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401ca24f | 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> | |
401ca24f | 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 | /** | |
30 | * struct sensor_hub_pending - Synchronous read pending information | |
31 | * @status: Pending status true/false. | |
32 | * @ready: Completion synchronization data. | |
33 | * @usage_id: Usage id for physical device, E.g. Gyro usage id. | |
34 | * @attr_usage_id: Usage Id of a field, E.g. X-AXIS for a gyro. | |
35 | * @raw_size: Response size for a read request. | |
36 | * @raw_data: Place holder for received response. | |
37 | */ | |
38 | struct sensor_hub_pending { | |
39 | bool status; | |
40 | struct completion ready; | |
41 | u32 usage_id; | |
42 | u32 attr_usage_id; | |
43 | int raw_size; | |
44 | u8 *raw_data; | |
45 | }; | |
46 | ||
47 | /** | |
48 | * struct sensor_hub_data - Hold a instance data for a HID hub device | |
49 | * @hsdev: Stored hid instance for current hub device. | |
50 | * @mutex: Mutex to serialize synchronous request. | |
51 | * @lock: Spin lock to protect pending request structure. | |
52 | * @pending: Holds information of pending sync read request. | |
53 | * @dyn_callback_list: Holds callback function | |
54 | * @dyn_callback_lock: spin lock to protect callback list | |
55 | * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance. | |
56 | * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached). | |
57 | */ | |
58 | struct sensor_hub_data { | |
59 | struct hid_sensor_hub_device *hsdev; | |
60 | struct mutex mutex; | |
61 | spinlock_t lock; | |
62 | struct sensor_hub_pending pending; | |
63 | struct list_head dyn_callback_list; | |
64 | spinlock_t dyn_callback_lock; | |
65 | struct mfd_cell *hid_sensor_hub_client_devs; | |
66 | int hid_sensor_client_cnt; | |
67 | }; | |
68 | ||
69 | /** | |
70 | * struct hid_sensor_hub_callbacks_list - Stores callback list | |
71 | * @list: list head. | |
72 | * @usage_id: usage id for a physical device. | |
73 | * @usage_callback: Stores registered callback functions. | |
74 | * @priv: Private data for a physical device. | |
75 | */ | |
76 | struct hid_sensor_hub_callbacks_list { | |
77 | struct list_head list; | |
78 | u32 usage_id; | |
79 | struct hid_sensor_hub_callbacks *usage_callback; | |
80 | void *priv; | |
81 | }; | |
82 | ||
401ca24f | 83 | static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev, |
84 | int dir) | |
85 | { | |
86 | struct hid_report *report; | |
87 | ||
88 | list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) { | |
89 | if (report->id == id) | |
90 | return report; | |
91 | } | |
92 | hid_warn(hdev, "No report with id 0x%x found\n", id); | |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
97 | static int sensor_hub_get_physical_device_count( | |
98 | struct hid_report_enum *report_enum) | |
99 | { | |
100 | struct hid_report *report; | |
101 | struct hid_field *field; | |
102 | int cnt = 0; | |
103 | ||
104 | list_for_each_entry(report, &report_enum->report_list, list) { | |
105 | field = report->field[0]; | |
5902fde1 | 106 | if (report->maxfield && field && field->physical) |
401ca24f | 107 | cnt++; |
108 | } | |
109 | ||
110 | return cnt; | |
111 | } | |
112 | ||
113 | static void sensor_hub_fill_attr_info( | |
114 | struct hid_sensor_hub_attribute_info *info, | |
115 | s32 index, s32 report_id, s32 units, s32 unit_expo, s32 size) | |
116 | { | |
117 | info->index = index; | |
118 | info->report_id = report_id; | |
119 | info->units = units; | |
120 | info->unit_expo = unit_expo; | |
121 | info->size = size/8; | |
122 | } | |
123 | ||
124 | static struct hid_sensor_hub_callbacks *sensor_hub_get_callback( | |
125 | struct hid_device *hdev, | |
126 | u32 usage_id, void **priv) | |
