n7100: Bring back open source sensors

This reverts commit 00ac0f43785afd63a16b74034f4701928e941360.

Change-Id: I810bad7b533d8c8edf0152b36874789e02994bad

n7100: sensors: Fix buffer size
Change-Id: I93a999a47ade6982c0b1fec56d611465f8dad830

Conflicts:
	n7100.mk

20 files changed, 2393 insertions, 0 deletions

diff --git a/libsensors/AccelSensor.cpp b/libsensors/AccelSensor.cpp
new file mode 100644
index 0000000..2d02bc7
--- /dev/null
+++ b/libsensors/AccelSensor.cpp
@@ -0,0 +1,155 @@
+/*
+ * 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 "AccelSensor.h"
+
+#define LOGTAG "AccelerometerSensor"
+
+/*****************************************************************************/
+AccelSensor::AccelSensor()
+    : SensorBase(NULL, "accelerometer_sensor"),
+      mEnabled(0),
+
+      mInputReader(4),
+      mHasPendingEvent(false)
+{
+    mPendingEvent.version = sizeof(sensors_event_t);
+    mPendingEvent.sensor = ID_A;
+    mPendingEvent.type = SENSOR_TYPE_ACCELEROMETER;
+    memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));
+
+    if (data_fd) {
+        strcpy(input_sysfs_path, "/sys/class/input/");
+        strcat(input_sysfs_path, input_name);
+        strcat(input_sysfs_path, "/device/");
+        input_sysfs_path_len = strlen(input_sysfs_path);
+    }
+}
+
+AccelSensor::~AccelSensor() {
+
+  //  ALOGD("AccelSensor::~AccelSensor()");
+    if (mEnabled) {
+        enable(0, 0);
+    }
+}
+
+int AccelSensor::setInitialState()
+{
+    return 0;
+}
+
+int AccelSensor::enable(int32_t handle, int en) {
+    int flags = en ? 1 : 0;
+    int err;
+    if (flags != mEnabled) {
+         err = sspEnable(LOGTAG, SSP_ACCEL, en);
+         if(err >= 0){
+             mEnabled = flags;
+             setInitialState();
+
+             return 0;
+         }
+         return -1;
+    }
+    return 0;
+}
+
+
+bool AccelSensor::hasPendingEvents() const {
+    /* FIXME probably here should be returning mEnabled but instead
+      mHasPendingEvents. It does not work, so we cheat.*/
+    //ALOGD("AccelSensor::~hasPendingEvents %d", mHasPendingEvent ? 1 : 0 );
+    return mHasPendingEvent;
+}
+
+
+int AccelSensor::setDelay(int32_t handle, int64_t ns)
+{
+    int fd;
+
+    if (ns < 10000000) {
+        ns = 10000000; // Minimum on stock
+    }
+
+    strcpy(&input_sysfs_path[input_sysfs_path_len], "acc_poll_delay");
+    fd = open(input_sysfs_path, O_RDWR);
+    if (fd >= 0) {
+        char buf[80];
+        sprintf(buf, "%lld", ns / 10000000 * 10); // Some flooring to match stock value
+        write(fd, buf, strlen(buf)+1);
+        close(fd);
+        return 0;
+    }
+    return -1;
+}
+
+
+int AccelSensor::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_REL) {
+            float value = event->value;
+            if (event->code == EVENT_TYPE_ACCEL_X) {
+                mPendingEvent.acceleration.x = value * CONVERT_A_X;
+            } else if (event->code == EVENT_TYPE_ACCEL_Y) {
+                mPendingEvent.acceleration.y = value * CONVERT_A_Y;
+            } else if (event->code == EVENT_TYPE_ACCEL_Z) {
+                mPendingEvent.acceleration.z = value * CONVERT_A_Z;
+            }
+        } else if (type == EV_SYN) {
+            mPendingEvent.timestamp = timevalToNano(event->time);
+            if (mEnabled) {
+                *data++ = mPendingEvent;
+                count--;
+                numEventReceived++;
+            }
+        } else {
+            ALOGE("%s: unknown event (type=%d, code=%d)", LOGTAG,
+                    type, event->code);
+        }
+
+        mInputReader.next();
+    }
+    return numEventReceived++;
+
+}
diff --git a/libsensors/AccelSensor.h b/libsensors/AccelSensor.h
new file mode 100644
index 0000000..0162147
--- /dev/null
+++ b/libsensors/AccelSensor.h
@@ -0,0 +1,70 @@
+/*
+ * 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_SMB380_SENSOR_H
+#define ANDROID_SMB380_SENSOR_H
+
+#include <stdint.h>
+#include <errno.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include "sensors.h"
+#include "SensorBase.h"
+#include "InputEventReader.h"
+
+/*****************************************************************************/
+
+
+struct smb380acc_t {
+		short x, /**< holds x-axis acceleration data sign extended. Range -512 to 511. */
+		      y, /**< holds y-axis acceleration data sign extended. Range -512 to 511. */
+		      z; /**< holds z-axis acceleration data sign extended. Range -512 to 511. */
+} ;
+
+/* smb ioctl command label */
+#define IOCTL_SMB_GET_ACC_VALUE		0
+#define DCM_IOC_MAGIC			's'
+#define IOC_SET_ACCELEROMETER	_IO (DCM_IOC_MAGIC, 0x64)
+#define BMA150_CALIBRATION		_IOWR(DCM_IOC_MAGIC,48,short)
+
+#define SMB_POWER_OFF               0
+#define SMB_POWER_ON                1
+
+struct input_event;
+
+class AccelSensor : public SensorBase {
+    int mEnabled;
+    InputEventCircularReader mInputReader;
+    sensors_event_t mPendingEvent;
+    bool mHasPendingEvent;
+    char input_sysfs_path[PATH_MAX];
+    int input_sysfs_path_len;
+
+    int setInitialState();
+
+public:
+            AccelSensor();
+    virtual ~AccelSensor();
+    virtual int readEvents(sensors_event_t* data, int count);
+    virtual bool hasPendingEvents() const;
+    virtual int setDelay(int32_t handle, int64_t ns);
+    virtual int enable(int32_t handle, int enabled);
+};
+
+/*****************************************************************************/
+
+#endif  // ANDROID_GYRO_SENSOR_H
diff --git a/libsensors/AkmSensor.cpp b/libsensors/AkmSensor.cpp
new file mode 100644
index 0000000..baca688
--- /dev/null
+++ b/libsensors/AkmSensor.cpp
@@ -0,0 +1,274 @@
+/*
+ * 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 <dlfcn.h>
+
+#include <cutils/log.h>
+#include "AkmSensor.h"
+
+#define LOGTAG "AkmSensor"
+
+//#define ALOG_NDEBUG 0
+
+/*****************************************************************************/
+
+int (*akm_is_sensor_enabled)(uint32_t sensor_type);
+int (*akm_enable_sensor)(uint32_t sensor_type);
+int (*akm_disable_sensor)(uint32_t sensor_type);
+int (*akm_set_delay)(uint32_t sensor_type, uint64_t delay);
+
+int stub_is_sensor_enabled(uint32_t sensor_type) {
+    return 0;
+}
+
+int stub_enable_disable_sensor(uint32_t sensor_type) {
+    return -ENODEV;
+}
+
+int stub_set_delay(uint32_t sensor_type, uint64_t delay) {
+    return -ENODEV;
+}
+
+
+AkmSensor::AkmSensor()
+: SensorBase(NULL, NULL),
+      mEnabled(0),
+      mPendingMask(0),
+      mInputReader(32)
+{
+    /* Open the library before opening the input device.  The library
+     * creates a uinput device.
