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
20#include <linux/device.h>
21#include <linux/hid.h>
22#include <linux/module.h>
23#include <linux/slab.h>
24#include <linux/mfd/core.h>
25#include <linux/list.h>
26#include <linux/hid-sensor-ids.h>
27#include <linux/hid-sensor-hub.h>
28#include "hid-ids.h"
29
30#define HID_SENSOR_HUB_ENUM_QUIRK 0x01
31
32/**
33 * struct sensor_hub_data - Hold a instance data for a HID hub device
34 * @hsdev: Stored hid instance for current hub device.
35 * @mutex: Mutex to serialize synchronous request.
36 * @lock: Spin lock to protect pending request structure.
37 * @dyn_callback_list: Holds callback function
38 * @dyn_callback_lock: spin lock to protect callback list
39 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
40 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
41 * @ref_cnt: Number of MFD clients have opened this device
42 */
43struct sensor_hub_data {
44 struct mutex mutex;
45 spinlock_t lock;
46 struct list_head dyn_callback_list;
47 spinlock_t dyn_callback_lock;
48 struct mfd_cell *hid_sensor_hub_client_devs;
49 int hid_sensor_client_cnt;
50 unsigned long quirks;
51 int ref_cnt;
52};
53
54/**
55 * struct hid_sensor_hub_callbacks_list - Stores callback list
56 * @list: list head.
57 * @usage_id: usage id for a physical device.
58 * @usage_callback: Stores registered callback functions.
59 * @priv: Private data for a physical device.
60 */
61struct hid_sensor_hub_callbacks_list {
62 struct list_head list;
63 u32 usage_id;
64 struct hid_sensor_hub_device *hsdev;
65 struct hid_sensor_hub_callbacks *usage_callback;
66 void *priv;
67};
68
69static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
70 int dir)
71{
72 struct hid_report *report;
73
74 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
75 if (report->id == id)
76 return report;
77 }
78 hid_warn(hdev, "No report with id 0x%x found\n", id);
79
80 return NULL;
81}
82
83static int sensor_hub_get_physical_device_count(struct hid_device *hdev)
84{
85 int i;
86 int count = 0;
87
88 for (i = 0; i < hdev->maxcollection; ++i) {
89 struct hid_collection *collection = &hdev->collection[i];
90 if (collection->type == HID_COLLECTION_PHYSICAL ||
91 collection->type == HID_COLLECTION_APPLICATION)
92 ++count;
93 }
94
95 return count;
96}
97
98static void sensor_hub_fill_attr_info(
99 struct hid_sensor_hub_attribute_info *info,
100 s32 index, s32 report_id, struct hid_field *field)
101{
102 info->index = index;
103 info->report_id = report_id;
104 info->units = field->unit;
105 info->unit_expo = field->unit_exponent;
106 info->size = (field->report_size * field->report_count)/8;
107 info->logical_minimum = field->logical_minimum;
108 info->logical_maximum = field->logical_maximum;
109}
110
111static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
112 struct hid_device *hdev,
113 u32 usage_id,
114 int collection_index,
115 struct hid_sensor_hub_device **hsdev,
116 void **priv)
117{
118 struct hid_sensor_hub_callbacks_list *callback;
119 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
120 unsigned long flags;
121
122 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
123 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
124 if ((callback->usage_id == usage_id ||
125 callback->usage_id == HID_USAGE_SENSOR_COLLECTION) &&
126 (collection_index >=
127 callback->hsdev->start_collection_index) &&
128 (collection_index <
129 callback->hsdev->end_collection_index)) {
130 *priv = callback->priv;
131 *hsdev = callback->hsdev;
132 spin_unlock_irqrestore(&pdata->dyn_callback_lock,
133 flags);
134 return callback->usage_callback;
135 }
136 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
137
138 return NULL;
139}
140
141int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
142 u32 usage_id,
143 struct hid_sensor_hub_callbacks *usage_callback)
144{
145 struct hid_sensor_hub_callbacks_list *callback;
146 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
147 unsigned long flags;
148
149 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
150 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
151 if (callback->usage_id == usage_id &&
152 callback->hsdev == hsdev) {
153 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
154 return -EINVAL;
155 }
156 callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
157 if (!callback) {
158 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
159 return -ENOMEM;
160 }
161 callback->hsdev = hsdev;
162 callback->usage_callback = usage_callback;
163 callback->usage_id = usage_id;
164 callback->priv = NULL;
165 /*
166 * If there is a handler registered for the collection type, then
167 * it will handle all reports for sensors in this collection. If
168 * there is also an individual sensor handler registration, then
169 * we want to make sure that the reports are directed to collection
170 * handler, as this may be a fusion sensor. So add collection handlers
171 * to the beginning of the list, so that they are matched first.
