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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * hid-sensor-custom.c4 * Copyright (c) 2015, Intel Corporation.5 */6 7#include <linux/ctype.h>8#include <linux/dmi.h>9#include <linux/kernel.h>10#include <linux/module.h>11#include <linux/init.h>12#include <linux/miscdevice.h>13#include <linux/kfifo.h>14#include <linux/sched.h>15#include <linux/wait.h>16#include <linux/poll.h>17#include <linux/bsearch.h>18#include <linux/platform_device.h>19#include <linux/hid-sensor-hub.h>20 21#define HID_CUSTOM_NAME_LENGTH 6422#define HID_CUSTOM_MAX_CORE_ATTRS 1023#define HID_CUSTOM_TOTAL_ATTRS (HID_CUSTOM_MAX_CORE_ATTRS + 1)24#define HID_CUSTOM_FIFO_SIZE 409625#define HID_CUSTOM_MAX_FEATURE_BYTES 6426#define HID_SENSOR_USAGE_LENGTH (4 + 1)27 28struct hid_sensor_custom_field {29 int report_id;30 char group_name[HID_CUSTOM_NAME_LENGTH];31 struct hid_sensor_hub_attribute_info attribute;32 struct device_attribute sd_attrs[HID_CUSTOM_MAX_CORE_ATTRS];33 char attr_name[HID_CUSTOM_TOTAL_ATTRS][HID_CUSTOM_NAME_LENGTH];34 struct attribute *attrs[HID_CUSTOM_TOTAL_ATTRS];35 struct attribute_group hid_custom_attribute_group;36};37 38struct hid_sensor_custom {39 struct mutex mutex;40 struct platform_device *pdev;41 struct hid_sensor_hub_device *hsdev;42 struct hid_sensor_hub_callbacks callbacks;43 int sensor_field_count;44 struct hid_sensor_custom_field *fields;45 int input_field_count;46 int input_report_size;47 int input_report_recd_size;48 bool input_skip_sample;49 bool enable;50 struct hid_sensor_custom_field *power_state;51 struct hid_sensor_custom_field *report_state;52 struct miscdevice custom_dev;53 struct kfifo data_fifo;54 unsigned long misc_opened;55 wait_queue_head_t wait;56 struct platform_device *custom_pdev;57};58 59/* Header for each sample to user space via dev interface */60struct hid_sensor_sample {61 u32 usage_id;62 u64 timestamp;63 u32 raw_len;64} __packed;65 66static struct attribute hid_custom_attrs[HID_CUSTOM_TOTAL_ATTRS] = {67 {.name = "name", .mode = S_IRUGO},68 {.name = "units", .mode = S_IRUGO},69 {.name = "unit-expo", .mode = S_IRUGO},70 {.name = "minimum", .mode = S_IRUGO},71 {.name = "maximum", .mode = S_IRUGO},72 {.name = "size", .mode = S_IRUGO},73 {.name = "value", .mode = S_IWUSR | S_IRUGO},74 {.name = NULL}75};76 77static const struct hid_custom_usage_desc {78 int usage_id;79 char *desc;80} hid_custom_usage_desc_table[] = {81 {0x200201, "event-sensor-state"},82 {0x200202, "event-sensor-event"},83 {0x200301, "property-friendly-name"},84 {0x200302, "property-persistent-unique-id"},85 {0x200303, "property-sensor-status"},86 {0x200304, "property-min-report-interval"},87 {0x200305, "property-sensor-manufacturer"},88 {0x200306, "property-sensor-model"},89 {0x200307, "property-sensor-serial-number"},90 {0x200308, "property-sensor-description"},91 {0x200309, "property-sensor-connection-type"},92 {0x20030A, "property-sensor-device-path"},93 {0x20030B, "property-hardware-revision"},94 {0x20030C, "property-firmware-version"},95 {0x20030D, "property-release-date"},96 {0x20030E, "property-report-interval"},97 {0x20030F, "property-change-sensitivity-absolute"},98 {0x200310, "property-change-sensitivity-percent-range"},99 {0x200311, "property-change-sensitivity-percent-relative"},100 {0x200312, "property-accuracy"},101 {0x200313, "property-resolution"},102 {0x200314, "property-maximum"},103 {0x200315, "property-minimum"},104 {0x200316, "property-reporting-state"},105 {0x200317, "property-sampling-rate"},106 {0x200318, "property-response-curve"},107 {0x200319, "property-power-state"},108 {0x200540, "data-field-custom"},109 {0x200541, "data-field-custom-usage"},110 {0x200542, "data-field-custom-boolean-array"},111 {0x200543, "data-field-custom-value"},112 {0x200544, "data-field-custom-value_1"},113 {0x200545, "data-field-custom-value_2"},114 {0x200546, "data-field-custom-value_3"},115 {0x200547, "data-field-custom-value_4"},116 {0x200548, "data-field-custom-value_5"},117 {0x200549, "data-field-custom-value_6"},118 {0x20054A, "data-field-custom-value_7"},119 {0x20054B, "data-field-custom-value_8"},120 {0x20054C, "data-field-custom-value_9"},121 {0x20054D, "data-field-custom-value_10"},122 {0x20054E, "data-field-custom-value_11"},123 {0x20054F, "data-field-custom-value_12"},124 {0x200550, "data-field-custom-value_13"},125 {0x200551, "data-field-custom-value_14"},126 {0x200552, "data-field-custom-value_15"},127 {0x200553, "data-field-custom-value_16"},128 {0x200554, "data-field-custom-value_17"},129 {0x200555, "data-field-custom-value_18"},130 {0x200556, "data-field-custom-value_19"},131 {0x200557, "data-field-custom-value_20"},132 {0x200558, "data-field-custom-value_21"},133 {0x200559, "data-field-custom-value_22"},134 {0x20055A, "data-field-custom-value_23"},135 {0x20055B, "data-field-custom-value_24"},136 {0x20055C, "data-field-custom-value_25"},137 {0x20055D, "data-field-custom-value_26"},138 {0x20055E, "data-field-custom-value_27"},139 {0x20055F, "data-field-custom-value_28"},140};141 142static int usage_id_cmp(const void *p1, const void *p2)143{144 if (*(int *)p1 < *(int *)p2)145 return -1;146 147 if (*(int *)p1 > *(int *)p2)148 return 1;149 150 return 0;151}152 153static ssize_t enable_sensor_show(struct device *dev,154 struct device_attribute *attr, char *buf)155{156 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);157 158 return sysfs_emit(buf, "%d\n", sensor_inst->enable);159}160 161static int set_power_report_state(struct hid_sensor_custom *sensor_inst,162 bool state)163{164 int power_val = -1;165 int report_val = -1;166 u32 power_state_usage_id;167 u32 report_state_usage_id;168 int ret;169 170 /*171 * It is possible that the power/report state ids are not present.172 * In this case this function will return success. But if the173 * ids are present, then it will return error if set fails.174 */175 if (state) {176 power_state_usage_id =177 HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM;178 report_state_usage_id =179 HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM;180 } else {181 power_state_usage_id =182 HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM;183 report_state_usage_id =184 HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM;185 }186 187 if (sensor_inst->power_state)188 power_val = hid_sensor_get_usage_index(sensor_inst->hsdev,189 sensor_inst->power_state->attribute.report_id,190 sensor_inst->power_state->attribute.index,191 power_state_usage_id);192 if (sensor_inst->report_state)193 report_val = hid_sensor_get_usage_index(sensor_inst->hsdev,194 sensor_inst->report_state->attribute.report_id,195 sensor_inst->report_state->attribute.index,196 report_state_usage_id);197 198 if (power_val >= 0) {199 power_val +=200 sensor_inst->power_state->attribute.logical_minimum;201 ret = sensor_hub_set_feature(sensor_inst->hsdev,202 sensor_inst->power_state->attribute.report_id,203 sensor_inst->power_state->attribute.index,204 sizeof(power_val),205 &power_val);206 if (ret) {207 hid_err(sensor_inst->hsdev->hdev,208 "Set power state failed\n");209 return ret;210 }211 }212 213 if (report_val >= 0) {214 report_val +=215 sensor_inst->report_state->attribute.logical_minimum;216 ret = sensor_hub_set_feature(sensor_inst->hsdev,217 sensor_inst->report_state->attribute.report_id,218 sensor_inst->report_state->attribute.index,219 sizeof(report_val),220 &report_val);221 if (ret) {222 hid_err(sensor_inst->hsdev->hdev,223 "Set report state failed\n");224 return ret;225 }226 }227 228 return 0;229}230 231static ssize_t enable_sensor_store(struct device *dev,232 struct device_attribute *attr,233 const char *buf, size_t count)234{235 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);236 