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NativeSensorManager.cpp
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NativeSensorManager.cpp
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/*--------------------------------------------------------------------------
Copyright (c) 2014, The Linux Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* Neither the name of The Linux Foundation nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--------------------------------------------------------------------------*/
#include "NativeSensorManager.h"
ANDROID_SINGLETON_STATIC_INSTANCE(NativeSensorManager);
enum {
ORIENTATION = 0,
PSEUDO_GYROSCOPE,
ROTATION_VECTOR,
LINEAR_ACCELERATION,
GRAVITY,
POCKET,
VIRTUAL_SENSOR_COUNT,
};
char NativeSensorManager::virtualSensorName[VIRTUAL_SENSOR_COUNT][SYSFS_MAXLEN];
const struct sensor_t NativeSensorManager::virtualSensorList [VIRTUAL_SENSOR_COUNT] = {
[ORIENTATION] = {
.name = virtualSensorName[ORIENTATION],
.vendor = "oem",
.version = 1,
.handle = '_dmy',
.type = SENSOR_TYPE_ORIENTATION,
.maxRange = 360.0f,
.resolution = 1.0f/256.0f,
.power = 1,
.minDelay = 40000,
.fifoReservedEventCount = 0,
.fifoMaxEventCount = 0,
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
.stringType = NULL,
.requiredPermission = NULL,
.maxDelay = 0,
.flags = SENSOR_FLAG_CONTINUOUS_MODE,
#endif
.reserved = {},
},
[PSEUDO_GYROSCOPE] = {
.name = virtualSensorName[PSEUDO_GYROSCOPE],
.vendor = "oem",
.version = 1,
.handle = '_dmy',
.type = SENSOR_TYPE_GYROSCOPE,
.maxRange = 50.0f,
.resolution = 0.01f,
.power = 1,
.minDelay = 10000,
.fifoReservedEventCount = 0,
.fifoMaxEventCount = 0,
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
.stringType = NULL,
.requiredPermission = NULL,
.maxDelay = 0,
.flags = SENSOR_FLAG_CONTINUOUS_MODE,
#endif
.reserved = {},
},
[ROTATION_VECTOR] = {
.name = virtualSensorName[ROTATION_VECTOR],
.vendor = "oem",
.version = 1,
.handle = '_dmy',
.type = SENSOR_TYPE_ROTATION_VECTOR,
.maxRange = 1,
.resolution = 1.0f / (1<<24),
.power = 1,
.minDelay = 40000,
.fifoReservedEventCount = 0,
.fifoMaxEventCount = 0,
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
.stringType = NULL,
.requiredPermission = NULL,
.maxDelay = 0,
.flags = SENSOR_FLAG_CONTINUOUS_MODE,
#endif
.reserved = {},
},
[LINEAR_ACCELERATION] = {
.name = virtualSensorName[LINEAR_ACCELERATION],
.vendor = "oem",
.version = 1,
.handle = '_dmy',
.type = SENSOR_TYPE_LINEAR_ACCELERATION,
.maxRange = 40.0f,
.resolution = 0.01f,
.power = 1,
.minDelay = 10000,
.fifoReservedEventCount = 0,
.fifoMaxEventCount = 0,
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
.stringType = NULL,
.requiredPermission = NULL,
.maxDelay = 0,
.flags = SENSOR_FLAG_CONTINUOUS_MODE,
#endif
.reserved = {},
},
[GRAVITY] = {
.name = virtualSensorName[GRAVITY],
.vendor = "oem",
.version = 1,
.handle = '_dmy',
.type = SENSOR_TYPE_GRAVITY,
.maxRange = 40.0f,
.resolution = 0.01f,
.power = 1,
.minDelay = 10000,
.fifoReservedEventCount = 0,
.fifoMaxEventCount = 0,
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
.stringType = NULL,
.requiredPermission = NULL,
.maxDelay = 0,
.flags = SENSOR_FLAG_CONTINUOUS_MODE,
#endif
.reserved = {},
},
[POCKET] = {
.name = virtualSensorName[POCKET],
.vendor = "oem",
.version = 1,
.handle = '_dmy',
.type = SENSOR_TYPE_POCKET,
.maxRange = 1.0f,
.resolution = 1.0f,
.power = 1,
.minDelay = 5000,
.fifoReservedEventCount = 0,
.fifoMaxEventCount = 0,
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
.stringType = "com.oem.pocketdetector",
.requiredPermission = NULL,
.maxDelay = 0,
.flags = SENSOR_FLAG_ON_CHANGE_MODE,
#endif
.reserved = {},
},
};
int NativeSensorManager::addDependency(struct SensorContext *ctx, int handle)
{
struct SensorContext *dep;
struct listnode *node;
struct SensorRefMap *ref, *item;
if (!ctx->is_virtual) {
ALOGE("Only available for virtual sensors.\n");
return -1;
}
dep = getInfoByHandle(handle);
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
if (ctx->sensor->maxDelay == 0)
ctx->sensor->maxDelay = dep->sensor->maxDelay;
else
ctx->sensor->maxDelay = dep->sensor->maxDelay < ctx->sensor->maxDelay ?
