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