Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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 | #include <fcntl.h> |
| 18 | #include <errno.h> |
| 19 | #include <math.h> |
| 20 | #include <poll.h> |
| 21 | #include <unistd.h> |
| 22 | #include <dirent.h> |
| 23 | #include <sys/select.h> |
| 24 | #include <cutils/log.h> |
| 25 | |
| 26 | #include "AccelSensor.h" |
| 27 | #include "sensors.h" |
| 28 | |
| 29 | #define FETCH_FULL_EVENT_BEFORE_RETURN 1 |
| 30 | #define IGNORE_EVENT_TIME 10000000 |
| 31 | |
| 32 | #define EVENT_TYPE_ACCEL_X ABS_X |
| 33 | #define EVENT_TYPE_ACCEL_Y ABS_Y |
| 34 | #define EVENT_TYPE_ACCEL_Z ABS_Z |
| 35 | |
Figo Wang | 6a20e3e | 2013-06-15 00:24:22 +0800 | [diff] [blame] | 36 | #define ACCEL_CONVERT ((GRAVITY_EARTH) / 1024) |
| 37 | #define CONVERT_ACCEL_X ACCEL_CONVERT |
| 38 | #define CONVERT_ACCEL_Y ACCEL_CONVERT |
| 39 | #define CONVERT_ACCEL_Z ACCEL_CONVERT |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 40 | |
Xiaocheng Li | dc76081 | 2013-07-08 19:11:41 -0700 | [diff] [blame] | 41 | #define SYSFS_I2C_SLAVE_PATH "/device/device/" |
| 42 | #define SYSFS_INPUT_DEV_PATH "/device/" |
| 43 | |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 44 | /*****************************************************************************/ |
| 45 | |
| 46 | AccelSensor::AccelSensor() |
Figo Wang | 6a20e3e | 2013-06-15 00:24:22 +0800 | [diff] [blame] | 47 | : SensorBase(NULL, "accelerometer"), |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 48 | mEnabled(0), |
| 49 | mInputReader(4), |
| 50 | mHasPendingEvent(false), |
| 51 | mEnabledTime(0) |
| 52 | { |
| 53 | mPendingEvent.version = sizeof(sensors_event_t); |
| 54 | mPendingEvent.sensor = SENSORS_ACCELERATION_HANDLE; |
| 55 | mPendingEvent.type = SENSOR_TYPE_ACCELEROMETER; |
| 56 | memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data)); |
| 57 | |
| 58 | if (data_fd) { |
| 59 | strcpy(input_sysfs_path, "/sys/class/input/"); |
| 60 | strcat(input_sysfs_path, input_name); |
Xiaocheng Li | dc76081 | 2013-07-08 19:11:41 -0700 | [diff] [blame] | 61 | strcat(input_sysfs_path, SYSFS_I2C_SLAVE_PATH); |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 62 | input_sysfs_path_len = strlen(input_sysfs_path); |
Xiaocheng Li | dc76081 | 2013-07-08 19:11:41 -0700 | [diff] [blame] | 63 | #ifdef TARGET_8610 |
| 64 | if (access(input_sysfs_path, F_OK)) { |
| 65 | input_sysfs_path_len -= strlen(SYSFS_I2C_SLAVE_PATH); |
| 66 | strcpy(&input_sysfs_path[input_sysfs_path_len], |
| 67 | SYSFS_INPUT_DEV_PATH); |
| 68 | input_sysfs_path_len += strlen(SYSFS_INPUT_DEV_PATH); |
| 69 | } |
| 70 | #endif |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 71 | enable(0, 1); |
| 72 | } |
| 73 | } |
| 74 | |
Jie Cheng | 4b6344d | 2013-12-30 13:31:49 +0800 | [diff] [blame] | 75 | AccelSensor::AccelSensor(char *name) |
| 76 | : SensorBase(NULL, "accelerometer"), |
| 77 | mEnabled(0), |
| 78 | mInputReader(4), |
| 79 | mHasPendingEvent(false), |
