This source file includes following definitions.
- gyro_3d_adjust_channel_bit_mask
- gyro_3d_read_raw
- gyro_3d_write_raw
- hid_sensor_push_data
- gyro_3d_proc_event
- gyro_3d_capture_sample
- gyro_3d_parse_report
- hid_gyro_3d_probe
- hid_gyro_3d_remove
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5
6 #include <linux/device.h>
7 #include <linux/platform_device.h>
8 #include <linux/module.h>
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
11 #include <linux/slab.h>
12 #include <linux/delay.h>
13 #include <linux/hid-sensor-hub.h>
14 #include <linux/iio/iio.h>
15 #include <linux/iio/sysfs.h>
16 #include <linux/iio/buffer.h>
17 #include <linux/iio/trigger_consumer.h>
18 #include <linux/iio/triggered_buffer.h>
19 #include "../common/hid-sensors/hid-sensor-trigger.h"
20
21 enum gyro_3d_channel {
22 CHANNEL_SCAN_INDEX_X,
23 CHANNEL_SCAN_INDEX_Y,
24 CHANNEL_SCAN_INDEX_Z,
25 GYRO_3D_CHANNEL_MAX,
26 };
27
28 struct gyro_3d_state {
29 struct hid_sensor_hub_callbacks callbacks;
30 struct hid_sensor_common common_attributes;
31 struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX];
32 u32 gyro_val[GYRO_3D_CHANNEL_MAX];
33 int scale_pre_decml;
34 int scale_post_decml;
35 int scale_precision;
36 int value_offset;
37 };
38
39 static const u32 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = {
40 HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS,
41 HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS,
42 HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS
43 };
44
45
46 static const struct iio_chan_spec gyro_3d_channels[] = {
47 {
48 .type = IIO_ANGL_VEL,
49 .modified = 1,
50 .channel2 = IIO_MOD_X,
51 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
52 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
53 BIT(IIO_CHAN_INFO_SCALE) |
54 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
55 BIT(IIO_CHAN_INFO_HYSTERESIS),
56 .scan_index = CHANNEL_SCAN_INDEX_X,
57 }, {
58 .type = IIO_ANGL_VEL,
59 .modified = 1,
60 .channel2 = IIO_MOD_Y,
61 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
62 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
63 BIT(IIO_CHAN_INFO_SCALE) |
64 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
65 BIT(IIO_CHAN_INFO_HYSTERESIS),
66 .scan_index = CHANNEL_SCAN_INDEX_Y,
67 }, {
68 .type = IIO_ANGL_VEL,
69 .modified = 1,
70 .channel2 = IIO_MOD_Z,
71 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
72 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
73 BIT(IIO_CHAN_INFO_SCALE) |
74 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
75 BIT(IIO_CHAN_INFO_HYSTERESIS),
76 .scan_index = CHANNEL_SCAN_INDEX_Z,
77 }
78 };
79
80
81 static void gyro_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
82 int channel, int size)
83 {
84 channels[channel].scan_type.sign = 's';
85
86 channels[channel].scan_type.realbits = size * 8;
87
88 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
89 }
90
91
92 static int gyro_3d_read_raw(struct iio_dev *indio_dev,
93 struct iio_chan_spec const *chan,
94 int *val, int *val2,
95 long mask)
96 {
97 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
98 int report_id = -1;
99 u32 address;
100 int ret_type;
101 s32 min;
102
103 *val = 0;
104 *val2 = 0;
105 switch (mask) {
106 case IIO_CHAN_INFO_RAW:
107 hid_sensor_power_state(&gyro_state->common_attributes, true);
108 report_id = gyro_state->gyro[chan->scan_index].report_id;
109 min = gyro_state->gyro[chan->scan_index].logical_minimum;
110 address = gyro_3d_addresses[chan->scan_index];
111 if (report_id >= 0)
112 *val = sensor_hub_input_attr_get_raw_value(
113 gyro_state->common_attributes.hsdev,
114 HID_USAGE_SENSOR_GYRO_3D, address,
115 report_id,
116 SENSOR_HUB_SYNC,
117 min < 0);
118 else {
119 *val = 0;
120 hid_sensor_power_state(&gyro_state->common_attributes,
121 false);
122 return -EINVAL;
123 }
124 hid_sensor_power_state(&gyro_state->common_attributes, false);
125 ret_type = IIO_VAL_INT;
126 break;
127 case IIO_CHAN_INFO_SCALE:
128 *val = gyro_state->scale_pre_decml;
129 *val2 = gyro_state->scale_post_decml;
