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980 lines
27 KiB
980 lines
27 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* hid-sensor-custom.c |
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* Copyright (c) 2015, Intel Corporation. |
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*/ |
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|
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#include <linux/ctype.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/miscdevice.h> |
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#include <linux/kfifo.h> |
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#include <linux/sched.h> |
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#include <linux/wait.h> |
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#include <linux/poll.h> |
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#include <linux/bsearch.h> |
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#include <linux/platform_device.h> |
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#include <linux/hid-sensor-hub.h> |
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#define HID_CUSTOM_NAME_LENGTH 64 |
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#define HID_CUSTOM_MAX_CORE_ATTRS 10 |
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#define HID_CUSTOM_TOTAL_ATTRS (HID_CUSTOM_MAX_CORE_ATTRS + 1) |
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#define HID_CUSTOM_FIFO_SIZE 4096 |
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#define HID_CUSTOM_MAX_FEATURE_BYTES 64 |
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#define HID_SENSOR_USAGE_LENGTH (4 + 1) |
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struct hid_sensor_custom_field { |
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int report_id; |
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char group_name[HID_CUSTOM_NAME_LENGTH]; |
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struct hid_sensor_hub_attribute_info attribute; |
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struct device_attribute sd_attrs[HID_CUSTOM_MAX_CORE_ATTRS]; |
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char attr_name[HID_CUSTOM_TOTAL_ATTRS][HID_CUSTOM_NAME_LENGTH]; |
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struct attribute *attrs[HID_CUSTOM_TOTAL_ATTRS]; |
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struct attribute_group hid_custom_attribute_group; |
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}; |
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struct hid_sensor_custom { |
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struct mutex mutex; |
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struct platform_device *pdev; |
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struct hid_sensor_hub_device *hsdev; |
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struct hid_sensor_hub_callbacks callbacks; |
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int sensor_field_count; |
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struct hid_sensor_custom_field *fields; |
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int input_field_count; |
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int input_report_size; |
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int input_report_recd_size; |
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bool input_skip_sample; |
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bool enable; |
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struct hid_sensor_custom_field *power_state; |
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struct hid_sensor_custom_field *report_state; |
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struct miscdevice custom_dev; |
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struct kfifo data_fifo; |
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unsigned long misc_opened; |
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wait_queue_head_t wait; |
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struct platform_device *custom_pdev; |
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}; |
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|
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/* Header for each sample to user space via dev interface */ |
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struct hid_sensor_sample { |
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u32 usage_id; |
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u64 timestamp; |
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u32 raw_len; |
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} __packed; |
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|
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static struct attribute hid_custom_attrs[] = { |
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{.name = "name", .mode = S_IRUGO}, |
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{.name = "units", .mode = S_IRUGO}, |
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{.name = "unit-expo", .mode = S_IRUGO}, |
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{.name = "minimum", .mode = S_IRUGO}, |
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{.name = "maximum", .mode = S_IRUGO}, |
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{.name = "size", .mode = S_IRUGO}, |
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{.name = "value", .mode = S_IWUSR | S_IRUGO}, |
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{.name = NULL} |
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}; |
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static const struct hid_custom_usage_desc { |
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int usage_id; |
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char *desc; |
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} hid_custom_usage_desc_table[] = { |
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{0x200201, "event-sensor-state"}, |
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{0x200202, "event-sensor-event"}, |
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{0x200301, "property-friendly-name"}, |
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{0x200302, "property-persistent-unique-id"}, |
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{0x200303, "property-sensor-status"}, |
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{0x200304, "property-min-report-interval"}, |
