1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * HID Sensors Driver |
4 | * Copyright (c) 2012, Intel Corporation. |
5 | */ |
6 | #include <linux/device.h> |
7 | #include <linux/platform_device.h> |
8 | #include <linux/module.h> |
9 | #include <linux/mod_devicetable.h> |
10 | #include <linux/hid-sensor-hub.h> |
11 | #include <linux/iio/iio.h> |
12 | #include <linux/iio/buffer.h> |
13 | #include "../common/hid-sensors/hid-sensor-trigger.h" |
14 | |
15 | enum magn_3d_channel { |
16 | CHANNEL_SCAN_INDEX_X, |
17 | CHANNEL_SCAN_INDEX_Y, |
18 | CHANNEL_SCAN_INDEX_Z, |
19 | CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP, |
20 | CHANNEL_SCAN_INDEX_NORTH_TRUE_TILT_COMP, |
21 | CHANNEL_SCAN_INDEX_NORTH_MAGN, |
22 | CHANNEL_SCAN_INDEX_NORTH_TRUE, |
23 | CHANNEL_SCAN_INDEX_TIMESTAMP, |
24 | MAGN_3D_CHANNEL_MAX, |
25 | }; |
26 | |
27 | struct common_attributes { |
28 | int scale_pre_decml; |
29 | int scale_post_decml; |
30 | int scale_precision; |
31 | int value_offset; |
32 | }; |
33 | |
34 | struct magn_3d_state { |
35 | struct hid_sensor_hub_callbacks callbacks; |
36 | struct hid_sensor_common magn_flux_attributes; |
37 | struct hid_sensor_common rot_attributes; |
38 | struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX]; |
39 | |
40 | /* dynamically sized array to hold sensor values */ |
41 | u32 *iio_vals; |
42 | /* array of pointers to sensor value */ |
43 | u32 *magn_val_addr[MAGN_3D_CHANNEL_MAX]; |
44 | |
45 | struct common_attributes magn_flux_attr; |
46 | struct common_attributes rot_attr; |
47 | s64 timestamp; |
48 | }; |
49 | |
50 | static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = { |
51 | HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS, |
52 | HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS, |
53 | HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS, |
54 | HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH, |
55 | HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH, |
56 | HID_USAGE_SENSOR_ORIENT_MAGN_NORTH, |
57 | HID_USAGE_SENSOR_ORIENT_TRUE_NORTH, |
58 | HID_USAGE_SENSOR_TIME_TIMESTAMP, |
59 | }; |
60 | |
61 | static const u32 magn_3d_sensitivity_addresses[] = { |
62 | HID_USAGE_SENSOR_DATA_ORIENTATION, |
63 | HID_USAGE_SENSOR_ORIENT_MAGN_FLUX, |
64 | }; |
65 | |
66 | /* Channel definitions */ |
67 | static const struct iio_chan_spec magn_3d_channels[] = { |
68 | { |
69 | .type = IIO_MAGN, |
70 | .modified = 1, |
71 | .channel2 = IIO_MOD_X, |
72 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
73 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
74 | BIT(IIO_CHAN_INFO_SCALE) | |
75 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
76 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
77 | }, { |
78 | .type = IIO_MAGN, |
79 | .modified = 1, |
80 | .channel2 = IIO_MOD_Y, |
81 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
82 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
83 | BIT(IIO_CHAN_INFO_SCALE) | |
84 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
85 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
86 | }, { |
87 | .type = IIO_MAGN, |
88 | .modified = 1, |
89 | .channel2 = IIO_MOD_Z, |
90 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
91 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
92 | BIT(IIO_CHAN_INFO_SCALE) | |
93 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
94 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
95 | }, { |
96 | .type = IIO_ROT, |
97 | .modified = 1, |