127 | { | |
128 | struct hid_sensor_hub_callbacks_list *callback; | |
129 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); | |
130 | ||
131 | spin_lock(&pdata->dyn_callback_lock); | |
132 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) | |
133 | if (callback->usage_id == usage_id) { | |
134 | *priv = callback->priv; | |
135 | spin_unlock(&pdata->dyn_callback_lock); | |
136 | return callback->usage_callback; | |
137 | } | |
138 | spin_unlock(&pdata->dyn_callback_lock); | |
139 | ||
140 | return NULL; | |
141 | } | |
142 | ||
143 | int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, | |
144 | u32 usage_id, | |
145 | struct hid_sensor_hub_callbacks *usage_callback) | |
146 | { | |
147 | struct hid_sensor_hub_callbacks_list *callback; | |
148 | struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); | |
149 | ||
150 | spin_lock(&pdata->dyn_callback_lock); | |
151 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) | |
152 | if (callback->usage_id == usage_id) { | |
153 | spin_unlock(&pdata->dyn_callback_lock); | |
154 | return -EINVAL; | |
155 | } | |
2b7c4b8e | 156 | callback = kzalloc(sizeof(*callback), GFP_ATOMIC); |
401ca24f | 157 | if (!callback) { |
158 | spin_unlock(&pdata->dyn_callback_lock); | |
159 | return -ENOMEM; | |
160 | } | |
161 | callback->usage_callback = usage_callback; | |
162 | callback->usage_id = usage_id; | |
163 | callback->priv = NULL; | |
164 | list_add_tail(&callback->list, &pdata->dyn_callback_list); | |
165 | spin_unlock(&pdata->dyn_callback_lock); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(sensor_hub_register_callback); | |
170 | ||
171 | int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, | |
172 | u32 usage_id) | |
173 | { | |
174 | struct hid_sensor_hub_callbacks_list *callback; | |
175 | struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); | |
176 | ||
177 | spin_lock(&pdata->dyn_callback_lock); | |
178 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) | |
179 | if (callback->usage_id == usage_id) { | |
180 | list_del(&callback->list); | |
181 | kfree(callback); | |
182 | break; | |
183 | } | |
184 | spin_unlock(&pdata->dyn_callback_lock); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); | |
189 | ||
190 | int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, | |
191 | u32 field_index, s32 value) | |
192 | { | |
193 | struct hid_report *report; | |
5902fde1 | 194 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
401ca24f | 195 | int ret = 0; |
196 | ||
401ca24f | 197 | mutex_lock(&data->mutex); |
198 | report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); | |
5902fde1 | 199 | if (!report || (field_index >= report->maxfield)) { |
401ca24f | 200 | ret = -EINVAL; |
201 | goto done_proc; | |
202 | } | |
203 | hid_set_field(report->field[field_index], 0, value); | |
d8814272 | 204 | hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT); |
b7966a4d | 205 | hid_hw_wait(hsdev->hdev); |
401ca24f | 206 | |
207 | done_proc: | |
208 | mutex_unlock(&data->mutex); | |
209 | ||
210 | return ret; | |
211 | } | |
212 | EXPORT_SYMBOL_GPL(sensor_hub_set_feature); | |
213 | ||
214 | int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, | |
215 | u32 field_index, s32 *value) | |
216 | { | |
217 | struct hid_report *report; | |
5902fde1 | 218 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
401ca24f | 219 | int ret = 0; |
220 | ||
401ca24f | 221 | mutex_lock(&data->mutex); |
222 | report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); | |
4e5a494e | 223 | if (!report || (field_index >= report->maxfield) || |
9e891025 | 224 | report->field[field_index]->report_count < 1) { |
401ca24f | 225 | ret = -EINVAL; |
226 | goto done_proc; | |
227 | } | |
