1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * HID Sensors Driver |
4 | * Copyright (c) 2012, Intel Corporation. |
5 | */ |
6 | |
7 | #include <linux/device.h> |
8 | #include <linux/hid.h> |
9 | #include <linux/module.h> |
10 | #include <linux/slab.h> |
11 | #include <linux/mfd/core.h> |
12 | #include <linux/list.h> |
13 | #include <linux/hid-sensor-ids.h> |
14 | #include <linux/hid-sensor-hub.h> |
15 | #include "hid-ids.h" |
16 | |
17 | #define HID_SENSOR_HUB_ENUM_QUIRK 0x01 |
18 | |
19 | /** |
20 | * struct sensor_hub_data - Hold a instance data for a HID hub device |
21 | * @mutex: Mutex to serialize synchronous request. |
22 | * @lock: Spin lock to protect pending request structure. |
23 | * @dyn_callback_list: Holds callback function |
24 | * @dyn_callback_lock: spin lock to protect callback list |
25 | * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance. |
26 | * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached). |
27 | * @ref_cnt: Number of MFD clients have opened this device |
28 | */ |
29 | struct sensor_hub_data { |
30 | struct mutex mutex; |
31 | spinlock_t lock; |
32 | struct list_head dyn_callback_list; |
33 | spinlock_t dyn_callback_lock; |
34 | struct mfd_cell *hid_sensor_hub_client_devs; |
35 | int hid_sensor_client_cnt; |
36 | int ref_cnt; |
37 | }; |
38 | |
39 | /** |
40 | * struct hid_sensor_hub_callbacks_list - Stores callback list |
41 | * @list: list head. |
42 | * @usage_id: usage id for a physical device. |
43 | * @hsdev: Stored hid instance for current hub device. |
44 | * @usage_callback: Stores registered callback functions. |
45 | * @priv: Private data for a physical device. |
46 | */ |
47 | struct hid_sensor_hub_callbacks_list { |
48 | struct list_head list; |
49 | u32 usage_id; |
50 | struct hid_sensor_hub_device *hsdev; |
51 | struct hid_sensor_hub_callbacks *usage_callback; |
52 | void *priv; |
53 | }; |
54 | |
55 | static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev, |
56 | int dir) |
57 | { |
58 | struct hid_report *report; |
59 | |
60 | list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) { |
61 | if (report->id == id) |
62 | return report; |
63 | } |
64 | hid_warn(hdev, "No report with id 0x%x found\n" , id); |
65 | |
66 | return NULL; |
67 | } |
68 | |
69 | static int sensor_hub_get_physical_device_count(struct hid_device *hdev) |
70 | { |
71 | int i; |
72 | int count = 0; |
73 | |
74 | for (i = 0; i < hdev->maxcollection; ++i) { |
75 | struct hid_collection *collection = &hdev->collection[i]; |
76 | if (collection->type == HID_COLLECTION_PHYSICAL || |
77 | collection->type == HID_COLLECTION_APPLICATION) |
78 | ++count; |
79 | } |
80 | |
81 | return count; |
82 | } |
83 | |
84 | static void sensor_hub_fill_attr_info( |
85 | struct hid_sensor_hub_attribute_info *info, |
86 | s32 index, s32 report_id, struct hid_field *field) |
87 | { |
88 | info->index = index; |
89 | info->report_id = report_id; |
90 | info->units = field->unit; |
91 | info->unit_expo = field->unit_exponent; |
92 | info->size = (field->report_size * field->report_count)/8; |
93 | info->logical_minimum = field->logical_minimum; |
94 | info->logical_maximum = field->logical_maximum; |
95 | } |
96 | |
97 | static struct hid_sensor_hub_callbacks *sensor_hub_get_callback( |
98 | struct hid_device *hdev, |
99 | u32 usage_id, |