+     */
+    if (loadAKMLibrary() == 0) {
+        data_name = "compass_sensor";
+        data_fd = openInput("compass_sensor");
+    }
+
+    //Incase first time fails
+    if(data_fd < 0){
+         ALOGI("%s: retrying to open compass sensor", LOGTAG);
+         data_fd = openInput("compass_sensor");
+    }
+
+    if(data_fd > 0){
+         ALOGI("%s: compass sensor successfully opened: %i", LOGTAG, data_fd);
+    }else{
+         ALOGI("%s: failed to open compass sensor", LOGTAG);
+    }
+
+    memset(mPendingEvents, 0, sizeof(mPendingEvents));
+
+    mPendingEvents[MagneticField].version = sizeof(sensors_event_t);
+    mPendingEvents[MagneticField].sensor = ID_M;
+    mPendingEvents[MagneticField].type = SENSOR_TYPE_MAGNETIC_FIELD;
+    mPendingEvents[MagneticField].magnetic.status = SENSOR_STATUS_ACCURACY_HIGH;
+
+    // read the actual value of all sensors if they're enabled already
+    struct input_absinfo absinfo;
+    short flags = 0;
+    if (akm_is_sensor_enabled(SENSOR_TYPE_MAGNETIC_FIELD))  {
+        mEnabled |= 1<<MagneticField;
+        if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_MAGV_X), &absinfo)) {
+            mPendingEvents[MagneticField].magnetic.x = absinfo.value * CONVERT_M_X;
+        }
+        if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_MAGV_Y), &absinfo)) {
+            mPendingEvents[MagneticField].magnetic.y = absinfo.value * CONVERT_M_Y;
+        }
+        if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_MAGV_Z), &absinfo)) {
+            mPendingEvents[MagneticField].magnetic.z = absinfo.value * CONVERT_M_Z;
+        }
+    }
+}
+
+AkmSensor::~AkmSensor()
+{
+    if (mLibAKM) {
+        unsigned ref = ::dlclose(mLibAKM);
+    }
+}
+
+int AkmSensor::setInitialState()
+{
+    return 0;
+}
+
+int AkmSensor::enable(int32_t handle, int en)
+{
+    int what = -1;
+
+    switch (handle) {
+        case ID_M: what = MagneticField; break;
+        case ID_O: what = Orientation;   break;
+    }
+
+    if (uint32_t(what) >= numSensors)
+        return -EINVAL;
+
+    int newState  = en ? 1 : 0;
+    int err = 0;
+
+    if ((uint32_t(newState)<<what) != (mEnabled & (1<<what))) {
+
+        uint32_t sensor_type;
+
+        switch (what) {
+            case MagneticField: sensor_type = SENSOR_TYPE_MAGNETIC_FIELD; break;
+        }
+        short flags = newState;
+        if (en){
+            err = akm_enable_sensor(sensor_type);
+        }else{
+            err = akm_disable_sensor(sensor_type);
+        }
+
+        err = sspEnable(LOGTAG, SSP_MAG, en);
+        setInitialState();
+
+        ALOGE_IF(err, "Could not change sensor state (%s)", strerror(-err));
+        if (!err) {
+            mEnabled &= ~(1<<what);
+            mEnabled |= (uint32_t(flags)<<what);
+        }
+    }
+    return err;
+}
+
+int AkmSensor::setDelay(int32_t handle, int64_t ns)
+{
+    int what = -1;
+    int fd;
+    uint32_t sensor_type = 0;
+
+    if (ns < 0)
+        return -EINVAL;
+
+    switch (handle) {
+        case ID_M: sensor_type = SENSOR_TYPE_MAGNETIC_FIELD; break;
+    }
+
+    if (sensor_type == 0)
+        return -EINVAL;
+
+    fd = open("/sys/class/sensors/ssp_sensor/mag_poll_delay", O_RDWR);
+    if (fd >= 0) {
+        char buf[80];
+        sprintf(buf, "%lld", ns);
+        write(fd, buf, strlen(buf)+1);
+        close(fd);
+     }
+
+    fd = open("/sys/class/sensors/ssp_sensor/ori_poll_delay", O_RDWR);
+    if (fd >= 0) {
+        char buf[80];
+        sprintf(buf, "%lld", ns);
+        write(fd, buf, strlen(buf)+1);
+        close(fd);
+     }
+
+    mDelays[what] = ns;
+    return 0;
+}
+
+int AkmSensor::loadAKMLibrary()
+{
+    mLibAKM = dlopen("libakm.so", RTLD_NOW);
+
+    if (!mLibAKM) {
+        akm_is_sensor_enabled = stub_is_sensor_enabled;
+        akm_enable_sensor = stub_enable_disable_sensor;
+        akm_disable_sensor = stub_enable_disable_sensor;
+        akm_set_delay = stub_set_delay;
+        ALOGE("%s: unable to load AKM Library, %s", LOGTAG, dlerror());
+        return -ENOENT;
+    }
+
+    *(void **)&akm_is_sensor_enabled = dlsym(mLibAKM, "akm_is_sensor_enabled");
+    *(void **)&akm_enable_sensor = dlsym(mLibAKM, "akm_enable_sensor");
+    *(void **)&akm_disable_sensor = dlsym(mLibAKM, "akm_disable_sensor");
+    *(void **)&akm_set_delay = dlsym(mLibAKM, "akm_set_delay");
+
+    return 0;
+}
+
+int AkmSensor::readEvents(sensors_event_t* data, int count)
+{
+    if (count < 1)
+        return -EINVAL;
+
+    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_REL) {
+            processEvent(event->code, event->value);
+            mInputReader.next();
+        } else if (type == EV_ABS) {
+            processEvent(event->code, event->value);
+            mInputReader.next();
+        } else if (type == EV_SYN) {
+            int64_t time = timevalToNano(event->time);
+            for (int j=0 ; count && mPendingMask && j<numSensors ; j++) {
+                if (mPendingMask & (1<<j)) {
+                    mPendingMask &= ~(1<<j);
+                    mPendingEvents[j].timestamp = time;
+                    if (mEnabled & (1<<j)) {
+                        *data++ = mPendingEvents[j];
+                        count--;
+                        numEventReceived++;
+                    }
+                }
+            }
+            if (!mPendingMask) {
+                mInputReader.next();
+            }
+        } else {
+            ALOGE("%s: unknown event (type=%d, code=%d)", LOGTAG,
+                    type, event->code);
+            mInputReader.next();
+        }
+    }
+    return numEventReceived;
+}
+
+void AkmSensor::processEvent(int code, int value)
+{
+    switch (code) {
+        case EVENT_TYPE_MAGV_X:
+            mPendingMask |= 1<<MagneticField;
+            mPendingEvents[MagneticField].magnetic.x = value * CONVERT_M_X;
+            break;
+        case EVENT_TYPE_MAGV_Y:
+            mPendingMask |= 1<<MagneticField;
+            mPendingEvents[MagneticField].magnetic.y = value * CONVERT_M_Y;
+            break;
+        case EVENT_TYPE_MAGV_Z:
+            mPendingMask |= 1<<MagneticField;
+            mPendingEvents[MagneticField].magnetic.z = value * CONVERT_M_Z;
+            break;
+    }
+}
