| 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_data - Hold a instance data for a HID hub device |
| 33 | * @hsdev: Stored hid instance for current hub device. |
| 34 | * @mutex: Mutex to serialize synchronous request. |
| 35 | * @lock: Spin lock to protect pending request structure. |
| 36 | * @dyn_callback_list: Holds callback function |
| 37 | * @dyn_callback_lock: spin lock to protect callback list |
| 38 | * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance. |
| 39 | * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached). |
| 40 | * @ref_cnt: Number of MFD clients have opened this device |
| 41 | */ |
| 42 | struct sensor_hub_data { |
| 43 | struct mutex mutex; |
| 44 | spinlock_t lock; |
| 45 | struct list_head dyn_callback_list; |
| 46 | spinlock_t dyn_callback_lock; |
| 47 | struct mfd_cell *hid_sensor_hub_client_devs; |
| 48 | int hid_sensor_client_cnt; |
| 49 | unsigned long quirks; |
| 50 | int ref_cnt; |
| 51 | }; |
| 52 | |
| 53 | /** |
| 54 | * struct hid_sensor_hub_callbacks_list - Stores callback list |
| 55 | * @list: list head. |
| 56 | * @usage_id: usage id for a physical device. |
| 57 | * @usage_callback: Stores registered callback functions. |
| 58 | * @priv: Private data for a physical device. |
| 59 | */ |
| 60 | struct hid_sensor_hub_callbacks_list { |
| 61 | struct list_head list; |
| 62 | u32 usage_id; |
| 63 | struct hid_sensor_hub_device *hsdev; |
| 64 | struct hid_sensor_hub_callbacks *usage_callback; |
| 65 | void *priv; |
| 66 | }; |
| 67 | |
| 68 | static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev, |
| 69 | int dir) |
| 70 | { |
| 71 | struct hid_report *report; |
| 72 | |
| 73 | list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) { |
| 74 | if (report->id == id) |
| 75 | return report; |
| 76 | } |
| 77 | hid_warn(hdev, "No report with id 0x%x found\n", id); |
| 78 | |
| 79 | return NULL; |
| 80 | } |
| 81 | |
| 82 | static int sensor_hub_get_physical_device_count(struct hid_device *hdev) |
| 83 | { |
| 84 | int i; |
| 85 | int count = 0; |
| 86 | |
| 87 | for (i = 0; i < hdev->maxcollection; ++i) { |
| 88 | struct hid_collection *collection = &hdev->collection[i]; |
| 89 | if (collection->type == HID_COLLECTION_PHYSICAL || |
| 90 | collection->type == HID_COLLECTION_APPLICATION) |
| 91 | ++count; |
| 92 | } |
| 93 | |
| 94 | return count; |
| 95 | } |
| 96 | |
| 97 | static void sensor_hub_fill_attr_info( |
| 98 | struct hid_sensor_hub_attribute_info *info, |
| 99 | s32 index, s32 report_id, struct hid_field *field) |
| 100 | { |
| 101 | info->index = index; |
| 102 | info->report_id = report_id; |
| 103 | info->units = field->unit; |
| 104 | info->unit_expo = field->unit_exponent; |
| 105 | info->size = (field->report_size * field->report_count)/8; |
| 106 | info->logical_minimum = field->logical_minimum; |
| 107 | info->logical_maximum = field->logical_maximum; |
| 108 | } |
| 109 | |
| 110 | static struct hid_sensor_hub_callbacks *sensor_hub_get_callback( |
| 111 | struct hid_device *hdev, |
| 112 | u32 usage_id, |
| 113 | int collection_index, |
| 114 | struct hid_sensor_hub_device **hsdev, |
| 115 | void **priv) |
| 116 | { |
| 117 | struct hid_sensor_hub_callbacks_list *callback; |
| 118 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
| 119 | unsigned long flags; |
| 120 | |
| 121 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
| 122 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
| 123 | if ((callback->usage_id == usage_id || |
| 124 | callback->usage_id == HID_USAGE_SENSOR_COLLECTION) && |
| 125 | (collection_index >= |
| 126 | callback->hsdev->start_collection_index) && |
| 127 | (collection_index < |