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{0x200305, "property-sensor-manufacturer"}, |
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{0x200306, "property-sensor-model"}, |
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{0x200307, "property-sensor-serial-number"}, |
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{0x200308, "property-sensor-description"}, |
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{0x200309, "property-sensor-connection-type"}, |
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{0x20030A, "property-sensor-device-path"}, |
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{0x20030B, "property-hardware-revision"}, |
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{0x20030C, "property-firmware-version"}, |
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{0x20030D, "property-release-date"}, |
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{0x20030E, "property-report-interval"}, |
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{0x20030F, "property-change-sensitivity-absolute"}, |
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{0x200310, "property-change-sensitivity-percent-range"}, |
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{0x200311, "property-change-sensitivity-percent-relative"}, |
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{0x200312, "property-accuracy"}, |
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{0x200313, "property-resolution"}, |
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{0x200314, "property-maximum"}, |
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{0x200315, "property-minimum"}, |
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{0x200316, "property-reporting-state"}, |
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{0x200317, "property-sampling-rate"}, |
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{0x200318, "property-response-curve"}, |
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{0x200319, "property-power-state"}, |
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{0x200540, "data-field-custom"}, |
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{0x200541, "data-field-custom-usage"}, |
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{0x200542, "data-field-custom-boolean-array"}, |
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{0x200543, "data-field-custom-value"}, |
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{0x200544, "data-field-custom-value_1"}, |
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{0x200545, "data-field-custom-value_2"}, |
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{0x200546, "data-field-custom-value_3"}, |
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{0x200547, "data-field-custom-value_4"}, |
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{0x200548, "data-field-custom-value_5"}, |
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{0x200549, "data-field-custom-value_6"}, |
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{0x20054A, "data-field-custom-value_7"}, |
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{0x20054B, "data-field-custom-value_8"}, |
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{0x20054C, "data-field-custom-value_9"}, |
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{0x20054D, "data-field-custom-value_10"}, |
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{0x20054E, "data-field-custom-value_11"}, |
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{0x20054F, "data-field-custom-value_12"}, |
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{0x200550, "data-field-custom-value_13"}, |
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{0x200551, "data-field-custom-value_14"}, |
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{0x200552, "data-field-custom-value_15"}, |
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{0x200553, "data-field-custom-value_16"}, |
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{0x200554, "data-field-custom-value_17"}, |
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{0x200555, "data-field-custom-value_18"}, |
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{0x200556, "data-field-custom-value_19"}, |
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{0x200557, "data-field-custom-value_20"}, |
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{0x200558, "data-field-custom-value_21"}, |
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{0x200559, "data-field-custom-value_22"}, |
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{0x20055A, "data-field-custom-value_23"}, |
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{0x20055B, "data-field-custom-value_24"}, |
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{0x20055C, "data-field-custom-value_25"}, |
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{0x20055D, "data-field-custom-value_26"}, |
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{0x20055E, "data-field-custom-value_27"}, |
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{0x20055F, "data-field-custom-value_28"}, |
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}; |
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static int usage_id_cmp(const void *p1, const void *p2) |
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{ |
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if (*(int *)p1 < *(int *)p2) |
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return -1; |
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if (*(int *)p1 > *(int *)p2) |
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return 1; |
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return 0; |
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} |
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static ssize_t enable_sensor_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); |
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return sprintf(buf, "%d\n", sensor_inst->enable); |
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} |
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static int set_power_report_state(struct hid_sensor_custom *sensor_inst, |
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bool state) |
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{ |
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int power_val = -1; |
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int report_val = -1; |
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u32 power_state_usage_id; |
