Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/hid/hid-sensor-hub.c

  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  */
 40 struct 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  */
 61 struct 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  */
 80 struct 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 
 88 static 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 
102 static 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 
116 static 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 
129 static 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 
156 int 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 }
184 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
185 
186 int 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 }
204 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
205 
206 int 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 
223 done_proc:
224         mutex_unlock(&data->mutex);
225 
226         return ret;
227 }
228 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
229 
230 int 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 
248 done_proc:
249         mutex_unlock(&data->mutex);
250 
251         return ret;
252 }
253 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
254 
255 
256 int 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 
296 err_free:
297         data->pending.status = false;
298         mutex_unlock(&data->mutex);
299 
300         return ret_val;
301 }
302 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
303 
304 int 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 
321 done_proc:
322         return -EINVAL;
323 }
324 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
325 
326 int 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 }
374 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
375 
376 #ifdef CONFIG_PM
377 static 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 
394 static 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 
411 static 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  */
420 static 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 
492 int 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 }
511 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
512 
513 void 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 }
523 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
524 
525 static __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 
559 static 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 
663 err_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);
669 err_stop_hw:
670         hid_hw_stop(hdev);
671 
672         return ret;
673 }
674 
675 static 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 
698 static 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 };
718 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
719 
720 static 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 };
733 module_hid_driver(sensor_hub_driver);
734 
735 MODULE_DESCRIPTION("HID Sensor Hub driver");
736 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
737 MODULE_LICENSE("GPL");
738 

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