| 128 | callback->hsdev->end_collection_index)) { |
| 129 | *priv = callback->priv; |
| 130 | *hsdev = callback->hsdev; |
| 131 | spin_unlock_irqrestore(&pdata->dyn_callback_lock, |
| 132 | flags); |
| 133 | return callback->usage_callback; |
| 134 | } |
| 135 | spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
| 136 | |
| 137 | return NULL; |
| 138 | } |
| 139 | |
| 140 | int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, |
| 141 | u32 usage_id, |
| 142 | struct hid_sensor_hub_callbacks *usage_callback) |
| 143 | { |
| 144 | struct hid_sensor_hub_callbacks_list *callback; |
| 145 | struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); |
| 146 | unsigned long flags; |
| 147 | |
| 148 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
| 149 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
| 150 | if (callback->usage_id == usage_id && |
| 151 | callback->hsdev == hsdev) { |
| 152 | spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
| 153 | return -EINVAL; |
| 154 | } |
| 155 | callback = kzalloc(sizeof(*callback), GFP_ATOMIC); |
| 156 | if (!callback) { |
| 157 | spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
| 158 | return -ENOMEM; |
| 159 | } |
| 160 | callback->hsdev = hsdev; |
| 161 | callback->usage_callback = usage_callback; |
| 162 | callback->usage_id = usage_id; |
| 163 | callback->priv = NULL; |
| 164 | /* |
| 165 | * If there is a handler registered for the collection type, then |
| 166 | * it will handle all reports for sensors in this collection. If |
| 167 | * there is also an individual sensor handler registration, then |
| 168 | * we want to make sure that the reports are directed to collection |
| 169 | * handler, as this may be a fusion sensor. So add collection handlers |
| 170 | * to the beginning of the list, so that they are matched first. |
| 171 | */ |
| 172 | if (usage_id == HID_USAGE_SENSOR_COLLECTION) |
| 173 | list_add(&callback->list, &pdata->dyn_callback_list); |
| 174 | else |
| 175 | list_add_tail(&callback->list, &pdata->dyn_callback_list); |
| 176 | spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
| 177 | |
| 178 | return 0; |
| 179 | } |
| 180 | EXPORT_SYMBOL_GPL(sensor_hub_register_callback); |
| 181 | |
| 182 | int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, |
| 183 | u32 usage_id) |
| 184 | { |
| 185 | struct hid_sensor_hub_callbacks_list *callback; |
| 186 | struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); |
| 187 | unsigned long flags; |
| 188 | |
| 189 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
| 190 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
| 191 | if (callback->usage_id == usage_id && |
| 192 | callback->hsdev == hsdev) { |
| 193 | list_del(&callback->list); |
| 194 | kfree(callback); |
| 195 | break; |
| 196 | } |
| 197 | spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
| 198 | |
| 199 | return 0; |
| 200 | } |
| 201 | EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); |
| 202 | |
| 203 | int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, |
| 204 | u32 field_index, int buffer_size, void *buffer) |
| 205 | { |
| 206 | struct hid_report *report; |
| 207 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
| 208 | __s32 *buf32 = buffer; |
| 209 | int i = 0; |
| 210 | int remaining_bytes; |
| 211 | __s32 value; |
| 212 | int ret = 0; |
| 213 | |
| 214 | mutex_lock(&data->mutex); |
| 215 | report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); |
| 216 | if (!report || (field_index >= report->maxfield)) { |
| 217 | ret = -EINVAL; |
| 218 | goto done_proc; |
| 219 | } |
| 220 | |
| 221 | remaining_bytes = buffer_size % sizeof(__s32); |