98 | .channel2 = IIO_MOD_NORTH_MAGN_TILT_COMP, |
99 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
100 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
101 | BIT(IIO_CHAN_INFO_SCALE) | |
102 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
103 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
104 | }, { |
105 | .type = IIO_ROT, |
106 | .modified = 1, |
107 | .channel2 = IIO_MOD_NORTH_TRUE_TILT_COMP, |
108 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
109 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
110 | BIT(IIO_CHAN_INFO_SCALE) | |
111 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
112 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
113 | }, { |
114 | .type = IIO_ROT, |
115 | .modified = 1, |
116 | .channel2 = IIO_MOD_NORTH_MAGN, |
117 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
118 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
119 | BIT(IIO_CHAN_INFO_SCALE) | |
120 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
121 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
122 | }, { |
123 | .type = IIO_ROT, |
124 | .modified = 1, |
125 | .channel2 = IIO_MOD_NORTH_TRUE, |
126 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
127 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
128 | BIT(IIO_CHAN_INFO_SCALE) | |
129 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
130 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
131 | }, |
132 | IIO_CHAN_SOFT_TIMESTAMP(7) |
133 | }; |
134 | |
135 | /* Adjust channel real bits based on report descriptor */ |
136 | static void magn_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels, |
137 | int channel, int size) |
138 | { |
139 | channels[channel].scan_type.sign = 's'; |
140 | /* Real storage bits will change based on the report desc. */ |
141 | channels[channel].scan_type.realbits = size * 8; |
142 | /* Maximum size of a sample to capture is u32 */ |
143 | channels[channel].scan_type.storagebits = sizeof(u32) * 8; |
144 | } |
145 | |
146 | /* Channel read_raw handler */ |
147 | static int magn_3d_read_raw(struct iio_dev *indio_dev, |
148 | struct iio_chan_spec const *chan, |
149 | int *val, int *val2, |
150 | long mask) |
151 | { |
152 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
153 | int report_id = -1; |
154 | u32 address; |
155 | int ret_type; |
156 | s32 min; |
157 | |
158 | *val = 0; |
159 | *val2 = 0; |
160 | switch (mask) { |
161 | case IIO_CHAN_INFO_RAW: |
162 | hid_sensor_power_state(st: &magn_state->magn_flux_attributes, state: true); |
163 | report_id = magn_state->magn[chan->address].report_id; |
164 | min = magn_state->magn[chan->address].logical_minimum; |
165 | address = magn_3d_addresses[chan->address]; |
166 | if (report_id >= 0) |
167 | *val = sensor_hub_input_attr_get_raw_value( |
168 | hsdev: magn_state->magn_flux_attributes.hsdev, |
169 | HID_USAGE_SENSOR_COMPASS_3D, attr_usage_id: address, |
170 | report_id, |
171 | flag: SENSOR_HUB_SYNC, |
172 | is_signed: min < 0); |
173 | else { |
174 | *val = 0; |
175 | hid_sensor_power_state( |
176 | st: &magn_state->magn_flux_attributes, |
177 | state: false); |
178 | return -EINVAL; |
179 | } |
180 | hid_sensor_power_state(st: &magn_state->magn_flux_attributes, |
181 | state: false); |
182 | ret_type = IIO_VAL_INT; |
183 | break; |
184 | case IIO_CHAN_INFO_SCALE: |
185 | switch (chan->type) { |
186 | case IIO_MAGN: |
187 | *val = magn_state->magn_flux_attr.scale_pre_decml; |
