Quelle st_sensors.h
Sprache: C
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* STMicroelectronics sensors library driver
*
* Copyright 2012 - 2013 STMicroelectronics Inc .
*
* Denis Ciocca < denis . ciocca @ st . com >
*/
#ifndef ST_SENSORS_H
#define ST_SENSORS_H
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/irqreturn.h>
#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
#include <linux/bitops.h>
#include <linux/regulator/consumer.h>
#include <linux/regmap.h>
#include <linux/platform_data/st_sensors_pdata.h>
#define LSM9DS0_IMU_DEV_NAME "lsm9ds0"
#define LSM303D_IMU_DEV_NAME "lsm303d"
/*
* Buffer size max case : 2 bytes per channel , 3 channels in total +
* 8 bytes timestamp channel ( s64 )
*/
#define ST_SENSORS_MAX_BUFFER_SIZE (ALIGN(2 * 3 , sizeof (s64)) + \
sizeof (s64))
#define ST_SENSORS_ODR_LIST_MAX 10
#define ST_SENSORS_FULLSCALE_AVL_MAX 10
#define ST_SENSORS_NUMBER_ALL_CHANNELS 4
#define ST_SENSORS_ENABLE_ALL_AXIS 0 x07
#define ST_SENSORS_SCAN_X 0
#define ST_SENSORS_SCAN_Y 1
#define ST_SENSORS_SCAN_Z 2
#define ST_SENSORS_DEFAULT_POWER_ON_VALUE 0 x01
#define ST_SENSORS_DEFAULT_POWER_OFF_VALUE 0 x00
#define ST_SENSORS_DEFAULT_WAI_ADDRESS 0 x0f
#define ST_SENSORS_DEFAULT_AXIS_ADDR 0 x20
#define ST_SENSORS_DEFAULT_AXIS_MASK 0 x07
#define ST_SENSORS_DEFAULT_AXIS_N_BIT 3
#define ST_SENSORS_DEFAULT_STAT_ADDR 0 x27
#define ST_SENSORS_MAX_NAME 17
#define ST_SENSORS_MAX_4WAI 8
#define ST_SENSORS_LSM_CHANNELS_EXT(device_type, mask, index, mod, \
ch2, s, endian, rbits, sbits, addr, ext) \
{ \
.type = device_type, \
.modified = mod, \
.info_mask_separate = mask, \
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
.scan_index = index, \
.channel2 = ch2, \
.address = addr, \
.scan_type = { \
.sign = s, \
.realbits = rbits, \
.shift = sbits - rbits, \
.storagebits = sbits, \
.endianness = endian, \
}, \
.ext_info = ext, \
}
#define ST_SENSORS_LSM_CHANNELS(device_type, mask, index, mod, \
ch2, s, endian, rbits, sbits, addr) \
ST_SENSORS_LSM_CHANNELS_EXT(device_type, mask, index, mod, \
ch2, s, endian, rbits, sbits, addr, NULL)
#define ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL() \
IIO_DEV_ATTR_SAMP_FREQ_AVAIL( \
st_sensors_sysfs_sampling_frequency_avail)
#define ST_SENSORS_DEV_ATTR_SCALE_AVAIL(name) \
IIO_DEVICE_ATTR(name, S_IRUGO, \
st_sensors_sysfs_scale_avail, NULL , 0 );
struct st_sensor_odr_avl {
unsigned int hz;
u8 value;
};
struct st_sensor_odr {
u8 addr;
u8 mask;
struct st_sensor_odr_avl odr_avl[ST_SENSORS_ODR_LIST_MAX];
};
struct st_sensor_power {
u8 addr;
u8 mask;
u8 value_off;
u8 value_on;
};
struct st_sensor_axis {
u8 addr;
u8 mask;
};
struct st_sensor_fullscale_avl {
unsigned int num;
u8 value;
unsigned int gain;
unsigned int gain2;
};
struct st_sensor_fullscale {
u8 addr;
u8 mask;
struct st_sensor_fullscale_avl fs_avl[ST_SENSORS_FULLSCALE_AVL_MAX];
};
struct st_sensor_sim {
u8 addr;
u8 value;
};
/**
* struct st_sensor_bdu - ST sensor device block data update
* @ addr : address of the register .
* @ mask : mask to write the block data update flag .
*/
struct st_sensor_bdu {
u8 addr;
u8 mask;
};
/**
* struct st_sensor_das - ST sensor device data alignment selection
* @ addr : address of the register .
* @ mask : mask to write the das flag for left alignment .
*/
struct st_sensor_das {
u8 addr;
u8 mask;
};
/**
* struct st_sensor_int_drdy - ST sensor device drdy line parameters
* @ addr : address of INT drdy register .
* @ mask : mask to enable drdy line .
* @ addr_od : address to enable / disable Open Drain on the INT line .
* @ mask_od : mask to enable / disable Open Drain on the INT line .
*/
struct st_sensor_int_drdy {
u8 addr;
u8 mask;
u8 addr_od;
u8 mask_od;
};
/**
* struct st_sensor_data_ready_irq - ST sensor device data - ready interrupt
* struct int1 - data - ready configuration register for INT1 pin .
* struct int2 - data - ready configuration register for INT2 pin .
* @ addr_ihl : address to enable / disable active low on the INT lines .
* @ mask_ihl : mask to enable / disable active low on the INT lines .
* struct stat_drdy - status register of DRDY ( data ready ) interrupt .
* struct ig1 - represents the Interrupt Generator 1 of sensors .
* @ en_addr : address of the enable ig1 register .
* @ en_mask : mask to write the on / off value for enable .
