From 0920eb6428b5779e89b3f66b049ddbb5f9c9215d Mon Sep 17 00:00:00 2001
From: RGIB <gibellini.roberto@gmail.com>
Date: Sun, 20 Nov 2016 14:26:52 +0100
Subject: i9305 : build the correct sensors driver

from stock sensors.smdk4412.so :

LSM330DLC 3-axis Accelerometer
AK8975C 3-axis Magnetic field sensor
AK8975C Magnetic field Sensor UnCalibrated
CM36651 Light sensor
CM36651 Proximity sensor
LSM330DLC Gyroscope sensor
LPS331AP Pressure Sensor

Change-Id: I24cdb73bbf91ccbf03be78e159df21cc780bc1e5
---
 libsensors/sensors.cpp | 395 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 395 insertions(+)
 create mode 100644 libsensors/sensors.cpp

(limited to 'libsensors/sensors.cpp')

diff --git a/libsensors/sensors.cpp b/libsensors/sensors.cpp
new file mode 100644
index 0000000..74b7f21
--- /dev/null
+++ b/libsensors/sensors.cpp
@@ -0,0 +1,395 @@
+/*
+ * 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 <cstring>
+
+#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, 0.0096f, 0.23f, 10000, 0, 0,
+          SENSOR_STRING_TYPE_ACCELEROMETER, "", 0, SENSOR_FLAG_CONTINUOUS_MODE, { } },
+        { "AK8975C Magnetic field Sensor",
+          "Asahi Kasei Microdevices",
+          1, SENSORS_MAGNETIC_FIELD_HANDLE,
+          SENSOR_TYPE_MAGNETIC_FIELD, 2000.0f, CONVERT_M, 6.8f, 10000, 0, 0,
+          SENSOR_STRING_TYPE_MAGNETIC_FIELD, "", 0, SENSOR_FLAG_CONTINUOUS_MODE, { } },
+        { "LSM330DLC Gyroscope Sensor",
+          "STMicroelectronics",
+          1, SENSORS_GYROSCOPE_HANDLE,
+          SENSOR_TYPE_GYROSCOPE, RANGE_GYRO, CONVERT_GYRO, 6.1f, 5000, 0, 0,
+          SENSOR_STRING_TYPE_GYROSCOPE, "", 0, SENSOR_FLAG_CONTINUOUS_MODE, { } },
+        { "LPS331AP Pressure sensor",
+          "STMicroelectronics",
+          1, SENSORS_PRESSURE_HANDLE,
+          SENSOR_TYPE_PRESSURE, 1260.0f, 1.0f / 4096, 0.045f, 40000, 0, 0,
+          SENSOR_STRING_TYPE_PRESSURE, "", 20000, SENSOR_FLAG_CONTINUOUS_MODE, { } },
+        { "CM36651 Proximity Sensor",
+          "Capella Microsystems",
+          1, SENSORS_PROXIMITY_HANDLE,
+          SENSOR_TYPE_PROXIMITY, 6.0f, 6.0f, 1.3f, 0, 0, 0,
+          SENSOR_STRING_TYPE_PROXIMITY, "", 0, SENSOR_FLAG_WAKE_UP | SENSOR_FLAG_ON_CHANGE_MODE, { } },
+        { "CM36651 Light Sensor",
+          "Capella Microsystems",
+          1, SENSORS_LIGHT_HANDLE,
+          SENSOR_TYPE_LIGHT, 121240.0f, 1.0f, 0.2f, 0, 0, 0,
+          SENSOR_STRING_TYPE_LIGHT, "", 0, SENSOR_FLAG_ON_CHANGE_MODE, { } },
+};
+
+
+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;
+}
+
-- 
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