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310 lines
10 KiB
310 lines
10 KiB
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <fcntl.h>
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#include <errno.h>
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#include <math.h>
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#include <poll.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <sys/select.h>
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#include <dlfcn.h>
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#include "ak8973b.h"
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#include <cutils/log.h>
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#include "AkmSensor.h"
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//#define LOG_NDEBUG 0
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/*****************************************************************************/
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int (*akm_is_sensor_enabled)(uint32_t sensor_type);
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int (*akm_enable_sensor)(uint32_t sensor_type);
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int (*akm_disable_sensor)(uint32_t sensor_type);
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int (*akm_set_delay)(uint32_t sensor_type, uint64_t delay);
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int stub_is_sensor_enabled(uint32_t sensor_type) {
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return 0;
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}
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int stub_enable_disable_sensor(uint32_t sensor_type) {
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return -ENODEV;
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}
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int stub_set_delay(uint32_t sensor_type, uint64_t delay) {
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return -ENODEV;
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}
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AkmSensor::AkmSensor()
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: SensorBase(NULL, NULL),
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mEnabled(0),
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mPendingMask(0),
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mInputReader(32)
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{
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/* Open the library before opening the input device. The library
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* creates a uinput device.
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*/
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if (loadAKMLibrary() == 0) {
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data_name = "compass_sensor";
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data_fd = openInput("compass_sensor");
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}
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memset(mPendingEvents, 0, sizeof(mPendingEvents));
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mPendingEvents[Accelerometer].version = sizeof(sensors_event_t);
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mPendingEvents[Accelerometer].sensor = ID_A;
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mPendingEvents[Accelerometer].type = SENSOR_TYPE_ACCELEROMETER;
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mPendingEvents[Accelerometer].acceleration.status = SENSOR_STATUS_ACCURACY_HIGH;
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mPendingEvents[MagneticField].version = sizeof(sensors_event_t);
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mPendingEvents[MagneticField].sensor = ID_M;
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mPendingEvents[MagneticField].type = SENSOR_TYPE_MAGNETIC_FIELD;
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mPendingEvents[MagneticField].magnetic.status = SENSOR_STATUS_ACCURACY_HIGH;
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mPendingEvents[Orientation ].version = sizeof(sensors_event_t);
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mPendingEvents[Orientation ].sensor = ID_O;
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mPendingEvents[Orientation ].type = SENSOR_TYPE_ORIENTATION;
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mPendingEvents[Orientation ].orientation.status = SENSOR_STATUS_ACCURACY_HIGH;
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// read the actual value of all sensors if they're enabled already
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struct input_absinfo absinfo;
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short flags = 0;
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if (akm_is_sensor_enabled(SENSOR_TYPE_ACCELEROMETER)) {
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mEnabled |= 1<<Accelerometer;
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ACCEL_X), &absinfo)) {
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mPendingEvents[Accelerometer].acceleration.x = absinfo.value * CONVERT_A_X;
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}
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ACCEL_Y), &absinfo)) {
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mPendingEvents[Accelerometer].acceleration.y = absinfo.value * CONVERT_A_Y;
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}
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ACCEL_Z), &absinfo)) {
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mPendingEvents[Accelerometer].acceleration.z = absinfo.value * CONVERT_A_Z;
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}
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}
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if (akm_is_sensor_enabled(SENSOR_TYPE_MAGNETIC_FIELD)) {
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mEnabled |= 1<<MagneticField;
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_MAGV_X), &absinfo)) {
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mPendingEvents[MagneticField].magnetic.x = absinfo.value * CONVERT_M_X;
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}
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_MAGV_Y), &absinfo)) {
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mPendingEvents[MagneticField].magnetic.y = absinfo.value * CONVERT_M_Y;
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}
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_MAGV_Z), &absinfo)) {
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mPendingEvents[MagneticField].magnetic.z = absinfo.value * CONVERT_M_Z;
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}
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}
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if (akm_is_sensor_enabled(SENSOR_TYPE_ORIENTATION)) {
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mEnabled |= 1<<Orientation;
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_YAW), &absinfo)) {
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mPendingEvents[Orientation].orientation.azimuth = absinfo.value;
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}
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_PITCH), &absinfo)) {
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mPendingEvents[Orientation].orientation.pitch = absinfo.value;
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}
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ROLL), &absinfo)) {
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mPendingEvents[Orientation].orientation.roll = -absinfo.value;
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}
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if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ORIENT_STATUS), &absinfo)) {
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mPendingEvents[Orientation].orientation.status = uint8_t(absinfo.value & SENSOR_STATE_MASK);
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}
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}
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// disable temperature sensor, since it is not supported
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akm_disable_sensor(SENSOR_TYPE_TEMPERATURE);
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}
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AkmSensor::~AkmSensor()
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{
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if (mLibAKM) {
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unsigned ref = ::dlclose(mLibAKM);
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}
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}
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int AkmSensor::enable(int32_t handle, int en)
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{
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int what = -1;
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switch (handle) {
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case ID_A: what = Accelerometer; break;
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case ID_M: what = MagneticField; break;
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case ID_O: what = Orientation; break;
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}
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if (uint32_t(what) >= numSensors)
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return -EINVAL;
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int newState = en ? 1 : 0;
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int err = 0;
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if ((uint32_t(newState)<<what) != (mEnabled & (1<<what))) {
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uint32_t sensor_type;
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switch (what) {
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case Accelerometer: sensor_type = SENSOR_TYPE_ACCELEROMETER; break;
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case MagneticField: sensor_type = SENSOR_TYPE_MAGNETIC_FIELD; break;
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case Orientation: sensor_type = SENSOR_TYPE_ORIENTATION; break;
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}
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short flags = newState;
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if (en)
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err = akm_enable_sensor(sensor_type);
