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
sensor_hub_report(int id,struct hid_device * hdev,int dir)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
sensor_hub_get_physical_device_count(struct hid_device * hdev)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
sensor_hub_fill_attr_info(struct hid_sensor_hub_attribute_info * info,s32 index,s32 report_id,struct hid_field * field)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
sensor_hub_get_callback(struct hid_device * hdev,u32 usage_id,int collection_index,struct hid_sensor_hub_device ** hsdev,void ** priv)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(&pdata->dyn_callback_lock,
119 flags);
120 return callback->usage_callback;
121 }
122 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
123
124 return NULL;
125 }
126
sensor_hub_register_callback(struct hid_sensor_hub_device * hsdev,u32 usage_id,struct hid_sensor_hub_callbacks * usage_callback)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(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(&pdata->dyn_callback_lock, flags);
140 return -EINVAL;
141 }
142 callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
143 if (!callback) {
144 spin_unlock_irqrestore(&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(&callback->list, &pdata->dyn_callback_list);
161 else
162 list_add_tail(&callback->list, &pdata->dyn_callback_list);
163 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
164
165 return 0;
166 }
167 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
168
sensor_hub_remove_callback(struct hid_sensor_hub_device * hsdev,u32 usage_id)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(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(&callback->list);
181 kfree(callback);
182 break;
183 }
184 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
185
186 return 0;
187 }
188 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
189
sensor_hub_set_feature(struct hid_sensor_hub_device * hsdev,u32 report_id,u32 field_index,int buffer_size,void * buffer)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(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(report_id, hsdev->hdev, 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(hsdev->hdev, report, HID_REQ_SET_REPORT);
229 hid_hw_wait(hsdev->hdev);
230
231 done_proc:
232 mutex_unlock(&data->mutex);
233
234 return ret;
235 }
236 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
237
sensor_hub_get_feature(struct hid_sensor_hub_device * hsdev,u32 report_id,u32 field_index,int buffer_size,void * buffer)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(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(report_id, hsdev->hdev, 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(hsdev->hdev, report, HID_REQ_GET_REPORT);
259 hid_hw_wait(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(&data->mutex);
284
285 return ret;
286 }
287 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
288
289
sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device * hsdev,u32 usage_id,u32 attr_usage_id,u32 report_id,enum sensor_hub_read_flags flag,bool is_signed)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(hsdev->hdev);
297 unsigned long flags;
298 struct hid_report *report;
299 int ret_val = 0;
300
301 report = sensor_hub_report(report_id, hsdev->hdev,
302 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(&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(&data->lock, flags);
317 }
318 mutex_lock(&data->mutex);
319 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
320 mutex_unlock(&data->mutex);
321 if (flag == SENSOR_HUB_SYNC) {
322 wait_for_completion_interruptible_timeout(
323 &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(hsdev->pending.raw_data);
344 hsdev->pending.status = false;
345 }
346 mutex_unlock(hsdev->mutex_ptr);
347
348 return ret_val;
349 }
350 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
351
hid_sensor_get_usage_index(struct hid_sensor_hub_device * hsdev,u32 report_id,int field_index,u32 usage_id)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(report_id, hsdev->hdev, 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
sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device * hsdev,u8 type,u32 usage_id,u32 attr_usage_id,struct hid_sensor_hub_attribute_info * info)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, i,
411 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
sensor_hub_suspend(struct hid_device * hdev,pm_message_t message)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(&pdata->dyn_callback_lock, flags);
440
441 return 0;
442 }
443
sensor_hub_resume(struct hid_device * hdev)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(&pdata->dyn_callback_lock, flags);
458
459 return 0;
460 }
461
sensor_hub_reset_resume(struct hid_device * hdev)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 */
sensor_hub_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * raw_data,int size)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 report->field[i]->physical ? report->field[i]->physical :
511 report->field[i]->application,
512 report->field[i]->usage[0].collection_index,
513 &hsdev, &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(ptr, 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(&pdata->lock, flags);
546
547 return 1;
548 }
549
sensor_hub_device_open(struct hid_sensor_hub_device * hsdev)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(hsdev->hdev);
554
555 mutex_lock(&data->mutex);
556 if (!data->ref_cnt) {
557 ret = hid_hw_open(hsdev->hdev);
558 if (ret) {
559 hid_err(hsdev->hdev, "failed to open hid device\n");
560 mutex_unlock(&data->mutex);
561 return ret;
562 }
563 }
564 data->ref_cnt++;
565 mutex_unlock(&data->mutex);
566
567 return ret;
568 }
569 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
570
sensor_hub_device_close(struct hid_sensor_hub_device * hsdev)571 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
572 {
573 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
574
575 mutex_lock(&data->mutex);
576 data->ref_cnt--;
577 if (!data->ref_cnt)
578 hid_hw_close(hsdev->hdev);
579 mutex_unlock(&data->mutex);
580 }
581 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
582
sensor_hub_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)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
sensor_hub_probe(struct hid_device * hdev,const struct hid_device_id * id)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(&hdev->dev, 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, 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(&hdev->inputs);
634
635 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT | HID_CONNECT_DRIVER);
636 if (ret) {
637 hid_err(hdev, "hw start failed\n");
638 return ret;
639 }
640 INIT_LIST_HEAD(&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(&hdev->dev,
650 dev_cnt,
651 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(&hdev->dev, 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(&hdev->dev,
677 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(&hdev->dev, GFP_KERNEL,
689 "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(&hdev->dev,
720 sd->hid_sensor_hub_client_devs,
721 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
sensor_hub_remove(struct hid_device * hdev)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(&data->lock, flags);
750 mfd_remove_devices(&hdev->dev);
751 mutex_destroy(&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