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md: drop null test before destroy functions
[linux-2.6/btrfs-unstable.git] / drivers / hid / hid-sensor-hub.c
bloba76eb2a0a987b33da708dbbaf581ef914901ffbd
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_data - Hold a instance data for a HID hub device
33 * @hsdev: Stored hid instance for current hub device.
34 * @mutex: Mutex to serialize synchronous request.
35 * @lock: Spin lock to protect pending request structure.
36 * @dyn_callback_list: Holds callback function
37 * @dyn_callback_lock: spin lock to protect callback list
38 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
39 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
40 * @ref_cnt: Number of MFD clients have opened this device
41 */
42 struct sensor_hub_data {
43 struct mutex mutex;
44 spinlock_t lock;
45 struct list_head dyn_callback_list;
46 spinlock_t dyn_callback_lock;
47 struct mfd_cell *hid_sensor_hub_client_devs;
48 int hid_sensor_client_cnt;
49 unsigned long quirks;
50 int ref_cnt;
51 };
52
53 /**
54 * struct hid_sensor_hub_callbacks_list - Stores callback list
55 * @list: list head.
56 * @usage_id: usage id for a physical device.
57 * @usage_callback: Stores registered callback functions.
58 * @priv: Private data for a physical device.
59 */
60 struct hid_sensor_hub_callbacks_list {
61 struct list_head list;
62 u32 usage_id;
63 struct hid_sensor_hub_device *hsdev;
64 struct hid_sensor_hub_callbacks *usage_callback;
65 void *priv;
66 };
67
68 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
69 int dir)
70 {
71 struct hid_report *report;
72
73 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
74 if (report->id == id)
75 return report;
76 }
77 hid_warn(hdev, "No report with id 0x%x found\n", id);
78
79 return NULL;
80 }
81
82 static int sensor_hub_get_physical_device_count(struct hid_device *hdev)
83 {
84 int i;
85 int count = 0;
86
87 for (i = 0; i < hdev->maxcollection; ++i) {
88 struct hid_collection *collection = &hdev->collection[i];
89 if (collection->type == HID_COLLECTION_PHYSICAL ||
90 collection->type == HID_COLLECTION_APPLICATION)
91 ++count;
92 }
93
94 return count;
95 }
96
97 static void sensor_hub_fill_attr_info(
98 struct hid_sensor_hub_attribute_info *info,
99 s32 index, s32 report_id, struct hid_field *field)
100 {
101 info->index = index;
102 info->report_id = report_id;
103 info->units = field->unit;
104 info->unit_expo = field->unit_exponent;
105 info->size = (field->report_size * field->report_count)/8;
106 info->logical_minimum = field->logical_minimum;
107 info->logical_maximum = field->logical_maximum;
108 }
109
110 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
111 struct hid_device *hdev,
112 u32 usage_id,
113 int collection_index,
114 struct hid_sensor_hub_device **hsdev,
115 void **priv)
116 {
117 struct hid_sensor_hub_callbacks_list *callback;
118 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
119 unsigned long flags;
120
121 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
122 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
123 if ((callback->usage_id == usage_id ||
124 callback->usage_id == HID_USAGE_SENSOR_COLLECTION) &&
125 (collection_index >=
126 callback->hsdev->start_collection_index) &&
127 (collection_index <
128 callback->hsdev->end_collection_index)) {
129 *priv = callback->priv;
130 *hsdev = callback->hsdev;
131 spin_unlock_irqrestore(&pdata->dyn_callback_lock,
132 flags);
133 return callback->usage_callback;
134 }
135 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
136
137 return NULL;
138 }
139
140 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
141 u32 usage_id,
142 struct hid_sensor_hub_callbacks *usage_callback)
143 {
144 struct hid_sensor_hub_callbacks_list *callback;
145 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
146 unsigned long flags;
147
148 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
149 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
150 if (callback->usage_id == usage_id &&
151 callback->hsdev == hsdev) {
152 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
153 return -EINVAL;
154 }
155 callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
156 if (!callback) {
157 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
158 return -ENOMEM;
159 }
160 callback->hsdev = hsdev;
161 callback->usage_callback = usage_callback;
162 callback->usage_id = usage_id;
163 callback->priv = NULL;
164 /*
165 * If there is a handler registered for the collection type, then
166 * it will handle all reports for sensors in this collection. If
167 * there is also an individual sensor handler registration, then
168 * we want to make sure that the reports are directed to collection
169 * handler, as this may be a fusion sensor. So add collection handlers
170 * to the beginning of the list, so that they are matched first.
