1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * HID Sensors Driver
4 * Copyright (c) 2012, Intel Corporation.
5 */
6
7 #include <linux/device.h>
8 #include <linux/hid.h>
9 #include <linux/module.h>
10 #include <linux/slab.h>
11 #include <linux/mfd/core.h>
12 #include <linux/list.h>
13 #include <linux/hid-sensor-ids.h>
14 #include <linux/hid-sensor-hub.h>
15 #include "hid-ids.h"
16
17 #define HID_SENSOR_HUB_ENUM_QUIRK 0x01
18
19 /**
20 * struct sensor_hub_data - Hold a instance data for a HID hub device
21 * @mutex: Mutex to serialize synchronous request.
22 * @lock: Spin lock to protect pending request structure.
23 * @dyn_callback_list: Holds callback function
24 * @dyn_callback_lock: spin lock to protect callback list
25 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
26 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
27 * @ref_cnt: Number of MFD clients have opened this device
28 */
29 struct sensor_hub_data {
30 struct mutex mutex;
31 spinlock_t lock;
32 struct list_head dyn_callback_list;
33 spinlock_t dyn_callback_lock;
34 struct mfd_cell *hid_sensor_hub_client_devs;
35 int hid_sensor_client_cnt;
36 int ref_cnt;
37 };
38
39 /**
40 * struct hid_sensor_hub_callbacks_list - Stores callback list
41 * @list: list head.
42 * @usage_id: usage id for a physical device.
43 * @hsdev: Stored hid instance for current hub device.
44 * @usage_callback: Stores registered callback functions.
45 * @priv: Private data for a physical device.
46 */
47 struct hid_sensor_hub_callbacks_list {
48 struct list_head list;
49 u32 usage_id;
50 struct hid_sensor_hub_device *hsdev;
51 struct hid_sensor_hub_callbacks *usage_callback;
52 void *priv;
53 };
54
sensor_hub_report(int id,struct hid_device * hdev,int dir)55 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
56 int dir)
57 {
58 struct hid_report *report;
59
60 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
61 if (report->id == id)
62 return report;
63 }
64 hid_warn(hdev, "No report with id 0x%x found\n", id);
65
66 return NULL;
67 }
68
sensor_hub_get_physical_device_count(struct hid_device * hdev)69 static int sensor_hub_get_physical_device_count(struct hid_device *hdev)
70 {
71 int i;
72 int count = 0;
73
74 for (i = 0; i < hdev->maxcollection; ++i) {
75 struct hid_collection *collection = &hdev->collection[i];
76 if (collection->type == HID_COLLECTION_PHYSICAL ||
77 collection->type == HID_COLLECTION_APPLICATION)
78 ++count;
79 }
80
81 return count;
82 }
83
sensor_hub_fill_attr_info(struct hid_sensor_hub_attribute_info * info,s32 index,s32 report_id,struct hid_field * field)84 static void sensor_hub_fill_attr_info(
85 struct hid_sensor_hub_attribute_info *info,
86 s32 index, s32 report_id, struct hid_field *field)
87 {
88 info->index = index;
89 info->report_id = report_id;
90 info->units = field->unit;
91 info->unit_expo = field->unit_exponent;
92 info->size = (field->report_size * field->report_count)/8;
93 info->logical_minimum = field->logical_minimum;
94 info->logical_maximum = field->logical_maximum;
95 }
96
sensor_hub_get_callback(struct hid_device * hdev,u32 usage_id,int collection_index,struct hid_sensor_hub_device ** hsdev,void ** priv)97 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
98 struct hid_device *hdev,
99 u32 usage_id,
100 int collection_index,
101 struct hid_sensor_hub_device **hsdev,
102 void **priv)
103 {
104 struct hid_sensor_hub_callbacks_list *callback;
105 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
106 unsigned long flags;
107
108 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
109 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
110 if ((callback->usage_id == usage_id ||
111 callback->usage_id == HID_USAGE_SENSOR_COLLECTION) &&
112 (collection_index >=
113 callback->hsdev->start_collection_index) &&
114 (collection_index <
115 callback->hsdev->end_collection_index)) {
116 *priv = callback->priv;
117 *hsdev = callback->hsdev;
118 spin_unlock_irqrestore(&pdata->dyn_callback_lock,
119 flags);
120 return callback->usage_callback;
121 }
122 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
123
124 return NULL;
125 }
126
sensor_hub_register_callback(struct hid_sensor_hub_device * hsdev,u32 usage_id,struct hid_sensor_hub_callbacks * usage_callback)127 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
128 u32 usage_id,
129 struct hid_sensor_hub_callbacks *usage_callback)
130 {
131 struct hid_sensor_hub_callbacks_list *callback;
132 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
133 unsigned long flags;
134
135 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
136 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
137 if (callback->usage_id == usage_id &&
138 callback->hsdev == hsdev) {
139 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
140 return -EINVAL;
141 }
142 callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
143 if (!callback) {
144 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
145 return -ENOMEM;
146 }
147 callback->hsdev = hsdev;
148 callback->usage_callback = usage_callback;
149 callback->usage_id = usage_id;
150 callback->priv = NULL;
151 /*
152 * If there is a handler registered for the collection type, then
153 * it will handle all reports for sensors in this collection. If
154 * there is also an individual sensor handler registration, then
155 * we want to make sure that the reports are directed to collection
156 * handler, as this may be a fusion sensor. So add collection handlers
157 * to the beginning of the list, so that they are matched first.
