qcom sensor_def_qcomdev.conf 分析

1、高通配置文件sensor_def_qcomdev.conf研究（主要参考高通官方文档）

During bootup, the sns.reg registry file (in /persist/sensors) is generated by the
sensors daemon using sensor_def_*.conf (located in /etc/sensors)

After the sns.reg is generated, during any further reboots, it is not updated until
the .conf file is updated with some changes with the updated version number
 

（0）I2C/SPI bus
Use the following information for I2C/SPI bus configurations.
I2C - 0xY
SPI - 0x100Y (bit12 is 1 mean is SPI bus)
Where Y = BLSP#
Ex I2C - BLSP5 change to SPI - BLSP3:
1922 5 0x00010001 #i2c_bus
To
1922 0x1003 0x00010001 #spi_bus

（1）、sensor_id 配置

    0         Accelerometer   Temperature
    10        Gyro            Temperature
    20        Magnetometer    Temperature
    30        Pressure        Temperature
    40        Proximity       Ambient light
    50        Humidity        Temperature
    60        RGB             Color Temperature/Clear
    70        SAR             Specific Absorption Rate
    80        HallEffect      none
    90        HeartRate       Raw data(Optional)
    100       Ultra-violet    Ambient light
    220       Step            none
    222       Step Count      none
    224       SMD             none
    226       GameRV          none
    228       IR Gesture      Proximity
    230       Double-tap      Single-tap
    240-249   OEM-defined     OEM-defined

（2）reg_group_id

 Group ID's required by Accel device drivers */
#define SNS_REG_DRIVER_GROUP_ACCEL_V02 1000
#define SNS_REG_DRIVER_GROUP_ACCEL_2_V02 1001
#define SNS_REG_DRIVER_GROUP_ACCEL_3_V02 1002
#define SNS_REG_DRIVER_GROUP_ACCEL_4_V02 1003
#define SNS_REG_DRIVER_GROUP_ACCEL_5_V02 1004

/**  Group ID's required by Gyro device drivers */
#define SNS_REG_DRIVER_GROUP_GYRO_V02 1010
#define SNS_REG_DRIVER_GROUP_GYRO_2_V02 1011
#define SNS_REG_DRIVER_GROUP_GYRO_3_V02 1012
#define SNS_REG_DRIVER_GROUP_GYRO_4_V02 1013
#define SNS_REG_DRIVER_GROUP_GYRO_5_V02 1014

/**  Group ID's required by Mag device drivers */
#define SNS_REG_DRIVER_GROUP_MAG_V02 1020
#define SNS_REG_DRIVER_GROUP_MAG_2_V02 1021
#define SNS_REG_DRIVER_GROUP_MAG_3_V02 1022
#define SNS_REG_DRIVER_GROUP_MAG_4_V02 1023
#define SNS_REG_DRIVER_GROUP_MAG_5_V02 1024

(3)

(1) Polling (0x00) 调用一次getI2C/SPI bus
Use the following information for I2C/SPI bus configurations.
I2C - 0xY
SPI - 0x100Y (bit12 is 1 mean is SPI bus)
Where Y = BLSP#
Ex I2C - BLSP5 change to SPI - BLSP3:
1922 5 0x00010001 #i2c_bus
To
1922 0x1003 0x00010001 #spi_bus_data后启动timer，等到timer到时间后调用sns_ddf_driver_if_s中指定的handle_timer()函数上报一组传感器数据

(2) DRI (0x80) 调用enable_sched_data()启用DRI（Data ReadyInterrupt，数据完成中断），按照set_cycle_time指定的ODR（Output Data Rate，数据I2C/SPI bus
Use the following information for I2C/SPI bus configurations.
I2C - 0xY
SPI - 0x100Y (bit12 is 1 mean is SPI bus)
Where Y = BLSP#
Ex I2C - BLSP5 change to SPII2C/SPI bus
Use the following information for I2C/SPI bus configurations.
I2C - 0xY
SPI - 0x100Y (bit12 is 1 mean is SPI bus)
Where Y = BLSP#
Ex I2C - BLSP5 change to SPI - BLSP3:
1922 5 0x00010001 #i2c_bus
To
1922 0x1003 0x00010001 #spi_bus - BLSP3:
1922 5 0x00010001 #i2c_bus
To
1922 0x1003 0x00010001 #spi_bus输出速率）进行数据采集，采集完成后调用sns_ddf_driver_if_s中指定的handle_irq()函数上报传感器数据。

(3) FIFO (0xD0) 调用trigger_fifo_data()函数启动FIFO模式，当数据量到达指定的阈值，触发sns_ddf_smgr_data_notify()函数上报一批数据。

一般加速度、陀螺仪等数据量较大的使用FIFO模式，光线、距离等有数据有变化才需要上报的传感器使用DRI模式

（4）Accel reg item ID  – 700, 701, 702
         Gyro  reg item  ID  – 800, 801, 802
         Mag   reg item  ID  – 900, 901, 902

# Orientation of sensors（正常是 1 2 3 第二列应该是x和y轴交换）待验证？
# accel x/y/z
700  -2 0x00010001 #accel-x-axis    //  此处表示y轴
701   1 0x00010001 #accel-y-axis
702   3 0x00010001 #accel-z-axis    //  z轴不变

sensor包括加速度，陀螺仪和地磁都需要坐标轴的转换，存在nv的那个位置呢，在sns_reg_api_v02.h这个文件中：
/**  Item ID's corresponding to group SNS_REG_DRIVER_GROUP_ACCEL (Group Id: 1000)  */
#define SNS_REG_DRIVER_ACCEL_X_ORIENT_V02 700
#define SNS_REG_DRIVER_ACCEL_Y_ORIENT_V02 701
#define SNS_REG_DRIVER_ACCEL_Z_ORIENT_V02 702
 