d8814272 | 228 | hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); |
b7966a4d | 229 | hid_hw_wait(hsdev->hdev); |
401ca24f | 230 | *value = report->field[field_index]->value[0]; |
231 | ||
232 | done_proc: | |
233 | mutex_unlock(&data->mutex); | |
234 | ||
235 | return ret; | |
236 | } | |
237 | EXPORT_SYMBOL_GPL(sensor_hub_get_feature); | |
238 | ||
239 | ||
240 | int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, | |
241 | u32 usage_id, | |
242 | u32 attr_usage_id, u32 report_id) | |
243 | { | |
5902fde1 | 244 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
401ca24f | 245 | unsigned long flags; |
246 | struct hid_report *report; | |
247 | int ret_val = 0; | |
248 | ||
401ca24f | 249 | mutex_lock(&data->mutex); |
250 | memset(&data->pending, 0, sizeof(data->pending)); | |
251 | init_completion(&data->pending.ready); | |
252 | data->pending.usage_id = usage_id; | |
253 | data->pending.attr_usage_id = attr_usage_id; | |
254 | data->pending.raw_size = 0; | |
255 | ||
256 | spin_lock_irqsave(&data->lock, flags); | |
257 | data->pending.status = true; | |
258 | report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT); | |
259 | if (!report) { | |
260 | spin_unlock_irqrestore(&data->lock, flags); | |
261 | goto err_free; | |
262 | } | |
d8814272 | 263 | hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); |
401ca24f | 264 | spin_unlock_irqrestore(&data->lock, flags); |
265 | wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5); | |
266 | switch (data->pending.raw_size) { | |
267 | case 1: | |
268 | ret_val = *(u8 *)data->pending.raw_data; | |
269 | break; | |
270 | case 2: | |
271 | ret_val = *(u16 *)data->pending.raw_data; | |
272 | break; | |
273 | case 4: | |
274 | ret_val = *(u32 *)data->pending.raw_data; | |
275 | break; | |
276 | default: | |
277 | ret_val = 0; | |
278 | } | |
279 | kfree(data->pending.raw_data); | |
280 | ||
281 | err_free: | |
282 | data->pending.status = false; | |
283 | mutex_unlock(&data->mutex); | |
284 | ||
285 | return ret_val; | |
286 | } | |
287 | EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); | |
288 | ||
289 | int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, | |
290 | u8 type, | |
291 | u32 usage_id, | |
292 | u32 attr_usage_id, | |
293 | struct hid_sensor_hub_attribute_info *info) | |
294 | { | |
295 | int ret = -1; | |
296 | int i, j; | |
297 | int collection_index = -1; | |
298 | struct hid_report *report; | |
299 | struct hid_field *field; | |
300 | struct hid_report_enum *report_enum; | |
301 | struct hid_device *hdev = hsdev->hdev; | |
302 | ||
303 | /* Initialize with defaults */ | |
304 | info->usage_id = usage_id; | |
5902fde1 | 305 | info->attrib_id = attr_usage_id; |
401ca24f | 306 | info->report_id = -1; |
307 | info->index = -1; | |
308 | info->units = -1; | |
309 | info->unit_expo = -1; | |
310 | ||
311 | for (i = 0; i < hdev->maxcollection; ++i) { | |
312 | struct hid_collection *collection = &hdev->collection[i]; | |
313 | if (usage_id == collection->usage) { | |
314 | collection_index = i; | |
315 | break; | |
316 | } | |
317 | } | |
318 | if (collection_index == -1) | |
319 | goto err_ret; | |
320 | ||
321 | report_enum = &hdev->report_enum[type]; | |
322 | list_for_each_entry(report, &report_enum->report_list, list) { | |
323 | for (i = 0; i < report->maxfield; ++i) { | |
324 | field = report->field[i]; | |
325 | if (field->physical == usage_id && | |
326 | field->logical == attr_usage_id) { | |
327 | sensor_hub_fill_attr_info(info, i, report->id, | |
328 | field->unit, field->unit_exponent, | |
329 | field->report_size); | |
330 | ret = 0; | |
331 | } else { | |
332 | for (j = 0; j < field->maxusage; ++j) { | |
333 | if (field->usage[j].hid == | |
334 | attr_usage_id && | |
335 | field->usage[j].collection_index == | |
