Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 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

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  */
 60 struct sensor_hub_data {
 61         struct hid_sensor_hub_device *hsdev;
 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 };
 71 
 72 /**
 73  * struct hid_sensor_hub_callbacks_list - Stores callback list
 74  * @list:               list head.
 75  * @usage_id:           usage id for a physical device.
 76  * @usage_callback:     Stores registered callback functions.
 77  * @priv:               Private data for a physical device.
 78  */
 79 struct hid_sensor_hub_callbacks_list {
 80         struct list_head list;
 81         u32 usage_id;
 82         struct hid_sensor_hub_callbacks *usage_callback;
 83         void *priv;
 84 };
 85 
 86 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
 87                                                 int dir)
 88 {
 89         struct hid_report *report;
 90 
 91         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
 92                 if (report->id == id)
 93                         return report;
 94         }
 95         hid_warn(hdev, "No report with id 0x%x found\n", id);
 96 
 97         return NULL;
 98 }
 99 
100 static int sensor_hub_get_physical_device_count(
101                                 struct hid_report_enum *report_enum)
102 {
103         struct hid_report *report;
104         struct hid_field *field;
105         int cnt = 0;
106 
107         list_for_each_entry(report, &report_enum->report_list, list) {
108                 field = report->field[0];
109                 if (report->maxfield && field && field->physical)
110                         cnt++;
111         }
112 
113         return cnt;
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, void **priv)
132 {
133         struct hid_sensor_hub_callbacks_list *callback;
134         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
135 
136         spin_lock(&pdata->dyn_callback_lock);
137         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
138                 if (callback->usage_id == usage_id) {
139                         *priv = callback->priv;
140                         spin_unlock(&pdata->dyn_callback_lock);
141                         return callback->usage_callback;
142                 }
143         spin_unlock(&pdata->dyn_callback_lock);
144 
145         return NULL;
146 }
147 
148 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
149                         u32 usage_id,
150                         struct hid_sensor_hub_callbacks *usage_callback)
151 {
152         struct hid_sensor_hub_callbacks_list *callback;
153         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
154 
155         spin_lock(&pdata->dyn_callback_lock);
156         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
157                 if (callback->usage_id == usage_id) {
158                         spin_unlock(&pdata->dyn_callback_lock);
159                         return -EINVAL;
160                 }
161         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
162         if (!callback) {
163                 spin_unlock(&pdata->dyn_callback_lock);
164                 return -ENOMEM;
165         }
166         callback->usage_callback = usage_callback;
167         callback->usage_id = usage_id;
168         callback->priv = NULL;
169         list_add_tail(&callback->list, &pdata->dyn_callback_list);
170         spin_unlock(&pdata->dyn_callback_lock);
171 
172         return 0;
173 }
174 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
175 
176 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
177                                 u32 usage_id)
178 {
179         struct hid_sensor_hub_callbacks_list *callback;
180         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
181 
182         spin_lock(&pdata->dyn_callback_lock);
183         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
184                 if (callback->usage_id == usage_id) {
185                         list_del(&callback->list);
186                         kfree(callback);
187                         break;
188                 }
189         spin_unlock(&pdata->dyn_callback_lock);
190 
191         return 0;
192 }
193 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
194 
195 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
196                                 u32 field_index, s32 value)
197 {
198         struct hid_report *report;
199         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
200         int ret = 0;
201 
202         mutex_lock(&data->mutex);
203         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
204         if (!report || (field_index >= report->maxfield)) {
205                 ret = -EINVAL;
206                 goto done_proc;
207         }
208         hid_set_field(report->field[field_index], 0, value);
209         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
210         hid_hw_wait(hsdev->hdev);
211 
212 done_proc:
