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srinivas pandruvada401ca242012-09-05 13:56:00 +01001/*
2 * HID Sensors Driver
3 * Copyright (c) 2012, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 */
19#ifndef _HID_SENSORS_HUB_H
20#define _HID_SENSORS_HUB_H
21
22#include <linux/hid.h>
23#include <linux/hid-sensor-ids.h>
Srinivas Pandruvadaec7f68e2013-10-30 22:48:00 +000024#include <linux/iio/iio.h>
25#include <linux/iio/trigger.h>
srinivas pandruvada401ca242012-09-05 13:56:00 +010026
27/**
28 * struct hid_sensor_hub_attribute_info - Attribute info
29 * @usage_id: Parent usage id of a physical device.
30 * @attrib_id: Attribute id for this attribute.
31 * @report_id: Report id in which this information resides.
32 * @index: Field index in the report.
33 * @units: Measurment unit for this attribute.
34 * @unit_expo: Exponent used in the data.
35 * @size: Size in bytes for data size.
Srinivas Pandruvadaf9d904a2015-01-07 10:14:43 -080036 * @logical_minimum: Logical minimum value for this attribute.
37 * @logical_maximum: Logical maximum value for this attribute.
srinivas pandruvada401ca242012-09-05 13:56:00 +010038 */
39struct hid_sensor_hub_attribute_info {
40 u32 usage_id;
41 u32 attrib_id;
42 s32 report_id;
43 s32 index;
44 s32 units;
45 s32 unit_expo;
46 s32 size;
Srinivas Pandruvada9f740ff2013-11-27 22:19:00 +000047 s32 logical_minimum;
48 s32 logical_maximum;
srinivas pandruvada401ca242012-09-05 13:56:00 +010049};
50
51/**
Srinivas Pandruvadae651a1d2015-02-19 15:31:25 -080052 * struct sensor_hub_pending - Synchronous read pending information
53 * @status: Pending status true/false.
54 * @ready: Completion synchronization data.
55 * @usage_id: Usage id for physical device, E.g. Gyro usage id.
56 * @attr_usage_id: Usage Id of a field, E.g. X-AXIS for a gyro.
57 * @raw_size: Response size for a read request.
58 * @raw_data: Place holder for received response.
59 */
60struct sensor_hub_pending {
61 bool status;
62 struct completion ready;
63 u32 usage_id;
64 u32 attr_usage_id;
65 int raw_size;
66 u8 *raw_data;
67};
68
69/**
srinivas pandruvada401ca242012-09-05 13:56:00 +010070 * struct hid_sensor_hub_device - Stores the hub instance data
71 * @hdev: Stores the hid instance.
72 * @vendor_id: Vendor id of hub device.
73 * @product_id: Product id of hub device.
Srinivas Pandruvadae651a1d2015-02-19 15:31:25 -080074 * @usage: Usage id for this hub device instance.
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -080075 * @start_collection_index: Starting index for a phy type collection
76 * @end_collection_index: Last index for a phy type collection
Srinivas Pandruvada2d94e522015-05-07 14:26:34 -070077 * @mutex_ptr: synchronizing mutex pointer.
Srinivas Pandruvadae651a1d2015-02-19 15:31:25 -080078 * @pending: Holds information of pending sync read request.
srinivas pandruvada401ca242012-09-05 13:56:00 +010079 */
80struct hid_sensor_hub_device {
81 struct hid_device *hdev;
82 u32 vendor_id;
83 u32 product_id;
Srinivas Pandruvadae651a1d2015-02-19 15:31:25 -080084 u32 usage;
Srinivas Pandruvadaca2ed122014-01-31 12:04:10 -080085 int start_collection_index;
86 int end_collection_index;
Srinivas Pandruvada2d94e522015-05-07 14:26:34 -070087 struct mutex *mutex_ptr;
Srinivas Pandruvadae651a1d2015-02-19 15:31:25 -080088 struct sensor_hub_pending pending;
srinivas pandruvada401ca242012-09-05 13:56:00 +010089};
90
91/**
92 * struct hid_sensor_hub_callbacks - Client callback functions
93 * @pdev: Platform device instance of the client driver.
94 * @suspend: Suspend callback.
95 * @resume: Resume callback.
96 * @capture_sample: Callback to get a sample.