100 | int collection_index, |
101 | struct hid_sensor_hub_device **hsdev, |
102 | void **priv) |
103 | { |
104 | struct hid_sensor_hub_callbacks_list *callback; |
105 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
106 | unsigned long flags; |
107 | |
108 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
109 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
110 | if ((callback->usage_id == usage_id || |
111 | callback->usage_id == HID_USAGE_SENSOR_COLLECTION) && |
112 | (collection_index >= |
113 | callback->hsdev->start_collection_index) && |
114 | (collection_index < |
115 | callback->hsdev->end_collection_index)) { |
116 | *priv = callback->priv; |
117 | *hsdev = callback->hsdev; |
118 | spin_unlock_irqrestore(lock: &pdata->dyn_callback_lock, |
119 | flags); |
120 | return callback->usage_callback; |
121 | } |
122 | spin_unlock_irqrestore(lock: &pdata->dyn_callback_lock, flags); |
123 | |
124 | return NULL; |
125 | } |
126 | |
127 | int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, |
128 | u32 usage_id, |
129 | struct hid_sensor_hub_callbacks *usage_callback) |
130 | { |
131 | struct hid_sensor_hub_callbacks_list *callback; |
132 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev: hsdev->hdev); |
133 | unsigned long flags; |
134 | |
135 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
136 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
137 | if (callback->usage_id == usage_id && |
138 | callback->hsdev == hsdev) { |
139 | spin_unlock_irqrestore(lock: &pdata->dyn_callback_lock, flags); |
140 | return -EINVAL; |
141 | } |
142 | callback = kzalloc(size: sizeof(*callback), GFP_ATOMIC); |
143 | if (!callback) { |
144 | spin_unlock_irqrestore(lock: &pdata->dyn_callback_lock, flags); |
145 | return -ENOMEM; |
146 | } |
147 | callback->hsdev = hsdev; |
148 | callback->usage_callback = usage_callback; |
149 | callback->usage_id = usage_id; |
150 | callback->priv = NULL; |
151 | /* |
152 | * If there is a handler registered for the collection type, then |
153 | * it will handle all reports for sensors in this collection. If |
154 | * there is also an individual sensor handler registration, then |
155 | * we want to make sure that the reports are directed to collection |
156 | * handler, as this may be a fusion sensor. So add collection handlers |
157 | * to the beginning of the list, so that they are matched first. |
158 | */ |
159 | if (usage_id == HID_USAGE_SENSOR_COLLECTION) |
160 | list_add(new: &callback->list, head: &pdata->dyn_callback_list); |
161 | else |
162 | list_add_tail(new: &callback->list, head: &pdata->dyn_callback_list); |
163 | spin_unlock_irqrestore(lock: &pdata->dyn_callback_lock, flags); |
164 | |
165 | return 0; |
166 | } |
167 | EXPORT_SYMBOL_GPL(sensor_hub_register_callback); |
168 | |
169 | int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, |
170 | u32 usage_id) |
171 | { |
172 | struct hid_sensor_hub_callbacks_list *callback; |
173 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev: hsdev->hdev); |
174 | unsigned long flags; |
175 | |
176 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
177 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
178 | if (callback->usage_id == usage_id && |
179 | callback->hsdev == hsdev) { |
180 | list_del(entry: &callback->list); |
181 | kfree(objp: callback); |
182 | break; |