213         mutex_unlock(&data->mutex);
214 
215         return ret;
216 }
217 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
218 
219 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
220                                 u32 field_index, s32 *value)
221 {
222         struct hid_report *report;
223         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
224         int ret = 0;
225 
226         mutex_lock(&data->mutex);
227         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
228         if (!report || (field_index >= report->maxfield) ||
229             report->field[field_index]->report_count < 1) {
230                 ret = -EINVAL;
231                 goto done_proc;
232         }
233         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
234         hid_hw_wait(hsdev->hdev);
235         *value = report->field[field_index]->value[0];
236 
237 done_proc:
238         mutex_unlock(&data->mutex);
239 
240         return ret;
241 }
242 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
243 
244 
245 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
246                                         u32 usage_id,
247                                         u32 attr_usage_id, u32 report_id)
248 {
249         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
250         unsigned long flags;
251         struct hid_report *report;
252         int ret_val = 0;
253 
254         mutex_lock(&data->mutex);
255         memset(&data->pending, 0, sizeof(data->pending));
256         init_completion(&data->pending.ready);
257         data->pending.usage_id = usage_id;
258         data->pending.attr_usage_id = attr_usage_id;
259         data->pending.raw_size = 0;
260 
261         spin_lock_irqsave(&data->lock, flags);
262         data->pending.status = true;
263         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
264         if (!report) {
265                 spin_unlock_irqrestore(&data->lock, flags);
266                 goto err_free;
267         }
268         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
269         spin_unlock_irqrestore(&data->lock, flags);
270         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
271         switch (data->pending.raw_size) {
272         case 1:
273                 ret_val = *(u8 *)data->pending.raw_data;
274                 break;
275         case 2:
276                 ret_val = *(u16 *)data->pending.raw_data;
277                 break;
278         case 4:
279                 ret_val = *(u32 *)data->pending.raw_data;
280                 break;
281         default:
282                 ret_val = 0;
283         }
284         kfree(data->pending.raw_data);
285 
286 err_free:
287         data->pending.status = false;
288         mutex_unlock(&data->mutex);
289 
290         return ret_val;
291 }
292 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
293 
294 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
295                                 u8 type,
296                                 u32 usage_id,
297                                 u32 attr_usage_id,
298                                 struct hid_sensor_hub_attribute_info *info)
299 {
300         int ret = -1;
301         int i, j;
302         int collection_index = -1;
303         struct hid_report *report;
304         struct hid_field *field;
305         struct hid_report_enum *report_enum;
306         struct hid_device *hdev = hsdev->hdev;
307 
308         /* Initialize with defaults */
309         info->usage_id = usage_id;
310         info->attrib_id = attr_usage_id;
311         info->report_id = -1;
312         info->index = -1;
313         info->units = -1;
314         info->unit_expo = -1;
315 
316         for (i = 0; i < hdev->maxcollection; ++i) {
317                 struct hid_collection *collection = &hdev->collection[i];
318                 if (usage_id == collection->usage) {
319                         collection_index = i;
320                         break;
321                 }
322         }
323         if (collection_index == -1)
324                 goto err_ret;
325 
326         report_enum = &hdev->report_enum[type];
327         list_for_each_entry(report, &report_enum->report_list, list) {
328                 for (i = 0; i < report->maxfield; ++i) {
329                         field = report->field[i];
330                         if (field->physical == usage_id &&
331                                 field->logical == attr_usage_id) {
332                                 sensor_hub_fill_attr_info(info, i, report->id,
333                                                           field);
334                                 ret = 0;
335                         } else {
336                                 for (j = 0; j < field->maxusage; ++j) {
337                                         if (field->usage[j].hid ==
338                                         attr_usage_id &&
339                                         field->usage[j].collection_index ==
340                                         collection_index) {
