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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "SwitchInputMapper"
//#define LOG_NDEBUG 0
#include "SwitchInputMapper.h"
#include <inttypes.h>
#include <linux/input.h>
#include <hardware/input.h>
#include <utils/Log.h>
#include "InputHost.h"
#include "InputHub.h"
namespace android {
static struct {
int32_t scancode;
InputUsage usage;
} codeMap[] = {
{SW_LID, INPUT_USAGE_SWITCH_LID},
{SW_TABLET_MODE, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_HEADPHONE_INSERT, INPUT_USAGE_SWITCH_HEADPHONE_INSERT},
{SW_RFKILL_ALL, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_MICROPHONE_INSERT, INPUT_USAGE_SWITCH_MICROPHONE_INSERT},
{SW_DOCK, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_LINEOUT_INSERT, INPUT_USAGE_SWITCH_LINEOUT_INSERT},
{SW_JACK_PHYSICAL_INSERT, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_VIDEOOUT_INSERT, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_CAMERA_LENS_COVER, INPUT_USAGE_SWITCH_CAMERA_LENS_COVER},
{SW_KEYPAD_SLIDE, INPUT_USAGE_SWITCH_KEYPAD_SLIDE},
{SW_FRONT_PROXIMITY, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_ROTATE_LOCK, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_LINEIN_INSERT, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_MUTE_DEVICE, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_PEN_INSERTED, INPUT_USAGE_SWITCH_UNKNOWN},
{SW_MACHINE_COVER, INPUT_USAGE_SWITCH_UNKNOWN},
{0x11 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x12 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x13 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x14 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x15 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x16 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x17 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x18 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x19 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x1a /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x1b /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x1c /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x1d /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x1e /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x1f /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
{0x20 /* unused */, INPUT_USAGE_SWITCH_UNKNOWN},
};
static_assert(SW_MAX == SW_MACHINE_COVER, "SW_MAX is not SW_MACHINE_COVER");
// This is the max value that any kernel has ever used. The v5.4 kernels
// increased SW_MAX to 0x20, while v5.8 decreased the value to 0x10.
static constexpr int32_t kMaxNumInputCodes = 0x21;
SwitchInputMapper::SwitchInputMapper()
: InputMapper() {
// If this gets larger than 64, then the mSwitchValues and mUpdatedSwitchMask
// variables need to be changed to support more than 64 bits.
static_assert(SW_CNT <= 64, "More than 64 switches defined in linux/input.h");
}
bool SwitchInputMapper::configureInputReport(InputDeviceNode* devNode,
InputReportDefinition* report) {
InputUsage usages[kMaxNumInputCodes];
int numUsages = 0;
for (int32_t i = 0; i < kMaxNumInputCodes; ++i) {
if (devNode->hasSwitch(codeMap[i].scancode)) {
usages[numUsages++] = codeMap[i].usage;
}
}
if (numUsages == 0) {
ALOGE("SwitchInputMapper found no switches for %s!", devNode->getPath().c_str());
return false;
}
setInputReportDefinition(report);
getInputReportDefinition()->addCollection(INPUT_COLLECTION_ID_SWITCH, 1);
getInputReportDefinition()->declareUsages(INPUT_COLLECTION_ID_SWITCH, usages, numUsages);
return true;
}
void SwitchInputMapper::process(const InputEvent& event) {
switch (event.type) {
case EV_SW:
processSwitch(event.code, event.value);
break;
case EV_SYN:
if (event.code == SYN_REPORT) {
sync(event.when);
}
break;
default:
ALOGV("unknown switch event type: %d", event.type);
}
}
void SwitchInputMapper::processSwitch(int32_t switchCode, int32_t switchValue) {
ALOGV("processing switch event. code=%" PRId32 ", value=%" PRId32, switchCode, switchValue);
if (switchCode >= 0 && switchCode < kMaxNumInputCodes) {
if (switchValue) {
mSwitchValues.markBit(switchCode);
} else {
mSwitchValues.clearBit(switchCode);
}
mUpdatedSwitchMask.markBit(switchCode);
}
}
void SwitchInputMapper::sync(nsecs_t when) {
if (mUpdatedSwitchMask.isEmpty()) {
// Clear the values just in case.
mSwitchValues.clear();
return;
}
while (!mUpdatedSwitchMask.isEmpty()) {
auto bit = mUpdatedSwitchMask.firstMarkedBit();
getInputReport()->setBoolUsage(INPUT_COLLECTION_ID_SWITCH, codeMap[bit].usage,
mSwitchValues.hasBit(bit), 0);
mUpdatedSwitchMask.clearBit(bit);
}
getInputReport()->reportEvent(getDeviceHandle());
mUpdatedSwitchMask.clear();
mSwitchValues.clear();
}
} // namespace android
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