183 | } |
184 | spin_unlock_irqrestore(lock: &pdata->dyn_callback_lock, flags); |
185 | |
186 | return 0; |
187 | } |
188 | EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); |
189 | |
190 | int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, |
191 | u32 field_index, int buffer_size, void *buffer) |
192 | { |
193 | struct hid_report *report; |
194 | struct sensor_hub_data *data = hid_get_drvdata(hdev: hsdev->hdev); |
195 | __s32 *buf32 = buffer; |
196 | int i = 0; |
197 | int remaining_bytes; |
198 | __s32 value; |
199 | int ret = 0; |
200 | |
201 | mutex_lock(&data->mutex); |
202 | report = sensor_hub_report(id: report_id, hdev: hsdev->hdev, dir: HID_FEATURE_REPORT); |
203 | if (!report || (field_index >= report->maxfield)) { |
204 | ret = -EINVAL; |
205 | goto done_proc; |
206 | } |
207 | |
208 | remaining_bytes = buffer_size % sizeof(__s32); |
209 | buffer_size = buffer_size / sizeof(__s32); |
210 | if (buffer_size) { |
211 | for (i = 0; i < buffer_size; ++i) { |
212 | ret = hid_set_field(report->field[field_index], i, |
213 | (__force __s32)cpu_to_le32(*buf32)); |
214 | if (ret) |
215 | goto done_proc; |
216 | |
217 | ++buf32; |
218 | } |
219 | } |
220 | if (remaining_bytes) { |
221 | value = 0; |
222 | memcpy(&value, (u8 *)buf32, remaining_bytes); |
223 | ret = hid_set_field(report->field[field_index], i, |
224 | (__force __s32)cpu_to_le32(value)); |
225 | if (ret) |
226 | goto done_proc; |
227 | } |
228 | hid_hw_request(hdev: hsdev->hdev, report, reqtype: HID_REQ_SET_REPORT); |
229 | hid_hw_wait(hdev: hsdev->hdev); |
230 | |
231 | done_proc: |
232 | mutex_unlock(lock: &data->mutex); |
233 | |
234 | return ret; |
235 | } |
236 | EXPORT_SYMBOL_GPL(sensor_hub_set_feature); |
237 | |
238 | int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, |
239 | u32 field_index, int buffer_size, void *buffer) |
240 | { |
241 | struct hid_report *report; |
242 | struct sensor_hub_data *data = hid_get_drvdata(hdev: hsdev->hdev); |
243 | int report_size; |
244 | int ret = 0; |
245 | u8 *val_ptr; |
246 | int buffer_index = 0; |
247 | int i; |
248 | |
249 | memset(buffer, 0, buffer_size); |
250 | |
251 | mutex_lock(&data->mutex); |
252 | report = sensor_hub_report(id: report_id, hdev: hsdev->hdev, dir: HID_FEATURE_REPORT); |
253 | if (!report || (field_index >= report->maxfield) || |
254 | report->field[field_index]->report_count < 1) { |
255 | ret = -EINVAL; |
256 | goto done_proc; |
257 | } |
258 | hid_hw_request(hdev: hsdev->hdev, report, reqtype: HID_REQ_GET_REPORT); |
259 | hid_hw_wait(hdev: hsdev->hdev); |
260 | |
261 | /* calculate number of bytes required to read this field */ |
262 | report_size = DIV_ROUND_UP(report->field[field_index]->report_size, |
263 | 8) * |
264 | report->field[field_index]->report_count; |
265 | if (!report_size) { |
266 | ret = -EINVAL; |
267 | goto done_proc; |
268 | } |
269 | ret = min(report_size, buffer_size); |
270 | |
271 | val_ptr = (u8 *)report->field[field_index]->value; |
272 | for (i = 0; i < report->field[field_index]->report_count; ++i) { |
273 | if (buffer_index >= ret) |
274 | break; |
275 | |
276 | memcpy(&((u8 *)buffer)[buffer_index], val_ptr, |
277 | report->field[field_index]->report_size / 8); |
278 | val_ptr += sizeof(__s32); |
279 | buffer_index += (report->field[field_index]->report_size / 8); |
280 | } |
281 | |