341                                                 sensor_hub_fill_attr_info(info,
342                                                           i, report->id, field);
343                                                 ret = 0;
344                                                 break;
345                                         }
346                                 }
347                         }
348                         if (ret == 0)
349                                 break;
350                 }
351         }
352 
353 err_ret:
354         return ret;
355 }
356 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
357 
358 #ifdef CONFIG_PM
359 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
360 {
361         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
362         struct hid_sensor_hub_callbacks_list *callback;
363 
364         hid_dbg(hdev, " sensor_hub_suspend\n");
365         spin_lock(&pdata->dyn_callback_lock);
366         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
367                 if (callback->usage_callback->suspend)
368                         callback->usage_callback->suspend(
369                                         pdata->hsdev, callback->priv);
370         }
371         spin_unlock(&pdata->dyn_callback_lock);
372 
373         return 0;
374 }
375 
376 static int sensor_hub_resume(struct hid_device *hdev)
377 {
378         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
379         struct hid_sensor_hub_callbacks_list *callback;
380 
381         hid_dbg(hdev, " sensor_hub_resume\n");
382         spin_lock(&pdata->dyn_callback_lock);
383         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
384                 if (callback->usage_callback->resume)
385                         callback->usage_callback->resume(
386                                         pdata->hsdev, callback->priv);
387         }
388         spin_unlock(&pdata->dyn_callback_lock);
389 
390         return 0;
391 }
392 
393 static int sensor_hub_reset_resume(struct hid_device *hdev)
394 {
395         return 0;
396 }
397 #endif
398 
399 /*
400  * Handle raw report as sent by device
401  */
402 static int sensor_hub_raw_event(struct hid_device *hdev,
403                 struct hid_report *report, u8 *raw_data, int size)
404 {
405         int i;
406         u8 *ptr;
407         int sz;
408         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
409         unsigned long flags;
410         struct hid_sensor_hub_callbacks *callback = NULL;
411         struct hid_collection *collection = NULL;
412         void *priv = NULL;
413 
414         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
415                          report->id, size, report->type);
416         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
417         if (report->type != HID_INPUT_REPORT)
418                 return 1;
419 
420         ptr = raw_data;
421         ptr++; /* Skip report id */
422 
423         spin_lock_irqsave(&pdata->lock, flags);
424 
425         for (i = 0; i < report->maxfield; ++i) {
426                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
427                                 i, report->field[i]->usage->collection_index,
428                                 report->field[i]->usage->hid,
429                                 (report->field[i]->report_size *
430                                         report->field[i]->report_count)/8);
431                 sz = (report->field[i]->report_size *
432                                         report->field[i]->report_count)/8;
433                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
434                                 report->field[i]->usage->hid) {
435                         hid_dbg(hdev, "data was pending ...\n");
436                         pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
437                         if (pdata->pending.raw_data)
438                                 pdata->pending.raw_size = sz;
439                         else
440                                 pdata->pending.raw_size = 0;
441                         complete(&pdata->pending.ready);
442                 }
443                 collection = &hdev->collection[
444                                 report->field[i]->usage->collection_index];
445                 hid_dbg(hdev, "collection->usage %x\n",
446                                         collection->usage);
447                 callback = sensor_hub_get_callback(pdata->hsdev->hdev,
448                                                 report->field[i]->physical,
449                                                         &priv);
450                 if (callback && callback->capture_sample) {
451                         if (report->field[i]->logical)
452                                 callback->capture_sample(pdata->hsdev,
453                                         report->field[i]->logical, sz, ptr,
454                                         callback->pdev);
455                         else
