43 changes: 39 additions & 4 deletions libsensors/Android.mk
View file
Expand Up @@ -17,15 +17,50 @@ LOCAL_PATH := $(call my-dir)

ifneq ($(TARGET_SIMULATOR),true)

# HAL module implemenation, not prelinked and stored in
# HAL module implemenation, not prelinked, and stored in
# hw/<SENSORS_HARDWARE_MODULE_ID>.<ro.product.board>.so
include $(CLEAR_VARS)
LOCAL_PRELINK_MODULE := false

LOCAL_MODULE := sensors.sapphire

LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw

LOCAL_MODULE_TAGS := optional

LOCAL_CFLAGS := -DLOG_TAG=\"Sensors\"
LOCAL_SRC_FILES := \
sensors.c \
nusensors.cpp \
InputEventReader.cpp \
SensorBase.cpp \
AkmSensor.cpp

LOCAL_SHARED_LIBRARIES := liblog libcutils
LOCAL_PRELINK_MODULE := false

include $(BUILD_SHARED_LIBRARY)

# HAL module implemenation, not prelinked and stored in
# hw/<SENSORS_HARDWARE_MODULE_ID>.<ro.product.board>.so
include $(CLEAR_VARS)

LOCAL_MODULE := sensors.trout

LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw

LOCAL_MODULE_TAGS := optional

LOCAL_CFLAGS := -DLOG_TAG=\"Sensors\"
LOCAL_SRC_FILES := \
sensors.c \
nusensors.cpp \
InputEventReader.cpp \
SensorBase.cpp \
AkmSensor.cpp

LOCAL_SHARED_LIBRARIES := liblog libcutils
LOCAL_SRC_FILES := sensors.c
LOCAL_MODULE := sensors.msm7k
LOCAL_PRELINK_MODULE := false

include $(BUILD_SHARED_LIBRARY)

endif # !TARGET_SIMULATOR
88 changes: 88 additions & 0 deletions libsensors/InputEventReader.cpp
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@@ -0,0 +1,88 @@
/*
* Copyright (C) 2008 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 <errno.h>
#include <unistd.h>
#include <poll.h>

#include <sys/cdefs.h>
#include <sys/types.h>

#include <linux/input.h>

#include <cutils/log.h>

#include "InputEventReader.h"

/*****************************************************************************/

struct input_event;

InputEventCircularReader::InputEventCircularReader(size_t numEvents)
: mBuffer(new input_event[numEvents * 2]),
mBufferEnd(mBuffer + numEvents),
mHead(mBuffer),
mCurr(mBuffer),
mFreeSpace(numEvents)
{
}

InputEventCircularReader::~InputEventCircularReader()
{
delete [] mBuffer;
}

ssize_t InputEventCircularReader::fill(int fd)
{
size_t numEventsRead = 0;
if (mFreeSpace) {
const ssize_t nread = read(fd, mHead, mFreeSpace * sizeof(input_event));
if (nread<0 || nread % sizeof(input_event)) {
// we got a partial event!!
return nread<0 ? -errno : -EINVAL;
}

numEventsRead = nread / sizeof(input_event);
if (numEventsRead) {
mHead += numEventsRead;
mFreeSpace -= numEventsRead;
if (mHead > mBufferEnd) {
size_t s = mHead - mBufferEnd;
memcpy(mBuffer, mBufferEnd, s * sizeof(input_event));
mHead = mBuffer + s;
}
}
}

return numEventsRead;
}

ssize_t InputEventCircularReader::readEvent(input_event const** events)
{
*events = mCurr;
ssize_t available = (mBufferEnd - mBuffer) - mFreeSpace;
return available ? 1 : 0;
}

void InputEventCircularReader::next()
{
mCurr++;
mFreeSpace++;
if (mCurr >= mBufferEnd) {
mCurr = mBuffer;
}
}
47 changes: 47 additions & 0 deletions libsensors/InputEventReader.h
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@@ -0,0 +1,47 @@
/*
* Copyright (C) 2008 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.
*/