282 | done_proc: |
283 | mutex_unlock(lock: &data->mutex); |
284 | |
285 | return ret; |
286 | } |
287 | EXPORT_SYMBOL_GPL(sensor_hub_get_feature); |
288 | |
289 | |
290 | int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, |
291 | u32 usage_id, |
292 | u32 attr_usage_id, u32 report_id, |
293 | enum sensor_hub_read_flags flag, |
294 | bool is_signed) |
295 | { |
296 | struct sensor_hub_data *data = hid_get_drvdata(hdev: hsdev->hdev); |
297 | unsigned long flags; |
298 | struct hid_report *report; |
299 | int ret_val = 0; |
300 | |
301 | report = sensor_hub_report(id: report_id, hdev: hsdev->hdev, |
302 | dir: HID_INPUT_REPORT); |
303 | if (!report) |
304 | return -EINVAL; |
305 | |
306 | mutex_lock(hsdev->mutex_ptr); |
307 | if (flag == SENSOR_HUB_SYNC) { |
308 | memset(&hsdev->pending, 0, sizeof(hsdev->pending)); |
309 | init_completion(x: &hsdev->pending.ready); |
310 | hsdev->pending.usage_id = usage_id; |
311 | hsdev->pending.attr_usage_id = attr_usage_id; |
312 | hsdev->pending.raw_size = 0; |
313 | |
314 | spin_lock_irqsave(&data->lock, flags); |
315 | hsdev->pending.status = true; |
316 | spin_unlock_irqrestore(lock: &data->lock, flags); |
317 | } |
318 | mutex_lock(&data->mutex); |
319 | hid_hw_request(hdev: hsdev->hdev, report, reqtype: HID_REQ_GET_REPORT); |
320 | mutex_unlock(lock: &data->mutex); |
321 | if (flag == SENSOR_HUB_SYNC) { |
322 | wait_for_completion_interruptible_timeout( |
323 | x: &hsdev->pending.ready, HZ*5); |
324 | switch (hsdev->pending.raw_size) { |
325 | case 1: |
326 | if (is_signed) |
327 | ret_val = *(s8 *)hsdev->pending.raw_data; |
328 | else |
329 | ret_val = *(u8 *)hsdev->pending.raw_data; |
330 | break; |
331 | case 2: |
332 | if (is_signed) |
333 | ret_val = *(s16 *)hsdev->pending.raw_data; |
334 | else |
335 | ret_val = *(u16 *)hsdev->pending.raw_data; |
336 | break; |
337 | case 4: |
338 | ret_val = *(u32 *)hsdev->pending.raw_data; |
339 | break; |
340 | default: |
341 | ret_val = 0; |
342 | } |
343 | kfree(objp: hsdev->pending.raw_data); |
344 | hsdev->pending.status = false; |
345 | } |
346 | mutex_unlock(lock: hsdev->mutex_ptr); |
347 | |
348 | return ret_val; |
349 | } |
350 | EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); |
351 | |
352 | int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, |
353 | u32 report_id, int field_index, u32 usage_id) |
354 | { |
355 | struct hid_report *report; |
356 | struct hid_field *field; |
357 | int i; |
358 | |
359 | report = sensor_hub_report(id: report_id, hdev: hsdev->hdev, dir: HID_FEATURE_REPORT); |
360 | if (!report || (field_index >= report->maxfield)) |
361 | goto done_proc; |
362 | |
363 | field = report->field[field_index]; |
364 | for (i = 0; i < field->maxusage; ++i) { |
365 | if (field->usage[i].hid == usage_id) |
366 | return field->usage[i].usage_index; |
367 | } |
368 | |
369 | done_proc: |
370 | return -EINVAL; |
371 | } |
372 | EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); |
373 | |
374 | int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, |
375 | u8 type, |
376 | u32 usage_id, |
377 | u32 attr_usage_id, |
378 | struct hid_sensor_hub_attribute_info *info) |
379 | { |
380 | int ret = -1; |
381 | int i; |
382 | struct hid_report *report; |
383 | struct hid_field *field; |
384 | struct hid_report_enum *report_enum; |