int value;237 int ret = -EINVAL;238 239 if (kstrtoint(buf, 0, &value) != 0)240 return -EINVAL;241 242 mutex_lock(&sensor_inst->mutex);243 if (value && !sensor_inst->enable) {244 ret = sensor_hub_device_open(sensor_inst->hsdev);245 if (ret)246 goto unlock_state;247 248 ret = set_power_report_state(sensor_inst, true);249 if (ret) {250 sensor_hub_device_close(sensor_inst->hsdev);251 goto unlock_state;252 }253 sensor_inst->enable = true;254 } else if (!value && sensor_inst->enable) {255 ret = set_power_report_state(sensor_inst, false);256 sensor_hub_device_close(sensor_inst->hsdev);257 sensor_inst->enable = false;258 }259unlock_state:260 mutex_unlock(&sensor_inst->mutex);261 if (ret < 0)262 return ret;263 264 return count;265}266static DEVICE_ATTR_RW(enable_sensor);267 268static struct attribute *enable_sensor_attrs[] = {269 &dev_attr_enable_sensor.attr,270 NULL,271};272 273static const struct attribute_group enable_sensor_attr_group = {274 .attrs = enable_sensor_attrs,275};276 277static ssize_t show_value(struct device *dev, struct device_attribute *attr,278 char *buf)279{280 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);281 struct hid_sensor_hub_attribute_info *attribute;282 int index, usage, field_index;283 char name[HID_CUSTOM_NAME_LENGTH];284 bool feature = false;285 bool input = false;286 int value = 0;287 288 if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage,289 name) == 3) {290 feature = true;291 field_index = index + sensor_inst->input_field_count;292 } else if (sscanf(attr->attr.name, "input-%x-%x-%s", &index, &usage,293 name) == 3) {294 input = true;295 field_index = index;296 } else297 return -EINVAL;298 299 if (!strncmp(name, "value", strlen("value"))) {300 u32 report_id;301 int ret;302 303 attribute = &sensor_inst->fields[field_index].attribute;304 report_id = attribute->report_id;305 if (feature) {306 u8 values[HID_CUSTOM_MAX_FEATURE_BYTES];307 int len = 0;308 u64 value = 0;309 int i = 0;310 311 ret = sensor_hub_get_feature(sensor_inst->hsdev,312 report_id,313 index,314 sizeof(values), values);315 if (ret < 0)316 return ret;317 318 while (i < ret) {319 if (i + attribute->size > ret) {320 len += scnprintf(&buf[len],321 PAGE_SIZE - len,322 "%d ", values[i]);323 break;324 }325 switch (attribute->size) {326 case 2:327 value = (u64) *(u16 *)&values[i];328 i += attribute->size;329 break;330 case 4:331 value = (u64) *(u32 *)&values[i];332 i += attribute->size;333 break;334 case 8:335 value = *(u64 *)&values[i];336 i += attribute->size;337 break;338 default:339 value = (u64) values[i];340 ++i;341 break;342 }343 len += scnprintf(&buf[len], PAGE_SIZE - len,344 "%lld ", value);345 }346 len += scnprintf(&buf[len], PAGE_SIZE - len, "\n");347 348 return len;349 } else if (input)350 value = sensor_hub_input_attr_get_raw_value(351 sensor_inst->hsdev,352 sensor_inst->hsdev->usage,353 usage, report_id,354 SENSOR_HUB_SYNC, false);355 } else if (!strncmp(name, "units", strlen("units")))356 value = sensor_inst->fields[field_index].attribute.units;357 else if (!strncmp(name, "unit-expo", strlen("unit-expo")))358 value = sensor_inst->fields[field_index].attribute.unit_expo;359 else if (!strncmp(name, "size", strlen("size")))360 value = sensor_inst->fields[field_index].attribute.size;361 else if (!strncmp(name, "minimum", strlen("minimum")))362 value = sensor_inst->fields[field_index].attribute.363 logical_minimum;364 else if (!strncmp(name, "maximum", strlen("maximum")))365 value = sensor_inst->fields[field_index].attribute.366 logical_maximum;367 else if (!strncmp(name, "name", strlen("name"))) {368 struct hid_custom_usage_desc *usage_desc;369 370 usage_desc = bsearch(&usage, hid_custom_usage_desc_table,371 ARRAY_SIZE(hid_custom_usage_desc_table),372 sizeof(struct hid_custom_usage_desc),373 usage_id_cmp);374 if (usage_desc)375 return