188 | *val2 = magn_state->magn_flux_attr.scale_post_decml; |
189 | ret_type = magn_state->magn_flux_attr.scale_precision; |
190 | break; |
191 | case IIO_ROT: |
192 | *val = magn_state->rot_attr.scale_pre_decml; |
193 | *val2 = magn_state->rot_attr.scale_post_decml; |
194 | ret_type = magn_state->rot_attr.scale_precision; |
195 | break; |
196 | default: |
197 | ret_type = -EINVAL; |
198 | } |
199 | break; |
200 | case IIO_CHAN_INFO_OFFSET: |
201 | switch (chan->type) { |
202 | case IIO_MAGN: |
203 | *val = magn_state->magn_flux_attr.value_offset; |
204 | ret_type = IIO_VAL_INT; |
205 | break; |
206 | case IIO_ROT: |
207 | *val = magn_state->rot_attr.value_offset; |
208 | ret_type = IIO_VAL_INT; |
209 | break; |
210 | default: |
211 | ret_type = -EINVAL; |
212 | } |
213 | break; |
214 | case IIO_CHAN_INFO_SAMP_FREQ: |
215 | ret_type = hid_sensor_read_samp_freq_value( |
216 | st: &magn_state->magn_flux_attributes, val1: val, val2); |
217 | break; |
218 | case IIO_CHAN_INFO_HYSTERESIS: |
219 | switch (chan->type) { |
220 | case IIO_MAGN: |
221 | ret_type = hid_sensor_read_raw_hyst_value( |
222 | st: &magn_state->magn_flux_attributes, val1: val, val2); |
223 | break; |
224 | case IIO_ROT: |
225 | ret_type = hid_sensor_read_raw_hyst_value( |
226 | st: &magn_state->rot_attributes, val1: val, val2); |
227 | break; |
228 | default: |
229 | ret_type = -EINVAL; |
230 | } |
231 | break; |
232 | default: |
233 | ret_type = -EINVAL; |
234 | break; |
235 | } |
236 | |
237 | return ret_type; |
238 | } |
239 | |
240 | /* Channel write_raw handler */ |
241 | static int magn_3d_write_raw(struct iio_dev *indio_dev, |
242 | struct iio_chan_spec const *chan, |
243 | int val, |
244 | int val2, |
245 | long mask) |
246 | { |
247 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
248 | int ret = 0; |
249 | |
250 | switch (mask) { |
251 | case IIO_CHAN_INFO_SAMP_FREQ: |
252 | ret = hid_sensor_write_samp_freq_value( |
253 | st: &magn_state->magn_flux_attributes, val1: val, val2); |
254 | break; |
255 | case IIO_CHAN_INFO_HYSTERESIS: |
256 | switch (chan->type) { |
257 | case IIO_MAGN: |
258 | ret = hid_sensor_write_raw_hyst_value( |
259 | st: &magn_state->magn_flux_attributes, val1: val, val2); |
260 | break; |
261 | case IIO_ROT: |
262 | ret = hid_sensor_write_raw_hyst_value( |
263 | st: &magn_state->rot_attributes, val1: val, val2); |
264 | break; |
265 | default: |
266 | ret = -EINVAL; |
267 | } |
268 | break; |
269 | default: |
270 | ret = -EINVAL; |
271 | } |
272 | |
273 | return ret; |
274 | } |
275 | |
276 | static const struct iio_info magn_3d_info = { |
277 | .read_raw = &magn_3d_read_raw, |
278 | .write_raw = &magn_3d_write_raw, |
279 | }; |
280 | |
281 | /* Callback handler to send event after all samples are received and captured */ |
282 | static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev, |
283 | unsigned usage_id, |
284 | void *priv) |
285 | { |
286 | struct iio_dev *indio_dev = platform_get_drvdata(pdev: priv); |
287 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
288 | |
289 | dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n" ); |
290 | if (atomic_read(v: &magn_state->magn_flux_attributes.data_ready)) { |
291 | if (!magn_state->timestamp) |
292 | magn_state->timestamp = iio_get_time_ns(indio_dev); |
293 | |
294 | iio_push_to_buffers_with_timestamp(indio_dev, |
295 | data: magn_state->iio_vals, |
296 | timestamp: magn_state->timestamp); |
297 | magn_state->timestamp = 0; |
298 | } |
299 | |