385 | struct hid_device *hdev = hsdev->hdev; |
386 | |
387 | /* Initialize with defaults */ |
388 | info->usage_id = usage_id; |
389 | info->attrib_id = attr_usage_id; |
390 | info->report_id = -1; |
391 | info->index = -1; |
392 | info->units = -1; |
393 | info->unit_expo = -1; |
394 | |
395 | report_enum = &hdev->report_enum[type]; |
396 | list_for_each_entry(report, &report_enum->report_list, list) { |
397 | for (i = 0; i < report->maxfield; ++i) { |
398 | field = report->field[i]; |
399 | if (field->maxusage) { |
400 | if ((field->physical == usage_id || |
401 | field->application == usage_id) && |
402 | (field->logical == attr_usage_id || |
403 | field->usage[0].hid == |
404 | attr_usage_id) && |
405 | (field->usage[0].collection_index >= |
406 | hsdev->start_collection_index) && |
407 | (field->usage[0].collection_index < |
408 | hsdev->end_collection_index)) { |
409 | |
410 | sensor_hub_fill_attr_info(info, index: i, |
411 | report_id: report->id, |
412 | field); |
413 | ret = 0; |
414 | break; |
415 | } |
416 | } |
417 | } |
418 | |
419 | } |
420 | |
421 | return ret; |
422 | } |
423 | EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); |
424 | |
425 | #ifdef CONFIG_PM |
426 | static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) |
427 | { |
428 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
429 | struct hid_sensor_hub_callbacks_list *callback; |
430 | unsigned long flags; |
431 | |
432 | hid_dbg(hdev, " sensor_hub_suspend\n" ); |
433 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
434 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) { |
435 | if (callback->usage_callback->suspend) |
436 | callback->usage_callback->suspend( |
437 | callback->hsdev, callback->priv); |
438 | } |
439 | spin_unlock_irqrestore(lock: &pdata->dyn_callback_lock, flags); |
440 | |
441 | return 0; |
442 | } |
443 | |
444 | static int sensor_hub_resume(struct hid_device *hdev) |
445 | { |
446 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
447 | struct hid_sensor_hub_callbacks_list *callback; |
448 | unsigned long flags; |
449 | |
450 | hid_dbg(hdev, " sensor_hub_resume\n" ); |
451 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
452 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) { |
453 | if (callback->usage_callback->resume) |
454 | callback->usage_callback->resume( |
455 | callback->hsdev, callback->priv); |
456 | } |
457 | spin_unlock_irqrestore(lock: &pdata->dyn_callback_lock, flags); |
458 | |
459 | return 0; |
460 | } |
461 | |
462 | static int sensor_hub_reset_resume(struct hid_device *hdev) |
463 | { |
464 | return 0; |
465 | } |
466 | #endif |
467 | |
468 | /* |
469 | * Handle raw report as sent by device |
470 | */ |
471 | static int sensor_hub_raw_event(struct hid_device *hdev, |
472 | struct hid_report *report, u8 *raw_data, int size) |
473 | { |
474 | int i; |
475 | u8 *ptr; |
476 | int sz; |
477 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
478 | unsigned long flags; |
479 | struct hid_sensor_hub_callbacks *callback = NULL; |
480 | struct hid_collection *collection = NULL; |
481 | void *priv = NULL; |
482 | struct hid_sensor_hub_device *hsdev = NULL; |
483 | |
484 | hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n" , |
485 | report->id, size, report->type); |
486 | hid_dbg(hdev, "maxfield:%d\n" , report->maxfield); |
