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Diffstat (limited to 'include/linux/iio/common/st_sensors.h')
| -rw-r--r-- | include/linux/iio/common/st_sensors.h | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h new file mode 100644 index 000000000..c16a9dda3 --- /dev/null +++ b/include/linux/iio/common/st_sensors.h @@ -0,0 +1,323 @@ +/* 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/trigger.h> +#include <linux/bitops.h> +#include <linux/regulator/consumer.h> +#include <linux/regmap.h> + +#include <linux/platform_data/st_sensors_pdata.h> + +/* + * 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(device_type, mask, index, mod, \ + ch2, s, endian, rbits, sbits, addr) \ +{ \ + .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, \ + }, \ +} + +#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 + * @dev: Pointer to instance of struct device (I2C or SPI). + * @trig: The trigger in use by the core driver. + * @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. + * @odr_lock: Local lock for preventing concurrent ODR accesses/changes + */ +struct st_sensor_data { + struct device *dev; + 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; + + struct mutex odr_lock; +}; + +#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); + +void st_sensors_deallocate_trigger(struct iio_dev *indio_dev); +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; +} +static inline void st_sensors_deallocate_trigger(struct iio_dev *indio_dev) +{ + return; +} +#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); + +void st_sensors_power_disable(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); + +#endif /* ST_SENSORS_H */ |