171 */
172 if (usage_id == HID_USAGE_SENSOR_COLLECTION)
173 list_add(&callback->list, &pdata->dyn_callback_list);
174 else
175 list_add_tail(&callback->list, &pdata->dyn_callback_list);
176 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
177
178 return 0;
179 }
180 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
181
182 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
183 u32 usage_id)
184 {
185 struct hid_sensor_hub_callbacks_list *callback;
186 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
187 unsigned long flags;
188
189 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
190 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
191 if (callback->usage_id == usage_id &&
192 callback->hsdev == hsdev) {
193 list_del(&callback->list);
194 kfree(callback);
195 break;
196 }
197 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
198
199 return 0;
200 }
201 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
202
203 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
204 u32 field_index, int buffer_size, void *buffer)
205 {
206 struct hid_report *report;
207 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
208 __s32 *buf32 = buffer;
209 int i = 0;
210 int remaining_bytes;
211 __s32 value;
212 int ret = 0;
213
214 mutex_lock(&data->mutex);
215 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
216 if (!report || (field_index >= report->maxfield)) {
217 ret = -EINVAL;
218 goto done_proc;
219 }
220
221 remaining_bytes = do_div(buffer_size, sizeof(__s32));
222 if (buffer_size) {
223 for (i = 0; i < buffer_size; ++i) {
224 hid_set_field(report->field[field_index], i,
225 (__force __s32)cpu_to_le32(*buf32));
226 ++buf32;
227 }
228 }
229 if (remaining_bytes) {
230 value = 0;
231 memcpy(&value, (u8 *)buf32, remaining_bytes);
232 hid_set_field(report->field[field_index], i,
233 (__force __s32)cpu_to_le32(value));
234 }
235 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
236 hid_hw_wait(hsdev->hdev);
237
238 done_proc:
239 mutex_unlock(&data->mutex);
240
241 return ret;
242 }
243 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
244
245 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
246 u32 field_index, int buffer_size, void *buffer)
247 {
248 struct hid_report *report;
249 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
250 int report_size;
251 int ret = 0;
252
253 mutex_lock(&data->mutex);
254 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
255 if (!report || (field_index >= report->maxfield) ||
256 report->field[field_index]->report_count < 1) {
257 ret = -EINVAL;
258 goto done_proc;
259 }
260 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
261 hid_hw_wait(hsdev->hdev);
262
263 /* calculate number of bytes required to read this field */
264 report_size = DIV_ROUND_UP(report->field[field_index]->report_size,
265 8) *
266 report->field[field_index]->report_count;
267 if (!report_size) {
268 ret = -EINVAL;
269 goto done_proc;
270 }
271 ret = min(report_size, buffer_size);
272 memcpy(buffer, report->field[field_index]->value, ret);
273
274 done_proc:
275 mutex_unlock(&data->mutex);
276
277 return ret;
278 }
279 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
280
281
282 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
283 u32 usage_id,
284 u32 attr_usage_id, u32 report_id,
285 enum sensor_hub_read_flags flag)
286 {
287 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
288 unsigned long flags;
289 struct hid_report *report;
290 int ret_val = 0;
291
292 report = sensor_hub_report(report_id, hsdev->hdev,
293 HID_INPUT_REPORT);
294 if (!report)
295 return -EINVAL;
296
297 mutex_lock(hsdev->mutex_ptr);
298 if (flag == SENSOR_HUB_SYNC) {
299 memset(&hsdev->pending, 0, sizeof(hsdev->pending));
300 init_completion(&hsdev->pending.ready);