487 | if (report->type != HID_INPUT_REPORT) |
488 | return 1; |
489 | |
490 | ptr = raw_data; |
491 | if (report->id) |
492 | ptr++; /* Skip report id */ |
493 | |
494 | spin_lock_irqsave(&pdata->lock, flags); |
495 | |
496 | for (i = 0; i < report->maxfield; ++i) { |
497 | hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n" , |
498 | i, report->field[i]->usage->collection_index, |
499 | report->field[i]->usage->hid, |
500 | (report->field[i]->report_size * |
501 | report->field[i]->report_count)/8); |
502 | sz = (report->field[i]->report_size * |
503 | report->field[i]->report_count)/8; |
504 | collection = &hdev->collection[ |
505 | report->field[i]->usage->collection_index]; |
506 | hid_dbg(hdev, "collection->usage %x\n" , |
507 | collection->usage); |
508 | |
509 | callback = sensor_hub_get_callback(hdev, |
510 | usage_id: report->field[i]->physical ? report->field[i]->physical : |
511 | report->field[i]->application, |
512 | collection_index: report->field[i]->usage[0].collection_index, |
513 | hsdev: &hsdev, priv: &priv); |
514 | if (!callback) { |
515 | ptr += sz; |
516 | continue; |
517 | } |
518 | if (hsdev->pending.status && (hsdev->pending.attr_usage_id == |
519 | report->field[i]->usage->hid || |
520 | hsdev->pending.attr_usage_id == |
521 | report->field[i]->logical)) { |
522 | hid_dbg(hdev, "data was pending ...\n" ); |
523 | hsdev->pending.raw_data = kmemdup(p: ptr, size: sz, GFP_ATOMIC); |
524 | if (hsdev->pending.raw_data) |
525 | hsdev->pending.raw_size = sz; |
526 | else |
527 | hsdev->pending.raw_size = 0; |
528 | complete(&hsdev->pending.ready); |
529 | } |
530 | if (callback->capture_sample) { |
531 | if (report->field[i]->logical) |
532 | callback->capture_sample(hsdev, |
533 | report->field[i]->logical, sz, ptr, |
534 | callback->pdev); |
535 | else |
536 | callback->capture_sample(hsdev, |
537 | report->field[i]->usage->hid, sz, ptr, |
538 | callback->pdev); |
539 | } |
540 | ptr += sz; |
541 | } |
542 | if (callback && collection && callback->send_event) |
543 | callback->send_event(hsdev, collection->usage, |
544 | callback->pdev); |
545 | spin_unlock_irqrestore(lock: &pdata->lock, flags); |
546 | |
547 | return 1; |
548 | } |
549 | |
550 | int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) |
551 | { |
552 | int ret = 0; |
553 | struct sensor_hub_data *data = hid_get_drvdata(hdev: hsdev->hdev); |
554 | |
555 | mutex_lock(&data->mutex); |
556 | if (!data->ref_cnt) { |
557 | ret = hid_hw_open(hdev: hsdev->hdev); |
558 | if (ret) { |
559 | hid_err(hsdev->hdev, "failed to open hid device\n" ); |
560 | mutex_unlock(lock: &data->mutex); |
561 | return ret; |
562 | } |
563 | } |
564 | data->ref_cnt++; |
565 | mutex_unlock(lock: &data->mutex); |
566 | |
567 | return ret; |
568 | } |
569 | EXPORT_SYMBOL_GPL(sensor_hub_device_open); |
570 | |
571 | void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) |
572 | { |
573 | struct sensor_hub_data *data = hid_get_drvdata(hdev: hsdev->hdev); |
574 | |
575 | mutex_lock(&data->mutex); |
576 | data->ref_cnt--; |
577 | if (!data->ref_cnt) |
578 | hid_hw_close(hdev: hsdev->hdev); |
579 | mutex_unlock(lock: &data->mutex); |
580 | } |
581 | EXPORT_SYMBOL_GPL(sensor_hub_device_close); |
582 | |
583 | static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
584 | unsigned int *rsize) |
585 | { |
586 | /* |