172 */
173 if (usage_id == HID_USAGE_SENSOR_COLLECTION)
174 list_add(&callback->list, &pdata->dyn_callback_list);
175 else
176 list_add_tail(&callback->list, &pdata->dyn_callback_list);
177 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
178
179 return 0;
180}
181EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
182
183int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
184 u32 usage_id)
185{
186 struct hid_sensor_hub_callbacks_list *callback;
187 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
188 unsigned long flags;
189
190 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
191 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
192 if (callback->usage_id == usage_id &&
193 callback->hsdev == hsdev) {
194 list_del(&callback->list);
195 kfree(callback);
196 break;
197 }
198 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
199
200 return 0;
201}
202EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
203
204int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
205 u32 field_index, int buffer_size, void *buffer)
206{
207 struct hid_report *report;
208 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
209 __s32 *buf32 = buffer;
210 int i = 0;
211 int remaining_bytes;
212 __s32 value;
213 int ret = 0;
214
215 mutex_lock(&data->mutex);
216 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
217 if (!report || (field_index >= report->maxfield)) {
218 ret = -EINVAL;
219 goto done_proc;
220 }
221
222 remaining_bytes = buffer_size % sizeof(__s32);
223 buffer_size = buffer_size / sizeof(__s32);
224 if (buffer_size) {
225 for (i = 0; i < buffer_size; ++i) {
226 hid_set_field(report->field[field_index], i,
227 (__force __s32)cpu_to_le32(*buf32));
228 ++buf32;
229 }
230 }
231 if (remaining_bytes) {
232 value = 0;
233 memcpy(&value, (u8 *)buf32, remaining_bytes);
234 hid_set_field(report->field[field_index], i,
235 (__force __s32)cpu_to_le32(value));
236 }
237 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
238 hid_hw_wait(hsdev->hdev);
239
240done_proc:
241 mutex_unlock(&data->mutex);
242
243 return ret;
244}
245EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
246
247int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
248 u32 field_index, int buffer_size, void *buffer)
249{
250 struct hid_report *report;
251 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
252 int report_size;
253 int ret = 0;
254 u8 *val_ptr;
255 int buffer_index = 0;
256 int i;
257
258 memset(buffer, 0, buffer_size);
259
260 mutex_lock(&data->mutex);
261 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
262 if (!report || (field_index >= report->maxfield) ||
263 report->field[field_index]->report_count < 1) {
264 ret = -EINVAL;
265 goto done_proc;
266 }
267 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
268 hid_hw_wait(hsdev->hdev);
269
270 /* calculate number of bytes required to read this field */
271 report_size = DIV_ROUND_UP(report->field[field_index]->report_size,
272 8) *
273 report->field[field_index]->report_count;
274 if (!report_size) {
275 ret = -EINVAL;
276 goto done_proc;
277 }
278 ret = min(report_size, buffer_size);
279
280 val_ptr = (u8 *)report->field[field_index]->value;
281 for (i = 0; i < report->field[field_index]->report_count; ++i) {
282 if (buffer_index >= ret)
283 break;
284
285 memcpy(&((u8 *)buffer)[buffer_index], val_ptr,
286 report->field[field_index]->report_size / 8);
287 val_ptr += sizeof(__s32);
288 buffer_index += (report->field[field_index]->report_size / 8);
289 }
290
291done_proc:
292 mutex_unlock(&data->mutex);
293
294 return ret;
295}
296EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
297
298
299int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
300 u32 usage_id,
301 u32 attr_usage_id, u32 report_id,
302 enum sensor_hub_read_flags flag,
303 bool is_signed)
304{
305 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
306 unsigned long flags;
307 struct hid_report *report;
308 int ret_val = 0;
309
310 report = sensor_hub_report(report_id, hsdev->hdev,
