1 /*
2 * Copyright (C) 2015 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
17 #define LOG_TAG "SwitchInputMapper"
18 //#define LOG_NDEBUG 0
19
20 #include "SwitchInputMapper.h"
21
22 #include <inttypes.h>
23 #include <linux/input.h>
24 #include <hardware/input.h>
25 #include <utils/Log.h>
26
27 #include "InputHost.h"
28 #include "InputHub.h"
29
30 namespace android {
31
32 static struct {
33 int32_t scancode;
34 InputUsage usage;
35 } codeMap[] = {
36 {SW_LID, INPUT_USAGE_SWITCH_LID},
37 {SW_TABLET_MODE, INPUT_USAGE_SWITCH_UNKNOWN},
38 {SW_HEADPHONE_INSERT, INPUT_USAGE_SWITCH_HEADPHONE_INSERT},
39 {SW_RFKILL_ALL, INPUT_USAGE_SWITCH_UNKNOWN},
40 {SW_MICROPHONE_INSERT, INPUT_USAGE_SWITCH_MICROPHONE_INSERT},
41 {SW_DOCK, INPUT_USAGE_SWITCH_UNKNOWN},
42 {SW_LINEOUT_INSERT, INPUT_USAGE_SWITCH_LINEOUT_INSERT},
43 {SW_JACK_PHYSICAL_INSERT, INPUT_USAGE_SWITCH_UNKNOWN},
44 {SW_VIDEOOUT_INSERT, INPUT_USAGE_SWITCH_UNKNOWN},
45 {SW_CAMERA_LENS_COVER, INPUT_USAGE_SWITCH_CAMERA_LENS_COVER},
46 {SW_KEYPAD_SLIDE, INPUT_USAGE_SWITCH_KEYPAD_SLIDE},
47 {SW_FRONT_PROXIMITY, INPUT_USAGE_SWITCH_UNKNOWN},
48 {SW_ROTATE_LOCK, INPUT_USAGE_SWITCH_UNKNOWN},
49 {SW_LINEIN_INSERT, INPUT_USAGE_SWITCH_UNKNOWN},
50 {0x0e /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
51 {SW_MAX, INPUT_USAGE_SWITCH_UNKNOWN},
52 };
53
SwitchInputMapper()54 SwitchInputMapper::SwitchInputMapper()
55 : InputMapper() {
56 static_assert(SW_CNT <= 32, "More than 32 switches defined in linux/input.h");
57 }
58
configureInputReport(InputDeviceNode * devNode,InputReportDefinition * report)59 bool SwitchInputMapper::configureInputReport(InputDeviceNode* devNode,
60 InputReportDefinition* report) {
61 InputUsage usages[SW_CNT];
62 int numUsages = 0;
63 for (int32_t i = 0; i < SW_CNT; ++i) {
64 if (devNode->hasSwitch(codeMap[i].scancode)) {
65 usages[numUsages++] = codeMap[i].usage;
66 }
67 }
68 if (numUsages == 0) {
69 ALOGE("SwitchInputMapper found no switches for %s!", devNode->getPath().c_str());
70 return false;
71 }
72 setInputReportDefinition(report);
73 getInputReportDefinition()->addCollection(INPUT_COLLECTION_ID_SWITCH, 1);
74 getInputReportDefinition()->declareUsages(INPUT_COLLECTION_ID_SWITCH, usages, numUsages);
75 return true;
76 }
77
process(const InputEvent & event)78 void SwitchInputMapper::process(const InputEvent& event) {
79 switch (event.type) {
80 case EV_SW:
81 processSwitch(event.code, event.value);
82 break;
83 case EV_SYN:
84 if (event.code == SYN_REPORT) {
85 sync(event.when);
86 }
87 break;
88 default:
89 ALOGV("unknown switch event type: %d", event.type);
90 }
91 }
92
processSwitch(int32_t switchCode,int32_t switchValue)93 void SwitchInputMapper::processSwitch(int32_t switchCode, int32_t switchValue) {
94 ALOGV("processing switch event. code=%" PRId32 ", value=%" PRId32, switchCode, switchValue);
95 if (switchCode >= 0 && switchCode < SW_CNT) {
96 if (switchValue) {
97 mSwitchValues.markBit(switchCode);
98 } else {
99 mSwitchValues.clearBit(switchCode);
100 }
101 mUpdatedSwitchMask.markBit(switchCode);
102 }
103 }
104
sync(nsecs_t when)105 void SwitchInputMapper::sync(nsecs_t when) {
106 if (mUpdatedSwitchMask.isEmpty()) {
107 // Clear the values just in case.
108 mSwitchValues.clear();
109 return;
110 }
111
112 while (!mUpdatedSwitchMask.isEmpty()) {
113 auto bit = mUpdatedSwitchMask.firstMarkedBit();
114 getInputReport()->setBoolUsage(INPUT_COLLECTION_ID_SWITCH, codeMap[bit].usage,
115 mSwitchValues.hasBit(bit), 0);
116 mUpdatedSwitchMask.clearBit(bit);
117 }
118 getInputReport()->reportEvent(getDeviceHandle());
119 mUpdatedSwitchMask.clear();
120 mSwitchValues.clear();
121 }
122
123 } // namespace android
124