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1/*
2 * HID Sensors Driver
3 * Copyright (c) 2012, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 */
19#include <linux/device.h>
20#include <linux/hid.h>
21#include <linux/module.h>
22#include <linux/slab.h>
23#include <linux/mfd/core.h>
24#include <linux/list.h>
25#include <linux/hid-sensor-ids.h>
26#include <linux/hid-sensor-hub.h>
27#include "hid-ids.h"
28
29#define HID_SENSOR_HUB_ENUM_QUIRK 0x01
30
31/**
32 * struct sensor_hub_pending - Synchronous read pending information
33 * @status: Pending status true/false.
34 * @ready: Completion synchronization data.
35 * @usage_id: Usage id for physical device, E.g. Gyro usage id.
36 * @attr_usage_id: Usage Id of a field, E.g. X-AXIS for a gyro.
37 * @raw_size: Response size for a read request.
38 * @raw_data: Place holder for received response.
39 */
40struct sensor_hub_pending {
41 bool status;
42 struct completion ready;
43 u32 usage_id;
44 u32 attr_usage_id;
45 int raw_size;
46 u8 *raw_data;
47};
48
49/**
50 * struct sensor_hub_data - Hold a instance data for a HID hub device
51 * @hsdev: Stored hid instance for current hub device.
52 * @mutex: Mutex to serialize synchronous request.
53 * @lock: Spin lock to protect pending request structure.
54 * @pending: Holds information of pending sync read request.
55 * @dyn_callback_list: Holds callback function
56 * @dyn_callback_lock: spin lock to protect callback list
57 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
58 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
59 * @ref_cnt: Number of MFD clients have opened this device
60 */
61struct sensor_hub_data {
62 struct mutex mutex;
63 spinlock_t lock;
64 struct sensor_hub_pending pending;
65 struct list_head dyn_callback_list;
66 spinlock_t dyn_callback_lock;
67 struct mfd_cell *hid_sensor_hub_client_devs;
68 int hid_sensor_client_cnt;
69 unsigned long quirks;
70 int ref_cnt;
71};
72
73/**
74 * struct hid_sensor_hub_callbacks_list - Stores callback list
75 * @list: list head.
76 * @usage_id: usage id for a physical device.
77 * @usage_callback: Stores registered callback functions.
78 * @priv: Private data for a physical device.
79 */
80struct hid_sensor_hub_callbacks_list {
81 struct list_head list;
82 u32 usage_id;
83 struct hid_sensor_hub_device *hsdev;
84 struct hid_sensor_hub_callbacks *usage_callback;
85 void *priv;
86};
87
88static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
89 int dir)
90{
91 struct hid_report *report;
92
93 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
94 if (report->id == id)
95 return report;
96 }
97 hid_warn(hdev, "No report with id 0x%x found\n", id);
98
99 return NULL;
100}
101
102static int sensor_hub_get_physical_device_count(struct hid_device *hdev)
103{
104 int i;
105 int count = 0;
106
107 for (i = 0; i < hdev->maxcollection; ++i) {
108 struct hid_collection *collection = &hdev->collection[i];
109 if (collection->type == HID_COLLECTION_PHYSICAL)
110 ++count;
111 }
112
113 return count;
114}
115
116static void sensor_hub_fill_attr_info(
117 struct hid_sensor_hub_attribute_info *info,
118 s32 index, s32 report_id, struct hid_field *field)
119{
120 info->index = index;
121 info->report_id = report_id;
122 info->units = field->unit;
123 info->unit_expo = field->unit_exponent;
124 info->size = (field->report_size * field->report_count)/8;
125 info->logical_minimum = field->logical_minimum;
126 info->logical_maximum = field->logical_maximum;
127}
128
129static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
130 struct hid_device *hdev,
131 u32 usage_id,
132 int collection_index,
133 struct hid_sensor_hub_device **hsdev,
134 void **priv)
135{
136 struct hid_sensor_hub_callbacks_list *callback;
137 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
138
139 spin_lock(&pdata->dyn_callback_lock);
140 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
141 if (callback->usage_id == usage_id &&
142 (collection_index >=
143 callback->hsdev->start_collection_index) &&
144 (collection_index <
145 callback->hsdev->end_collection_index)) {
146 *priv = callback->priv;
147 *hsdev = callback->hsdev;
148 spin_unlock(&pdata->dyn_callback_lock);