300 | return 0; |
301 | } |
302 | |
303 | /* Capture samples in local storage */ |
304 | static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev, |
305 | unsigned usage_id, |
306 | size_t raw_len, char *raw_data, |
307 | void *priv) |
308 | { |
309 | struct iio_dev *indio_dev = platform_get_drvdata(pdev: priv); |
310 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
311 | int offset; |
312 | int ret = 0; |
313 | u32 *iio_val = NULL; |
314 | |
315 | switch (usage_id) { |
316 | case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS: |
317 | case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS: |
318 | case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS: |
319 | offset = (usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS) |
320 | + CHANNEL_SCAN_INDEX_X; |
321 | break; |
322 | case HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH: |
323 | case HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH: |
324 | case HID_USAGE_SENSOR_ORIENT_MAGN_NORTH: |
325 | case HID_USAGE_SENSOR_ORIENT_TRUE_NORTH: |
326 | offset = (usage_id - HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH) |
327 | + CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP; |
328 | break; |
329 | case HID_USAGE_SENSOR_TIME_TIMESTAMP: |
330 | magn_state->timestamp = |
331 | hid_sensor_convert_timestamp(st: &magn_state->magn_flux_attributes, |
332 | raw_value: *(s64 *)raw_data); |
333 | return ret; |
334 | default: |
335 | return -EINVAL; |
336 | } |
337 | |
338 | iio_val = magn_state->magn_val_addr[offset]; |
339 | |
340 | if (iio_val != NULL) |
341 | *iio_val = *((u32 *)raw_data); |
342 | else |
343 | ret = -EINVAL; |
344 | |
345 | return ret; |
346 | } |
347 | |
348 | /* Parse report which is specific to an usage id*/ |
349 | static int magn_3d_parse_report(struct platform_device *pdev, |
350 | struct hid_sensor_hub_device *hsdev, |
351 | struct iio_chan_spec **channels, |
352 | int *chan_count, |
353 | unsigned usage_id, |
354 | struct magn_3d_state *st) |
355 | { |
356 | int i; |
357 | int attr_count = 0; |
358 | struct iio_chan_spec *_channels; |
359 | |
360 | /* Scan for each usage attribute supported */ |
361 | for (i = 0; i < MAGN_3D_CHANNEL_MAX; i++) { |
362 | int status; |
363 | u32 address = magn_3d_addresses[i]; |
364 | |
365 | /* Check if usage attribute exists in the sensor hub device */ |
366 | status = sensor_hub_input_get_attribute_info(hsdev, |
367 | type: HID_INPUT_REPORT, |
368 | usage_id, |
369 | attr_usage_id: address, |
370 | info: &(st->magn[i])); |
371 | if (!status) |
372 | attr_count++; |
373 | } |
374 | |
375 | if (attr_count <= 0) { |
376 | dev_err(&pdev->dev, |
377 | "failed to find any supported usage attributes in report\n" ); |
378 | return -EINVAL; |
379 | } |
380 | |
381 | dev_dbg(&pdev->dev, "magn_3d Found %d usage attributes\n" , |
382 | attr_count); |
383 | dev_dbg(&pdev->dev, "magn_3d X: %x:%x Y: %x:%x Z: %x:%x\n" , |
384 | st->magn[0].index, |
385 | st->magn[0].report_id, |
386 | st->magn[1].index, st->magn[1].report_id, |
387 | st->magn[2].index, st->magn[2].report_id); |
388 | |
389 | /* Setup IIO channel array */ |
390 | _channels = devm_kcalloc(dev: &pdev->dev, n: attr_count, |
391 | size: sizeof(struct iio_chan_spec), |
392 | GFP_KERNEL); |
393 | if (!_channels) { |
394 | dev_err(&pdev->dev, |
395 | "failed to allocate space for iio channels\n" ); |
396 | return -ENOMEM; |
397 | } |
398 | |
399 | /* attr_count include timestamp channel, and the iio_vals should be aligned to 8byte */ |
