Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

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         unsigned long flags;
139 
140         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
141         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
142                 if (callback->usage_id == usage_id &&
143                         (collection_index >=
144                                 callback->hsdev->start_collection_index) &&
145                         (collection_index <
146                                 callback->hsdev->end_collection_index)) {
147                         *priv = callback->priv;
148                         *hsdev = callback->hsdev;
149                         spin_unlock_irqrestore(&pdata->dyn_callback_lock,
150                                                flags);
151                         return callback->usage_callback;
152                 }
153         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
154 
155         return NULL;
156 }
157 
158 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
159                         u32 usage_id,
160                         struct hid_sensor_hub_callbacks *usage_callback)
161 {
162         struct hid_sensor_hub_callbacks_list *callback;
163         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
164         unsigned long flags;
165 
166         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
167         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
168                 if (callback->usage_id == usage_id &&
169                                                 callback->hsdev == hsdev) {
170                         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
171                         return -EINVAL;
172                 }
173         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
174         if (!callback) {
175                 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
176                 return -ENOMEM;
177         }
178         callback->hsdev = hsdev;
179         callback->usage_callback = usage_callback;
180         callback->usage_id = usage_id;
181         callback->priv = NULL;
182         list_add_tail(&callback->list, &pdata->dyn_callback_list);
183         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
184 
185         return 0;
186 }
187 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
188 
189 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
190                                 u32 usage_id)
191 {
192         struct hid_sensor_hub_callbacks_list *callback;
193         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
194         unsigned long flags;
195 
196         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
197         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
198                 if (callback->usage_id == usage_id &&
199                                                 callback->hsdev == hsdev) {
200                         list_del(&callback->list);
201                         kfree(callback);
202                         break;
203                 }
204         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
205 
206         return 0;
207 }
208 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
209 
210 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
211                                 u32 field_index, s32 value)
212 {
213         struct hid_report *report;
214         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
215         int ret = 0;
216 
217         mutex_lock(&data->mutex);
218         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
219         if (!report || (field_index >= report->maxfield)) {
220                 ret = -EINVAL;
221                 goto done_proc;
222         }
223         hid_set_field(report->field[field_index], 0, value);
224         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
225         hid_hw_wait(hsdev->hdev);
226 
227 done_proc:
228         mutex_unlock(&data->mutex);
229 
230         return ret;
231 }
232 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
233 
234 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
235                                 u32 field_index, s32 *value)
236 {
237         struct hid_report *report;
238         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
239         int ret = 0;
240 
241         mutex_lock(&data->mutex);
242         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
243         if (!report || (field_index >= report->maxfield) ||
244             report->field[field_index]->report_count < 1) {
245                 ret = -EINVAL;
246                 goto done_proc;
247         }
248         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
249         hid_hw_wait(hsdev->hdev);
250         *value = report->field[field_index]->value[0];
251 
252 done_proc:
253         mutex_unlock(&data->mutex);
254 
255         return ret;
256 }
257 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
258 
259 
260 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
261                                         u32 usage_id,
262                                         u32 attr_usage_id, u32 report_id)
263 {
264         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
265         unsigned long flags;
266         struct hid_report *report;
267         int ret_val = 0;
268 
269         mutex_lock(&data->mutex);
270         memset(&data->pending, 0, sizeof(data->pending));
271         init_completion(&data->pending.ready);
272         data->pending.usage_id = usage_id;
273         data->pending.attr_usage_id = attr_usage_id;
274         data->pending.raw_size = 0;
275 
276         spin_lock_irqsave(&data->lock, flags);
277         data->pending.status = true;
278         spin_unlock_irqrestore(&data->lock, flags);
279         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
280         if (!report)
281                 goto err_free;
282 
283         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
284         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
285         switch (data->pending.raw_size) {
286         case 1:
287                 ret_val = *(u8 *)data->pending.raw_data;
288                 break;
289         case 2:
290                 ret_val = *(u16 *)data->pending.raw_data;
291                 break;
292         case 4:
