Version:  2.0.40 2.2.26 2.4.37 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 3.16

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         unsigned long flags;
163 
164         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
165         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
166                 if (callback->usage_id == usage_id &&
167                                                 callback->hsdev == hsdev) {
168                         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
169                         return -EINVAL;
170                 }
171         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
172         if (!callback) {
173                 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
174                 return -ENOMEM;
175         }
176         callback->hsdev = hsdev;
177         callback->usage_callback = usage_callback;
178         callback->usage_id = usage_id;
179         callback->priv = NULL;
180         list_add_tail(&callback->list, &pdata->dyn_callback_list);
181         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
182 
183         return 0;
184 }
185 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
186 
187 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
188                                 u32 usage_id)
189 {
190         struct hid_sensor_hub_callbacks_list *callback;
191         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
192         unsigned long flags;
193 
194         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
195         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
196                 if (callback->usage_id == usage_id &&
197                                                 callback->hsdev == hsdev) {
198                         list_del(&callback->list);
199                         kfree(callback);
200                         break;
201                 }
202         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
203 
204         return 0;
205 }
206 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
207 
208 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
209                                 u32 field_index, s32 value)
210 {
211         struct hid_report *report;
212         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
213         int ret = 0;
214 
215         mutex_lock(&data->mutex);
216         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
217         if (!report || (field_index >= report->maxfield)) {
218                 ret = -EINVAL;
219                 goto done_proc;
220         }
221         hid_set_field(report->field[field_index], 0, value);
222         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
223         hid_hw_wait(hsdev->hdev);
224 
225 done_proc:
226         mutex_unlock(&data->mutex);
227 
228         return ret;
229 }
230 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
231 
232 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
233                                 u32 field_index, s32 *value)
234 {
235         struct hid_report *report;
236         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
237         int ret = 0;
238 
239         mutex_lock(&data->mutex);
240         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
241         if (!report || (field_index >= report->maxfield) ||
242             report->field[field_index]->report_count < 1) {
243                 ret = -EINVAL;
244                 goto done_proc;
245         }
246         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
247         hid_hw_wait(hsdev->hdev);
248         *value = report->field[field_index]->value[0];
249 
250 done_proc:
251         mutex_unlock(&data->mutex);
252 
253         return ret;
254 }
255 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
256 
257 
258 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
259                                         u32 usage_id,
260                                         u32 attr_usage_id, u32 report_id)
261 {
262         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
263         unsigned long flags;
264         struct hid_report *report;
265         int ret_val = 0;
266 
267         mutex_lock(&data->mutex);
268         memset(&data->pending, 0, sizeof(data->pending));
269         init_completion(&data->pending.ready);
270         data->pending.usage_id = usage_id;
271         data->pending.attr_usage_id = attr_usage_id;
272         data->pending.raw_size = 0;
273 
274         spin_lock_irqsave(&data->lock, flags);
275         data->pending.status = true;
276         spin_unlock_irqrestore(&data->lock, flags);
277         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
278         if (!report)
279                 goto err_free;
280 
281         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
282         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
283         switch (data->pending.raw_size) {
284         case 1:
285                 ret_val = *(u8 *)data->pending.raw_data;
286                 break;
287         case 2:
288                 ret_val = *(u16 *)data->pending.raw_data;
289                 break;
290         case 4:
291                 ret_val = *(u32 *)data->pending.raw_data;
292                 break;
293         default:
294                 ret_val = 0;
295         }
296         kfree(data->pending.raw_data);
297 
298 err_free:
299         data->pending.status = false;
300         mutex_unlock(&data->mutex);
301 
302         return ret_val;
303 }
304 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
305 
306 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
307                                 u32 report_id, int field_index, u32 usage_id)
308 {
309         struct hid_report *report;
310         struct hid_field *field;
311         int i;
312 
313         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
314         if (!report || (field_index >= report->maxfield))
315                 goto done_proc;
316 
317         field = report->field[field_index];