158 */
159 if (usage_id == HID_USAGE_SENSOR_COLLECTION)
160 list_add(&callback->list, &pdata->dyn_callback_list);
161 else
162 list_add_tail(&callback->list, &pdata->dyn_callback_list);
163 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
164
165 return 0;
166 }
167 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
168
sensor_hub_remove_callback(struct hid_sensor_hub_device * hsdev,u32 usage_id)169 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
170 u32 usage_id)
171 {
172 struct hid_sensor_hub_callbacks_list *callback;
173 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
174 unsigned long flags;
175
176 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
177 list_for_each_entry(callback, &pdata->dyn_callback_list, list)
178 if (callback->usage_id == usage_id &&
179 callback->hsdev == hsdev) {
180 list_del(&callback->list);
181 kfree(callback);
182 break;
183 }
184 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
185
186 return 0;
187 }
188 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
189
sensor_hub_set_feature(struct hid_sensor_hub_device * hsdev,u32 report_id,u32 field_index,int buffer_size,void * buffer)190 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
191 u32 field_index, int buffer_size, void *buffer)
192 {
193 struct hid_report *report;
194 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
195 __s32 *buf32 = buffer;
196 int i = 0;
197 int remaining_bytes;
198 __s32 value;
199 int ret = 0;
200
201 mutex_lock(&data->mutex);
202 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
203 if (!report || (field_index >= report->maxfield)) {
204 ret = -EINVAL;
205 goto done_proc;
206 }
207
208 remaining_bytes = buffer_size % sizeof(__s32);
209 buffer_size = buffer_size / sizeof(__s32);
210 if (buffer_size) {
211 for (i = 0; i < buffer_size; ++i) {
212 hid_set_field(report->field[field_index], i,
213 (__force __s32)cpu_to_le32(*buf32));
214 ++buf32;
215 }
216 }
217 if (remaining_bytes) {
218 value = 0;
219 memcpy(&value, (u8 *)buf32, remaining_bytes);
220 hid_set_field(report->field[field_index], i,
221 (__force __s32)cpu_to_le32(value));
222 }
223 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
224 hid_hw_wait(hsdev->hdev);
225
226 done_proc:
227 mutex_unlock(&data->mutex);
228
229 return ret;
230 }
231 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
232
sensor_hub_get_feature(struct hid_sensor_hub_device * hsdev,u32 report_id,u32 field_index,int buffer_size,void * buffer)233 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
234 u32 field_index, int buffer_size, void *buffer)
235 {
236 struct hid_report *report;
237 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
238 int report_size;
239 int ret = 0;
240 u8 *val_ptr;
241 int buffer_index = 0;
242 int i;
243
244 memset(buffer, 0, buffer_size);
245
246 mutex_lock(&data->mutex);
247 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
248 if (!report || (field_index >= report->maxfield) ||
249 report->field[field_index]->report_count < 1) {
250 ret = -EINVAL;
251 goto done_proc;
252 }
253 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
254 hid_hw_wait(hsdev->hdev);
255
256 /* calculate number of bytes required to read this field */
257 report_size = DIV_ROUND_UP(report->field[field_index]->report_size,
258 8) *
259 report->field[field_index]->report_count;
260 if (!report_size) {
261 ret = -EINVAL;
262 goto done_proc;
263 }
264 ret = min(report_size, buffer_size);
265
266 val_ptr = (u8 *)report->field[field_index]->value;
267 for (i = 0; i < report->field[field_index]->report_count; ++i) {
268 if (buffer_index >= ret)
269 break;
270
271 memcpy(&((u8 *)buffer)[buffer_index], val_ptr,
272 report->field[field_index]->report_size / 8);
273 val_ptr += sizeof(__s32);
274 buffer_index += (report->field[field_index]->report_size / 8);