| 222 | buffer_size = buffer_size / sizeof(__s32); |
| 223 | if (buffer_size) { |
| 224 | for (i = 0; i < buffer_size; ++i) { |
| 225 | hid_set_field(report->field[field_index], i, |
| 226 | (__force __s32)cpu_to_le32(*buf32)); |
| 227 | ++buf32; |
| 228 | } |
| 229 | } |
| 230 | if (remaining_bytes) { |
| 231 | value = 0; |
| 232 | memcpy(&value, (u8 *)buf32, remaining_bytes); |
| 233 | hid_set_field(report->field[field_index], i, |
| 234 | (__force __s32)cpu_to_le32(value)); |
| 235 | } |
| 236 | hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT); |
| 237 | hid_hw_wait(hsdev->hdev); |
| 238 | |
| 239 | done_proc: |
| 240 | mutex_unlock(&data->mutex); |
| 241 | |
| 242 | return ret; |
| 243 | } |
| 244 | EXPORT_SYMBOL_GPL(sensor_hub_set_feature); |
| 245 | |
| 246 | int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, |
| 247 | u32 field_index, int buffer_size, void *buffer) |
| 248 | { |
| 249 | struct hid_report *report; |
| 250 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
| 251 | int report_size; |
| 252 | int ret = 0; |
| 253 | |
| 254 | mutex_lock(&data->mutex); |
| 255 | report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); |
| 256 | if (!report || (field_index >= report->maxfield) || |
| 257 | report->field[field_index]->report_count < 1) { |
| 258 | ret = -EINVAL; |
| 259 | goto done_proc; |
| 260 | } |
| 261 | hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); |
| 262 | hid_hw_wait(hsdev->hdev); |
| 263 | |
| 264 | /* calculate number of bytes required to read this field */ |
| 265 | report_size = DIV_ROUND_UP(report->field[field_index]->report_size, |
| 266 | 8) * |
| 267 | report->field[field_index]->report_count; |
| 268 | if (!report_size) { |
| 269 | ret = -EINVAL; |
| 270 | goto done_proc; |
| 271 | } |
| 272 | ret = min(report_size, buffer_size); |
| 273 | memcpy(buffer, report->field[field_index]->value, ret); |
| 274 | |
| 275 | done_proc: |
| 276 | mutex_unlock(&data->mutex); |
| 277 | |
| 278 | return ret; |
| 279 | } |
| 280 | EXPORT_SYMBOL_GPL(sensor_hub_get_feature); |
| 281 | |
| 282 | |
| 283 | int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, |
| 284 | u32 usage_id, |
| 285 | u32 attr_usage_id, u32 report_id, |
| 286 | enum sensor_hub_read_flags flag) |
| 287 | { |
| 288 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
| 289 | unsigned long flags; |
| 290 | struct hid_report *report; |
| 291 | int ret_val = 0; |
| 292 | |
| 293 | report = sensor_hub_report(report_id, hsdev->hdev, |
| 294 | HID_INPUT_REPORT); |
| 295 | if (!report) |
| 296 | return -EINVAL; |
| 297 | |
| 298 | mutex_lock(hsdev->mutex_ptr); |
| 299 | if (flag == SENSOR_HUB_SYNC) { |
| 300 | memset(&hsdev->pending, 0, sizeof(hsdev->pending)); |
| 301 | init_completion(&hsdev->pending.ready); |
| 302 | hsdev->pending.usage_id = usage_id; |
| 303 | hsdev->pending.attr_usage_id = attr_usage_id; |
| 304 | hsdev->pending.raw_size = 0; |
| 305 | |
| 306 | spin_lock_irqsave(&data->lock, flags); |
| 307 | hsdev->pending.status = true; |
| 308 | spin_unlock_irqrestore(&data->lock, flags); |
| 309 | } |
| 310 | mutex_lock(&data->mutex); |
| 311 | hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); |
| 312 | mutex_unlock(&data->mutex); |
| 313 | if (flag == SENSOR_HUB_SYNC) { |
| 314 | wait_for_completion_interruptible_timeout( |
| 315 | &hsdev->pending.ready, HZ*5); |
| 316 | switch (hsdev->pending.raw_size) { |
| 317 | case 1: |
| 318 | ret_val = *(u8 *)hsdev->pending.raw_data; |
| 319 | break; |
| 320 | case 2: |
| 321 | ret_val = *(u16 *)hsdev->pending.raw_data; |
| 322 | break; |
| 323 | case 4: |
| 324 | ret_val = *(u32 *)hsdev->pending.raw_data; |
| 325 | break; |
