| /* |
| * Copyright (C) 2012 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_NDEBUG 0 |
| |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <math.h> |
| #include <unistd.h> |
| #include <dirent.h> |
| #include <sys/select.h> |
| #include <cutils/log.h> |
| #include <linux/input.h> |
| #include <string.h> |
| |
| #include "CompassSensor.IIO.primary.h" |
| #include "sensors.h" |
| #include "MPLSupport.h" |
| #include "sensor_params.h" |
| #include "ml_sysfs_helper.h" |
| |
| #define COMPASS_MAX_SYSFS_ATTRB sizeof(compassSysFs) / sizeof(char*) |
| #define COMPASS_NAME "USE_SYSFS" |
| |
| #if defined COMPASS_AK8975 |
| #pragma message("HAL:build Invensense compass cal with AK8975 on primary bus") |
| #define USE_MPL_COMPASS_HAL (1) |
| #define COMPASS_NAME "INV_AK8975" |
| #endif |
| |
| /******************************************************************************/ |
| |
| CompassSensor::CompassSensor() |
| : SensorBase(COMPASS_NAME, NULL), |
| mCompassTimestamp(0), |
| mCompassInputReader(8), |
| mCoilsResetFd(0) |
| { |
| FILE *fptr; |
| |
| VFUNC_LOG; |
| |
| mYasCompass = false; |
| if(!strcmp(dev_name, "USE_SYSFS")) { |
| char sensor_name[20]; |
| find_name_by_sensor_type("in_magn_x_raw", "iio:device", sensor_name); |
| strncpy(dev_full_name, sensor_name, |
| sizeof(dev_full_name) / sizeof(dev_full_name[0])); |
| if(!strncmp(dev_full_name, "yas", 3)) { |
| mYasCompass = true; |
| } |
| } else { |
| |
| #ifdef COMPASS_YAS53x |
| /* for YAS53x compasses, dev_name is just a prefix, |
| we need to find the actual name */ |
| if (fill_dev_full_name_by_prefix(dev_name, |
| dev_full_name, sizeof(dev_full_name) / sizeof(dev_full_name[0]))) { |
| LOGE("Cannot find Yamaha device with prefix name '%s' - " |
| "magnetometer will likely not work.", dev_name); |
| } else { |
| mYasCompass = true; |
| } |
| #else |
| strncpy(dev_full_name, dev_name, |
| sizeof(dev_full_name) / sizeof(dev_full_name[0])); |
| #endif |
| |
| } |
| |
| if (inv_init_sysfs_attributes()) { |
| LOGE("Error Instantiating Compass\n"); |
| return; |
| } |
| |
| if (!strcmp(dev_full_name, "INV_COMPASS")) { |
| mI2CBus = COMPASS_BUS_SECONDARY; |
| } else { |
| mI2CBus = COMPASS_BUS_PRIMARY; |
| } |
| |
| memset(mCachedCompassData, 0, sizeof(mCachedCompassData)); |
| |
| if (!isIntegrated()) { |
| enable(ID_M, 0); |
| } |
| |
| LOGV_IF(SYSFS_VERBOSE, "HAL:compass name: %s", dev_full_name); |
| enable_iio_sysfs(); |
| |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:cat %s (%lld)", |
| compassSysFs.compass_orient, getTimestamp()); |
| fptr = fopen(compassSysFs.compass_orient, "r"); |
| if (fptr != NULL) { |
| int om[9]; |
| if (fscanf(fptr, "%d,%d,%d,%d,%d,%d,%d,%d,%d", |
| &om[0], &om[1], &om[2], &om[3], &om[4], &om[5], |
| &om[6], &om[7], &om[8]) < 0 || fclose(fptr)) { |
| LOGE("HAL:could not read compass mounting matrix"); |
| } else { |
| |
| LOGV_IF(EXTRA_VERBOSE, |
| "HAL:compass mounting matrix: " |
| "%+d %+d %+d %+d %+d %+d %+d %+d %+d", |
| om[0], om[1], om[2], om[3], om[4], om[5], om[6], om[7], om[8]); |
| |
| mCompassOrientation[0] = om[0]; |
| mCompassOrientation[1] = om[1]; |
| mCompassOrientation[2] = om[2]; |
| mCompassOrientation[3] = om[3]; |
| mCompassOrientation[4] = om[4]; |