*/
struct st_sensor_data_ready_irq {
struct st_sensor_int_drdy int1;
struct st_sensor_int_drdy int2;
u8 addr_ihl;
u8 mask_ihl;
struct {
u8 addr;
u8 mask;
} stat_drdy;
struct {
u8 en_addr;
u8 en_mask;
} ig1;
};
/**
* struct st_sensor_settings - ST specific sensor settings
* @ wai : Contents of WhoAmI register .
* @ wai_addr : The address of WhoAmI register .
* @ sensors_supported : List of supported sensors by struct itself .
* @ ch : IIO channels for the sensor .
* @ odr : Output data rate register and ODR list available .
* @ pw : Power register of the sensor .
* @ enable_axis : Enable one or more axis of the sensor .
* @ fs : Full scale register and full scale list available .
* @ bdu : Block data update register .
* @ das : Data Alignment Selection register .
* @ drdy_irq : Data ready register of the sensor .
* @ sim : SPI serial interface mode register of the sensor .
* @ multi_read_bit : Use or not particular bit for [ I2C / SPI ] multi - read .
* @ bootime : samples to discard when sensor passing from power - down to power - up .
*/
struct st_sensor_settings {
u8 wai;
u8 wai_addr;
char sensors_supported[ST_SENSORS_MAX_4WAI][ST_SENSORS_MAX_NAME];
struct iio_chan_spec *ch;
int num_ch;
struct st_sensor_odr odr;
struct st_sensor_power pw;
struct st_sensor_axis enable_axis;
struct st_sensor_fullscale fs;
struct st_sensor_bdu bdu;
struct st_sensor_das das;
struct st_sensor_data_ready_irq drdy_irq;
struct st_sensor_sim sim;
bool multi_read_bit;
unsigned int bootime;
};
/**
* struct st_sensor_data - ST sensor device status
* @ trig : The trigger in use by the core driver .
* @ mount_matrix : The mounting matrix of the sensor .
* @ sensor_settings : Pointer to the specific sensor settings in use .
* @ current_fullscale : Maximum range of measure by the sensor .
* @ regmap : Pointer to specific sensor regmap configuration .
* @ enabled : Status of the sensor ( false - > off , true - > on ) .
* @ odr : Output data rate of the sensor [ Hz ] .
* num_data_channels : Number of data channels used in buffer .
* @ drdy_int_pin : Redirect DRDY on pin 1 ( 1 ) or pin 2 ( 2 ) .
* @ int_pin_open_drain : Set the interrupt / DRDY to open drain .
* @ irq : the IRQ number .
* @ edge_irq : the IRQ triggers on edges and need special handling .
* @ hw_irq_trigger : if we ' re using the hardware interrupt on the sensor .
* @ hw_timestamp : Latest timestamp from the interrupt handler , when in use .
* @ buffer_data : Data used by buffer part .
* @ odr_lock : Local lock for preventing concurrent ODR accesses / changes
*/
struct st_sensor_data {
struct iio_trigger *trig;
struct iio_mount_matrix mount_matrix;
struct st_sensor_settings *sensor_settings;
struct st_sensor_fullscale_avl *current_fullscale;
struct regmap *regmap;
bool enabled;
unsigned int odr;
unsigned int num_data_channels;
u8 drdy_int_pin;
bool int_pin_open_drain;
int irq;
bool edge_irq;
bool hw_irq_trigger;
s64 hw_timestamp;
struct mutex odr_lock;
char buffer_data[ST_SENSORS_MAX_BUFFER_SIZE] __aligned(IIO_DMA_MINALIGN);
};
#ifdef CONFIG_IIO_BUFFER
irqreturn_t st_sensors_trigger_handler(int irq, void *p);
#endif
#ifdef CONFIG_IIO_TRIGGER
int st_sensors_allocate_trigger(struct iio_dev *indio_dev,
const struct iio_trigger_ops *trigger_ops);
int st_sensors_validate_device(struct iio_trigger *trig,
struct iio_dev *indio_dev);
#else
static inline int st_sensors_allocate_trigger(struct iio_dev *indio_dev,
const struct iio_trigger_ops *trigger_ops)
{
return 0 ;
}
#define st_sensors_validate_device NULL
#endif
int st_sensors_init_sensor(struct iio_dev *indio_dev,
struct st_sensors_platform_data *pdata);
int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable);
int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable);
int st_sensors_power_enable(struct iio_dev *indio_dev);
int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev,
unsigned reg, unsigned writeval,
unsigned *readval);
int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr);
int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable);
int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale);
int st_sensors_read_info_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *ch, int *val);
int st_sensors_get_settings_index(const char *name,
const struct st_sensor_settings *list,
const int list_length);
int st_sensors_verify_id(struct iio_dev *indio_dev);
ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev,
struct device_attribute *attr, char *buf);
ssize_t st_sensors_sysfs_scale_avail(struct device *dev,
struct device_attribute *attr, char *buf);
void st_sensors_dev_name_probe(struct device *dev, char *name, int len);
/* Accelerometer */
const struct st_sensor_settings *st_accel_get_settings(const char *name);
int st_accel_common_probe(struct iio_dev *indio_dev);
/* Gyroscope */
const struct st_sensor_settings *st_gyro_get_settings(const char *name);
int st_gyro_common_probe(struct iio_dev *indio_dev);
/* Magnetometer */
const struct st_sensor_settings *st_magn_get_settings(const char *name);
int st_magn_common_probe(struct iio_dev *indio_dev);
/* Pressure */
const struct st_sensor_settings *st_press_get_settings(const char *name);
int st_press_common_probe(struct iio_dev *indio_dev);
#endif /* ST_SENSORS_H */
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¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-01)
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*© Formatika GbR, Deutschland
2026-10-10
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