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154 lines
4.2 KiB
154 lines
4.2 KiB
/* |
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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_BUFFER */ |
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#endif /* ITG3200_H_ */
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