| 80 | mEnabledTime(0) |
| 81 | { |
| 82 | mPendingEvent.version = sizeof(sensors_event_t); |
| 83 | mPendingEvent.sensor = SENSORS_ACCELERATION_HANDLE; |
| 84 | mPendingEvent.type = SENSOR_TYPE_ACCELEROMETER; |
| 85 | memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data)); |
| 86 | |
| 87 | if (data_fd) { |
| 88 | strlcpy(input_sysfs_path, SYSFS_CLASS, sizeof(input_sysfs_path)); |
| 89 | strlcat(input_sysfs_path, "/", sizeof(input_sysfs_path)); |
| 90 | strlcat(input_sysfs_path, name, sizeof(input_sysfs_path)); |
| 91 | strlcat(input_sysfs_path, "/", sizeof(input_sysfs_path)); |
| 92 | input_sysfs_path_len = strlen(input_sysfs_path); |
Jie Cheng | fab048f | 2014-01-06 15:48:40 +0800 | [diff] [blame] | 93 | ALOGI("The accel sensor path is %s",input_sysfs_path); |
Jie Cheng | 4b6344d | 2013-12-30 13:31:49 +0800 | [diff] [blame] | 94 | enable(0, 1); |
| 95 | } |
Jie Cheng | 4b6344d | 2013-12-30 13:31:49 +0800 | [diff] [blame] | 96 | } |
| 97 | |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 98 | AccelSensor::~AccelSensor() { |
| 99 | if (mEnabled) { |
| 100 | enable(0, 0); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | int AccelSensor::setInitialState() { |
| 105 | struct input_absinfo absinfo_x; |
| 106 | struct input_absinfo absinfo_y; |
| 107 | struct input_absinfo absinfo_z; |
| 108 | float value; |
| 109 | if (!ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ACCEL_X), &absinfo_x) && |
| 110 | !ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ACCEL_Y), &absinfo_y) && |
| 111 | !ioctl(data_fd, EVIOCGABS(EVENT_TYPE_ACCEL_Z), &absinfo_z)) { |
| 112 | value = absinfo_x.value; |
| 113 | mPendingEvent.data[0] = value * CONVERT_ACCEL_X; |
| 114 | value = absinfo_y.value; |
| 115 | mPendingEvent.data[1] = value * CONVERT_ACCEL_Y; |
| 116 | value = absinfo_z.value; |
| 117 | mPendingEvent.data[2] = value * CONVERT_ACCEL_Z; |
| 118 | mHasPendingEvent = true; |
| 119 | } |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | int AccelSensor::enable(int32_t, int en) { |
| 124 | int flags = en ? 1 : 0; |
| 125 | if (flags != mEnabled) { |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 126 | int fd; |
Jie Cheng | fab048f | 2014-01-06 15:48:40 +0800 | [diff] [blame] | 127 | strlcpy(&input_sysfs_path[input_sysfs_path_len], |
| 128 | SYSFS_ENABLE, SYSFS_MAXLEN); |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 129 | fd = open(input_sysfs_path, O_RDWR); |
| 130 | if (fd >= 0) { |
| 131 | char buf[2]; |
| 132 | int err; |
| 133 | buf[1] = 0; |
| 134 | if (flags) { |
| 135 | buf[0] = '1'; |
| 136 | mEnabledTime = getTimestamp() + IGNORE_EVENT_TIME; |
| 137 | } else { |
| 138 | buf[0] = '0'; |
| 139 | } |
| 140 | err = write(fd, buf, sizeof(buf)); |
| 141 | close(fd); |
| 142 | mEnabled = flags; |
| 143 | setInitialState(); |
| 144 | return 0; |
| 145 | } |