5902fde1 | 336 | collection_index) { |
401ca24f | 337 | sensor_hub_fill_attr_info(info, |
338 | i, report->id, | |
339 | field->unit, | |
340 | field->unit_exponent, | |
341 | field->report_size); | |
342 | ret = 0; | |
343 | break; | |
344 | } | |
345 | } | |
346 | } | |
347 | if (ret == 0) | |
348 | break; | |
349 | } | |
350 | } | |
351 | ||
352 | err_ret: | |
353 | return ret; | |
354 | } | |
355 | EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); | |
356 | ||
357 | #ifdef CONFIG_PM | |
358 | static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) | |
359 | { | |
5902fde1 | 360 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
401ca24f | 361 | struct hid_sensor_hub_callbacks_list *callback; |
362 | ||
363 | hid_dbg(hdev, " sensor_hub_suspend\n"); | |
364 | spin_lock(&pdata->dyn_callback_lock); | |
365 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) { | |
366 | if (callback->usage_callback->suspend) | |
367 | callback->usage_callback->suspend( | |
368 | pdata->hsdev, callback->priv); | |
369 | } | |
370 | spin_unlock(&pdata->dyn_callback_lock); | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
375 | static int sensor_hub_resume(struct hid_device *hdev) | |
376 | { | |
5902fde1 | 377 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
401ca24f | 378 | struct hid_sensor_hub_callbacks_list *callback; |
379 | ||
380 | hid_dbg(hdev, " sensor_hub_resume\n"); | |
381 | spin_lock(&pdata->dyn_callback_lock); | |
382 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) { | |
383 | if (callback->usage_callback->resume) | |
384 | callback->usage_callback->resume( | |
385 | pdata->hsdev, callback->priv); | |
386 | } | |
387 | spin_unlock(&pdata->dyn_callback_lock); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | static int sensor_hub_reset_resume(struct hid_device *hdev) | |
393 | { | |
394 | return 0; | |
395 | } | |
396 | #endif | |
5902fde1 | 397 | |
401ca24f | 398 | /* |
399 | * Handle raw report as sent by device | |
400 | */ | |
401 | static int sensor_hub_raw_event(struct hid_device *hdev, | |
402 | struct hid_report *report, u8 *raw_data, int size) | |
403 | { | |
404 | int i; | |
405 | u8 *ptr; | |
406 | int sz; | |
407 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); | |
408 | unsigned long flags; | |
409 | struct hid_sensor_hub_callbacks *callback = NULL; | |
410 | struct hid_collection *collection = NULL; | |
411 | void *priv = NULL; | |
412 | ||
413 | hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", | |
414 | report->id, size, report->type); | |
415 | hid_dbg(hdev, "maxfield:%d\n", report->maxfield); | |
416 | if (report->type != HID_INPUT_REPORT) | |
417 | return 1; | |
418 | ||
419 | ptr = raw_data; | |
15261f6d | 420 | ptr++; /* Skip report id */ |
401ca24f | 421 | |
401ca24f | 422 | spin_lock_irqsave(&pdata->lock, flags); |
423 | ||
424 | for (i = 0; i < report->maxfield; ++i) { | |
401ca24f | 425 | hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", |
426 | i, report->field[i]->usage->collection_index, | |
427 | report->field[i]->usage->hid, | |
428 | report->field[i]->report_size/8); | |
429 | ||
430 | sz = report->field[i]->report_size/8; | |
431 | if (pdata->pending.status && pdata->pending.attr_usage_id == | |
432 | report->field[i]->usage->hid) { | |
433 | hid_dbg(hdev, "data was pending ...\n"); | |
7b0692f1 AS |
434 | pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); |
435 | if (pdata->pending.raw_data) | |
5902fde1 | 436 | pdata->pending.raw_size = sz; |
7b0692f1 | 437 | else |
401ca24f | 438 | pdata->pending.raw_size = 0; |
439 | complete(&pdata->pending.ready); | |
440 | } | |
441 | collection = &hdev->collection[ | |
442 | report->field[i]->usage->collection_index]; | |
