1 /* SPDX-License-Identifier: GPL-2.0-only */ <<
2 /* 1 /*
3 * HID Sensors Driver 2 * HID Sensors Driver
4 * Copyright (c) 2012, Intel Corporation. 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 *
5 */ 18 */
6 #ifndef _HID_SENSORS_HUB_H 19 #ifndef _HID_SENSORS_HUB_H
7 #define _HID_SENSORS_HUB_H 20 #define _HID_SENSORS_HUB_H
8 21
9 #include <linux/hid.h> 22 #include <linux/hid.h>
10 #include <linux/hid-sensor-ids.h> 23 #include <linux/hid-sensor-ids.h>
11 #include <linux/iio/iio.h> 24 #include <linux/iio/iio.h>
12 #include <linux/iio/trigger.h> 25 #include <linux/iio/trigger.h>
13 26
14 /** 27 /**
15 * struct hid_sensor_hub_attribute_info - Attr 28 * struct hid_sensor_hub_attribute_info - Attribute info
16 * @usage_id: Parent usage id of a p 29 * @usage_id: Parent usage id of a physical device.
17 * @attrib_id: Attribute id for this 30 * @attrib_id: Attribute id for this attribute.
18 * @report_id: Report id in which thi 31 * @report_id: Report id in which this information resides.
19 * @index: Field index in the rep 32 * @index: Field index in the report.
20 * @units: Measurment unit for th 33 * @units: Measurment unit for this attribute.
21 * @unit_expo: Exponent used in the d 34 * @unit_expo: Exponent used in the data.
22 * @size: Size in bytes for data 35 * @size: Size in bytes for data size.
23 * @logical_minimum: Logical minimum value 36 * @logical_minimum: Logical minimum value for this attribute.
24 * @logical_maximum: Logical maximum value 37 * @logical_maximum: Logical maximum value for this attribute.
25 */ 38 */
26 struct hid_sensor_hub_attribute_info { 39 struct hid_sensor_hub_attribute_info {
27 u32 usage_id; 40 u32 usage_id;
28 u32 attrib_id; 41 u32 attrib_id;
29 s32 report_id; 42 s32 report_id;
30 s32 index; 43 s32 index;
31 s32 units; 44 s32 units;
32 s32 unit_expo; 45 s32 unit_expo;
33 s32 size; 46 s32 size;
34 s32 logical_minimum; 47 s32 logical_minimum;
35 s32 logical_maximum; 48 s32 logical_maximum;
36 }; 49 };
37 50
38 /** 51 /**
39 * struct sensor_hub_pending - Synchronous rea 52 * struct sensor_hub_pending - Synchronous read pending information
40 * @status: Pending status true/fa 53 * @status: Pending status true/false.
41 * @ready: Completion synchroniza 54 * @ready: Completion synchronization data.
42 * @usage_id: Usage id for physical 55 * @usage_id: Usage id for physical device, E.g. Gyro usage id.
43 * @attr_usage_id: Usage Id of a field, E 56 * @attr_usage_id: Usage Id of a field, E.g. X-AXIS for a gyro.
44 * @raw_size: Response size for a re 57 * @raw_size: Response size for a read request.
45 * @raw_data: Place holder for recei 58 * @raw_data: Place holder for received response.
46 */ 59 */
47 struct sensor_hub_pending { 60 struct sensor_hub_pending {
48 bool status; 61 bool status;
49 struct completion ready; 62 struct completion ready;
50 u32 usage_id; 63 u32 usage_id;
51 u32 attr_usage_id; 64 u32 attr_usage_id;
52 int raw_size; 65 int raw_size;
53 u8 *raw_data; 66 u8 *raw_data;
54 }; 67 };
55 68
56 /** 69 /**
57 * struct hid_sensor_hub_device - Stores the h 70 * struct hid_sensor_hub_device - Stores the hub instance data
58 * @hdev: Stores the hid instanc 71 * @hdev: Stores the hid instance.
