text: /*
   * Copyright (C) 2008 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.
   */
  
  #include <hardware/sensors.h>
  
  #include "nusensors.h"
  
  /*****************************************************************************/
  
  /*
   * The SENSORS Module
   */
  
  /*
   * the AK8975 has a 8-bit ADC but the firmware seems to average 16 samples,
   * or at least makes its calibration on 12-bits values. This increases the
   * resolution by 4 bits.
   */
  
  static const struct sensor_t sSensorList[] = {
          { "BMA150 3-axis Accelerometer",
                  "Bosh",
                  1, SENSORS_HANDLE_BASE+ID_A,
                  SENSOR_TYPE_ACCELEROMETER, 4.0f*9.81f, (4.0f*9.81f)/256.0f, 0.2f, 0, { } },
          { "AK8975 3-axis Magnetic field sensor",
                  "Asahi Kasei",
                  1, SENSORS_HANDLE_BASE+ID_M,
                  SENSOR_TYPE_MAGNETIC_FIELD, 2000.0f, 1.0f/16.0f, 6.8f, 0, { } },
          { "AK8975 Orientation sensor",
                  "Asahi Kasei",
                  1, SENSORS_HANDLE_BASE+ID_O,
                  SENSOR_TYPE_ORIENTATION, 360.0f, 1.0f, 7.0f, 0, { } },
          { "CM3602 Proximity sensor",
                  "Capella Microsystems",
                  1, SENSORS_HANDLE_BASE+ID_P,
                  SENSOR_TYPE_PROXIMITY,
                  PROXIMITY_THRESHOLD_CM, PROXIMITY_THRESHOLD_CM,
                  0.5f, 0, { } },
          { "CM3602 Light sensor",
                  "Capella Microsystems",
                  1, SENSORS_HANDLE_BASE+ID_L,
                  SENSOR_TYPE_LIGHT, 1023.0f, 1.0f, 0.5f, 0, { } },
  };
  
  static int open_sensors(const struct hw_module_t* module, const char* name,
          struct hw_device_t** device);
  
  static int sensors__get_sensors_list(struct sensors_module_t* module,
          struct sensor_t const** list)
  {
      *list = sSensorList;
      return ARRAY_SIZE(sSensorList);
  }
  
  static struct hw_module_methods_t sensors_module_methods = {
      .open = open_sensors
  };
  
  struct sensors_module_t HAL_MODULE_INFO_SYM = {
      .common = {
          .tag = HARDWARE_MODULE_TAG,
          .version_major = 1,
          .version_minor = 0,
          .id = SENSORS_HARDWARE_MODULE_ID,
          .name = "AK8975A & CM3602 Sensors Module",
          .author = "The Android Open Source Project",
          .methods = &sensors_module_methods,
      },
      .get_sensors_list = sensors__get_sensors_list
  };
  
  /*****************************************************************************/
  
  static int open_sensors(const struct hw_module_t* module, const char* name,
          struct hw_device_t** device)
  {
      return init_nusensors(module, device);
  }
  