/*
* Copyright (C) 2010 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.
*/
#include <stdint.h>
#include <math.h>
#include <sys/types.h>
#include <utils/Atomic.h>
#include <utils/Errors.h>
#include <utils/Singleton.h>
#include <binder/BinderService.h>
#include <binder/Parcel.h>
#include <binder/IServiceManager.h>
#include <hardware/sensors.h>
#include "SensorDevice.h"
#include "SensorService.h"
namespace android {
// ---------------------------------------------------------------------------
ANDROID_SINGLETON_STATIC_INSTANCE(SensorDevice)
SensorDevice::SensorDevice()
: mSensorDevice(0),
mSensorModule(0)
{
status_t err = hw_get_module(SENSORS_HARDWARE_MODULE_ID,
(hw_module_t const**)&mSensorModule);
ALOGE_IF(err, "couldn't load %s module (%s)",
SENSORS_HARDWARE_MODULE_ID, strerror(-err));
if (mSensorModule) {
err = sensors_open_1(&mSensorModule->common, &mSensorDevice);
ALOGE_IF(err, "couldn't open device for module %s (%s)",
SENSORS_HARDWARE_MODULE_ID, strerror(-err));
if (mSensorDevice) {
sensor_t const* list;
ssize_t count = mSensorModule->get_sensors_list(mSensorModule, &list);
mActivationCount.setCapacity(count);
Info model;
for (size_t i=0 ; i<size_t(count) ; i++) {
mActivationCount.add(list[i].handle, model);
mSensorDevice->activate(
reinterpret_cast<struct sensors_poll_device_t *>(mSensorDevice),
list[i].handle, 0);
}
}
}
}
void SensorDevice::dump(String8& result)
{
if (!mSensorModule) return;
sensor_t const* list;
ssize_t count = mSensorModule->get_sensors_list(mSensorModule, &list);
result.appendFormat("%d h/w sensors:\n", int(count));
Mutex::Autolock _l(mLock);
for (size_t i=0 ; i<size_t(count) ; i++) {
const Info& info = mActivationCount.valueFor(list[i].handle);
result.appendFormat("handle=0x%08x, active-count=%d, batch_period(ms)={ ", list[i].handle,
info.batchParams.size());
for (size_t j = 0; j < info.batchParams.size(); j++) {
BatchParams params = info.batchParams.valueAt(j);
result.appendFormat("%4.1f%s", params.batchDelay / 1e6f,
j < info.batchParams.size() - 1 ? ", " : "");
}
result.appendFormat(" }, selected=%4.1f ms\n", info.bestBatchParams.batchDelay / 1e6f);
result.appendFormat("handle=0x%08x, active-count=%d, batch_timeout(ms)={ ", list[i].handle,
info.batchParams.size());
for (size_t j = 0; j < info.batchParams.size(); j++) {
BatchParams params = info.batchParams.valueAt(j);
result.appendFormat("%4.1f%s", params.batchTimeout / 1e6f,
j < info.batchParams.size() - 1 ? ", " : "");
}
result.appendFormat(" }, selected=%4.1f ms\n", info.bestBatchParams.batchTimeout / 1e6f);
}
}
ssize_t SensorDevice::getSensorList(sensor_t const** list) {
if (!mSensorModule) return NO_INIT;
ssize_t count = mSensorModule->get_sensors_list(mSensorModule, list);
return count;
}
status_t SensorDevice::initCheck() const {
return mSensorDevice && mSensorModule ? NO_ERROR : NO_INIT;
}
ssize_t SensorDevice::poll(sensors_event_t* buffer, size_t count) {
if (!mSensorDevice) return NO_INIT;
ssize_t c;
do {
c = mSensorDevice->poll(reinterpret_cast<struct sensors_poll_device_t *> (mSensorDevice),
buffer, count);
} while (c == -EINTR);
return c;
}
void SensorDevice::autoDisable(void *ident, int handle) {
Info& info( mActivationCount.editValueFor(handle) );
Mutex::Autolock _l(mLock);
info.removeBatchParamsForIdent(ident);
}
status_t SensorDevice::activate(void* ident, int handle, int enabled)
{
if (!mSensorDevice) return NO_INIT;
status_t err(NO_ERROR);
bool actuateHardware = false;
Mutex::Autolock _l(mLock);
Info& info( mActivationCount.editValueFor(handle) );
ALOGD_IF(DEBUG_CONNECTIONS,
"SensorDevice::activate: ident=%p, handle=0x%08x, enabled=%d, count=%d",
ident, handle, enabled, info.batchParams.size());
if (enabled) {
ALOGD_IF(DEBUG_CONNECTIONS, "enable index=%d", info.batchParams.indexOfKey(ident));
if (info.batchParams.indexOfKey(ident) >= 0) {
if (info.batchParams.size() == 1) {
// This is the first connection, we need to activate the underlying h/w sensor.
actuateHardware = true;
}
} else {
// Log error. Every activate call should be preceded by a batch() call.