| mCompassOrientation[5] = om[5]; |
| mCompassOrientation[6] = om[6]; |
| mCompassOrientation[7] = om[7]; |
| mCompassOrientation[8] = om[8]; |
| } |
| } |
| |
| if(mYasCompass) { |
| mCoilsResetFd = fopen(compassSysFs.compass_attr_1, "r+"); |
| if (fptr == NULL) { |
| LOGE("HAL:Could not open compass overunderflow"); |
| } |
| } |
| } |
| |
| void CompassSensor::enable_iio_sysfs() |
| { |
| VFUNC_LOG; |
| |
| int tempFd = 0; |
| char iio_device_node[MAX_CHIP_ID_LEN]; |
| FILE *tempFp = NULL; |
| const char* compass = dev_full_name; |
| |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %d > %s (%lld)", |
| 1, compassSysFs.in_timestamp_en, getTimestamp()); |
| write_sysfs_int(compassSysFs.in_timestamp_en, 1); |
| |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %d > %s (%lld)", |
| IIO_BUFFER_LENGTH, compassSysFs.buffer_length, getTimestamp()); |
| tempFp = fopen(compassSysFs.buffer_length, "w"); |
| if (tempFp == NULL) { |
| LOGE("HAL:could not open buffer length"); |
| } else { |
| if (fprintf(tempFp, "%d", IIO_BUFFER_LENGTH) < 0 || fclose(tempFp) < 0) { |
| LOGE("HAL:could not write buffer length"); |
| } |
| } |
| |
| sprintf(iio_device_node, "%s%d", "/dev/iio:device", |
| find_type_by_name(compass, "iio:device")); |
| compass_fd = open(iio_device_node, O_RDONLY); |
| int res = errno; |
| if (compass_fd < 0) { |
| LOGE("HAL:could not open '%s' iio device node in path '%s' - " |
| "error '%s' (%d)", |
| compass, iio_device_node, strerror(res), res); |
| } else { |
| LOGV_IF(EXTRA_VERBOSE, |
| "HAL:iio %s, compass_fd opened : %d", compass, compass_fd); |
| } |
| |
| /* TODO: need further tests for optimization to reduce context-switch |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo 1 > %s (%lld)", |
| compassSysFs.compass_x_fifo_enable, getTimestamp()); |
| tempFd = open(compassSysFs.compass_x_fifo_enable, O_RDWR); |
| res = errno; |
| if (tempFd > 0) { |
| res = enable_sysfs_sensor(tempFd, 1); |
| } else { |
| LOGE("HAL:open of %s failed with '%s' (%d)", |
| compassSysFs.compass_x_fifo_enable, strerror(res), res); |
| } |
| |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo 1 > %s (%lld)", |
| compassSysFs.compass_y_fifo_enable, getTimestamp()); |
| tempFd = open(compassSysFs.compass_y_fifo_enable, O_RDWR); |
| res = errno; |
| if (tempFd > 0) { |
| res = enable_sysfs_sensor(tempFd, 1); |
| } else { |
| LOGE("HAL:open of %s failed with '%s' (%d)", |
| compassSysFs.compass_y_fifo_enable, strerror(res), res); |
| } |
| |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo 1 > %s (%lld)", |
| compassSysFs.compass_z_fifo_enable, getTimestamp()); |
| tempFd = open(compassSysFs.compass_z_fifo_enable, O_RDWR); |
| res = errno; |
| if (tempFd > 0) { |
| res = enable_sysfs_sensor(tempFd, 1); |
| } else { |
| LOGE("HAL:open of %s failed with '%s' (%d)", |
| compassSysFs.compass_z_fifo_enable, strerror(res), res); |
| } |
| */ |
| } |
| |
| CompassSensor::~CompassSensor() |
| { |
| VFUNC_LOG; |
| |
| free(pathP); |
| if( compass_fd > 0) |
| close(compass_fd); |
| if(mYasCompass) { |
| if( mCoilsResetFd != NULL ) |
| fclose(mCoilsResetFd); |
| } |
| } |
| |
| int CompassSensor::getFd(void) const |
| { |
| VHANDLER_LOG; |