diff --git a/libsensors/AkmSensor.h b/libsensors/AkmSensor.h
new file mode 100644
index 0000000..8d488f5
--- /dev/null
+++ b/libsensors/AkmSensor.h
@@ -0,0 +1,66 @@
+/*
+ * 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_AKM_SENSOR_H
+#define ANDROID_AKM_SENSOR_H
+
+#include <stdint.h>
+#include <errno.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+
+#include "sensors.h"
+#include "SensorBase.h"
+#include "InputEventReader.h"
+
+/*****************************************************************************/
+
+struct input_event;
+
+class AkmSensor : public SensorBase {
+public:
+            AkmSensor();
+    virtual ~AkmSensor();
+
+    enum {
+        Accelerometer   = 0,
+        MagneticField   = 1,
+        Orientation     = 2,
+        numSensors
+    };
+
+    virtual int setDelay(int32_t handle, int64_t ns);
+    virtual int enable(int32_t handle, int enabled);
+    virtual int readEvents(sensors_event_t* data, int count);
+    void processEvent(int code, int value);
+
+    int setInitialState();
+
+private:
+    int loadAKMLibrary();
+    int update_delay();
+    void *mLibAKM;
+    uint32_t mEnabled;
+    uint32_t mPendingMask;
+    InputEventCircularReader mInputReader;
+    sensors_event_t mPendingEvents[numSensors];
+    uint64_t mDelays[numSensors];
+};
+
+/*****************************************************************************/
+
+#endif  // ANDROID_AKM_SENSOR_H
diff --git a/libsensors/Android.mk b/libsensors/Android.mk
new file mode 100644
index 0000000..47a90e5
--- /dev/null
+++ b/libsensors/Android.mk
@@ -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.
+
+
+LOCAL_PATH := $(call my-dir)
+
+ifneq ($(TARGET_SIMULATOR),true)
+
+# HAL module implemenation, not prelinked, and stored in
+# hw/<SENSORS_HARDWARE_MODULE_ID>.<ro.product.board>.so
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := sensors.$(TARGET_BOOTLOADER_BOARD_NAME)
+
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_CFLAGS := -DALOG_TAG=\"Sensors\"
+LOCAL_SRC_FILES := 						\
+				sensors.cpp 			\
+				SensorBase.cpp			\
+				LightSensor.cpp			\
+				ProximitySensor.cpp		\
+				AkmSensor.cpp                   \
+				GyroSensor.cpp                  \
+                                InputEventReader.cpp            \
+                                AccelSensor.cpp                 \
+                                PressureSensor.cpp
+
+LOCAL_SHARED_LIBRARIES := liblog libcutils libdl
+LOCAL_PRELINK_MODULE := false
+
+include $(BUILD_SHARED_LIBRARY)
+
+endif # !TARGET_SIMULATOR
diff --git a/libsensors/GyroSensor.cpp b/libsensors/GyroSensor.cpp
new file mode 100644
index 0000000..d6dc944
--- /dev/null
+++ b/libsensors/GyroSensor.cpp
@@ -0,0 +1,177 @@
+/*
+ * 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 "GyroSensor.h"
+
+#define LOGTAG "GyroSensor"
+
+#define FETCH_FULL_EVENT_BEFORE_RETURN 1
+#define IGNORE_EVENT_TIME 350000000
+/*****************************************************************************/
+
+GyroSensor::GyroSensor()
+    : SensorBase(NULL, "gyro_sensor"),
+      mEnabled(0),
+      mInputReader(4),
+      mHasPendingEvent(false),
+      mEnabledTime(0)
+{
+    mPendingEvent.version = sizeof(sensors_event_t);
+    mPendingEvent.sensor = ID_GY;
+    mPendingEvent.type = SENSOR_TYPE_GYROSCOPE;
+    memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));
+
+    if (data_fd) {
+        strcpy(input_sysfs_path, "/sys/class/input/");
+        strcat(input_sysfs_path, input_name);
+        strcat(input_sysfs_path, "/device/");
+        input_sysfs_path_len = strlen(input_sysfs_path);
+        enable(0, 1);
+    }
+}
+
+GyroSensor::~GyroSensor() {
+    if (mEnabled) {
+        enable(0, 0);
+    }
+}
+
+int GyroSensor::setInitialState() {
+    struct input_absinfo absinfo_x;
+    struct input_absinfo absinfo_y;
+    struct input_absinfo absinfo_z;
+    float value;
+    if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_GYRO_X), &absinfo_x) &&
+        !ioctl(data_fd, EVIOCGABS(EVENT_TYPE_GYRO_X), &absinfo_y) &&
+        !ioctl(data_fd, EVIOCGABS(EVENT_TYPE_GYRO_X), &absinfo_z)) {
+        value = absinfo_x.value;
+        mPendingEvent.data[0] = value * CONVERT_GYRO_X;
+        value = absinfo_x.value;
+        mPendingEvent.data[1] = value * CONVERT_GYRO_Y;
+        value = absinfo_x.value;
+        mPendingEvent.data[2] = value * CONVERT_GYRO_Z;
+        mHasPendingEvent = true;
+    }
+    return 0;
+}
+
+int GyroSensor::enable(int32_t handle, int en) {
+    int flags = en ? 1 : 0;
+    int err;
+    if (flags != mEnabled) {
+         if(err >= 0){
+             mEnabled = flags;
+             err = sspEnable(LOGTAG, SSP_GYRO, en);
+             setInitialState();
+
+             return 0;
+         }
+         return -1;
+    }
+    return 0;
+}
+
+bool GyroSensor::hasPendingEvents() const {
+    return mHasPendingEvent;
+}
+
+int GyroSensor::setDelay(int32_t handle, int64_t ns)
+{
+    int fd;
+
+    strcpy(&input_sysfs_path[input_sysfs_path_len], "gyro_poll_delay");
+    fd = open(input_sysfs_path, O_RDWR);
+    if (fd >= 0) {
+        char buf[80];
+        sprintf(buf, "%lld", ns);
+        write(fd, buf, strlen(buf)+1);
+        close(fd);
+        return 0;
+    }
+    return -1;
+}
+
+int GyroSensor::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;
+
+#if FETCH_FULL_EVENT_BEFORE_RETURN
+again:
+#endif
+    while (count && mInputReader.readEvent(&event)) {
+        int type = event->type;
+        if (type == EV_REL) {
+            float value = event->value;
+            if (event->code == EVENT_TYPE_GYRO_X) {
+                mPendingEvent.data[0] = value * CONVERT_GYRO_X;
+            } else if (event->code == EVENT_TYPE_GYRO_Y) {
+                mPendingEvent.data[1] = value * CONVERT_GYRO_Y;
+            } else if (event->code == EVENT_TYPE_GYRO_Z) {
+                mPendingEvent.data[2] = value * CONVERT_GYRO_Z;
+            }
+        } else if (type == EV_SYN) {
+            mPendingEvent.timestamp = timevalToNano(event->time);
+            if (mEnabled) {
+                if (mPendingEvent.timestamp >= mEnabledTime) {
+                    *data++ = mPendingEvent;
+                    numEventReceived++;
+                }
+                count--;
+            }