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u32 report_state_usage_id; |
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int ret; |
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/* |
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* It is possible that the power/report state ids are not present. |
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* In this case this function will return success. But if the |
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* ids are present, then it will return error if set fails. |
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*/ |
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if (state) { |
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power_state_usage_id = |
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HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM; |
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report_state_usage_id = |
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HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM; |
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} else { |
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power_state_usage_id = |
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HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM; |
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report_state_usage_id = |
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HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM; |
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} |
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if (sensor_inst->power_state) |
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power_val = hid_sensor_get_usage_index(sensor_inst->hsdev, |
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sensor_inst->power_state->attribute.report_id, |
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sensor_inst->power_state->attribute.index, |
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power_state_usage_id); |
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if (sensor_inst->report_state) |
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report_val = hid_sensor_get_usage_index(sensor_inst->hsdev, |
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sensor_inst->report_state->attribute.report_id, |
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sensor_inst->report_state->attribute.index, |
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report_state_usage_id); |
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if (power_val >= 0) { |
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power_val += |
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sensor_inst->power_state->attribute.logical_minimum; |
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ret = sensor_hub_set_feature(sensor_inst->hsdev, |
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sensor_inst->power_state->attribute.report_id, |
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sensor_inst->power_state->attribute.index, |
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sizeof(power_val), |
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&power_val); |
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if (ret) { |
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hid_err(sensor_inst->hsdev->hdev, |
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"Set power state failed\n"); |
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return ret; |
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} |
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} |
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if (report_val >= 0) { |
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report_val += |
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sensor_inst->report_state->attribute.logical_minimum; |
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ret = sensor_hub_set_feature(sensor_inst->hsdev, |
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sensor_inst->report_state->attribute.report_id, |
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sensor_inst->report_state->attribute.index, |
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sizeof(report_val), |
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&report_val); |
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if (ret) { |
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hid_err(sensor_inst->hsdev->hdev, |
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"Set report state failed\n"); |
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return ret; |
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} |
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} |
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return 0; |
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} |
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static ssize_t enable_sensor_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); |
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int value; |
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int ret = -EINVAL; |
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if (kstrtoint(buf, 0, &value) != 0) |
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return -EINVAL; |
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mutex_lock(&sensor_inst->mutex); |
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if (value && !sensor_inst->enable) { |
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ret = sensor_hub_device_open(sensor_inst->hsdev); |
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if (ret) |
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goto unlock_state; |
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ret = set_power_report_state(sensor_inst, true); |
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if (ret) { |
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sensor_hub_device_close(sensor_inst->hsdev); |
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goto unlock_state; |
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} |
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sensor_inst->enable = true; |
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} else if (!value && sensor_inst->enable) { |
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ret = set_power_report_state(sensor_inst, false); |
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sensor_hub_device_close(sensor_inst->hsdev); |