149 return callback->usage_callback;
150 }
151 spin_unlock(&pdata->dyn_callback_lock);
152
153 return NULL;
154}
155
156int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
157 u32 usage_id,
158 struct hid_sensor_hub_callbacks *usage_callback)
159{
160 struct hid_sensor_hub_callbacks_list *callback;
161 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
162
163 spin_lock(&pdata->dyn_callback_lock);
164 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
165 if (callback->usage_id == usage_id &&
166 callback->hsdev == hsdev) {
167 spin_unlock(&pdata->dyn_callback_lock);
168 return -EINVAL;
169 }
170 callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
171 if (!callback) {
172 spin_unlock(&pdata->dyn_callback_lock);
173 return -ENOMEM;
174 }
175 callback->hsdev = hsdev;
176 callback->usage_callback = usage_callback;
177 callback->usage_id = usage_id;
178 callback->priv = NULL;
179 list_add_tail(&callback->list, &pdata->dyn_callback_list);
180 spin_unlock(&pdata->dyn_callback_lock);
181
182 return 0;
183}
184EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
185
186int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
187 u32 usage_id)
188{
189 struct hid_sensor_hub_callbacks_list *callback;
190 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
191
192 spin_lock(&pdata->dyn_callback_lock);
193 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
194 if (callback->usage_id == usage_id &&
195 callback->hsdev == hsdev) {
196 list_del(&callback->list);
197 kfree(callback);
198 break;
199 }
200 spin_unlock(&pdata->dyn_callback_lock);
201
202 return 0;
203}
204EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
205
206int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
207 u32 field_index, s32 value)
208{
209 struct hid_report *report;
210 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
211 int ret = 0;
212
213 mutex_lock(&data->mutex);
214 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
215 if (!report || (field_index >= report->maxfield)) {
216 ret = -EINVAL;
217 goto done_proc;
218 }
219 hid_set_field(report->field[field_index], 0, value);
220 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
221 hid_hw_wait(hsdev->hdev);
222
223done_proc:
224 mutex_unlock(&data->mutex);
225
226 return ret;
227}
228EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
229
230int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
231 u32 field_index, s32 *value)
232{
233 struct hid_report *report;
234 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
235 int ret = 0;
236
237 mutex_lock(&data->mutex);
238 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
239 if (!report || (field_index >= report->maxfield) ||
240 report->field[field_index]->report_count < 1) {
241 ret = -EINVAL;
242 goto done_proc;
243 }
244 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
245 hid_hw_wait(hsdev->hdev);
246 *value = report->field[field_index]->value[0];
247
248done_proc:
249 mutex_unlock(&data->mutex);
250
251 return ret;
252}
253EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
254
255
256int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
257 u32 usage_id,
258 u32 attr_usage_id, u32 report_id)
259{
260 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
261 unsigned long flags;
262 struct hid_report *report;
263 int ret_val = 0;
264
265 mutex_lock(&data->mutex);
266 memset(&data->pending, 0, sizeof(data->pending));
267 init_completion(&data->pending.ready);
268 data->pending.usage_id = usage_id;
269 data->pending.attr_usage_id = attr_usage_id;
270 data->pending.raw_size = 0;
271
272 spin_lock_irqsave(&data->lock, flags);
273 data->pending.status = true;
274 spin_unlock_irqrestore(&data->lock, flags);
275 report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
276 if (!report)
277 goto err_free;
278
279 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
280 wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
281 switch (data->pending.raw_size) {
282 case 1:
283 ret_val = *(u8 *)data->pending.raw_data;
284 break;
285 case 2:
286 ret_val = *(u16 *)data->pending.raw_data;
287 break;
288 case 4:
289 ret_val = *(u32 *)data->pending.raw_data;
290 break;