293                 ret_val = *(u32 *)data->pending.raw_data;
294                 break;
295         default:
296                 ret_val = 0;
297         }
298         kfree(data->pending.raw_data);
299 
300 err_free:
301         data->pending.status = false;
302         mutex_unlock(&data->mutex);
303 
304         return ret_val;
305 }
306 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
307 
308 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
309                                 u32 report_id, int field_index, u32 usage_id)
310 {
311         struct hid_report *report;
312         struct hid_field *field;
313         int i;
314 
315         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
316         if (!report || (field_index >= report->maxfield))
317                 goto done_proc;
318 
319         field = report->field[field_index];
320         for (i = 0; i < field->maxusage; ++i) {
321                 if (field->usage[i].hid == usage_id)
322                         return field->usage[i].usage_index;
323         }
324 
325 done_proc:
326         return -EINVAL;
327 }
328 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
329 
330 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
331                                 u8 type,
332                                 u32 usage_id,
333                                 u32 attr_usage_id,
334                                 struct hid_sensor_hub_attribute_info *info)
335 {
336         int ret = -1;
337         int i;
338         struct hid_report *report;
339         struct hid_field *field;
340         struct hid_report_enum *report_enum;
341         struct hid_device *hdev = hsdev->hdev;
342 
343         /* Initialize with defaults */
344         info->usage_id = usage_id;
345         info->attrib_id = attr_usage_id;
346         info->report_id = -1;
347         info->index = -1;
348         info->units = -1;
349         info->unit_expo = -1;
350 
351         report_enum = &hdev->report_enum[type];
352         list_for_each_entry(report, &report_enum->report_list, list) {
353                 for (i = 0; i < report->maxfield; ++i) {
354                         field = report->field[i];
355                         if (field->maxusage) {
356                                 if (field->physical == usage_id &&
357                                         (field->logical == attr_usage_id ||
358                                         field->usage[0].hid ==
359                                                         attr_usage_id) &&
360                                         (field->usage[0].collection_index >=
361                                         hsdev->start_collection_index) &&
362                                         (field->usage[0].collection_index <
363                                         hsdev->end_collection_index)) {
364 
365                                         sensor_hub_fill_attr_info(info, i,
366                                                                 report->id,
367                                                                 field);
368                                         ret = 0;
369                                         break;
370                                 }
371                         }
372                 }
373 
374         }
375 
376         return ret;
377 }
378 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
379 
380 #ifdef CONFIG_PM
381 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
382 {
383         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
384         struct hid_sensor_hub_callbacks_list *callback;
385         unsigned long flags;
386 
387         hid_dbg(hdev, " sensor_hub_suspend\n");
388         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
389         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
390                 if (callback->usage_callback->suspend)
391                         callback->usage_callback->suspend(
392                                         callback->hsdev, callback->priv);
393         }
394         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
395 
396         return 0;
397 }
398 
399 static int sensor_hub_resume(struct hid_device *hdev)
400 {
401         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
402         struct hid_sensor_hub_callbacks_list *callback;
403         unsigned long flags;
404 
405         hid_dbg(hdev, " sensor_hub_resume\n");
406         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
407         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
408                 if (callback->usage_callback->resume)
409                         callback->usage_callback->resume(
410                                         callback->hsdev, callback->priv);
411         }
412         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
413 
414         return 0;
415 }
416 
417 static int sensor_hub_reset_resume(struct hid_device *hdev)
418 {
419         return 0;
420 }
421 #endif
422 
423 /*
424  * Handle raw report as sent by device
425  */
426 static int sensor_hub_raw_event(struct hid_device *hdev,
427                 struct hid_report *report, u8 *raw_data, int size)
428 {
429         int i;
430         u8 *ptr;
431         int sz;
432         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
433         unsigned long flags;
434         struct hid_sensor_hub_callbacks *callback = NULL;
435         struct hid_collection *collection = NULL;
436         void *priv = NULL;
437         struct hid_sensor_hub_device *hsdev = NULL;
438 
439         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
440                          report->id, size, report->type);
441         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
442         if (report->type != HID_INPUT_REPORT)
443                 return 1;
444 
445         ptr = raw_data;
446         ptr++; /* Skip report id */
447 
448         spin_lock_irqsave(&pdata->lock, flags);
449 
450         for (i = 0; i < report->maxfield; ++i) {
451                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
452                                 i, report->field[i]->usage->collection_index,
453                                 report->field[i]->usage->hid,
454                                 (report->field[i]->report_size *
455                                         report->field[i]->report_count)/8);