+        } else {
+            ALOGE("%s: unknown event (type=%d, code=%d)", LOGTAG,
+                    type, event->code);
+        }
+        mInputReader.next();
+    }
+
+#if FETCH_FULL_EVENT_BEFORE_RETURN
+    /* if we didn't read a complete event, see if we can fill and
+       try again instead of returning with nothing and redoing poll. */
+    if (numEventReceived == 0 && mEnabled == 1) {
+        n = mInputReader.fill(data_fd);
+        if (n)
+            goto again;
+    }
+#endif
+
+    return numEventReceived;
+}
+
diff --git a/libsensors/GyroSensor.h b/libsensors/GyroSensor.h
new file mode 100644
index 0000000..e8997de
--- /dev/null
+++ b/libsensors/GyroSensor.h
@@ -0,0 +1,55 @@
+/*
+ * 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_GYRO_SENSOR_H
+#define ANDROID_GYRO_SENSOR_H
+
+#include <stdint.h>
+#include <errno.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include "sensors.h"
+#include "SensorBase.h"
+#include "InputEventReader.h"
+
+/*****************************************************************************/
+
+struct input_event;
+
+class GyroSensor : public SensorBase {
+    int mEnabled;
+    InputEventCircularReader mInputReader;
+    sensors_event_t mPendingEvent;
+    bool mHasPendingEvent;
+    char input_sysfs_path[PATH_MAX];
+    int input_sysfs_path_len;
+    int64_t mEnabledTime;
+
+    int setInitialState();
+
+public:
+            GyroSensor();
+    virtual ~GyroSensor();
+    virtual int readEvents(sensors_event_t* data, int count);
+    virtual bool hasPendingEvents() const;
+    virtual int setDelay(int32_t handle, int64_t ns);
+    virtual int enable(int32_t handle, int enabled);
+};
+
+/*****************************************************************************/
+
+#endif  // ANDROID_GYRO_SENSOR_H
diff --git a/libsensors/InputEventReader.cpp b/libsensors/InputEventReader.cpp
new file mode 100644
index 0000000..1014f29
--- /dev/null
+++ b/libsensors/InputEventReader.cpp
@@ -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;
+    }
+}
diff --git a/libsensors/InputEventReader.h b/libsensors/InputEventReader.h
new file mode 100644
index 0000000..180aade
--- /dev/null
+++ b/libsensors/InputEventReader.h
@@ -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
diff --git a/libsensors/LightSensor.cpp b/libsensors/LightSensor.cpp
new file mode 100644
index 0000000..856000b
--- /dev/null
+++ b/libsensors/LightSensor.cpp
@@ -0,0 +1,150 @@
+/*
+ * 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"
+
+#define LOGTAG "LightSensor"
+
+// #define ALOG_NDEBUG 0
+
+/*****************************************************************************/
+
+LightSensor::LightSensor()
+    : SensorBase(NULL, "light_sensor"),
+      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));
+
+    if (data_fd) {
+        strcpy(input_sysfs_path, "/sys/class/input/");
+        strcat(input_sysfs_path, input_name);
+        strcat(input_sysfs_path, "/device/");
+        input_sysfs_path_len = strlen(input_sysfs_path);
+        enable(0, 1);
+    }
+}
+
+LightSensor::~LightSensor() {
+     if (mEnabled) {
+        enable(0, 0);
+    }
+}
+
+int LightSensor::setInitialState() {
+    struct input_absinfo absinfo;
+    if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_LIGHT), &absinfo)) {
+        // make sure to report an event immediately
+        mHasPendingEvent = true;
+        mPendingEvent.light = absinfo.value;
+    }
+    return 0;
+}
+
+int LightSensor::setDelay(int32_t handle, int64_t ns)
+{
+    int fd;
+
+    strcpy(&input_sysfs_path[input_sysfs_path_len], "light_poll_delay");
+    fd = open(input_sysfs_path, O_RDWR);
+    if (fd >= 0) {
+        char buf[80];
+        sprintf(buf, "%lld", ns);
+        write(fd, buf, strlen(buf)+1);
+        close(fd);
+        return 0;
+    }
+    return -1;
+}
+
+int LightSensor::enable(int32_t handle, int en)
+{
+    int flags = en ? 1 : 0;
+    int err;
+    if (flags != mEnabled) {
+         err = sspEnable(LOGTAG, SSP_LIGHT, en);
+         if(err >= 0){
+              mEnabled = flags;
+              setInitialState();
+
+              return 0;
+         }
+         return -1;
+    }
+    return 0;
+}
+
+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_REL) {
+             if (event->code == EVENT_TYPE_LIGHT) {
+                    mPendingEvent.light = event->value;
+            }
+        } else if (type == EV_SYN) {
+            mPendingEvent.timestamp = timevalToNano(event->time);
+            if (mEnabled) {
+                *data++ = mPendingEvent;
+                count--;
+                numEventReceived++;
+            }
+        } else {
+            ALOGE("%s: unknown event (type=%d, code=%d)", LOGTAG,
+                    type, event->code);
+        }
+        mInputReader.next();
+    }
+
+    return numEventReceived;
+}
diff --git a/libsensors/LightSensor.h b/libsensors/LightSensor.h
new file mode 100644
index 0000000..85e65d9
--- /dev/null
+++ b/libsensors/LightSensor.h
@@ -0,0 +1,55 @@
+/*
+ * 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 "sensors.h"
+#include "SensorBase.h"
+#include "InputEventReader.h"
+
+/*****************************************************************************/
+
+struct input_event;
+
+class LightSensor : public SensorBase {
+    int mEnabled;
+    InputEventCircularReader mInputReader;
+    sensors_event_t mPendingEvent;
+    bool mHasPendingEvent;
+    char input_sysfs_path[PATH_MAX];
+    int input_sysfs_path_len;
+
+    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 setDelay(int32_t handle, int64_t ns);
+    virtual int enable(int32_t handle, int enabled);
+};
+
+/*****************************************************************************/
+
+#endif  // ANDROID_LIGHT_SENSOR_H
diff --git a/libsensors/MODULE_LICENSE_APACHE2 b/libsensors/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libsensors/MODULE_LICENSE_APACHE2
diff --git a/libsensors/PressureSensor.cpp b/libsensors/PressureSensor.cpp
new file mode 100644
index 0000000..0ce514f
--- /dev/null
+++ b/libsensors/PressureSensor.cpp
@@ -0,0 +1,152 @@
+/*
+ * 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 "PressureSensor.h"
+
+#define LOGTAG "PressureSensor"
+
+/*
+ * The BMP driver gives pascal values.