sysfs_emit(buf, "%s\n", usage_desc->desc);376 else377 return sysfs_emit(buf, "not-specified\n");378 } else379 return -EINVAL;380 381 return sysfs_emit(buf, "%d\n", value);382}383 384static ssize_t store_value(struct device *dev, struct device_attribute *attr,385 const char *buf, size_t count)386{387 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);388 int index, field_index, usage;389 char name[HID_CUSTOM_NAME_LENGTH];390 int value, ret;391 392 if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage,393 name) == 3) {394 field_index = index + sensor_inst->input_field_count;395 } else396 return -EINVAL;397 398 if (!strncmp(name, "value", strlen("value"))) {399 u32 report_id;400 401 if (kstrtoint(buf, 0, &value) != 0)402 return -EINVAL;403 404 report_id = sensor_inst->fields[field_index].attribute.405 report_id;406 ret = sensor_hub_set_feature(sensor_inst->hsdev, report_id,407 index, sizeof(value), &value);408 if (ret)409 return ret;410 } else411 return -EINVAL;412 413 return count;414}415 416static int hid_sensor_capture_sample(struct hid_sensor_hub_device *hsdev,417 unsigned usage_id, size_t raw_len,418 char *raw_data, void *priv)419{420 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv);421 struct hid_sensor_sample header;422 423 /* If any error occurs in a sample, rest of the fields are ignored */424 if (sensor_inst->input_skip_sample) {425 hid_err(sensor_inst->hsdev->hdev, "Skipped remaining data\n");426 return 0;427 }428 429 hid_dbg(sensor_inst->hsdev->hdev, "%s received %d of %d\n", __func__,430 (int) (sensor_inst->input_report_recd_size + raw_len),431 sensor_inst->input_report_size);432 433 if (!test_bit(0, &sensor_inst->misc_opened))434 return 0;435 436 if (!sensor_inst->input_report_recd_size) {437 int required_size = sizeof(struct hid_sensor_sample) +438 sensor_inst->input_report_size;439 header.usage_id = hsdev->usage;440 header.raw_len = sensor_inst->input_report_size;441 header.timestamp = ktime_get_real_ns();442 if (kfifo_avail(&sensor_inst->data_fifo) >= required_size) {443 kfifo_in(&sensor_inst->data_fifo,444 (unsigned char *)&header,445 sizeof(header));446 } else447 sensor_inst->input_skip_sample = true;448 }449 if (kfifo_avail(&sensor_inst->data_fifo) >= raw_len)450 kfifo_in(&sensor_inst->data_fifo, (unsigned char *)raw_data,451 raw_len);452 453 sensor_inst->input_report_recd_size += raw_len;454 455 return 0;456}457 458static int hid_sensor_send_event(struct hid_sensor_hub_device *hsdev,459 unsigned usage_id, void *priv)460{461 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv);462 463 if (!test_bit(0, &sensor_inst->misc_opened))464 return 0;465 466 sensor_inst->input_report_recd_size = 0;467 sensor_inst->input_skip_sample = false;468 469 wake_up(&sensor_inst->wait);470 471 return 0;472}473 474static int hid_sensor_custom_add_field(struct hid_sensor_custom *sensor_inst,475 int index, int report_type,476 struct hid_report *report,477 struct hid_field *field)478{479 struct hid_sensor_custom_field *sensor_field;480 void *fields;481 482 fields = krealloc(sensor_inst->fields,483 (sensor_inst->sensor_field_count + 1) *484 sizeof(struct hid_sensor_custom_field), GFP_KERNEL);485 if (!fields) {486 kfree(sensor_inst->fields);487 return -ENOMEM;488 }489 sensor_inst->fields = fields;490 sensor_field = &sensor_inst->fields[sensor_inst->sensor_field_count];491 sensor_field->attribute.usage_id = sensor_inst->hsdev->usage;492 if (field->logical)493 sensor_field->attribute.attrib_id = field->logical;494 else495 sensor_field->attribute.attrib_id = field->usage[0].hid;496 497 sensor_field->attribute.index = index;498 sensor_field->attribute.report_id = report->id;499 sensor_field->attribute.units = field->unit;500 sensor_field->attribute.unit_expo = field->unit_exponent;501 sensor_field->attribute.size = (field->report_size / 8);502 sensor_field->attribute.logical_minimum = field->logical_minimum;503 sensor_field->attribute.logical_maximum = field->logical_maximum;504 505 if (report_type == HID_FEATURE_REPORT)506 snprintf(sensor_field->group_name,507 sizeof(sensor_field->group_name), "feature-%x-%x",508 sensor_field->attribute.index,509 sensor_field->attribute.attrib_id);510 else if (report_type == HID_INPUT_REPORT) {511 snprintf(sensor_field->group_name,512 sizeof(sensor_field->group_name),513 "input-%x-%x", sensor_field->attribute.index,514 sensor_field->attribute.attrib_id);515 sensor_inst->input_field_count++;516 sensor_inst->input_report_size += (field->report_size *517 field->report_count) / 8;518 }519 520 memset(&sensor_field->hid_custom_attribute_group, 0,521 sizeof(struct attribute_group));522 sensor_inst->sensor_field_count++;523 524 return 0;525}526 527static int hid_sensor_custom_add_fields(struct hid_sensor_custom *sensor_inst,528 struct hid_report_enum *report_enum,529 int report_type)530{531 int i;532 int ret;533 struct hid_report *report;534 struct hid_field *field;535 struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev;536 537 list_for_each_entry(report, &report_enum->report_list, list) {538 for (i = 0; i < report->maxfield; ++i) {539 field = report->field[i];540 if (field->maxusage &&541 ((field->usage[0].collection_index >=542 hsdev->start_collection_index) &&543 (field->usage[0].collection_index <544 hsdev->end_collection_index))) {545 546 ret = hid_sensor_custom_add_field(sensor_inst,547 i,548 report_type,549 report,550 field);551 if (ret)552 return ret;553 554 }555 }556 }557 558 return 0;559}560 561static int hid_sensor_custom_add_attributes(struct hid_sensor_custom562 *sensor_inst)563{564 struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev;565 struct hid_device *hdev = hsdev->hdev;566 int ret = -1;567 int i, j;568 569 for (j = 0; j < HID_REPORT_TYPES; ++j) {570 if (j == HID_OUTPUT_REPORT)571 continue;572 573 ret = hid_sensor_custom_add_fields(sensor_inst,574 &hdev->report_enum[j], j);575 if (ret)576 return ret;577 578 }579 580 /* Create sysfs attributes */581 for (i = 0; i < sensor_inst->sensor_field_count; ++i) {582 j = 0;583 while (j < HID_CUSTOM_TOTAL_ATTRS &&584 hid_custom_attrs[j].name) {585 struct device_attribute *device_attr;586 587 device_attr = &sensor_inst->fields[i].sd_attrs[j];588 589 snprintf((char *)&sensor_inst->fields[i].attr_name[j],590 HID_CUSTOM_NAME_LENGTH, "%s-%s",591 sensor_inst->fields[i].group_name,592 hid_custom_attrs[j].name);593 sysfs_attr_init(&device_attr->attr);594 device_attr->attr.name =595 (char *)&sensor_inst->fields[i].attr_name[j];596 device_attr->attr.mode = hid_custom_attrs[j].mode;597 device_attr->show = show_value;598 if (hid_custom_attrs[j].mode & S_IWUSR)599 device_attr->store = store_value;600 sensor_inst->fields[i].attrs[j] = &device_attr->attr;601 ++j;602 }603 sensor_inst->fields[i].attrs[j] = NULL;604 sensor_inst->fields[i].hid_custom_attribute_group.attrs =605 sensor_inst->fields[i].attrs;606 sensor_inst->fields[i].hid_custom_attribute_group.name =607 sensor_inst->fields[i].group_name;608 ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,609 &sensor_inst->fields[i].610 hid_custom_attribute_group);611 if (ret)612 break;613 614 /* For power or report field store indexes */615 if (sensor_inst->fields[i].attribute.attrib_id ==616 HID_USAGE_SENSOR_PROY_POWER_STATE)617 sensor_inst->power_state = &sensor_inst->fields[i];618 else if (sensor_inst->fields[i].attribute.attrib_id ==619 HID_USAGE_SENSOR_PROP_REPORT_STATE)620 sensor_inst->report_state = &sensor_inst->fields[i];621 }622 623 return ret;624}625 626static void hid_sensor_custom_remove_attributes(struct hid_sensor_custom *627 sensor_inst)628{629 int i;630 631 for (i = 0; i < sensor_inst->sensor_field_count; ++i)632 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,633 &sensor_inst->fields[i].634 