#ifndef ANDROID_INPUT_EVENT_READER_H
#define ANDROID_INPUT_EVENT_READER_H

#include <stdint.h>
#include <errno.h>
#include <sys/cdefs.h>
#include <sys/types.h>

/*****************************************************************************/

struct input_event;

class InputEventCircularReader
{
struct input_event* const mBuffer;
struct input_event* const mBufferEnd;
struct input_event* mHead;
struct input_event* mCurr;
ssize_t mFreeSpace;

public:
InputEventCircularReader(size_t numEvents);
~InputEventCircularReader();
ssize_t fill(int fd);
ssize_t readEvent(input_event const** events);
void next();
};

/*****************************************************************************/

#endif // ANDROID_INPUT_EVENT_READER_H
154 changes: 154 additions & 0 deletions libsensors/LightSensor.cpp
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@@ -0,0 +1,154 @@
/*
* Copyright (C) 2008 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 <fcntl.h>
#include <errno.h>
#include <math.h>
#include <poll.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/select.h>

#include <linux/lightsensor.h>

#include <cutils/log.h>

#include "LightSensor.h"

/*****************************************************************************/

LightSensor::LightSensor()
: SensorBase(LS_DEVICE_NAME, "lightsensor-level"),
mEnabled(0),
mInputReader(4),
mHasPendingEvent(false)
{
mPendingEvent.version = sizeof(sensors_event_t);
mPendingEvent.sensor = ID_L;
mPendingEvent.type = SENSOR_TYPE_LIGHT;
memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));

open_device();

int flags = 0;
if (!ioctl(dev_fd, LIGHTSENSOR_IOCTL_GET_ENABLED, &flags)) {
if (flags) {
mEnabled = 1;
setInitialState();
}
}

if (!mEnabled) {
close_device();
}
}

LightSensor::~LightSensor() {
}

int LightSensor::setInitialState() {
struct input_absinfo absinfo;
if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_LIGHT), &absinfo)) {
mPendingEvent.light = indexToValue(absinfo.value);
mHasPendingEvent = true;
}
return 0;
}

int LightSensor::enable(int32_t, int en) {
int flags = en ? 1 : 0;
int err = 0;
if (flags != mEnabled) {
if (!mEnabled) {
open_device();
}
err = ioctl(dev_fd, LIGHTSENSOR_IOCTL_ENABLE, &flags);
err = err<0 ? -errno : 0;
LOGE_IF(err, "LIGHTSENSOR_IOCTL_ENABLE failed (%s)", strerror(-err));
if (!err) {
mEnabled = en ? 1 : 0;
if (en) {
setInitialState();
}
}
if (!mEnabled) {
close_device();
}
}
return err;
}

bool LightSensor::hasPendingEvents() const {
return mHasPendingEvent;
}

int LightSensor::readEvents(sensors_event_t* data, int count)
{
if (count < 1)
return -EINVAL;

if (mHasPendingEvent) {
mHasPendingEvent = false;
mPendingEvent.timestamp = getTimestamp();
*data = mPendingEvent;
return mEnabled ? 1 : 0;
}

ssize_t n = mInputReader.fill(data_fd);
if (n < 0)
return n;

int numEventReceived = 0;
input_event const* event;

while (count && mInputReader.readEvent(&event)) {
int type = event->type;
if (type == EV_ABS) {
if (event->code == EVENT_TYPE_LIGHT) {
if (event->value != -1) {
// FIXME: not sure why we're getting -1 sometimes
mPendingEvent.light = indexToValue(event->value);
}
}
} else if (type == EV_SYN) {
mPendingEvent.timestamp = timevalToNano(event->time);
if (mEnabled) {
*data++ = mPendingEvent;
count--;
numEventReceived++;
}
} else {
LOGE("LightSensor: unknown event (type=%d, code=%d)",
type, event->code);
}
mInputReader.next();
}

