199 lines
6.4 KiB
C
199 lines
6.4 KiB
C
/*
|
|
* HID Sensors Driver
|
|
* Copyright (c) 2012, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
#ifndef _HID_SENSORS_HUB_H
|
|
#define _HID_SENSORS_HUB_H
|
|
|
|
#include <linux/hid.h>
|
|
#include <linux/hid-sensor-ids.h>
|
|
|
|
/**
|
|
* struct hid_sensor_hub_attribute_info - Attribute info
|
|
* @usage_id: Parent usage id of a physical device.
|
|
* @attrib_id: Attribute id for this attribute.
|
|
* @report_id: Report id in which this information resides.
|
|
* @index: Field index in the report.
|
|
* @units: Measurment unit for this attribute.
|
|
* @unit_expo: Exponent used in the data.
|
|
* @size: Size in bytes for data size.
|
|
*/
|
|
struct hid_sensor_hub_attribute_info {
|
|
u32 usage_id;
|
|
u32 attrib_id;
|
|
s32 report_id;
|
|
s32 index;
|
|
s32 units;
|
|
s32 unit_expo;
|
|
s32 size;
|
|
};
|
|
|
|
/**
|
|
* struct hid_sensor_hub_device - Stores the hub instance data
|
|
* @hdev: Stores the hid instance.
|
|
* @vendor_id: Vendor id of hub device.
|
|
* @product_id: Product id of hub device.
|
|
*/
|
|
struct hid_sensor_hub_device {
|
|
struct hid_device *hdev;
|
|
u32 vendor_id;
|
|
u32 product_id;
|
|
};
|
|
|
|
/**
|
|
* struct hid_sensor_hub_callbacks - Client callback functions
|
|
* @pdev: Platform device instance of the client driver.
|
|
* @suspend: Suspend callback.
|
|
* @resume: Resume callback.
|
|
* @capture_sample: Callback to get a sample.
|
|
* @send_event: Send notification to indicate all samples are
|
|
* captured, process and send event
|
|
*/
|
|
struct hid_sensor_hub_callbacks {
|
|
struct platform_device *pdev;
|
|
int (*suspend)(struct hid_sensor_hub_device *hsdev, void *priv);
|
|
int (*resume)(struct hid_sensor_hub_device *hsdev, void *priv);
|
|
int (*capture_sample)(struct hid_sensor_hub_device *hsdev,
|
|
u32 usage_id, size_t raw_len, char *raw_data,
|
|
void *priv);
|
|
int (*send_event)(struct hid_sensor_hub_device *hsdev, u32 usage_id,
|
|
void *priv);
|
|
};
|
|
|
|
/* Registration functions */
|
|
|
|
/**
|
|
* sensor_hub_register_callback() - Register client callbacks
|
|
* @hsdev: Hub device instance.
|
|
* @usage_id: Usage id of the client (E.g. 0x200076 for Gyro).
|
|
* @usage_callback: Callback function storage
|
|
*
|
|
* Used to register callbacks by client processing drivers. Sensor
|
|
* hub core driver will call these callbacks to offload processing
|
|
* of data streams and notifications.
|
|
*/
|
|
int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
|
|
u32 usage_id,
|
|
struct hid_sensor_hub_callbacks *usage_callback);
|
|
|
|
/**
|
|
* sensor_hub_remove_callback() - Remove client callbacks
|
|
* @hsdev: Hub device instance.
|
|
* @usage_id: Usage id of the client (E.g. 0x200076 for Gyro).
|
|
*
|
|
* If there is a callback registred, this call will remove that
|
|
* callbacks, so that it will stop data and event notifications.
|
|
*/
|
|
int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
|
|
u32 usage_id);
|
|
|
|
|
|
/* Hid sensor hub core interfaces */
|
|
|
|
/**
|
|
* sensor_hub_input_get_attribute_info() - Get an attribute information
|
|
* @hsdev: Hub device instance.
|
|
* @type: Type of this attribute, input/output/feature
|
|
* @usage_id: Attribute usage id of parent physical device as per spec
|
|
* @attr_usage_id: Attribute usage id as per spec
|
|
* @info: return information about attribute after parsing report
|
|
*
|
|
* Parses report and returns the attribute information such as report id,
|
|
* field index, units and exponet etc.
|
|
*/
|
|
int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
|
|
u8 type,
|
|
u32 usage_id, u32 attr_usage_id,
|
|
struct hid_sensor_hub_attribute_info *info);
|
|
|
|
/**
|
|
* sensor_hub_input_attr_get_raw_value() - Synchronous read request
|
|
* @usage_id: Attribute usage id of parent physical device as per spec
|
|
* @attr_usage_id: Attribute usage id as per spec
|
|
* @report_id: Report id to look for
|
|
*
|
|
* Issues a synchronous read request for an input attribute. Returns
|
|
* data upto 32 bits. Since client can get events, so this call should
|
|
* not be used for data paths, this will impact performance.
|
|
*/
|
|
|
|
int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
|
|
u32 usage_id,
|
|
u32 attr_usage_id, u32 report_id);
|
|
/**
|
|
* sensor_hub_set_feature() - Feature set request
|
|
* @report_id: Report id to look for
|
|
* @field_index: Field index inside a report
|
|
* @value: Value to set
|
|
*
|
|
* Used to set a field in feature report. For example this can set polling
|
|
* interval, sensitivity, activate/deactivate state.
|
|
*/
|
|
int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
|
|
u32 field_index, s32 value);
|
|
|
|
/**
|
|
* sensor_hub_get_feature() - Feature get request
|
|
* @report_id: Report id to look for
|
|
* @field_index: Field index inside a report
|
|
* @value: Place holder for return value
|
|
*
|
|
* Used to get a field in feature report. For example this can get polling
|
|
* interval, sensitivity, activate/deactivate state.
|
|
*/
|
|
int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
|
|
u32 field_index, s32 *value);
|
|
|
|
/* hid-sensor-attributes */
|
|
|
|
/* Common hid sensor iio structure */
|
|
struct hid_sensor_common {
|
|
struct hid_sensor_hub_device *hsdev;
|
|
struct platform_device *pdev;
|
|
unsigned usage_id;
|
|
bool data_ready;
|
|
struct hid_sensor_hub_attribute_info poll;
|
|
struct hid_sensor_hub_attribute_info report_state;
|
|
struct hid_sensor_hub_attribute_info power_state;
|
|
struct hid_sensor_hub_attribute_info sensitivity;
|
|
};
|
|
|
|
/* Convert from hid unit expo to regular exponent */
|
|
static inline int hid_sensor_convert_exponent(int unit_expo)
|
|
{
|
|
if (unit_expo < 0x08)
|
|
return unit_expo;
|
|
else if (unit_expo <= 0x0f)
|
|
return -(0x0f-unit_expo+1);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev,
|
|
u32 usage_id,
|
|
struct hid_sensor_common *st);
|
|
int hid_sensor_write_raw_hyst_value(struct hid_sensor_common *st,
|
|
int val1, int val2);
|
|
int hid_sensor_read_raw_hyst_value(struct hid_sensor_common *st,
|
|
int *val1, int *val2);
|
|
int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
|
|
int val1, int val2);
|
|
int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
|
|
int *val1, int *val2);
|
|
|
|
#endif
|