+ * It needs to be changed into hectoPascal
+ */
+#define PRESSURE_HECTO (1.0f/100.0f)
+
+/*****************************************************************************/
+
+PressureSensor::PressureSensor()
+    : SensorBase(NULL, "pressure_sensor"),
+      mEnabled(0),
+      mInputReader(4),
+      mHasPendingEvent(false)
+{
+    mPendingEvent.version = sizeof(sensors_event_t);
+    mPendingEvent.sensor = ID_PR;
+    mPendingEvent.type = SENSOR_TYPE_PRESSURE;
+    memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));
+
+    if (data_fd) {
+        strcpy(input_sysfs_path, "/sys/class/input/");
+        strcat(input_sysfs_path, input_name);
+        strcat(input_sysfs_path, "/device/");
+        input_sysfs_path_len = strlen(input_sysfs_path);
+        enable(0, 1);
+    }
+}
+
+PressureSensor::~PressureSensor() {
+    if (mEnabled) {
+        enable(0, 0);
+    }
+}
+
+int PressureSensor::setInitialState() {
+    struct input_absinfo absinfo;
+    if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_PRESSURE), &absinfo)) {
+        // make sure to report an event immediately
+        mHasPendingEvent = true;
+        mPendingEvent.pressure = absinfo.value * PRESSURE_HECTO;
+    }
+    return 0;
+}
+
+int PressureSensor::enable(int32_t handle, int en) {
+    int flags = en ? 1 : 0;
+    int err;
+    if (flags != mEnabled) {
+         err = sspEnable(LOGTAG, SSP_PRESS, en);
+         if(err >= 0){
+             mEnabled = flags;
+             setInitialState();
+
+             return 0;
+         }
+         return -1;
+    }
+    return 0;
+}
+
+bool PressureSensor::hasPendingEvents() const {
+    return mHasPendingEvent;
+}
+
+int PressureSensor::setDelay(int32_t handle, int64_t ns)
+{
+    int fd;
+
+    strcpy(&input_sysfs_path[input_sysfs_path_len], "pressure_poll_delay");
+    fd = open(input_sysfs_path, O_RDWR);
+    if (fd >= 0) {
+        char buf[80];
+        sprintf(buf, "%lld", ns);
+        write(fd, buf, strlen(buf)+1);
+        close(fd);
+        return 0;
+    }
+    return -1;
+}
+
+
+int PressureSensor::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_REL) {
+            if (event->code == EVENT_TYPE_PRESSURE) {
+                mPendingEvent.pressure = event->value * PRESSURE_HECTO;
+            }
+        } else if (type == EV_SYN) {
+            mPendingEvent.timestamp = timevalToNano(event->time);
+            if (mEnabled) {
+                *data++ = mPendingEvent;
+                count--;
+                numEventReceived++;
+            }
+        } else {
+            ALOGE("%s: unknown event (type=%d, code=%d)", LOGTAG,
+                    type, event->code);
+        }
+        mInputReader.next();
+    }
+
+    return numEventReceived;
+}
diff --git a/libsensors/PressureSensor.h b/libsensors/PressureSensor.h
new file mode 100644
index 0000000..9333d44
--- /dev/null
+++ b/libsensors/PressureSensor.h
@@ -0,0 +1,54 @@
+/*
+ * 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_PRESSURE_SENSOR_H
+#define ANDROID_PRESSURE_SENSOR_H
+
+#include <stdint.h>
+#include <errno.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include "sensors.h"
+#include "SensorBase.h"
+#include "InputEventReader.h"
+
+/*****************************************************************************/
+
+struct input_event;
+
+class PressureSensor : public SensorBase {
+    int mEnabled;
+    InputEventCircularReader mInputReader;
+    sensors_event_t mPendingEvent;
+    bool mHasPendingEvent;
+    char input_sysfs_path[PATH_MAX];
+    int input_sysfs_path_len;
+
+    int setInitialState();
+
+public:
+            PressureSensor();
+    virtual ~PressureSensor();
+    virtual int readEvents(sensors_event_t* data, int count);
+    virtual bool hasPendingEvents() const;
+    virtual int enable(int32_t handle, int enabled);
+    virtual int setDelay(int32_t handle, int64_t ns);
+};
+
+/*****************************************************************************/
+
+#endif  // ANDROID_PRESSURE_SENSOR_H
diff --git a/libsensors/ProximitySensor.cpp b/libsensors/ProximitySensor.cpp
new file mode 100644
index 0000000..f9579fa
--- /dev/null
+++ b/libsensors/ProximitySensor.cpp
@@ -0,0 +1,158 @@
+/*
+ * 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 <stdio.h>
+
+#include <cutils/log.h>
+
+#include "ProximitySensor.h"
+#include "SensorBase.h"
+
+#define LOGTAG "ProximitySensor"
+
+/*****************************************************************************/
+
+ProximitySensor::ProximitySensor()
+    : SensorBase(NULL, "proximity_sensor"),
+      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));
+
+    if (data_fd) {
+        strcpy(input_sysfs_path, "/sys/class/input/");
+        strcat(input_sysfs_path, input_name);
+        strcat(input_sysfs_path, "/device/");
+        input_sysfs_path_len = strlen(input_sysfs_path);
+        enable(0, 1);
+    }
+}
+
+ProximitySensor::~ProximitySensor() {
+    if (mEnabled) {
+        enable(0, 0);
+    }
+}
+
+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::setDelay(int32_t handle, int64_t ns)
+{
+    int fd;
+
+    strcpy(&input_sysfs_path[input_sysfs_path_len], "prox_poll_delay");
+    fd = open(input_sysfs_path, O_RDWR);
+    if (fd >= 0) {
+        char buf[80];
+        sprintf(buf, "%lld", ns);
+        write(fd, buf, strlen(buf)+1);
+        close(fd);
+        return 0;
+    }
+    return -1;
+}
+
+int ProximitySensor::enable(int32_t handle, int en) {
+
+    int flags = en ? 1 : 0;
+    int err;
+    //ALOGD("%s: Enable: %i", __func__, en);
+    if (flags != mEnabled) {
+         err = sspEnable(LOGTAG, SSP_PROX, en);