275 }
276
277 done_proc:
278 mutex_unlock(&data->mutex);
279
280 return ret;
281 }
282 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
283
284
sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device * hsdev,u32 usage_id,u32 attr_usage_id,u32 report_id,enum sensor_hub_read_flags flag,bool is_signed)285 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
286 u32 usage_id,
287 u32 attr_usage_id, u32 report_id,
288 enum sensor_hub_read_flags flag,
289 bool is_signed)
290 {
291 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
292 unsigned long flags;
293 struct hid_report *report;
294 int ret_val = 0;
295
296 report = sensor_hub_report(report_id, hsdev->hdev,
297 HID_INPUT_REPORT);
298 if (!report)
299 return -EINVAL;
300
301 mutex_lock(hsdev->mutex_ptr);
302 if (flag == SENSOR_HUB_SYNC) {
303 memset(&hsdev->pending, 0, sizeof(hsdev->pending));
304 init_completion(&hsdev->pending.ready);
305 hsdev->pending.usage_id = usage_id;
306 hsdev->pending.attr_usage_id = attr_usage_id;
307 hsdev->pending.raw_size = 0;
308
309 spin_lock_irqsave(&data->lock, flags);
310 hsdev->pending.status = true;
311 spin_unlock_irqrestore(&data->lock, flags);
312 }
313 mutex_lock(&data->mutex);
314 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
315 mutex_unlock(&data->mutex);
316 if (flag == SENSOR_HUB_SYNC) {
317 wait_for_completion_interruptible_timeout(
318 &hsdev->pending.ready, HZ*5);
319 switch (hsdev->pending.raw_size) {
320 case 1:
321 if (is_signed)
322 ret_val = *(s8 *)hsdev->pending.raw_data;
323 else
324 ret_val = *(u8 *)hsdev->pending.raw_data;
325 break;
326 case 2:
327 if (is_signed)
328 ret_val = *(s16 *)hsdev->pending.raw_data;
329 else
330 ret_val = *(u16 *)hsdev->pending.raw_data;
331 break;
332 case 4:
333 ret_val = *(u32 *)hsdev->pending.raw_data;
334 break;
335 default:
336 ret_val = 0;
337 }
338 kfree(hsdev->pending.raw_data);
339 hsdev->pending.status = false;
340 }
341 mutex_unlock(hsdev->mutex_ptr);
342
343 return ret_val;
344 }
345 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
346
hid_sensor_get_usage_index(struct hid_sensor_hub_device * hsdev,u32 report_id,int field_index,u32 usage_id)347 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
348 u32 report_id, int field_index, u32 usage_id)
349 {
350 struct hid_report *report;
351 struct hid_field *field;
352 int i;
353
354 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
355 if (!report || (field_index >= report->maxfield))
356 goto done_proc;
357
358 field = report->field[field_index];
359 for (i = 0; i < field->maxusage; ++i) {
360 if (field->usage[i].hid == usage_id)
361 return field->usage[i].usage_index;
362 }
363
364 done_proc:
365 return -EINVAL;
366 }
367 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
368
sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device * hsdev,u8 type,u32 usage_id,u32 attr_usage_id,struct hid_sensor_hub_attribute_info * info)369 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
370 u8 type,
371 u32 usage_id,
372 u32 attr_usage_id,
373 struct hid_sensor_hub_attribute_info *info)
374 {
375 int ret = -1;
376 int i;
377 struct hid_report *report;
378 struct hid_field *field;
379 struct hid_report_enum *report_enum;
380 struct hid_device *hdev = hsdev->hdev;
381
382 /* Initialize with defaults */
383 info->usage_id = usage_id;
384 info->attrib_id = attr_usage_id;
385 info->report_id = -1;
386 info->index = -1;
387 info->units = -1;
388 info->unit_expo = -1;
389
390 report_enum = &hdev->report_enum[type];
391 list_for_each_entry(report, &report_enum->report_list, list) {
392 for (i = 0; i < report->maxfield; ++i) {
393 field = report->field[i];
394 if (field->maxusage) {
395 if (field->physical == usage_id &&
396 (field->logical == attr_usage_id ||
397 field->usage[0].hid ==