97 * @send_event: Send notification to indicate all samples are
98 * captured, process and send event
99 */
100struct hid_sensor_hub_callbacks {
101 struct platform_device *pdev;
102 int (*suspend)(struct hid_sensor_hub_device *hsdev, void *priv);
103 int (*resume)(struct hid_sensor_hub_device *hsdev, void *priv);
104 int (*capture_sample)(struct hid_sensor_hub_device *hsdev,
105 u32 usage_id, size_t raw_len, char *raw_data,
106 void *priv);
107 int (*send_event)(struct hid_sensor_hub_device *hsdev, u32 usage_id,
108 void *priv);
109};
110
Srinivas Pandruvada1df3a402013-09-18 18:13:00 +0100111/**
112* sensor_hub_device_open() - Open hub device
113* @hsdev: Hub device instance.
114*
115* Used to open hid device for sensor hub.
116*/
117int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev);
118
119/**
120* sensor_hub_device_clode() - Close hub device
121* @hsdev: Hub device instance.
122*
123* Used to clode hid device for sensor hub.
124*/
125void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev);
126
srinivas pandruvada401ca242012-09-05 13:56:00 +0100127/* Registration functions */
128
129/**
130* sensor_hub_register_callback() - Register client callbacks
131* @hsdev: Hub device instance.
132* @usage_id: Usage id of the client (E.g. 0x200076 for Gyro).
133* @usage_callback: Callback function storage
134*
135* Used to register callbacks by client processing drivers. Sensor
136* hub core driver will call these callbacks to offload processing
137* of data streams and notifications.
138*/
139int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
140 u32 usage_id,
141 struct hid_sensor_hub_callbacks *usage_callback);
142
143/**
144* sensor_hub_remove_callback() - Remove client callbacks
145* @hsdev: Hub device instance.
146* @usage_id: Usage id of the client (E.g. 0x200076 for Gyro).
147*
148* If there is a callback registred, this call will remove that
149* callbacks, so that it will stop data and event notifications.
150*/
151int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
152 u32 usage_id);
153
154
155/* Hid sensor hub core interfaces */
156
157/**
158* sensor_hub_input_get_attribute_info() - Get an attribute information
159* @hsdev: Hub device instance.
160* @type: Type of this attribute, input/output/feature
161* @usage_id: Attribute usage id of parent physical device as per spec
162* @attr_usage_id: Attribute usage id as per spec
163* @info: return information about attribute after parsing report
164*
165* Parses report and returns the attribute information such as report id,
166* field index, units and exponet etc.
167*/
168int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
169 u8 type,
170 u32 usage_id, u32 attr_usage_id,
171 struct hid_sensor_hub_attribute_info *info);
172
173/**
174* sensor_hub_input_attr_get_raw_value() - Synchronous read request
Srinivas Pandruvadaf9d904a2015-01-07 10:14:43 -0800175* @hsdev: Hub device instance.
srinivas pandruvada401ca242012-09-05 13:56:00 +0100176* @usage_id: Attribute usage id of parent physical device as per spec
177* @attr_usage_id: Attribute usage id as per spec
178* @report_id: Report id to look for
Srinivas Pandruvadab3f47372015-02-19 15:33:56 -0800179* @flag: Synchronous or asynchronous read
srinivas pandruvada401ca242012-09-05 13:56:00 +0100180*
Srinivas Pandruvadab3f47372015-02-19 15:33:56 -0800181* Issues a synchronous or asynchronous read request for an input attribute.
182* Returns data upto 32 bits.
srinivas pandruvada401ca242012-09-05 13:56:00 +0100183*/
184
Srinivas Pandruvadab3f47372015-02-19 15:33:56 -0800185enum sensor_hub_read_flags {
186 SENSOR_HUB_SYNC,
187 SENSOR_HUB_ASYNC,
188};
189
srinivas pandruvada401ca242012-09-05 13:56:00 +0100190int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
Srinivas Pandruvadab3f47372015-02-19 15:33:56 -0800191 u32 usage_id,
192 u32 attr_usage_id, u32 report_id,
193 enum sensor_hub_read_flags flag
194);
195
srinivas pandruvada401ca242012-09-05 13:56:00 +0100196/**
197* sensor_hub_set_feature() - Feature set request
Srinivas Pandruvadaf9d904a2015-01-07 10:14:43 -0800198* @hsdev: Hub device instance.
srinivas pandruvada401ca242012-09-05 13:56:00 +0100199* @report_id: Report id to look for
200* @field_index: Field index inside a report
Srinivas Pandruvada3950e032015-02-19 15:35:26 -0800201* @buffer_size: size of the buffer
202* @buffer: buffer to use in the feature set
srinivas pandruvada401ca242012-09-05 13:56:00 +0100203*
204* Used to set a field in feature report. For example this can set polling
205* interval, sensitivity, activate/deactivate state.