ALOGE("\t >>>ERROR: activate called without batch");
}
} else {
ALOGD_IF(DEBUG_CONNECTIONS, "disable index=%d", info.batchParams.indexOfKey(ident));
if (info.removeBatchParamsForIdent(ident) >= 0) {
if (info.batchParams.size() == 0) {
// This is the last connection, we need to de-activate the underlying h/w sensor.
actuateHardware = true;
} else {
const int halVersion = getHalDeviceVersion();
if (halVersion >= SENSORS_DEVICE_API_VERSION_1_1) {
// Call batch for this sensor with the previously calculated best effort
// batch_rate and timeout. One of the apps has unregistered for sensor
// events, and the best effort batch parameters might have changed.
ALOGD_IF(DEBUG_CONNECTIONS,
"\t>>> actuating h/w batch %d %d %lld %lld ", handle,
info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
info.bestBatchParams.batchTimeout);
mSensorDevice->batch(mSensorDevice, handle,info.bestBatchParams.flags,
info.bestBatchParams.batchDelay,
info.bestBatchParams.batchTimeout);
}
}
} else {
// sensor wasn't enabled for this ident
}
}
if (actuateHardware) {
ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w activate handle=%d enabled=%d", handle, enabled);
err = mSensorDevice->activate(
reinterpret_cast<struct sensors_poll_device_t *> (mSensorDevice), handle, enabled);
ALOGE_IF(err, "Error %s sensor %d (%s)", enabled ? "activating" : "disabling", handle,
strerror(-err));
if (err != NO_ERROR && enabled) {
// Failure when enabling the sensor. Clean up on failure.
info.removeBatchParamsForIdent(ident);
}
}
// On older devices which do not support batch, call setDelay().
if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_1 && info.batchParams.size() > 0) {
ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w setDelay %d %lld ", handle,
info.bestBatchParams.batchDelay);
mSensorDevice->setDelay(
reinterpret_cast<struct sensors_poll_device_t *>(mSensorDevice),
handle, info.bestBatchParams.batchDelay);
}
return err;
}
status_t SensorDevice::batch(void* ident, int handle, int flags, int64_t samplingPeriodNs,
int64_t maxBatchReportLatencyNs) {
if (!mSensorDevice) return NO_INIT;
if (samplingPeriodNs < MINIMUM_EVENTS_PERIOD) {
samplingPeriodNs = MINIMUM_EVENTS_PERIOD;
}
const int halVersion = getHalDeviceVersion();
if (halVersion >= SENSORS_DEVICE_API_VERSION_1_1) {
if (flags & SENSORS_BATCH_DRY_RUN) {
return mSensorDevice->batch(mSensorDevice, handle, flags, samplingPeriodNs,
maxBatchReportLatencyNs);
} else {
// Call h/w with dry run to see if the given parameters are feasible or not. Return if
// there is an error.
status_t errDryRun(NO_ERROR);
errDryRun = mSensorDevice->batch(mSensorDevice, handle, flags | SENSORS_BATCH_DRY_RUN,
samplingPeriodNs, maxBatchReportLatencyNs);
if (errDryRun != NO_ERROR) {
ALOGD_IF(DEBUG_CONNECTIONS, "SensorDevice::batch dry run error %s",
strerror(-errDryRun));
return errDryRun;
}
}
} else if (maxBatchReportLatencyNs != 0) {
// Batch is not supported on older devices.
return INVALID_OPERATION;
}
ALOGD_IF(DEBUG_CONNECTIONS,
"SensorDevice::batch: ident=%p, handle=0x%08x, flags=%d, period_ns=%lld timeout=%lld",
ident, handle, flags, samplingPeriodNs, maxBatchReportLatencyNs);
Mutex::Autolock _l(mLock);
Info& info(mActivationCount.editValueFor(handle));
if (info.batchParams.indexOfKey(ident) < 0) {
BatchParams params(flags, samplingPeriodNs, maxBatchReportLatencyNs);
info.batchParams.add(ident, params);
} else {
// A batch has already been called with this ident. Update the batch parameters.
info.setBatchParamsForIdent(ident, flags, samplingPeriodNs, maxBatchReportLatencyNs);
}
BatchParams prevBestBatchParams = info.bestBatchParams;
// Find the minimum of all timeouts and batch_rates for this sensor.