301 hsdev->pending.usage_id = usage_id;
302 hsdev->pending.attr_usage_id = attr_usage_id;
303 hsdev->pending.raw_size = 0;
304
305 spin_lock_irqsave(&data->lock, flags);
306 hsdev->pending.status = true;
307 spin_unlock_irqrestore(&data->lock, flags);
308 }
309 mutex_lock(&data->mutex);
310 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
311 mutex_unlock(&data->mutex);
312 if (flag == SENSOR_HUB_SYNC) {
313 wait_for_completion_interruptible_timeout(
314 &hsdev->pending.ready, HZ*5);
315 switch (hsdev->pending.raw_size) {
316 case 1:
317 ret_val = *(u8 *)hsdev->pending.raw_data;
318 break;
319 case 2:
320 ret_val = *(u16 *)hsdev->pending.raw_data;
321 break;
322 case 4:
323 ret_val = *(u32 *)hsdev->pending.raw_data;
324 break;
325 default:
326 ret_val = 0;
327 }
328 kfree(hsdev->pending.raw_data);
329 hsdev->pending.status = false;
330 }
331 mutex_unlock(hsdev->mutex_ptr);
332
333 return ret_val;
334 }
335 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
336
337 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
338 u32 report_id, int field_index, u32 usage_id)
339 {
340 struct hid_report *report;
341 struct hid_field *field;
342 int i;
343
344 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
345 if (!report || (field_index >= report->maxfield))
346 goto done_proc;
347
348 field = report->field[field_index];
349 for (i = 0; i < field->maxusage; ++i) {
350 if (field->usage[i].hid == usage_id)
351 return field->usage[i].usage_index;
352 }
353
354 done_proc:
355 return -EINVAL;
356 }
357 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
358
359 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
360 u8 type,
361 u32 usage_id,
362 u32 attr_usage_id,
363 struct hid_sensor_hub_attribute_info *info)
364 {
365 int ret = -1;
366 int i;
367 struct hid_report *report;
368 struct hid_field *field;
369 struct hid_report_enum *report_enum;
370 struct hid_device *hdev = hsdev->hdev;
371
372 /* Initialize with defaults */
373 info->usage_id = usage_id;
374 info->attrib_id = attr_usage_id;
375 info->report_id = -1;
376 info->index = -1;
377 info->units = -1;
378 info->unit_expo = -1;
379
380 report_enum = &hdev->report_enum[type];
381 list_for_each_entry(report, &report_enum->report_list, list) {
382 for (i = 0; i < report->maxfield; ++i) {
383 field = report->field[i];
384 if (field->maxusage) {
385 if (field->physical == usage_id &&
386 (field->logical == attr_usage_id ||
387 field->usage[0].hid ==
388 attr_usage_id) &&
389 (field->usage[0].collection_index >=
390 hsdev->start_collection_index) &&
391 (field->usage[0].collection_index <
392 hsdev->end_collection_index)) {
393
394 sensor_hub_fill_attr_info(info, i,
395 report->id,
396 field);
397 ret = 0;
398 break;
399 }
400 }
401 }
402
403 }
404
405 return ret;
406 }
407 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
408
409 #ifdef CONFIG_PM
410 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
411 {
412 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
413 struct hid_sensor_hub_callbacks_list *callback;
414 unsigned long flags;
415
416 hid_dbg(hdev, " sensor_hub_suspend\n");
417 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
418 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
419 if (callback->usage_callback->suspend)
420 callback->usage_callback->suspend(
421 callback->hsdev, callback->priv);
422 }
423 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
424
425 return 0;
426 }
427
428 static int sensor_hub_resume(struct hid_device *hdev)
429 {
430 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
431 struct hid_sensor_hub_callbacks_list *callback;
432 unsigned long flags;
433
434 hid_dbg(hdev, " sensor_hub_resume\n");
435 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
436 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
