관리-도구

편집 파일: st_sensors.h

/* 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" /* * Buffer size max case: 2bytes per channel, 3 channels in total + * 8bytes 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 0x07 #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 0x01 #define ST_SENSORS_DEFAULT_POWER_OFF_VALUE 0x00 #define ST_SENSORS_DEFAULT_WAI_ADDRESS 0x0f #define ST_SENSORS_DEFAULT_AXIS_ADDR 0x20 #define ST_SENSORS_DEFAULT_AXIS_MASK 0x07 #define ST_SENSORS_DEFAULT_AXIS_N_BIT 3 #define ST_SENSORS_DEFAULT_STAT_ADDR 0x27 #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. * @vdd: Pointer to sensor's Vdd power supply * @vdd_io: Pointer to sensor's Vdd-IO power supply * @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. */ 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 regulator *vdd; struct regulator *vdd_io; 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; char buffer_data[ST_SENSORS_MAX_BUFFER_SIZE] ____cacheline_aligned; }; #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 */