return numEventReceived;
}

float LightSensor::indexToValue(size_t index) const
{
static const float luxValues[8] = {
10.0, 160.0, 225.0, 320.0,
640.0, 1280.0, 2600.0, 10240.0
};

const size_t maxIndex = sizeof(luxValues)/sizeof(*luxValues) - 1;
if (index > maxIndex)
index = maxIndex;
return luxValues[index];
}
52 changes: 52 additions & 0 deletions libsensors/LightSensor.h
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@@ -0,0 +1,52 @@
/*
* Copyright (C) 2008 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.
*/

#ifndef ANDROID_LIGHT_SENSOR_H
#define ANDROID_LIGHT_SENSOR_H

#include <stdint.h>
#include <errno.h>
#include <sys/cdefs.h>
#include <sys/types.h>

#include "nusensors.h"
#include "SensorBase.h"
#include "InputEventReader.h"

/*****************************************************************************/

struct input_event;

class LightSensor : public SensorBase {
int mEnabled;
InputEventCircularReader mInputReader;
sensors_event_t mPendingEvent;
bool mHasPendingEvent;

float indexToValue(size_t index) const;
int setInitialState();

public:
LightSensor();
virtual ~LightSensor();
virtual int readEvents(sensors_event_t* data, int count);
virtual bool hasPendingEvents() const;
virtual int enable(int32_t handle, int enabled);
};

/*****************************************************************************/

#endif // ANDROID_LIGHT_SENSOR_H
Empty file added libsensors/MODULE_LICENSE_APACHE2
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Empty file.
190 changes: 190 additions & 0 deletions libsensors/NOTICE
View file
@@ -0,0 +1,190 @@

Copyright (c) 2008, 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.

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.


Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

1. Definitions.

"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.

"Licensor" shall mean the copyright owner or entity authorized by
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"You" (or "Your") shall mean an individual or Legal Entity
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not limited to compiled object code, generated documentation,
and conversions to other media types.

"Work" shall mean the work of authorship, whether in Source or
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"Contribution" shall mean any work of authorship, including
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2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.

3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.

4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:

(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and

(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and

(c) You must retain, in the Source form of any Derivative Works
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(d) If the Work includes a "NOTICE" text file as part of its
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5. Submission of Contributions. Unless You explicitly state otherwise,
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by You to the Licensor shall be under the terms and conditions of
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Notwithstanding the above, nothing herein shall supersede or modify
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6. Trademarks. This License does not grant permission to use the trade
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7. Disclaimer of Warranty. Unless required by applicable law or
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whether in tort (including negligence), contract, or otherwise,
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END OF TERMS AND CONDITIONS

144 changes: 144 additions & 0 deletions libsensors/ProximitySensor.cpp
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@@ -0,0 +1,144 @@
/*
* Copyright (C) 2008 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 <fcntl.h>
#include <errno.h>
#include <math.h>
#include <poll.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/select.h>

#include <linux/capella_cm3602.h>

#include <cutils/log.h>

#include "ProximitySensor.h"

/*****************************************************************************/

ProximitySensor::ProximitySensor()
: SensorBase(CM_DEVICE_NAME, "proximity"),
mEnabled(0),
mInputReader(4),
mHasPendingEvent(false)
{
mPendingEvent.version = sizeof(sensors_event_t);
mPendingEvent.sensor = ID_P;
mPendingEvent.type = SENSOR_TYPE_PROXIMITY;
memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));

open_device();

int flags = 0;
if (!ioctl(dev_fd, CAPELLA_CM3602_IOCTL_GET_ENABLED, &flags)) {
mEnabled = 1;
if (flags) {
setInitialState();
}
}
if (!mEnabled) {
close_device();
}
}