311 HID_INPUT_REPORT);
312 if (!report)
313 return -EINVAL;
314
315 mutex_lock(hsdev->mutex_ptr);
316 if (flag == SENSOR_HUB_SYNC) {
317 memset(&hsdev->pending, 0, sizeof(hsdev->pending));
318 init_completion(&hsdev->pending.ready);
319 hsdev->pending.usage_id = usage_id;
320 hsdev->pending.attr_usage_id = attr_usage_id;
321 hsdev->pending.raw_size = 0;
322
323 spin_lock_irqsave(&data->lock, flags);
324 hsdev->pending.status = true;
325 spin_unlock_irqrestore(&data->lock, flags);
326 }
327 mutex_lock(&data->mutex);
328 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
329 mutex_unlock(&data->mutex);
330 if (flag == SENSOR_HUB_SYNC) {
331 wait_for_completion_interruptible_timeout(
332 &hsdev->pending.ready, HZ*5);
333 switch (hsdev->pending.raw_size) {
334 case 1:
335 if (is_signed)
336 ret_val = *(s8 *)hsdev->pending.raw_data;
337 else
338 ret_val = *(u8 *)hsdev->pending.raw_data;
339 break;
340 case 2:
341 if (is_signed)
342 ret_val = *(s16 *)hsdev->pending.raw_data;
343 else
344 ret_val = *(u16 *)hsdev->pending.raw_data;
345 break;
346 case 4:
347 ret_val = *(u32 *)hsdev->pending.raw_data;
348 break;
349 default:
350 ret_val = 0;
351 }
352 kfree(hsdev->pending.raw_data);
353 hsdev->pending.status = false;
354 }
355 mutex_unlock(hsdev->mutex_ptr);
356
357 return ret_val;
358}
359EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
360
361int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
362 u32 report_id, int field_index, u32 usage_id)
363{
364 struct hid_report *report;
365 struct hid_field *field;
366 int i;
367
368 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
369 if (!report || (field_index >= report->maxfield))
370 goto done_proc;
371
372 field = report->field[field_index];
373 for (i = 0; i < field->maxusage; ++i) {
374 if (field->usage[i].hid == usage_id)
375 return field->usage[i].usage_index;
376 }
377
378done_proc:
379 return -EINVAL;
380}
381EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
382
383int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
384 u8 type,
385 u32 usage_id,
386 u32 attr_usage_id,
387 struct hid_sensor_hub_attribute_info *info)
388{
389 int ret = -1;
390 int i;
391 struct hid_report *report;
392 struct hid_field *field;
393 struct hid_report_enum *report_enum;
394 struct hid_device *hdev = hsdev->hdev;
395
396 /* Initialize with defaults */
397 info->usage_id = usage_id;
398 info->attrib_id = attr_usage_id;
399 info->report_id = -1;
400 info->index = -1;
401 info->units = -1;
402 info->unit_expo = -1;
403
404 report_enum = &hdev->report_enum[type];
405 list_for_each_entry(report, &report_enum->report_list, list) {
406 for (i = 0; i < report->maxfield; ++i) {
407 field = report->field[i];
408 if (field->maxusage) {
409 if (field->physical == usage_id &&
410 (field->logical == attr_usage_id ||
411 field->usage[0].hid ==
412 attr_usage_id) &&
413 (field->usage[0].collection_index >=
414 hsdev->start_collection_index) &&
415 (field->usage[0].collection_index <
416 hsdev->end_collection_index)) {
417
418 sensor_hub_fill_attr_info(info, i,
419 report->id,
420 field);
421 ret = 0;
422 break;
423 }
424 }
425 }
426
427 }
428
429 return ret;
430}
431EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
432
433#ifdef CONFIG_PM
434static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
435{
436 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
437 struct hid_sensor_hub_callbacks_list *callback;
438 unsigned long flags;
439
440 hid_dbg(hdev, " sensor_hub_suspend\n");
441 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
442 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
443 if (callback->usage_callback->suspend)
444 callback->usage_callback->suspend(
445 callback->hsdev, callback->priv);
446 }
447 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
448
449 return 0;
450}
451
452static int sensor_hub_resume(struct hid_device *hdev)
453{
454 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
455 struct hid_sensor_hub_callbacks_list *callback;