443 | hid_dbg(hdev, "collection->usage %x\n", | |
444 | collection->usage); | |
445 | callback = sensor_hub_get_callback(pdata->hsdev->hdev, | |
446 | report->field[i]->physical, | |
447 | &priv); | |
448 | if (callback && callback->capture_sample) { | |
449 | if (report->field[i]->logical) | |
450 | callback->capture_sample(pdata->hsdev, | |
451 | report->field[i]->logical, sz, ptr, | |
452 | callback->pdev); | |
453 | else | |
454 | callback->capture_sample(pdata->hsdev, | |
455 | report->field[i]->usage->hid, sz, ptr, | |
456 | callback->pdev); | |
457 | } | |
458 | ptr += sz; | |
459 | } | |
460 | if (callback && collection && callback->send_event) | |
461 | callback->send_event(pdata->hsdev, collection->usage, | |
462 | callback->pdev); | |
463 | spin_unlock_irqrestore(&pdata->lock, flags); | |
464 | ||
401ca24f | 465 | return 1; |
466 | } | |
467 | ||
1df3a401 SP |
468 | int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) |
469 | { | |
470 | int ret = 0; | |
471 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); | |
472 | ||
473 | mutex_lock(&data->mutex); | |
474 | if (!hsdev->ref_cnt) { | |
475 | ret = hid_hw_open(hsdev->hdev); | |
476 | if (ret) { | |
477 | hid_err(hsdev->hdev, "failed to open hid device\n"); | |
478 | mutex_unlock(&data->mutex); | |
479 | return ret; | |
480 | } | |
481 | } | |
482 | hsdev->ref_cnt++; | |
483 | mutex_unlock(&data->mutex); | |
484 | ||
485 | return ret; | |
486 | } | |
487 | EXPORT_SYMBOL_GPL(sensor_hub_device_open); | |
488 | ||
489 | void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) | |
490 | { | |
491 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); | |
492 | ||
493 | mutex_lock(&data->mutex); | |
494 | hsdev->ref_cnt--; | |
495 | if (!hsdev->ref_cnt) | |
496 | hid_hw_close(hsdev->hdev); | |
497 | mutex_unlock(&data->mutex); | |
498 | } | |
499 | EXPORT_SYMBOL_GPL(sensor_hub_device_close); | |
500 | ||
401ca24f | 501 | static int sensor_hub_probe(struct hid_device *hdev, |
502 | const struct hid_device_id *id) | |
503 | { | |
504 | int ret; | |
505 | struct sensor_hub_data *sd; | |
506 | int i; | |
507 | char *name; | |
508 | struct hid_report *report; | |
509 | struct hid_report_enum *report_enum; | |
510 | struct hid_field *field; | |
511 | int dev_cnt; | |
512 | ||
905cc199 | 513 | sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); |
401ca24f | 514 | if (!sd) { |
515 | hid_err(hdev, "cannot allocate Sensor data\n"); | |
516 | return -ENOMEM; | |
517 | } | |
905cc199 | 518 | sd->hsdev = devm_kzalloc(&hdev->dev, sizeof(*sd->hsdev), GFP_KERNEL); |
401ca24f | 519 | if (!sd->hsdev) { |
520 | hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); | |
905cc199 | 521 | return -ENOMEM; |
401ca24f | 522 | } |
523 | hid_set_drvdata(hdev, sd); | |
524 | sd->hsdev->hdev = hdev; | |
525 | sd->hsdev->vendor_id = hdev->vendor; | |
526 | sd->hsdev->product_id = hdev->product; | |
527 | spin_lock_init(&sd->lock); | |
528 | spin_lock_init(&sd->dyn_callback_lock); | |
529 | mutex_init(&sd->mutex); | |
530 | ret = hid_parse(hdev); | |
531 | if (ret) { | |
532 | hid_err(hdev, "parse failed\n"); | |
905cc199 | 533 | return ret; |
401ca24f | 534 | } |
401ca24f | 535 | INIT_LIST_HEAD(&hdev->inputs); |
536 | ||
401ca24f | 537 | ret = hid_hw_start(hdev, 0); |
538 | if (ret) { | |
539 | hid_err(hdev, "hw start failed\n"); | |
905cc199 | 540 | return ret; |
401ca24f | 541 | } |
401ca24f | 542 | INIT_LIST_HEAD(&sd->dyn_callback_list); |
543 | sd->hid_sensor_client_cnt = 0; | |
544 | report_enum = &hdev->report_enum[HID_INPUT_REPORT]; | |
545 | ||
546 | dev_cnt = sensor_hub_get_physical_device_count(report_enum); | |
547 | if (dev_cnt > HID_MAX_PHY_DEVICES) { | |
548 | hid_err(hdev, "Invalid Physical device count\n"); | |
549 | ret = -EINVAL; | |