| 326 | default: |
| 327 | ret_val = 0; |
| 328 | } |
| 329 | kfree(hsdev->pending.raw_data); |
| 330 | hsdev->pending.status = false; |
| 331 | } |
| 332 | mutex_unlock(hsdev->mutex_ptr); |
| 333 | |
| 334 | return ret_val; |
| 335 | } |
| 336 | EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); |
| 337 | |
| 338 | int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, |
| 339 | u32 report_id, int field_index, u32 usage_id) |
| 340 | { |
| 341 | struct hid_report *report; |
| 342 | struct hid_field *field; |
| 343 | int i; |
| 344 | |
| 345 | report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); |
| 346 | if (!report || (field_index >= report->maxfield)) |
| 347 | goto done_proc; |
| 348 | |
| 349 | field = report->field[field_index]; |
| 350 | for (i = 0; i < field->maxusage; ++i) { |
| 351 | if (field->usage[i].hid == usage_id) |
| 352 | return field->usage[i].usage_index; |
| 353 | } |
| 354 | |
| 355 | done_proc: |
| 356 | return -EINVAL; |
| 357 | } |
| 358 | EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); |
| 359 | |
| 360 | int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, |
| 361 | u8 type, |
| 362 | u32 usage_id, |
| 363 | u32 attr_usage_id, |
| 364 | struct hid_sensor_hub_attribute_info *info) |
| 365 | { |
| 366 | int ret = -1; |
| 367 | int i; |
| 368 | struct hid_report *report; |
| 369 | struct hid_field *field; |
| 370 | struct hid_report_enum *report_enum; |
| 371 | struct hid_device *hdev = hsdev->hdev; |
| 372 | |
| 373 | /* Initialize with defaults */ |
| 374 | info->usage_id = usage_id; |
| 375 | info->attrib_id = attr_usage_id; |
| 376 | info->report_id = -1; |
| 377 | info->index = -1; |
| 378 | info->units = -1; |
| 379 | info->unit_expo = -1; |
| 380 | |
| 381 | report_enum = &hdev->report_enum[type]; |
| 382 | list_for_each_entry(report, &report_enum->report_list, list) { |
| 383 | for (i = 0; i < report->maxfield; ++i) { |
| 384 | field = report->field[i]; |
| 385 | if (field->maxusage) { |
| 386 | if (field->physical == usage_id && |
| 387 | (field->logical == attr_usage_id || |
| 388 | field->usage[0].hid == |
| 389 | attr_usage_id) && |
| 390 | (field->usage[0].collection_index >= |
| 391 | hsdev->start_collection_index) && |
| 392 | (field->usage[0].collection_index < |
| 393 | hsdev->end_collection_index)) { |
| 394 | |
| 395 | sensor_hub_fill_attr_info(info, i, |
| 396 | report->id, |
| 397 | field); |
| 398 | ret = 0; |
| 399 | break; |
| 400 | } |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | } |
| 405 | |
| 406 | return ret; |
| 407 | } |
| 408 | EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); |
| 409 | |
| 410 | #ifdef CONFIG_PM |
| 411 | static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) |
| 412 | { |
| 413 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
| 414 | struct hid_sensor_hub_callbacks_list *callback; |
| 415 | unsigned long flags; |
| 416 | |
| 417 | hid_dbg(hdev, " sensor_hub_suspend\n"); |
| 418 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
| 419 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) { |
| 420 | if (callback->usage_callback->suspend) |
| 421 | callback->usage_callback->suspend( |
| 422 | callback->hsdev, callback->priv); |
| 423 | } |
| 424 | spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
| 425 | |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | static int sensor_hub_resume(struct hid_device *hdev) |
| 430 | { |
| 431 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
| 432 | struct hid_sensor_hub_callbacks_list *callback; |
| 433 | unsigned long flags; |
| 434 | |
| 435 | hid_dbg(hdev, " sensor_hub_resume\n"); |