206*/
207int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
Srinivas Pandruvada3950e032015-02-19 15:35:26 -0800208 u32 field_index, int buffer_size, void *buffer);
srinivas pandruvada401ca242012-09-05 13:56:00 +0100209
210/**
211* sensor_hub_get_feature() - Feature get request
Srinivas Pandruvadaf9d904a2015-01-07 10:14:43 -0800212* @hsdev: Hub device instance.
srinivas pandruvada401ca242012-09-05 13:56:00 +0100213* @report_id: Report id to look for
214* @field_index: Field index inside a report
Srinivas Pandruvada6adc83f2015-02-19 15:35:25 -0800215* @buffer_size: size of the buffer
216* @buffer: buffer to copy output
srinivas pandruvada401ca242012-09-05 13:56:00 +0100217*
218* Used to get a field in feature report. For example this can get polling
Srinivas Pandruvada6adc83f2015-02-19 15:35:25 -0800219* interval, sensitivity, activate/deactivate state. On success it returns
220* number of bytes copied to buffer. On failure, it returns value < 0.
srinivas pandruvada401ca242012-09-05 13:56:00 +0100221*/
222int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
Srinivas Pandruvada6adc83f2015-02-19 15:35:25 -0800223 u32 field_index, int buffer_size, void *buffer);
Alexander Holler2974cdf2012-12-15 12:45:00 +0000224
225/* hid-sensor-attributes */
226
227/* Common hid sensor iio structure */
Alexander Hollere07c6d12012-12-15 12:45:00 +0000228struct hid_sensor_common {
Alexander Holler2974cdf2012-12-15 12:45:00 +0000229 struct hid_sensor_hub_device *hsdev;
230 struct platform_device *pdev;
231 unsigned usage_id;
Srinivas Pandruvada56ff6be2014-04-19 00:22:00 +0100232 atomic_t data_ready;
Srinivas Pandruvada1e25aa92015-06-01 16:36:27 -0700233 atomic_t user_requested_state;
Srinivas Pandruvadaec7f68e2013-10-30 22:48:00 +0000234 struct iio_trigger *trigger;
Alexander Holler2974cdf2012-12-15 12:45:00 +0000235 struct hid_sensor_hub_attribute_info poll;
236 struct hid_sensor_hub_attribute_info report_state;
237 struct hid_sensor_hub_attribute_info power_state;
238 struct hid_sensor_hub_attribute_info sensitivity;
239};
240
Andy Shevchenko15261f62013-08-14 11:07:08 +0300241/* Convert from hid unit expo to regular exponent */
Alexander Holler2974cdf2012-12-15 12:45:00 +0000242static inline int hid_sensor_convert_exponent(int unit_expo)
243{
244 if (unit_expo < 0x08)
245 return unit_expo;
246 else if (unit_expo <= 0x0f)
247 return -(0x0f-unit_expo+1);
248 else
249 return 0;
250}
251
252int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev,
253 u32 usage_id,
Alexander Hollere07c6d12012-12-15 12:45:00 +0000254 struct hid_sensor_common *st);
255int hid_sensor_write_raw_hyst_value(struct hid_sensor_common *st,
Alexander Holler2974cdf2012-12-15 12:45:00 +0000256 int val1, int val2);
Alexander Hollere07c6d12012-12-15 12:45:00 +0000257int hid_sensor_read_raw_hyst_value(struct hid_sensor_common *st,
Alexander Holler2974cdf2012-12-15 12:45:00 +0000258 int *val1, int *val2);
Alexander Hollere07c6d12012-12-15 12:45:00 +0000259int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
Alexander Holler2974cdf2012-12-15 12:45:00 +0000260 int val1, int val2);
Alexander Hollere07c6d12012-12-15 12:45:00 +0000261int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
Alexander Holler2974cdf2012-12-15 12:45:00 +0000262 int *val1, int *val2);
263
Srinivas Pandruvadae02cee42014-01-23 18:50:21 -0800264int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
265 u32 report_id, int field_index, u32 usage_id);
266
Srinivas Pandruvada5d02edfc2014-04-19 00:22:00 +0100267int hid_sensor_format_scale(u32 usage_id,
268 struct hid_sensor_hub_attribute_info *attr_info,
269 int *val0, int *val1);
270
Srinivas Pandruvada90309242014-04-19 00:22:00 +0100271s32 hid_sensor_read_poll_value(struct hid_sensor_common *st);
272
srinivas pandruvada401ca242012-09-05 13:56:00 +0100273#endif