398 attr_usage_id) &&
399 (field->usage[0].collection_index >=
400 hsdev->start_collection_index) &&
401 (field->usage[0].collection_index <
402 hsdev->end_collection_index)) {
403
404 sensor_hub_fill_attr_info(info, i,
405 report->id,
406 field);
407 ret = 0;
408 break;
409 }
410 }
411 }
412
413 }
414
415 return ret;
416 }
417 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
418
419 #ifdef CONFIG_PM
sensor_hub_suspend(struct hid_device * hdev,pm_message_t message)420 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
421 {
422 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
423 struct hid_sensor_hub_callbacks_list *callback;
424 unsigned long flags;
425
426 hid_dbg(hdev, " sensor_hub_suspend\n");
427 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
428 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
429 if (callback->usage_callback->suspend)
430 callback->usage_callback->suspend(
431 callback->hsdev, callback->priv);
432 }
433 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
434
435 return 0;
436 }
437
sensor_hub_resume(struct hid_device * hdev)438 static int sensor_hub_resume(struct hid_device *hdev)
439 {
440 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
441 struct hid_sensor_hub_callbacks_list *callback;
442 unsigned long flags;
443
444 hid_dbg(hdev, " sensor_hub_resume\n");
445 spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
446 list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
447 if (callback->usage_callback->resume)
448 callback->usage_callback->resume(
449 callback->hsdev, callback->priv);
450 }
451 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
452
453 return 0;
454 }
455
sensor_hub_reset_resume(struct hid_device * hdev)456 static int sensor_hub_reset_resume(struct hid_device *hdev)
457 {
458 return 0;
459 }
460 #endif
461
462 /*
463 * Handle raw report as sent by device
464 */
sensor_hub_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * raw_data,int size)465 static int sensor_hub_raw_event(struct hid_device *hdev,
466 struct hid_report *report, u8 *raw_data, int size)
467 {
468 int i;
469 u8 *ptr;
470 int sz;
471 struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
472 unsigned long flags;
473 struct hid_sensor_hub_callbacks *callback = NULL;
474 struct hid_collection *collection = NULL;
475 void *priv = NULL;
476 struct hid_sensor_hub_device *hsdev = NULL;
477
478 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
479 report->id, size, report->type);
480 hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
481 if (report->type != HID_INPUT_REPORT)
482 return 1;
483
484 ptr = raw_data;
485 if (report->id)
486 ptr++; /* Skip report id */
487
488 spin_lock_irqsave(&pdata->lock, flags);
489
490 for (i = 0; i < report->maxfield; ++i) {
491 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
492 i, report->field[i]->usage->collection_index,
493 report->field[i]->usage->hid,
494 (report->field[i]->report_size *
495 report->field[i]->report_count)/8);
496 sz = (report->field[i]->report_size *
497 report->field[i]->report_count)/8;
498 collection = &hdev->collection[
499 report->field[i]->usage->collection_index];
500 hid_dbg(hdev, "collection->usage %x\n",
501 collection->usage);
502
503 callback = sensor_hub_get_callback(hdev,
504 report->field[i]->physical,
505 report->field[i]->usage[0].collection_index,
506 &hsdev, &priv);
507 if (!callback) {
508 ptr += sz;
509 continue;
510 }
511 if (hsdev->pending.status && (hsdev->pending.attr_usage_id ==
512 report->field[i]->usage->hid ||
513 hsdev->pending.attr_usage_id ==
514 report->field[i]->logical)) {
515 hid_dbg(hdev, "data was pending ...\n");
516 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
517 if (hsdev->pending.raw_data)
518 hsdev->pending.raw_size = sz;
519 else
520 hsdev->pending.raw_size = 0;