| 436 | spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
| 437 | list_for_each_entry(callback, &pdata->dyn_callback_list, list) { |
| 438 | if (callback->usage_callback->resume) |
| 439 | callback->usage_callback->resume( |
| 440 | callback->hsdev, callback->priv); |
| 441 | } |
| 442 | spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
| 443 | |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | static int sensor_hub_reset_resume(struct hid_device *hdev) |
| 448 | { |
| 449 | return 0; |
| 450 | } |
| 451 | #endif |
| 452 | |
| 453 | /* |
| 454 | * Handle raw report as sent by device |
| 455 | */ |
| 456 | static int sensor_hub_raw_event(struct hid_device *hdev, |
| 457 | struct hid_report *report, u8 *raw_data, int size) |
| 458 | { |
| 459 | int i; |
| 460 | u8 *ptr; |
| 461 | int sz; |
| 462 | struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
| 463 | unsigned long flags; |
| 464 | struct hid_sensor_hub_callbacks *callback = NULL; |
| 465 | struct hid_collection *collection = NULL; |
| 466 | void *priv = NULL; |
| 467 | struct hid_sensor_hub_device *hsdev = NULL; |
| 468 | |
| 469 | hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", |
| 470 | report->id, size, report->type); |
| 471 | hid_dbg(hdev, "maxfield:%d\n", report->maxfield); |
| 472 | if (report->type != HID_INPUT_REPORT) |
| 473 | return 1; |
| 474 | |
| 475 | ptr = raw_data; |
| 476 | ptr++; /* Skip report id */ |
| 477 | |
| 478 | spin_lock_irqsave(&pdata->lock, flags); |
| 479 | |
| 480 | for (i = 0; i < report->maxfield; ++i) { |
| 481 | hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", |
| 482 | i, report->field[i]->usage->collection_index, |
| 483 | report->field[i]->usage->hid, |
| 484 | (report->field[i]->report_size * |
| 485 | report->field[i]->report_count)/8); |
| 486 | sz = (report->field[i]->report_size * |
| 487 | report->field[i]->report_count)/8; |
| 488 | collection = &hdev->collection[ |
| 489 | report->field[i]->usage->collection_index]; |
| 490 | hid_dbg(hdev, "collection->usage %x\n", |
| 491 | collection->usage); |
| 492 | |
| 493 | callback = sensor_hub_get_callback(hdev, |
| 494 | report->field[i]->physical, |
| 495 | report->field[i]->usage[0].collection_index, |
| 496 | &hsdev, &priv); |
| 497 | if (!callback) { |
| 498 | ptr += sz; |
| 499 | continue; |
| 500 | } |
| 501 | if (hsdev->pending.status && (hsdev->pending.attr_usage_id == |
| 502 | report->field[i]->usage->hid || |
| 503 | hsdev->pending.attr_usage_id == |
| 504 | report->field[i]->logical)) { |
| 505 | hid_dbg(hdev, "data was pending ...\n"); |
| 506 | hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); |
| 507 | if (hsdev->pending.raw_data) |
| 508 | hsdev->pending.raw_size = sz; |
| 509 | else |
| 510 | hsdev->pending.raw_size = 0; |
| 511 | complete(&hsdev->pending.ready); |
| 512 | } |
| 513 | if (callback->capture_sample) { |
| 514 | if (report->field[i]->logical) |
| 515 | callback->capture_sample(hsdev, |
| 516 | report->field[i]->logical, sz, ptr, |
| 517 | callback->pdev); |
| 518 | else |
| 519 | callback->capture_sample(hsdev, |
| 520 | report->field[i]->usage->hid, sz, ptr, |
| 521 | callback->pdev); |
| 522 | } |
| 523 | ptr += sz; |
| 524 | } |
| 525 | if (callback && collection && callback->send_event) |
| 526 | callback->send_event(hsdev, collection->usage, |
| 527 | callback->pdev); |
| 528 | spin_unlock_irqrestore(&pdata->lock, flags); |
| 529 | |
| 530 | return 1; |
| 531 | } |
| 532 | |
| 533 | int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) |
| 534 | { |
| 535 | int ret = 0; |
| 536 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
| 537 | |
| 538 | mutex_lock(&data->mutex); |