dep->sensor->maxDelay : ctx->sensor->maxDelay;
#endif
if (dep != NULL) {
list_for_each(node, &ctx->dep_list) {
ref = node_to_item(node, struct SensorRefMap, list);
if (ref->ctx == dep) {
ALOGW("The dependency already present");
return 0;
}
}
item = new SensorRefMap;
item->ctx = dep;
list_add_tail(&ctx->dep_list, &item->list);
return 0;
}
return -1;
}
int NativeSensorManager::initVirtualSensor(struct SensorContext *ctx, int handle,
struct sensor_t info)
{
CalibrationManager& cm(CalibrationManager::getInstance());
SensorRefMap *item;
struct SensorContext *ref;
unsigned int i;
*(ctx->sensor) = info;
if (cm.getCalAlgo(ctx->sensor) == NULL) {
return -1;
}
ctx->sensor->handle = handle;
ctx->driver = new VirtualSensor(ctx);
ctx->data_fd = -1;
ctx->is_virtual = true;
memset(ctx->enable_path, 0, sizeof(ctx->enable_path));
memset(ctx->data_path, 0, sizeof(ctx->data_path));
type_map.add(ctx->sensor->type, ctx);
handle_map.add(ctx->sensor->handle, ctx);
return 0;
}
const struct SysfsMap NativeSensorManager::node_map[] = {
{offsetof(struct sensor_t, name), SYSFS_NAME, TYPE_STRING, 1},
{offsetof(struct sensor_t, vendor), SYSFS_VENDOR, TYPE_STRING, 1},
{offsetof(struct sensor_t, version), SYSFS_VERSION, TYPE_INTEGER, 1},
{offsetof(struct sensor_t, type), SYSFS_TYPE, TYPE_INTEGER, 1},
{offsetof(struct sensor_t, maxRange), SYSFS_MAXRANGE, TYPE_FLOAT, 1},
{offsetof(struct sensor_t, resolution), SYSFS_RESOLUTION, TYPE_FLOAT, 1},
{offsetof(struct sensor_t, power), SYSFS_POWER, TYPE_FLOAT, 1},
{offsetof(struct sensor_t, minDelay), SYSFS_MINDELAY, TYPE_INTEGER, 1},
{offsetof(struct sensor_t, fifoReservedEventCount), SYSFS_FIFORESVCNT, TYPE_INTEGER, 0},
{offsetof(struct sensor_t, fifoMaxEventCount), SYSFS_FIFOMAXCNT, TYPE_INTEGER, 0},
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
#if defined(__LP64__)
{offsetof(struct sensor_t, maxDelay), SYSFS_MAXDELAY, TYPE_INTEGER64, 0},
{offsetof(struct sensor_t, flags), SYSFS_FLAGS, TYPE_INTEGER64, 0},
#else
{offsetof(struct sensor_t, maxDelay), SYSFS_MAXDELAY, TYPE_INTEGER, 0},
{offsetof(struct sensor_t, flags), SYSFS_FLAGS, TYPE_INTEGER, 0},
#endif
#endif
};
NativeSensorManager::NativeSensorManager():
mSensorCount(0), mScanned(false), mEventCount(0), type_map(NULL), handle_map(NULL), fd_map(NULL)
{
int i;
memset(sensor_list, 0, sizeof(sensor_list));
memset(context, 0, sizeof(context));
type_map.setCapacity(MAX_SENSORS);
handle_map.setCapacity(MAX_SENSORS);
fd_map.setCapacity(MAX_SENSORS);
for (i = 0; i < MAX_SENSORS; i++) {
context[i].sensor = &sensor_list[i];
sensor_list[i].name = context[i].name;
sensor_list[i].vendor = context[i].vendor;
list_init(&context[i].listener);
list_init(&context[i].dep_list);
}