456 unsigned long flags;
457
458 hid_dbg(hdev, " sensor_hub_resume\n");
459 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
460 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
461 if (callback->usage_callback->resume)
462 callback->usage_callback->resume(
463 callback->hsdev, callback->priv);
464 }
465 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
466
467 return 0;
468}
469
470static int sensor_hub_reset_resume(struct hid_device *hdev)
471{
472 return 0;
473}
474#endif
475
476/*
477 * Handle raw report as sent by device
478 */
479static int sensor_hub_raw_event(struct hid_device *hdev,
480 struct hid_report *report, u8 *raw_data, int size)
481{
482 int i;
483 u8 *ptr;
484 int sz;
485 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
486 unsigned long flags;
487 struct hid_sensor_hub_callbacks *callback = NULL;
488 struct hid_collection *collection = NULL;
489 void *priv = NULL;
490 struct hid_sensor_hub_device *hsdev = NULL;
491
492 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
493 report->id, size, report->type);
494 hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
495 if (report->type != HID_INPUT_REPORT)
496 return 1;
497
498 ptr = raw_data;
499 ptr++; /* Skip report id */
500
501 spin_lock_irqsave(&pdata->lock, flags);
502
503 for (i = 0; i < report->maxfield; ++i) {
504 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
505 i, report->field[i]->usage->collection_index,
506 report->field[i]->usage->hid,
507 (report->field[i]->report_size *
508 report->field[i]->report_count)/8);
509 sz = (report->field[i]->report_size *
510 report->field[i]->report_count)/8;
511 collection = &hdev->collection[
512 report->field[i]->usage->collection_index];
513 hid_dbg(hdev, "collection->usage %x\n",
514 collection->usage);
515
516 callback = sensor_hub_get_callback(hdev,
517 report->field[i]->physical,
518 report->field[i]->usage[0].collection_index,
519 &hsdev, &priv);
520 if (!callback) {
521 ptr += sz;
522 continue;
523 }
524 if (hsdev->pending.status && (hsdev->pending.attr_usage_id ==
525 report->field[i]->usage->hid ||
526 hsdev->pending.attr_usage_id ==
527 report->field[i]->logical)) {
528 hid_dbg(hdev, "data was pending ...\n");
529 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
530 if (hsdev->pending.raw_data)
531 hsdev->pending.raw_size = sz;
532 else
533 hsdev->pending.raw_size = 0;
534 complete(&hsdev->pending.ready);
535 }
536 if (callback->capture_sample) {
537 if (report->field[i]->logical)
538 callback->capture_sample(hsdev,
539 report->field[i]->logical, sz, ptr,
540 callback->pdev);
541 else
542 callback->capture_sample(hsdev,
543 report->field[i]->usage->hid, sz, ptr,
544 callback->pdev);
545 }
546 ptr += sz;
547 }
548 if (callback && collection && callback->send_event)
549 callback->send_event(hsdev, collection->usage,
550 callback->pdev);
551 spin_unlock_irqrestore(&pdata->lock, flags);
552
553 return 1;
554}
555
556int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
557{
558 int ret = 0;
559 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
560
561 mutex_lock(&data->mutex);
562 if (!data->ref_cnt) {
563 ret = hid_hw_open(hsdev->hdev);
564 if (ret) {
565 hid_err(hsdev->hdev, "failed to open hid device\n");
566 mutex_unlock(&data->mutex);
567 return ret;
568 }
569 }
570 data->ref_cnt++;
571 mutex_unlock(&data->mutex);
572
573 return ret;
574}
575EXPORT_SYMBOL_GPL(sensor_hub_device_open);
576
577void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
578{
579 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
580
581 mutex_lock(&data->mutex);
582 data->ref_cnt--;
583 if (!data->ref_cnt)
584 hid_hw_close(hsdev->hdev);
585 mutex_unlock(&data->mutex);
586}
587EXPORT_SYMBOL_GPL(sensor_hub_device_close);
588
589static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
590 unsigned int *rsize)
591{
592 /*
593 * Checks if the report descriptor of Thinkpad Helix 2 has a logical
594 * minimum for magnetic flux axis greater than the maximum.