437 if (callback->usage_callback->resume)
438 callback->usage_callback->resume(
439 callback->hsdev, callback->priv);
440 }
441 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
442
443 return 0;
444 }
445
446 static int sensor_hub_reset_resume(struct hid_device *hdev)
447 {
448 return 0;
449 }
450 #endif
451
452 /*
453 * Handle raw report as sent by device
454 */
455 static int sensor_hub_raw_event(struct hid_device *hdev,
456 struct hid_report *report, u8 *raw_data, int size)
457 {
458 int i;
459 u8 *ptr;
460 int sz;
461 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
462 unsigned long flags;
463 struct hid_sensor_hub_callbacks *callback = NULL;
464 struct hid_collection *collection = NULL;
465 void *priv = NULL;
466 struct hid_sensor_hub_device *hsdev = NULL;
467
468 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
469 report->id, size, report->type);
470 hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
471 if (report->type != HID_INPUT_REPORT)
472 return 1;
473
474 ptr = raw_data;
475 ptr++; /* Skip report id */
476
477 spin_lock_irqsave(&pdata->lock, flags);
478
479 for (i = 0; i < report->maxfield; ++i) {
480 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
481 i, report->field[i]->usage->collection_index,
482 report->field[i]->usage->hid,
483 (report->field[i]->report_size *
484 report->field[i]->report_count)/8);
485 sz = (report->field[i]->report_size *
486 report->field[i]->report_count)/8;
487 collection = &hdev->collection[
488 report->field[i]->usage->collection_index];
489 hid_dbg(hdev, "collection->usage %x\n",
490 collection->usage);
491
492 callback = sensor_hub_get_callback(hdev,
493 report->field[i]->physical,
494 report->field[i]->usage[0].collection_index,
495 &hsdev, &priv);
496 if (!callback) {
497 ptr += sz;
498 continue;
499 }
500 if (hsdev->pending.status && (hsdev->pending.attr_usage_id ==
501 report->field[i]->usage->hid ||
502 hsdev->pending.attr_usage_id ==
503 report->field[i]->logical)) {
504 hid_dbg(hdev, "data was pending ...\n");
505 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
506 if (hsdev->pending.raw_data)
507 hsdev->pending.raw_size = sz;
508 else
509 hsdev->pending.raw_size = 0;
510 complete(&hsdev->pending.ready);
511 }
512 if (callback->capture_sample) {
513 if (report->field[i]->logical)
514 callback->capture_sample(hsdev,
515 report->field[i]->logical, sz, ptr,
516 callback->pdev);
517 else
518 callback->capture_sample(hsdev,
519 report->field[i]->usage->hid, sz, ptr,
520 callback->pdev);
521 }
522 ptr += sz;
523 }
524 if (callback && collection && callback->send_event)
525 callback->send_event(hsdev, collection->usage,
526 callback->pdev);
527 spin_unlock_irqrestore(&pdata->lock, flags);
528
529 return 1;
530 }
531
532 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
533 {
534 int ret = 0;
535 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
536
537 mutex_lock(&data->mutex);
538 if (!data->ref_cnt) {
539 ret = hid_hw_open(hsdev->hdev);
540 if (ret) {
541 hid_err(hsdev->hdev, "failed to open hid device\n");
542 mutex_unlock(&data->mutex);
543 return ret;
544 }
545 }
546 data->ref_cnt++;
547 mutex_unlock(&data->mutex);
548
549 return ret;
550 }
551 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
552
553 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
554 {
555 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
556
557 mutex_lock(&data->mutex);
558 data->ref_cnt--;
559 if (!data->ref_cnt)
560 hid_hw_close(hsdev->hdev);
561 mutex_unlock(&data->mutex);
562 }
563 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
564
565 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
566 unsigned int *rsize)
567 {
568 int index;
569 struct sensor_hub_data *sd = hid_get_drvdata(hdev);