info.selectBatchParams();
ALOGD_IF(DEBUG_CONNECTIONS,
"\t>>> curr_period=%lld min_period=%lld curr_timeout=%lld min_timeout=%lld",
prevBestBatchParams.batchDelay, info.bestBatchParams.batchDelay,
prevBestBatchParams.batchTimeout, info.bestBatchParams.batchTimeout);
status_t err(NO_ERROR);
// If the min period or min timeout has changed since the last batch call, call batch.
if (prevBestBatchParams != info.bestBatchParams) {
if (halVersion >= SENSORS_DEVICE_API_VERSION_1_1) {
ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w BATCH %d %d %lld %lld ", handle,
info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
info.bestBatchParams.batchTimeout);
err = mSensorDevice->batch(mSensorDevice, handle, info.bestBatchParams.flags,
info.bestBatchParams.batchDelay,
info.bestBatchParams.batchTimeout);
} else {
// For older devices which do not support batch, call setDelay() after activate() is
// called. Some older devices may not support calling setDelay before activate(), so
// call setDelay in SensorDevice::activate() method.
}
if (err != NO_ERROR) {
ALOGE("sensor batch failed %p %d %d %lld %lld err=%s", mSensorDevice, handle,
info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
info.bestBatchParams.batchTimeout, strerror(-err));
info.removeBatchParamsForIdent(ident);
}
}
return err;
}
status_t SensorDevice::setDelay(void* ident, int handle, int64_t samplingPeriodNs)
{
if (!mSensorDevice) return NO_INIT;
if (samplingPeriodNs < MINIMUM_EVENTS_PERIOD) {
samplingPeriodNs = MINIMUM_EVENTS_PERIOD;
}
Mutex::Autolock _l(mLock);
Info& info( mActivationCount.editValueFor(handle) );
// If the underlying sensor is NOT in continuous mode, setDelay() should return an error.
// Calling setDelay() in batch mode is an invalid operation.
if (info.bestBatchParams.batchTimeout != 0) {
return INVALID_OPERATION;
}
ssize_t index = info.batchParams.indexOfKey(ident);
if (index < 0) {
return BAD_INDEX;
}
BatchParams& params = info.batchParams.editValueAt(index);
params.batchDelay = samplingPeriodNs;
info.selectBatchParams();
return mSensorDevice->setDelay(reinterpret_cast<struct sensors_poll_device_t *>(mSensorDevice),
handle, info.bestBatchParams.batchDelay);
}
int SensorDevice::getHalDeviceVersion() const {
if (!mSensorDevice) return -1;
return mSensorDevice->common.version;
}
status_t SensorDevice::flush(void* ident, int handle) {
if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_1) {
return INVALID_OPERATION;
}
ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w flush %d", handle);
return mSensorDevice->flush(mSensorDevice, handle);
}
// ---------------------------------------------------------------------------
status_t SensorDevice::Info::setBatchParamsForIdent(void* ident, int flags,
int64_t samplingPeriodNs,
int64_t maxBatchReportLatencyNs) {
ssize_t index = batchParams.indexOfKey(ident);
if (index < 0) {
ALOGE("Info::setBatchParamsForIdent(ident=%p, period_ns=%lld timeout=%lld) failed (%s)",
ident, samplingPeriodNs, maxBatchReportLatencyNs, strerror(-index));
return BAD_INDEX;
}
BatchParams& params = batchParams.editValueAt(index);
params.flags = flags;
params.batchDelay = samplingPeriodNs;
params.batchTimeout = maxBatchReportLatencyNs;
return NO_ERROR;
}
void SensorDevice::Info::selectBatchParams() {
BatchParams bestParams(-1, -1, -1);
if (batchParams.size() > 0) {
BatchParams params = batchParams.valueAt(0);
bestParams = params;
}
for (size_t i = 1; i < batchParams.size(); ++i) {
BatchParams params = batchParams.valueAt(i);
if (params.batchDelay < bestParams.batchDelay) {
bestParams.batchDelay = params.batchDelay;
}
if (params.batchTimeout < bestParams.batchTimeout) {
bestParams.batchTimeout = params.batchTimeout;
}
}
bestBatchParams = bestParams;
}
ssize_t SensorDevice::Info::removeBatchParamsForIdent(void* ident) {
ssize_t idx = batchParams.removeItem(ident);
if (idx >= 0) {
selectBatchParams();
}
return idx;
}
// ---------------------------------------------------------------------------
}; // namespace android