| 539 | if (!data->ref_cnt) { |
| 540 | ret = hid_hw_open(hsdev->hdev); |
| 541 | if (ret) { |
| 542 | hid_err(hsdev->hdev, "failed to open hid device\n"); |
| 543 | mutex_unlock(&data->mutex); |
| 544 | return ret; |
| 545 | } |
| 546 | } |
| 547 | data->ref_cnt++; |
| 548 | mutex_unlock(&data->mutex); |
| 549 | |
| 550 | return ret; |
| 551 | } |
| 552 | EXPORT_SYMBOL_GPL(sensor_hub_device_open); |
| 553 | |
| 554 | void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) |
| 555 | { |
| 556 | struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
| 557 | |
| 558 | mutex_lock(&data->mutex); |
| 559 | data->ref_cnt--; |
| 560 | if (!data->ref_cnt) |
| 561 | hid_hw_close(hsdev->hdev); |
| 562 | mutex_unlock(&data->mutex); |
| 563 | } |
| 564 | EXPORT_SYMBOL_GPL(sensor_hub_device_close); |
| 565 | |
| 566 | static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
| 567 | unsigned int *rsize) |
| 568 | { |
| 569 | int index; |
| 570 | struct sensor_hub_data *sd = hid_get_drvdata(hdev); |
| 571 | unsigned char report_block[] = { |
| 572 | 0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05}; |
| 573 | unsigned char power_block[] = { |
| 574 | 0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05}; |
| 575 | |
| 576 | if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) { |
| 577 | hid_dbg(hdev, "No Enum quirks\n"); |
| 578 | return rdesc; |
| 579 | } |
| 580 | |
| 581 | /* Looks for power and report state usage id and force to 1 */ |
| 582 | for (index = 0; index < *rsize; ++index) { |
| 583 | if (((*rsize - index) > sizeof(report_block)) && |
| 584 | !memcmp(&rdesc[index], report_block, |
| 585 | sizeof(report_block))) { |
| 586 | rdesc[index + 4] = 0x01; |
| 587 | index += sizeof(report_block); |
| 588 | } |
| 589 | if (((*rsize - index) > sizeof(power_block)) && |
| 590 | !memcmp(&rdesc[index], power_block, |
| 591 | sizeof(power_block))) { |
| 592 | rdesc[index + 4] = 0x01; |
| 593 | index += sizeof(power_block); |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | /* Checks if the report descriptor of Thinkpad Helix 2 has a logical |
| 598 | * minimum for magnetic flux axis greater than the maximum */ |
| 599 | if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && |
| 600 | *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && |
| 601 | rdesc[915] == 0x81 && rdesc[916] == 0x08 && |
| 602 | rdesc[917] == 0x00 && rdesc[918] == 0x27 && |
| 603 | rdesc[921] == 0x07 && rdesc[922] == 0x00) { |
| 604 | /* Sets negative logical minimum for mag x, y and z */ |
| 605 | rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; |
| 606 | rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; |
| 607 | rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; |
| 608 | rdesc[917] = rdesc[938] = rdesc[959] = 0xff; |
| 609 | } |
| 610 | |
| 611 | return rdesc; |
| 612 | } |
| 613 | |
| 614 | static int sensor_hub_probe(struct hid_device *hdev, |
| 615 | const struct hid_device_id *id) |
| 616 | { |
| 617 | int ret; |
| 618 | struct sensor_hub_data *sd; |
| 619 | int i; |
| 620 | char *name; |
| 621 | int dev_cnt; |
| 622 | struct hid_sensor_hub_device *hsdev; |
| 623 | struct hid_sensor_hub_device *last_hsdev = NULL; |
| 624 | struct hid_sensor_hub_device *collection_hsdev = NULL; |
| 625 | |
| 626 | sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); |
| 627 | if (!sd) { |
| 628 | hid_err(hdev, "cannot allocate Sensor data\n"); |
| 629 | return -ENOMEM; |
| 630 | } |
| 631 | |
| 632 | hid_set_drvdata(hdev, sd); |
| 633 | sd->quirks = id->driver_data; |
| 634 | |
| 635 | spin_lock_init(&sd->lock); |
| 636 | spin_lock_init(&sd->dyn_callback_lock); |
| 637 | mutex_init(&sd->mutex); |
