155 lines
4.2 KiB
C
155 lines
4.2 KiB
C
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/*
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* itg3200.h -- support InvenSense ITG3200
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* Digital 3-Axis Gyroscope driver
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*
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* Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de>
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* Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
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* Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef I2C_ITG3200_H_
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#define I2C_ITG3200_H_
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#include <linux/iio/iio.h>
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/* Register with I2C address (34h) */
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#define ITG3200_REG_ADDRESS 0x00
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/* Sample rate divider
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* Range: 0 to 255
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* Default value: 0x00 */
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#define ITG3200_REG_SAMPLE_RATE_DIV 0x15
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/* Digital low pass filter settings */
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#define ITG3200_REG_DLPF 0x16
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/* DLPF full scale range */
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#define ITG3200_DLPF_FS_SEL_2000 0x18
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/* Bandwidth (Hz) and internal sample rate
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* (kHz) of DLPF */
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#define ITG3200_DLPF_256_8 0x00
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#define ITG3200_DLPF_188_1 0x01
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#define ITG3200_DLPF_98_1 0x02
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#define ITG3200_DLPF_42_1 0x03
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#define ITG3200_DLPF_20_1 0x04
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#define ITG3200_DLPF_10_1 0x05
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#define ITG3200_DLPF_5_1 0x06
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#define ITG3200_DLPF_CFG_MASK 0x07
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/* Configuration for interrupt operations */
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#define ITG3200_REG_IRQ_CONFIG 0x17
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/* Logic level */
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#define ITG3200_IRQ_ACTIVE_LOW 0x80
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#define ITG3200_IRQ_ACTIVE_HIGH 0x00
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/* Drive type */
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#define ITG3200_IRQ_OPEN_DRAIN 0x40
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#define ITG3200_IRQ_PUSH_PULL 0x00
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/* Latch mode */
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#define ITG3200_IRQ_LATCH_UNTIL_CLEARED 0x20
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#define ITG3200_IRQ_LATCH_50US_PULSE 0x00
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/* Latch clear method */
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#define ITG3200_IRQ_LATCH_CLEAR_ANY 0x10
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#define ITG3200_IRQ_LATCH_CLEAR_STATUS 0x00
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/* Enable interrupt when device is ready */
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#define ITG3200_IRQ_DEVICE_RDY_ENABLE 0x04
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/* Enable interrupt when data is available */
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#define ITG3200_IRQ_DATA_RDY_ENABLE 0x01
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/* Determine the status of ITG-3200 interrupts */
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#define ITG3200_REG_IRQ_STATUS 0x1A
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/* Status of 'device is ready'-interrupt */
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#define ITG3200_IRQ_DEVICE_RDY_STATUS 0x04
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/* Status of 'data is available'-interrupt */
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#define ITG3200_IRQ_DATA_RDY_STATUS 0x01
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/* Sensor registers */
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#define ITG3200_REG_TEMP_OUT_H 0x1B
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#define ITG3200_REG_TEMP_OUT_L 0x1C
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#define ITG3200_REG_GYRO_XOUT_H 0x1D
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#define ITG3200_REG_GYRO_XOUT_L 0x1E
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#define ITG3200_REG_GYRO_YOUT_H 0x1F
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#define ITG3200_REG_GYRO_YOUT_L 0x20
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#define ITG3200_REG_GYRO_ZOUT_H 0x21
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#define ITG3200_REG_GYRO_ZOUT_L 0x22
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/* Power management */
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#define ITG3200_REG_POWER_MANAGEMENT 0x3E
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/* Reset device and internal registers to the
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* power-up-default settings */
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#define ITG3200_RESET 0x80
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/* Enable low power sleep mode */
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#define ITG3200_SLEEP 0x40
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/* Put according gyroscope in standby mode */
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#define ITG3200_STANDBY_GYRO_X 0x20
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#define ITG3200_STANDBY_GYRO_Y 0x10
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#define ITG3200_STANDBY_GYRO_Z 0x08
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/* Determine the device clock source */
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#define ITG3200_CLK_INTERNAL 0x00
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#define ITG3200_CLK_GYRO_X 0x01
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#define ITG3200_CLK_GYRO_Y 0x02
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#define ITG3200_CLK_GYRO_Z 0x03
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#define ITG3200_CLK_EXT_32K 0x04
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#define ITG3200_CLK_EXT_19M 0x05
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/**
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* struct itg3200 - device instance specific data
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* @i2c: actual i2c_client
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* @trig: data ready trigger from itg3200 pin
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**/
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struct itg3200 {
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struct i2c_client *i2c;
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struct iio_trigger *trig;
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};
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enum ITG3200_SCAN_INDEX {
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ITG3200_SCAN_TEMP,
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ITG3200_SCAN_GYRO_X,
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ITG3200_SCAN_GYRO_Y,
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ITG3200_SCAN_GYRO_Z,
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ITG3200_SCAN_ELEMENTS,
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};
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int itg3200_write_reg_8(struct iio_dev *indio_dev,
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u8 reg_address, u8 val);
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int itg3200_read_reg_8(struct iio_dev *indio_dev,
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u8 reg_address, u8 *val);
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#ifdef CONFIG_IIO_BUFFER
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void itg3200_remove_trigger(struct iio_dev *indio_dev);
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int itg3200_probe_trigger(struct iio_dev *indio_dev);
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int itg3200_buffer_configure(struct iio_dev *indio_dev);
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void itg3200_buffer_unconfigure(struct iio_dev *indio_dev);
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#else /* CONFIG_IIO_BUFFER */
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static inline void itg3200_remove_trigger(struct iio_dev *indio_dev)
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{
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}
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static inline int itg3200_probe_trigger(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline int itg3200_buffer_configure(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline void itg3200_buffer_unconfigure(struct iio_dev *indio_dev)
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{
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}
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#endif /* CONFIG_IIO_RING_BUFFER */
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#endif /* ITG3200_H_ */
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