59 * @vendor_id: Vendor id of hub devic 72 * @vendor_id: Vendor id of hub device.
60 * @product_id: Product id of hub devi 73 * @product_id: Product id of hub device.
61 * @usage: Usage id for this hub 74 * @usage: Usage id for this hub device instance.
62 * @start_collection_index: Starting index for 75 * @start_collection_index: Starting index for a phy type collection
63 * @end_collection_index: Last index for a phy 76 * @end_collection_index: Last index for a phy type collection
64 * @mutex_ptr: synchronizing mutex po 77 * @mutex_ptr: synchronizing mutex pointer.
65 * @pending: Holds information of p 78 * @pending: Holds information of pending sync read request.
66 */ 79 */
67 struct hid_sensor_hub_device { 80 struct hid_sensor_hub_device {
68 struct hid_device *hdev; 81 struct hid_device *hdev;
69 u32 vendor_id; 82 u32 vendor_id;
70 u32 product_id; 83 u32 product_id;
71 u32 usage; 84 u32 usage;
72 int start_collection_index; 85 int start_collection_index;
73 int end_collection_index; 86 int end_collection_index;
74 struct mutex *mutex_ptr; 87 struct mutex *mutex_ptr;
75 struct sensor_hub_pending pending; 88 struct sensor_hub_pending pending;
76 }; 89 };
77 90
78 /** 91 /**
79 * struct hid_sensor_hub_callbacks - Client ca 92 * struct hid_sensor_hub_callbacks - Client callback functions
80 * @pdev: Platform device instan 93 * @pdev: Platform device instance of the client driver.
81 * @suspend: Suspend callback. 94 * @suspend: Suspend callback.
82 * @resume: Resume callback. 95 * @resume: Resume callback.
83 * @capture_sample: Callback to get a samp 96 * @capture_sample: Callback to get a sample.
84 * @send_event: Send notification to i 97 * @send_event: Send notification to indicate all samples are
85 * captured, process and 98 * captured, process and send event
86 */ 99 */
87 struct hid_sensor_hub_callbacks { 100 struct hid_sensor_hub_callbacks {
88 struct platform_device *pdev; 101 struct platform_device *pdev;
89 int (*suspend)(struct hid_sensor_hub_d 102 int (*suspend)(struct hid_sensor_hub_device *hsdev, void *priv);
90 int (*resume)(struct hid_sensor_hub_de 103 int (*resume)(struct hid_sensor_hub_device *hsdev, void *priv);
91 int (*capture_sample)(struct hid_senso 104 int (*capture_sample)(struct hid_sensor_hub_device *hsdev,
92 u32 usage_id, size_t r 105 u32 usage_id, size_t raw_len, char *raw_data,
93 void *priv); 106 void *priv);
94 int (*send_event)(struct hid_sensor_hu 107 int (*send_event)(struct hid_sensor_hub_device *hsdev, u32 usage_id,
95 void *priv); 108 void *priv);
96 }; 109 };
97 110
98 /** 111 /**
99 * sensor_hub_device_open() - Open hub device 112 * sensor_hub_device_open() - Open hub device
100 * @hsdev: Hub device instance. 113 * @hsdev: Hub device instance.
101 * 114 *
102 * Used to open hid device for sensor hub. 115 * Used to open hid device for sensor hub.
103 */ 116 */
104 int sensor_hub_device_open(struct hid_sensor_h 117 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev);
105 118
106 /** 119 /**
107 * sensor_hub_device_clode() - Close hub device 120 * sensor_hub_device_clode() - Close hub device
108 * @hsdev: Hub device instance. 121 * @hsdev: Hub device instance.
109 * 122 *
110 * Used to clode hid device for sensor hub. 123 * Used to clode hid device for sensor hub.
