include/linux/iio/gyro/itg3200.h

   1 /*
   2  * itg3200.h -- support InvenSense ITG3200
   3  *              Digital 3-Axis Gyroscope driver
   4  *
   5  * Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de>
   6  * Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
   7  * Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #ifndef I2C_ITG3200_H_
  15 #define I2C_ITG3200_H_
  16
  17 #include <linux/iio/iio.h>
  18
  19 /* Register with I2C address (34h) */
  20 #define ITG3200_REG_ADDRESS             0x00
  21
  22 /* Sample rate divider
  23  * Range: 0 to 255
  24  * Default value: 0x00 */
  25 #define ITG3200_REG_SAMPLE_RATE_DIV     0x15
  26
  27 /* Digital low pass filter settings */
  28 #define ITG3200_REG_DLPF                0x16
  29 /* DLPF full scale range */
  30 #define ITG3200_DLPF_FS_SEL_2000        0x18
  31 /* Bandwidth (Hz) and internal sample rate
  32  * (kHz) of DLPF */
  33 #define ITG3200_DLPF_256_8              0x00
  34 #define ITG3200_DLPF_188_1              0x01
  35 #define ITG3200_DLPF_98_1               0x02
  36 #define ITG3200_DLPF_42_1               0x03
  37 #define ITG3200_DLPF_20_1               0x04
  38 #define ITG3200_DLPF_10_1               0x05
  39 #define ITG3200_DLPF_5_1                0x06
  40
  41 #define ITG3200_DLPF_CFG_MASK           0x07
  42
  43 /* Configuration for interrupt operations */
  44 #define ITG3200_REG_IRQ_CONFIG          0x17
  45 /* Logic level */
  46 #define ITG3200_IRQ_ACTIVE_LOW          0x80
  47 #define ITG3200_IRQ_ACTIVE_HIGH         0x00
  48 /* Drive type */
  49 #define ITG3200_IRQ_OPEN_DRAIN          0x40
  50 #define ITG3200_IRQ_PUSH_PULL           0x00
  51 /* Latch mode */
  52 #define ITG3200_IRQ_LATCH_UNTIL_CLEARED 0x20
  53 #define ITG3200_IRQ_LATCH_50US_PULSE    0x00
  54 /* Latch clear method */
  55 #define ITG3200_IRQ_LATCH_CLEAR_ANY     0x10
  56 #define ITG3200_IRQ_LATCH_CLEAR_STATUS  0x00
  57 /* Enable interrupt when device is ready */
  58 #define ITG3200_IRQ_DEVICE_RDY_ENABLE   0x04
  59 /* Enable interrupt when data is available */
  60 #define ITG3200_IRQ_DATA_RDY_ENABLE     0x01
  61
  62 /* Determine the status of ITG-3200 interrupts */
  63 #define ITG3200_REG_IRQ_STATUS          0x1A
  64 /* Status of 'device is ready'-interrupt */
  65 #define ITG3200_IRQ_DEVICE_RDY_STATUS   0x04
  66 /* Status of 'data is available'-interrupt */
  67 #define ITG3200_IRQ_DATA_RDY_STATUS     0x01
  68
  69 /* Sensor registers */
  70 #define ITG3200_REG_TEMP_OUT_H          0x1B
  71 #define ITG3200_REG_TEMP_OUT_L          0x1C
  72 #define ITG3200_REG_GYRO_XOUT_H         0x1D
  73 #define ITG3200_REG_GYRO_XOUT_L         0x1E
  74 #define ITG3200_REG_GYRO_YOUT_H         0x1F
  75 #define ITG3200_REG_GYRO_YOUT_L         0x20
  76 #define ITG3200_REG_GYRO_ZOUT_H         0x21
  77 #define ITG3200_REG_GYRO_ZOUT_L         0x22
  78
  79 /* Power management */
  80 #define ITG3200_REG_POWER_MANAGEMENT    0x3E
  81 /* Reset device and internal registers to the
  82  * power-up-default settings */
  83 #define ITG3200_RESET                   0x80
  84 /* Enable low power sleep mode */
  85 #define ITG3200_SLEEP                   0x40
  86 /* Put according gyroscope in standby mode */
  87 #define ITG3200_STANDBY_GYRO_X          0x20
  88 #define ITG3200_STANDBY_GYRO_Y          0x10
  89 #define ITG3200_STANDBY_GYRO_Z          0x08
  90 /* Determine the device clock source */
  91 #define ITG3200_CLK_INTERNAL            0x00
  92 #define ITG3200_CLK_GYRO_X              0x01
  93 #define ITG3200_CLK_GYRO_Y              0x02
  94 #define ITG3200_CLK_GYRO_Z              0x03
  95 #define ITG3200_CLK_EXT_32K             0x04
  96 #define ITG3200_CLK_EXT_19M             0x05
  97
  98
  99 /**
 100  * struct itg3200 - device instance specific data
 101  * @i2c:    actual i2c_client
 102  * @trig:   data ready trigger from itg3200 pin
 103  **/
 104 struct itg3200 {
 105         struct i2c_client       *i2c;
 106         struct iio_trigger      *trig;
 107 };
 108
 109 enum ITG3200_SCAN_INDEX {
 110         ITG3200_SCAN_TEMP,
 111         ITG3200_SCAN_GYRO_X,
 112         ITG3200_SCAN_GYRO_Y,
 113         ITG3200_SCAN_GYRO_Z,
 114         ITG3200_SCAN_ELEMENTS,
 115 };
 116
 117 int itg3200_write_reg_8(struct iio_dev *indio_dev,
 118                 u8 reg_address, u8 val);
 119
 120 int itg3200_read_reg_8(struct iio_dev *indio_dev,
 121                 u8 reg_address, u8 *val);
 122
 123
 124 #ifdef CONFIG_IIO_BUFFER
 125
 126 void itg3200_remove_trigger(struct iio_dev *indio_dev);
 127 int itg3200_probe_trigger(struct iio_dev *indio_dev);
 128
 129 int itg3200_buffer_configure(struct iio_dev *indio_dev);
 130 void itg3200_buffer_unconfigure(struct iio_dev *indio_dev);
 131
 132 #else /* CONFIG_IIO_BUFFER */
 133
 134 static inline void itg3200_remove_trigger(struct iio_dev *indio_dev)
 135 {
 136 }
 137
 138 static inline int itg3200_probe_trigger(struct iio_dev *indio_dev)
 139 {
 140         return 0;
 141 }
 142
 143 static inline int itg3200_buffer_configure(struct iio_dev *indio_dev)
 144 {
 145         return 0;
 146 }
 147
 148 static inline void itg3200_buffer_unconfigure(struct iio_dev *indio_dev)
 149 {
 150 }
 151
 152 #endif  /* CONFIG_IIO_BUFFER */
 153
 154 #endif /* ITG3200_H_ */