118 lines
3.7 KiB
C
118 lines
3.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2020 MediaTek Inc.
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*/
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#ifndef BOSCH_BARO_H
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#define BOSCH_BARO_H
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#include <linux/ioctl.h>
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/* apply low pass filter on output */
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/*#define CONFIG_BMP_LOWPASS*/
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/*#define CONFIG_ID_TEMPERATURE*/
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/*#define CONFIG_I2C_BASIC_FUNCTION*/
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#define BMP_DRIVER_VERSION "V1.3"
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#define BMP_DEV_NAME "bmp280"
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#define C_MAX_FIR_LENGTH (32)
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#define MAX_SENSOR_NAME (32)
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#define BMP_DATA_NUM 1
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#define BMP_PRESSURE 0
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#define BMP_BUFSIZE 128
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/* common definition */
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#define BMP_GET_BITSLICE(regvar, bitname)\
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((regvar & bitname##__MSK) >> bitname##__POS)
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#define BMP_SET_BITSLICE(regvar, bitname, val)\
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((regvar & ~bitname##__MSK) | ((val<<bitname##__POS)&bitname##__MSK))
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#define BMP_CHIP_ID_REG 0xD0
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/*********************************[BMP280]*************************************/
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/* data type */
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#define BMP280_U16_t u16
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#define BMP280_S16_t s16
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#define BMP280_U32_t u32
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#define BMP280_S32_t s32
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#define BMP280_U64_t u64
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#define BMP280_S64_t s64
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/* chip id */
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#define BMP280_CHIP_ID1 0x56
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#define BMP280_CHIP_ID2 0x57
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#define BMP280_CHIP_ID3 0x58
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/* i2c address */
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/* 7-bit addr: 0x76 (SDO connected to GND); 0x77 (SDO connected to VDDIO) */
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#define BMP280_I2C_ADDRESS 0x77
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/* calibration data */
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#define BMP280_CALIBRATION_DATA_START 0x88 /* BMP280_DIG_T1_LSB_REG */
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#define BMP280_CALIBRATION_DATA_LENGTH 24
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#define SHIFT_RIGHT_4_POSITION 4
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#define SHIFT_LEFT_2_POSITION 2
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#define SHIFT_LEFT_4_POSITION 4
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#define SHIFT_LEFT_5_POSITION 5
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#define SHIFT_LEFT_8_POSITION 8
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#define SHIFT_LEFT_12_POSITION 12
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#define SHIFT_LEFT_16_POSITION 16
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/* power mode */
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#define BMP280_SLEEP_MODE 0x00
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#define BMP280_FORCED_MODE 0x01
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#define BMP280_NORMAL_MODE 0x03
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#define BMP280_CTRLMEAS_REG 0xF4 /* Ctrl Measure Register */
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#define BMP280_CTRLMEAS_REG_MODE__POS 0
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#define BMP280_CTRLMEAS_REG_MODE__MSK 0x03
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#define BMP280_CTRLMEAS_REG_MODE__LEN 2
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#define BMP280_CTRLMEAS_REG_MODE__REG BMP280_CTRLMEAS_REG
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/* filter */
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#define BMP280_FILTERCOEFF_OFF 0x00
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#define BMP280_FILTERCOEFF_2 0x01
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#define BMP280_FILTERCOEFF_4 0x02
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#define BMP280_FILTERCOEFF_8 0x03
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#define BMP280_FILTERCOEFF_16 0x04
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#define BMP280_CONFIG_REG 0xF5 /* Configuration Register */
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#define BMP280_CONFIG_REG_FILTER__POS 2
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#define BMP280_CONFIG_REG_FILTER__MSK 0x1C
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#define BMP280_CONFIG_REG_FILTER__LEN 3
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#define BMP280_CONFIG_REG_FILTER__REG BMP280_CONFIG_REG
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/* oversampling */
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#define BMP280_OVERSAMPLING_SKIPPED 0x00
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#define BMP280_OVERSAMPLING_1X 0x01
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#define BMP280_OVERSAMPLING_2X 0x02
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#define BMP280_OVERSAMPLING_4X 0x03
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#define BMP280_OVERSAMPLING_8X 0x04
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#define BMP280_OVERSAMPLING_16X 0x05
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#define BMP280_CTRLMEAS_REG_OSRST__POS 5
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#define BMP280_CTRLMEAS_REG_OSRST__MSK 0xE0
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#define BMP280_CTRLMEAS_REG_OSRST__LEN 3
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#define BMP280_CTRLMEAS_REG_OSRST__REG BMP280_CTRLMEAS_REG
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#define BMP280_CTRLMEAS_REG_OSRSP__POS 2
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#define BMP280_CTRLMEAS_REG_OSRSP__MSK 0x1C
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#define BMP280_CTRLMEAS_REG_OSRSP__LEN 3
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#define BMP280_CTRLMEAS_REG_OSRSP__REG BMP280_CTRLMEAS_REG
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/* data */
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#define BMP280_PRESSURE_MSB_REG 0xF7 /* Pressure MSB Register */
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#define BMP280_TEMPERATURE_MSB_REG 0xFA /* Temperature MSB Reg */
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/* i2c disable switch */
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#define BMP280_I2C_DISABLE_SWITCH 0x87
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#endif/* BOSCH_BARO_H */
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