| LOGI_IF(0, "HAL:compass_fd=%d", compass_fd); |
| return compass_fd; |
| } |
| |
| /** |
| * @brief This function will enable/disable sensor. |
| * @param[in] handle |
| * which sensor to enable/disable. |
| * @param[in] en |
| * en=1, enable; |
| * en=0, disable |
| * @return if the operation is successful. |
| */ |
| int CompassSensor::enable(int32_t handle, int en) |
| { |
| VFUNC_LOG; |
| |
| mEnable = en; |
| int tempFd; |
| int res = 0; |
| |
| /* reset master enable */ |
| res = masterEnable(0); |
| if (res < 0) { |
| return res; |
| } |
| |
| if (en) { |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %d > %s (%lld)", |
| en, compassSysFs.compass_x_fifo_enable, getTimestamp()); |
| res = write_sysfs_int(compassSysFs.compass_x_fifo_enable, en); |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %d > %s (%lld)", |
| en, compassSysFs.compass_y_fifo_enable, getTimestamp()); |
| res += write_sysfs_int(compassSysFs.compass_y_fifo_enable, en); |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %d > %s (%lld)", |
| en, compassSysFs.compass_z_fifo_enable, getTimestamp()); |
| res += write_sysfs_int(compassSysFs.compass_z_fifo_enable, en); |
| |
| res = masterEnable(en); |
| if (res < en) { |
| return res; |
| } |
| } |
| |
| return res; |
| } |
| |
| int CompassSensor::masterEnable(int en) |
| { |
| VFUNC_LOG; |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %d > %s (%lld)", |
| en, compassSysFs.chip_enable, getTimestamp()); |
| return write_sysfs_int(compassSysFs.chip_enable, en); |
| } |
| |
| int CompassSensor::setDelay(int32_t handle, int64_t ns) |
| { |
| VFUNC_LOG; |
| int tempFd; |
| int res; |
| |
| mDelay = ns; |
| if (ns == 0) |
| return -1; |
| tempFd = open(compassSysFs.compass_rate, O_RDWR); |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:echo %.0f > %s (%lld)", |
| 1000000000.f / ns, compassSysFs.compass_rate, getTimestamp()); |
| res = write_attribute_sensor(tempFd, 1000000000.f / ns); |
| if(res < 0) { |
| LOGE("HAL:Compass update delay error"); |
| } |
| return res; |
| } |
| |
| /** |
| @brief This function will return the state of the sensor. |
| @return 1=enabled; 0=disabled |
| **/ |
| int CompassSensor::getEnable(int32_t handle) |
| { |
| VFUNC_LOG; |
| return mEnable; |
| } |
| |
| /* use for Invensense compass calibration */ |
| #define COMPASS_EVENT_DEBUG (0) |
| void CompassSensor::processCompassEvent(const input_event *event) |
| { |
| VHANDLER_LOG; |
| |
| switch (event->code) { |
| case EVENT_TYPE_ICOMPASS_X: |
| LOGV_IF(COMPASS_EVENT_DEBUG, "EVENT_TYPE_ICOMPASS_X\n"); |
| mCachedCompassData[0] = event->value; |
| break; |
| case EVENT_TYPE_ICOMPASS_Y: |
| LOGV_IF(COMPASS_EVENT_DEBUG, "EVENT_TYPE_ICOMPASS_Y\n"); |
| mCachedCompassData[1] = event->value; |
| break; |
| case EVENT_TYPE_ICOMPASS_Z: |
| LOGV_IF(COMPASS_EVENT_DEBUG, "EVENT_TYPE_ICOMPASS_Z\n"); |
| mCachedCompassData[2] = event->value; |
| break; |
| } |
| |
| mCompassTimestamp = |
| (int64_t)event->time.tv_sec * 1000000000L + event->time.tv_usec * 1000L; |
| } |
| |
| void CompassSensor::getOrientationMatrix(signed char *orient) |
| { |
| VFUNC_LOG; |
| memcpy(orient, mCompassOrientation, sizeof(mCompassOrientation)); |
| } |
| |
| long CompassSensor::getSensitivity() |