if(getDataInfo()) {
ALOGE("Get data info failed\n");
}
dump();
}
NativeSensorManager::~NativeSensorManager()
{
int i;
int number = getSensorCount();
struct listnode *node;
struct listnode *n;
struct SensorContext *ctx;
struct SensorRefMap *item;
for (i = 0; i < number; i++) {
if (context[i].driver != NULL) {
delete context[i].driver;
}
list_for_each_safe(node, n, &context[i].listener) {
item = node_to_item(node, struct SensorRefMap, list);
if (item != NULL) {
list_remove(&item->list);
delete item;
}
}
list_for_each_safe(node, n, &context[i].dep_list) {
item = node_to_item(node, struct SensorRefMap, list);
if (item != NULL) {
list_remove(&item->list);
delete item;
}
}
}
}
void NativeSensorManager::dump()
{
int i;
struct listnode *node;
struct SensorRefMap* ref;
for (i = 0; i < mSensorCount; i++) {
ALOGI("\nname:%s\ntype:%d\nhandle:%d\ndata_fd=%d\nis_virtual=%d",
context[i].sensor->name,
context[i].sensor->type,
context[i].sensor->handle,
context[i].data_fd,
context[i].is_virtual);
ALOGI("data_path=%s\nenable_path=%s\ndelay_ns:%lld\nenable=%d\n",
context[i].data_path,
context[i].enable_path,
context[i].delay_ns,
context[i].enable);
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
ALOGI("minDelay=%d maxDelay=%d flags=%d\n",
context[i].sensor->minDelay,
context[i].sensor->maxDelay,
context[i].sensor->flags);
#endif
ALOGI("Listener:");
list_for_each(node, &context[i].listener) {
ref = node_to_item(node, struct SensorRefMap, list);
ALOGI("name:%s handle:%d\n", ref->ctx->sensor->name, ref->ctx->sensor->handle);
}
ALOGI("Dependency:");
list_for_each(node, &context[i].dep_list) {
ref = node_to_item(node, struct SensorRefMap, list);
ALOGI("name:%s handle:%d", ref->ctx->sensor->name, ref->ctx->sensor->handle);
}
}
ALOGI("\n");
}
void NativeSensorManager::compositeVirtualSensorName(const char *sensor_name, char *chip_name, int type)
{
char *save_ptr;
const char *token;
char temp[SYSFS_MAXLEN];
strlcpy(temp, sensor_name, SYSFS_MAXLEN);
token = strtok_r(temp, "-_ ", &save_ptr);
if (token == NULL)
token = "";
strlcpy(chip_name, token, SYSFS_MAXLEN);
strlcat(chip_name, "-", SYSFS_MAXLEN);
strlcat(chip_name, type_to_name(type), SYSFS_MAXLEN);
}
int NativeSensorManager::getDataInfo() {
int i, j;
struct SensorContext *list;
int has_acc = 0;
int has_compass = 0;
int has_gyro = 0;
int has_light = 0;
int has_proximity = 0;
struct sensor_t sensor_mag;
struct sensor_t sensor_acc;
struct sensor_t sensor_light;
struct sensor_t sensor_proximity;
struct sensor_t sensor_gyro;
mSensorCount = getSensorListInner();
for (i = 0; i < mSensorCount; i++) {
struct SensorRefMap *item;
list = &context[i];
list->is_virtual = false;
item = new struct SensorRefMap;
