1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/*
* 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);
#endif
|
