diff options
Diffstat (limited to 'libsensors/sensors.cpp')
-rw-r--r-- | libsensors/sensors.cpp | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/libsensors/sensors.cpp b/libsensors/sensors.cpp new file mode 100644 index 0000000..a0194ef --- /dev/null +++ b/libsensors/sensors.cpp @@ -0,0 +1,374 @@ +/* + * 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 LOG_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 "BoschYamaha.h" +#include "AccelSensor.h" +#include "CompassSensor.h" +#include "OrientationSensor.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 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 AKM_FTRACE 0 +#define AKM_DEBUG 0 +#define AKM_DATA 0 + +/*****************************************************************************/ + +/* The SENSORS Module */ +static const struct sensor_t sSensorList[] = { + + { "LIS3DH Acceleration Sensor", + "STMicroelectronics", + 1, SENSORS_ACCELERATION_HANDLE, + SENSOR_TYPE_ACCELEROMETER, RANGE_A, RESOLUTION_A, 0.20f, 10000, { } }, + { "MS-3R (YAS532) Magnetic Sensor", + "Yamaha Corporation", + 1, SENSORS_MAGNETIC_FIELD_HANDLE, + SENSOR_TYPE_MAGNETIC_FIELD, 2000.0f, 0.06f, 6.8f, 10000, { } }, + { "MS-x Orientation Sensor", + "Yamaha Corporation", + 1, SENSORS_ORIENTATION_HANDLE, + SENSOR_TYPE_ORIENTATION, 360.0f, CONVERT_O, 7.8f, 10000, { } }, + { "AL3201 Light Sensor", + "LITEON", + 1, SENSORS_LIGHT_HANDLE, + SENSOR_TYPE_LIGHT, 10240.0f, 1.0f, 0.75f, 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 { + struct sensors_poll_device_t device; // must be first + + sensors_poll_context_t(); + ~sensors_poll_context_t(); + int activate(int handle, int enabled); + int setDelay(int handle, int64_t ns); + int pollEvents(sensors_event_t* data, int count); + +private: + enum { + light = 0, + proximity = 1, + bosch = 2, + yamaha = 3, + orientation = 4, + numSensorDrivers, + numFds, + }; + + static const size_t wake = numFds - 1; + static const char WAKE_MESSAGE = 'W'; + struct pollfd mPollFds[numFds]; + int mWritePipeFd; + SensorBase* mSensors[numSensorDrivers]; + + // For keeping track of usage (only count from system) + bool mAccelActive; + bool mMagnetActive; + bool mOrientationActive; + + int real_activate(int handle, int enabled); + + int handleToDriver(int handle) const { + switch (handle) { + + case ID_A: + return bosch; + case ID_M: + return yamaha; + case ID_O: + return orientation; + case ID_P: + return proximity; + case ID_L: + return light; + + } + 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[bosch] = new AccelSensor(); + mPollFds[bosch].fd = mSensors[bosch]->getFd(); + mPollFds[bosch].events = POLLIN; + mPollFds[bosch].revents = 0; + + mSensors[yamaha] = new CompassSensor(); + mPollFds[yamaha].fd = mSensors[yamaha]->getFd(); + mPollFds[yamaha].events = POLLIN; + mPollFds[yamaha].revents = 0; + + mSensors[orientation] = new OrientationSensor(); + mPollFds[orientation].fd = mSensors[orientation]->getFd(); + mPollFds[orientation].events = POLLIN; + mPollFds[orientation].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; + + mAccelActive = false; + mMagnetActive = false; + mOrientationActive = false; +} + +sensors_poll_context_t::~sensors_poll_context_t() { + for (int i=0 ; i<numSensorDrivers ; i++) { + delete mSensors[i]; + } + close(mPollFds[wake].fd); + close(mWritePipeFd); +} + +int sensors_poll_context_t::activate(int handle, int enabled) { + int err; + + // Orientation requires accelerometer and magnetic sensor + if (handle == ID_O) { + mOrientationActive = enabled ? true : false; + if (!mAccelActive) { + err = real_activate(ID_A, enabled); + if (err) return err; + } + if (!mMagnetActive) { + err = real_activate(ID_M, enabled); + if (err) return err; + } + } + // Keep track of magnetic and accelerometer use from system + else if (handle == ID_A) { + mAccelActive = enabled ? true : false; + // No need to enable or disable if orientation sensor is active as that will handle it + if (mOrientationActive) return 0; + } + else if (handle == ID_M) { + mMagnetActive = enabled ? true : false; + // No need to enable or disable if orientation sensor is active as that will handle it + if (mOrientationActive) return 0; + } + + return real_activate(handle, enabled); +} + +int sensors_poll_context_t::real_activate(int handle, int enabled) { + int index = handleToDriver(handle); + if (index < 0) return index; + int err = mSensors[index]->enable(handle, enabled); + if (enabled && !err) { + const char wakeMessage(WAKE_MESSAGE); + int result = write(mWritePipeFd, &wakeMessage, 1); + 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 + do { + n = poll(mPollFds, numFds, nbEvents ? 0 : -1); + } while (n < 0 && errno == EINTR); + 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; +} + +/*****************************************************************************/ + +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); +} + +/*****************************************************************************/ + +/** 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_t)); + + dev->device.common.tag = HARDWARE_DEVICE_TAG; + dev->device.common.version = 0; + dev->device.common.module = const_cast<hw_module_t*>(module); + dev->device.common.close = poll__close; + dev->device.activate = poll__activate; + dev->device.setDelay = poll__setDelay; + dev->device.poll = poll__poll; + + *device = &dev->device.common; + status = 0; + + return status; +} + |