| { |
| VFUNC_LOG; |
| |
| long sensitivity; |
| LOGV_IF(SYSFS_VERBOSE, "HAL:sysfs:cat %s (%lld)", |
| compassSysFs.compass_scale, getTimestamp()); |
| inv_read_data(compassSysFs.compass_scale, &sensitivity); |
| return sensitivity; |
| } |
| |
| /** |
| @brief This function is called by sensors_mpl.cpp |
| to read sensor data from the driver. |
| @param[out] data sensor data is stored in this variable. Scaled such that |
| 1 uT = 2^16 |
| @para[in] timestamp data's timestamp |
| @return 1, if 1 sample read, 0, if not, negative if error |
| */ |
| int CompassSensor::readSample(long *data, int64_t *timestamp) { |
| VFUNC_LOG; |
| |
| int i; |
| char *rdata = mIIOBuffer; |
| |
| size_t rsize = read(compass_fd, rdata, (8 * mEnable + 8) * 1); |
| |
| if (!mEnable) { |
| rsize = read(compass_fd, rdata, (8 + 8) * IIO_BUFFER_LENGTH); |
| // LOGI("clear buffer with size: %d", rsize); |
| } |
| /* |
| LOGI("get one sample of AMI IIO data with size: %d", rsize); |
| LOGI_IF(mEnable, "compass x/y/z: %d/%d/%d", *((short *) (rdata + 0)), |
| *((short *) (rdata + 2)), *((short *) (rdata + 4))); |
| */ |
| if (mEnable) { |
| for (i = 0; i < 3; i++) { |
| data[i] = *((short *) (rdata + i * 2)); |
| } |
| *timestamp = *((long long *) (rdata + 8 * mEnable)); |
| } |
| |
| return mEnable; |
| } |
| |
| /** |
| * @brief This function will return the current delay for this sensor. |
| * @return delay in nanoseconds. |
| */ |
| int64_t CompassSensor::getDelay(int32_t handle) |
| { |
| VFUNC_LOG; |
| return mDelay; |
| } |
| |
| void CompassSensor::fillList(struct sensor_t *list) |
| { |
| VFUNC_LOG; |
| |
| const char *compass = dev_full_name; |
| |
| if (compass) { |
| if(!strcmp(compass, "INV_COMPASS")) { |
| list->maxRange = COMPASS_MPU9150_RANGE; |
| list->resolution = COMPASS_MPU9150_RESOLUTION; |
| list->power = COMPASS_MPU9150_POWER; |
| list->minDelay = COMPASS_MPU9150_MINDELAY; |
| mMinDelay = list->minDelay; |
| return; |
| } |
| if(!strcmp(compass, "compass") |
| || !strcmp(compass, "INV_AK8975") |
| || !strncmp(compass, "ak89xx", 2)) { |
| list->maxRange = COMPASS_AKM8975_RANGE; |
| list->resolution = COMPASS_AKM8975_RESOLUTION; |
| list->power = COMPASS_AKM8975_POWER; |
| list->minDelay = COMPASS_AKM8975_MINDELAY; |
| mMinDelay = list->minDelay; |
| return; |
| } |
| if(!strcmp(compass, "ami306")) { |
| list->maxRange = COMPASS_AMI306_RANGE; |
| list->resolution = COMPASS_AMI306_RESOLUTION; |
| list->power = COMPASS_AMI306_POWER; |
| list->minDelay = COMPASS_AMI306_MINDELAY; |
| mMinDelay = list->minDelay; |
| return; |
| } |
| if(!strcmp(compass, "yas530") |
| || !strcmp(compass, "yas532") |
| || !strcmp(compass, "yas533")) { |
| list->maxRange = COMPASS_YAS53x_RANGE; |
| list->resolution = COMPASS_YAS53x_RESOLUTION; |
| list->power = COMPASS_YAS53x_POWER; |
| list->minDelay = COMPASS_YAS53x_MINDELAY; |
| mMinDelay = list->minDelay; |
| return; |
| } |
| } |
| |
| LOGE("HAL:unknown compass id %s -- " |
| "params default to ak8975 and might be wrong.", |
| compass); |
| list->maxRange = COMPASS_AKM8975_RANGE; |
| list->resolution = COMPASS_AKM8975_RESOLUTION; |
| list->power = COMPASS_AKM8975_POWER; |
| list->minDelay = COMPASS_AKM8975_MINDELAY; |