ProximitySensor::~ProximitySensor() {
}

int ProximitySensor::setInitialState() {
struct input_absinfo absinfo;
if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_PROXIMITY), &absinfo)) {
// make sure to report an event immediately
mHasPendingEvent = true;
mPendingEvent.distance = indexToValue(absinfo.value);
}
return 0;
}

int ProximitySensor::enable(int32_t, int en) {
int newState = en ? 1 : 0;
int err = 0;
if (newState != mEnabled) {
if (!mEnabled) {
open_device();
}
int flags = newState;
err = ioctl(dev_fd, CAPELLA_CM3602_IOCTL_ENABLE, &flags);
err = err<0 ? -errno : 0;
LOGE_IF(err, "CAPELLA_CM3602_IOCTL_ENABLE failed (%s)", strerror(-err));
if (!err) {
mEnabled = newState;
if (en) {
setInitialState();
}
}
if (!mEnabled) {
close_device();
}
}
return err;
}

bool ProximitySensor::hasPendingEvents() const {
return mHasPendingEvent;
}

int ProximitySensor::readEvents(sensors_event_t* data, int count)
{
if (count < 1)
return -EINVAL;

if (mHasPendingEvent) {
mHasPendingEvent = false;
mPendingEvent.timestamp = getTimestamp();
*data = mPendingEvent;
return mEnabled ? 1 : 0;
}

ssize_t n = mInputReader.fill(data_fd);
if (n < 0)
return n;

int numEventReceived = 0;
input_event const* event;

while (count && mInputReader.readEvent(&event)) {
int type = event->type;
if (type == EV_ABS) {
if (event->code == EVENT_TYPE_PROXIMITY) {
mPendingEvent.distance = indexToValue(event->value);
}
} else if (type == EV_SYN) {
mPendingEvent.timestamp = timevalToNano(event->time);
if (mEnabled) {
*data++ = mPendingEvent;
count--;
numEventReceived++;
}
} else {
LOGE("ProximitySensor: unknown event (type=%d, code=%d)",
type, event->code);
}
mInputReader.next();
}

return numEventReceived;
}

float ProximitySensor::indexToValue(size_t index) const
{
return index * PROXIMITY_THRESHOLD_CM;
}
52 changes: 52 additions & 0 deletions libsensors/ProximitySensor.h
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/*
* Copyright (C) 2008 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.
*/

#ifndef ANDROID_PROXIMITY_SENSOR_H
#define ANDROID_PROXIMITY_SENSOR_H

#include <stdint.h>
#include <errno.h>
#include <sys/cdefs.h>
#include <sys/types.h>

#include "nusensors.h"
#include "SensorBase.h"
#include "InputEventReader.h"

/*****************************************************************************/

struct input_event;

class ProximitySensor : public SensorBase {
int mEnabled;
InputEventCircularReader mInputReader;
sensors_event_t mPendingEvent;
bool mHasPendingEvent;

int setInitialState();
float indexToValue(size_t index) const;

public:
ProximitySensor();
virtual ~ProximitySensor();
virtual int readEvents(sensors_event_t* data, int count);
virtual bool hasPendingEvents() const;
virtual int enable(int32_t handle, int enabled);
};

/*****************************************************************************/

#endif // ANDROID_PROXIMITY_SENSOR_H
122 changes: 122 additions & 0 deletions libsensors/SensorBase.cpp
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/*
* Copyright (C) 2008 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 <fcntl.h>
#include <errno.h>
#include <math.h>
#include <poll.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/select.h>

#include <cutils/log.h>

#include <linux/input.h>

#include "SensorBase.h"

/*****************************************************************************/

SensorBase::SensorBase(
const char* dev_name,
const char* data_name)
: dev_name(dev_name), data_name(data_name),
dev_fd(-1), data_fd(-1)
{
data_fd = openInput(data_name);
}

