22 -08002464 } // release lock
2465}
2466
2467void EventHub::monitor() {
2468 // Acquire and release the lock to ensure that the event hub has not deadlocked.
Chris Ye1c2e0892020-11-30 21:41:44 -08002469 std::unique_lock<std::mutex> lock(mLock);
Michael Wrightd02c5b62014-02-10 15:10:22 -08002470}
2471
Michael Wrightd02c5b62014-02-10 15:10:22 -08002472}; // namespace android