130 ret_type = gyro_state->scale_precision;
131 break;
132 case IIO_CHAN_INFO_OFFSET:
133 *val = gyro_state->value_offset;
134 ret_type = IIO_VAL_INT;
135 break;
136 case IIO_CHAN_INFO_SAMP_FREQ:
137 ret_type = hid_sensor_read_samp_freq_value(
138 &gyro_state->common_attributes, val, val2);
139 break;
140 case IIO_CHAN_INFO_HYSTERESIS:
141 ret_type = hid_sensor_read_raw_hyst_value(
142 &gyro_state->common_attributes, val, val2);
143 break;
144 default:
145 ret_type = -EINVAL;
146 break;
147 }
148
149 return ret_type;
150 }
151
152
153 static int gyro_3d_write_raw(struct iio_dev *indio_dev,
154 struct iio_chan_spec const *chan,
155 int val,
156 int val2,
157 long mask)
158 {
159 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
160 int ret = 0;
161
162 switch (mask) {
163 case IIO_CHAN_INFO_SAMP_FREQ:
164 ret = hid_sensor_write_samp_freq_value(
165 &gyro_state->common_attributes, val, val2);
166 break;
167 case IIO_CHAN_INFO_HYSTERESIS:
168 ret = hid_sensor_write_raw_hyst_value(
169 &gyro_state->common_attributes, val, val2);
170 break;
171 default:
172 ret = -EINVAL;
173 }
174
175 return ret;
176 }
177
178 static const struct iio_info gyro_3d_info = {
179 .read_raw = &gyro_3d_read_raw,
180 .write_raw = &gyro_3d_write_raw,
181 };
182
183
184 static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
185 int len)
186 {
187 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
188 iio_push_to_buffers(indio_dev, data);
189 }
190
191
192 static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev,
193 unsigned usage_id,
194 void *priv)
195 {
196 struct iio_dev *indio_dev = platform_get_drvdata(priv);
197 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
198
199 dev_dbg(&indio_dev->dev, "gyro_3d_proc_event\n");
200 if (atomic_read(&gyro_state->common_attributes.data_ready))
201 hid_sensor_push_data(indio_dev,
202 gyro_state->gyro_val,
203 sizeof(gyro_state->gyro_val));
204
205 return 0;
206 }
207
208
209 static int gyro_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
210 unsigned usage_id,
211 size_t raw_len, char *raw_data,
212 void *priv)
213 {
214 struct iio_dev *indio_dev = platform_get_drvdata(priv);
215 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
216 int offset;
217 int ret = -EINVAL;
218
219 switch (usage_id) {
220 case HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS:
221 case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS:
222 case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS:
223 offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS;
224 gyro_state->gyro_val[CHANNEL_SCAN_INDEX_X + offset] =
225 *(u32 *)raw_data;
226 ret = 0;
227 break;
228 default:
229 break;
230 }
231
232 return ret;
233 }
234
235
236 static int gyro_3d_parse_report(struct platform_device *pdev,
237 struct hid_sensor_hub_device *hsdev,
238 struct iio_chan_spec *channels,
239 unsigned usage_id,
240 struct gyro_3d_state *st)
241 {
242 int ret;
243 int i;
244
245 for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
246 ret = sensor_hub_input_get_attribute_info(hsdev,
247 HID_INPUT_REPORT,
248 usage_id,
249 HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS + i,
250 &st->gyro[CHANNEL_SCAN_INDEX_X + i]);
251 if (ret < 0)
252 break;
253 gyro_3d_adjust_channel_bit_mask(channels,
254 CHANNEL_SCAN_INDEX_X + i,
255 st->gyro[CHANNEL_SCAN_INDEX_X + i].size);
256 }
257 dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n",
258 st->gyro[0].index,
259 st->gyro[0].report_id,
260 st->gyro[1].index, st->gyro[1].report_id,
261 st->gyro[2].index, st->gyro[2].report_id);
262
263 st->scale_precision = hid_sensor_format_scale(
264 HID_USAGE_SENSOR_GYRO_3D,
265 &st->gyro[CHANNEL_SCAN_INDEX_X],
266 &st->scale_pre_decml, &st->scale_post_decml);
267
268
269 if (st->common_attributes.sensitivity.index < 0) {
270 sensor_hub_input_get_attribute_info(hsdev,
271 HID_FEATURE_REPORT, usage_id,
272 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
273 HID_USAGE_SENSOR_DATA_ANGL_VELOCITY,
274 &st->common_attributes.sensitivity);
275 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