SensorBase::~SensorBase() {
if (data_fd >= 0) {
close(data_fd);
}
if (dev_fd >= 0) {
close(dev_fd);
}
}

int SensorBase::open_device() {
if (dev_fd<0 && dev_name) {
dev_fd = open(dev_name, O_RDONLY);
LOGE_IF(dev_fd<0, "Couldn't open %s (%s)", dev_name, strerror(errno));
}
return 0;
}

int SensorBase::close_device() {
if (dev_fd >= 0) {
close(dev_fd);
dev_fd = -1;
}
return 0;
}

int SensorBase::getFd() const {
return data_fd;
}

int SensorBase::setDelay(int32_t handle, int64_t ns) {
return 0;
}

bool SensorBase::hasPendingEvents() const {
return false;
}

int64_t SensorBase::getTimestamp() {
struct timespec t;
t.tv_sec = t.tv_nsec = 0;
clock_gettime(CLOCK_MONOTONIC, &t);
return int64_t(t.tv_sec)*1000000000LL + t.tv_nsec;
}

int SensorBase::openInput(const char* inputName) {
int fd = -1;
const char *dirname = "/dev/input";
char devname[PATH_MAX];
char *filename;
DIR *dir;
struct dirent *de;
dir = opendir(dirname);
if(dir == NULL)
return -1;
strcpy(devname, dirname);
filename = devname + strlen(devname);
*filename++ = '/';
while((de = readdir(dir))) {
if(de->d_name[0] == '.' &&
(de->d_name[1] == '\0' ||
(de->d_name[1] == '.' && de->d_name[2] == '\0')))
continue;
strcpy(filename, de->d_name);
fd = open(devname, O_RDONLY);
if (fd>=0) {
char name[80];
if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) {
name[0] = '\0';
}
if (!strcmp(name, inputName)) {
break;
} else {
close(fd);
fd = -1;
}
}
}
closedir(dir);
LOGE_IF(fd<0, "couldn't find '%s' input device", inputName);
return fd;
}
64 changes: 64 additions & 0 deletions libsensors/SensorBase.h
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/*
* Copyright (C) 2008 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.
*/

#ifndef ANDROID_SENSOR_BASE_H
#define ANDROID_SENSOR_BASE_H

#include <stdint.h>
#include <errno.h>
#include <sys/cdefs.h>
#include <sys/types.h>


/*****************************************************************************/

struct sensors_event_t;

class SensorBase {
protected:
const char* dev_name;
const char* data_name;
int dev_fd;
int data_fd;

static int openInput(const char* inputName);
static int64_t getTimestamp();


static int64_t timevalToNano(timeval const& t) {
return t.tv_sec*1000000000LL + t.tv_usec*1000;
}

int open_device();
int close_device();

public:
SensorBase(
const char* dev_name,
const char* data_name);

virtual ~SensorBase();

virtual int readEvents(sensors_event_t* data, int count) = 0;
virtual bool hasPendingEvents() const;
virtual int getFd() const;
virtual int setDelay(int32_t handle, int64_t ns);
virtual int enable(int32_t handle, int enabled) = 0;
};

/*****************************************************************************/

#endif // ANDROID_SENSOR_BASE_H
217 changes: 217 additions & 0 deletions libsensors/nusensors.cpp
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/*
* Copyright (C) 2008 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 <hardware/sensors.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <math.h>

#include <poll.h>
#include <pthread.h>

#include <linux/input.h>

#include <cutils/atomic.h>
#include <cutils/log.h>

#include "nusensors.h"
//#include "LightSensor.h"
//#include "ProximitySensor.h"
#include "AkmSensor.h"