521 complete(&hsdev->pending.ready);
522 }
523 if (callback->capture_sample) {
524 if (report->field[i]->logical)
525 callback->capture_sample(hsdev,
526 report->field[i]->logical, sz, ptr,
527 callback->pdev);
528 else
529 callback->capture_sample(hsdev,
530 report->field[i]->usage->hid, sz, ptr,
531 callback->pdev);
532 }
533 ptr += sz;
534 }
535 if (callback && collection && callback->send_event)
536 callback->send_event(hsdev, collection->usage,
537 callback->pdev);
538 spin_unlock_irqrestore(&pdata->lock, flags);
539
540 return 1;
541 }
542
sensor_hub_device_open(struct hid_sensor_hub_device * hsdev)543 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
544 {
545 int ret = 0;
546 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
547
548 mutex_lock(&data->mutex);
549 if (!data->ref_cnt) {
550 ret = hid_hw_open(hsdev->hdev);
551 if (ret) {
552 hid_err(hsdev->hdev, "failed to open hid device\n");
553 mutex_unlock(&data->mutex);
554 return ret;
555 }
556 }
557 data->ref_cnt++;
558 mutex_unlock(&data->mutex);
559
560 return ret;
561 }
562 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
563
sensor_hub_device_close(struct hid_sensor_hub_device * hsdev)564 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
565 {
566 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
567
568 mutex_lock(&data->mutex);
569 data->ref_cnt--;
570 if (!data->ref_cnt)
571 hid_hw_close(hsdev->hdev);
572 mutex_unlock(&data->mutex);
573 }
574 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
575
sensor_hub_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)576 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
577 unsigned int *rsize)
578 {
579 /*
580 * Checks if the report descriptor of Thinkpad Helix 2 has a logical
581 * minimum for magnetic flux axis greater than the maximum.
582 */
583 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA &&
584 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 &&
585 rdesc[915] == 0x81 && rdesc[916] == 0x08 &&
586 rdesc[917] == 0x00 && rdesc[918] == 0x27 &&
587 rdesc[921] == 0x07 && rdesc[922] == 0x00) {
588 /* Sets negative logical minimum for mag x, y and z */
589 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0;
590 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e;
591 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7;
592 rdesc[917] = rdesc[938] = rdesc[959] = 0xff;
593 }
594
595 return rdesc;
596 }
597
sensor_hub_probe(struct hid_device * hdev,const struct hid_device_id * id)598 static int sensor_hub_probe(struct hid_device *hdev,
599 const struct hid_device_id *id)
600 {
601 int ret;
602 struct sensor_hub_data *sd;
603 int i;
604 char *name;
605 int dev_cnt;
606 struct hid_sensor_hub_device *hsdev;
607 struct hid_sensor_hub_device *last_hsdev = NULL;
608 struct hid_sensor_hub_device *collection_hsdev = NULL;
609
610 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
611 if (!sd) {
612 hid_err(hdev, "cannot allocate Sensor data\n");
613 return -ENOMEM;
614 }
615
616 hid_set_drvdata(hdev, sd);
617
618 spin_lock_init(&sd->lock);
619 spin_lock_init(&sd->dyn_callback_lock);
620 mutex_init(&sd->mutex);
621 ret = hid_parse(hdev);
622 if (ret) {
623 hid_err(hdev, "parse failed\n");
624 return ret;
625 }
626 INIT_LIST_HEAD(&hdev->inputs);
627
628 ret = hid_hw_start(hdev, 0);
629 if (ret) {
630 hid_err(hdev, "hw start failed\n");
631 return ret;
632 }
633 INIT_LIST_HEAD(&sd->dyn_callback_list);
634 sd->hid_sensor_client_cnt = 0;
635
636 dev_cnt = sensor_hub_get_physical_device_count(hdev);
637 if (dev_cnt > HID_MAX_PHY_DEVICES) {
638 hid_err(hdev, "Invalid Physical device count\n");
639 ret = -EINVAL;
640 goto err_stop_hw;
641 }
642 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev,
643 dev_cnt,
644 sizeof(struct mfd_cell),
645 GFP_KERNEL);