+         if(err >= 0){
+             mEnabled = flags;
+             setInitialState();
+
+             return 0;
+         }
+         return -1;
+    }
+    return 0;
+}
+
+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) {
+                if (event->value != -1) {
+                    // FIXME: not sure why we're getting -1 sometimes
+                    mPendingEvent.distance = indexToValue(event->value);
+                }
+            }
+        } else if (type == EV_SYN) {
+            mPendingEvent.timestamp = timevalToNano(event->time);
+            if (mEnabled) {
+                *data++ = mPendingEvent;
+                count--;
+                numEventReceived++;
+            }
+        } else {
+            ALOGE("%s: unknown event (type=%d, code=%d)",LOGTAG,
+                    type, event->code);
+        }
+        mInputReader.next();
+    }
+
+    return numEventReceived;
+}
+
+float ProximitySensor::indexToValue(size_t index) const
+{
+    ALOGV("%s: Index = %zu",LOGTAG, index);
+    return index * PROXIMITY_THRESHOLD_CM;
+}
diff --git a/libsensors/ProximitySensor.h b/libsensors/ProximitySensor.h
new file mode 100644
index 0000000..a6aa851
--- /dev/null
+++ b/libsensors/ProximitySensor.h
@@ -0,0 +1,55 @@
+/*
+ * 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 "sensors.h"
+#include "SensorBase.h"
+#include "InputEventReader.h"
+
+/*****************************************************************************/
+
+struct input_event;
+
+class ProximitySensor : public SensorBase {
+    int mEnabled;
+    InputEventCircularReader mInputReader;
+    sensors_event_t mPendingEvent;
+    bool mHasPendingEvent;
+    char input_sysfs_path[PATH_MAX];
+    int input_sysfs_path_len;
+
+    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);
+    virtual int setDelay(int32_t handle, int64_t ns);
+};
+
+/*****************************************************************************/
+
+#endif  // ANDROID_PROXIMITY_SENSOR_H
diff --git a/libsensors/SensorBase.cpp b/libsensors/SensorBase.cpp
new file mode 100644
index 0000000..9c27184
--- /dev/null
+++ b/libsensors/SensorBase.cpp
@@ -0,0 +1,192 @@
+/*
+ * 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)
+{
+    if (data_name) {
+        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);
+        ALOGE_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 {
+    if (!data_name) {
+        return dev_fd;
+    }
+    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)) {
+                strcpy(input_name, filename);
+                break;
+            } else {
+                close(fd);
+                fd = -1;
+            }
+        }
+    }
+    closedir(dir);
+    ALOGE_IF(fd<0, "couldn't find '%s' input device", inputName);
+
+    return fd;
+}
+
+int SensorBase::batch(int handle, int flags, int64_t period_ns, int64_t timeout)
+{
+    return 0;
+}
+
+int SensorBase::flush(int handle)
+{
+    return 0;
+}
+
+int SensorBase::sspEnable(const char* sensorname, int sensorvalue, int en)
+{
+    FILE* sspfile;
+    int oldvalue = 0;
+    int reset = 0;
+    int newvalue;
+    int fd;
+
+    sspfile = fopen(SSP_DEVICE_ENABLE, "r+");
+    fscanf(sspfile, "%d", &oldvalue);
+    fclose(sspfile);
+
+//Accel sensor is first on and last off, if we are disabling it
+// assume the screen is off, disable all sensors and zero everything out
+// to keep enable file in sync.
+    if(sensorvalue == SSP_ACCEL && !en) {
+        //ALOGD("SensorBase: Resetting sensors");
+        for(int i; i < 6; i++){
+	  newvalue = oldvalue - ssp_sensors[i];
+	  //ALOGD("SensorBase: newvalue: %i ",newvalue);
+	  sspWrite(newvalue);
+	}
+        sspWrite('\0');
+	return 0;
+    } else if(en) {
+        newvalue = oldvalue + sensorvalue;
+    } else {
+        newvalue = oldvalue - sensorvalue;
+    }
+    //ALOGI("%s: name: %s sensor: %i old value: %i  new value: %i ", __func__, sensorname, sensorvalue, oldvalue, newvalue);
+    sspWrite(newvalue);
+    return 0;
+}
+
+int SensorBase::sspWrite(int sensorvalue)
+{
+    char buf[12];
+    int fd, ret, err;
+
+    sprintf(buf, "%d", sensorvalue);
+    fd = open(SSP_DEVICE_ENABLE, O_RDWR);
+    if (fd >= 0) {
+        err = write(fd, buf, sizeof(buf));
+	ret = 0;
+    } else {
+        ALOGI("%s: error writing to file", __func__);
+	ret = -1;
+    }
+    
+    close(fd);
+    return ret;
+}
diff --git a/libsensors/SensorBase.h b/libsensors/SensorBase.h
new file mode 100644
index 0000000..aeac510
--- /dev/null
+++ b/libsensors/SensorBase.h
@@ -0,0 +1,72 @@
+/*
+ * 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>
+
+#include "sensors.h"
+
+
+/*****************************************************************************/
+
+struct sensors_event_t;
+
+class SensorBase {
+protected:
+    const char* dev_name;
+    const char* data_name;
+    char        input_name[PATH_MAX];
+    int         dev_fd;
+    int         data_fd;
+
+    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;
+    int sspEnable(const char* sensorname, int sensorvalue, int en);
+    int sspWrite(int sensorvalue);
+    virtual int batch(int handle, int flags, int64_t period_ns, int64_t timeout);
+    virtual int flush(int handle);
+
+};
+
+/*****************************************************************************/
+
+#endif  // ANDROID_SENSOR_BASE_H
diff --git a/libsensors/sensors.cpp b/libsensors/sensors.cpp
new file mode 100644
index 0000000..689c717
--- /dev/null
+++ b/libsensors/sensors.cpp
@@ -0,0 +1,392 @@
+/*
+ * 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.
