1 /* 2 * Copyright (C) 2008-2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef CROS_EC_SENSORS_H 18 #define CROS_EC_SENSORS_H 19 20 #include <errno.h> 21 #include <stdint.h> 22 #include <sys/cdefs.h> 23 #include <sys/types.h> 24 #include <utils/BitSet.h> 25 26 #include <hardware/sensors.h> 27 28 #define IIO_DIR "/sys/bus/iio/devices/" 29 #define IIO_MAX_NAME_LENGTH 30 30 #define IIO_MAX_BUFF_SIZE 4096 31 #define INT32_CHAR_LEN 12 32 33 #define IIO_MAX_DEVICE_NAME_LENGTH (strlen(IIO_DIR) + IIO_MAX_NAME_LENGTH) 34 35 #define CROS_EC_MAX_SAMPLING_PERIOD ((1 << 16) - 2) 36 37 enum {X, Y, Z, MAX_AXIS}; 38 39 extern const char *cros_ec_sensor_names[]; 40 41 #define CROS_EC_EVENT_FLUSH_FLAG 0x1 42 #define CROS_EC_EVENT_WAKEUP_FLAG 0x2 43 44 #define CROS_EC_MAX_PHYSICAL_SENSOR 256 45 46 enum cros_ec_gesture { 47 CROS_EC_SIGMO, 48 CROS_EC_MAX_GESTURE, 49 }; 50 51 52 /*****************************************************************************/ 53 /* from ec_commands.h */ 54 struct cros_ec_event { 55 uint8_t sensor_id; 56 uint8_t flags; 57 union { 58 int16_t vector[MAX_AXIS]; 59 struct { 60 uint8_t activity; 61 uint8_t state; 62 uint16_t add_info[2]; 63 }; 64 }; 65 uint64_t timestamp; 66 } __packed; 67 68 enum motionsensor_activity { 69 MOTIONSENSE_ACTIVITY_RESERVED = 0, 70 MOTIONSENSE_ACTIVITY_SIG_MOTION = 1, 71 MOTIONSENSE_MAX_ACTIVITY, 72 }; 73 74 75 /*****************************************************************************/ 76 77 enum cros_ec_sensor_device { 78 CROS_EC_ACCEL, 79 CROS_EC_GYRO, 80 CROS_EC_MAG, 81 CROS_EC_PROX, 82 CROS_EC_LIGHT, 83 CROS_EC_ACTIVITY, 84 CROS_EC_RING, /* should be the last device */ 85 CROS_EC_MAX_DEVICE, 86 }; 87 88 struct cros_ec_sensor_info { 89 /* description of the sensor, as reported to sensorservice. */ 90 sensor_t sensor_data; 91 enum cros_ec_sensor_device type; 92 const char *device_name; 93 int64_t sampling_period_ns; 94 int64_t max_report_latency_ns; 95 bool enabled; 96 }; 97 98 struct cros_ec_gesture_info { 99 /* For activities managed by the sensor interface */ 100 sensor_t sensor_data; 101 const char *device_name; 102 const char *enable_entry; 103 bool enabled; 104 }; 105 106 /* 107 * To write sysfs parameters: IIO_DIR is appended before path. 108 */ 109 int cros_ec_sysfs_set_input_attr(const char *path, const char *attr, const char *value, size_t len); 110 int cros_ec_sysfs_set_input_attr_by_int(const char *path, const char *attr, int value); 111 112 /* 113 * To read sysfs parameters: IIO_DIR is NOT appended. 114 */ 115 int cros_ec_sysfs_get_attr(const char *path, const char *attr, char *output); 116 117 class CrosECSensor { 118 struct cros_ec_sensor_info *mSensorInfo; 119 size_t mSensorNb; 120 struct cros_ec_gesture_info *mGestureInfo; 121 size_t mGestureNb; 122 char mRingPath[IIO_MAX_DEVICE_NAME_LENGTH]; 123 cros_ec_event mEvents[IIO_MAX_BUFF_SIZE]; 124 int mDataFd; 125 126 int processEvent(sensors_event_t* data, const cros_ec_event *event); 127 public: 128 CrosECSensor( 129 struct cros_ec_sensor_info *sensor_info, 130 size_t sensor_nb, 131 struct cros_ec_gesture_info *gesture_info, 132 size_t gesture_nb, 133 const char *ring_device_name, 134 const char *trigger_name); 135 virtual ~CrosECSensor(); 136 virtual int getFd(void); 137 int readEvents(sensors_event_t* data, int count); 138 139 virtual int activate(int handle, int enabled); 140 virtual int batch(int handle, int64_t period_ns, int64_t timeout); 141 virtual int flush(int handle); 142 }; 143 144 #endif // CROS_EC_SENSORS_H 145