item->ctx = list;
/* hardware sensor depend on itself */
list_add_tail(&list->dep_list, &item->list);
if (strlen(list->data_path) != 0)
list->data_fd = open(list->data_path, O_RDONLY | O_CLOEXEC | O_NONBLOCK);
else
list->data_fd = -1;
if (list->data_fd > 0) {
fd_map.add(list->data_fd, list);
} else {
ALOGE("open %s failed, continue anyway.(%s)\n", list->data_path, strerror(errno));
}
type_map.add(list->sensor->type, list);
handle_map.add(list->sensor->handle, list);
switch (list->sensor->type) {
case SENSOR_TYPE_ACCELEROMETER:
has_acc = 1;
list->driver = new AccelSensor(list);
sensor_acc = *(list->sensor);
break;
case SENSOR_TYPE_MAGNETIC_FIELD:
has_compass = 1;
list->driver = new CompassSensor(list);
sensor_mag = *(list->sensor);
break;
case SENSOR_TYPE_PROXIMITY:
has_proximity = 1;
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
/* reporting mode fix up */
list->sensor->flags |= SENSOR_FLAG_ON_CHANGE_MODE;
#endif
list->driver = new ProximitySensor(list);
sensor_proximity = *(list->sensor);
break;
case SENSOR_TYPE_LIGHT:
has_light = 1;
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
/* reporting mode fix up */
list->sensor->flags |= SENSOR_FLAG_ON_CHANGE_MODE;
#endif
list->driver = new LightSensor(list);
sensor_light = *(list->sensor);
break;
case SENSOR_TYPE_GYROSCOPE:
has_gyro = 1;
list->driver = new GyroSensor(list);
sensor_gyro = *(list->sensor);
break;
case SENSOR_TYPE_PRESSURE:
list->driver = new PressureSensor(list);
break;
default:
list->driver = NULL;
ALOGE("No handle %d for this type sensor!", i);
break;
}
initCalibrate(list);
}
/* Some vendor or the reference design implements some virtual sensors
* or pseudo sensors. These sensors are required by some of the applications.
* Here we check the CalibratoinManager to decide whether to enable them.
*/
CalibrationManager &cm(CalibrationManager::getInstance());
struct SensorRefMap *ref;
char *chip;
if (has_light && has_proximity) {
compositeVirtualSensorName(sensor_proximity.name, virtualSensorName[POCKET], SENSOR_TYPE_POCKET);
ALOGD("pocket virtual sensor name changed to %s\n", virtualSensorName[POCKET]);
if (!initVirtualSensor(&context[mSensorCount], SENSORS_HANDLE(mSensorCount),
virtualSensorList[POCKET])) {
addDependency(&context[mSensorCount], sensor_proximity.handle);
addDependency(&context[mSensorCount], sensor_light.handle);
mSensorCount++;
}
}
if (has_acc && has_compass) {
compositeVirtualSensorName(sensor_mag.name, virtualSensorName[ORIENTATION], SENSOR_TYPE_ORIENTATION);
ALOGD("orientation virtual sensor name changed to %s\n", virtualSensorName[ORIENTATION]);
/* HAL implemented orientation. Android will replace it for
* platform with Gyro with SensorFusion.