hid_custom_attribute_group);635 636 kfree(sensor_inst->fields);637}638 639static ssize_t hid_sensor_custom_read(struct file *file, char __user *buf,640 size_t count, loff_t *f_ps)641{642 struct hid_sensor_custom *sensor_inst;643 unsigned int copied;644 int ret;645 646 sensor_inst = container_of(file->private_data,647 struct hid_sensor_custom, custom_dev);648 649 if (count < sizeof(struct hid_sensor_sample))650 return -EINVAL;651 652 do {653 if (kfifo_is_empty(&sensor_inst->data_fifo)) {654 if (file->f_flags & O_NONBLOCK)655 return -EAGAIN;656 657 ret = wait_event_interruptible(sensor_inst->wait,658 !kfifo_is_empty(&sensor_inst->data_fifo));659 if (ret)660 return ret;661 }662 ret = kfifo_to_user(&sensor_inst->data_fifo, buf, count,663 &copied);664 if (ret)665 return ret;666 667 } while (copied == 0);668 669 return copied;670}671 672static int hid_sensor_custom_release(struct inode *inode, struct file *file)673{674 struct hid_sensor_custom *sensor_inst;675 676 sensor_inst = container_of(file->private_data,677 struct hid_sensor_custom, custom_dev);678 679 clear_bit(0, &sensor_inst->misc_opened);680 681 return 0;682}683 684static int hid_sensor_custom_open(struct inode *inode, struct file *file)685{686 struct hid_sensor_custom *sensor_inst;687 688 sensor_inst = container_of(file->private_data,689 struct hid_sensor_custom, custom_dev);690 /* We essentially have single reader and writer */691 if (test_and_set_bit(0, &sensor_inst->misc_opened))692 return -EBUSY;693 694 return stream_open(inode, file);695}696 697static __poll_t hid_sensor_custom_poll(struct file *file,698 struct poll_table_struct *wait)699{700 struct hid_sensor_custom *sensor_inst;701 __poll_t mask = 0;702 703 sensor_inst = container_of(file->private_data,704 struct hid_sensor_custom, custom_dev);705 706 poll_wait(file, &sensor_inst->wait, wait);707 708 if (!kfifo_is_empty(&sensor_inst->data_fifo))709 mask = EPOLLIN | EPOLLRDNORM;710 711 return mask;712}713 714static const struct file_operations hid_sensor_custom_fops = {715 .open = hid_sensor_custom_open,716 .read = hid_sensor_custom_read,717 .release = hid_sensor_custom_release,718 .poll = hid_sensor_custom_poll,719 .llseek = noop_llseek,720};721 722static int hid_sensor_custom_dev_if_add(struct hid_sensor_custom *sensor_inst)723{724 int ret;725 726 ret = kfifo_alloc(&sensor_inst->data_fifo, HID_CUSTOM_FIFO_SIZE,727 GFP_KERNEL);728 if (ret)729 return ret;730 731 init_waitqueue_head(&sensor_inst->wait);732 733 sensor_inst->custom_dev.minor = MISC_DYNAMIC_MINOR;734 sensor_inst->custom_dev.name = dev_name(&sensor_inst->pdev->dev);735 sensor_inst->custom_dev.fops = &hid_sensor_custom_fops;736 ret = misc_register(&sensor_inst->custom_dev);737 if (ret) {738 kfifo_free(&sensor_inst->data_fifo);739 return ret;740 }741 return 0;742}743 744static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom745 *sensor_inst)746{747 wake_up(&sensor_inst->wait);748 misc_deregister(&sensor_inst->custom_dev);749 kfifo_free(&sensor_inst->data_fifo);750 751}752 753/*754 * Match a known custom sensor.755 * tag and luid is mandatory.756 */757struct hid_sensor_custom_match {758 const char *tag;759 const char *luid;760 const char *model;761 const char *manufacturer;762 bool check_dmi;763 struct dmi_system_id dmi;764};765 766/*767 * Custom sensor properties used for matching.768 */769struct hid_sensor_custom_properties {770 u16 serial_num[HID_CUSTOM_MAX_FEATURE_BYTES];771 u16 model[HID_CUSTOM_MAX_FEATURE_BYTES];772 u16 manufacturer[HID_CUSTOM_MAX_FEATURE_BYTES];773};774 775static const struct hid_sensor_custom_match hid_sensor_custom_known_table[] = {776 /*777 * Intel Integrated Sensor Hub (ISH)778 */779 { /* Intel ISH hinge */780 .tag = "INT",781 .luid = "020B000000000000",782 .manufacturer = "INTEL",783 },784 /*785 * Lenovo Intelligent Sensing Solution (LISS)786 */787 { /* ambient light */788 .tag = "LISS",789 .luid = "0041010200000082",790 .model = "STK3X3X Sensor",791 .manufacturer = "Vendor 258",792 .check_dmi = true,793 .dmi.matches = {794 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),795 }796 },797 { /* human presence */798 .tag = "LISS",799 .luid = "0226000171AC0081",800 .model = "VL53L1_HOD Sensor",801 .manufacturer = "ST_MICRO",802 .check_dmi = true,803 .dmi.matches = {804 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),805 }806 },807 {}808};809 810static bool hid_sensor_custom_prop_match_str(const u16 *prop, const char *match,811 size_t count)812{813 while (count-- && *prop && *match) {814 if (*prop != (u16) *match)815 return false;816 prop++;817 match++;818 }819 820 return (count == -1) || *prop == (u16)*match;821}822 823static int hid_sensor_custom_get_prop(struct hid_sensor_hub_device *hsdev,824 u32 prop_usage_id, size_t prop_size,825 u16 *prop)826{827 struct hid_sensor_hub_attribute_info prop_attr = { 0 };828 int ret;829 830 memset(prop, 0, prop_size);831 832 ret = sensor_hub_input_get_attribute_info(hsdev, HID_FEATURE_REPORT,833 hsdev->usage, prop_usage_id,834 &prop_attr);835 if (ret < 0)836 return ret;837 838 ret = sensor_hub_get_feature(hsdev, prop_attr.report_id,839 prop_attr.index, prop_size, prop);840 if (ret < 0) {841 hid_err(hsdev->hdev, "Failed to get sensor property %08x %d\n",842 prop_usage_id, ret);843 return ret;844 }845 846 return 0;847}848 849static bool850hid_sensor_custom_do_match(struct hid_sensor_hub_device *hsdev,851 const struct hid_sensor_custom_match *match,852 const struct hid_sensor_custom_properties *prop)853{854 struct dmi_system_id dmi[] = { match->dmi, { 0 } };855 856 if (!hid_sensor_custom_prop_match_str(prop->serial_num, "LUID:", 5) ||857 !hid_sensor_custom_prop_match_str(prop->serial_num + 5, match->luid,858 HID_CUSTOM_MAX_FEATURE_BYTES - 5))859 return false;860 861 if (match->model &&862 !hid_sensor_custom_prop_match_str(prop->model, match->model,863 HID_CUSTOM_MAX_FEATURE_BYTES))864 return false;865 866 if (match->manufacturer &&867 !hid_sensor_custom_prop_match_str(prop->manufacturer, match->manufacturer,868 HID_CUSTOM_MAX_FEATURE_BYTES))869 return false;870 871 if (match->check_dmi && !dmi_check_system(dmi))872 return false;873 874 return true;875}876 877static int878hid_sensor_custom_properties_get(struct hid_sensor_hub_device *hsdev,879 struct hid_sensor_custom_properties *prop)880{881 int ret;882 883 ret = hid_sensor_custom_get_prop(hsdev,884 HID_USAGE_SENSOR_PROP_SERIAL_NUM,885 HID_CUSTOM_MAX_FEATURE_BYTES,886 prop->serial_num);887 if (ret < 0)888 return ret;889 890 /*891 * Ignore errors on the following model and manufacturer properties.892 * Because these are optional, it is not an error if they are missing.893 */894 895 hid_sensor_custom_get_prop(hsdev, HID_USAGE_SENSOR_PROP_MODEL,896 HID_CUSTOM_MAX_FEATURE_BYTES,897 prop->model);898 899 hid_sensor_custom_get_prop(hsdev, HID_USAGE_SENSOR_PROP_MANUFACTURER,900 HID_CUSTOM_MAX_FEATURE_BYTES,901 prop->manufacturer);902 903 return 0;904}905 906static int907hid_sensor_custom_get_known(struct hid_sensor_hub_device *hsdev,908 const struct hid_sensor_custom_match **known)909{910 int ret;911 const struct hid_sensor_custom_match *match =912 hid_sensor_custom_known_table;913 struct hid_sensor_custom_properties *prop;914 915 prop = kmalloc(sizeof(struct hid_sensor_custom_properties), GFP_KERNEL);916 if (!prop)917 return -ENOMEM;918 919 ret = hid_sensor_custom_properties_get(hsdev, prop);920 if (ret < 0)921 goto out;922 923 while (match->tag) {924 if (hid_sensor_custom_do_match(hsdev, match, prop)) {925 *known = match;926 ret = 0;927 goto out;928 }929 match++;930 }931 ret = -ENODATA;932out:933 kfree(prop);934 return ret;935}936 937static struct platform_device *938hid_sensor_register_platform_device(struct platform_device *pdev,939 struct hid_sensor_hub_device *hsdev,940 const struct hid_sensor_custom_match *match)941{942 char real_usage[HID_SENSOR_USAGE_LENGTH] = { 0 };943 struct platform_device *custom_pdev;944 const char *dev_name;945 char *c;946 947 memcpy(real_usage, match->luid, 4);948 949 /* usage id are all lowcase */950 for (c = real_usage; *c != '\0'; c++)951 *c = tolower(*c);952 953 /* HID-SENSOR-TAG-REAL_USAGE_ID */954 dev_name = kasprintf(GFP_KERNEL, "HID-SENSOR-%s-%s",955 match->tag, real_usage);956 if (!dev_name)957 return ERR_PTR(-ENOMEM);958 959 custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name,960 PLATFORM_DEVID_AUTO, hsdev,961 sizeof(*hsdev));962 kfree(dev_name);963 return custom_pdev;964}965 966static int hid_sensor_custom_probe(struct platform_device *pdev)967{968 struct hid_sensor_custom *sensor_inst;969 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;970 int ret;971 const struct hid_sensor_custom_match *match;972 973 sensor_inst = devm_kzalloc(&pdev->dev, sizeof(*sensor_inst),974 GFP_KERNEL);975 if (!sensor_inst)976 return -ENOMEM;977 978 sensor_inst->callbacks.capture_sample = hid_sensor_capture_sample;979 sensor_inst->callbacks.send_event = hid_sensor_send_event;980 sensor_inst->callbacks.pdev = pdev;981 sensor_inst->hsdev = hsdev;982 sensor_inst->pdev = pdev;983 mutex_init(&sensor_inst->mutex);984 platform_set_drvdata(pdev, sensor_inst);985 986 ret = hid_sensor_custom_get_known(hsdev, &match);987 if (!ret) {988 sensor_inst->custom_pdev =989 hid_sensor_register_platform_device(pdev, hsdev, match);990 991 ret = PTR_ERR_OR_ZERO(sensor_inst->custom_pdev);992 if (ret) {993 dev_err(&pdev->dev,994 "register_platform_device failed\n");995 return ret;996 }997 998 return 0;999 }1000 1001 ret = sensor_hub_register_callback(hsdev, hsdev->usage,1002 &sensor_inst->callbacks);1003 if (ret < 0) {1004 dev_err(&pdev->dev, "callback reg failed\n");1005 return ret;1006 }1007 1008 ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,1009 &enable_sensor_attr_group);1010 if (ret)1011 goto err_remove_callback;1012 1013 ret = hid_sensor_custom_add_attributes(sensor_inst);1014 if (ret)1015 goto err_remove_group;1016 1017 ret = hid_sensor_custom_dev_if_add(sensor_inst);1018 if (ret)1019 goto err_remove_attributes;1020 1021 return 0;1022 1023err_remove_attributes:1024 hid_sensor_custom_remove_attributes(sensor_inst);1025err_remove_group:1026 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,1027 &enable_sensor_attr_group);1028err_remove_callback:1029 sensor_hub_remove_callback(hsdev, hsdev->usage);1030 1031 return ret;1032}1033 1034static void hid_sensor_custom_remove(struct platform_device *pdev)1035{1036 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev);1037 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;1038 1039 if (sensor_inst->custom_pdev) {1040 platform_device_unregister(sensor_inst->custom_pdev);1041 return;1042 }1043 1044 hid_sensor_custom_dev_if_remove(sensor_inst);1045 hid_sensor_custom_remove_attributes(sensor_inst);1046 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,1047 &enable_sensor_attr_group);1048 sensor_hub_remove_callback(hsdev, hsdev->usage);1049}1050 1051static const struct platform_device_id hid_sensor_custom_ids[] = {1052 {1053 .name = "HID-SENSOR-2000e1",1054 },1055 {1056 .name = "HID-SENSOR-2000e2",1057 },1058 { /* sentinel */ }1059};1060MODULE_DEVICE_TABLE(platform, hid_sensor_custom_ids);1061 1062static struct platform_driver hid_sensor_custom_platform_driver = {1063 .id_table = hid_sensor_custom_ids,1064 .driver = {1065 .name = KBUILD_MODNAME,1066 },1067 .probe = hid_sensor_custom_probe,1068 .remove_new = hid_sensor_custom_remove,1069};1070module_platform_driver(hid_sensor_custom_platform_driver);1071 1072MODULE_DESCRIPTION("HID Sensor Custom and Generic sensor Driver");1073MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");1074MODULE_LICENSE("GPL");1075