// SPDX-License-Identifier: GPL-2.0-only /* * Core IIO driver for Bosch BMA400 triaxial acceleration sensor. * * Copyright 2019 Dan Robertson <[email protected]> * * TODO: * - Support for power management * - Support events and interrupts * - Create channel for step count * - Create channel for sensor time */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/cleanup.h> #include <linux/device.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/unaligned.h> #include <linux/iio/iio.h> #include <linux/iio/buffer.h> #include <linux/iio/events.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include "bma400.h" /* * The G-range selection may be one of 2g, 4g, 8, or 16g. The scale may * be selected with the acc_range bits of the ACC_CONFIG1 register. * NB: This buffer is populated in the device init. */ static int bma400_scales[8]; /* * See the ACC_CONFIG1 section of the datasheet. * NB: This buffer is populated in the device init. */ static int bma400_sample_freqs[14]; static const int bma400_osr_range[] = …; static int tap_reset_timeout[BMA400_TAP_TIM_LIST_LEN] = …; static int tap_max2min_time[BMA400_TAP_TIM_LIST_LEN] = …; static int double_tap2_min_delay[BMA400_TAP_TIM_LIST_LEN] = …; /* See the ACC_CONFIG0 section of the datasheet */ enum bma400_power_mode { … }; enum bma400_scan { … }; struct bma400_sample_freq { … }; enum bma400_activity { … }; struct bma400_data { … }; static bool bma400_is_writable_reg(struct device *dev, unsigned int reg) { … } static bool bma400_is_volatile_reg(struct device *dev, unsigned int reg) { … } const struct regmap_config bma400_regmap_config = …; EXPORT_SYMBOL_NS(…); static const struct iio_mount_matrix * bma400_accel_get_mount_matrix(const struct iio_dev *indio_dev, const struct iio_chan_spec *chan) { … } static const struct iio_chan_spec_ext_info bma400_ext_info[] = …; static const struct iio_event_spec bma400_step_detect_event = …; static const struct iio_event_spec bma400_activity_event = …; static const struct iio_event_spec bma400_accel_event[] = …; static int usec_to_tapreg_raw(int usec, const int *time_list) { … } static ssize_t in_accel_gesture_tap_maxtomin_time_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t in_accel_gesture_tap_maxtomin_time_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static IIO_DEVICE_ATTR_RW(in_accel_gesture_tap_maxtomin_time, 0); /* * Tap interrupts works with 200 Hz input data rate and the time based tap * controls are in the terms of data samples so the below calculation is * used to convert the configuration values into seconds. * e.g.: * 60 data samples * 0.005 ms = 0.3 seconds. * 80 data samples * 0.005 ms = 0.4 seconds. */ /* quiet configuration values in seconds */ static IIO_CONST_ATTR(in_accel_gesture_tap_reset_timeout_available, "0.3 0.4 0.5 0.6"); /* tics_th configuration values in seconds */ static IIO_CONST_ATTR(in_accel_gesture_tap_maxtomin_time_available, "0.03 0.045 0.06 0.09"); /* quiet_dt configuration values in seconds */ static IIO_CONST_ATTR(in_accel_gesture_doubletap_tap2_min_delay_available, "0.02 0.04 0.06 0.08"); /* List of sensitivity values available to configure tap interrupts */ static IIO_CONST_ATTR(in_accel_gesture_tap_value_available, "0 1 2 3 4 5 6 7"); static struct attribute *bma400_event_attributes[] = …; static const struct attribute_group bma400_event_attribute_group = …; #define BMA400_ACC_CHANNEL(_index, _axis) … #define BMA400_ACTIVITY_CHANNEL(_chan2) … static const struct iio_chan_spec bma400_channels[] = …; static int bma400_get_temp_reg(struct bma400_data *data, int *val, int *val2) { … } static int bma400_get_accel_reg(struct bma400_data *data, const struct iio_chan_spec *chan, int *val) { … } static void bma400_output_data_rate_from_raw(int raw, unsigned int *val, unsigned int *val2) { … } static int bma400_get_accel_output_data_rate(struct bma400_data *data) { … } static int bma400_set_accel_output_data_rate(struct bma400_data *data, int hz, int uhz) { … } static int bma400_get_accel_oversampling_ratio(struct bma400_data *data) { … } static int bma400_set_accel_oversampling_ratio(struct bma400_data *data, int val) { … } static int bma400_accel_scale_to_raw(struct bma400_data *data, unsigned int val) { … } static int bma400_get_accel_scale(struct bma400_data *data) { … } static int bma400_set_accel_scale(struct bma400_data *data, unsigned int val) { … } static int bma400_get_power_mode(struct bma400_data *data) { … } static int bma400_set_power_mode(struct bma400_data *data, enum bma400_power_mode mode) { … } static int bma400_enable_steps(struct bma400_data *data, int val) { … } static int bma400_get_steps_reg(struct bma400_data *data, int *val) { … } static void bma400_init_tables(void) { … } static void bma400_power_disable(void *data_ptr) { … } static enum iio_modifier bma400_act_to_mod(enum bma400_activity activity) { … } static int bma400_init(struct bma400_data *data) { … } static int bma400_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int bma400_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static int bma400_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int bma400_write_raw_get_fmt(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, long mask) { … } static int bma400_read_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir) { … } static int bma400_steps_event_enable(struct bma400_data *data, int state) { … } static int bma400_activity_event_en(struct bma400_data *data, enum iio_event_direction dir, int state) { … } static int bma400_tap_event_en(struct bma400_data *data, enum iio_event_direction dir, int state) { … } static int bma400_disable_adv_interrupt(struct bma400_data *data) { … } static int bma400_write_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, int state) { … } static int get_gen_config_reg(enum iio_event_direction dir) { … } static int bma400_read_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int *val, int *val2) { … } static int bma400_write_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int val, int val2) { … } static int bma400_data_rdy_trigger_set_state(struct iio_trigger *trig, bool state) { … } static const unsigned long bma400_avail_scan_masks[] = …; static const struct iio_info bma400_info = …; static const struct iio_trigger_ops bma400_trigger_ops = …; static irqreturn_t bma400_trigger_handler(int irq, void *p) { … } static irqreturn_t bma400_interrupt(int irq, void *private) { … } int bma400_probe(struct device *dev, struct regmap *regmap, int irq, const char *name) { … } EXPORT_SYMBOL_NS(…); MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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