* The calibration manager will first match "oem-orientation" and
* then match "orientation" to select the algorithms. */
if (!initVirtualSensor(&context[mSensorCount], SENSORS_HANDLE(mSensorCount),
virtualSensorList[ORIENTATION])) {
addDependency(&context[mSensorCount], sensor_acc.handle);
addDependency(&context[mSensorCount], sensor_mag.handle);
mSensorCount++;
}
if (!has_gyro) {
compositeVirtualSensorName(sensor_mag.name, virtualSensorName[ORIENTATION], SENSOR_TYPE_ORIENTATION);
ALOGD("orientation virtual sensor name changed to %s\n", virtualSensorName[ORIENTATION]);
/* Pseudo gyroscope is a pseudo sensor which implements by accelerometer and
* magnetometer. Some sensor vendors provide such implementations. The pseudo
* gyroscope sensor is low cost but the performance is worse than the actual
* gyroscope. So disable it for the system with actual gyroscope. */
if (!initVirtualSensor(&context[mSensorCount], SENSORS_HANDLE(mSensorCount),
virtualSensorList[PSEUDO_GYROSCOPE])) {
addDependency(&context[mSensorCount], sensor_acc.handle);
addDependency(&context[mSensorCount], sensor_mag.handle);
mSensorCount++;
}
compositeVirtualSensorName(sensor_mag.name, virtualSensorName[LINEAR_ACCELERATION], SENSOR_TYPE_LINEAR_ACCELERATION);
ALOGD("liear acceleration virtual sensor name changed to %s\n", virtualSensorName[ORIENTATION]);
/* For linear acceleration */
if (!initVirtualSensor(&context[mSensorCount], SENSORS_HANDLE(mSensorCount),
virtualSensorList[LINEAR_ACCELERATION])) {
addDependency(&context[mSensorCount], sensor_acc.handle);
addDependency(&context[mSensorCount], sensor_mag.handle);
mSensorCount++;
}
compositeVirtualSensorName(sensor_mag.name, virtualSensorName[ROTATION_VECTOR], SENSOR_TYPE_ROTATION_VECTOR);
ALOGD("rotation vector virtual sensor name changed to %s\n", virtualSensorName[ROTATION_VECTOR]);
/* For rotation vector */
if (!initVirtualSensor(&context[mSensorCount], SENSORS_HANDLE(mSensorCount),
virtualSensorList[ROTATION_VECTOR])) {
addDependency(&context[mSensorCount], sensor_acc.handle);
addDependency(&context[mSensorCount], sensor_mag.handle);
mSensorCount++;
}
compositeVirtualSensorName(sensor_mag.name, virtualSensorName[GRAVITY], SENSOR_TYPE_GRAVITY);
ALOGD("gravity virtual sensor name changed to %s\n", virtualSensorName[GRAVITY]);
/* For gravity */
if (!initVirtualSensor(&context[mSensorCount], SENSORS_HANDLE(mSensorCount),
virtualSensorList[GRAVITY])) {
addDependency(&context[mSensorCount], sensor_acc.handle);
addDependency(&context[mSensorCount], sensor_mag.handle);
mSensorCount++;
}
}
}
if (has_compass) {
/* The uncalibrated magnetic field sensor shares the same vendor/name as the
* calibrated one. */
sensor_mag.type = SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED;
if (!initVirtualSensor(&context[mSensorCount], SENSORS_HANDLE(mSensorCount),
sensor_mag)) {
addDependency(&context[mSensorCount], sensor_mag.handle);
mSensorCount++;
}
}
if (has_gyro) {
sensor_gyro.type = SENSOR_TYPE_GYROSCOPE_UNCALIBRATED;
if (!initVirtualSensor(&context[mSensorCount], SENSORS_HANDLE(mSensorCount),
sensor_gyro)) {
addDependency(&context[mSensorCount], sensor_gyro.handle);
mSensorCount++;
}
}
return 0;
}
/* Register a listener on "hw" for "virt".
* The "hw" specify the actual background sensor type, and "virt" is one kind of virtual sensor.
* Generally the virtual sensor specified by "virt" can only work when the hardware sensor specified
* by "hw" is activiated.