318         for (i = 0; i < field->maxusage; ++i) {
319                 if (field->usage[i].hid == usage_id)
320                         return field->usage[i].usage_index;
321         }
322 
323 done_proc:
324         return -EINVAL;
325 }
326 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
327 
328 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
329                                 u8 type,
330                                 u32 usage_id,
331                                 u32 attr_usage_id,
332                                 struct hid_sensor_hub_attribute_info *info)
333 {
334         int ret = -1;
335         int i;
336         struct hid_report *report;
337         struct hid_field *field;
338         struct hid_report_enum *report_enum;
339         struct hid_device *hdev = hsdev->hdev;
340 
341         /* Initialize with defaults */
342         info->usage_id = usage_id;
343         info->attrib_id = attr_usage_id;
344         info->report_id = -1;
345         info->index = -1;
346         info->units = -1;
347         info->unit_expo = -1;
348 
349         report_enum = &hdev->report_enum[type];
350         list_for_each_entry(report, &report_enum->report_list, list) {
351                 for (i = 0; i < report->maxfield; ++i) {
352                         field = report->field[i];
353                         if (field->maxusage) {
354                                 if (field->physical == usage_id &&
355                                         (field->logical == attr_usage_id ||
356                                         field->usage[0].hid ==
357                                                         attr_usage_id) &&
358                                         (field->usage[0].collection_index >=
359                                         hsdev->start_collection_index) &&
360                                         (field->usage[0].collection_index <
361                                         hsdev->end_collection_index)) {
362 
363                                         sensor_hub_fill_attr_info(info, i,
364                                                                 report->id,
365                                                                 field);
366                                         ret = 0;
367                                         break;
368                                 }
369                         }
370                 }
371 
372         }
373 
374         return ret;
375 }
376 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
377 
378 #ifdef CONFIG_PM
379 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
380 {
381         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
382         struct hid_sensor_hub_callbacks_list *callback;
383         unsigned long flags;
384 
385         hid_dbg(hdev, " sensor_hub_suspend\n");
386         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
387         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
388                 if (callback->usage_callback->suspend)
389                         callback->usage_callback->suspend(
390                                         callback->hsdev, callback->priv);
391         }
392         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
393 
394         return 0;
395 }
396 
397 static int sensor_hub_resume(struct hid_device *hdev)
398 {
399         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
400         struct hid_sensor_hub_callbacks_list *callback;
401         unsigned long flags;
402 
403         hid_dbg(hdev, " sensor_hub_resume\n");
404         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
405         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
406                 if (callback->usage_callback->resume)
407                         callback->usage_callback->resume(
408                                         callback->hsdev, callback->priv);
409         }
410         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
411 
412         return 0;
413 }
414 
415 static int sensor_hub_reset_resume(struct hid_device *hdev)
416 {
417         return 0;
418 }
419 #endif
420 
421 /*
422  * Handle raw report as sent by device
423  */
424 static int sensor_hub_raw_event(struct hid_device *hdev,
425                 struct hid_report *report, u8 *raw_data, int size)
426 {
427         int i;
428         u8 *ptr;
429         int sz;
430         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
431         unsigned long flags;
432         struct hid_sensor_hub_callbacks *callback = NULL;
433         struct hid_collection *collection = NULL;
434         void *priv = NULL;
435         struct hid_sensor_hub_device *hsdev = NULL;
436 
437         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
438                          report->id, size, report->type);
439         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
440         if (report->type != HID_INPUT_REPORT)
441                 return 1;
442 
443         ptr = raw_data;
444         ptr++; /* Skip report id */
445 
446         spin_lock_irqsave(&pdata->lock, flags);
447 
448         for (i = 0; i < report->maxfield; ++i) {
449                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
450                                 i, report->field[i]->usage->collection_index,
451                                 report->field[i]->usage->hid,
452                                 (report->field[i]->report_size *
453                                         report->field[i]->report_count)/8);
454                 sz = (report->field[i]->report_size *
455                                         report->field[i]->report_count)/8;
456                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
457                                 report->field[i]->usage->hid) {
458                         hid_dbg(hdev, "data was pending ...\n");
459                         pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
460                         if (pdata->pending.raw_data)