111 */ 124 */
112 void sensor_hub_device_close(struct hid_sensor 125 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev);
113 126
114 /* Registration functions */ 127 /* Registration functions */
115 128
116 /** 129 /**
117 * sensor_hub_register_callback() - Register cl 130 * sensor_hub_register_callback() - Register client callbacks
118 * @hsdev: Hub device instance. 131 * @hsdev: Hub device instance.
119 * @usage_id: Usage id of the client (E.g. 0 132 * @usage_id: Usage id of the client (E.g. 0x200076 for Gyro).
120 * @usage_callback: Callback function storage 133 * @usage_callback: Callback function storage
121 * 134 *
122 * Used to register callbacks by client process 135 * Used to register callbacks by client processing drivers. Sensor
123 * hub core driver will call these callbacks to 136 * hub core driver will call these callbacks to offload processing
124 * of data streams and notifications. 137 * of data streams and notifications.
125 */ 138 */
126 int sensor_hub_register_callback(struct hid_se 139 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
127 u32 usage_id, 140 u32 usage_id,
128 struct hid_sensor_hub_ 141 struct hid_sensor_hub_callbacks *usage_callback);
129 142
130 /** 143 /**
131 * sensor_hub_remove_callback() - Remove client 144 * sensor_hub_remove_callback() - Remove client callbacks
132 * @hsdev: Hub device instance. 145 * @hsdev: Hub device instance.
133 * @usage_id: Usage id of the client (E.g. 0 146 * @usage_id: Usage id of the client (E.g. 0x200076 for Gyro).
134 * 147 *
135 * If there is a callback registred, this call 148 * If there is a callback registred, this call will remove that
136 * callbacks, so that it will stop data and eve 149 * callbacks, so that it will stop data and event notifications.
137 */ 150 */
138 int sensor_hub_remove_callback(struct hid_sens 151 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
139 u32 usage_id); 152 u32 usage_id);
140 153
141 154
142 /* Hid sensor hub core interfaces */ 155 /* Hid sensor hub core interfaces */
143 156
144 /** 157 /**
145 * sensor_hub_input_get_attribute_info() - Get 158 * sensor_hub_input_get_attribute_info() - Get an attribute information
146 * @hsdev: Hub device instance. 159 * @hsdev: Hub device instance.
147 * @type: Type of this attribute, input/ 160 * @type: Type of this attribute, input/output/feature
148 * @usage_id: Attribute usage id of parent p 161 * @usage_id: Attribute usage id of parent physical device as per spec
149 * @attr_usage_id: Attribute usage id as 162 * @attr_usage_id: Attribute usage id as per spec
150 * @info: return information about attri 163 * @info: return information about attribute after parsing report
151 * 164 *
152 * Parses report and returns the attribute info 165 * Parses report and returns the attribute information such as report id,
153 * field index, units and exponent etc. !! 166 * field index, units and exponet etc.
154 */ 167 */
155 int sensor_hub_input_get_attribute_info(struct 168 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
156 u8 type, 169 u8 type,
157 u32 usage_id, u32 attr 170 u32 usage_id, u32 attr_usage_id,
158 struct hid_sensor_hub_ 171 struct hid_sensor_hub_attribute_info *info);
159 172
160 /** 173 /**
161 * sensor_hub_input_attr_get_raw_value() - Sync 174 * sensor_hub_input_attr_get_raw_value() - Synchronous read request
162 * @hsdev: Hub device instance. 175 * @hsdev: Hub device instance.
163 * @usage_id: Attribute usage id of parent p 176 * @usage_id: Attribute usage id of parent physical device as per spec
164 * @attr_usage_id: Attribute usage id as 177 * @attr_usage_id: Attribute usage id as per spec
165 * @report_id: Report id to look for 178 * @report_id: Report id to look for
166 * @flag: Synchronous or asynchronous read 179 * @flag: Synchronous or asynchronous read
167 * @is_signed: If true then fields < 32 bits 180 * @is_signed: If true then fields < 32 bits will be sign-extended
168 * 181 *
169 * Issues a synchronous or asynchronous read re 182 * Issues a synchronous or asynchronous read request for an input attribute.