*/
int NativeSensorManager::registerListener(struct SensorContext *hw, struct SensorContext *virt)
{
struct listnode *node;
struct SensorContext *ctx;
struct SensorRefMap *item;
list_for_each(node, &hw->listener) {
item = node_to_item(node, struct SensorRefMap, list);
if (item->ctx->sensor->handle == virt->sensor->handle) {
ALOGE("Already registered as listener for %s:%s\n", hw->sensor->name, virt->sensor->name);
return -1;
}
}
item = new SensorRefMap;
item->ctx = virt;
list_add_tail(&hw->listener, &item->list);
return 0;
}
/* Remove the virtual sensor listener from the list specified by "hw" */
int NativeSensorManager::unregisterListener(struct SensorContext *hw, struct SensorContext *virt)
{
struct listnode *node;
struct listnode *n;
struct SensorContext *ctx;
struct SensorRefMap *item;
list_for_each_safe(node, n, &hw->listener) {
item = node_to_item(node, struct SensorRefMap, list);
if (item->ctx == virt) {
list_remove(&item->list);
delete item;
return 0;
}
}
ALOGE("%s is not a listener of %s\n", virt->sensor->name, hw->sensor->name);
return -1;
}
int NativeSensorManager::getSensorList(const sensor_t **list) {
*list = mSensorCount ? sensor_list:NULL;
return mSensorCount;
}
int NativeSensorManager::getNode(char *buf, char *path, const struct SysfsMap *map) {
char * fret;
ssize_t len = 0;
int fd;
char tmp[SYSFS_MAXLEN];
if (NULL == buf || NULL == path)
return -1;
memset(tmp, 0, sizeof(tmp));
fd = open(path, O_RDONLY);
if (fd < 0) {
ALOGE("open %s failed.(%s)\n", path, strerror(errno));
/* Ignore unrequired nodes for backward compatiblity */
return map->required ? -1 : 0;
}
len = read(fd, tmp, sizeof(tmp) - 1);
if ((len <= 0) || (strlen(tmp) == 0)) {
ALOGE("read %s failed.(%s)\n", path, strerror(errno));
close(fd);
/* Ignore unrequired nodes for backward compatiblity */
return map->required ? -1 : 0;
}
tmp[len - 1] = '\0';
if (tmp[strlen(tmp) - 1] == '\n')
tmp[strlen(tmp) - 1] = '\0';
if (map->type == TYPE_INTEGER) {
int *p = (int *)(buf + map->offset);
*p = atoi(tmp);
} else if (map->type == TYPE_STRING) {
char **p = (char **)(buf + map->offset);
strlcpy(*p, tmp, SYSFS_MAXLEN);
} else if (map->type == TYPE_FLOAT) {
float *p = (float*)(buf + map->offset);
*p = atof(tmp);
} else if (map->type == TYPE_INTEGER64) {
int64_t *p = (int64_t *)(buf + map->offset);
*p = atoll(tmp);
}
close(fd);
return 0;
}
int NativeSensorManager::getEventPathOld(const struct SensorContext *list, char *event_path)
{
struct dirent **namelist;
char *file;
char path[PATH_MAX];
char name[80];
int nNodes;
int fd = -1;
int j;
/* scan "/dev/input" to get information */
if (!mScanned) {
strlcpy(path, EVENT_PATH, sizeof(path));
file = path + strlen(EVENT_PATH);
nNodes = scandir(path, &namelist, 0, alphasort);
if (nNodes < 0) {
ALOGE("scan %s failed.(%s)\n", EVENT_PATH, strerror(errno));
return -1;
}
for (mEventCount = 0, j = 0; (j < nNodes) && (j < MAX_SENSORS); j++) {
if (namelist[j]->d_type != DT_CHR) {
continue;
}
strlcpy(file, namelist[j]->d_name, sizeof(path) - strlen(EVENT_PATH));
fd = open(path, O_RDONLY);
if (fd < 0) {
ALOGE("open %s failed(%s)", path, strerror(errno));
continue;
}
if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) {
name[0] = '\0';
}
strlcpy(event_list[mEventCount].data_name, name, sizeof(event_list[0].data_name));
strlcpy(event_list[mEventCount].data_path, path, sizeof(event_list[0].data_path));
close(fd);
mEventCount++;
}
for (j = 0; j <nNodes; j++ ) {
free(namelist[j]);
}
free(namelist);
mScanned = true;
}
/* Initialize data_path and data_fd */
for (j = 0; (j < mEventCount) && (j < MAX_SENSORS); j++) {
if (strcmp(list->sensor->name, event_list[j].data_name) == 0) {
strlcpy(event_path, event_list[j].data_path, PATH_MAX);
break;
}
if (strcmp(event_list[j].data_name, type_to_name(list->sensor->type)) == 0) {