+ */
+
+#define ALOG_TAG "Sensors"
+
+#include <hardware/sensors.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <dirent.h>
+#include <math.h>
+#include <poll.h>
+#include <pthread.h>
+#include <stdlib.h>
+
+#include <linux/input.h>
+
+#include <utils/Atomic.h>
+#include <utils/Log.h>
+
+#include "sensors.h"
+
+#include "LightSensor.h"
+#include "ProximitySensor.h"
+#include "AkmSensor.h"
+#include "GyroSensor.h"
+#include "AccelSensor.h"
+#include "PressureSensor.h"
+
+/*****************************************************************************/
+
+#define DELAY_OUT_TIME 0x7FFFFFFF
+
+#define LIGHT_SENSOR_POLLTIME    2000000000
+
+
+#define SENSORS_ACCELERATION     (1<<ID_A)
+#define SENSORS_MAGNETIC_FIELD   (1<<ID_M)
+#define SENSORS_ORIENTATION      (1<<ID_O)
+#define SENSORS_LIGHT            (1<<ID_L)
+#define SENSORS_PROXIMITY        (1<<ID_P)
+#define SENSORS_GYROSCOPE        (1<<ID_GY)
+#define SENSORY_PRESSURE         (1<<ID_PR)
+
+#define SENSORS_ACCELERATION_HANDLE     0
+#define SENSORS_MAGNETIC_FIELD_HANDLE   1
+#define SENSORS_ORIENTATION_HANDLE      2
+#define SENSORS_LIGHT_HANDLE            3
+#define SENSORS_PROXIMITY_HANDLE        4
+#define SENSORS_GYROSCOPE_HANDLE        5
+#define SENSORS_PRESSURE_HANDLE         6
+
+#define AKM_FTRACE 0
+#define AKM_DEBUG 0
+#define AKM_DATA 0
+
+/*****************************************************************************/
+
+/* The SENSORS Module */
+static const struct sensor_t sSensorList[] = {
+        { "LSM330DLC Acceleration Sensor",
+          "STMicroelectronics",
+          1, SENSORS_ACCELERATION_HANDLE,
+          SENSOR_TYPE_ACCELEROMETER, RANGE_A, CONVERT_A, 0.23f, 20000, 0, 0, { } },
+        { "AK8963C Magnetic field Sensor",
+          "Asahi Kasei Microdevices",
+          1, SENSORS_MAGNETIC_FIELD_HANDLE,
+          SENSOR_TYPE_MAGNETIC_FIELD, 2000.0f, CONVERT_M, 6.8f, 16667, 0, 0, { } },
+        { "AK8963C Orientation Sensor",
+          "Asahi Kasei Microdevices",
+          1, SENSORS_ORIENTATION_HANDLE,
+          SENSOR_TYPE_ORIENTATION, 360.0f, CONVERT_O, 7.8f, 16667, 0, 0, { } },
+        { "LSM330DLC Gyroscope Sensor",
+          "STMicroelectronics",
+          1, SENSORS_GYROSCOPE_HANDLE,
+          SENSOR_TYPE_GYROSCOPE, RANGE_GYRO, CONVERT_GYRO, 6.1f, 1190, 0, 0, { } },
+        { "BMP182 Pressure sensor",
+          "Bosch",
+          1, SENSORS_PRESSURE_HANDLE,
+          SENSOR_TYPE_PRESSURE, 1100.0f, 0.01f, 0.06f, 50000, 0, 0, { } },
+        { "CM36651 Proximity Sensor",
+          "Capella Microsystems",
+          1, SENSORS_PROXIMITY_HANDLE,
+          SENSOR_TYPE_PROXIMITY, 5.0f, 5.0f, 0.75f, 0, 0, 0, { } },
+        { "CM36651 Light Sensor",
+          "Capella Microsystems",
+          1, SENSORS_LIGHT_HANDLE,
+          SENSOR_TYPE_LIGHT, 10240.0f, 1.0f, 0.75f, 0, 0, 0, { } },
+};
+
+
+static int open_sensors(const struct hw_module_t* module, const char* id,
+                        struct hw_device_t** device);
+
+
+static int sensors__get_sensors_list(struct sensors_module_t* module,
+                                     struct sensor_t const** list)
+{
+        *list = sSensorList;
+        return ARRAY_SIZE(sSensorList);
+}
+
+static struct hw_module_methods_t sensors_module_methods = {
+        open: open_sensors
+};
+
+struct sensors_module_t HAL_MODULE_INFO_SYM = {
+        common: {
+                tag: HARDWARE_MODULE_TAG,
+                version_major: 1,
+                version_minor: 0,
+                id: SENSORS_HARDWARE_MODULE_ID,
+                name: "Samsung Sensor module",
+                author: "Samsung Electronic Company",
+                methods: &sensors_module_methods,
+        },
+        get_sensors_list: sensors__get_sensors_list,
+};
+
+struct sensors_poll_context_t {
+    sensors_poll_device_1_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);
+    int batch(int handle, int flags, int64_t period_ns, int64_t timeout);
+
+    // return true if the constructor is completed
+    bool isValid() { return mInitialized; };
+    int flush(int handle);
+
+private:
+    enum {
+        light           = 0,
+        proximity       = 1,
+        akm             = 2,
+        gyro            = 3,
+        accel           = 4,
+        pressure        = 5,
+        numSensorDrivers,
+        numFds,
+    };
+
+    static const size_t wake = numFds - 1;
+    static const char WAKE_MESSAGE = 'W';
+    struct pollfd mPollFds[numFds];
+    int mWritePipeFd;
+    SensorBase* mSensors[numSensorDrivers];
+    // return true if the constructor is completed
+    bool mInitialized;
+
+    int handleToDriver(int handle) const {
+      switch (handle) {
+            case ID_A:
+                return accel;
+            case ID_M:
+            case ID_O:
+                return akm;
+            case ID_P:
+                return proximity;
+            case ID_L:
+                return light;
+            case ID_GY:
+                return gyro;
+            case ID_PR:
+                return pressure;
+        }
+        return -EINVAL;
+    }
+};
+
+/*****************************************************************************/
+
+sensors_poll_context_t::sensors_poll_context_t()
+{
+    mSensors[light] = new LightSensor();
+    mPollFds[light].fd = mSensors[light]->getFd();
+    mPollFds[light].events = POLLIN;
+    mPollFds[light].revents = 0;
+
+    mSensors[proximity] = new ProximitySensor();
+    mPollFds[proximity].fd = mSensors[proximity]->getFd();
+    mPollFds[proximity].events = POLLIN;
+    mPollFds[proximity].revents = 0;
+
+    mSensors[akm] = new AkmSensor();
+    mPollFds[akm].fd = mSensors[akm]->getFd();
+    mPollFds[akm].events = POLLIN;
+    mPollFds[akm].revents = 0;
+
+    mSensors[gyro] = new GyroSensor();
+    mPollFds[gyro].fd = mSensors[gyro]->getFd();
+    mPollFds[gyro].events = POLLIN;
+    mPollFds[gyro].revents = 0;
+
+    mSensors[accel] = new AccelSensor();
+    mPollFds[accel].fd = mSensors[accel]->getFd();
+    mPollFds[accel].events = POLLIN;
+    mPollFds[accel].revents = 0;
+
+    mSensors[pressure] = new PressureSensor();
+    mPollFds[pressure].fd = mSensors[pressure]->getFd();