400 | st->iio_vals = devm_kcalloc(dev: &pdev->dev, |
401 | n: ((attr_count + 1) % 2 + (attr_count + 1) / 2) * 2, |
402 | size: sizeof(u32), GFP_KERNEL); |
403 | if (!st->iio_vals) { |
404 | dev_err(&pdev->dev, |
405 | "failed to allocate space for iio values array\n" ); |
406 | return -ENOMEM; |
407 | } |
408 | |
409 | for (i = 0, *chan_count = 0; |
410 | i < MAGN_3D_CHANNEL_MAX && *chan_count < attr_count; |
411 | i++){ |
412 | if (st->magn[i].index >= 0) { |
413 | /* Setup IIO channel struct */ |
414 | (_channels[*chan_count]) = magn_3d_channels[i]; |
415 | (_channels[*chan_count]).scan_index = *chan_count; |
416 | (_channels[*chan_count]).address = i; |
417 | |
418 | if (i != CHANNEL_SCAN_INDEX_TIMESTAMP) { |
419 | /* Set magn_val_addr to iio value address */ |
420 | st->magn_val_addr[i] = &st->iio_vals[*chan_count]; |
421 | magn_3d_adjust_channel_bit_mask(channels: _channels, |
422 | channel: *chan_count, |
423 | size: st->magn[i].size); |
424 | } |
425 | (*chan_count)++; |
426 | } |
427 | } |
428 | |
429 | if (*chan_count <= 0) { |
430 | dev_err(&pdev->dev, |
431 | "failed to find any magnetic channels setup\n" ); |
432 | return -EINVAL; |
433 | } |
434 | |
435 | *channels = _channels; |
436 | |
437 | dev_dbg(&pdev->dev, "magn_3d Setup %d IIO channels\n" , |
438 | *chan_count); |
439 | |
440 | st->magn_flux_attr.scale_precision = hid_sensor_format_scale( |
441 | HID_USAGE_SENSOR_COMPASS_3D, |
442 | attr_info: &st->magn[CHANNEL_SCAN_INDEX_X], |
443 | val0: &st->magn_flux_attr.scale_pre_decml, |
444 | val1: &st->magn_flux_attr.scale_post_decml); |
445 | st->rot_attr.scale_precision |
446 | = hid_sensor_format_scale( |
447 | HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH, |
448 | attr_info: &st->magn[CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP], |
449 | val0: &st->rot_attr.scale_pre_decml, |
450 | val1: &st->rot_attr.scale_post_decml); |
451 | |
452 | if (st->rot_attributes.sensitivity.index < 0) { |
453 | sensor_hub_input_get_attribute_info(hsdev, |
454 | type: HID_FEATURE_REPORT, usage_id, |
455 | HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS | |
456 | HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH, |
457 | info: &st->rot_attributes.sensitivity); |
458 | dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n" , |
459 | st->rot_attributes.sensitivity.index, |
460 | st->rot_attributes.sensitivity.report_id); |
461 | } |
462 | |
463 | return 0; |
464 | } |
465 | |
466 | /* Function to initialize the processing for usage id */ |
467 | static int hid_magn_3d_probe(struct platform_device *pdev) |
468 | { |
469 | int ret = 0; |
470 | static char *name = "magn_3d" ; |
471 | struct iio_dev *indio_dev; |
472 | struct magn_3d_state *magn_state; |
473 | struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; |
474 | struct iio_chan_spec *channels; |
475 | int chan_count = 0; |
476 | |
477 | indio_dev = devm_iio_device_alloc(parent: &pdev->dev, |
478 | sizeof_priv: sizeof(struct magn_3d_state)); |
479 | if (indio_dev == NULL) |
480 | return -ENOMEM; |
481 | |
482 | platform_set_drvdata(pdev, data: indio_dev); |
483 | |
484 | magn_state = iio_priv(indio_dev); |
485 | magn_state->magn_flux_attributes.hsdev = hsdev; |
486 | magn_state->magn_flux_attributes.pdev = pdev; |
487 | |
488 | ret = hid_sensor_parse_common_attributes(hsdev, |
489 | HID_USAGE_SENSOR_COMPASS_3D, |
490 | st: &magn_state->magn_flux_attributes, |