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sensor_inst->enable = false; |
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} |
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unlock_state: |
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mutex_unlock(&sensor_inst->mutex); |
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if (ret < 0) |
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return ret; |
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return count; |
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} |
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static DEVICE_ATTR_RW(enable_sensor); |
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static struct attribute *enable_sensor_attrs[] = { |
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&dev_attr_enable_sensor.attr, |
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NULL, |
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}; |
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static const struct attribute_group enable_sensor_attr_group = { |
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.attrs = enable_sensor_attrs, |
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}; |
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static ssize_t show_value(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); |
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struct hid_sensor_hub_attribute_info *attribute; |
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int index, usage, field_index; |
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char name[HID_CUSTOM_NAME_LENGTH]; |
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bool feature = false; |
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bool input = false; |
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int value = 0; |
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if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage, |
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name) == 3) { |
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feature = true; |
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field_index = index + sensor_inst->input_field_count; |
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} else if (sscanf(attr->attr.name, "input-%x-%x-%s", &index, &usage, |
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name) == 3) { |
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input = true; |
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field_index = index; |
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} else |
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return -EINVAL; |
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if (!strncmp(name, "value", strlen("value"))) { |
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u32 report_id; |
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int ret; |
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attribute = &sensor_inst->fields[field_index].attribute; |
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report_id = attribute->report_id; |
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if (feature) { |
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u8 values[HID_CUSTOM_MAX_FEATURE_BYTES]; |
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int len = 0; |
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u64 value = 0; |
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int i = 0; |
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ret = sensor_hub_get_feature(sensor_inst->hsdev, |
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report_id, |
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index, |
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sizeof(values), values); |
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if (ret < 0) |
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return ret; |
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while (i < ret) { |
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if (i + attribute->size > ret) { |
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len += scnprintf(&buf[len], |
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PAGE_SIZE - len, |
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"%d ", values[i]); |
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break; |
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} |
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switch (attribute->size) { |
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case 2: |
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value = (u64) *(u16 *)&values[i]; |
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i += attribute->size; |
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break; |
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case 4: |
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value = (u64) *(u32 *)&values[i]; |
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i += attribute->size; |
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break; |
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case 8: |
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value = *(u64 *)&values[i]; |
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i += attribute->size; |
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break; |
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default: |
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value = (u64) values[i]; |
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++i; |
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break; |
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} |
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len += scnprintf(&buf[len], PAGE_SIZE - len, |
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"%lld ", value); |
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} |
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len += scnprintf(&buf[len], PAGE_SIZE - len, "\n"); |
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return len; |
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} else if (input) |
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value = sensor_hub_input_attr_get_raw_value( |
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sensor_inst->hsdev, |
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sensor_inst->hsdev->usage, |