/*****************************************************************************/

struct sensors_poll_context_t {
struct sensors_poll_device_t device; // must be first

sensors_poll_context_t();
~sensors_poll_context_t();
int activate(int handle, int enabled);
int setDelay(int handle, int64_t ns);
int pollEvents(sensors_event_t* data, int count);

private:
enum {
//light = 0,
//proximity = 1,
akm = 0,
numSensorDrivers,
numFds,
};

static const size_t wake = numFds - 1;
static const char WAKE_MESSAGE = 'W';
struct pollfd mPollFds[numFds];
int mWritePipeFd;
SensorBase* mSensors[numSensorDrivers];

int handleToDriver(int handle) const {
switch (handle) {
case ID_A:
case ID_M:
case ID_O:
case ID_T:
return akm;
}
return -EINVAL;
}
};

/*****************************************************************************/

sensors_poll_context_t::sensors_poll_context_t()
{
mSensors[akm] = new AkmSensor();
mPollFds[akm].fd = mSensors[akm]->getFd();
mPollFds[akm].events = POLLIN;
mPollFds[akm].revents = 0;

int wakeFds[2];
int result = pipe(wakeFds);
LOGE_IF(result<0, "error creating wake pipe (%s)", strerror(errno));
fcntl(wakeFds[0], F_SETFL, O_NONBLOCK);
fcntl(wakeFds[1], F_SETFL, O_NONBLOCK);
mWritePipeFd = wakeFds[1];

mPollFds[wake].fd = wakeFds[0];
mPollFds[wake].events = POLLIN;
mPollFds[wake].revents = 0;
}

sensors_poll_context_t::~sensors_poll_context_t() {
for (int i=0 ; i<numSensorDrivers ; i++) {
delete mSensors[i];
}
close(mPollFds[wake].fd);
close(mWritePipeFd);
}

int sensors_poll_context_t::activate(int handle, int enabled) {
int index = handleToDriver(handle);
if (index < 0) return index;
int err = mSensors[index]->enable(handle, enabled);
if (enabled && !err) {
const char wakeMessage(WAKE_MESSAGE);
int result = write(mWritePipeFd, &wakeMessage, 1);
LOGE_IF(result<0, "error sending wake message (%s)", strerror(errno));
}
return err;
}

int sensors_poll_context_t::setDelay(int handle, int64_t ns) {

int index = handleToDriver(handle);
if (index < 0) return index;
return mSensors[index]->setDelay(handle, ns);
}

int sensors_poll_context_t::pollEvents(sensors_event_t* data, int count)
{
int nbEvents = 0;
int n = 0;

do {
// see if we have some leftover from the last poll()
for (int i=0 ; count && i<numSensorDrivers ; i++) {
SensorBase* const sensor(mSensors[i]);
if ((mPollFds[i].revents & POLLIN) || (sensor->hasPendingEvents())) {
int nb = sensor->readEvents(data, count);
if (nb < count) {
// no more data for this sensor
mPollFds[i].revents = 0;
}
count -= nb;
nbEvents += nb;
data += nb;
}
}

if (count) {
// we still have some room, so try to see if we can get
// some events immediately or just wait if we don't have
// anything to return
n = poll(mPollFds, numFds, nbEvents ? 0 : -1);
if (n<0) {
LOGE("poll() failed (%s)", strerror(errno));
return -errno;
}
if (mPollFds[wake].revents & POLLIN) {
char msg;
int result = read(mPollFds[wake].fd, &msg, 1);
LOGE_IF(result<0, "error reading from wake pipe (%s)", strerror(errno));
LOGE_IF(msg != WAKE_MESSAGE, "unknown message on wake queue (0x%02x)", int(msg));
mPollFds[wake].revents = 0;
}
}
// if we have events and space, go read them
} while (n && count);

return nbEvents;
}

/*****************************************************************************/

static int poll__close(struct hw_device_t *dev)
{
sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
if (ctx) {
delete ctx;
}
return 0;
}

static int poll__activate(struct sensors_poll_device_t *dev,
int handle, int enabled) {
sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
return ctx->activate(handle, enabled);
}

static int poll__setDelay(struct sensors_poll_device_t *dev,
int handle, int64_t ns) {
sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
return ctx->setDelay(handle, ns);
}

static int poll__poll(struct sensors_poll_device_t *dev,
sensors_event_t* data, int count) {
sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
return ctx->pollEvents(data, count);
}