291 default:
292 ret_val = 0;
293 }
294 kfree(data->pending.raw_data);
295
296err_free:
297 data->pending.status = false;
298 mutex_unlock(&data->mutex);
299
300 return ret_val;
301}
302EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
303
304int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
305 u32 report_id, int field_index, u32 usage_id)
306{
307 struct hid_report *report;
308 struct hid_field *field;
309 int i;
310
311 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
312 if (!report || (field_index >= report->maxfield))
313 goto done_proc;
314
315 field = report->field[field_index];
316 for (i = 0; i < field->maxusage; ++i) {
317 if (field->usage[i].hid == usage_id)
318 return field->usage[i].usage_index;
319 }
320
321done_proc:
322 return -EINVAL;
323}
324EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
325
326int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
327 u8 type,
328 u32 usage_id,
329 u32 attr_usage_id,
330 struct hid_sensor_hub_attribute_info *info)
331{
332 int ret = -1;
333 int i;
334 struct hid_report *report;
335 struct hid_field *field;
336 struct hid_report_enum *report_enum;
337 struct hid_device *hdev = hsdev->hdev;
338
339 /* Initialize with defaults */
340 info->usage_id = usage_id;
341 info->attrib_id = attr_usage_id;
342 info->report_id = -1;
343 info->index = -1;
344 info->units = -1;
345 info->unit_expo = -1;
346
347 report_enum = &hdev->report_enum[type];
348 list_for_each_entry(report, &report_enum->report_list, list) {
349 for (i = 0; i < report->maxfield; ++i) {
350 field = report->field[i];
351 if (field->maxusage) {
352 if (field->physical == usage_id &&
353 (field->logical == attr_usage_id ||
354 field->usage[0].hid ==
355 attr_usage_id) &&
356 (field->usage[0].collection_index >=
357 hsdev->start_collection_index) &&
358 (field->usage[0].collection_index <
359 hsdev->end_collection_index)) {
360
361 sensor_hub_fill_attr_info(info, i,
362 report->id,
363 field);
364 ret = 0;
365 break;
366 }
367 }
368 }
369
370 }
371
372 return ret;
373}
374EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
375
376#ifdef CONFIG_PM
377static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
378{
379 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
380 struct hid_sensor_hub_callbacks_list *callback;
381
382 hid_dbg(hdev, " sensor_hub_suspend\n");
383 spin_lock(&pdata->dyn_callback_lock);
384 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
385 if (callback->usage_callback->suspend)
386 callback->usage_callback->suspend(
387 callback->hsdev, callback->priv);
388 }
389 spin_unlock(&pdata->dyn_callback_lock);
390
391 return 0;
392}
393
394static int sensor_hub_resume(struct hid_device *hdev)
395{
396 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
397 struct hid_sensor_hub_callbacks_list *callback;
398
399 hid_dbg(hdev, " sensor_hub_resume\n");
400 spin_lock(&pdata->dyn_callback_lock);
401 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
402 if (callback->usage_callback->resume)
403 callback->usage_callback->resume(
404 callback->hsdev, callback->priv);
405 }
406 spin_unlock(&pdata->dyn_callback_lock);
407
408 return 0;
409}
410
411static int sensor_hub_reset_resume(struct hid_device *hdev)
412{
413 return 0;
414}
415#endif
416
417/*
418 * Handle raw report as sent by device
419 */
420static int sensor_hub_raw_event(struct hid_device *hdev,
421 struct hid_report *report, u8 *raw_data, int size)
422{
423 int i;
424 u8 *ptr;
425 int sz;
426 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
427 unsigned long flags;
428 struct hid_sensor_hub_callbacks *callback = NULL;
429 struct hid_collection *collection = NULL;
430 void *priv = NULL;
431 struct hid_sensor_hub_device *hsdev = NULL;
432
433 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
434 report->id, size, report->type);
435 hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
436 if (report->type != HID_INPUT_REPORT)
437 return 1;
438
439 ptr = raw_data;
440 ptr++; /* Skip report id */
441
442 spin_lock_irqsave(&pdata->lock, flags);
443
444 for (i = 0; i < report->maxfield; ++i) {
445 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
446 i, report->field[i]->usage->collection_index,