+    mPollFds[pressure].events = POLLIN;
+    mPollFds[pressure].revents = 0;
+
+    int wakeFds[2];
+    int result = pipe(wakeFds);
+    ALOGE_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;
+    mInitialized = true;
+}
+
+sensors_poll_context_t::~sensors_poll_context_t() {
+    for (int i=0 ; i<numSensorDrivers ; i++) {
+        delete mSensors[i];
+    }
+    close(mPollFds[wake].fd);
+    close(mWritePipeFd);
+    mInitialized = false;
+}
+
+int sensors_poll_context_t::activate(int handle, int enabled) {
+    if (!mInitialized) return -EINVAL;
+    int index = handleToDriver(handle);
+    //ALOGI("Sensors: handle: %i", 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);
+        ALOGE_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) {
+                ALOGE("poll() failed (%s)", strerror(errno));
+                return -errno;
+            }
+            if (mPollFds[wake].revents & POLLIN) {
+                char msg;
+                int result = read(mPollFds[wake].fd, &msg, 1);
+                ALOGE_IF(result<0, "error reading from wake pipe (%s)", strerror(errno));
+                ALOGE_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;
+}
+
+int sensors_poll_context_t::batch(int handle, int flags, int64_t period_ns, int64_t timeout)
+{
+    int index = handleToDriver(handle);
+    if (index < 0) return index;
+    return mSensors[index]->batch(handle, flags, period_ns, timeout);
+}
+
+int sensors_poll_context_t::flush(int handle)
+{
+    int index = handleToDriver(handle);
+    if (index < 0) return index;
+    return mSensors[index]->flush(handle);
+}
+
+/*****************************************************************************/
+
+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);
+}
+
+static int poll__batch(struct sensors_poll_device_1 *dev,
+                      int handle, int flags, int64_t period_ns, int64_t timeout)
+{
+    sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
+    return ctx->batch(handle, flags, period_ns, timeout);
+}
+
+static int poll__flush(struct sensors_poll_device_1 *dev,
+                      int handle)
+{
+    sensors_poll_context_t *ctx = (sensors_poll_context_t *)dev;
+    return ctx->flush(handle);
+}
+
+/*****************************************************************************/
+
+/** Open a new instance of a sensor device using name */
+static int open_sensors(const struct hw_module_t* module, const char* id,
+                        struct hw_device_t** device)
+{
+        int status = -EINVAL;
+        sensors_poll_context_t *dev = new sensors_poll_context_t();
+
+        memset(&dev->device, 0, sizeof(sensors_poll_device_1));
+
+        dev->device.common.tag = HARDWARE_DEVICE_TAG;
+        dev->device.common.version  = SENSORS_DEVICE_API_VERSION_1_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;
+
+        /* Batch processing */
+        dev->device.batch           = poll__batch;
+        dev->device.flush           = poll__flush;
+
+        *device = &dev->device.common;
+        status = 0;
+
+        return status;
+}
+
diff --git a/libsensors/sensors.h b/libsensors/sensors.h
new file mode 100644
index 0000000..5ad1b80
--- /dev/null
+++ b/libsensors/sensors.h
@@ -0,0 +1,134 @@
+/*
+ * 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
+
+/*****************************************************************************/
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
+#define ID_A  (0)
+#define ID_M  (1)
+#define ID_O  (2)
+#define ID_L  (3)
+#define ID_P  (4)
+#define ID_GY (5)
+#define ID_PR (6)
+
+#define SSP_ACCEL  (1)
+#define SSP_GYRO   (2)
+#define SSP_MAG    (4)
+#define SSP_PRESS  (8)
+#define SSP_PROX   (32)
+#define SSP_LIGHT  (64)
+
+#define SSP_DEVICE_ENABLE   "/sys/class/sensors/ssp_sensor/enable"
+
+const int ssp_sensors[] = {
+  SSP_ACCEL,
+  SSP_GYRO,
+  SSP_MAG,
+  SSP_PRESS,
+  SSP_PROX,
+  SSP_LIGHT
+};
+
+
+/*****************************************************************************/
+
+/*
+ * The SENSORS Module
+ */
+
+/* the CM3663 is a binary proximity sensor that triggers around 6 cm on
+ * this hardware */
+#define PROXIMITY_THRESHOLD_CM  8.0f
+
+/*****************************************************************************/
+
+#define EVENT_TYPE_ACCEL_X          REL_X  //1
+#define EVENT_TYPE_ACCEL_Y          REL_Y  //0
+#define EVENT_TYPE_ACCEL_Z          REL_Z  //2
+
+#define EVENT_TYPE_YAW              ABS_RX  //3
+#define EVENT_TYPE_PITCH            ABS_RY  //4
+#define EVENT_TYPE_ROLL             ABS_RZ  //5
+#define EVENT_TYPE_ORIENT_STATUS    ABS_WHEEL //8
+
+#define EVENT_TYPE_MAGV_X           ABS_RX  // 3
+#define EVENT_TYPE_MAGV_Y           ABS_RY  // 4
+#define EVENT_TYPE_MAGV_Z           ABS_RZ  // 5
+
+#define EVENT_TYPE_TEMPERATURE      ABS_THROTTLE
+#define EVENT_TYPE_STEP_COUNT       ABS_GAS
+#define EVENT_TYPE_PROXIMITY        ABS_DISTANCE
+#define EVENT_TYPE_LIGHT            REL_MISC
+
+#define EVENT_TYPE_GYRO_X           REL_RX
+#define EVENT_TYPE_GYRO_Y           REL_RY
+#define EVENT_TYPE_GYRO_Z           REL_RZ
+
+#define EVENT_TYPE_PRESSURE         REL_HWHEEL
+
+#define LSG                         (1000.0f)
+
+// conversion of acceleration data to SI units (m/s^2)
+#define RANGE_A                     (2*GRAVITY_EARTH)
+#define RESOLUTION_A                (GRAVITY_EARTH / LSG)
+#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)
+
+/* conversion of orientation data to degree units */
+#define CONVERT_O                   (1.0f/1000.0f)
+#define CONVERT_O_A                 (CONVERT_O)
+#define CONVERT_O_P                 (CONVERT_O)
+#define CONVERT_O_R                 (CONVERT_O)
+
+// conversion of gyro data to SI units (radian/sec)
+#define RANGE_GYRO                  (2000.0f*(float)M_PI/180.0f)
+#define CONVERT_GYRO                ((70.0f / 4000.0f) * ((float)M_PI / 180.0f))
+#define CONVERT_GYRO_X              (CONVERT_GYRO)
+#define CONVERT_GYRO_Y              (CONVERT_GYRO)
+#define CONVERT_GYRO_Z              (CONVERT_GYRO)
+
+#define SENSOR_STATE_MASK           (0x7FFF)
+
+/*****************************************************************************/
+
+__END_DECLS
+
+#endif  // ANDROID_SENSORS_H