/* * 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 #include #include #include /** * 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; s32 logical_minimum; s32 logical_maximum; }; /** * 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. * @start_collection_index: Starting index for a phy type collection * @end_collection_index: Last index for a phy type collection */ struct hid_sensor_hub_device { struct hid_device *hdev; u32 vendor_id; u32 product_id; int start_collection_index; int end_collection_index; }; /** * 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); }; /** * sensor_hub_device_open() - Open hub device * @hsdev: Hub device instance. * * Used to open hid device for sensor hub. */ int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev); /** * sensor_hub_device_clode() - Close hub device * @hsdev: Hub device instance. * * Used to clode hid device for sensor hub. */ void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev); /* 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; atomic_t data_ready; struct iio_trigger *trigger; 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); int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, u32 report_id, int field_index, u32 usage_id); int hid_sensor_format_scale(u32 usage_id, struct hid_sensor_hub_attribute_info *attr_info, int *val0, int *val1); s32 hid_sensor_read_poll_value(struct hid_sensor_common *st); #endif