447 report->field[i]->usage->hid,
448 (report->field[i]->report_size *
449 report->field[i]->report_count)/8);
450 sz = (report->field[i]->report_size *
451 report->field[i]->report_count)/8;
452 if (pdata->pending.status && pdata->pending.attr_usage_id ==
453 report->field[i]->usage->hid) {
454 hid_dbg(hdev, "data was pending ...\n");
455 pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
456 if (pdata->pending.raw_data)
457 pdata->pending.raw_size = sz;
458 else
459 pdata->pending.raw_size = 0;
460 complete(&pdata->pending.ready);
461 }
462 collection = &hdev->collection[
463 report->field[i]->usage->collection_index];
464 hid_dbg(hdev, "collection->usage %x\n",
465 collection->usage);
466
467 callback = sensor_hub_get_callback(hdev,
468 report->field[i]->physical,
469 report->field[i]->usage[0].collection_index,
470 &hsdev, &priv);
471
472 if (callback && callback->capture_sample) {
473 if (report->field[i]->logical)
474 callback->capture_sample(hsdev,
475 report->field[i]->logical, sz, ptr,
476 callback->pdev);
477 else
478 callback->capture_sample(hsdev,
479 report->field[i]->usage->hid, sz, ptr,
480 callback->pdev);
481 }
482 ptr += sz;
483 }
484 if (callback && collection && callback->send_event)
485 callback->send_event(hsdev, collection->usage,
486 callback->pdev);
487 spin_unlock_irqrestore(&pdata->lock, flags);
488
489 return 1;
490}
491
492int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
493{
494 int ret = 0;
495 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
496
497 mutex_lock(&data->mutex);
498 if (!data->ref_cnt) {
499 ret = hid_hw_open(hsdev->hdev);
500 if (ret) {
501 hid_err(hsdev->hdev, "failed to open hid device\n");
502 mutex_unlock(&data->mutex);
503 return ret;
504 }
505 }
506 data->ref_cnt++;
507 mutex_unlock(&data->mutex);
508
509 return ret;
510}
511EXPORT_SYMBOL_GPL(sensor_hub_device_open);
512
513void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
514{
515 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
516
517 mutex_lock(&data->mutex);
518 data->ref_cnt--;
519 if (!data->ref_cnt)
520 hid_hw_close(hsdev->hdev);
521 mutex_unlock(&data->mutex);
522}
523EXPORT_SYMBOL_GPL(sensor_hub_device_close);
524
525static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
526 unsigned int *rsize)
527{
528 int index;
529 struct sensor_hub_data *sd = hid_get_drvdata(hdev);
530 unsigned char report_block[] = {
531 0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
532 unsigned char power_block[] = {
533 0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
534
535 if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
536 hid_dbg(hdev, "No Enum quirks\n");
537 return rdesc;
538 }
539
540 /* Looks for power and report state usage id and force to 1 */
541 for (index = 0; index < *rsize; ++index) {
542 if (((*rsize - index) > sizeof(report_block)) &&
543 !memcmp(&rdesc[index], report_block,
544 sizeof(report_block))) {
545 rdesc[index + 4] = 0x01;
546 index += sizeof(report_block);
547 }
548 if (((*rsize - index) > sizeof(power_block)) &&
549 !memcmp(&rdesc[index], power_block,
550 sizeof(power_block))) {
551 rdesc[index + 4] = 0x01;
552 index += sizeof(power_block);
553 }
554 }
555
556 return rdesc;
557}
558
559static int sensor_hub_probe(struct hid_device *hdev,
560 const struct hid_device_id *id)
561{
562 int ret;
563 struct sensor_hub_data *sd;
564 int i;
565 char *name;
566 int dev_cnt;
567 struct hid_sensor_hub_device *hsdev;
568 struct hid_sensor_hub_device *last_hsdev = NULL;
569
570 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
571 if (!sd) {
572 hid_err(hdev, "cannot allocate Sensor data\n");
573 return -ENOMEM;
574 }
575
576 hid_set_drvdata(hdev, sd);
577 sd->quirks = id->driver_data;
578
579 spin_lock_init(&sd->lock);
580 spin_lock_init(&sd->dyn_callback_lock);
581 mutex_init(&sd->mutex);
582 ret = hid_parse(hdev);
583 if (ret) {
584 hid_err(hdev, "parse failed\n");
585 return ret;
586 }
587 INIT_LIST_HEAD(&hdev->inputs);
588
589 ret = hid_hw_start(hdev, 0);
590 if (ret) {
591 hid_err(hdev, "hw start failed\n");
592 return ret;
593 }
594 INIT_LIST_HEAD(&sd->dyn_callback_list);
595 sd->hid_sensor_client_cnt = 0;