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usage, report_id, |
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SENSOR_HUB_SYNC, false); |
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} else if (!strncmp(name, "units", strlen("units"))) |
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value = sensor_inst->fields[field_index].attribute.units; |
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else if (!strncmp(name, "unit-expo", strlen("unit-expo"))) |
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value = sensor_inst->fields[field_index].attribute.unit_expo; |
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else if (!strncmp(name, "size", strlen("size"))) |
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value = sensor_inst->fields[field_index].attribute.size; |
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else if (!strncmp(name, "minimum", strlen("minimum"))) |
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value = sensor_inst->fields[field_index].attribute. |
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logical_minimum; |
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else if (!strncmp(name, "maximum", strlen("maximum"))) |
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value = sensor_inst->fields[field_index].attribute. |
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logical_maximum; |
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else if (!strncmp(name, "name", strlen("name"))) { |
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struct hid_custom_usage_desc *usage_desc; |
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usage_desc = bsearch(&usage, hid_custom_usage_desc_table, |
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ARRAY_SIZE(hid_custom_usage_desc_table), |
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sizeof(struct hid_custom_usage_desc), |
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usage_id_cmp); |
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if (usage_desc) |
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return snprintf(buf, PAGE_SIZE, "%s\n", |
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usage_desc->desc); |
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else |
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return sprintf(buf, "not-specified\n"); |
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} else |
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return -EINVAL; |
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return sprintf(buf, "%d\n", value); |
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} |
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static ssize_t store_value(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); |
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int index, field_index, usage; |
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char name[HID_CUSTOM_NAME_LENGTH]; |
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int value; |
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if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage, |
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name) == 3) { |
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field_index = index + sensor_inst->input_field_count; |
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} else |
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return -EINVAL; |
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if (!strncmp(name, "value", strlen("value"))) { |
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u32 report_id; |
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int ret; |
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if (kstrtoint(buf, 0, &value) != 0) |
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return -EINVAL; |
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report_id = sensor_inst->fields[field_index].attribute. |
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report_id; |
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ret = sensor_hub_set_feature(sensor_inst->hsdev, report_id, |
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index, sizeof(value), &value); |
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} else |
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return -EINVAL; |
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return count; |
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} |
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static int hid_sensor_capture_sample(struct hid_sensor_hub_device *hsdev, |
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unsigned usage_id, size_t raw_len, |
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char *raw_data, void *priv) |
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{ |
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struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv); |
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struct hid_sensor_sample header; |
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/* If any error occurs in a sample, rest of the fields are ignored */ |
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if (sensor_inst->input_skip_sample) { |
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hid_err(sensor_inst->hsdev->hdev, "Skipped remaining data\n"); |
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return 0; |
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} |
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hid_dbg(sensor_inst->hsdev->hdev, "%s received %d of %d\n", __func__, |
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(int) (sensor_inst->input_report_recd_size + raw_len), |
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sensor_inst->input_report_size); |
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if (!test_bit(0, &sensor_inst->misc_opened)) |
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return 0; |
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if (!sensor_inst->input_report_recd_size) { |
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int required_size = sizeof(struct hid_sensor_sample) + |
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sensor_inst->input_report_size; |
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header.usage_id = hsdev->usage; |
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header.raw_len = sensor_inst->input_report_size; |
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header.timestamp = ktime_get_real_ns(); |