646 if (sd->hid_sensor_hub_client_devs == NULL) {
647 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
648 ret = -ENOMEM;
649 goto err_stop_hw;
650 }
651
652 for (i = 0; i < hdev->maxcollection; ++i) {
653 struct hid_collection *collection = &hdev->collection[i];
654
655 if (collection->type == HID_COLLECTION_PHYSICAL ||
656 collection->type == HID_COLLECTION_APPLICATION) {
657
658 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev),
659 GFP_KERNEL);
660 if (!hsdev) {
661 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
662 ret = -ENOMEM;
663 goto err_stop_hw;
664 }
665 hsdev->hdev = hdev;
666 hsdev->vendor_id = hdev->vendor;
667 hsdev->product_id = hdev->product;
668 hsdev->usage = collection->usage;
669 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev,
670 sizeof(struct mutex),
671 GFP_KERNEL);
672 if (!hsdev->mutex_ptr) {
673 ret = -ENOMEM;
674 goto err_stop_hw;
675 }
676 mutex_init(hsdev->mutex_ptr);
677 hsdev->start_collection_index = i;
678 if (last_hsdev)
679 last_hsdev->end_collection_index = i;
680 last_hsdev = hsdev;
681 name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
682 "HID-SENSOR-%x",
683 collection->usage);
684 if (name == NULL) {
685 hid_err(hdev, "Failed MFD device name\n");
686 ret = -ENOMEM;
687 goto err_stop_hw;
688 }
689 sd->hid_sensor_hub_client_devs[
690 sd->hid_sensor_client_cnt].name = name;
691 sd->hid_sensor_hub_client_devs[
692 sd->hid_sensor_client_cnt].platform_data =
693 hsdev;
694 sd->hid_sensor_hub_client_devs[
695 sd->hid_sensor_client_cnt].pdata_size =
696 sizeof(*hsdev);
697 hid_dbg(hdev, "Adding %s:%d\n", name,
698 hsdev->start_collection_index);
699 sd->hid_sensor_client_cnt++;
700 if (collection_hsdev)
701 collection_hsdev->end_collection_index = i;
702 if (collection->type == HID_COLLECTION_APPLICATION &&
703 collection->usage == HID_USAGE_SENSOR_COLLECTION)
704 collection_hsdev = hsdev;
705 }
706 }
707 if (last_hsdev)
708 last_hsdev->end_collection_index = i;
709 if (collection_hsdev)
710 collection_hsdev->end_collection_index = i;
711
712 ret = mfd_add_hotplug_devices(&hdev->dev,
713 sd->hid_sensor_hub_client_devs,
714 sd->hid_sensor_client_cnt);
715 if (ret < 0)
716 goto err_stop_hw;
717
718 return ret;
719
720 err_stop_hw:
721 hid_hw_stop(hdev);
722
723 return ret;
724 }
725
sensor_hub_remove(struct hid_device * hdev)726 static void sensor_hub_remove(struct hid_device *hdev)
727 {
728 struct sensor_hub_data *data = hid_get_drvdata(hdev);
729 unsigned long flags;
730 int i;
731
732 hid_dbg(hdev, " hardware removed\n");
733 hid_hw_close(hdev);
734 hid_hw_stop(hdev);
735 spin_lock_irqsave(&data->lock, flags);
736 for (i = 0; i < data->hid_sensor_client_cnt; ++i) {
737 struct hid_sensor_hub_device *hsdev =
738 data->hid_sensor_hub_client_devs[i].platform_data;
739 if (hsdev->pending.status)
740 complete(&hsdev->pending.ready);
741 }
742 spin_unlock_irqrestore(&data->lock, flags);
743 mfd_remove_devices(&hdev->dev);
744 mutex_destroy(&data->mutex);
745 }
746
747 static const struct hid_device_id sensor_hub_devices[] = {
748 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
749 HID_ANY_ID) },
750 { }
751 };
752 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
753
754 static struct hid_driver sensor_hub_driver = {
755 .name = "hid-sensor-hub",
756 .id_table = sensor_hub_devices,
757 .probe = sensor_hub_probe,
758 .remove = sensor_hub_remove,
759 .raw_event = sensor_hub_raw_event,
760 .report_fixup = sensor_hub_report_fixup,
761 #ifdef CONFIG_PM
762 .suspend = sensor_hub_suspend,
763 .resume = sensor_hub_resume,
764 .reset_resume = sensor_hub_reset_resume,
765 #endif
766 };
767 module_hid_driver(sensor_hub_driver);
768
769 MODULE_DESCRIPTION("HID Sensor Hub driver");
770 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
771 MODULE_LICENSE("GPL");
772