570 unsigned char report_block[] = {
571 0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
572 unsigned char power_block[] = {
573 0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
574
575 if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
576 hid_dbg(hdev, "No Enum quirks\n");
577 return rdesc;
578 }
579
580 /* Looks for power and report state usage id and force to 1 */
581 for (index = 0; index < *rsize; ++index) {
582 if (((*rsize - index) > sizeof(report_block)) &&
583 !memcmp(&rdesc[index], report_block,
584 sizeof(report_block))) {
585 rdesc[index + 4] = 0x01;
586 index += sizeof(report_block);
587 }
588 if (((*rsize - index) > sizeof(power_block)) &&
589 !memcmp(&rdesc[index], power_block,
590 sizeof(power_block))) {
591 rdesc[index + 4] = 0x01;
592 index += sizeof(power_block);
593 }
594 }
595
596 return rdesc;
597 }
598
599 static int sensor_hub_probe(struct hid_device *hdev,
600 const struct hid_device_id *id)
601 {
602 int ret;
603 struct sensor_hub_data *sd;
604 int i;
605 char *name;
606 int dev_cnt;
607 struct hid_sensor_hub_device *hsdev;
608 struct hid_sensor_hub_device *last_hsdev = NULL;
609 struct hid_sensor_hub_device *collection_hsdev = NULL;
610
611 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
612 if (!sd) {
613 hid_err(hdev, "cannot allocate Sensor data\n");
614 return -ENOMEM;
615 }
616
617 hid_set_drvdata(hdev, sd);
618 sd->quirks = id->driver_data;
619
620 spin_lock_init(&sd->lock);
621 spin_lock_init(&sd->dyn_callback_lock);
622 mutex_init(&sd->mutex);
623 ret = hid_parse(hdev);
624 if (ret) {
625 hid_err(hdev, "parse failed\n");
626 return ret;
627 }
628 INIT_LIST_HEAD(&hdev->inputs);
629
630 ret = hid_hw_start(hdev, 0);
631 if (ret) {
632 hid_err(hdev, "hw start failed\n");
633 return ret;
634 }
635 INIT_LIST_HEAD(&sd->dyn_callback_list);
636 sd->hid_sensor_client_cnt = 0;
637
638 dev_cnt = sensor_hub_get_physical_device_count(hdev);
639 if (dev_cnt > HID_MAX_PHY_DEVICES) {
640 hid_err(hdev, "Invalid Physical device count\n");
641 ret = -EINVAL;
642 goto err_stop_hw;
643 }
644 sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt *
645 sizeof(struct mfd_cell),
646 GFP_KERNEL);
647 if (sd->hid_sensor_hub_client_devs == NULL) {
648 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
649 ret = -ENOMEM;
650 goto err_stop_hw;
651 }
652
653 for (i = 0; i < hdev->maxcollection; ++i) {
654 struct hid_collection *collection = &hdev->collection[i];
655
656 if (collection->type == HID_COLLECTION_PHYSICAL ||
657 collection->type == HID_COLLECTION_APPLICATION) {
658
659 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev),
660 GFP_KERNEL);
661 if (!hsdev) {
662 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
663 ret = -ENOMEM;
664 goto err_stop_hw;
665 }
666 hsdev->hdev = hdev;
667 hsdev->vendor_id = hdev->vendor;
668 hsdev->product_id = hdev->product;
669 hsdev->usage = collection->usage;
670 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev,
671 sizeof(struct mutex),
672 GFP_KERNEL);
673 if (!hsdev->mutex_ptr) {
674 ret = -ENOMEM;
675 goto err_stop_hw;
676 }
677 mutex_init(hsdev->mutex_ptr);
678 hsdev->start_collection_index = i;
679 if (last_hsdev)
680 last_hsdev->end_collection_index = i;
681 last_hsdev = hsdev;
682 name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
683 "HID-SENSOR-%x",
684 collection->usage);
685 if (name == NULL) {
686 hid_err(hdev, "Failed MFD device name\n");
687 ret = -ENOMEM;
688 goto err_stop_hw;
689 }
690 sd->hid_sensor_hub_client_devs[
691 sd->hid_sensor_client_cnt].name = name;
692 sd->hid_sensor_hub_client_devs[
693 sd->hid_sensor_client_cnt].platform_data =
694 hsdev;
695 sd->hid_sensor_hub_client_devs[
696 sd->hid_sensor_client_cnt].pdata_size =
697 sizeof(*hsdev);
698 hid_dbg(hdev, "Adding %s:%d\n", name,
