diff options
Diffstat (limited to 'libsensors/AkmSensor.cpp')
| -rw-r--r-- | libsensors/AkmSensor.cpp | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/libsensors/AkmSensor.cpp b/libsensors/AkmSensor.cpp new file mode 100644 index 0000000..58fa387 --- /dev/null +++ b/libsensors/AkmSensor.cpp @@ -0,0 +1,302 @@ +/* + * 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; + + mPendingEvents[Orientation ].version = sizeof(sensors_event_t); + mPendingEvents[Orientation ].sensor = ID_O; + mPendingEvents[Orientation ].type = SENSOR_TYPE_ORIENTATION; + mPendingEvents[Orientation ].orientation.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; + } + } + + if (akm_is_sensor_enabled(SENSOR_TYPE_ORIENTATION)) { + mEnabled |= 1<<Orientation; + if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_YAW), &absinfo)) { + mPendingEvents[Orientation].orientation.azimuth = absinfo.value; + } + if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_PITCH), &absinfo)) { + mPendingEvents[Orientation].orientation.pitch = absinfo.value; + } + if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ROLL), &absinfo)) { + mPendingEvents[Orientation].orientation.roll = -absinfo.value; + } + if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ORIENT_STATUS), &absinfo)) { + mPendingEvents[Orientation].orientation.status = uint8_t(absinfo.value & SENSOR_STATE_MASK); + } + } + + // disable temperature sensor, since it is not supported + akm_disable_sensor(SENSOR_TYPE_TEMPERATURE); +} + +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; + case Orientation: sensor_type = SENSOR_TYPE_ORIENTATION; 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(); + setDelay(handle, 66667000); //set an initial delay after enabling + + 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; + case ID_O: sensor_type = SENSOR_TYPE_ORIENTATION; 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; + } +} |