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if (kfifo_avail(&sensor_inst->data_fifo) >= required_size) { |
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kfifo_in(&sensor_inst->data_fifo, |
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(unsigned char *)&header, |
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sizeof(header)); |
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} else |
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sensor_inst->input_skip_sample = true; |
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} |
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if (kfifo_avail(&sensor_inst->data_fifo) >= raw_len) |
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kfifo_in(&sensor_inst->data_fifo, (unsigned char *)raw_data, |
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raw_len); |
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sensor_inst->input_report_recd_size += raw_len; |
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return 0; |
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} |
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static int hid_sensor_send_event(struct hid_sensor_hub_device *hsdev, |
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unsigned usage_id, void *priv) |
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{ |
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struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv); |
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if (!test_bit(0, &sensor_inst->misc_opened)) |
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return 0; |
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sensor_inst->input_report_recd_size = 0; |
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sensor_inst->input_skip_sample = false; |
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wake_up(&sensor_inst->wait); |
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return 0; |
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} |
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static int hid_sensor_custom_add_field(struct hid_sensor_custom *sensor_inst, |
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int index, int report_type, |
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struct hid_report *report, |
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struct hid_field *field) |
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{ |
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struct hid_sensor_custom_field *sensor_field; |
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void *fields; |
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fields = krealloc(sensor_inst->fields, |
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(sensor_inst->sensor_field_count + 1) * |
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sizeof(struct hid_sensor_custom_field), GFP_KERNEL); |
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if (!fields) { |
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kfree(sensor_inst->fields); |
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return -ENOMEM; |
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} |
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sensor_inst->fields = fields; |
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sensor_field = &sensor_inst->fields[sensor_inst->sensor_field_count]; |
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sensor_field->attribute.usage_id = sensor_inst->hsdev->usage; |
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if (field->logical) |
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sensor_field->attribute.attrib_id = field->logical; |
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else |
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sensor_field->attribute.attrib_id = field->usage[0].hid; |
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|
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sensor_field->attribute.index = index; |
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sensor_field->attribute.report_id = report->id; |
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sensor_field->attribute.units = field->unit; |
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sensor_field->attribute.unit_expo = field->unit_exponent; |
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sensor_field->attribute.size = (field->report_size / 8); |
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sensor_field->attribute.logical_minimum = field->logical_minimum; |
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sensor_field->attribute.logical_maximum = field->logical_maximum; |
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|
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if (report_type == HID_FEATURE_REPORT) |
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snprintf(sensor_field->group_name, |
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sizeof(sensor_field->group_name), "feature-%x-%x", |
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sensor_field->attribute.index, |
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sensor_field->attribute.attrib_id); |
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else if (report_type == HID_INPUT_REPORT) { |
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snprintf(sensor_field->group_name, |
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sizeof(sensor_field->group_name), |
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"input-%x-%x", sensor_field->attribute.index, |
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sensor_field->attribute.attrib_id); |
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sensor_inst->input_field_count++; |
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sensor_inst->input_report_size += (field->report_size * |
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field->report_count) / 8; |
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} |
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|
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memset(&sensor_field->hid_custom_attribute_group, 0, |
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sizeof(struct attribute_group)); |
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sensor_inst->sensor_field_count++; |
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|
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return 0; |