/*****************************************************************************/

int init_nusensors(hw_module_t const* module, hw_device_t** device)
{
int status = -EINVAL;

LOGD("init_nusensors");

sensors_poll_context_t *dev = new sensors_poll_context_t();
memset(&dev->device, 0, sizeof(sensors_poll_device_t));

dev->device.common.tag = HARDWARE_DEVICE_TAG;
dev->device.common.version = 0;
dev->device.common.module = const_cast<hw_module_t*>(module);
dev->device.common.close = poll__close;
dev->device.activate = poll__activate;
dev->device.setDelay = poll__setDelay;
dev->device.poll = poll__poll;

*device = &dev->device.common;
status = 0;
return status;
}
102 changes: 102 additions & 0 deletions libsensors/nusensors.h
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/*
* Copyright (C) 2008 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.
*/

#ifndef ANDROID_SENSORS_H
#define ANDROID_SENSORS_H

#include <stdint.h>
#include <errno.h>
#include <sys/cdefs.h>
#include <sys/types.h>

#include <linux/input.h>

#include <hardware/hardware.h>
#include <hardware/sensors.h>

__BEGIN_DECLS

/*****************************************************************************/

int init_nusensors(hw_module_t const* module, hw_device_t** device);

/*****************************************************************************/

#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))

#define ID_A (0)
#define ID_M (1)
#define ID_O (2)
#define ID_T (3)

/*****************************************************************************/

/*
* The SENSORS Module
*/

/*****************************************************************************/

#define AKM_DEVICE_NAME "/dev/akm8976_aot"
#define LS_DEVICE_NAME "/dev/lightsensor"

#define EVENT_TYPE_ACCEL_X ABS_X
#define EVENT_TYPE_ACCEL_Y ABS_Z
#define EVENT_TYPE_ACCEL_Z ABS_Y
#define EVENT_TYPE_ACCEL_STATUS ABS_WHEEL

#define EVENT_TYPE_YAW ABS_RX
#define EVENT_TYPE_PITCH ABS_RY
#define EVENT_TYPE_ROLL ABS_RZ
#define EVENT_TYPE_ORIENT_STATUS ABS_RUDDER

#define EVENT_TYPE_MAGV_X ABS_HAT0X
#define EVENT_TYPE_MAGV_Y ABS_HAT0Y
#define EVENT_TYPE_MAGV_Z ABS_BRAKE

#define EVENT_TYPE_TEMPERATURE ABS_THROTTLE
#define EVENT_TYPE_STEP_COUNT ABS_GAS
#define EVENT_TYPE_PROXIMITY ABS_DISTANCE
#define EVENT_TYPE_LIGHT ABS_MISC

// 720 LSG = 1G
#define LSG (720.0f)


// conversion of acceleration data to SI units (m/s^2)
#define CONVERT_A (GRAVITY_EARTH / LSG)
#define CONVERT_A_X (-CONVERT_A)
#define CONVERT_A_Y (CONVERT_A)
#define CONVERT_A_Z (-CONVERT_A)

// conversion of magnetic data to uT units
#define CONVERT_M (1.0f/16.0f)
#define CONVERT_M_X (-CONVERT_M)
#define CONVERT_M_Y (-CONVERT_M)
#define CONVERT_M_Z (CONVERT_M)

#define CONVERT_O (1.0f)
#define CONVERT_O_Y (CONVERT_O)
#define CONVERT_O_P (CONVERT_O)
#define CONVERT_O_R (-CONVERT_O)

#define SENSOR_STATE_MASK (0x7FFF)

/*****************************************************************************/

__END_DECLS

#endif // ANDROID_SENSORS_H
560 changes: 24 additions & 536 deletions libsensors/sensors.c
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