| 638 | ret = hid_parse(hdev); |
| 639 | if (ret) { |
| 640 | hid_err(hdev, "parse failed\n"); |
| 641 | return ret; |
| 642 | } |
| 643 | INIT_LIST_HEAD(&hdev->inputs); |
| 644 | |
| 645 | ret = hid_hw_start(hdev, 0); |
| 646 | if (ret) { |
| 647 | hid_err(hdev, "hw start failed\n"); |
| 648 | return ret; |
| 649 | } |
| 650 | INIT_LIST_HEAD(&sd->dyn_callback_list); |
| 651 | sd->hid_sensor_client_cnt = 0; |
| 652 | |
| 653 | dev_cnt = sensor_hub_get_physical_device_count(hdev); |
| 654 | if (dev_cnt > HID_MAX_PHY_DEVICES) { |
| 655 | hid_err(hdev, "Invalid Physical device count\n"); |
| 656 | ret = -EINVAL; |
| 657 | goto err_stop_hw; |
| 658 | } |
| 659 | sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt * |
| 660 | sizeof(struct mfd_cell), |
| 661 | GFP_KERNEL); |
| 662 | if (sd->hid_sensor_hub_client_devs == NULL) { |
| 663 | hid_err(hdev, "Failed to allocate memory for mfd cells\n"); |
| 664 | ret = -ENOMEM; |
| 665 | goto err_stop_hw; |
| 666 | } |
| 667 | |
| 668 | for (i = 0; i < hdev->maxcollection; ++i) { |
| 669 | struct hid_collection *collection = &hdev->collection[i]; |
| 670 | |
| 671 | if (collection->type == HID_COLLECTION_PHYSICAL || |
| 672 | collection->type == HID_COLLECTION_APPLICATION) { |
| 673 | |
| 674 | hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), |
| 675 | GFP_KERNEL); |
| 676 | if (!hsdev) { |
| 677 | hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); |
| 678 | ret = -ENOMEM; |
| 679 | goto err_stop_hw; |
| 680 | } |
| 681 | hsdev->hdev = hdev; |
| 682 | hsdev->vendor_id = hdev->vendor; |
| 683 | hsdev->product_id = hdev->product; |
| 684 | hsdev->usage = collection->usage; |
| 685 | hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, |
| 686 | sizeof(struct mutex), |
| 687 | GFP_KERNEL); |
| 688 | if (!hsdev->mutex_ptr) { |
| 689 | ret = -ENOMEM; |
| 690 | goto err_stop_hw; |
| 691 | } |
| 692 | mutex_init(hsdev->mutex_ptr); |
| 693 | hsdev->start_collection_index = i; |
| 694 | if (last_hsdev) |
| 695 | last_hsdev->end_collection_index = i; |
| 696 | last_hsdev = hsdev; |
| 697 | name = devm_kasprintf(&hdev->dev, GFP_KERNEL, |
| 698 | "HID-SENSOR-%x", |
| 699 | collection->usage); |
| 700 | if (name == NULL) { |
| 701 | hid_err(hdev, "Failed MFD device name\n"); |
| 702 | ret = -ENOMEM; |
| 703 | goto err_stop_hw; |
| 704 | } |
| 705 | sd->hid_sensor_hub_client_devs[ |
| 706 | sd->hid_sensor_client_cnt].name = name; |
| 707 | sd->hid_sensor_hub_client_devs[ |
| 708 | sd->hid_sensor_client_cnt].platform_data = |
| 709 | hsdev; |
| 710 | sd->hid_sensor_hub_client_devs[ |
| 711 | sd->hid_sensor_client_cnt].pdata_size = |
| 712 | sizeof(*hsdev); |
| 713 | hid_dbg(hdev, "Adding %s:%d\n", name, |
| 714 | hsdev->start_collection_index); |
| 715 | sd->hid_sensor_client_cnt++; |
| 716 | if (collection_hsdev) |
| 717 | collection_hsdev->end_collection_index = i; |
| 718 | if (collection->type == HID_COLLECTION_APPLICATION && |
| 719 | collection->usage == HID_USAGE_SENSOR_COLLECTION) |
| 720 | collection_hsdev = hsdev; |
| 721 | } |
| 722 | } |
| 723 | if (last_hsdev) |
| 724 | last_hsdev->end_collection_index = i; |
| 725 | if (collection_hsdev) |
| 726 | collection_hsdev->end_collection_index = i; |
| 727 | |
| 728 | ret = mfd_add_hotplug_devices(&hdev->dev, |
| 729 | sd->hid_sensor_hub_client_devs, |
| 730 | sd->hid_sensor_client_cnt); |
| 731 | if (ret < 0) |
| 732 | goto err_stop_hw; |
| 733 | |
| 734 | return ret; |
| 735 | |
| 736 | err_stop_hw: |
| 737 | hid_hw_stop(hdev); |
| 738 | |
| 739 | return ret; |
| 740 | } |
| 741 | |
| 742 | static void sensor_hub_remove(struct hid_device *hdev) |
| 743 | { |
| 744 | struct sensor_hub_data *data = hid_get_drvdata(hdev); |