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} |
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|
|
static int hid_sensor_custom_add_fields(struct hid_sensor_custom *sensor_inst, |
|
struct hid_report_enum *report_enum, |
|
int report_type) |
|
{ |
|
int i; |
|
int ret; |
|
struct hid_report *report; |
|
struct hid_field *field; |
|
struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev; |
|
|
|
list_for_each_entry(report, &report_enum->report_list, list) { |
|
for (i = 0; i < report->maxfield; ++i) { |
|
field = report->field[i]; |
|
if (field->maxusage && |
|
((field->usage[0].collection_index >= |
|
hsdev->start_collection_index) && |
|
(field->usage[0].collection_index < |
|
hsdev->end_collection_index))) { |
|
|
|
ret = hid_sensor_custom_add_field(sensor_inst, |
|
i, |
|
report_type, |
|
report, |
|
field); |
|
if (ret) |
|
return ret; |
|
|
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int hid_sensor_custom_add_attributes(struct hid_sensor_custom |
|
*sensor_inst) |
|
{ |
|
struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev; |
|
struct hid_device *hdev = hsdev->hdev; |
|
int ret = -1; |
|
int i, j; |
|
|
|
for (j = 0; j < HID_REPORT_TYPES; ++j) { |
|
if (j == HID_OUTPUT_REPORT) |
|
continue; |
|
|
|
ret = hid_sensor_custom_add_fields(sensor_inst, |
|
&hdev->report_enum[j], j); |
|
if (ret) |
|
return ret; |
|
|
|
} |
|
|
|
/* Create sysfs attributes */ |
|
for (i = 0; i < sensor_inst->sensor_field_count; ++i) { |
|
j = 0; |
|
while (j < HID_CUSTOM_TOTAL_ATTRS && |
|
hid_custom_attrs[j].name) { |
|
struct device_attribute *device_attr; |
|
|
|
device_attr = &sensor_inst->fields[i].sd_attrs[j]; |
|
|
|
snprintf((char *)&sensor_inst->fields[i].attr_name[j], |
|
HID_CUSTOM_NAME_LENGTH, "%s-%s", |
|
sensor_inst->fields[i].group_name, |
|
hid_custom_attrs[j].name); |
|
sysfs_attr_init(&device_attr->attr); |
|
device_attr->attr.name = |
|
(char *)&sensor_inst->fields[i].attr_name[j]; |
|
device_attr->attr.mode = hid_custom_attrs[j].mode; |
|
device_attr->show = show_value; |
|
if (hid_custom_attrs[j].mode & S_IWUSR) |
|
device_attr->store = store_value; |
|
sensor_inst->fields[i].attrs[j] = &device_attr->attr; |
|
++j; |
|
} |
|
sensor_inst->fields[i].attrs[j] = NULL; |
|
sensor_inst->fields[i].hid_custom_attribute_group.attrs = |
|
sensor_inst->fields[i].attrs; |
|
sensor_inst->fields[i].hid_custom_attribute_group.name = |
|
sensor_inst->fields[i].group_name; |
|
ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj, |
|
&sensor_inst->fields[i]. |
|
hid_custom_attribute_group); |
|
if (ret) |
|
break; |
|
|
|
/* For power or report field store indexes */ |
|
if (sensor_inst->fields[i].attribute.attrib_id == |
|
HID_USAGE_SENSOR_PROY_POWER_STATE) |
|
sensor_inst->power_state = &sensor_inst->fields[i]; |
|
else if (sensor_inst->fields[i].attribute.attrib_id == |
|
HID_USAGE_SENSOR_PROP_REPORT_STATE) |
|
sensor_inst->report_state = &sensor_inst->fields[i]; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static void hid_sensor_custom_remove_attributes(struct hid_sensor_custom * |
|
sensor_inst) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < sensor_inst->sensor_field_count; ++i) |
|
sysfs_remove_group(&sensor_inst->pdev->dev.kobj, |
|
&sensor_inst->fields[i]. |
|
hid_custom_attribute_group); |
|
|
|
kfree(sensor_inst->fields); |
|
} |
|
|
|
static ssize_t hid_sensor_custom_read(struct file *file, char __user *buf, |
|
size_t count, loff_t *f_ps) |
|
{ |
|
struct hid_sensor_custom *sensor_inst; |
|
unsigned int copied; |
|
int ret; |
|
|
|
sensor_inst = container_of(file->private_data, |
|
struct hid_sensor_custom, custom_dev); |
|
|
|
if (count < sizeof(struct hid_sensor_sample)) |
|
return -EINVAL; |
|
|
|
do { |
|
if (kfifo_is_empty(&sensor_inst->data_fifo)) { |
|
if (file->f_flags & O_NONBLOCK) |
|
return -EAGAIN; |
|
|
|
ret = wait_event_interruptible(sensor_inst->wait, |
|
!kfifo_is_empty(&sensor_inst->data_fifo)); |
|
if (ret) |
|
return ret; |
|
} |
|
ret = kfifo_to_user(&sensor_inst->data_fifo, buf, count, |
|
&copied); |
|
if (ret) |
|
return ret; |
|
|
|
} while (copied == 0); |
|
|
|
return copied; |
|
} |
|
|
|
static int hid_sensor_custom_release(struct inode *inode, struct file *file) |
|
{ |
|
struct hid_sensor_custom *sensor_inst; |
|
|
|
sensor_inst = container_of(file->private_data, |
|
struct hid_sensor_custom, custom_dev); |
|
|
|
clear_bit(0, &sensor_inst->misc_opened); |
|
|
|
return 0; |
|
} |
|
|
|
static int hid_sensor_custom_open(struct inode *inode, struct file *file) |
|
{ |
|
struct hid_sensor_custom *sensor_inst; |
|
|
|
sensor_inst = container_of(file->private_data, |
|
struct hid_sensor_custom, custom_dev); |
|
/* We essentially have single reader and writer */ |
|
if (test_and_set_bit(0, &sensor_inst->misc_opened)) |
|
return -EBUSY; |
|
|
|
return stream_open(inode, file); |
|
} |
|
|
|
static __poll_t hid_sensor_custom_poll(struct file *file, |
|
struct poll_table_struct *wait) |
|
{ |
|
struct hid_sensor_custom *sensor_inst; |
|
__poll_t mask = 0; |
|
|
|
sensor_inst = container_of(file->private_data, |
|
struct hid_sensor_custom, custom_dev); |
|
|
|
poll_wait(file, &sensor_inst->wait, wait); |
|
|
|
if (!kfifo_is_empty(&sensor_inst->data_fifo)) |
|
mask = EPOLLIN | EPOLLRDNORM; |
|
|
|
return mask; |
|
} |
|
|
|
static const struct file_operations hid_sensor_custom_fops = { |
|
.open = hid_sensor_custom_open, |
|
.read = hid_sensor_custom_read, |
|
.release = hid_sensor_custom_release, |
|
.poll = hid_sensor_custom_poll, |
|
.llseek = noop_llseek, |
|
}; |
|
|
|
static int hid_sensor_custom_dev_if_add(struct hid_sensor_custom *sensor_inst) |
|
{ |
|
int ret; |
|
|
|
ret = kfifo_alloc(&sensor_inst->data_fifo, HID_CUSTOM_FIFO_SIZE, |
|
GFP_KERNEL); |
|
if (ret) |
|
return ret; |
|
|
|
init_waitqueue_head(&sensor_inst->wait); |
|
|
|
sensor_inst->custom_dev.minor = MISC_DYNAMIC_MINOR; |
|
sensor_inst->custom_dev.name = dev_name(&sensor_inst->pdev->dev); |
|
sensor_inst->custom_dev.fops = &hid_sensor_custom_fops, |
|
ret = misc_register(&sensor_inst->custom_dev); |
|
if (ret) { |
|
kfifo_free(&sensor_inst->data_fifo); |
|
return ret; |
|
} |
|
return 0; |
|
} |
|
|
|
static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom |
|
*sensor_inst) |
|
{ |
|
wake_up(&sensor_inst->wait); |
|
misc_deregister(&sensor_inst->custom_dev); |
|
kfifo_free(&sensor_inst->data_fifo); |
|
|
|
} |
|
|
|
/* luid defined in FW (e.g. ISH). Maybe used to identify sensor. */ |
|
static const char *const known_sensor_luid[] = { "020B000000000000" }; |