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else
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err = akm_disable_sensor(sensor_type);
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LOGE_IF(err, "Could not change sensor state (%s)", strerror(-err));
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if (!err) {
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mEnabled &= ~(1<<what);
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mEnabled |= (uint32_t(flags)<<what);
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}
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}
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return err;
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}
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int AkmSensor::setDelay(int32_t handle, int64_t ns)
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{
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uint32_t sensor_type = 0;
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if (ns < 0)
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return -EINVAL;
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switch (handle) {
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case ID_A: sensor_type = SENSOR_TYPE_ACCELEROMETER; break;
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case ID_M: sensor_type = SENSOR_TYPE_MAGNETIC_FIELD; break;
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case ID_O: sensor_type = SENSOR_TYPE_ORIENTATION; break;
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}
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if (sensor_type == 0)
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return -EINVAL;
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return akm_set_delay(sensor_type, ns);
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}
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int AkmSensor::loadAKMLibrary()
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{
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mLibAKM = dlopen("libakm.so", RTLD_NOW);
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if (!mLibAKM) {
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akm_is_sensor_enabled = stub_is_sensor_enabled;
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akm_enable_sensor = stub_enable_disable_sensor;
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akm_disable_sensor = stub_enable_disable_sensor;
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akm_set_delay = stub_set_delay;
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LOGE("AkmSensor: unable to load AKM Library, %s", dlerror());
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return -ENOENT;
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}
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*(void **)&akm_is_sensor_enabled = dlsym(mLibAKM, "akm_is_sensor_enabled");
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*(void **)&akm_enable_sensor = dlsym(mLibAKM, "akm_enable_sensor");
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*(void **)&akm_disable_sensor = dlsym(mLibAKM, "akm_disable_sensor");
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*(void **)&akm_set_delay = dlsym(mLibAKM, "akm_set_delay");
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return 0;
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}
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int AkmSensor::readEvents(sensors_event_t* data, int count)
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{
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if (count < 1)
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return -EINVAL;
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ssize_t n = mInputReader.fill(data_fd);
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if (n < 0)
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return n;
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int numEventReceived = 0;
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input_event const* event;
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while (count && mInputReader.readEvent(&event)) {
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int type = event->type;
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if (type == EV_REL) {
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processEvent(event->code, event->value);
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mInputReader.next();
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} else if (type == EV_SYN) {
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int64_t time = timevalToNano(event->time);
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for (int j=0 ; count && mPendingMask && j<numSensors ; j++) {
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if (mPendingMask & (1<<j)) {
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mPendingMask &= ~(1<<j);
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mPendingEvents[j].timestamp = time;
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if (mEnabled & (1<<j)) {
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*data++ = mPendingEvents[j];
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count--;
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numEventReceived++;
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}
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}
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}
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if (!mPendingMask) {
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mInputReader.next();
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}
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} else {
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LOGE("AkmSensor: unknown event (type=%d, code=%d)",
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type, event->code);
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mInputReader.next();
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}
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}
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return numEventReceived;
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}
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void AkmSensor::processEvent(int code, int value)
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{
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switch (code) {
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case EVENT_TYPE_ACCEL_X:
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mPendingMask |= 1<<Accelerometer;
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mPendingEvents[Accelerometer].acceleration.x = value * CONVERT_A_X;
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break;
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case EVENT_TYPE_ACCEL_Y:
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mPendingMask |= 1<<Accelerometer;
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mPendingEvents[Accelerometer].acceleration.y = value * CONVERT_A_Y;
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break;
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case EVENT_TYPE_ACCEL_Z:
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mPendingMask |= 1<<Accelerometer;
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mPendingEvents[Accelerometer].acceleration.z = value * CONVERT_A_Z;
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break;
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case EVENT_TYPE_MAGV_X:
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LOGV("AkmSensor: EVENT_TYPE_MAGV_X value =%d", value);
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mPendingMask |= 1<<MagneticField;
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mPendingEvents[MagneticField].magnetic.x = value * CONVERT_M_X;
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break;
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case EVENT_TYPE_MAGV_Y:
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LOGV("AkmSensor: EVENT_TYPE_MAGV_Y value =%d", value);
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mPendingMask |= 1<<MagneticField;
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mPendingEvents[MagneticField].magnetic.y = value * CONVERT_M_Y;
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break;
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case EVENT_TYPE_MAGV_Z:
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LOGV("AkmSensor: EVENT_TYPE_MAGV_Z value =%d", value);
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mPendingMask |= 1<<MagneticField;
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mPendingEvents[MagneticField].magnetic.z = value * CONVERT_M_Z;
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break;
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case EVENT_TYPE_YAW:
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mPendingMask |= 1<<Orientation;
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mPendingEvents[Orientation].orientation.azimuth = value * CONVERT_O_A;
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break;
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case EVENT_TYPE_PITCH:
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mPendingMask |= 1<<Orientation;
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mPendingEvents[Orientation].orientation.pitch = value * CONVERT_O_P;
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break;
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case EVENT_TYPE_ROLL:
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mPendingMask |= 1<<Orientation;
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mPendingEvents[Orientation].orientation.roll = value * CONVERT_O_R;
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break;
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case EVENT_TYPE_ORIENT_STATUS:
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uint8_t status = uint8_t(value & SENSOR_STATE_MASK);
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if (status == 4)
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status = 0;
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mPendingMask |= 1<<Orientation;
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mPendingEvents[Orientation].orientation.status = status;
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break;
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}
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}
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