587 | * Checks if the report descriptor of Thinkpad Helix 2 has a logical |
588 | * minimum for magnetic flux axis greater than the maximum. |
589 | */ |
590 | if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && |
591 | *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && |
592 | rdesc[915] == 0x81 && rdesc[916] == 0x08 && |
593 | rdesc[917] == 0x00 && rdesc[918] == 0x27 && |
594 | rdesc[921] == 0x07 && rdesc[922] == 0x00) { |
595 | /* Sets negative logical minimum for mag x, y and z */ |
596 | rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; |
597 | rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; |
598 | rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; |
599 | rdesc[917] = rdesc[938] = rdesc[959] = 0xff; |
600 | } |
601 | |
602 | return rdesc; |
603 | } |
604 | |
605 | static int sensor_hub_probe(struct hid_device *hdev, |
606 | const struct hid_device_id *id) |
607 | { |
608 | int ret; |
609 | struct sensor_hub_data *sd; |
610 | int i; |
611 | char *name; |
612 | int dev_cnt; |
613 | struct hid_sensor_hub_device *hsdev; |
614 | struct hid_sensor_hub_device *last_hsdev = NULL; |
615 | struct hid_sensor_hub_device *collection_hsdev = NULL; |
616 | |
617 | sd = devm_kzalloc(dev: &hdev->dev, size: sizeof(*sd), GFP_KERNEL); |
618 | if (!sd) { |
619 | hid_err(hdev, "cannot allocate Sensor data\n" ); |
620 | return -ENOMEM; |
621 | } |
622 | |
623 | hid_set_drvdata(hdev, data: sd); |
624 | |
625 | spin_lock_init(&sd->lock); |
626 | spin_lock_init(&sd->dyn_callback_lock); |
627 | mutex_init(&sd->mutex); |
628 | ret = hid_parse(hdev); |
629 | if (ret) { |
630 | hid_err(hdev, "parse failed\n" ); |
631 | return ret; |
632 | } |
633 | INIT_LIST_HEAD(list: &hdev->inputs); |
634 | |
635 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
636 | if (ret) { |
637 | hid_err(hdev, "hw start failed\n" ); |
638 | return ret; |
639 | } |
640 | INIT_LIST_HEAD(list: &sd->dyn_callback_list); |
641 | sd->hid_sensor_client_cnt = 0; |
642 | |
643 | dev_cnt = sensor_hub_get_physical_device_count(hdev); |
644 | if (dev_cnt > HID_MAX_PHY_DEVICES) { |
645 | hid_err(hdev, "Invalid Physical device count\n" ); |
646 | ret = -EINVAL; |
647 | goto err_stop_hw; |
648 | } |
649 | sd->hid_sensor_hub_client_devs = devm_kcalloc(dev: &hdev->dev, |
650 | n: dev_cnt, |
651 | size: sizeof(struct mfd_cell), |
652 | GFP_KERNEL); |
653 | if (sd->hid_sensor_hub_client_devs == NULL) { |
654 | hid_err(hdev, "Failed to allocate memory for mfd cells\n" ); |
655 | ret = -ENOMEM; |
656 | goto err_stop_hw; |
657 | } |
658 | |
659 | for (i = 0; i < hdev->maxcollection; ++i) { |
660 | struct hid_collection *collection = &hdev->collection[i]; |
661 | |
662 | if (collection->type == HID_COLLECTION_PHYSICAL || |
663 | collection->type == HID_COLLECTION_APPLICATION) { |
664 | |
665 | hsdev = devm_kzalloc(dev: &hdev->dev, size: sizeof(*hsdev), |
666 | GFP_KERNEL); |
667 | if (!hsdev) { |
668 | hid_err(hdev, "cannot allocate hid_sensor_hub_device\n" ); |
669 | ret = -ENOMEM; |
670 | goto err_stop_hw; |
671 | } |
672 | hsdev->hdev = hdev; |
673 | hsdev->vendor_id = hdev->vendor; |
674 | hsdev->product_id = hdev->product; |
675 | hsdev->usage = collection->usage; |
676 | hsdev->mutex_ptr = devm_kzalloc(dev: &hdev->dev, |
677 | size: sizeof(struct mutex), |
678 | GFP_KERNEL); |
679 | if (!hsdev->mutex_ptr) { |