456                                 callback->capture_sample(pdata->hsdev,
457                                         report->field[i]->usage->hid, sz, ptr,
458                                         callback->pdev);
459                 }
460                 ptr += sz;
461         }
462         if (callback && collection && callback->send_event)
463                 callback->send_event(pdata->hsdev, collection->usage,
464                                 callback->pdev);
465         spin_unlock_irqrestore(&pdata->lock, flags);
466 
467         return 1;
468 }
469 
470 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
471 {
472         int ret = 0;
473         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
474 
475         mutex_lock(&data->mutex);
476         if (!hsdev->ref_cnt) {
477                 ret = hid_hw_open(hsdev->hdev);
478                 if (ret) {
479                         hid_err(hsdev->hdev, "failed to open hid device\n");
480                         mutex_unlock(&data->mutex);
481                         return ret;
482                 }
483         }
484         hsdev->ref_cnt++;
485         mutex_unlock(&data->mutex);
486 
487         return ret;
488 }
489 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
490 
491 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
492 {
493         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
494 
495         mutex_lock(&data->mutex);
496         hsdev->ref_cnt--;
497         if (!hsdev->ref_cnt)
498                 hid_hw_close(hsdev->hdev);
499         mutex_unlock(&data->mutex);
500 }
501 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
502 
503 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
504                 unsigned int *rsize)
505 {
506         int index;
507         struct sensor_hub_data *sd =  hid_get_drvdata(hdev);
508         unsigned char report_block[] = {
509                                 0x0a,  0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
510         unsigned char power_block[] = {
511                                 0x0a,  0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
512 
513         if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
514                 hid_dbg(hdev, "No Enum quirks\n");
515                 return rdesc;
516         }
517 
518         /* Looks for power and report state usage id and force to 1 */
519         for (index = 0; index < *rsize; ++index) {
520                 if (((*rsize - index) > sizeof(report_block)) &&
521                         !memcmp(&rdesc[index], report_block,
522                                                 sizeof(report_block))) {
523                         rdesc[index + 4] = 0x01;
524                         index += sizeof(report_block);
525                 }
526                 if (((*rsize - index) > sizeof(power_block)) &&
527                         !memcmp(&rdesc[index], power_block,
528                                                 sizeof(power_block))) {
529                         rdesc[index + 4] = 0x01;
530                         index += sizeof(power_block);
531                 }
532         }
533 
534         return rdesc;
535 }
536 
537 static int sensor_hub_probe(struct hid_device *hdev,
538                                 const struct hid_device_id *id)
539 {
540         int ret;
541         struct sensor_hub_data *sd;
542         int i;
543         char *name;
544         struct hid_report *report;
545         struct hid_report_enum *report_enum;
546         struct hid_field *field;
547         int dev_cnt;
548 
549         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
550         if (!sd) {
551                 hid_err(hdev, "cannot allocate Sensor data\n");
552                 return -ENOMEM;
553         }
554         sd->hsdev = devm_kzalloc(&hdev->dev, sizeof(*sd->hsdev), GFP_KERNEL);
555         if (!sd->hsdev) {
556                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
557                 return -ENOMEM;
558         }
559         hid_set_drvdata(hdev, sd);
560         sd->quirks = id->driver_data;
561         sd->hsdev->hdev = hdev;
562         sd->hsdev->vendor_id = hdev->vendor;
563         sd->hsdev->product_id = hdev->product;
564         spin_lock_init(&sd->lock);
565         spin_lock_init(&sd->dyn_callback_lock);
566         mutex_init(&sd->mutex);
567         ret = hid_parse(hdev);
568         if (ret) {
569                 hid_err(hdev, "parse failed\n");
570                 return ret;
571         }
572         INIT_LIST_HEAD(&hdev->inputs);
573 
574         ret = hid_hw_start(hdev, 0);
575         if (ret) {
576                 hid_err(hdev, "hw start failed\n");
577                 return ret;
578         }
579         INIT_LIST_HEAD(&sd->dyn_callback_list);
580         sd->hid_sensor_client_cnt = 0;
581         report_enum = &hdev->report_enum[HID_INPUT_REPORT];
582 
583         dev_cnt = sensor_hub_get_physical_device_count(report_enum);
584         if (dev_cnt > HID_MAX_PHY_DEVICES) {
585                 hid_err(hdev, "Invalid Physical device count\n");