strlcpy(event_path, event_list[j].data_path, PATH_MAX);
}
}
return 0;
}
int NativeSensorManager::getEventPath(const char *sysfs_path, char *event_path)
{
DIR *dir;
struct dirent *de;
char symlink[PATH_MAX];
int len;
char *needle;
dir = opendir(sysfs_path);
if (dir == NULL) {
ALOGE("open %s failed.(%s)\n", strerror(errno));
return -1;
}
if ((sysfs_path == NULL) || (event_path == NULL)) {
ALOGE("invalid NULL argument.");
return -EINVAL;
}
len = readlink(sysfs_path, symlink, PATH_MAX);
if (len < 0) {
ALOGE("readlink failed for %s(%s)\n", sysfs_path, strerror(errno));
return -1;
}
needle = strrchr(symlink, '/');
if (needle == NULL) {
ALOGE("unexpected symlink %s\n", symlink);
return -1;
}
if (strncmp(needle + 1, "input", strlen("input")) != 0) {
ALOGE("\n");
ALOGE("==========================Notice=================================");
ALOGE("sensors_classdev %s need to register as the child of input device\n", sysfs_path);
ALOGE("in order to speed up Android sensor service initialization time");
ALOGE("Please update your sensor driver.");
ALOGE("================================================================");
ALOGE("\n");
return -ENODEV;
}
strlcpy(event_path, EVENT_PATH, PATH_MAX);
while ((de = readdir(dir))) {
if (strncmp(de->d_name, "event", strlen("event")) == 0) {
strlcat(event_path, de->d_name, sizeof(de->d_name));
break;
}
}
closedir(dir);
return 0;
}
int NativeSensorManager::getSensorListInner()
{
int number = 0;
int err = -1;
const char *dirname = SYSFS_CLASS;
char devname[PATH_MAX];
char *filename;
char *nodename;
DIR *dir;
struct dirent *de;
struct SensorContext *list;
unsigned int i;
dir = opendir(dirname);
if(dir == NULL) {
return 0;
}
strlcpy(devname, dirname, PATH_MAX);
filename = devname + strlen(devname);
while ((de = readdir(dir))) {
if(de->d_name[0] == '.' &&
(de->d_name[1] == '\0' ||
(de->d_name[1] == '.' && de->d_name[2] == '\0')))
continue;
list = &context[number];
strlcpy(filename, de->d_name, PATH_MAX - strlen(SYSFS_CLASS));
nodename = filename + strlen(de->d_name);
*nodename++ = '/';
for (i = 0; i < ARRAY_SIZE(node_map); i++) {
strlcpy(nodename, node_map[i].node, PATH_MAX - strlen(SYSFS_CLASS) - strlen(de->d_name));
err = getNode((char*)(list->sensor), devname, &node_map[i]);
if (err) {
ALOGE("Get node for %s failed.\n", devname);
break;
}
}
if (i < ARRAY_SIZE(node_map))
continue;
if (!((1ULL << list->sensor->type) & SUPPORTED_SENSORS_TYPE))
continue;
/* Setup other information */
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
if (list->sensor->maxDelay == 0)
list->sensor->maxDelay = 10000000;
else
list->sensor->maxDelay = list->sensor->maxDelay * 1000; /* milliseconds to microseconds */
#endif
list->sensor->handle = SENSORS_HANDLE(number);
strlcpy(nodename, "", SYSFS_MAXLEN);
strlcpy(list->enable_path, devname, PATH_MAX);
/* initialize data path */
strlcpy(nodename, "device", SYSFS_MAXLEN);
if (getEventPath(devname, list->data_path) == -ENODEV) {
getEventPathOld(list, list->data_path);
}
number++;
}
closedir(dir);
return number;
}
int NativeSensorManager::activate(int handle, int enable)
{
SensorContext *list;
int i;
int number = getSensorCount();
int err = 0;
struct listnode *node;
struct SensorContext *ctx;
struct SensorRefMap *item;
ALOGD("activate called handle:%d enable:%d", handle, enable);
list = getInfoByHandle(handle);
if (list == NULL) {
ALOGE("Invalid handle(%d)", handle);
return -EINVAL;
}
list->enable = enable;
/* Search for the background sensor for the sensor specified by handle. */
list_for_each(node, &list->dep_list) {
item = node_to_item(node, struct SensorRefMap, list);
if (enable) {
registerListener(item->ctx, list);
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
/* HAL 1.3 already set listener's delay and latency
* Sync it right now to make it take effect.