461                                 pdata->pending.raw_size = sz;
462                         else
463                                 pdata->pending.raw_size = 0;
464                         complete(&pdata->pending.ready);
465                 }
466                 collection = &hdev->collection[
467                                 report->field[i]->usage->collection_index];
468                 hid_dbg(hdev, "collection->usage %x\n",
469                                         collection->usage);
470 
471                 callback = sensor_hub_get_callback(hdev,
472                                 report->field[i]->physical,
473                                 report->field[i]->usage[0].collection_index,
474                                 &hsdev, &priv);
475 
476                 if (callback && callback->capture_sample) {
477                         if (report->field[i]->logical)
478                                 callback->capture_sample(hsdev,
479                                         report->field[i]->logical, sz, ptr,
480                                         callback->pdev);
481                         else
482                                 callback->capture_sample(hsdev,
483                                         report->field[i]->usage->hid, sz, ptr,
484                                         callback->pdev);
485                 }
486                 ptr += sz;
487         }
488         if (callback && collection && callback->send_event)
489                 callback->send_event(hsdev, collection->usage,
490                                 callback->pdev);
491         spin_unlock_irqrestore(&pdata->lock, flags);
492 
493         return 1;
494 }
495 
496 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
497 {
498         int ret = 0;
499         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
500 
501         mutex_lock(&data->mutex);
502         if (!data->ref_cnt) {
503                 ret = hid_hw_open(hsdev->hdev);
504                 if (ret) {
505                         hid_err(hsdev->hdev, "failed to open hid device\n");
506                         mutex_unlock(&data->mutex);
507                         return ret;
508                 }
509         }
510         data->ref_cnt++;
511         mutex_unlock(&data->mutex);
512 
513         return ret;
514 }
515 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
516 
517 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
518 {
519         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
520 
521         mutex_lock(&data->mutex);
522         data->ref_cnt--;
523         if (!data->ref_cnt)
524                 hid_hw_close(hsdev->hdev);
525         mutex_unlock(&data->mutex);
526 }
527 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
528 
529 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
530                 unsigned int *rsize)
531 {
532         int index;
533         struct sensor_hub_data *sd =  hid_get_drvdata(hdev);
534         unsigned char report_block[] = {
535                                 0x0a,  0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
536         unsigned char power_block[] = {
537                                 0x0a,  0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
538 
539         if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
540                 hid_dbg(hdev, "No Enum quirks\n");
541                 return rdesc;
542         }
543 
544         /* Looks for power and report state usage id and force to 1 */
545         for (index = 0; index < *rsize; ++index) {
546                 if (((*rsize - index) > sizeof(report_block)) &&
547                         !memcmp(&rdesc[index], report_block,
548                                                 sizeof(report_block))) {
549                         rdesc[index + 4] = 0x01;
550                         index += sizeof(report_block);
551                 }
552                 if (((*rsize - index) > sizeof(power_block)) &&
553                         !memcmp(&rdesc[index], power_block,
554                                                 sizeof(power_block))) {
555                         rdesc[index + 4] = 0x01;
556                         index += sizeof(power_block);
557                 }
558         }
559 
560         return rdesc;
561 }
562 
563 static int sensor_hub_probe(struct hid_device *hdev,
564                                 const struct hid_device_id *id)
565 {
566         int ret;
567         struct sensor_hub_data *sd;
568         int i;
569         char *name;
570         int dev_cnt;
571         struct hid_sensor_hub_device *hsdev;
572         struct hid_sensor_hub_device *last_hsdev = NULL;
573 
574         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
575         if (!sd) {
576                 hid_err(hdev, "cannot allocate Sensor data\n");
577                 return -ENOMEM;
578         }
579 
580         hid_set_drvdata(hdev, sd);
581         sd->quirks = id->driver_data;
582 
583         spin_lock_init(&sd->lock);
584         spin_lock_init(&sd->dyn_callback_lock);
585         mutex_init(&sd->mutex);
586         ret = hid_parse(hdev);
587         if (ret) {
588                 hid_err(hdev, "parse failed\n");
589                 return ret;
590         }
591         INIT_LIST_HEAD(&hdev->inputs);
592 
593         ret = hid_hw_start(hdev, 0);
594         if (ret) {
595                 hid_err(hdev, "hw start failed\n");
596                 return ret;
597         }
598         INIT_LIST_HEAD(&sd->dyn_callback_list);
599         sd->hid_sensor_client_cnt = 0;
600 
601         dev_cnt = sensor_hub_get_physical_device_count(hdev);
602         if (dev_cnt > HID_MAX_PHY_DEVICES) {
603                 hid_err(hdev, "Invalid Physical device count\n");
604                 ret = -EINVAL;
605                 goto err_stop_hw;
606         }
607         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
608                                                 sizeof(struct mfd_cell),
609                                                 GFP_KERNEL);