456                 sz = (report->field[i]->report_size *
457                                         report->field[i]->report_count)/8;
458                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
459                                 report->field[i]->usage->hid) {
460                         hid_dbg(hdev, "data was pending ...\n");
461                         pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
462                         if (pdata->pending.raw_data)
463                                 pdata->pending.raw_size = sz;
464                         else
465                                 pdata->pending.raw_size = 0;
466                         complete(&pdata->pending.ready);
467                 }
468                 collection = &hdev->collection[
469                                 report->field[i]->usage->collection_index];
470                 hid_dbg(hdev, "collection->usage %x\n",
471                                         collection->usage);
472 
473                 callback = sensor_hub_get_callback(hdev,
474                                 report->field[i]->physical,
475                                 report->field[i]->usage[0].collection_index,
476                                 &hsdev, &priv);
477 
478                 if (callback && callback->capture_sample) {
479                         if (report->field[i]->logical)
480                                 callback->capture_sample(hsdev,
481                                         report->field[i]->logical, sz, ptr,
482                                         callback->pdev);
483                         else
484                                 callback->capture_sample(hsdev,
485                                         report->field[i]->usage->hid, sz, ptr,
486                                         callback->pdev);
487                 }
488                 ptr += sz;
489         }
490         if (callback && collection && callback->send_event)
491                 callback->send_event(hsdev, collection->usage,
492                                 callback->pdev);
493         spin_unlock_irqrestore(&pdata->lock, flags);
494 
495         return 1;
496 }
497 
498 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
499 {
500         int ret = 0;
501         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
502 
503         mutex_lock(&data->mutex);
504         if (!data->ref_cnt) {
505                 ret = hid_hw_open(hsdev->hdev);
506                 if (ret) {
507                         hid_err(hsdev->hdev, "failed to open hid device\n");
508                         mutex_unlock(&data->mutex);
509                         return ret;
510                 }
511         }
512         data->ref_cnt++;
513         mutex_unlock(&data->mutex);
514 
515         return ret;
516 }
517 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
518 
519 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
520 {
521         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
522 
523         mutex_lock(&data->mutex);
524         data->ref_cnt--;
525         if (!data->ref_cnt)
526                 hid_hw_close(hsdev->hdev);
527         mutex_unlock(&data->mutex);
528 }
529 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
530 
531 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
532                 unsigned int *rsize)
533 {
534         int index;
535         struct sensor_hub_data *sd =  hid_get_drvdata(hdev);
536         unsigned char report_block[] = {
537                                 0x0a,  0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
538         unsigned char power_block[] = {
539                                 0x0a,  0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
540 
541         if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
542                 hid_dbg(hdev, "No Enum quirks\n");
543                 return rdesc;
544         }
545 
546         /* Looks for power and report state usage id and force to 1 */
547         for (index = 0; index < *rsize; ++index) {
548                 if (((*rsize - index) > sizeof(report_block)) &&
549                         !memcmp(&rdesc[index], report_block,
550                                                 sizeof(report_block))) {
551                         rdesc[index + 4] = 0x01;
552                         index += sizeof(report_block);
553                 }
554                 if (((*rsize - index) > sizeof(power_block)) &&
555                         !memcmp(&rdesc[index], power_block,
556                                                 sizeof(power_block))) {
557                         rdesc[index + 4] = 0x01;
558                         index += sizeof(power_block);
559                 }
560         }
561 
562         return rdesc;
563 }
564 
565 static int sensor_hub_probe(struct hid_device *hdev,
566                                 const struct hid_device_id *id)
567 {
568         int ret;
569         struct sensor_hub_data *sd;
570         int i;
571         char *name;
572         int dev_cnt;
573         struct hid_sensor_hub_device *hsdev;
574         struct hid_sensor_hub_device *last_hsdev = NULL;
575 
576         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
577         if (!sd) {
578                 hid_err(hdev, "cannot allocate Sensor data\n");
579                 return -ENOMEM;
580         }
581 
582         hid_set_drvdata(hdev, sd);
583         sd->quirks = id->driver_data;
584 
585         spin_lock_init(&sd->lock);
586         spin_lock_init(&sd->dyn_callback_lock);
587         mutex_init(&sd->mutex);
588         ret = hid_parse(hdev);
589         if (ret) {
590                 hid_err(hdev, "parse failed\n");
591                 return ret;
592         }
593         INIT_LIST_HEAD(&hdev->inputs);
594 
595         ret = hid_hw_start(hdev, 0);
596         if (ret) {
597                 hid_err(hdev, "hw start failed\n");
598                 return ret;
599         }
600         INIT_LIST_HEAD(&sd->dyn_callback_list);
601         sd->hid_sensor_client_cnt = 0;
602 
603         dev_cnt = sensor_hub_get_physical_device_count(hdev);
604         if (dev_cnt > HID_MAX_PHY_DEVICES) {
605                 hid_err(hdev, "Invalid Physical device count\n");
606                 ret = -EINVAL;
607                 goto err_stop_hw;
608         }
609         sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt *
610                                                       sizeof(struct mfd_cell),
611                                                       GFP_KERNEL);
612         if (sd->hid_sensor_hub_client_devs == NULL) {
613                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
614                         ret = -ENOMEM;
615                         goto err_stop_hw;
616         }
617 
618         for (i = 0; i < hdev->maxcollection; ++i) {
619                 struct hid_collection *collection = &hdev->collection[i];
620 
621                 if (collection->type == HID_COLLECTION_PHYSICAL) {
622 
623                         hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev),
624                                              GFP_KERNEL);
625                         if (!hsdev) {
626                                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
627                                 ret = -ENOMEM;
628                                 goto err_stop_hw;
629                         }
630                         hsdev->hdev = hdev;
631                         hsdev->vendor_id = hdev->vendor;
632                         hsdev->product_id = hdev->product;
633                         hsdev->start_collection_index = i;
634                         if (last_hsdev)
635                                 last_hsdev->end_collection_index = i;
636                         last_hsdev = hsdev;
637                         name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
638                                               "HID-SENSOR-%x",
639                                               collection->usage);
640                         if (name == NULL) {
641                                 hid_err(hdev, "Failed MFD device name\n");
642                                         ret = -ENOMEM;
643                                         goto err_stop_hw;
644                         }
645                         sd->hid_sensor_hub_client_devs[
646                                 sd->hid_sensor_client_cnt].name = name;
647                         sd->hid_sensor_hub_client_devs[
648                                 sd->hid_sensor_client_cnt].platform_data =
649                                                         hsdev;
650                         sd->hid_sensor_hub_client_devs[
651                                 sd->hid_sensor_client_cnt].pdata_size =
652                                                         sizeof(*hsdev);
653                         hid_dbg(hdev, "Adding %s:%d\n", name,
654                                         hsdev->start_collection_index);
655                         sd->hid_sensor_client_cnt++;
656                 }
657         }
658         if (last_hsdev)
659                 last_hsdev->end_collection_index = i;
660 
661         ret = mfd_add_hotplug_devices(&hdev->dev,
662                         sd->hid_sensor_hub_client_devs,
663                         sd->hid_sensor_client_cnt);
664         if (ret < 0)
665                 goto err_stop_hw;
666 
667         return ret;
668 
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 
680         hid_dbg(hdev, " hardware removed\n");
681         hid_hw_close(hdev);
682         hid_hw_stop(hdev);
683         spin_lock_irqsave(&data->lock, flags);
684         if (data->pending.status)
685                 complete(&data->pending.ready);
686         spin_unlock_irqrestore(&data->lock, flags);
687         mfd_remove_devices(&hdev->dev);
688         hid_set_drvdata(hdev, NULL);
689         mutex_destroy(&data->mutex);
690 }
691 
692 static const struct hid_device_id sensor_hub_devices[] = {
693         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
694                         USB_DEVICE_ID_INTEL_HID_SENSOR_0),
695                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
696         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
697                         USB_DEVICE_ID_INTEL_HID_SENSOR_0),
698                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
699         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
700                         USB_DEVICE_ID_INTEL_HID_SENSOR_1),
701                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
702         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
703                         USB_DEVICE_ID_MS_SURFACE_PRO_2),
704                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
705         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
706                         USB_DEVICE_ID_MS_TOUCH_COVER_2),
707                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
708         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
709                         USB_DEVICE_ID_MS_TYPE_COVER_2),
710                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
711         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
712                         USB_DEVICE_ID_STM_HID_SENSOR),
713                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
714         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
715                         USB_DEVICE_ID_STM_HID_SENSOR_1),
716                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
717         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS,
718                         USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA),
719                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
720         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
721                      HID_ANY_ID) },
722         { }
723 };
724 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
725 
726 static struct hid_driver sensor_hub_driver = {
727         .name = "hid-sensor-hub",
728         .id_table = sensor_hub_devices,
729         .probe = sensor_hub_probe,
730         .remove = sensor_hub_remove,
731         .raw_event = sensor_hub_raw_event,
732         .report_fixup = sensor_hub_report_fixup,
733 #ifdef CONFIG_PM
734         .suspend = sensor_hub_suspend,
735         .resume = sensor_hub_resume,
736         .reset_resume = sensor_hub_reset_resume,
737 #endif
738 };
739 module_hid_driver(sensor_hub_driver);
740 
741 MODULE_DESCRIPTION("HID Sensor Hub driver");
742 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
743 MODULE_LICENSE("GPL");
744 

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