*/
syncDelay(item->ctx->sensor->handle);
syncLatency(item->ctx->sensor->handle);
#endif
/* Enable the background sensor and register a listener on it. */
ALOGD("%s calling driver enable", item->ctx->sensor->name);
item->ctx->driver->enable(item->ctx->sensor->handle, 1);
} else {
/* The background sensor has other listeners, we need
* to unregister the current sensor from it and sync the
* poll delay settings.
*/
if (!list_empty(&item->ctx->listener)) {
unregisterListener(item->ctx, list);
/* restore delay settings */
syncDelay(item->ctx->sensor->handle);
#if defined(SENSORS_DEVICE_API_VERSION_1_3)
/* restore latency settings */
syncLatency(item->ctx->sensor->handle);
#endif
}
/* Disable the background sensor if it doesn't have any listeners. */
if (list_empty(&item->ctx->listener)) {
ALOGD("%s calling driver disable", item->ctx->sensor->name);
item->ctx->driver->enable(item->ctx->sensor->handle, 0);
}
}
}
/* Settings change notification */
if (list->is_virtual) {
ALOGD("%s calling driver %s", list->sensor->name, enable ? "enable" : "disable");
list->driver->enable(handle, enable);
}
return err;
}
int NativeSensorManager::syncDelay(int handle)
{
const SensorRefMap *item;
SensorContext *ctx;
const SensorContext *list;
struct listnode *node;
int64_t min_ns;
list = getInfoByHandle(handle);
if (list == NULL) {
ALOGE("Invalid handle(%d)", handle);
return -EINVAL;
}
if (list_empty(&list->listener))
return 0;
node = list_head(&list->listener);
item = node_to_item(node, struct SensorRefMap, list);
min_ns = item->ctx->delay_ns;
list_for_each(node, &list->listener) {
item = node_to_item(node, struct SensorRefMap, list);
ctx = item->ctx;
/* To handle some special case that the polling delay is 0. This
* may happen if the background sensor is not enabled but the virtual
* sensor is enabled case.
*/
if (ctx->delay_ns == 0) {
ALOGD("%s delay is 0. continue...", ctx->sensor->name);
continue;
}
if (min_ns > ctx->delay_ns)
min_ns = ctx->delay_ns;
}
/* For example, the min_delay of GYRO is set to 10000us in lsm6ds3_core.c, but there'll
* be 5ms when using cubetest. And there is "time threshold" in Sensors_class.c.
* So adding this threshold to avoid it.
*/
if (min_ns < list->sensor->minDelay*1000)
min_ns = list->sensor->minDelay*1000;
ALOGD("%s calling driver setDelay %d ms\n", list->sensor->name, min_ns / 1000000);
return list->driver->setDelay(list->sensor->handle, min_ns);
}
int NativeSensorManager::syncLatency(int handle)
{
const SensorRefMap *item;
SensorContext *ctx;
const SensorContext *list;
struct listnode *node;
int64_t min_ns;
list = getInfoByHandle(handle);
if (list == NULL) {
ALOGE("Invalid handle(%d)", handle);
return -EINVAL;
}
if (list_empty(&list->listener))
return 0;