Figo Wang | 6a20e3e | 2013-06-15 00:24:22 +0800 | [diff] [blame] | 146 | ALOGE("AccelSensor: failed to open %s", input_sysfs_path); |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 147 | return -1; |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 148 | } |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | bool AccelSensor::hasPendingEvents() const { |
| 153 | return mHasPendingEvent; |
| 154 | } |
| 155 | |
| 156 | int AccelSensor::setDelay(int32_t handle, int64_t delay_ns) |
| 157 | { |
| 158 | int fd; |
| 159 | int delay_ms = delay_ns / 1000000; |
Jie Cheng | fab048f | 2014-01-06 15:48:40 +0800 | [diff] [blame] | 160 | strlcpy(&input_sysfs_path[input_sysfs_path_len], |
| 161 | SYSFS_POLL_DELAY, SYSFS_MAXLEN); |
Wentao Xu | db82bb1 | 2013-01-14 18:26:04 -0500 | [diff] [blame] | 162 | fd = open(input_sysfs_path, O_RDWR); |
| 163 | if (fd >= 0) { |
| 164 | char buf[80]; |
| 165 | sprintf(buf, "%d", delay_ms); |
| 166 | write(fd, buf, strlen(buf)+1); |
| 167 | close(fd); |
| 168 | return 0; |
| 169 | } |
| 170 | return -1; |
| 171 | } |
| 172 | |
| 173 | int AccelSensor::readEvents(sensors_event_t* data, int count) |
| 174 | { |
| 175 | if (count < 1) |
| 176 | return -EINVAL; |
| 177 | |
| 178 | if (mHasPendingEvent) { |
| 179 | mHasPendingEvent = false; |
| 180 | mPendingEvent.timestamp = getTimestamp(); |
| 181 | *data = mPendingEvent; |
| 182 | return mEnabled ? 1 : 0; |
| 183 | } |
| 184 | |
| 185 | ssize_t n = mInputReader.fill(data_fd); |
| 186 | if (n < 0) |
| 187 | return n; |
| 188 | |
| 189 | int numEventReceived = 0; |
| 190 | input_event const* event; |
| 191 | |
| 192 | #if FETCH_FULL_EVENT_BEFORE_RETURN |
| 193 | again: |
| 194 | #endif |
| 195 | while (count && mInputReader.readEvent(&event)) { |
| 196 | int type = event->type; |
| 197 | if (type == EV_ABS) { |
| 198 | float value = event->value; |
| 199 | if (event->code == EVENT_TYPE_ACCEL_X) { |
| 200 | mPendingEvent.data[0] = value * CONVERT_ACCEL_X; |
| 201 | } else if (event->code == EVENT_TYPE_ACCEL_Y) { |
| 202 | mPendingEvent.data[1] = value * CONVERT_ACCEL_Y; |
| 203 | } else if (event->code == EVENT_TYPE_ACCEL_Z) { |
| 204 | mPendingEvent.data[2] = value * CONVERT_ACCEL_Z; |
| 205 | } |
| 206 | } else if (type == EV_SYN) { |
| 207 | mPendingEvent.timestamp = timevalToNano(event->time); |
| 208 | if (mEnabled) { |
| 209 | if (mPendingEvent.timestamp >= mEnabledTime) { |
| 210 | *data++ = mPendingEvent; |
| 211 | numEventReceived++; |
| 212 | } |
| 213 | count--; |
| 214 | } |
| 215 | } else { |
| 216 | ALOGE("AccelSensor: unknown event (type=%d, code=%d)", |
| 217 | type, event->code); |
| 218 | } |
| 219 | mInputReader.next(); |
| 220 | } |
| 221 | |
| 222 | #if FETCH_FULL_EVENT_BEFORE_RETURN |
| 223 | /* if we didn't read a complete event, see if we can fill and |
| 224 | try again instead of returning with nothing and redoing poll. */ |
| 225 | if (numEventReceived == 0 && mEnabled == 1) { |
| 226 | n = mInputReader.fill(data_fd); |
| 227 | if (n) |
| 228 | goto again; |
| 229 | } |
| 230 | #endif |
| 231 | |
| 232 | return numEventReceived; |
| 233 | } |
| 234 | |