170 * Return: data up to 32 bits. !! 183 * Returns data upto 32 bits.
171 */ 184 */
172 185
173 enum sensor_hub_read_flags { 186 enum sensor_hub_read_flags {
174 SENSOR_HUB_SYNC, 187 SENSOR_HUB_SYNC,
175 SENSOR_HUB_ASYNC, 188 SENSOR_HUB_ASYNC,
176 }; 189 };
177 190
178 int sensor_hub_input_attr_get_raw_value(struct 191 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
179 u32 us 192 u32 usage_id,
180 u32 at 193 u32 attr_usage_id, u32 report_id,
181 enum s 194 enum sensor_hub_read_flags flag,
182 bool i 195 bool is_signed
183 ); 196 );
184 197
185 /** 198 /**
186 * sensor_hub_set_feature() - Feature set reque 199 * sensor_hub_set_feature() - Feature set request
187 * @hsdev: Hub device instance. 200 * @hsdev: Hub device instance.
188 * @report_id: Report id to look for 201 * @report_id: Report id to look for
189 * @field_index: Field index inside a report 202 * @field_index: Field index inside a report
190 * @buffer_size: size of the buffer 203 * @buffer_size: size of the buffer
191 * @buffer: buffer to use in the feature s 204 * @buffer: buffer to use in the feature set
192 * 205 *
193 * Used to set a field in feature report. For e 206 * Used to set a field in feature report. For example this can set polling
194 * interval, sensitivity, activate/deactivate s 207 * interval, sensitivity, activate/deactivate state.
195 */ 208 */
196 int sensor_hub_set_feature(struct hid_sensor_h 209 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
197 u32 field_index, in 210 u32 field_index, int buffer_size, void *buffer);
198 211
199 /** 212 /**
200 * sensor_hub_get_feature() - Feature get reque 213 * sensor_hub_get_feature() - Feature get request
201 * @hsdev: Hub device instance. 214 * @hsdev: Hub device instance.
202 * @report_id: Report id to look for 215 * @report_id: Report id to look for
203 * @field_index: Field index inside a report 216 * @field_index: Field index inside a report
204 * @buffer_size: size of the buffer 217 * @buffer_size: size of the buffer
205 * @buffer: buffer to copy output 218 * @buffer: buffer to copy output
206 * 219 *
207 * Used to get a field in feature report. For e 220 * Used to get a field in feature report. For example this can get polling
208 * interval, sensitivity, activate/deactivate s !! 221 * interval, sensitivity, activate/deactivate state. On success it returns
209 * Return: On success, it returns the number of !! 222 * number of bytes copied to buffer. On failure, it returns value < 0.
