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 {SW_MUTE_DEVICE, INPUT_USAGE_SWITCH_UNKNOWN},
51 {SW_PEN_INSERTED, INPUT_USAGE_SWITCH_UNKNOWN},
52 {SW_HPHL_OVERCURRENT, INPUT_USAGE_SWITCH_UNKNOWN},
53 {SW_HPHR_OVERCURRENT, INPUT_USAGE_SWITCH_UNKNOWN},
54 {SW_UNSUPPORT_INSERT, INPUT_USAGE_SWITCH_UNKNOWN},
55 {0x13 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
56 {0x14 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
57 {0x15 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
58 {0x16 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
59 {0x17 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
60 {0x18 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
61 {0x19 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
62 {SW_MAX, INPUT_USAGE_SWITCH_UNKNOWN},
63 };
64
SwitchInputMapper()65 SwitchInputMapper::SwitchInputMapper()
66 : InputMapper() {
67 // If this gets larger than 64, then the mSwitchValues and mUpdatedSwitchMask
68 // variables need to be changed to support more than 64 bits.
69 static_assert(SW_CNT <= 64, "More than 64 switches defined in linux/input.h");
70 }
71
configureInputReport(InputDeviceNode * devNode,InputReportDefinition * report)72 bool SwitchInputMapper::configureInputReport(InputDeviceNode* devNode,
73 InputReportDefinition* report) {
74 InputUsage usages[SW_CNT];
75 int numUsages = 0;
76 for (int32_t i = 0; i < SW_CNT; ++i) {
77 if (devNode->hasSwitch(codeMap[i].scancode)) {
78 usages[numUsages++] = codeMap[i].usage;
79 }
80 }
81 if (numUsages == 0) {
82 ALOGE("SwitchInputMapper found no switches for %s!", devNode->getPath().c_str());
83 return false;
84 }
85 setInputReportDefinition(report);
86 getInputReportDefinition()->addCollection(INPUT_COLLECTION_ID_SWITCH, 1);
87 getInputReportDefinition()->declareUsages(INPUT_COLLECTION_ID_SWITCH, usages, numUsages);
88 return true;
89 }
90
process(const InputEvent & event)91 void SwitchInputMapper::process(const InputEvent& event) {
92 switch (event.type) {
93 case EV_SW:
94 processSwitch(event.code, event.value);
95 break;
96 case EV_SYN:
97 if (event.code == SYN_REPORT) {
98 sync(event.when);
99 }
100 break;
101 default:
102 ALOGV("unknown switch event type: %d", event.type);
103 }
104 }
105
processSwitch(int32_t switchCode,int32_t switchValue)106 void SwitchInputMapper::processSwitch(int32_t switchCode, int32_t switchValue) {
107 ALOGV("processing switch event. code=%" PRId32 ", value=%" PRId32, switchCode, switchValue);
108 if (switchCode >= 0 && switchCode < SW_CNT) {
109 if (switchValue) {
110 mSwitchValues.markBit(switchCode);
111 } else {
112 mSwitchValues.clearBit(switchCode);
113 }
114 mUpdatedSwitchMask.markBit(switchCode);
115 }
116 }
117
sync(nsecs_t when)118 void SwitchInputMapper::sync(nsecs_t when) {
119 if (mUpdatedSwitchMask.isEmpty()) {
120 // Clear the values just in case.
121 mSwitchValues.clear();
122 return;
123 }
124
125 while (!mUpdatedSwitchMask.isEmpty()) {
126 auto bit = mUpdatedSwitchMask.firstMarkedBit();
127 getInputReport()->setBoolUsage(INPUT_COLLECTION_ID_SWITCH, codeMap[bit].usage,
128 mSwitchValues.hasBit(bit), 0);
129 mUpdatedSwitchMask.clearBit(bit);
130 }
131 getInputReport()->reportEvent(getDeviceHandle());
132 mUpdatedSwitchMask.clear();
133 mSwitchValues.clear();
134 }
135
136 } // namespace android
137