586                 ret = -EINVAL;
587                 goto err_stop_hw;
588         }
589         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
590                                                 sizeof(struct mfd_cell),
591                                                 GFP_KERNEL);
592         if (sd->hid_sensor_hub_client_devs == NULL) {
593                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
594                         ret = -ENOMEM;
595                         goto err_stop_hw;
596         }
597         list_for_each_entry(report, &report_enum->report_list, list) {
598                 hid_dbg(hdev, "Report id:%x\n", report->id);
599                 field = report->field[0];
600                 if (report->maxfield && field &&
601                                         field->physical) {
602                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
603                                                 field->physical);
604                         if (name == NULL) {
605                                 hid_err(hdev, "Failed MFD device name\n");
606                                         ret = -ENOMEM;
607                                         goto err_free_names;
608                         }
609                         sd->hid_sensor_hub_client_devs[
610                                 sd->hid_sensor_client_cnt].id = PLATFORM_DEVID_AUTO;
611                         sd->hid_sensor_hub_client_devs[
612                                 sd->hid_sensor_client_cnt].name = name;
613                         sd->hid_sensor_hub_client_devs[
614                                 sd->hid_sensor_client_cnt].platform_data =
615                                                 sd->hsdev;
616                         sd->hid_sensor_hub_client_devs[
617                                 sd->hid_sensor_client_cnt].pdata_size =
618                                                 sizeof(*sd->hsdev);
619                         hid_dbg(hdev, "Adding %s:%p\n", name, sd);
620                         sd->hid_sensor_client_cnt++;
621                 }
622         }
623         ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
624                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
625         if (ret < 0)
626                 goto err_free_names;
627 
628         return ret;
629 
630 err_free_names:
631         for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
632                 kfree(sd->hid_sensor_hub_client_devs[i].name);
633         kfree(sd->hid_sensor_hub_client_devs);
634 err_stop_hw:
635         hid_hw_stop(hdev);
636 
637         return ret;
638 }
639 
640 static void sensor_hub_remove(struct hid_device *hdev)
641 {
642         struct sensor_hub_data *data = hid_get_drvdata(hdev);
643         unsigned long flags;
644         int i;
645 
646         hid_dbg(hdev, " hardware removed\n");
647         hid_hw_close(hdev);
648         hid_hw_stop(hdev);
649         spin_lock_irqsave(&data->lock, flags);
650         if (data->pending.status)
651                 complete(&data->pending.ready);
652         spin_unlock_irqrestore(&data->lock, flags);
653         mfd_remove_devices(&hdev->dev);
654         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
655                 kfree(data->hid_sensor_hub_client_devs[i].name);
656         kfree(data->hid_sensor_hub_client_devs);
657         hid_set_drvdata(hdev, NULL);
658         mutex_destroy(&data->mutex);
659 }
660 
661 static const struct hid_device_id sensor_hub_devices[] = {
662         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
663                         USB_DEVICE_ID_INTEL_HID_SENSOR),
664                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
665         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
666                         USB_DEVICE_ID_INTEL_HID_SENSOR),
667                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
668         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
669                         USB_DEVICE_ID_STM_HID_SENSOR),
670                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
671         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
672                      HID_ANY_ID) },
673         { }
674 };
675 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
676 
677 static struct hid_driver sensor_hub_driver = {
678         .name = "hid-sensor-hub",
679         .id_table = sensor_hub_devices,
680         .probe = sensor_hub_probe,
681         .remove = sensor_hub_remove,
682         .raw_event = sensor_hub_raw_event,
683         .report_fixup = sensor_hub_report_fixup,
684 #ifdef CONFIG_PM
685         .suspend = sensor_hub_suspend,
686         .resume = sensor_hub_resume,
687         .reset_resume = sensor_hub_reset_resume,
688 #endif
689 };
690 module_hid_driver(sensor_hub_driver);
691 
692 MODULE_DESCRIPTION("HID Sensor Hub driver");
693 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
694 MODULE_LICENSE("GPL");
695 

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