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 <hardware/sensors.h>
18
19 #include "nusensors.h"
20
21 /*****************************************************************************/
22
23 /*
24 * The SENSORS Module
25 */
26
27 /*
28 * the AK8973 has a 8-bit ADC but the firmware seems to average 16 samples,
29 * or at least makes its calibration on 12-bits values. This increases the
30 * resolution by 4 bits.
31 */
32
33 static const struct sensor_t sSensorList[] = {
34 { "BMA150 3-axis Accelerometer",
35 "Bosh",
36 1, SENSORS_HANDLE_BASE+ID_A,
37 SENSOR_TYPE_ACCELEROMETER, 4.0f*9.81f, (4.0f*9.81f)/256.0f, 0.2f, 0, { } },
38 { "AK8973 3-axis Magnetic field sensor",
39 "Asahi Kasei",
40 1, SENSORS_HANDLE_BASE+ID_M,
41 SENSOR_TYPE_MAGNETIC_FIELD, 2000.0f, 1.0f/16.0f, 6.8f, 0, { } },
42 { "AK8973 Orientation sensor",
43 "Asahi Kasei",
44 1, SENSORS_HANDLE_BASE+ID_O,
45 SENSOR_TYPE_ORIENTATION, 360.0f, 1.0f, 7.0f, 0, { } },
46 { "CM3602 Proximity sensor",
47 "Capella Microsystems",
48 1, SENSORS_HANDLE_BASE+ID_P,
49 SENSOR_TYPE_PROXIMITY,
50 PROXIMITY_THRESHOLD_CM, PROXIMITY_THRESHOLD_CM,
51 0.5f, 0, { } },
52 { "CM3602 Light sensor",
53 "Capella Microsystems",
54 1, SENSORS_HANDLE_BASE+ID_L,
55 SENSOR_TYPE_LIGHT, 10240.0f, 1.0f, 0.5f, 0, { } },
56 };
57
58 static int open_sensors(const struct hw_module_t* module, const char* name,
59 struct hw_device_t** device);
60
sensors__get_sensors_list(struct sensors_module_t * module,struct sensor_t const ** list)61 static int sensors__get_sensors_list(struct sensors_module_t* module,
62 struct sensor_t const** list)
63 {
64 *list = sSensorList;
65 return ARRAY_SIZE(sSensorList);
66 }
67
68 static struct hw_module_methods_t sensors_module_methods = {
69 .open = open_sensors
70 };
71
72 const struct sensors_module_t HAL_MODULE_INFO_SYM = {
73 .common = {
74 .tag = HARDWARE_MODULE_TAG,
75 .version_major = 1,
76 .version_minor = 0,
77 .id = SENSORS_HARDWARE_MODULE_ID,
78 .name = "AK8973A & CM3602 Sensors Module",
79 .author = "The Android Open Source Project",
80 .methods = &sensors_module_methods,
81 },
82 .get_sensors_list = sensors__get_sensors_list
83 };
84
85 /*****************************************************************************/
86
open_sensors(const struct hw_module_t * module,const char * name,struct hw_device_t ** device)87 static int open_sensors(const struct hw_module_t* module, const char* name,
88 struct hw_device_t** device)
89 {
90 return init_nusensors(module, device);
91 }
92