610         if (sd->hid_sensor_hub_client_devs == NULL) {
611                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
612                         ret = -ENOMEM;
613                         goto err_stop_hw;
614         }
615 
616         for (i = 0; i < hdev->maxcollection; ++i) {
617                 struct hid_collection *collection = &hdev->collection[i];
618 
619                 if (collection->type == HID_COLLECTION_PHYSICAL) {
620 
621                         hsdev = kzalloc(sizeof(*hsdev), GFP_KERNEL);
622                         if (!hsdev) {
623                                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
624                                 ret = -ENOMEM;
625                                 goto err_no_mem;
626                         }
627                         hsdev->hdev = hdev;
628                         hsdev->vendor_id = hdev->vendor;
629                         hsdev->product_id = hdev->product;
630                         hsdev->start_collection_index = i;
631                         if (last_hsdev)
632                                 last_hsdev->end_collection_index = i;
633                         last_hsdev = hsdev;
634                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
635                                         collection->usage);
636                         if (name == NULL) {
637                                 hid_err(hdev, "Failed MFD device name\n");
638                                         ret = -ENOMEM;
639                                         kfree(hsdev);
640                                         goto err_no_mem;
641                         }
642                         sd->hid_sensor_hub_client_devs[
643                                 sd->hid_sensor_client_cnt].id =
644                                                         PLATFORM_DEVID_AUTO;
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_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
662                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
663         if (ret < 0)
664                 goto err_no_mem;
665 
666         return ret;
667 
668 err_no_mem:
669         for (i = 0; i < sd->hid_sensor_client_cnt; ++i) {
670                 kfree(sd->hid_sensor_hub_client_devs[i].name);
671                 kfree(sd->hid_sensor_hub_client_devs[i].platform_data);
672         }
673         kfree(sd->hid_sensor_hub_client_devs);
674 err_stop_hw:
675         hid_hw_stop(hdev);
676 
677         return ret;
678 }
679 
680 static void sensor_hub_remove(struct hid_device *hdev)
681 {
682         struct sensor_hub_data *data = hid_get_drvdata(hdev);
683         unsigned long flags;
684         int i;
685 
686         hid_dbg(hdev, " hardware removed\n");
687         hid_hw_close(hdev);
688         hid_hw_stop(hdev);
689         spin_lock_irqsave(&data->lock, flags);
690         if (data->pending.status)
691                 complete(&data->pending.ready);
692         spin_unlock_irqrestore(&data->lock, flags);
693         mfd_remove_devices(&hdev->dev);
694         for (i = 0; i < data->hid_sensor_client_cnt; ++i) {
695                 kfree(data->hid_sensor_hub_client_devs[i].name);
696                 kfree(data->hid_sensor_hub_client_devs[i].platform_data);
697         }
698         kfree(data->hid_sensor_hub_client_devs);
699         hid_set_drvdata(hdev, NULL);
700         mutex_destroy(&data->mutex);
701 }
702 
703 static const struct hid_device_id sensor_hub_devices[] = {
704         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
705                         USB_DEVICE_ID_INTEL_HID_SENSOR_0),
706                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
707         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
708                         USB_DEVICE_ID_INTEL_HID_SENSOR_0),
709                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
710         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
711                         USB_DEVICE_ID_INTEL_HID_SENSOR_1),
712                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
713         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
714                         USB_DEVICE_ID_MS_SURFACE_PRO_2),
715                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
716         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
717                         USB_DEVICE_ID_MS_TOUCH_COVER_2),
718                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
719         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
720                         USB_DEVICE_ID_MS_TYPE_COVER_2),
721                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
722         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
723                         USB_DEVICE_ID_STM_HID_SENSOR_1),
724                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
725         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS,
726                         USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA),
727                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
728         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
729                      HID_ANY_ID) },
730         { }
731 };
732 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
733 
734 static struct hid_driver sensor_hub_driver = {
735         .name = "hid-sensor-hub",
736         .id_table = sensor_hub_devices,
737         .probe = sensor_hub_probe,
738         .remove = sensor_hub_remove,
739         .raw_event = sensor_hub_raw_event,
740         .report_fixup = sensor_hub_report_fixup,
741 #ifdef CONFIG_PM
742         .suspend = sensor_hub_suspend,
743         .resume = sensor_hub_resume,
744         .reset_resume = sensor_hub_reset_resume,
745 #endif
746 };
747 module_hid_driver(sensor_hub_driver);
748 
749 MODULE_DESCRIPTION("HID Sensor Hub driver");
750 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
751 MODULE_LICENSE("GPL");
752 

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