276 st->common_attributes.sensitivity.index,
277 st->common_attributes.sensitivity.report_id);
278 }
279 return ret;
280 }
281
282
283 static int hid_gyro_3d_probe(struct platform_device *pdev)
284 {
285 int ret = 0;
286 static const char *name = "gyro_3d";
287 struct iio_dev *indio_dev;
288 struct gyro_3d_state *gyro_state;
289 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
290
291 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*gyro_state));
292 if (!indio_dev)
293 return -ENOMEM;
294 platform_set_drvdata(pdev, indio_dev);
295
296 gyro_state = iio_priv(indio_dev);
297 gyro_state->common_attributes.hsdev = hsdev;
298 gyro_state->common_attributes.pdev = pdev;
299
300 ret = hid_sensor_parse_common_attributes(hsdev,
301 HID_USAGE_SENSOR_GYRO_3D,
302 &gyro_state->common_attributes);
303 if (ret) {
304 dev_err(&pdev->dev, "failed to setup common attributes\n");
305 return ret;
306 }
307
308 indio_dev->channels = kmemdup(gyro_3d_channels,
309 sizeof(gyro_3d_channels), GFP_KERNEL);
310 if (!indio_dev->channels) {
311 dev_err(&pdev->dev, "failed to duplicate channels\n");
312 return -ENOMEM;
313 }
314
315 ret = gyro_3d_parse_report(pdev, hsdev,
316 (struct iio_chan_spec *)indio_dev->channels,
317 HID_USAGE_SENSOR_GYRO_3D, gyro_state);
318 if (ret) {
319 dev_err(&pdev->dev, "failed to setup attributes\n");
320 goto error_free_dev_mem;
321 }
322
323 indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels);
324 indio_dev->dev.parent = &pdev->dev;
325 indio_dev->info = &gyro_3d_info;
326 indio_dev->name = name;
327 indio_dev->modes = INDIO_DIRECT_MODE;
328
329 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
330 NULL, NULL);
331 if (ret) {
332 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
333 goto error_free_dev_mem;
334 }
335 atomic_set(&gyro_state->common_attributes.data_ready, 0);
336 ret = hid_sensor_setup_trigger(indio_dev, name,
337 &gyro_state->common_attributes);
338 if (ret < 0) {
339 dev_err(&pdev->dev, "trigger setup failed\n");
340 goto error_unreg_buffer_funcs;
341 }
342
343 ret = iio_device_register(indio_dev);
344 if (ret) {
345 dev_err(&pdev->dev, "device register failed\n");
346 goto error_remove_trigger;
347 }
348
349 gyro_state->callbacks.send_event = gyro_3d_proc_event;
350 gyro_state->callbacks.capture_sample = gyro_3d_capture_sample;
351 gyro_state->callbacks.pdev = pdev;
352 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D,
353 &gyro_state->callbacks);
354 if (ret < 0) {
355 dev_err(&pdev->dev, "callback reg failed\n");
356 goto error_iio_unreg;
357 }
358
359 return ret;
360
361 error_iio_unreg:
362 iio_device_unregister(indio_dev);
363 error_remove_trigger:
364 hid_sensor_remove_trigger(&gyro_state->common_attributes);
365 error_unreg_buffer_funcs:
366 iio_triggered_buffer_cleanup(indio_dev);
367 error_free_dev_mem:
368 kfree(indio_dev->channels);
369 return ret;
370 }
371
372
373 static int hid_gyro_3d_remove(struct platform_device *pdev)
374 {
375 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
376 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
377 struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
378
379 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
380 iio_device_unregister(indio_dev);
381 hid_sensor_remove_trigger(&gyro_state->common_attributes);
382 iio_triggered_buffer_cleanup(indio_dev);
383 kfree(indio_dev->channels);
384
385 return 0;
386 }
387
388 static const struct platform_device_id hid_gyro_3d_ids[] = {
389 {
390
391 .name = "HID-SENSOR-200076",
392 },
393 { }
394 };
395 MODULE_DEVICE_TABLE(platform, hid_gyro_3d_ids);
396
397 static struct platform_driver hid_gyro_3d_platform_driver = {
398 .id_table = hid_gyro_3d_ids,
399 .driver = {
400 .name = KBUILD_MODNAME,
401 .pm = &hid_sensor_pm_ops,
402 },
403 .probe = hid_gyro_3d_probe,
404 .remove = hid_gyro_3d_remove,
405 };
406 module_platform_driver(hid_gyro_3d_platform_driver);
407
408 MODULE_DESCRIPTION("HID Sensor Gyroscope 3D");
409 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
410 MODULE_LICENSE("GPL");