595 */
596 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA &&
597 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 &&
598 rdesc[915] == 0x81 && rdesc[916] == 0x08 &&
599 rdesc[917] == 0x00 && rdesc[918] == 0x27 &&
600 rdesc[921] == 0x07 && rdesc[922] == 0x00) {
601 /* Sets negative logical minimum for mag x, y and z */
602 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0;
603 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e;
604 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7;
605 rdesc[917] = rdesc[938] = rdesc[959] = 0xff;
606 }
607
608 return rdesc;
609}
610
611static int sensor_hub_probe(struct hid_device *hdev,
612 const struct hid_device_id *id)
613{
614 int ret;
615 struct sensor_hub_data *sd;
616 int i;
617 char *name;
618 int dev_cnt;
619 struct hid_sensor_hub_device *hsdev;
620 struct hid_sensor_hub_device *last_hsdev = NULL;
621 struct hid_sensor_hub_device *collection_hsdev = NULL;
622
623 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
624 if (!sd) {
625 hid_err(hdev, "cannot allocate Sensor data\n");
626 return -ENOMEM;
627 }
628
629 hid_set_drvdata(hdev, sd);
630 sd->quirks = id->driver_data;
631
632 spin_lock_init(&sd->lock);
633 spin_lock_init(&sd->dyn_callback_lock);
634 mutex_init(&sd->mutex);
635 ret = hid_parse(hdev);
636 if (ret) {
637 hid_err(hdev, "parse failed\n");
638 return ret;
639 }
640 INIT_LIST_HEAD(&hdev->inputs);
641
642 ret = hid_hw_start(hdev, 0);
643 if (ret) {
644 hid_err(hdev, "hw start failed\n");
645 return ret;
646 }
647 INIT_LIST_HEAD(&sd->dyn_callback_list);
648 sd->hid_sensor_client_cnt = 0;
649
650 dev_cnt = sensor_hub_get_physical_device_count(hdev);
651 if (dev_cnt > HID_MAX_PHY_DEVICES) {
652 hid_err(hdev, "Invalid Physical device count\n");
653 ret = -EINVAL;
654 goto err_stop_hw;
655 }
656 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev,
657 dev_cnt,
658 sizeof(struct mfd_cell),
659 GFP_KERNEL);
660 if (sd->hid_sensor_hub_client_devs == NULL) {
661 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
662 ret = -ENOMEM;
663 goto err_stop_hw;
664 }
665
666 for (i = 0; i < hdev->maxcollection; ++i) {
667 struct hid_collection *collection = &hdev->collection[i];
668
669 if (collection->type == HID_COLLECTION_PHYSICAL ||
670 collection->type == HID_COLLECTION_APPLICATION) {
671
672 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev),
673 GFP_KERNEL);
674 if (!hsdev) {
675 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
676 ret = -ENOMEM;
677 goto err_stop_hw;
678 }
679 hsdev->hdev = hdev;
680 hsdev->vendor_id = hdev->vendor;
681 hsdev->product_id = hdev->product;
682 hsdev->usage = collection->usage;
683 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev,
684 sizeof(struct mutex),
685 GFP_KERNEL);
686 if (!hsdev->mutex_ptr) {
687 ret = -ENOMEM;
688 goto err_stop_hw;
689 }
690 mutex_init(hsdev->mutex_ptr);