210 * On failure, it returns value < 0. <<
211 */ 223 */
212 int sensor_hub_get_feature(struct hid_sensor_h 224 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
213 u32 field_index, in 225 u32 field_index, int buffer_size, void *buffer);
214 226
215 /* hid-sensor-attributes */ 227 /* hid-sensor-attributes */
216 228
217 /* Common hid sensor iio structure */ 229 /* Common hid sensor iio structure */
218 struct hid_sensor_common { 230 struct hid_sensor_common {
219 struct hid_sensor_hub_device *hsdev; 231 struct hid_sensor_hub_device *hsdev;
220 struct platform_device *pdev; 232 struct platform_device *pdev;
221 unsigned usage_id; 233 unsigned usage_id;
222 atomic_t data_ready; 234 atomic_t data_ready;
223 atomic_t user_requested_state; 235 atomic_t user_requested_state;
224 atomic_t runtime_pm_enable; 236 atomic_t runtime_pm_enable;
225 int poll_interval; 237 int poll_interval;
226 int raw_hystersis; 238 int raw_hystersis;
227 int latency_ms; 239 int latency_ms;
228 struct iio_trigger *trigger; 240 struct iio_trigger *trigger;
229 int timestamp_ns_scale; 241 int timestamp_ns_scale;
230 struct hid_sensor_hub_attribute_info p 242 struct hid_sensor_hub_attribute_info poll;
231 struct hid_sensor_hub_attribute_info r 243 struct hid_sensor_hub_attribute_info report_state;
232 struct hid_sensor_hub_attribute_info p 244 struct hid_sensor_hub_attribute_info power_state;
233 struct hid_sensor_hub_attribute_info s 245 struct hid_sensor_hub_attribute_info sensitivity;
234 struct hid_sensor_hub_attribute_info s <<
235 struct hid_sensor_hub_attribute_info r 246 struct hid_sensor_hub_attribute_info report_latency;
236 struct work_struct work; 247 struct work_struct work;
237 }; 248 };
238 249
239 /* Convert from hid unit expo to regular expon 250 /* Convert from hid unit expo to regular exponent */
240 static inline int hid_sensor_convert_exponent( 251 static inline int hid_sensor_convert_exponent(int unit_expo)
241 { 252 {
242 if (unit_expo < 0x08) 253 if (unit_expo < 0x08)
243 return unit_expo; 254 return unit_expo;
244 else if (unit_expo <= 0x0f) 255 else if (unit_expo <= 0x0f)
245 return -(0x0f-unit_expo+1); 256 return -(0x0f-unit_expo+1);
246 else 257 else
247 return 0; 258 return 0;
248 } 259 }
249 260
250 int hid_sensor_parse_common_attributes(struct 261 int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev,
251 u32 us 262 u32 usage_id,
252 struct !! 263 struct hid_sensor_common *st);
253 const <<
254 u32 se <<
255 int hid_sensor_write_raw_hyst_value(struct hid 264 int hid_sensor_write_raw_hyst_value(struct hid_sensor_common *st,
256 int va 265 int val1, int val2);
257 int hid_sensor_write_raw_hyst_rel_value(struct <<
258 int va <<
259 int hid_sensor_read_raw_hyst_value(struct hid_ 266 int hid_sensor_read_raw_hyst_value(struct hid_sensor_common *st,
260 int *v 267 int *val1, int *val2);
261 int hid_sensor_read_raw_hyst_rel_value(struct <<
262 int *va <<
263 int hid_sensor_write_samp_freq_value(struct hi 268 int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st,
264 int va 269 int val1, int val2);
265 int hid_sensor_read_samp_freq_value(struct hid 270 int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st,
266 int *v 271 int *val1, int *val2);
267 272
268 int hid_sensor_get_usage_index(struct hid_sens 273 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
269 u32 report_id, 274 u32 report_id, int field_index, u32 usage_id);
270 275
271 int hid_sensor_format_scale(u32 usage_id, 276 int hid_sensor_format_scale(u32 usage_id,
272 struct hid_sensor_ 277 struct hid_sensor_hub_attribute_info *attr_info,
273 int *val0, int *va 278 int *val0, int *val1);
274 279
275 s32 hid_sensor_read_poll_value(struct hid_sens 280 s32 hid_sensor_read_poll_value(struct hid_sensor_common *st);
276 281
277 int64_t hid_sensor_convert_timestamp(struct hi 282 int64_t hid_sensor_convert_timestamp(struct hid_sensor_common *st,
278 int64_t r 283 int64_t raw_value);
279 bool hid_sensor_batch_mode_supported(struct hi 284 bool hid_sensor_batch_mode_supported(struct hid_sensor_common *st);
280 int hid_sensor_set_report_latency(struct hid_s 285 int hid_sensor_set_report_latency(struct hid_sensor_common *st, int latency);
281 int hid_sensor_get_report_latency(struct hid_s 286 int hid_sensor_get_report_latency(struct hid_sensor_common *st);
282 287
283 #endif 288 #endif
284 289
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