680 | ret = -ENOMEM; |
681 | goto err_stop_hw; |
682 | } |
683 | mutex_init(hsdev->mutex_ptr); |
684 | hsdev->start_collection_index = i; |
685 | if (last_hsdev) |
686 | last_hsdev->end_collection_index = i; |
687 | last_hsdev = hsdev; |
688 | name = devm_kasprintf(dev: &hdev->dev, GFP_KERNEL, |
689 | fmt: "HID-SENSOR-%x" , |
690 | collection->usage); |
691 | if (name == NULL) { |
692 | hid_err(hdev, "Failed MFD device name\n" ); |
693 | ret = -ENOMEM; |
694 | goto err_stop_hw; |
695 | } |
696 | sd->hid_sensor_hub_client_devs[ |
697 | sd->hid_sensor_client_cnt].name = name; |
698 | sd->hid_sensor_hub_client_devs[ |
699 | sd->hid_sensor_client_cnt].platform_data = |
700 | hsdev; |
701 | sd->hid_sensor_hub_client_devs[ |
702 | sd->hid_sensor_client_cnt].pdata_size = |
703 | sizeof(*hsdev); |
704 | hid_dbg(hdev, "Adding %s:%d\n" , name, |
705 | hsdev->start_collection_index); |
706 | sd->hid_sensor_client_cnt++; |
707 | if (collection_hsdev) |
708 | collection_hsdev->end_collection_index = i; |
709 | if (collection->type == HID_COLLECTION_APPLICATION && |
710 | collection->usage == HID_USAGE_SENSOR_COLLECTION) |
711 | collection_hsdev = hsdev; |
712 | } |
713 | } |
714 | if (last_hsdev) |
715 | last_hsdev->end_collection_index = i; |
716 | if (collection_hsdev) |
717 | collection_hsdev->end_collection_index = i; |
718 | |
719 | ret = mfd_add_hotplug_devices(parent: &hdev->dev, |
720 | cells: sd->hid_sensor_hub_client_devs, |
721 | n_devs: sd->hid_sensor_client_cnt); |
722 | if (ret < 0) |
723 | goto err_stop_hw; |
724 | |
725 | return ret; |
726 | |
727 | err_stop_hw: |
728 | hid_hw_stop(hdev); |
729 | |
730 | return ret; |
731 | } |
732 | |
733 | static void sensor_hub_remove(struct hid_device *hdev) |
734 | { |
735 | struct sensor_hub_data *data = hid_get_drvdata(hdev); |
736 | unsigned long flags; |
737 | int i; |
738 | |
739 | hid_dbg(hdev, " hardware removed\n" ); |
740 | hid_hw_close(hdev); |
741 | hid_hw_stop(hdev); |
742 | spin_lock_irqsave(&data->lock, flags); |
743 | for (i = 0; i < data->hid_sensor_client_cnt; ++i) { |
744 | struct hid_sensor_hub_device *hsdev = |
745 | data->hid_sensor_hub_client_devs[i].platform_data; |
746 | if (hsdev->pending.status) |
747 | complete(&hsdev->pending.ready); |
748 | } |
749 | spin_unlock_irqrestore(lock: &data->lock, flags); |
750 | mfd_remove_devices(parent: &hdev->dev); |
751 | mutex_destroy(lock: &data->mutex); |
752 | } |
753 | |
754 | static const struct hid_device_id sensor_hub_devices[] = { |
755 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, |
756 | HID_ANY_ID) }, |
757 | { } |
758 | }; |
759 | MODULE_DEVICE_TABLE(hid, sensor_hub_devices); |
760 | |
761 | static struct hid_driver sensor_hub_driver = { |
762 | .name = "hid-sensor-hub" , |
763 | .id_table = sensor_hub_devices, |
764 | .probe = sensor_hub_probe, |
765 | .remove = sensor_hub_remove, |
766 | .raw_event = sensor_hub_raw_event, |
767 | .report_fixup = sensor_hub_report_fixup, |
768 | #ifdef CONFIG_PM |
769 | .suspend = sensor_hub_suspend, |
770 | .resume = sensor_hub_resume, |
771 | .reset_resume = sensor_hub_reset_resume, |
772 | #endif |
773 | }; |
774 | module_hid_driver(sensor_hub_driver); |
775 | |
776 | MODULE_DESCRIPTION("HID Sensor Hub driver" ); |
777 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>" ); |
778 | MODULE_LICENSE("GPL" ); |
779 | |