699 hsdev->start_collection_index);
700 sd->hid_sensor_client_cnt++;
701 if (collection_hsdev)
702 collection_hsdev->end_collection_index = i;
703 if (collection->type == HID_COLLECTION_APPLICATION &&
704 collection->usage == HID_USAGE_SENSOR_COLLECTION)
705 collection_hsdev = hsdev;
706 }
707 }
708 if (last_hsdev)
709 last_hsdev->end_collection_index = i;
710 if (collection_hsdev)
711 collection_hsdev->end_collection_index = i;
712
713 ret = mfd_add_hotplug_devices(&hdev->dev,
714 sd->hid_sensor_hub_client_devs,
715 sd->hid_sensor_client_cnt);
716 if (ret < 0)
717 goto err_stop_hw;
718
719 return ret;
720
721 err_stop_hw:
722 hid_hw_stop(hdev);
723
724 return ret;
725 }
726
727 static void sensor_hub_remove(struct hid_device *hdev)
728 {
729 struct sensor_hub_data *data = hid_get_drvdata(hdev);
730 unsigned long flags;
731 int i;
732
733 hid_dbg(hdev, " hardware removed\n");
734 hid_hw_close(hdev);
735 hid_hw_stop(hdev);
736 spin_lock_irqsave(&data->lock, flags);
737 for (i = 0; i < data->hid_sensor_client_cnt; ++i) {
738 struct hid_sensor_hub_device *hsdev =
739 data->hid_sensor_hub_client_devs[i].platform_data;
740 if (hsdev->pending.status)
741 complete(&hsdev->pending.ready);
742 }
743 spin_unlock_irqrestore(&data->lock, flags);
744 mfd_remove_devices(&hdev->dev);
745 hid_set_drvdata(hdev, NULL);
746 mutex_destroy(&data->mutex);
747 }
748
749 static const struct hid_device_id sensor_hub_devices[] = {
750 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
751 USB_DEVICE_ID_INTEL_HID_SENSOR_0),
752 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
753 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
754 USB_DEVICE_ID_INTEL_HID_SENSOR_0),
755 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
756 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
757 USB_DEVICE_ID_INTEL_HID_SENSOR_1),
758 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
759 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
760 USB_DEVICE_ID_MS_SURFACE_PRO_2),
761 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
762 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
763 USB_DEVICE_ID_MS_TOUCH_COVER_2),
764 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
765 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
766 USB_DEVICE_ID_MS_TYPE_COVER_2),
767 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
768 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
769 USB_DEVICE_ID_STM_HID_SENSOR),
770 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
771 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
772 USB_DEVICE_ID_STM_HID_SENSOR_1),
773 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
774 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS,
775 USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA),
776 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
777 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE,
778 USB_DEVICE_ID_ITE_LENOVO_YOGA),
779 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
780 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
781 HID_ANY_ID) },
782 { }
783 };
784 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
785
786 static struct hid_driver sensor_hub_driver = {
787 .name = "hid-sensor-hub",
788 .id_table = sensor_hub_devices,
789 .probe = sensor_hub_probe,
790 .remove = sensor_hub_remove,
791 .raw_event = sensor_hub_raw_event,
792 .report_fixup = sensor_hub_report_fixup,
793 #ifdef CONFIG_PM
794 .suspend = sensor_hub_suspend,
795 .resume = sensor_hub_resume,
796 .reset_resume = sensor_hub_reset_resume,
797 #endif
798 };
799 module_hid_driver(sensor_hub_driver);
800
801 MODULE_DESCRIPTION("HID Sensor Hub driver");
802 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
803 MODULE_LICENSE("GPL");
(deprecated) Btrfs devel tree