596
597 dev_cnt = sensor_hub_get_physical_device_count(hdev);
598 if (dev_cnt > HID_MAX_PHY_DEVICES) {
599 hid_err(hdev, "Invalid Physical device count\n");
600 ret = -EINVAL;
601 goto err_stop_hw;
602 }
603 sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
604 sizeof(struct mfd_cell),
605 GFP_KERNEL);
606 if (sd->hid_sensor_hub_client_devs == NULL) {
607 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
608 ret = -ENOMEM;
609 goto err_stop_hw;
610 }
611
612 for (i = 0; i < hdev->maxcollection; ++i) {
613 struct hid_collection *collection = &hdev->collection[i];
614
615 if (collection->type == HID_COLLECTION_PHYSICAL) {
616
617 hsdev = kzalloc(sizeof(*hsdev), GFP_KERNEL);
618 if (!hsdev) {
619 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
620 ret = -ENOMEM;
621 goto err_no_mem;
622 }
623 hsdev->hdev = hdev;
624 hsdev->vendor_id = hdev->vendor;
625 hsdev->product_id = hdev->product;
626 hsdev->start_collection_index = i;
627 if (last_hsdev)
628 last_hsdev->end_collection_index = i;
629 last_hsdev = hsdev;
630 name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
631 collection->usage);
632 if (name == NULL) {
633 hid_err(hdev, "Failed MFD device name\n");
634 ret = -ENOMEM;
635 goto err_no_mem;
636 }
637 sd->hid_sensor_hub_client_devs[
638 sd->hid_sensor_client_cnt].id =
639 PLATFORM_DEVID_AUTO;
640 sd->hid_sensor_hub_client_devs[
641 sd->hid_sensor_client_cnt].name = name;
642 sd->hid_sensor_hub_client_devs[
643 sd->hid_sensor_client_cnt].platform_data =
644 hsdev;
645 sd->hid_sensor_hub_client_devs[
646 sd->hid_sensor_client_cnt].pdata_size =
647 sizeof(*hsdev);
648 hid_dbg(hdev, "Adding %s:%d\n", name,
649 hsdev->start_collection_index);
650 sd->hid_sensor_client_cnt++;
651 }
652 }
653 if (last_hsdev)
654 last_hsdev->end_collection_index = i;
655
656 ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
657 sd->hid_sensor_client_cnt, NULL, 0, NULL);
658 if (ret < 0)
659 goto err_no_mem;
660
661 return ret;
662
663err_no_mem:
664 for (i = 0; i < sd->hid_sensor_client_cnt; ++i) {
665 kfree(sd->hid_sensor_hub_client_devs[i].name);
666 kfree(sd->hid_sensor_hub_client_devs[i].platform_data);
667 }
668 kfree(sd->hid_sensor_hub_client_devs);
669err_stop_hw:
670 hid_hw_stop(hdev);
671
672 return ret;
673}
674
675static void sensor_hub_remove(struct hid_device *hdev)
676{
677 struct sensor_hub_data *data = hid_get_drvdata(hdev);
678 unsigned long flags;
679 int i;
680
681 hid_dbg(hdev, " hardware removed\n");
682 hid_hw_close(hdev);
683 hid_hw_stop(hdev);
684 spin_lock_irqsave(&data->lock, flags);
685 if (data->pending.status)
686 complete(&data->pending.ready);
687 spin_unlock_irqrestore(&data->lock, flags);
688 mfd_remove_devices(&hdev->dev);
689 for (i = 0; i < data->hid_sensor_client_cnt; ++i) {
690 kfree(data->hid_sensor_hub_client_devs[i].name);
691 kfree(data->hid_sensor_hub_client_devs[i].platform_data);
692 }
693 kfree(data->hid_sensor_hub_client_devs);
694 hid_set_drvdata(hdev, NULL);
695 mutex_destroy(&data->mutex);
696}
697
698static const struct hid_device_id sensor_hub_devices[] = {
699 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
700 USB_DEVICE_ID_INTEL_HID_SENSOR_0),
701 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
702 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
703 USB_DEVICE_ID_INTEL_HID_SENSOR_0),
704 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
705 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
706 USB_DEVICE_ID_INTEL_HID_SENSOR_1),
707 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
708 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
709 USB_DEVICE_ID_STM_HID_SENSOR),
710 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
711 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS,
712 USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA),
713 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
714 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
715 HID_ANY_ID) },
716 { }
717};
718MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
719
720static struct hid_driver sensor_hub_driver = {
721 .name = "hid-sensor-hub",
722 .id_table = sensor_hub_devices,
723 .probe = sensor_hub_probe,