| mMinDelay = list->minDelay; |
| } |
| |
| /* Read sysfs entry to determine whether overflow had happend |
| then write to sysfs to reset to zero */ |
| int CompassSensor::checkCoilsReset() |
| { |
| int result=-1; |
| VFUNC_LOG; |
| |
| if(mCoilsResetFd != NULL) { |
| int attr; |
| rewind(mCoilsResetFd); |
| fscanf(mCoilsResetFd, "%d", &attr); |
| if(attr == 0) |
| return 0; |
| else { |
| LOGV_IF(SYSFS_VERBOSE, "HAL:overflow detected"); |
| rewind(mCoilsResetFd); |
| if(fprintf(mCoilsResetFd, "%d", 0) < 0) |
| LOGE("HAL:could not write overunderflow"); |
| else |
| return 1; |
| } |
| } else { |
| LOGE("HAL:could not read overunderflow"); |
| } |
| return result; |
| } |
| |
| int CompassSensor::inv_init_sysfs_attributes(void) |
| { |
| VFUNC_LOG; |
| |
| unsigned char i = 0; |
| char sysfs_path[MAX_SYSFS_NAME_LEN], tbuf[2]; |
| char *sptr; |
| char **dptr; |
| int num; |
| const char* compass = dev_full_name; |
| |
| pathP = (char*)malloc( |
| sizeof(char[COMPASS_MAX_SYSFS_ATTRB][MAX_SYSFS_NAME_LEN])); |
| sptr = pathP; |
| dptr = (char**)&compassSysFs; |
| if (sptr == NULL) |
| return -1; |
| |
| do { |
| *dptr++ = sptr; |
| sptr += sizeof(char[MAX_SYSFS_NAME_LEN]); |
| } while (++i < COMPASS_MAX_SYSFS_ATTRB); |
| |
| // get proper (in absolute/relative) IIO path & build sysfs paths |
| sprintf(sysfs_path, "%s%d", "/sys/bus/iio/devices/iio:device", |
| find_type_by_name(compass, "iio:device")); |
| |
| #if defined COMPASS_AK8975 |
| inv_get_input_number(compass, &num); |
| tbuf[0] = num + 0x30; |
| tbuf[1] = 0; |
| sprintf(sysfs_path, "%s%s", "sys/class/input/input", tbuf); |
| strcat(sysfs_path, "/ak8975"); |
| |
| sprintf(compassSysFs.compass_enable, "%s%s", sysfs_path, "/enable"); |
| sprintf(compassSysFs.compass_rate, "%s%s", sysfs_path, "/rate"); |
| sprintf(compassSysFs.compass_scale, "%s%s", sysfs_path, "/scale"); |
| sprintf(compassSysFs.compass_orient, "%s%s", sysfs_path, "/compass_matrix"); |
| #else /* IIO */ |
| sprintf(compassSysFs.chip_enable, "%s%s", sysfs_path, "/buffer/enable"); |
| sprintf(compassSysFs.in_timestamp_en, "%s%s", sysfs_path, "/scan_elements/in_timestamp_en"); |
| sprintf(compassSysFs.buffer_length, "%s%s", sysfs_path, "/buffer/length"); |
| |
| sprintf(compassSysFs.compass_x_fifo_enable, "%s%s", sysfs_path, "/scan_elements/in_magn_x_en"); |
| sprintf(compassSysFs.compass_y_fifo_enable, "%s%s", sysfs_path, "/scan_elements/in_magn_y_en"); |
| sprintf(compassSysFs.compass_z_fifo_enable, "%s%s", sysfs_path, "/scan_elements/in_magn_z_en"); |
| sprintf(compassSysFs.compass_rate, "%s%s", sysfs_path, "/sampling_frequency"); |
| sprintf(compassSysFs.compass_scale, "%s%s", sysfs_path, "/in_magn_scale"); |
| sprintf(compassSysFs.compass_orient, "%s%s", sysfs_path, "/compass_matrix"); |
| |
| if(mYasCompass) { |
| sprintf(compassSysFs.compass_attr_1, "%s%s", sysfs_path, "/overunderflow"); |
| } |
| #endif |
| |
| #if 0 |
| // test print sysfs paths |
| dptr = (char**)&compassSysFs; |
| LOGI("sysfs path base: %s", sysfs_path); |
| for (i = 0; i < COMPASS_MAX_SYSFS_ATTRB; i++) { |
| LOGE("HAL:sysfs path: %s", *dptr++); |
| } |
| #endif |
| return 0; |
| } |
| |
| int CompassSensor::isYasCompass(void) |
| { |
| return mYasCompass; |
| } |