| 745 | unsigned long flags; |
| 746 | int i; |
| 747 | |
| 748 | hid_dbg(hdev, " hardware removed\n"); |
| 749 | hid_hw_close(hdev); |
| 750 | hid_hw_stop(hdev); |
| 751 | spin_lock_irqsave(&data->lock, flags); |
| 752 | for (i = 0; i < data->hid_sensor_client_cnt; ++i) { |
| 753 | struct hid_sensor_hub_device *hsdev = |
| 754 | data->hid_sensor_hub_client_devs[i].platform_data; |
| 755 | if (hsdev->pending.status) |
| 756 | complete(&hsdev->pending.ready); |
| 757 | } |
| 758 | spin_unlock_irqrestore(&data->lock, flags); |
| 759 | mfd_remove_devices(&hdev->dev); |
| 760 | hid_set_drvdata(hdev, NULL); |
| 761 | mutex_destroy(&data->mutex); |
| 762 | } |
| 763 | |
| 764 | static const struct hid_device_id sensor_hub_devices[] = { |
| 765 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0, |
| 766 | USB_DEVICE_ID_INTEL_HID_SENSOR_0), |
| 767 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 768 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, |
| 769 | USB_DEVICE_ID_INTEL_HID_SENSOR_0), |
| 770 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 771 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, |
| 772 | USB_DEVICE_ID_INTEL_HID_SENSOR_1), |
| 773 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 774 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, |
| 775 | USB_DEVICE_ID_MS_SURFACE_PRO_2), |
| 776 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 777 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, |
| 778 | USB_DEVICE_ID_MS_TOUCH_COVER_2), |
| 779 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 780 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, |
| 781 | USB_DEVICE_ID_MS_TYPE_COVER_2), |
| 782 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 783 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, |
| 784 | USB_DEVICE_ID_STM_HID_SENSOR), |
| 785 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 786 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, |
| 787 | USB_DEVICE_ID_STM_HID_SENSOR_1), |
| 788 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 789 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS, |
| 790 | USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA), |
| 791 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 792 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, |
| 793 | USB_DEVICE_ID_ITE_LENOVO_YOGA), |
| 794 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 795 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, |
| 796 | USB_DEVICE_ID_ITE_LENOVO_YOGA2), |
| 797 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 798 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, |
| 799 | USB_DEVICE_ID_ITE_LENOVO_YOGA900), |
| 800 | .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, |
| 801 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, |
| 802 | HID_ANY_ID) }, |
| 803 | { } |
| 804 | }; |
| 805 | MODULE_DEVICE_TABLE(hid, sensor_hub_devices); |
| 806 | |
| 807 | static struct hid_driver sensor_hub_driver = { |
| 808 | .name = "hid-sensor-hub", |
| 809 | .id_table = sensor_hub_devices, |
| 810 | .probe = sensor_hub_probe, |
| 811 | .remove = sensor_hub_remove, |
| 812 | .raw_event = sensor_hub_raw_event, |
| 813 | .report_fixup = sensor_hub_report_fixup, |
| 814 | #ifdef CONFIG_PM |
| 815 | .suspend = sensor_hub_suspend, |
| 816 | .resume = sensor_hub_resume, |
| 817 | .reset_resume = sensor_hub_reset_resume, |
| 818 | #endif |
| 819 | }; |
| 820 | module_hid_driver(sensor_hub_driver); |
| 821 | |
| 822 | MODULE_DESCRIPTION("HID Sensor Hub driver"); |
| 823 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); |
| 824 | MODULE_LICENSE("GPL"); |