691 hsdev->start_collection_index = i;
692 if (last_hsdev)
693 last_hsdev->end_collection_index = i;
694 last_hsdev = hsdev;
695 name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
696 "HID-SENSOR-%x",
697 collection->usage);
698 if (name == NULL) {
699 hid_err(hdev, "Failed MFD device name\n");
700 ret = -ENOMEM;
701 goto err_stop_hw;
702 }
703 sd->hid_sensor_hub_client_devs[
704 sd->hid_sensor_client_cnt].name = name;
705 sd->hid_sensor_hub_client_devs[
706 sd->hid_sensor_client_cnt].platform_data =
707 hsdev;
708 sd->hid_sensor_hub_client_devs[
709 sd->hid_sensor_client_cnt].pdata_size =
710 sizeof(*hsdev);
711 hid_dbg(hdev, "Adding %s:%d\n", name,
712 hsdev->start_collection_index);
713 sd->hid_sensor_client_cnt++;
714 if (collection_hsdev)
715 collection_hsdev->end_collection_index = i;
716 if (collection->type == HID_COLLECTION_APPLICATION &&
717 collection->usage == HID_USAGE_SENSOR_COLLECTION)
718 collection_hsdev = hsdev;
719 }
720 }
721 if (last_hsdev)
722 last_hsdev->end_collection_index = i;
723 if (collection_hsdev)
724 collection_hsdev->end_collection_index = i;
725
726 ret = mfd_add_hotplug_devices(&hdev->dev,
727 sd->hid_sensor_hub_client_devs,
728 sd->hid_sensor_client_cnt);
729 if (ret < 0)
730 goto err_stop_hw;
731
732 return ret;
733
734err_stop_hw:
735 hid_hw_stop(hdev);
736
737 return ret;
738}
739
740static void sensor_hub_remove(struct hid_device *hdev)
741{
742 struct sensor_hub_data *data = hid_get_drvdata(hdev);
743 unsigned long flags;
744 int i;
745
746 hid_dbg(hdev, " hardware removed\n");
747 hid_hw_close(hdev);
748 hid_hw_stop(hdev);
749 spin_lock_irqsave(&data->lock, flags);
750 for (i = 0; i < data->hid_sensor_client_cnt; ++i) {
751 struct hid_sensor_hub_device *hsdev =
752 data->hid_sensor_hub_client_devs[i].platform_data;
753 if (hsdev->pending.status)
754 complete(&hsdev->pending.ready);
755 }
756 spin_unlock_irqrestore(&data->lock, flags);
757 mfd_remove_devices(&hdev->dev);
758 hid_set_drvdata(hdev, NULL);
759 mutex_destroy(&data->mutex);
760}
761
762static const struct hid_device_id sensor_hub_devices[] = {
763 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
764 HID_ANY_ID) },
765 { }
766};
767MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
768
769static struct hid_driver sensor_hub_driver = {
770 .name = "hid-sensor-hub",
771 .id_table = sensor_hub_devices,
772 .probe = sensor_hub_probe,
773 .remove = sensor_hub_remove,
774 .raw_event = sensor_hub_raw_event,
775 .report_fixup = sensor_hub_report_fixup,
776#ifdef CONFIG_PM
777 .suspend = sensor_hub_suspend,
778 .resume = sensor_hub_resume,
779 .reset_resume = sensor_hub_reset_resume,
780#endif
781};
782module_hid_driver(sensor_hub_driver);
783
784MODULE_DESCRIPTION("HID Sensor Hub driver");
785MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
786MODULE_LICENSE("GPL");
787