/**  Item ID's corresponding to group SNS_REG_DRIVER_GROUP_GYRO (Group Id: 1010)  */
#define SNS_REG_DRIVER_GYRO_X_ORIENT_V02 800
#define SNS_REG_DRIVER_GYRO_Y_ORIENT_V02 801
#define SNS_REG_DRIVER_GYRO_Z_ORIENT_V02 802
 
/**  Item ID's corresponding to group SNS_REG_DRIVER_GROUP_MAG (Group Id: 1020)  */
#define SNS_REG_DRIVER_MAG_X_ORIENT_V02 900
#define SNS_REG_DRIVER_MAG_Y_ORIENT_V02 901
#define SNS_REG_DRIVER_MAG_Z_ORIENT_V02 902
 

(5)修改I2C频率

#define SNS_DDF_DEFAULT_I2C_BUS_FREQ   400   //  or 100

(6)

通常使用gpio1中断引脚，gpio2一般为0xFFFF.

(7) data_type1 和 data_type2

定义主要的数据类型和第二数据类型，比如：gyro and temperature, or proximity and light 定义位置：sns_ddf_sensor_e  (sns_ddf_common.h)

typedef enum
{
  SNS_DDF_SENSOR__NONE, // 0
  SNS_DDF_SENSOR_ACCEL, // 1
  SNS_DDF_SENSOR_MAG, // 2
  SNS_DDF_SENSOR_GYRO, // 3
  SNS_DDF_SENSOR_TEMP, // 4
  SNS_DDF_SENSOR_PROXIMITY, // 5
  SNS_DDF_SENSOR_AMBIENT, // 6
  SNS_DDF_SENSOR_PRESSURE, // 7
  SNS_DDF_SENSOR_MAG_6D, // 8
  SNS_DDF_SENSOR_GYRO_6D, // 9
  SNS_DDF_SENSOR_DOUBLETAP, // 10
  SNS_DDF_SENSOR_SINGLETAP, // 11
  SNS_DDF_SENSOR_IR_GESTURE, //12

.................................................

};

(8) 灵敏度缺省值

This selects the device range to use. The value is equal to the index of the desired range in the list
of supported ranges. A typical example of sensitivity_default values as used by an accelerometer
driver is shown in the following table.
sensitivity_default value Accelerometer
range
0 ±2
1 ±4
2 ±8
3 ±16
A typical example of sensitivity_default values as used by a gyro driver is shown in the following
table.sensitivity_default value Gyro range (dps)
0 ± 200
1 ± 500
2 ± 1000
3 ± 2000
The exact meaning of each range value varies depending on the sensor.

(9)Base registry indexes

Configuration ID   Base registry index

0 1902

1 1918

2 1934

3 1950

4 1966

5 3602

6 3618

7 3634

8 3650

9 3666

10 5502

11 5518

(10)

:version A positive, nonzero version number for the file. It should be equal to the largest version number of any item.

:hardware

Items from the configuration file will only be used if the hardware string value is a substring of the /proc/cpuinfo string. It can be used more than once so that one file can support more than one hardware. If set to an empty string, it indicates common item values for all hardware.

:platform The string must match the text of either /sys/devices/soc0/hw_platform or /sys/device/soc0/platform_subtype, or can be an empty string to indicate common item values for all platforms.

:property Has two inputs, a system property key and a desired property value. Items will only be applied if the system property value matches the desired value. Can be set to an empty string to indicate common item values for all properties

(11)The UUID is stored in Little Endian format.

二、bring up ssc

1. Make sure that HAL is present. for 8992/8994 platform: /system/vendor/lib/hw/sensors.msm8994.so

for 8996/8998/SDM660/8952/8976/8917/8937/8953/8940 platform /system/lib64/hw/sensors.msm89xx.so /system/vendor/lib64/sensors.ssc.so

2. Make sure sensors daemon is present ps -x |grep sensors.qcom

3. Make sure the directory /persist/sensors/ is created and registry file sns.reg is present in /persist/ sensors/ ls /persist/sensors/sns.reg

4. check sensor enable flag "sensors_settings" should be 1: cat /persist/sensors/sensors_settings

5.These changes are in the init.qcom.sh file. /device/qcom/common/rootdir/etc/init.qcom.sensors.sh start_sensors() { if [ -c /dev/msm_dsps -o -c /dev/sensors ]; then chmod -h 775 /persist/sensors chmod -h 664 /persist/sensors/sensors_settings chown -h system.root /persist/sensors/sensors_settings mkdir -p /data/misc/sensors chmod -h 775 /data/misc/sensors start sensors fi } start_sensors /system/core/rootdir/etc/init.qcom.rc service sensors /system/bin/sensors.qcom class late_start user root group root disabled

6. check sensor registry configure:

sns_regedit_ssi -r

7. check which sensor init success:

sns_dsps_tc0001

8. read sensor data:

sns_cm_test

usage)

-r : rate

-d: duration in secound

-s: Sensor ID

-t data_type

eg to read light sensor data:

# sns_cm_test -r 10 -d 10 -s 40 -t 1

最后

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