|
|
|
static int get_luid_table_index(unsigned char *usage_str) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(known_sensor_luid); i++) { |
|
if (!strncmp(usage_str, known_sensor_luid[i], |
|
strlen(known_sensor_luid[i]))) |
|
return i; |
|
} |
|
|
|
return -ENODEV; |
|
} |
|
|
|
static int get_known_custom_sensor_index(struct hid_sensor_hub_device *hsdev) |
|
{ |
|
struct hid_sensor_hub_attribute_info sensor_manufacturer = { 0 }; |
|
struct hid_sensor_hub_attribute_info sensor_luid_info = { 0 }; |
|
int report_size; |
|
int ret; |
|
static u16 w_buf[HID_CUSTOM_MAX_FEATURE_BYTES]; |
|
static char buf[HID_CUSTOM_MAX_FEATURE_BYTES]; |
|
int i; |
|
|
|
memset(w_buf, 0, sizeof(w_buf)); |
|
memset(buf, 0, sizeof(buf)); |
|
|
|
/* get manufacturer info */ |
|
ret = sensor_hub_input_get_attribute_info(hsdev, |
|
HID_FEATURE_REPORT, hsdev->usage, |
|
HID_USAGE_SENSOR_PROP_MANUFACTURER, &sensor_manufacturer); |
|
if (ret < 0) |
|
return ret; |
|
|
|
report_size = |
|
sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id, |
|
sensor_manufacturer.index, sizeof(w_buf), |
|
w_buf); |
|
if (report_size <= 0) { |
|
hid_err(hsdev->hdev, |
|
"Failed to get sensor manufacturer info %d\n", |
|
report_size); |
|
return -ENODEV; |
|
} |
|
|
|
/* convert from wide char to char */ |
|
for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++) |
|
buf[i] = (char)w_buf[i]; |
|
|
|
/* ensure it's ISH sensor */ |
|
if (strncmp(buf, "INTEL", strlen("INTEL"))) |
|
return -ENODEV; |
|
|
|
memset(w_buf, 0, sizeof(w_buf)); |
|
memset(buf, 0, sizeof(buf)); |
|
|
|
/* get real usage id */ |
|
ret = sensor_hub_input_get_attribute_info(hsdev, |
|
HID_FEATURE_REPORT, hsdev->usage, |
|
HID_USAGE_SENSOR_PROP_SERIAL_NUM, &sensor_luid_info); |
|
if (ret < 0) |
|
return ret; |
|
|
|
report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id, |
|
sensor_luid_info.index, sizeof(w_buf), |
|
w_buf); |
|
if (report_size <= 0) { |
|
hid_err(hsdev->hdev, "Failed to get real usage info %d\n", |
|
report_size); |
|
return -ENODEV; |
|
} |
|
|
|
/* convert from wide char to char */ |
|
for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++) |
|
buf[i] = (char)w_buf[i]; |
|
|
|
if (strlen(buf) != strlen(known_sensor_luid[0]) + 5) { |
|
hid_err(hsdev->hdev, |
|
"%s luid length not match %zu != (%zu + 5)\n", __func__, |
|
strlen(buf), strlen(known_sensor_luid[0])); |
|
return -ENODEV; |
|
} |
|
|
|
/* get table index with luid (not matching 'LUID: ' in luid) */ |
|
return get_luid_table_index(&buf[5]); |
|
} |
|
|
|
static struct platform_device * |
|
hid_sensor_register_platform_device(struct platform_device *pdev, |
|
struct hid_sensor_hub_device *hsdev, |
|
int index) |
|
{ |
|
char real_usage[HID_SENSOR_USAGE_LENGTH] = { 0 }; |
|
struct platform_device *custom_pdev; |
|
const char *dev_name; |
|
char *c; |
|
|
|
/* copy real usage id */ |
|
memcpy(real_usage, known_sensor_luid[index], 4); |
|
|
|
/* usage id are all lowcase */ |
|
for (c = real_usage; *c != '\0'; c++) |
|
*c = tolower(*c); |
|
|
|
/* HID-SENSOR-INT-REAL_USAGE_ID */ |
|
dev_name = kasprintf(GFP_KERNEL, "HID-SENSOR-INT-%s", real_usage); |
|
if (!dev_name) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name, |
|
PLATFORM_DEVID_NONE, hsdev, |
|
sizeof(*hsdev)); |
|
kfree(dev_name); |
|
return custom_pdev; |
|
} |
|
|
|
static int hid_sensor_custom_probe(struct platform_device *pdev) |
|
{ |
|
struct hid_sensor_custom *sensor_inst; |
|
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; |
|
int ret; |
|
int index; |
|
|
|
sensor_inst = devm_kzalloc(&pdev->dev, sizeof(*sensor_inst), |
|
GFP_KERNEL); |
|
if (!sensor_inst) |
|
return -ENOMEM; |
|
|
|
sensor_inst->callbacks.capture_sample = hid_sensor_capture_sample; |
|
sensor_inst->callbacks.send_event = hid_sensor_send_event; |
|
sensor_inst->callbacks.pdev = pdev; |
|
sensor_inst->hsdev = hsdev; |
|
sensor_inst->pdev = pdev; |
|
mutex_init(&sensor_inst->mutex); |
|
platform_set_drvdata(pdev, sensor_inst); |
|
|
|
index = get_known_custom_sensor_index(hsdev); |
|
if (index >= 0 && index < ARRAY_SIZE(known_sensor_luid)) { |
|
sensor_inst->custom_pdev = |
|
hid_sensor_register_platform_device(pdev, hsdev, index); |
|
|
|
ret = PTR_ERR_OR_ZERO(sensor_inst->custom_pdev); |
|
if (ret) { |
|
dev_err(&pdev->dev, |
|
"register_platform_device failed\n"); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
ret = sensor_hub_register_callback(hsdev, hsdev->usage, |
|
&sensor_inst->callbacks); |
|
if (ret < 0) { |
|
dev_err(&pdev->dev, "callback reg failed\n"); |
|
return ret; |
|
} |
|
|
|
ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj, |
|
&enable_sensor_attr_group); |
|
if (ret) |
|
goto err_remove_callback; |
|
|
|
ret = hid_sensor_custom_add_attributes(sensor_inst); |
|
if (ret) |
|
goto err_remove_group; |
|
|
|
ret = hid_sensor_custom_dev_if_add(sensor_inst); |
|
if (ret) |
|
goto err_remove_attributes; |
|
|
|
return 0; |
|
|
|
err_remove_attributes: |
|
hid_sensor_custom_remove_attributes(sensor_inst); |
|
err_remove_group: |
|
sysfs_remove_group(&sensor_inst->pdev->dev.kobj, |
|
&enable_sensor_attr_group); |
|
err_remove_callback: |
|
sensor_hub_remove_callback(hsdev, hsdev->usage); |
|
|
|
return ret; |
|
} |
|
|
|
static int hid_sensor_custom_remove(struct platform_device *pdev) |
|
{ |
|
struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev); |
|
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; |
|
|
|
if (sensor_inst->custom_pdev) { |
|
platform_device_unregister(sensor_inst->custom_pdev); |
|
return 0; |
|
} |
|
|
|
hid_sensor_custom_dev_if_remove(sensor_inst); |
|
hid_sensor_custom_remove_attributes(sensor_inst); |
|
sysfs_remove_group(&sensor_inst->pdev->dev.kobj, |
|
&enable_sensor_attr_group); |
|
sensor_hub_remove_callback(hsdev, hsdev->usage); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct platform_device_id hid_sensor_custom_ids[] = { |
|
{ |
|
.name = "HID-SENSOR-2000e1", |
|
}, |
|
{ |
|
.name = "HID-SENSOR-2000e2", |
|
}, |
|
{ /* sentinel */ } |
|
}; |
|
MODULE_DEVICE_TABLE(platform, hid_sensor_custom_ids); |
|
|
|
static struct platform_driver hid_sensor_custom_platform_driver = { |
|
.id_table = hid_sensor_custom_ids, |
|
.driver = { |
|
.name = KBUILD_MODNAME, |
|
}, |
|
.probe = hid_sensor_custom_probe, |
|
.remove = hid_sensor_custom_remove, |
|
}; |
|
module_platform_driver(hid_sensor_custom_platform_driver); |
|
|
|
MODULE_DESCRIPTION("HID Sensor Custom and Generic sensor Driver"); |
|
MODULE_AUTHOR("Srinivas Pandruvada <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|