| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * ChromeOS EC sensor hub |
| * |
| * Copyright (C) 2016 Google, Inc |
| */ |
| |
| #ifndef __CROS_EC_SENSORS_CORE_H |
| #define __CROS_EC_SENSORS_CORE_H |
| |
| #include <linux/iio/iio.h> |
| #include <linux/irqreturn.h> |
| #include <linux/platform_data/cros_ec_commands.h> |
| #include <linux/platform_data/cros_ec_proto.h> |
| #include <linux/platform_data/cros_ec_sensorhub.h> |
| |
| enum { |
| CROS_EC_SENSOR_X, |
| CROS_EC_SENSOR_Y, |
| CROS_EC_SENSOR_Z, |
| CROS_EC_SENSOR_MAX_AXIS, |
| }; |
| |
| /* EC returns sensor values using signed 16 bit registers */ |
| #define CROS_EC_SENSOR_BITS 16 |
| |
| /* |
| * 4 16 bit channels are allowed. |
| * Good enough for current sensors, they use up to 3 16 bit vectors. |
| */ |
| #define CROS_EC_SAMPLE_SIZE (sizeof(s64) * 2) |
| |
| typedef irqreturn_t (*cros_ec_sensors_capture_t)(int irq, void *p); |
| |
| /** |
| * struct cros_ec_sensors_core_state - state data for EC sensors IIO driver |
| * @ec: cros EC device structure |
| * @cmd_lock: lock used to prevent simultaneous access to the |
| * commands. |
| * @msg: cros EC command structure |
| * @param: motion sensor parameters structure |
| * @resp: motion sensor response structure |
| * @type: type of motion sensor |
| * @loc: location where the motion sensor is placed |
| * @range_updated: True if the range of the sensor has been |
| * updated. |
| * @curr_range: If updated, the current range value. |
| * It will be reapplied at every resume. |
| * @calib: calibration parameters. Note that trigger |
| * captured data will always provide the calibrated |
| * data |
| * @samples: static array to hold data from a single capture. |
| * For each channel we need 2 bytes, except for |
| * the timestamp. The timestamp is always last and |
| * is always 8-byte aligned. |
| * @read_ec_sensors_data: function used for accessing sensors values |
| * @fifo_max_event_count: Size of the EC sensor FIFO |
| * @frequencies: Table of known available frequencies: |
| * 0, Min and Max in mHz |
| */ |
| struct cros_ec_sensors_core_state { |
| struct cros_ec_device *ec; |
| struct mutex cmd_lock; |
| |
| struct cros_ec_command *msg; |
| struct ec_params_motion_sense param; |
| struct ec_response_motion_sense *resp; |
| |
| enum motionsensor_type type; |
| enum motionsensor_location loc; |
| |
| bool range_updated; |
| int curr_range; |
| |
| struct calib_data { |
| s16 offset; |
| u16 scale; |
| } calib[CROS_EC_SENSOR_MAX_AXIS]; |
| s8 sign[CROS_EC_SENSOR_MAX_AXIS]; |
| u8 samples[CROS_EC_SAMPLE_SIZE] __aligned(8); |
| |
| int (*read_ec_sensors_data)(struct iio_dev *indio_dev, |
| unsigned long scan_mask, s16 *data); |
| |
| u32 fifo_max_event_count; |
| int frequencies[6]; |
| }; |
| |
| int cros_ec_sensors_read_lpc(struct iio_dev *indio_dev, unsigned long scan_mask, |
| s16 *data); |
| |
| int cros_ec_sensors_read_cmd(struct iio_dev *indio_dev, unsigned long scan_mask, |
| s16 *data); |
| |
| struct platform_device; |
| int cros_ec_sensors_core_init(struct platform_device *pdev, |
| struct iio_dev *indio_dev, bool physical_device, |
| cros_ec_sensors_capture_t trigger_capture, |
| cros_ec_sensorhub_push_data_cb_t push_data); |
| |
| irqreturn_t cros_ec_sensors_capture(int irq, void *p); |
| int cros_ec_sensors_push_data(struct iio_dev *indio_dev, |
| s16 *data, |
| s64 timestamp); |
| |
| int cros_ec_motion_send_host_cmd(struct cros_ec_sensors_core_state *st, |
| u16 opt_length); |
| |
| int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st, |
| struct iio_chan_spec const *chan, |
| int *val, int *val2, long mask); |
| |
| int cros_ec_sensors_core_read_avail(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, |
| const int **vals, |
| int *type, |
| int *length, |
| long mask); |
| |
| int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st, |
| struct iio_chan_spec const *chan, |
| int val, int val2, long mask); |
| |
| extern const struct dev_pm_ops cros_ec_sensors_pm_ops; |
| |
| /* List of extended channel specification for all sensors. */ |
| extern const struct iio_chan_spec_ext_info cros_ec_sensors_ext_info[]; |
| |
| #endif /* __CROS_EC_SENSORS_CORE_H */ |