491 | sensitivity_addresses: magn_3d_sensitivity_addresses, |
492 | ARRAY_SIZE(magn_3d_sensitivity_addresses)); |
493 | if (ret) { |
494 | dev_err(&pdev->dev, "failed to setup common attributes\n" ); |
495 | return ret; |
496 | } |
497 | magn_state->rot_attributes = magn_state->magn_flux_attributes; |
498 | /* sensitivity of rot_attribute is not the same as magn_flux_attributes */ |
499 | magn_state->rot_attributes.sensitivity.index = -1; |
500 | |
501 | ret = magn_3d_parse_report(pdev, hsdev, |
502 | channels: &channels, chan_count: &chan_count, |
503 | HID_USAGE_SENSOR_COMPASS_3D, st: magn_state); |
504 | if (ret) { |
505 | dev_err(&pdev->dev, "failed to parse report\n" ); |
506 | return ret; |
507 | } |
508 | |
509 | indio_dev->channels = channels; |
510 | indio_dev->num_channels = chan_count; |
511 | indio_dev->info = &magn_3d_info; |
512 | indio_dev->name = name; |
513 | indio_dev->modes = INDIO_DIRECT_MODE; |
514 | |
515 | atomic_set(v: &magn_state->magn_flux_attributes.data_ready, i: 0); |
516 | |
517 | ret = hid_sensor_setup_trigger(indio_dev, name, |
518 | attrb: &magn_state->magn_flux_attributes); |
519 | if (ret < 0) { |
520 | dev_err(&pdev->dev, "trigger setup failed\n" ); |
521 | return ret; |
522 | } |
523 | |
524 | ret = iio_device_register(indio_dev); |
525 | if (ret) { |
526 | dev_err(&pdev->dev, "device register failed\n" ); |
527 | goto error_remove_trigger; |
528 | } |
529 | |
530 | magn_state->callbacks.send_event = magn_3d_proc_event; |
531 | magn_state->callbacks.capture_sample = magn_3d_capture_sample; |
532 | magn_state->callbacks.pdev = pdev; |
533 | ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D, |
534 | usage_callback: &magn_state->callbacks); |
535 | if (ret < 0) { |
536 | dev_err(&pdev->dev, "callback reg failed\n" ); |
537 | goto error_iio_unreg; |
538 | } |
539 | |
540 | return ret; |
541 | |
542 | error_iio_unreg: |
543 | iio_device_unregister(indio_dev); |
544 | error_remove_trigger: |
545 | hid_sensor_remove_trigger(indio_dev, attrb: &magn_state->magn_flux_attributes); |
546 | return ret; |
547 | } |
548 | |
549 | /* Function to deinitialize the processing for usage id */ |
550 | static void hid_magn_3d_remove(struct platform_device *pdev) |
551 | { |
552 | struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; |
553 | struct iio_dev *indio_dev = platform_get_drvdata(pdev); |
554 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
555 | |
556 | sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D); |
557 | iio_device_unregister(indio_dev); |
558 | hid_sensor_remove_trigger(indio_dev, attrb: &magn_state->magn_flux_attributes); |
559 | } |
560 | |
561 | static const struct platform_device_id hid_magn_3d_ids[] = { |
562 | { |
563 | /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ |
564 | .name = "HID-SENSOR-200083" , |
565 | }, |
566 | { /* sentinel */ } |
567 | }; |
568 | MODULE_DEVICE_TABLE(platform, hid_magn_3d_ids); |
569 | |
570 | static struct platform_driver hid_magn_3d_platform_driver = { |
571 | .id_table = hid_magn_3d_ids, |
572 | .driver = { |
573 | .name = KBUILD_MODNAME, |
574 | .pm = &hid_sensor_pm_ops, |
575 | }, |
576 | .probe = hid_magn_3d_probe, |
577 | .remove_new = hid_magn_3d_remove, |
578 | }; |
579 | module_platform_driver(hid_magn_3d_platform_driver); |
580 | |
581 | MODULE_DESCRIPTION("HID Sensor Magnetometer 3D" ); |
582 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>" ); |
583 | MODULE_LICENSE("GPL" ); |
584 | MODULE_IMPORT_NS(IIO_HID); |
585 | |