1df3a401 | 550 | goto err_stop_hw; |
401ca24f | 551 | } |
552 | sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt * | |
553 | sizeof(struct mfd_cell), | |
554 | GFP_KERNEL); | |
555 | if (sd->hid_sensor_hub_client_devs == NULL) { | |
f2f13a68 | 556 | hid_err(hdev, "Failed to allocate memory for mfd cells\n"); |
401ca24f | 557 | ret = -ENOMEM; |
1df3a401 | 558 | goto err_stop_hw; |
401ca24f | 559 | } |
560 | list_for_each_entry(report, &report_enum->report_list, list) { | |
561 | hid_dbg(hdev, "Report id:%x\n", report->id); | |
562 | field = report->field[0]; | |
563 | if (report->maxfield && field && | |
564 | field->physical) { | |
565 | name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x", | |
566 | field->physical); | |
5902fde1 | 567 | if (name == NULL) { |
f2f13a68 | 568 | hid_err(hdev, "Failed MFD device name\n"); |
401ca24f | 569 | ret = -ENOMEM; |
f2f13a68 | 570 | goto err_free_names; |
401ca24f | 571 | } |
572 | sd->hid_sensor_hub_client_devs[ | |
573 | sd->hid_sensor_client_cnt].name = name; | |
574 | sd->hid_sensor_hub_client_devs[ | |
575 | sd->hid_sensor_client_cnt].platform_data = | |
576 | sd->hsdev; | |
577 | sd->hid_sensor_hub_client_devs[ | |
578 | sd->hid_sensor_client_cnt].pdata_size = | |
579 | sizeof(*sd->hsdev); | |
580 | hid_dbg(hdev, "Adding %s:%p\n", name, sd); | |
581 | sd->hid_sensor_client_cnt++; | |
582 | } | |
583 | } | |
584 | ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs, | |
f45c69b1 | 585 | sd->hid_sensor_client_cnt, NULL, 0, NULL); |
401ca24f | 586 | if (ret < 0) |
587 | goto err_free_names; | |
588 | ||
589 | return ret; | |
590 | ||
591 | err_free_names: | |
592 | for (i = 0; i < sd->hid_sensor_client_cnt ; ++i) | |
593 | kfree(sd->hid_sensor_hub_client_devs[i].name); | |
401ca24f | 594 | kfree(sd->hid_sensor_hub_client_devs); |
401ca24f | 595 | err_stop_hw: |
596 | hid_hw_stop(hdev); | |
401ca24f | 597 | |
598 | return ret; | |
599 | } | |
600 | ||
601 | static void sensor_hub_remove(struct hid_device *hdev) | |
602 | { | |
603 | struct sensor_hub_data *data = hid_get_drvdata(hdev); | |
604 | unsigned long flags; | |
605 | int i; | |
606 | ||
607 | hid_dbg(hdev, " hardware removed\n"); | |
401ca24f | 608 | hid_hw_close(hdev); |
f2f13a68 | 609 | hid_hw_stop(hdev); |
401ca24f | 610 | spin_lock_irqsave(&data->lock, flags); |
611 | if (data->pending.status) | |
612 | complete(&data->pending.ready); | |
613 | spin_unlock_irqrestore(&data->lock, flags); | |
614 | mfd_remove_devices(&hdev->dev); | |
615 | for (i = 0; i < data->hid_sensor_client_cnt ; ++i) | |
616 | kfree(data->hid_sensor_hub_client_devs[i].name); | |
617 | kfree(data->hid_sensor_hub_client_devs); | |
618 | hid_set_drvdata(hdev, NULL); | |
619 | mutex_destroy(&data->mutex); | |
401ca24f | 620 | } |
621 | ||
622 | static const struct hid_device_id sensor_hub_devices[] = { | |
0d1e4b02 MW |
623 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, |
624 | HID_ANY_ID) }, | |
401ca24f | 625 | { } |
626 | }; | |
627 | MODULE_DEVICE_TABLE(hid, sensor_hub_devices); | |
628 | ||
401ca24f | 629 | static struct hid_driver sensor_hub_driver = { |
630 | .name = "hid-sensor-hub", | |
631 | .id_table = sensor_hub_devices, | |
632 | .probe = sensor_hub_probe, | |
633 | .remove = sensor_hub_remove, | |
634 | .raw_event = sensor_hub_raw_event, | |
635 | #ifdef CONFIG_PM | |
636 | .suspend = sensor_hub_suspend, | |
5902fde1 AS |
637 | .resume = sensor_hub_resume, |
638 | .reset_resume = sensor_hub_reset_resume, | |
401ca24f | 639 | #endif |
640 | }; | |
f425458e | 641 | module_hid_driver(sensor_hub_driver); |
401ca24f | 642 | |
643 | MODULE_DESCRIPTION("HID Sensor Hub driver"); | |
644 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); | |
645 | MODULE_LICENSE("GPL"); |