724 .remove = sensor_hub_remove,
725 .raw_event = sensor_hub_raw_event,
726 .report_fixup = sensor_hub_report_fixup,
727#ifdef CONFIG_PM
728 .suspend = sensor_hub_suspend,
729 .resume = sensor_hub_resume,
730 .reset_resume = sensor_hub_reset_resume,
731#endif
732};
733module_hid_driver(sensor_hub_driver);
734
735MODULE_DESCRIPTION("HID Sensor Hub driver");
736MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
737MODULE_LICENSE("GPL");
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 */
29struct 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 */
47struct 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
55static 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
69static 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
84static 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
97static 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
127int 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}
167EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
168
169int 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}
188EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
189
190int 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
231done_proc:
232 mutex_unlock(&data->mutex);
233
234 return ret;
235}
236EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
237
238int 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
282done_proc:
283 mutex_unlock(&data->mutex);
284
285 return ret;
286}
287EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
288
289
290int 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}
350EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
351
352int 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
369done_proc:
370 return -EINVAL;
371}
372EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
373
374int 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}
423EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
424
425#ifdef CONFIG_PM
426static 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
444static 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
462static 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 */
471static 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
550int 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}
569EXPORT_SYMBOL_GPL(sensor_hub_device_open);
570
571void 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}
581EXPORT_SYMBOL_GPL(sensor_hub_device_close);
582
583static const __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
605static 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
727err_stop_hw:
728 hid_hw_stop(hdev);
729
730 return ret;
731}
732
733static int sensor_hub_finalize_pending_fn(struct device *dev, void *data)
734{
735 struct hid_sensor_hub_device *hsdev = dev->platform_data;
736
737 if (hsdev->pending.status)
738 complete(&hsdev->pending.ready);
739
740 return 0;
741}
742
743static void sensor_hub_remove(struct hid_device *hdev)
744{
745 struct sensor_hub_data *data = hid_get_drvdata(hdev);
746 unsigned long flags;
747
748 hid_dbg(hdev, " hardware removed\n");
749 hid_hw_close(hdev);
750 hid_hw_stop(hdev);
751
752 spin_lock_irqsave(&data->lock, flags);
753 device_for_each_child(&hdev->dev, NULL,
754 sensor_hub_finalize_pending_fn);
755 spin_unlock_irqrestore(&data->lock, flags);
756
757 mfd_remove_devices(&hdev->dev);
758 mutex_destroy(&data->mutex);
759}
760
761static const struct hid_device_id sensor_hub_devices[] = {
762 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
763 HID_ANY_ID) },
764 { }
765};
766MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
767
768static struct hid_driver sensor_hub_driver = {
769 .name = "hid-sensor-hub",
770 .id_table = sensor_hub_devices,
771 .probe = sensor_hub_probe,
772 .remove = sensor_hub_remove,
773 .raw_event = sensor_hub_raw_event,
774 .report_fixup = sensor_hub_report_fixup,
775#ifdef CONFIG_PM
776 .suspend = sensor_hub_suspend,
777 .resume = sensor_hub_resume,
778 .reset_resume = sensor_hub_reset_resume,
779#endif
780};
781module_hid_driver(sensor_hub_driver);
782
783MODULE_DESCRIPTION("HID Sensor Hub driver");
784MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
785MODULE_LICENSE("GPL");