summaryrefslogtreecommitdiffstats
path: root/libsensors/sensors.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'libsensors/sensors.cpp')
-rw-r--r--libsensors/sensors.cpp395
1 files changed, 395 insertions, 0 deletions
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;
+}
+
generated by cgit v1.1 at 2024-12-22 10:38:02 +0000